1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/gcLocker.inline.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/instanceOop.hpp"
45 #include "oops/markOop.hpp"
46 #include "oops/method.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/typeArrayKlass.hpp"
52 #include "oops/typeArrayOop.hpp"
53 #include "prims/jni.h"
54 #include "prims/jniCheck.hpp"
55 #include "prims/jniExport.hpp"
56 #include "prims/jniFastGetField.hpp"
57 #include "prims/jvm.h"
58 #include "prims/jvm_misc.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "runtime/atomic.inline.hpp"
62 #include "runtime/compilationPolicy.hpp"
63 #include "runtime/fieldDescriptor.hpp"
64 #include "runtime/fprofiler.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/interfaceSupport.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/orderAccess.inline.hpp"
71 #include "runtime/reflection.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/signature.hpp"
74 #include "runtime/thread.inline.hpp"
75 #include "runtime/vm_operations.hpp"
76 #include "services/memTracker.hpp"
77 #include "services/runtimeService.hpp"
78 #include "trace/traceMacros.hpp"
79 #include "trace/tracing.hpp"
80 #include "utilities/defaultStream.hpp"
81 #include "utilities/dtrace.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/histogram.hpp"
84 #include "utilities/internalVMTests.hpp"
85 #include "utilities/macros.hpp"
86 #if INCLUDE_ALL_GCS
87 #include "gc/shared/satbMarkQueue.hpp"
88 #endif // INCLUDE_ALL_GCS
89 #if INCLUDE_JVMCI
90 #include "jvmci/jvmciCompiler.hpp"
91 #include "jvmci/jvmciRuntime.hpp"
92 #endif
93
94 static jint CurrentVersion = JNI_VERSION_9;
95
96 #ifdef _WIN32
97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
98 #endif
99
100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
101 // '-return' probe regardless of the return path is taken out of the function.
102 // Methods that have multiple return paths use this to avoid having to
103 // instrument each return path. Methods that use CHECK or THROW must use this
104 // since those macros can cause an immedate uninstrumented return.
105 //
106 // In order to get the return value, a reference to the variable containing
107 // the return value must be passed to the contructor of the object, and
108 // the return value must be set before return (since the mark object has
109 // a reference to it).
110 //
111 // Example:
112 // DT_RETURN_MARK_DECL(SomeFunc, int);
113 // JNI_ENTRY(int, SomeFunc, ...)
114 // int return_value = 0;
115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
116 // foo(CHECK_0)
117 // return_value = 5;
118 // return return_value;
119 // JNI_END
120 #define DT_RETURN_MARK_DECL(name, type, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 const type& _ret_ref; \
125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
126 ~DTraceReturnProbeMark_##name() { \
127 probe; \
128 } \
129 } \
130 )
131 // Void functions are simpler since there's no return value
132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141
142 // Place these macros in the function to mark the return. Non-void
143 // functions need the type and address of the return value.
144 #define DT_RETURN_MARK(name, type, ref) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
146 #define DT_VOID_RETURN_MARK(name) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
148
149
150 // Use these to select distinct code for floating-point vs. non-floating point
151 // situations. Used from within common macros where we need slightly
152 // different behavior for Float/Double
153 #define FP_SELECT_Boolean(intcode, fpcode) intcode
154 #define FP_SELECT_Byte(intcode, fpcode) intcode
155 #define FP_SELECT_Char(intcode, fpcode) intcode
156 #define FP_SELECT_Short(intcode, fpcode) intcode
157 #define FP_SELECT_Object(intcode, fpcode) intcode
158 #define FP_SELECT_Int(intcode, fpcode) intcode
159 #define FP_SELECT_Long(intcode, fpcode) intcode
160 #define FP_SELECT_Float(intcode, fpcode) fpcode
161 #define FP_SELECT_Double(intcode, fpcode) fpcode
162 #define FP_SELECT(TypeName, intcode, fpcode) \
163 FP_SELECT_##TypeName(intcode, fpcode)
164
165 #define COMMA ,
166
167 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
168 // (dtrace doesn't do FP yet)
169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
173 FP_SELECT(TypeName, \
174 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
175
176
177 // out-of-line helpers for class jfieldIDWorkaround:
178
179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
180 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
181 uintptr_t as_uint = (uintptr_t) id;
182 intptr_t offset = raw_instance_offset(id);
183 if (is_checked_jfieldID(id)) {
184 if (!klass_hash_ok(k, id)) {
185 return false;
186 }
187 }
188 return InstanceKlass::cast(k)->contains_field_offset(offset);
189 } else {
190 JNIid* result = (JNIid*) id;
191 #ifdef ASSERT
192 return result != NULL && result->is_static_field_id();
193 #else
194 return result != NULL;
195 #endif
196 }
197 }
198
199
200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
201 if (offset <= small_offset_mask) {
202 Klass* field_klass = k;
203 Klass* super_klass = field_klass->super();
204 // With compressed oops the most super class with nonstatic fields would
205 // be the owner of fields embedded in the header.
206 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
207 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
208 field_klass = super_klass; // super contains the field also
209 super_klass = field_klass->super();
210 }
211 debug_only(NoSafepointVerifier nosafepoint;)
212 uintptr_t klass_hash = field_klass->identity_hash();
213 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
214 } else {
215 #if 0
216 #ifndef PRODUCT
217 {
218 ResourceMark rm;
219 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
220 }
221 #endif
222 #endif
223 return 0;
224 }
225 }
226
227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
228 uintptr_t as_uint = (uintptr_t) id;
229 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
230 do {
231 debug_only(NoSafepointVerifier nosafepoint;)
232 // Could use a non-blocking query for identity_hash here...
233 if ((k->identity_hash() & klass_mask) == klass_hash)
234 return true;
235 k = k->super();
236 } while (k != NULL);
237 return false;
238 }
239
240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
241 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
242 uintptr_t as_uint = (uintptr_t) id;
243 intptr_t offset = raw_instance_offset(id);
244 if (VerifyJNIFields) {
245 if (is_checked_jfieldID(id)) {
246 guarantee(klass_hash_ok(k, id),
247 "Bug in native code: jfieldID class must match object");
248 } else {
249 #if 0
250 #ifndef PRODUCT
251 if (Verbose) {
252 ResourceMark rm;
253 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
254 }
255 #endif
256 #endif
257 }
258 }
259 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
260 "Bug in native code: jfieldID offset must address interior of object");
261 }
262
263 // Wrapper to trace JNI functions
264
265 #ifdef ASSERT
266 Histogram* JNIHistogram;
267 static volatile jint JNIHistogram_lock = 0;
268
269 class JNIHistogramElement : public HistogramElement {
270 public:
271 JNIHistogramElement(const char* name);
272 };
273
274 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
275 _name = elementName;
276 uintx count = 0;
277
278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
280 count +=1;
281 if ( (WarnOnStalledSpinLock > 0)
282 && (count % WarnOnStalledSpinLock == 0)) {
283 warning("JNIHistogram_lock seems to be stalled");
284 }
285 }
286 }
287
288
289 if(JNIHistogram == NULL)
290 JNIHistogram = new Histogram("JNI Call Counts",100);
291
292 JNIHistogram->add_element(this);
293 Atomic::dec(&JNIHistogram_lock);
294 }
295
296 #define JNICountWrapper(arg) \
297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
299 if (e != NULL) e->increment_count()
300 #define JNIWrapper(arg) JNICountWrapper(arg);
301 #else
302 #define JNIWrapper(arg)
303 #endif
304
305
306 // Implementation of JNI entries
307
308 DT_RETURN_MARK_DECL(DefineClass, jclass
309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
312 const jbyte *buf, jsize bufLen))
313 JNIWrapper("DefineClass");
314
315 HOTSPOT_JNI_DEFINECLASS_ENTRY(
316 env, (char*) name, loaderRef, (char*) buf, bufLen);
317
318 jclass cls = NULL;
319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
320
321 TempNewSymbol class_name = NULL;
322 // Since exceptions can be thrown, class initialization can take place
323 // if name is NULL no check for class name in .class stream has to be made.
324 if (name != NULL) {
325 const int str_len = (int)strlen(name);
326 if (str_len > Symbol::max_length()) {
327 // It's impossible to create this class; the name cannot fit
328 // into the constant pool.
329 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
330 }
331 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
332 }
333 ResourceMark rm(THREAD);
334 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
335 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
336
337 if (UsePerfData && !class_loader.is_null()) {
338 // check whether the current caller thread holds the lock or not.
339 // If not, increment the corresponding counter
340 if (ObjectSynchronizer::
341 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
342 ObjectSynchronizer::owner_self) {
343 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
344 }
345 }
346 Klass* k = SystemDictionary::resolve_from_stream(class_name,
347 class_loader,
348 Handle(),
349 &st,
350 CHECK_NULL);
351
352 if (log_is_enabled(Info, classresolve) && k != NULL) {
353 trace_class_resolution(k);
354 }
355
356 cls = (jclass)JNIHandles::make_local(
357 env, k->java_mirror());
358 return cls;
359 JNI_END
360
361
362
363 static bool first_time_FindClass = true;
364
365 DT_RETURN_MARK_DECL(FindClass, jclass
366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
367
368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
369 JNIWrapper("FindClass");
370
371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
372
373 jclass result = NULL;
374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
375
376 // Remember if we are the first invocation of jni_FindClass
377 bool first_time = first_time_FindClass;
378 first_time_FindClass = false;
379
380 // Sanity check the name: it cannot be null or larger than the maximum size
381 // name we can fit in the constant pool.
382 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
383 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
384 }
385
386 //%note jni_3
387 Handle loader;
388 Handle protection_domain;
389 // Find calling class
390 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
391 if (k.not_null()) {
392 loader = Handle(THREAD, k->class_loader());
393 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
394 // in the correct class context.
395 if (loader.is_null() &&
396 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
397 JavaValue result(T_OBJECT);
398 JavaCalls::call_static(&result, k,
399 vmSymbols::getFromClass_name(),
400 vmSymbols::void_class_signature(),
401 thread);
402 if (HAS_PENDING_EXCEPTION) {
403 Handle ex(thread, thread->pending_exception());
404 CLEAR_PENDING_EXCEPTION;
405 THROW_HANDLE_0(ex);
406 }
407 oop mirror = (oop) result.get_jobject();
408 loader = Handle(THREAD,
409 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
410 protection_domain = Handle(THREAD,
411 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
412 }
413 } else {
414 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
415 loader = Handle(THREAD, SystemDictionary::java_system_loader());
416 }
417
418 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
419 result = find_class_from_class_loader(env, sym, true, loader,
420 protection_domain, true, thread);
421
422 if (log_is_enabled(Info, classresolve) && result != NULL) {
423 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
424 }
425
426 // If we were the first invocation of jni_FindClass, we enable compilation again
427 // rather than just allowing invocation counter to overflow and decay.
428 // Controlled by flag DelayCompilationDuringStartup.
429 if (first_time && !CompileTheWorld)
430 CompilationPolicy::completed_vm_startup();
431
432 return result;
433 JNI_END
434
435 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
436 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
437
438 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
439 JNIWrapper("FromReflectedMethod");
440
441 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
442
443 jmethodID ret = NULL;
444 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
445
446 // method is a handle to a java.lang.reflect.Method object
447 oop reflected = JNIHandles::resolve_non_null(method);
448 oop mirror = NULL;
449 int slot = 0;
450
451 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
452 mirror = java_lang_reflect_Constructor::clazz(reflected);
453 slot = java_lang_reflect_Constructor::slot(reflected);
454 } else {
455 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
456 mirror = java_lang_reflect_Method::clazz(reflected);
457 slot = java_lang_reflect_Method::slot(reflected);
458 }
459 Klass* k = java_lang_Class::as_Klass(mirror);
460
461 KlassHandle k1(THREAD, k);
462 // Make sure class is initialized before handing id's out to methods
463 k1()->initialize(CHECK_NULL);
464 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
465 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
466 return ret;
467 JNI_END
468
469 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
470 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
471
472 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
473 JNIWrapper("FromReflectedField");
474
475 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
476
477 jfieldID ret = NULL;
478 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
479
480 // field is a handle to a java.lang.reflect.Field object
481 oop reflected = JNIHandles::resolve_non_null(field);
482 oop mirror = java_lang_reflect_Field::clazz(reflected);
483 Klass* k = java_lang_Class::as_Klass(mirror);
484 int slot = java_lang_reflect_Field::slot(reflected);
485 int modifiers = java_lang_reflect_Field::modifiers(reflected);
486
487 KlassHandle k1(THREAD, k);
488 // Make sure class is initialized before handing id's out to fields
489 k1()->initialize(CHECK_NULL);
490
491 // First check if this is a static field
492 if (modifiers & JVM_ACC_STATIC) {
493 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
494 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
495 assert(id != NULL, "corrupt Field object");
496 debug_only(id->set_is_static_field_id();)
497 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
498 ret = jfieldIDWorkaround::to_static_jfieldID(id);
499 return ret;
500 }
501
502 // The slot is the index of the field description in the field-array
503 // The jfieldID is the offset of the field within the object
504 // It may also have hash bits for k, if VerifyJNIFields is turned on.
505 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
506 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
507 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
508 return ret;
509 JNI_END
510
511
512 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
513 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
514
515 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
516 JNIWrapper("ToReflectedMethod");
517
518 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
519
520 jobject ret = NULL;
521 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
522
523 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
524 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
525 oop reflection_method;
526 if (m->is_initializer()) {
527 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
528 } else {
529 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
530 }
531 ret = JNIHandles::make_local(env, reflection_method);
532 return ret;
533 JNI_END
534
535 DT_RETURN_MARK_DECL(GetSuperclass, jclass
536 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
537
538 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
539 JNIWrapper("GetSuperclass");
540
541 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
542
543 jclass obj = NULL;
544 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
545
546 oop mirror = JNIHandles::resolve_non_null(sub);
547 // primitive classes return NULL
548 if (java_lang_Class::is_primitive(mirror)) return NULL;
549
550 // Rules of Class.getSuperClass as implemented by KLass::java_super:
551 // arrays return Object
552 // interfaces return NULL
553 // proper classes return Klass::super()
554 Klass* k = java_lang_Class::as_Klass(mirror);
555 if (k->is_interface()) return NULL;
556
557 // return mirror for superclass
558 Klass* super = k->java_super();
559 // super2 is the value computed by the compiler's getSuperClass intrinsic:
560 debug_only(Klass* super2 = ( k->is_array_klass()
561 ? SystemDictionary::Object_klass()
562 : k->super() ) );
563 assert(super == super2,
564 "java_super computation depends on interface, array, other super");
565 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
566 return obj;
567 JNI_END
568
569 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
570 JNIWrapper("IsSubclassOf");
571
572 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
573
574 oop sub_mirror = JNIHandles::resolve_non_null(sub);
575 oop super_mirror = JNIHandles::resolve_non_null(super);
576 if (java_lang_Class::is_primitive(sub_mirror) ||
577 java_lang_Class::is_primitive(super_mirror)) {
578 jboolean ret = (sub_mirror == super_mirror);
579
580 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
581 return ret;
582 }
583 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
584 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
585 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
586 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
587 JNI_TRUE : JNI_FALSE;
588
589 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
590 return ret;
591 JNI_END
592
593
594 DT_RETURN_MARK_DECL(Throw, jint
595 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
596
597 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
598 JNIWrapper("Throw");
599
600 HOTSPOT_JNI_THROW_ENTRY(env, obj);
601
602 jint ret = JNI_OK;
603 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
604
605 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
606 ShouldNotReachHere();
607 return 0; // Mute compiler.
608 JNI_END
609
610
611 DT_RETURN_MARK_DECL(ThrowNew, jint
612 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
613
614 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
615 JNIWrapper("ThrowNew");
616
617 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
618
619 jint ret = JNI_OK;
620 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
621
622 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
623 Symbol* name = k->name();
624 Handle class_loader (THREAD, k->class_loader());
625 Handle protection_domain (THREAD, k->protection_domain());
626 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
627 ShouldNotReachHere();
628 return 0; // Mute compiler.
629 JNI_END
630
631
632 // JNI functions only transform a pending async exception to a synchronous
633 // exception in ExceptionOccurred and ExceptionCheck calls, since
634 // delivering an async exception in other places won't change the native
635 // code's control flow and would be harmful when native code further calls
636 // JNI functions with a pending exception. Async exception is also checked
637 // during the call, so ExceptionOccurred/ExceptionCheck won't return
638 // false but deliver the async exception at the very end during
639 // state transition.
640
641 static void jni_check_async_exceptions(JavaThread *thread) {
642 assert(thread == Thread::current(), "must be itself");
643 thread->check_and_handle_async_exceptions();
644 }
645
646 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
647 JNIWrapper("ExceptionOccurred");
648
649 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
650
651 jni_check_async_exceptions(thread);
652 oop exception = thread->pending_exception();
653 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
654
655 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
656 return ret;
657 JNI_END
658
659
660 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
661 JNIWrapper("ExceptionDescribe");
662
663 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
664
665 if (thread->has_pending_exception()) {
666 Handle ex(thread, thread->pending_exception());
667 thread->clear_pending_exception();
668 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
669 // Don't print anything if we are being killed.
670 } else {
671 jio_fprintf(defaultStream::error_stream(), "Exception ");
672 if (thread != NULL && thread->threadObj() != NULL) {
673 ResourceMark rm(THREAD);
674 jio_fprintf(defaultStream::error_stream(),
675 "in thread \"%s\" ", thread->get_thread_name());
676 }
677 if (ex->is_a(SystemDictionary::Throwable_klass())) {
678 JavaValue result(T_VOID);
679 JavaCalls::call_virtual(&result,
680 ex,
681 KlassHandle(THREAD,
682 SystemDictionary::Throwable_klass()),
683 vmSymbols::printStackTrace_name(),
684 vmSymbols::void_method_signature(),
685 THREAD);
686 // If an exception is thrown in the call it gets thrown away. Not much
687 // we can do with it. The native code that calls this, does not check
688 // for the exception - hence, it might still be in the thread when DestroyVM gets
689 // called, potentially causing a few asserts to trigger - since no pending exception
690 // is expected.
691 CLEAR_PENDING_EXCEPTION;
692 } else {
693 ResourceMark rm(THREAD);
694 jio_fprintf(defaultStream::error_stream(),
695 ". Uncaught exception of type %s.",
696 ex->klass()->external_name());
697 }
698 }
699 }
700
701 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
702 JNI_END
703
704
705 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
706 JNIWrapper("ExceptionClear");
707
708 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
709
710 // The jni code might be using this API to clear java thrown exception.
711 // So just mark jvmti thread exception state as exception caught.
712 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
713 if (state != NULL && state->is_exception_detected()) {
714 state->set_exception_caught();
715 }
716 thread->clear_pending_exception();
717
718 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
719 JNI_END
720
721
722 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
723 JNIWrapper("FatalError");
724
725 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
726
727 tty->print_cr("FATAL ERROR in native method: %s", msg);
728 thread->print_stack();
729 os::abort(); // Dump core and abort
730 JNI_END
731
732
733 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
734 JNIWrapper("PushLocalFrame");
735
736 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
737
738 //%note jni_11
739 if (capacity < 0 ||
740 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
741 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
742 return JNI_ERR;
743 }
744 JNIHandleBlock* old_handles = thread->active_handles();
745 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
746 assert(new_handles != NULL, "should not be NULL");
747 new_handles->set_pop_frame_link(old_handles);
748 thread->set_active_handles(new_handles);
749 jint ret = JNI_OK;
750 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
751 return ret;
752 JNI_END
753
754
755 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
756 JNIWrapper("PopLocalFrame");
757
758 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
759
760 //%note jni_11
761 Handle result_handle(thread, JNIHandles::resolve(result));
762 JNIHandleBlock* old_handles = thread->active_handles();
763 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
764 if (new_handles != NULL) {
765 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
766 // This way code will still work if PopLocalFrame is called without a corresponding
767 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
768 // the release_block call will release the blocks.
769 thread->set_active_handles(new_handles);
770 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
771 JNIHandleBlock::release_block(old_handles, thread); // may block
772 result = JNIHandles::make_local(thread, result_handle());
773 }
774 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
775 return result;
776 JNI_END
777
778
779 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
780 JNIWrapper("NewGlobalRef");
781
782 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
783
784 Handle ref_handle(thread, JNIHandles::resolve(ref));
785 jobject ret = JNIHandles::make_global(ref_handle);
786
787 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
788 return ret;
789 JNI_END
790
791 // Must be JNI_ENTRY (with HandleMark)
792 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
793 JNIWrapper("DeleteGlobalRef");
794
795 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
796
797 JNIHandles::destroy_global(ref);
798
799 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
800 JNI_END
801
802 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
803 JNIWrapper("DeleteLocalRef");
804
805 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
806
807 JNIHandles::destroy_local(obj);
808
809 HOTSPOT_JNI_DELETELOCALREF_RETURN();
810 JNI_END
811
812 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
813 JNIWrapper("IsSameObject");
814
815 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
816
817 oop a = JNIHandles::resolve(r1);
818 oop b = JNIHandles::resolve(r2);
819 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
820
821 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
822 return ret;
823 JNI_END
824
825
826 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
827 JNIWrapper("NewLocalRef");
828
829 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
830
831 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
832
833 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
834 return ret;
835 JNI_END
836
837 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
838 JNIWrapper("EnsureLocalCapacity");
839
840 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
841
842 jint ret;
843 if (capacity >= 0 &&
844 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
845 ret = JNI_OK;
846 } else {
847 ret = JNI_ERR;
848 }
849
850 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
851 return ret;
852 JNI_END
853
854 // Return the Handle Type
855 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
856 JNIWrapper("GetObjectRefType");
857
858 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
859
860 jobjectRefType ret;
861 if (JNIHandles::is_local_handle(thread, obj) ||
862 JNIHandles::is_frame_handle(thread, obj))
863 ret = JNILocalRefType;
864 else if (JNIHandles::is_global_handle(obj))
865 ret = JNIGlobalRefType;
866 else if (JNIHandles::is_weak_global_handle(obj))
867 ret = JNIWeakGlobalRefType;
868 else
869 ret = JNIInvalidRefType;
870
871 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
872 return ret;
873 JNI_END
874
875
876 class JNI_ArgumentPusher : public SignatureIterator {
877 protected:
878 JavaCallArguments* _arguments;
879
880 virtual void get_bool () = 0;
881 virtual void get_char () = 0;
882 virtual void get_short () = 0;
883 virtual void get_byte () = 0;
884 virtual void get_int () = 0;
885 virtual void get_long () = 0;
886 virtual void get_float () = 0;
887 virtual void get_double () = 0;
888 virtual void get_object () = 0;
889
890 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
891 this->_return_type = T_ILLEGAL;
892 _arguments = NULL;
893 }
894
895 public:
896 virtual void iterate( uint64_t fingerprint ) = 0;
897
898 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
899
900 inline void do_bool() { if (!is_return_type()) get_bool(); }
901 inline void do_char() { if (!is_return_type()) get_char(); }
902 inline void do_short() { if (!is_return_type()) get_short(); }
903 inline void do_byte() { if (!is_return_type()) get_byte(); }
904 inline void do_int() { if (!is_return_type()) get_int(); }
905 inline void do_long() { if (!is_return_type()) get_long(); }
906 inline void do_float() { if (!is_return_type()) get_float(); }
907 inline void do_double() { if (!is_return_type()) get_double(); }
908 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
909 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
910 inline void do_void() { }
911
912 JavaCallArguments* arguments() { return _arguments; }
913 void push_receiver(Handle h) { _arguments->push_oop(h); }
914 };
915
916
917 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
918 protected:
919 va_list _ap;
920
921 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
922 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
923 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
924 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
925 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
926
927 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
928
929 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
930 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
931 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
932 inline void get_object() { jobject l = va_arg(_ap, jobject);
933 _arguments->push_oop(Handle((oop *)l, false)); }
934
935 inline void set_ap(va_list rap) {
936 va_copy(_ap, rap);
937 }
938
939 public:
940 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
941 : JNI_ArgumentPusher(signature) {
942 set_ap(rap);
943 }
944 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
945 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
946 set_ap(rap);
947 }
948
949 // Optimized path if we have the bitvector form of signature
950 void iterate( uint64_t fingerprint ) {
951 if (fingerprint == (uint64_t)CONST64(-1)) {
952 SignatureIterator::iterate(); // Must be too many arguments
953 } else {
954 _return_type = (BasicType)((fingerprint >> static_feature_size) &
955 result_feature_mask);
956
957 assert(fingerprint, "Fingerprint should not be 0");
958 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
959 while ( 1 ) {
960 switch ( fingerprint & parameter_feature_mask ) {
961 case bool_parm:
962 case char_parm:
963 case short_parm:
964 case byte_parm:
965 case int_parm:
966 get_int();
967 break;
968 case obj_parm:
969 get_object();
970 break;
971 case long_parm:
972 get_long();
973 break;
974 case float_parm:
975 get_float();
976 break;
977 case double_parm:
978 get_double();
979 break;
980 case done_parm:
981 return;
982 break;
983 default:
984 ShouldNotReachHere();
985 break;
986 }
987 fingerprint >>= parameter_feature_size;
988 }
989 }
990 }
991 };
992
993
994 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
995 protected:
996 const jvalue *_ap;
997
998 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
999 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1000 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1001 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1002 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1003
1004 inline void get_long() { _arguments->push_long((_ap++)->j); }
1005 inline void get_float() { _arguments->push_float((_ap++)->f); }
1006 inline void get_double() { _arguments->push_double((_ap++)->d);}
1007 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1008
1009 inline void set_ap(const jvalue *rap) { _ap = rap; }
1010
1011 public:
1012 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1013 : JNI_ArgumentPusher(signature) {
1014 set_ap(rap);
1015 }
1016 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1017 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1018 set_ap(rap);
1019 }
1020
1021 // Optimized path if we have the bitvector form of signature
1022 void iterate( uint64_t fingerprint ) {
1023 if (fingerprint == (uint64_t)CONST64(-1)) {
1024 SignatureIterator::iterate(); // Must be too many arguments
1025 } else {
1026 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1027 result_feature_mask);
1028 assert(fingerprint, "Fingerprint should not be 0");
1029 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1030 while ( 1 ) {
1031 switch ( fingerprint & parameter_feature_mask ) {
1032 case bool_parm:
1033 get_bool();
1034 break;
1035 case char_parm:
1036 get_char();
1037 break;
1038 case short_parm:
1039 get_short();
1040 break;
1041 case byte_parm:
1042 get_byte();
1043 break;
1044 case int_parm:
1045 get_int();
1046 break;
1047 case obj_parm:
1048 get_object();
1049 break;
1050 case long_parm:
1051 get_long();
1052 break;
1053 case float_parm:
1054 get_float();
1055 break;
1056 case double_parm:
1057 get_double();
1058 break;
1059 case done_parm:
1060 return;
1061 break;
1062 default:
1063 ShouldNotReachHere();
1064 break;
1065 }
1066 fingerprint >>= parameter_feature_size;
1067 }
1068 }
1069 }
1070 };
1071
1072
1073 enum JNICallType {
1074 JNI_STATIC,
1075 JNI_VIRTUAL,
1076 JNI_NONVIRTUAL
1077 };
1078
1079
1080
1081 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1082 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1083
1084 // Create object to hold arguments for the JavaCall, and associate it with
1085 // the jni parser
1086 ResourceMark rm(THREAD);
1087 int number_of_parameters = method->size_of_parameters();
1088 JavaCallArguments java_args(number_of_parameters);
1089 args->set_java_argument_object(&java_args);
1090
1091 assert(method->is_static(), "method should be static");
1092
1093 // Fill out JavaCallArguments object
1094 args->iterate( Fingerprinter(method).fingerprint() );
1095 // Initialize result type
1096 result->set_type(args->get_ret_type());
1097
1098 // Invoke the method. Result is returned as oop.
1099 JavaCalls::call(result, method, &java_args, CHECK);
1100
1101 // Convert result
1102 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1103 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1104 }
1105 }
1106
1107
1108 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1109 oop recv = JNIHandles::resolve(receiver);
1110 if (recv == NULL) {
1111 THROW(vmSymbols::java_lang_NullPointerException());
1112 }
1113 Handle h_recv(THREAD, recv);
1114
1115 int number_of_parameters;
1116 Method* selected_method;
1117 {
1118 Method* m = Method::resolve_jmethod_id(method_id);
1119 number_of_parameters = m->size_of_parameters();
1120 Klass* holder = m->method_holder();
1121 if (call_type != JNI_VIRTUAL) {
1122 selected_method = m;
1123 } else if (!m->has_itable_index()) {
1124 // non-interface call -- for that little speed boost, don't handlize
1125 debug_only(NoSafepointVerifier nosafepoint;)
1126 // jni_GetMethodID makes sure class is linked and initialized
1127 // so m should have a valid vtable index.
1128 assert(m->valid_vtable_index(), "no valid vtable index");
1129 int vtbl_index = m->vtable_index();
1130 if (vtbl_index != Method::nonvirtual_vtable_index) {
1131 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1132 } else {
1133 // final method
1134 selected_method = m;
1135 }
1136 } else {
1137 // interface call
1138 KlassHandle h_holder(THREAD, holder);
1139
1140 int itbl_index = m->itable_index();
1141 Klass* k = h_recv->klass();
1142 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1143 }
1144 }
1145
1146 methodHandle method(THREAD, selected_method);
1147
1148 // Create object to hold arguments for the JavaCall, and associate it with
1149 // the jni parser
1150 ResourceMark rm(THREAD);
1151 JavaCallArguments java_args(number_of_parameters);
1152 args->set_java_argument_object(&java_args);
1153
1154 // handle arguments
1155 assert(!method->is_static(), "method should not be static");
1156 args->push_receiver(h_recv); // Push jobject handle
1157
1158 // Fill out JavaCallArguments object
1159 args->iterate( Fingerprinter(method).fingerprint() );
1160 // Initialize result type
1161 result->set_type(args->get_ret_type());
1162
1163 // Invoke the method. Result is returned as oop.
1164 JavaCalls::call(result, method, &java_args, CHECK);
1165
1166 // Convert result
1167 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1168 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1169 }
1170 }
1171
1172
1173 static instanceOop alloc_object(jclass clazz, TRAPS) {
1174 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1175 if (k == NULL) {
1176 ResourceMark rm(THREAD);
1177 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1178 }
1179 k()->check_valid_for_instantiation(false, CHECK_NULL);
1180 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1181 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1182 return ih;
1183 }
1184
1185 DT_RETURN_MARK_DECL(AllocObject, jobject
1186 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1187
1188 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1189 JNIWrapper("AllocObject");
1190
1191 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1192
1193 jobject ret = NULL;
1194 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1195
1196 instanceOop i = alloc_object(clazz, CHECK_NULL);
1197 ret = JNIHandles::make_local(env, i);
1198 return ret;
1199 JNI_END
1200
1201 DT_RETURN_MARK_DECL(NewObjectA, jobject
1202 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1203
1204 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1205 JNIWrapper("NewObjectA");
1206
1207 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1208
1209 jobject obj = NULL;
1210 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1211
1212 instanceOop i = alloc_object(clazz, CHECK_NULL);
1213 obj = JNIHandles::make_local(env, i);
1214 JavaValue jvalue(T_VOID);
1215 JNI_ArgumentPusherArray ap(methodID, args);
1216 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1217 return obj;
1218 JNI_END
1219
1220
1221 DT_RETURN_MARK_DECL(NewObjectV, jobject
1222 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1223
1224 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1225 JNIWrapper("NewObjectV");
1226
1227 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1228
1229 jobject obj = NULL;
1230 DT_RETURN_MARK(NewObjectV, 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_ArgumentPusherVaArg 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(NewObject, jobject
1242 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1243
1244 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1245 JNIWrapper("NewObject");
1246
1247 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1248
1249 jobject obj = NULL;
1250 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1251
1252 instanceOop i = alloc_object(clazz, CHECK_NULL);
1253 obj = JNIHandles::make_local(env, i);
1254 va_list args;
1255 va_start(args, methodID);
1256 JavaValue jvalue(T_VOID);
1257 JNI_ArgumentPusherVaArg ap(methodID, args);
1258 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1259 va_end(args);
1260 return obj;
1261 JNI_END
1262
1263
1264 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1265 JNIWrapper("GetObjectClass");
1266
1267 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1268
1269 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1270 jclass ret =
1271 (jclass) JNIHandles::make_local(env, k->java_mirror());
1272
1273 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1274 return ret;
1275 JNI_END
1276
1277 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1278 JNIWrapper("IsInstanceOf");
1279
1280 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1281
1282 jboolean ret = JNI_TRUE;
1283 if (obj != NULL) {
1284 ret = JNI_FALSE;
1285 Klass* k = java_lang_Class::as_Klass(
1286 JNIHandles::resolve_non_null(clazz));
1287 if (k != NULL) {
1288 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1289 }
1290 }
1291
1292 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1293 return ret;
1294 JNI_END
1295
1296
1297 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1298 const char *sig, bool is_static, TRAPS) {
1299 // %%%% This code should probably just call into a method in the LinkResolver
1300 //
1301 // The class should have been loaded (we have an instance of the class
1302 // passed in) so the method and signature should already be in the symbol
1303 // table. If they're not there, the method doesn't exist.
1304 const char *name_to_probe = (name_str == NULL)
1305 ? vmSymbols::object_initializer_name()->as_C_string()
1306 : name_str;
1307 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1308 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1309
1310 if (name == NULL || signature == NULL) {
1311 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1312 }
1313
1314 // Throw a NoSuchMethodError exception if we have an instance of a
1315 // primitive java.lang.Class
1316 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1317 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1318 }
1319
1320 KlassHandle klass(THREAD,
1321 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1322
1323 // Make sure class is linked and initialized before handing id's out to
1324 // Method*s.
1325 klass()->initialize(CHECK_NULL);
1326
1327 Method* m;
1328 if (name == vmSymbols::object_initializer_name() ||
1329 name == vmSymbols::class_initializer_name()) {
1330 // Never search superclasses for constructors
1331 if (klass->is_instance_klass()) {
1332 m = InstanceKlass::cast(klass())->find_method(name, signature);
1333 } else {
1334 m = NULL;
1335 }
1336 } else {
1337 m = klass->lookup_method(name, signature);
1338 if (m == NULL && klass->is_instance_klass()) {
1339 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1340 }
1341 }
1342 if (m == NULL || (m->is_static() != is_static)) {
1343 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1344 }
1345 return m->jmethod_id();
1346 }
1347
1348
1349 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1350 const char *name, const char *sig))
1351 JNIWrapper("GetMethodID");
1352 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1353 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1354 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1355 return ret;
1356 JNI_END
1357
1358
1359 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1360 const char *name, const char *sig))
1361 JNIWrapper("GetStaticMethodID");
1362 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1363 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1364 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1365 return ret;
1366 JNI_END
1367
1368
1369
1370 //
1371 // Calling Methods
1372 //
1373
1374
1375 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1376 , EntryProbe, ReturnProbe) \
1377 \
1378 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1379 , ReturnProbe); \
1380 \
1381 JNI_ENTRY(ResultType, \
1382 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1383 JNIWrapper("Call" XSTR(Result) "Method"); \
1384 \
1385 EntryProbe; \
1386 ResultType ret = 0;\
1387 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1388 (const ResultType&)ret);\
1389 \
1390 va_list args; \
1391 va_start(args, methodID); \
1392 JavaValue jvalue(Tag); \
1393 JNI_ArgumentPusherVaArg ap(methodID, args); \
1394 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1395 va_end(args); \
1396 ret = jvalue.get_##ResultType(); \
1397 return ret;\
1398 JNI_END
1399
1400 // the runtime type of subword integral basic types is integer
1401 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1402 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1403 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1404 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1405 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1407 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1408 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1411 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1413
1414 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1415 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1416 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1417 DEFINE_CALLMETHOD(jint, Int, T_INT,
1418 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1421 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1423 // Float and double probes don't return value because dtrace doesn't currently support it
1424 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1425 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1427 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1428 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1430
1431 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1432 , EntryProbe, ReturnProbe) \
1433 \
1434 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1435 , ReturnProbe); \
1436 \
1437 JNI_ENTRY(ResultType, \
1438 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1439 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1440 \
1441 EntryProbe;\
1442 ResultType ret = 0;\
1443 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1444 (const ResultType&)ret);\
1445 \
1446 JavaValue jvalue(Tag); \
1447 JNI_ArgumentPusherVaArg ap(methodID, args); \
1448 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1449 ret = jvalue.get_##ResultType(); \
1450 return ret;\
1451 JNI_END
1452
1453 // the runtime type of subword integral basic types is integer
1454 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1455 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1457 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1458 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1461 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1464 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1466
1467 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1468 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1469 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1470 DEFINE_CALLMETHODV(jint, Int, T_INT,
1471 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1473 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1474 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1476 // Float and double probes don't return value because dtrace doesn't currently support it
1477 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1478 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1480 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1481 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1483
1484 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1485 , EntryProbe, ReturnProbe) \
1486 \
1487 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1488 , ReturnProbe); \
1489 \
1490 JNI_ENTRY(ResultType, \
1491 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1492 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1493 EntryProbe; \
1494 ResultType ret = 0;\
1495 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1496 (const ResultType&)ret);\
1497 \
1498 JavaValue jvalue(Tag); \
1499 JNI_ArgumentPusherArray ap(methodID, args); \
1500 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1501 ret = jvalue.get_##ResultType(); \
1502 return ret;\
1503 JNI_END
1504
1505 // the runtime type of subword integral basic types is integer
1506 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1507 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1508 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1509 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1510 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1513 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1516 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1518
1519 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1520 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1521 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1522 DEFINE_CALLMETHODA(jint, Int, T_INT,
1523 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1525 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1526 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1528 // Float and double probes don't return value because dtrace doesn't currently support it
1529 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1530 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1532 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1533 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1535
1536 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1537 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1538 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1539
1540
1541 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1542 JNIWrapper("CallVoidMethod");
1543 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1544 DT_VOID_RETURN_MARK(CallVoidMethod);
1545
1546 va_list args;
1547 va_start(args, methodID);
1548 JavaValue jvalue(T_VOID);
1549 JNI_ArgumentPusherVaArg ap(methodID, args);
1550 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1551 va_end(args);
1552 JNI_END
1553
1554
1555 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1556 JNIWrapper("CallVoidMethodV");
1557 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1558 DT_VOID_RETURN_MARK(CallVoidMethodV);
1559
1560 JavaValue jvalue(T_VOID);
1561 JNI_ArgumentPusherVaArg ap(methodID, args);
1562 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1563 JNI_END
1564
1565
1566 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1567 JNIWrapper("CallVoidMethodA");
1568 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1569 DT_VOID_RETURN_MARK(CallVoidMethodA);
1570
1571 JavaValue jvalue(T_VOID);
1572 JNI_ArgumentPusherArray ap(methodID, args);
1573 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1574 JNI_END
1575
1576
1577
1578 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1579 , EntryProbe, ReturnProbe) \
1580 \
1581 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1582 , ReturnProbe);\
1583 \
1584 JNI_ENTRY(ResultType, \
1585 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1586 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1587 \
1588 EntryProbe;\
1589 ResultType ret;\
1590 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1591 (const ResultType&)ret);\
1592 \
1593 va_list args; \
1594 va_start(args, methodID); \
1595 JavaValue jvalue(Tag); \
1596 JNI_ArgumentPusherVaArg ap(methodID, args); \
1597 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1598 va_end(args); \
1599 ret = jvalue.get_##ResultType(); \
1600 return ret;\
1601 JNI_END
1602
1603 // the runtime type of subword integral basic types is integer
1604 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1605 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1606 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1607 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1608 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1610 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1611 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1613 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1614 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1616
1617 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1618 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1619 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1620 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1621 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1623 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1624 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 // Float and double probes don't return value because dtrace doesn't currently support it
1626 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1628 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1630 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1631 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1633
1634 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1635 , EntryProbe, ReturnProbe) \
1636 \
1637 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1638 , ReturnProbe);\
1639 \
1640 JNI_ENTRY(ResultType, \
1641 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1642 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1643 \
1644 EntryProbe;\
1645 ResultType ret;\
1646 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1647 (const ResultType&)ret);\
1648 \
1649 JavaValue jvalue(Tag); \
1650 JNI_ArgumentPusherVaArg ap(methodID, args); \
1651 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1652 ret = jvalue.get_##ResultType(); \
1653 return ret;\
1654 JNI_END
1655
1656 // the runtime type of subword integral basic types is integer
1657 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1658 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1660 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1661 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1663 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1664 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1666 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1667 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1669
1670 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1671 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1672 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1673 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1674 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1676 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1677 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 // Float and double probes don't return value because dtrace doesn't currently support it
1679 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1681 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1683 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1684 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1686
1687 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1688 , EntryProbe, ReturnProbe) \
1689 \
1690 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1691 , ReturnProbe);\
1692 \
1693 JNI_ENTRY(ResultType, \
1694 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1695 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1696 \
1697 EntryProbe;\
1698 ResultType ret;\
1699 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1700 (const ResultType&)ret);\
1701 \
1702 JavaValue jvalue(Tag); \
1703 JNI_ArgumentPusherArray ap(methodID, args); \
1704 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1705 ret = jvalue.get_##ResultType(); \
1706 return ret;\
1707 JNI_END
1708
1709 // the runtime type of subword integral basic types is integer
1710 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1711 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1712 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1713 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1714 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1716 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1717 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1719 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1720 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1722
1723 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1724 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1725 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1726 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1727 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1729 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1730 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 // Float and double probes don't return value because dtrace doesn't currently support it
1732 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1734 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1736 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1737 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1739
1740 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1741 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1742 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1743 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1744 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1745 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1746
1747 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1748 JNIWrapper("CallNonvirtualVoidMethod");
1749
1750 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1751 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1752
1753 va_list args;
1754 va_start(args, methodID);
1755 JavaValue jvalue(T_VOID);
1756 JNI_ArgumentPusherVaArg ap(methodID, args);
1757 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1758 va_end(args);
1759 JNI_END
1760
1761
1762 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1763 JNIWrapper("CallNonvirtualVoidMethodV");
1764
1765 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1766 env, obj, cls, (uintptr_t) methodID);
1767 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1768
1769 JavaValue jvalue(T_VOID);
1770 JNI_ArgumentPusherVaArg ap(methodID, args);
1771 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1772 JNI_END
1773
1774
1775 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1776 JNIWrapper("CallNonvirtualVoidMethodA");
1777 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1778 env, obj, cls, (uintptr_t) methodID);
1779 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1780 JavaValue jvalue(T_VOID);
1781 JNI_ArgumentPusherArray ap(methodID, args);
1782 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1783 JNI_END
1784
1785
1786
1787 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1788 , EntryProbe, ResultProbe) \
1789 \
1790 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1791 , ResultProbe); \
1792 \
1793 JNI_ENTRY(ResultType, \
1794 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1795 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1796 \
1797 EntryProbe; \
1798 ResultType ret = 0;\
1799 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1800 (const ResultType&)ret);\
1801 \
1802 va_list args; \
1803 va_start(args, methodID); \
1804 JavaValue jvalue(Tag); \
1805 JNI_ArgumentPusherVaArg ap(methodID, args); \
1806 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1807 va_end(args); \
1808 ret = jvalue.get_##ResultType(); \
1809 return ret;\
1810 JNI_END
1811
1812 // the runtime type of subword integral basic types is integer
1813 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1814 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1815 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1816 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1817 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1818 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1819 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1820 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1823 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1825
1826 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1827 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1828 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1829 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1830 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1832 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1833 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1835 // Float and double probes don't return value because dtrace doesn't currently support it
1836 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1837 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1839 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1840 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1842
1843 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1844 , EntryProbe, ResultProbe) \
1845 \
1846 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1847 , ResultProbe); \
1848 \
1849 JNI_ENTRY(ResultType, \
1850 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1851 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1852 \
1853 EntryProbe; \
1854 ResultType ret = 0;\
1855 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1856 (const ResultType&)ret);\
1857 \
1858 JavaValue jvalue(Tag); \
1859 JNI_ArgumentPusherVaArg ap(methodID, args); \
1860 /* Make sure class is initialized before trying to invoke its method */ \
1861 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1862 k()->initialize(CHECK_0); \
1863 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1864 va_end(args); \
1865 ret = jvalue.get_##ResultType(); \
1866 return ret;\
1867 JNI_END
1868
1869 // the runtime type of subword integral basic types is integer
1870 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1871 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1872 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1873 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1874 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1875 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1876 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1877 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1880 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1882
1883 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1884 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1885 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1886 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1887 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1889 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1890 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1892 // Float and double probes don't return value because dtrace doesn't currently support it
1893 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1894 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1896 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1897 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1899
1900 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1901 , EntryProbe, ResultProbe) \
1902 \
1903 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1904 , ResultProbe); \
1905 \
1906 JNI_ENTRY(ResultType, \
1907 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1908 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1909 \
1910 EntryProbe; \
1911 ResultType ret = 0;\
1912 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1913 (const ResultType&)ret);\
1914 \
1915 JavaValue jvalue(Tag); \
1916 JNI_ArgumentPusherArray ap(methodID, args); \
1917 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1918 ret = jvalue.get_##ResultType(); \
1919 return ret;\
1920 JNI_END
1921
1922 // the runtime type of subword integral basic types is integer
1923 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1924 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1925 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1926 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1927 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1928 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1929 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1930 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1932 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1933 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1934 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1935
1936 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1937 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1938 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1939 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1940 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1942 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1943 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1945 // Float and double probes don't return value because dtrace doesn't currently support it
1946 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1947 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1949 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1950 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1952
1953 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1954 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1955 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1956 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1957 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1958 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1959
1960 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1961 JNIWrapper("CallStaticVoidMethod");
1962 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1963 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1964
1965 va_list args;
1966 va_start(args, methodID);
1967 JavaValue jvalue(T_VOID);
1968 JNI_ArgumentPusherVaArg ap(methodID, args);
1969 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1970 va_end(args);
1971 JNI_END
1972
1973
1974 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1975 JNIWrapper("CallStaticVoidMethodV");
1976 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1977 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1978
1979 JavaValue jvalue(T_VOID);
1980 JNI_ArgumentPusherVaArg ap(methodID, args);
1981 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1982 JNI_END
1983
1984
1985 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1986 JNIWrapper("CallStaticVoidMethodA");
1987 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1988 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1989
1990 JavaValue jvalue(T_VOID);
1991 JNI_ArgumentPusherArray ap(methodID, args);
1992 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1993 JNI_END
1994
1995
1996 //
1997 // Accessing Fields
1998 //
1999
2000
2001 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2002 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2003
2004 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2005 const char *name, const char *sig))
2006 JNIWrapper("GetFieldID");
2007 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2008 jfieldID ret = 0;
2009 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2010
2011 // The class should have been loaded (we have an instance of the class
2012 // passed in) so the field and signature should already be in the symbol
2013 // table. If they're not there, the field doesn't exist.
2014 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2015 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2016 if (fieldname == NULL || signame == NULL) {
2017 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2018 }
2019 KlassHandle k(THREAD,
2020 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2021 // Make sure class is initialized before handing id's out to fields
2022 k()->initialize(CHECK_NULL);
2023
2024 fieldDescriptor fd;
2025 if (!k()->is_instance_klass() ||
2026 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2027 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2028 }
2029
2030 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2031 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2032 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2033 return ret;
2034 JNI_END
2035
2036
2037 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2038 JNIWrapper("GetObjectField");
2039 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2040 oop o = JNIHandles::resolve_non_null(obj);
2041 Klass* k = o->klass();
2042 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2043 // Keep JVMTI addition small and only check enabled flag here.
2044 // jni_GetField_probe() assumes that is okay to create handles.
2045 if (JvmtiExport::should_post_field_access()) {
2046 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2047 }
2048 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2049 #if INCLUDE_ALL_GCS
2050 // If G1 is enabled and we are accessing the value of the referent
2051 // field in a reference object then we need to register a non-null
2052 // referent with the SATB barrier.
2053 if (UseG1GC) {
2054 bool needs_barrier = false;
2055
2056 if (ret != NULL &&
2057 offset == java_lang_ref_Reference::referent_offset &&
2058 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2059 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2060 needs_barrier = true;
2061 }
2062
2063 if (needs_barrier) {
2064 oop referent = JNIHandles::resolve(ret);
2065 SATBMarkQueue::enqueue(referent);
2066 }
2067 }
2068 #endif // INCLUDE_ALL_GCS
2069 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2070 return ret;
2071 JNI_END
2072
2073
2074
2075 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2076 , EntryProbe, ReturnProbe) \
2077 \
2078 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2079 , ReturnProbe); \
2080 \
2081 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2082 JNIWrapper("Get" XSTR(Result) "Field"); \
2083 \
2084 EntryProbe; \
2085 Return ret = 0;\
2086 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2087 \
2088 oop o = JNIHandles::resolve_non_null(obj); \
2089 Klass* k = o->klass(); \
2090 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2091 /* Keep JVMTI addition small and only check enabled flag here. */ \
2092 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2093 /* and creates a ResetNoHandleMark. */ \
2094 if (JvmtiExport::should_post_field_access()) { \
2095 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2096 } \
2097 ret = o->Fieldname##_field(offset); \
2098 return ret; \
2099 JNI_END
2100
2101 DEFINE_GETFIELD(jboolean, bool, Boolean
2102 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2103 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2104 DEFINE_GETFIELD(jbyte, byte, Byte
2105 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2106 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2107 DEFINE_GETFIELD(jchar, char, Char
2108 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2109 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2110 DEFINE_GETFIELD(jshort, short, Short
2111 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2113 DEFINE_GETFIELD(jint, int, Int
2114 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2116 DEFINE_GETFIELD(jlong, long, Long
2117 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2118 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2119 // Float and double probes don't return value because dtrace doesn't currently support it
2120 DEFINE_GETFIELD(jfloat, float, Float
2121 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2123 DEFINE_GETFIELD(jdouble, double, Double
2124 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2126
2127 address jni_GetBooleanField_addr() {
2128 return (address)jni_GetBooleanField;
2129 }
2130 address jni_GetByteField_addr() {
2131 return (address)jni_GetByteField;
2132 }
2133 address jni_GetCharField_addr() {
2134 return (address)jni_GetCharField;
2135 }
2136 address jni_GetShortField_addr() {
2137 return (address)jni_GetShortField;
2138 }
2139 address jni_GetIntField_addr() {
2140 return (address)jni_GetIntField;
2141 }
2142 address jni_GetLongField_addr() {
2143 return (address)jni_GetLongField;
2144 }
2145 address jni_GetFloatField_addr() {
2146 return (address)jni_GetFloatField;
2147 }
2148 address jni_GetDoubleField_addr() {
2149 return (address)jni_GetDoubleField;
2150 }
2151
2152 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2153 JNIWrapper("SetObjectField");
2154 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2155 oop o = JNIHandles::resolve_non_null(obj);
2156 Klass* k = o->klass();
2157 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2158 // Keep JVMTI addition small and only check enabled flag here.
2159 // jni_SetField_probe_nh() assumes that is not okay to create handles
2160 // and creates a ResetNoHandleMark.
2161 if (JvmtiExport::should_post_field_modification()) {
2162 jvalue field_value;
2163 field_value.l = value;
2164 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2165 }
2166 o->obj_field_put(offset, JNIHandles::resolve(value));
2167 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2168 JNI_END
2169
2170
2171 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2172 , EntryProbe, ReturnProbe) \
2173 \
2174 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2175 JNIWrapper("Set" XSTR(Result) "Field"); \
2176 \
2177 EntryProbe; \
2178 \
2179 oop o = JNIHandles::resolve_non_null(obj); \
2180 Klass* k = o->klass(); \
2181 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2182 /* Keep JVMTI addition small and only check enabled flag here. */ \
2183 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2184 /* and creates a ResetNoHandleMark. */ \
2185 if (JvmtiExport::should_post_field_modification()) { \
2186 jvalue field_value; \
2187 field_value.unionType = value; \
2188 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2189 } \
2190 o->Fieldname##_field_put(offset, value); \
2191 ReturnProbe; \
2192 JNI_END
2193
2194 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2195 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2196 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2197 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2198 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2200 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2201 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2203 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2204 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2206 DEFINE_SETFIELD(jint, int, Int, 'I', i
2207 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETINTFIELD_RETURN())
2209 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2210 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2212 // Float and double probes don't return value because dtrace doesn't currently support it
2213 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2214 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2215 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2216 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2217 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2218 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2219
2220 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2221 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2222
2223 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2224 JNIWrapper("ToReflectedField");
2225 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2226 jobject ret = NULL;
2227 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2228
2229 fieldDescriptor fd;
2230 bool found = false;
2231 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2232
2233 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2234
2235 if (isStatic) {
2236 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2237 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2238 assert(id->is_static_field_id(), "invalid static field id");
2239 found = id->find_local_field(&fd);
2240 } else {
2241 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2242 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2243 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2244 }
2245 assert(found, "bad fieldID passed into jni_ToReflectedField");
2246 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2247 ret = JNIHandles::make_local(env, reflected);
2248 return ret;
2249 JNI_END
2250
2251
2252 //
2253 // Accessing Static Fields
2254 //
2255 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2256 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2257
2258 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2259 const char *name, const char *sig))
2260 JNIWrapper("GetStaticFieldID");
2261 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2262 jfieldID ret = NULL;
2263 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2264
2265 // The class should have been loaded (we have an instance of the class
2266 // passed in) so the field and signature should already be in the symbol
2267 // table. If they're not there, the field doesn't exist.
2268 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2269 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2270 if (fieldname == NULL || signame == NULL) {
2271 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2272 }
2273 KlassHandle k(THREAD,
2274 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2275 // Make sure class is initialized before handing id's out to static fields
2276 k()->initialize(CHECK_NULL);
2277
2278 fieldDescriptor fd;
2279 if (!k()->is_instance_klass() ||
2280 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2281 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2282 }
2283
2284 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2285 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2286 debug_only(id->set_is_static_field_id();)
2287
2288 debug_only(id->verify(fd.field_holder()));
2289
2290 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2291 return ret;
2292 JNI_END
2293
2294
2295 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2296 JNIWrapper("GetStaticObjectField");
2297 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2298 #if INCLUDE_JNI_CHECK
2299 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2300 #endif // INCLUDE_JNI_CHECK
2301 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2302 assert(id->is_static_field_id(), "invalid static field id");
2303 // Keep JVMTI addition small and only check enabled flag here.
2304 // jni_GetField_probe() assumes that is okay to create handles.
2305 if (JvmtiExport::should_post_field_access()) {
2306 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2307 }
2308 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2309 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2310 return ret;
2311 JNI_END
2312
2313
2314 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2315 , EntryProbe, ReturnProbe) \
2316 \
2317 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2318 , ReturnProbe); \
2319 \
2320 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2321 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2322 EntryProbe; \
2323 Return ret = 0;\
2324 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2325 (const Return&)ret);\
2326 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2327 assert(id->is_static_field_id(), "invalid static field id"); \
2328 /* Keep JVMTI addition small and only check enabled flag here. */ \
2329 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2330 if (JvmtiExport::should_post_field_access()) { \
2331 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2332 } \
2333 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2334 return ret;\
2335 JNI_END
2336
2337 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2338 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2339 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2340 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2341 DEFINE_GETSTATICFIELD(jchar, char, Char
2342 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2343 DEFINE_GETSTATICFIELD(jshort, short, Short
2344 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2345 DEFINE_GETSTATICFIELD(jint, int, Int
2346 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2347 DEFINE_GETSTATICFIELD(jlong, long, Long
2348 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2349 // Float and double probes don't return value because dtrace doesn't currently support it
2350 DEFINE_GETSTATICFIELD(jfloat, float, Float
2351 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2352 DEFINE_GETSTATICFIELD(jdouble, double, Double
2353 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2354
2355 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2356 JNIWrapper("SetStaticObjectField");
2357 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2358 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2359 assert(id->is_static_field_id(), "invalid static field id");
2360 // Keep JVMTI addition small and only check enabled flag here.
2361 // jni_SetField_probe() assumes that is okay to create handles.
2362 if (JvmtiExport::should_post_field_modification()) {
2363 jvalue field_value;
2364 field_value.l = value;
2365 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2366 }
2367 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2368 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2369 JNI_END
2370
2371
2372
2373 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2374 , EntryProbe, ReturnProbe) \
2375 \
2376 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2377 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2378 EntryProbe; \
2379 \
2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2381 assert(id->is_static_field_id(), "invalid static field id"); \
2382 /* Keep JVMTI addition small and only check enabled flag here. */ \
2383 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2384 if (JvmtiExport::should_post_field_modification()) { \
2385 jvalue field_value; \
2386 field_value.unionType = value; \
2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2388 } \
2389 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2390 ReturnProbe;\
2391 JNI_END
2392
2393 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2394 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2395 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2396 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2397 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2398 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2400 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2403 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2406 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2409 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2411 // Float and double probes don't return value because dtrace doesn't currently support it
2412 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2413 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2414 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2415 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2416 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2417 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2418
2419 //
2420 // String Operations
2421 //
2422
2423 // Unicode Interface
2424
2425 DT_RETURN_MARK_DECL(NewString, jstring
2426 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2427
2428 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2429 JNIWrapper("NewString");
2430 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2431 jstring ret = NULL;
2432 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2433 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2434 ret = (jstring) JNIHandles::make_local(env, string);
2435 return ret;
2436 JNI_END
2437
2438
2439 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2440 JNIWrapper("GetStringLength");
2441 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2442 jsize ret = 0;
2443 oop s = JNIHandles::resolve_non_null(string);
2444 if (java_lang_String::value(s) != NULL) {
2445 ret = java_lang_String::length(s);
2446 }
2447 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2448 return ret;
2449 JNI_END
2450
2451
2452 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2453 JNIEnv *env, jstring string, jboolean *isCopy))
2454 JNIWrapper("GetStringChars");
2455 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2456 jchar* buf = NULL;
2457 oop s = JNIHandles::resolve_non_null(string);
2458 typeArrayOop s_value = java_lang_String::value(s);
2459 if (s_value != NULL) {
2460 int s_len = java_lang_String::length(s);
2461 bool is_latin1 = java_lang_String::is_latin1(s);
2462 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2463 /* JNI Specification states return NULL on OOM */
2464 if (buf != NULL) {
2465 if (s_len > 0) {
2466 if (!is_latin1) {
2467 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2468 } else {
2469 for (int i = 0; i < s_len; i++) {
2470 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2471 }
2472 }
2473 }
2474 buf[s_len] = 0;
2475 //%note jni_5
2476 if (isCopy != NULL) {
2477 *isCopy = JNI_TRUE;
2478 }
2479 }
2480 }
2481 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2482 return buf;
2483 JNI_END
2484
2485
2486 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2487 JNIWrapper("ReleaseStringChars");
2488 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2489 //%note jni_6
2490 if (chars != NULL) {
2491 // Since String objects are supposed to be immutable, don't copy any
2492 // new data back. A bad user will have to go after the char array.
2493 FreeHeap((void*) chars);
2494 }
2495 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2496 JNI_END
2497
2498
2499 // UTF Interface
2500
2501 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2502 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2503
2504 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2505 JNIWrapper("NewStringUTF");
2506 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2507 jstring ret;
2508 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2509
2510 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2511 ret = (jstring) JNIHandles::make_local(env, result);
2512 return ret;
2513 JNI_END
2514
2515
2516 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2517 JNIWrapper("GetStringUTFLength");
2518 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2519 jsize ret = 0;
2520 oop java_string = JNIHandles::resolve_non_null(string);
2521 if (java_lang_String::value(java_string) != NULL) {
2522 ret = java_lang_String::utf8_length(java_string);
2523 }
2524 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2525 return ret;
2526 JNI_END
2527
2528
2529 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2530 JNIWrapper("GetStringUTFChars");
2531 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2532 char* result = NULL;
2533 oop java_string = JNIHandles::resolve_non_null(string);
2534 if (java_lang_String::value(java_string) != NULL) {
2535 size_t length = java_lang_String::utf8_length(java_string);
2536 /* JNI Specification states return NULL on OOM */
2537 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2538 if (result != NULL) {
2539 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2540 if (isCopy != NULL) {
2541 *isCopy = JNI_TRUE;
2542 }
2543 }
2544 }
2545 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2546 return result;
2547 JNI_END
2548
2549
2550 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2551 JNIWrapper("ReleaseStringUTFChars");
2552 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2553 if (chars != NULL) {
2554 FreeHeap((char*) chars);
2555 }
2556 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2557 JNI_END
2558
2559
2560 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2561 JNIWrapper("GetArrayLength");
2562 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2563 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2564 assert(a->is_array(), "must be array");
2565 jsize ret = a->length();
2566 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2567 return ret;
2568 JNI_END
2569
2570
2571 //
2572 // Object Array Operations
2573 //
2574
2575 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2576 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2577
2578 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2579 JNIWrapper("NewObjectArray");
2580 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2581 jobjectArray ret = NULL;
2582 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2583 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2584 Klass* ako = ek()->array_klass(CHECK_NULL);
2585 KlassHandle ak = KlassHandle(THREAD, ako);
2586 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2587 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2588 oop initial_value = JNIHandles::resolve(initialElement);
2589 if (initial_value != NULL) { // array already initialized with NULL
2590 for (int index = 0; index < length; index++) {
2591 result->obj_at_put(index, initial_value);
2592 }
2593 }
2594 ret = (jobjectArray) JNIHandles::make_local(env, result);
2595 return ret;
2596 JNI_END
2597
2598 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2599 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2600
2601 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2602 JNIWrapper("GetObjectArrayElement");
2603 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2604 jobject ret = NULL;
2605 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2606 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2607 if (a->is_within_bounds(index)) {
2608 ret = JNIHandles::make_local(env, a->obj_at(index));
2609 return ret;
2610 } else {
2611 char buf[jintAsStringSize];
2612 sprintf(buf, "%d", index);
2613 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2614 }
2615 JNI_END
2616
2617 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2618 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2619
2620 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2621 JNIWrapper("SetObjectArrayElement");
2622 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2623 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2624
2625 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2626 oop v = JNIHandles::resolve(value);
2627 if (a->is_within_bounds(index)) {
2628 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2629 a->obj_at_put(index, v);
2630 } else {
2631 THROW(vmSymbols::java_lang_ArrayStoreException());
2632 }
2633 } else {
2634 char buf[jintAsStringSize];
2635 sprintf(buf, "%d", index);
2636 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2637 }
2638 JNI_END
2639
2640
2641
2642 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2643 ,EntryProbe,ReturnProbe) \
2644 \
2645 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2646 , ReturnProbe); \
2647 \
2648 JNI_ENTRY(Return, \
2649 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2650 JNIWrapper("New" XSTR(Result) "Array"); \
2651 EntryProbe; \
2652 Return ret = NULL;\
2653 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2654 \
2655 oop obj= oopFactory::Allocator(len, CHECK_0); \
2656 ret = (Return) JNIHandles::make_local(env, obj); \
2657 return ret;\
2658 JNI_END
2659
2660 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2661 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2662 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2663 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2664 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2665 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2666 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2667 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2668 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2669 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2670 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2671 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2672 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2673 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2674 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2676 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2677 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2679 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2680 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2681 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2682 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2683 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2684
2685 // Return an address which will fault if the caller writes to it.
2686
2687 static char* get_bad_address() {
2688 static char* bad_address = NULL;
2689 if (bad_address == NULL) {
2690 size_t size = os::vm_allocation_granularity();
2691 bad_address = os::reserve_memory(size);
2692 if (bad_address != NULL) {
2693 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2694 /*is_committed*/false);
2695 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2696 }
2697 }
2698 return bad_address;
2699 }
2700
2701
2702
2703 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2704 , EntryProbe, ReturnProbe) \
2705 \
2706 JNI_QUICK_ENTRY(ElementType*, \
2707 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2708 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2709 EntryProbe; \
2710 /* allocate an chunk of memory in c land */ \
2711 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2712 ElementType* result; \
2713 int len = a->length(); \
2714 if (len == 0) { \
2715 /* Empty array: legal but useless, can't return NULL. \
2716 * Return a pointer to something useless. \
2717 * Avoid asserts in typeArrayOop. */ \
2718 result = (ElementType*)get_bad_address(); \
2719 } else { \
2720 /* JNI Specification states return NULL on OOM */ \
2721 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2722 if (result != NULL) { \
2723 /* copy the array to the c chunk */ \
2724 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2725 if (isCopy) { \
2726 *isCopy = JNI_TRUE; \
2727 } \
2728 } \
2729 } \
2730 ReturnProbe; \
2731 return result; \
2732 JNI_END
2733
2734 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2735 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2736 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2738 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2741 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2744 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2747 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2750 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2752 // Float and double probes don't return value because dtrace doesn't currently support it
2753 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2754 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2757 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2759
2760
2761 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2762 , EntryProbe, ReturnProbe);\
2763 \
2764 JNI_QUICK_ENTRY(void, \
2765 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2766 ElementType *buf, jint mode)) \
2767 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2768 EntryProbe; \
2769 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2770 int len = a->length(); \
2771 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2772 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2773 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2774 } \
2775 if ((mode == 0) || (mode == JNI_ABORT)) { \
2776 FreeHeap(buf); \
2777 } \
2778 } \
2779 ReturnProbe; \
2780 JNI_END
2781
2782 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2783 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2784 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2786 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2789 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2790 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2792 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2795 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2798 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2801 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2802 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2804 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2805 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2806
2807
2808 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2809 , EntryProbe, ReturnProbe); \
2810 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2811 , ReturnProbe); \
2812 \
2813 JNI_ENTRY(void, \
2814 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2815 jsize len, ElementType *buf)) \
2816 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2817 EntryProbe; \
2818 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2819 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2820 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2821 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2822 } else { \
2823 if (len > 0) { \
2824 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2825 memcpy((u_char*) buf, \
2826 (u_char*) src->Tag##_at_addr(start), \
2827 len << sc); \
2828 } \
2829 } \
2830 JNI_END
2831
2832 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2833 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2834 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2835 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2836 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2837 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2838 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2839 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2840 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2842 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2843 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2845 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2846 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2848 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2849 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2851 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2852 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2854 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2855 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2856
2857
2858 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2859 , EntryProbe, ReturnProbe); \
2860 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2861 ,ReturnProbe); \
2862 \
2863 JNI_ENTRY(void, \
2864 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2865 jsize len, const ElementType *buf)) \
2866 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2867 EntryProbe; \
2868 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2869 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2870 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2871 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2872 } else { \
2873 if (len > 0) { \
2874 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2875 memcpy((u_char*) dst->Tag##_at_addr(start), \
2876 (u_char*) buf, \
2877 len << sc); \
2878 } \
2879 } \
2880 JNI_END
2881
2882 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2883 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2884 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2885 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2886 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2887 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2889 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2890 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2892 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2895 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2896 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2898 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2899 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2901 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2902 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2904 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2905 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2906
2907
2908 //
2909 // Interception of natives
2910 //
2911
2912 // The RegisterNatives call being attempted tried to register with a method that
2913 // is not native. Ask JVM TI what prefixes have been specified. Then check
2914 // to see if the native method is now wrapped with the prefixes. See the
2915 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2916 static Method* find_prefixed_native(KlassHandle k,
2917 Symbol* name, Symbol* signature, TRAPS) {
2918 #if INCLUDE_JVMTI
2919 ResourceMark rm(THREAD);
2920 Method* method;
2921 int name_len = name->utf8_length();
2922 char* name_str = name->as_utf8();
2923 int prefix_count;
2924 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2925 for (int i = 0; i < prefix_count; i++) {
2926 char* prefix = prefixes[i];
2927 int prefix_len = (int)strlen(prefix);
2928
2929 // try adding this prefix to the method name and see if it matches another method name
2930 int trial_len = name_len + prefix_len;
2931 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2932 strcpy(trial_name_str, prefix);
2933 strcat(trial_name_str, name_str);
2934 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2935 if (trial_name == NULL) {
2936 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2937 }
2938 method = k()->lookup_method(trial_name, signature);
2939 if (method == NULL) {
2940 continue; // signature doesn't match, try the next prefix
2941 }
2942 if (method->is_native()) {
2943 method->set_is_prefixed_native();
2944 return method; // wahoo, we found a prefixed version of the method, return it
2945 }
2946 // found as non-native, so prefix is good, add it, probably just need more prefixes
2947 name_len = trial_len;
2948 name_str = trial_name_str;
2949 }
2950 #endif // INCLUDE_JVMTI
2951 return NULL; // not found
2952 }
2953
2954 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2955 Method* method = k()->lookup_method(name, signature);
2956 if (method == NULL) {
2957 ResourceMark rm;
2958 stringStream st;
2959 st.print("Method %s name or signature does not match",
2960 Method::name_and_sig_as_C_string(k(), name, signature));
2961 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2962 }
2963 if (!method->is_native()) {
2964 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2965 method = find_prefixed_native(k, name, signature, THREAD);
2966 if (method == NULL) {
2967 ResourceMark rm;
2968 stringStream st;
2969 st.print("Method %s is not declared as native",
2970 Method::name_and_sig_as_C_string(k(), name, signature));
2971 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2972 }
2973 }
2974
2975 if (entry != NULL) {
2976 method->set_native_function(entry,
2977 Method::native_bind_event_is_interesting);
2978 } else {
2979 method->clear_native_function();
2980 }
2981 if (PrintJNIResolving) {
2982 ResourceMark rm(THREAD);
2983 tty->print_cr("[Registering JNI native method %s.%s]",
2984 method->method_holder()->external_name(),
2985 method->name()->as_C_string());
2986 }
2987 return true;
2988 }
2989
2990 DT_RETURN_MARK_DECL(RegisterNatives, jint
2991 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2992
2993 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2994 const JNINativeMethod *methods,
2995 jint nMethods))
2996 JNIWrapper("RegisterNatives");
2997 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2998 jint ret = 0;
2999 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3000
3001 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3002
3003 for (int index = 0; index < nMethods; index++) {
3004 const char* meth_name = methods[index].name;
3005 const char* meth_sig = methods[index].signature;
3006 int meth_name_len = (int)strlen(meth_name);
3007
3008 // The class should have been loaded (we have an instance of the class
3009 // passed in) so the method and signature should already be in the symbol
3010 // table. If they're not there, the method doesn't exist.
3011 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3012 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3013
3014 if (name == NULL || signature == NULL) {
3015 ResourceMark rm;
3016 stringStream st;
3017 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3018 // Must return negative value on failure
3019 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3020 }
3021
3022 bool res = register_native(h_k, name, signature,
3023 (address) methods[index].fnPtr, THREAD);
3024 if (!res) {
3025 ret = -1;
3026 break;
3027 }
3028 }
3029 return ret;
3030 JNI_END
3031
3032
3033 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3034 JNIWrapper("UnregisterNatives");
3035 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3036 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3037 //%note jni_2
3038 if (k->is_instance_klass()) {
3039 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3040 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3041 if (m->is_native()) {
3042 m->clear_native_function();
3043 m->set_signature_handler(NULL);
3044 }
3045 }
3046 }
3047 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3048 return 0;
3049 JNI_END
3050
3051 //
3052 // Monitor functions
3053 //
3054
3055 DT_RETURN_MARK_DECL(MonitorEnter, jint
3056 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3057
3058 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3059 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3060 jint ret = JNI_ERR;
3061 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3062
3063 // If the object is null, we can't do anything with it
3064 if (jobj == NULL) {
3065 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3066 }
3067
3068 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3069 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3070 ret = JNI_OK;
3071 return ret;
3072 JNI_END
3073
3074 DT_RETURN_MARK_DECL(MonitorExit, jint
3075 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3076
3077 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3078 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3079 jint ret = JNI_ERR;
3080 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3081
3082 // Don't do anything with a null object
3083 if (jobj == NULL) {
3084 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3085 }
3086
3087 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3088 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3089
3090 ret = JNI_OK;
3091 return ret;
3092 JNI_END
3093
3094 //
3095 // Extensions
3096 //
3097
3098 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3099 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3100
3101 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3102 JNIWrapper("GetStringRegion");
3103 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3104 DT_VOID_RETURN_MARK(GetStringRegion);
3105 oop s = JNIHandles::resolve_non_null(string);
3106 int s_len = java_lang_String::length(s);
3107 if (start < 0 || len < 0 || start + len > s_len) {
3108 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3109 } else {
3110 if (len > 0) {
3111 typeArrayOop s_value = java_lang_String::value(s);
3112 bool is_latin1 = java_lang_String::is_latin1(s);
3113 if (!is_latin1) {
3114 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3115 } else {
3116 for (int i = 0; i < len; i++) {
3117 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3118 }
3119 }
3120 }
3121 }
3122 JNI_END
3123
3124 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3125 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3126
3127 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3128 JNIWrapper("GetStringUTFRegion");
3129 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3130 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3131 oop s = JNIHandles::resolve_non_null(string);
3132 int s_len = java_lang_String::length(s);
3133 if (start < 0 || len < 0 || start + len > s_len) {
3134 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3135 } else {
3136 //%note jni_7
3137 if (len > 0) {
3138 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3139 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3140 // as_utf8_string null-terminates the result string
3141 } else {
3142 // JDK null-terminates the buffer even in len is zero
3143 if (buf != NULL) {
3144 buf[0] = 0;
3145 }
3146 }
3147 }
3148 JNI_END
3149
3150
3151 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3152 JNIWrapper("GetPrimitiveArrayCritical");
3153 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3154 GCLocker::lock_critical(thread);
3155 if (isCopy != NULL) {
3156 *isCopy = JNI_FALSE;
3157 }
3158 oop a = JNIHandles::resolve_non_null(array);
3159 assert(a->is_array(), "just checking");
3160 BasicType type;
3161 if (a->is_objArray()) {
3162 type = T_OBJECT;
3163 } else {
3164 type = TypeArrayKlass::cast(a->klass())->element_type();
3165 }
3166 void* ret = arrayOop(a)->base(type);
3167 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3168 return ret;
3169 JNI_END
3170
3171
3172 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3173 JNIWrapper("ReleasePrimitiveArrayCritical");
3174 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3175 // The array, carray and mode arguments are ignored
3176 GCLocker::unlock_critical(thread);
3177 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3178 JNI_END
3179
3180
3181 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3182 JNIWrapper("GetStringCritical");
3183 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3184 GCLocker::lock_critical(thread);
3185 oop s = JNIHandles::resolve_non_null(string);
3186 typeArrayOop s_value = java_lang_String::value(s);
3187 bool is_latin1 = java_lang_String::is_latin1(s);
3188 if (isCopy != NULL) {
3189 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3190 }
3191 jchar* ret;
3192 if (!is_latin1) {
3193 ret = (jchar*) s_value->base(T_CHAR);
3194 } else {
3195 // Inflate latin1 encoded string to UTF16
3196 int s_len = java_lang_String::length(s);
3197 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3198 /* JNI Specification states return NULL on OOM */
3199 if (ret != NULL) {
3200 for (int i = 0; i < s_len; i++) {
3201 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3202 }
3203 ret[s_len] = 0;
3204 }
3205 }
3206 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3207 return ret;
3208 JNI_END
3209
3210
3211 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3212 JNIWrapper("ReleaseStringCritical");
3213 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3214 // The str and chars arguments are ignored for UTF16 strings
3215 oop s = JNIHandles::resolve_non_null(str);
3216 bool is_latin1 = java_lang_String::is_latin1(s);
3217 if (is_latin1) {
3218 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3219 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3220 FREE_C_HEAP_ARRAY(jchar, chars);
3221 }
3222 GCLocker::unlock_critical(thread);
3223 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3224 JNI_END
3225
3226
3227 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3228 JNIWrapper("jni_NewWeakGlobalRef");
3229 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3230 Handle ref_handle(thread, JNIHandles::resolve(ref));
3231 jweak ret = JNIHandles::make_weak_global(ref_handle);
3232 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3233 return ret;
3234 JNI_END
3235
3236 // Must be JNI_ENTRY (with HandleMark)
3237 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3238 JNIWrapper("jni_DeleteWeakGlobalRef");
3239 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3240 JNIHandles::destroy_weak_global(ref);
3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3242 JNI_END
3243
3244
3245 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3246 JNIWrapper("jni_ExceptionCheck");
3247 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3248 jni_check_async_exceptions(thread);
3249 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3250 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3251 return ret;
3252 JNI_END
3253
3254
3255 // Initialization state for three routines below relating to
3256 // java.nio.DirectBuffers
3257 static jint directBufferSupportInitializeStarted = 0;
3258 static volatile jint directBufferSupportInitializeEnded = 0;
3259 static volatile jint directBufferSupportInitializeFailed = 0;
3260 static jclass bufferClass = NULL;
3261 static jclass directBufferClass = NULL;
3262 static jclass directByteBufferClass = NULL;
3263 static jmethodID directByteBufferConstructor = NULL;
3264 static jfieldID directBufferAddressField = NULL;
3265 static jfieldID bufferCapacityField = NULL;
3266
3267 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3268 Handle loader; // null (bootstrap) loader
3269 Handle protection_domain; // null protection domain
3270
3271 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3272 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3273
3274 if (log_is_enabled(Info, classresolve) && result != NULL) {
3275 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3276 }
3277 return result;
3278 }
3279
3280 // These lookups are done with the NULL (bootstrap) ClassLoader to
3281 // circumvent any security checks that would be done by jni_FindClass.
3282 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3283 {
3284 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3285 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3286 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3287 return true;
3288 }
3289 JNI_END
3290
3291
3292 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3293 if (directBufferSupportInitializeFailed) {
3294 return false;
3295 }
3296
3297 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3298 if (!lookupDirectBufferClasses(env)) {
3299 directBufferSupportInitializeFailed = 1;
3300 return false;
3301 }
3302
3303 // Make global references for these
3304 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3305 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3306 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3307
3308 // Get needed field and method IDs
3309 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3310 if (env->ExceptionCheck()) {
3311 env->ExceptionClear();
3312 directBufferSupportInitializeFailed = 1;
3313 return false;
3314 }
3315 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3316 if (env->ExceptionCheck()) {
3317 env->ExceptionClear();
3318 directBufferSupportInitializeFailed = 1;
3319 return false;
3320 }
3321 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3322 if (env->ExceptionCheck()) {
3323 env->ExceptionClear();
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327
3328 if ((directByteBufferConstructor == NULL) ||
3329 (directBufferAddressField == NULL) ||
3330 (bufferCapacityField == NULL)) {
3331 directBufferSupportInitializeFailed = 1;
3332 return false;
3333 }
3334
3335 directBufferSupportInitializeEnded = 1;
3336 } else {
3337 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3338 os::naked_yield();
3339 }
3340 }
3341
3342 return !directBufferSupportInitializeFailed;
3343 }
3344
3345 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3346 {
3347 // thread_from_jni_environment() will block if VM is gone.
3348 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3349
3350 JNIWrapper("jni_NewDirectByteBuffer");
3351 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3352
3353 if (!directBufferSupportInitializeEnded) {
3354 if (!initializeDirectBufferSupport(env, thread)) {
3355 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3356 return NULL;
3357 }
3358 }
3359
3360 // Being paranoid about accidental sign extension on address
3361 jlong addr = (jlong) ((uintptr_t) address);
3362 // NOTE that package-private DirectByteBuffer constructor currently
3363 // takes int capacity
3364 jint cap = (jint) capacity;
3365 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3366 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3367 return ret;
3368 }
3369
3370 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3371 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3372
3373 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3374 {
3375 // thread_from_jni_environment() will block if VM is gone.
3376 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3377
3378 JNIWrapper("jni_GetDirectBufferAddress");
3379 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3380 void* ret = NULL;
3381 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3382
3383 if (!directBufferSupportInitializeEnded) {
3384 if (!initializeDirectBufferSupport(env, thread)) {
3385 return 0;
3386 }
3387 }
3388
3389 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3390 return 0;
3391 }
3392
3393 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3394 return ret;
3395 }
3396
3397 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3398 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3399
3400 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3401 {
3402 // thread_from_jni_environment() will block if VM is gone.
3403 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3404
3405 JNIWrapper("jni_GetDirectBufferCapacity");
3406 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3407 jlong ret = -1;
3408 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3409
3410 if (!directBufferSupportInitializeEnded) {
3411 if (!initializeDirectBufferSupport(env, thread)) {
3412 ret = 0;
3413 return ret;
3414 }
3415 }
3416
3417 if (buf == NULL) {
3418 return -1;
3419 }
3420
3421 if (!env->IsInstanceOf(buf, directBufferClass)) {
3422 return -1;
3423 }
3424
3425 // NOTE that capacity is currently an int in the implementation
3426 ret = env->GetIntField(buf, bufferCapacityField);
3427 return ret;
3428 }
3429
3430
3431 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3432 JNIWrapper("GetVersion");
3433 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3434 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3435 return CurrentVersion;
3436 JNI_END
3437
3438 extern struct JavaVM_ main_vm;
3439
3440 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3441 JNIWrapper("jni_GetJavaVM");
3442 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3443 *vm = (JavaVM *)(&main_vm);
3444 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3445 return JNI_OK;
3446 JNI_END
3447
3448
3449 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3450 JNIWrapper("GetModule");
3451 return Modules::get_module(clazz, THREAD);
3452 JNI_END
3453
3454
3455 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2))
3456 JNIWrapper("AddModuleReads");
3457 if (m1 == NULL || m2 == NULL) {
3458 THROW(vmSymbols::java_lang_NullPointerException());
3459 }
3460 JavaValue result(T_VOID);
3461 Handle m1_h(THREAD, JNIHandles::resolve(m1));
3462 if (!java_lang_reflect_Module::is_instance(m1_h())) {
3463 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object");
3464 }
3465 Handle m2_h(THREAD, JNIHandles::resolve(m2));
3466 if (!java_lang_reflect_Module::is_instance(m2_h())) {
3467 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object");
3468 }
3469 JavaCalls::call_static(&result,
3470 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()),
3471 vmSymbols::addReads_name(),
3472 vmSymbols::addReads_signature(),
3473 m1_h,
3474 m2_h,
3475 THREAD);
3476 JNI_END
3477
3478
3479 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2))
3480 JNIWrapper("CanReadModule");
3481 if (m1 == NULL || m2 == NULL) {
3482 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3483 }
3484 jboolean res = Modules::can_read_module(m1, m2, CHECK_false);
3485 return res;
3486 JNI_END
3487
3488
3489 // Structure containing all jni functions
3490 struct JNINativeInterface_ jni_NativeInterface = {
3491 NULL,
3492 NULL,
3493 NULL,
3494
3495 NULL,
3496
3497 jni_GetVersion,
3498
3499 jni_DefineClass,
3500 jni_FindClass,
3501
3502 jni_FromReflectedMethod,
3503 jni_FromReflectedField,
3504
3505 jni_ToReflectedMethod,
3506
3507 jni_GetSuperclass,
3508 jni_IsAssignableFrom,
3509
3510 jni_ToReflectedField,
3511
3512 jni_Throw,
3513 jni_ThrowNew,
3514 jni_ExceptionOccurred,
3515 jni_ExceptionDescribe,
3516 jni_ExceptionClear,
3517 jni_FatalError,
3518
3519 jni_PushLocalFrame,
3520 jni_PopLocalFrame,
3521
3522 jni_NewGlobalRef,
3523 jni_DeleteGlobalRef,
3524 jni_DeleteLocalRef,
3525 jni_IsSameObject,
3526
3527 jni_NewLocalRef,
3528 jni_EnsureLocalCapacity,
3529
3530 jni_AllocObject,
3531 jni_NewObject,
3532 jni_NewObjectV,
3533 jni_NewObjectA,
3534
3535 jni_GetObjectClass,
3536 jni_IsInstanceOf,
3537
3538 jni_GetMethodID,
3539
3540 jni_CallObjectMethod,
3541 jni_CallObjectMethodV,
3542 jni_CallObjectMethodA,
3543 jni_CallBooleanMethod,
3544 jni_CallBooleanMethodV,
3545 jni_CallBooleanMethodA,
3546 jni_CallByteMethod,
3547 jni_CallByteMethodV,
3548 jni_CallByteMethodA,
3549 jni_CallCharMethod,
3550 jni_CallCharMethodV,
3551 jni_CallCharMethodA,
3552 jni_CallShortMethod,
3553 jni_CallShortMethodV,
3554 jni_CallShortMethodA,
3555 jni_CallIntMethod,
3556 jni_CallIntMethodV,
3557 jni_CallIntMethodA,
3558 jni_CallLongMethod,
3559 jni_CallLongMethodV,
3560 jni_CallLongMethodA,
3561 jni_CallFloatMethod,
3562 jni_CallFloatMethodV,
3563 jni_CallFloatMethodA,
3564 jni_CallDoubleMethod,
3565 jni_CallDoubleMethodV,
3566 jni_CallDoubleMethodA,
3567 jni_CallVoidMethod,
3568 jni_CallVoidMethodV,
3569 jni_CallVoidMethodA,
3570
3571 jni_CallNonvirtualObjectMethod,
3572 jni_CallNonvirtualObjectMethodV,
3573 jni_CallNonvirtualObjectMethodA,
3574 jni_CallNonvirtualBooleanMethod,
3575 jni_CallNonvirtualBooleanMethodV,
3576 jni_CallNonvirtualBooleanMethodA,
3577 jni_CallNonvirtualByteMethod,
3578 jni_CallNonvirtualByteMethodV,
3579 jni_CallNonvirtualByteMethodA,
3580 jni_CallNonvirtualCharMethod,
3581 jni_CallNonvirtualCharMethodV,
3582 jni_CallNonvirtualCharMethodA,
3583 jni_CallNonvirtualShortMethod,
3584 jni_CallNonvirtualShortMethodV,
3585 jni_CallNonvirtualShortMethodA,
3586 jni_CallNonvirtualIntMethod,
3587 jni_CallNonvirtualIntMethodV,
3588 jni_CallNonvirtualIntMethodA,
3589 jni_CallNonvirtualLongMethod,
3590 jni_CallNonvirtualLongMethodV,
3591 jni_CallNonvirtualLongMethodA,
3592 jni_CallNonvirtualFloatMethod,
3593 jni_CallNonvirtualFloatMethodV,
3594 jni_CallNonvirtualFloatMethodA,
3595 jni_CallNonvirtualDoubleMethod,
3596 jni_CallNonvirtualDoubleMethodV,
3597 jni_CallNonvirtualDoubleMethodA,
3598 jni_CallNonvirtualVoidMethod,
3599 jni_CallNonvirtualVoidMethodV,
3600 jni_CallNonvirtualVoidMethodA,
3601
3602 jni_GetFieldID,
3603
3604 jni_GetObjectField,
3605 jni_GetBooleanField,
3606 jni_GetByteField,
3607 jni_GetCharField,
3608 jni_GetShortField,
3609 jni_GetIntField,
3610 jni_GetLongField,
3611 jni_GetFloatField,
3612 jni_GetDoubleField,
3613
3614 jni_SetObjectField,
3615 jni_SetBooleanField,
3616 jni_SetByteField,
3617 jni_SetCharField,
3618 jni_SetShortField,
3619 jni_SetIntField,
3620 jni_SetLongField,
3621 jni_SetFloatField,
3622 jni_SetDoubleField,
3623
3624 jni_GetStaticMethodID,
3625
3626 jni_CallStaticObjectMethod,
3627 jni_CallStaticObjectMethodV,
3628 jni_CallStaticObjectMethodA,
3629 jni_CallStaticBooleanMethod,
3630 jni_CallStaticBooleanMethodV,
3631 jni_CallStaticBooleanMethodA,
3632 jni_CallStaticByteMethod,
3633 jni_CallStaticByteMethodV,
3634 jni_CallStaticByteMethodA,
3635 jni_CallStaticCharMethod,
3636 jni_CallStaticCharMethodV,
3637 jni_CallStaticCharMethodA,
3638 jni_CallStaticShortMethod,
3639 jni_CallStaticShortMethodV,
3640 jni_CallStaticShortMethodA,
3641 jni_CallStaticIntMethod,
3642 jni_CallStaticIntMethodV,
3643 jni_CallStaticIntMethodA,
3644 jni_CallStaticLongMethod,
3645 jni_CallStaticLongMethodV,
3646 jni_CallStaticLongMethodA,
3647 jni_CallStaticFloatMethod,
3648 jni_CallStaticFloatMethodV,
3649 jni_CallStaticFloatMethodA,
3650 jni_CallStaticDoubleMethod,
3651 jni_CallStaticDoubleMethodV,
3652 jni_CallStaticDoubleMethodA,
3653 jni_CallStaticVoidMethod,
3654 jni_CallStaticVoidMethodV,
3655 jni_CallStaticVoidMethodA,
3656
3657 jni_GetStaticFieldID,
3658
3659 jni_GetStaticObjectField,
3660 jni_GetStaticBooleanField,
3661 jni_GetStaticByteField,
3662 jni_GetStaticCharField,
3663 jni_GetStaticShortField,
3664 jni_GetStaticIntField,
3665 jni_GetStaticLongField,
3666 jni_GetStaticFloatField,
3667 jni_GetStaticDoubleField,
3668
3669 jni_SetStaticObjectField,
3670 jni_SetStaticBooleanField,
3671 jni_SetStaticByteField,
3672 jni_SetStaticCharField,
3673 jni_SetStaticShortField,
3674 jni_SetStaticIntField,
3675 jni_SetStaticLongField,
3676 jni_SetStaticFloatField,
3677 jni_SetStaticDoubleField,
3678
3679 jni_NewString,
3680 jni_GetStringLength,
3681 jni_GetStringChars,
3682 jni_ReleaseStringChars,
3683
3684 jni_NewStringUTF,
3685 jni_GetStringUTFLength,
3686 jni_GetStringUTFChars,
3687 jni_ReleaseStringUTFChars,
3688
3689 jni_GetArrayLength,
3690
3691 jni_NewObjectArray,
3692 jni_GetObjectArrayElement,
3693 jni_SetObjectArrayElement,
3694
3695 jni_NewBooleanArray,
3696 jni_NewByteArray,
3697 jni_NewCharArray,
3698 jni_NewShortArray,
3699 jni_NewIntArray,
3700 jni_NewLongArray,
3701 jni_NewFloatArray,
3702 jni_NewDoubleArray,
3703
3704 jni_GetBooleanArrayElements,
3705 jni_GetByteArrayElements,
3706 jni_GetCharArrayElements,
3707 jni_GetShortArrayElements,
3708 jni_GetIntArrayElements,
3709 jni_GetLongArrayElements,
3710 jni_GetFloatArrayElements,
3711 jni_GetDoubleArrayElements,
3712
3713 jni_ReleaseBooleanArrayElements,
3714 jni_ReleaseByteArrayElements,
3715 jni_ReleaseCharArrayElements,
3716 jni_ReleaseShortArrayElements,
3717 jni_ReleaseIntArrayElements,
3718 jni_ReleaseLongArrayElements,
3719 jni_ReleaseFloatArrayElements,
3720 jni_ReleaseDoubleArrayElements,
3721
3722 jni_GetBooleanArrayRegion,
3723 jni_GetByteArrayRegion,
3724 jni_GetCharArrayRegion,
3725 jni_GetShortArrayRegion,
3726 jni_GetIntArrayRegion,
3727 jni_GetLongArrayRegion,
3728 jni_GetFloatArrayRegion,
3729 jni_GetDoubleArrayRegion,
3730
3731 jni_SetBooleanArrayRegion,
3732 jni_SetByteArrayRegion,
3733 jni_SetCharArrayRegion,
3734 jni_SetShortArrayRegion,
3735 jni_SetIntArrayRegion,
3736 jni_SetLongArrayRegion,
3737 jni_SetFloatArrayRegion,
3738 jni_SetDoubleArrayRegion,
3739
3740 jni_RegisterNatives,
3741 jni_UnregisterNatives,
3742
3743 jni_MonitorEnter,
3744 jni_MonitorExit,
3745
3746 jni_GetJavaVM,
3747
3748 jni_GetStringRegion,
3749 jni_GetStringUTFRegion,
3750
3751 jni_GetPrimitiveArrayCritical,
3752 jni_ReleasePrimitiveArrayCritical,
3753
3754 jni_GetStringCritical,
3755 jni_ReleaseStringCritical,
3756
3757 jni_NewWeakGlobalRef,
3758 jni_DeleteWeakGlobalRef,
3759
3760 jni_ExceptionCheck,
3761
3762 jni_NewDirectByteBuffer,
3763 jni_GetDirectBufferAddress,
3764 jni_GetDirectBufferCapacity,
3765
3766 // New 1_6 features
3767
3768 jni_GetObjectRefType,
3769
3770 // Module features
3771
3772 jni_GetModule,
3773 jni_AddModuleReads,
3774 jni_CanReadModule
3775 };
3776
3777
3778 // For jvmti use to modify jni function table.
3779 // Java threads in native contiues to run until it is transitioned
3780 // to VM at safepoint. Before the transition or before it is blocked
3781 // for safepoint it may access jni function table. VM could crash if
3782 // any java thread access the jni function table in the middle of memcpy.
3783 // To avoid this each function pointers are copied automically.
3784 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3785 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3786 intptr_t *a = (intptr_t *) jni_functions();
3787 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3788 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3789 Atomic::store_ptr(*b++, a++);
3790 }
3791 }
3792
3793 void quicken_jni_functions() {
3794 // Replace Get<Primitive>Field with fast versions
3795 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3796 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3797 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3798 // windows x86 currently needs SEH wrapper and the gain of the fast
3799 // versions currently isn't certain for server vm on uniprocessor.
3800 && os::is_MP()
3801 #endif
3802 ) {
3803 address func;
3804 func = JNI_FastGetField::generate_fast_get_boolean_field();
3805 if (func != (address)-1) {
3806 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3807 }
3808 func = JNI_FastGetField::generate_fast_get_byte_field();
3809 if (func != (address)-1) {
3810 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3811 }
3812 func = JNI_FastGetField::generate_fast_get_char_field();
3813 if (func != (address)-1) {
3814 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3815 }
3816 func = JNI_FastGetField::generate_fast_get_short_field();
3817 if (func != (address)-1) {
3818 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3819 }
3820 func = JNI_FastGetField::generate_fast_get_int_field();
3821 if (func != (address)-1) {
3822 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3823 }
3824 func = JNI_FastGetField::generate_fast_get_long_field();
3825 if (func != (address)-1) {
3826 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3827 }
3828 func = JNI_FastGetField::generate_fast_get_float_field();
3829 if (func != (address)-1) {
3830 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3831 }
3832 func = JNI_FastGetField::generate_fast_get_double_field();
3833 if (func != (address)-1) {
3834 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3835 }
3836 }
3837 }
3838
3839 // Returns the function structure
3840 struct JNINativeInterface_* jni_functions() {
3841 #if INCLUDE_JNI_CHECK
3842 if (CheckJNICalls) return jni_functions_check();
3843 #endif // INCLUDE_JNI_CHECK
3844 return &jni_NativeInterface;
3845 }
3846
3847 // Returns the function structure
3848 struct JNINativeInterface_* jni_functions_nocheck() {
3849 return &jni_NativeInterface;
3850 }
3851
3852
3853 // Invocation API
3854
3855
3856 // Forward declaration
3857 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3858
3859 // Global invocation API vars
3860 volatile jint vm_created = 0;
3861 // Indicate whether it is safe to recreate VM
3862 volatile jint safe_to_recreate_vm = 1;
3863 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3864
3865
3866 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3867 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3868
3869 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3870 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3871
3872 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3873 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3874 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3875 jint ret = JNI_ERR;
3876 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3877
3878 if (Threads::is_supported_jni_version(args->version)) {
3879 ret = JNI_OK;
3880 }
3881 // 1.1 style no longer supported in hotspot.
3882 // According the JNI spec, we should update args->version on return.
3883 // We also use the structure to communicate with launcher about default
3884 // stack size.
3885 if (args->version == JNI_VERSION_1_1) {
3886 args->version = JNI_VERSION_1_2;
3887 // javaStackSize is int in arguments structure
3888 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3889 args->javaStackSize = (jint)(ThreadStackSize * K);
3890 }
3891 return ret;
3892 }
3893
3894 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3895 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3896
3897 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3898 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3899
3900 jint result = JNI_ERR;
3901 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3902
3903 // We're about to use Atomic::xchg for synchronization. Some Zero
3904 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3905 // but __sync_lock_test_and_set is not guaranteed to do what we want
3906 // on all architectures. So we check it works before relying on it.
3907 #if defined(ZERO) && defined(ASSERT)
3908 {
3909 jint a = 0xcafebabe;
3910 jint b = Atomic::xchg(0xdeadbeef, &a);
3911 void *c = &a;
3912 void *d = Atomic::xchg_ptr(&b, &c);
3913 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3914 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3915 }
3916 #endif // ZERO && ASSERT
3917
3918 // At the moment it's only possible to have one Java VM,
3919 // since some of the runtime state is in global variables.
3920
3921 // We cannot use our mutex locks here, since they only work on
3922 // Threads. We do an atomic compare and exchange to ensure only
3923 // one thread can call this method at a time
3924
3925 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3926 // the add/dec implementations are dependent on whether we are running
3927 // on a multiprocessor, and at this stage of initialization the os::is_MP
3928 // function used to determine this will always return false. Atomic::xchg
3929 // does not have this problem.
3930 if (Atomic::xchg(1, &vm_created) == 1) {
3931 return JNI_EEXIST; // already created, or create attempt in progress
3932 }
3933 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3934 return JNI_ERR; // someone tried and failed and retry not allowed.
3935 }
3936
3937 assert(vm_created == 1, "vm_created is true during the creation");
3938
3939 /**
3940 * Certain errors during initialization are recoverable and do not
3941 * prevent this method from being called again at a later time
3942 * (perhaps with different arguments). However, at a certain
3943 * point during initialization if an error occurs we cannot allow
3944 * this function to be called again (or it will crash). In those
3945 * situations, the 'canTryAgain' flag is set to false, which atomically
3946 * sets safe_to_recreate_vm to 1, such that any new call to
3947 * JNI_CreateJavaVM will immediately fail using the above logic.
3948 */
3949 bool can_try_again = true;
3950
3951 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3952 if (result == JNI_OK) {
3953 JavaThread *thread = JavaThread::current();
3954 assert(!thread->has_pending_exception(), "should have returned not OK");
3955 /* thread is thread_in_vm here */
3956 *vm = (JavaVM *)(&main_vm);
3957 *(JNIEnv**)penv = thread->jni_environment();
3958
3959 #if INCLUDE_JVMCI
3960 if (EnableJVMCI) {
3961 if (UseJVMCICompiler) {
3962 // JVMCI is initialized on a CompilerThread
3963 if (BootstrapJVMCI) {
3964 JavaThread* THREAD = thread;
3965 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3966 compiler->bootstrap();
3967 }
3968 }
3969 }
3970 #endif
3971
3972 // Tracks the time application was running before GC
3973 RuntimeService::record_application_start();
3974
3975 // Notify JVMTI
3976 if (JvmtiExport::should_post_thread_life()) {
3977 JvmtiExport::post_thread_start(thread);
3978 }
3979
3980 EventThreadStart event;
3981 if (event.should_commit()) {
3982 event.set_thread(THREAD_TRACE_ID(thread));
3983 event.commit();
3984 }
3985
3986 #ifndef PRODUCT
3987 // Check if we should compile all classes on bootclasspath
3988 if (CompileTheWorld) ClassLoader::compile_the_world();
3989 if (ReplayCompiles) ciReplay::replay(thread);
3990
3991 // Some platforms (like Win*) need a wrapper around these test
3992 // functions in order to properly handle error conditions.
3993 test_error_handler();
3994 if (ExecuteInternalVMTests) {
3995 InternalVMTests::run();
3996 }
3997 #endif
3998
3999 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4000 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4001 } else {
4002 // If create_vm exits because of a pending exception, exit with that
4003 // exception. In the future when we figure out how to reclaim memory,
4004 // we may be able to exit with JNI_ERR and allow the calling application
4005 // to continue.
4006 if (Universe::is_fully_initialized()) {
4007 // otherwise no pending exception possible - VM will already have aborted
4008 JavaThread* THREAD = JavaThread::current();
4009 if (HAS_PENDING_EXCEPTION) {
4010 HandleMark hm;
4011 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4012 }
4013 }
4014
4015 if (can_try_again) {
4016 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4017 safe_to_recreate_vm = 1;
4018 }
4019
4020 // Creation failed. We must reset vm_created
4021 *vm = 0;
4022 *(JNIEnv**)penv = 0;
4023 // reset vm_created last to avoid race condition. Use OrderAccess to
4024 // control both compiler and architectural-based reordering.
4025 OrderAccess::release_store(&vm_created, 0);
4026 }
4027
4028 // Flush stdout and stderr before exit.
4029 fflush(stdout);
4030 fflush(stderr);
4031
4032 return result;
4033
4034 }
4035
4036 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4037 jint result = 0;
4038 // On Windows, let CreateJavaVM run with SEH protection
4039 #ifdef _WIN32
4040 __try {
4041 #endif
4042 result = JNI_CreateJavaVM_inner(vm, penv, args);
4043 #ifdef _WIN32
4044 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4045 // Nothing to do.
4046 }
4047 #endif
4048 return result;
4049 }
4050
4051 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4052 // See bug 4367188, the wrapper can sometimes cause VM crashes
4053 // JNIWrapper("GetCreatedJavaVMs");
4054
4055 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4056
4057 if (vm_created) {
4058 if (numVMs != NULL) *numVMs = 1;
4059 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4060 } else {
4061 if (numVMs != NULL) *numVMs = 0;
4062 }
4063 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4064 return JNI_OK;
4065 }
4066
4067 extern "C" {
4068
4069 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4070 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4071
4072 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4073 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4074 jint res = JNI_ERR;
4075 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4076
4077 if (!vm_created) {
4078 res = JNI_ERR;
4079 return res;
4080 }
4081
4082 JNIWrapper("DestroyJavaVM");
4083 JNIEnv *env;
4084 JavaVMAttachArgs destroyargs;
4085 destroyargs.version = CurrentVersion;
4086 destroyargs.name = (char *)"DestroyJavaVM";
4087 destroyargs.group = NULL;
4088 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4089 if (res != JNI_OK) {
4090 return res;
4091 }
4092
4093 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4094 JavaThread* thread = JavaThread::current();
4095 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4096 if (Threads::destroy_vm()) {
4097 // Should not change thread state, VM is gone
4098 vm_created = false;
4099 res = JNI_OK;
4100 return res;
4101 } else {
4102 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4103 res = JNI_ERR;
4104 return res;
4105 }
4106 }
4107
4108
4109 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4110 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4111
4112 // Check below commented out from JDK1.2fcs as well
4113 /*
4114 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4115 return JNI_EVERSION;
4116 }
4117 */
4118
4119 Thread* t = Thread::current_or_null();
4120 if (t != NULL) {
4121 // If the thread has been attached this operation is a no-op
4122 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4123 return JNI_OK;
4124 }
4125
4126 // Create a thread and mark it as attaching so it will be skipped by the
4127 // ThreadsListEnumerator - see CR 6404306
4128 JavaThread* thread = new JavaThread(true);
4129
4130 // Set correct safepoint info. The thread is going to call into Java when
4131 // initializing the Java level thread object. Hence, the correct state must
4132 // be set in order for the Safepoint code to deal with it correctly.
4133 thread->set_thread_state(_thread_in_vm);
4134 thread->record_stack_base_and_size();
4135 thread->initialize_thread_current();
4136
4137 if (!os::create_attached_thread(thread)) {
4138 delete thread;
4139 return JNI_ERR;
4140 }
4141 // Enable stack overflow checks
4142 thread->create_stack_guard_pages();
4143
4144 thread->initialize_tlab();
4145
4146 thread->cache_global_variables();
4147
4148 // Crucial that we do not have a safepoint check for this thread, since it has
4149 // not been added to the Thread list yet.
4150 { Threads_lock->lock_without_safepoint_check();
4151 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4152 // avoid this thread trying to do a GC before it is added to the thread-list
4153 thread->set_active_handles(JNIHandleBlock::allocate_block());
4154 Threads::add(thread, daemon);
4155 Threads_lock->unlock();
4156 }
4157 // Create thread group and name info from attach arguments
4158 oop group = NULL;
4159 char* thread_name = NULL;
4160 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4161 group = JNIHandles::resolve(args->group);
4162 thread_name = args->name; // may be NULL
4163 }
4164 if (group == NULL) group = Universe::main_thread_group();
4165
4166 // Create Java level thread object and attach it to this thread
4167 bool attach_failed = false;
4168 {
4169 EXCEPTION_MARK;
4170 HandleMark hm(THREAD);
4171 Handle thread_group(THREAD, group);
4172 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4173 if (HAS_PENDING_EXCEPTION) {
4174 CLEAR_PENDING_EXCEPTION;
4175 // cleanup outside the handle mark.
4176 attach_failed = true;
4177 }
4178 }
4179
4180 if (attach_failed) {
4181 // Added missing cleanup
4182 thread->cleanup_failed_attach_current_thread();
4183 return JNI_ERR;
4184 }
4185
4186 // mark the thread as no longer attaching
4187 // this uses a fence to push the change through so we don't have
4188 // to regrab the threads_lock
4189 thread->set_done_attaching_via_jni();
4190
4191 // Set java thread status.
4192 java_lang_Thread::set_thread_status(thread->threadObj(),
4193 java_lang_Thread::RUNNABLE);
4194
4195 // Notify the debugger
4196 if (JvmtiExport::should_post_thread_life()) {
4197 JvmtiExport::post_thread_start(thread);
4198 }
4199
4200 EventThreadStart event;
4201 if (event.should_commit()) {
4202 event.set_thread(THREAD_TRACE_ID(thread));
4203 event.commit();
4204 }
4205
4206 *(JNIEnv**)penv = thread->jni_environment();
4207
4208 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4209 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4210 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4211 // needed.
4212
4213 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4214
4215 // Perform any platform dependent FPU setup
4216 os::setup_fpu();
4217
4218 return JNI_OK;
4219 }
4220
4221
4222 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4223 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4224 if (!vm_created) {
4225 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4226 return JNI_ERR;
4227 }
4228
4229 JNIWrapper("AttachCurrentThread");
4230 jint ret = attach_current_thread(vm, penv, _args, false);
4231 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4232 return ret;
4233 }
4234
4235
4236 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4237 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4238 VM_Exit::block_if_vm_exited();
4239
4240 JNIWrapper("DetachCurrentThread");
4241
4242 // If the thread has already been detached the operation is a no-op
4243 if (Thread::current_or_null() == NULL) {
4244 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4245 return JNI_OK;
4246 }
4247
4248 JavaThread* thread = JavaThread::current();
4249 if (thread->has_last_Java_frame()) {
4250 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4251 // Can't detach a thread that's running java, that can't work.
4252 return JNI_ERR;
4253 }
4254
4255 // Safepoint support. Have to do call-back to safepoint code, if in the
4256 // middel of a safepoint operation
4257 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4258
4259 // XXX: Note that JavaThread::exit() call below removes the guards on the
4260 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4261 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4262 // of the guards is visible in jni_AttachCurrentThread above,
4263 // the removal of the guards is buried below in JavaThread::exit()
4264 // here. The abstraction should be more symmetrically either exposed
4265 // or hidden (e.g. it could probably be hidden in the same
4266 // (platform-dependent) methods where we do alternate stack
4267 // maintenance work?)
4268 thread->exit(false, JavaThread::jni_detach);
4269 delete thread;
4270
4271 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4272 return JNI_OK;
4273 }
4274
4275 DT_RETURN_MARK_DECL(GetEnv, jint
4276 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4277
4278 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4279 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4280 jint ret = JNI_ERR;
4281 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4282
4283 if (!vm_created) {
4284 *penv = NULL;
4285 ret = JNI_EDETACHED;
4286 return ret;
4287 }
4288
4289 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4290 return ret;
4291 }
4292
4293 #ifndef JVMPI_VERSION_1
4294 // need these in order to be polite about older agents
4295 #define JVMPI_VERSION_1 ((jint)0x10000001)
4296 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4297 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4298 #endif // !JVMPI_VERSION_1
4299
4300 Thread* thread = Thread::current_or_null();
4301 if (thread != NULL && thread->is_Java_thread()) {
4302 if (Threads::is_supported_jni_version_including_1_1(version)) {
4303 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4304 ret = JNI_OK;
4305 return ret;
4306
4307 } else if (version == JVMPI_VERSION_1 ||
4308 version == JVMPI_VERSION_1_1 ||
4309 version == JVMPI_VERSION_1_2) {
4310 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4311 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4312 ret = JNI_EVERSION;
4313 return ret;
4314 } else if (JvmtiExport::is_jvmdi_version(version)) {
4315 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4316 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4317 ret = JNI_EVERSION;
4318 return ret;
4319 } else {
4320 *penv = NULL;
4321 ret = JNI_EVERSION;
4322 return ret;
4323 }
4324 } else {
4325 *penv = NULL;
4326 ret = JNI_EDETACHED;
4327 return ret;
4328 }
4329 }
4330
4331
4332 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4333 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4334 if (!vm_created) {
4335 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4336 return JNI_ERR;
4337 }
4338
4339 JNIWrapper("AttachCurrentThreadAsDaemon");
4340 jint ret = attach_current_thread(vm, penv, _args, true);
4341 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4342 return ret;
4343 }
4344
4345
4346 } // End extern "C"
4347
4348 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4349 NULL,
4350 NULL,
4351 NULL,
4352
4353 jni_DestroyJavaVM,
4354 jni_AttachCurrentThread,
4355 jni_DetachCurrentThread,
4356 jni_GetEnv,
4357 jni_AttachCurrentThreadAsDaemon
4358 };