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