1 /*
2 * Copyright (c) 1997, 2018, 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 "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "memory/allocation.hpp"
41 #include "memory/allocation.inline.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/access.inline.hpp"
46 #include "oops/arrayOop.inline.hpp"
47 #include "oops/instanceKlass.hpp"
48 #include "oops/instanceOop.hpp"
49 #include "oops/markOop.hpp"
50 #include "oops/method.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "oops/typeArrayKlass.hpp"
56 #include "oops/typeArrayOop.inline.hpp"
57 #include "prims/jniCheck.hpp"
58 #include "prims/jniExport.hpp"
59 #include "prims/jniFastGetField.hpp"
60 #include "prims/jvm_misc.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/jvmtiThreadState.hpp"
63 #include "runtime/atomic.hpp"
64 #include "runtime/compilationPolicy.hpp"
65 #include "runtime/fieldDescriptor.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.inline.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/jniHandles.inline.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 #include "utilities/vmError.hpp"
89 #if INCLUDE_JVMCI
90 #include "jvmci/jvmciCompiler.hpp"
91 #include "jvmci/jvmciRuntime.hpp"
92 #endif
93
94 static jint CurrentVersion = JNI_VERSION_10;
95
96 #ifdef _WIN32
97 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
98 #endif
99
100 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
101 // '-return' probe regardless of the return path is taken out of the function.
102 // Methods that have multiple return paths use this to avoid having to
103 // instrument each return path. Methods that use CHECK or THROW must use this
104 // since those macros can cause an immedate uninstrumented return.
105 //
106 // In order to get the return value, a reference to the variable containing
107 // the return value must be passed to the contructor of the object, and
108 // the return value must be set before return (since the mark object has
109 // a reference to it).
110 //
111 // Example:
112 // DT_RETURN_MARK_DECL(SomeFunc, int);
113 // JNI_ENTRY(int, SomeFunc, ...)
114 // int return_value = 0;
115 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
116 // foo(CHECK_0)
117 // return_value = 5;
118 // return return_value;
119 // JNI_END
120 #define DT_RETURN_MARK_DECL(name, type, probe) \
121 DTRACE_ONLY( \
122 class DTraceReturnProbeMark_##name { \
123 public: \
124 const type& _ret_ref; \
125 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
126 ~DTraceReturnProbeMark_##name() { \
127 probe; \
128 } \
129 } \
130 )
131 // Void functions are simpler since there's no return value
132 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
133 DTRACE_ONLY( \
134 class DTraceReturnProbeMark_##name { \
135 public: \
136 ~DTraceReturnProbeMark_##name() { \
137 probe; \
138 } \
139 } \
140 )
141
142 // Place these macros in the function to mark the return. Non-void
143 // functions need the type and address of the return value.
144 #define DT_RETURN_MARK(name, type, ref) \
145 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
146 #define DT_VOID_RETURN_MARK(name) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
148
149
150 // Use these to select distinct code for floating-point vs. non-floating point
151 // situations. Used from within common macros where we need slightly
152 // different behavior for Float/Double
153 #define FP_SELECT_Boolean(intcode, fpcode) intcode
154 #define FP_SELECT_Byte(intcode, fpcode) intcode
155 #define FP_SELECT_Char(intcode, fpcode) intcode
156 #define FP_SELECT_Short(intcode, fpcode) intcode
157 #define FP_SELECT_Object(intcode, fpcode) intcode
158 #define FP_SELECT_Int(intcode, fpcode) intcode
159 #define FP_SELECT_Long(intcode, fpcode) intcode
160 #define FP_SELECT_Float(intcode, fpcode) fpcode
161 #define FP_SELECT_Double(intcode, fpcode) fpcode
162 #define FP_SELECT(TypeName, intcode, fpcode) \
163 FP_SELECT_##TypeName(intcode, fpcode)
164
165 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
166 // (dtrace doesn't do FP yet)
167 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
170 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
173
174
175 // out-of-line helpers for class jfieldIDWorkaround:
176
177 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
178 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
179 uintptr_t as_uint = (uintptr_t) id;
180 intptr_t offset = raw_instance_offset(id);
181 if (is_checked_jfieldID(id)) {
182 if (!klass_hash_ok(k, id)) {
183 return false;
184 }
185 }
186 return InstanceKlass::cast(k)->contains_field_offset(offset);
187 } else {
188 JNIid* result = (JNIid*) id;
189 #ifdef ASSERT
190 return result != NULL && result->is_static_field_id();
191 #else
192 return result != NULL;
193 #endif
194 }
195 }
196
197
198 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
199 if (offset <= small_offset_mask) {
200 Klass* field_klass = k;
201 Klass* super_klass = field_klass->super();
202 // With compressed oops the most super class with nonstatic fields would
203 // be the owner of fields embedded in the header.
204 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
205 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
206 field_klass = super_klass; // super contains the field also
207 super_klass = field_klass->super();
208 }
209 debug_only(NoSafepointVerifier nosafepoint;)
210 uintptr_t klass_hash = field_klass->identity_hash();
211 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
212 } else {
213 #if 0
214 #ifndef PRODUCT
215 {
216 ResourceMark rm;
217 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
218 }
219 #endif
220 #endif
221 return 0;
222 }
223 }
224
225 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
226 uintptr_t as_uint = (uintptr_t) id;
227 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
228 do {
229 debug_only(NoSafepointVerifier nosafepoint;)
230 // Could use a non-blocking query for identity_hash here...
231 if ((k->identity_hash() & klass_mask) == klass_hash)
232 return true;
233 k = k->super();
234 } while (k != NULL);
235 return false;
236 }
237
238 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
239 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
240 uintptr_t as_uint = (uintptr_t) id;
241 intptr_t offset = raw_instance_offset(id);
242 if (VerifyJNIFields) {
243 if (is_checked_jfieldID(id)) {
244 guarantee(klass_hash_ok(k, id),
245 "Bug in native code: jfieldID class must match object");
246 } else {
247 #if 0
248 #ifndef PRODUCT
249 if (Verbose) {
250 ResourceMark rm;
251 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
252 }
253 #endif
254 #endif
255 }
256 }
257 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
258 "Bug in native code: jfieldID offset must address interior of object");
259 }
260
261 // Wrapper to trace JNI functions
262
263 #ifdef ASSERT
264 Histogram* JNIHistogram;
265 static volatile int JNIHistogram_lock = 0;
266
267 class JNIHistogramElement : public HistogramElement {
268 public:
269 JNIHistogramElement(const char* name);
270 };
271
272 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
273 _name = elementName;
274 uintx count = 0;
275
276 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
277 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
278 count +=1;
279 if ( (WarnOnStalledSpinLock > 0)
280 && (count % WarnOnStalledSpinLock == 0)) {
281 warning("JNIHistogram_lock seems to be stalled");
282 }
283 }
284 }
285
286
287 if(JNIHistogram == NULL)
288 JNIHistogram = new Histogram("JNI Call Counts",100);
289
290 JNIHistogram->add_element(this);
291 Atomic::dec(&JNIHistogram_lock);
292 }
293
294 #define JNICountWrapper(arg) \
295 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
296 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
297 if (e != NULL) e->increment_count()
298 #define JNIWrapper(arg) JNICountWrapper(arg);
299 #else
300 #define JNIWrapper(arg)
301 #endif
302
303
304 // Implementation of JNI entries
305
306 DT_RETURN_MARK_DECL(DefineClass, jclass
307 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
308
309 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
310 const jbyte *buf, jsize bufLen))
311 JNIWrapper("DefineClass");
312
313 HOTSPOT_JNI_DEFINECLASS_ENTRY(
314 env, (char*) name, loaderRef, (char*) buf, bufLen);
315
316 jclass cls = NULL;
317 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
318
319 TempNewSymbol class_name = NULL;
320 // Since exceptions can be thrown, class initialization can take place
321 // if name is NULL no check for class name in .class stream has to be made.
322 if (name != NULL) {
323 const int str_len = (int)strlen(name);
324 if (str_len > Symbol::max_length()) {
325 // It's impossible to create this class; the name cannot fit
326 // into the constant pool.
327 Exceptions::fthrow(THREAD_AND_LOCATION,
328 vmSymbols::java_lang_NoClassDefFoundError(),
329 "Class name exceeds maximum length of %d: %s",
330 Symbol::max_length(),
331 name);
332 return 0;
333 }
334 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
335 }
336 ResourceMark rm(THREAD);
337 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
338 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
339
340 if (UsePerfData && !class_loader.is_null()) {
341 // check whether the current caller thread holds the lock or not.
342 // If not, increment the corresponding counter
343 if (ObjectSynchronizer::
344 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
345 ObjectSynchronizer::owner_self) {
346 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
347 }
348 }
349 Klass* k = SystemDictionary::resolve_from_stream(class_name,
350 class_loader,
351 Handle(),
352 &st,
353 CHECK_NULL);
354
355 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
356 trace_class_resolution(k);
357 }
358
359 cls = (jclass)JNIHandles::make_local(
360 env, k->java_mirror());
361 return cls;
362 JNI_END
363
364
365
366 static bool first_time_FindClass = true;
367
368 DT_RETURN_MARK_DECL(FindClass, jclass
369 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
370
371 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
372 JNIWrapper("FindClass");
373
374 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
375
376 jclass result = NULL;
377 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
378
379 // Remember if we are the first invocation of jni_FindClass
380 bool first_time = first_time_FindClass;
381 first_time_FindClass = false;
382
383 // Sanity check the name: it cannot be null or larger than the maximum size
384 // name we can fit in the constant pool.
385 if (name == NULL) {
386 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
387 }
388 if ((int)strlen(name) > Symbol::max_length()) {
389 Exceptions::fthrow(THREAD_AND_LOCATION,
390 vmSymbols::java_lang_NoClassDefFoundError(),
391 "Class name exceeds maximum length of %d: %s",
392 Symbol::max_length(),
393 name);
394 return 0;
395 }
396
397 //%note jni_3
398 Handle protection_domain;
399 // Find calling class
400 Klass* k = thread->security_get_caller_class(0);
401 // default to the system loader when no context
402 Handle loader(THREAD, SystemDictionary::java_system_loader());
403 if (k != NULL) {
404 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
405 // in the correct class context.
406 if (k->class_loader() == NULL &&
407 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
408 JavaValue result(T_OBJECT);
409 JavaCalls::call_static(&result, k,
410 vmSymbols::getFromClass_name(),
411 vmSymbols::void_class_signature(),
412 CHECK_NULL);
413 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
414 // a non-NULL Class object. When invoked from JNI_OnUnload,
415 // it will return NULL to indicate no context.
416 oop mirror = (oop) result.get_jobject();
417 if (mirror != NULL) {
418 Klass* fromClass = java_lang_Class::as_Klass(mirror);
419 loader = Handle(THREAD, fromClass->class_loader());
420 protection_domain = Handle(THREAD, fromClass->protection_domain());
421 }
422 } else {
423 loader = Handle(THREAD, k->class_loader());
424 }
425 }
426
427 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
428 result = find_class_from_class_loader(env, sym, true, loader,
429 protection_domain, true, thread);
430
431 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
432 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
433 }
434
435 // If we were the first invocation of jni_FindClass, we enable compilation again
436 // rather than just allowing invocation counter to overflow and decay.
437 // Controlled by flag DelayCompilationDuringStartup.
438 if (first_time && !CompileTheWorld)
439 CompilationPolicy::completed_vm_startup();
440
441 return result;
442 JNI_END
443
444 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
445 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
446
447 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
448 JNIWrapper("FromReflectedMethod");
449
450 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
451
452 jmethodID ret = NULL;
453 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
454
455 // method is a handle to a java.lang.reflect.Method object
456 oop reflected = JNIHandles::resolve_non_null(method);
457 oop mirror = NULL;
458 int slot = 0;
459
460 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
461 mirror = java_lang_reflect_Constructor::clazz(reflected);
462 slot = java_lang_reflect_Constructor::slot(reflected);
463 } else {
464 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
465 mirror = java_lang_reflect_Method::clazz(reflected);
466 slot = java_lang_reflect_Method::slot(reflected);
467 }
468 Klass* k1 = java_lang_Class::as_Klass(mirror);
469
470 // Make sure class is initialized before handing id's out to methods
471 k1->initialize(CHECK_NULL);
472 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
473 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
474 return ret;
475 JNI_END
476
477 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
478 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
479
480 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
481 JNIWrapper("FromReflectedField");
482
483 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
484
485 jfieldID ret = NULL;
486 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
487
488 // field is a handle to a java.lang.reflect.Field object
489 oop reflected = JNIHandles::resolve_non_null(field);
490 oop mirror = java_lang_reflect_Field::clazz(reflected);
491 Klass* k1 = java_lang_Class::as_Klass(mirror);
492 int slot = java_lang_reflect_Field::slot(reflected);
493 int modifiers = java_lang_reflect_Field::modifiers(reflected);
494
495 // Make sure class is initialized before handing id's out to fields
496 k1->initialize(CHECK_NULL);
497
498 // First check if this is a static field
499 if (modifiers & JVM_ACC_STATIC) {
500 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
501 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
502 assert(id != NULL, "corrupt Field object");
503 debug_only(id->set_is_static_field_id();)
504 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
505 ret = jfieldIDWorkaround::to_static_jfieldID(id);
506 return ret;
507 }
508
509 // The slot is the index of the field description in the field-array
510 // The jfieldID is the offset of the field within the object
511 // It may also have hash bits for k, if VerifyJNIFields is turned on.
512 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
513 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
514 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
515 return ret;
516 JNI_END
517
518
519 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
520 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
521
522 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
523 JNIWrapper("ToReflectedMethod");
524
525 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
526
527 jobject ret = NULL;
528 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
529
530 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
531 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
532 oop reflection_method;
533 if (m->is_initializer()) {
534 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
535 } else {
536 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
537 }
538 ret = JNIHandles::make_local(env, reflection_method);
539 return ret;
540 JNI_END
541
542 DT_RETURN_MARK_DECL(GetSuperclass, jclass
543 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
544
545 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
546 JNIWrapper("GetSuperclass");
547
548 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
549
550 jclass obj = NULL;
551 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
552
553 oop mirror = JNIHandles::resolve_non_null(sub);
554 // primitive classes return NULL
555 if (java_lang_Class::is_primitive(mirror)) return NULL;
556
557 // Rules of Class.getSuperClass as implemented by KLass::java_super:
558 // arrays return Object
559 // interfaces return NULL
560 // proper classes return Klass::super()
561 Klass* k = java_lang_Class::as_Klass(mirror);
562 if (k->is_interface()) return NULL;
563
564 // return mirror for superclass
565 Klass* super = k->java_super();
566 // super2 is the value computed by the compiler's getSuperClass intrinsic:
567 debug_only(Klass* super2 = ( k->is_array_klass()
568 ? SystemDictionary::Object_klass()
569 : k->super() ) );
570 assert(super == super2,
571 "java_super computation depends on interface, array, other super");
572 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
573 return obj;
574 JNI_END
575
576 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
577 JNIWrapper("IsSubclassOf");
578
579 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
580
581 oop sub_mirror = JNIHandles::resolve_non_null(sub);
582 oop super_mirror = JNIHandles::resolve_non_null(super);
583 if (java_lang_Class::is_primitive(sub_mirror) ||
584 java_lang_Class::is_primitive(super_mirror)) {
585 jboolean ret = (sub_mirror == super_mirror);
586
587 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
588 return ret;
589 }
590 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
591 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
592 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
593 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
594 JNI_TRUE : JNI_FALSE;
595
596 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
597 return ret;
598 JNI_END
599
600
601 DT_RETURN_MARK_DECL(Throw, jint
602 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
603
604 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
605 JNIWrapper("Throw");
606
607 HOTSPOT_JNI_THROW_ENTRY(env, obj);
608
609 jint ret = JNI_OK;
610 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
611
612 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
613 ShouldNotReachHere();
614 return 0; // Mute compiler.
615 JNI_END
616
617
618 DT_RETURN_MARK_DECL(ThrowNew, jint
619 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
620
621 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
622 JNIWrapper("ThrowNew");
623
624 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
625
626 jint ret = JNI_OK;
627 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
628
629 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
630 Symbol* name = k->name();
631 Handle class_loader (THREAD, k->class_loader());
632 Handle protection_domain (THREAD, k->protection_domain());
633 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
634 ShouldNotReachHere();
635 return 0; // Mute compiler.
636 JNI_END
637
638
639 // JNI functions only transform a pending async exception to a synchronous
640 // exception in ExceptionOccurred and ExceptionCheck calls, since
641 // delivering an async exception in other places won't change the native
642 // code's control flow and would be harmful when native code further calls
643 // JNI functions with a pending exception. Async exception is also checked
644 // during the call, so ExceptionOccurred/ExceptionCheck won't return
645 // false but deliver the async exception at the very end during
646 // state transition.
647
648 static void jni_check_async_exceptions(JavaThread *thread) {
649 assert(thread == Thread::current(), "must be itself");
650 thread->check_and_handle_async_exceptions();
651 }
652
653 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
654 JNIWrapper("ExceptionOccurred");
655
656 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
657
658 jni_check_async_exceptions(thread);
659 oop exception = thread->pending_exception();
660 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
661
662 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
663 return ret;
664 JNI_END
665
666
667 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
668 JNIWrapper("ExceptionDescribe");
669
670 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
671
672 if (thread->has_pending_exception()) {
673 Handle ex(thread, thread->pending_exception());
674 thread->clear_pending_exception();
675 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
676 // Don't print anything if we are being killed.
677 } else {
678 jio_fprintf(defaultStream::error_stream(), "Exception ");
679 if (thread != NULL && thread->threadObj() != NULL) {
680 ResourceMark rm(THREAD);
681 jio_fprintf(defaultStream::error_stream(),
682 "in thread \"%s\" ", thread->get_thread_name());
683 }
684 if (ex->is_a(SystemDictionary::Throwable_klass())) {
685 JavaValue result(T_VOID);
686 JavaCalls::call_virtual(&result,
687 ex,
688 SystemDictionary::Throwable_klass(),
689 vmSymbols::printStackTrace_name(),
690 vmSymbols::void_method_signature(),
691 THREAD);
692 // If an exception is thrown in the call it gets thrown away. Not much
693 // we can do with it. The native code that calls this, does not check
694 // for the exception - hence, it might still be in the thread when DestroyVM gets
695 // called, potentially causing a few asserts to trigger - since no pending exception
696 // is expected.
697 CLEAR_PENDING_EXCEPTION;
698 } else {
699 ResourceMark rm(THREAD);
700 jio_fprintf(defaultStream::error_stream(),
701 ". Uncaught exception of type %s.",
702 ex->klass()->external_name());
703 }
704 }
705 }
706
707 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
708 JNI_END
709
710
711 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
712 JNIWrapper("ExceptionClear");
713
714 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
715
716 // The jni code might be using this API to clear java thrown exception.
717 // So just mark jvmti thread exception state as exception caught.
718 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
719 if (state != NULL && state->is_exception_detected()) {
720 state->set_exception_caught();
721 }
722 thread->clear_pending_exception();
723
724 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
725 JNI_END
726
727
728 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
729 JNIWrapper("FatalError");
730
731 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
732
733 tty->print_cr("FATAL ERROR in native method: %s", msg);
734 thread->print_stack();
735 os::abort(); // Dump core and abort
736 JNI_END
737
738
739 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
740 JNIWrapper("PushLocalFrame");
741
742 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
743
744 //%note jni_11
745 if (capacity < 0 ||
746 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
747 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
748 return JNI_ERR;
749 }
750 JNIHandleBlock* old_handles = thread->active_handles();
751 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
752 assert(new_handles != NULL, "should not be NULL");
753 new_handles->set_pop_frame_link(old_handles);
754 thread->set_active_handles(new_handles);
755 jint ret = JNI_OK;
756 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
757 return ret;
758 JNI_END
759
760
761 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
762 JNIWrapper("PopLocalFrame");
763
764 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
765
766 //%note jni_11
767 Handle result_handle(thread, JNIHandles::resolve(result));
768 JNIHandleBlock* old_handles = thread->active_handles();
769 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
770 if (new_handles != NULL) {
771 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
772 // This way code will still work if PopLocalFrame is called without a corresponding
773 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
774 // the release_block call will release the blocks.
775 thread->set_active_handles(new_handles);
776 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
777 JNIHandleBlock::release_block(old_handles, thread); // may block
778 result = JNIHandles::make_local(thread, result_handle());
779 }
780 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
781 return result;
782 JNI_END
783
784
785 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
786 JNIWrapper("NewGlobalRef");
787
788 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
789
790 Handle ref_handle(thread, JNIHandles::resolve(ref));
791 jobject ret = JNIHandles::make_global(ref_handle);
792
793 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
794 return ret;
795 JNI_END
796
797 // Must be JNI_ENTRY (with HandleMark)
798 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
799 JNIWrapper("DeleteGlobalRef");
800
801 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
802
803 JNIHandles::destroy_global(ref);
804
805 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
806 JNI_END
807
808 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
809 JNIWrapper("DeleteLocalRef");
810
811 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
812
813 JNIHandles::destroy_local(obj);
814
815 HOTSPOT_JNI_DELETELOCALREF_RETURN();
816 JNI_END
817
818 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
819 JNIWrapper("IsSameObject");
820
821 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
822
823 oop a = JNIHandles::resolve(r1);
824 oop b = JNIHandles::resolve(r2);
825 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
826
827 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
828 return ret;
829 JNI_END
830
831
832 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
833 JNIWrapper("NewLocalRef");
834
835 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
836
837 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
838
839 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
840 return ret;
841 JNI_END
842
843 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
844 JNIWrapper("EnsureLocalCapacity");
845
846 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
847
848 jint ret;
849 if (capacity >= 0 &&
850 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
851 ret = JNI_OK;
852 } else {
853 ret = JNI_ERR;
854 }
855
856 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
857 return ret;
858 JNI_END
859
860 // Return the Handle Type
861 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
862 JNIWrapper("GetObjectRefType");
863
864 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
865
866 jobjectRefType ret = JNIInvalidRefType;
867 if (obj != NULL) {
868 ret = JNIHandles::handle_type(thread, obj);
869 }
870
871 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
872 return ret;
873 JNI_END
874
875
876 class JNI_ArgumentPusher : public SignatureIterator {
877 protected:
878 JavaCallArguments* _arguments;
879
880 virtual void get_bool () = 0;
881 virtual void get_char () = 0;
882 virtual void get_short () = 0;
883 virtual void get_byte () = 0;
884 virtual void get_int () = 0;
885 virtual void get_long () = 0;
886 virtual void get_float () = 0;
887 virtual void get_double () = 0;
888 virtual void get_object () = 0;
889
890 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
891 this->_return_type = T_ILLEGAL;
892 _arguments = NULL;
893 }
894
895 public:
896 virtual void iterate( uint64_t fingerprint ) = 0;
897
898 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
899
900 inline void do_bool() { if (!is_return_type()) get_bool(); }
901 inline void do_char() { if (!is_return_type()) get_char(); }
902 inline void do_short() { if (!is_return_type()) get_short(); }
903 inline void do_byte() { if (!is_return_type()) get_byte(); }
904 inline void do_int() { if (!is_return_type()) get_int(); }
905 inline void do_long() { if (!is_return_type()) get_long(); }
906 inline void do_float() { if (!is_return_type()) get_float(); }
907 inline void do_double() { if (!is_return_type()) get_double(); }
908 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
909 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
910 inline void do_void() { }
911
912 JavaCallArguments* arguments() { return _arguments; }
913 void push_receiver(Handle h) { _arguments->push_oop(h); }
914 };
915
916
917 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
918 protected:
919 va_list _ap;
920
921 inline void get_bool() {
922 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
923 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
924 // TemplateInterpreterGenerator::generate_result_handler_for and
925 // SharedRuntime::generate_native_wrapper.
926 jboolean b = va_arg(_ap, jint);
927 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
928 }
929 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
930 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
931 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
932 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
933
934 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
935
936 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
937 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
938 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
939 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
940
941 inline void set_ap(va_list rap) {
942 va_copy(_ap, rap);
943 }
944
945 public:
946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
947 : JNI_ArgumentPusher(signature) {
948 set_ap(rap);
949 }
950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
952 set_ap(rap);
953 }
954
955 // Optimized path if we have the bitvector form of signature
956 void iterate( uint64_t fingerprint ) {
957 if (fingerprint == (uint64_t)CONST64(-1)) {
958 SignatureIterator::iterate(); // Must be too many arguments
959 } else {
960 _return_type = (BasicType)((fingerprint >> static_feature_size) &
961 result_feature_mask);
962
963 assert(fingerprint, "Fingerprint should not be 0");
964 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
965 while ( 1 ) {
966 switch ( fingerprint & parameter_feature_mask ) {
967 case bool_parm:
968 get_bool();
969 break;
970 case char_parm:
971 get_char();
972 break;
973 case short_parm:
974 get_short();
975 break;
976 case byte_parm:
977 get_byte();
978 break;
979 case int_parm:
980 get_int();
981 break;
982 case obj_parm:
983 get_object();
984 break;
985 case long_parm:
986 get_long();
987 break;
988 case float_parm:
989 get_float();
990 break;
991 case double_parm:
992 get_double();
993 break;
994 case done_parm:
995 return;
996 break;
997 default:
998 ShouldNotReachHere();
999 break;
1000 }
1001 fingerprint >>= parameter_feature_size;
1002 }
1003 }
1004 }
1005 };
1006
1007
1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1009 protected:
1010 const jvalue *_ap;
1011
1012 inline void get_bool() {
1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1015 // TemplateInterpreterGenerator::generate_result_handler_for and
1016 // SharedRuntime::generate_native_wrapper.
1017 jboolean b = (_ap++)->z;
1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1019 }
1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1024
1025 inline void get_long() { _arguments->push_long((_ap++)->j); }
1026 inline void get_float() { _arguments->push_float((_ap++)->f); }
1027 inline void get_double() { _arguments->push_double((_ap++)->d);}
1028 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1029
1030 inline void set_ap(const jvalue *rap) { _ap = rap; }
1031
1032 public:
1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1034 : JNI_ArgumentPusher(signature) {
1035 set_ap(rap);
1036 }
1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1039 set_ap(rap);
1040 }
1041
1042 // Optimized path if we have the bitvector form of signature
1043 void iterate( uint64_t fingerprint ) {
1044 if (fingerprint == (uint64_t)CONST64(-1)) {
1045 SignatureIterator::iterate(); // Must be too many arguments
1046 } else {
1047 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1048 result_feature_mask);
1049 assert(fingerprint, "Fingerprint should not be 0");
1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1051 while ( 1 ) {
1052 switch ( fingerprint & parameter_feature_mask ) {
1053 case bool_parm:
1054 get_bool();
1055 break;
1056 case char_parm:
1057 get_char();
1058 break;
1059 case short_parm:
1060 get_short();
1061 break;
1062 case byte_parm:
1063 get_byte();
1064 break;
1065 case int_parm:
1066 get_int();
1067 break;
1068 case obj_parm:
1069 get_object();
1070 break;
1071 case long_parm:
1072 get_long();
1073 break;
1074 case float_parm:
1075 get_float();
1076 break;
1077 case double_parm:
1078 get_double();
1079 break;
1080 case done_parm:
1081 return;
1082 break;
1083 default:
1084 ShouldNotReachHere();
1085 break;
1086 }
1087 fingerprint >>= parameter_feature_size;
1088 }
1089 }
1090 }
1091 };
1092
1093
1094 enum JNICallType {
1095 JNI_STATIC,
1096 JNI_VIRTUAL,
1097 JNI_NONVIRTUAL
1098 };
1099
1100
1101
1102 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1104
1105 // Create object to hold arguments for the JavaCall, and associate it with
1106 // the jni parser
1107 ResourceMark rm(THREAD);
1108 int number_of_parameters = method->size_of_parameters();
1109 JavaCallArguments java_args(number_of_parameters);
1110 args->set_java_argument_object(&java_args);
1111
1112 assert(method->is_static(), "method should be static");
1113
1114 // Fill out JavaCallArguments object
1115 args->iterate( Fingerprinter(method).fingerprint() );
1116 // Initialize result type
1117 result->set_type(args->get_ret_type());
1118
1119 // Invoke the method. Result is returned as oop.
1120 JavaCalls::call(result, method, &java_args, CHECK);
1121
1122 // Convert result
1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1125 }
1126 }
1127
1128
1129 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1130 oop recv = JNIHandles::resolve(receiver);
1131 if (recv == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 Handle h_recv(THREAD, recv);
1135
1136 int number_of_parameters;
1137 Method* selected_method;
1138 {
1139 Method* m = Method::resolve_jmethod_id(method_id);
1140 number_of_parameters = m->size_of_parameters();
1141 Klass* holder = m->method_holder();
1142 if (call_type != JNI_VIRTUAL) {
1143 selected_method = m;
1144 } else if (!m->has_itable_index()) {
1145 // non-interface call -- for that little speed boost, don't handlize
1146 debug_only(NoSafepointVerifier nosafepoint;)
1147 // jni_GetMethodID makes sure class is linked and initialized
1148 // so m should have a valid vtable index.
1149 assert(m->valid_vtable_index(), "no valid vtable index");
1150 int vtbl_index = m->vtable_index();
1151 if (vtbl_index != Method::nonvirtual_vtable_index) {
1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1153 } else {
1154 // final method
1155 selected_method = m;
1156 }
1157 } else {
1158 // interface call
1159 int itbl_index = m->itable_index();
1160 Klass* k = h_recv->klass();
1161 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1162 }
1163 }
1164
1165 methodHandle method(THREAD, selected_method);
1166
1167 // Create object to hold arguments for the JavaCall, and associate it with
1168 // the jni parser
1169 ResourceMark rm(THREAD);
1170 JavaCallArguments java_args(number_of_parameters);
1171 args->set_java_argument_object(&java_args);
1172
1173 // handle arguments
1174 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1175 args->push_receiver(h_recv); // Push jobject handle
1176
1177 // Fill out JavaCallArguments object
1178 args->iterate( Fingerprinter(method).fingerprint() );
1179 // Initialize result type
1180 result->set_type(args->get_ret_type());
1181
1182 // Invoke the method. Result is returned as oop.
1183 JavaCalls::call(result, method, &java_args, CHECK);
1184
1185 // Convert result
1186 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1187 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1188 }
1189 }
1190
1191
1192 static instanceOop alloc_object(jclass clazz, TRAPS) {
1193 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1194 if (k == NULL) {
1195 ResourceMark rm(THREAD);
1196 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1197 }
1198 k->check_valid_for_instantiation(false, CHECK_NULL);
1199 k->initialize(CHECK_NULL);
1200 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1201 return ih;
1202 }
1203
1204 DT_RETURN_MARK_DECL(AllocObject, jobject
1205 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1206
1207 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1208 JNIWrapper("AllocObject");
1209
1210 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1211
1212 jobject ret = NULL;
1213 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1214
1215 instanceOop i = alloc_object(clazz, CHECK_NULL);
1216 ret = JNIHandles::make_local(env, i);
1217 return ret;
1218 JNI_END
1219
1220 DT_RETURN_MARK_DECL(NewObjectA, jobject
1221 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1222
1223 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1224 JNIWrapper("NewObjectA");
1225
1226 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1227
1228 jobject obj = NULL;
1229 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1230
1231 instanceOop i = alloc_object(clazz, CHECK_NULL);
1232 obj = JNIHandles::make_local(env, i);
1233 JavaValue jvalue(T_VOID);
1234 JNI_ArgumentPusherArray ap(methodID, args);
1235 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1236 return obj;
1237 JNI_END
1238
1239
1240 DT_RETURN_MARK_DECL(NewObjectV, jobject
1241 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1242
1243 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1244 JNIWrapper("NewObjectV");
1245
1246 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1247
1248 jobject obj = NULL;
1249 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1250
1251 instanceOop i = alloc_object(clazz, CHECK_NULL);
1252 obj = JNIHandles::make_local(env, i);
1253 JavaValue jvalue(T_VOID);
1254 JNI_ArgumentPusherVaArg ap(methodID, args);
1255 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1256 return obj;
1257 JNI_END
1258
1259
1260 DT_RETURN_MARK_DECL(NewObject, jobject
1261 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1262
1263 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1264 JNIWrapper("NewObject");
1265
1266 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1267
1268 jobject obj = NULL;
1269 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1270
1271 instanceOop i = alloc_object(clazz, CHECK_NULL);
1272 obj = JNIHandles::make_local(env, i);
1273 va_list args;
1274 va_start(args, methodID);
1275 JavaValue jvalue(T_VOID);
1276 JNI_ArgumentPusherVaArg ap(methodID, args);
1277 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1278 va_end(args);
1279 return obj;
1280 JNI_END
1281
1282
1283 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1284 JNIWrapper("GetObjectClass");
1285
1286 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1287
1288 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1289 jclass ret =
1290 (jclass) JNIHandles::make_local(env, k->java_mirror());
1291
1292 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1293 return ret;
1294 JNI_END
1295
1296 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1297 JNIWrapper("IsInstanceOf");
1298
1299 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1300
1301 jboolean ret = JNI_TRUE;
1302 if (obj != NULL) {
1303 ret = JNI_FALSE;
1304 Klass* k = java_lang_Class::as_Klass(
1305 JNIHandles::resolve_non_null(clazz));
1306 if (k != NULL) {
1307 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1308 }
1309 }
1310
1311 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1312 return ret;
1313 JNI_END
1314
1315
1316 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1317 const char *sig, bool is_static, TRAPS) {
1318 // %%%% This code should probably just call into a method in the LinkResolver
1319 //
1320 // The class should have been loaded (we have an instance of the class
1321 // passed in) so the method and signature should already be in the symbol
1322 // table. If they're not there, the method doesn't exist.
1323 const char *name_to_probe = (name_str == NULL)
1324 ? vmSymbols::object_initializer_name()->as_C_string()
1325 : name_str;
1326 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1327 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1328
1329 if (name == NULL || signature == NULL) {
1330 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1331 }
1332
1333 // Throw a NoSuchMethodError exception if we have an instance of a
1334 // primitive java.lang.Class
1335 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1336 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1337 }
1338
1339 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1340
1341 // Make sure class is linked and initialized before handing id's out to
1342 // Method*s.
1343 klass->initialize(CHECK_NULL);
1344
1345 Method* m;
1346 if (name == vmSymbols::object_initializer_name() ||
1347 name == vmSymbols::class_initializer_name()) {
1348 // Never search superclasses for constructors
1349 if (klass->is_instance_klass()) {
1350 m = InstanceKlass::cast(klass)->find_method(name, signature);
1351 } else {
1352 m = NULL;
1353 }
1354 } else {
1355 m = klass->lookup_method(name, signature);
1356 if (m == NULL && klass->is_instance_klass()) {
1357 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1358 }
1359 }
1360 if (m == NULL || (m->is_static() != is_static)) {
1361 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1362 }
1363 return m->jmethod_id();
1364 }
1365
1366
1367 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1368 const char *name, const char *sig))
1369 JNIWrapper("GetMethodID");
1370 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1371 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1372 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1373 return ret;
1374 JNI_END
1375
1376
1377 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1378 const char *name, const char *sig))
1379 JNIWrapper("GetStaticMethodID");
1380 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1381 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1382 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1383 return ret;
1384 JNI_END
1385
1386
1387
1388 //
1389 // Calling Methods
1390 //
1391
1392
1393 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1394 , EntryProbe, ReturnProbe) \
1395 \
1396 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1397 , ReturnProbe); \
1398 \
1399 JNI_ENTRY(ResultType, \
1400 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1401 JNIWrapper("Call" XSTR(Result) "Method"); \
1402 \
1403 EntryProbe; \
1404 ResultType ret = 0;\
1405 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1406 (const ResultType&)ret);\
1407 \
1408 va_list args; \
1409 va_start(args, methodID); \
1410 JavaValue jvalue(Tag); \
1411 JNI_ArgumentPusherVaArg ap(methodID, args); \
1412 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1413 va_end(args); \
1414 ret = jvalue.get_##ResultType(); \
1415 return ret;\
1416 JNI_END
1417
1418 // the runtime type of subword integral basic types is integer
1419 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1420 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1423 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1426 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1429 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1431
1432 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1433 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jint, Int, T_INT,
1436 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1439 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1441 // Float and double probes don't return value because dtrace doesn't currently support it
1442 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1443 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1445 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1446 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1448
1449 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1450 , EntryProbe, ReturnProbe) \
1451 \
1452 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1453 , ReturnProbe); \
1454 \
1455 JNI_ENTRY(ResultType, \
1456 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1457 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1458 \
1459 EntryProbe;\
1460 ResultType ret = 0;\
1461 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1462 (const ResultType&)ret);\
1463 \
1464 JavaValue jvalue(Tag); \
1465 JNI_ArgumentPusherVaArg ap(methodID, args); \
1466 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1467 ret = jvalue.get_##ResultType(); \
1468 return ret;\
1469 JNI_END
1470
1471 // the runtime type of subword integral basic types is integer
1472 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1473 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1476 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1479 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1482 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1484
1485 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1486 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jint, Int, T_INT,
1489 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1492 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1494 // Float and double probes don't return value because dtrace doesn't currently support it
1495 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1496 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1498 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1499 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1501
1502 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1503 , EntryProbe, ReturnProbe) \
1504 \
1505 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1506 , ReturnProbe); \
1507 \
1508 JNI_ENTRY(ResultType, \
1509 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1510 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1511 EntryProbe; \
1512 ResultType ret = 0;\
1513 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1514 (const ResultType&)ret);\
1515 \
1516 JavaValue jvalue(Tag); \
1517 JNI_ArgumentPusherArray ap(methodID, args); \
1518 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1519 ret = jvalue.get_##ResultType(); \
1520 return ret;\
1521 JNI_END
1522
1523 // the runtime type of subword integral basic types is integer
1524 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1525 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1528 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1531 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1534 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1536
1537 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1538 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jint, Int, T_INT,
1541 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1544 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1546 // Float and double probes don't return value because dtrace doesn't currently support it
1547 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1548 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1550 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1551 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1553
1554 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1557
1558
1559 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1560 JNIWrapper("CallVoidMethod");
1561 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1562 DT_VOID_RETURN_MARK(CallVoidMethod);
1563
1564 va_list args;
1565 va_start(args, methodID);
1566 JavaValue jvalue(T_VOID);
1567 JNI_ArgumentPusherVaArg ap(methodID, args);
1568 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1569 va_end(args);
1570 JNI_END
1571
1572
1573 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1574 JNIWrapper("CallVoidMethodV");
1575 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1576 DT_VOID_RETURN_MARK(CallVoidMethodV);
1577
1578 JavaValue jvalue(T_VOID);
1579 JNI_ArgumentPusherVaArg ap(methodID, args);
1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1581 JNI_END
1582
1583
1584 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1585 JNIWrapper("CallVoidMethodA");
1586 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1587 DT_VOID_RETURN_MARK(CallVoidMethodA);
1588
1589 JavaValue jvalue(T_VOID);
1590 JNI_ArgumentPusherArray ap(methodID, args);
1591 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1592 JNI_END
1593
1594
1595
1596 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1597 , EntryProbe, ReturnProbe) \
1598 \
1599 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1600 , ReturnProbe);\
1601 \
1602 JNI_ENTRY(ResultType, \
1603 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1604 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1605 \
1606 EntryProbe;\
1607 ResultType ret;\
1608 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1609 (const ResultType&)ret);\
1610 \
1611 va_list args; \
1612 va_start(args, methodID); \
1613 JavaValue jvalue(Tag); \
1614 JNI_ArgumentPusherVaArg ap(methodID, args); \
1615 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1616 va_end(args); \
1617 ret = jvalue.get_##ResultType(); \
1618 return ret;\
1619 JNI_END
1620
1621 // the runtime type of subword integral basic types is integer
1622 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1623 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1626 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1629 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1632 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1634
1635 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1636 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1639 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1642 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 // Float and double probes don't return value because dtrace doesn't currently support it
1644 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1645 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1646 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1648 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1649 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1651
1652 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1653 , EntryProbe, ReturnProbe) \
1654 \
1655 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1656 , ReturnProbe);\
1657 \
1658 JNI_ENTRY(ResultType, \
1659 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1660 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1661 \
1662 EntryProbe;\
1663 ResultType ret;\
1664 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1665 (const ResultType&)ret);\
1666 \
1667 JavaValue jvalue(Tag); \
1668 JNI_ArgumentPusherVaArg ap(methodID, args); \
1669 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1670 ret = jvalue.get_##ResultType(); \
1671 return ret;\
1672 JNI_END
1673
1674 // the runtime type of subword integral basic types is integer
1675 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1676 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1678 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1679 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1682 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1685 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1687
1688 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1689 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1692 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1695 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1698 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1699 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1701 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1702 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1704
1705 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1706 , EntryProbe, ReturnProbe) \
1707 \
1708 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1709 , ReturnProbe);\
1710 \
1711 JNI_ENTRY(ResultType, \
1712 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1713 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1714 \
1715 EntryProbe;\
1716 ResultType ret;\
1717 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1718 (const ResultType&)ret);\
1719 \
1720 JavaValue jvalue(Tag); \
1721 JNI_ArgumentPusherArray ap(methodID, args); \
1722 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1723 ret = jvalue.get_##ResultType(); \
1724 return ret;\
1725 JNI_END
1726
1727 // the runtime type of subword integral basic types is integer
1728 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1729 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1731 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1732 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1735 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1738 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1740
1741 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1742 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1745 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1748 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 // Float and double probes don't return value because dtrace doesn't currently support it
1750 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1751 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1752 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1754 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1755 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1757
1758 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1759 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1764
1765 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1766 JNIWrapper("CallNonvirtualVoidMethod");
1767
1768 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1769 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1770
1771 va_list args;
1772 va_start(args, methodID);
1773 JavaValue jvalue(T_VOID);
1774 JNI_ArgumentPusherVaArg ap(methodID, args);
1775 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1776 va_end(args);
1777 JNI_END
1778
1779
1780 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1781 JNIWrapper("CallNonvirtualVoidMethodV");
1782
1783 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1784 env, obj, cls, (uintptr_t) methodID);
1785 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1786
1787 JavaValue jvalue(T_VOID);
1788 JNI_ArgumentPusherVaArg ap(methodID, args);
1789 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1790 JNI_END
1791
1792
1793 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1794 JNIWrapper("CallNonvirtualVoidMethodA");
1795 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1796 env, obj, cls, (uintptr_t) methodID);
1797 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1798 JavaValue jvalue(T_VOID);
1799 JNI_ArgumentPusherArray ap(methodID, args);
1800 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1801 JNI_END
1802
1803
1804
1805 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1806 , EntryProbe, ResultProbe) \
1807 \
1808 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1809 , ResultProbe); \
1810 \
1811 JNI_ENTRY(ResultType, \
1812 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1813 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1814 \
1815 EntryProbe; \
1816 ResultType ret = 0;\
1817 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1818 (const ResultType&)ret);\
1819 \
1820 va_list args; \
1821 va_start(args, methodID); \
1822 JavaValue jvalue(Tag); \
1823 JNI_ArgumentPusherVaArg ap(methodID, args); \
1824 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1825 va_end(args); \
1826 ret = jvalue.get_##ResultType(); \
1827 return ret;\
1828 JNI_END
1829
1830 // the runtime type of subword integral basic types is integer
1831 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1832 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1835 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1838 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1841 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1843
1844 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1845 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1848 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1851 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1853 // Float and double probes don't return value because dtrace doesn't currently support it
1854 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1855 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1857 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1858 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1860
1861 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1862 , EntryProbe, ResultProbe) \
1863 \
1864 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1865 , ResultProbe); \
1866 \
1867 JNI_ENTRY(ResultType, \
1868 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1869 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1870 \
1871 EntryProbe; \
1872 ResultType ret = 0;\
1873 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1874 (const ResultType&)ret);\
1875 \
1876 JavaValue jvalue(Tag); \
1877 JNI_ArgumentPusherVaArg ap(methodID, args); \
1878 /* Make sure class is initialized before trying to invoke its method */ \
1879 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1880 k->initialize(CHECK_0); \
1881 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1882 va_end(args); \
1883 ret = jvalue.get_##ResultType(); \
1884 return ret;\
1885 JNI_END
1886
1887 // the runtime type of subword integral basic types is integer
1888 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1889 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1891 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1892 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1895 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1898 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1900
1901 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1902 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1905 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1908 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1910 // Float and double probes don't return value because dtrace doesn't currently support it
1911 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1912 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1914 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1915 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1917
1918 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1919 , EntryProbe, ResultProbe) \
1920 \
1921 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1922 , ResultProbe); \
1923 \
1924 JNI_ENTRY(ResultType, \
1925 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1926 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1927 \
1928 EntryProbe; \
1929 ResultType ret = 0;\
1930 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1931 (const ResultType&)ret);\
1932 \
1933 JavaValue jvalue(Tag); \
1934 JNI_ArgumentPusherArray ap(methodID, args); \
1935 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1936 ret = jvalue.get_##ResultType(); \
1937 return ret;\
1938 JNI_END
1939
1940 // the runtime type of subword integral basic types is integer
1941 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1942 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1944 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1945 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1948 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1951 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1953
1954 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1955 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1958 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1961 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1963 // Float and double probes don't return value because dtrace doesn't currently support it
1964 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1965 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1967 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1968 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1970
1971 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1972 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1977
1978 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1979 JNIWrapper("CallStaticVoidMethod");
1980 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1981 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1982
1983 va_list args;
1984 va_start(args, methodID);
1985 JavaValue jvalue(T_VOID);
1986 JNI_ArgumentPusherVaArg ap(methodID, args);
1987 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1988 va_end(args);
1989 JNI_END
1990
1991
1992 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1993 JNIWrapper("CallStaticVoidMethodV");
1994 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1995 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1996
1997 JavaValue jvalue(T_VOID);
1998 JNI_ArgumentPusherVaArg ap(methodID, args);
1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2000 JNI_END
2001
2002
2003 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2004 JNIWrapper("CallStaticVoidMethodA");
2005 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2006 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2007
2008 JavaValue jvalue(T_VOID);
2009 JNI_ArgumentPusherArray ap(methodID, args);
2010 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2011 JNI_END
2012
2013
2014 //
2015 // Accessing Fields
2016 //
2017
2018
2019 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2020 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2021
2022 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2023 const char *name, const char *sig))
2024 JNIWrapper("GetFieldID");
2025 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2026 jfieldID ret = 0;
2027 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2028
2029 // The class should have been loaded (we have an instance of the class
2030 // passed in) so the field and signature should already be in the symbol
2031 // table. If they're not there, the field doesn't exist.
2032 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2033 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2034 if (fieldname == NULL || signame == NULL) {
2035 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2036 }
2037 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2038 // Make sure class is initialized before handing id's out to fields
2039 k->initialize(CHECK_NULL);
2040
2041 fieldDescriptor fd;
2042 if (!k->is_instance_klass() ||
2043 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2044 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2045 }
2046
2047 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2048 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2049 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2050 return ret;
2051 JNI_END
2052
2053
2054 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2055 JNIWrapper("GetObjectField");
2056 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2057 oop o = JNIHandles::resolve_non_null(obj);
2058 Klass* k = o->klass();
2059 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2060 // Keep JVMTI addition small and only check enabled flag here.
2061 // jni_GetField_probe() assumes that is okay to create handles.
2062 if (JvmtiExport::should_post_field_access()) {
2063 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2064 }
2065 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2066 jobject ret = JNIHandles::make_local(env, loaded_obj);
2067 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2068 return ret;
2069 JNI_END
2070
2071
2072
2073 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2074 , EntryProbe, ReturnProbe) \
2075 \
2076 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2077 , ReturnProbe); \
2078 \
2079 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2080 JNIWrapper("Get" XSTR(Result) "Field"); \
2081 \
2082 EntryProbe; \
2083 Return ret = 0;\
2084 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2085 \
2086 oop o = JNIHandles::resolve_non_null(obj); \
2087 Klass* k = o->klass(); \
2088 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2089 /* Keep JVMTI addition small and only check enabled flag here. */ \
2090 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2091 /* and creates a ResetNoHandleMark. */ \
2092 if (JvmtiExport::should_post_field_access()) { \
2093 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2094 } \
2095 ret = o->Fieldname##_field(offset); \
2096 return ret; \
2097 JNI_END
2098
2099 DEFINE_GETFIELD(jboolean, bool, Boolean
2100 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2101 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2102 DEFINE_GETFIELD(jbyte, byte, Byte
2103 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2104 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2105 DEFINE_GETFIELD(jchar, char, Char
2106 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2107 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2108 DEFINE_GETFIELD(jshort, short, Short
2109 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2110 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2111 DEFINE_GETFIELD(jint, int, Int
2112 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2113 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2114 DEFINE_GETFIELD(jlong, long, Long
2115 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2116 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2117 // Float and double probes don't return value because dtrace doesn't currently support it
2118 DEFINE_GETFIELD(jfloat, float, Float
2119 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2120 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2121 DEFINE_GETFIELD(jdouble, double, Double
2122 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2124
2125 address jni_GetBooleanField_addr() {
2126 return (address)jni_GetBooleanField;
2127 }
2128 address jni_GetByteField_addr() {
2129 return (address)jni_GetByteField;
2130 }
2131 address jni_GetCharField_addr() {
2132 return (address)jni_GetCharField;
2133 }
2134 address jni_GetShortField_addr() {
2135 return (address)jni_GetShortField;
2136 }
2137 address jni_GetIntField_addr() {
2138 return (address)jni_GetIntField;
2139 }
2140 address jni_GetLongField_addr() {
2141 return (address)jni_GetLongField;
2142 }
2143 address jni_GetFloatField_addr() {
2144 return (address)jni_GetFloatField;
2145 }
2146 address jni_GetDoubleField_addr() {
2147 return (address)jni_GetDoubleField;
2148 }
2149
2150 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2151 JNIWrapper("SetObjectField");
2152 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2153 oop o = JNIHandles::resolve_non_null(obj);
2154 Klass* k = o->klass();
2155 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2156 // Keep JVMTI addition small and only check enabled flag here.
2157 // jni_SetField_probe_nh() assumes that is not okay to create handles
2158 // and creates a ResetNoHandleMark.
2159 if (JvmtiExport::should_post_field_modification()) {
2160 jvalue field_value;
2161 field_value.l = value;
2162 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2163 }
2164 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2165 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2166 JNI_END
2167
2168
2169 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2170 , EntryProbe, ReturnProbe) \
2171 \
2172 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2173 JNIWrapper("Set" XSTR(Result) "Field"); \
2174 \
2175 EntryProbe; \
2176 \
2177 oop o = JNIHandles::resolve_non_null(obj); \
2178 Klass* k = o->klass(); \
2179 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2180 /* Keep JVMTI addition small and only check enabled flag here. */ \
2181 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2182 /* and creates a ResetNoHandleMark. */ \
2183 if (JvmtiExport::should_post_field_modification()) { \
2184 jvalue field_value; \
2185 field_value.unionType = value; \
2186 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2187 } \
2188 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2189 o->Fieldname##_field_put(offset, value); \
2190 ReturnProbe; \
2191 JNI_END
2192
2193 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2194 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2195 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2196 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2197 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2198 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2199 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2200 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2201 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2202 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2203 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2204 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2205 DEFINE_SETFIELD(jint, int, Int, 'I', i
2206 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2207 HOTSPOT_JNI_SETINTFIELD_RETURN())
2208 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2209 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2210 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2211 // Float and double probes don't return value because dtrace doesn't currently support it
2212 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2213 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2214 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2215 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2216 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2217 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2218
2219 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2220 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2221
2222 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2223 JNIWrapper("ToReflectedField");
2224 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2225 jobject ret = NULL;
2226 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2227
2228 fieldDescriptor fd;
2229 bool found = false;
2230 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2231
2232 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2233
2234 if (isStatic) {
2235 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2236 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2237 assert(id->is_static_field_id(), "invalid static field id");
2238 found = id->find_local_field(&fd);
2239 } else {
2240 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2241 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2242 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2243 }
2244 assert(found, "bad fieldID passed into jni_ToReflectedField");
2245 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2246 ret = JNIHandles::make_local(env, reflected);
2247 return ret;
2248 JNI_END
2249
2250
2251 //
2252 // Accessing Static Fields
2253 //
2254 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2255 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2256
2257 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2258 const char *name, const char *sig))
2259 JNIWrapper("GetStaticFieldID");
2260 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2261 jfieldID ret = NULL;
2262 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2263
2264 // The class should have been loaded (we have an instance of the class
2265 // passed in) so the field and signature should already be in the symbol
2266 // table. If they're not there, the field doesn't exist.
2267 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2268 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2269 if (fieldname == NULL || signame == NULL) {
2270 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2271 }
2272 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2273 // Make sure class is initialized before handing id's out to static fields
2274 k->initialize(CHECK_NULL);
2275
2276 fieldDescriptor fd;
2277 if (!k->is_instance_klass() ||
2278 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2279 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2280 }
2281
2282 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2283 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2284 debug_only(id->set_is_static_field_id();)
2285
2286 debug_only(id->verify(fd.field_holder()));
2287
2288 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2289 return ret;
2290 JNI_END
2291
2292
2293 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2294 JNIWrapper("GetStaticObjectField");
2295 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2296 #if INCLUDE_JNI_CHECK
2297 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2298 #endif // INCLUDE_JNI_CHECK
2299 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2300 assert(id->is_static_field_id(), "invalid static field id");
2301 // Keep JVMTI addition small and only check enabled flag here.
2302 // jni_GetField_probe() assumes that is okay to create handles.
2303 if (JvmtiExport::should_post_field_access()) {
2304 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2305 }
2306 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2307 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2308 return ret;
2309 JNI_END
2310
2311
2312 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2313 , EntryProbe, ReturnProbe) \
2314 \
2315 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2316 , ReturnProbe); \
2317 \
2318 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2319 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2320 EntryProbe; \
2321 Return ret = 0;\
2322 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2323 (const Return&)ret);\
2324 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2325 assert(id->is_static_field_id(), "invalid static field id"); \
2326 /* Keep JVMTI addition small and only check enabled flag here. */ \
2327 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2328 if (JvmtiExport::should_post_field_access()) { \
2329 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2330 } \
2331 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2332 return ret;\
2333 JNI_END
2334
2335 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2336 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2337 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2338 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2339 DEFINE_GETSTATICFIELD(jchar, char, Char
2340 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2341 DEFINE_GETSTATICFIELD(jshort, short, Short
2342 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2343 DEFINE_GETSTATICFIELD(jint, int, Int
2344 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2345 DEFINE_GETSTATICFIELD(jlong, long, Long
2346 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2347 // Float and double probes don't return value because dtrace doesn't currently support it
2348 DEFINE_GETSTATICFIELD(jfloat, float, Float
2349 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2350 DEFINE_GETSTATICFIELD(jdouble, double, Double
2351 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2352
2353 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2354 JNIWrapper("SetStaticObjectField");
2355 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2356 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2357 assert(id->is_static_field_id(), "invalid static field id");
2358 // Keep JVMTI addition small and only check enabled flag here.
2359 // jni_SetField_probe() assumes that is okay to create handles.
2360 if (JvmtiExport::should_post_field_modification()) {
2361 jvalue field_value;
2362 field_value.l = value;
2363 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2364 }
2365 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2366 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2367 JNI_END
2368
2369
2370
2371 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2372 , EntryProbe, ReturnProbe) \
2373 \
2374 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2375 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2376 EntryProbe; \
2377 \
2378 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2379 assert(id->is_static_field_id(), "invalid static field id"); \
2380 /* Keep JVMTI addition small and only check enabled flag here. */ \
2381 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2382 if (JvmtiExport::should_post_field_modification()) { \
2383 jvalue field_value; \
2384 field_value.unionType = value; \
2385 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2386 } \
2387 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2388 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2389 ReturnProbe;\
2390 JNI_END
2391
2392 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2393 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2394 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2395 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2396 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2397 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2398 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2399 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2400 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2401 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2402 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2403 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2404 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2405 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2406 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2407 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2408 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2409 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2410 // Float and double probes don't return value because dtrace doesn't currently support it
2411 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2412 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2413 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2414 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2415 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2416 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2417
2418 //
2419 // String Operations
2420 //
2421
2422 // Unicode Interface
2423
2424 DT_RETURN_MARK_DECL(NewString, jstring
2425 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2426
2427 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2428 JNIWrapper("NewString");
2429 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2430 jstring ret = NULL;
2431 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2432 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2433 ret = (jstring) JNIHandles::make_local(env, string);
2434 return ret;
2435 JNI_END
2436
2437
2438 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2439 JNIWrapper("GetStringLength");
2440 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2441 jsize ret = 0;
2442 oop s = JNIHandles::resolve_non_null(string);
2443 if (java_lang_String::value(s) != NULL) {
2444 ret = java_lang_String::length(s);
2445 }
2446 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2447 return ret;
2448 JNI_END
2449
2450
2451 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2452 JNIEnv *env, jstring string, jboolean *isCopy))
2453 JNIWrapper("GetStringChars");
2454 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2455 jchar* buf = NULL;
2456 oop s = JNIHandles::resolve_non_null(string);
2457 typeArrayOop s_value = java_lang_String::value(s);
2458 if (s_value != NULL) {
2459 int s_len = java_lang_String::length(s);
2460 bool is_latin1 = java_lang_String::is_latin1(s);
2461 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2462 /* JNI Specification states return NULL on OOM */
2463 if (buf != NULL) {
2464 if (s_len > 0) {
2465 if (!is_latin1) {
2466 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2467 } else {
2468 for (int i = 0; i < s_len; i++) {
2469 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2470 }
2471 }
2472 }
2473 buf[s_len] = 0;
2474 //%note jni_5
2475 if (isCopy != NULL) {
2476 *isCopy = JNI_TRUE;
2477 }
2478 }
2479 }
2480 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2481 return buf;
2482 JNI_END
2483
2484
2485 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2486 JNIWrapper("ReleaseStringChars");
2487 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2488 //%note jni_6
2489 if (chars != NULL) {
2490 // Since String objects are supposed to be immutable, don't copy any
2491 // new data back. A bad user will have to go after the char array.
2492 FreeHeap((void*) chars);
2493 }
2494 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2495 JNI_END
2496
2497
2498 // UTF Interface
2499
2500 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2501 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2502
2503 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2504 JNIWrapper("NewStringUTF");
2505 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2506 jstring ret;
2507 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2508
2509 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2510 ret = (jstring) JNIHandles::make_local(env, result);
2511 return ret;
2512 JNI_END
2513
2514
2515 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2516 JNIWrapper("GetStringUTFLength");
2517 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2518 jsize ret = 0;
2519 oop java_string = JNIHandles::resolve_non_null(string);
2520 if (java_lang_String::value(java_string) != NULL) {
2521 ret = java_lang_String::utf8_length(java_string);
2522 }
2523 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2524 return ret;
2525 JNI_END
2526
2527
2528 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2529 JNIWrapper("GetStringUTFChars");
2530 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2531 char* result = NULL;
2532 oop java_string = JNIHandles::resolve_non_null(string);
2533 if (java_lang_String::value(java_string) != NULL) {
2534 size_t length = java_lang_String::utf8_length(java_string);
2535 /* JNI Specification states return NULL on OOM */
2536 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2537 if (result != NULL) {
2538 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2539 if (isCopy != NULL) {
2540 *isCopy = JNI_TRUE;
2541 }
2542 }
2543 }
2544 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2545 return result;
2546 JNI_END
2547
2548
2549 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2550 JNIWrapper("ReleaseStringUTFChars");
2551 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2552 if (chars != NULL) {
2553 FreeHeap((char*) chars);
2554 }
2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2556 JNI_END
2557
2558
2559 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2560 JNIWrapper("GetArrayLength");
2561 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2562 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2563 assert(a->is_array(), "must be array");
2564 jsize ret = a->length();
2565 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2566 return ret;
2567 JNI_END
2568
2569
2570 //
2571 // Object Array Operations
2572 //
2573
2574 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2575 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2576
2577 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2578 JNIWrapper("NewObjectArray");
2579 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2580 jobjectArray ret = NULL;
2581 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2582 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2583 Klass* ak = ek->array_klass(CHECK_NULL);
2584 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2585 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2586 oop initial_value = JNIHandles::resolve(initialElement);
2587 if (initial_value != NULL) { // array already initialized with NULL
2588 for (int index = 0; index < length; index++) {
2589 result->obj_at_put(index, initial_value);
2590 }
2591 }
2592 ret = (jobjectArray) JNIHandles::make_local(env, result);
2593 return ret;
2594 JNI_END
2595
2596 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2597 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2598
2599 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2600 JNIWrapper("GetObjectArrayElement");
2601 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2602 jobject ret = NULL;
2603 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2604 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2605 if (a->is_within_bounds(index)) {
2606 ret = JNIHandles::make_local(env, a->obj_at(index));
2607 return ret;
2608 } else {
2609 char buf[jintAsStringSize];
2610 sprintf(buf, "%d", index);
2611 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2612 }
2613 JNI_END
2614
2615 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2616 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2617
2618 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2619 JNIWrapper("SetObjectArrayElement");
2620 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2621 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2622
2623 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2624 oop v = JNIHandles::resolve(value);
2625 if (a->is_within_bounds(index)) {
2626 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2627 a->obj_at_put(index, v);
2628 } else {
2629 THROW(vmSymbols::java_lang_ArrayStoreException());
2630 }
2631 } else {
2632 char buf[jintAsStringSize];
2633 sprintf(buf, "%d", index);
2634 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2635 }
2636 JNI_END
2637
2638
2639
2640 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2641 ,EntryProbe,ReturnProbe) \
2642 \
2643 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2644 , ReturnProbe); \
2645 \
2646 JNI_ENTRY(Return, \
2647 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2648 JNIWrapper("New" XSTR(Result) "Array"); \
2649 EntryProbe; \
2650 Return ret = NULL;\
2651 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2652 \
2653 oop obj= oopFactory::Allocator(len, CHECK_0); \
2654 ret = (Return) JNIHandles::make_local(env, obj); \
2655 return ret;\
2656 JNI_END
2657
2658 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2659 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2660 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2661 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2662 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2663 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2664 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2665 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2666 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2667 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2668 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2669 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2670 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2671 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2672 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2673 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2674 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2675 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2676 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2677 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2680 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2682
2683 // Return an address which will fault if the caller writes to it.
2684
2685 static char* get_bad_address() {
2686 static char* bad_address = NULL;
2687 if (bad_address == NULL) {
2688 size_t size = os::vm_allocation_granularity();
2689 bad_address = os::reserve_memory(size);
2690 if (bad_address != NULL) {
2691 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2692 /*is_committed*/false);
2693 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2694 }
2695 }
2696 return bad_address;
2697 }
2698
2699
2700
2701 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2702 , EntryProbe, ReturnProbe) \
2703 \
2704 JNI_QUICK_ENTRY(ElementType*, \
2705 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2706 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2707 EntryProbe; \
2708 /* allocate an chunk of memory in c land */ \
2709 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2710 ElementType* result; \
2711 int len = a->length(); \
2712 if (len == 0) { \
2713 /* Empty array: legal but useless, can't return NULL. \
2714 * Return a pointer to something useless. \
2715 * Avoid asserts in typeArrayOop. */ \
2716 result = (ElementType*)get_bad_address(); \
2717 } else { \
2718 /* JNI Specification states return NULL on OOM */ \
2719 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2720 if (result != NULL) { \
2721 /* copy the array to the c chunk */ \
2722 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2723 if (isCopy) { \
2724 *isCopy = JNI_TRUE; \
2725 } \
2726 } \
2727 } \
2728 ReturnProbe; \
2729 return result; \
2730 JNI_END
2731
2732 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2733 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2734 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2735 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2736 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2737 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2738 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2739 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2740 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2741 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2742 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2743 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2744 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2745 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2746 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2747 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2748 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2750 // Float and double probes don't return value because dtrace doesn't currently support it
2751 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2752 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2753 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2754 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2755 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2757
2758
2759 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2760 , EntryProbe, ReturnProbe);\
2761 \
2762 JNI_QUICK_ENTRY(void, \
2763 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2764 ElementType *buf, jint mode)) \
2765 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2766 EntryProbe; \
2767 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2768 int len = a->length(); \
2769 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2770 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2771 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2772 } \
2773 if ((mode == 0) || (mode == JNI_ABORT)) { \
2774 FreeHeap(buf); \
2775 } \
2776 } \
2777 ReturnProbe; \
2778 JNI_END
2779
2780 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2781 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2782 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2783 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2784 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2785 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2786 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2787 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2788 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2790 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2791 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2793 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2794 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2796 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2797 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2799 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2800 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2802 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2803 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2804
2805
2806 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2807 , EntryProbe, ReturnProbe); \
2808 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2809 , ReturnProbe); \
2810 \
2811 JNI_ENTRY(void, \
2812 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2813 jsize len, ElementType *buf)) \
2814 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2815 EntryProbe; \
2816 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2817 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2818 if (start < 0 || len < 0 || (start > src->length() - len)) { \
2819 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2820 } else { \
2821 if (len > 0) { \
2822 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2823 memcpy((u_char*) buf, \
2824 (u_char*) src->Tag##_at_addr(start), \
2825 len << sc); \
2826 } \
2827 } \
2828 JNI_END
2829
2830 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2831 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2832 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2833 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2834 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2835 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2836 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2837 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2838 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2839 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2840 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2841 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2842 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2843 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2844 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2846 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2847 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2849 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2850 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2852 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2853 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2854
2855
2856 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2857 , EntryProbe, ReturnProbe); \
2858 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2859 ,ReturnProbe); \
2860 \
2861 JNI_ENTRY(void, \
2862 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2863 jsize len, const ElementType *buf)) \
2864 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2865 EntryProbe; \
2866 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2867 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2868 if (start < 0 || len < 0 || (start > dst->length() - len)) { \
2869 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2870 } else { \
2871 if (len > 0) { \
2872 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2873 memcpy((u_char*) dst->Tag##_at_addr(start), \
2874 (u_char*) buf, \
2875 len << sc); \
2876 } \
2877 } \
2878 JNI_END
2879
2880 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2881 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2882 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2883 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2884 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2885 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2886 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2887 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2888 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2889 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2890 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2891 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2892 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2893 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2894 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2896 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2897 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2899 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2900 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2902 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2903 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2904
2905
2906 //
2907 // Interception of natives
2908 //
2909
2910 // The RegisterNatives call being attempted tried to register with a method that
2911 // is not native. Ask JVM TI what prefixes have been specified. Then check
2912 // to see if the native method is now wrapped with the prefixes. See the
2913 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2914 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2915 #if INCLUDE_JVMTI
2916 ResourceMark rm(THREAD);
2917 Method* method;
2918 int name_len = name->utf8_length();
2919 char* name_str = name->as_utf8();
2920 int prefix_count;
2921 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2922 for (int i = 0; i < prefix_count; i++) {
2923 char* prefix = prefixes[i];
2924 int prefix_len = (int)strlen(prefix);
2925
2926 // try adding this prefix to the method name and see if it matches another method name
2927 int trial_len = name_len + prefix_len;
2928 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2929 strcpy(trial_name_str, prefix);
2930 strcat(trial_name_str, name_str);
2931 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2932 if (trial_name == NULL) {
2933 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2934 }
2935 method = k->lookup_method(trial_name, signature);
2936 if (method == NULL) {
2937 continue; // signature doesn't match, try the next prefix
2938 }
2939 if (method->is_native()) {
2940 method->set_is_prefixed_native();
2941 return method; // wahoo, we found a prefixed version of the method, return it
2942 }
2943 // found as non-native, so prefix is good, add it, probably just need more prefixes
2944 name_len = trial_len;
2945 name_str = trial_name_str;
2946 }
2947 #endif // INCLUDE_JVMTI
2948 return NULL; // not found
2949 }
2950
2951 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2952 Method* method = k->lookup_method(name, signature);
2953 if (method == NULL) {
2954 ResourceMark rm;
2955 stringStream st;
2956 st.print("Method %s name or signature does not match",
2957 Method::name_and_sig_as_C_string(k, name, signature));
2958 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2959 }
2960 if (!method->is_native()) {
2961 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2962 method = find_prefixed_native(k, name, signature, THREAD);
2963 if (method == NULL) {
2964 ResourceMark rm;
2965 stringStream st;
2966 st.print("Method %s is not declared as native",
2967 Method::name_and_sig_as_C_string(k, name, signature));
2968 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2969 }
2970 }
2971
2972 if (entry != NULL) {
2973 method->set_native_function(entry,
2974 Method::native_bind_event_is_interesting);
2975 } else {
2976 method->clear_native_function();
2977 }
2978 if (PrintJNIResolving) {
2979 ResourceMark rm(THREAD);
2980 tty->print_cr("[Registering JNI native method %s.%s]",
2981 method->method_holder()->external_name(),
2982 method->name()->as_C_string());
2983 }
2984 return true;
2985 }
2986
2987 DT_RETURN_MARK_DECL(RegisterNatives, jint
2988 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2989
2990 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2991 const JNINativeMethod *methods,
2992 jint nMethods))
2993 JNIWrapper("RegisterNatives");
2994 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2995 jint ret = 0;
2996 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2997
2998 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2999
3000 for (int index = 0; index < nMethods; index++) {
3001 const char* meth_name = methods[index].name;
3002 const char* meth_sig = methods[index].signature;
3003 int meth_name_len = (int)strlen(meth_name);
3004
3005 // The class should have been loaded (we have an instance of the class
3006 // passed in) so the method and signature should already be in the symbol
3007 // table. If they're not there, the method doesn't exist.
3008 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3009 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3010
3011 if (name == NULL || signature == NULL) {
3012 ResourceMark rm;
3013 stringStream st;
3014 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3015 // Must return negative value on failure
3016 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3017 }
3018
3019 bool res = register_native(k, name, signature,
3020 (address) methods[index].fnPtr, THREAD);
3021 if (!res) {
3022 ret = -1;
3023 break;
3024 }
3025 }
3026 return ret;
3027 JNI_END
3028
3029
3030 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3031 JNIWrapper("UnregisterNatives");
3032 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3033 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3034 //%note jni_2
3035 if (k->is_instance_klass()) {
3036 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3037 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3038 if (m->is_native()) {
3039 m->clear_native_function();
3040 m->set_signature_handler(NULL);
3041 }
3042 }
3043 }
3044 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3045 return 0;
3046 JNI_END
3047
3048 //
3049 // Monitor functions
3050 //
3051
3052 DT_RETURN_MARK_DECL(MonitorEnter, jint
3053 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3054
3055 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3056 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3057 jint ret = JNI_ERR;
3058 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3059
3060 // If the object is null, we can't do anything with it
3061 if (jobj == NULL) {
3062 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3063 }
3064
3065 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3066 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3067 ret = JNI_OK;
3068 return ret;
3069 JNI_END
3070
3071 DT_RETURN_MARK_DECL(MonitorExit, jint
3072 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3073
3074 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3075 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3076 jint ret = JNI_ERR;
3077 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3078
3079 // Don't do anything with a null object
3080 if (jobj == NULL) {
3081 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3082 }
3083
3084 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3085 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3086
3087 ret = JNI_OK;
3088 return ret;
3089 JNI_END
3090
3091 //
3092 // Extensions
3093 //
3094
3095 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3096 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3097
3098 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3099 JNIWrapper("GetStringRegion");
3100 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3101 DT_VOID_RETURN_MARK(GetStringRegion);
3102 oop s = JNIHandles::resolve_non_null(string);
3103 int s_len = java_lang_String::length(s);
3104 if (start < 0 || len < 0 || start > s_len - len) {
3105 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3106 } else {
3107 if (len > 0) {
3108 typeArrayOop s_value = java_lang_String::value(s);
3109 bool is_latin1 = java_lang_String::is_latin1(s);
3110 if (!is_latin1) {
3111 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3112 } else {
3113 for (int i = 0; i < len; i++) {
3114 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3115 }
3116 }
3117 }
3118 }
3119 JNI_END
3120
3121 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3122 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3123
3124 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3125 JNIWrapper("GetStringUTFRegion");
3126 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3127 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3128 oop s = JNIHandles::resolve_non_null(string);
3129 int s_len = java_lang_String::length(s);
3130 if (start < 0 || len < 0 || start > s_len - len) {
3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132 } else {
3133 //%note jni_7
3134 if (len > 0) {
3135 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3136 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3137 // as_utf8_string null-terminates the result string
3138 } else {
3139 // JDK null-terminates the buffer even in len is zero
3140 if (buf != NULL) {
3141 buf[0] = 0;
3142 }
3143 }
3144 }
3145 JNI_END
3146
3147
3148 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3149 JNIWrapper("GetPrimitiveArrayCritical");
3150 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3151 if (isCopy != NULL) {
3152 *isCopy = JNI_FALSE;
3153 }
3154 oop a = JNIHandles::resolve_non_null(array);
3155 a = Universe::heap()->pin_object(thread, a);
3156 assert(a->is_array(), "just checking");
3157 BasicType type;
3158 if (a->is_objArray()) {
3159 type = T_OBJECT;
3160 } else {
3161 type = TypeArrayKlass::cast(a->klass())->element_type();
3162 }
3163 void* ret = arrayOop(a)->base(type);
3164 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3165 return ret;
3166 JNI_END
3167
3168
3169 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3170 JNIWrapper("ReleasePrimitiveArrayCritical");
3171 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3172 oop a = JNIHandles::resolve_non_null(array);
3173 Universe::heap()->unpin_object(thread, a);
3174 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3175 JNI_END
3176
3177
3178 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3179 JNIWrapper("GetStringCritical");
3180 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3181 oop s = JNIHandles::resolve_non_null(string);
3182 s = Universe::heap()->pin_object(thread, s);
3183 typeArrayOop s_value = java_lang_String::value(s);
3184 bool is_latin1 = java_lang_String::is_latin1(s);
3185 if (isCopy != NULL) {
3186 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3187 }
3188 jchar* ret;
3189 if (!is_latin1) {
3190 ret = (jchar*) s_value->base(T_CHAR);
3191 } else {
3192 // Inflate latin1 encoded string to UTF16
3193 int s_len = java_lang_String::length(s);
3194 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3195 /* JNI Specification states return NULL on OOM */
3196 if (ret != NULL) {
3197 for (int i = 0; i < s_len; i++) {
3198 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3199 }
3200 ret[s_len] = 0;
3201 }
3202 }
3203 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3204 return ret;
3205 JNI_END
3206
3207
3208 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3209 JNIWrapper("ReleaseStringCritical");
3210 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3211 // The str and chars arguments are ignored for UTF16 strings
3212 oop s = JNIHandles::resolve_non_null(str);
3213 bool is_latin1 = java_lang_String::is_latin1(s);
3214 if (is_latin1) {
3215 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3216 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3217 FREE_C_HEAP_ARRAY(jchar, chars);
3218 }
3219 Universe::heap()->unpin_object(thread, s);
3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3221 JNI_END
3222
3223
3224 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3225 JNIWrapper("jni_NewWeakGlobalRef");
3226 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3227 Handle ref_handle(thread, JNIHandles::resolve(ref));
3228 jweak ret = JNIHandles::make_weak_global(ref_handle);
3229 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3230 return ret;
3231 JNI_END
3232
3233 // Must be JNI_ENTRY (with HandleMark)
3234 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3235 JNIWrapper("jni_DeleteWeakGlobalRef");
3236 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3237 JNIHandles::destroy_weak_global(ref);
3238 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3239 JNI_END
3240
3241
3242 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3243 JNIWrapper("jni_ExceptionCheck");
3244 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3245 jni_check_async_exceptions(thread);
3246 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3247 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3248 return ret;
3249 JNI_END
3250
3251
3252 // Initialization state for three routines below relating to
3253 // java.nio.DirectBuffers
3254 static int directBufferSupportInitializeStarted = 0;
3255 static volatile int directBufferSupportInitializeEnded = 0;
3256 static volatile int directBufferSupportInitializeFailed = 0;
3257 static jclass bufferClass = NULL;
3258 static jclass directBufferClass = NULL;
3259 static jclass directByteBufferClass = NULL;
3260 static jmethodID directByteBufferConstructor = NULL;
3261 static jfieldID directBufferAddressField = NULL;
3262 static jfieldID bufferCapacityField = NULL;
3263
3264 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3265 Handle loader; // null (bootstrap) loader
3266 Handle protection_domain; // null protection domain
3267
3268 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3269 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3270
3271 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3272 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3273 }
3274 return result;
3275 }
3276
3277 // These lookups are done with the NULL (bootstrap) ClassLoader to
3278 // circumvent any security checks that would be done by jni_FindClass.
3279 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3280 {
3281 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3282 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3283 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3284 return true;
3285 }
3286 JNI_END
3287
3288
3289 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3290 if (directBufferSupportInitializeFailed) {
3291 return false;
3292 }
3293
3294 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3295 if (!lookupDirectBufferClasses(env)) {
3296 directBufferSupportInitializeFailed = 1;
3297 return false;
3298 }
3299
3300 // Make global references for these
3301 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3302 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3303 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3304
3305 // Get needed field and method IDs
3306 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3307 if (env->ExceptionCheck()) {
3308 env->ExceptionClear();
3309 directBufferSupportInitializeFailed = 1;
3310 return false;
3311 }
3312 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3313 if (env->ExceptionCheck()) {
3314 env->ExceptionClear();
3315 directBufferSupportInitializeFailed = 1;
3316 return false;
3317 }
3318 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3319 if (env->ExceptionCheck()) {
3320 env->ExceptionClear();
3321 directBufferSupportInitializeFailed = 1;
3322 return false;
3323 }
3324
3325 if ((directByteBufferConstructor == NULL) ||
3326 (directBufferAddressField == NULL) ||
3327 (bufferCapacityField == NULL)) {
3328 directBufferSupportInitializeFailed = 1;
3329 return false;
3330 }
3331
3332 directBufferSupportInitializeEnded = 1;
3333 } else {
3334 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3335 os::naked_yield();
3336 }
3337 }
3338
3339 return !directBufferSupportInitializeFailed;
3340 }
3341
3342 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3343 {
3344 // thread_from_jni_environment() will block if VM is gone.
3345 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3346
3347 JNIWrapper("jni_NewDirectByteBuffer");
3348 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3349
3350 if (!directBufferSupportInitializeEnded) {
3351 if (!initializeDirectBufferSupport(env, thread)) {
3352 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3353 return NULL;
3354 }
3355 }
3356
3357 // Being paranoid about accidental sign extension on address
3358 jlong addr = (jlong) ((uintptr_t) address);
3359 // NOTE that package-private DirectByteBuffer constructor currently
3360 // takes int capacity
3361 jint cap = (jint) capacity;
3362 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3364 return ret;
3365 }
3366
3367 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3368 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3369
3370 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3371 {
3372 // thread_from_jni_environment() will block if VM is gone.
3373 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3374
3375 JNIWrapper("jni_GetDirectBufferAddress");
3376 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3377 void* ret = NULL;
3378 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3379
3380 if (!directBufferSupportInitializeEnded) {
3381 if (!initializeDirectBufferSupport(env, thread)) {
3382 return 0;
3383 }
3384 }
3385
3386 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3387 return 0;
3388 }
3389
3390 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3391 return ret;
3392 }
3393
3394 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3395 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3396
3397 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3398 {
3399 // thread_from_jni_environment() will block if VM is gone.
3400 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3401
3402 JNIWrapper("jni_GetDirectBufferCapacity");
3403 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3404 jlong ret = -1;
3405 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3406
3407 if (!directBufferSupportInitializeEnded) {
3408 if (!initializeDirectBufferSupport(env, thread)) {
3409 ret = 0;
3410 return ret;
3411 }
3412 }
3413
3414 if (buf == NULL) {
3415 return -1;
3416 }
3417
3418 if (!env->IsInstanceOf(buf, directBufferClass)) {
3419 return -1;
3420 }
3421
3422 // NOTE that capacity is currently an int in the implementation
3423 ret = env->GetIntField(buf, bufferCapacityField);
3424 return ret;
3425 }
3426
3427
3428 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3429 JNIWrapper("GetVersion");
3430 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3431 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3432 return CurrentVersion;
3433 JNI_END
3434
3435 extern struct JavaVM_ main_vm;
3436
3437 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3438 JNIWrapper("jni_GetJavaVM");
3439 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3440 *vm = (JavaVM *)(&main_vm);
3441 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3442 return JNI_OK;
3443 JNI_END
3444
3445
3446 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3447 JNIWrapper("GetModule");
3448 return Modules::get_module(clazz, THREAD);
3449 JNI_END
3450
3451
3452 // Structure containing all jni functions
3453 struct JNINativeInterface_ jni_NativeInterface = {
3454 NULL,
3455 NULL,
3456 NULL,
3457
3458 NULL,
3459
3460 jni_GetVersion,
3461
3462 jni_DefineClass,
3463 jni_FindClass,
3464
3465 jni_FromReflectedMethod,
3466 jni_FromReflectedField,
3467
3468 jni_ToReflectedMethod,
3469
3470 jni_GetSuperclass,
3471 jni_IsAssignableFrom,
3472
3473 jni_ToReflectedField,
3474
3475 jni_Throw,
3476 jni_ThrowNew,
3477 jni_ExceptionOccurred,
3478 jni_ExceptionDescribe,
3479 jni_ExceptionClear,
3480 jni_FatalError,
3481
3482 jni_PushLocalFrame,
3483 jni_PopLocalFrame,
3484
3485 jni_NewGlobalRef,
3486 jni_DeleteGlobalRef,
3487 jni_DeleteLocalRef,
3488 jni_IsSameObject,
3489
3490 jni_NewLocalRef,
3491 jni_EnsureLocalCapacity,
3492
3493 jni_AllocObject,
3494 jni_NewObject,
3495 jni_NewObjectV,
3496 jni_NewObjectA,
3497
3498 jni_GetObjectClass,
3499 jni_IsInstanceOf,
3500
3501 jni_GetMethodID,
3502
3503 jni_CallObjectMethod,
3504 jni_CallObjectMethodV,
3505 jni_CallObjectMethodA,
3506 jni_CallBooleanMethod,
3507 jni_CallBooleanMethodV,
3508 jni_CallBooleanMethodA,
3509 jni_CallByteMethod,
3510 jni_CallByteMethodV,
3511 jni_CallByteMethodA,
3512 jni_CallCharMethod,
3513 jni_CallCharMethodV,
3514 jni_CallCharMethodA,
3515 jni_CallShortMethod,
3516 jni_CallShortMethodV,
3517 jni_CallShortMethodA,
3518 jni_CallIntMethod,
3519 jni_CallIntMethodV,
3520 jni_CallIntMethodA,
3521 jni_CallLongMethod,
3522 jni_CallLongMethodV,
3523 jni_CallLongMethodA,
3524 jni_CallFloatMethod,
3525 jni_CallFloatMethodV,
3526 jni_CallFloatMethodA,
3527 jni_CallDoubleMethod,
3528 jni_CallDoubleMethodV,
3529 jni_CallDoubleMethodA,
3530 jni_CallVoidMethod,
3531 jni_CallVoidMethodV,
3532 jni_CallVoidMethodA,
3533
3534 jni_CallNonvirtualObjectMethod,
3535 jni_CallNonvirtualObjectMethodV,
3536 jni_CallNonvirtualObjectMethodA,
3537 jni_CallNonvirtualBooleanMethod,
3538 jni_CallNonvirtualBooleanMethodV,
3539 jni_CallNonvirtualBooleanMethodA,
3540 jni_CallNonvirtualByteMethod,
3541 jni_CallNonvirtualByteMethodV,
3542 jni_CallNonvirtualByteMethodA,
3543 jni_CallNonvirtualCharMethod,
3544 jni_CallNonvirtualCharMethodV,
3545 jni_CallNonvirtualCharMethodA,
3546 jni_CallNonvirtualShortMethod,
3547 jni_CallNonvirtualShortMethodV,
3548 jni_CallNonvirtualShortMethodA,
3549 jni_CallNonvirtualIntMethod,
3550 jni_CallNonvirtualIntMethodV,
3551 jni_CallNonvirtualIntMethodA,
3552 jni_CallNonvirtualLongMethod,
3553 jni_CallNonvirtualLongMethodV,
3554 jni_CallNonvirtualLongMethodA,
3555 jni_CallNonvirtualFloatMethod,
3556 jni_CallNonvirtualFloatMethodV,
3557 jni_CallNonvirtualFloatMethodA,
3558 jni_CallNonvirtualDoubleMethod,
3559 jni_CallNonvirtualDoubleMethodV,
3560 jni_CallNonvirtualDoubleMethodA,
3561 jni_CallNonvirtualVoidMethod,
3562 jni_CallNonvirtualVoidMethodV,
3563 jni_CallNonvirtualVoidMethodA,
3564
3565 jni_GetFieldID,
3566
3567 jni_GetObjectField,
3568 jni_GetBooleanField,
3569 jni_GetByteField,
3570 jni_GetCharField,
3571 jni_GetShortField,
3572 jni_GetIntField,
3573 jni_GetLongField,
3574 jni_GetFloatField,
3575 jni_GetDoubleField,
3576
3577 jni_SetObjectField,
3578 jni_SetBooleanField,
3579 jni_SetByteField,
3580 jni_SetCharField,
3581 jni_SetShortField,
3582 jni_SetIntField,
3583 jni_SetLongField,
3584 jni_SetFloatField,
3585 jni_SetDoubleField,
3586
3587 jni_GetStaticMethodID,
3588
3589 jni_CallStaticObjectMethod,
3590 jni_CallStaticObjectMethodV,
3591 jni_CallStaticObjectMethodA,
3592 jni_CallStaticBooleanMethod,
3593 jni_CallStaticBooleanMethodV,
3594 jni_CallStaticBooleanMethodA,
3595 jni_CallStaticByteMethod,
3596 jni_CallStaticByteMethodV,
3597 jni_CallStaticByteMethodA,
3598 jni_CallStaticCharMethod,
3599 jni_CallStaticCharMethodV,
3600 jni_CallStaticCharMethodA,
3601 jni_CallStaticShortMethod,
3602 jni_CallStaticShortMethodV,
3603 jni_CallStaticShortMethodA,
3604 jni_CallStaticIntMethod,
3605 jni_CallStaticIntMethodV,
3606 jni_CallStaticIntMethodA,
3607 jni_CallStaticLongMethod,
3608 jni_CallStaticLongMethodV,
3609 jni_CallStaticLongMethodA,
3610 jni_CallStaticFloatMethod,
3611 jni_CallStaticFloatMethodV,
3612 jni_CallStaticFloatMethodA,
3613 jni_CallStaticDoubleMethod,
3614 jni_CallStaticDoubleMethodV,
3615 jni_CallStaticDoubleMethodA,
3616 jni_CallStaticVoidMethod,
3617 jni_CallStaticVoidMethodV,
3618 jni_CallStaticVoidMethodA,
3619
3620 jni_GetStaticFieldID,
3621
3622 jni_GetStaticObjectField,
3623 jni_GetStaticBooleanField,
3624 jni_GetStaticByteField,
3625 jni_GetStaticCharField,
3626 jni_GetStaticShortField,
3627 jni_GetStaticIntField,
3628 jni_GetStaticLongField,
3629 jni_GetStaticFloatField,
3630 jni_GetStaticDoubleField,
3631
3632 jni_SetStaticObjectField,
3633 jni_SetStaticBooleanField,
3634 jni_SetStaticByteField,
3635 jni_SetStaticCharField,
3636 jni_SetStaticShortField,
3637 jni_SetStaticIntField,
3638 jni_SetStaticLongField,
3639 jni_SetStaticFloatField,
3640 jni_SetStaticDoubleField,
3641
3642 jni_NewString,
3643 jni_GetStringLength,
3644 jni_GetStringChars,
3645 jni_ReleaseStringChars,
3646
3647 jni_NewStringUTF,
3648 jni_GetStringUTFLength,
3649 jni_GetStringUTFChars,
3650 jni_ReleaseStringUTFChars,
3651
3652 jni_GetArrayLength,
3653
3654 jni_NewObjectArray,
3655 jni_GetObjectArrayElement,
3656 jni_SetObjectArrayElement,
3657
3658 jni_NewBooleanArray,
3659 jni_NewByteArray,
3660 jni_NewCharArray,
3661 jni_NewShortArray,
3662 jni_NewIntArray,
3663 jni_NewLongArray,
3664 jni_NewFloatArray,
3665 jni_NewDoubleArray,
3666
3667 jni_GetBooleanArrayElements,
3668 jni_GetByteArrayElements,
3669 jni_GetCharArrayElements,
3670 jni_GetShortArrayElements,
3671 jni_GetIntArrayElements,
3672 jni_GetLongArrayElements,
3673 jni_GetFloatArrayElements,
3674 jni_GetDoubleArrayElements,
3675
3676 jni_ReleaseBooleanArrayElements,
3677 jni_ReleaseByteArrayElements,
3678 jni_ReleaseCharArrayElements,
3679 jni_ReleaseShortArrayElements,
3680 jni_ReleaseIntArrayElements,
3681 jni_ReleaseLongArrayElements,
3682 jni_ReleaseFloatArrayElements,
3683 jni_ReleaseDoubleArrayElements,
3684
3685 jni_GetBooleanArrayRegion,
3686 jni_GetByteArrayRegion,
3687 jni_GetCharArrayRegion,
3688 jni_GetShortArrayRegion,
3689 jni_GetIntArrayRegion,
3690 jni_GetLongArrayRegion,
3691 jni_GetFloatArrayRegion,
3692 jni_GetDoubleArrayRegion,
3693
3694 jni_SetBooleanArrayRegion,
3695 jni_SetByteArrayRegion,
3696 jni_SetCharArrayRegion,
3697 jni_SetShortArrayRegion,
3698 jni_SetIntArrayRegion,
3699 jni_SetLongArrayRegion,
3700 jni_SetFloatArrayRegion,
3701 jni_SetDoubleArrayRegion,
3702
3703 jni_RegisterNatives,
3704 jni_UnregisterNatives,
3705
3706 jni_MonitorEnter,
3707 jni_MonitorExit,
3708
3709 jni_GetJavaVM,
3710
3711 jni_GetStringRegion,
3712 jni_GetStringUTFRegion,
3713
3714 jni_GetPrimitiveArrayCritical,
3715 jni_ReleasePrimitiveArrayCritical,
3716
3717 jni_GetStringCritical,
3718 jni_ReleaseStringCritical,
3719
3720 jni_NewWeakGlobalRef,
3721 jni_DeleteWeakGlobalRef,
3722
3723 jni_ExceptionCheck,
3724
3725 jni_NewDirectByteBuffer,
3726 jni_GetDirectBufferAddress,
3727 jni_GetDirectBufferCapacity,
3728
3729 // New 1_6 features
3730
3731 jni_GetObjectRefType,
3732
3733 // Module features
3734
3735 jni_GetModule
3736 };
3737
3738
3739 // For jvmti use to modify jni function table.
3740 // Java threads in native contiues to run until it is transitioned
3741 // to VM at safepoint. Before the transition or before it is blocked
3742 // for safepoint it may access jni function table. VM could crash if
3743 // any java thread access the jni function table in the middle of memcpy.
3744 // To avoid this each function pointers are copied automically.
3745 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3746 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3747 intptr_t *a = (intptr_t *) jni_functions();
3748 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3749 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3750 Atomic::store(*b++, a++);
3751 }
3752 }
3753
3754 void quicken_jni_functions() {
3755 // Replace Get<Primitive>Field with fast versions
3756 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3757 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3758 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3759 // windows x86 currently needs SEH wrapper and the gain of the fast
3760 // versions currently isn't certain for server vm on uniprocessor.
3761 && os::is_MP()
3762 #endif
3763 ) {
3764 address func;
3765 func = JNI_FastGetField::generate_fast_get_boolean_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_byte_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_char_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_short_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3780 }
3781 func = JNI_FastGetField::generate_fast_get_int_field();
3782 if (func != (address)-1) {
3783 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3784 }
3785 func = JNI_FastGetField::generate_fast_get_long_field();
3786 if (func != (address)-1) {
3787 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3788 }
3789 func = JNI_FastGetField::generate_fast_get_float_field();
3790 if (func != (address)-1) {
3791 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3792 }
3793 func = JNI_FastGetField::generate_fast_get_double_field();
3794 if (func != (address)-1) {
3795 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3796 }
3797 }
3798 }
3799
3800 // Returns the function structure
3801 struct JNINativeInterface_* jni_functions() {
3802 #if INCLUDE_JNI_CHECK
3803 if (CheckJNICalls) return jni_functions_check();
3804 #endif // INCLUDE_JNI_CHECK
3805 return &jni_NativeInterface;
3806 }
3807
3808 // Returns the function structure
3809 struct JNINativeInterface_* jni_functions_nocheck() {
3810 return &jni_NativeInterface;
3811 }
3812
3813
3814 // Invocation API
3815
3816
3817 // Forward declaration
3818 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3819
3820 // Global invocation API vars
3821 volatile int vm_created = 0;
3822 // Indicate whether it is safe to recreate VM
3823 volatile int safe_to_recreate_vm = 1;
3824 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3825
3826
3827 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3828 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3829
3830 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3831 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3832
3833 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3834 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3835 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3836 jint ret = JNI_ERR;
3837 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3838
3839 if (Threads::is_supported_jni_version(args->version)) {
3840 ret = JNI_OK;
3841 }
3842 // 1.1 style no longer supported in hotspot.
3843 // According the JNI spec, we should update args->version on return.
3844 // We also use the structure to communicate with launcher about default
3845 // stack size.
3846 if (args->version == JNI_VERSION_1_1) {
3847 args->version = JNI_VERSION_1_2;
3848 // javaStackSize is int in arguments structure
3849 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3850 args->javaStackSize = (jint)(ThreadStackSize * K);
3851 }
3852 return ret;
3853 }
3854
3855 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3856 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3857
3858 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3859 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3860
3861 jint result = JNI_ERR;
3862 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3863
3864 // We're about to use Atomic::xchg for synchronization. Some Zero
3865 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3866 // but __sync_lock_test_and_set is not guaranteed to do what we want
3867 // on all architectures. So we check it works before relying on it.
3868 #if defined(ZERO) && defined(ASSERT)
3869 {
3870 jint a = 0xcafebabe;
3871 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3872 void *c = &a;
3873 void *d = Atomic::xchg(&b, &c);
3874 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3875 assert(c == &b && d == &a, "Atomic::xchg() works");
3876 }
3877 #endif // ZERO && ASSERT
3878
3879 // At the moment it's only possible to have one Java VM,
3880 // since some of the runtime state is in global variables.
3881
3882 // We cannot use our mutex locks here, since they only work on
3883 // Threads. We do an atomic compare and exchange to ensure only
3884 // one thread can call this method at a time
3885
3886 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3887 // the add/dec implementations are dependent on whether we are running
3888 // on a multiprocessor, and at this stage of initialization the os::is_MP
3889 // function used to determine this will always return false. Atomic::xchg
3890 // does not have this problem.
3891 if (Atomic::xchg(1, &vm_created) == 1) {
3892 return JNI_EEXIST; // already created, or create attempt in progress
3893 }
3894 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3895 return JNI_ERR; // someone tried and failed and retry not allowed.
3896 }
3897
3898 assert(vm_created == 1, "vm_created is true during the creation");
3899
3900 /**
3901 * Certain errors during initialization are recoverable and do not
3902 * prevent this method from being called again at a later time
3903 * (perhaps with different arguments). However, at a certain
3904 * point during initialization if an error occurs we cannot allow
3905 * this function to be called again (or it will crash). In those
3906 * situations, the 'canTryAgain' flag is set to false, which atomically
3907 * sets safe_to_recreate_vm to 1, such that any new call to
3908 * JNI_CreateJavaVM will immediately fail using the above logic.
3909 */
3910 bool can_try_again = true;
3911
3912 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3913 if (result == JNI_OK) {
3914 JavaThread *thread = JavaThread::current();
3915 assert(!thread->has_pending_exception(), "should have returned not OK");
3916 /* thread is thread_in_vm here */
3917 *vm = (JavaVM *)(&main_vm);
3918 *(JNIEnv**)penv = thread->jni_environment();
3919
3920 #if INCLUDE_JVMCI
3921 if (EnableJVMCI) {
3922 if (UseJVMCICompiler) {
3923 // JVMCI is initialized on a CompilerThread
3924 if (BootstrapJVMCI) {
3925 JavaThread* THREAD = thread;
3926 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3927 compiler->bootstrap(THREAD);
3928 if (HAS_PENDING_EXCEPTION) {
3929 HandleMark hm;
3930 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3931 }
3932 }
3933 }
3934 }
3935 #endif
3936
3937 // Tracks the time application was running before GC
3938 RuntimeService::record_application_start();
3939
3940 // Notify JVMTI
3941 if (JvmtiExport::should_post_thread_life()) {
3942 JvmtiExport::post_thread_start(thread);
3943 }
3944
3945 EventThreadStart event;
3946 if (event.should_commit()) {
3947 event.set_thread(THREAD_TRACE_ID(thread));
3948 event.commit();
3949 }
3950
3951 #ifndef PRODUCT
3952 // Check if we should compile all classes on bootclasspath
3953 if (CompileTheWorld) ClassLoader::compile_the_world();
3954 if (ReplayCompiles) ciReplay::replay(thread);
3955
3956 // Some platforms (like Win*) need a wrapper around these test
3957 // functions in order to properly handle error conditions.
3958 VMError::test_error_handler();
3959 if (ExecuteInternalVMTests) {
3960 InternalVMTests::run();
3961 }
3962 #endif
3963
3964 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3965 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3966 } else {
3967 // If create_vm exits because of a pending exception, exit with that
3968 // exception. In the future when we figure out how to reclaim memory,
3969 // we may be able to exit with JNI_ERR and allow the calling application
3970 // to continue.
3971 if (Universe::is_fully_initialized()) {
3972 // otherwise no pending exception possible - VM will already have aborted
3973 JavaThread* THREAD = JavaThread::current();
3974 if (HAS_PENDING_EXCEPTION) {
3975 HandleMark hm;
3976 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3977 }
3978 }
3979
3980 if (can_try_again) {
3981 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3982 safe_to_recreate_vm = 1;
3983 }
3984
3985 // Creation failed. We must reset vm_created
3986 *vm = 0;
3987 *(JNIEnv**)penv = 0;
3988 // reset vm_created last to avoid race condition. Use OrderAccess to
3989 // control both compiler and architectural-based reordering.
3990 OrderAccess::release_store(&vm_created, 0);
3991 }
3992
3993 // Flush stdout and stderr before exit.
3994 fflush(stdout);
3995 fflush(stderr);
3996
3997 return result;
3998
3999 }
4000
4001 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4002 jint result = JNI_ERR;
4003 // On Windows, let CreateJavaVM run with SEH protection
4004 #ifdef _WIN32
4005 __try {
4006 #endif
4007 result = JNI_CreateJavaVM_inner(vm, penv, args);
4008 #ifdef _WIN32
4009 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4010 // Nothing to do.
4011 }
4012 #endif
4013 return result;
4014 }
4015
4016 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4017 // See bug 4367188, the wrapper can sometimes cause VM crashes
4018 // JNIWrapper("GetCreatedJavaVMs");
4019
4020 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4021
4022 if (vm_created == 1) {
4023 if (numVMs != NULL) *numVMs = 1;
4024 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4025 } else {
4026 if (numVMs != NULL) *numVMs = 0;
4027 }
4028 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4029 return JNI_OK;
4030 }
4031
4032 extern "C" {
4033
4034 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4035 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4036
4037 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4038 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4039 jint res = JNI_ERR;
4040 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4041
4042 if (vm_created == 0) {
4043 res = JNI_ERR;
4044 return res;
4045 }
4046
4047 JNIWrapper("DestroyJavaVM");
4048 JNIEnv *env;
4049 JavaVMAttachArgs destroyargs;
4050 destroyargs.version = CurrentVersion;
4051 destroyargs.name = (char *)"DestroyJavaVM";
4052 destroyargs.group = NULL;
4053 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4054 if (res != JNI_OK) {
4055 return res;
4056 }
4057
4058 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4059 JavaThread* thread = JavaThread::current();
4060 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4061 if (Threads::destroy_vm()) {
4062 // Should not change thread state, VM is gone
4063 vm_created = 0;
4064 res = JNI_OK;
4065 return res;
4066 } else {
4067 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4068 res = JNI_ERR;
4069 return res;
4070 }
4071 }
4072
4073 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4074 jint result = JNI_ERR;
4075 // On Windows, we need SEH protection
4076 #ifdef _WIN32
4077 __try {
4078 #endif
4079 result = jni_DestroyJavaVM_inner(vm);
4080 #ifdef _WIN32
4081 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4082 // Nothing to do.
4083 }
4084 #endif
4085 return result;
4086 }
4087
4088 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4089 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4090
4091 // Check below commented out from JDK1.2fcs as well
4092 /*
4093 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4094 return JNI_EVERSION;
4095 }
4096 */
4097
4098 Thread* t = Thread::current_or_null();
4099 if (t != NULL) {
4100 // If the thread has been attached this operation is a no-op
4101 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4102 return JNI_OK;
4103 }
4104
4105 // Create a thread and mark it as attaching so it will be skipped by the
4106 // ThreadsListEnumerator - see CR 6404306
4107 JavaThread* thread = new JavaThread(true);
4108
4109 // Set correct safepoint info. The thread is going to call into Java when
4110 // initializing the Java level thread object. Hence, the correct state must
4111 // be set in order for the Safepoint code to deal with it correctly.
4112 thread->set_thread_state(_thread_in_vm);
4113 thread->record_stack_base_and_size();
4114 thread->initialize_thread_current();
4115
4116 if (!os::create_attached_thread(thread)) {
4117 thread->smr_delete();
4118 return JNI_ERR;
4119 }
4120 // Enable stack overflow checks
4121 thread->create_stack_guard_pages();
4122
4123 thread->initialize_tlab();
4124
4125 thread->cache_global_variables();
4126
4127 // Crucial that we do not have a safepoint check for this thread, since it has
4128 // not been added to the Thread list yet.
4129 { Threads_lock->lock_without_safepoint_check();
4130 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4131 // avoid this thread trying to do a GC before it is added to the thread-list
4132 thread->set_active_handles(JNIHandleBlock::allocate_block());
4133 Threads::add(thread, daemon);
4134 Threads_lock->unlock();
4135 }
4136 // Create thread group and name info from attach arguments
4137 oop group = NULL;
4138 char* thread_name = NULL;
4139 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4140 group = JNIHandles::resolve(args->group);
4141 thread_name = args->name; // may be NULL
4142 }
4143 if (group == NULL) group = Universe::main_thread_group();
4144
4145 // Create Java level thread object and attach it to this thread
4146 bool attach_failed = false;
4147 {
4148 EXCEPTION_MARK;
4149 HandleMark hm(THREAD);
4150 Handle thread_group(THREAD, group);
4151 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4152 if (HAS_PENDING_EXCEPTION) {
4153 CLEAR_PENDING_EXCEPTION;
4154 // cleanup outside the handle mark.
4155 attach_failed = true;
4156 }
4157 }
4158
4159 if (attach_failed) {
4160 // Added missing cleanup
4161 thread->cleanup_failed_attach_current_thread();
4162 return JNI_ERR;
4163 }
4164
4165 // mark the thread as no longer attaching
4166 // this uses a fence to push the change through so we don't have
4167 // to regrab the threads_lock
4168 thread->set_done_attaching_via_jni();
4169
4170 // Set java thread status.
4171 java_lang_Thread::set_thread_status(thread->threadObj(),
4172 java_lang_Thread::RUNNABLE);
4173
4174 // Notify the debugger
4175 if (JvmtiExport::should_post_thread_life()) {
4176 JvmtiExport::post_thread_start(thread);
4177 }
4178
4179 EventThreadStart event;
4180 if (event.should_commit()) {
4181 event.set_thread(THREAD_TRACE_ID(thread));
4182 event.commit();
4183 }
4184
4185 *(JNIEnv**)penv = thread->jni_environment();
4186
4187 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4188 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4189 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4190 // needed.
4191
4192 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4193
4194 // Perform any platform dependent FPU setup
4195 os::setup_fpu();
4196
4197 return JNI_OK;
4198 }
4199
4200
4201 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4202 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4203 if (vm_created == 0) {
4204 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4205 return JNI_ERR;
4206 }
4207
4208 JNIWrapper("AttachCurrentThread");
4209 jint ret = attach_current_thread(vm, penv, _args, false);
4210 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4211 return ret;
4212 }
4213
4214
4215 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4216 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4217
4218 JNIWrapper("DetachCurrentThread");
4219
4220 // If the thread has already been detached the operation is a no-op
4221 if (Thread::current_or_null() == NULL) {
4222 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4223 return JNI_OK;
4224 }
4225
4226 VM_Exit::block_if_vm_exited();
4227
4228 JavaThread* thread = JavaThread::current();
4229 if (thread->has_last_Java_frame()) {
4230 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4231 // Can't detach a thread that's running java, that can't work.
4232 return JNI_ERR;
4233 }
4234
4235 // Safepoint support. Have to do call-back to safepoint code, if in the
4236 // middle of a safepoint operation
4237 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4238
4239 // XXX: Note that JavaThread::exit() call below removes the guards on the
4240 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4241 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4242 // of the guards is visible in jni_AttachCurrentThread above,
4243 // the removal of the guards is buried below in JavaThread::exit()
4244 // here. The abstraction should be more symmetrically either exposed
4245 // or hidden (e.g. it could probably be hidden in the same
4246 // (platform-dependent) methods where we do alternate stack
4247 // maintenance work?)
4248 thread->exit(false, JavaThread::jni_detach);
4249 thread->smr_delete();
4250
4251 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4252 return JNI_OK;
4253 }
4254
4255 DT_RETURN_MARK_DECL(GetEnv, jint
4256 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4257
4258 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4259 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4260 jint ret = JNI_ERR;
4261 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4262
4263 if (vm_created == 0) {
4264 *penv = NULL;
4265 ret = JNI_EDETACHED;
4266 return ret;
4267 }
4268
4269 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4270 return ret;
4271 }
4272
4273 #ifndef JVMPI_VERSION_1
4274 // need these in order to be polite about older agents
4275 #define JVMPI_VERSION_1 ((jint)0x10000001)
4276 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4277 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4278 #endif // !JVMPI_VERSION_1
4279
4280 Thread* thread = Thread::current_or_null();
4281 if (thread != NULL && thread->is_Java_thread()) {
4282 if (Threads::is_supported_jni_version_including_1_1(version)) {
4283 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4284 ret = JNI_OK;
4285 return ret;
4286
4287 } else if (version == JVMPI_VERSION_1 ||
4288 version == JVMPI_VERSION_1_1 ||
4289 version == JVMPI_VERSION_1_2) {
4290 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4291 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4292 ret = JNI_EVERSION;
4293 return ret;
4294 } else if (JvmtiExport::is_jvmdi_version(version)) {
4295 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4296 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4297 ret = JNI_EVERSION;
4298 return ret;
4299 } else {
4300 *penv = NULL;
4301 ret = JNI_EVERSION;
4302 return ret;
4303 }
4304 } else {
4305 *penv = NULL;
4306 ret = JNI_EDETACHED;
4307 return ret;
4308 }
4309 }
4310
4311
4312 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4313 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4314 if (vm_created == 0) {
4315 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4316 return JNI_ERR;
4317 }
4318
4319 JNIWrapper("AttachCurrentThreadAsDaemon");
4320 jint ret = attach_current_thread(vm, penv, _args, true);
4321 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4322 return ret;
4323 }
4324
4325
4326 } // End extern "C"
4327
4328 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4329 NULL,
4330 NULL,
4331 NULL,
4332
4333 jni_DestroyJavaVM,
4334 jni_AttachCurrentThread,
4335 jni_DetachCurrentThread,
4336 jni_GetEnv,
4337 jni_AttachCurrentThreadAsDaemon
4338 };