1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/gcLocker.inline.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/compilationPolicy.hpp"
64 #include "runtime/fieldDescriptor.hpp"
65 #include "runtime/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 #include "utilities/vmError.hpp"
87 #if INCLUDE_ALL_GCS
88 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
89 #endif // INCLUDE_ALL_GCS
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_9;
96
97 #ifdef _WIN32
98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
99 #endif
100
101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
102 // '-return' probe regardless of the return path is taken out of the function.
103 // Methods that have multiple return paths use this to avoid having to
104 // instrument each return path. Methods that use CHECK or THROW must use this
105 // since those macros can cause an immedate uninstrumented return.
106 //
107 // In order to get the return value, a reference to the variable containing
108 // the return value must be passed to the contructor of the object, and
109 // the return value must be set before return (since the mark object has
110 // a reference to it).
111 //
112 // Example:
113 // DT_RETURN_MARK_DECL(SomeFunc, int);
114 // JNI_ENTRY(int, SomeFunc, ...)
115 // int return_value = 0;
116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
117 // foo(CHECK_0)
118 // return_value = 5;
119 // return return_value;
120 // JNI_END
121 #define DT_RETURN_MARK_DECL(name, type, probe) \
122 DTRACE_ONLY( \
123 class DTraceReturnProbeMark_##name { \
124 public: \
125 const type& _ret_ref; \
126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132 // Void functions are simpler since there's no return value
133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142
143 // Place these macros in the function to mark the return. Non-void
144 // functions need the type and address of the return value.
145 #define DT_RETURN_MARK(name, type, ref) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
147 #define DT_VOID_RETURN_MARK(name) \
148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
149
150
151 // Use these to select distinct code for floating-point vs. non-floating point
152 // situations. Used from within common macros where we need slightly
153 // different behavior for Float/Double
154 #define FP_SELECT_Boolean(intcode, fpcode) intcode
155 #define FP_SELECT_Byte(intcode, fpcode) intcode
156 #define FP_SELECT_Char(intcode, fpcode) intcode
157 #define FP_SELECT_Short(intcode, fpcode) intcode
158 #define FP_SELECT_Object(intcode, fpcode) intcode
159 #define FP_SELECT_Int(intcode, fpcode) intcode
160 #define FP_SELECT_Long(intcode, fpcode) intcode
161 #define FP_SELECT_Float(intcode, fpcode) fpcode
162 #define FP_SELECT_Double(intcode, fpcode) fpcode
163 #define FP_SELECT(TypeName, intcode, fpcode) \
164 FP_SELECT_##TypeName(intcode, fpcode)
165
166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(NoSafepointVerifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(NoSafepointVerifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Wrapper to trace JNI functions
263
264 #ifdef ASSERT
265 Histogram* JNIHistogram;
266 static volatile jint JNIHistogram_lock = 0;
267
268 class JNIHistogramElement : public HistogramElement {
269 public:
270 JNIHistogramElement(const char* name);
271 };
272
273 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
274 _name = elementName;
275 uintx count = 0;
276
277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
279 count +=1;
280 if ( (WarnOnStalledSpinLock > 0)
281 && (count % WarnOnStalledSpinLock == 0)) {
282 warning("JNIHistogram_lock seems to be stalled");
283 }
284 }
285 }
286
287
288 if(JNIHistogram == NULL)
289 JNIHistogram = new Histogram("JNI Call Counts",100);
290
291 JNIHistogram->add_element(this);
292 Atomic::dec(&JNIHistogram_lock);
293 }
294
295 #define JNICountWrapper(arg) \
296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
298 if (e != NULL) e->increment_count()
299 #define JNIWrapper(arg) JNICountWrapper(arg);
300 #else
301 #define JNIWrapper(arg)
302 #endif
303
304
305 // Implementation of JNI entries
306
307 DT_RETURN_MARK_DECL(DefineClass, jclass
308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
309
310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
311 const jbyte *buf, jsize bufLen))
312 JNIWrapper("DefineClass");
313
314 HOTSPOT_JNI_DEFINECLASS_ENTRY(
315 env, (char*) name, loaderRef, (char*) buf, bufLen);
316
317 jclass cls = NULL;
318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
319
320 TempNewSymbol class_name = NULL;
321 // Since exceptions can be thrown, class initialization can take place
322 // if name is NULL no check for class name in .class stream has to be made.
323 if (name != NULL) {
324 const int str_len = (int)strlen(name);
325 if (str_len > Symbol::max_length()) {
326 // It's impossible to create this class; the name cannot fit
327 // into the constant pool.
328 Exceptions::fthrow(THREAD_AND_LOCATION,
329 vmSymbols::java_lang_NoClassDefFoundError(),
330 "Class name exceeds maximum length of %d: %s",
331 Symbol::max_length(),
332 name);
333 return 0;
334 }
335 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
336 }
337 ResourceMark rm(THREAD);
338 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
340
341 if (UsePerfData && !class_loader.is_null()) {
342 // check whether the current caller thread holds the lock or not.
343 // If not, increment the corresponding counter
344 if (ObjectSynchronizer::
345 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
346 ObjectSynchronizer::owner_self) {
347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
348 }
349 }
350 Klass* k = SystemDictionary::resolve_from_stream(class_name,
351 class_loader,
352 Handle(),
353 &st,
354 CHECK_NULL);
355
356 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
357 trace_class_resolution(k);
358 }
359
360 cls = (jclass)JNIHandles::make_local(
361 env, k->java_mirror());
362 return cls;
363 JNI_END
364
365
366
367 static bool first_time_FindClass = true;
368
369 DT_RETURN_MARK_DECL(FindClass, jclass
370 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
371
372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
373 JNIWrapper("FindClass");
374
375 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
376
377 jclass result = NULL;
378 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
379
380 // Remember if we are the first invocation of jni_FindClass
381 bool first_time = first_time_FindClass;
382 first_time_FindClass = false;
383
384 // Sanity check the name: it cannot be null or larger than the maximum size
385 // name we can fit in the constant pool.
386 if (name == NULL) {
387 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
388 }
389 if ((int)strlen(name) > Symbol::max_length()) {
390 Exceptions::fthrow(THREAD_AND_LOCATION,
391 vmSymbols::java_lang_NoClassDefFoundError(),
392 "Class name exceeds maximum length of %d: %s",
393 Symbol::max_length(),
394 name);
395 return 0;
396 }
397
398 //%note jni_3
399 Handle loader;
400 Handle protection_domain;
401 // Find calling class
402 Klass* k = thread->security_get_caller_class(0);
403 if (k != NULL) {
404 loader = Handle(THREAD, k->class_loader());
405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
406 // in the correct class context.
407 if (loader.is_null() &&
408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
409 JavaValue result(T_OBJECT);
410 JavaCalls::call_static(&result, k,
411 vmSymbols::getFromClass_name(),
412 vmSymbols::void_class_signature(),
413 thread);
414 if (HAS_PENDING_EXCEPTION) {
415 Handle ex(thread, thread->pending_exception());
416 CLEAR_PENDING_EXCEPTION;
417 THROW_HANDLE_0(ex);
418 }
419 oop mirror = (oop) result.get_jobject();
420 loader = Handle(THREAD,
421 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
422 protection_domain = Handle(THREAD,
423 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
424 }
425 } else {
426 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
427 loader = Handle(THREAD, SystemDictionary::java_system_loader());
428 }
429
430 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
431 result = find_class_from_class_loader(env, sym, true, loader,
432 protection_domain, true, thread);
433
434 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
435 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
436 }
437
438 // If we were the first invocation of jni_FindClass, we enable compilation again
439 // rather than just allowing invocation counter to overflow and decay.
440 // Controlled by flag DelayCompilationDuringStartup.
441 if (first_time && !CompileTheWorld)
442 CompilationPolicy::completed_vm_startup();
443
444 return result;
445 JNI_END
446
447 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
448 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
449
450 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
451 JNIWrapper("FromReflectedMethod");
452
453 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
454
455 jmethodID ret = NULL;
456 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
457
458 // method is a handle to a java.lang.reflect.Method object
459 oop reflected = JNIHandles::resolve_non_null(method);
460 oop mirror = NULL;
461 int slot = 0;
462
463 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
464 mirror = java_lang_reflect_Constructor::clazz(reflected);
465 slot = java_lang_reflect_Constructor::slot(reflected);
466 } else {
467 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
468 mirror = java_lang_reflect_Method::clazz(reflected);
469 slot = java_lang_reflect_Method::slot(reflected);
470 }
471 Klass* k1 = java_lang_Class::as_Klass(mirror);
472
473 // Make sure class is initialized before handing id's out to methods
474 k1->initialize(CHECK_NULL);
475 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
476 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
477 return ret;
478 JNI_END
479
480 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
481 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
482
483 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
484 JNIWrapper("FromReflectedField");
485
486 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
487
488 jfieldID ret = NULL;
489 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
490
491 // field is a handle to a java.lang.reflect.Field object
492 oop reflected = JNIHandles::resolve_non_null(field);
493 oop mirror = java_lang_reflect_Field::clazz(reflected);
494 Klass* k1 = java_lang_Class::as_Klass(mirror);
495 int slot = java_lang_reflect_Field::slot(reflected);
496 int modifiers = java_lang_reflect_Field::modifiers(reflected);
497
498 // Make sure class is initialized before handing id's out to fields
499 k1->initialize(CHECK_NULL);
500
501 // First check if this is a static field
502 if (modifiers & JVM_ACC_STATIC) {
503 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
504 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
505 assert(id != NULL, "corrupt Field object");
506 debug_only(id->set_is_static_field_id();)
507 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
508 ret = jfieldIDWorkaround::to_static_jfieldID(id);
509 return ret;
510 }
511
512 // The slot is the index of the field description in the field-array
513 // The jfieldID is the offset of the field within the object
514 // It may also have hash bits for k, if VerifyJNIFields is turned on.
515 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
516 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
517 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
518 return ret;
519 JNI_END
520
521
522 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
523 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
524
525 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
526 JNIWrapper("ToReflectedMethod");
527
528 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
529
530 jobject ret = NULL;
531 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
532
533 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
534 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
535 oop reflection_method;
536 if (m->is_initializer()) {
537 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
538 } else {
539 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
540 }
541 ret = JNIHandles::make_local(env, reflection_method);
542 return ret;
543 JNI_END
544
545 DT_RETURN_MARK_DECL(GetSuperclass, jclass
546 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
547
548 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
549 JNIWrapper("GetSuperclass");
550
551 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
552
553 jclass obj = NULL;
554 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
555
556 oop mirror = JNIHandles::resolve_non_null(sub);
557 // primitive classes return NULL
558 if (java_lang_Class::is_primitive(mirror)) return NULL;
559
560 // Rules of Class.getSuperClass as implemented by KLass::java_super:
561 // arrays return Object
562 // interfaces return NULL
563 // proper classes return Klass::super()
564 Klass* k = java_lang_Class::as_Klass(mirror);
565 if (k->is_interface()) return NULL;
566
567 // return mirror for superclass
568 Klass* super = k->java_super();
569 // super2 is the value computed by the compiler's getSuperClass intrinsic:
570 debug_only(Klass* super2 = ( k->is_array_klass()
571 ? SystemDictionary::Object_klass()
572 : k->super() ) );
573 assert(super == super2,
574 "java_super computation depends on interface, array, other super");
575 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
576 return obj;
577 JNI_END
578
579 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
580 JNIWrapper("IsSubclassOf");
581
582 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
583
584 oop sub_mirror = JNIHandles::resolve_non_null(sub);
585 oop super_mirror = JNIHandles::resolve_non_null(super);
586 if (java_lang_Class::is_primitive(sub_mirror) ||
587 java_lang_Class::is_primitive(super_mirror)) {
588 jboolean ret = (sub_mirror == super_mirror);
589
590 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
591 return ret;
592 }
593 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
594 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
595 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
596 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
597 JNI_TRUE : JNI_FALSE;
598
599 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
600 return ret;
601 JNI_END
602
603
604 DT_RETURN_MARK_DECL(Throw, jint
605 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
606
607 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
608 JNIWrapper("Throw");
609
610 HOTSPOT_JNI_THROW_ENTRY(env, obj);
611
612 jint ret = JNI_OK;
613 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
614
615 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
616 ShouldNotReachHere();
617 return 0; // Mute compiler.
618 JNI_END
619
620
621 DT_RETURN_MARK_DECL(ThrowNew, jint
622 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
623
624 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
625 JNIWrapper("ThrowNew");
626
627 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
628
629 jint ret = JNI_OK;
630 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
631
632 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
633 Symbol* name = k->name();
634 Handle class_loader (THREAD, k->class_loader());
635 Handle protection_domain (THREAD, k->protection_domain());
636 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
637 ShouldNotReachHere();
638 return 0; // Mute compiler.
639 JNI_END
640
641
642 // JNI functions only transform a pending async exception to a synchronous
643 // exception in ExceptionOccurred and ExceptionCheck calls, since
644 // delivering an async exception in other places won't change the native
645 // code's control flow and would be harmful when native code further calls
646 // JNI functions with a pending exception. Async exception is also checked
647 // during the call, so ExceptionOccurred/ExceptionCheck won't return
648 // false but deliver the async exception at the very end during
649 // state transition.
650
651 static void jni_check_async_exceptions(JavaThread *thread) {
652 assert(thread == Thread::current(), "must be itself");
653 thread->check_and_handle_async_exceptions();
654 }
655
656 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
657 JNIWrapper("ExceptionOccurred");
658
659 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
660
661 jni_check_async_exceptions(thread);
662 oop exception = thread->pending_exception();
663 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
664
665 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
666 return ret;
667 JNI_END
668
669
670 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
671 JNIWrapper("ExceptionDescribe");
672
673 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
674
675 if (thread->has_pending_exception()) {
676 Handle ex(thread, thread->pending_exception());
677 thread->clear_pending_exception();
678 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
679 // Don't print anything if we are being killed.
680 } else {
681 jio_fprintf(defaultStream::error_stream(), "Exception ");
682 if (thread != NULL && thread->threadObj() != NULL) {
683 ResourceMark rm(THREAD);
684 jio_fprintf(defaultStream::error_stream(),
685 "in thread \"%s\" ", thread->get_thread_name());
686 }
687 if (ex->is_a(SystemDictionary::Throwable_klass())) {
688 JavaValue result(T_VOID);
689 JavaCalls::call_virtual(&result,
690 ex,
691 SystemDictionary::Throwable_klass(),
692 vmSymbols::printStackTrace_name(),
693 vmSymbols::void_method_signature(),
694 THREAD);
695 // If an exception is thrown in the call it gets thrown away. Not much
696 // we can do with it. The native code that calls this, does not check
697 // for the exception - hence, it might still be in the thread when DestroyVM gets
698 // called, potentially causing a few asserts to trigger - since no pending exception
699 // is expected.
700 CLEAR_PENDING_EXCEPTION;
701 } else {
702 ResourceMark rm(THREAD);
703 jio_fprintf(defaultStream::error_stream(),
704 ". Uncaught exception of type %s.",
705 ex->klass()->external_name());
706 }
707 }
708 }
709
710 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
711 JNI_END
712
713
714 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
715 JNIWrapper("ExceptionClear");
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
718
719 // The jni code might be using this API to clear java thrown exception.
720 // So just mark jvmti thread exception state as exception caught.
721 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
722 if (state != NULL && state->is_exception_detected()) {
723 state->set_exception_caught();
724 }
725 thread->clear_pending_exception();
726
727 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
728 JNI_END
729
730
731 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
732 JNIWrapper("FatalError");
733
734 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
735
736 tty->print_cr("FATAL ERROR in native method: %s", msg);
737 thread->print_stack();
738 os::abort(); // Dump core and abort
739 JNI_END
740
741
742 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
743 JNIWrapper("PushLocalFrame");
744
745 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
746
747 //%note jni_11
748 if (capacity < 0 ||
749 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
750 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
751 return JNI_ERR;
752 }
753 JNIHandleBlock* old_handles = thread->active_handles();
754 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
755 assert(new_handles != NULL, "should not be NULL");
756 new_handles->set_pop_frame_link(old_handles);
757 thread->set_active_handles(new_handles);
758 jint ret = JNI_OK;
759 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
760 return ret;
761 JNI_END
762
763
764 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
765 JNIWrapper("PopLocalFrame");
766
767 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
768
769 //%note jni_11
770 Handle result_handle(thread, JNIHandles::resolve(result));
771 JNIHandleBlock* old_handles = thread->active_handles();
772 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
773 if (new_handles != NULL) {
774 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
775 // This way code will still work if PopLocalFrame is called without a corresponding
776 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
777 // the release_block call will release the blocks.
778 thread->set_active_handles(new_handles);
779 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
780 JNIHandleBlock::release_block(old_handles, thread); // may block
781 result = JNIHandles::make_local(thread, result_handle());
782 }
783 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
784 return result;
785 JNI_END
786
787
788 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
789 JNIWrapper("NewGlobalRef");
790
791 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
792
793 Handle ref_handle(thread, JNIHandles::resolve(ref));
794 jobject ret = JNIHandles::make_global(ref_handle);
795
796 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
797 return ret;
798 JNI_END
799
800 // Must be JNI_ENTRY (with HandleMark)
801 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
802 JNIWrapper("DeleteGlobalRef");
803
804 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
805
806 JNIHandles::destroy_global(ref);
807
808 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
812 JNIWrapper("DeleteLocalRef");
813
814 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
815
816 JNIHandles::destroy_local(obj);
817
818 HOTSPOT_JNI_DELETELOCALREF_RETURN();
819 JNI_END
820
821 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
822 JNIWrapper("IsSameObject");
823
824 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
825
826 oop a = JNIHandles::resolve(r1);
827 oop b = JNIHandles::resolve(r2);
828 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
829
830 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
831 return ret;
832 JNI_END
833
834
835 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
836 JNIWrapper("NewLocalRef");
837
838 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
839
840 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
841
842 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
843 return ret;
844 JNI_END
845
846 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
847 JNIWrapper("EnsureLocalCapacity");
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
850
851 jint ret;
852 if (capacity >= 0 &&
853 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
854 ret = JNI_OK;
855 } else {
856 ret = JNI_ERR;
857 }
858
859 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
860 return ret;
861 JNI_END
862
863 // Return the Handle Type
864 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
865 JNIWrapper("GetObjectRefType");
866
867 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
868
869 jobjectRefType ret;
870 if (JNIHandles::is_local_handle(thread, obj) ||
871 JNIHandles::is_frame_handle(thread, obj))
872 ret = JNILocalRefType;
873 else if (JNIHandles::is_global_handle(obj))
874 ret = JNIGlobalRefType;
875 else if (JNIHandles::is_weak_global_handle(obj))
876 ret = JNIWeakGlobalRefType;
877 else
878 ret = JNIInvalidRefType;
879
880 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
881 return ret;
882 JNI_END
883
884
885 class JNI_ArgumentPusher : public SignatureIterator {
886 protected:
887 JavaCallArguments* _arguments;
888
889 virtual void get_bool () = 0;
890 virtual void get_char () = 0;
891 virtual void get_short () = 0;
892 virtual void get_byte () = 0;
893 virtual void get_int () = 0;
894 virtual void get_long () = 0;
895 virtual void get_float () = 0;
896 virtual void get_double () = 0;
897 virtual void get_object () = 0;
898
899 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
900 this->_return_type = T_ILLEGAL;
901 _arguments = NULL;
902 }
903
904 public:
905 virtual void iterate( uint64_t fingerprint ) = 0;
906
907 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
908
909 inline void do_bool() { if (!is_return_type()) get_bool(); }
910 inline void do_char() { if (!is_return_type()) get_char(); }
911 inline void do_short() { if (!is_return_type()) get_short(); }
912 inline void do_byte() { if (!is_return_type()) get_byte(); }
913 inline void do_int() { if (!is_return_type()) get_int(); }
914 inline void do_long() { if (!is_return_type()) get_long(); }
915 inline void do_float() { if (!is_return_type()) get_float(); }
916 inline void do_double() { if (!is_return_type()) get_double(); }
917 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
918 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
919 inline void do_void() { }
920
921 JavaCallArguments* arguments() { return _arguments; }
922 void push_receiver(Handle h) { _arguments->push_oop(h); }
923 };
924
925
926 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
927 protected:
928 va_list _ap;
929
930 inline void get_bool() {
931 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
932 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
933 // TemplateInterpreterGenerator::generate_result_handler_for and
934 // SharedRuntime::generate_native_wrapper.
935 jboolean b = va_arg(_ap, jint);
936 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
937 }
938 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
939 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
940 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
941 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
942
943 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
944
945 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
946 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
947 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
948 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
949
950 inline void set_ap(va_list rap) {
951 va_copy(_ap, rap);
952 }
953
954 public:
955 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
956 : JNI_ArgumentPusher(signature) {
957 set_ap(rap);
958 }
959 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
960 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
961 set_ap(rap);
962 }
963
964 // Optimized path if we have the bitvector form of signature
965 void iterate( uint64_t fingerprint ) {
966 if (fingerprint == (uint64_t)CONST64(-1)) {
967 SignatureIterator::iterate(); // Must be too many arguments
968 } else {
969 _return_type = (BasicType)((fingerprint >> static_feature_size) &
970 result_feature_mask);
971
972 assert(fingerprint, "Fingerprint should not be 0");
973 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
974 while ( 1 ) {
975 switch ( fingerprint & parameter_feature_mask ) {
976 case bool_parm:
977 get_bool();
978 break;
979 case char_parm:
980 get_char();
981 break;
982 case short_parm:
983 get_short();
984 break;
985 case byte_parm:
986 get_byte();
987 break;
988 case int_parm:
989 get_int();
990 break;
991 case obj_parm:
992 get_object();
993 break;
994 case long_parm:
995 get_long();
996 break;
997 case float_parm:
998 get_float();
999 break;
1000 case double_parm:
1001 get_double();
1002 break;
1003 case done_parm:
1004 return;
1005 break;
1006 default:
1007 ShouldNotReachHere();
1008 break;
1009 }
1010 fingerprint >>= parameter_feature_size;
1011 }
1012 }
1013 }
1014 };
1015
1016
1017 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1018 protected:
1019 const jvalue *_ap;
1020
1021 inline void get_bool() {
1022 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1023 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1024 // TemplateInterpreterGenerator::generate_result_handler_for and
1025 // SharedRuntime::generate_native_wrapper.
1026 jboolean b = (_ap++)->z;
1027 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1028 }
1029 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1030 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1031 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1032 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1033
1034 inline void get_long() { _arguments->push_long((_ap++)->j); }
1035 inline void get_float() { _arguments->push_float((_ap++)->f); }
1036 inline void get_double() { _arguments->push_double((_ap++)->d);}
1037 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1038
1039 inline void set_ap(const jvalue *rap) { _ap = rap; }
1040
1041 public:
1042 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1043 : JNI_ArgumentPusher(signature) {
1044 set_ap(rap);
1045 }
1046 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1047 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1048 set_ap(rap);
1049 }
1050
1051 // Optimized path if we have the bitvector form of signature
1052 void iterate( uint64_t fingerprint ) {
1053 if (fingerprint == (uint64_t)CONST64(-1)) {
1054 SignatureIterator::iterate(); // Must be too many arguments
1055 } else {
1056 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1057 result_feature_mask);
1058 assert(fingerprint, "Fingerprint should not be 0");
1059 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1060 while ( 1 ) {
1061 switch ( fingerprint & parameter_feature_mask ) {
1062 case bool_parm:
1063 get_bool();
1064 break;
1065 case char_parm:
1066 get_char();
1067 break;
1068 case short_parm:
1069 get_short();
1070 break;
1071 case byte_parm:
1072 get_byte();
1073 break;
1074 case int_parm:
1075 get_int();
1076 break;
1077 case obj_parm:
1078 get_object();
1079 break;
1080 case long_parm:
1081 get_long();
1082 break;
1083 case float_parm:
1084 get_float();
1085 break;
1086 case double_parm:
1087 get_double();
1088 break;
1089 case done_parm:
1090 return;
1091 break;
1092 default:
1093 ShouldNotReachHere();
1094 break;
1095 }
1096 fingerprint >>= parameter_feature_size;
1097 }
1098 }
1099 }
1100 };
1101
1102
1103 enum JNICallType {
1104 JNI_STATIC,
1105 JNI_VIRTUAL,
1106 JNI_NONVIRTUAL
1107 };
1108
1109
1110
1111 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1112 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1113
1114 // Create object to hold arguments for the JavaCall, and associate it with
1115 // the jni parser
1116 ResourceMark rm(THREAD);
1117 int number_of_parameters = method->size_of_parameters();
1118 JavaCallArguments java_args(number_of_parameters);
1119 args->set_java_argument_object(&java_args);
1120
1121 assert(method->is_static(), "method should be static");
1122
1123 // Fill out JavaCallArguments object
1124 args->iterate( Fingerprinter(method).fingerprint() );
1125 // Initialize result type
1126 result->set_type(args->get_ret_type());
1127
1128 // Invoke the method. Result is returned as oop.
1129 JavaCalls::call(result, method, &java_args, CHECK);
1130
1131 // Convert result
1132 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1133 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1134 }
1135 }
1136
1137
1138 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1139 oop recv = JNIHandles::resolve(receiver);
1140 if (recv == NULL) {
1141 THROW(vmSymbols::java_lang_NullPointerException());
1142 }
1143 Handle h_recv(THREAD, recv);
1144
1145 int number_of_parameters;
1146 Method* selected_method;
1147 {
1148 Method* m = Method::resolve_jmethod_id(method_id);
1149 number_of_parameters = m->size_of_parameters();
1150 Klass* holder = m->method_holder();
1151 if (call_type != JNI_VIRTUAL) {
1152 selected_method = m;
1153 } else if (!m->has_itable_index()) {
1154 // non-interface call -- for that little speed boost, don't handlize
1155 debug_only(NoSafepointVerifier nosafepoint;)
1156 // jni_GetMethodID makes sure class is linked and initialized
1157 // so m should have a valid vtable index.
1158 assert(m->valid_vtable_index(), "no valid vtable index");
1159 int vtbl_index = m->vtable_index();
1160 if (vtbl_index != Method::nonvirtual_vtable_index) {
1161 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1162 } else {
1163 // final method
1164 selected_method = m;
1165 }
1166 } else {
1167 // interface call
1168 int itbl_index = m->itable_index();
1169 Klass* k = h_recv->klass();
1170 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1171 }
1172 }
1173
1174 methodHandle method(THREAD, selected_method);
1175
1176 // Create object to hold arguments for the JavaCall, and associate it with
1177 // the jni parser
1178 ResourceMark rm(THREAD);
1179 JavaCallArguments java_args(number_of_parameters);
1180 args->set_java_argument_object(&java_args);
1181
1182 // handle arguments
1183 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1184 args->push_receiver(h_recv); // Push jobject handle
1185
1186 // Fill out JavaCallArguments object
1187 args->iterate( Fingerprinter(method).fingerprint() );
1188 // Initialize result type
1189 result->set_type(args->get_ret_type());
1190
1191 // Invoke the method. Result is returned as oop.
1192 JavaCalls::call(result, method, &java_args, CHECK);
1193
1194 // Convert result
1195 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1196 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1197 }
1198 }
1199
1200
1201 static instanceOop alloc_object(jclass clazz, TRAPS) {
1202 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1203 if (k == NULL) {
1204 ResourceMark rm(THREAD);
1205 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1206 }
1207 k->check_valid_for_instantiation(false, CHECK_NULL);
1208 k->initialize(CHECK_NULL);
1209 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1210 return ih;
1211 }
1212
1213 DT_RETURN_MARK_DECL(AllocObject, jobject
1214 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1215
1216 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1217 JNIWrapper("AllocObject");
1218
1219 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1220
1221 jobject ret = NULL;
1222 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1223
1224 instanceOop i = alloc_object(clazz, CHECK_NULL);
1225 ret = JNIHandles::make_local(env, i);
1226 return ret;
1227 JNI_END
1228
1229 DT_RETURN_MARK_DECL(NewObjectA, jobject
1230 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1231
1232 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1233 JNIWrapper("NewObjectA");
1234
1235 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1236
1237 jobject obj = NULL;
1238 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1239
1240 instanceOop i = alloc_object(clazz, CHECK_NULL);
1241 obj = JNIHandles::make_local(env, i);
1242 JavaValue jvalue(T_VOID);
1243 JNI_ArgumentPusherArray ap(methodID, args);
1244 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1245 return obj;
1246 JNI_END
1247
1248
1249 DT_RETURN_MARK_DECL(NewObjectV, jobject
1250 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1251
1252 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1253 JNIWrapper("NewObjectV");
1254
1255 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1256
1257 jobject obj = NULL;
1258 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1259
1260 instanceOop i = alloc_object(clazz, CHECK_NULL);
1261 obj = JNIHandles::make_local(env, i);
1262 JavaValue jvalue(T_VOID);
1263 JNI_ArgumentPusherVaArg ap(methodID, args);
1264 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1265 return obj;
1266 JNI_END
1267
1268
1269 DT_RETURN_MARK_DECL(NewObject, jobject
1270 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1271
1272 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1273 JNIWrapper("NewObject");
1274
1275 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1276
1277 jobject obj = NULL;
1278 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1279
1280 instanceOop i = alloc_object(clazz, CHECK_NULL);
1281 obj = JNIHandles::make_local(env, i);
1282 va_list args;
1283 va_start(args, methodID);
1284 JavaValue jvalue(T_VOID);
1285 JNI_ArgumentPusherVaArg ap(methodID, args);
1286 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1287 va_end(args);
1288 return obj;
1289 JNI_END
1290
1291
1292 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1293 JNIWrapper("GetObjectClass");
1294
1295 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1296
1297 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1298 jclass ret =
1299 (jclass) JNIHandles::make_local(env, k->java_mirror());
1300
1301 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1302 return ret;
1303 JNI_END
1304
1305 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1306 JNIWrapper("IsInstanceOf");
1307
1308 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1309
1310 jboolean ret = JNI_TRUE;
1311 if (obj != NULL) {
1312 ret = JNI_FALSE;
1313 Klass* k = java_lang_Class::as_Klass(
1314 JNIHandles::resolve_non_null(clazz));
1315 if (k != NULL) {
1316 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1317 }
1318 }
1319
1320 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1321 return ret;
1322 JNI_END
1323
1324
1325 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1326 const char *sig, bool is_static, TRAPS) {
1327 // %%%% This code should probably just call into a method in the LinkResolver
1328 //
1329 // The class should have been loaded (we have an instance of the class
1330 // passed in) so the method and signature should already be in the symbol
1331 // table. If they're not there, the method doesn't exist.
1332 const char *name_to_probe = (name_str == NULL)
1333 ? vmSymbols::object_initializer_name()->as_C_string()
1334 : name_str;
1335 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1336 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1337
1338 if (name == NULL || signature == NULL) {
1339 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1340 }
1341
1342 // Throw a NoSuchMethodError exception if we have an instance of a
1343 // primitive java.lang.Class
1344 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1345 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1346 }
1347
1348 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1349
1350 // Make sure class is linked and initialized before handing id's out to
1351 // Method*s.
1352 klass->initialize(CHECK_NULL);
1353
1354 Method* m;
1355 if (name == vmSymbols::object_initializer_name() ||
1356 name == vmSymbols::class_initializer_name()) {
1357 // Never search superclasses for constructors
1358 if (klass->is_instance_klass()) {
1359 m = InstanceKlass::cast(klass)->find_method(name, signature);
1360 } else {
1361 m = NULL;
1362 }
1363 } else {
1364 m = klass->lookup_method(name, signature);
1365 if (m == NULL && klass->is_instance_klass()) {
1366 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1367 }
1368 }
1369 if (m == NULL || (m->is_static() != is_static)) {
1370 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1371 }
1372 return m->jmethod_id();
1373 }
1374
1375
1376 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1377 const char *name, const char *sig))
1378 JNIWrapper("GetMethodID");
1379 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1380 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1381 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1382 return ret;
1383 JNI_END
1384
1385
1386 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1387 const char *name, const char *sig))
1388 JNIWrapper("GetStaticMethodID");
1389 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1390 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1391 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1392 return ret;
1393 JNI_END
1394
1395
1396
1397 //
1398 // Calling Methods
1399 //
1400
1401
1402 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1403 , EntryProbe, ReturnProbe) \
1404 \
1405 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1406 , ReturnProbe); \
1407 \
1408 JNI_ENTRY(ResultType, \
1409 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1410 JNIWrapper("Call" XSTR(Result) "Method"); \
1411 \
1412 EntryProbe; \
1413 ResultType ret = 0;\
1414 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1415 (const ResultType&)ret);\
1416 \
1417 va_list args; \
1418 va_start(args, methodID); \
1419 JavaValue jvalue(Tag); \
1420 JNI_ArgumentPusherVaArg ap(methodID, args); \
1421 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1422 va_end(args); \
1423 ret = jvalue.get_##ResultType(); \
1424 return ret;\
1425 JNI_END
1426
1427 // the runtime type of subword integral basic types is integer
1428 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1429 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1431 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1432 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1434 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1435 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1438 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1440
1441 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1442 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1444 DEFINE_CALLMETHOD(jint, Int, T_INT,
1445 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1447 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1448 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1450 // Float and double probes don't return value because dtrace doesn't currently support it
1451 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1452 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1453 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1454 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1455 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1457
1458 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1459 , EntryProbe, ReturnProbe) \
1460 \
1461 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1462 , ReturnProbe); \
1463 \
1464 JNI_ENTRY(ResultType, \
1465 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1466 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1467 \
1468 EntryProbe;\
1469 ResultType ret = 0;\
1470 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1471 (const ResultType&)ret);\
1472 \
1473 JavaValue jvalue(Tag); \
1474 JNI_ArgumentPusherVaArg ap(methodID, args); \
1475 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1476 ret = jvalue.get_##ResultType(); \
1477 return ret;\
1478 JNI_END
1479
1480 // the runtime type of subword integral basic types is integer
1481 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1482 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1485 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1487 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1488 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1491 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1493
1494 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1495 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1497 DEFINE_CALLMETHODV(jint, Int, T_INT,
1498 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1500 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1501 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1503 // Float and double probes don't return value because dtrace doesn't currently support it
1504 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1505 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1506 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1507 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1508 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1509 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1510
1511 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1512 , EntryProbe, ReturnProbe) \
1513 \
1514 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1515 , ReturnProbe); \
1516 \
1517 JNI_ENTRY(ResultType, \
1518 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1519 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1520 EntryProbe; \
1521 ResultType ret = 0;\
1522 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1523 (const ResultType&)ret);\
1524 \
1525 JavaValue jvalue(Tag); \
1526 JNI_ArgumentPusherArray ap(methodID, args); \
1527 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1528 ret = jvalue.get_##ResultType(); \
1529 return ret;\
1530 JNI_END
1531
1532 // the runtime type of subword integral basic types is integer
1533 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1534 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1537 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1539 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1540 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1543 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1545
1546 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1547 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1549 DEFINE_CALLMETHODA(jint, Int, T_INT,
1550 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1552 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1553 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1555 // Float and double probes don't return value because dtrace doesn't currently support it
1556 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1557 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1558 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1559 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1560 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1561 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1562
1563 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1564 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1566
1567
1568 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1569 JNIWrapper("CallVoidMethod");
1570 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1571 DT_VOID_RETURN_MARK(CallVoidMethod);
1572
1573 va_list args;
1574 va_start(args, methodID);
1575 JavaValue jvalue(T_VOID);
1576 JNI_ArgumentPusherVaArg ap(methodID, args);
1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1578 va_end(args);
1579 JNI_END
1580
1581
1582 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1583 JNIWrapper("CallVoidMethodV");
1584 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1585 DT_VOID_RETURN_MARK(CallVoidMethodV);
1586
1587 JavaValue jvalue(T_VOID);
1588 JNI_ArgumentPusherVaArg ap(methodID, args);
1589 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1590 JNI_END
1591
1592
1593 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1594 JNIWrapper("CallVoidMethodA");
1595 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1596 DT_VOID_RETURN_MARK(CallVoidMethodA);
1597
1598 JavaValue jvalue(T_VOID);
1599 JNI_ArgumentPusherArray ap(methodID, args);
1600 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1601 JNI_END
1602
1603
1604
1605 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1606 , EntryProbe, ReturnProbe) \
1607 \
1608 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1609 , ReturnProbe);\
1610 \
1611 JNI_ENTRY(ResultType, \
1612 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1613 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1614 \
1615 EntryProbe;\
1616 ResultType ret;\
1617 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1618 (const ResultType&)ret);\
1619 \
1620 va_list args; \
1621 va_start(args, methodID); \
1622 JavaValue jvalue(Tag); \
1623 JNI_ArgumentPusherVaArg ap(methodID, args); \
1624 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1625 va_end(args); \
1626 ret = jvalue.get_##ResultType(); \
1627 return ret;\
1628 JNI_END
1629
1630 // the runtime type of subword integral basic types is integer
1631 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1632 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1635 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1637 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1638 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1641 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1643
1644 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1645 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1646 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1647 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1648 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1650 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1651 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 // Float and double probes don't return value because dtrace doesn't currently support it
1653 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1654 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1655 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1656 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1657 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1658 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1660
1661 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1662 , EntryProbe, ReturnProbe) \
1663 \
1664 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1665 , ReturnProbe);\
1666 \
1667 JNI_ENTRY(ResultType, \
1668 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1669 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1670 \
1671 EntryProbe;\
1672 ResultType ret;\
1673 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1674 (const ResultType&)ret);\
1675 \
1676 JavaValue jvalue(Tag); \
1677 JNI_ArgumentPusherVaArg ap(methodID, args); \
1678 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1679 ret = jvalue.get_##ResultType(); \
1680 return ret;\
1681 JNI_END
1682
1683 // the runtime type of subword integral basic types is integer
1684 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1685 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1688 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1690 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1691 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1694 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1696
1697 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1698 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1699 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1700 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1701 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1703 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1704 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 // Float and double probes don't return value because dtrace doesn't currently support it
1706 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1707 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1708 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1709 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1710 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1711 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1712 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1713
1714 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1715 , EntryProbe, ReturnProbe) \
1716 \
1717 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1718 , ReturnProbe);\
1719 \
1720 JNI_ENTRY(ResultType, \
1721 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1722 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1723 \
1724 EntryProbe;\
1725 ResultType ret;\
1726 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1727 (const ResultType&)ret);\
1728 \
1729 JavaValue jvalue(Tag); \
1730 JNI_ArgumentPusherArray ap(methodID, args); \
1731 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1732 ret = jvalue.get_##ResultType(); \
1733 return ret;\
1734 JNI_END
1735
1736 // the runtime type of subword integral basic types is integer
1737 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1738 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1741 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1743 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1744 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1747 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1749
1750 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1751 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1752 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1753 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1754 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1756 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1757 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 // Float and double probes don't return value because dtrace doesn't currently support it
1759 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1760 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1761 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1762 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1763 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1764 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1765 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1766
1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1768 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1769 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1770 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1771 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1772 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1773
1774 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1775 JNIWrapper("CallNonvirtualVoidMethod");
1776
1777 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1778 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1779
1780 va_list args;
1781 va_start(args, methodID);
1782 JavaValue jvalue(T_VOID);
1783 JNI_ArgumentPusherVaArg ap(methodID, args);
1784 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1785 va_end(args);
1786 JNI_END
1787
1788
1789 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1790 JNIWrapper("CallNonvirtualVoidMethodV");
1791
1792 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1793 env, obj, cls, (uintptr_t) methodID);
1794 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1795
1796 JavaValue jvalue(T_VOID);
1797 JNI_ArgumentPusherVaArg ap(methodID, args);
1798 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1799 JNI_END
1800
1801
1802 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1803 JNIWrapper("CallNonvirtualVoidMethodA");
1804 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1805 env, obj, cls, (uintptr_t) methodID);
1806 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1807 JavaValue jvalue(T_VOID);
1808 JNI_ArgumentPusherArray ap(methodID, args);
1809 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1810 JNI_END
1811
1812
1813
1814 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1815 , EntryProbe, ResultProbe) \
1816 \
1817 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1818 , ResultProbe); \
1819 \
1820 JNI_ENTRY(ResultType, \
1821 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1822 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1823 \
1824 EntryProbe; \
1825 ResultType ret = 0;\
1826 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1827 (const ResultType&)ret);\
1828 \
1829 va_list args; \
1830 va_start(args, methodID); \
1831 JavaValue jvalue(Tag); \
1832 JNI_ArgumentPusherVaArg ap(methodID, args); \
1833 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1834 va_end(args); \
1835 ret = jvalue.get_##ResultType(); \
1836 return ret;\
1837 JNI_END
1838
1839 // the runtime type of subword integral basic types is integer
1840 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1841 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1843 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1844 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1846 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1847 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1850 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1852
1853 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1854 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1855 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1856 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1857 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1859 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1860 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1862 // Float and double probes don't return value because dtrace doesn't currently support it
1863 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1864 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1865 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1866 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1867 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1868 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1869
1870 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1871 , EntryProbe, ResultProbe) \
1872 \
1873 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1874 , ResultProbe); \
1875 \
1876 JNI_ENTRY(ResultType, \
1877 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1878 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1879 \
1880 EntryProbe; \
1881 ResultType ret = 0;\
1882 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1883 (const ResultType&)ret);\
1884 \
1885 JavaValue jvalue(Tag); \
1886 JNI_ArgumentPusherVaArg ap(methodID, args); \
1887 /* Make sure class is initialized before trying to invoke its method */ \
1888 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1889 k->initialize(CHECK_0); \
1890 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1891 va_end(args); \
1892 ret = jvalue.get_##ResultType(); \
1893 return ret;\
1894 JNI_END
1895
1896 // the runtime type of subword integral basic types is integer
1897 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1898 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1900 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1901 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1903 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1904 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1907 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1909
1910 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1911 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1912 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1913 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1914 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1916 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1917 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1919 // Float and double probes don't return value because dtrace doesn't currently support it
1920 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1921 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1922 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1923 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1924 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1925 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1926
1927 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1928 , EntryProbe, ResultProbe) \
1929 \
1930 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1931 , ResultProbe); \
1932 \
1933 JNI_ENTRY(ResultType, \
1934 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1935 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1936 \
1937 EntryProbe; \
1938 ResultType ret = 0;\
1939 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1940 (const ResultType&)ret);\
1941 \
1942 JavaValue jvalue(Tag); \
1943 JNI_ArgumentPusherArray ap(methodID, args); \
1944 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1945 ret = jvalue.get_##ResultType(); \
1946 return ret;\
1947 JNI_END
1948
1949 // the runtime type of subword integral basic types is integer
1950 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1951 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1954 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1956 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1957 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1960 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1962
1963 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1964 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1965 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1966 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1967 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1969 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1970 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1972 // Float and double probes don't return value because dtrace doesn't currently support it
1973 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1974 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1975 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1976 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1977 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1978 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1979
1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1981 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1982 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1983 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1984 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1985 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1986
1987 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1988 JNIWrapper("CallStaticVoidMethod");
1989 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1990 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1991
1992 va_list args;
1993 va_start(args, methodID);
1994 JavaValue jvalue(T_VOID);
1995 JNI_ArgumentPusherVaArg ap(methodID, args);
1996 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1997 va_end(args);
1998 JNI_END
1999
2000
2001 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2002 JNIWrapper("CallStaticVoidMethodV");
2003 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2004 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2005
2006 JavaValue jvalue(T_VOID);
2007 JNI_ArgumentPusherVaArg ap(methodID, args);
2008 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2009 JNI_END
2010
2011
2012 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2013 JNIWrapper("CallStaticVoidMethodA");
2014 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2015 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2016
2017 JavaValue jvalue(T_VOID);
2018 JNI_ArgumentPusherArray ap(methodID, args);
2019 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2020 JNI_END
2021
2022
2023 //
2024 // Accessing Fields
2025 //
2026
2027
2028 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2029 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2030
2031 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2032 const char *name, const char *sig))
2033 JNIWrapper("GetFieldID");
2034 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2035 jfieldID ret = 0;
2036 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2037
2038 // The class should have been loaded (we have an instance of the class
2039 // passed in) so the field and signature should already be in the symbol
2040 // table. If they're not there, the field doesn't exist.
2041 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2042 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2043 if (fieldname == NULL || signame == NULL) {
2044 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2045 }
2046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2047 // Make sure class is initialized before handing id's out to fields
2048 k->initialize(CHECK_NULL);
2049
2050 fieldDescriptor fd;
2051 if (!k->is_instance_klass() ||
2052 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2053 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2054 }
2055
2056 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2057 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2058 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2059 return ret;
2060 JNI_END
2061
2062
2063 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2064 JNIWrapper("GetObjectField");
2065 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2066 oop o = JNIHandles::resolve_non_null(obj);
2067 Klass* k = o->klass();
2068 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2069 // Keep JVMTI addition small and only check enabled flag here.
2070 // jni_GetField_probe() assumes that is okay to create handles.
2071 if (JvmtiExport::should_post_field_access()) {
2072 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2073 }
2074 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2075 #if INCLUDE_ALL_GCS
2076 // If G1 is enabled and we are accessing the value of the referent
2077 // field in a reference object then we need to register a non-null
2078 // referent with the SATB barrier.
2079 if (UseG1GC) {
2080 bool needs_barrier = false;
2081
2082 if (ret != NULL &&
2083 offset == java_lang_ref_Reference::referent_offset &&
2084 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2085 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2086 needs_barrier = true;
2087 }
2088
2089 if (needs_barrier) {
2090 oop referent = JNIHandles::resolve(ret);
2091 G1SATBCardTableModRefBS::enqueue(referent);
2092 }
2093 }
2094 #endif // INCLUDE_ALL_GCS
2095 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2096 return ret;
2097 JNI_END
2098
2099
2100
2101 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2102 , EntryProbe, ReturnProbe) \
2103 \
2104 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2105 , ReturnProbe); \
2106 \
2107 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2108 JNIWrapper("Get" XSTR(Result) "Field"); \
2109 \
2110 EntryProbe; \
2111 Return ret = 0;\
2112 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2113 \
2114 oop o = JNIHandles::resolve_non_null(obj); \
2115 Klass* k = o->klass(); \
2116 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2117 /* Keep JVMTI addition small and only check enabled flag here. */ \
2118 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2119 /* and creates a ResetNoHandleMark. */ \
2120 if (JvmtiExport::should_post_field_access()) { \
2121 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2122 } \
2123 ret = o->Fieldname##_field(offset); \
2124 return ret; \
2125 JNI_END
2126
2127 DEFINE_GETFIELD(jboolean, bool, Boolean
2128 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2130 DEFINE_GETFIELD(jbyte, byte, Byte
2131 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jchar, char, Char
2134 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2136 DEFINE_GETFIELD(jshort, short, Short
2137 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2139 DEFINE_GETFIELD(jint, int, Int
2140 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2142 DEFINE_GETFIELD(jlong, long, Long
2143 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2144 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2145 // Float and double probes don't return value because dtrace doesn't currently support it
2146 DEFINE_GETFIELD(jfloat, float, Float
2147 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2148 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2149 DEFINE_GETFIELD(jdouble, double, Double
2150 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2151 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2152
2153 address jni_GetBooleanField_addr() {
2154 return (address)jni_GetBooleanField;
2155 }
2156 address jni_GetByteField_addr() {
2157 return (address)jni_GetByteField;
2158 }
2159 address jni_GetCharField_addr() {
2160 return (address)jni_GetCharField;
2161 }
2162 address jni_GetShortField_addr() {
2163 return (address)jni_GetShortField;
2164 }
2165 address jni_GetIntField_addr() {
2166 return (address)jni_GetIntField;
2167 }
2168 address jni_GetLongField_addr() {
2169 return (address)jni_GetLongField;
2170 }
2171 address jni_GetFloatField_addr() {
2172 return (address)jni_GetFloatField;
2173 }
2174 address jni_GetDoubleField_addr() {
2175 return (address)jni_GetDoubleField;
2176 }
2177
2178 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2179 JNIWrapper("SetObjectField");
2180 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2181 oop o = JNIHandles::resolve_non_null(obj);
2182 Klass* k = o->klass();
2183 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2184 // Keep JVMTI addition small and only check enabled flag here.
2185 // jni_SetField_probe_nh() assumes that is not okay to create handles
2186 // and creates a ResetNoHandleMark.
2187 if (JvmtiExport::should_post_field_modification()) {
2188 jvalue field_value;
2189 field_value.l = value;
2190 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2191 }
2192 o->obj_field_put(offset, JNIHandles::resolve(value));
2193 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2194 JNI_END
2195
2196
2197 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2198 , EntryProbe, ReturnProbe) \
2199 \
2200 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2201 JNIWrapper("Set" XSTR(Result) "Field"); \
2202 \
2203 EntryProbe; \
2204 \
2205 oop o = JNIHandles::resolve_non_null(obj); \
2206 Klass* k = o->klass(); \
2207 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2208 /* Keep JVMTI addition small and only check enabled flag here. */ \
2209 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2210 /* and creates a ResetNoHandleMark. */ \
2211 if (JvmtiExport::should_post_field_modification()) { \
2212 jvalue field_value; \
2213 field_value.unionType = value; \
2214 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2215 } \
2216 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2217 o->Fieldname##_field_put(offset, value); \
2218 ReturnProbe; \
2219 JNI_END
2220
2221 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2222 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2223 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2224 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2225 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2226 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2227 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2228 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2230 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2231 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2232 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2233 DEFINE_SETFIELD(jint, int, Int, 'I', i
2234 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2235 HOTSPOT_JNI_SETINTFIELD_RETURN())
2236 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2237 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2238 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2239 // Float and double probes don't return value because dtrace doesn't currently support it
2240 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2241 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2242 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2243 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2244 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2245 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2246
2247 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2248 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2249
2250 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2251 JNIWrapper("ToReflectedField");
2252 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2253 jobject ret = NULL;
2254 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2255
2256 fieldDescriptor fd;
2257 bool found = false;
2258 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2259
2260 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2261
2262 if (isStatic) {
2263 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2264 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2265 assert(id->is_static_field_id(), "invalid static field id");
2266 found = id->find_local_field(&fd);
2267 } else {
2268 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2269 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2270 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2271 }
2272 assert(found, "bad fieldID passed into jni_ToReflectedField");
2273 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2274 ret = JNIHandles::make_local(env, reflected);
2275 return ret;
2276 JNI_END
2277
2278
2279 //
2280 // Accessing Static Fields
2281 //
2282 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2283 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2284
2285 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2286 const char *name, const char *sig))
2287 JNIWrapper("GetStaticFieldID");
2288 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2289 jfieldID ret = NULL;
2290 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2291
2292 // The class should have been loaded (we have an instance of the class
2293 // passed in) so the field and signature should already be in the symbol
2294 // table. If they're not there, the field doesn't exist.
2295 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2296 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2297 if (fieldname == NULL || signame == NULL) {
2298 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2299 }
2300 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2301 // Make sure class is initialized before handing id's out to static fields
2302 k->initialize(CHECK_NULL);
2303
2304 fieldDescriptor fd;
2305 if (!k->is_instance_klass() ||
2306 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2307 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2308 }
2309
2310 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2311 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2312 debug_only(id->set_is_static_field_id();)
2313
2314 debug_only(id->verify(fd.field_holder()));
2315
2316 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2317 return ret;
2318 JNI_END
2319
2320
2321 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2322 JNIWrapper("GetStaticObjectField");
2323 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2324 #if INCLUDE_JNI_CHECK
2325 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2326 #endif // INCLUDE_JNI_CHECK
2327 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2328 assert(id->is_static_field_id(), "invalid static field id");
2329 // Keep JVMTI addition small and only check enabled flag here.
2330 // jni_GetField_probe() assumes that is okay to create handles.
2331 if (JvmtiExport::should_post_field_access()) {
2332 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2333 }
2334 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2335 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2336 return ret;
2337 JNI_END
2338
2339
2340 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2341 , EntryProbe, ReturnProbe) \
2342 \
2343 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2344 , ReturnProbe); \
2345 \
2346 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2347 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2348 EntryProbe; \
2349 Return ret = 0;\
2350 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2351 (const Return&)ret);\
2352 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2353 assert(id->is_static_field_id(), "invalid static field id"); \
2354 /* Keep JVMTI addition small and only check enabled flag here. */ \
2355 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2356 if (JvmtiExport::should_post_field_access()) { \
2357 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2358 } \
2359 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2360 return ret;\
2361 JNI_END
2362
2363 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2364 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2365 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2366 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2367 DEFINE_GETSTATICFIELD(jchar, char, Char
2368 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2369 DEFINE_GETSTATICFIELD(jshort, short, Short
2370 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2371 DEFINE_GETSTATICFIELD(jint, int, Int
2372 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2373 DEFINE_GETSTATICFIELD(jlong, long, Long
2374 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2375 // Float and double probes don't return value because dtrace doesn't currently support it
2376 DEFINE_GETSTATICFIELD(jfloat, float, Float
2377 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2378 DEFINE_GETSTATICFIELD(jdouble, double, Double
2379 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2380
2381 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2382 JNIWrapper("SetStaticObjectField");
2383 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2384 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2385 assert(id->is_static_field_id(), "invalid static field id");
2386 // Keep JVMTI addition small and only check enabled flag here.
2387 // jni_SetField_probe() assumes that is okay to create handles.
2388 if (JvmtiExport::should_post_field_modification()) {
2389 jvalue field_value;
2390 field_value.l = value;
2391 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2392 }
2393 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2394 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2395 JNI_END
2396
2397
2398
2399 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2400 , EntryProbe, ReturnProbe) \
2401 \
2402 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2403 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2404 EntryProbe; \
2405 \
2406 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2407 assert(id->is_static_field_id(), "invalid static field id"); \
2408 /* Keep JVMTI addition small and only check enabled flag here. */ \
2409 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2410 if (JvmtiExport::should_post_field_modification()) { \
2411 jvalue field_value; \
2412 field_value.unionType = value; \
2413 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2414 } \
2415 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2416 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2417 ReturnProbe;\
2418 JNI_END
2419
2420 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2421 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2422 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2423 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2424 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2425 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2426 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2427 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2428 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2429 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2430 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2431 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2432 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2433 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2434 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2435 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2436 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2437 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2438 // Float and double probes don't return value because dtrace doesn't currently support it
2439 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2440 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2441 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2442 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2443 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2444 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2445
2446 //
2447 // String Operations
2448 //
2449
2450 // Unicode Interface
2451
2452 DT_RETURN_MARK_DECL(NewString, jstring
2453 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2454
2455 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2456 JNIWrapper("NewString");
2457 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2458 jstring ret = NULL;
2459 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2460 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2461 ret = (jstring) JNIHandles::make_local(env, string);
2462 return ret;
2463 JNI_END
2464
2465
2466 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2467 JNIWrapper("GetStringLength");
2468 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2469 jsize ret = 0;
2470 oop s = JNIHandles::resolve_non_null(string);
2471 if (java_lang_String::value(s) != NULL) {
2472 ret = java_lang_String::length(s);
2473 }
2474 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2475 return ret;
2476 JNI_END
2477
2478
2479 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2480 JNIEnv *env, jstring string, jboolean *isCopy))
2481 JNIWrapper("GetStringChars");
2482 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2483 jchar* buf = NULL;
2484 oop s = JNIHandles::resolve_non_null(string);
2485 typeArrayOop s_value = java_lang_String::value(s);
2486 if (s_value != NULL) {
2487 int s_len = java_lang_String::length(s);
2488 bool is_latin1 = java_lang_String::is_latin1(s);
2489 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2490 /* JNI Specification states return NULL on OOM */
2491 if (buf != NULL) {
2492 if (s_len > 0) {
2493 if (!is_latin1) {
2494 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2495 } else {
2496 for (int i = 0; i < s_len; i++) {
2497 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2498 }
2499 }
2500 }
2501 buf[s_len] = 0;
2502 //%note jni_5
2503 if (isCopy != NULL) {
2504 *isCopy = JNI_TRUE;
2505 }
2506 }
2507 }
2508 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2509 return buf;
2510 JNI_END
2511
2512
2513 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2514 JNIWrapper("ReleaseStringChars");
2515 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2516 //%note jni_6
2517 if (chars != NULL) {
2518 // Since String objects are supposed to be immutable, don't copy any
2519 // new data back. A bad user will have to go after the char array.
2520 FreeHeap((void*) chars);
2521 }
2522 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2523 JNI_END
2524
2525
2526 // UTF Interface
2527
2528 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2529 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2530
2531 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2532 JNIWrapper("NewStringUTF");
2533 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2534 jstring ret;
2535 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2536
2537 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2538 ret = (jstring) JNIHandles::make_local(env, result);
2539 return ret;
2540 JNI_END
2541
2542
2543 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2544 JNIWrapper("GetStringUTFLength");
2545 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2546 jsize ret = 0;
2547 oop java_string = JNIHandles::resolve_non_null(string);
2548 if (java_lang_String::value(java_string) != NULL) {
2549 ret = java_lang_String::utf8_length(java_string);
2550 }
2551 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2552 return ret;
2553 JNI_END
2554
2555
2556 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2557 JNIWrapper("GetStringUTFChars");
2558 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2559 char* result = NULL;
2560 oop java_string = JNIHandles::resolve_non_null(string);
2561 if (java_lang_String::value(java_string) != NULL) {
2562 size_t length = java_lang_String::utf8_length(java_string);
2563 /* JNI Specification states return NULL on OOM */
2564 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2565 if (result != NULL) {
2566 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2567 if (isCopy != NULL) {
2568 *isCopy = JNI_TRUE;
2569 }
2570 }
2571 }
2572 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2573 return result;
2574 JNI_END
2575
2576
2577 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2578 JNIWrapper("ReleaseStringUTFChars");
2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2580 if (chars != NULL) {
2581 FreeHeap((char*) chars);
2582 }
2583 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2584 JNI_END
2585
2586
2587 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2588 JNIWrapper("GetArrayLength");
2589 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2590 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2591 assert(a->is_array(), "must be array");
2592 jsize ret = a->length();
2593 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2594 return ret;
2595 JNI_END
2596
2597
2598 //
2599 // Object Array Operations
2600 //
2601
2602 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2603 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2604
2605 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2606 JNIWrapper("NewObjectArray");
2607 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2608 jobjectArray ret = NULL;
2609 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2610 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2611 Klass* ak = ek->array_klass(CHECK_NULL);
2612 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2613 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2614 oop initial_value = JNIHandles::resolve(initialElement);
2615 if (initial_value != NULL) { // array already initialized with NULL
2616 for (int index = 0; index < length; index++) {
2617 result->obj_at_put(index, initial_value);
2618 }
2619 }
2620 ret = (jobjectArray) JNIHandles::make_local(env, result);
2621 return ret;
2622 JNI_END
2623
2624 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2625 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2626
2627 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2628 JNIWrapper("GetObjectArrayElement");
2629 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2630 jobject ret = NULL;
2631 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2632 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2633 if (a->is_within_bounds(index)) {
2634 ret = JNIHandles::make_local(env, a->obj_at(index));
2635 return ret;
2636 } else {
2637 char buf[jintAsStringSize];
2638 sprintf(buf, "%d", index);
2639 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2640 }
2641 JNI_END
2642
2643 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2644 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2645
2646 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2647 JNIWrapper("SetObjectArrayElement");
2648 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2649 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2650
2651 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2652 oop v = JNIHandles::resolve(value);
2653 if (a->is_within_bounds(index)) {
2654 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2655 a->obj_at_put(index, v);
2656 } else {
2657 THROW(vmSymbols::java_lang_ArrayStoreException());
2658 }
2659 } else {
2660 char buf[jintAsStringSize];
2661 sprintf(buf, "%d", index);
2662 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2663 }
2664 JNI_END
2665
2666
2667
2668 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2669 ,EntryProbe,ReturnProbe) \
2670 \
2671 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2672 , ReturnProbe); \
2673 \
2674 JNI_ENTRY(Return, \
2675 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2676 JNIWrapper("New" XSTR(Result) "Array"); \
2677 EntryProbe; \
2678 Return ret = NULL;\
2679 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2680 \
2681 oop obj= oopFactory::Allocator(len, CHECK_0); \
2682 ret = (Return) JNIHandles::make_local(env, obj); \
2683 return ret;\
2684 JNI_END
2685
2686 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2687 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2690 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2693 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2696 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2699 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2701 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2702 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2703 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2704 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2705 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2706 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2707 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2708 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2709 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2710
2711 // Return an address which will fault if the caller writes to it.
2712
2713 static char* get_bad_address() {
2714 static char* bad_address = NULL;
2715 if (bad_address == NULL) {
2716 size_t size = os::vm_allocation_granularity();
2717 bad_address = os::reserve_memory(size);
2718 if (bad_address != NULL) {
2719 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2720 /*is_committed*/false);
2721 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2722 }
2723 }
2724 return bad_address;
2725 }
2726
2727
2728
2729 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2730 , EntryProbe, ReturnProbe) \
2731 \
2732 JNI_QUICK_ENTRY(ElementType*, \
2733 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2734 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2735 EntryProbe; \
2736 /* allocate an chunk of memory in c land */ \
2737 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2738 ElementType* result; \
2739 int len = a->length(); \
2740 if (len == 0) { \
2741 /* Empty array: legal but useless, can't return NULL. \
2742 * Return a pointer to something useless. \
2743 * Avoid asserts in typeArrayOop. */ \
2744 result = (ElementType*)get_bad_address(); \
2745 } else { \
2746 /* JNI Specification states return NULL on OOM */ \
2747 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2748 if (result != NULL) { \
2749 /* copy the array to the c chunk */ \
2750 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2751 if (isCopy) { \
2752 *isCopy = JNI_TRUE; \
2753 } \
2754 } \
2755 } \
2756 ReturnProbe; \
2757 return result; \
2758 JNI_END
2759
2760 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2761 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2764 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2767 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2769 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2770 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2771 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2772 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2773 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2774 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2775 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2776 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2777 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2778 // Float and double probes don't return value because dtrace doesn't currently support it
2779 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2780 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2781 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2782 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2783 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2784 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2785
2786
2787 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2788 , EntryProbe, ReturnProbe);\
2789 \
2790 JNI_QUICK_ENTRY(void, \
2791 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2792 ElementType *buf, jint mode)) \
2793 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2794 EntryProbe; \
2795 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2796 int len = a->length(); \
2797 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2798 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2799 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2800 } \
2801 if ((mode == 0) || (mode == JNI_ABORT)) { \
2802 FreeHeap(buf); \
2803 } \
2804 } \
2805 ReturnProbe; \
2806 JNI_END
2807
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2809 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2810 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2812 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2813 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2815 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2816 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2818 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2819 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2821 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2822 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2823 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2824 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2825 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2826 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2827 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2828 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2829 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2830 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2831 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2832
2833
2834 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2835 , EntryProbe, ReturnProbe); \
2836 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2837 , ReturnProbe); \
2838 \
2839 JNI_ENTRY(void, \
2840 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2841 jsize len, ElementType *buf)) \
2842 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2843 EntryProbe; \
2844 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2845 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2846 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2847 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2848 } else { \
2849 if (len > 0) { \
2850 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2851 memcpy((u_char*) buf, \
2852 (u_char*) src->Tag##_at_addr(start), \
2853 len << sc); \
2854 } \
2855 } \
2856 JNI_END
2857
2858 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2859 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2860 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2862 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2863 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2865 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2866 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2868 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2869 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2871 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2872 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2873 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2874 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2875 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2876 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2877 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2878 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2879 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2880 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2881 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2882
2883
2884 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2885 , EntryProbe, ReturnProbe); \
2886 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2887 ,ReturnProbe); \
2888 \
2889 JNI_ENTRY(void, \
2890 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2891 jsize len, const ElementType *buf)) \
2892 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2893 EntryProbe; \
2894 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2895 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2896 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2897 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2898 } else { \
2899 if (len > 0) { \
2900 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2901 memcpy((u_char*) dst->Tag##_at_addr(start), \
2902 (u_char*) buf, \
2903 len << sc); \
2904 } \
2905 } \
2906 JNI_END
2907
2908 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2909 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2910 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2912 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2913 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2915 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2916 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2918 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2919 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2921 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2922 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2923 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2924 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2925 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2926 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2927 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2928 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2929 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2930 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2931 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2932
2933
2934 //
2935 // Interception of natives
2936 //
2937
2938 // The RegisterNatives call being attempted tried to register with a method that
2939 // is not native. Ask JVM TI what prefixes have been specified. Then check
2940 // to see if the native method is now wrapped with the prefixes. See the
2941 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2942 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2943 #if INCLUDE_JVMTI
2944 ResourceMark rm(THREAD);
2945 Method* method;
2946 int name_len = name->utf8_length();
2947 char* name_str = name->as_utf8();
2948 int prefix_count;
2949 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2950 for (int i = 0; i < prefix_count; i++) {
2951 char* prefix = prefixes[i];
2952 int prefix_len = (int)strlen(prefix);
2953
2954 // try adding this prefix to the method name and see if it matches another method name
2955 int trial_len = name_len + prefix_len;
2956 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2957 strcpy(trial_name_str, prefix);
2958 strcat(trial_name_str, name_str);
2959 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2960 if (trial_name == NULL) {
2961 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2962 }
2963 method = k->lookup_method(trial_name, signature);
2964 if (method == NULL) {
2965 continue; // signature doesn't match, try the next prefix
2966 }
2967 if (method->is_native()) {
2968 method->set_is_prefixed_native();
2969 return method; // wahoo, we found a prefixed version of the method, return it
2970 }
2971 // found as non-native, so prefix is good, add it, probably just need more prefixes
2972 name_len = trial_len;
2973 name_str = trial_name_str;
2974 }
2975 #endif // INCLUDE_JVMTI
2976 return NULL; // not found
2977 }
2978
2979 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2980 Method* method = k->lookup_method(name, signature);
2981 if (method == NULL) {
2982 ResourceMark rm;
2983 stringStream st;
2984 st.print("Method %s name or signature does not match",
2985 Method::name_and_sig_as_C_string(k, name, signature));
2986 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2987 }
2988 if (!method->is_native()) {
2989 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2990 method = find_prefixed_native(k, name, signature, THREAD);
2991 if (method == NULL) {
2992 ResourceMark rm;
2993 stringStream st;
2994 st.print("Method %s is not declared as native",
2995 Method::name_and_sig_as_C_string(k, name, signature));
2996 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2997 }
2998 }
2999
3000 if (entry != NULL) {
3001 method->set_native_function(entry,
3002 Method::native_bind_event_is_interesting);
3003 } else {
3004 method->clear_native_function();
3005 }
3006 if (PrintJNIResolving) {
3007 ResourceMark rm(THREAD);
3008 tty->print_cr("[Registering JNI native method %s.%s]",
3009 method->method_holder()->external_name(),
3010 method->name()->as_C_string());
3011 }
3012 return true;
3013 }
3014
3015 DT_RETURN_MARK_DECL(RegisterNatives, jint
3016 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3017
3018 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3019 const JNINativeMethod *methods,
3020 jint nMethods))
3021 JNIWrapper("RegisterNatives");
3022 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3023 jint ret = 0;
3024 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3025
3026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3027
3028 for (int index = 0; index < nMethods; index++) {
3029 const char* meth_name = methods[index].name;
3030 const char* meth_sig = methods[index].signature;
3031 int meth_name_len = (int)strlen(meth_name);
3032
3033 // The class should have been loaded (we have an instance of the class
3034 // passed in) so the method and signature should already be in the symbol
3035 // table. If they're not there, the method doesn't exist.
3036 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3037 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3038
3039 if (name == NULL || signature == NULL) {
3040 ResourceMark rm;
3041 stringStream st;
3042 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3043 // Must return negative value on failure
3044 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3045 }
3046
3047 bool res = register_native(k, name, signature,
3048 (address) methods[index].fnPtr, THREAD);
3049 if (!res) {
3050 ret = -1;
3051 break;
3052 }
3053 }
3054 return ret;
3055 JNI_END
3056
3057
3058 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3059 JNIWrapper("UnregisterNatives");
3060 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3061 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3062 //%note jni_2
3063 if (k->is_instance_klass()) {
3064 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3065 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3066 if (m->is_native()) {
3067 m->clear_native_function();
3068 m->set_signature_handler(NULL);
3069 }
3070 }
3071 }
3072 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3073 return 0;
3074 JNI_END
3075
3076 //
3077 // Monitor functions
3078 //
3079
3080 DT_RETURN_MARK_DECL(MonitorEnter, jint
3081 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3082
3083 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3084 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3085 jint ret = JNI_ERR;
3086 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3087
3088 // If the object is null, we can't do anything with it
3089 if (jobj == NULL) {
3090 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3091 }
3092
3093 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3094 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3095 ret = JNI_OK;
3096 return ret;
3097 JNI_END
3098
3099 DT_RETURN_MARK_DECL(MonitorExit, jint
3100 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3101
3102 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3103 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3104 jint ret = JNI_ERR;
3105 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3106
3107 // Don't do anything with a null object
3108 if (jobj == NULL) {
3109 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3110 }
3111
3112 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3113 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3114
3115 ret = JNI_OK;
3116 return ret;
3117 JNI_END
3118
3119 //
3120 // Extensions
3121 //
3122
3123 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3124 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3125
3126 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3127 JNIWrapper("GetStringRegion");
3128 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3129 DT_VOID_RETURN_MARK(GetStringRegion);
3130 oop s = JNIHandles::resolve_non_null(string);
3131 int s_len = java_lang_String::length(s);
3132 if (start < 0 || len < 0 || start + len > s_len) {
3133 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3134 } else {
3135 if (len > 0) {
3136 typeArrayOop s_value = java_lang_String::value(s);
3137 bool is_latin1 = java_lang_String::is_latin1(s);
3138 if (!is_latin1) {
3139 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3140 } else {
3141 for (int i = 0; i < len; i++) {
3142 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3143 }
3144 }
3145 }
3146 }
3147 JNI_END
3148
3149 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3150 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3151
3152 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3153 JNIWrapper("GetStringUTFRegion");
3154 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3155 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3156 oop s = JNIHandles::resolve_non_null(string);
3157 int s_len = java_lang_String::length(s);
3158 if (start < 0 || len < 0 || start + len > s_len) {
3159 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3160 } else {
3161 //%note jni_7
3162 if (len > 0) {
3163 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3164 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3165 // as_utf8_string null-terminates the result string
3166 } else {
3167 // JDK null-terminates the buffer even in len is zero
3168 if (buf != NULL) {
3169 buf[0] = 0;
3170 }
3171 }
3172 }
3173 JNI_END
3174
3175
3176 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3177 JNIWrapper("GetPrimitiveArrayCritical");
3178 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3179 GCLocker::lock_critical(thread);
3180 if (isCopy != NULL) {
3181 *isCopy = JNI_FALSE;
3182 }
3183 oop a = JNIHandles::resolve_non_null(array);
3184 assert(a->is_array(), "just checking");
3185 BasicType type;
3186 if (a->is_objArray()) {
3187 type = T_OBJECT;
3188 } else {
3189 type = TypeArrayKlass::cast(a->klass())->element_type();
3190 }
3191 void* ret = arrayOop(a)->base(type);
3192 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3193 return ret;
3194 JNI_END
3195
3196
3197 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3198 JNIWrapper("ReleasePrimitiveArrayCritical");
3199 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3200 // The array, carray and mode arguments are ignored
3201 GCLocker::unlock_critical(thread);
3202 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3203 JNI_END
3204
3205
3206 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3207 JNIWrapper("GetStringCritical");
3208 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3209 GCLocker::lock_critical(thread);
3210 oop s = JNIHandles::resolve_non_null(string);
3211 typeArrayOop s_value = java_lang_String::value(s);
3212 bool is_latin1 = java_lang_String::is_latin1(s);
3213 if (isCopy != NULL) {
3214 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3215 }
3216 jchar* ret;
3217 if (!is_latin1) {
3218 ret = (jchar*) s_value->base(T_CHAR);
3219 } else {
3220 // Inflate latin1 encoded string to UTF16
3221 int s_len = java_lang_String::length(s);
3222 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3223 /* JNI Specification states return NULL on OOM */
3224 if (ret != NULL) {
3225 for (int i = 0; i < s_len; i++) {
3226 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3227 }
3228 ret[s_len] = 0;
3229 }
3230 }
3231 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3232 return ret;
3233 JNI_END
3234
3235
3236 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3237 JNIWrapper("ReleaseStringCritical");
3238 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3239 // The str and chars arguments are ignored for UTF16 strings
3240 oop s = JNIHandles::resolve_non_null(str);
3241 bool is_latin1 = java_lang_String::is_latin1(s);
3242 if (is_latin1) {
3243 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3244 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3245 FREE_C_HEAP_ARRAY(jchar, chars);
3246 }
3247 GCLocker::unlock_critical(thread);
3248 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3249 JNI_END
3250
3251
3252 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3253 JNIWrapper("jni_NewWeakGlobalRef");
3254 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3255 Handle ref_handle(thread, JNIHandles::resolve(ref));
3256 jweak ret = JNIHandles::make_weak_global(ref_handle);
3257 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3258 return ret;
3259 JNI_END
3260
3261 // Must be JNI_ENTRY (with HandleMark)
3262 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3263 JNIWrapper("jni_DeleteWeakGlobalRef");
3264 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3265 JNIHandles::destroy_weak_global(ref);
3266 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3267 JNI_END
3268
3269
3270 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3271 JNIWrapper("jni_ExceptionCheck");
3272 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3273 jni_check_async_exceptions(thread);
3274 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3275 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3276 return ret;
3277 JNI_END
3278
3279
3280 // Initialization state for three routines below relating to
3281 // java.nio.DirectBuffers
3282 static jint directBufferSupportInitializeStarted = 0;
3283 static volatile jint directBufferSupportInitializeEnded = 0;
3284 static volatile jint directBufferSupportInitializeFailed = 0;
3285 static jclass bufferClass = NULL;
3286 static jclass directBufferClass = NULL;
3287 static jclass directByteBufferClass = NULL;
3288 static jmethodID directByteBufferConstructor = NULL;
3289 static jfieldID directBufferAddressField = NULL;
3290 static jfieldID bufferCapacityField = NULL;
3291
3292 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3293 Handle loader; // null (bootstrap) loader
3294 Handle protection_domain; // null protection domain
3295
3296 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3297 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3298
3299 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3300 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3301 }
3302 return result;
3303 }
3304
3305 // These lookups are done with the NULL (bootstrap) ClassLoader to
3306 // circumvent any security checks that would be done by jni_FindClass.
3307 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3308 {
3309 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3310 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3311 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3312 return true;
3313 }
3314 JNI_END
3315
3316
3317 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3318 if (directBufferSupportInitializeFailed) {
3319 return false;
3320 }
3321
3322 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3323 if (!lookupDirectBufferClasses(env)) {
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327
3328 // Make global references for these
3329 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3330 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3331 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3332
3333 // Get needed field and method IDs
3334 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3335 if (env->ExceptionCheck()) {
3336 env->ExceptionClear();
3337 directBufferSupportInitializeFailed = 1;
3338 return false;
3339 }
3340 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3341 if (env->ExceptionCheck()) {
3342 env->ExceptionClear();
3343 directBufferSupportInitializeFailed = 1;
3344 return false;
3345 }
3346 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3347 if (env->ExceptionCheck()) {
3348 env->ExceptionClear();
3349 directBufferSupportInitializeFailed = 1;
3350 return false;
3351 }
3352
3353 if ((directByteBufferConstructor == NULL) ||
3354 (directBufferAddressField == NULL) ||
3355 (bufferCapacityField == NULL)) {
3356 directBufferSupportInitializeFailed = 1;
3357 return false;
3358 }
3359
3360 directBufferSupportInitializeEnded = 1;
3361 } else {
3362 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3363 os::naked_yield();
3364 }
3365 }
3366
3367 return !directBufferSupportInitializeFailed;
3368 }
3369
3370 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3371 {
3372 // thread_from_jni_environment() will block if VM is gone.
3373 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3374
3375 JNIWrapper("jni_NewDirectByteBuffer");
3376 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3377
3378 if (!directBufferSupportInitializeEnded) {
3379 if (!initializeDirectBufferSupport(env, thread)) {
3380 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3381 return NULL;
3382 }
3383 }
3384
3385 // Being paranoid about accidental sign extension on address
3386 jlong addr = (jlong) ((uintptr_t) address);
3387 // NOTE that package-private DirectByteBuffer constructor currently
3388 // takes int capacity
3389 jint cap = (jint) capacity;
3390 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3391 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3392 return ret;
3393 }
3394
3395 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3396 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3397
3398 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3399 {
3400 // thread_from_jni_environment() will block if VM is gone.
3401 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3402
3403 JNIWrapper("jni_GetDirectBufferAddress");
3404 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3405 void* ret = NULL;
3406 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3407
3408 if (!directBufferSupportInitializeEnded) {
3409 if (!initializeDirectBufferSupport(env, thread)) {
3410 return 0;
3411 }
3412 }
3413
3414 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3415 return 0;
3416 }
3417
3418 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3419 return ret;
3420 }
3421
3422 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3423 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3424
3425 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3426 {
3427 // thread_from_jni_environment() will block if VM is gone.
3428 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3429
3430 JNIWrapper("jni_GetDirectBufferCapacity");
3431 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3432 jlong ret = -1;
3433 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3434
3435 if (!directBufferSupportInitializeEnded) {
3436 if (!initializeDirectBufferSupport(env, thread)) {
3437 ret = 0;
3438 return ret;
3439 }
3440 }
3441
3442 if (buf == NULL) {
3443 return -1;
3444 }
3445
3446 if (!env->IsInstanceOf(buf, directBufferClass)) {
3447 return -1;
3448 }
3449
3450 // NOTE that capacity is currently an int in the implementation
3451 ret = env->GetIntField(buf, bufferCapacityField);
3452 return ret;
3453 }
3454
3455
3456 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3457 JNIWrapper("GetVersion");
3458 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3459 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3460 return CurrentVersion;
3461 JNI_END
3462
3463 extern struct JavaVM_ main_vm;
3464
3465 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3466 JNIWrapper("jni_GetJavaVM");
3467 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3468 *vm = (JavaVM *)(&main_vm);
3469 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3470 return JNI_OK;
3471 JNI_END
3472
3473
3474 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3475 JNIWrapper("GetModule");
3476 return Modules::get_module(clazz, THREAD);
3477 JNI_END
3478
3479
3480 // Structure containing all jni functions
3481 struct JNINativeInterface_ jni_NativeInterface = {
3482 NULL,
3483 NULL,
3484 NULL,
3485
3486 NULL,
3487
3488 jni_GetVersion,
3489
3490 jni_DefineClass,
3491 jni_FindClass,
3492
3493 jni_FromReflectedMethod,
3494 jni_FromReflectedField,
3495
3496 jni_ToReflectedMethod,
3497
3498 jni_GetSuperclass,
3499 jni_IsAssignableFrom,
3500
3501 jni_ToReflectedField,
3502
3503 jni_Throw,
3504 jni_ThrowNew,
3505 jni_ExceptionOccurred,
3506 jni_ExceptionDescribe,
3507 jni_ExceptionClear,
3508 jni_FatalError,
3509
3510 jni_PushLocalFrame,
3511 jni_PopLocalFrame,
3512
3513 jni_NewGlobalRef,
3514 jni_DeleteGlobalRef,
3515 jni_DeleteLocalRef,
3516 jni_IsSameObject,
3517
3518 jni_NewLocalRef,
3519 jni_EnsureLocalCapacity,
3520
3521 jni_AllocObject,
3522 jni_NewObject,
3523 jni_NewObjectV,
3524 jni_NewObjectA,
3525
3526 jni_GetObjectClass,
3527 jni_IsInstanceOf,
3528
3529 jni_GetMethodID,
3530
3531 jni_CallObjectMethod,
3532 jni_CallObjectMethodV,
3533 jni_CallObjectMethodA,
3534 jni_CallBooleanMethod,
3535 jni_CallBooleanMethodV,
3536 jni_CallBooleanMethodA,
3537 jni_CallByteMethod,
3538 jni_CallByteMethodV,
3539 jni_CallByteMethodA,
3540 jni_CallCharMethod,
3541 jni_CallCharMethodV,
3542 jni_CallCharMethodA,
3543 jni_CallShortMethod,
3544 jni_CallShortMethodV,
3545 jni_CallShortMethodA,
3546 jni_CallIntMethod,
3547 jni_CallIntMethodV,
3548 jni_CallIntMethodA,
3549 jni_CallLongMethod,
3550 jni_CallLongMethodV,
3551 jni_CallLongMethodA,
3552 jni_CallFloatMethod,
3553 jni_CallFloatMethodV,
3554 jni_CallFloatMethodA,
3555 jni_CallDoubleMethod,
3556 jni_CallDoubleMethodV,
3557 jni_CallDoubleMethodA,
3558 jni_CallVoidMethod,
3559 jni_CallVoidMethodV,
3560 jni_CallVoidMethodA,
3561
3562 jni_CallNonvirtualObjectMethod,
3563 jni_CallNonvirtualObjectMethodV,
3564 jni_CallNonvirtualObjectMethodA,
3565 jni_CallNonvirtualBooleanMethod,
3566 jni_CallNonvirtualBooleanMethodV,
3567 jni_CallNonvirtualBooleanMethodA,
3568 jni_CallNonvirtualByteMethod,
3569 jni_CallNonvirtualByteMethodV,
3570 jni_CallNonvirtualByteMethodA,
3571 jni_CallNonvirtualCharMethod,
3572 jni_CallNonvirtualCharMethodV,
3573 jni_CallNonvirtualCharMethodA,
3574 jni_CallNonvirtualShortMethod,
3575 jni_CallNonvirtualShortMethodV,
3576 jni_CallNonvirtualShortMethodA,
3577 jni_CallNonvirtualIntMethod,
3578 jni_CallNonvirtualIntMethodV,
3579 jni_CallNonvirtualIntMethodA,
3580 jni_CallNonvirtualLongMethod,
3581 jni_CallNonvirtualLongMethodV,
3582 jni_CallNonvirtualLongMethodA,
3583 jni_CallNonvirtualFloatMethod,
3584 jni_CallNonvirtualFloatMethodV,
3585 jni_CallNonvirtualFloatMethodA,
3586 jni_CallNonvirtualDoubleMethod,
3587 jni_CallNonvirtualDoubleMethodV,
3588 jni_CallNonvirtualDoubleMethodA,
3589 jni_CallNonvirtualVoidMethod,
3590 jni_CallNonvirtualVoidMethodV,
3591 jni_CallNonvirtualVoidMethodA,
3592
3593 jni_GetFieldID,
3594
3595 jni_GetObjectField,
3596 jni_GetBooleanField,
3597 jni_GetByteField,
3598 jni_GetCharField,
3599 jni_GetShortField,
3600 jni_GetIntField,
3601 jni_GetLongField,
3602 jni_GetFloatField,
3603 jni_GetDoubleField,
3604
3605 jni_SetObjectField,
3606 jni_SetBooleanField,
3607 jni_SetByteField,
3608 jni_SetCharField,
3609 jni_SetShortField,
3610 jni_SetIntField,
3611 jni_SetLongField,
3612 jni_SetFloatField,
3613 jni_SetDoubleField,
3614
3615 jni_GetStaticMethodID,
3616
3617 jni_CallStaticObjectMethod,
3618 jni_CallStaticObjectMethodV,
3619 jni_CallStaticObjectMethodA,
3620 jni_CallStaticBooleanMethod,
3621 jni_CallStaticBooleanMethodV,
3622 jni_CallStaticBooleanMethodA,
3623 jni_CallStaticByteMethod,
3624 jni_CallStaticByteMethodV,
3625 jni_CallStaticByteMethodA,
3626 jni_CallStaticCharMethod,
3627 jni_CallStaticCharMethodV,
3628 jni_CallStaticCharMethodA,
3629 jni_CallStaticShortMethod,
3630 jni_CallStaticShortMethodV,
3631 jni_CallStaticShortMethodA,
3632 jni_CallStaticIntMethod,
3633 jni_CallStaticIntMethodV,
3634 jni_CallStaticIntMethodA,
3635 jni_CallStaticLongMethod,
3636 jni_CallStaticLongMethodV,
3637 jni_CallStaticLongMethodA,
3638 jni_CallStaticFloatMethod,
3639 jni_CallStaticFloatMethodV,
3640 jni_CallStaticFloatMethodA,
3641 jni_CallStaticDoubleMethod,
3642 jni_CallStaticDoubleMethodV,
3643 jni_CallStaticDoubleMethodA,
3644 jni_CallStaticVoidMethod,
3645 jni_CallStaticVoidMethodV,
3646 jni_CallStaticVoidMethodA,
3647
3648 jni_GetStaticFieldID,
3649
3650 jni_GetStaticObjectField,
3651 jni_GetStaticBooleanField,
3652 jni_GetStaticByteField,
3653 jni_GetStaticCharField,
3654 jni_GetStaticShortField,
3655 jni_GetStaticIntField,
3656 jni_GetStaticLongField,
3657 jni_GetStaticFloatField,
3658 jni_GetStaticDoubleField,
3659
3660 jni_SetStaticObjectField,
3661 jni_SetStaticBooleanField,
3662 jni_SetStaticByteField,
3663 jni_SetStaticCharField,
3664 jni_SetStaticShortField,
3665 jni_SetStaticIntField,
3666 jni_SetStaticLongField,
3667 jni_SetStaticFloatField,
3668 jni_SetStaticDoubleField,
3669
3670 jni_NewString,
3671 jni_GetStringLength,
3672 jni_GetStringChars,
3673 jni_ReleaseStringChars,
3674
3675 jni_NewStringUTF,
3676 jni_GetStringUTFLength,
3677 jni_GetStringUTFChars,
3678 jni_ReleaseStringUTFChars,
3679
3680 jni_GetArrayLength,
3681
3682 jni_NewObjectArray,
3683 jni_GetObjectArrayElement,
3684 jni_SetObjectArrayElement,
3685
3686 jni_NewBooleanArray,
3687 jni_NewByteArray,
3688 jni_NewCharArray,
3689 jni_NewShortArray,
3690 jni_NewIntArray,
3691 jni_NewLongArray,
3692 jni_NewFloatArray,
3693 jni_NewDoubleArray,
3694
3695 jni_GetBooleanArrayElements,
3696 jni_GetByteArrayElements,
3697 jni_GetCharArrayElements,
3698 jni_GetShortArrayElements,
3699 jni_GetIntArrayElements,
3700 jni_GetLongArrayElements,
3701 jni_GetFloatArrayElements,
3702 jni_GetDoubleArrayElements,
3703
3704 jni_ReleaseBooleanArrayElements,
3705 jni_ReleaseByteArrayElements,
3706 jni_ReleaseCharArrayElements,
3707 jni_ReleaseShortArrayElements,
3708 jni_ReleaseIntArrayElements,
3709 jni_ReleaseLongArrayElements,
3710 jni_ReleaseFloatArrayElements,
3711 jni_ReleaseDoubleArrayElements,
3712
3713 jni_GetBooleanArrayRegion,
3714 jni_GetByteArrayRegion,
3715 jni_GetCharArrayRegion,
3716 jni_GetShortArrayRegion,
3717 jni_GetIntArrayRegion,
3718 jni_GetLongArrayRegion,
3719 jni_GetFloatArrayRegion,
3720 jni_GetDoubleArrayRegion,
3721
3722 jni_SetBooleanArrayRegion,
3723 jni_SetByteArrayRegion,
3724 jni_SetCharArrayRegion,
3725 jni_SetShortArrayRegion,
3726 jni_SetIntArrayRegion,
3727 jni_SetLongArrayRegion,
3728 jni_SetFloatArrayRegion,
3729 jni_SetDoubleArrayRegion,
3730
3731 jni_RegisterNatives,
3732 jni_UnregisterNatives,
3733
3734 jni_MonitorEnter,
3735 jni_MonitorExit,
3736
3737 jni_GetJavaVM,
3738
3739 jni_GetStringRegion,
3740 jni_GetStringUTFRegion,
3741
3742 jni_GetPrimitiveArrayCritical,
3743 jni_ReleasePrimitiveArrayCritical,
3744
3745 jni_GetStringCritical,
3746 jni_ReleaseStringCritical,
3747
3748 jni_NewWeakGlobalRef,
3749 jni_DeleteWeakGlobalRef,
3750
3751 jni_ExceptionCheck,
3752
3753 jni_NewDirectByteBuffer,
3754 jni_GetDirectBufferAddress,
3755 jni_GetDirectBufferCapacity,
3756
3757 // New 1_6 features
3758
3759 jni_GetObjectRefType,
3760
3761 // Module features
3762
3763 jni_GetModule
3764 };
3765
3766
3767 // For jvmti use to modify jni function table.
3768 // Java threads in native contiues to run until it is transitioned
3769 // to VM at safepoint. Before the transition or before it is blocked
3770 // for safepoint it may access jni function table. VM could crash if
3771 // any java thread access the jni function table in the middle of memcpy.
3772 // To avoid this each function pointers are copied automically.
3773 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3774 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3775 intptr_t *a = (intptr_t *) jni_functions();
3776 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3777 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3778 Atomic::store_ptr(*b++, a++);
3779 }
3780 }
3781
3782 void quicken_jni_functions() {
3783 // Replace Get<Primitive>Field with fast versions
3784 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3785 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3786 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3787 // windows x86 currently needs SEH wrapper and the gain of the fast
3788 // versions currently isn't certain for server vm on uniprocessor.
3789 && os::is_MP()
3790 #endif
3791 ) {
3792 address func;
3793 func = JNI_FastGetField::generate_fast_get_boolean_field();
3794 if (func != (address)-1) {
3795 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3796 }
3797 func = JNI_FastGetField::generate_fast_get_byte_field();
3798 if (func != (address)-1) {
3799 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3800 }
3801 func = JNI_FastGetField::generate_fast_get_char_field();
3802 if (func != (address)-1) {
3803 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3804 }
3805 func = JNI_FastGetField::generate_fast_get_short_field();
3806 if (func != (address)-1) {
3807 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3808 }
3809 func = JNI_FastGetField::generate_fast_get_int_field();
3810 if (func != (address)-1) {
3811 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3812 }
3813 func = JNI_FastGetField::generate_fast_get_long_field();
3814 if (func != (address)-1) {
3815 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3816 }
3817 func = JNI_FastGetField::generate_fast_get_float_field();
3818 if (func != (address)-1) {
3819 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3820 }
3821 func = JNI_FastGetField::generate_fast_get_double_field();
3822 if (func != (address)-1) {
3823 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3824 }
3825 }
3826 }
3827
3828 // Returns the function structure
3829 struct JNINativeInterface_* jni_functions() {
3830 #if INCLUDE_JNI_CHECK
3831 if (CheckJNICalls) return jni_functions_check();
3832 #endif // INCLUDE_JNI_CHECK
3833 return &jni_NativeInterface;
3834 }
3835
3836 // Returns the function structure
3837 struct JNINativeInterface_* jni_functions_nocheck() {
3838 return &jni_NativeInterface;
3839 }
3840
3841
3842 // Invocation API
3843
3844
3845 // Forward declaration
3846 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3847
3848 // Global invocation API vars
3849 volatile jint vm_created = 0;
3850 // Indicate whether it is safe to recreate VM
3851 volatile jint safe_to_recreate_vm = 1;
3852 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3853
3854
3855 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3856 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3857
3858 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3859 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3860
3861 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3862 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3863 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3864 jint ret = JNI_ERR;
3865 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3866
3867 if (Threads::is_supported_jni_version(args->version)) {
3868 ret = JNI_OK;
3869 }
3870 // 1.1 style no longer supported in hotspot.
3871 // According the JNI spec, we should update args->version on return.
3872 // We also use the structure to communicate with launcher about default
3873 // stack size.
3874 if (args->version == JNI_VERSION_1_1) {
3875 args->version = JNI_VERSION_1_2;
3876 // javaStackSize is int in arguments structure
3877 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3878 args->javaStackSize = (jint)(ThreadStackSize * K);
3879 }
3880 return ret;
3881 }
3882
3883 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3884 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3885
3886 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3887 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3888
3889 jint result = JNI_ERR;
3890 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3891
3892 // We're about to use Atomic::xchg for synchronization. Some Zero
3893 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3894 // but __sync_lock_test_and_set is not guaranteed to do what we want
3895 // on all architectures. So we check it works before relying on it.
3896 #if defined(ZERO) && defined(ASSERT)
3897 {
3898 jint a = 0xcafebabe;
3899 jint b = Atomic::xchg(0xdeadbeef, &a);
3900 void *c = &a;
3901 void *d = Atomic::xchg_ptr(&b, &c);
3902 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3903 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3904 }
3905 #endif // ZERO && ASSERT
3906
3907 // At the moment it's only possible to have one Java VM,
3908 // since some of the runtime state is in global variables.
3909
3910 // We cannot use our mutex locks here, since they only work on
3911 // Threads. We do an atomic compare and exchange to ensure only
3912 // one thread can call this method at a time
3913
3914 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3915 // the add/dec implementations are dependent on whether we are running
3916 // on a multiprocessor, and at this stage of initialization the os::is_MP
3917 // function used to determine this will always return false. Atomic::xchg
3918 // does not have this problem.
3919 if (Atomic::xchg(1, &vm_created) == 1) {
3920 return JNI_EEXIST; // already created, or create attempt in progress
3921 }
3922 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3923 return JNI_ERR; // someone tried and failed and retry not allowed.
3924 }
3925
3926 assert(vm_created == 1, "vm_created is true during the creation");
3927
3928 /**
3929 * Certain errors during initialization are recoverable and do not
3930 * prevent this method from being called again at a later time
3931 * (perhaps with different arguments). However, at a certain
3932 * point during initialization if an error occurs we cannot allow
3933 * this function to be called again (or it will crash). In those
3934 * situations, the 'canTryAgain' flag is set to false, which atomically
3935 * sets safe_to_recreate_vm to 1, such that any new call to
3936 * JNI_CreateJavaVM will immediately fail using the above logic.
3937 */
3938 bool can_try_again = true;
3939
3940 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3941 if (result == JNI_OK) {
3942 JavaThread *thread = JavaThread::current();
3943 assert(!thread->has_pending_exception(), "should have returned not OK");
3944 /* thread is thread_in_vm here */
3945 *vm = (JavaVM *)(&main_vm);
3946 *(JNIEnv**)penv = thread->jni_environment();
3947
3948 #if INCLUDE_JVMCI
3949 if (EnableJVMCI) {
3950 if (UseJVMCICompiler) {
3951 // JVMCI is initialized on a CompilerThread
3952 if (BootstrapJVMCI) {
3953 JavaThread* THREAD = thread;
3954 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3955 compiler->bootstrap(THREAD);
3956 if (HAS_PENDING_EXCEPTION) {
3957 HandleMark hm;
3958 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3959 }
3960 }
3961 }
3962 }
3963 #endif
3964
3965 // Tracks the time application was running before GC
3966 RuntimeService::record_application_start();
3967
3968 // Notify JVMTI
3969 if (JvmtiExport::should_post_thread_life()) {
3970 JvmtiExport::post_thread_start(thread);
3971 }
3972
3973 EventThreadStart event;
3974 if (event.should_commit()) {
3975 event.set_thread(THREAD_TRACE_ID(thread));
3976 event.commit();
3977 }
3978
3979 #ifndef PRODUCT
3980 // Check if we should compile all classes on bootclasspath
3981 if (CompileTheWorld) ClassLoader::compile_the_world();
3982 if (ReplayCompiles) ciReplay::replay(thread);
3983
3984 // Some platforms (like Win*) need a wrapper around these test
3985 // functions in order to properly handle error conditions.
3986 VMError::test_error_handler();
3987 if (ExecuteInternalVMTests) {
3988 InternalVMTests::run();
3989 }
3990 #endif
3991
3992 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3993 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3994 } else {
3995 // If create_vm exits because of a pending exception, exit with that
3996 // exception. In the future when we figure out how to reclaim memory,
3997 // we may be able to exit with JNI_ERR and allow the calling application
3998 // to continue.
3999 if (Universe::is_fully_initialized()) {
4000 // otherwise no pending exception possible - VM will already have aborted
4001 JavaThread* THREAD = JavaThread::current();
4002 if (HAS_PENDING_EXCEPTION) {
4003 HandleMark hm;
4004 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4005 }
4006 }
4007
4008 if (can_try_again) {
4009 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4010 safe_to_recreate_vm = 1;
4011 }
4012
4013 // Creation failed. We must reset vm_created
4014 *vm = 0;
4015 *(JNIEnv**)penv = 0;
4016 // reset vm_created last to avoid race condition. Use OrderAccess to
4017 // control both compiler and architectural-based reordering.
4018 OrderAccess::release_store(&vm_created, 0);
4019 }
4020
4021 // Flush stdout and stderr before exit.
4022 fflush(stdout);
4023 fflush(stderr);
4024
4025 return result;
4026
4027 }
4028
4029 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4030 jint result = JNI_ERR;
4031 // On Windows, let CreateJavaVM run with SEH protection
4032 #ifdef _WIN32
4033 __try {
4034 #endif
4035 result = JNI_CreateJavaVM_inner(vm, penv, args);
4036 #ifdef _WIN32
4037 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4038 // Nothing to do.
4039 }
4040 #endif
4041 return result;
4042 }
4043
4044 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4045 // See bug 4367188, the wrapper can sometimes cause VM crashes
4046 // JNIWrapper("GetCreatedJavaVMs");
4047
4048 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4049
4050 if (vm_created) {
4051 if (numVMs != NULL) *numVMs = 1;
4052 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4053 } else {
4054 if (numVMs != NULL) *numVMs = 0;
4055 }
4056 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4057 return JNI_OK;
4058 }
4059
4060 extern "C" {
4061
4062 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4063 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4064
4065 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4066 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4067 jint res = JNI_ERR;
4068 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4069
4070 if (!vm_created) {
4071 res = JNI_ERR;
4072 return res;
4073 }
4074
4075 JNIWrapper("DestroyJavaVM");
4076 JNIEnv *env;
4077 JavaVMAttachArgs destroyargs;
4078 destroyargs.version = CurrentVersion;
4079 destroyargs.name = (char *)"DestroyJavaVM";
4080 destroyargs.group = NULL;
4081 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4082 if (res != JNI_OK) {
4083 return res;
4084 }
4085
4086 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4087 JavaThread* thread = JavaThread::current();
4088 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4089 if (Threads::destroy_vm()) {
4090 // Should not change thread state, VM is gone
4091 vm_created = false;
4092 res = JNI_OK;
4093 return res;
4094 } else {
4095 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4096 res = JNI_ERR;
4097 return res;
4098 }
4099 }
4100
4101 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4102 jint result = JNI_ERR;
4103 // On Windows, we need SEH protection
4104 #ifdef _WIN32
4105 __try {
4106 #endif
4107 result = jni_DestroyJavaVM_inner(vm);
4108 #ifdef _WIN32
4109 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4110 // Nothing to do.
4111 }
4112 #endif
4113 return result;
4114 }
4115
4116 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4117 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4118
4119 // Check below commented out from JDK1.2fcs as well
4120 /*
4121 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4122 return JNI_EVERSION;
4123 }
4124 */
4125
4126 Thread* t = Thread::current_or_null();
4127 if (t != NULL) {
4128 // If the thread has been attached this operation is a no-op
4129 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4130 return JNI_OK;
4131 }
4132
4133 // Create a thread and mark it as attaching so it will be skipped by the
4134 // ThreadsListEnumerator - see CR 6404306
4135 JavaThread* thread = new JavaThread(true);
4136
4137 // Set correct safepoint info. The thread is going to call into Java when
4138 // initializing the Java level thread object. Hence, the correct state must
4139 // be set in order for the Safepoint code to deal with it correctly.
4140 thread->set_thread_state(_thread_in_vm);
4141 thread->record_stack_base_and_size();
4142 thread->initialize_thread_current();
4143
4144 if (!os::create_attached_thread(thread)) {
4145 delete thread;
4146 return JNI_ERR;
4147 }
4148 // Enable stack overflow checks
4149 thread->create_stack_guard_pages();
4150
4151 thread->initialize_tlab();
4152
4153 thread->cache_global_variables();
4154
4155 // Crucial that we do not have a safepoint check for this thread, since it has
4156 // not been added to the Thread list yet.
4157 { Threads_lock->lock_without_safepoint_check();
4158 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4159 // avoid this thread trying to do a GC before it is added to the thread-list
4160 thread->set_active_handles(JNIHandleBlock::allocate_block());
4161 Threads::add(thread, daemon);
4162 Threads_lock->unlock();
4163 }
4164 // Create thread group and name info from attach arguments
4165 oop group = NULL;
4166 char* thread_name = NULL;
4167 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4168 group = JNIHandles::resolve(args->group);
4169 thread_name = args->name; // may be NULL
4170 }
4171 if (group == NULL) group = Universe::main_thread_group();
4172
4173 // Create Java level thread object and attach it to this thread
4174 bool attach_failed = false;
4175 {
4176 EXCEPTION_MARK;
4177 HandleMark hm(THREAD);
4178 Handle thread_group(THREAD, group);
4179 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4180 if (HAS_PENDING_EXCEPTION) {
4181 CLEAR_PENDING_EXCEPTION;
4182 // cleanup outside the handle mark.
4183 attach_failed = true;
4184 }
4185 }
4186
4187 if (attach_failed) {
4188 // Added missing cleanup
4189 thread->cleanup_failed_attach_current_thread();
4190 return JNI_ERR;
4191 }
4192
4193 // mark the thread as no longer attaching
4194 // this uses a fence to push the change through so we don't have
4195 // to regrab the threads_lock
4196 thread->set_done_attaching_via_jni();
4197
4198 // Set java thread status.
4199 java_lang_Thread::set_thread_status(thread->threadObj(),
4200 java_lang_Thread::RUNNABLE);
4201
4202 // Notify the debugger
4203 if (JvmtiExport::should_post_thread_life()) {
4204 JvmtiExport::post_thread_start(thread);
4205 }
4206
4207 EventThreadStart event;
4208 if (event.should_commit()) {
4209 event.set_thread(THREAD_TRACE_ID(thread));
4210 event.commit();
4211 }
4212
4213 *(JNIEnv**)penv = thread->jni_environment();
4214
4215 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4216 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4217 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4218 // needed.
4219
4220 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4221
4222 // Perform any platform dependent FPU setup
4223 os::setup_fpu();
4224
4225 return JNI_OK;
4226 }
4227
4228
4229 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4230 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4231 if (!vm_created) {
4232 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4233 return JNI_ERR;
4234 }
4235
4236 JNIWrapper("AttachCurrentThread");
4237 jint ret = attach_current_thread(vm, penv, _args, false);
4238 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4239 return ret;
4240 }
4241
4242
4243 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4244 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4245 VM_Exit::block_if_vm_exited();
4246
4247 JNIWrapper("DetachCurrentThread");
4248
4249 // If the thread has already been detached the operation is a no-op
4250 if (Thread::current_or_null() == NULL) {
4251 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4252 return JNI_OK;
4253 }
4254
4255 JavaThread* thread = JavaThread::current();
4256 if (thread->has_last_Java_frame()) {
4257 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4258 // Can't detach a thread that's running java, that can't work.
4259 return JNI_ERR;
4260 }
4261
4262 // Safepoint support. Have to do call-back to safepoint code, if in the
4263 // middel of a safepoint operation
4264 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4265
4266 // XXX: Note that JavaThread::exit() call below removes the guards on the
4267 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4268 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4269 // of the guards is visible in jni_AttachCurrentThread above,
4270 // the removal of the guards is buried below in JavaThread::exit()
4271 // here. The abstraction should be more symmetrically either exposed
4272 // or hidden (e.g. it could probably be hidden in the same
4273 // (platform-dependent) methods where we do alternate stack
4274 // maintenance work?)
4275 thread->exit(false, JavaThread::jni_detach);
4276 delete thread;
4277
4278 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4279 return JNI_OK;
4280 }
4281
4282 DT_RETURN_MARK_DECL(GetEnv, jint
4283 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4284
4285 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4286 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4287 jint ret = JNI_ERR;
4288 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4289
4290 if (!vm_created) {
4291 *penv = NULL;
4292 ret = JNI_EDETACHED;
4293 return ret;
4294 }
4295
4296 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4297 return ret;
4298 }
4299
4300 #ifndef JVMPI_VERSION_1
4301 // need these in order to be polite about older agents
4302 #define JVMPI_VERSION_1 ((jint)0x10000001)
4303 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4304 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4305 #endif // !JVMPI_VERSION_1
4306
4307 Thread* thread = Thread::current_or_null();
4308 if (thread != NULL && thread->is_Java_thread()) {
4309 if (Threads::is_supported_jni_version_including_1_1(version)) {
4310 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4311 ret = JNI_OK;
4312 return ret;
4313
4314 } else if (version == JVMPI_VERSION_1 ||
4315 version == JVMPI_VERSION_1_1 ||
4316 version == JVMPI_VERSION_1_2) {
4317 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4318 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4319 ret = JNI_EVERSION;
4320 return ret;
4321 } else if (JvmtiExport::is_jvmdi_version(version)) {
4322 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4323 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4324 ret = JNI_EVERSION;
4325 return ret;
4326 } else {
4327 *penv = NULL;
4328 ret = JNI_EVERSION;
4329 return ret;
4330 }
4331 } else {
4332 *penv = NULL;
4333 ret = JNI_EDETACHED;
4334 return ret;
4335 }
4336 }
4337
4338
4339 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4340 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4341 if (!vm_created) {
4342 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4343 return JNI_ERR;
4344 }
4345
4346 JNIWrapper("AttachCurrentThreadAsDaemon");
4347 jint ret = attach_current_thread(vm, penv, _args, true);
4348 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4349 return ret;
4350 }
4351
4352
4353 } // End extern "C"
4354
4355 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4356 NULL,
4357 NULL,
4358 NULL,
4359
4360 jni_DestroyJavaVM,
4361 jni_AttachCurrentThread,
4362 jni_DetachCurrentThread,
4363 jni_GetEnv,
4364 jni_AttachCurrentThreadAsDaemon
4365 };