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 "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "memory/allocation.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/access.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.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.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/orderAccess.inline.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/vm_operations.hpp"
77 #include "services/memTracker.hpp"
78 #include "services/runtimeService.hpp"
79 #include "trace/traceMacros.hpp"
80 #include "trace/tracing.hpp"
81 #include "utilities/defaultStream.hpp"
82 #include "utilities/dtrace.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/histogram.hpp"
85 #include "utilities/internalVMTests.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/vmError.hpp"
88 #if INCLUDE_JVMCI
89 #include "jvmci/jvmciCompiler.hpp"
90 #include "jvmci/jvmciRuntime.hpp"
91 #endif
92
93 static jint CurrentVersion = JNI_VERSION_10;
94
95 #ifdef _WIN32
96 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
97 #endif
98
99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
100 // '-return' probe regardless of the return path is taken out of the function.
101 // Methods that have multiple return paths use this to avoid having to
102 // instrument each return path. Methods that use CHECK or THROW must use this
103 // since those macros can cause an immedate uninstrumented return.
104 //
105 // In order to get the return value, a reference to the variable containing
106 // the return value must be passed to the contructor of the object, and
107 // the return value must be set before return (since the mark object has
108 // a reference to it).
109 //
110 // Example:
111 // DT_RETURN_MARK_DECL(SomeFunc, int);
112 // JNI_ENTRY(int, SomeFunc, ...)
113 // int return_value = 0;
114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
115 // foo(CHECK_0)
116 // return_value = 5;
117 // return return_value;
118 // JNI_END
119 #define DT_RETURN_MARK_DECL(name, type, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 const type& _ret_ref; \
124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
125 ~DTraceReturnProbeMark_##name() { \
126 probe; \
127 } \
128 } \
129 )
130 // Void functions are simpler since there's no return value
131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140
141 // Place these macros in the function to mark the return. Non-void
142 // functions need the type and address of the return value.
143 #define DT_RETURN_MARK(name, type, ref) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
145 #define DT_VOID_RETURN_MARK(name) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
147
148
149 // Use these to select distinct code for floating-point vs. non-floating point
150 // situations. Used from within common macros where we need slightly
151 // different behavior for Float/Double
152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
153 #define FP_SELECT_Byte(intcode, fpcode) intcode
154 #define FP_SELECT_Char(intcode, fpcode) intcode
155 #define FP_SELECT_Short(intcode, fpcode) intcode
156 #define FP_SELECT_Object(intcode, fpcode) intcode
157 #define FP_SELECT_Int(intcode, fpcode) intcode
158 #define FP_SELECT_Long(intcode, fpcode) intcode
159 #define FP_SELECT_Float(intcode, fpcode) fpcode
160 #define FP_SELECT_Double(intcode, fpcode) fpcode
161 #define FP_SELECT(TypeName, intcode, fpcode) \
162 FP_SELECT_##TypeName(intcode, fpcode)
163
164 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
165 // (dtrace doesn't do FP yet)
166 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
167 FP_SELECT(TypeName, \
168 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
169 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
172
173
174 // out-of-line helpers for class jfieldIDWorkaround:
175
176 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
177 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
178 uintptr_t as_uint = (uintptr_t) id;
179 intptr_t offset = raw_instance_offset(id);
180 if (is_checked_jfieldID(id)) {
181 if (!klass_hash_ok(k, id)) {
182 return false;
183 }
184 }
185 return InstanceKlass::cast(k)->contains_field_offset(offset);
186 } else {
187 JNIid* result = (JNIid*) id;
188 #ifdef ASSERT
189 return result != NULL && result->is_static_field_id();
190 #else
191 return result != NULL;
192 #endif
193 }
194 }
195
196
197 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
198 if (offset <= small_offset_mask) {
199 Klass* field_klass = k;
200 Klass* super_klass = field_klass->super();
201 // With compressed oops the most super class with nonstatic fields would
202 // be the owner of fields embedded in the header.
203 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
204 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
205 field_klass = super_klass; // super contains the field also
206 super_klass = field_klass->super();
207 }
208 debug_only(NoSafepointVerifier nosafepoint;)
209 uintptr_t klass_hash = field_klass->identity_hash();
210 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
211 } else {
212 #if 0
213 #ifndef PRODUCT
214 {
215 ResourceMark rm;
216 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
217 }
218 #endif
219 #endif
220 return 0;
221 }
222 }
223
224 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
225 uintptr_t as_uint = (uintptr_t) id;
226 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
227 do {
228 debug_only(NoSafepointVerifier nosafepoint;)
229 // Could use a non-blocking query for identity_hash here...
230 if ((k->identity_hash() & klass_mask) == klass_hash)
231 return true;
232 k = k->super();
233 } while (k != NULL);
234 return false;
235 }
236
237 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
238 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
239 uintptr_t as_uint = (uintptr_t) id;
240 intptr_t offset = raw_instance_offset(id);
241 if (VerifyJNIFields) {
242 if (is_checked_jfieldID(id)) {
243 guarantee(klass_hash_ok(k, id),
244 "Bug in native code: jfieldID class must match object");
245 } else {
246 #if 0
247 #ifndef PRODUCT
248 if (Verbose) {
249 ResourceMark rm;
250 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
251 }
252 #endif
253 #endif
254 }
255 }
256 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
257 "Bug in native code: jfieldID offset must address interior of object");
258 }
259
260 // Wrapper to trace JNI functions
261
262 #ifdef ASSERT
263 Histogram* JNIHistogram;
264 static volatile int JNIHistogram_lock = 0;
265
266 class JNIHistogramElement : public HistogramElement {
267 public:
268 JNIHistogramElement(const char* name);
269 };
270
271 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
272 _name = elementName;
273 uintx count = 0;
274
275 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
276 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
277 count +=1;
278 if ( (WarnOnStalledSpinLock > 0)
279 && (count % WarnOnStalledSpinLock == 0)) {
280 warning("JNIHistogram_lock seems to be stalled");
281 }
282 }
283 }
284
285
286 if(JNIHistogram == NULL)
287 JNIHistogram = new Histogram("JNI Call Counts",100);
288
289 JNIHistogram->add_element(this);
290 Atomic::dec(&JNIHistogram_lock);
291 }
292
293 #define JNICountWrapper(arg) \
294 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
295 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
296 if (e != NULL) e->increment_count()
297 #define JNIWrapper(arg) JNICountWrapper(arg);
298 #else
299 #define JNIWrapper(arg)
300 #endif
301
302
303 // Implementation of JNI entries
304
305 DT_RETURN_MARK_DECL(DefineClass, jclass
306 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
307
308 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
309 const jbyte *buf, jsize bufLen))
310 JNIWrapper("DefineClass");
311
312 HOTSPOT_JNI_DEFINECLASS_ENTRY(
313 env, (char*) name, loaderRef, (char*) buf, bufLen);
314
315 jclass cls = NULL;
316 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
317
318 TempNewSymbol class_name = NULL;
319 // Since exceptions can be thrown, class initialization can take place
320 // if name is NULL no check for class name in .class stream has to be made.
321 if (name != NULL) {
322 const int str_len = (int)strlen(name);
323 if (str_len > Symbol::max_length()) {
324 // It's impossible to create this class; the name cannot fit
325 // into the constant pool.
326 Exceptions::fthrow(THREAD_AND_LOCATION,
327 vmSymbols::java_lang_NoClassDefFoundError(),
328 "Class name exceeds maximum length of %d: %s",
329 Symbol::max_length(),
330 name);
331 return 0;
332 }
333 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
334 }
335 ResourceMark rm(THREAD);
336 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
337 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
338
339 if (UsePerfData && !class_loader.is_null()) {
340 // check whether the current caller thread holds the lock or not.
341 // If not, increment the corresponding counter
342 if (ObjectSynchronizer::
343 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
344 ObjectSynchronizer::owner_self) {
345 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
346 }
347 }
348 Klass* k = SystemDictionary::resolve_from_stream(class_name,
349 class_loader,
350 Handle(),
351 &st,
352 CHECK_NULL);
353
354 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
355 trace_class_resolution(k);
356 }
357
358 cls = (jclass)JNIHandles::make_local(
359 env, k->java_mirror());
360 return cls;
361 JNI_END
362
363
364
365 static bool first_time_FindClass = true;
366
367 DT_RETURN_MARK_DECL(FindClass, jclass
368 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
369
370 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
371 JNIWrapper("FindClass");
372
373 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
374
375 jclass result = NULL;
376 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
377
378 // Remember if we are the first invocation of jni_FindClass
379 bool first_time = first_time_FindClass;
380 first_time_FindClass = false;
381
382 // Sanity check the name: it cannot be null or larger than the maximum size
383 // name we can fit in the constant pool.
384 if (name == NULL) {
385 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
386 }
387 if ((int)strlen(name) > Symbol::max_length()) {
388 Exceptions::fthrow(THREAD_AND_LOCATION,
389 vmSymbols::java_lang_NoClassDefFoundError(),
390 "Class name exceeds maximum length of %d: %s",
391 Symbol::max_length(),
392 name);
393 return 0;
394 }
395
396 //%note jni_3
397 Handle protection_domain;
398 // Find calling class
399 Klass* k = thread->security_get_caller_class(0);
400 // default to the system loader when no context
401 Handle loader(THREAD, SystemDictionary::java_system_loader());
402 if (k != NULL) {
403 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
404 // in the correct class context.
405 if (k->class_loader() == NULL &&
406 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
407 JavaValue result(T_OBJECT);
408 JavaCalls::call_static(&result, k,
409 vmSymbols::getFromClass_name(),
410 vmSymbols::void_class_signature(),
411 CHECK_NULL);
412 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
413 // a non-NULL Class object. When invoked from JNI_OnUnload,
414 // it will return NULL to indicate no context.
415 oop mirror = (oop) result.get_jobject();
416 if (mirror != NULL) {
417 Klass* fromClass = java_lang_Class::as_Klass(mirror);
418 loader = Handle(THREAD, fromClass->class_loader());
419 protection_domain = Handle(THREAD, fromClass->protection_domain());
420 }
421 } else {
422 loader = Handle(THREAD, k->class_loader());
423 }
424 }
425
426 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
427 result = find_class_from_class_loader(env, sym, true, loader,
428 protection_domain, true, thread);
429
430 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
431 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
432 }
433
434 // If we were the first invocation of jni_FindClass, we enable compilation again
435 // rather than just allowing invocation counter to overflow and decay.
436 // Controlled by flag DelayCompilationDuringStartup.
437 if (first_time && !CompileTheWorld)
438 CompilationPolicy::completed_vm_startup();
439
440 return result;
441 JNI_END
442
443 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
444 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
445
446 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
447 JNIWrapper("FromReflectedMethod");
448
449 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
450
451 jmethodID ret = NULL;
452 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
453
454 // method is a handle to a java.lang.reflect.Method object
455 oop reflected = JNIHandles::resolve_non_null(method);
456 oop mirror = NULL;
457 int slot = 0;
458
459 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
460 mirror = java_lang_reflect_Constructor::clazz(reflected);
461 slot = java_lang_reflect_Constructor::slot(reflected);
462 } else {
463 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
464 mirror = java_lang_reflect_Method::clazz(reflected);
465 slot = java_lang_reflect_Method::slot(reflected);
466 }
467 Klass* k1 = java_lang_Class::as_Klass(mirror);
468
469 // Make sure class is initialized before handing id's out to methods
470 k1->initialize(CHECK_NULL);
471 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
472 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
473 return ret;
474 JNI_END
475
476 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
477 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
478
479 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
480 JNIWrapper("FromReflectedField");
481
482 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
483
484 jfieldID ret = NULL;
485 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
486
487 // field is a handle to a java.lang.reflect.Field object
488 oop reflected = JNIHandles::resolve_non_null(field);
489 oop mirror = java_lang_reflect_Field::clazz(reflected);
490 Klass* k1 = java_lang_Class::as_Klass(mirror);
491 int slot = java_lang_reflect_Field::slot(reflected);
492 int modifiers = java_lang_reflect_Field::modifiers(reflected);
493
494 // Make sure class is initialized before handing id's out to fields
495 k1->initialize(CHECK_NULL);
496
497 // First check if this is a static field
498 if (modifiers & JVM_ACC_STATIC) {
499 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
500 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
501 assert(id != NULL, "corrupt Field object");
502 debug_only(id->set_is_static_field_id();)
503 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
504 ret = jfieldIDWorkaround::to_static_jfieldID(id);
505 return ret;
506 }
507
508 // The slot is the index of the field description in the field-array
509 // The jfieldID is the offset of the field within the object
510 // It may also have hash bits for k, if VerifyJNIFields is turned on.
511 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
512 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
513 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
514 return ret;
515 JNI_END
516
517
518 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
519 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
520
521 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
522 JNIWrapper("ToReflectedMethod");
523
524 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
525
526 jobject ret = NULL;
527 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
528
529 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
530 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
531 oop reflection_method;
532 if (m->is_initializer()) {
533 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
534 } else {
535 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
536 }
537 ret = JNIHandles::make_local(env, reflection_method);
538 return ret;
539 JNI_END
540
541 DT_RETURN_MARK_DECL(GetSuperclass, jclass
542 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
543
544 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
545 JNIWrapper("GetSuperclass");
546
547 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
548
549 jclass obj = NULL;
550 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
551
552 oop mirror = JNIHandles::resolve_non_null(sub);
553 // primitive classes return NULL
554 if (java_lang_Class::is_primitive(mirror)) return NULL;
555
556 // Rules of Class.getSuperClass as implemented by KLass::java_super:
557 // arrays return Object
558 // interfaces return NULL
559 // proper classes return Klass::super()
560 Klass* k = java_lang_Class::as_Klass(mirror);
561 if (k->is_interface()) return NULL;
562
563 // return mirror for superclass
564 Klass* super = k->java_super();
565 // super2 is the value computed by the compiler's getSuperClass intrinsic:
566 debug_only(Klass* super2 = ( k->is_array_klass()
567 ? SystemDictionary::Object_klass()
568 : k->super() ) );
569 assert(super == super2,
570 "java_super computation depends on interface, array, other super");
571 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
572 return obj;
573 JNI_END
574
575 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
576 JNIWrapper("IsSubclassOf");
577
578 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
579
580 oop sub_mirror = JNIHandles::resolve_non_null(sub);
581 oop super_mirror = JNIHandles::resolve_non_null(super);
582 if (java_lang_Class::is_primitive(sub_mirror) ||
583 java_lang_Class::is_primitive(super_mirror)) {
584 jboolean ret = (sub_mirror == super_mirror);
585
586 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
587 return ret;
588 }
589 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
590 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
591 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
592 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
593 JNI_TRUE : JNI_FALSE;
594
595 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
596 return ret;
597 JNI_END
598
599
600 DT_RETURN_MARK_DECL(Throw, jint
601 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
602
603 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
604 JNIWrapper("Throw");
605
606 HOTSPOT_JNI_THROW_ENTRY(env, obj);
607
608 jint ret = JNI_OK;
609 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
610
611 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
612 ShouldNotReachHere();
613 return 0; // Mute compiler.
614 JNI_END
615
616
617 DT_RETURN_MARK_DECL(ThrowNew, jint
618 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
619
620 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
621 JNIWrapper("ThrowNew");
622
623 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
624
625 jint ret = JNI_OK;
626 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
627
628 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
629 Symbol* name = k->name();
630 Handle class_loader (THREAD, k->class_loader());
631 Handle protection_domain (THREAD, k->protection_domain());
632 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
633 ShouldNotReachHere();
634 return 0; // Mute compiler.
635 JNI_END
636
637
638 // JNI functions only transform a pending async exception to a synchronous
639 // exception in ExceptionOccurred and ExceptionCheck calls, since
640 // delivering an async exception in other places won't change the native
641 // code's control flow and would be harmful when native code further calls
642 // JNI functions with a pending exception. Async exception is also checked
643 // during the call, so ExceptionOccurred/ExceptionCheck won't return
644 // false but deliver the async exception at the very end during
645 // state transition.
646
647 static void jni_check_async_exceptions(JavaThread *thread) {
648 assert(thread == Thread::current(), "must be itself");
649 thread->check_and_handle_async_exceptions();
650 }
651
652 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
653 JNIWrapper("ExceptionOccurred");
654
655 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
656
657 jni_check_async_exceptions(thread);
658 oop exception = thread->pending_exception();
659 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
660
661 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
662 return ret;
663 JNI_END
664
665
666 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
667 JNIWrapper("ExceptionDescribe");
668
669 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
670
671 if (thread->has_pending_exception()) {
672 Handle ex(thread, thread->pending_exception());
673 thread->clear_pending_exception();
674 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
675 // Don't print anything if we are being killed.
676 } else {
677 jio_fprintf(defaultStream::error_stream(), "Exception ");
678 if (thread != NULL && thread->threadObj() != NULL) {
679 ResourceMark rm(THREAD);
680 jio_fprintf(defaultStream::error_stream(),
681 "in thread \"%s\" ", thread->get_thread_name());
682 }
683 if (ex->is_a(SystemDictionary::Throwable_klass())) {
684 JavaValue result(T_VOID);
685 JavaCalls::call_virtual(&result,
686 ex,
687 SystemDictionary::Throwable_klass(),
688 vmSymbols::printStackTrace_name(),
689 vmSymbols::void_method_signature(),
690 THREAD);
691 // If an exception is thrown in the call it gets thrown away. Not much
692 // we can do with it. The native code that calls this, does not check
693 // for the exception - hence, it might still be in the thread when DestroyVM gets
694 // called, potentially causing a few asserts to trigger - since no pending exception
695 // is expected.
696 CLEAR_PENDING_EXCEPTION;
697 } else {
698 ResourceMark rm(THREAD);
699 jio_fprintf(defaultStream::error_stream(),
700 ". Uncaught exception of type %s.",
701 ex->klass()->external_name());
702 }
703 }
704 }
705
706 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
707 JNI_END
708
709
710 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
711 JNIWrapper("ExceptionClear");
712
713 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
714
715 // The jni code might be using this API to clear java thrown exception.
716 // So just mark jvmti thread exception state as exception caught.
717 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
718 if (state != NULL && state->is_exception_detected()) {
719 state->set_exception_caught();
720 }
721 thread->clear_pending_exception();
722
723 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
724 JNI_END
725
726
727 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
728 JNIWrapper("FatalError");
729
730 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
731
732 tty->print_cr("FATAL ERROR in native method: %s", msg);
733 thread->print_stack();
734 os::abort(); // Dump core and abort
735 JNI_END
736
737
738 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
739 JNIWrapper("PushLocalFrame");
740
741 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
742
743 //%note jni_11
744 if (capacity < 0 ||
745 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
747 return JNI_ERR;
748 }
749 JNIHandleBlock* old_handles = thread->active_handles();
750 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
751 assert(new_handles != NULL, "should not be NULL");
752 new_handles->set_pop_frame_link(old_handles);
753 thread->set_active_handles(new_handles);
754 jint ret = JNI_OK;
755 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
756 return ret;
757 JNI_END
758
759
760 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
761 JNIWrapper("PopLocalFrame");
762
763 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
764
765 //%note jni_11
766 Handle result_handle(thread, JNIHandles::resolve(result));
767 JNIHandleBlock* old_handles = thread->active_handles();
768 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
769 if (new_handles != NULL) {
770 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
771 // This way code will still work if PopLocalFrame is called without a corresponding
772 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
773 // the release_block call will release the blocks.
774 thread->set_active_handles(new_handles);
775 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
776 JNIHandleBlock::release_block(old_handles, thread); // may block
777 result = JNIHandles::make_local(thread, result_handle());
778 }
779 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
780 return result;
781 JNI_END
782
783
784 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
785 JNIWrapper("NewGlobalRef");
786
787 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
788
789 Handle ref_handle(thread, JNIHandles::resolve(ref));
790 jobject ret = JNIHandles::make_global(ref_handle);
791
792 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
793 return ret;
794 JNI_END
795
796 // Must be JNI_ENTRY (with HandleMark)
797 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
798 JNIWrapper("DeleteGlobalRef");
799
800 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
801
802 JNIHandles::destroy_global(ref);
803
804 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
805 JNI_END
806
807 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
808 JNIWrapper("DeleteLocalRef");
809
810 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
811
812 JNIHandles::destroy_local(obj);
813
814 HOTSPOT_JNI_DELETELOCALREF_RETURN();
815 JNI_END
816
817 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
818 JNIWrapper("IsSameObject");
819
820 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
821
822 oop a = JNIHandles::resolve(r1);
823 oop b = JNIHandles::resolve(r2);
824 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
825
826 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
827 return ret;
828 JNI_END
829
830
831 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
832 JNIWrapper("NewLocalRef");
833
834 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
835
836 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
837
838 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
839 return ret;
840 JNI_END
841
842 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
843 JNIWrapper("EnsureLocalCapacity");
844
845 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
846
847 jint ret;
848 if (capacity >= 0 &&
849 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
850 ret = JNI_OK;
851 } else {
852 ret = JNI_ERR;
853 }
854
855 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
856 return ret;
857 JNI_END
858
859 // Return the Handle Type
860 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
861 JNIWrapper("GetObjectRefType");
862
863 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
864
865 jobjectRefType ret = JNIInvalidRefType;
866 if (obj != NULL) {
867 ret = JNIHandles::handle_type(thread, obj);
868 }
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
871 return ret;
872 JNI_END
873
874
875 class JNI_ArgumentPusher : public SignatureIterator {
876 protected:
877 JavaCallArguments* _arguments;
878
879 virtual void get_bool () = 0;
880 virtual void get_char () = 0;
881 virtual void get_short () = 0;
882 virtual void get_byte () = 0;
883 virtual void get_int () = 0;
884 virtual void get_long () = 0;
885 virtual void get_float () = 0;
886 virtual void get_double () = 0;
887 virtual void get_object () = 0;
888 virtual void get_valuetype() = 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_valuetype(int begin, int end) { if (!is_return_type()) get_valuetype(); }
910 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
911 inline void do_void() { }
912
913 JavaCallArguments* arguments() { return _arguments; }
914 void push_receiver(Handle h) { _arguments->push_oop(h); }
915 };
916
917
918 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
919 protected:
920 va_list _ap;
921
922 inline void get_bool() {
923 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
924 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
925 // TemplateInterpreterGenerator::generate_result_handler_for and
926 // SharedRuntime::generate_native_wrapper.
927 jboolean b = va_arg(_ap, jint);
928 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
929 }
930 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
931 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
932 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
933 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
934
935 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
936
937 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
938 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
939 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
940 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
941 inline void get_valuetype() { _arguments->push_jobject(va_arg(_ap, jobject)); }
942
943 inline void set_ap(va_list rap) {
944 va_copy(_ap, rap);
945 }
946
947 public:
948 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
949 : JNI_ArgumentPusher(signature) {
950 set_ap(rap);
951 }
952 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
953 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
954 set_ap(rap);
955 }
956
957 // Optimized path if we have the bitvector form of signature
958 void iterate( uint64_t fingerprint ) {
959 if (fingerprint == (uint64_t)CONST64(-1)) {
960 SignatureIterator::iterate(); // Must be too many arguments
961 } else {
962 _return_type = (BasicType)((fingerprint >> static_feature_size) &
963 result_feature_mask);
964
965 assert(fingerprint, "Fingerprint should not be 0");
966 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
967 while ( 1 ) {
968 switch ( fingerprint & parameter_feature_mask ) {
969 case bool_parm:
970 get_bool();
971 break;
972 case char_parm:
973 get_char();
974 break;
975 case short_parm:
976 get_short();
977 break;
978 case byte_parm:
979 get_byte();
980 break;
981 case int_parm:
982 get_int();
983 break;
984 case obj_parm:
985 get_object();
986 break;
987 case valuetype_parm:
988 get_valuetype();
989 break;
990 case long_parm:
991 get_long();
992 break;
993 case float_parm:
994 get_float();
995 break;
996 case double_parm:
997 get_double();
998 break;
999 case done_parm:
1000 return;
1001 break;
1002 default:
1003 ShouldNotReachHere();
1004 break;
1005 }
1006 fingerprint >>= parameter_feature_size;
1007 }
1008 }
1009 }
1010 };
1011
1012
1013 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1014 protected:
1015 const jvalue *_ap;
1016
1017 inline void get_bool() {
1018 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1019 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1020 // TemplateInterpreterGenerator::generate_result_handler_for and
1021 // SharedRuntime::generate_native_wrapper.
1022 jboolean b = (_ap++)->z;
1023 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1024 }
1025 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1026 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1027 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1028 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1029
1030 inline void get_long() { _arguments->push_long((_ap++)->j); }
1031 inline void get_float() { _arguments->push_float((_ap++)->f); }
1032 inline void get_double() { _arguments->push_double((_ap++)->d);}
1033 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1034 // value types are implemented with oops too
1035 inline void get_valuetype() { _arguments->push_jobject((_ap++)->l); }
1036
1037 inline void set_ap(const jvalue *rap) { _ap = rap; }
1038
1039 public:
1040 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1041 : JNI_ArgumentPusher(signature) {
1042 set_ap(rap);
1043 }
1044 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1045 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1046 set_ap(rap);
1047 }
1048
1049 // Optimized path if we have the bitvector form of signature
1050 void iterate( uint64_t fingerprint ) {
1051 if (fingerprint == (uint64_t)CONST64(-1)) {
1052 SignatureIterator::iterate(); // Must be too many arguments
1053 } else {
1054 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1055 result_feature_mask);
1056 assert(fingerprint, "Fingerprint should not be 0");
1057 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1058 while ( 1 ) {
1059 switch ( fingerprint & parameter_feature_mask ) {
1060 case bool_parm:
1061 get_bool();
1062 break;
1063 case char_parm:
1064 get_char();
1065 break;
1066 case short_parm:
1067 get_short();
1068 break;
1069 case byte_parm:
1070 get_byte();
1071 break;
1072 case int_parm:
1073 get_int();
1074 break;
1075 case obj_parm:
1076 get_object();
1077 break;
1078 case valuetype_parm:
1079 get_valuetype();
1080 break;
1081 case long_parm:
1082 get_long();
1083 break;
1084 case float_parm:
1085 get_float();
1086 break;
1087 case double_parm:
1088 get_double();
1089 break;
1090 case done_parm:
1091 return;
1092 break;
1093 default:
1094 ShouldNotReachHere();
1095 break;
1096 }
1097 fingerprint >>= parameter_feature_size;
1098 }
1099 }
1100 }
1101 };
1102
1103
1104 enum JNICallType {
1105 JNI_STATIC,
1106 JNI_VIRTUAL,
1107 JNI_NONVIRTUAL
1108 };
1109
1110
1111
1112 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1113 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1114
1115 // Create object to hold arguments for the JavaCall, and associate it with
1116 // the jni parser
1117 ResourceMark rm(THREAD);
1118 int number_of_parameters = method->size_of_parameters();
1119 JavaCallArguments java_args(number_of_parameters);
1120 args->set_java_argument_object(&java_args);
1121
1122 assert(method->is_static(), "method should be static");
1123
1124 // Fill out JavaCallArguments object
1125 args->iterate( Fingerprinter(method).fingerprint() );
1126 // Initialize result type
1127 result->set_type(args->get_ret_type());
1128
1129 // Invoke the method. Result is returned as oop.
1130 JavaCalls::call(result, method, &java_args, CHECK);
1131
1132 // Convert result
1133 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1134 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1135 }
1136 }
1137
1138
1139 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1140 oop recv = JNIHandles::resolve(receiver);
1141 if (recv == NULL) {
1142 THROW(vmSymbols::java_lang_NullPointerException());
1143 }
1144 Handle h_recv(THREAD, recv);
1145
1146 int number_of_parameters;
1147 Method* selected_method;
1148 {
1149 Method* m = Method::resolve_jmethod_id(method_id);
1150 number_of_parameters = m->size_of_parameters();
1151 Klass* holder = m->method_holder();
1152 if (call_type != JNI_VIRTUAL) {
1153 selected_method = m;
1154 } else if (!m->has_itable_index()) {
1155 // non-interface call -- for that little speed boost, don't handlize
1156 debug_only(NoSafepointVerifier nosafepoint;)
1157 // jni_GetMethodID makes sure class is linked and initialized
1158 // so m should have a valid vtable index.
1159 assert(m->valid_vtable_index(), "no valid vtable index");
1160 int vtbl_index = m->vtable_index();
1161 if (vtbl_index != Method::nonvirtual_vtable_index) {
1162 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1163 } else {
1164 // final method
1165 selected_method = m;
1166 }
1167 } else {
1168 // interface call
1169 int itbl_index = m->itable_index();
1170 Klass* k = h_recv->klass();
1171 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1172 }
1173 }
1174
1175 methodHandle method(THREAD, selected_method);
1176
1177 // Create object to hold arguments for the JavaCall, and associate it with
1178 // the jni parser
1179 ResourceMark rm(THREAD);
1180 JavaCallArguments java_args(number_of_parameters);
1181 args->set_java_argument_object(&java_args);
1182
1183 // handle arguments
1184 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1185 args->push_receiver(h_recv); // Push jobject handle
1186
1187 // Fill out JavaCallArguments object
1188 args->iterate( Fingerprinter(method).fingerprint() );
1189 // Initialize result type
1190 result->set_type(args->get_ret_type());
1191
1192 // Invoke the method. Result is returned as oop.
1193 JavaCalls::call(result, method, &java_args, CHECK);
1194
1195 // Convert result
1196 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1197 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1198 }
1199 }
1200
1201
1202 static instanceOop alloc_object(jclass clazz, TRAPS) {
1203 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1204 if (k == NULL) {
1205 ResourceMark rm(THREAD);
1206 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1207 }
1208 k->check_valid_for_instantiation(false, CHECK_NULL);
1209 k->initialize(CHECK_NULL);
1210 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1211 return ih;
1212 }
1213
1214 DT_RETURN_MARK_DECL(AllocObject, jobject
1215 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1216
1217 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1218 JNIWrapper("AllocObject");
1219
1220 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1221
1222 jobject ret = NULL;
1223 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1224
1225 instanceOop i = alloc_object(clazz, CHECK_NULL);
1226 ret = JNIHandles::make_local(env, i);
1227 return ret;
1228 JNI_END
1229
1230 DT_RETURN_MARK_DECL(NewObjectA, jobject
1231 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1232
1233 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1234 JNIWrapper("NewObjectA");
1235
1236 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1237
1238 jobject obj = NULL;
1239 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1240
1241 instanceOop i = alloc_object(clazz, CHECK_NULL);
1242 obj = JNIHandles::make_local(env, i);
1243 JavaValue jvalue(T_VOID);
1244 JNI_ArgumentPusherArray ap(methodID, args);
1245 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1246 return obj;
1247 JNI_END
1248
1249
1250 DT_RETURN_MARK_DECL(NewObjectV, jobject
1251 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1252
1253 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1254 JNIWrapper("NewObjectV");
1255
1256 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1257
1258 jobject obj = NULL;
1259 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1260
1261 instanceOop i = alloc_object(clazz, CHECK_NULL);
1262 obj = JNIHandles::make_local(env, i);
1263 JavaValue jvalue(T_VOID);
1264 JNI_ArgumentPusherVaArg ap(methodID, args);
1265 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1266 return obj;
1267 JNI_END
1268
1269
1270 DT_RETURN_MARK_DECL(NewObject, jobject
1271 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1272
1273 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1274 JNIWrapper("NewObject");
1275
1276 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1277
1278 jobject obj = NULL;
1279 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1280
1281 instanceOop i = alloc_object(clazz, CHECK_NULL);
1282 obj = JNIHandles::make_local(env, i);
1283 va_list args;
1284 va_start(args, methodID);
1285 JavaValue jvalue(T_VOID);
1286 JNI_ArgumentPusherVaArg ap(methodID, args);
1287 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1288 va_end(args);
1289 return obj;
1290 JNI_END
1291
1292
1293 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1294 JNIWrapper("GetObjectClass");
1295
1296 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1297
1298 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1299 jclass ret =
1300 (jclass) JNIHandles::make_local(env, k->java_mirror());
1301
1302 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1303 return ret;
1304 JNI_END
1305
1306 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1307 JNIWrapper("IsInstanceOf");
1308
1309 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1310
1311 jboolean ret = JNI_TRUE;
1312 if (obj != NULL) {
1313 ret = JNI_FALSE;
1314 Klass* k = java_lang_Class::as_Klass(
1315 JNIHandles::resolve_non_null(clazz));
1316 if (k != NULL) {
1317 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1318 }
1319 }
1320
1321 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1322 return ret;
1323 JNI_END
1324
1325
1326 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1327 const char *sig, bool is_static, TRAPS) {
1328 // %%%% This code should probably just call into a method in the LinkResolver
1329 //
1330 // The class should have been loaded (we have an instance of the class
1331 // passed in) so the method and signature should already be in the symbol
1332 // table. If they're not there, the method doesn't exist.
1333 const char *name_to_probe = (name_str == NULL)
1334 ? vmSymbols::object_initializer_name()->as_C_string()
1335 : name_str;
1336 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1337 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1338
1339 if (name == NULL || signature == NULL) {
1340 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341 }
1342
1343 // Throw a NoSuchMethodError exception if we have an instance of a
1344 // primitive java.lang.Class
1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1346 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1347 }
1348
1349 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1350
1351 // Make sure class is linked and initialized before handing id's out to
1352 // Method*s.
1353 klass->initialize(CHECK_NULL);
1354
1355 Method* m;
1356 if (name == vmSymbols::object_initializer_name() ||
1357 name == vmSymbols::class_initializer_name()) {
1358 // Never search superclasses for constructors
1359 if (klass->is_instance_klass()) {
1360 m = InstanceKlass::cast(klass)->find_method(name, signature);
1361 } else {
1362 m = NULL;
1363 }
1364 } else {
1365 m = klass->lookup_method(name, signature);
1366 if (m == NULL && klass->is_instance_klass()) {
1367 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1368 }
1369 }
1370 if (m == NULL || (m->is_static() != is_static)) {
1371 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1372 }
1373 return m->jmethod_id();
1374 }
1375
1376
1377 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1378 const char *name, const char *sig))
1379 JNIWrapper("GetMethodID");
1380 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1381 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1382 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1383 return ret;
1384 JNI_END
1385
1386
1387 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1388 const char *name, const char *sig))
1389 JNIWrapper("GetStaticMethodID");
1390 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1391 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1392 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1393 return ret;
1394 JNI_END
1395
1396
1397
1398 //
1399 // Calling Methods
1400 //
1401
1402
1403 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1404 , EntryProbe, ReturnProbe) \
1405 \
1406 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1407 , ReturnProbe); \
1408 \
1409 JNI_ENTRY(ResultType, \
1410 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1411 JNIWrapper("Call" XSTR(Result) "Method"); \
1412 \
1413 EntryProbe; \
1414 ResultType ret = 0;\
1415 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1416 (const ResultType&)ret);\
1417 \
1418 va_list args; \
1419 va_start(args, methodID); \
1420 JavaValue jvalue(Tag); \
1421 JNI_ArgumentPusherVaArg ap(methodID, args); \
1422 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1423 va_end(args); \
1424 ret = jvalue.get_##ResultType(); \
1425 return ret;\
1426 JNI_END
1427
1428 // the runtime type of subword integral basic types is integer
1429 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1430 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1433 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1436 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1439 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1441
1442 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1443 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1445 DEFINE_CALLMETHOD(jint, Int, T_INT,
1446 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1448 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1449 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1450 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1451 // Float and double probes don't return value because dtrace doesn't currently support it
1452 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1453 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1454 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1455 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1456 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1457 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1458
1459 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1460 , EntryProbe, ReturnProbe) \
1461 \
1462 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1463 , ReturnProbe); \
1464 \
1465 JNI_ENTRY(ResultType, \
1466 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1467 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1468 \
1469 EntryProbe;\
1470 ResultType ret = 0;\
1471 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1472 (const ResultType&)ret);\
1473 \
1474 JavaValue jvalue(Tag); \
1475 JNI_ArgumentPusherVaArg ap(methodID, args); \
1476 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1477 ret = jvalue.get_##ResultType(); \
1478 return ret;\
1479 JNI_END
1480
1481 // the runtime type of subword integral basic types is integer
1482 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1483 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1486 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1489 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1492 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1494
1495 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1496 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1498 DEFINE_CALLMETHODV(jint, Int, T_INT,
1499 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1501 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1502 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1504 // Float and double probes don't return value because dtrace doesn't currently support it
1505 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1506 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1507 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1508 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1509 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1510 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1511
1512 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1513 , EntryProbe, ReturnProbe) \
1514 \
1515 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1516 , ReturnProbe); \
1517 \
1518 JNI_ENTRY(ResultType, \
1519 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1520 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1521 EntryProbe; \
1522 ResultType ret = 0;\
1523 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1524 (const ResultType&)ret);\
1525 \
1526 JavaValue jvalue(Tag); \
1527 JNI_ArgumentPusherArray ap(methodID, args); \
1528 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1529 ret = jvalue.get_##ResultType(); \
1530 return ret;\
1531 JNI_END
1532
1533 // the runtime type of subword integral basic types is integer
1534 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1535 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1538 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1541 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1544 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1546
1547 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1548 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1550 DEFINE_CALLMETHODA(jint, Int, T_INT,
1551 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1553 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1554 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1555 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1556 // Float and double probes don't return value because dtrace doesn't currently support it
1557 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1558 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1559 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1560 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1561 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1562 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1563
1564 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1565 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1567
1568
1569 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1570 JNIWrapper("CallVoidMethod");
1571 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1572 DT_VOID_RETURN_MARK(CallVoidMethod);
1573
1574 va_list args;
1575 va_start(args, methodID);
1576 JavaValue jvalue(T_VOID);
1577 JNI_ArgumentPusherVaArg ap(methodID, args);
1578 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1579 va_end(args);
1580 JNI_END
1581
1582
1583 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1584 JNIWrapper("CallVoidMethodV");
1585 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1586 DT_VOID_RETURN_MARK(CallVoidMethodV);
1587
1588 JavaValue jvalue(T_VOID);
1589 JNI_ArgumentPusherVaArg ap(methodID, args);
1590 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1591 JNI_END
1592
1593
1594 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1595 JNIWrapper("CallVoidMethodA");
1596 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1597 DT_VOID_RETURN_MARK(CallVoidMethodA);
1598
1599 JavaValue jvalue(T_VOID);
1600 JNI_ArgumentPusherArray ap(methodID, args);
1601 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1602 JNI_END
1603
1604
1605
1606 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1607 , EntryProbe, ReturnProbe) \
1608 \
1609 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1610 , ReturnProbe);\
1611 \
1612 JNI_ENTRY(ResultType, \
1613 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1614 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1615 \
1616 EntryProbe;\
1617 ResultType ret;\
1618 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1619 (const ResultType&)ret);\
1620 \
1621 va_list args; \
1622 va_start(args, methodID); \
1623 JavaValue jvalue(Tag); \
1624 JNI_ArgumentPusherVaArg ap(methodID, args); \
1625 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1626 va_end(args); \
1627 ret = jvalue.get_##ResultType(); \
1628 return ret;\
1629 JNI_END
1630
1631 // the runtime type of subword integral basic types is integer
1632 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1633 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1635 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1636 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1639 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1642 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1644
1645 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1646 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1649 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1651 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1652 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1653 // Float and double probes don't return value because dtrace doesn't currently support it
1654 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1655 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1656 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1657 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1658 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1659 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1660 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1661
1662 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1663 , EntryProbe, ReturnProbe) \
1664 \
1665 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1666 , ReturnProbe);\
1667 \
1668 JNI_ENTRY(ResultType, \
1669 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1670 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1671 \
1672 EntryProbe;\
1673 ResultType ret;\
1674 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1675 (const ResultType&)ret);\
1676 \
1677 JavaValue jvalue(Tag); \
1678 JNI_ArgumentPusherVaArg ap(methodID, args); \
1679 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1680 ret = jvalue.get_##ResultType(); \
1681 return ret;\
1682 JNI_END
1683
1684 // the runtime type of subword integral basic types is integer
1685 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1686 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1688 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1689 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1692 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1695 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1697
1698 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1699 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1702 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1704 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1705 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1706 // Float and double probes don't return value because dtrace doesn't currently support it
1707 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1708 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1709 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1710 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1711 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1712 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1713 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1714
1715 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1716 , EntryProbe, ReturnProbe) \
1717 \
1718 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1719 , ReturnProbe);\
1720 \
1721 JNI_ENTRY(ResultType, \
1722 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1723 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1724 \
1725 EntryProbe;\
1726 ResultType ret;\
1727 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1728 (const ResultType&)ret);\
1729 \
1730 JavaValue jvalue(Tag); \
1731 JNI_ArgumentPusherArray ap(methodID, args); \
1732 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1733 ret = jvalue.get_##ResultType(); \
1734 return ret;\
1735 JNI_END
1736
1737 // the runtime type of subword integral basic types is integer
1738 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1739 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1741 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1742 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1745 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1748 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1750
1751 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1752 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1755 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1757 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1758 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1759 // Float and double probes don't return value because dtrace doesn't currently support it
1760 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1761 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1762 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1763 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1764 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1765 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1766 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1767
1768 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1769 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1770 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1771 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1772 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1773 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1774
1775 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1776 JNIWrapper("CallNonvirtualVoidMethod");
1777
1778 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1779 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1780
1781 va_list args;
1782 va_start(args, methodID);
1783 JavaValue jvalue(T_VOID);
1784 JNI_ArgumentPusherVaArg ap(methodID, args);
1785 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1786 va_end(args);
1787 JNI_END
1788
1789
1790 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1791 JNIWrapper("CallNonvirtualVoidMethodV");
1792
1793 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1794 env, obj, cls, (uintptr_t) methodID);
1795 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1796
1797 JavaValue jvalue(T_VOID);
1798 JNI_ArgumentPusherVaArg ap(methodID, args);
1799 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1800 JNI_END
1801
1802
1803 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1804 JNIWrapper("CallNonvirtualVoidMethodA");
1805 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1806 env, obj, cls, (uintptr_t) methodID);
1807 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1808 JavaValue jvalue(T_VOID);
1809 JNI_ArgumentPusherArray ap(methodID, args);
1810 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1811 JNI_END
1812
1813
1814
1815 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1816 , EntryProbe, ResultProbe) \
1817 \
1818 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1819 , ResultProbe); \
1820 \
1821 JNI_ENTRY(ResultType, \
1822 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1823 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1824 \
1825 EntryProbe; \
1826 ResultType ret = 0;\
1827 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1828 (const ResultType&)ret);\
1829 \
1830 va_list args; \
1831 va_start(args, methodID); \
1832 JavaValue jvalue(Tag); \
1833 JNI_ArgumentPusherVaArg ap(methodID, args); \
1834 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1835 va_end(args); \
1836 ret = jvalue.get_##ResultType(); \
1837 return ret;\
1838 JNI_END
1839
1840 // the runtime type of subword integral basic types is integer
1841 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1842 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1844 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1845 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1848 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1851 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1853
1854 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1855 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1857 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1858 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1860 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1861 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1862 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1863 // Float and double probes don't return value because dtrace doesn't currently support it
1864 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1865 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1866 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1867 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1868 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1869 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1870
1871 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1872 , EntryProbe, ResultProbe) \
1873 \
1874 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1875 , ResultProbe); \
1876 \
1877 JNI_ENTRY(ResultType, \
1878 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1879 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1880 \
1881 EntryProbe; \
1882 ResultType ret = 0;\
1883 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1884 (const ResultType&)ret);\
1885 \
1886 JavaValue jvalue(Tag); \
1887 JNI_ArgumentPusherVaArg ap(methodID, args); \
1888 /* Make sure class is initialized before trying to invoke its method */ \
1889 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1890 k->initialize(CHECK_0); \
1891 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1892 va_end(args); \
1893 ret = jvalue.get_##ResultType(); \
1894 return ret;\
1895 JNI_END
1896
1897 // the runtime type of subword integral basic types is integer
1898 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1899 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1901 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1902 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1905 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1908 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1910
1911 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1912 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1914 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1915 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1917 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1918 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1919 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1920 // Float and double probes don't return value because dtrace doesn't currently support it
1921 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1922 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1923 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1924 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1925 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1926 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1927
1928 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1929 , EntryProbe, ResultProbe) \
1930 \
1931 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1932 , ResultProbe); \
1933 \
1934 JNI_ENTRY(ResultType, \
1935 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1936 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1937 \
1938 EntryProbe; \
1939 ResultType ret = 0;\
1940 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1941 (const ResultType&)ret);\
1942 \
1943 JavaValue jvalue(Tag); \
1944 JNI_ArgumentPusherArray ap(methodID, args); \
1945 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1946 ret = jvalue.get_##ResultType(); \
1947 return ret;\
1948 JNI_END
1949
1950 // the runtime type of subword integral basic types is integer
1951 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1952 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1954 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1955 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1958 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1961 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1963
1964 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1965 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1967 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1968 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1970 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1971 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1972 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1973 // Float and double probes don't return value because dtrace doesn't currently support it
1974 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1975 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1976 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1977 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1978 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1979 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1980
1981 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1982 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1983 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1984 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1985 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1986 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1987
1988 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1989 JNIWrapper("CallStaticVoidMethod");
1990 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1991 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1992
1993 va_list args;
1994 va_start(args, methodID);
1995 JavaValue jvalue(T_VOID);
1996 JNI_ArgumentPusherVaArg ap(methodID, args);
1997 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1998 va_end(args);
1999 JNI_END
2000
2001
2002 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2003 JNIWrapper("CallStaticVoidMethodV");
2004 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2005 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2006
2007 JavaValue jvalue(T_VOID);
2008 JNI_ArgumentPusherVaArg ap(methodID, args);
2009 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2010 JNI_END
2011
2012
2013 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2014 JNIWrapper("CallStaticVoidMethodA");
2015 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2016 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2017
2018 JavaValue jvalue(T_VOID);
2019 JNI_ArgumentPusherArray ap(methodID, args);
2020 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2021 JNI_END
2022
2023
2024 //
2025 // Accessing Fields
2026 //
2027
2028
2029 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2030 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2031
2032 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2033 const char *name, const char *sig))
2034 JNIWrapper("GetFieldID");
2035 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2036 jfieldID ret = 0;
2037 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2038
2039 // The class should have been loaded (we have an instance of the class
2040 // passed in) so the field and signature should already be in the symbol
2041 // table. If they're not there, the field doesn't exist.
2042 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2043 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2044 if (fieldname == NULL || signame == NULL) {
2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2046 }
2047 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2048 // Make sure class is initialized before handing id's out to fields
2049 k->initialize(CHECK_NULL);
2050
2051 fieldDescriptor fd;
2052 if (!k->is_instance_klass() ||
2053 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2054 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2055 }
2056
2057 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2058 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2059 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2060 return ret;
2061 JNI_END
2062
2063
2064 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2065 JNIWrapper("GetObjectField");
2066 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2067 oop o = JNIHandles::resolve_non_null(obj);
2068 Klass* k = o->klass();
2069 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2070 // Keep JVMTI addition small and only check enabled flag here.
2071 // jni_GetField_probe() assumes that is okay to create handles.
2072 if (JvmtiExport::should_post_field_access()) {
2073 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2074 }
2075 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2076 jobject ret = JNIHandles::make_local(env, loaded_obj);
2077 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2078 return ret;
2079 JNI_END
2080
2081
2082
2083 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2084 , EntryProbe, ReturnProbe) \
2085 \
2086 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2087 , ReturnProbe); \
2088 \
2089 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2090 JNIWrapper("Get" XSTR(Result) "Field"); \
2091 \
2092 EntryProbe; \
2093 Return ret = 0;\
2094 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2095 \
2096 oop o = JNIHandles::resolve_non_null(obj); \
2097 Klass* k = o->klass(); \
2098 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2099 /* Keep JVMTI addition small and only check enabled flag here. */ \
2100 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2101 /* and creates a ResetNoHandleMark. */ \
2102 if (JvmtiExport::should_post_field_access()) { \
2103 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2104 } \
2105 ret = o->Fieldname##_field(offset); \
2106 return ret; \
2107 JNI_END
2108
2109 DEFINE_GETFIELD(jboolean, bool, Boolean
2110 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2112 DEFINE_GETFIELD(jbyte, byte, Byte
2113 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2115 DEFINE_GETFIELD(jchar, char, Char
2116 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2117 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2118 DEFINE_GETFIELD(jshort, short, Short
2119 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2120 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2121 DEFINE_GETFIELD(jint, int, Int
2122 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2124 DEFINE_GETFIELD(jlong, long, Long
2125 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2127 // Float and double probes don't return value because dtrace doesn't currently support it
2128 DEFINE_GETFIELD(jfloat, float, Float
2129 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2131 DEFINE_GETFIELD(jdouble, double, Double
2132 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2134
2135 address jni_GetBooleanField_addr() {
2136 return (address)jni_GetBooleanField;
2137 }
2138 address jni_GetByteField_addr() {
2139 return (address)jni_GetByteField;
2140 }
2141 address jni_GetCharField_addr() {
2142 return (address)jni_GetCharField;
2143 }
2144 address jni_GetShortField_addr() {
2145 return (address)jni_GetShortField;
2146 }
2147 address jni_GetIntField_addr() {
2148 return (address)jni_GetIntField;
2149 }
2150 address jni_GetLongField_addr() {
2151 return (address)jni_GetLongField;
2152 }
2153 address jni_GetFloatField_addr() {
2154 return (address)jni_GetFloatField;
2155 }
2156 address jni_GetDoubleField_addr() {
2157 return (address)jni_GetDoubleField;
2158 }
2159
2160 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2161 JNIWrapper("SetObjectField");
2162 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2163 oop o = JNIHandles::resolve_non_null(obj);
2164 Klass* k = o->klass();
2165 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2166 // Keep JVMTI addition small and only check enabled flag here.
2167 // jni_SetField_probe_nh() assumes that is not okay to create handles
2168 // and creates a ResetNoHandleMark.
2169 if (JvmtiExport::should_post_field_modification()) {
2170 jvalue field_value;
2171 field_value.l = value;
2172 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2173 }
2174 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2175 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2176 JNI_END
2177
2178
2179 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2180 , EntryProbe, ReturnProbe) \
2181 \
2182 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2183 JNIWrapper("Set" XSTR(Result) "Field"); \
2184 \
2185 EntryProbe; \
2186 \
2187 oop o = JNIHandles::resolve_non_null(obj); \
2188 Klass* k = o->klass(); \
2189 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2190 /* Keep JVMTI addition small and only check enabled flag here. */ \
2191 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2192 /* and creates a ResetNoHandleMark. */ \
2193 if (JvmtiExport::should_post_field_modification()) { \
2194 jvalue field_value; \
2195 field_value.unionType = value; \
2196 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2197 } \
2198 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2199 o->Fieldname##_field_put(offset, value); \
2200 ReturnProbe; \
2201 JNI_END
2202
2203 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2204 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2206 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2207 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2209 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2210 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2212 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2213 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2214 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2215 DEFINE_SETFIELD(jint, int, Int, 'I', i
2216 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2217 HOTSPOT_JNI_SETINTFIELD_RETURN())
2218 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2219 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2220 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2221 // Float and double probes don't return value because dtrace doesn't currently support it
2222 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2223 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2224 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2225 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2226 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2227 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2228
2229 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2230 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2231
2232 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2233 JNIWrapper("ToReflectedField");
2234 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2235 jobject ret = NULL;
2236 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2237
2238 fieldDescriptor fd;
2239 bool found = false;
2240 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2241
2242 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2243
2244 if (isStatic) {
2245 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2246 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2247 assert(id->is_static_field_id(), "invalid static field id");
2248 found = id->find_local_field(&fd);
2249 } else {
2250 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2251 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2252 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2253 }
2254 assert(found, "bad fieldID passed into jni_ToReflectedField");
2255 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2256 ret = JNIHandles::make_local(env, reflected);
2257 return ret;
2258 JNI_END
2259
2260
2261 //
2262 // Accessing Static Fields
2263 //
2264 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2265 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2266
2267 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2268 const char *name, const char *sig))
2269 JNIWrapper("GetStaticFieldID");
2270 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2271 jfieldID ret = NULL;
2272 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2273
2274 // The class should have been loaded (we have an instance of the class
2275 // passed in) so the field and signature should already be in the symbol
2276 // table. If they're not there, the field doesn't exist.
2277 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2278 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2279 if (fieldname == NULL || signame == NULL) {
2280 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2281 }
2282 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2283 // Make sure class is initialized before handing id's out to static fields
2284 k->initialize(CHECK_NULL);
2285
2286 fieldDescriptor fd;
2287 if (!k->is_instance_klass() ||
2288 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2289 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2290 }
2291
2292 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2293 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2294 debug_only(id->set_is_static_field_id();)
2295
2296 debug_only(id->verify(fd.field_holder()));
2297
2298 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2299 return ret;
2300 JNI_END
2301
2302
2303 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2304 JNIWrapper("GetStaticObjectField");
2305 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2306 #if INCLUDE_JNI_CHECK
2307 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2308 #endif // INCLUDE_JNI_CHECK
2309 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2310 assert(id->is_static_field_id(), "invalid static field id");
2311 // Keep JVMTI addition small and only check enabled flag here.
2312 // jni_GetField_probe() assumes that is okay to create handles.
2313 if (JvmtiExport::should_post_field_access()) {
2314 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2315 }
2316 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2317 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2318 return ret;
2319 JNI_END
2320
2321
2322 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2323 , EntryProbe, ReturnProbe) \
2324 \
2325 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2326 , ReturnProbe); \
2327 \
2328 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2329 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2330 EntryProbe; \
2331 Return ret = 0;\
2332 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2333 (const Return&)ret);\
2334 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2335 assert(id->is_static_field_id(), "invalid static field id"); \
2336 /* Keep JVMTI addition small and only check enabled flag here. */ \
2337 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2338 if (JvmtiExport::should_post_field_access()) { \
2339 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2340 } \
2341 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2342 return ret;\
2343 JNI_END
2344
2345 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2346 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2347 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2348 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2349 DEFINE_GETSTATICFIELD(jchar, char, Char
2350 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2351 DEFINE_GETSTATICFIELD(jshort, short, Short
2352 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2353 DEFINE_GETSTATICFIELD(jint, int, Int
2354 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2355 DEFINE_GETSTATICFIELD(jlong, long, Long
2356 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2357 // Float and double probes don't return value because dtrace doesn't currently support it
2358 DEFINE_GETSTATICFIELD(jfloat, float, Float
2359 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2360 DEFINE_GETSTATICFIELD(jdouble, double, Double
2361 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2362
2363 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2364 JNIWrapper("SetStaticObjectField");
2365 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2366 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2367 assert(id->is_static_field_id(), "invalid static field id");
2368 // Keep JVMTI addition small and only check enabled flag here.
2369 // jni_SetField_probe() assumes that is okay to create handles.
2370 if (JvmtiExport::should_post_field_modification()) {
2371 jvalue field_value;
2372 field_value.l = value;
2373 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2374 }
2375 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2376 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2377 JNI_END
2378
2379
2380
2381 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2382 , EntryProbe, ReturnProbe) \
2383 \
2384 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2385 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2386 EntryProbe; \
2387 \
2388 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2389 assert(id->is_static_field_id(), "invalid static field id"); \
2390 /* Keep JVMTI addition small and only check enabled flag here. */ \
2391 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2392 if (JvmtiExport::should_post_field_modification()) { \
2393 jvalue field_value; \
2394 field_value.unionType = value; \
2395 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2396 } \
2397 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2398 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2399 ReturnProbe;\
2400 JNI_END
2401
2402 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2403 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2404 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2406 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2409 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2411 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2412 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2413 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2414 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2415 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2416 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2417 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2418 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2419 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2420 // Float and double probes don't return value because dtrace doesn't currently support it
2421 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2422 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2423 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2425 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2426 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2427
2428 //
2429 // String Operations
2430 //
2431
2432 // Unicode Interface
2433
2434 DT_RETURN_MARK_DECL(NewString, jstring
2435 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2436
2437 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2438 JNIWrapper("NewString");
2439 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2440 jstring ret = NULL;
2441 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2442 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2443 ret = (jstring) JNIHandles::make_local(env, string);
2444 return ret;
2445 JNI_END
2446
2447
2448 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2449 JNIWrapper("GetStringLength");
2450 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2451 jsize ret = 0;
2452 oop s = JNIHandles::resolve_non_null(string);
2453 if (java_lang_String::value(s) != NULL) {
2454 ret = java_lang_String::length(s);
2455 }
2456 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2457 return ret;
2458 JNI_END
2459
2460
2461 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2462 JNIEnv *env, jstring string, jboolean *isCopy))
2463 JNIWrapper("GetStringChars");
2464 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2465 jchar* buf = NULL;
2466 oop s = JNIHandles::resolve_non_null(string);
2467 typeArrayOop s_value = java_lang_String::value(s);
2468 if (s_value != NULL) {
2469 int s_len = java_lang_String::length(s);
2470 bool is_latin1 = java_lang_String::is_latin1(s);
2471 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2472 /* JNI Specification states return NULL on OOM */
2473 if (buf != NULL) {
2474 if (s_len > 0) {
2475 if (!is_latin1) {
2476 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2477 } else {
2478 for (int i = 0; i < s_len; i++) {
2479 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2480 }
2481 }
2482 }
2483 buf[s_len] = 0;
2484 //%note jni_5
2485 if (isCopy != NULL) {
2486 *isCopy = JNI_TRUE;
2487 }
2488 }
2489 }
2490 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2491 return buf;
2492 JNI_END
2493
2494
2495 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2496 JNIWrapper("ReleaseStringChars");
2497 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2498 //%note jni_6
2499 if (chars != NULL) {
2500 // Since String objects are supposed to be immutable, don't copy any
2501 // new data back. A bad user will have to go after the char array.
2502 FreeHeap((void*) chars);
2503 }
2504 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2505 JNI_END
2506
2507
2508 // UTF Interface
2509
2510 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2511 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2512
2513 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2514 JNIWrapper("NewStringUTF");
2515 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2516 jstring ret;
2517 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2518
2519 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2520 ret = (jstring) JNIHandles::make_local(env, result);
2521 return ret;
2522 JNI_END
2523
2524
2525 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2526 JNIWrapper("GetStringUTFLength");
2527 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2528 jsize ret = 0;
2529 oop java_string = JNIHandles::resolve_non_null(string);
2530 if (java_lang_String::value(java_string) != NULL) {
2531 ret = java_lang_String::utf8_length(java_string);
2532 }
2533 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2534 return ret;
2535 JNI_END
2536
2537
2538 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2539 JNIWrapper("GetStringUTFChars");
2540 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2541 char* result = NULL;
2542 oop java_string = JNIHandles::resolve_non_null(string);
2543 if (java_lang_String::value(java_string) != NULL) {
2544 size_t length = java_lang_String::utf8_length(java_string);
2545 /* JNI Specification states return NULL on OOM */
2546 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2547 if (result != NULL) {
2548 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2549 if (isCopy != NULL) {
2550 *isCopy = JNI_TRUE;
2551 }
2552 }
2553 }
2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2555 return result;
2556 JNI_END
2557
2558
2559 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2560 JNIWrapper("ReleaseStringUTFChars");
2561 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2562 if (chars != NULL) {
2563 FreeHeap((char*) chars);
2564 }
2565 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2566 JNI_END
2567
2568
2569 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2570 JNIWrapper("GetArrayLength");
2571 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2572 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2573 assert(a->is_array(), "must be array");
2574 jsize ret = a->length();
2575 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2576 return ret;
2577 JNI_END
2578
2579
2580 //
2581 // Object Array Operations
2582 //
2583
2584 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2585 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2586
2587 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2588 JNIWrapper("NewObjectArray");
2589 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2590 jobjectArray ret = NULL;
2591 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2592 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2593 Klass* ak = ek->array_klass(CHECK_NULL);
2594 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2595 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2596 oop initial_value = JNIHandles::resolve(initialElement);
2597 if (initial_value != NULL) { // array already initialized with NULL
2598 for (int index = 0; index < length; index++) {
2599 result->obj_at_put(index, initial_value);
2600 }
2601 }
2602 ret = (jobjectArray) JNIHandles::make_local(env, result);
2603 return ret;
2604 JNI_END
2605
2606 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2607 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2608
2609 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2610 JNIWrapper("GetObjectArrayElement");
2611 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2612 jobject ret = NULL;
2613 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2614 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2615 if (a->is_within_bounds(index)) {
2616 ret = JNIHandles::make_local(env, a->obj_at(index));
2617 return ret;
2618 } else {
2619 char buf[jintAsStringSize];
2620 sprintf(buf, "%d", index);
2621 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2622 }
2623 JNI_END
2624
2625 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2626 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2627
2628 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2629 JNIWrapper("SetObjectArrayElement");
2630 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2631 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2632
2633 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2634 oop v = JNIHandles::resolve(value);
2635 if (a->is_within_bounds(index)) {
2636 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2637 a->obj_at_put(index, v);
2638 } else {
2639 THROW(vmSymbols::java_lang_ArrayStoreException());
2640 }
2641 } else {
2642 char buf[jintAsStringSize];
2643 sprintf(buf, "%d", index);
2644 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2645 }
2646 JNI_END
2647
2648
2649
2650 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2651 ,EntryProbe,ReturnProbe) \
2652 \
2653 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2654 , ReturnProbe); \
2655 \
2656 JNI_ENTRY(Return, \
2657 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2658 JNIWrapper("New" XSTR(Result) "Array"); \
2659 EntryProbe; \
2660 Return ret = NULL;\
2661 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2662 \
2663 oop obj= oopFactory::Allocator(len, CHECK_0); \
2664 ret = (Return) JNIHandles::make_local(env, obj); \
2665 return ret;\
2666 JNI_END
2667
2668 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2669 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2672 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2675 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2678 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2681 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2684 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2687 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2690 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2692
2693 // Return an address which will fault if the caller writes to it.
2694
2695 static char* get_bad_address() {
2696 static char* bad_address = NULL;
2697 if (bad_address == NULL) {
2698 size_t size = os::vm_allocation_granularity();
2699 bad_address = os::reserve_memory(size);
2700 if (bad_address != NULL) {
2701 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2702 /*is_committed*/false);
2703 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2704 }
2705 }
2706 return bad_address;
2707 }
2708
2709
2710
2711 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2712 , EntryProbe, ReturnProbe) \
2713 \
2714 JNI_QUICK_ENTRY(ElementType*, \
2715 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2716 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2717 EntryProbe; \
2718 /* allocate an chunk of memory in c land */ \
2719 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2720 ElementType* result; \
2721 int len = a->length(); \
2722 if (len == 0) { \
2723 /* Empty array: legal but useless, can't return NULL. \
2724 * Return a pointer to something useless. \
2725 * Avoid asserts in typeArrayOop. */ \
2726 result = (ElementType*)get_bad_address(); \
2727 } else { \
2728 /* JNI Specification states return NULL on OOM */ \
2729 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2730 if (result != NULL) { \
2731 /* copy the array to the c chunk */ \
2732 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2733 if (isCopy) { \
2734 *isCopy = JNI_TRUE; \
2735 } \
2736 } \
2737 } \
2738 ReturnProbe; \
2739 return result; \
2740 JNI_END
2741
2742 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2743 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2744 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2745 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2746 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2747 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2748 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2749 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2750 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2751 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2752 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2753 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2754 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2755 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2757 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2758 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2760 // Float and double probes don't return value because dtrace doesn't currently support it
2761 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2762 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2765 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2766 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2767
2768
2769 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2770 , EntryProbe, ReturnProbe);\
2771 \
2772 JNI_QUICK_ENTRY(void, \
2773 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2774 ElementType *buf, jint mode)) \
2775 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2776 EntryProbe; \
2777 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2778 int len = a->length(); \
2779 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2780 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2781 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2782 } \
2783 if ((mode == 0) || (mode == JNI_ABORT)) { \
2784 FreeHeap(buf); \
2785 } \
2786 } \
2787 ReturnProbe; \
2788 JNI_END
2789
2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2791 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2792 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2794 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2795 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2797 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2798 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2800 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2801 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2803 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2804 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2806 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2807 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2809 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2810 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2812 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2813 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2814
2815
2816 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2817 , EntryProbe, ReturnProbe); \
2818 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2819 , ReturnProbe); \
2820 \
2821 JNI_ENTRY(void, \
2822 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2823 jsize len, ElementType *buf)) \
2824 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2825 EntryProbe; \
2826 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2827 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2828 if (start < 0 || len < 0 || (start > src->length() - len)) { \
2829 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2830 } else { \
2831 if (len > 0) { \
2832 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2833 memcpy((u_char*) buf, \
2834 (u_char*) src->Tag##_at_addr(start), \
2835 len << sc); \
2836 } \
2837 } \
2838 JNI_END
2839
2840 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2841 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2842 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2843 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2844 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2845 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2846 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2847 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2848 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2849 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2850 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2851 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2852 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2853 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2854 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2855 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2856 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2857 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2858 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2859 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2860 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2862 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2863 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2864
2865
2866 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2867 , EntryProbe, ReturnProbe); \
2868 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2869 ,ReturnProbe); \
2870 \
2871 JNI_ENTRY(void, \
2872 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2873 jsize len, const ElementType *buf)) \
2874 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2875 EntryProbe; \
2876 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2877 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2878 if (start < 0 || len < 0 || (start > dst->length() - len)) { \
2879 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2880 } else { \
2881 if (len > 0) { \
2882 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2883 memcpy((u_char*) dst->Tag##_at_addr(start), \
2884 (u_char*) buf, \
2885 len << sc); \
2886 } \
2887 } \
2888 JNI_END
2889
2890 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2891 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2892 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2893 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2894 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2895 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2896 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2897 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2898 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2899 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2900 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2901 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2902 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2903 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2904 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2905 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2906 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2907 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2909 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2910 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2912 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2913 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2914
2915
2916 //
2917 // Interception of natives
2918 //
2919
2920 // The RegisterNatives call being attempted tried to register with a method that
2921 // is not native. Ask JVM TI what prefixes have been specified. Then check
2922 // to see if the native method is now wrapped with the prefixes. See the
2923 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2924 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2925 #if INCLUDE_JVMTI
2926 ResourceMark rm(THREAD);
2927 Method* method;
2928 int name_len = name->utf8_length();
2929 char* name_str = name->as_utf8();
2930 int prefix_count;
2931 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2932 for (int i = 0; i < prefix_count; i++) {
2933 char* prefix = prefixes[i];
2934 int prefix_len = (int)strlen(prefix);
2935
2936 // try adding this prefix to the method name and see if it matches another method name
2937 int trial_len = name_len + prefix_len;
2938 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2939 strcpy(trial_name_str, prefix);
2940 strcat(trial_name_str, name_str);
2941 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2942 if (trial_name == NULL) {
2943 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2944 }
2945 method = k->lookup_method(trial_name, signature);
2946 if (method == NULL) {
2947 continue; // signature doesn't match, try the next prefix
2948 }
2949 if (method->is_native()) {
2950 method->set_is_prefixed_native();
2951 return method; // wahoo, we found a prefixed version of the method, return it
2952 }
2953 // found as non-native, so prefix is good, add it, probably just need more prefixes
2954 name_len = trial_len;
2955 name_str = trial_name_str;
2956 }
2957 #endif // INCLUDE_JVMTI
2958 return NULL; // not found
2959 }
2960
2961 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2962 Method* method = k->lookup_method(name, signature);
2963 if (method == NULL) {
2964 ResourceMark rm;
2965 stringStream st;
2966 st.print("Method %s name or signature does not match",
2967 Method::name_and_sig_as_C_string(k, name, signature));
2968 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2969 }
2970 if (!method->is_native()) {
2971 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2972 method = find_prefixed_native(k, name, signature, THREAD);
2973 if (method == NULL) {
2974 ResourceMark rm;
2975 stringStream st;
2976 st.print("Method %s is not declared as native",
2977 Method::name_and_sig_as_C_string(k, name, signature));
2978 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2979 }
2980 }
2981
2982 if (entry != NULL) {
2983 method->set_native_function(entry,
2984 Method::native_bind_event_is_interesting);
2985 } else {
2986 method->clear_native_function();
2987 }
2988 if (PrintJNIResolving) {
2989 ResourceMark rm(THREAD);
2990 tty->print_cr("[Registering JNI native method %s.%s]",
2991 method->method_holder()->external_name(),
2992 method->name()->as_C_string());
2993 }
2994 return true;
2995 }
2996
2997 DT_RETURN_MARK_DECL(RegisterNatives, jint
2998 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2999
3000 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3001 const JNINativeMethod *methods,
3002 jint nMethods))
3003 JNIWrapper("RegisterNatives");
3004 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3005 jint ret = 0;
3006 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3007
3008 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3009
3010 for (int index = 0; index < nMethods; index++) {
3011 const char* meth_name = methods[index].name;
3012 const char* meth_sig = methods[index].signature;
3013 int meth_name_len = (int)strlen(meth_name);
3014
3015 // The class should have been loaded (we have an instance of the class
3016 // passed in) so the method and signature should already be in the symbol
3017 // table. If they're not there, the method doesn't exist.
3018 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3019 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3020
3021 if (name == NULL || signature == NULL) {
3022 ResourceMark rm;
3023 stringStream st;
3024 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3025 // Must return negative value on failure
3026 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3027 }
3028
3029 bool res = register_native(k, name, signature,
3030 (address) methods[index].fnPtr, THREAD);
3031 if (!res) {
3032 ret = -1;
3033 break;
3034 }
3035 }
3036 return ret;
3037 JNI_END
3038
3039
3040 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3041 JNIWrapper("UnregisterNatives");
3042 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3043 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3044 //%note jni_2
3045 if (k->is_instance_klass()) {
3046 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3047 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3048 if (m->is_native()) {
3049 m->clear_native_function();
3050 m->set_signature_handler(NULL);
3051 }
3052 }
3053 }
3054 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3055 return 0;
3056 JNI_END
3057
3058 //
3059 // Monitor functions
3060 //
3061
3062 DT_RETURN_MARK_DECL(MonitorEnter, jint
3063 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3064
3065 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3066 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3067 jint ret = JNI_ERR;
3068 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3069
3070 // If the object is null, we can't do anything with it
3071 if (jobj == NULL) {
3072 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3073 }
3074
3075 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3076 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3077 ret = JNI_OK;
3078 return ret;
3079 JNI_END
3080
3081 DT_RETURN_MARK_DECL(MonitorExit, jint
3082 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3083
3084 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3085 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3086 jint ret = JNI_ERR;
3087 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3088
3089 // Don't do anything with a null object
3090 if (jobj == NULL) {
3091 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3092 }
3093
3094 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3095 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3096
3097 ret = JNI_OK;
3098 return ret;
3099 JNI_END
3100
3101 //
3102 // Extensions
3103 //
3104
3105 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3106 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3107
3108 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3109 JNIWrapper("GetStringRegion");
3110 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3111 DT_VOID_RETURN_MARK(GetStringRegion);
3112 oop s = JNIHandles::resolve_non_null(string);
3113 int s_len = java_lang_String::length(s);
3114 if (start < 0 || len < 0 || start > s_len - len) {
3115 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3116 } else {
3117 if (len > 0) {
3118 typeArrayOop s_value = java_lang_String::value(s);
3119 bool is_latin1 = java_lang_String::is_latin1(s);
3120 if (!is_latin1) {
3121 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3122 } else {
3123 for (int i = 0; i < len; i++) {
3124 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3125 }
3126 }
3127 }
3128 }
3129 JNI_END
3130
3131 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3132 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3133
3134 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3135 JNIWrapper("GetStringUTFRegion");
3136 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3137 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3138 oop s = JNIHandles::resolve_non_null(string);
3139 int s_len = java_lang_String::length(s);
3140 if (start < 0 || len < 0 || start > s_len - len) {
3141 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3142 } else {
3143 //%note jni_7
3144 if (len > 0) {
3145 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3146 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3147 // as_utf8_string null-terminates the result string
3148 } else {
3149 // JDK null-terminates the buffer even in len is zero
3150 if (buf != NULL) {
3151 buf[0] = 0;
3152 }
3153 }
3154 }
3155 JNI_END
3156
3157
3158 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3159 JNIWrapper("GetPrimitiveArrayCritical");
3160 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3161 GCLocker::lock_critical(thread);
3162 if (isCopy != NULL) {
3163 *isCopy = JNI_FALSE;
3164 }
3165 oop a = JNIHandles::resolve_non_null(array);
3166 assert(a->is_array(), "just checking");
3167 BasicType type;
3168 if (a->is_objArray()) {
3169 type = T_OBJECT;
3170 } else {
3171 type = TypeArrayKlass::cast(a->klass())->element_type();
3172 }
3173 void* ret = arrayOop(a)->base(type);
3174 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3175 return ret;
3176 JNI_END
3177
3178
3179 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3180 JNIWrapper("ReleasePrimitiveArrayCritical");
3181 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3182 // The array, carray and mode arguments are ignored
3183 GCLocker::unlock_critical(thread);
3184 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3185 JNI_END
3186
3187
3188 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3189 JNIWrapper("GetStringCritical");
3190 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3191 GCLocker::lock_critical(thread);
3192 oop s = JNIHandles::resolve_non_null(string);
3193 typeArrayOop s_value = java_lang_String::value(s);
3194 bool is_latin1 = java_lang_String::is_latin1(s);
3195 if (isCopy != NULL) {
3196 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3197 }
3198 jchar* ret;
3199 if (!is_latin1) {
3200 ret = (jchar*) s_value->base(T_CHAR);
3201 } else {
3202 // Inflate latin1 encoded string to UTF16
3203 int s_len = java_lang_String::length(s);
3204 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3205 /* JNI Specification states return NULL on OOM */
3206 if (ret != NULL) {
3207 for (int i = 0; i < s_len; i++) {
3208 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3209 }
3210 ret[s_len] = 0;
3211 }
3212 }
3213 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3214 return ret;
3215 JNI_END
3216
3217
3218 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3219 JNIWrapper("ReleaseStringCritical");
3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3221 // The str and chars arguments are ignored for UTF16 strings
3222 oop s = JNIHandles::resolve_non_null(str);
3223 bool is_latin1 = java_lang_String::is_latin1(s);
3224 if (is_latin1) {
3225 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3226 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3227 FREE_C_HEAP_ARRAY(jchar, chars);
3228 }
3229 GCLocker::unlock_critical(thread);
3230 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3231 JNI_END
3232
3233
3234 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3235 JNIWrapper("jni_NewWeakGlobalRef");
3236 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3237 Handle ref_handle(thread, JNIHandles::resolve(ref));
3238 jweak ret = JNIHandles::make_weak_global(ref_handle);
3239 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3240 return ret;
3241 JNI_END
3242
3243 // Must be JNI_ENTRY (with HandleMark)
3244 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3245 JNIWrapper("jni_DeleteWeakGlobalRef");
3246 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3247 JNIHandles::destroy_weak_global(ref);
3248 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3249 JNI_END
3250
3251
3252 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3253 JNIWrapper("jni_ExceptionCheck");
3254 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3255 jni_check_async_exceptions(thread);
3256 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3257 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3258 return ret;
3259 JNI_END
3260
3261
3262 // Initialization state for three routines below relating to
3263 // java.nio.DirectBuffers
3264 static int directBufferSupportInitializeStarted = 0;
3265 static volatile int directBufferSupportInitializeEnded = 0;
3266 static volatile int directBufferSupportInitializeFailed = 0;
3267 static jclass bufferClass = NULL;
3268 static jclass directBufferClass = NULL;
3269 static jclass directByteBufferClass = NULL;
3270 static jmethodID directByteBufferConstructor = NULL;
3271 static jfieldID directBufferAddressField = NULL;
3272 static jfieldID bufferCapacityField = NULL;
3273
3274 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3275 Handle loader; // null (bootstrap) loader
3276 Handle protection_domain; // null protection domain
3277
3278 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3279 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3280
3281 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3282 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3283 }
3284 return result;
3285 }
3286
3287 // These lookups are done with the NULL (bootstrap) ClassLoader to
3288 // circumvent any security checks that would be done by jni_FindClass.
3289 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3290 {
3291 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3292 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3293 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3294 return true;
3295 }
3296 JNI_END
3297
3298
3299 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3300 if (directBufferSupportInitializeFailed) {
3301 return false;
3302 }
3303
3304 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3305 if (!lookupDirectBufferClasses(env)) {
3306 directBufferSupportInitializeFailed = 1;
3307 return false;
3308 }
3309
3310 // Make global references for these
3311 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3312 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3313 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3314
3315 // Get needed field and method IDs
3316 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3317 if (env->ExceptionCheck()) {
3318 env->ExceptionClear();
3319 directBufferSupportInitializeFailed = 1;
3320 return false;
3321 }
3322 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3323 if (env->ExceptionCheck()) {
3324 env->ExceptionClear();
3325 directBufferSupportInitializeFailed = 1;
3326 return false;
3327 }
3328 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3329 if (env->ExceptionCheck()) {
3330 env->ExceptionClear();
3331 directBufferSupportInitializeFailed = 1;
3332 return false;
3333 }
3334
3335 if ((directByteBufferConstructor == NULL) ||
3336 (directBufferAddressField == NULL) ||
3337 (bufferCapacityField == NULL)) {
3338 directBufferSupportInitializeFailed = 1;
3339 return false;
3340 }
3341
3342 directBufferSupportInitializeEnded = 1;
3343 } else {
3344 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3345 os::naked_yield();
3346 }
3347 }
3348
3349 return !directBufferSupportInitializeFailed;
3350 }
3351
3352 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3353 {
3354 // thread_from_jni_environment() will block if VM is gone.
3355 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3356
3357 JNIWrapper("jni_NewDirectByteBuffer");
3358 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3359
3360 if (!directBufferSupportInitializeEnded) {
3361 if (!initializeDirectBufferSupport(env, thread)) {
3362 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3363 return NULL;
3364 }
3365 }
3366
3367 // Being paranoid about accidental sign extension on address
3368 jlong addr = (jlong) ((uintptr_t) address);
3369 // NOTE that package-private DirectByteBuffer constructor currently
3370 // takes int capacity
3371 jint cap = (jint) capacity;
3372 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3373 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3374 return ret;
3375 }
3376
3377 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3378 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3379
3380 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3381 {
3382 // thread_from_jni_environment() will block if VM is gone.
3383 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3384
3385 JNIWrapper("jni_GetDirectBufferAddress");
3386 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3387 void* ret = NULL;
3388 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3389
3390 if (!directBufferSupportInitializeEnded) {
3391 if (!initializeDirectBufferSupport(env, thread)) {
3392 return 0;
3393 }
3394 }
3395
3396 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3397 return 0;
3398 }
3399
3400 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3401 return ret;
3402 }
3403
3404 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3405 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3406
3407 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3408 {
3409 // thread_from_jni_environment() will block if VM is gone.
3410 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3411
3412 JNIWrapper("jni_GetDirectBufferCapacity");
3413 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3414 jlong ret = -1;
3415 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3416
3417 if (!directBufferSupportInitializeEnded) {
3418 if (!initializeDirectBufferSupport(env, thread)) {
3419 ret = 0;
3420 return ret;
3421 }
3422 }
3423
3424 if (buf == NULL) {
3425 return -1;
3426 }
3427
3428 if (!env->IsInstanceOf(buf, directBufferClass)) {
3429 return -1;
3430 }
3431
3432 // NOTE that capacity is currently an int in the implementation
3433 ret = env->GetIntField(buf, bufferCapacityField);
3434 return ret;
3435 }
3436
3437
3438 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3439 JNIWrapper("GetVersion");
3440 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3441 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3442 return CurrentVersion;
3443 JNI_END
3444
3445 extern struct JavaVM_ main_vm;
3446
3447 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3448 JNIWrapper("jni_GetJavaVM");
3449 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3450 *vm = (JavaVM *)(&main_vm);
3451 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3452 return JNI_OK;
3453 JNI_END
3454
3455
3456 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3457 JNIWrapper("GetModule");
3458 return Modules::get_module(clazz, THREAD);
3459 JNI_END
3460
3461
3462 // Structure containing all jni functions
3463 struct JNINativeInterface_ jni_NativeInterface = {
3464 NULL,
3465 NULL,
3466 NULL,
3467
3468 NULL,
3469
3470 jni_GetVersion,
3471
3472 jni_DefineClass,
3473 jni_FindClass,
3474
3475 jni_FromReflectedMethod,
3476 jni_FromReflectedField,
3477
3478 jni_ToReflectedMethod,
3479
3480 jni_GetSuperclass,
3481 jni_IsAssignableFrom,
3482
3483 jni_ToReflectedField,
3484
3485 jni_Throw,
3486 jni_ThrowNew,
3487 jni_ExceptionOccurred,
3488 jni_ExceptionDescribe,
3489 jni_ExceptionClear,
3490 jni_FatalError,
3491
3492 jni_PushLocalFrame,
3493 jni_PopLocalFrame,
3494
3495 jni_NewGlobalRef,
3496 jni_DeleteGlobalRef,
3497 jni_DeleteLocalRef,
3498 jni_IsSameObject,
3499
3500 jni_NewLocalRef,
3501 jni_EnsureLocalCapacity,
3502
3503 jni_AllocObject,
3504 jni_NewObject,
3505 jni_NewObjectV,
3506 jni_NewObjectA,
3507
3508 jni_GetObjectClass,
3509 jni_IsInstanceOf,
3510
3511 jni_GetMethodID,
3512
3513 jni_CallObjectMethod,
3514 jni_CallObjectMethodV,
3515 jni_CallObjectMethodA,
3516 jni_CallBooleanMethod,
3517 jni_CallBooleanMethodV,
3518 jni_CallBooleanMethodA,
3519 jni_CallByteMethod,
3520 jni_CallByteMethodV,
3521 jni_CallByteMethodA,
3522 jni_CallCharMethod,
3523 jni_CallCharMethodV,
3524 jni_CallCharMethodA,
3525 jni_CallShortMethod,
3526 jni_CallShortMethodV,
3527 jni_CallShortMethodA,
3528 jni_CallIntMethod,
3529 jni_CallIntMethodV,
3530 jni_CallIntMethodA,
3531 jni_CallLongMethod,
3532 jni_CallLongMethodV,
3533 jni_CallLongMethodA,
3534 jni_CallFloatMethod,
3535 jni_CallFloatMethodV,
3536 jni_CallFloatMethodA,
3537 jni_CallDoubleMethod,
3538 jni_CallDoubleMethodV,
3539 jni_CallDoubleMethodA,
3540 jni_CallVoidMethod,
3541 jni_CallVoidMethodV,
3542 jni_CallVoidMethodA,
3543
3544 jni_CallNonvirtualObjectMethod,
3545 jni_CallNonvirtualObjectMethodV,
3546 jni_CallNonvirtualObjectMethodA,
3547 jni_CallNonvirtualBooleanMethod,
3548 jni_CallNonvirtualBooleanMethodV,
3549 jni_CallNonvirtualBooleanMethodA,
3550 jni_CallNonvirtualByteMethod,
3551 jni_CallNonvirtualByteMethodV,
3552 jni_CallNonvirtualByteMethodA,
3553 jni_CallNonvirtualCharMethod,
3554 jni_CallNonvirtualCharMethodV,
3555 jni_CallNonvirtualCharMethodA,
3556 jni_CallNonvirtualShortMethod,
3557 jni_CallNonvirtualShortMethodV,
3558 jni_CallNonvirtualShortMethodA,
3559 jni_CallNonvirtualIntMethod,
3560 jni_CallNonvirtualIntMethodV,
3561 jni_CallNonvirtualIntMethodA,
3562 jni_CallNonvirtualLongMethod,
3563 jni_CallNonvirtualLongMethodV,
3564 jni_CallNonvirtualLongMethodA,
3565 jni_CallNonvirtualFloatMethod,
3566 jni_CallNonvirtualFloatMethodV,
3567 jni_CallNonvirtualFloatMethodA,
3568 jni_CallNonvirtualDoubleMethod,
3569 jni_CallNonvirtualDoubleMethodV,
3570 jni_CallNonvirtualDoubleMethodA,
3571 jni_CallNonvirtualVoidMethod,
3572 jni_CallNonvirtualVoidMethodV,
3573 jni_CallNonvirtualVoidMethodA,
3574
3575 jni_GetFieldID,
3576
3577 jni_GetObjectField,
3578 jni_GetBooleanField,
3579 jni_GetByteField,
3580 jni_GetCharField,
3581 jni_GetShortField,
3582 jni_GetIntField,
3583 jni_GetLongField,
3584 jni_GetFloatField,
3585 jni_GetDoubleField,
3586
3587 jni_SetObjectField,
3588 jni_SetBooleanField,
3589 jni_SetByteField,
3590 jni_SetCharField,
3591 jni_SetShortField,
3592 jni_SetIntField,
3593 jni_SetLongField,
3594 jni_SetFloatField,
3595 jni_SetDoubleField,
3596
3597 jni_GetStaticMethodID,
3598
3599 jni_CallStaticObjectMethod,
3600 jni_CallStaticObjectMethodV,
3601 jni_CallStaticObjectMethodA,
3602 jni_CallStaticBooleanMethod,
3603 jni_CallStaticBooleanMethodV,
3604 jni_CallStaticBooleanMethodA,
3605 jni_CallStaticByteMethod,
3606 jni_CallStaticByteMethodV,
3607 jni_CallStaticByteMethodA,
3608 jni_CallStaticCharMethod,
3609 jni_CallStaticCharMethodV,
3610 jni_CallStaticCharMethodA,
3611 jni_CallStaticShortMethod,
3612 jni_CallStaticShortMethodV,
3613 jni_CallStaticShortMethodA,
3614 jni_CallStaticIntMethod,
3615 jni_CallStaticIntMethodV,
3616 jni_CallStaticIntMethodA,
3617 jni_CallStaticLongMethod,
3618 jni_CallStaticLongMethodV,
3619 jni_CallStaticLongMethodA,
3620 jni_CallStaticFloatMethod,
3621 jni_CallStaticFloatMethodV,
3622 jni_CallStaticFloatMethodA,
3623 jni_CallStaticDoubleMethod,
3624 jni_CallStaticDoubleMethodV,
3625 jni_CallStaticDoubleMethodA,
3626 jni_CallStaticVoidMethod,
3627 jni_CallStaticVoidMethodV,
3628 jni_CallStaticVoidMethodA,
3629
3630 jni_GetStaticFieldID,
3631
3632 jni_GetStaticObjectField,
3633 jni_GetStaticBooleanField,
3634 jni_GetStaticByteField,
3635 jni_GetStaticCharField,
3636 jni_GetStaticShortField,
3637 jni_GetStaticIntField,
3638 jni_GetStaticLongField,
3639 jni_GetStaticFloatField,
3640 jni_GetStaticDoubleField,
3641
3642 jni_SetStaticObjectField,
3643 jni_SetStaticBooleanField,
3644 jni_SetStaticByteField,
3645 jni_SetStaticCharField,
3646 jni_SetStaticShortField,
3647 jni_SetStaticIntField,
3648 jni_SetStaticLongField,
3649 jni_SetStaticFloatField,
3650 jni_SetStaticDoubleField,
3651
3652 jni_NewString,
3653 jni_GetStringLength,
3654 jni_GetStringChars,
3655 jni_ReleaseStringChars,
3656
3657 jni_NewStringUTF,
3658 jni_GetStringUTFLength,
3659 jni_GetStringUTFChars,
3660 jni_ReleaseStringUTFChars,
3661
3662 jni_GetArrayLength,
3663
3664 jni_NewObjectArray,
3665 jni_GetObjectArrayElement,
3666 jni_SetObjectArrayElement,
3667
3668 jni_NewBooleanArray,
3669 jni_NewByteArray,
3670 jni_NewCharArray,
3671 jni_NewShortArray,
3672 jni_NewIntArray,
3673 jni_NewLongArray,
3674 jni_NewFloatArray,
3675 jni_NewDoubleArray,
3676
3677 jni_GetBooleanArrayElements,
3678 jni_GetByteArrayElements,
3679 jni_GetCharArrayElements,
3680 jni_GetShortArrayElements,
3681 jni_GetIntArrayElements,
3682 jni_GetLongArrayElements,
3683 jni_GetFloatArrayElements,
3684 jni_GetDoubleArrayElements,
3685
3686 jni_ReleaseBooleanArrayElements,
3687 jni_ReleaseByteArrayElements,
3688 jni_ReleaseCharArrayElements,
3689 jni_ReleaseShortArrayElements,
3690 jni_ReleaseIntArrayElements,
3691 jni_ReleaseLongArrayElements,
3692 jni_ReleaseFloatArrayElements,
3693 jni_ReleaseDoubleArrayElements,
3694
3695 jni_GetBooleanArrayRegion,
3696 jni_GetByteArrayRegion,
3697 jni_GetCharArrayRegion,
3698 jni_GetShortArrayRegion,
3699 jni_GetIntArrayRegion,
3700 jni_GetLongArrayRegion,
3701 jni_GetFloatArrayRegion,
3702 jni_GetDoubleArrayRegion,
3703
3704 jni_SetBooleanArrayRegion,
3705 jni_SetByteArrayRegion,
3706 jni_SetCharArrayRegion,
3707 jni_SetShortArrayRegion,
3708 jni_SetIntArrayRegion,
3709 jni_SetLongArrayRegion,
3710 jni_SetFloatArrayRegion,
3711 jni_SetDoubleArrayRegion,
3712
3713 jni_RegisterNatives,
3714 jni_UnregisterNatives,
3715
3716 jni_MonitorEnter,
3717 jni_MonitorExit,
3718
3719 jni_GetJavaVM,
3720
3721 jni_GetStringRegion,
3722 jni_GetStringUTFRegion,
3723
3724 jni_GetPrimitiveArrayCritical,
3725 jni_ReleasePrimitiveArrayCritical,
3726
3727 jni_GetStringCritical,
3728 jni_ReleaseStringCritical,
3729
3730 jni_NewWeakGlobalRef,
3731 jni_DeleteWeakGlobalRef,
3732
3733 jni_ExceptionCheck,
3734
3735 jni_NewDirectByteBuffer,
3736 jni_GetDirectBufferAddress,
3737 jni_GetDirectBufferCapacity,
3738
3739 // New 1_6 features
3740
3741 jni_GetObjectRefType,
3742
3743 // Module features
3744
3745 jni_GetModule
3746 };
3747
3748
3749 // For jvmti use to modify jni function table.
3750 // Java threads in native contiues to run until it is transitioned
3751 // to VM at safepoint. Before the transition or before it is blocked
3752 // for safepoint it may access jni function table. VM could crash if
3753 // any java thread access the jni function table in the middle of memcpy.
3754 // To avoid this each function pointers are copied automically.
3755 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3756 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3757 intptr_t *a = (intptr_t *) jni_functions();
3758 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3759 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3760 Atomic::store(*b++, a++);
3761 }
3762 }
3763
3764 void quicken_jni_functions() {
3765 // Replace Get<Primitive>Field with fast versions
3766 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3767 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3768 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3769 // windows x86 currently needs SEH wrapper and the gain of the fast
3770 // versions currently isn't certain for server vm on uniprocessor.
3771 && os::is_MP()
3772 #endif
3773 ) {
3774 address func;
3775 func = JNI_FastGetField::generate_fast_get_boolean_field();
3776 if (func != (address)-1) {
3777 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3778 }
3779 func = JNI_FastGetField::generate_fast_get_byte_field();
3780 if (func != (address)-1) {
3781 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3782 }
3783 func = JNI_FastGetField::generate_fast_get_char_field();
3784 if (func != (address)-1) {
3785 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3786 }
3787 func = JNI_FastGetField::generate_fast_get_short_field();
3788 if (func != (address)-1) {
3789 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3790 }
3791 func = JNI_FastGetField::generate_fast_get_int_field();
3792 if (func != (address)-1) {
3793 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3794 }
3795 func = JNI_FastGetField::generate_fast_get_long_field();
3796 if (func != (address)-1) {
3797 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3798 }
3799 func = JNI_FastGetField::generate_fast_get_float_field();
3800 if (func != (address)-1) {
3801 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3802 }
3803 func = JNI_FastGetField::generate_fast_get_double_field();
3804 if (func != (address)-1) {
3805 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3806 }
3807 }
3808 }
3809
3810 // Returns the function structure
3811 struct JNINativeInterface_* jni_functions() {
3812 #if INCLUDE_JNI_CHECK
3813 if (CheckJNICalls) return jni_functions_check();
3814 #endif // INCLUDE_JNI_CHECK
3815 return &jni_NativeInterface;
3816 }
3817
3818 // Returns the function structure
3819 struct JNINativeInterface_* jni_functions_nocheck() {
3820 return &jni_NativeInterface;
3821 }
3822
3823
3824 // Invocation API
3825
3826
3827 // Forward declaration
3828 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3829
3830 // Global invocation API vars
3831 volatile int vm_created = 0;
3832 // Indicate whether it is safe to recreate VM
3833 volatile int safe_to_recreate_vm = 1;
3834 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3835
3836
3837 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3838 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3839
3840 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3841 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3842
3843 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3844 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3845 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3846 jint ret = JNI_ERR;
3847 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3848
3849 if (Threads::is_supported_jni_version(args->version)) {
3850 ret = JNI_OK;
3851 }
3852 // 1.1 style no longer supported in hotspot.
3853 // According the JNI spec, we should update args->version on return.
3854 // We also use the structure to communicate with launcher about default
3855 // stack size.
3856 if (args->version == JNI_VERSION_1_1) {
3857 args->version = JNI_VERSION_1_2;
3858 // javaStackSize is int in arguments structure
3859 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3860 args->javaStackSize = (jint)(ThreadStackSize * K);
3861 }
3862 return ret;
3863 }
3864
3865 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3866 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3867
3868 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3869 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3870
3871 jint result = JNI_ERR;
3872 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3873
3874 // We're about to use Atomic::xchg for synchronization. Some Zero
3875 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3876 // but __sync_lock_test_and_set is not guaranteed to do what we want
3877 // on all architectures. So we check it works before relying on it.
3878 #if defined(ZERO) && defined(ASSERT)
3879 {
3880 jint a = 0xcafebabe;
3881 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3882 void *c = &a;
3883 void *d = Atomic::xchg(&b, &c);
3884 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3885 assert(c == &b && d == &a, "Atomic::xchg() works");
3886 }
3887 #endif // ZERO && ASSERT
3888
3889 // At the moment it's only possible to have one Java VM,
3890 // since some of the runtime state is in global variables.
3891
3892 // We cannot use our mutex locks here, since they only work on
3893 // Threads. We do an atomic compare and exchange to ensure only
3894 // one thread can call this method at a time
3895
3896 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3897 // the add/dec implementations are dependent on whether we are running
3898 // on a multiprocessor, and at this stage of initialization the os::is_MP
3899 // function used to determine this will always return false. Atomic::xchg
3900 // does not have this problem.
3901 if (Atomic::xchg(1, &vm_created) == 1) {
3902 return JNI_EEXIST; // already created, or create attempt in progress
3903 }
3904 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3905 return JNI_ERR; // someone tried and failed and retry not allowed.
3906 }
3907
3908 assert(vm_created == 1, "vm_created is true during the creation");
3909
3910 /**
3911 * Certain errors during initialization are recoverable and do not
3912 * prevent this method from being called again at a later time
3913 * (perhaps with different arguments). However, at a certain
3914 * point during initialization if an error occurs we cannot allow
3915 * this function to be called again (or it will crash). In those
3916 * situations, the 'canTryAgain' flag is set to false, which atomically
3917 * sets safe_to_recreate_vm to 1, such that any new call to
3918 * JNI_CreateJavaVM will immediately fail using the above logic.
3919 */
3920 bool can_try_again = true;
3921
3922 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3923 if (result == JNI_OK) {
3924 JavaThread *thread = JavaThread::current();
3925 assert(!thread->has_pending_exception(), "should have returned not OK");
3926 /* thread is thread_in_vm here */
3927 *vm = (JavaVM *)(&main_vm);
3928 *(JNIEnv**)penv = thread->jni_environment();
3929
3930 #if INCLUDE_JVMCI
3931 if (EnableJVMCI) {
3932 if (UseJVMCICompiler) {
3933 // JVMCI is initialized on a CompilerThread
3934 if (BootstrapJVMCI) {
3935 JavaThread* THREAD = thread;
3936 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3937 compiler->bootstrap(THREAD);
3938 if (HAS_PENDING_EXCEPTION) {
3939 HandleMark hm;
3940 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3941 }
3942 }
3943 }
3944 }
3945 #endif
3946
3947 // Tracks the time application was running before GC
3948 RuntimeService::record_application_start();
3949
3950 // Notify JVMTI
3951 if (JvmtiExport::should_post_thread_life()) {
3952 JvmtiExport::post_thread_start(thread);
3953 }
3954
3955 EventThreadStart event;
3956 if (event.should_commit()) {
3957 event.set_thread(THREAD_TRACE_ID(thread));
3958 event.commit();
3959 }
3960
3961 #ifndef PRODUCT
3962 // Check if we should compile all classes on bootclasspath
3963 if (CompileTheWorld) ClassLoader::compile_the_world();
3964 if (ReplayCompiles) ciReplay::replay(thread);
3965
3966 // Some platforms (like Win*) need a wrapper around these test
3967 // functions in order to properly handle error conditions.
3968 VMError::test_error_handler();
3969 if (ExecuteInternalVMTests) {
3970 InternalVMTests::run();
3971 }
3972 #endif
3973
3974 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3975 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3976 } else {
3977 // If create_vm exits because of a pending exception, exit with that
3978 // exception. In the future when we figure out how to reclaim memory,
3979 // we may be able to exit with JNI_ERR and allow the calling application
3980 // to continue.
3981 if (Universe::is_fully_initialized()) {
3982 // otherwise no pending exception possible - VM will already have aborted
3983 JavaThread* THREAD = JavaThread::current();
3984 if (HAS_PENDING_EXCEPTION) {
3985 HandleMark hm;
3986 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3987 }
3988 }
3989
3990 if (can_try_again) {
3991 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3992 safe_to_recreate_vm = 1;
3993 }
3994
3995 // Creation failed. We must reset vm_created
3996 *vm = 0;
3997 *(JNIEnv**)penv = 0;
3998 // reset vm_created last to avoid race condition. Use OrderAccess to
3999 // control both compiler and architectural-based reordering.
4000 OrderAccess::release_store(&vm_created, 0);
4001 }
4002
4003 // Flush stdout and stderr before exit.
4004 fflush(stdout);
4005 fflush(stderr);
4006
4007 return result;
4008
4009 }
4010
4011 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4012 jint result = JNI_ERR;
4013 // On Windows, let CreateJavaVM run with SEH protection
4014 #ifdef _WIN32
4015 __try {
4016 #endif
4017 result = JNI_CreateJavaVM_inner(vm, penv, args);
4018 #ifdef _WIN32
4019 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4020 // Nothing to do.
4021 }
4022 #endif
4023 return result;
4024 }
4025
4026 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4027 // See bug 4367188, the wrapper can sometimes cause VM crashes
4028 // JNIWrapper("GetCreatedJavaVMs");
4029
4030 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4031
4032 if (vm_created == 1) {
4033 if (numVMs != NULL) *numVMs = 1;
4034 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4035 } else {
4036 if (numVMs != NULL) *numVMs = 0;
4037 }
4038 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4039 return JNI_OK;
4040 }
4041
4042 extern "C" {
4043
4044 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4045 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4046
4047 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4048 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4049 jint res = JNI_ERR;
4050 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4051
4052 if (vm_created == 0) {
4053 res = JNI_ERR;
4054 return res;
4055 }
4056
4057 JNIWrapper("DestroyJavaVM");
4058 JNIEnv *env;
4059 JavaVMAttachArgs destroyargs;
4060 destroyargs.version = CurrentVersion;
4061 destroyargs.name = (char *)"DestroyJavaVM";
4062 destroyargs.group = NULL;
4063 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4064 if (res != JNI_OK) {
4065 return res;
4066 }
4067
4068 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4069 JavaThread* thread = JavaThread::current();
4070 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4071 if (Threads::destroy_vm()) {
4072 // Should not change thread state, VM is gone
4073 vm_created = 0;
4074 res = JNI_OK;
4075 return res;
4076 } else {
4077 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4078 res = JNI_ERR;
4079 return res;
4080 }
4081 }
4082
4083 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4084 jint result = JNI_ERR;
4085 // On Windows, we need SEH protection
4086 #ifdef _WIN32
4087 __try {
4088 #endif
4089 result = jni_DestroyJavaVM_inner(vm);
4090 #ifdef _WIN32
4091 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4092 // Nothing to do.
4093 }
4094 #endif
4095 return result;
4096 }
4097
4098 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4099 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4100
4101 // Check below commented out from JDK1.2fcs as well
4102 /*
4103 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4104 return JNI_EVERSION;
4105 }
4106 */
4107
4108 Thread* t = Thread::current_or_null();
4109 if (t != NULL) {
4110 // If the thread has been attached this operation is a no-op
4111 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4112 return JNI_OK;
4113 }
4114
4115 // Create a thread and mark it as attaching so it will be skipped by the
4116 // ThreadsListEnumerator - see CR 6404306
4117 JavaThread* thread = new JavaThread(true);
4118
4119 // Set correct safepoint info. The thread is going to call into Java when
4120 // initializing the Java level thread object. Hence, the correct state must
4121 // be set in order for the Safepoint code to deal with it correctly.
4122 thread->set_thread_state(_thread_in_vm);
4123 thread->record_stack_base_and_size();
4124 thread->initialize_thread_current();
4125
4126 if (!os::create_attached_thread(thread)) {
4127 thread->smr_delete();
4128 return JNI_ERR;
4129 }
4130 // Enable stack overflow checks
4131 thread->create_stack_guard_pages();
4132
4133 thread->initialize_tlab();
4134
4135 thread->cache_global_variables();
4136
4137 // Crucial that we do not have a safepoint check for this thread, since it has
4138 // not been added to the Thread list yet.
4139 { Threads_lock->lock_without_safepoint_check();
4140 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4141 // avoid this thread trying to do a GC before it is added to the thread-list
4142 thread->set_active_handles(JNIHandleBlock::allocate_block());
4143 Threads::add(thread, daemon);
4144 Threads_lock->unlock();
4145 }
4146 // Create thread group and name info from attach arguments
4147 oop group = NULL;
4148 char* thread_name = NULL;
4149 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4150 group = JNIHandles::resolve(args->group);
4151 thread_name = args->name; // may be NULL
4152 }
4153 if (group == NULL) group = Universe::main_thread_group();
4154
4155 // Create Java level thread object and attach it to this thread
4156 bool attach_failed = false;
4157 {
4158 EXCEPTION_MARK;
4159 HandleMark hm(THREAD);
4160 Handle thread_group(THREAD, group);
4161 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4162 if (HAS_PENDING_EXCEPTION) {
4163 CLEAR_PENDING_EXCEPTION;
4164 // cleanup outside the handle mark.
4165 attach_failed = true;
4166 }
4167 }
4168
4169 if (attach_failed) {
4170 // Added missing cleanup
4171 thread->cleanup_failed_attach_current_thread();
4172 return JNI_ERR;
4173 }
4174
4175 // mark the thread as no longer attaching
4176 // this uses a fence to push the change through so we don't have
4177 // to regrab the threads_lock
4178 thread->set_done_attaching_via_jni();
4179
4180 // Set java thread status.
4181 java_lang_Thread::set_thread_status(thread->threadObj(),
4182 java_lang_Thread::RUNNABLE);
4183
4184 // Notify the debugger
4185 if (JvmtiExport::should_post_thread_life()) {
4186 JvmtiExport::post_thread_start(thread);
4187 }
4188
4189 EventThreadStart event;
4190 if (event.should_commit()) {
4191 event.set_thread(THREAD_TRACE_ID(thread));
4192 event.commit();
4193 }
4194
4195 *(JNIEnv**)penv = thread->jni_environment();
4196
4197 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4198 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4199 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4200 // needed.
4201
4202 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4203
4204 // Perform any platform dependent FPU setup
4205 os::setup_fpu();
4206
4207 return JNI_OK;
4208 }
4209
4210
4211 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4212 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4213 if (vm_created == 0) {
4214 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4215 return JNI_ERR;
4216 }
4217
4218 JNIWrapper("AttachCurrentThread");
4219 jint ret = attach_current_thread(vm, penv, _args, false);
4220 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4221 return ret;
4222 }
4223
4224
4225 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4226 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4227 VM_Exit::block_if_vm_exited();
4228
4229 JNIWrapper("DetachCurrentThread");
4230
4231 // If the thread has already been detached the operation is a no-op
4232 if (Thread::current_or_null() == NULL) {
4233 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4234 return JNI_OK;
4235 }
4236
4237 JavaThread* thread = JavaThread::current();
4238 if (thread->has_last_Java_frame()) {
4239 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4240 // Can't detach a thread that's running java, that can't work.
4241 return JNI_ERR;
4242 }
4243
4244 // Safepoint support. Have to do call-back to safepoint code, if in the
4245 // middel of a safepoint operation
4246 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4247
4248 // XXX: Note that JavaThread::exit() call below removes the guards on the
4249 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4250 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4251 // of the guards is visible in jni_AttachCurrentThread above,
4252 // the removal of the guards is buried below in JavaThread::exit()
4253 // here. The abstraction should be more symmetrically either exposed
4254 // or hidden (e.g. it could probably be hidden in the same
4255 // (platform-dependent) methods where we do alternate stack
4256 // maintenance work?)
4257 thread->exit(false, JavaThread::jni_detach);
4258 thread->smr_delete();
4259
4260 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4261 return JNI_OK;
4262 }
4263
4264 DT_RETURN_MARK_DECL(GetEnv, jint
4265 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4266
4267 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4268 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4269 jint ret = JNI_ERR;
4270 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4271
4272 if (vm_created == 0) {
4273 *penv = NULL;
4274 ret = JNI_EDETACHED;
4275 return ret;
4276 }
4277
4278 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4279 return ret;
4280 }
4281
4282 #ifndef JVMPI_VERSION_1
4283 // need these in order to be polite about older agents
4284 #define JVMPI_VERSION_1 ((jint)0x10000001)
4285 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4286 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4287 #endif // !JVMPI_VERSION_1
4288
4289 Thread* thread = Thread::current_or_null();
4290 if (thread != NULL && thread->is_Java_thread()) {
4291 if (Threads::is_supported_jni_version_including_1_1(version)) {
4292 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4293 ret = JNI_OK;
4294 return ret;
4295
4296 } else if (version == JVMPI_VERSION_1 ||
4297 version == JVMPI_VERSION_1_1 ||
4298 version == JVMPI_VERSION_1_2) {
4299 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4300 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4301 ret = JNI_EVERSION;
4302 return ret;
4303 } else if (JvmtiExport::is_jvmdi_version(version)) {
4304 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4305 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4306 ret = JNI_EVERSION;
4307 return ret;
4308 } else {
4309 *penv = NULL;
4310 ret = JNI_EVERSION;
4311 return ret;
4312 }
4313 } else {
4314 *penv = NULL;
4315 ret = JNI_EDETACHED;
4316 return ret;
4317 }
4318 }
4319
4320
4321 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4322 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4323 if (vm_created == 0) {
4324 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4325 return JNI_ERR;
4326 }
4327
4328 JNIWrapper("AttachCurrentThreadAsDaemon");
4329 jint ret = attach_current_thread(vm, penv, _args, true);
4330 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4331 return ret;
4332 }
4333
4334
4335 } // End extern "C"
4336
4337 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4338 NULL,
4339 NULL,
4340 NULL,
4341
4342 jni_DestroyJavaVM,
4343 jni_AttachCurrentThread,
4344 jni_DetachCurrentThread,
4345 jni_GetEnv,
4346 jni_AttachCurrentThreadAsDaemon
4347 };