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/arrayOop.inline.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceOop.hpp"
50 #include "oops/markOop.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "oops/typeArrayKlass.hpp"
57 #include "oops/typeArrayOop.inline.hpp"
58 #include "prims/jniCheck.hpp"
59 #include "prims/jniExport.hpp"
60 #include "prims/jniFastGetField.hpp"
61 #include "prims/jvm_misc.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/jvmtiThreadState.hpp"
64 #include "runtime/atomic.hpp"
65 #include "runtime/compilationPolicy.hpp"
66 #include "runtime/fieldDescriptor.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/interfaceSupport.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jfieldIDWorkaround.hpp"
72 #include "runtime/jniHandles.inline.hpp"
73 #include "runtime/orderAccess.inline.hpp"
74 #include "runtime/reflection.hpp"
75 #include "runtime/sharedRuntime.hpp"
76 #include "runtime/signature.hpp"
77 #include "runtime/thread.inline.hpp"
78 #include "runtime/vm_operations.hpp"
79 #include "services/memTracker.hpp"
80 #include "services/runtimeService.hpp"
81 #include "trace/traceMacros.hpp"
82 #include "trace/tracing.hpp"
83 #include "utilities/defaultStream.hpp"
84 #include "utilities/dtrace.hpp"
85 #include "utilities/events.hpp"
86 #include "utilities/histogram.hpp"
87 #include "utilities/internalVMTests.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/vmError.hpp"
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_10;
96
97 #ifdef _WIN32
98 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
99 #endif
100
101 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
102 // '-return' probe regardless of the return path is taken out of the function.
103 // Methods that have multiple return paths use this to avoid having to
104 // instrument each return path. Methods that use CHECK or THROW must use this
105 // since those macros can cause an immedate uninstrumented return.
106 //
107 // In order to get the return value, a reference to the variable containing
108 // the return value must be passed to the contructor of the object, and
109 // the return value must be set before return (since the mark object has
110 // a reference to it).
111 //
112 // Example:
113 // DT_RETURN_MARK_DECL(SomeFunc, int);
114 // JNI_ENTRY(int, SomeFunc, ...)
115 // int return_value = 0;
116 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
117 // foo(CHECK_0)
118 // return_value = 5;
119 // return return_value;
120 // JNI_END
121 #define DT_RETURN_MARK_DECL(name, type, probe) \
122 DTRACE_ONLY( \
123 class DTraceReturnProbeMark_##name { \
124 public: \
125 const type& _ret_ref; \
126 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132 // Void functions are simpler since there's no return value
133 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
134 DTRACE_ONLY( \
135 class DTraceReturnProbeMark_##name { \
136 public: \
137 ~DTraceReturnProbeMark_##name() { \
138 probe; \
139 } \
140 } \
141 )
142
143 // Place these macros in the function to mark the return. Non-void
144 // functions need the type and address of the return value.
145 #define DT_RETURN_MARK(name, type, ref) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
147 #define DT_VOID_RETURN_MARK(name) \
148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
149
150
151 // Use these to select distinct code for floating-point vs. non-floating point
152 // situations. Used from within common macros where we need slightly
153 // different behavior for Float/Double
154 #define FP_SELECT_Boolean(intcode, fpcode) intcode
155 #define FP_SELECT_Byte(intcode, fpcode) intcode
156 #define FP_SELECT_Char(intcode, fpcode) intcode
157 #define FP_SELECT_Short(intcode, fpcode) intcode
158 #define FP_SELECT_Object(intcode, fpcode) intcode
159 #define FP_SELECT_Int(intcode, fpcode) intcode
160 #define FP_SELECT_Long(intcode, fpcode) intcode
161 #define FP_SELECT_Float(intcode, fpcode) fpcode
162 #define FP_SELECT_Double(intcode, fpcode) fpcode
163 #define FP_SELECT(TypeName, intcode, fpcode) \
164 FP_SELECT_##TypeName(intcode, fpcode)
165
166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(NoSafepointVerifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(NoSafepointVerifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Wrapper to trace JNI functions
263
264 #ifdef ASSERT
265 Histogram* JNIHistogram;
266 static volatile int JNIHistogram_lock = 0;
267
268 class JNIHistogramElement : public HistogramElement {
269 public:
270 JNIHistogramElement(const char* name);
271 };
272
273 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
274 _name = elementName;
275 uintx count = 0;
276
277 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
278 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
279 count +=1;
280 if ( (WarnOnStalledSpinLock > 0)
281 && (count % WarnOnStalledSpinLock == 0)) {
282 warning("JNIHistogram_lock seems to be stalled");
283 }
284 }
285 }
286
287
288 if(JNIHistogram == NULL)
289 JNIHistogram = new Histogram("JNI Call Counts",100);
290
291 JNIHistogram->add_element(this);
292 Atomic::dec(&JNIHistogram_lock);
293 }
294
295 #define JNICountWrapper(arg) \
296 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
297 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
298 if (e != NULL) e->increment_count()
299 #define JNIWrapper(arg) JNICountWrapper(arg);
300 #else
301 #define JNIWrapper(arg)
302 #endif
303
304
305 // Implementation of JNI entries
306
307 DT_RETURN_MARK_DECL(DefineClass, jclass
308 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
309
310 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
311 const jbyte *buf, jsize bufLen))
312 JNIWrapper("DefineClass");
313
314 HOTSPOT_JNI_DEFINECLASS_ENTRY(
315 env, (char*) name, loaderRef, (char*) buf, bufLen);
316
317 jclass cls = NULL;
318 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
319
320 TempNewSymbol class_name = NULL;
321 // Since exceptions can be thrown, class initialization can take place
322 // if name is NULL no check for class name in .class stream has to be made.
323 if (name != NULL) {
324 const int str_len = (int)strlen(name);
325 if (str_len > Symbol::max_length()) {
326 // It's impossible to create this class; the name cannot fit
327 // into the constant pool.
328 Exceptions::fthrow(THREAD_AND_LOCATION,
329 vmSymbols::java_lang_NoClassDefFoundError(),
330 "Class name exceeds maximum length of %d: %s",
331 Symbol::max_length(),
332 name);
333 return 0;
334 }
335 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
336 }
337 ResourceMark rm(THREAD);
338 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
340
341 if (UsePerfData && !class_loader.is_null()) {
342 // check whether the current caller thread holds the lock or not.
343 // If not, increment the corresponding counter
344 if (ObjectSynchronizer::
345 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
346 ObjectSynchronizer::owner_self) {
347 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
348 }
349 }
350 Klass* k = SystemDictionary::resolve_from_stream(class_name,
351 class_loader,
352 Handle(),
353 &st,
354 CHECK_NULL);
355
356 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
357 trace_class_resolution(k);
358 }
359
360 cls = (jclass)JNIHandles::make_local(
361 env, k->java_mirror());
362 return cls;
363 JNI_END
364
365
366
367 static bool first_time_FindClass = true;
368
369 DT_RETURN_MARK_DECL(FindClass, jclass
370 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
371
372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
373 JNIWrapper("FindClass");
374
375 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
376
377 jclass result = NULL;
378 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
379
380 // Remember if we are the first invocation of jni_FindClass
381 bool first_time = first_time_FindClass;
382 first_time_FindClass = false;
383
384 // Sanity check the name: it cannot be null or larger than the maximum size
385 // name we can fit in the constant pool.
386 if (name == NULL) {
387 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
388 }
389 if ((int)strlen(name) > Symbol::max_length()) {
390 Exceptions::fthrow(THREAD_AND_LOCATION,
391 vmSymbols::java_lang_NoClassDefFoundError(),
392 "Class name exceeds maximum length of %d: %s",
393 Symbol::max_length(),
394 name);
395 return 0;
396 }
397
398 //%note jni_3
399 Handle protection_domain;
400 // Find calling class
401 Klass* k = thread->security_get_caller_class(0);
402 // default to the system loader when no context
403 Handle loader(THREAD, SystemDictionary::java_system_loader());
404 if (k != NULL) {
405 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
406 // in the correct class context.
407 if (k->class_loader() == NULL &&
408 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
409 JavaValue result(T_OBJECT);
410 JavaCalls::call_static(&result, k,
411 vmSymbols::getFromClass_name(),
412 vmSymbols::void_class_signature(),
413 CHECK_NULL);
414 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
415 // a non-NULL Class object. When invoked from JNI_OnUnload,
416 // it will return NULL to indicate no context.
417 oop mirror = (oop) result.get_jobject();
418 if (mirror != NULL) {
419 Klass* fromClass = java_lang_Class::as_Klass(mirror);
420 loader = Handle(THREAD, fromClass->class_loader());
421 protection_domain = Handle(THREAD, fromClass->protection_domain());
422 }
423 } else {
424 loader = Handle(THREAD, k->class_loader());
425 }
426 }
427
428 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
429 result = find_class_from_class_loader(env, sym, true, loader,
430 protection_domain, true, thread);
431
432 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
433 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
434 }
435
436 // If we were the first invocation of jni_FindClass, we enable compilation again
437 // rather than just allowing invocation counter to overflow and decay.
438 // Controlled by flag DelayCompilationDuringStartup.
439 if (first_time && !CompileTheWorld)
440 CompilationPolicy::completed_vm_startup();
441
442 return result;
443 JNI_END
444
445 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
446 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
447
448 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
449 JNIWrapper("FromReflectedMethod");
450
451 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
452
453 jmethodID ret = NULL;
454 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
455
456 // method is a handle to a java.lang.reflect.Method object
457 oop reflected = JNIHandles::resolve_non_null(method);
458 oop mirror = NULL;
459 int slot = 0;
460
461 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
462 mirror = java_lang_reflect_Constructor::clazz(reflected);
463 slot = java_lang_reflect_Constructor::slot(reflected);
464 } else {
465 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
466 mirror = java_lang_reflect_Method::clazz(reflected);
467 slot = java_lang_reflect_Method::slot(reflected);
468 }
469 Klass* k1 = java_lang_Class::as_Klass(mirror);
470
471 // Make sure class is initialized before handing id's out to methods
472 k1->initialize(CHECK_NULL);
473 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
474 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
475 return ret;
476 JNI_END
477
478 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
479 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
480
481 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
482 JNIWrapper("FromReflectedField");
483
484 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
485
486 jfieldID ret = NULL;
487 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
488
489 // field is a handle to a java.lang.reflect.Field object
490 oop reflected = JNIHandles::resolve_non_null(field);
491 oop mirror = java_lang_reflect_Field::clazz(reflected);
492 Klass* k1 = java_lang_Class::as_Klass(mirror);
493 int slot = java_lang_reflect_Field::slot(reflected);
494 int modifiers = java_lang_reflect_Field::modifiers(reflected);
495
496 // Make sure class is initialized before handing id's out to fields
497 k1->initialize(CHECK_NULL);
498
499 // First check if this is a static field
500 if (modifiers & JVM_ACC_STATIC) {
501 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
502 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
503 assert(id != NULL, "corrupt Field object");
504 debug_only(id->set_is_static_field_id();)
505 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
506 ret = jfieldIDWorkaround::to_static_jfieldID(id);
507 return ret;
508 }
509
510 // The slot is the index of the field description in the field-array
511 // The jfieldID is the offset of the field within the object
512 // It may also have hash bits for k, if VerifyJNIFields is turned on.
513 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
514 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
515 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
516 return ret;
517 JNI_END
518
519
520 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
521 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
522
523 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
524 JNIWrapper("ToReflectedMethod");
525
526 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
527
528 jobject ret = NULL;
529 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
530
531 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
532 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
533 oop reflection_method;
534 if (m->is_initializer()) {
535 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
536 } else {
537 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
538 }
539 ret = JNIHandles::make_local(env, reflection_method);
540 return ret;
541 JNI_END
542
543 DT_RETURN_MARK_DECL(GetSuperclass, jclass
544 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
545
546 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
547 JNIWrapper("GetSuperclass");
548
549 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
550
551 jclass obj = NULL;
552 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
553
554 oop mirror = JNIHandles::resolve_non_null(sub);
555 // primitive classes return NULL
556 if (java_lang_Class::is_primitive(mirror)) return NULL;
557
558 // Rules of Class.getSuperClass as implemented by KLass::java_super:
559 // arrays return Object
560 // interfaces return NULL
561 // proper classes return Klass::super()
562 Klass* k = java_lang_Class::as_Klass(mirror);
563 if (k->is_interface()) return NULL;
564
565 // return mirror for superclass
566 Klass* super = k->java_super();
567 // super2 is the value computed by the compiler's getSuperClass intrinsic:
568 debug_only(Klass* super2 = ( k->is_array_klass()
569 ? SystemDictionary::Object_klass()
570 : k->super() ) );
571 assert(super == super2,
572 "java_super computation depends on interface, array, other super");
573 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
574 return obj;
575 JNI_END
576
577 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
578 JNIWrapper("IsSubclassOf");
579
580 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
581
582 oop sub_mirror = JNIHandles::resolve_non_null(sub);
583 oop super_mirror = JNIHandles::resolve_non_null(super);
584 if (java_lang_Class::is_primitive(sub_mirror) ||
585 java_lang_Class::is_primitive(super_mirror)) {
586 jboolean ret = (sub_mirror == super_mirror);
587
588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
589 return ret;
590 }
591 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
592 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
593 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
594 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
595 JNI_TRUE : JNI_FALSE;
596
597 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
598 return ret;
599 JNI_END
600
601
602 DT_RETURN_MARK_DECL(Throw, jint
603 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
604
605 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
606 JNIWrapper("Throw");
607
608 HOTSPOT_JNI_THROW_ENTRY(env, obj);
609
610 jint ret = JNI_OK;
611 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
612
613 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
614 ShouldNotReachHere();
615 return 0; // Mute compiler.
616 JNI_END
617
618
619 DT_RETURN_MARK_DECL(ThrowNew, jint
620 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
621
622 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
623 JNIWrapper("ThrowNew");
624
625 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
626
627 jint ret = JNI_OK;
628 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
629
630 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
631 Symbol* name = k->name();
632 Handle class_loader (THREAD, k->class_loader());
633 Handle protection_domain (THREAD, k->protection_domain());
634 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
635 ShouldNotReachHere();
636 return 0; // Mute compiler.
637 JNI_END
638
639
640 // JNI functions only transform a pending async exception to a synchronous
641 // exception in ExceptionOccurred and ExceptionCheck calls, since
642 // delivering an async exception in other places won't change the native
643 // code's control flow and would be harmful when native code further calls
644 // JNI functions with a pending exception. Async exception is also checked
645 // during the call, so ExceptionOccurred/ExceptionCheck won't return
646 // false but deliver the async exception at the very end during
647 // state transition.
648
649 static void jni_check_async_exceptions(JavaThread *thread) {
650 assert(thread == Thread::current(), "must be itself");
651 thread->check_and_handle_async_exceptions();
652 }
653
654 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
655 JNIWrapper("ExceptionOccurred");
656
657 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
658
659 jni_check_async_exceptions(thread);
660 oop exception = thread->pending_exception();
661 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
662
663 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
664 return ret;
665 JNI_END
666
667
668 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
669 JNIWrapper("ExceptionDescribe");
670
671 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
672
673 if (thread->has_pending_exception()) {
674 Handle ex(thread, thread->pending_exception());
675 thread->clear_pending_exception();
676 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
677 // Don't print anything if we are being killed.
678 } else {
679 jio_fprintf(defaultStream::error_stream(), "Exception ");
680 if (thread != NULL && thread->threadObj() != NULL) {
681 ResourceMark rm(THREAD);
682 jio_fprintf(defaultStream::error_stream(),
683 "in thread \"%s\" ", thread->get_thread_name());
684 }
685 if (ex->is_a(SystemDictionary::Throwable_klass())) {
686 JavaValue result(T_VOID);
687 JavaCalls::call_virtual(&result,
688 ex,
689 SystemDictionary::Throwable_klass(),
690 vmSymbols::printStackTrace_name(),
691 vmSymbols::void_method_signature(),
692 THREAD);
693 // If an exception is thrown in the call it gets thrown away. Not much
694 // we can do with it. The native code that calls this, does not check
695 // for the exception - hence, it might still be in the thread when DestroyVM gets
696 // called, potentially causing a few asserts to trigger - since no pending exception
697 // is expected.
698 CLEAR_PENDING_EXCEPTION;
699 } else {
700 ResourceMark rm(THREAD);
701 jio_fprintf(defaultStream::error_stream(),
702 ". Uncaught exception of type %s.",
703 ex->klass()->external_name());
704 }
705 }
706 }
707
708 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
709 JNI_END
710
711
712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
713 JNIWrapper("ExceptionClear");
714
715 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
716
717 // The jni code might be using this API to clear java thrown exception.
718 // So just mark jvmti thread exception state as exception caught.
719 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
720 if (state != NULL && state->is_exception_detected()) {
721 state->set_exception_caught();
722 }
723 thread->clear_pending_exception();
724
725 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
726 JNI_END
727
728
729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
730 JNIWrapper("FatalError");
731
732 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
733
734 tty->print_cr("FATAL ERROR in native method: %s", msg);
735 thread->print_stack();
736 os::abort(); // Dump core and abort
737 JNI_END
738
739
740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
741 JNIWrapper("PushLocalFrame");
742
743 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
744
745 //%note jni_11
746 if (capacity < 0 ||
747 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
748 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
749 return JNI_ERR;
750 }
751 JNIHandleBlock* old_handles = thread->active_handles();
752 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
753 assert(new_handles != NULL, "should not be NULL");
754 new_handles->set_pop_frame_link(old_handles);
755 thread->set_active_handles(new_handles);
756 jint ret = JNI_OK;
757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
758 return ret;
759 JNI_END
760
761
762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
763 JNIWrapper("PopLocalFrame");
764
765 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
766
767 //%note jni_11
768 Handle result_handle(thread, JNIHandles::resolve(result));
769 JNIHandleBlock* old_handles = thread->active_handles();
770 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
771 if (new_handles != NULL) {
772 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
773 // This way code will still work if PopLocalFrame is called without a corresponding
774 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
775 // the release_block call will release the blocks.
776 thread->set_active_handles(new_handles);
777 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
778 JNIHandleBlock::release_block(old_handles, thread); // may block
779 result = JNIHandles::make_local(thread, result_handle());
780 }
781 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
782 return result;
783 JNI_END
784
785
786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
787 JNIWrapper("NewGlobalRef");
788
789 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
790
791 Handle ref_handle(thread, JNIHandles::resolve(ref));
792 jobject ret = JNIHandles::make_global(ref_handle);
793
794 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
795 return ret;
796 JNI_END
797
798 // Must be JNI_ENTRY (with HandleMark)
799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
800 JNIWrapper("DeleteGlobalRef");
801
802 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
803
804 JNIHandles::destroy_global(ref);
805
806 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
807 JNI_END
808
809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
810 JNIWrapper("DeleteLocalRef");
811
812 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
813
814 JNIHandles::destroy_local(obj);
815
816 HOTSPOT_JNI_DELETELOCALREF_RETURN();
817 JNI_END
818
819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
820 JNIWrapper("IsSameObject");
821
822 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
823
824 oop a = JNIHandles::resolve(r1);
825 oop b = JNIHandles::resolve(r2);
826 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
827
828 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
829 return ret;
830 JNI_END
831
832
833 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
834 JNIWrapper("NewLocalRef");
835
836 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
837
838 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
839
840 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
841 return ret;
842 JNI_END
843
844 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
845 JNIWrapper("EnsureLocalCapacity");
846
847 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
848
849 jint ret;
850 if (capacity >= 0 &&
851 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
852 ret = JNI_OK;
853 } else {
854 ret = JNI_ERR;
855 }
856
857 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
858 return ret;
859 JNI_END
860
861 // Return the Handle Type
862 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
863 JNIWrapper("GetObjectRefType");
864
865 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
866
867 jobjectRefType ret = JNIInvalidRefType;
868 if (obj != NULL) {
869 ret = JNIHandles::handle_type(thread, obj);
870 }
871
872 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
873 return ret;
874 JNI_END
875
876
877 class JNI_ArgumentPusher : public SignatureIterator {
878 protected:
879 JavaCallArguments* _arguments;
880
881 virtual void get_bool () = 0;
882 virtual void get_char () = 0;
883 virtual void get_short () = 0;
884 virtual void get_byte () = 0;
885 virtual void get_int () = 0;
886 virtual void get_long () = 0;
887 virtual void get_float () = 0;
888 virtual void get_double () = 0;
889 virtual void get_object () = 0;
890
891 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
892 this->_return_type = T_ILLEGAL;
893 _arguments = NULL;
894 }
895
896 public:
897 virtual void iterate( uint64_t fingerprint ) = 0;
898
899 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
900
901 inline void do_bool() { if (!is_return_type()) get_bool(); }
902 inline void do_char() { if (!is_return_type()) get_char(); }
903 inline void do_short() { if (!is_return_type()) get_short(); }
904 inline void do_byte() { if (!is_return_type()) get_byte(); }
905 inline void do_int() { if (!is_return_type()) get_int(); }
906 inline void do_long() { if (!is_return_type()) get_long(); }
907 inline void do_float() { if (!is_return_type()) get_float(); }
908 inline void do_double() { if (!is_return_type()) get_double(); }
909 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
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
942 inline void set_ap(va_list rap) {
943 va_copy(_ap, rap);
944 }
945
946 public:
947 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
948 : JNI_ArgumentPusher(signature) {
949 set_ap(rap);
950 }
951 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
952 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
953 set_ap(rap);
954 }
955
956 // Optimized path if we have the bitvector form of signature
957 void iterate( uint64_t fingerprint ) {
958 if (fingerprint == (uint64_t)CONST64(-1)) {
959 SignatureIterator::iterate(); // Must be too many arguments
960 } else {
961 _return_type = (BasicType)((fingerprint >> static_feature_size) &
962 result_feature_mask);
963
964 assert(fingerprint, "Fingerprint should not be 0");
965 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
966 while ( 1 ) {
967 switch ( fingerprint & parameter_feature_mask ) {
968 case bool_parm:
969 get_bool();
970 break;
971 case char_parm:
972 get_char();
973 break;
974 case short_parm:
975 get_short();
976 break;
977 case byte_parm:
978 get_byte();
979 break;
980 case int_parm:
981 get_int();
982 break;
983 case obj_parm:
984 get_object();
985 break;
986 case long_parm:
987 get_long();
988 break;
989 case float_parm:
990 get_float();
991 break;
992 case double_parm:
993 get_double();
994 break;
995 case done_parm:
996 return;
997 break;
998 default:
999 ShouldNotReachHere();
1000 break;
1001 }
1002 fingerprint >>= parameter_feature_size;
1003 }
1004 }
1005 }
1006 };
1007
1008
1009 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1010 protected:
1011 const jvalue *_ap;
1012
1013 inline void get_bool() {
1014 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1015 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1016 // TemplateInterpreterGenerator::generate_result_handler_for and
1017 // SharedRuntime::generate_native_wrapper.
1018 jboolean b = (_ap++)->z;
1019 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1020 }
1021 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1022 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1023 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1024 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1025
1026 inline void get_long() { _arguments->push_long((_ap++)->j); }
1027 inline void get_float() { _arguments->push_float((_ap++)->f); }
1028 inline void get_double() { _arguments->push_double((_ap++)->d);}
1029 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1030
1031 inline void set_ap(const jvalue *rap) { _ap = rap; }
1032
1033 public:
1034 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1035 : JNI_ArgumentPusher(signature) {
1036 set_ap(rap);
1037 }
1038 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1039 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1040 set_ap(rap);
1041 }
1042
1043 // Optimized path if we have the bitvector form of signature
1044 void iterate( uint64_t fingerprint ) {
1045 if (fingerprint == (uint64_t)CONST64(-1)) {
1046 SignatureIterator::iterate(); // Must be too many arguments
1047 } else {
1048 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1049 result_feature_mask);
1050 assert(fingerprint, "Fingerprint should not be 0");
1051 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1052 while ( 1 ) {
1053 switch ( fingerprint & parameter_feature_mask ) {
1054 case bool_parm:
1055 get_bool();
1056 break;
1057 case char_parm:
1058 get_char();
1059 break;
1060 case short_parm:
1061 get_short();
1062 break;
1063 case byte_parm:
1064 get_byte();
1065 break;
1066 case int_parm:
1067 get_int();
1068 break;
1069 case obj_parm:
1070 get_object();
1071 break;
1072 case long_parm:
1073 get_long();
1074 break;
1075 case float_parm:
1076 get_float();
1077 break;
1078 case double_parm:
1079 get_double();
1080 break;
1081 case done_parm:
1082 return;
1083 break;
1084 default:
1085 ShouldNotReachHere();
1086 break;
1087 }
1088 fingerprint >>= parameter_feature_size;
1089 }
1090 }
1091 }
1092 };
1093
1094
1095 enum JNICallType {
1096 JNI_STATIC,
1097 JNI_VIRTUAL,
1098 JNI_NONVIRTUAL
1099 };
1100
1101
1102
1103 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1104 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1105
1106 // Create object to hold arguments for the JavaCall, and associate it with
1107 // the jni parser
1108 ResourceMark rm(THREAD);
1109 int number_of_parameters = method->size_of_parameters();
1110 JavaCallArguments java_args(number_of_parameters);
1111 args->set_java_argument_object(&java_args);
1112
1113 assert(method->is_static(), "method should be static");
1114
1115 // Fill out JavaCallArguments object
1116 args->iterate( Fingerprinter(method).fingerprint() );
1117 // Initialize result type
1118 result->set_type(args->get_ret_type());
1119
1120 // Invoke the method. Result is returned as oop.
1121 JavaCalls::call(result, method, &java_args, CHECK);
1122
1123 // Convert result
1124 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1125 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1126 }
1127 }
1128
1129
1130 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1131 oop recv = JNIHandles::resolve(receiver);
1132 if (recv == NULL) {
1133 THROW(vmSymbols::java_lang_NullPointerException());
1134 }
1135 Handle h_recv(THREAD, recv);
1136
1137 int number_of_parameters;
1138 Method* selected_method;
1139 {
1140 Method* m = Method::resolve_jmethod_id(method_id);
1141 number_of_parameters = m->size_of_parameters();
1142 Klass* holder = m->method_holder();
1143 if (call_type != JNI_VIRTUAL) {
1144 selected_method = m;
1145 } else if (!m->has_itable_index()) {
1146 // non-interface call -- for that little speed boost, don't handlize
1147 debug_only(NoSafepointVerifier nosafepoint;)
1148 // jni_GetMethodID makes sure class is linked and initialized
1149 // so m should have a valid vtable index.
1150 assert(m->valid_vtable_index(), "no valid vtable index");
1151 int vtbl_index = m->vtable_index();
1152 if (vtbl_index != Method::nonvirtual_vtable_index) {
1153 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1154 } else {
1155 // final method
1156 selected_method = m;
1157 }
1158 } else {
1159 // interface call
1160 int itbl_index = m->itable_index();
1161 Klass* k = h_recv->klass();
1162 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1163 }
1164 }
1165
1166 methodHandle method(THREAD, selected_method);
1167
1168 // Create object to hold arguments for the JavaCall, and associate it with
1169 // the jni parser
1170 ResourceMark rm(THREAD);
1171 JavaCallArguments java_args(number_of_parameters);
1172 args->set_java_argument_object(&java_args);
1173
1174 // handle arguments
1175 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1176 args->push_receiver(h_recv); // Push jobject handle
1177
1178 // Fill out JavaCallArguments object
1179 args->iterate( Fingerprinter(method).fingerprint() );
1180 // Initialize result type
1181 result->set_type(args->get_ret_type());
1182
1183 // Invoke the method. Result is returned as oop.
1184 JavaCalls::call(result, method, &java_args, CHECK);
1185
1186 // Convert result
1187 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1188 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1189 }
1190 }
1191
1192
1193 static instanceOop alloc_object(jclass clazz, TRAPS) {
1194 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1195 if (k == NULL) {
1196 ResourceMark rm(THREAD);
1197 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1198 }
1199 k->check_valid_for_instantiation(false, CHECK_NULL);
1200 k->initialize(CHECK_NULL);
1201 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1202 return ih;
1203 }
1204
1205 DT_RETURN_MARK_DECL(AllocObject, jobject
1206 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1207
1208 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1209 JNIWrapper("AllocObject");
1210
1211 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1212
1213 jobject ret = NULL;
1214 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1215
1216 instanceOop i = alloc_object(clazz, CHECK_NULL);
1217 ret = JNIHandles::make_local(env, i);
1218 return ret;
1219 JNI_END
1220
1221 DT_RETURN_MARK_DECL(NewObjectA, jobject
1222 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1223
1224 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1225 JNIWrapper("NewObjectA");
1226
1227 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1228
1229 jobject obj = NULL;
1230 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1231
1232 instanceOop i = alloc_object(clazz, CHECK_NULL);
1233 obj = JNIHandles::make_local(env, i);
1234 JavaValue jvalue(T_VOID);
1235 JNI_ArgumentPusherArray ap(methodID, args);
1236 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1237 return obj;
1238 JNI_END
1239
1240
1241 DT_RETURN_MARK_DECL(NewObjectV, jobject
1242 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1243
1244 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1245 JNIWrapper("NewObjectV");
1246
1247 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1248
1249 jobject obj = NULL;
1250 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1251
1252 instanceOop i = alloc_object(clazz, CHECK_NULL);
1253 obj = JNIHandles::make_local(env, i);
1254 JavaValue jvalue(T_VOID);
1255 JNI_ArgumentPusherVaArg ap(methodID, args);
1256 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1257 return obj;
1258 JNI_END
1259
1260
1261 DT_RETURN_MARK_DECL(NewObject, jobject
1262 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1263
1264 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1265 JNIWrapper("NewObject");
1266
1267 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1268
1269 jobject obj = NULL;
1270 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1271
1272 instanceOop i = alloc_object(clazz, CHECK_NULL);
1273 obj = JNIHandles::make_local(env, i);
1274 va_list args;
1275 va_start(args, methodID);
1276 JavaValue jvalue(T_VOID);
1277 JNI_ArgumentPusherVaArg ap(methodID, args);
1278 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1279 va_end(args);
1280 return obj;
1281 JNI_END
1282
1283
1284 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1285 JNIWrapper("GetObjectClass");
1286
1287 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1288
1289 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1290 jclass ret =
1291 (jclass) JNIHandles::make_local(env, k->java_mirror());
1292
1293 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1294 return ret;
1295 JNI_END
1296
1297 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1298 JNIWrapper("IsInstanceOf");
1299
1300 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1301
1302 jboolean ret = JNI_TRUE;
1303 if (obj != NULL) {
1304 ret = JNI_FALSE;
1305 Klass* k = java_lang_Class::as_Klass(
1306 JNIHandles::resolve_non_null(clazz));
1307 if (k != NULL) {
1308 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1309 }
1310 }
1311
1312 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1313 return ret;
1314 JNI_END
1315
1316
1317 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1318 const char *sig, bool is_static, TRAPS) {
1319 // %%%% This code should probably just call into a method in the LinkResolver
1320 //
1321 // The class should have been loaded (we have an instance of the class
1322 // passed in) so the method and signature should already be in the symbol
1323 // table. If they're not there, the method doesn't exist.
1324 const char *name_to_probe = (name_str == NULL)
1325 ? vmSymbols::object_initializer_name()->as_C_string()
1326 : name_str;
1327 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1328 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1329
1330 if (name == NULL || signature == NULL) {
1331 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1332 }
1333
1334 // Throw a NoSuchMethodError exception if we have an instance of a
1335 // primitive java.lang.Class
1336 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1337 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1338 }
1339
1340 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1341
1342 // Make sure class is linked and initialized before handing id's out to
1343 // Method*s.
1344 klass->initialize(CHECK_NULL);
1345
1346 Method* m;
1347 if (name == vmSymbols::object_initializer_name() ||
1348 name == vmSymbols::class_initializer_name()) {
1349 // Never search superclasses for constructors
1350 if (klass->is_instance_klass()) {
1351 m = InstanceKlass::cast(klass)->find_method(name, signature);
1352 } else {
1353 m = NULL;
1354 }
1355 } else {
1356 m = klass->lookup_method(name, signature);
1357 if (m == NULL && klass->is_instance_klass()) {
1358 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1359 }
1360 }
1361 if (m == NULL || (m->is_static() != is_static)) {
1362 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1363 }
1364 return m->jmethod_id();
1365 }
1366
1367
1368 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1369 const char *name, const char *sig))
1370 JNIWrapper("GetMethodID");
1371 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1372 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1373 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1374 return ret;
1375 JNI_END
1376
1377
1378 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1379 const char *name, const char *sig))
1380 JNIWrapper("GetStaticMethodID");
1381 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1382 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1383 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1384 return ret;
1385 JNI_END
1386
1387
1388
1389 //
1390 // Calling Methods
1391 //
1392
1393
1394 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1395 , EntryProbe, ReturnProbe) \
1396 \
1397 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1398 , ReturnProbe); \
1399 \
1400 JNI_ENTRY(ResultType, \
1401 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1402 JNIWrapper("Call" XSTR(Result) "Method"); \
1403 \
1404 EntryProbe; \
1405 ResultType ret = 0;\
1406 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1407 (const ResultType&)ret);\
1408 \
1409 va_list args; \
1410 va_start(args, methodID); \
1411 JavaValue jvalue(Tag); \
1412 JNI_ArgumentPusherVaArg ap(methodID, args); \
1413 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1414 va_end(args); \
1415 ret = jvalue.get_##ResultType(); \
1416 return ret;\
1417 JNI_END
1418
1419 // the runtime type of subword integral basic types is integer
1420 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1421 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1424 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1427 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1429 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1430 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1432
1433 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1434 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1436 DEFINE_CALLMETHOD(jint, Int, T_INT,
1437 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1440 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1442 // Float and double probes don't return value because dtrace doesn't currently support it
1443 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1444 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1446 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1447 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1448 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1449
1450 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1451 , EntryProbe, ReturnProbe) \
1452 \
1453 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1454 , ReturnProbe); \
1455 \
1456 JNI_ENTRY(ResultType, \
1457 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1458 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1459 \
1460 EntryProbe;\
1461 ResultType ret = 0;\
1462 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1463 (const ResultType&)ret);\
1464 \
1465 JavaValue jvalue(Tag); \
1466 JNI_ArgumentPusherVaArg ap(methodID, args); \
1467 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1468 ret = jvalue.get_##ResultType(); \
1469 return ret;\
1470 JNI_END
1471
1472 // the runtime type of subword integral basic types is integer
1473 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1474 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1477 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1480 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1482 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1483 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1485
1486 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1487 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1489 DEFINE_CALLMETHODV(jint, Int, T_INT,
1490 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1493 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1495 // Float and double probes don't return value because dtrace doesn't currently support it
1496 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1497 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1499 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1500 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1502
1503 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1504 , EntryProbe, ReturnProbe) \
1505 \
1506 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1507 , ReturnProbe); \
1508 \
1509 JNI_ENTRY(ResultType, \
1510 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1511 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1512 EntryProbe; \
1513 ResultType ret = 0;\
1514 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1515 (const ResultType&)ret);\
1516 \
1517 JavaValue jvalue(Tag); \
1518 JNI_ArgumentPusherArray ap(methodID, args); \
1519 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1520 ret = jvalue.get_##ResultType(); \
1521 return ret;\
1522 JNI_END
1523
1524 // the runtime type of subword integral basic types is integer
1525 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1526 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1529 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1532 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1534 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1535 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1537
1538 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1539 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1541 DEFINE_CALLMETHODA(jint, Int, T_INT,
1542 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1545 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1547 // Float and double probes don't return value because dtrace doesn't currently support it
1548 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1549 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1551 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1552 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1553 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1554
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1558
1559
1560 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1561 JNIWrapper("CallVoidMethod");
1562 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1563 DT_VOID_RETURN_MARK(CallVoidMethod);
1564
1565 va_list args;
1566 va_start(args, methodID);
1567 JavaValue jvalue(T_VOID);
1568 JNI_ArgumentPusherVaArg ap(methodID, args);
1569 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1570 va_end(args);
1571 JNI_END
1572
1573
1574 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1575 JNIWrapper("CallVoidMethodV");
1576 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1577 DT_VOID_RETURN_MARK(CallVoidMethodV);
1578
1579 JavaValue jvalue(T_VOID);
1580 JNI_ArgumentPusherVaArg ap(methodID, args);
1581 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1582 JNI_END
1583
1584
1585 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1586 JNIWrapper("CallVoidMethodA");
1587 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1588 DT_VOID_RETURN_MARK(CallVoidMethodA);
1589
1590 JavaValue jvalue(T_VOID);
1591 JNI_ArgumentPusherArray ap(methodID, args);
1592 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1593 JNI_END
1594
1595
1596
1597 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1598 , EntryProbe, ReturnProbe) \
1599 \
1600 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1601 , ReturnProbe);\
1602 \
1603 JNI_ENTRY(ResultType, \
1604 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1605 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1606 \
1607 EntryProbe;\
1608 ResultType ret;\
1609 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1610 (const ResultType&)ret);\
1611 \
1612 va_list args; \
1613 va_start(args, methodID); \
1614 JavaValue jvalue(Tag); \
1615 JNI_ArgumentPusherVaArg ap(methodID, args); \
1616 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1617 va_end(args); \
1618 ret = jvalue.get_##ResultType(); \
1619 return ret;\
1620 JNI_END
1621
1622 // the runtime type of subword integral basic types is integer
1623 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1624 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1627 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1630 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1632 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1633 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1635
1636 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1637 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1639 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1640 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1643 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644 // Float and double probes don't return value because dtrace doesn't currently support it
1645 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1646 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1647 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1649 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1650 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1651 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1652
1653 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1654 , EntryProbe, ReturnProbe) \
1655 \
1656 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1657 , ReturnProbe);\
1658 \
1659 JNI_ENTRY(ResultType, \
1660 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1661 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1662 \
1663 EntryProbe;\
1664 ResultType ret;\
1665 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1666 (const ResultType&)ret);\
1667 \
1668 JavaValue jvalue(Tag); \
1669 JNI_ArgumentPusherVaArg ap(methodID, args); \
1670 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1671 ret = jvalue.get_##ResultType(); \
1672 return ret;\
1673 JNI_END
1674
1675 // the runtime type of subword integral basic types is integer
1676 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1677 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1680 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1683 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1685 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1686 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1688
1689 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1690 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1692 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1693 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1696 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697 // Float and double probes don't return value because dtrace doesn't currently support it
1698 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1699 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1700 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1702 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1703 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1704 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1705
1706 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1707 , EntryProbe, ReturnProbe) \
1708 \
1709 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1710 , ReturnProbe);\
1711 \
1712 JNI_ENTRY(ResultType, \
1713 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1714 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1715 \
1716 EntryProbe;\
1717 ResultType ret;\
1718 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1719 (const ResultType&)ret);\
1720 \
1721 JavaValue jvalue(Tag); \
1722 JNI_ArgumentPusherArray ap(methodID, args); \
1723 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1724 ret = jvalue.get_##ResultType(); \
1725 return ret;\
1726 JNI_END
1727
1728 // the runtime type of subword integral basic types is integer
1729 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1730 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1733 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1736 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1738 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1739 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1741
1742 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1743 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1745 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1746 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1749 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750 // Float and double probes don't return value because dtrace doesn't currently support it
1751 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1752 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1753 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1755 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1756 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1757 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1758
1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1765
1766 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1767 JNIWrapper("CallNonvirtualVoidMethod");
1768
1769 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1770 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1771
1772 va_list args;
1773 va_start(args, methodID);
1774 JavaValue jvalue(T_VOID);
1775 JNI_ArgumentPusherVaArg ap(methodID, args);
1776 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1777 va_end(args);
1778 JNI_END
1779
1780
1781 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1782 JNIWrapper("CallNonvirtualVoidMethodV");
1783
1784 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1785 env, obj, cls, (uintptr_t) methodID);
1786 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1787
1788 JavaValue jvalue(T_VOID);
1789 JNI_ArgumentPusherVaArg ap(methodID, args);
1790 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1791 JNI_END
1792
1793
1794 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1795 JNIWrapper("CallNonvirtualVoidMethodA");
1796 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1797 env, obj, cls, (uintptr_t) methodID);
1798 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1799 JavaValue jvalue(T_VOID);
1800 JNI_ArgumentPusherArray ap(methodID, args);
1801 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1802 JNI_END
1803
1804
1805
1806 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1807 , EntryProbe, ResultProbe) \
1808 \
1809 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1810 , ResultProbe); \
1811 \
1812 JNI_ENTRY(ResultType, \
1813 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1814 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1815 \
1816 EntryProbe; \
1817 ResultType ret = 0;\
1818 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1819 (const ResultType&)ret);\
1820 \
1821 va_list args; \
1822 va_start(args, methodID); \
1823 JavaValue jvalue(Tag); \
1824 JNI_ArgumentPusherVaArg ap(methodID, args); \
1825 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1826 va_end(args); \
1827 ret = jvalue.get_##ResultType(); \
1828 return ret;\
1829 JNI_END
1830
1831 // the runtime type of subword integral basic types is integer
1832 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1833 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1836 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1839 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1841 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1842 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1844
1845 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1846 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1848 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1849 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1851 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1852 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1854 // Float and double probes don't return value because dtrace doesn't currently support it
1855 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1856 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1858 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1859 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1860 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1861
1862 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1863 , EntryProbe, ResultProbe) \
1864 \
1865 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1866 , ResultProbe); \
1867 \
1868 JNI_ENTRY(ResultType, \
1869 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1870 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1871 \
1872 EntryProbe; \
1873 ResultType ret = 0;\
1874 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1875 (const ResultType&)ret);\
1876 \
1877 JavaValue jvalue(Tag); \
1878 JNI_ArgumentPusherVaArg ap(methodID, args); \
1879 /* Make sure class is initialized before trying to invoke its method */ \
1880 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1881 k->initialize(CHECK_0); \
1882 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1883 va_end(args); \
1884 ret = jvalue.get_##ResultType(); \
1885 return ret;\
1886 JNI_END
1887
1888 // the runtime type of subword integral basic types is integer
1889 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1890 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1893 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1896 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1898 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1899 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1901
1902 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1903 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1905 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1906 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1908 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1909 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1911 // Float and double probes don't return value because dtrace doesn't currently support it
1912 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1913 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1915 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1916 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1917 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1918
1919 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1920 , EntryProbe, ResultProbe) \
1921 \
1922 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1923 , ResultProbe); \
1924 \
1925 JNI_ENTRY(ResultType, \
1926 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1927 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1928 \
1929 EntryProbe; \
1930 ResultType ret = 0;\
1931 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1932 (const ResultType&)ret);\
1933 \
1934 JavaValue jvalue(Tag); \
1935 JNI_ArgumentPusherArray ap(methodID, args); \
1936 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1937 ret = jvalue.get_##ResultType(); \
1938 return ret;\
1939 JNI_END
1940
1941 // the runtime type of subword integral basic types is integer
1942 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1943 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1946 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1949 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1951 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1952 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1954
1955 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1956 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1958 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1959 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1961 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1962 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1964 // Float and double probes don't return value because dtrace doesn't currently support it
1965 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1966 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1968 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1969 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1970 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1971
1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1978
1979 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1980 JNIWrapper("CallStaticVoidMethod");
1981 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1982 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1983
1984 va_list args;
1985 va_start(args, methodID);
1986 JavaValue jvalue(T_VOID);
1987 JNI_ArgumentPusherVaArg ap(methodID, args);
1988 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1989 va_end(args);
1990 JNI_END
1991
1992
1993 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1994 JNIWrapper("CallStaticVoidMethodV");
1995 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1996 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1997
1998 JavaValue jvalue(T_VOID);
1999 JNI_ArgumentPusherVaArg ap(methodID, args);
2000 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2001 JNI_END
2002
2003
2004 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2005 JNIWrapper("CallStaticVoidMethodA");
2006 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2007 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2008
2009 JavaValue jvalue(T_VOID);
2010 JNI_ArgumentPusherArray ap(methodID, args);
2011 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2012 JNI_END
2013
2014
2015 //
2016 // Accessing Fields
2017 //
2018
2019
2020 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2021 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2022
2023 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2024 const char *name, const char *sig))
2025 JNIWrapper("GetFieldID");
2026 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2027 jfieldID ret = 0;
2028 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2029
2030 // The class should have been loaded (we have an instance of the class
2031 // passed in) so the field and signature should already be in the symbol
2032 // table. If they're not there, the field doesn't exist.
2033 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2034 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2035 if (fieldname == NULL || signame == NULL) {
2036 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2037 }
2038 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2039 // Make sure class is initialized before handing id's out to fields
2040 k->initialize(CHECK_NULL);
2041
2042 fieldDescriptor fd;
2043 if (!k->is_instance_klass() ||
2044 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2045 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2046 }
2047
2048 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2049 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2050 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2051 return ret;
2052 JNI_END
2053
2054
2055 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2056 JNIWrapper("GetObjectField");
2057 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2058 oop o = JNIHandles::resolve_non_null(obj);
2059 Klass* k = o->klass();
2060 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2061 // Keep JVMTI addition small and only check enabled flag here.
2062 // jni_GetField_probe() assumes that is okay to create handles.
2063 if (JvmtiExport::should_post_field_access()) {
2064 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2065 }
2066 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2067 jobject ret = JNIHandles::make_local(env, loaded_obj);
2068 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2069 return ret;
2070 JNI_END
2071
2072
2073
2074 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2075 , EntryProbe, ReturnProbe) \
2076 \
2077 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2078 , ReturnProbe); \
2079 \
2080 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2081 JNIWrapper("Get" XSTR(Result) "Field"); \
2082 \
2083 EntryProbe; \
2084 Return ret = 0;\
2085 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2086 \
2087 oop o = JNIHandles::resolve_non_null(obj); \
2088 Klass* k = o->klass(); \
2089 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2090 /* Keep JVMTI addition small and only check enabled flag here. */ \
2091 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2092 /* and creates a ResetNoHandleMark. */ \
2093 if (JvmtiExport::should_post_field_access()) { \
2094 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2095 } \
2096 ret = o->Fieldname##_field(offset); \
2097 return ret; \
2098 JNI_END
2099
2100 DEFINE_GETFIELD(jboolean, bool, Boolean
2101 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2102 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2103 DEFINE_GETFIELD(jbyte, byte, Byte
2104 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2105 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2106 DEFINE_GETFIELD(jchar, char, Char
2107 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2108 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2109 DEFINE_GETFIELD(jshort, short, Short
2110 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2111 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2112 DEFINE_GETFIELD(jint, int, Int
2113 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2115 DEFINE_GETFIELD(jlong, long, Long
2116 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2117 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2118 // Float and double probes don't return value because dtrace doesn't currently support it
2119 DEFINE_GETFIELD(jfloat, float, Float
2120 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2122 DEFINE_GETFIELD(jdouble, double, Double
2123 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2125
2126 address jni_GetBooleanField_addr() {
2127 return (address)jni_GetBooleanField;
2128 }
2129 address jni_GetByteField_addr() {
2130 return (address)jni_GetByteField;
2131 }
2132 address jni_GetCharField_addr() {
2133 return (address)jni_GetCharField;
2134 }
2135 address jni_GetShortField_addr() {
2136 return (address)jni_GetShortField;
2137 }
2138 address jni_GetIntField_addr() {
2139 return (address)jni_GetIntField;
2140 }
2141 address jni_GetLongField_addr() {
2142 return (address)jni_GetLongField;
2143 }
2144 address jni_GetFloatField_addr() {
2145 return (address)jni_GetFloatField;
2146 }
2147 address jni_GetDoubleField_addr() {
2148 return (address)jni_GetDoubleField;
2149 }
2150
2151 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2152 JNIWrapper("SetObjectField");
2153 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2154 oop o = JNIHandles::resolve_non_null(obj);
2155 Klass* k = o->klass();
2156 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2157 // Keep JVMTI addition small and only check enabled flag here.
2158 // jni_SetField_probe_nh() assumes that is not okay to create handles
2159 // and creates a ResetNoHandleMark.
2160 if (JvmtiExport::should_post_field_modification()) {
2161 jvalue field_value;
2162 field_value.l = value;
2163 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2164 }
2165 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2166 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2167 JNI_END
2168
2169
2170 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2171 , EntryProbe, ReturnProbe) \
2172 \
2173 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2174 JNIWrapper("Set" XSTR(Result) "Field"); \
2175 \
2176 EntryProbe; \
2177 \
2178 oop o = JNIHandles::resolve_non_null(obj); \
2179 Klass* k = o->klass(); \
2180 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2181 /* Keep JVMTI addition small and only check enabled flag here. */ \
2182 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2183 /* and creates a ResetNoHandleMark. */ \
2184 if (JvmtiExport::should_post_field_modification()) { \
2185 jvalue field_value; \
2186 field_value.unionType = value; \
2187 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2188 } \
2189 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2190 o->Fieldname##_field_put(offset, value); \
2191 ReturnProbe; \
2192 JNI_END
2193
2194 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2195 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2196 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2197 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2198 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2200 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2201 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2203 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2204 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2206 DEFINE_SETFIELD(jint, int, Int, 'I', i
2207 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETINTFIELD_RETURN())
2209 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2210 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2212 // Float and double probes don't return value because dtrace doesn't currently support it
2213 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2214 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2215 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2216 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2217 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2218 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2219
2220 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2221 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2222
2223 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2224 JNIWrapper("ToReflectedField");
2225 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2226 jobject ret = NULL;
2227 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2228
2229 fieldDescriptor fd;
2230 bool found = false;
2231 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2232
2233 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2234
2235 if (isStatic) {
2236 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2237 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2238 assert(id->is_static_field_id(), "invalid static field id");
2239 found = id->find_local_field(&fd);
2240 } else {
2241 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2242 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2243 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2244 }
2245 assert(found, "bad fieldID passed into jni_ToReflectedField");
2246 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2247 ret = JNIHandles::make_local(env, reflected);
2248 return ret;
2249 JNI_END
2250
2251
2252 //
2253 // Accessing Static Fields
2254 //
2255 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2256 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2257
2258 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2259 const char *name, const char *sig))
2260 JNIWrapper("GetStaticFieldID");
2261 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2262 jfieldID ret = NULL;
2263 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2264
2265 // The class should have been loaded (we have an instance of the class
2266 // passed in) so the field and signature should already be in the symbol
2267 // table. If they're not there, the field doesn't exist.
2268 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2269 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2270 if (fieldname == NULL || signame == NULL) {
2271 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2272 }
2273 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2274 // Make sure class is initialized before handing id's out to static fields
2275 k->initialize(CHECK_NULL);
2276
2277 fieldDescriptor fd;
2278 if (!k->is_instance_klass() ||
2279 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2280 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2281 }
2282
2283 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2284 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2285 debug_only(id->set_is_static_field_id();)
2286
2287 debug_only(id->verify(fd.field_holder()));
2288
2289 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2290 return ret;
2291 JNI_END
2292
2293
2294 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2295 JNIWrapper("GetStaticObjectField");
2296 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2297 #if INCLUDE_JNI_CHECK
2298 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2299 #endif // INCLUDE_JNI_CHECK
2300 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2301 assert(id->is_static_field_id(), "invalid static field id");
2302 // Keep JVMTI addition small and only check enabled flag here.
2303 // jni_GetField_probe() assumes that is okay to create handles.
2304 if (JvmtiExport::should_post_field_access()) {
2305 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2306 }
2307 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2308 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2309 return ret;
2310 JNI_END
2311
2312
2313 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2314 , EntryProbe, ReturnProbe) \
2315 \
2316 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2317 , ReturnProbe); \
2318 \
2319 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2320 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2321 EntryProbe; \
2322 Return ret = 0;\
2323 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2324 (const Return&)ret);\
2325 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2326 assert(id->is_static_field_id(), "invalid static field id"); \
2327 /* Keep JVMTI addition small and only check enabled flag here. */ \
2328 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2329 if (JvmtiExport::should_post_field_access()) { \
2330 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2331 } \
2332 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2333 return ret;\
2334 JNI_END
2335
2336 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2337 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2338 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2339 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2340 DEFINE_GETSTATICFIELD(jchar, char, Char
2341 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2342 DEFINE_GETSTATICFIELD(jshort, short, Short
2343 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jint, int, Int
2345 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jlong, long, Long
2347 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2348 // Float and double probes don't return value because dtrace doesn't currently support it
2349 DEFINE_GETSTATICFIELD(jfloat, float, Float
2350 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2351 DEFINE_GETSTATICFIELD(jdouble, double, Double
2352 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2353
2354 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2355 JNIWrapper("SetStaticObjectField");
2356 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2357 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2358 assert(id->is_static_field_id(), "invalid static field id");
2359 // Keep JVMTI addition small and only check enabled flag here.
2360 // jni_SetField_probe() assumes that is okay to create handles.
2361 if (JvmtiExport::should_post_field_modification()) {
2362 jvalue field_value;
2363 field_value.l = value;
2364 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2365 }
2366 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2367 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2368 JNI_END
2369
2370
2371
2372 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2373 , EntryProbe, ReturnProbe) \
2374 \
2375 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2376 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2377 EntryProbe; \
2378 \
2379 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2380 assert(id->is_static_field_id(), "invalid static field id"); \
2381 /* Keep JVMTI addition small and only check enabled flag here. */ \
2382 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2383 if (JvmtiExport::should_post_field_modification()) { \
2384 jvalue field_value; \
2385 field_value.unionType = value; \
2386 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2387 } \
2388 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2389 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2390 ReturnProbe;\
2391 JNI_END
2392
2393 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2394 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2395 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2396 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2397 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2398 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2400 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2403 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2406 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2409 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2411 // Float and double probes don't return value because dtrace doesn't currently support it
2412 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2413 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2414 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2415 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2416 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2417 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2418
2419 //
2420 // String Operations
2421 //
2422
2423 // Unicode Interface
2424
2425 DT_RETURN_MARK_DECL(NewString, jstring
2426 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2427
2428 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2429 JNIWrapper("NewString");
2430 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2431 jstring ret = NULL;
2432 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2433 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2434 ret = (jstring) JNIHandles::make_local(env, string);
2435 return ret;
2436 JNI_END
2437
2438
2439 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2440 JNIWrapper("GetStringLength");
2441 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2442 jsize ret = 0;
2443 oop s = JNIHandles::resolve_non_null(string);
2444 if (java_lang_String::value(s) != NULL) {
2445 ret = java_lang_String::length(s);
2446 }
2447 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2448 return ret;
2449 JNI_END
2450
2451
2452 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2453 JNIEnv *env, jstring string, jboolean *isCopy))
2454 JNIWrapper("GetStringChars");
2455 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2456 jchar* buf = NULL;
2457 oop s = JNIHandles::resolve_non_null(string);
2458 typeArrayOop s_value = java_lang_String::value(s);
2459 if (s_value != NULL) {
2460 int s_len = java_lang_String::length(s);
2461 bool is_latin1 = java_lang_String::is_latin1(s);
2462 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2463 /* JNI Specification states return NULL on OOM */
2464 if (buf != NULL) {
2465 if (s_len > 0) {
2466 if (!is_latin1) {
2467 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2468 } else {
2469 for (int i = 0; i < s_len; i++) {
2470 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2471 }
2472 }
2473 }
2474 buf[s_len] = 0;
2475 //%note jni_5
2476 if (isCopy != NULL) {
2477 *isCopy = JNI_TRUE;
2478 }
2479 }
2480 }
2481 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2482 return buf;
2483 JNI_END
2484
2485
2486 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2487 JNIWrapper("ReleaseStringChars");
2488 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2489 //%note jni_6
2490 if (chars != NULL) {
2491 // Since String objects are supposed to be immutable, don't copy any
2492 // new data back. A bad user will have to go after the char array.
2493 FreeHeap((void*) chars);
2494 }
2495 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2496 JNI_END
2497
2498
2499 // UTF Interface
2500
2501 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2502 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2503
2504 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2505 JNIWrapper("NewStringUTF");
2506 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2507 jstring ret;
2508 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2509
2510 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2511 ret = (jstring) JNIHandles::make_local(env, result);
2512 return ret;
2513 JNI_END
2514
2515
2516 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2517 JNIWrapper("GetStringUTFLength");
2518 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2519 jsize ret = 0;
2520 oop java_string = JNIHandles::resolve_non_null(string);
2521 if (java_lang_String::value(java_string) != NULL) {
2522 ret = java_lang_String::utf8_length(java_string);
2523 }
2524 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2525 return ret;
2526 JNI_END
2527
2528
2529 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2530 JNIWrapper("GetStringUTFChars");
2531 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2532 char* result = NULL;
2533 oop java_string = JNIHandles::resolve_non_null(string);
2534 if (java_lang_String::value(java_string) != NULL) {
2535 size_t length = java_lang_String::utf8_length(java_string);
2536 /* JNI Specification states return NULL on OOM */
2537 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2538 if (result != NULL) {
2539 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2540 if (isCopy != NULL) {
2541 *isCopy = JNI_TRUE;
2542 }
2543 }
2544 }
2545 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2546 return result;
2547 JNI_END
2548
2549
2550 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2551 JNIWrapper("ReleaseStringUTFChars");
2552 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2553 if (chars != NULL) {
2554 FreeHeap((char*) chars);
2555 }
2556 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2557 JNI_END
2558
2559
2560 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2561 JNIWrapper("GetArrayLength");
2562 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2563 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2564 assert(a->is_array(), "must be array");
2565 jsize ret = a->length();
2566 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2567 return ret;
2568 JNI_END
2569
2570
2571 //
2572 // Object Array Operations
2573 //
2574
2575 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2576 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2577
2578 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2579 JNIWrapper("NewObjectArray");
2580 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2581 jobjectArray ret = NULL;
2582 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2583 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2584 Klass* ak = ek->array_klass(CHECK_NULL);
2585 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2586 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2587 oop initial_value = JNIHandles::resolve(initialElement);
2588 if (initial_value != NULL) { // array already initialized with NULL
2589 for (int index = 0; index < length; index++) {
2590 result->obj_at_put(index, initial_value);
2591 }
2592 }
2593 ret = (jobjectArray) JNIHandles::make_local(env, result);
2594 return ret;
2595 JNI_END
2596
2597 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2598 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2599
2600 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2601 JNIWrapper("GetObjectArrayElement");
2602 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2603 jobject ret = NULL;
2604 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2605 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2606 if (a->is_within_bounds(index)) {
2607 ret = JNIHandles::make_local(env, a->obj_at(index));
2608 return ret;
2609 } else {
2610 char buf[jintAsStringSize];
2611 sprintf(buf, "%d", index);
2612 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2613 }
2614 JNI_END
2615
2616 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2617 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2618
2619 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2620 JNIWrapper("SetObjectArrayElement");
2621 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2622 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2623
2624 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2625 oop v = JNIHandles::resolve(value);
2626 if (a->is_within_bounds(index)) {
2627 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2628 a->obj_at_put(index, v);
2629 } else {
2630 THROW(vmSymbols::java_lang_ArrayStoreException());
2631 }
2632 } else {
2633 char buf[jintAsStringSize];
2634 sprintf(buf, "%d", index);
2635 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2636 }
2637 JNI_END
2638
2639
2640
2641 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2642 ,EntryProbe,ReturnProbe) \
2643 \
2644 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2645 , ReturnProbe); \
2646 \
2647 JNI_ENTRY(Return, \
2648 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2649 JNIWrapper("New" XSTR(Result) "Array"); \
2650 EntryProbe; \
2651 Return ret = NULL;\
2652 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2653 \
2654 oop obj= oopFactory::Allocator(len, CHECK_0); \
2655 ret = (Return) JNIHandles::make_local(env, obj); \
2656 return ret;\
2657 JNI_END
2658
2659 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2660 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2661 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2662 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2663 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2664 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2665 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2666 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2667 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2668 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2669 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2672 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2675 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2678 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2681 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2683
2684 // Return an address which will fault if the caller writes to it.
2685
2686 static char* get_bad_address() {
2687 static char* bad_address = NULL;
2688 if (bad_address == NULL) {
2689 size_t size = os::vm_allocation_granularity();
2690 bad_address = os::reserve_memory(size);
2691 if (bad_address != NULL) {
2692 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2693 /*is_committed*/false);
2694 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2695 }
2696 }
2697 return bad_address;
2698 }
2699
2700
2701
2702 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2703 , EntryProbe, ReturnProbe) \
2704 \
2705 JNI_QUICK_ENTRY(ElementType*, \
2706 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2707 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2708 EntryProbe; \
2709 /* allocate an chunk of memory in c land */ \
2710 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2711 ElementType* result; \
2712 int len = a->length(); \
2713 if (len == 0) { \
2714 /* Empty array: legal but useless, can't return NULL. \
2715 * Return a pointer to something useless. \
2716 * Avoid asserts in typeArrayOop. */ \
2717 result = (ElementType*)get_bad_address(); \
2718 } else { \
2719 /* JNI Specification states return NULL on OOM */ \
2720 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2721 if (result != NULL) { \
2722 /* copy the array to the c chunk */ \
2723 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2724 if (isCopy) { \
2725 *isCopy = JNI_TRUE; \
2726 } \
2727 } \
2728 } \
2729 ReturnProbe; \
2730 return result; \
2731 JNI_END
2732
2733 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2734 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2735 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2736 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2737 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2738 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2739 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2740 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2741 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2742 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2743 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2744 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2745 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2746 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2747 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2748 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2749 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2750 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2751 // Float and double probes don't return value because dtrace doesn't currently support it
2752 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2753 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2755 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2756 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2757 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2758
2759
2760 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2761 , EntryProbe, ReturnProbe);\
2762 \
2763 JNI_QUICK_ENTRY(void, \
2764 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2765 ElementType *buf, jint mode)) \
2766 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2767 EntryProbe; \
2768 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2769 int len = a->length(); \
2770 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2771 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2772 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2773 } \
2774 if ((mode == 0) || (mode == JNI_ABORT)) { \
2775 FreeHeap(buf); \
2776 } \
2777 } \
2778 ReturnProbe; \
2779 JNI_END
2780
2781 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2782 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2783 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2784 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2785 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2786 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2787 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2788 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2789 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2790 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2791 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2792 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2793 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2794 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2795 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2797 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2798 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2800 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2801 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2803 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2804 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2805
2806
2807 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2808 , EntryProbe, ReturnProbe); \
2809 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2810 , ReturnProbe); \
2811 \
2812 JNI_ENTRY(void, \
2813 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2814 jsize len, ElementType *buf)) \
2815 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2816 EntryProbe; \
2817 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2818 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2819 if (start < 0 || len < 0 || (start > src->length() - len)) { \
2820 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2821 } else { \
2822 if (len > 0) { \
2823 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2824 memcpy((u_char*) buf, \
2825 (u_char*) src->Tag##_at_addr(start), \
2826 len << sc); \
2827 } \
2828 } \
2829 JNI_END
2830
2831 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2832 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2833 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2834 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2835 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2836 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2837 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2838 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2839 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2840 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2841 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2842 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2843 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2844 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2845 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2846 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2847 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2848 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2849 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2850 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2851 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2852 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2853 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2854 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2855
2856
2857 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2858 , EntryProbe, ReturnProbe); \
2859 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2860 ,ReturnProbe); \
2861 \
2862 JNI_ENTRY(void, \
2863 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2864 jsize len, const ElementType *buf)) \
2865 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2866 EntryProbe; \
2867 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2868 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2869 if (start < 0 || len < 0 || (start > dst->length() - len)) { \
2870 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2871 } else { \
2872 if (len > 0) { \
2873 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2874 memcpy((u_char*) dst->Tag##_at_addr(start), \
2875 (u_char*) buf, \
2876 len << sc); \
2877 } \
2878 } \
2879 JNI_END
2880
2881 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2882 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2883 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2884 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2885 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2886 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2887 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2888 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2889 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2890 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2891 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2892 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2893 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2894 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2895 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2896 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2897 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2898 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2899 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2900 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2901 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2902 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2903 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2904 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2905
2906
2907 //
2908 // Interception of natives
2909 //
2910
2911 // The RegisterNatives call being attempted tried to register with a method that
2912 // is not native. Ask JVM TI what prefixes have been specified. Then check
2913 // to see if the native method is now wrapped with the prefixes. See the
2914 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2915 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2916 #if INCLUDE_JVMTI
2917 ResourceMark rm(THREAD);
2918 Method* method;
2919 int name_len = name->utf8_length();
2920 char* name_str = name->as_utf8();
2921 int prefix_count;
2922 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2923 for (int i = 0; i < prefix_count; i++) {
2924 char* prefix = prefixes[i];
2925 int prefix_len = (int)strlen(prefix);
2926
2927 // try adding this prefix to the method name and see if it matches another method name
2928 int trial_len = name_len + prefix_len;
2929 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2930 strcpy(trial_name_str, prefix);
2931 strcat(trial_name_str, name_str);
2932 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2933 if (trial_name == NULL) {
2934 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2935 }
2936 method = k->lookup_method(trial_name, signature);
2937 if (method == NULL) {
2938 continue; // signature doesn't match, try the next prefix
2939 }
2940 if (method->is_native()) {
2941 method->set_is_prefixed_native();
2942 return method; // wahoo, we found a prefixed version of the method, return it
2943 }
2944 // found as non-native, so prefix is good, add it, probably just need more prefixes
2945 name_len = trial_len;
2946 name_str = trial_name_str;
2947 }
2948 #endif // INCLUDE_JVMTI
2949 return NULL; // not found
2950 }
2951
2952 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2953 Method* method = k->lookup_method(name, signature);
2954 if (method == NULL) {
2955 ResourceMark rm;
2956 stringStream st;
2957 st.print("Method %s name or signature does not match",
2958 Method::name_and_sig_as_C_string(k, name, signature));
2959 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2960 }
2961 if (!method->is_native()) {
2962 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2963 method = find_prefixed_native(k, name, signature, THREAD);
2964 if (method == NULL) {
2965 ResourceMark rm;
2966 stringStream st;
2967 st.print("Method %s is not declared as native",
2968 Method::name_and_sig_as_C_string(k, name, signature));
2969 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2970 }
2971 }
2972
2973 if (entry != NULL) {
2974 method->set_native_function(entry,
2975 Method::native_bind_event_is_interesting);
2976 } else {
2977 method->clear_native_function();
2978 }
2979 if (PrintJNIResolving) {
2980 ResourceMark rm(THREAD);
2981 tty->print_cr("[Registering JNI native method %s.%s]",
2982 method->method_holder()->external_name(),
2983 method->name()->as_C_string());
2984 }
2985 return true;
2986 }
2987
2988 DT_RETURN_MARK_DECL(RegisterNatives, jint
2989 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2990
2991 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2992 const JNINativeMethod *methods,
2993 jint nMethods))
2994 JNIWrapper("RegisterNatives");
2995 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2996 jint ret = 0;
2997 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2998
2999 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3000
3001 for (int index = 0; index < nMethods; index++) {
3002 const char* meth_name = methods[index].name;
3003 const char* meth_sig = methods[index].signature;
3004 int meth_name_len = (int)strlen(meth_name);
3005
3006 // The class should have been loaded (we have an instance of the class
3007 // passed in) so the method and signature should already be in the symbol
3008 // table. If they're not there, the method doesn't exist.
3009 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3010 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3011
3012 if (name == NULL || signature == NULL) {
3013 ResourceMark rm;
3014 stringStream st;
3015 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3016 // Must return negative value on failure
3017 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3018 }
3019
3020 bool res = register_native(k, name, signature,
3021 (address) methods[index].fnPtr, THREAD);
3022 if (!res) {
3023 ret = -1;
3024 break;
3025 }
3026 }
3027 return ret;
3028 JNI_END
3029
3030
3031 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3032 JNIWrapper("UnregisterNatives");
3033 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3034 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3035 //%note jni_2
3036 if (k->is_instance_klass()) {
3037 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3038 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3039 if (m->is_native()) {
3040 m->clear_native_function();
3041 m->set_signature_handler(NULL);
3042 }
3043 }
3044 }
3045 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3046 return 0;
3047 JNI_END
3048
3049 //
3050 // Monitor functions
3051 //
3052
3053 DT_RETURN_MARK_DECL(MonitorEnter, jint
3054 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3055
3056 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3057 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3058 jint ret = JNI_ERR;
3059 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3060
3061 // If the object is null, we can't do anything with it
3062 if (jobj == NULL) {
3063 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3064 }
3065
3066 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3067 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3068 ret = JNI_OK;
3069 return ret;
3070 JNI_END
3071
3072 DT_RETURN_MARK_DECL(MonitorExit, jint
3073 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3074
3075 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3076 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3077 jint ret = JNI_ERR;
3078 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3079
3080 // Don't do anything with a null object
3081 if (jobj == NULL) {
3082 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3083 }
3084
3085 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3086 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3087
3088 ret = JNI_OK;
3089 return ret;
3090 JNI_END
3091
3092 //
3093 // Extensions
3094 //
3095
3096 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3097 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3098
3099 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3100 JNIWrapper("GetStringRegion");
3101 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3102 DT_VOID_RETURN_MARK(GetStringRegion);
3103 oop s = JNIHandles::resolve_non_null(string);
3104 int s_len = java_lang_String::length(s);
3105 if (start < 0 || len < 0 || start > s_len - len) {
3106 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3107 } else {
3108 if (len > 0) {
3109 typeArrayOop s_value = java_lang_String::value(s);
3110 bool is_latin1 = java_lang_String::is_latin1(s);
3111 if (!is_latin1) {
3112 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3113 } else {
3114 for (int i = 0; i < len; i++) {
3115 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3116 }
3117 }
3118 }
3119 }
3120 JNI_END
3121
3122 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3123 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3124
3125 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3126 JNIWrapper("GetStringUTFRegion");
3127 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3128 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3129 oop s = JNIHandles::resolve_non_null(string);
3130 int s_len = java_lang_String::length(s);
3131 if (start < 0 || len < 0 || start > s_len - len) {
3132 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3133 } else {
3134 //%note jni_7
3135 if (len > 0) {
3136 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3137 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3138 // as_utf8_string null-terminates the result string
3139 } else {
3140 // JDK null-terminates the buffer even in len is zero
3141 if (buf != NULL) {
3142 buf[0] = 0;
3143 }
3144 }
3145 }
3146 JNI_END
3147
3148
3149 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3150 JNIWrapper("GetPrimitiveArrayCritical");
3151 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3152 GCLocker::lock_critical(thread);
3153 if (isCopy != NULL) {
3154 *isCopy = JNI_FALSE;
3155 }
3156 oop a = JNIHandles::resolve_non_null(array);
3157 assert(a->is_array(), "just checking");
3158 BasicType type;
3159 if (a->is_objArray()) {
3160 type = T_OBJECT;
3161 } else {
3162 type = TypeArrayKlass::cast(a->klass())->element_type();
3163 }
3164 void* ret = arrayOop(a)->base(type);
3165 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3166 return ret;
3167 JNI_END
3168
3169
3170 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3171 JNIWrapper("ReleasePrimitiveArrayCritical");
3172 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3173 // The array, carray and mode arguments are ignored
3174 GCLocker::unlock_critical(thread);
3175 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3176 JNI_END
3177
3178
3179 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3180 JNIWrapper("GetStringCritical");
3181 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3182 GCLocker::lock_critical(thread);
3183 oop s = JNIHandles::resolve_non_null(string);
3184 typeArrayOop s_value = java_lang_String::value(s);
3185 bool is_latin1 = java_lang_String::is_latin1(s);
3186 if (isCopy != NULL) {
3187 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3188 }
3189 jchar* ret;
3190 if (!is_latin1) {
3191 ret = (jchar*) s_value->base(T_CHAR);
3192 } else {
3193 // Inflate latin1 encoded string to UTF16
3194 int s_len = java_lang_String::length(s);
3195 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3196 /* JNI Specification states return NULL on OOM */
3197 if (ret != NULL) {
3198 for (int i = 0; i < s_len; i++) {
3199 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3200 }
3201 ret[s_len] = 0;
3202 }
3203 }
3204 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3205 return ret;
3206 JNI_END
3207
3208
3209 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3210 JNIWrapper("ReleaseStringCritical");
3211 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3212 // The str and chars arguments are ignored for UTF16 strings
3213 oop s = JNIHandles::resolve_non_null(str);
3214 bool is_latin1 = java_lang_String::is_latin1(s);
3215 if (is_latin1) {
3216 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3217 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3218 FREE_C_HEAP_ARRAY(jchar, chars);
3219 }
3220 GCLocker::unlock_critical(thread);
3221 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3222 JNI_END
3223
3224
3225 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3226 JNIWrapper("jni_NewWeakGlobalRef");
3227 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3228 Handle ref_handle(thread, JNIHandles::resolve(ref));
3229 jweak ret = JNIHandles::make_weak_global(ref_handle);
3230 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3231 return ret;
3232 JNI_END
3233
3234 // Must be JNI_ENTRY (with HandleMark)
3235 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3236 JNIWrapper("jni_DeleteWeakGlobalRef");
3237 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3238 JNIHandles::destroy_weak_global(ref);
3239 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3240 JNI_END
3241
3242
3243 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3244 JNIWrapper("jni_ExceptionCheck");
3245 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3246 jni_check_async_exceptions(thread);
3247 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3248 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3249 return ret;
3250 JNI_END
3251
3252
3253 // Initialization state for three routines below relating to
3254 // java.nio.DirectBuffers
3255 static int directBufferSupportInitializeStarted = 0;
3256 static volatile int directBufferSupportInitializeEnded = 0;
3257 static volatile int directBufferSupportInitializeFailed = 0;
3258 static jclass bufferClass = NULL;
3259 static jclass directBufferClass = NULL;
3260 static jclass directByteBufferClass = NULL;
3261 static jmethodID directByteBufferConstructor = NULL;
3262 static jfieldID directBufferAddressField = NULL;
3263 static jfieldID bufferCapacityField = NULL;
3264
3265 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3266 Handle loader; // null (bootstrap) loader
3267 Handle protection_domain; // null protection domain
3268
3269 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3270 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3271
3272 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3273 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3274 }
3275 return result;
3276 }
3277
3278 // These lookups are done with the NULL (bootstrap) ClassLoader to
3279 // circumvent any security checks that would be done by jni_FindClass.
3280 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3281 {
3282 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3283 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3284 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3285 return true;
3286 }
3287 JNI_END
3288
3289
3290 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3291 if (directBufferSupportInitializeFailed) {
3292 return false;
3293 }
3294
3295 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3296 if (!lookupDirectBufferClasses(env)) {
3297 directBufferSupportInitializeFailed = 1;
3298 return false;
3299 }
3300
3301 // Make global references for these
3302 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3303 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3304 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3305
3306 // Get needed field and method IDs
3307 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3308 if (env->ExceptionCheck()) {
3309 env->ExceptionClear();
3310 directBufferSupportInitializeFailed = 1;
3311 return false;
3312 }
3313 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3314 if (env->ExceptionCheck()) {
3315 env->ExceptionClear();
3316 directBufferSupportInitializeFailed = 1;
3317 return false;
3318 }
3319 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3320 if (env->ExceptionCheck()) {
3321 env->ExceptionClear();
3322 directBufferSupportInitializeFailed = 1;
3323 return false;
3324 }
3325
3326 if ((directByteBufferConstructor == NULL) ||
3327 (directBufferAddressField == NULL) ||
3328 (bufferCapacityField == NULL)) {
3329 directBufferSupportInitializeFailed = 1;
3330 return false;
3331 }
3332
3333 directBufferSupportInitializeEnded = 1;
3334 } else {
3335 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3336 os::naked_yield();
3337 }
3338 }
3339
3340 return !directBufferSupportInitializeFailed;
3341 }
3342
3343 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3344 {
3345 // thread_from_jni_environment() will block if VM is gone.
3346 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3347
3348 JNIWrapper("jni_NewDirectByteBuffer");
3349 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3350
3351 if (!directBufferSupportInitializeEnded) {
3352 if (!initializeDirectBufferSupport(env, thread)) {
3353 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3354 return NULL;
3355 }
3356 }
3357
3358 // Being paranoid about accidental sign extension on address
3359 jlong addr = (jlong) ((uintptr_t) address);
3360 // NOTE that package-private DirectByteBuffer constructor currently
3361 // takes int capacity
3362 jint cap = (jint) capacity;
3363 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3364 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3365 return ret;
3366 }
3367
3368 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3369 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3370
3371 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3372 {
3373 // thread_from_jni_environment() will block if VM is gone.
3374 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3375
3376 JNIWrapper("jni_GetDirectBufferAddress");
3377 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3378 void* ret = NULL;
3379 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3380
3381 if (!directBufferSupportInitializeEnded) {
3382 if (!initializeDirectBufferSupport(env, thread)) {
3383 return 0;
3384 }
3385 }
3386
3387 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3388 return 0;
3389 }
3390
3391 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3392 return ret;
3393 }
3394
3395 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3396 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3397
3398 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3399 {
3400 // thread_from_jni_environment() will block if VM is gone.
3401 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3402
3403 JNIWrapper("jni_GetDirectBufferCapacity");
3404 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3405 jlong ret = -1;
3406 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3407
3408 if (!directBufferSupportInitializeEnded) {
3409 if (!initializeDirectBufferSupport(env, thread)) {
3410 ret = 0;
3411 return ret;
3412 }
3413 }
3414
3415 if (buf == NULL) {
3416 return -1;
3417 }
3418
3419 if (!env->IsInstanceOf(buf, directBufferClass)) {
3420 return -1;
3421 }
3422
3423 // NOTE that capacity is currently an int in the implementation
3424 ret = env->GetIntField(buf, bufferCapacityField);
3425 return ret;
3426 }
3427
3428
3429 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3430 JNIWrapper("GetVersion");
3431 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3432 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3433 return CurrentVersion;
3434 JNI_END
3435
3436 extern struct JavaVM_ main_vm;
3437
3438 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3439 JNIWrapper("jni_GetJavaVM");
3440 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3441 *vm = (JavaVM *)(&main_vm);
3442 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3443 return JNI_OK;
3444 JNI_END
3445
3446
3447 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3448 JNIWrapper("GetModule");
3449 return Modules::get_module(clazz, THREAD);
3450 JNI_END
3451
3452
3453 // Structure containing all jni functions
3454 struct JNINativeInterface_ jni_NativeInterface = {
3455 NULL,
3456 NULL,
3457 NULL,
3458
3459 NULL,
3460
3461 jni_GetVersion,
3462
3463 jni_DefineClass,
3464 jni_FindClass,
3465
3466 jni_FromReflectedMethod,
3467 jni_FromReflectedField,
3468
3469 jni_ToReflectedMethod,
3470
3471 jni_GetSuperclass,
3472 jni_IsAssignableFrom,
3473
3474 jni_ToReflectedField,
3475
3476 jni_Throw,
3477 jni_ThrowNew,
3478 jni_ExceptionOccurred,
3479 jni_ExceptionDescribe,
3480 jni_ExceptionClear,
3481 jni_FatalError,
3482
3483 jni_PushLocalFrame,
3484 jni_PopLocalFrame,
3485
3486 jni_NewGlobalRef,
3487 jni_DeleteGlobalRef,
3488 jni_DeleteLocalRef,
3489 jni_IsSameObject,
3490
3491 jni_NewLocalRef,
3492 jni_EnsureLocalCapacity,
3493
3494 jni_AllocObject,
3495 jni_NewObject,
3496 jni_NewObjectV,
3497 jni_NewObjectA,
3498
3499 jni_GetObjectClass,
3500 jni_IsInstanceOf,
3501
3502 jni_GetMethodID,
3503
3504 jni_CallObjectMethod,
3505 jni_CallObjectMethodV,
3506 jni_CallObjectMethodA,
3507 jni_CallBooleanMethod,
3508 jni_CallBooleanMethodV,
3509 jni_CallBooleanMethodA,
3510 jni_CallByteMethod,
3511 jni_CallByteMethodV,
3512 jni_CallByteMethodA,
3513 jni_CallCharMethod,
3514 jni_CallCharMethodV,
3515 jni_CallCharMethodA,
3516 jni_CallShortMethod,
3517 jni_CallShortMethodV,
3518 jni_CallShortMethodA,
3519 jni_CallIntMethod,
3520 jni_CallIntMethodV,
3521 jni_CallIntMethodA,
3522 jni_CallLongMethod,
3523 jni_CallLongMethodV,
3524 jni_CallLongMethodA,
3525 jni_CallFloatMethod,
3526 jni_CallFloatMethodV,
3527 jni_CallFloatMethodA,
3528 jni_CallDoubleMethod,
3529 jni_CallDoubleMethodV,
3530 jni_CallDoubleMethodA,
3531 jni_CallVoidMethod,
3532 jni_CallVoidMethodV,
3533 jni_CallVoidMethodA,
3534
3535 jni_CallNonvirtualObjectMethod,
3536 jni_CallNonvirtualObjectMethodV,
3537 jni_CallNonvirtualObjectMethodA,
3538 jni_CallNonvirtualBooleanMethod,
3539 jni_CallNonvirtualBooleanMethodV,
3540 jni_CallNonvirtualBooleanMethodA,
3541 jni_CallNonvirtualByteMethod,
3542 jni_CallNonvirtualByteMethodV,
3543 jni_CallNonvirtualByteMethodA,
3544 jni_CallNonvirtualCharMethod,
3545 jni_CallNonvirtualCharMethodV,
3546 jni_CallNonvirtualCharMethodA,
3547 jni_CallNonvirtualShortMethod,
3548 jni_CallNonvirtualShortMethodV,
3549 jni_CallNonvirtualShortMethodA,
3550 jni_CallNonvirtualIntMethod,
3551 jni_CallNonvirtualIntMethodV,
3552 jni_CallNonvirtualIntMethodA,
3553 jni_CallNonvirtualLongMethod,
3554 jni_CallNonvirtualLongMethodV,
3555 jni_CallNonvirtualLongMethodA,
3556 jni_CallNonvirtualFloatMethod,
3557 jni_CallNonvirtualFloatMethodV,
3558 jni_CallNonvirtualFloatMethodA,
3559 jni_CallNonvirtualDoubleMethod,
3560 jni_CallNonvirtualDoubleMethodV,
3561 jni_CallNonvirtualDoubleMethodA,
3562 jni_CallNonvirtualVoidMethod,
3563 jni_CallNonvirtualVoidMethodV,
3564 jni_CallNonvirtualVoidMethodA,
3565
3566 jni_GetFieldID,
3567
3568 jni_GetObjectField,
3569 jni_GetBooleanField,
3570 jni_GetByteField,
3571 jni_GetCharField,
3572 jni_GetShortField,
3573 jni_GetIntField,
3574 jni_GetLongField,
3575 jni_GetFloatField,
3576 jni_GetDoubleField,
3577
3578 jni_SetObjectField,
3579 jni_SetBooleanField,
3580 jni_SetByteField,
3581 jni_SetCharField,
3582 jni_SetShortField,
3583 jni_SetIntField,
3584 jni_SetLongField,
3585 jni_SetFloatField,
3586 jni_SetDoubleField,
3587
3588 jni_GetStaticMethodID,
3589
3590 jni_CallStaticObjectMethod,
3591 jni_CallStaticObjectMethodV,
3592 jni_CallStaticObjectMethodA,
3593 jni_CallStaticBooleanMethod,
3594 jni_CallStaticBooleanMethodV,
3595 jni_CallStaticBooleanMethodA,
3596 jni_CallStaticByteMethod,
3597 jni_CallStaticByteMethodV,
3598 jni_CallStaticByteMethodA,
3599 jni_CallStaticCharMethod,
3600 jni_CallStaticCharMethodV,
3601 jni_CallStaticCharMethodA,
3602 jni_CallStaticShortMethod,
3603 jni_CallStaticShortMethodV,
3604 jni_CallStaticShortMethodA,
3605 jni_CallStaticIntMethod,
3606 jni_CallStaticIntMethodV,
3607 jni_CallStaticIntMethodA,
3608 jni_CallStaticLongMethod,
3609 jni_CallStaticLongMethodV,
3610 jni_CallStaticLongMethodA,
3611 jni_CallStaticFloatMethod,
3612 jni_CallStaticFloatMethodV,
3613 jni_CallStaticFloatMethodA,
3614 jni_CallStaticDoubleMethod,
3615 jni_CallStaticDoubleMethodV,
3616 jni_CallStaticDoubleMethodA,
3617 jni_CallStaticVoidMethod,
3618 jni_CallStaticVoidMethodV,
3619 jni_CallStaticVoidMethodA,
3620
3621 jni_GetStaticFieldID,
3622
3623 jni_GetStaticObjectField,
3624 jni_GetStaticBooleanField,
3625 jni_GetStaticByteField,
3626 jni_GetStaticCharField,
3627 jni_GetStaticShortField,
3628 jni_GetStaticIntField,
3629 jni_GetStaticLongField,
3630 jni_GetStaticFloatField,
3631 jni_GetStaticDoubleField,
3632
3633 jni_SetStaticObjectField,
3634 jni_SetStaticBooleanField,
3635 jni_SetStaticByteField,
3636 jni_SetStaticCharField,
3637 jni_SetStaticShortField,
3638 jni_SetStaticIntField,
3639 jni_SetStaticLongField,
3640 jni_SetStaticFloatField,
3641 jni_SetStaticDoubleField,
3642
3643 jni_NewString,
3644 jni_GetStringLength,
3645 jni_GetStringChars,
3646 jni_ReleaseStringChars,
3647
3648 jni_NewStringUTF,
3649 jni_GetStringUTFLength,
3650 jni_GetStringUTFChars,
3651 jni_ReleaseStringUTFChars,
3652
3653 jni_GetArrayLength,
3654
3655 jni_NewObjectArray,
3656 jni_GetObjectArrayElement,
3657 jni_SetObjectArrayElement,
3658
3659 jni_NewBooleanArray,
3660 jni_NewByteArray,
3661 jni_NewCharArray,
3662 jni_NewShortArray,
3663 jni_NewIntArray,
3664 jni_NewLongArray,
3665 jni_NewFloatArray,
3666 jni_NewDoubleArray,
3667
3668 jni_GetBooleanArrayElements,
3669 jni_GetByteArrayElements,
3670 jni_GetCharArrayElements,
3671 jni_GetShortArrayElements,
3672 jni_GetIntArrayElements,
3673 jni_GetLongArrayElements,
3674 jni_GetFloatArrayElements,
3675 jni_GetDoubleArrayElements,
3676
3677 jni_ReleaseBooleanArrayElements,
3678 jni_ReleaseByteArrayElements,
3679 jni_ReleaseCharArrayElements,
3680 jni_ReleaseShortArrayElements,
3681 jni_ReleaseIntArrayElements,
3682 jni_ReleaseLongArrayElements,
3683 jni_ReleaseFloatArrayElements,
3684 jni_ReleaseDoubleArrayElements,
3685
3686 jni_GetBooleanArrayRegion,
3687 jni_GetByteArrayRegion,
3688 jni_GetCharArrayRegion,
3689 jni_GetShortArrayRegion,
3690 jni_GetIntArrayRegion,
3691 jni_GetLongArrayRegion,
3692 jni_GetFloatArrayRegion,
3693 jni_GetDoubleArrayRegion,
3694
3695 jni_SetBooleanArrayRegion,
3696 jni_SetByteArrayRegion,
3697 jni_SetCharArrayRegion,
3698 jni_SetShortArrayRegion,
3699 jni_SetIntArrayRegion,
3700 jni_SetLongArrayRegion,
3701 jni_SetFloatArrayRegion,
3702 jni_SetDoubleArrayRegion,
3703
3704 jni_RegisterNatives,
3705 jni_UnregisterNatives,
3706
3707 jni_MonitorEnter,
3708 jni_MonitorExit,
3709
3710 jni_GetJavaVM,
3711
3712 jni_GetStringRegion,
3713 jni_GetStringUTFRegion,
3714
3715 jni_GetPrimitiveArrayCritical,
3716 jni_ReleasePrimitiveArrayCritical,
3717
3718 jni_GetStringCritical,
3719 jni_ReleaseStringCritical,
3720
3721 jni_NewWeakGlobalRef,
3722 jni_DeleteWeakGlobalRef,
3723
3724 jni_ExceptionCheck,
3725
3726 jni_NewDirectByteBuffer,
3727 jni_GetDirectBufferAddress,
3728 jni_GetDirectBufferCapacity,
3729
3730 // New 1_6 features
3731
3732 jni_GetObjectRefType,
3733
3734 // Module features
3735
3736 jni_GetModule
3737 };
3738
3739
3740 // For jvmti use to modify jni function table.
3741 // Java threads in native contiues to run until it is transitioned
3742 // to VM at safepoint. Before the transition or before it is blocked
3743 // for safepoint it may access jni function table. VM could crash if
3744 // any java thread access the jni function table in the middle of memcpy.
3745 // To avoid this each function pointers are copied automically.
3746 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3747 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3748 intptr_t *a = (intptr_t *) jni_functions();
3749 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3750 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3751 Atomic::store(*b++, a++);
3752 }
3753 }
3754
3755 void quicken_jni_functions() {
3756 // Replace Get<Primitive>Field with fast versions
3757 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3758 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3759 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3760 // windows x86 currently needs SEH wrapper and the gain of the fast
3761 // versions currently isn't certain for server vm on uniprocessor.
3762 && os::is_MP()
3763 #endif
3764 ) {
3765 address func;
3766 func = JNI_FastGetField::generate_fast_get_boolean_field();
3767 if (func != (address)-1) {
3768 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3769 }
3770 func = JNI_FastGetField::generate_fast_get_byte_field();
3771 if (func != (address)-1) {
3772 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3773 }
3774 func = JNI_FastGetField::generate_fast_get_char_field();
3775 if (func != (address)-1) {
3776 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3777 }
3778 func = JNI_FastGetField::generate_fast_get_short_field();
3779 if (func != (address)-1) {
3780 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3781 }
3782 func = JNI_FastGetField::generate_fast_get_int_field();
3783 if (func != (address)-1) {
3784 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3785 }
3786 func = JNI_FastGetField::generate_fast_get_long_field();
3787 if (func != (address)-1) {
3788 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3789 }
3790 func = JNI_FastGetField::generate_fast_get_float_field();
3791 if (func != (address)-1) {
3792 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3793 }
3794 func = JNI_FastGetField::generate_fast_get_double_field();
3795 if (func != (address)-1) {
3796 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3797 }
3798 }
3799 }
3800
3801 // Returns the function structure
3802 struct JNINativeInterface_* jni_functions() {
3803 #if INCLUDE_JNI_CHECK
3804 if (CheckJNICalls) return jni_functions_check();
3805 #endif // INCLUDE_JNI_CHECK
3806 return &jni_NativeInterface;
3807 }
3808
3809 // Returns the function structure
3810 struct JNINativeInterface_* jni_functions_nocheck() {
3811 return &jni_NativeInterface;
3812 }
3813
3814
3815 // Invocation API
3816
3817
3818 // Forward declaration
3819 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3820
3821 // Global invocation API vars
3822 volatile int vm_created = 0;
3823 // Indicate whether it is safe to recreate VM
3824 volatile int safe_to_recreate_vm = 1;
3825 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3826
3827
3828 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3829 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3830
3831 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3832 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3833
3834 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3835 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3836 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3837 jint ret = JNI_ERR;
3838 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3839
3840 if (Threads::is_supported_jni_version(args->version)) {
3841 ret = JNI_OK;
3842 }
3843 // 1.1 style no longer supported in hotspot.
3844 // According the JNI spec, we should update args->version on return.
3845 // We also use the structure to communicate with launcher about default
3846 // stack size.
3847 if (args->version == JNI_VERSION_1_1) {
3848 args->version = JNI_VERSION_1_2;
3849 // javaStackSize is int in arguments structure
3850 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3851 args->javaStackSize = (jint)(ThreadStackSize * K);
3852 }
3853 return ret;
3854 }
3855
3856 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3857 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3858
3859 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3860 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3861
3862 jint result = JNI_ERR;
3863 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3864
3865 // We're about to use Atomic::xchg for synchronization. Some Zero
3866 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3867 // but __sync_lock_test_and_set is not guaranteed to do what we want
3868 // on all architectures. So we check it works before relying on it.
3869 #if defined(ZERO) && defined(ASSERT)
3870 {
3871 jint a = 0xcafebabe;
3872 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3873 void *c = &a;
3874 void *d = Atomic::xchg(&b, &c);
3875 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3876 assert(c == &b && d == &a, "Atomic::xchg() works");
3877 }
3878 #endif // ZERO && ASSERT
3879
3880 // At the moment it's only possible to have one Java VM,
3881 // since some of the runtime state is in global variables.
3882
3883 // We cannot use our mutex locks here, since they only work on
3884 // Threads. We do an atomic compare and exchange to ensure only
3885 // one thread can call this method at a time
3886
3887 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3888 // the add/dec implementations are dependent on whether we are running
3889 // on a multiprocessor, and at this stage of initialization the os::is_MP
3890 // function used to determine this will always return false. Atomic::xchg
3891 // does not have this problem.
3892 if (Atomic::xchg(1, &vm_created) == 1) {
3893 return JNI_EEXIST; // already created, or create attempt in progress
3894 }
3895 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3896 return JNI_ERR; // someone tried and failed and retry not allowed.
3897 }
3898
3899 assert(vm_created == 1, "vm_created is true during the creation");
3900
3901 /**
3902 * Certain errors during initialization are recoverable and do not
3903 * prevent this method from being called again at a later time
3904 * (perhaps with different arguments). However, at a certain
3905 * point during initialization if an error occurs we cannot allow
3906 * this function to be called again (or it will crash). In those
3907 * situations, the 'canTryAgain' flag is set to false, which atomically
3908 * sets safe_to_recreate_vm to 1, such that any new call to
3909 * JNI_CreateJavaVM will immediately fail using the above logic.
3910 */
3911 bool can_try_again = true;
3912
3913 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3914 if (result == JNI_OK) {
3915 JavaThread *thread = JavaThread::current();
3916 assert(!thread->has_pending_exception(), "should have returned not OK");
3917 /* thread is thread_in_vm here */
3918 *vm = (JavaVM *)(&main_vm);
3919 *(JNIEnv**)penv = thread->jni_environment();
3920
3921 #if INCLUDE_JVMCI
3922 if (EnableJVMCI) {
3923 if (UseJVMCICompiler) {
3924 // JVMCI is initialized on a CompilerThread
3925 if (BootstrapJVMCI) {
3926 JavaThread* THREAD = thread;
3927 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3928 compiler->bootstrap(THREAD);
3929 if (HAS_PENDING_EXCEPTION) {
3930 HandleMark hm;
3931 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3932 }
3933 }
3934 }
3935 }
3936 #endif
3937
3938 // Tracks the time application was running before GC
3939 RuntimeService::record_application_start();
3940
3941 // Notify JVMTI
3942 if (JvmtiExport::should_post_thread_life()) {
3943 JvmtiExport::post_thread_start(thread);
3944 }
3945
3946 EventThreadStart event;
3947 if (event.should_commit()) {
3948 event.set_thread(THREAD_TRACE_ID(thread));
3949 event.commit();
3950 }
3951
3952 #ifndef PRODUCT
3953 // Check if we should compile all classes on bootclasspath
3954 if (CompileTheWorld) ClassLoader::compile_the_world();
3955 if (ReplayCompiles) ciReplay::replay(thread);
3956
3957 // Some platforms (like Win*) need a wrapper around these test
3958 // functions in order to properly handle error conditions.
3959 VMError::test_error_handler();
3960 if (ExecuteInternalVMTests) {
3961 InternalVMTests::run();
3962 }
3963 #endif
3964
3965 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3966 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3967 } else {
3968 // If create_vm exits because of a pending exception, exit with that
3969 // exception. In the future when we figure out how to reclaim memory,
3970 // we may be able to exit with JNI_ERR and allow the calling application
3971 // to continue.
3972 if (Universe::is_fully_initialized()) {
3973 // otherwise no pending exception possible - VM will already have aborted
3974 JavaThread* THREAD = JavaThread::current();
3975 if (HAS_PENDING_EXCEPTION) {
3976 HandleMark hm;
3977 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3978 }
3979 }
3980
3981 if (can_try_again) {
3982 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3983 safe_to_recreate_vm = 1;
3984 }
3985
3986 // Creation failed. We must reset vm_created
3987 *vm = 0;
3988 *(JNIEnv**)penv = 0;
3989 // reset vm_created last to avoid race condition. Use OrderAccess to
3990 // control both compiler and architectural-based reordering.
3991 OrderAccess::release_store(&vm_created, 0);
3992 }
3993
3994 // Flush stdout and stderr before exit.
3995 fflush(stdout);
3996 fflush(stderr);
3997
3998 return result;
3999
4000 }
4001
4002 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4003 jint result = JNI_ERR;
4004 // On Windows, let CreateJavaVM run with SEH protection
4005 #ifdef _WIN32
4006 __try {
4007 #endif
4008 result = JNI_CreateJavaVM_inner(vm, penv, args);
4009 #ifdef _WIN32
4010 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4011 // Nothing to do.
4012 }
4013 #endif
4014 return result;
4015 }
4016
4017 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4018 // See bug 4367188, the wrapper can sometimes cause VM crashes
4019 // JNIWrapper("GetCreatedJavaVMs");
4020
4021 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4022
4023 if (vm_created == 1) {
4024 if (numVMs != NULL) *numVMs = 1;
4025 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4026 } else {
4027 if (numVMs != NULL) *numVMs = 0;
4028 }
4029 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4030 return JNI_OK;
4031 }
4032
4033 extern "C" {
4034
4035 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4036 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4037
4038 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4039 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4040 jint res = JNI_ERR;
4041 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4042
4043 if (vm_created == 0) {
4044 res = JNI_ERR;
4045 return res;
4046 }
4047
4048 JNIWrapper("DestroyJavaVM");
4049 JNIEnv *env;
4050 JavaVMAttachArgs destroyargs;
4051 destroyargs.version = CurrentVersion;
4052 destroyargs.name = (char *)"DestroyJavaVM";
4053 destroyargs.group = NULL;
4054 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4055 if (res != JNI_OK) {
4056 return res;
4057 }
4058
4059 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4060 JavaThread* thread = JavaThread::current();
4061 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4062 if (Threads::destroy_vm()) {
4063 // Should not change thread state, VM is gone
4064 vm_created = 0;
4065 res = JNI_OK;
4066 return res;
4067 } else {
4068 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4069 res = JNI_ERR;
4070 return res;
4071 }
4072 }
4073
4074 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4075 jint result = JNI_ERR;
4076 // On Windows, we need SEH protection
4077 #ifdef _WIN32
4078 __try {
4079 #endif
4080 result = jni_DestroyJavaVM_inner(vm);
4081 #ifdef _WIN32
4082 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4083 // Nothing to do.
4084 }
4085 #endif
4086 return result;
4087 }
4088
4089 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4090 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4091
4092 // Check below commented out from JDK1.2fcs as well
4093 /*
4094 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4095 return JNI_EVERSION;
4096 }
4097 */
4098
4099 Thread* t = Thread::current_or_null();
4100 if (t != NULL) {
4101 // If the thread has been attached this operation is a no-op
4102 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4103 return JNI_OK;
4104 }
4105
4106 // Create a thread and mark it as attaching so it will be skipped by the
4107 // ThreadsListEnumerator - see CR 6404306
4108 JavaThread* thread = new JavaThread(true);
4109
4110 // Set correct safepoint info. The thread is going to call into Java when
4111 // initializing the Java level thread object. Hence, the correct state must
4112 // be set in order for the Safepoint code to deal with it correctly.
4113 thread->set_thread_state(_thread_in_vm);
4114 thread->record_stack_base_and_size();
4115 thread->initialize_thread_current();
4116
4117 if (!os::create_attached_thread(thread)) {
4118 thread->smr_delete();
4119 return JNI_ERR;
4120 }
4121 // Enable stack overflow checks
4122 thread->create_stack_guard_pages();
4123
4124 thread->initialize_tlab();
4125
4126 thread->cache_global_variables();
4127
4128 // Crucial that we do not have a safepoint check for this thread, since it has
4129 // not been added to the Thread list yet.
4130 { Threads_lock->lock_without_safepoint_check();
4131 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4132 // avoid this thread trying to do a GC before it is added to the thread-list
4133 thread->set_active_handles(JNIHandleBlock::allocate_block());
4134 Threads::add(thread, daemon);
4135 Threads_lock->unlock();
4136 }
4137 // Create thread group and name info from attach arguments
4138 oop group = NULL;
4139 char* thread_name = NULL;
4140 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4141 group = JNIHandles::resolve(args->group);
4142 thread_name = args->name; // may be NULL
4143 }
4144 if (group == NULL) group = Universe::main_thread_group();
4145
4146 // Create Java level thread object and attach it to this thread
4147 bool attach_failed = false;
4148 {
4149 EXCEPTION_MARK;
4150 HandleMark hm(THREAD);
4151 Handle thread_group(THREAD, group);
4152 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4153 if (HAS_PENDING_EXCEPTION) {
4154 CLEAR_PENDING_EXCEPTION;
4155 // cleanup outside the handle mark.
4156 attach_failed = true;
4157 }
4158 }
4159
4160 if (attach_failed) {
4161 // Added missing cleanup
4162 thread->cleanup_failed_attach_current_thread();
4163 return JNI_ERR;
4164 }
4165
4166 // mark the thread as no longer attaching
4167 // this uses a fence to push the change through so we don't have
4168 // to regrab the threads_lock
4169 thread->set_done_attaching_via_jni();
4170
4171 // Set java thread status.
4172 java_lang_Thread::set_thread_status(thread->threadObj(),
4173 java_lang_Thread::RUNNABLE);
4174
4175 // Notify the debugger
4176 if (JvmtiExport::should_post_thread_life()) {
4177 JvmtiExport::post_thread_start(thread);
4178 }
4179
4180 EventThreadStart event;
4181 if (event.should_commit()) {
4182 event.set_thread(THREAD_TRACE_ID(thread));
4183 event.commit();
4184 }
4185
4186 *(JNIEnv**)penv = thread->jni_environment();
4187
4188 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4189 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4190 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4191 // needed.
4192
4193 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4194
4195 // Perform any platform dependent FPU setup
4196 os::setup_fpu();
4197
4198 return JNI_OK;
4199 }
4200
4201
4202 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4203 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4204 if (vm_created == 0) {
4205 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4206 return JNI_ERR;
4207 }
4208
4209 JNIWrapper("AttachCurrentThread");
4210 jint ret = attach_current_thread(vm, penv, _args, false);
4211 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4212 return ret;
4213 }
4214
4215
4216 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4217 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4218
4219 JNIWrapper("DetachCurrentThread");
4220
4221 // If the thread has already been detached the operation is a no-op
4222 if (Thread::current_or_null() == NULL) {
4223 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4224 return JNI_OK;
4225 }
4226
4227 VM_Exit::block_if_vm_exited();
4228
4229 JavaThread* thread = JavaThread::current();
4230 if (thread->has_last_Java_frame()) {
4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4232 // Can't detach a thread that's running java, that can't work.
4233 return JNI_ERR;
4234 }
4235
4236 // Safepoint support. Have to do call-back to safepoint code, if in the
4237 // middel of a safepoint operation
4238 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4239
4240 // XXX: Note that JavaThread::exit() call below removes the guards on the
4241 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4242 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4243 // of the guards is visible in jni_AttachCurrentThread above,
4244 // the removal of the guards is buried below in JavaThread::exit()
4245 // here. The abstraction should be more symmetrically either exposed
4246 // or hidden (e.g. it could probably be hidden in the same
4247 // (platform-dependent) methods where we do alternate stack
4248 // maintenance work?)
4249 thread->exit(false, JavaThread::jni_detach);
4250 thread->smr_delete();
4251
4252 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4253 return JNI_OK;
4254 }
4255
4256 DT_RETURN_MARK_DECL(GetEnv, jint
4257 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4258
4259 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4260 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4261 jint ret = JNI_ERR;
4262 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4263
4264 if (vm_created == 0) {
4265 *penv = NULL;
4266 ret = JNI_EDETACHED;
4267 return ret;
4268 }
4269
4270 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4271 return ret;
4272 }
4273
4274 #ifndef JVMPI_VERSION_1
4275 // need these in order to be polite about older agents
4276 #define JVMPI_VERSION_1 ((jint)0x10000001)
4277 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4278 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4279 #endif // !JVMPI_VERSION_1
4280
4281 Thread* thread = Thread::current_or_null();
4282 if (thread != NULL && thread->is_Java_thread()) {
4283 if (Threads::is_supported_jni_version_including_1_1(version)) {
4284 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4285 ret = JNI_OK;
4286 return ret;
4287
4288 } else if (version == JVMPI_VERSION_1 ||
4289 version == JVMPI_VERSION_1_1 ||
4290 version == JVMPI_VERSION_1_2) {
4291 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4292 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4293 ret = JNI_EVERSION;
4294 return ret;
4295 } else if (JvmtiExport::is_jvmdi_version(version)) {
4296 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4297 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4298 ret = JNI_EVERSION;
4299 return ret;
4300 } else {
4301 *penv = NULL;
4302 ret = JNI_EVERSION;
4303 return ret;
4304 }
4305 } else {
4306 *penv = NULL;
4307 ret = JNI_EDETACHED;
4308 return ret;
4309 }
4310 }
4311
4312
4313 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4314 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4315 if (vm_created == 0) {
4316 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4317 return JNI_ERR;
4318 }
4319
4320 JNIWrapper("AttachCurrentThreadAsDaemon");
4321 jint ret = attach_current_thread(vm, penv, _args, true);
4322 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4323 return ret;
4324 }
4325
4326
4327 } // End extern "C"
4328
4329 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4330 NULL,
4331 NULL,
4332 NULL,
4333
4334 jni_DestroyJavaVM,
4335 jni_AttachCurrentThread,
4336 jni_DetachCurrentThread,
4337 jni_GetEnv,
4338 jni_AttachCurrentThreadAsDaemon
4339 };