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