1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classFileStream.hpp"
30 #include "classfile/classLoader.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/javaClasses.inline.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/symbolTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/gcLocker.inline.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/compilationPolicy.hpp"
64 #include "runtime/fieldDescriptor.hpp"
65 #include "runtime/fprofiler.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/orderAccess.inline.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/vm_operations.hpp"
77 #include "services/memTracker.hpp"
78 #include "services/runtimeService.hpp"
79 #include "trace/traceMacros.hpp"
80 #include "trace/tracing.hpp"
81 #include "utilities/defaultStream.hpp"
82 #include "utilities/dtrace.hpp"
83 #include "utilities/events.hpp"
84 #include "utilities/histogram.hpp"
85 #include "utilities/internalVMTests.hpp"
86 #include "utilities/macros.hpp"
87 #if INCLUDE_ALL_GCS
88 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
89 #endif // INCLUDE_ALL_GCS
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciCompiler.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 static jint CurrentVersion = JNI_VERSION_9;
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 jint 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 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
329 }
330 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
331 }
332 ResourceMark rm(THREAD);
333 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
334 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
335
336 if (UsePerfData && !class_loader.is_null()) {
337 Handle class_loader1 (THREAD, oopDesc::bs()->write_barrier(class_loader()));
338 // check whether the current caller thread holds the lock or not.
339 // If not, increment the corresponding counter
340 if (ObjectSynchronizer::
341 query_lock_ownership((JavaThread*)THREAD, class_loader1) !=
342 ObjectSynchronizer::owner_self) {
343 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
344 }
345 }
346 Klass* k = SystemDictionary::resolve_from_stream(class_name,
347 class_loader,
348 Handle(),
349 &st,
350 CHECK_NULL);
351
352 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
353 trace_class_resolution(k);
354 }
355
356 cls = (jclass)JNIHandles::make_local(
357 env, k->java_mirror());
358 return cls;
359 JNI_END
360
361
362
363 static bool first_time_FindClass = true;
364
365 DT_RETURN_MARK_DECL(FindClass, jclass
366 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
367
368 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
369 JNIWrapper("FindClass");
370
371 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
372
373 jclass result = NULL;
374 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
375
376 // Remember if we are the first invocation of jni_FindClass
377 bool first_time = first_time_FindClass;
378 first_time_FindClass = false;
379
380 // Sanity check the name: it cannot be null or larger than the maximum size
381 // name we can fit in the constant pool.
382 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
383 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
384 }
385
386 //%note jni_3
387 Handle loader;
388 Handle protection_domain;
389 // Find calling class
390 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
391 if (k.not_null()) {
392 loader = Handle(THREAD, k->class_loader());
393 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
394 // in the correct class context.
395 if (loader.is_null() &&
396 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
397 JavaValue result(T_OBJECT);
398 JavaCalls::call_static(&result, k,
399 vmSymbols::getFromClass_name(),
400 vmSymbols::void_class_signature(),
401 thread);
402 if (HAS_PENDING_EXCEPTION) {
403 Handle ex(thread, thread->pending_exception());
404 CLEAR_PENDING_EXCEPTION;
405 THROW_HANDLE_0(ex);
406 }
407 oop mirror = (oop) result.get_jobject();
408 loader = Handle(THREAD,
409 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
410 protection_domain = Handle(THREAD,
411 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
412 }
413 } else {
414 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
415 loader = Handle(THREAD, SystemDictionary::java_system_loader());
416 }
417
418 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
419 result = find_class_from_class_loader(env, sym, true, loader,
420 protection_domain, true, thread);
421
422 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
423 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
424 }
425
426 // If we were the first invocation of jni_FindClass, we enable compilation again
427 // rather than just allowing invocation counter to overflow and decay.
428 // Controlled by flag DelayCompilationDuringStartup.
429 if (first_time && !CompileTheWorld)
430 CompilationPolicy::completed_vm_startup();
431
432 return result;
433 JNI_END
434
435 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
436 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
437
438 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
439 JNIWrapper("FromReflectedMethod");
440
441 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
442
443 jmethodID ret = NULL;
444 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
445
446 // method is a handle to a java.lang.reflect.Method object
447 oop reflected = JNIHandles::resolve_non_null(method);
448 oop mirror = NULL;
449 int slot = 0;
450
451 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
452 mirror = java_lang_reflect_Constructor::clazz(reflected);
453 slot = java_lang_reflect_Constructor::slot(reflected);
454 } else {
455 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
456 mirror = java_lang_reflect_Method::clazz(reflected);
457 slot = java_lang_reflect_Method::slot(reflected);
458 }
459 Klass* k = java_lang_Class::as_Klass(mirror);
460
461 KlassHandle k1(THREAD, k);
462 // Make sure class is initialized before handing id's out to methods
463 k1()->initialize(CHECK_NULL);
464 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
465 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
466 return ret;
467 JNI_END
468
469 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
470 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
471
472 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
473 JNIWrapper("FromReflectedField");
474
475 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
476
477 jfieldID ret = NULL;
478 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
479
480 // field is a handle to a java.lang.reflect.Field object
481 oop reflected = JNIHandles::resolve_non_null(field);
482 oop mirror = java_lang_reflect_Field::clazz(reflected);
483 Klass* k = java_lang_Class::as_Klass(mirror);
484 int slot = java_lang_reflect_Field::slot(reflected);
485 int modifiers = java_lang_reflect_Field::modifiers(reflected);
486
487 KlassHandle k1(THREAD, k);
488 // Make sure class is initialized before handing id's out to fields
489 k1()->initialize(CHECK_NULL);
490
491 // First check if this is a static field
492 if (modifiers & JVM_ACC_STATIC) {
493 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
494 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
495 assert(id != NULL, "corrupt Field object");
496 debug_only(id->set_is_static_field_id();)
497 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
498 ret = jfieldIDWorkaround::to_static_jfieldID(id);
499 return ret;
500 }
501
502 // The slot is the index of the field description in the field-array
503 // The jfieldID is the offset of the field within the object
504 // It may also have hash bits for k, if VerifyJNIFields is turned on.
505 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
506 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
507 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
508 return ret;
509 JNI_END
510
511
512 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
513 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
514
515 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
516 JNIWrapper("ToReflectedMethod");
517
518 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
519
520 jobject ret = NULL;
521 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
522
523 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
524 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
525 oop reflection_method;
526 if (m->is_initializer()) {
527 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
528 } else {
529 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
530 }
531 ret = JNIHandles::make_local(env, reflection_method);
532 return ret;
533 JNI_END
534
535 DT_RETURN_MARK_DECL(GetSuperclass, jclass
536 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
537
538 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
539 JNIWrapper("GetSuperclass");
540
541 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
542
543 jclass obj = NULL;
544 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
545
546 oop mirror = JNIHandles::resolve_non_null(sub);
547 // primitive classes return NULL
548 if (java_lang_Class::is_primitive(mirror)) return NULL;
549
550 // Rules of Class.getSuperClass as implemented by KLass::java_super:
551 // arrays return Object
552 // interfaces return NULL
553 // proper classes return Klass::super()
554 Klass* k = java_lang_Class::as_Klass(mirror);
555 if (k->is_interface()) return NULL;
556
557 // return mirror for superclass
558 Klass* super = k->java_super();
559 // super2 is the value computed by the compiler's getSuperClass intrinsic:
560 debug_only(Klass* super2 = ( k->is_array_klass()
561 ? SystemDictionary::Object_klass()
562 : k->super() ) );
563 assert(super == super2,
564 "java_super computation depends on interface, array, other super");
565 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
566 return obj;
567 JNI_END
568
569 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
570 JNIWrapper("IsSubclassOf");
571
572 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
573
574 oop sub_mirror = JNIHandles::resolve_non_null(sub);
575 oop super_mirror = JNIHandles::resolve_non_null(super);
576 if (java_lang_Class::is_primitive(sub_mirror) ||
577 java_lang_Class::is_primitive(super_mirror)) {
578 jboolean ret = oopDesc::equals(sub_mirror, super_mirror);
579 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
580 return ret;
581 }
582 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
583 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
584 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
585 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
586 JNI_TRUE : JNI_FALSE;
587
588 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
589 return ret;
590 JNI_END
591
592
593 DT_RETURN_MARK_DECL(Throw, jint
594 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
595
596 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
597 JNIWrapper("Throw");
598
599 HOTSPOT_JNI_THROW_ENTRY(env, obj);
600
601 jint ret = JNI_OK;
602 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
603
604 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
605 ShouldNotReachHere();
606 return 0; // Mute compiler.
607 JNI_END
608
609
610 DT_RETURN_MARK_DECL(ThrowNew, jint
611 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
612
613 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
614 JNIWrapper("ThrowNew");
615
616 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
617
618 jint ret = JNI_OK;
619 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
620
621 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
622 Symbol* name = k->name();
623 Handle class_loader (THREAD, k->class_loader());
624 Handle protection_domain (THREAD, k->protection_domain());
625 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
626 ShouldNotReachHere();
627 return 0; // Mute compiler.
628 JNI_END
629
630
631 // JNI functions only transform a pending async exception to a synchronous
632 // exception in ExceptionOccurred and ExceptionCheck calls, since
633 // delivering an async exception in other places won't change the native
634 // code's control flow and would be harmful when native code further calls
635 // JNI functions with a pending exception. Async exception is also checked
636 // during the call, so ExceptionOccurred/ExceptionCheck won't return
637 // false but deliver the async exception at the very end during
638 // state transition.
639
640 static void jni_check_async_exceptions(JavaThread *thread) {
641 assert(thread == Thread::current(), "must be itself");
642 thread->check_and_handle_async_exceptions();
643 }
644
645 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
646 JNIWrapper("ExceptionOccurred");
647
648 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
649
650 jni_check_async_exceptions(thread);
651 oop exception = thread->pending_exception();
652 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
655 return ret;
656 JNI_END
657
658
659 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
660 JNIWrapper("ExceptionDescribe");
661
662 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
663
664 if (thread->has_pending_exception()) {
665 Handle ex(thread, thread->pending_exception());
666 thread->clear_pending_exception();
667 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
668 // Don't print anything if we are being killed.
669 } else {
670 jio_fprintf(defaultStream::error_stream(), "Exception ");
671 if (thread != NULL && thread->threadObj() != NULL) {
672 ResourceMark rm(THREAD);
673 jio_fprintf(defaultStream::error_stream(),
674 "in thread \"%s\" ", thread->get_thread_name());
675 }
676 if (ex->is_a(SystemDictionary::Throwable_klass())) {
677 JavaValue result(T_VOID);
678 JavaCalls::call_virtual(&result,
679 ex,
680 KlassHandle(THREAD,
681 SystemDictionary::Throwable_klass()),
682 vmSymbols::printStackTrace_name(),
683 vmSymbols::void_method_signature(),
684 THREAD);
685 // If an exception is thrown in the call it gets thrown away. Not much
686 // we can do with it. The native code that calls this, does not check
687 // for the exception - hence, it might still be in the thread when DestroyVM gets
688 // called, potentially causing a few asserts to trigger - since no pending exception
689 // is expected.
690 CLEAR_PENDING_EXCEPTION;
691 } else {
692 ResourceMark rm(THREAD);
693 jio_fprintf(defaultStream::error_stream(),
694 ". Uncaught exception of type %s.",
695 ex->klass()->external_name());
696 }
697 }
698 }
699
700 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
701 JNI_END
702
703
704 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
705 JNIWrapper("ExceptionClear");
706
707 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
708
709 // The jni code might be using this API to clear java thrown exception.
710 // So just mark jvmti thread exception state as exception caught.
711 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
712 if (state != NULL && state->is_exception_detected()) {
713 state->set_exception_caught();
714 }
715 thread->clear_pending_exception();
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
718 JNI_END
719
720
721 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
722 JNIWrapper("FatalError");
723
724 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
725
726 tty->print_cr("FATAL ERROR in native method: %s", msg);
727 thread->print_stack();
728 os::abort(); // Dump core and abort
729 JNI_END
730
731
732 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
733 JNIWrapper("PushLocalFrame");
734
735 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
736
737 //%note jni_11
738 if (capacity < 0 ||
739 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
740 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
741 return JNI_ERR;
742 }
743 JNIHandleBlock* old_handles = thread->active_handles();
744 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
745 assert(new_handles != NULL, "should not be NULL");
746 new_handles->set_pop_frame_link(old_handles);
747 thread->set_active_handles(new_handles);
748 jint ret = JNI_OK;
749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
750 return ret;
751 JNI_END
752
753
754 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
755 JNIWrapper("PopLocalFrame");
756
757 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
758
759 //%note jni_11
760 Handle result_handle(thread, JNIHandles::resolve(result));
761 JNIHandleBlock* old_handles = thread->active_handles();
762 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
763 if (new_handles != NULL) {
764 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
765 // This way code will still work if PopLocalFrame is called without a corresponding
766 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
767 // the release_block call will release the blocks.
768 thread->set_active_handles(new_handles);
769 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
770 JNIHandleBlock::release_block(old_handles, thread); // may block
771 result = JNIHandles::make_local(thread, result_handle());
772 }
773 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
774 return result;
775 JNI_END
776
777
778 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
779 JNIWrapper("NewGlobalRef");
780
781 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
782
783 Handle ref_handle(thread, JNIHandles::resolve(ref));
784 jobject ret = JNIHandles::make_global(ref_handle);
785
786 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
787 return ret;
788 JNI_END
789
790 // Must be JNI_ENTRY (with HandleMark)
791 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
792 JNIWrapper("DeleteGlobalRef");
793
794 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
795
796 JNIHandles::destroy_global(ref);
797
798 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
799 JNI_END
800
801 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
802 JNIWrapper("DeleteLocalRef");
803
804 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
805
806 JNIHandles::destroy_local(obj);
807
808 HOTSPOT_JNI_DELETELOCALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
812 JNIWrapper("IsSameObject");
813
814 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
815
816 oop a = JNIHandles::resolve(r1);
817 oop b = JNIHandles::resolve(r2);
818 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE;
819
820 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
821 return ret;
822 JNI_END
823
824
825 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
826 JNIWrapper("NewLocalRef");
827
828 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
829
830 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
831
832 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
833 return ret;
834 JNI_END
835
836 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
837 JNIWrapper("EnsureLocalCapacity");
838
839 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
840
841 jint ret;
842 if (capacity >= 0 &&
843 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
844 ret = JNI_OK;
845 } else {
846 ret = JNI_ERR;
847 }
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
850 return ret;
851 JNI_END
852
853 // Return the Handle Type
854 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
855 JNIWrapper("GetObjectRefType");
856
857 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
858
859 jobjectRefType ret;
860 if (JNIHandles::is_local_handle(thread, obj) ||
861 JNIHandles::is_frame_handle(thread, obj))
862 ret = JNILocalRefType;
863 else if (JNIHandles::is_global_handle(obj))
864 ret = JNIGlobalRefType;
865 else if (JNIHandles::is_weak_global_handle(obj))
866 ret = JNIWeakGlobalRefType;
867 else
868 ret = JNIInvalidRefType;
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
871 return ret;
872 JNI_END
873
874
875 class JNI_ArgumentPusher : public SignatureIterator {
876 protected:
877 JavaCallArguments* _arguments;
878
879 virtual void get_bool () = 0;
880 virtual void get_char () = 0;
881 virtual void get_short () = 0;
882 virtual void get_byte () = 0;
883 virtual void get_int () = 0;
884 virtual void get_long () = 0;
885 virtual void get_float () = 0;
886 virtual void get_double () = 0;
887 virtual void get_object () = 0;
888
889 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
890 this->_return_type = T_ILLEGAL;
891 _arguments = NULL;
892 }
893
894 public:
895 virtual void iterate( uint64_t fingerprint ) = 0;
896
897 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
898
899 inline void do_bool() { if (!is_return_type()) get_bool(); }
900 inline void do_char() { if (!is_return_type()) get_char(); }
901 inline void do_short() { if (!is_return_type()) get_short(); }
902 inline void do_byte() { if (!is_return_type()) get_byte(); }
903 inline void do_int() { if (!is_return_type()) get_int(); }
904 inline void do_long() { if (!is_return_type()) get_long(); }
905 inline void do_float() { if (!is_return_type()) get_float(); }
906 inline void do_double() { if (!is_return_type()) get_double(); }
907 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
908 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
909 inline void do_void() { }
910
911 JavaCallArguments* arguments() { return _arguments; }
912 void push_receiver(Handle h) { _arguments->push_oop(h); }
913 };
914
915
916 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
917 protected:
918 va_list _ap;
919
920 inline void get_bool() {
921 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
922 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
923 // TemplateInterpreterGenerator::generate_result_handler_for and
924 // SharedRuntime::generate_native_wrapper.
925 jboolean b = va_arg(_ap, jint);
926 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
927 }
928 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
929 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
930 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
931 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
932
933 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
934
935 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
936 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
937 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
938 inline void get_object() { jobject l = va_arg(_ap, jobject);
939 _arguments->push_oop(Handle((oop *)l, false)); }
940
941 inline void set_ap(va_list rap) {
942 va_copy(_ap, rap);
943 }
944
945 public:
946 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
947 : JNI_ArgumentPusher(signature) {
948 set_ap(rap);
949 }
950 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
951 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
952 set_ap(rap);
953 }
954
955 // Optimized path if we have the bitvector form of signature
956 void iterate( uint64_t fingerprint ) {
957 if (fingerprint == (uint64_t)CONST64(-1)) {
958 SignatureIterator::iterate(); // Must be too many arguments
959 } else {
960 _return_type = (BasicType)((fingerprint >> static_feature_size) &
961 result_feature_mask);
962
963 assert(fingerprint, "Fingerprint should not be 0");
964 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
965 while ( 1 ) {
966 switch ( fingerprint & parameter_feature_mask ) {
967 case bool_parm:
968 get_bool();
969 break;
970 case char_parm:
971 get_char();
972 break;
973 case short_parm:
974 get_short();
975 break;
976 case byte_parm:
977 get_byte();
978 break;
979 case int_parm:
980 get_int();
981 break;
982 case obj_parm:
983 get_object();
984 break;
985 case long_parm:
986 get_long();
987 break;
988 case float_parm:
989 get_float();
990 break;
991 case double_parm:
992 get_double();
993 break;
994 case done_parm:
995 return;
996 break;
997 default:
998 ShouldNotReachHere();
999 break;
1000 }
1001 fingerprint >>= parameter_feature_size;
1002 }
1003 }
1004 }
1005 };
1006
1007
1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1009 protected:
1010 const jvalue *_ap;
1011
1012 inline void get_bool() {
1013 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1014 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1015 // TemplateInterpreterGenerator::generate_result_handler_for and
1016 // SharedRuntime::generate_native_wrapper.
1017 jboolean b = (_ap++)->z;
1018 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1019 }
1020 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1021 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1022 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1023 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1024
1025 inline void get_long() { _arguments->push_long((_ap++)->j); }
1026 inline void get_float() { _arguments->push_float((_ap++)->f); }
1027 inline void get_double() { _arguments->push_double((_ap++)->d);}
1028 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1029
1030 inline void set_ap(const jvalue *rap) { _ap = rap; }
1031
1032 public:
1033 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1034 : JNI_ArgumentPusher(signature) {
1035 set_ap(rap);
1036 }
1037 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1038 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1039 set_ap(rap);
1040 }
1041
1042 // Optimized path if we have the bitvector form of signature
1043 void iterate( uint64_t fingerprint ) {
1044 if (fingerprint == (uint64_t)CONST64(-1)) {
1045 SignatureIterator::iterate(); // Must be too many arguments
1046 } else {
1047 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1048 result_feature_mask);
1049 assert(fingerprint, "Fingerprint should not be 0");
1050 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1051 while ( 1 ) {
1052 switch ( fingerprint & parameter_feature_mask ) {
1053 case bool_parm:
1054 get_bool();
1055 break;
1056 case char_parm:
1057 get_char();
1058 break;
1059 case short_parm:
1060 get_short();
1061 break;
1062 case byte_parm:
1063 get_byte();
1064 break;
1065 case int_parm:
1066 get_int();
1067 break;
1068 case obj_parm:
1069 get_object();
1070 break;
1071 case long_parm:
1072 get_long();
1073 break;
1074 case float_parm:
1075 get_float();
1076 break;
1077 case double_parm:
1078 get_double();
1079 break;
1080 case done_parm:
1081 return;
1082 break;
1083 default:
1084 ShouldNotReachHere();
1085 break;
1086 }
1087 fingerprint >>= parameter_feature_size;
1088 }
1089 }
1090 }
1091 };
1092
1093
1094 enum JNICallType {
1095 JNI_STATIC,
1096 JNI_VIRTUAL,
1097 JNI_NONVIRTUAL
1098 };
1099
1100
1101
1102 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1103 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1104
1105 // Create object to hold arguments for the JavaCall, and associate it with
1106 // the jni parser
1107 ResourceMark rm(THREAD);
1108 int number_of_parameters = method->size_of_parameters();
1109 JavaCallArguments java_args(number_of_parameters);
1110 args->set_java_argument_object(&java_args);
1111
1112 assert(method->is_static(), "method should be static");
1113
1114 // Fill out JavaCallArguments object
1115 args->iterate( Fingerprinter(method).fingerprint() );
1116 // Initialize result type
1117 result->set_type(args->get_ret_type());
1118
1119 // Invoke the method. Result is returned as oop.
1120 JavaCalls::call(result, method, &java_args, CHECK);
1121
1122 // Convert result
1123 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1124 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1125 }
1126 }
1127
1128
1129 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1130 oop recv = JNIHandles::resolve(receiver);
1131 if (recv == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 Handle h_recv(THREAD, recv);
1135
1136 int number_of_parameters;
1137 Method* selected_method;
1138 {
1139 Method* m = Method::resolve_jmethod_id(method_id);
1140 number_of_parameters = m->size_of_parameters();
1141 Klass* holder = m->method_holder();
1142 if (call_type != JNI_VIRTUAL) {
1143 selected_method = m;
1144 } else if (!m->has_itable_index()) {
1145 // non-interface call -- for that little speed boost, don't handlize
1146 debug_only(NoSafepointVerifier nosafepoint;)
1147 // jni_GetMethodID makes sure class is linked and initialized
1148 // so m should have a valid vtable index.
1149 assert(m->valid_vtable_index(), "no valid vtable index");
1150 int vtbl_index = m->vtable_index();
1151 if (vtbl_index != Method::nonvirtual_vtable_index) {
1152 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1153 } else {
1154 // final method
1155 selected_method = m;
1156 }
1157 } else {
1158 // interface call
1159 KlassHandle h_holder(THREAD, holder);
1160
1161 int itbl_index = m->itable_index();
1162 Klass* k = h_recv->klass();
1163 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1164 }
1165 }
1166
1167 methodHandle method(THREAD, selected_method);
1168
1169 // Create object to hold arguments for the JavaCall, and associate it with
1170 // the jni parser
1171 ResourceMark rm(THREAD);
1172 JavaCallArguments java_args(number_of_parameters);
1173 args->set_java_argument_object(&java_args);
1174
1175 // handle arguments
1176 assert(!method->is_static(), "method should not be static");
1177 args->push_receiver(h_recv); // Push jobject handle
1178
1179 // Fill out JavaCallArguments object
1180 args->iterate( Fingerprinter(method).fingerprint() );
1181 // Initialize result type
1182 result->set_type(args->get_ret_type());
1183
1184 // Invoke the method. Result is returned as oop.
1185 JavaCalls::call(result, method, &java_args, CHECK);
1186
1187 // Convert result
1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1190 }
1191 }
1192
1193
1194 static instanceOop alloc_object(jclass clazz, TRAPS) {
1195 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1196 if (k == NULL) {
1197 ResourceMark rm(THREAD);
1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1199 }
1200 k()->check_valid_for_instantiation(false, CHECK_NULL);
1201 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1202 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1203 return ih;
1204 }
1205
1206 DT_RETURN_MARK_DECL(AllocObject, jobject
1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1208
1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1210 JNIWrapper("AllocObject");
1211
1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1213
1214 jobject ret = NULL;
1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1216
1217 instanceOop i = alloc_object(clazz, CHECK_NULL);
1218 ret = JNIHandles::make_local(env, i);
1219 return ret;
1220 JNI_END
1221
1222 DT_RETURN_MARK_DECL(NewObjectA, jobject
1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1224
1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1226 JNIWrapper("NewObjectA");
1227
1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1229
1230 jobject obj = NULL;
1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1232
1233 instanceOop i = alloc_object(clazz, CHECK_NULL);
1234 obj = JNIHandles::make_local(env, i);
1235 JavaValue jvalue(T_VOID);
1236 JNI_ArgumentPusherArray ap(methodID, args);
1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1238 return obj;
1239 JNI_END
1240
1241
1242 DT_RETURN_MARK_DECL(NewObjectV, jobject
1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1244
1245 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1246 JNIWrapper("NewObjectV");
1247
1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1249
1250 jobject obj = NULL;
1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1252
1253 instanceOop i = alloc_object(clazz, CHECK_NULL);
1254 obj = JNIHandles::make_local(env, i);
1255 JavaValue jvalue(T_VOID);
1256 JNI_ArgumentPusherVaArg ap(methodID, args);
1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1258 return obj;
1259 JNI_END
1260
1261
1262 DT_RETURN_MARK_DECL(NewObject, jobject
1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1264
1265 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1266 JNIWrapper("NewObject");
1267
1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1269
1270 jobject obj = NULL;
1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1272
1273 instanceOop i = alloc_object(clazz, CHECK_NULL);
1274 obj = JNIHandles::make_local(env, i);
1275 va_list args;
1276 va_start(args, methodID);
1277 JavaValue jvalue(T_VOID);
1278 JNI_ArgumentPusherVaArg ap(methodID, args);
1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1280 va_end(args);
1281 return obj;
1282 JNI_END
1283
1284
1285 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1286 JNIWrapper("GetObjectClass");
1287
1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1289
1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1291 jclass ret =
1292 (jclass) JNIHandles::make_local(env, k->java_mirror());
1293
1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1295 return ret;
1296 JNI_END
1297
1298 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1299 JNIWrapper("IsInstanceOf");
1300
1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1302
1303 jboolean ret = JNI_TRUE;
1304 if (obj != NULL) {
1305 ret = JNI_FALSE;
1306 Klass* k = java_lang_Class::as_Klass(
1307 JNIHandles::resolve_non_null(clazz));
1308 if (k != NULL) {
1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1310 }
1311 }
1312
1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1314 return ret;
1315 JNI_END
1316
1317
1318 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1319 const char *sig, bool is_static, TRAPS) {
1320 // %%%% This code should probably just call into a method in the LinkResolver
1321 //
1322 // The class should have been loaded (we have an instance of the class
1323 // passed in) so the method and signature should already be in the symbol
1324 // table. If they're not there, the method doesn't exist.
1325 const char *name_to_probe = (name_str == NULL)
1326 ? vmSymbols::object_initializer_name()->as_C_string()
1327 : name_str;
1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1330
1331 if (name == NULL || signature == NULL) {
1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1333 }
1334
1335 // Throw a NoSuchMethodError exception if we have an instance of a
1336 // primitive java.lang.Class
1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1339 }
1340
1341 KlassHandle klass(THREAD,
1342 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1343
1344 // Make sure class is linked and initialized before handing id's out to
1345 // Method*s.
1346 klass()->initialize(CHECK_NULL);
1347
1348 Method* m;
1349 if (name == vmSymbols::object_initializer_name() ||
1350 name == vmSymbols::class_initializer_name()) {
1351 // Never search superclasses for constructors
1352 if (klass->is_instance_klass()) {
1353 m = InstanceKlass::cast(klass())->find_method(name, signature);
1354 } else {
1355 m = NULL;
1356 }
1357 } else {
1358 m = klass->lookup_method(name, signature);
1359 if (m == NULL && klass->is_instance_klass()) {
1360 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1361 }
1362 }
1363 if (m == NULL || (m->is_static() != is_static)) {
1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1365 }
1366 return m->jmethod_id();
1367 }
1368
1369
1370 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1371 const char *name, const char *sig))
1372 JNIWrapper("GetMethodID");
1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1376 return ret;
1377 JNI_END
1378
1379
1380 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1381 const char *name, const char *sig))
1382 JNIWrapper("GetStaticMethodID");
1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1386 return ret;
1387 JNI_END
1388
1389
1390
1391 //
1392 // Calling Methods
1393 //
1394
1395
1396 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1397 , EntryProbe, ReturnProbe) \
1398 \
1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1400 , ReturnProbe); \
1401 \
1402 JNI_ENTRY(ResultType, \
1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1404 JNIWrapper("Call" XSTR(Result) "Method"); \
1405 \
1406 EntryProbe; \
1407 ResultType ret = 0;\
1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1409 (const ResultType&)ret);\
1410 \
1411 va_list args; \
1412 va_start(args, methodID); \
1413 JavaValue jvalue(Tag); \
1414 JNI_ArgumentPusherVaArg ap(methodID, args); \
1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1416 va_end(args); \
1417 ret = jvalue.get_##ResultType(); \
1418 return ret;\
1419 JNI_END
1420
1421 // the runtime type of subword integral basic types is integer
1422 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1431 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1434
1435 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jint, Int, T_INT,
1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1441 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1444 // Float and double probes don't return value because dtrace doesn't currently support it
1445 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1448 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1451
1452 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1453 , EntryProbe, ReturnProbe) \
1454 \
1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1456 , ReturnProbe); \
1457 \
1458 JNI_ENTRY(ResultType, \
1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1461 \
1462 EntryProbe;\
1463 ResultType ret = 0;\
1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1465 (const ResultType&)ret);\
1466 \
1467 JavaValue jvalue(Tag); \
1468 JNI_ArgumentPusherVaArg ap(methodID, args); \
1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1470 ret = jvalue.get_##ResultType(); \
1471 return ret;\
1472 JNI_END
1473
1474 // the runtime type of subword integral basic types is integer
1475 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1487
1488 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jint, Int, T_INT,
1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1494 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1497 // Float and double probes don't return value because dtrace doesn't currently support it
1498 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1501 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1504
1505 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1506 , EntryProbe, ReturnProbe) \
1507 \
1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1509 , ReturnProbe); \
1510 \
1511 JNI_ENTRY(ResultType, \
1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1514 EntryProbe; \
1515 ResultType ret = 0;\
1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1517 (const ResultType&)ret);\
1518 \
1519 JavaValue jvalue(Tag); \
1520 JNI_ArgumentPusherArray ap(methodID, args); \
1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1522 ret = jvalue.get_##ResultType(); \
1523 return ret;\
1524 JNI_END
1525
1526 // the runtime type of subword integral basic types is integer
1527 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1539
1540 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jint, Int, T_INT,
1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1546 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1549 // Float and double probes don't return value because dtrace doesn't currently support it
1550 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1553 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1556
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1560
1561
1562 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1563 JNIWrapper("CallVoidMethod");
1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1565 DT_VOID_RETURN_MARK(CallVoidMethod);
1566
1567 va_list args;
1568 va_start(args, methodID);
1569 JavaValue jvalue(T_VOID);
1570 JNI_ArgumentPusherVaArg ap(methodID, args);
1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1572 va_end(args);
1573 JNI_END
1574
1575
1576 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1577 JNIWrapper("CallVoidMethodV");
1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1579 DT_VOID_RETURN_MARK(CallVoidMethodV);
1580
1581 JavaValue jvalue(T_VOID);
1582 JNI_ArgumentPusherVaArg ap(methodID, args);
1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1584 JNI_END
1585
1586
1587 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1588 JNIWrapper("CallVoidMethodA");
1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1590 DT_VOID_RETURN_MARK(CallVoidMethodA);
1591
1592 JavaValue jvalue(T_VOID);
1593 JNI_ArgumentPusherArray ap(methodID, args);
1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1595 JNI_END
1596
1597
1598
1599 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1600 , EntryProbe, ReturnProbe) \
1601 \
1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1603 , ReturnProbe);\
1604 \
1605 JNI_ENTRY(ResultType, \
1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1608 \
1609 EntryProbe;\
1610 ResultType ret;\
1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1612 (const ResultType&)ret);\
1613 \
1614 va_list args; \
1615 va_start(args, methodID); \
1616 JavaValue jvalue(Tag); \
1617 JNI_ArgumentPusherVaArg ap(methodID, args); \
1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1619 va_end(args); \
1620 ret = jvalue.get_##ResultType(); \
1621 return ret;\
1622 JNI_END
1623
1624 // the runtime type of subword integral basic types is integer
1625 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1637
1638 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1644 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1646 // Float and double probes don't return value because dtrace doesn't currently support it
1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1651 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1654
1655 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1656 , EntryProbe, ReturnProbe) \
1657 \
1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1659 , ReturnProbe);\
1660 \
1661 JNI_ENTRY(ResultType, \
1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1664 \
1665 EntryProbe;\
1666 ResultType ret;\
1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1668 (const ResultType&)ret);\
1669 \
1670 JavaValue jvalue(Tag); \
1671 JNI_ArgumentPusherVaArg ap(methodID, args); \
1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1673 ret = jvalue.get_##ResultType(); \
1674 return ret;\
1675 JNI_END
1676
1677 // the runtime type of subword integral basic types is integer
1678 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1690
1691 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1697 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1699 // Float and double probes don't return value because dtrace doesn't currently support it
1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1704 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1707
1708 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1709 , EntryProbe, ReturnProbe) \
1710 \
1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1712 , ReturnProbe);\
1713 \
1714 JNI_ENTRY(ResultType, \
1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1717 \
1718 EntryProbe;\
1719 ResultType ret;\
1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1721 (const ResultType&)ret);\
1722 \
1723 JavaValue jvalue(Tag); \
1724 JNI_ArgumentPusherArray ap(methodID, args); \
1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1726 ret = jvalue.get_##ResultType(); \
1727 return ret;\
1728 JNI_END
1729
1730 // the runtime type of subword integral basic types is integer
1731 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1743
1744 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1750 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1752 // Float and double probes don't return value because dtrace doesn't currently support it
1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1757 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1760
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1767
1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1769 JNIWrapper("CallNonvirtualVoidMethod");
1770
1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1773
1774 va_list args;
1775 va_start(args, methodID);
1776 JavaValue jvalue(T_VOID);
1777 JNI_ArgumentPusherVaArg ap(methodID, args);
1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1779 va_end(args);
1780 JNI_END
1781
1782
1783 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1784 JNIWrapper("CallNonvirtualVoidMethodV");
1785
1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1787 env, obj, cls, (uintptr_t) methodID);
1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1789
1790 JavaValue jvalue(T_VOID);
1791 JNI_ArgumentPusherVaArg ap(methodID, args);
1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1793 JNI_END
1794
1795
1796 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1797 JNIWrapper("CallNonvirtualVoidMethodA");
1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1799 env, obj, cls, (uintptr_t) methodID);
1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1801 JavaValue jvalue(T_VOID);
1802 JNI_ArgumentPusherArray ap(methodID, args);
1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1804 JNI_END
1805
1806
1807
1808 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1809 , EntryProbe, ResultProbe) \
1810 \
1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1812 , ResultProbe); \
1813 \
1814 JNI_ENTRY(ResultType, \
1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1817 \
1818 EntryProbe; \
1819 ResultType ret = 0;\
1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1821 (const ResultType&)ret);\
1822 \
1823 va_list args; \
1824 va_start(args, methodID); \
1825 JavaValue jvalue(Tag); \
1826 JNI_ArgumentPusherVaArg ap(methodID, args); \
1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1828 va_end(args); \
1829 ret = jvalue.get_##ResultType(); \
1830 return ret;\
1831 JNI_END
1832
1833 // the runtime type of subword integral basic types is integer
1834 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1843 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1846
1847 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1853 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1856 // Float and double probes don't return value because dtrace doesn't currently support it
1857 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1860 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1863
1864 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1865 , EntryProbe, ResultProbe) \
1866 \
1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1868 , ResultProbe); \
1869 \
1870 JNI_ENTRY(ResultType, \
1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1873 \
1874 EntryProbe; \
1875 ResultType ret = 0;\
1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1877 (const ResultType&)ret);\
1878 \
1879 JavaValue jvalue(Tag); \
1880 JNI_ArgumentPusherVaArg ap(methodID, args); \
1881 /* Make sure class is initialized before trying to invoke its method */ \
1882 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1883 k()->initialize(CHECK_0); \
1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1885 va_end(args); \
1886 ret = jvalue.get_##ResultType(); \
1887 return ret;\
1888 JNI_END
1889
1890 // the runtime type of subword integral basic types is integer
1891 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1900 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1903
1904 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1910 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1913 // Float and double probes don't return value because dtrace doesn't currently support it
1914 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1917 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1920
1921 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1922 , EntryProbe, ResultProbe) \
1923 \
1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1925 , ResultProbe); \
1926 \
1927 JNI_ENTRY(ResultType, \
1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1930 \
1931 EntryProbe; \
1932 ResultType ret = 0;\
1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1934 (const ResultType&)ret);\
1935 \
1936 JavaValue jvalue(Tag); \
1937 JNI_ArgumentPusherArray ap(methodID, args); \
1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1939 ret = jvalue.get_##ResultType(); \
1940 return ret;\
1941 JNI_END
1942
1943 // the runtime type of subword integral basic types is integer
1944 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1956
1957 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1963 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1966 // Float and double probes don't return value because dtrace doesn't currently support it
1967 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1970 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1973
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1980
1981 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1982 JNIWrapper("CallStaticVoidMethod");
1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1985
1986 va_list args;
1987 va_start(args, methodID);
1988 JavaValue jvalue(T_VOID);
1989 JNI_ArgumentPusherVaArg ap(methodID, args);
1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1991 va_end(args);
1992 JNI_END
1993
1994
1995 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1996 JNIWrapper("CallStaticVoidMethodV");
1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1999
2000 JavaValue jvalue(T_VOID);
2001 JNI_ArgumentPusherVaArg ap(methodID, args);
2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2003 JNI_END
2004
2005
2006 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2007 JNIWrapper("CallStaticVoidMethodA");
2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2010
2011 JavaValue jvalue(T_VOID);
2012 JNI_ArgumentPusherArray ap(methodID, args);
2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2014 JNI_END
2015
2016
2017 //
2018 // Accessing Fields
2019 //
2020
2021
2022 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2024
2025 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2026 const char *name, const char *sig))
2027 JNIWrapper("GetFieldID");
2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2029 jfieldID ret = 0;
2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2031
2032 // The class should have been loaded (we have an instance of the class
2033 // passed in) so the field and signature should already be in the symbol
2034 // table. If they're not there, the field doesn't exist.
2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2037 if (fieldname == NULL || signame == NULL) {
2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2039 }
2040 KlassHandle k(THREAD,
2041 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2042 // Make sure class is initialized before handing id's out to fields
2043 k()->initialize(CHECK_NULL);
2044
2045 fieldDescriptor fd;
2046 if (!k()->is_instance_klass() ||
2047 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2048 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2049 }
2050
2051 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2052 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2053 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2054 return ret;
2055 JNI_END
2056
2057
2058 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2059 JNIWrapper("GetObjectField");
2060 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2061 oop o = JNIHandles::resolve_non_null(obj);
2062 Klass* k = o->klass();
2063 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2064 // Keep JVMTI addition small and only check enabled flag here.
2065 // jni_GetField_probe() assumes that is okay to create handles.
2066 if (JvmtiExport::should_post_field_access()) {
2067 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2068 }
2069 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2070 #if INCLUDE_ALL_GCS
2071 // If G1 is enabled and we are accessing the value of the referent
2072 // field in a reference object then we need to register a non-null
2073 // referent with the SATB barrier.
2074 if (UseG1GC || UseShenandoahGC) {
2075 bool needs_barrier = false;
2076
2077 if (ret != NULL &&
2078 offset == java_lang_ref_Reference::referent_offset &&
2079 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2080 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2081 needs_barrier = true;
2082 }
2083
2084 if (needs_barrier) {
2085 oop referent = JNIHandles::resolve(ret);
2086 G1SATBCardTableModRefBS::enqueue(referent);
2087 }
2088 }
2089 #endif // INCLUDE_ALL_GCS
2090 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2091 return ret;
2092 JNI_END
2093
2094
2095
2096 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2097 , EntryProbe, ReturnProbe) \
2098 \
2099 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2100 , ReturnProbe); \
2101 \
2102 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2103 JNIWrapper("Get" XSTR(Result) "Field"); \
2104 \
2105 EntryProbe; \
2106 Return ret = 0;\
2107 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2108 \
2109 oop o = JNIHandles::resolve_non_null(obj); \
2110 Klass* k = o->klass(); \
2111 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2112 /* Keep JVMTI addition small and only check enabled flag here. */ \
2113 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2114 /* and creates a ResetNoHandleMark. */ \
2115 if (JvmtiExport::should_post_field_access()) { \
2116 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2117 } \
2118 ret = o->Fieldname##_field(offset); \
2119 return ret; \
2120 JNI_END
2121
2122 DEFINE_GETFIELD(jboolean, bool, Boolean
2123 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2125 DEFINE_GETFIELD(jbyte, byte, Byte
2126 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2128 DEFINE_GETFIELD(jchar, char, Char
2129 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jshort, short, Short
2132 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jint, int, Int
2135 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2137 DEFINE_GETFIELD(jlong, long, Long
2138 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2140 // Float and double probes don't return value because dtrace doesn't currently support it
2141 DEFINE_GETFIELD(jfloat, float, Float
2142 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2143 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2144 DEFINE_GETFIELD(jdouble, double, Double
2145 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2146 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2147
2148 address jni_GetBooleanField_addr() {
2149 return (address)jni_GetBooleanField;
2150 }
2151 address jni_GetByteField_addr() {
2152 return (address)jni_GetByteField;
2153 }
2154 address jni_GetCharField_addr() {
2155 return (address)jni_GetCharField;
2156 }
2157 address jni_GetShortField_addr() {
2158 return (address)jni_GetShortField;
2159 }
2160 address jni_GetIntField_addr() {
2161 return (address)jni_GetIntField;
2162 }
2163 address jni_GetLongField_addr() {
2164 return (address)jni_GetLongField;
2165 }
2166 address jni_GetFloatField_addr() {
2167 return (address)jni_GetFloatField;
2168 }
2169 address jni_GetDoubleField_addr() {
2170 return (address)jni_GetDoubleField;
2171 }
2172
2173 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2174 JNIWrapper("SetObjectField");
2175 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2176 oop o = JNIHandles::resolve_non_null(obj);
2177 Klass* k = o->klass();
2178 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2179 // Keep JVMTI addition small and only check enabled flag here.
2180 // jni_SetField_probe_nh() assumes that is not okay to create handles
2181 // and creates a ResetNoHandleMark.
2182 if (JvmtiExport::should_post_field_modification()) {
2183 jvalue field_value;
2184 field_value.l = value;
2185 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2186 }
2187 o->obj_field_put(offset, JNIHandles::resolve(value));
2188 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2189 JNI_END
2190
2191
2192 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2193 , EntryProbe, ReturnProbe) \
2194 \
2195 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2196 JNIWrapper("Set" XSTR(Result) "Field"); \
2197 \
2198 EntryProbe; \
2199 \
2200 oop o = JNIHandles::resolve_non_null(obj); \
2201 Klass* k = o->klass(); \
2202 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2203 /* Keep JVMTI addition small and only check enabled flag here. */ \
2204 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2205 /* and creates a ResetNoHandleMark. */ \
2206 if (JvmtiExport::should_post_field_modification()) { \
2207 jvalue field_value; \
2208 field_value.unionType = value; \
2209 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2210 } \
2211 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2212 o->Fieldname##_field_put(offset, value); \
2213 ReturnProbe; \
2214 JNI_END
2215
2216 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2217 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2219 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2220 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2222 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2223 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2225 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2226 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2228 DEFINE_SETFIELD(jint, int, Int, 'I', i
2229 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230 HOTSPOT_JNI_SETINTFIELD_RETURN())
2231 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2232 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2234 // Float and double probes don't return value because dtrace doesn't currently support it
2235 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2236 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2237 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2238 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2239 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2240 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2241
2242 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2243 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2244
2245 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2246 JNIWrapper("ToReflectedField");
2247 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2248 jobject ret = NULL;
2249 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2250
2251 fieldDescriptor fd;
2252 bool found = false;
2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2254
2255 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2256
2257 if (isStatic) {
2258 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2260 assert(id->is_static_field_id(), "invalid static field id");
2261 found = id->find_local_field(&fd);
2262 } else {
2263 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2264 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2265 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2266 }
2267 assert(found, "bad fieldID passed into jni_ToReflectedField");
2268 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2269 ret = JNIHandles::make_local(env, reflected);
2270 return ret;
2271 JNI_END
2272
2273
2274 //
2275 // Accessing Static Fields
2276 //
2277 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2278 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2279
2280 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2281 const char *name, const char *sig))
2282 JNIWrapper("GetStaticFieldID");
2283 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2284 jfieldID ret = NULL;
2285 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2286
2287 // The class should have been loaded (we have an instance of the class
2288 // passed in) so the field and signature should already be in the symbol
2289 // table. If they're not there, the field doesn't exist.
2290 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2291 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2292 if (fieldname == NULL || signame == NULL) {
2293 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2294 }
2295 KlassHandle k(THREAD,
2296 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2297 // Make sure class is initialized before handing id's out to static fields
2298 k()->initialize(CHECK_NULL);
2299
2300 fieldDescriptor fd;
2301 if (!k()->is_instance_klass() ||
2302 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2303 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2304 }
2305
2306 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2307 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2308 debug_only(id->set_is_static_field_id();)
2309
2310 debug_only(id->verify(fd.field_holder()));
2311
2312 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2313 return ret;
2314 JNI_END
2315
2316
2317 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2318 JNIWrapper("GetStaticObjectField");
2319 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2320 #if INCLUDE_JNI_CHECK
2321 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2322 #endif // INCLUDE_JNI_CHECK
2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2324 assert(id->is_static_field_id(), "invalid static field id");
2325 // Keep JVMTI addition small and only check enabled flag here.
2326 // jni_GetField_probe() assumes that is okay to create handles.
2327 if (JvmtiExport::should_post_field_access()) {
2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2329 }
2330 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2331 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2332 return ret;
2333 JNI_END
2334
2335
2336 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2337 , EntryProbe, ReturnProbe) \
2338 \
2339 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2340 , ReturnProbe); \
2341 \
2342 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2343 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2344 EntryProbe; \
2345 Return ret = 0;\
2346 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2347 (const Return&)ret);\
2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2349 assert(id->is_static_field_id(), "invalid static field id"); \
2350 /* Keep JVMTI addition small and only check enabled flag here. */ \
2351 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2352 if (JvmtiExport::should_post_field_access()) { \
2353 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2354 } \
2355 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2356 return ret;\
2357 JNI_END
2358
2359 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2360 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2361 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2362 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2363 DEFINE_GETSTATICFIELD(jchar, char, Char
2364 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2365 DEFINE_GETSTATICFIELD(jshort, short, Short
2366 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2367 DEFINE_GETSTATICFIELD(jint, int, Int
2368 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2369 DEFINE_GETSTATICFIELD(jlong, long, Long
2370 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2371 // Float and double probes don't return value because dtrace doesn't currently support it
2372 DEFINE_GETSTATICFIELD(jfloat, float, Float
2373 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2374 DEFINE_GETSTATICFIELD(jdouble, double, Double
2375 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2376
2377 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2378 JNIWrapper("SetStaticObjectField");
2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2381 assert(id->is_static_field_id(), "invalid static field id");
2382 // Keep JVMTI addition small and only check enabled flag here.
2383 // jni_SetField_probe() assumes that is okay to create handles.
2384 if (JvmtiExport::should_post_field_modification()) {
2385 jvalue field_value;
2386 field_value.l = value;
2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2388 }
2389 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2391 JNI_END
2392
2393
2394
2395 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2396 , EntryProbe, ReturnProbe) \
2397 \
2398 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2399 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2400 EntryProbe; \
2401 \
2402 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2403 assert(id->is_static_field_id(), "invalid static field id"); \
2404 /* Keep JVMTI addition small and only check enabled flag here. */ \
2405 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2406 if (JvmtiExport::should_post_field_modification()) { \
2407 jvalue field_value; \
2408 field_value.unionType = value; \
2409 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2410 } \
2411 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2412 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2413 ReturnProbe;\
2414 JNI_END
2415
2416 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2417 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2418 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2419 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2420 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2421 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2422 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2423 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2424 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2426 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2428 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2429 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2430 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2431 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2432 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2433 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2434 // Float and double probes don't return value because dtrace doesn't currently support it
2435 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2436 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2437 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2438 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2439 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2440 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2441
2442 //
2443 // String Operations
2444 //
2445
2446 // Unicode Interface
2447
2448 DT_RETURN_MARK_DECL(NewString, jstring
2449 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2450
2451 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2452 JNIWrapper("NewString");
2453 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2454 jstring ret = NULL;
2455 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2456 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2457 ret = (jstring) JNIHandles::make_local(env, string);
2458 return ret;
2459 JNI_END
2460
2461
2462 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2463 JNIWrapper("GetStringLength");
2464 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2465 jsize ret = 0;
2466 oop s = JNIHandles::resolve_non_null(string);
2467 if (java_lang_String::value(s) != NULL) {
2468 ret = java_lang_String::length(s);
2469 }
2470 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2471 return ret;
2472 JNI_END
2473
2474
2475 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2476 JNIEnv *env, jstring string, jboolean *isCopy))
2477 JNIWrapper("GetStringChars");
2478 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2479 jchar* buf = NULL;
2480 oop s = JNIHandles::resolve_non_null(string);
2481 typeArrayOop s_value = java_lang_String::value(s);
2482 if (s_value != NULL) {
2483 int s_len = java_lang_String::length(s);
2484 bool is_latin1 = java_lang_String::is_latin1(s);
2485 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2486 /* JNI Specification states return NULL on OOM */
2487 if (buf != NULL) {
2488 if (s_len > 0) {
2489 if (!is_latin1) {
2490 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2491 } else {
2492 for (int i = 0; i < s_len; i++) {
2493 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2494 }
2495 }
2496 }
2497 buf[s_len] = 0;
2498 //%note jni_5
2499 if (isCopy != NULL) {
2500 *isCopy = JNI_TRUE;
2501 }
2502 }
2503 }
2504 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2505 return buf;
2506 JNI_END
2507
2508
2509 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2510 JNIWrapper("ReleaseStringChars");
2511 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2512 //%note jni_6
2513 if (chars != NULL) {
2514 // Since String objects are supposed to be immutable, don't copy any
2515 // new data back. A bad user will have to go after the char array.
2516 FreeHeap((void*) chars);
2517 }
2518 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2519 JNI_END
2520
2521
2522 // UTF Interface
2523
2524 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2525 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2526
2527 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2528 JNIWrapper("NewStringUTF");
2529 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2530 jstring ret;
2531 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2532
2533 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2534 ret = (jstring) JNIHandles::make_local(env, result);
2535 return ret;
2536 JNI_END
2537
2538
2539 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2540 JNIWrapper("GetStringUTFLength");
2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2542 jsize ret = 0;
2543 oop java_string = JNIHandles::resolve_non_null(string);
2544 if (java_lang_String::value(java_string) != NULL) {
2545 ret = java_lang_String::utf8_length(java_string);
2546 }
2547 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2548 return ret;
2549 JNI_END
2550
2551
2552 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2553 JNIWrapper("GetStringUTFChars");
2554 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2555 char* result = NULL;
2556 oop java_string = JNIHandles::resolve_non_null(string);
2557 if (java_lang_String::value(java_string) != NULL) {
2558 size_t length = java_lang_String::utf8_length(java_string);
2559 /* JNI Specification states return NULL on OOM */
2560 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2561 if (result != NULL) {
2562 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2563 if (isCopy != NULL) {
2564 *isCopy = JNI_TRUE;
2565 }
2566 }
2567 }
2568 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2569 return result;
2570 JNI_END
2571
2572
2573 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2574 JNIWrapper("ReleaseStringUTFChars");
2575 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2576 if (chars != NULL) {
2577 FreeHeap((char*) chars);
2578 }
2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2580 JNI_END
2581
2582
2583 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2584 JNIWrapper("GetArrayLength");
2585 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2586 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2587 assert(a->is_array(), "must be array");
2588 jsize ret = a->length();
2589 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2590 return ret;
2591 JNI_END
2592
2593
2594 //
2595 // Object Array Operations
2596 //
2597
2598 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2599 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2600
2601 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2602 JNIWrapper("NewObjectArray");
2603 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2604 jobjectArray ret = NULL;
2605 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2606 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2607 Klass* ako = ek()->array_klass(CHECK_NULL);
2608 KlassHandle ak = KlassHandle(THREAD, ako);
2609 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2610 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2611 oop initial_value = JNIHandles::resolve(initialElement);
2612 if (initial_value != NULL) { // array already initialized with NULL
2613 for (int index = 0; index < length; index++) {
2614 result->obj_at_put(index, initial_value);
2615 }
2616 }
2617 ret = (jobjectArray) JNIHandles::make_local(env, result);
2618 return ret;
2619 JNI_END
2620
2621 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2622 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2623
2624 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2625 JNIWrapper("GetObjectArrayElement");
2626 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2627 jobject ret = NULL;
2628 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2630 if (a->is_within_bounds(index)) {
2631 ret = JNIHandles::make_local(env, a->obj_at(index));
2632 return ret;
2633 } else {
2634 char buf[jintAsStringSize];
2635 sprintf(buf, "%d", index);
2636 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2637 }
2638 JNI_END
2639
2640 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2641 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2642
2643 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2644 JNIWrapper("SetObjectArrayElement");
2645 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2646 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2647
2648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2649 oop v = JNIHandles::resolve(value);
2650 if (a->is_within_bounds(index)) {
2651 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2652 a->obj_at_put(index, v);
2653 } else {
2654 THROW(vmSymbols::java_lang_ArrayStoreException());
2655 }
2656 } else {
2657 char buf[jintAsStringSize];
2658 sprintf(buf, "%d", index);
2659 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2660 }
2661 JNI_END
2662
2663
2664
2665 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2666 ,EntryProbe,ReturnProbe) \
2667 \
2668 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2669 , ReturnProbe); \
2670 \
2671 JNI_ENTRY(Return, \
2672 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2673 JNIWrapper("New" XSTR(Result) "Array"); \
2674 EntryProbe; \
2675 Return ret = NULL;\
2676 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2677 \
2678 oop obj= oopFactory::Allocator(len, CHECK_0); \
2679 ret = (Return) JNIHandles::make_local(env, obj); \
2680 return ret;\
2681 JNI_END
2682
2683 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2684 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2687 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2690 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2693 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2696 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2699 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2701 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2702 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2703 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2704 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2705 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2706 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2707
2708 // Return an address which will fault if the caller writes to it.
2709
2710 static char* get_bad_address() {
2711 static char* bad_address = NULL;
2712 if (bad_address == NULL) {
2713 size_t size = os::vm_allocation_granularity();
2714 bad_address = os::reserve_memory(size);
2715 if (bad_address != NULL) {
2716 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2717 /*is_committed*/false);
2718 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2719 }
2720 }
2721 return bad_address;
2722 }
2723
2724
2725
2726 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2727 , EntryProbe, ReturnProbe) \
2728 \
2729 JNI_QUICK_ENTRY(ElementType*, \
2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2732 EntryProbe; \
2733 /* allocate an chunk of memory in c land */ \
2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2735 a = typeArrayOop(oopDesc::bs()->read_barrier(a)); \
2736 ElementType* result; \
2737 int len = a->length(); \
2738 if (len == 0) { \
2739 /* Empty array: legal but useless, can't return NULL. \
2740 * Return a pointer to something useless. \
2741 * Avoid asserts in typeArrayOop. */ \
2742 result = (ElementType*)get_bad_address(); \
2743 } else { \
2744 /* JNI Specification states return NULL on OOM */ \
2745 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2746 if (result != NULL) { \
2747 /* copy the array to the c chunk */ \
2748 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2749 if (isCopy) { \
2750 *isCopy = JNI_TRUE; \
2751 } \
2752 } \
2753 } \
2754 ReturnProbe; \
2755 return result; \
2756 JNI_END
2757
2758 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2759 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2760 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2761 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2762 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2765 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2766 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2767 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2768 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2769 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2770 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2771 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2772 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2774 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2776 // Float and double probes don't return value because dtrace doesn't currently support it
2777 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2778 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2779 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2780 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2781 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2782 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2783
2784
2785 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2786 , EntryProbe, ReturnProbe);\
2787 \
2788 JNI_QUICK_ENTRY(void, \
2789 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2790 ElementType *buf, jint mode)) \
2791 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2792 EntryProbe; \
2793 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2794 a = typeArrayOop(oopDesc::bs()->write_barrier(a)); \
2795 int len = a->length(); \
2796 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2797 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2798 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2799 } \
2800 if ((mode == 0) || (mode == JNI_ABORT)) { \
2801 FreeHeap(buf); \
2802 } \
2803 } \
2804 ReturnProbe; \
2805 JNI_END
2806
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2808 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2809 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2811 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2812 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2814 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2815 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2817 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2818 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2820 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2821 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2823 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2824 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2826 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2827 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2829 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2830 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2831
2832
2833 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2834 , EntryProbe, ReturnProbe); \
2835 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2836 , ReturnProbe); \
2837 \
2838 JNI_ENTRY(void, \
2839 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2840 jsize len, ElementType *buf)) \
2841 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2842 EntryProbe; \
2843 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2844 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2845 src = typeArrayOop(oopDesc::bs()->read_barrier(src)); \
2846 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2847 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2848 } else { \
2849 if (len > 0) { \
2850 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2851 memcpy((u_char*) buf, \
2852 (u_char*) src->Tag##_at_addr(start), \
2853 len << sc); \
2854 } \
2855 } \
2856 JNI_END
2857
2858 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2859 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2860 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2862 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2863 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2865 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2866 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2868 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2869 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2871 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2872 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2873 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2874 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2875 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2876 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2877 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2878 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2879 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2880 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2881 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2882
2883
2884 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2885 , EntryProbe, ReturnProbe); \
2886 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2887 ,ReturnProbe); \
2888 \
2889 JNI_ENTRY(void, \
2890 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2891 jsize len, const ElementType *buf)) \
2892 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2893 EntryProbe; \
2894 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2895 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2896 dst = typeArrayOop(oopDesc::bs()->write_barrier(dst)); \
2897 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2898 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2899 } else { \
2900 if (len > 0) { \
2901 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2902 memcpy((u_char*) dst->Tag##_at_addr(start), \
2903 (u_char*) buf, \
2904 len << sc); \
2905 } \
2906 } \
2907 JNI_END
2908
2909 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2910 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2911 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2912 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2913 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2914 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2915 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2916 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2917 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2918 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2919 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2920 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2921 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2922 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2923 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2924 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2925 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2926 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2927 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2928 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2929 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2930 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2931 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2932 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2933
2934
2935 //
2936 // Interception of natives
2937 //
2938
2939 // The RegisterNatives call being attempted tried to register with a method that
2940 // is not native. Ask JVM TI what prefixes have been specified. Then check
2941 // to see if the native method is now wrapped with the prefixes. See the
2942 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2943 static Method* find_prefixed_native(KlassHandle k,
2944 Symbol* name, Symbol* signature, TRAPS) {
2945 #if INCLUDE_JVMTI
2946 ResourceMark rm(THREAD);
2947 Method* method;
2948 int name_len = name->utf8_length();
2949 char* name_str = name->as_utf8();
2950 int prefix_count;
2951 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2952 for (int i = 0; i < prefix_count; i++) {
2953 char* prefix = prefixes[i];
2954 int prefix_len = (int)strlen(prefix);
2955
2956 // try adding this prefix to the method name and see if it matches another method name
2957 int trial_len = name_len + prefix_len;
2958 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2959 strcpy(trial_name_str, prefix);
2960 strcat(trial_name_str, name_str);
2961 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2962 if (trial_name == NULL) {
2963 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2964 }
2965 method = k()->lookup_method(trial_name, signature);
2966 if (method == NULL) {
2967 continue; // signature doesn't match, try the next prefix
2968 }
2969 if (method->is_native()) {
2970 method->set_is_prefixed_native();
2971 return method; // wahoo, we found a prefixed version of the method, return it
2972 }
2973 // found as non-native, so prefix is good, add it, probably just need more prefixes
2974 name_len = trial_len;
2975 name_str = trial_name_str;
2976 }
2977 #endif // INCLUDE_JVMTI
2978 return NULL; // not found
2979 }
2980
2981 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2982 Method* method = k()->lookup_method(name, signature);
2983 if (method == NULL) {
2984 ResourceMark rm;
2985 stringStream st;
2986 st.print("Method %s name or signature does not match",
2987 Method::name_and_sig_as_C_string(k(), name, signature));
2988 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2989 }
2990 if (!method->is_native()) {
2991 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2992 method = find_prefixed_native(k, name, signature, THREAD);
2993 if (method == NULL) {
2994 ResourceMark rm;
2995 stringStream st;
2996 st.print("Method %s is not declared as native",
2997 Method::name_and_sig_as_C_string(k(), name, signature));
2998 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2999 }
3000 }
3001
3002 if (entry != NULL) {
3003 method->set_native_function(entry,
3004 Method::native_bind_event_is_interesting);
3005 } else {
3006 method->clear_native_function();
3007 }
3008 if (PrintJNIResolving) {
3009 ResourceMark rm(THREAD);
3010 tty->print_cr("[Registering JNI native method %s.%s]",
3011 method->method_holder()->external_name(),
3012 method->name()->as_C_string());
3013 }
3014 return true;
3015 }
3016
3017 DT_RETURN_MARK_DECL(RegisterNatives, jint
3018 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3019
3020 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3021 const JNINativeMethod *methods,
3022 jint nMethods))
3023 JNIWrapper("RegisterNatives");
3024 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3025 jint ret = 0;
3026 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3027
3028 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3029
3030 for (int index = 0; index < nMethods; index++) {
3031 const char* meth_name = methods[index].name;
3032 const char* meth_sig = methods[index].signature;
3033 int meth_name_len = (int)strlen(meth_name);
3034
3035 // The class should have been loaded (we have an instance of the class
3036 // passed in) so the method and signature should already be in the symbol
3037 // table. If they're not there, the method doesn't exist.
3038 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3039 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3040
3041 if (name == NULL || signature == NULL) {
3042 ResourceMark rm;
3043 stringStream st;
3044 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3045 // Must return negative value on failure
3046 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3047 }
3048
3049 bool res = register_native(h_k, name, signature,
3050 (address) methods[index].fnPtr, THREAD);
3051 if (!res) {
3052 ret = -1;
3053 break;
3054 }
3055 }
3056 return ret;
3057 JNI_END
3058
3059
3060 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3061 JNIWrapper("UnregisterNatives");
3062 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3063 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3064 //%note jni_2
3065 if (k->is_instance_klass()) {
3066 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3067 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3068 if (m->is_native()) {
3069 m->clear_native_function();
3070 m->set_signature_handler(NULL);
3071 }
3072 }
3073 }
3074 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3075 return 0;
3076 JNI_END
3077
3078 //
3079 // Monitor functions
3080 //
3081
3082 DT_RETURN_MARK_DECL(MonitorEnter, jint
3083 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3084
3085 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3086 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3087 jint ret = JNI_ERR;
3088 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3089
3090 // If the object is null, we can't do anything with it
3091 if (jobj == NULL) {
3092 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3093 }
3094
3095 Handle obj(thread, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3096 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3097 ret = JNI_OK;
3098 return ret;
3099 JNI_END
3100
3101 DT_RETURN_MARK_DECL(MonitorExit, jint
3102 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3103
3104 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3105 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3106 jint ret = JNI_ERR;
3107 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3108
3109 // Don't do anything with a null object
3110 if (jobj == NULL) {
3111 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3112 }
3113
3114 Handle obj(THREAD, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3115 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3116
3117 ret = JNI_OK;
3118 return ret;
3119 JNI_END
3120
3121 //
3122 // Extensions
3123 //
3124
3125 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3126 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3127
3128 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3129 JNIWrapper("GetStringRegion");
3130 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3131 DT_VOID_RETURN_MARK(GetStringRegion);
3132 oop s = JNIHandles::resolve_non_null(string);
3133 int s_len = java_lang_String::length(s);
3134 if (start < 0 || len < 0 || start + len > s_len) {
3135 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3136 } else {
3137 if (len > 0) {
3138 typeArrayOop s_value = java_lang_String::value(s);
3139 bool is_latin1 = java_lang_String::is_latin1(s);
3140 if (!is_latin1) {
3141 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3142 } else {
3143 for (int i = 0; i < len; i++) {
3144 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3145 }
3146 }
3147 }
3148 }
3149 JNI_END
3150
3151 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3152 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3153
3154 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3155 JNIWrapper("GetStringUTFRegion");
3156 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3157 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3158 oop s = JNIHandles::resolve_non_null(string);
3159 int s_len = java_lang_String::length(s);
3160 if (start < 0 || len < 0 || start + len > s_len) {
3161 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3162 } else {
3163 //%note jni_7
3164 if (len > 0) {
3165 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3166 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3167 // as_utf8_string null-terminates the result string
3168 } else {
3169 // JDK null-terminates the buffer even in len is zero
3170 if (buf != NULL) {
3171 buf[0] = 0;
3172 }
3173 }
3174 }
3175 JNI_END
3176
3177
3178 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3179 JNIWrapper("GetPrimitiveArrayCritical");
3180 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3181 GCLocker::lock_critical(thread);
3182 if (isCopy != NULL) {
3183 *isCopy = JNI_FALSE;
3184 }
3185 oop a = JNIHandles::resolve_non_null(array);
3186 a = oopDesc::bs()->write_barrier(a);
3187 Universe::heap()->enter_critical(a);
3188 assert(a->is_array(), "just checking");
3189 BasicType type;
3190 if (a->is_objArray()) {
3191 type = T_OBJECT;
3192 } else {
3193 type = TypeArrayKlass::cast(a->klass())->element_type();
3194 }
3195 void* ret = arrayOop(a)->base(type);
3196 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3197 return ret;
3198 JNI_END
3199
3200
3201 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3202 JNIWrapper("ReleasePrimitiveArrayCritical");
3203 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3204 // The array, carray and mode arguments are ignored
3205 oop a = JNIHandles::resolve_non_null(array);
3206 a = oopDesc::bs()->read_barrier(a);
3207 #ifdef ASSERT
3208 assert(a->is_array(), "just checking");
3209 BasicType type;
3210 if (a->is_objArray()) {
3211 type = T_OBJECT;
3212 } else {
3213 type = TypeArrayKlass::cast(a->klass())->element_type();
3214 }
3215 void* ret = arrayOop(a)->base(type);
3216 assert(ret == carray, "check array not moved");
3217 #endif
3218
3219 Universe::heap()->exit_critical(a);
3220 GCLocker::unlock_critical(thread);
3221 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3222 JNI_END
3223
3224
3225 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3226 JNIWrapper("GetStringCritical");
3227 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3228 GCLocker::lock_critical(thread);
3229 oop s = JNIHandles::resolve_non_null(string);
3230 s = oopDesc::bs()->write_barrier(s);
3231 Universe::heap()->enter_critical(s);
3232 typeArrayOop s_value = java_lang_String::value(s);
3233 bool is_latin1 = java_lang_String::is_latin1(s);
3234 if (isCopy != NULL) {
3235 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3236 }
3237 jchar* ret;
3238 if (!is_latin1) {
3239 ret = (jchar*) s_value->base(T_CHAR);
3240 } else {
3241 // Inflate latin1 encoded string to UTF16
3242 int s_len = java_lang_String::length(s);
3243 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3244 /* JNI Specification states return NULL on OOM */
3245 if (ret != NULL) {
3246 for (int i = 0; i < s_len; i++) {
3247 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3248 }
3249 ret[s_len] = 0;
3250 }
3251 }
3252 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3253 return ret;
3254 JNI_END
3255
3256
3257 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3258 JNIWrapper("ReleaseStringCritical");
3259 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3260 // The str and chars arguments are ignored for UTF16 strings
3261 oop s = JNIHandles::resolve_non_null(str);
3262 s = oopDesc::bs()->read_barrier(s);
3263 Universe::heap()->exit_critical(s);
3264 bool is_latin1 = java_lang_String::is_latin1(s);
3265 if (is_latin1) {
3266 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3267 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3268 FREE_C_HEAP_ARRAY(jchar, chars);
3269 }
3270 GCLocker::unlock_critical(thread);
3271 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3272 JNI_END
3273
3274
3275 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3276 JNIWrapper("jni_NewWeakGlobalRef");
3277 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3278 Handle ref_handle(thread, JNIHandles::resolve(ref));
3279 jweak ret = JNIHandles::make_weak_global(ref_handle);
3280 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3281 return ret;
3282 JNI_END
3283
3284 // Must be JNI_ENTRY (with HandleMark)
3285 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3286 JNIWrapper("jni_DeleteWeakGlobalRef");
3287 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3288 JNIHandles::destroy_weak_global(ref);
3289 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3290 JNI_END
3291
3292
3293 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3294 JNIWrapper("jni_ExceptionCheck");
3295 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3296 jni_check_async_exceptions(thread);
3297 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3298 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3299 return ret;
3300 JNI_END
3301
3302
3303 // Initialization state for three routines below relating to
3304 // java.nio.DirectBuffers
3305 static jint directBufferSupportInitializeStarted = 0;
3306 static volatile jint directBufferSupportInitializeEnded = 0;
3307 static volatile jint directBufferSupportInitializeFailed = 0;
3308 static jclass bufferClass = NULL;
3309 static jclass directBufferClass = NULL;
3310 static jclass directByteBufferClass = NULL;
3311 static jmethodID directByteBufferConstructor = NULL;
3312 static jfieldID directBufferAddressField = NULL;
3313 static jfieldID bufferCapacityField = NULL;
3314
3315 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3316 Handle loader; // null (bootstrap) loader
3317 Handle protection_domain; // null protection domain
3318
3319 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3320 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3321
3322 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3323 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3324 }
3325 return result;
3326 }
3327
3328 // These lookups are done with the NULL (bootstrap) ClassLoader to
3329 // circumvent any security checks that would be done by jni_FindClass.
3330 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3331 {
3332 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3333 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3334 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3335 return true;
3336 }
3337 JNI_END
3338
3339
3340 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3341 if (directBufferSupportInitializeFailed) {
3342 return false;
3343 }
3344
3345 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3346 if (!lookupDirectBufferClasses(env)) {
3347 directBufferSupportInitializeFailed = 1;
3348 return false;
3349 }
3350
3351 // Make global references for these
3352 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3353 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3354 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3355
3356 // Get needed field and method IDs
3357 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3358 if (env->ExceptionCheck()) {
3359 env->ExceptionClear();
3360 directBufferSupportInitializeFailed = 1;
3361 return false;
3362 }
3363 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3364 if (env->ExceptionCheck()) {
3365 env->ExceptionClear();
3366 directBufferSupportInitializeFailed = 1;
3367 return false;
3368 }
3369 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3370 if (env->ExceptionCheck()) {
3371 env->ExceptionClear();
3372 directBufferSupportInitializeFailed = 1;
3373 return false;
3374 }
3375
3376 if ((directByteBufferConstructor == NULL) ||
3377 (directBufferAddressField == NULL) ||
3378 (bufferCapacityField == NULL)) {
3379 directBufferSupportInitializeFailed = 1;
3380 return false;
3381 }
3382
3383 directBufferSupportInitializeEnded = 1;
3384 } else {
3385 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3386 os::naked_yield();
3387 }
3388 }
3389
3390 return !directBufferSupportInitializeFailed;
3391 }
3392
3393 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3394 {
3395 // thread_from_jni_environment() will block if VM is gone.
3396 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3397
3398 JNIWrapper("jni_NewDirectByteBuffer");
3399 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3400
3401 if (!directBufferSupportInitializeEnded) {
3402 if (!initializeDirectBufferSupport(env, thread)) {
3403 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3404 return NULL;
3405 }
3406 }
3407
3408 // Being paranoid about accidental sign extension on address
3409 jlong addr = (jlong) ((uintptr_t) address);
3410 // NOTE that package-private DirectByteBuffer constructor currently
3411 // takes int capacity
3412 jint cap = (jint) capacity;
3413 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3414 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3415 return ret;
3416 }
3417
3418 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3419 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3420
3421 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3422 {
3423 // thread_from_jni_environment() will block if VM is gone.
3424 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3425
3426 JNIWrapper("jni_GetDirectBufferAddress");
3427 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3428 void* ret = NULL;
3429 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3430
3431 if (!directBufferSupportInitializeEnded) {
3432 if (!initializeDirectBufferSupport(env, thread)) {
3433 return 0;
3434 }
3435 }
3436
3437 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3438 return 0;
3439 }
3440
3441 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3442 return ret;
3443 }
3444
3445 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3446 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3447
3448 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3449 {
3450 // thread_from_jni_environment() will block if VM is gone.
3451 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3452
3453 JNIWrapper("jni_GetDirectBufferCapacity");
3454 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3455 jlong ret = -1;
3456 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3457
3458 if (!directBufferSupportInitializeEnded) {
3459 if (!initializeDirectBufferSupport(env, thread)) {
3460 ret = 0;
3461 return ret;
3462 }
3463 }
3464
3465 if (buf == NULL) {
3466 return -1;
3467 }
3468
3469 if (!env->IsInstanceOf(buf, directBufferClass)) {
3470 return -1;
3471 }
3472
3473 // NOTE that capacity is currently an int in the implementation
3474 ret = env->GetIntField(buf, bufferCapacityField);
3475 return ret;
3476 }
3477
3478
3479 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3480 JNIWrapper("GetVersion");
3481 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3482 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3483 return CurrentVersion;
3484 JNI_END
3485
3486 extern struct JavaVM_ main_vm;
3487
3488 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3489 JNIWrapper("jni_GetJavaVM");
3490 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3491 *vm = (JavaVM *)(&main_vm);
3492 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3493 return JNI_OK;
3494 JNI_END
3495
3496
3497 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3498 JNIWrapper("GetModule");
3499 return Modules::get_module(clazz, THREAD);
3500 JNI_END
3501
3502
3503 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2))
3504 JNIWrapper("AddModuleReads");
3505 if (m1 == NULL || m2 == NULL) {
3506 THROW(vmSymbols::java_lang_NullPointerException());
3507 }
3508 JavaValue result(T_VOID);
3509 Handle m1_h(THREAD, JNIHandles::resolve(m1));
3510 if (!java_lang_reflect_Module::is_instance(m1_h())) {
3511 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object");
3512 }
3513 Handle m2_h(THREAD, JNIHandles::resolve(m2));
3514 if (!java_lang_reflect_Module::is_instance(m2_h())) {
3515 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object");
3516 }
3517 JavaCalls::call_static(&result,
3518 KlassHandle(THREAD, SystemDictionary::module_Modules_klass()),
3519 vmSymbols::addReads_name(),
3520 vmSymbols::addReads_signature(),
3521 m1_h,
3522 m2_h,
3523 THREAD);
3524 JNI_END
3525
3526
3527 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2))
3528 JNIWrapper("CanReadModule");
3529 if (m1 == NULL || m2 == NULL) {
3530 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3531 }
3532 jboolean res = Modules::can_read_module(m1, m2, CHECK_false);
3533 return res;
3534 JNI_END
3535
3536
3537 // Structure containing all jni functions
3538 struct JNINativeInterface_ jni_NativeInterface = {
3539 NULL,
3540 NULL,
3541 NULL,
3542
3543 NULL,
3544
3545 jni_GetVersion,
3546
3547 jni_DefineClass,
3548 jni_FindClass,
3549
3550 jni_FromReflectedMethod,
3551 jni_FromReflectedField,
3552
3553 jni_ToReflectedMethod,
3554
3555 jni_GetSuperclass,
3556 jni_IsAssignableFrom,
3557
3558 jni_ToReflectedField,
3559
3560 jni_Throw,
3561 jni_ThrowNew,
3562 jni_ExceptionOccurred,
3563 jni_ExceptionDescribe,
3564 jni_ExceptionClear,
3565 jni_FatalError,
3566
3567 jni_PushLocalFrame,
3568 jni_PopLocalFrame,
3569
3570 jni_NewGlobalRef,
3571 jni_DeleteGlobalRef,
3572 jni_DeleteLocalRef,
3573 jni_IsSameObject,
3574
3575 jni_NewLocalRef,
3576 jni_EnsureLocalCapacity,
3577
3578 jni_AllocObject,
3579 jni_NewObject,
3580 jni_NewObjectV,
3581 jni_NewObjectA,
3582
3583 jni_GetObjectClass,
3584 jni_IsInstanceOf,
3585
3586 jni_GetMethodID,
3587
3588 jni_CallObjectMethod,
3589 jni_CallObjectMethodV,
3590 jni_CallObjectMethodA,
3591 jni_CallBooleanMethod,
3592 jni_CallBooleanMethodV,
3593 jni_CallBooleanMethodA,
3594 jni_CallByteMethod,
3595 jni_CallByteMethodV,
3596 jni_CallByteMethodA,
3597 jni_CallCharMethod,
3598 jni_CallCharMethodV,
3599 jni_CallCharMethodA,
3600 jni_CallShortMethod,
3601 jni_CallShortMethodV,
3602 jni_CallShortMethodA,
3603 jni_CallIntMethod,
3604 jni_CallIntMethodV,
3605 jni_CallIntMethodA,
3606 jni_CallLongMethod,
3607 jni_CallLongMethodV,
3608 jni_CallLongMethodA,
3609 jni_CallFloatMethod,
3610 jni_CallFloatMethodV,
3611 jni_CallFloatMethodA,
3612 jni_CallDoubleMethod,
3613 jni_CallDoubleMethodV,
3614 jni_CallDoubleMethodA,
3615 jni_CallVoidMethod,
3616 jni_CallVoidMethodV,
3617 jni_CallVoidMethodA,
3618
3619 jni_CallNonvirtualObjectMethod,
3620 jni_CallNonvirtualObjectMethodV,
3621 jni_CallNonvirtualObjectMethodA,
3622 jni_CallNonvirtualBooleanMethod,
3623 jni_CallNonvirtualBooleanMethodV,
3624 jni_CallNonvirtualBooleanMethodA,
3625 jni_CallNonvirtualByteMethod,
3626 jni_CallNonvirtualByteMethodV,
3627 jni_CallNonvirtualByteMethodA,
3628 jni_CallNonvirtualCharMethod,
3629 jni_CallNonvirtualCharMethodV,
3630 jni_CallNonvirtualCharMethodA,
3631 jni_CallNonvirtualShortMethod,
3632 jni_CallNonvirtualShortMethodV,
3633 jni_CallNonvirtualShortMethodA,
3634 jni_CallNonvirtualIntMethod,
3635 jni_CallNonvirtualIntMethodV,
3636 jni_CallNonvirtualIntMethodA,
3637 jni_CallNonvirtualLongMethod,
3638 jni_CallNonvirtualLongMethodV,
3639 jni_CallNonvirtualLongMethodA,
3640 jni_CallNonvirtualFloatMethod,
3641 jni_CallNonvirtualFloatMethodV,
3642 jni_CallNonvirtualFloatMethodA,
3643 jni_CallNonvirtualDoubleMethod,
3644 jni_CallNonvirtualDoubleMethodV,
3645 jni_CallNonvirtualDoubleMethodA,
3646 jni_CallNonvirtualVoidMethod,
3647 jni_CallNonvirtualVoidMethodV,
3648 jni_CallNonvirtualVoidMethodA,
3649
3650 jni_GetFieldID,
3651
3652 jni_GetObjectField,
3653 jni_GetBooleanField,
3654 jni_GetByteField,
3655 jni_GetCharField,
3656 jni_GetShortField,
3657 jni_GetIntField,
3658 jni_GetLongField,
3659 jni_GetFloatField,
3660 jni_GetDoubleField,
3661
3662 jni_SetObjectField,
3663 jni_SetBooleanField,
3664 jni_SetByteField,
3665 jni_SetCharField,
3666 jni_SetShortField,
3667 jni_SetIntField,
3668 jni_SetLongField,
3669 jni_SetFloatField,
3670 jni_SetDoubleField,
3671
3672 jni_GetStaticMethodID,
3673
3674 jni_CallStaticObjectMethod,
3675 jni_CallStaticObjectMethodV,
3676 jni_CallStaticObjectMethodA,
3677 jni_CallStaticBooleanMethod,
3678 jni_CallStaticBooleanMethodV,
3679 jni_CallStaticBooleanMethodA,
3680 jni_CallStaticByteMethod,
3681 jni_CallStaticByteMethodV,
3682 jni_CallStaticByteMethodA,
3683 jni_CallStaticCharMethod,
3684 jni_CallStaticCharMethodV,
3685 jni_CallStaticCharMethodA,
3686 jni_CallStaticShortMethod,
3687 jni_CallStaticShortMethodV,
3688 jni_CallStaticShortMethodA,
3689 jni_CallStaticIntMethod,
3690 jni_CallStaticIntMethodV,
3691 jni_CallStaticIntMethodA,
3692 jni_CallStaticLongMethod,
3693 jni_CallStaticLongMethodV,
3694 jni_CallStaticLongMethodA,
3695 jni_CallStaticFloatMethod,
3696 jni_CallStaticFloatMethodV,
3697 jni_CallStaticFloatMethodA,
3698 jni_CallStaticDoubleMethod,
3699 jni_CallStaticDoubleMethodV,
3700 jni_CallStaticDoubleMethodA,
3701 jni_CallStaticVoidMethod,
3702 jni_CallStaticVoidMethodV,
3703 jni_CallStaticVoidMethodA,
3704
3705 jni_GetStaticFieldID,
3706
3707 jni_GetStaticObjectField,
3708 jni_GetStaticBooleanField,
3709 jni_GetStaticByteField,
3710 jni_GetStaticCharField,
3711 jni_GetStaticShortField,
3712 jni_GetStaticIntField,
3713 jni_GetStaticLongField,
3714 jni_GetStaticFloatField,
3715 jni_GetStaticDoubleField,
3716
3717 jni_SetStaticObjectField,
3718 jni_SetStaticBooleanField,
3719 jni_SetStaticByteField,
3720 jni_SetStaticCharField,
3721 jni_SetStaticShortField,
3722 jni_SetStaticIntField,
3723 jni_SetStaticLongField,
3724 jni_SetStaticFloatField,
3725 jni_SetStaticDoubleField,
3726
3727 jni_NewString,
3728 jni_GetStringLength,
3729 jni_GetStringChars,
3730 jni_ReleaseStringChars,
3731
3732 jni_NewStringUTF,
3733 jni_GetStringUTFLength,
3734 jni_GetStringUTFChars,
3735 jni_ReleaseStringUTFChars,
3736
3737 jni_GetArrayLength,
3738
3739 jni_NewObjectArray,
3740 jni_GetObjectArrayElement,
3741 jni_SetObjectArrayElement,
3742
3743 jni_NewBooleanArray,
3744 jni_NewByteArray,
3745 jni_NewCharArray,
3746 jni_NewShortArray,
3747 jni_NewIntArray,
3748 jni_NewLongArray,
3749 jni_NewFloatArray,
3750 jni_NewDoubleArray,
3751
3752 jni_GetBooleanArrayElements,
3753 jni_GetByteArrayElements,
3754 jni_GetCharArrayElements,
3755 jni_GetShortArrayElements,
3756 jni_GetIntArrayElements,
3757 jni_GetLongArrayElements,
3758 jni_GetFloatArrayElements,
3759 jni_GetDoubleArrayElements,
3760
3761 jni_ReleaseBooleanArrayElements,
3762 jni_ReleaseByteArrayElements,
3763 jni_ReleaseCharArrayElements,
3764 jni_ReleaseShortArrayElements,
3765 jni_ReleaseIntArrayElements,
3766 jni_ReleaseLongArrayElements,
3767 jni_ReleaseFloatArrayElements,
3768 jni_ReleaseDoubleArrayElements,
3769
3770 jni_GetBooleanArrayRegion,
3771 jni_GetByteArrayRegion,
3772 jni_GetCharArrayRegion,
3773 jni_GetShortArrayRegion,
3774 jni_GetIntArrayRegion,
3775 jni_GetLongArrayRegion,
3776 jni_GetFloatArrayRegion,
3777 jni_GetDoubleArrayRegion,
3778
3779 jni_SetBooleanArrayRegion,
3780 jni_SetByteArrayRegion,
3781 jni_SetCharArrayRegion,
3782 jni_SetShortArrayRegion,
3783 jni_SetIntArrayRegion,
3784 jni_SetLongArrayRegion,
3785 jni_SetFloatArrayRegion,
3786 jni_SetDoubleArrayRegion,
3787
3788 jni_RegisterNatives,
3789 jni_UnregisterNatives,
3790
3791 jni_MonitorEnter,
3792 jni_MonitorExit,
3793
3794 jni_GetJavaVM,
3795
3796 jni_GetStringRegion,
3797 jni_GetStringUTFRegion,
3798
3799 jni_GetPrimitiveArrayCritical,
3800 jni_ReleasePrimitiveArrayCritical,
3801
3802 jni_GetStringCritical,
3803 jni_ReleaseStringCritical,
3804
3805 jni_NewWeakGlobalRef,
3806 jni_DeleteWeakGlobalRef,
3807
3808 jni_ExceptionCheck,
3809
3810 jni_NewDirectByteBuffer,
3811 jni_GetDirectBufferAddress,
3812 jni_GetDirectBufferCapacity,
3813
3814 // New 1_6 features
3815
3816 jni_GetObjectRefType,
3817
3818 // Module features
3819
3820 jni_GetModule,
3821 jni_AddModuleReads,
3822 jni_CanReadModule
3823 };
3824
3825
3826 // For jvmti use to modify jni function table.
3827 // Java threads in native contiues to run until it is transitioned
3828 // to VM at safepoint. Before the transition or before it is blocked
3829 // for safepoint it may access jni function table. VM could crash if
3830 // any java thread access the jni function table in the middle of memcpy.
3831 // To avoid this each function pointers are copied automically.
3832 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3833 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3834 intptr_t *a = (intptr_t *) jni_functions();
3835 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3836 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3837 Atomic::store_ptr(*b++, a++);
3838 }
3839 }
3840
3841 void quicken_jni_functions() {
3842 // Replace Get<Primitive>Field with fast versions
3843 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3844 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3845 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3846 // windows x86 currently needs SEH wrapper and the gain of the fast
3847 // versions currently isn't certain for server vm on uniprocessor.
3848 && os::is_MP()
3849 #endif
3850 ) {
3851 address func;
3852 func = JNI_FastGetField::generate_fast_get_boolean_field();
3853 if (func != (address)-1) {
3854 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3855 }
3856 func = JNI_FastGetField::generate_fast_get_byte_field();
3857 if (func != (address)-1) {
3858 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3859 }
3860 func = JNI_FastGetField::generate_fast_get_char_field();
3861 if (func != (address)-1) {
3862 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3863 }
3864 func = JNI_FastGetField::generate_fast_get_short_field();
3865 if (func != (address)-1) {
3866 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3867 }
3868 func = JNI_FastGetField::generate_fast_get_int_field();
3869 if (func != (address)-1) {
3870 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3871 }
3872 func = JNI_FastGetField::generate_fast_get_long_field();
3873 if (func != (address)-1) {
3874 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3875 }
3876 func = JNI_FastGetField::generate_fast_get_float_field();
3877 if (func != (address)-1) {
3878 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3879 }
3880 func = JNI_FastGetField::generate_fast_get_double_field();
3881 if (func != (address)-1) {
3882 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3883 }
3884 }
3885 }
3886
3887 // Returns the function structure
3888 struct JNINativeInterface_* jni_functions() {
3889 #if INCLUDE_JNI_CHECK
3890 if (CheckJNICalls) return jni_functions_check();
3891 #endif // INCLUDE_JNI_CHECK
3892 return &jni_NativeInterface;
3893 }
3894
3895 // Returns the function structure
3896 struct JNINativeInterface_* jni_functions_nocheck() {
3897 return &jni_NativeInterface;
3898 }
3899
3900
3901 // Invocation API
3902
3903
3904 // Forward declaration
3905 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3906
3907 // Global invocation API vars
3908 volatile jint vm_created = 0;
3909 // Indicate whether it is safe to recreate VM
3910 volatile jint safe_to_recreate_vm = 1;
3911 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3912
3913
3914 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3915 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3916
3917 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3918 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3919
3920 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3921 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3922 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3923 jint ret = JNI_ERR;
3924 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3925
3926 if (Threads::is_supported_jni_version(args->version)) {
3927 ret = JNI_OK;
3928 }
3929 // 1.1 style no longer supported in hotspot.
3930 // According the JNI spec, we should update args->version on return.
3931 // We also use the structure to communicate with launcher about default
3932 // stack size.
3933 if (args->version == JNI_VERSION_1_1) {
3934 args->version = JNI_VERSION_1_2;
3935 // javaStackSize is int in arguments structure
3936 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3937 args->javaStackSize = (jint)(ThreadStackSize * K);
3938 }
3939 return ret;
3940 }
3941
3942 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3943 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3944
3945 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3946 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3947
3948 jint result = JNI_ERR;
3949 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3950
3951 // We're about to use Atomic::xchg for synchronization. Some Zero
3952 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3953 // but __sync_lock_test_and_set is not guaranteed to do what we want
3954 // on all architectures. So we check it works before relying on it.
3955 #if defined(ZERO) && defined(ASSERT)
3956 {
3957 jint a = 0xcafebabe;
3958 jint b = Atomic::xchg(0xdeadbeef, &a);
3959 void *c = &a;
3960 void *d = Atomic::xchg_ptr(&b, &c);
3961 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3962 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3963 }
3964 #endif // ZERO && ASSERT
3965
3966 // At the moment it's only possible to have one Java VM,
3967 // since some of the runtime state is in global variables.
3968
3969 // We cannot use our mutex locks here, since they only work on
3970 // Threads. We do an atomic compare and exchange to ensure only
3971 // one thread can call this method at a time
3972
3973 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3974 // the add/dec implementations are dependent on whether we are running
3975 // on a multiprocessor, and at this stage of initialization the os::is_MP
3976 // function used to determine this will always return false. Atomic::xchg
3977 // does not have this problem.
3978 if (Atomic::xchg(1, &vm_created) == 1) {
3979 return JNI_EEXIST; // already created, or create attempt in progress
3980 }
3981 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3982 return JNI_ERR; // someone tried and failed and retry not allowed.
3983 }
3984
3985 assert(vm_created == 1, "vm_created is true during the creation");
3986
3987 /**
3988 * Certain errors during initialization are recoverable and do not
3989 * prevent this method from being called again at a later time
3990 * (perhaps with different arguments). However, at a certain
3991 * point during initialization if an error occurs we cannot allow
3992 * this function to be called again (or it will crash). In those
3993 * situations, the 'canTryAgain' flag is set to false, which atomically
3994 * sets safe_to_recreate_vm to 1, such that any new call to
3995 * JNI_CreateJavaVM will immediately fail using the above logic.
3996 */
3997 bool can_try_again = true;
3998
3999 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
4000 if (result == JNI_OK) {
4001 JavaThread *thread = JavaThread::current();
4002 assert(!thread->has_pending_exception(), "should have returned not OK");
4003 /* thread is thread_in_vm here */
4004 *vm = (JavaVM *)(&main_vm);
4005 *(JNIEnv**)penv = thread->jni_environment();
4006
4007 #if INCLUDE_JVMCI
4008 if (EnableJVMCI) {
4009 if (UseJVMCICompiler) {
4010 // JVMCI is initialized on a CompilerThread
4011 if (BootstrapJVMCI) {
4012 JavaThread* THREAD = thread;
4013 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
4014 compiler->bootstrap(THREAD);
4015 if (HAS_PENDING_EXCEPTION) {
4016 HandleMark hm;
4017 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4018 }
4019 }
4020 }
4021 }
4022 #endif
4023
4024 // Tracks the time application was running before GC
4025 RuntimeService::record_application_start();
4026
4027 // Notify JVMTI
4028 if (JvmtiExport::should_post_thread_life()) {
4029 JvmtiExport::post_thread_start(thread);
4030 }
4031
4032 EventThreadStart event;
4033 if (event.should_commit()) {
4034 event.set_thread(THREAD_TRACE_ID(thread));
4035 event.commit();
4036 }
4037
4038 #ifndef PRODUCT
4039 // Check if we should compile all classes on bootclasspath
4040 if (CompileTheWorld) ClassLoader::compile_the_world();
4041 if (ReplayCompiles) ciReplay::replay(thread);
4042
4043 // Some platforms (like Win*) need a wrapper around these test
4044 // functions in order to properly handle error conditions.
4045 test_error_handler();
4046 if (ExecuteInternalVMTests) {
4047 InternalVMTests::run();
4048 }
4049 #endif
4050
4051 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4052 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4053 } else {
4054 // If create_vm exits because of a pending exception, exit with that
4055 // exception. In the future when we figure out how to reclaim memory,
4056 // we may be able to exit with JNI_ERR and allow the calling application
4057 // to continue.
4058 if (Universe::is_fully_initialized()) {
4059 // otherwise no pending exception possible - VM will already have aborted
4060 JavaThread* THREAD = JavaThread::current();
4061 if (HAS_PENDING_EXCEPTION) {
4062 HandleMark hm;
4063 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4064 }
4065 }
4066
4067 if (can_try_again) {
4068 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4069 safe_to_recreate_vm = 1;
4070 }
4071
4072 // Creation failed. We must reset vm_created
4073 *vm = 0;
4074 *(JNIEnv**)penv = 0;
4075 // reset vm_created last to avoid race condition. Use OrderAccess to
4076 // control both compiler and architectural-based reordering.
4077 OrderAccess::release_store(&vm_created, 0);
4078 }
4079
4080 // Flush stdout and stderr before exit.
4081 fflush(stdout);
4082 fflush(stderr);
4083
4084 return result;
4085
4086 }
4087
4088 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4089 jint result = 0;
4090 // On Windows, let CreateJavaVM run with SEH protection
4091 #ifdef _WIN32
4092 __try {
4093 #endif
4094 result = JNI_CreateJavaVM_inner(vm, penv, args);
4095 #ifdef _WIN32
4096 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4097 // Nothing to do.
4098 }
4099 #endif
4100 return result;
4101 }
4102
4103 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4104 // See bug 4367188, the wrapper can sometimes cause VM crashes
4105 // JNIWrapper("GetCreatedJavaVMs");
4106
4107 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4108
4109 if (vm_created) {
4110 if (numVMs != NULL) *numVMs = 1;
4111 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4112 } else {
4113 if (numVMs != NULL) *numVMs = 0;
4114 }
4115 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4116 return JNI_OK;
4117 }
4118
4119 extern "C" {
4120
4121 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4122 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4123
4124 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4125 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4126 jint res = JNI_ERR;
4127 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4128
4129 if (!vm_created) {
4130 res = JNI_ERR;
4131 return res;
4132 }
4133
4134 JNIWrapper("DestroyJavaVM");
4135 JNIEnv *env;
4136 JavaVMAttachArgs destroyargs;
4137 destroyargs.version = CurrentVersion;
4138 destroyargs.name = (char *)"DestroyJavaVM";
4139 destroyargs.group = NULL;
4140 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4141 if (res != JNI_OK) {
4142 return res;
4143 }
4144
4145 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4146 JavaThread* thread = JavaThread::current();
4147 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4148 if (Threads::destroy_vm()) {
4149 // Should not change thread state, VM is gone
4150 vm_created = false;
4151 res = JNI_OK;
4152 return res;
4153 } else {
4154 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4155 res = JNI_ERR;
4156 return res;
4157 }
4158 }
4159
4160
4161 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4162 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4163
4164 // Check below commented out from JDK1.2fcs as well
4165 /*
4166 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4167 return JNI_EVERSION;
4168 }
4169 */
4170
4171 Thread* t = Thread::current_or_null();
4172 if (t != NULL) {
4173 // If the thread has been attached this operation is a no-op
4174 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4175 return JNI_OK;
4176 }
4177
4178 // Create a thread and mark it as attaching so it will be skipped by the
4179 // ThreadsListEnumerator - see CR 6404306
4180 JavaThread* thread = new JavaThread(true);
4181
4182 // Set correct safepoint info. The thread is going to call into Java when
4183 // initializing the Java level thread object. Hence, the correct state must
4184 // be set in order for the Safepoint code to deal with it correctly.
4185 thread->set_thread_state(_thread_in_vm);
4186 thread->record_stack_base_and_size();
4187 thread->initialize_thread_current();
4188
4189 if (!os::create_attached_thread(thread)) {
4190 delete thread;
4191 return JNI_ERR;
4192 }
4193 // Enable stack overflow checks
4194 thread->create_stack_guard_pages();
4195
4196 thread->initialize_tlab();
4197
4198 thread->cache_global_variables();
4199
4200 // Crucial that we do not have a safepoint check for this thread, since it has
4201 // not been added to the Thread list yet.
4202 { Threads_lock->lock_without_safepoint_check();
4203 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4204 // avoid this thread trying to do a GC before it is added to the thread-list
4205 thread->set_active_handles(JNIHandleBlock::allocate_block());
4206 Threads::add(thread, daemon);
4207 Threads_lock->unlock();
4208 }
4209 // Create thread group and name info from attach arguments
4210 oop group = NULL;
4211 char* thread_name = NULL;
4212 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4213 group = JNIHandles::resolve(args->group);
4214 thread_name = args->name; // may be NULL
4215 }
4216 if (group == NULL) group = Universe::main_thread_group();
4217
4218 // Create Java level thread object and attach it to this thread
4219 bool attach_failed = false;
4220 {
4221 EXCEPTION_MARK;
4222 HandleMark hm(THREAD);
4223 Handle thread_group(THREAD, group);
4224 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4225 if (HAS_PENDING_EXCEPTION) {
4226 CLEAR_PENDING_EXCEPTION;
4227 // cleanup outside the handle mark.
4228 attach_failed = true;
4229 }
4230 }
4231
4232 if (attach_failed) {
4233 // Added missing cleanup
4234 thread->cleanup_failed_attach_current_thread();
4235 return JNI_ERR;
4236 }
4237
4238 // mark the thread as no longer attaching
4239 // this uses a fence to push the change through so we don't have
4240 // to regrab the threads_lock
4241 thread->set_done_attaching_via_jni();
4242
4243 // Set java thread status.
4244 java_lang_Thread::set_thread_status(thread->threadObj(),
4245 java_lang_Thread::RUNNABLE);
4246
4247 // Notify the debugger
4248 if (JvmtiExport::should_post_thread_life()) {
4249 JvmtiExport::post_thread_start(thread);
4250 }
4251
4252 EventThreadStart event;
4253 if (event.should_commit()) {
4254 event.set_thread(THREAD_TRACE_ID(thread));
4255 event.commit();
4256 }
4257
4258 *(JNIEnv**)penv = thread->jni_environment();
4259
4260 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4261 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4262 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4263 // needed.
4264
4265 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4266
4267 // Perform any platform dependent FPU setup
4268 os::setup_fpu();
4269
4270 return JNI_OK;
4271 }
4272
4273
4274 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4275 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4276 if (!vm_created) {
4277 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4278 return JNI_ERR;
4279 }
4280
4281 JNIWrapper("AttachCurrentThread");
4282 jint ret = attach_current_thread(vm, penv, _args, false);
4283 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4284 return ret;
4285 }
4286
4287
4288 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4289 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4290 VM_Exit::block_if_vm_exited();
4291
4292 JNIWrapper("DetachCurrentThread");
4293
4294 // If the thread has already been detached the operation is a no-op
4295 if (Thread::current_or_null() == NULL) {
4296 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4297 return JNI_OK;
4298 }
4299
4300 JavaThread* thread = JavaThread::current();
4301 if (thread->has_last_Java_frame()) {
4302 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4303 // Can't detach a thread that's running java, that can't work.
4304 return JNI_ERR;
4305 }
4306
4307 // Safepoint support. Have to do call-back to safepoint code, if in the
4308 // middel of a safepoint operation
4309 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4310
4311 // XXX: Note that JavaThread::exit() call below removes the guards on the
4312 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4313 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4314 // of the guards is visible in jni_AttachCurrentThread above,
4315 // the removal of the guards is buried below in JavaThread::exit()
4316 // here. The abstraction should be more symmetrically either exposed
4317 // or hidden (e.g. it could probably be hidden in the same
4318 // (platform-dependent) methods where we do alternate stack
4319 // maintenance work?)
4320 thread->exit(false, JavaThread::jni_detach);
4321 delete thread;
4322
4323 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4324 return JNI_OK;
4325 }
4326
4327 DT_RETURN_MARK_DECL(GetEnv, jint
4328 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4329
4330 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4331 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4332 jint ret = JNI_ERR;
4333 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4334
4335 if (!vm_created) {
4336 *penv = NULL;
4337 ret = JNI_EDETACHED;
4338 return ret;
4339 }
4340
4341 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4342 return ret;
4343 }
4344
4345 #ifndef JVMPI_VERSION_1
4346 // need these in order to be polite about older agents
4347 #define JVMPI_VERSION_1 ((jint)0x10000001)
4348 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4349 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4350 #endif // !JVMPI_VERSION_1
4351
4352 Thread* thread = Thread::current_or_null();
4353 if (thread != NULL && thread->is_Java_thread()) {
4354 if (Threads::is_supported_jni_version_including_1_1(version)) {
4355 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4356 ret = JNI_OK;
4357 return ret;
4358
4359 } else if (version == JVMPI_VERSION_1 ||
4360 version == JVMPI_VERSION_1_1 ||
4361 version == JVMPI_VERSION_1_2) {
4362 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4363 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4364 ret = JNI_EVERSION;
4365 return ret;
4366 } else if (JvmtiExport::is_jvmdi_version(version)) {
4367 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4368 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4369 ret = JNI_EVERSION;
4370 return ret;
4371 } else {
4372 *penv = NULL;
4373 ret = JNI_EVERSION;
4374 return ret;
4375 }
4376 } else {
4377 *penv = NULL;
4378 ret = JNI_EDETACHED;
4379 return ret;
4380 }
4381 }
4382
4383
4384 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4385 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4386 if (!vm_created) {
4387 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4388 return JNI_ERR;
4389 }
4390
4391 JNIWrapper("AttachCurrentThreadAsDaemon");
4392 jint ret = attach_current_thread(vm, penv, _args, true);
4393 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4394 return ret;
4395 }
4396
4397
4398 } // End extern "C"
4399
4400 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4401 NULL,
4402 NULL,
4403 NULL,
4404
4405 jni_DestroyJavaVM,
4406 jni_AttachCurrentThread,
4407 jni_DetachCurrentThread,
4408 jni_GetEnv,
4409 jni_AttachCurrentThreadAsDaemon
4410 };