1 /*
2 * Copyright (c) 1997, 2015, 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/classLoader.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/dependencies.hpp"
35 #include "gc/shared/gcLocker.inline.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/instanceOop.hpp"
43 #include "oops/markOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/typeArrayKlass.hpp"
50 #include "oops/typeArrayOop.hpp"
51 #include "prims/jni.h"
52 #include "prims/jniCheck.hpp"
53 #include "prims/jniExport.hpp"
54 #include "prims/jniFastGetField.hpp"
55 #include "prims/jvm.h"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/atomic.inline.hpp"
60 #include "runtime/compilationPolicy.hpp"
61 #include "runtime/fieldDescriptor.hpp"
62 #include "runtime/fprofiler.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/orderAccess.inline.hpp"
70 #include "runtime/reflection.hpp"
71 #include "runtime/sharedRuntime.hpp"
72 #include "runtime/signature.hpp"
73 #include "runtime/thread.inline.hpp"
74 #include "runtime/vm_operations.hpp"
75 #include "services/memTracker.hpp"
76 #include "services/runtimeService.hpp"
77 #include "trace/tracing.hpp"
78 #include "utilities/defaultStream.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/histogram.hpp"
82 #include "utilities/macros.hpp"
83 #if INCLUDE_ALL_GCS
84 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
85 #endif // INCLUDE_ALL_GCS
86
87 static jint CurrentVersion = JNI_VERSION_1_8;
88
89 #ifdef _WIN32
90 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
91 #endif
92
93 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
94 // '-return' probe regardless of the return path is taken out of the function.
95 // Methods that have multiple return paths use this to avoid having to
96 // instrument each return path. Methods that use CHECK or THROW must use this
97 // since those macros can cause an immedate uninstrumented return.
98 //
99 // In order to get the return value, a reference to the variable containing
100 // the return value must be passed to the contructor of the object, and
101 // the return value must be set before return (since the mark object has
102 // a reference to it).
103 //
104 // Example:
105 // DT_RETURN_MARK_DECL(SomeFunc, int);
106 // JNI_ENTRY(int, SomeFunc, ...)
107 // int return_value = 0;
108 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
109 // foo(CHECK_0)
110 // return_value = 5;
111 // return return_value;
112 // JNI_END
113 #define DT_RETURN_MARK_DECL(name, type, probe) \
114 DTRACE_ONLY( \
115 class DTraceReturnProbeMark_##name { \
116 public: \
117 const type& _ret_ref; \
118 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
119 ~DTraceReturnProbeMark_##name() { \
120 probe; \
121 } \
122 } \
123 )
124 // Void functions are simpler since there's no return value
125 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
126 DTRACE_ONLY( \
127 class DTraceReturnProbeMark_##name { \
128 public: \
129 ~DTraceReturnProbeMark_##name() { \
130 probe; \
131 } \
132 } \
133 )
134
135 // Place these macros in the function to mark the return. Non-void
136 // functions need the type and address of the return value.
137 #define DT_RETURN_MARK(name, type, ref) \
138 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
139 #define DT_VOID_RETURN_MARK(name) \
140 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
141
142
143 // Use these to select distinct code for floating-point vs. non-floating point
144 // situations. Used from within common macros where we need slightly
145 // different behavior for Float/Double
146 #define FP_SELECT_Boolean(intcode, fpcode) intcode
147 #define FP_SELECT_Byte(intcode, fpcode) intcode
148 #define FP_SELECT_Char(intcode, fpcode) intcode
149 #define FP_SELECT_Short(intcode, fpcode) intcode
150 #define FP_SELECT_Object(intcode, fpcode) intcode
151 #define FP_SELECT_Int(intcode, fpcode) intcode
152 #define FP_SELECT_Long(intcode, fpcode) intcode
153 #define FP_SELECT_Float(intcode, fpcode) fpcode
154 #define FP_SELECT_Double(intcode, fpcode) fpcode
155 #define FP_SELECT(TypeName, intcode, fpcode) \
156 FP_SELECT_##TypeName(intcode, fpcode)
157
158 #define COMMA ,
159
160 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
161 // (dtrace doesn't do FP yet)
162 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
163 FP_SELECT(TypeName, \
164 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
165 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
166 FP_SELECT(TypeName, \
167 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
168
169
170 // out-of-line helpers for class jfieldIDWorkaround:
171
172 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
173 if (jfieldIDWorkaround::is_instance_jfieldID(id)) {
174 uintptr_t as_uint = (uintptr_t) id;
175 intptr_t offset = raw_instance_offset(id);
176 if (is_checked_jfieldID(id)) {
177 if (!klass_hash_ok(k, id)) {
178 return false;
179 }
180 }
181 return InstanceKlass::cast(k)->contains_field_offset(offset);
182 } else {
183 JNIid* result = (JNIid*) id;
184 #ifdef ASSERT
185 return result != NULL && result->is_static_field_id();
186 #else
187 return result != NULL;
188 #endif
189 }
190 }
191
192
193 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
194 if (offset <= small_offset_mask) {
195 Klass* field_klass = k;
196 Klass* super_klass = field_klass->super();
197 // With compressed oops the most super class with nonstatic fields would
198 // be the owner of fields embedded in the header.
199 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
200 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
201 field_klass = super_klass; // super contains the field also
202 super_klass = field_klass->super();
203 }
204 debug_only(No_Safepoint_Verifier nosafepoint;)
205 uintptr_t klass_hash = field_klass->identity_hash();
206 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
207 } else {
208 #if 0
209 #ifndef PRODUCT
210 {
211 ResourceMark rm;
212 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
213 }
214 #endif
215 #endif
216 return 0;
217 }
218 }
219
220 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
221 uintptr_t as_uint = (uintptr_t) id;
222 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
223 do {
224 debug_only(No_Safepoint_Verifier nosafepoint;)
225 // Could use a non-blocking query for identity_hash here...
226 if ((k->identity_hash() & klass_mask) == klass_hash)
227 return true;
228 k = k->super();
229 } while (k != NULL);
230 return false;
231 }
232
233 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
234 guarantee(jfieldIDWorkaround::is_instance_jfieldID(id), "must be an instance field" );
235 uintptr_t as_uint = (uintptr_t) id;
236 intptr_t offset = raw_instance_offset(id);
237 if (VerifyJNIFields) {
238 if (is_checked_jfieldID(id)) {
239 guarantee(klass_hash_ok(k, id),
240 "Bug in native code: jfieldID class must match object");
241 } else {
242 #if 0
243 #ifndef PRODUCT
244 if (Verbose) {
245 ResourceMark rm;
246 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
247 }
248 #endif
249 #endif
250 }
251 }
252 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
253 "Bug in native code: jfieldID offset must address interior of object");
254 }
255
256 // Wrapper to trace JNI functions
257
258 #ifdef ASSERT
259 Histogram* JNIHistogram;
260 static volatile jint JNIHistogram_lock = 0;
261
262 class JNITraceWrapper : public StackObj {
263 public:
264 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
265 if (TraceJNICalls) {
266 va_list ap;
267 va_start(ap, format);
268 tty->print("JNI ");
269 tty->vprint_cr(format, ap);
270 va_end(ap);
271 }
272 }
273 };
274
275 class JNIHistogramElement : public HistogramElement {
276 public:
277 JNIHistogramElement(const char* name);
278 };
279
280 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
281 _name = elementName;
282 uintx count = 0;
283
284 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
285 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
286 count +=1;
287 if ( (WarnOnStalledSpinLock > 0)
288 && (count % WarnOnStalledSpinLock == 0)) {
289 warning("JNIHistogram_lock seems to be stalled");
290 }
291 }
292 }
293
294
295 if(JNIHistogram == NULL)
296 JNIHistogram = new Histogram("JNI Call Counts",100);
297
298 JNIHistogram->add_element(this);
299 Atomic::dec(&JNIHistogram_lock);
300 }
301
302 #define JNICountWrapper(arg) \
303 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
304 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
305 if (e != NULL) e->increment_count()
306 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
307 #else
308 #define JNIWrapper(arg)
309 #endif
310
311
312 // Implementation of JNI entries
313
314 DT_RETURN_MARK_DECL(DefineClass, jclass
315 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
316
317 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
318 const jbyte *buf, jsize bufLen))
319 JNIWrapper("DefineClass");
320
321 HOTSPOT_JNI_DEFINECLASS_ENTRY(
322 env, (char*) name, loaderRef, (char*) buf, bufLen);
323
324 jclass cls = NULL;
325 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
326
327 TempNewSymbol class_name = NULL;
328 // Since exceptions can be thrown, class initialization can take place
329 // if name is NULL no check for class name in .class stream has to be made.
330 if (name != NULL) {
331 const int str_len = (int)strlen(name);
332 if (str_len > Symbol::max_length()) {
333 // It's impossible to create this class; the name cannot fit
334 // into the constant pool.
335 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
336 }
337 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
338 }
339 ResourceMark rm(THREAD);
340 ClassFileStream st((u1*) buf, bufLen, NULL);
341 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
342
343 if (UsePerfData && !class_loader.is_null()) {
344 // check whether the current caller thread holds the lock or not.
345 // If not, increment the corresponding counter
346 if (ObjectSynchronizer::
347 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
348 ObjectSynchronizer::owner_self) {
349 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
350 }
351 }
352 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
353 Handle(), &st, true,
354 CHECK_NULL);
355
356 if (TraceClassResolution && k != NULL) {
357 trace_class_resolution(k);
358 }
359
360 cls = (jclass)JNIHandles::make_local(
361 env, k->java_mirror());
362 return cls;
363 JNI_END
364
365
366
367 static bool first_time_FindClass = true;
368
369 DT_RETURN_MARK_DECL(FindClass, jclass
370 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
371
372 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
373 JNIWrapper("FindClass");
374
375 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
376
377 jclass result = NULL;
378 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
379
380 // Remember if we are the first invocation of jni_FindClass
381 bool first_time = first_time_FindClass;
382 first_time_FindClass = false;
383
384 // Sanity check the name: it cannot be null or larger than the maximum size
385 // name we can fit in the constant pool.
386 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
387 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
388 }
389
390 //%note jni_3
391 Handle loader;
392 Handle protection_domain;
393 // Find calling class
394 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
395 if (k.not_null()) {
396 loader = Handle(THREAD, k->class_loader());
397 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
398 // in the correct class context.
399 if (loader.is_null() &&
400 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
401 JavaValue result(T_OBJECT);
402 JavaCalls::call_static(&result, k,
403 vmSymbols::getFromClass_name(),
404 vmSymbols::void_class_signature(),
405 thread);
406 if (HAS_PENDING_EXCEPTION) {
407 Handle ex(thread, thread->pending_exception());
408 CLEAR_PENDING_EXCEPTION;
409 THROW_HANDLE_0(ex);
410 }
411 oop mirror = (oop) result.get_jobject();
412 loader = Handle(THREAD,
413 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
414 protection_domain = Handle(THREAD,
415 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
416 }
417 } else {
418 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
419 loader = Handle(THREAD, SystemDictionary::java_system_loader());
420 }
421
422 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
423 result = find_class_from_class_loader(env, sym, true, loader,
424 protection_domain, true, thread);
425
426 if (TraceClassResolution && result != NULL) {
427 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
428 }
429
430 // If we were the first invocation of jni_FindClass, we enable compilation again
431 // rather than just allowing invocation counter to overflow and decay.
432 // Controlled by flag DelayCompilationDuringStartup.
433 if (first_time && !CompileTheWorld)
434 CompilationPolicy::completed_vm_startup();
435
436 return result;
437 JNI_END
438
439 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
440 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
441
442 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
443 JNIWrapper("FromReflectedMethod");
444
445 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
446
447 jmethodID ret = NULL;
448 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
449
450 // method is a handle to a java.lang.reflect.Method object
451 oop reflected = JNIHandles::resolve_non_null(method);
452 oop mirror = NULL;
453 int slot = 0;
454
455 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
456 mirror = java_lang_reflect_Constructor::clazz(reflected);
457 slot = java_lang_reflect_Constructor::slot(reflected);
458 } else {
459 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
460 mirror = java_lang_reflect_Method::clazz(reflected);
461 slot = java_lang_reflect_Method::slot(reflected);
462 }
463 Klass* k = java_lang_Class::as_Klass(mirror);
464
465 KlassHandle k1(THREAD, k);
466 // Make sure class is initialized before handing id's out to methods
467 k1()->initialize(CHECK_NULL);
468 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
469 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
470 return ret;
471 JNI_END
472
473 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
474 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
475
476 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
477 JNIWrapper("FromReflectedField");
478
479 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
480
481 jfieldID ret = NULL;
482 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
483
484 // field is a handle to a java.lang.reflect.Field object
485 oop reflected = JNIHandles::resolve_non_null(field);
486 oop mirror = java_lang_reflect_Field::clazz(reflected);
487 Klass* k = java_lang_Class::as_Klass(mirror);
488 int slot = java_lang_reflect_Field::slot(reflected);
489 int modifiers = java_lang_reflect_Field::modifiers(reflected);
490
491 KlassHandle k1(THREAD, k);
492 // Make sure class is initialized before handing id's out to fields
493 k1()->initialize(CHECK_NULL);
494
495 // First check if this is a static field
496 if (modifiers & JVM_ACC_STATIC) {
497 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
498 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
499 assert(id != NULL, "corrupt Field object");
500 debug_only(id->set_is_static_field_id();)
501 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
502 ret = jfieldIDWorkaround::to_static_jfieldID(id);
503 return ret;
504 }
505
506 // The slot is the index of the field description in the field-array
507 // The jfieldID is the offset of the field within the object
508 // It may also have hash bits for k, if VerifyJNIFields is turned on.
509 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
510 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
511 bool is_final = (modifiers & JVM_ACC_FINAL) != 0;
512 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset, is_final);
513 return ret;
514 JNI_END
515
516
517 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
518 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
519
520 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
521 JNIWrapper("ToReflectedMethod");
522
523 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
524
525 jobject ret = NULL;
526 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
527
528 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
529 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
530 oop reflection_method;
531 if (m->is_initializer()) {
532 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
533 } else {
534 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
535 }
536 ret = JNIHandles::make_local(env, reflection_method);
537 return ret;
538 JNI_END
539
540 DT_RETURN_MARK_DECL(GetSuperclass, jclass
541 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
542
543 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
544 JNIWrapper("GetSuperclass");
545
546 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
547
548 jclass obj = NULL;
549 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
550
551 oop mirror = JNIHandles::resolve_non_null(sub);
552 // primitive classes return NULL
553 if (java_lang_Class::is_primitive(mirror)) return NULL;
554
555 // Rules of Class.getSuperClass as implemented by KLass::java_super:
556 // arrays return Object
557 // interfaces return NULL
558 // proper classes return Klass::super()
559 Klass* k = java_lang_Class::as_Klass(mirror);
560 if (k->is_interface()) return NULL;
561
562 // return mirror for superclass
563 Klass* super = k->java_super();
564 // super2 is the value computed by the compiler's getSuperClass intrinsic:
565 debug_only(Klass* super2 = ( k->oop_is_array()
566 ? SystemDictionary::Object_klass()
567 : k->super() ) );
568 assert(super == super2,
569 "java_super computation depends on interface, array, other super");
570 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
571 return obj;
572 JNI_END
573
574 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
575 JNIWrapper("IsSubclassOf");
576
577 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
578
579 oop sub_mirror = JNIHandles::resolve_non_null(sub);
580 oop super_mirror = JNIHandles::resolve_non_null(super);
581 if (java_lang_Class::is_primitive(sub_mirror) ||
582 java_lang_Class::is_primitive(super_mirror)) {
583 jboolean ret = (sub_mirror == super_mirror);
584
585 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
586 return ret;
587 }
588 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
589 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
590 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
591 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
592 JNI_TRUE : JNI_FALSE;
593
594 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
595 return ret;
596 JNI_END
597
598
599 DT_RETURN_MARK_DECL(Throw, jint
600 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
601
602 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
603 JNIWrapper("Throw");
604
605 HOTSPOT_JNI_THROW_ENTRY(env, obj);
606
607 jint ret = JNI_OK;
608 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
609
610 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
611 ShouldNotReachHere();
612 return 0; // Mute compiler.
613 JNI_END
614
615
616 DT_RETURN_MARK_DECL(ThrowNew, jint
617 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
618
619 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
620 JNIWrapper("ThrowNew");
621
622 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
623
624 jint ret = JNI_OK;
625 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
626
627 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
628 Symbol* name = k->name();
629 Handle class_loader (THREAD, k->class_loader());
630 Handle protection_domain (THREAD, k->protection_domain());
631 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
632 ShouldNotReachHere();
633 return 0; // Mute compiler.
634 JNI_END
635
636
637 // JNI functions only transform a pending async exception to a synchronous
638 // exception in ExceptionOccurred and ExceptionCheck calls, since
639 // delivering an async exception in other places won't change the native
640 // code's control flow and would be harmful when native code further calls
641 // JNI functions with a pending exception. Async exception is also checked
642 // during the call, so ExceptionOccurred/ExceptionCheck won't return
643 // false but deliver the async exception at the very end during
644 // state transition.
645
646 static void jni_check_async_exceptions(JavaThread *thread) {
647 assert(thread == Thread::current(), "must be itself");
648 thread->check_and_handle_async_exceptions();
649 }
650
651 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
652 JNIWrapper("ExceptionOccurred");
653
654 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
655
656 jni_check_async_exceptions(thread);
657 oop exception = thread->pending_exception();
658 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
659
660 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
661 return ret;
662 JNI_END
663
664
665 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
666 JNIWrapper("ExceptionDescribe");
667
668 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
669
670 if (thread->has_pending_exception()) {
671 Handle ex(thread, thread->pending_exception());
672 thread->clear_pending_exception();
673 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
674 // Don't print anything if we are being killed.
675 } else {
676 jio_fprintf(defaultStream::error_stream(), "Exception ");
677 if (thread != NULL && thread->threadObj() != NULL) {
678 ResourceMark rm(THREAD);
679 jio_fprintf(defaultStream::error_stream(),
680 "in thread \"%s\" ", thread->get_thread_name());
681 }
682 if (ex->is_a(SystemDictionary::Throwable_klass())) {
683 JavaValue result(T_VOID);
684 JavaCalls::call_virtual(&result,
685 ex,
686 KlassHandle(THREAD,
687 SystemDictionary::Throwable_klass()),
688 vmSymbols::printStackTrace_name(),
689 vmSymbols::void_method_signature(),
690 THREAD);
691 // If an exception is thrown in the call it gets thrown away. Not much
692 // we can do with it. The native code that calls this, does not check
693 // for the exception - hence, it might still be in the thread when DestroyVM gets
694 // called, potentially causing a few asserts to trigger - since no pending exception
695 // is expected.
696 CLEAR_PENDING_EXCEPTION;
697 } else {
698 ResourceMark rm(THREAD);
699 jio_fprintf(defaultStream::error_stream(),
700 ". Uncaught exception of type %s.",
701 ex->klass()->external_name());
702 }
703 }
704 }
705
706 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
707 JNI_END
708
709
710 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
711 JNIWrapper("ExceptionClear");
712
713 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
714
715 // The jni code might be using this API to clear java thrown exception.
716 // So just mark jvmti thread exception state as exception caught.
717 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
718 if (state != NULL && state->is_exception_detected()) {
719 state->set_exception_caught();
720 }
721 thread->clear_pending_exception();
722
723 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
724 JNI_END
725
726
727 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
728 JNIWrapper("FatalError");
729
730 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
731
732 tty->print_cr("FATAL ERROR in native method: %s", msg);
733 thread->print_stack();
734 os::abort(); // Dump core and abort
735 JNI_END
736
737
738 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
739 JNIWrapper("PushLocalFrame");
740
741 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
742
743 //%note jni_11
744 if (capacity < 0 ||
745 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
747 return JNI_ERR;
748 }
749 JNIHandleBlock* old_handles = thread->active_handles();
750 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
751 assert(new_handles != NULL, "should not be NULL");
752 new_handles->set_pop_frame_link(old_handles);
753 thread->set_active_handles(new_handles);
754 jint ret = JNI_OK;
755 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
756 return ret;
757 JNI_END
758
759
760 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
761 JNIWrapper("PopLocalFrame");
762
763 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
764
765 //%note jni_11
766 Handle result_handle(thread, JNIHandles::resolve(result));
767 JNIHandleBlock* old_handles = thread->active_handles();
768 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
769 if (new_handles != NULL) {
770 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
771 // This way code will still work if PopLocalFrame is called without a corresponding
772 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
773 // the release_block call will release the blocks.
774 thread->set_active_handles(new_handles);
775 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
776 JNIHandleBlock::release_block(old_handles, thread); // may block
777 result = JNIHandles::make_local(thread, result_handle());
778 }
779 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
780 return result;
781 JNI_END
782
783
784 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
785 JNIWrapper("NewGlobalRef");
786
787 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
788
789 Handle ref_handle(thread, JNIHandles::resolve(ref));
790 jobject ret = JNIHandles::make_global(ref_handle);
791
792 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
793 return ret;
794 JNI_END
795
796 // Must be JNI_ENTRY (with HandleMark)
797 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
798 JNIWrapper("DeleteGlobalRef");
799
800 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
801
802 JNIHandles::destroy_global(ref);
803
804 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
805 JNI_END
806
807 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
808 JNIWrapper("DeleteLocalRef");
809
810 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
811
812 JNIHandles::destroy_local(obj);
813
814 HOTSPOT_JNI_DELETELOCALREF_RETURN();
815 JNI_END
816
817 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
818 JNIWrapper("IsSameObject");
819
820 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
821
822 oop a = JNIHandles::resolve(r1);
823 oop b = JNIHandles::resolve(r2);
824 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
825
826 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
827 return ret;
828 JNI_END
829
830
831 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
832 JNIWrapper("NewLocalRef");
833
834 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
835
836 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
837
838 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
839 return ret;
840 JNI_END
841
842 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
843 JNIWrapper("EnsureLocalCapacity");
844
845 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
846
847 jint ret;
848 if (capacity >= 0 &&
849 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
850 ret = JNI_OK;
851 } else {
852 ret = JNI_ERR;
853 }
854
855 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
856 return ret;
857 JNI_END
858
859 // Return the Handle Type
860 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
861 JNIWrapper("GetObjectRefType");
862
863 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
864
865 jobjectRefType ret;
866 if (JNIHandles::is_local_handle(thread, obj) ||
867 JNIHandles::is_frame_handle(thread, obj))
868 ret = JNILocalRefType;
869 else if (JNIHandles::is_global_handle(obj))
870 ret = JNIGlobalRefType;
871 else if (JNIHandles::is_weak_global_handle(obj))
872 ret = JNIWeakGlobalRefType;
873 else
874 ret = JNIInvalidRefType;
875
876 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
877 return ret;
878 JNI_END
879
880
881 class JNI_ArgumentPusher : public SignatureIterator {
882 protected:
883 JavaCallArguments* _arguments;
884
885 virtual void get_bool () = 0;
886 virtual void get_char () = 0;
887 virtual void get_short () = 0;
888 virtual void get_byte () = 0;
889 virtual void get_int () = 0;
890 virtual void get_long () = 0;
891 virtual void get_float () = 0;
892 virtual void get_double () = 0;
893 virtual void get_object () = 0;
894
895 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
896 this->_return_type = T_ILLEGAL;
897 _arguments = NULL;
898 }
899
900 public:
901 virtual void iterate( uint64_t fingerprint ) = 0;
902
903 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
904
905 inline void do_bool() { if (!is_return_type()) get_bool(); }
906 inline void do_char() { if (!is_return_type()) get_char(); }
907 inline void do_short() { if (!is_return_type()) get_short(); }
908 inline void do_byte() { if (!is_return_type()) get_byte(); }
909 inline void do_int() { if (!is_return_type()) get_int(); }
910 inline void do_long() { if (!is_return_type()) get_long(); }
911 inline void do_float() { if (!is_return_type()) get_float(); }
912 inline void do_double() { if (!is_return_type()) get_double(); }
913 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
914 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
915 inline void do_void() { }
916
917 JavaCallArguments* arguments() { return _arguments; }
918 void push_receiver(Handle h) { _arguments->push_oop(h); }
919 };
920
921
922 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
923 protected:
924 va_list _ap;
925
926 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
927 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
928 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
929 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
930 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
931
932 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
933
934 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
935 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
936 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
937 inline void get_object() { jobject l = va_arg(_ap, jobject);
938 _arguments->push_oop(Handle((oop *)l, false)); }
939
940 inline void set_ap(va_list rap) {
941 #ifdef va_copy
942 va_copy(_ap, rap);
943 #elif defined (__va_copy)
944 __va_copy(_ap, rap);
945 #else
946 _ap = rap;
947 #endif
948 }
949
950 public:
951 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
952 : JNI_ArgumentPusher(signature) {
953 set_ap(rap);
954 }
955 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
956 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
957 set_ap(rap);
958 }
959
960 // Optimized path if we have the bitvector form of signature
961 void iterate( uint64_t fingerprint ) {
962 if (fingerprint == (uint64_t)CONST64(-1)) {
963 SignatureIterator::iterate(); // Must be too many arguments
964 } else {
965 _return_type = (BasicType)((fingerprint >> static_feature_size) &
966 result_feature_mask);
967
968 assert(fingerprint, "Fingerprint should not be 0");
969 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
970 while ( 1 ) {
971 switch ( fingerprint & parameter_feature_mask ) {
972 case bool_parm:
973 case char_parm:
974 case short_parm:
975 case byte_parm:
976 case int_parm:
977 get_int();
978 break;
979 case obj_parm:
980 get_object();
981 break;
982 case long_parm:
983 get_long();
984 break;
985 case float_parm:
986 get_float();
987 break;
988 case double_parm:
989 get_double();
990 break;
991 case done_parm:
992 return;
993 break;
994 default:
995 ShouldNotReachHere();
996 break;
997 }
998 fingerprint >>= parameter_feature_size;
999 }
1000 }
1001 }
1002 };
1003
1004
1005 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1006 protected:
1007 const jvalue *_ap;
1008
1009 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1010 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1011 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1012 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1013 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1014
1015 inline void get_long() { _arguments->push_long((_ap++)->j); }
1016 inline void get_float() { _arguments->push_float((_ap++)->f); }
1017 inline void get_double() { _arguments->push_double((_ap++)->d);}
1018 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1019
1020 inline void set_ap(const jvalue *rap) { _ap = rap; }
1021
1022 public:
1023 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1024 : JNI_ArgumentPusher(signature) {
1025 set_ap(rap);
1026 }
1027 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1028 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1029 set_ap(rap);
1030 }
1031
1032 // Optimized path if we have the bitvector form of signature
1033 void iterate( uint64_t fingerprint ) {
1034 if (fingerprint == (uint64_t)CONST64(-1)) {
1035 SignatureIterator::iterate(); // Must be too many arguments
1036 } else {
1037 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1038 result_feature_mask);
1039 assert(fingerprint, "Fingerprint should not be 0");
1040 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1041 while ( 1 ) {
1042 switch ( fingerprint & parameter_feature_mask ) {
1043 case bool_parm:
1044 get_bool();
1045 break;
1046 case char_parm:
1047 get_char();
1048 break;
1049 case short_parm:
1050 get_short();
1051 break;
1052 case byte_parm:
1053 get_byte();
1054 break;
1055 case int_parm:
1056 get_int();
1057 break;
1058 case obj_parm:
1059 get_object();
1060 break;
1061 case long_parm:
1062 get_long();
1063 break;
1064 case float_parm:
1065 get_float();
1066 break;
1067 case double_parm:
1068 get_double();
1069 break;
1070 case done_parm:
1071 return;
1072 break;
1073 default:
1074 ShouldNotReachHere();
1075 break;
1076 }
1077 fingerprint >>= parameter_feature_size;
1078 }
1079 }
1080 }
1081 };
1082
1083
1084 enum JNICallType {
1085 JNI_STATIC,
1086 JNI_VIRTUAL,
1087 JNI_NONVIRTUAL
1088 };
1089
1090
1091
1092 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1093 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1094
1095 // Create object to hold arguments for the JavaCall, and associate it with
1096 // the jni parser
1097 ResourceMark rm(THREAD);
1098 int number_of_parameters = method->size_of_parameters();
1099 JavaCallArguments java_args(number_of_parameters);
1100 args->set_java_argument_object(&java_args);
1101
1102 assert(method->is_static(), "method should be static");
1103
1104 // Fill out JavaCallArguments object
1105 args->iterate( Fingerprinter(method).fingerprint() );
1106 // Initialize result type
1107 result->set_type(args->get_ret_type());
1108
1109 // Invoke the method. Result is returned as oop.
1110 JavaCalls::call(result, method, &java_args, CHECK);
1111
1112 // Convert result
1113 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1114 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1115 }
1116 }
1117
1118
1119 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1120 oop recv = JNIHandles::resolve(receiver);
1121 if (recv == NULL) {
1122 THROW(vmSymbols::java_lang_NullPointerException());
1123 }
1124 Handle h_recv(THREAD, recv);
1125
1126 int number_of_parameters;
1127 Method* selected_method;
1128 {
1129 Method* m = Method::resolve_jmethod_id(method_id);
1130 number_of_parameters = m->size_of_parameters();
1131 Klass* holder = m->method_holder();
1132 if (call_type != JNI_VIRTUAL) {
1133 selected_method = m;
1134 } else if (!m->has_itable_index()) {
1135 // non-interface call -- for that little speed boost, don't handlize
1136 debug_only(No_Safepoint_Verifier nosafepoint;)
1137 // jni_GetMethodID makes sure class is linked and initialized
1138 // so m should have a valid vtable index.
1139 assert(m->valid_vtable_index(), "no valid vtable index");
1140 int vtbl_index = m->vtable_index();
1141 if (vtbl_index != Method::nonvirtual_vtable_index) {
1142 Klass* k = h_recv->klass();
1143 // k might be an arrayKlassOop but all vtables start at
1144 // the same place. The cast is to avoid virtual call and assertion.
1145 InstanceKlass *ik = (InstanceKlass*)k;
1146 selected_method = ik->method_at_vtable(vtbl_index);
1147 } else {
1148 // final method
1149 selected_method = m;
1150 }
1151 } else {
1152 // interface call
1153 KlassHandle h_holder(THREAD, holder);
1154
1155 int itbl_index = m->itable_index();
1156 Klass* k = h_recv->klass();
1157 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1158 }
1159 }
1160
1161 methodHandle method(THREAD, selected_method);
1162
1163 // Create object to hold arguments for the JavaCall, and associate it with
1164 // the jni parser
1165 ResourceMark rm(THREAD);
1166 JavaCallArguments java_args(number_of_parameters);
1167 args->set_java_argument_object(&java_args);
1168
1169 // handle arguments
1170 assert(!method->is_static(), "method should not be static");
1171 args->push_receiver(h_recv); // Push jobject handle
1172
1173 // Fill out JavaCallArguments object
1174 args->iterate( Fingerprinter(method).fingerprint() );
1175 // Initialize result type
1176 result->set_type(args->get_ret_type());
1177
1178 // Invoke the method. Result is returned as oop.
1179 JavaCalls::call(result, method, &java_args, CHECK);
1180
1181 // Convert result
1182 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1183 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1184 }
1185 }
1186
1187
1188 static instanceOop alloc_object(jclass clazz, TRAPS) {
1189 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1190 if (k == NULL) {
1191 ResourceMark rm(THREAD);
1192 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1193 }
1194 k()->check_valid_for_instantiation(false, CHECK_NULL);
1195 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1196 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1197 return ih;
1198 }
1199
1200 DT_RETURN_MARK_DECL(AllocObject, jobject
1201 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1202
1203 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1204 JNIWrapper("AllocObject");
1205
1206 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1207
1208 jobject ret = NULL;
1209 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1210
1211 instanceOop i = alloc_object(clazz, CHECK_NULL);
1212 ret = JNIHandles::make_local(env, i);
1213 return ret;
1214 JNI_END
1215
1216 DT_RETURN_MARK_DECL(NewObjectA, jobject
1217 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1218
1219 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1220 JNIWrapper("NewObjectA");
1221
1222 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1223
1224 jobject obj = NULL;
1225 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1226
1227 instanceOop i = alloc_object(clazz, CHECK_NULL);
1228 obj = JNIHandles::make_local(env, i);
1229 JavaValue jvalue(T_VOID);
1230 JNI_ArgumentPusherArray ap(methodID, args);
1231 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1232 return obj;
1233 JNI_END
1234
1235
1236 DT_RETURN_MARK_DECL(NewObjectV, jobject
1237 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1238
1239 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1240 JNIWrapper("NewObjectV");
1241
1242 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1243
1244 jobject obj = NULL;
1245 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1246
1247 instanceOop i = alloc_object(clazz, CHECK_NULL);
1248 obj = JNIHandles::make_local(env, i);
1249 JavaValue jvalue(T_VOID);
1250 JNI_ArgumentPusherVaArg ap(methodID, args);
1251 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1252 return obj;
1253 JNI_END
1254
1255
1256 DT_RETURN_MARK_DECL(NewObject, jobject
1257 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1258
1259 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1260 JNIWrapper("NewObject");
1261
1262 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1263
1264 jobject obj = NULL;
1265 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1266
1267 instanceOop i = alloc_object(clazz, CHECK_NULL);
1268 obj = JNIHandles::make_local(env, i);
1269 va_list args;
1270 va_start(args, methodID);
1271 JavaValue jvalue(T_VOID);
1272 JNI_ArgumentPusherVaArg ap(methodID, args);
1273 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1274 va_end(args);
1275 return obj;
1276 JNI_END
1277
1278
1279 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1280 JNIWrapper("GetObjectClass");
1281
1282 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1283
1284 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1285 jclass ret =
1286 (jclass) JNIHandles::make_local(env, k->java_mirror());
1287
1288 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1289 return ret;
1290 JNI_END
1291
1292 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1293 JNIWrapper("IsInstanceOf");
1294
1295 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1296
1297 jboolean ret = JNI_TRUE;
1298 if (obj != NULL) {
1299 ret = JNI_FALSE;
1300 Klass* k = java_lang_Class::as_Klass(
1301 JNIHandles::resolve_non_null(clazz));
1302 if (k != NULL) {
1303 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1304 }
1305 }
1306
1307 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1308 return ret;
1309 JNI_END
1310
1311
1312 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1313 const char *sig, bool is_static, TRAPS) {
1314 // %%%% This code should probably just call into a method in the LinkResolver
1315 //
1316 // The class should have been loaded (we have an instance of the class
1317 // passed in) so the method and signature should already be in the symbol
1318 // table. If they're not there, the method doesn't exist.
1319 const char *name_to_probe = (name_str == NULL)
1320 ? vmSymbols::object_initializer_name()->as_C_string()
1321 : name_str;
1322 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1323 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1324
1325 if (name == NULL || signature == NULL) {
1326 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1327 }
1328
1329 // Throw a NoSuchMethodError exception if we have an instance of a
1330 // primitive java.lang.Class
1331 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1333 }
1334
1335 KlassHandle klass(THREAD,
1336 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1337
1338 // Make sure class is linked and initialized before handing id's out to
1339 // Method*s.
1340 klass()->initialize(CHECK_NULL);
1341
1342 Method* m;
1343 if (name == vmSymbols::object_initializer_name() ||
1344 name == vmSymbols::class_initializer_name()) {
1345 // Never search superclasses for constructors
1346 if (klass->oop_is_instance()) {
1347 m = InstanceKlass::cast(klass())->find_method(name, signature);
1348 } else {
1349 m = NULL;
1350 }
1351 } else {
1352 m = klass->lookup_method(name, signature);
1353 if (m == NULL && klass->oop_is_instance()) {
1354 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1355 }
1356 }
1357 if (m == NULL || (m->is_static() != is_static)) {
1358 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1359 }
1360 return m->jmethod_id();
1361 }
1362
1363
1364 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1365 const char *name, const char *sig))
1366 JNIWrapper("GetMethodID");
1367 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1368 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1369 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1370 return ret;
1371 JNI_END
1372
1373
1374 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1375 const char *name, const char *sig))
1376 JNIWrapper("GetStaticMethodID");
1377 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1378 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1379 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1380 return ret;
1381 JNI_END
1382
1383
1384
1385 //
1386 // Calling Methods
1387 //
1388
1389
1390 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1391 , EntryProbe, ReturnProbe) \
1392 \
1393 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1394 , ReturnProbe); \
1395 \
1396 JNI_ENTRY(ResultType, \
1397 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1398 JNIWrapper("Call" XSTR(Result) "Method"); \
1399 \
1400 EntryProbe; \
1401 ResultType ret = 0;\
1402 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1403 (const ResultType&)ret);\
1404 \
1405 va_list args; \
1406 va_start(args, methodID); \
1407 JavaValue jvalue(Tag); \
1408 JNI_ArgumentPusherVaArg ap(methodID, args); \
1409 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1410 va_end(args); \
1411 ret = jvalue.get_##ResultType(); \
1412 return ret;\
1413 JNI_END
1414
1415 // the runtime type of subword integral basic types is integer
1416 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1417 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1418 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1419 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1420 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1423 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1426 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1428
1429 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1430 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLMETHOD(jint, Int, T_INT,
1433 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1436 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1438 // Float and double probes don't return value because dtrace doesn't currently support it
1439 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1440 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1442 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1443 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1445
1446 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1447 , EntryProbe, ReturnProbe) \
1448 \
1449 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1450 , ReturnProbe); \
1451 \
1452 JNI_ENTRY(ResultType, \
1453 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1454 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1455 \
1456 EntryProbe;\
1457 ResultType ret = 0;\
1458 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1459 (const ResultType&)ret);\
1460 \
1461 JavaValue jvalue(Tag); \
1462 JNI_ArgumentPusherVaArg ap(methodID, args); \
1463 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1464 ret = jvalue.get_##ResultType(); \
1465 return ret;\
1466 JNI_END
1467
1468 // the runtime type of subword integral basic types is integer
1469 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1470 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1471 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1472 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1473 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1476 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1479 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1481
1482 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1483 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLMETHODV(jint, Int, T_INT,
1486 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1489 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1491 // Float and double probes don't return value because dtrace doesn't currently support it
1492 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1493 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1495 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1496 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1498
1499 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1500 , EntryProbe, ReturnProbe) \
1501 \
1502 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1503 , ReturnProbe); \
1504 \
1505 JNI_ENTRY(ResultType, \
1506 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1507 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1508 EntryProbe; \
1509 ResultType ret = 0;\
1510 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1511 (const ResultType&)ret);\
1512 \
1513 JavaValue jvalue(Tag); \
1514 JNI_ArgumentPusherArray ap(methodID, args); \
1515 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1516 ret = jvalue.get_##ResultType(); \
1517 return ret;\
1518 JNI_END
1519
1520 // the runtime type of subword integral basic types is integer
1521 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1522 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1523 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1524 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1525 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1528 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1531 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1533
1534 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1535 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODA(jint, Int, T_INT,
1538 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1541 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1543 // Float and double probes don't return value because dtrace doesn't currently support it
1544 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1545 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1547 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1548 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1550
1551 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1552 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1553 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1554
1555
1556 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1557 JNIWrapper("CallVoidMethod");
1558 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1559 DT_VOID_RETURN_MARK(CallVoidMethod);
1560
1561 va_list args;
1562 va_start(args, methodID);
1563 JavaValue jvalue(T_VOID);
1564 JNI_ArgumentPusherVaArg ap(methodID, args);
1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1566 va_end(args);
1567 JNI_END
1568
1569
1570 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1571 JNIWrapper("CallVoidMethodV");
1572 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1573 DT_VOID_RETURN_MARK(CallVoidMethodV);
1574
1575 JavaValue jvalue(T_VOID);
1576 JNI_ArgumentPusherVaArg ap(methodID, args);
1577 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1578 JNI_END
1579
1580
1581 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1582 JNIWrapper("CallVoidMethodA");
1583 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1584 DT_VOID_RETURN_MARK(CallVoidMethodA);
1585
1586 JavaValue jvalue(T_VOID);
1587 JNI_ArgumentPusherArray ap(methodID, args);
1588 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1589 JNI_END
1590
1591
1592
1593 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1594 , EntryProbe, ReturnProbe) \
1595 \
1596 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1597 , ReturnProbe);\
1598 \
1599 JNI_ENTRY(ResultType, \
1600 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1601 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1602 \
1603 EntryProbe;\
1604 ResultType ret;\
1605 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1606 (const ResultType&)ret);\
1607 \
1608 va_list args; \
1609 va_start(args, methodID); \
1610 JavaValue jvalue(Tag); \
1611 JNI_ArgumentPusherVaArg ap(methodID, args); \
1612 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1613 va_end(args); \
1614 ret = jvalue.get_##ResultType(); \
1615 return ret;\
1616 JNI_END
1617
1618 // the runtime type of subword integral basic types is integer
1619 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1620 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1621 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1622 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1623 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1626 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1629 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1631
1632 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1633 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1635 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1636 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1639 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 // Float and double probes don't return value because dtrace doesn't currently support it
1641 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1643 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1645 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1646 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1648
1649 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1650 , EntryProbe, ReturnProbe) \
1651 \
1652 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1653 , ReturnProbe);\
1654 \
1655 JNI_ENTRY(ResultType, \
1656 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1657 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1658 \
1659 EntryProbe;\
1660 ResultType ret;\
1661 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1662 (const ResultType&)ret);\
1663 \
1664 JavaValue jvalue(Tag); \
1665 JNI_ArgumentPusherVaArg ap(methodID, args); \
1666 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1667 ret = jvalue.get_##ResultType(); \
1668 return ret;\
1669 JNI_END
1670
1671 // the runtime type of subword integral basic types is integer
1672 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1673 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1674 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1675 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1676 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1678 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1679 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1682 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1684
1685 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1686 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1688 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1689 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1692 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 // Float and double probes don't return value because dtrace doesn't currently support it
1694 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1696 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1698 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1699 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1701
1702 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1703 , EntryProbe, ReturnProbe) \
1704 \
1705 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1706 , ReturnProbe);\
1707 \
1708 JNI_ENTRY(ResultType, \
1709 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1710 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1711 \
1712 EntryProbe;\
1713 ResultType ret;\
1714 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1715 (const ResultType&)ret);\
1716 \
1717 JavaValue jvalue(Tag); \
1718 JNI_ArgumentPusherArray ap(methodID, args); \
1719 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1720 ret = jvalue.get_##ResultType(); \
1721 return ret;\
1722 JNI_END
1723
1724 // the runtime type of subword integral basic types is integer
1725 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1726 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1727 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1728 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1729 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1731 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1732 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1735 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1737
1738 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1739 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1741 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1742 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1745 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 // Float and double probes don't return value because dtrace doesn't currently support it
1747 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1749 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1751 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1752 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1754
1755 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1756 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1757 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1758 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1761
1762 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1763 JNIWrapper("CallNonvirtualVoidMethod");
1764
1765 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1766 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1767
1768 va_list args;
1769 va_start(args, methodID);
1770 JavaValue jvalue(T_VOID);
1771 JNI_ArgumentPusherVaArg ap(methodID, args);
1772 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1773 va_end(args);
1774 JNI_END
1775
1776
1777 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1778 JNIWrapper("CallNonvirtualVoidMethodV");
1779
1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1781 env, obj, cls, (uintptr_t) methodID);
1782 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1783
1784 JavaValue jvalue(T_VOID);
1785 JNI_ArgumentPusherVaArg ap(methodID, args);
1786 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1787 JNI_END
1788
1789
1790 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1791 JNIWrapper("CallNonvirtualVoidMethodA");
1792 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1793 env, obj, cls, (uintptr_t) methodID);
1794 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1795 JavaValue jvalue(T_VOID);
1796 JNI_ArgumentPusherArray ap(methodID, args);
1797 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1798 JNI_END
1799
1800
1801
1802 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1803 , EntryProbe, ResultProbe) \
1804 \
1805 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1806 , ResultProbe); \
1807 \
1808 JNI_ENTRY(ResultType, \
1809 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1810 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1811 \
1812 EntryProbe; \
1813 ResultType ret = 0;\
1814 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1815 (const ResultType&)ret);\
1816 \
1817 va_list args; \
1818 va_start(args, methodID); \
1819 JavaValue jvalue(Tag); \
1820 JNI_ArgumentPusherVaArg ap(methodID, args); \
1821 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1822 va_end(args); \
1823 ret = jvalue.get_##ResultType(); \
1824 return ret;\
1825 JNI_END
1826
1827 // the runtime type of subword integral basic types is integer
1828 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1829 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1830 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1831 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1832 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1835 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1838 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1840
1841 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1842 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1844 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1845 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1848 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1850 // Float and double probes don't return value because dtrace doesn't currently support it
1851 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1852 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1854 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1855 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1857
1858 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1859 , EntryProbe, ResultProbe) \
1860 \
1861 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1862 , ResultProbe); \
1863 \
1864 JNI_ENTRY(ResultType, \
1865 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1866 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1867 \
1868 EntryProbe; \
1869 ResultType ret = 0;\
1870 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1871 (const ResultType&)ret);\
1872 \
1873 JavaValue jvalue(Tag); \
1874 JNI_ArgumentPusherVaArg ap(methodID, args); \
1875 /* Make sure class is initialized before trying to invoke its method */ \
1876 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1877 k()->initialize(CHECK_0); \
1878 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1879 va_end(args); \
1880 ret = jvalue.get_##ResultType(); \
1881 return ret;\
1882 JNI_END
1883
1884 // the runtime type of subword integral basic types is integer
1885 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1886 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1887 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1888 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1889 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1891 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1892 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1895 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1897
1898 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1899 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1901 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1902 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1905 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1907 // Float and double probes don't return value because dtrace doesn't currently support it
1908 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1909 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1911 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1912 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1914
1915 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1916 , EntryProbe, ResultProbe) \
1917 \
1918 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1919 , ResultProbe); \
1920 \
1921 JNI_ENTRY(ResultType, \
1922 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1923 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1924 \
1925 EntryProbe; \
1926 ResultType ret = 0;\
1927 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1928 (const ResultType&)ret);\
1929 \
1930 JavaValue jvalue(Tag); \
1931 JNI_ArgumentPusherArray ap(methodID, args); \
1932 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1933 ret = jvalue.get_##ResultType(); \
1934 return ret;\
1935 JNI_END
1936
1937 // the runtime type of subword integral basic types is integer
1938 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1939 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1940 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1941 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1942 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1944 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1945 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1948 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1950
1951 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1952 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1954 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1955 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1958 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1960 // Float and double probes don't return value because dtrace doesn't currently support it
1961 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1962 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1964 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1965 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1967
1968 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1969 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1970 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1971 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1974
1975 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1976 JNIWrapper("CallStaticVoidMethod");
1977 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1978 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1979
1980 va_list args;
1981 va_start(args, methodID);
1982 JavaValue jvalue(T_VOID);
1983 JNI_ArgumentPusherVaArg ap(methodID, args);
1984 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1985 va_end(args);
1986 JNI_END
1987
1988
1989 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1990 JNIWrapper("CallStaticVoidMethodV");
1991 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1992 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1993
1994 JavaValue jvalue(T_VOID);
1995 JNI_ArgumentPusherVaArg ap(methodID, args);
1996 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1997 JNI_END
1998
1999
2000 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2001 JNIWrapper("CallStaticVoidMethodA");
2002 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2003 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2004
2005 JavaValue jvalue(T_VOID);
2006 JNI_ArgumentPusherArray ap(methodID, args);
2007 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2008 JNI_END
2009
2010
2011 //
2012 // Accessing Fields
2013 //
2014
2015
2016 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2017 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2018
2019 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2020 const char *name, const char *sig))
2021 JNIWrapper("GetFieldID");
2022 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2023 jfieldID ret = 0;
2024 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2025
2026 // The class should have been loaded (we have an instance of the class
2027 // passed in) so the field and signature should already be in the symbol
2028 // table. If they're not there, the field doesn't exist.
2029 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2030 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2031 if (fieldname == NULL || signame == NULL) {
2032 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2033 }
2034 KlassHandle k(THREAD,
2035 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2036 // Make sure class is initialized before handing id's out to fields
2037 k()->initialize(CHECK_NULL);
2038
2039 fieldDescriptor fd;
2040 if (!k()->oop_is_instance() ||
2041 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2042 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2043 }
2044
2045 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2046 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2047 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset(), fd.access_flags().is_final());
2048 return ret;
2049 JNI_END
2050
2051
2052 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2053 JNIWrapper("GetObjectField");
2054 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2055 oop o = JNIHandles::resolve_non_null(obj);
2056 Klass* k = o->klass();
2057 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2058 // Keep JVMTI addition small and only check enabled flag here.
2059 // jni_GetField_probe() assumes that is okay to create handles.
2060 if (JvmtiExport::should_post_field_access()) {
2061 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2062 }
2063 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2064 #if INCLUDE_ALL_GCS
2065 // If G1 is enabled and we are accessing the value of the referent
2066 // field in a reference object then we need to register a non-null
2067 // referent with the SATB barrier.
2068 if (UseG1GC) {
2069 bool needs_barrier = false;
2070
2071 if (ret != NULL &&
2072 offset == java_lang_ref_Reference::referent_offset &&
2073 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2074 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2075 needs_barrier = true;
2076 }
2077
2078 if (needs_barrier) {
2079 oop referent = JNIHandles::resolve(ret);
2080 G1SATBCardTableModRefBS::enqueue(referent);
2081 }
2082 }
2083 #endif // INCLUDE_ALL_GCS
2084 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2085 return ret;
2086 JNI_END
2087
2088
2089
2090 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2091 , EntryProbe, ReturnProbe) \
2092 \
2093 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2094 , ReturnProbe); \
2095 \
2096 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2097 JNIWrapper("Get" XSTR(Result) "Field"); \
2098 \
2099 EntryProbe; \
2100 Return ret = 0;\
2101 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2102 \
2103 oop o = JNIHandles::resolve_non_null(obj); \
2104 Klass* k = o->klass(); \
2105 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2106 /* Keep JVMTI addition small and only check enabled flag here. */ \
2107 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2108 /* and creates a ResetNoHandleMark. */ \
2109 if (JvmtiExport::should_post_field_access()) { \
2110 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2111 } \
2112 ret = o->Fieldname##_field(offset); \
2113 return ret; \
2114 JNI_END
2115
2116 DEFINE_GETFIELD(jboolean, bool, Boolean
2117 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2118 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2119 DEFINE_GETFIELD(jbyte, byte, Byte
2120 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2122 DEFINE_GETFIELD(jchar, char, Char
2123 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2125 DEFINE_GETFIELD(jshort, short, Short
2126 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2128 DEFINE_GETFIELD(jint, int, Int
2129 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jlong, long, Long
2132 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2134 // Float and double probes don't return value because dtrace doesn't currently support it
2135 DEFINE_GETFIELD(jfloat, float, Float
2136 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2137 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2138 DEFINE_GETFIELD(jdouble, double, Double
2139 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2140 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2141
2142 address jni_GetBooleanField_addr() {
2143 return (address)jni_GetBooleanField;
2144 }
2145 address jni_GetByteField_addr() {
2146 return (address)jni_GetByteField;
2147 }
2148 address jni_GetCharField_addr() {
2149 return (address)jni_GetCharField;
2150 }
2151 address jni_GetShortField_addr() {
2152 return (address)jni_GetShortField;
2153 }
2154 address jni_GetIntField_addr() {
2155 return (address)jni_GetIntField;
2156 }
2157 address jni_GetLongField_addr() {
2158 return (address)jni_GetLongField;
2159 }
2160 address jni_GetFloatField_addr() {
2161 return (address)jni_GetFloatField;
2162 }
2163 address jni_GetDoubleField_addr() {
2164 return (address)jni_GetDoubleField;
2165 }
2166
2167 static void check_final_field(jobject obj, jfieldID fieldID, TRAPS) {
2168 if (TrustFinalNonStaticFields &&
2169 jfieldIDWorkaround::is_final_jfieldID(fieldID) &&
2170 jfieldIDWorkaround::is_instance_jfieldID(fieldID)) {
2171 ResetNoHandleMark rm;
2172 HandleMark hm;
2173 Handle recv(THREAD, JNIHandles::resolve(obj));
2174 if (!recv.is_null()) {
2175 instanceKlassHandle ctxk(THREAD, InstanceKlass::cast(recv->klass()));
2176 int offset = (int)jfieldIDWorkaround::from_instance_jfieldID(ctxk(), fieldID);
2177 ConstantFieldDepChange changes(recv, offset);
2178 Dependencies::invalidate_dependent_nmethods(ctxk, changes, THREAD);
2179 }
2180 }
2181 }
2182
2183 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2184 JNIWrapper("SetObjectField");
2185 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2186 check_final_field(obj, fieldID, thread);
2187 oop o = JNIHandles::resolve_non_null(obj);
2188 Klass* k = o->klass();
2189 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2190 // Keep JVMTI addition small and only check enabled flag here.
2191 // jni_SetField_probe_nh() assumes that is not okay to create handles
2192 // and creates a ResetNoHandleMark.
2193 if (JvmtiExport::should_post_field_modification()) {
2194 jvalue field_value;
2195 field_value.l = value;
2196 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2197 }
2198 o->obj_field_put(offset, JNIHandles::resolve(value));
2199 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2200 JNI_END
2201
2202
2203 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2204 , EntryProbe, ReturnProbe) \
2205 \
2206 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2207 JNIWrapper("Set" XSTR(Result) "Field"); \
2208 \
2209 EntryProbe; \
2210 \
2211 check_final_field(obj, fieldID, thread); \
2212 oop o = JNIHandles::resolve_non_null(obj); \
2213 Klass* k = o->klass(); \
2214 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2215 /* Keep JVMTI addition small and only check enabled flag here. */ \
2216 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2217 /* and creates a ResetNoHandleMark. */ \
2218 if (JvmtiExport::should_post_field_modification()) { \
2219 jvalue field_value; \
2220 field_value.unionType = value; \
2221 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2222 } \
2223 o->Fieldname##_field_put(offset, value); \
2224 ReturnProbe; \
2225 JNI_END
2226
2227 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2228 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2230 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2231 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2232 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2233 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2234 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2235 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2236 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2237 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2238 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2239 DEFINE_SETFIELD(jint, int, Int, 'I', i
2240 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2241 HOTSPOT_JNI_SETINTFIELD_RETURN())
2242 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2243 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2244 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2245 // Float and double probes don't return value because dtrace doesn't currently support it
2246 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2247 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2248 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2249 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2250 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2251 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2252
2253 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2254 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2255
2256 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2257 JNIWrapper("ToReflectedField");
2258 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2259 jobject ret = NULL;
2260 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2261
2262 fieldDescriptor fd;
2263 bool found = false;
2264 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2265
2266 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2267
2268 if (isStatic) {
2269 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2270 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2271 assert(id->is_static_field_id(), "invalid static field id");
2272 found = id->find_local_field(&fd);
2273 } else {
2274 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2275 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2276 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2277 }
2278 assert(found, "bad fieldID passed into jni_ToReflectedField");
2279 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2280 ret = JNIHandles::make_local(env, reflected);
2281 return ret;
2282 JNI_END
2283
2284
2285 //
2286 // Accessing Static Fields
2287 //
2288 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2289 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2290
2291 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2292 const char *name, const char *sig))
2293 JNIWrapper("GetStaticFieldID");
2294 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2295 jfieldID ret = NULL;
2296 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2297
2298 // The class should have been loaded (we have an instance of the class
2299 // passed in) so the field and signature should already be in the symbol
2300 // table. If they're not there, the field doesn't exist.
2301 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2302 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2303 if (fieldname == NULL || signame == NULL) {
2304 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2305 }
2306 KlassHandle k(THREAD,
2307 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2308 // Make sure class is initialized before handing id's out to static fields
2309 k()->initialize(CHECK_NULL);
2310
2311 fieldDescriptor fd;
2312 if (!k()->oop_is_instance() ||
2313 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2314 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2315 }
2316
2317 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2318 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2319 debug_only(id->set_is_static_field_id();)
2320
2321 debug_only(id->verify(fd.field_holder()));
2322
2323 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2324 return ret;
2325 JNI_END
2326
2327
2328 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2329 JNIWrapper("GetStaticObjectField");
2330 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2331 #if INCLUDE_JNI_CHECK
2332 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2333 #endif // INCLUDE_JNI_CHECK
2334 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2335 assert(id->is_static_field_id(), "invalid static field id");
2336 // Keep JVMTI addition small and only check enabled flag here.
2337 // jni_GetField_probe() assumes that is okay to create handles.
2338 if (JvmtiExport::should_post_field_access()) {
2339 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2340 }
2341 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2342 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2343 return ret;
2344 JNI_END
2345
2346
2347 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2348 , EntryProbe, ReturnProbe) \
2349 \
2350 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2351 , ReturnProbe); \
2352 \
2353 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2354 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2355 EntryProbe; \
2356 Return ret = 0;\
2357 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2358 (const Return&)ret);\
2359 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2360 assert(id->is_static_field_id(), "invalid static field id"); \
2361 /* Keep JVMTI addition small and only check enabled flag here. */ \
2362 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2363 if (JvmtiExport::should_post_field_access()) { \
2364 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2365 } \
2366 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2367 return ret;\
2368 JNI_END
2369
2370 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2371 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2372 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2373 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2374 DEFINE_GETSTATICFIELD(jchar, char, Char
2375 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2376 DEFINE_GETSTATICFIELD(jshort, short, Short
2377 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2378 DEFINE_GETSTATICFIELD(jint, int, Int
2379 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2380 DEFINE_GETSTATICFIELD(jlong, long, Long
2381 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2382 // Float and double probes don't return value because dtrace doesn't currently support it
2383 DEFINE_GETSTATICFIELD(jfloat, float, Float
2384 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2385 DEFINE_GETSTATICFIELD(jdouble, double, Double
2386 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2387
2388 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2389 JNIWrapper("SetStaticObjectField");
2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2391 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2392 assert(id->is_static_field_id(), "invalid static field id");
2393 // Keep JVMTI addition small and only check enabled flag here.
2394 // jni_SetField_probe() assumes that is okay to create handles.
2395 if (JvmtiExport::should_post_field_modification()) {
2396 jvalue field_value;
2397 field_value.l = value;
2398 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2399 }
2400 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2401 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2402 JNI_END
2403
2404
2405
2406 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2407 , EntryProbe, ReturnProbe) \
2408 \
2409 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2410 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2411 EntryProbe; \
2412 \
2413 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2414 assert(id->is_static_field_id(), "invalid static field id"); \
2415 /* Keep JVMTI addition small and only check enabled flag here. */ \
2416 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2417 if (JvmtiExport::should_post_field_modification()) { \
2418 jvalue field_value; \
2419 field_value.unionType = value; \
2420 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2421 } \
2422 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2423 ReturnProbe;\
2424 JNI_END
2425
2426 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2427 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2428 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2429 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2430 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2431 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2432 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2433 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2434 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2435 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2436 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2437 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2438 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2439 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2440 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2441 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2442 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2443 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2444 // Float and double probes don't return value because dtrace doesn't currently support it
2445 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2446 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2447 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2448 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2449 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2450 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2451
2452 //
2453 // String Operations
2454 //
2455
2456 // Unicode Interface
2457
2458 DT_RETURN_MARK_DECL(NewString, jstring
2459 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2460
2461 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2462 JNIWrapper("NewString");
2463 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2464 jstring ret = NULL;
2465 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2466 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2467 ret = (jstring) JNIHandles::make_local(env, string);
2468 return ret;
2469 JNI_END
2470
2471
2472 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2473 JNIWrapper("GetStringLength");
2474 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2475 jsize ret = 0;
2476 oop s = JNIHandles::resolve_non_null(string);
2477 if (java_lang_String::value(s) != NULL) {
2478 ret = java_lang_String::length(s);
2479 }
2480 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2481 return ret;
2482 JNI_END
2483
2484
2485 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2486 JNIEnv *env, jstring string, jboolean *isCopy))
2487 JNIWrapper("GetStringChars");
2488 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2489 jchar* buf = NULL;
2490 oop s = JNIHandles::resolve_non_null(string);
2491 typeArrayOop s_value = java_lang_String::value(s);
2492 if (s_value != NULL) {
2493 int s_len = java_lang_String::length(s);
2494 int s_offset = java_lang_String::offset(s);
2495 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2496 /* JNI Specification states return NULL on OOM */
2497 if (buf != NULL) {
2498 if (s_len > 0) {
2499 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2500 }
2501 buf[s_len] = 0;
2502 //%note jni_5
2503 if (isCopy != NULL) {
2504 *isCopy = JNI_TRUE;
2505 }
2506 }
2507 }
2508 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2509 return buf;
2510 JNI_END
2511
2512
2513 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2514 JNIWrapper("ReleaseStringChars");
2515 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2516 //%note jni_6
2517 if (chars != NULL) {
2518 // Since String objects are supposed to be immutable, don't copy any
2519 // new data back. A bad user will have to go after the char array.
2520 FreeHeap((void*) chars);
2521 }
2522 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2523 JNI_END
2524
2525
2526 // UTF Interface
2527
2528 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2529 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2530
2531 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2532 JNIWrapper("NewStringUTF");
2533 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2534 jstring ret;
2535 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2536
2537 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2538 ret = (jstring) JNIHandles::make_local(env, result);
2539 return ret;
2540 JNI_END
2541
2542
2543 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2544 JNIWrapper("GetStringUTFLength");
2545 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2546 jsize ret = 0;
2547 oop java_string = JNIHandles::resolve_non_null(string);
2548 if (java_lang_String::value(java_string) != NULL) {
2549 ret = java_lang_String::utf8_length(java_string);
2550 }
2551 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2552 return ret;
2553 JNI_END
2554
2555
2556 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2557 JNIWrapper("GetStringUTFChars");
2558 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2559 char* result = NULL;
2560 oop java_string = JNIHandles::resolve_non_null(string);
2561 if (java_lang_String::value(java_string) != NULL) {
2562 size_t length = java_lang_String::utf8_length(java_string);
2563 /* JNI Specification states return NULL on OOM */
2564 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2565 if (result != NULL) {
2566 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2567 if (isCopy != NULL) {
2568 *isCopy = JNI_TRUE;
2569 }
2570 }
2571 }
2572 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2573 return result;
2574 JNI_END
2575
2576
2577 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2578 JNIWrapper("ReleaseStringUTFChars");
2579 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2580 if (chars != NULL) {
2581 FreeHeap((char*) chars);
2582 }
2583 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2584 JNI_END
2585
2586
2587 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2588 JNIWrapper("GetArrayLength");
2589 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2590 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2591 assert(a->is_array(), "must be array");
2592 jsize ret = a->length();
2593 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2594 return ret;
2595 JNI_END
2596
2597
2598 //
2599 // Object Array Operations
2600 //
2601
2602 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2603 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2604
2605 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2606 JNIWrapper("NewObjectArray");
2607 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2608 jobjectArray ret = NULL;
2609 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2610 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2611 Klass* ako = ek()->array_klass(CHECK_NULL);
2612 KlassHandle ak = KlassHandle(THREAD, ako);
2613 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2614 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2615 oop initial_value = JNIHandles::resolve(initialElement);
2616 if (initial_value != NULL) { // array already initialized with NULL
2617 for (int index = 0; index < length; index++) {
2618 result->obj_at_put(index, initial_value);
2619 }
2620 }
2621 ret = (jobjectArray) JNIHandles::make_local(env, result);
2622 return ret;
2623 JNI_END
2624
2625 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2626 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2627
2628 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2629 JNIWrapper("GetObjectArrayElement");
2630 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2631 jobject ret = NULL;
2632 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2633 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2634 if (a->is_within_bounds(index)) {
2635 ret = JNIHandles::make_local(env, a->obj_at(index));
2636 return ret;
2637 } else {
2638 char buf[jintAsStringSize];
2639 sprintf(buf, "%d", index);
2640 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2641 }
2642 JNI_END
2643
2644 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2645 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2646
2647 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2648 JNIWrapper("SetObjectArrayElement");
2649 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2650 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2651
2652 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2653 oop v = JNIHandles::resolve(value);
2654 if (a->is_within_bounds(index)) {
2655 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2656 a->obj_at_put(index, v);
2657 } else {
2658 THROW(vmSymbols::java_lang_ArrayStoreException());
2659 }
2660 } else {
2661 char buf[jintAsStringSize];
2662 sprintf(buf, "%d", index);
2663 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2664 }
2665 JNI_END
2666
2667
2668
2669 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2670 ,EntryProbe,ReturnProbe) \
2671 \
2672 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2673 , ReturnProbe); \
2674 \
2675 JNI_ENTRY(Return, \
2676 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2677 JNIWrapper("New" XSTR(Result) "Array"); \
2678 EntryProbe; \
2679 Return ret = NULL;\
2680 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2681 \
2682 oop obj= oopFactory::Allocator(len, CHECK_0); \
2683 ret = (Return) JNIHandles::make_local(env, obj); \
2684 return ret;\
2685 JNI_END
2686
2687 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2688 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2689 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2690 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2691 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2692 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2693 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2694 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2695 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2696 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2697 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2698 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2699 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2700 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2701 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2702 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2703 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2704 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2705 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2706 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2707 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2708 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2709 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2710 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2711
2712 // Return an address which will fault if the caller writes to it.
2713
2714 static char* get_bad_address() {
2715 static char* bad_address = NULL;
2716 if (bad_address == NULL) {
2717 size_t size = os::vm_allocation_granularity();
2718 bad_address = os::reserve_memory(size);
2719 if (bad_address != NULL) {
2720 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2721 /*is_committed*/false);
2722 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2723 }
2724 }
2725 return bad_address;
2726 }
2727
2728
2729
2730 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2731 , EntryProbe, ReturnProbe) \
2732 \
2733 JNI_QUICK_ENTRY(ElementType*, \
2734 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2735 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2736 EntryProbe; \
2737 /* allocate an chunk of memory in c land */ \
2738 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2739 ElementType* result; \
2740 int len = a->length(); \
2741 if (len == 0) { \
2742 /* Empty array: legal but useless, can't return NULL. \
2743 * Return a pointer to something useless. \
2744 * Avoid asserts in typeArrayOop. */ \
2745 result = (ElementType*)get_bad_address(); \
2746 } else { \
2747 /* JNI Specification states return NULL on OOM */ \
2748 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2749 if (result != NULL) { \
2750 /* copy the array to the c chunk */ \
2751 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2752 if (isCopy) { \
2753 *isCopy = JNI_TRUE; \
2754 } \
2755 } \
2756 } \
2757 ReturnProbe; \
2758 return result; \
2759 JNI_END
2760
2761 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2762 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2763 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2764 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2765 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2766 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2767 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2768 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2769 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2770 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2771 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2772 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2774 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2776 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2777 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2778 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2779 // Float and double probes don't return value because dtrace doesn't currently support it
2780 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2781 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2782 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2783 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2784 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2785 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2786
2787
2788 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2789 , EntryProbe, ReturnProbe);\
2790 \
2791 JNI_QUICK_ENTRY(void, \
2792 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2793 ElementType *buf, jint mode)) \
2794 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2795 EntryProbe; \
2796 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2797 int len = a->length(); \
2798 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2799 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2800 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2801 } \
2802 if ((mode == 0) || (mode == JNI_ABORT)) { \
2803 FreeHeap(buf); \
2804 } \
2805 } \
2806 ReturnProbe; \
2807 JNI_END
2808
2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2810 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2811 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2813 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2814 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2816 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2817 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2819 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2820 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2821 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2822 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2823 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2824 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2825 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2826 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2827 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2828 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2829 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2830 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2831 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2832 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2833
2834
2835 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2836 , EntryProbe, ReturnProbe); \
2837 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2838 , ReturnProbe); \
2839 \
2840 JNI_ENTRY(void, \
2841 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2842 jsize len, ElementType *buf)) \
2843 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2844 EntryProbe; \
2845 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2846 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2847 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2848 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2849 } else { \
2850 if (len > 0) { \
2851 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2852 memcpy((u_char*) buf, \
2853 (u_char*) src->Tag##_at_addr(start), \
2854 len << sc); \
2855 } \
2856 } \
2857 JNI_END
2858
2859 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2860 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2861 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2862 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2863 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2864 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2865 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2866 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2867 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2868 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2869 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2870 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2871 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2872 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2873 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2874 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2875 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2876 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2877 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2878 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2879 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2880 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2881 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2882 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2883
2884
2885 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2886 , EntryProbe, ReturnProbe); \
2887 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2888 ,ReturnProbe); \
2889 \
2890 JNI_ENTRY(void, \
2891 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2892 jsize len, const ElementType *buf)) \
2893 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2894 EntryProbe; \
2895 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2896 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
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->oop_is_instance()) {
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, 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, 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 int s_offset = java_lang_String::offset(s);
3139 typeArrayOop s_value = java_lang_String::value(s);
3140 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3141 }
3142 }
3143 JNI_END
3144
3145 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3146 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3147
3148 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3149 JNIWrapper("GetStringUTFRegion");
3150 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3151 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3152 oop s = JNIHandles::resolve_non_null(string);
3153 int s_len = java_lang_String::length(s);
3154 if (start < 0 || len < 0 || start + len > s_len) {
3155 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3156 } else {
3157 //%note jni_7
3158 if (len > 0) {
3159 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3160 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3161 // as_utf8_string null-terminates the result string
3162 } else {
3163 // JDK null-terminates the buffer even in len is zero
3164 if (buf != NULL) {
3165 buf[0] = 0;
3166 }
3167 }
3168 }
3169 JNI_END
3170
3171
3172 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3173 JNIWrapper("GetPrimitiveArrayCritical");
3174 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3175 GC_locker::lock_critical(thread);
3176 if (isCopy != NULL) {
3177 *isCopy = JNI_FALSE;
3178 }
3179 oop a = JNIHandles::resolve_non_null(array);
3180 assert(a->is_array(), "just checking");
3181 BasicType type;
3182 if (a->is_objArray()) {
3183 type = T_OBJECT;
3184 } else {
3185 type = TypeArrayKlass::cast(a->klass())->element_type();
3186 }
3187 void* ret = arrayOop(a)->base(type);
3188 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3189 return ret;
3190 JNI_END
3191
3192
3193 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3194 JNIWrapper("ReleasePrimitiveArrayCritical");
3195 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3196 // The array, carray and mode arguments are ignored
3197 GC_locker::unlock_critical(thread);
3198 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3199 JNI_END
3200
3201
3202 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3203 JNIWrapper("GetStringCritical");
3204 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3205 GC_locker::lock_critical(thread);
3206 if (isCopy != NULL) {
3207 *isCopy = JNI_FALSE;
3208 }
3209 oop s = JNIHandles::resolve_non_null(string);
3210 int s_len = java_lang_String::length(s);
3211 typeArrayOop s_value = java_lang_String::value(s);
3212 int s_offset = java_lang_String::offset(s);
3213 const jchar* ret;
3214 if (s_len > 0) {
3215 ret = s_value->char_at_addr(s_offset);
3216 } else {
3217 ret = (jchar*) s_value->base(T_CHAR);
3218 }
3219 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3220 return ret;
3221 JNI_END
3222
3223
3224 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3225 JNIWrapper("ReleaseStringCritical");
3226 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3227 // The str and chars arguments are ignored
3228 GC_locker::unlock_critical(thread);
3229 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3230 JNI_END
3231
3232
3233 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3234 JNIWrapper("jni_NewWeakGlobalRef");
3235 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3236 Handle ref_handle(thread, JNIHandles::resolve(ref));
3237 jweak ret = JNIHandles::make_weak_global(ref_handle);
3238 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3239 return ret;
3240 JNI_END
3241
3242 // Must be JNI_ENTRY (with HandleMark)
3243 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3244 JNIWrapper("jni_DeleteWeakGlobalRef");
3245 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3246 JNIHandles::destroy_weak_global(ref);
3247 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3248 JNI_END
3249
3250
3251 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3252 JNIWrapper("jni_ExceptionCheck");
3253 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3254 jni_check_async_exceptions(thread);
3255 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3256 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3257 return ret;
3258 JNI_END
3259
3260
3261 // Initialization state for three routines below relating to
3262 // java.nio.DirectBuffers
3263 static jint directBufferSupportInitializeStarted = 0;
3264 static volatile jint directBufferSupportInitializeEnded = 0;
3265 static volatile jint directBufferSupportInitializeFailed = 0;
3266 static jclass bufferClass = NULL;
3267 static jclass directBufferClass = NULL;
3268 static jclass directByteBufferClass = NULL;
3269 static jmethodID directByteBufferConstructor = NULL;
3270 static jfieldID directBufferAddressField = NULL;
3271 static jfieldID bufferCapacityField = NULL;
3272
3273 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3274 Handle loader; // null (bootstrap) loader
3275 Handle protection_domain; // null protection domain
3276
3277 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3278 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3279
3280 if (TraceClassResolution && result != NULL) {
3281 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3282 }
3283 return result;
3284 }
3285
3286 // These lookups are done with the NULL (bootstrap) ClassLoader to
3287 // circumvent any security checks that would be done by jni_FindClass.
3288 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3289 {
3290 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3291 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3292 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3293 return true;
3294 }
3295 JNI_END
3296
3297
3298 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3299 if (directBufferSupportInitializeFailed) {
3300 return false;
3301 }
3302
3303 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3304 if (!lookupDirectBufferClasses(env)) {
3305 directBufferSupportInitializeFailed = 1;
3306 return false;
3307 }
3308
3309 // Make global references for these
3310 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3311 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3312 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3313
3314 // Get needed field and method IDs
3315 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3316 if (env->ExceptionCheck()) {
3317 env->ExceptionClear();
3318 directBufferSupportInitializeFailed = 1;
3319 return false;
3320 }
3321 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3322 if (env->ExceptionCheck()) {
3323 env->ExceptionClear();
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3328 if (env->ExceptionCheck()) {
3329 env->ExceptionClear();
3330 directBufferSupportInitializeFailed = 1;
3331 return false;
3332 }
3333
3334 if ((directByteBufferConstructor == NULL) ||
3335 (directBufferAddressField == NULL) ||
3336 (bufferCapacityField == NULL)) {
3337 directBufferSupportInitializeFailed = 1;
3338 return false;
3339 }
3340
3341 directBufferSupportInitializeEnded = 1;
3342 } else {
3343 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3344 os::naked_yield();
3345 }
3346 }
3347
3348 return !directBufferSupportInitializeFailed;
3349 }
3350
3351 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3352 {
3353 // thread_from_jni_environment() will block if VM is gone.
3354 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3355
3356 JNIWrapper("jni_NewDirectByteBuffer");
3357 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3358
3359 if (!directBufferSupportInitializeEnded) {
3360 if (!initializeDirectBufferSupport(env, thread)) {
3361 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3362 return NULL;
3363 }
3364 }
3365
3366 // Being paranoid about accidental sign extension on address
3367 jlong addr = (jlong) ((uintptr_t) address);
3368 // NOTE that package-private DirectByteBuffer constructor currently
3369 // takes int capacity
3370 jint cap = (jint) capacity;
3371 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3372 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3373 return ret;
3374 }
3375
3376 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3377 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3378
3379 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3380 {
3381 // thread_from_jni_environment() will block if VM is gone.
3382 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3383
3384 JNIWrapper("jni_GetDirectBufferAddress");
3385 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3386 void* ret = NULL;
3387 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3388
3389 if (!directBufferSupportInitializeEnded) {
3390 if (!initializeDirectBufferSupport(env, thread)) {
3391 return 0;
3392 }
3393 }
3394
3395 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3396 return 0;
3397 }
3398
3399 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3400 return ret;
3401 }
3402
3403 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3404 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3405
3406 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3407 {
3408 // thread_from_jni_environment() will block if VM is gone.
3409 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3410
3411 JNIWrapper("jni_GetDirectBufferCapacity");
3412 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3413 jlong ret = -1;
3414 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3415
3416 if (!directBufferSupportInitializeEnded) {
3417 if (!initializeDirectBufferSupport(env, thread)) {
3418 ret = 0;
3419 return ret;
3420 }
3421 }
3422
3423 if (buf == NULL) {
3424 return -1;
3425 }
3426
3427 if (!env->IsInstanceOf(buf, directBufferClass)) {
3428 return -1;
3429 }
3430
3431 // NOTE that capacity is currently an int in the implementation
3432 ret = env->GetIntField(buf, bufferCapacityField);
3433 return ret;
3434 }
3435
3436
3437 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3438 JNIWrapper("GetVersion");
3439 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3440 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3441 return CurrentVersion;
3442 JNI_END
3443
3444 extern struct JavaVM_ main_vm;
3445
3446 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3447 JNIWrapper("jni_GetJavaVM");
3448 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3449 *vm = (JavaVM *)(&main_vm);
3450 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3451 return JNI_OK;
3452 JNI_END
3453
3454 // Structure containing all jni functions
3455 struct JNINativeInterface_ jni_NativeInterface = {
3456 NULL,
3457 NULL,
3458 NULL,
3459
3460 NULL,
3461
3462 jni_GetVersion,
3463
3464 jni_DefineClass,
3465 jni_FindClass,
3466
3467 jni_FromReflectedMethod,
3468 jni_FromReflectedField,
3469
3470 jni_ToReflectedMethod,
3471
3472 jni_GetSuperclass,
3473 jni_IsAssignableFrom,
3474
3475 jni_ToReflectedField,
3476
3477 jni_Throw,
3478 jni_ThrowNew,
3479 jni_ExceptionOccurred,
3480 jni_ExceptionDescribe,
3481 jni_ExceptionClear,
3482 jni_FatalError,
3483
3484 jni_PushLocalFrame,
3485 jni_PopLocalFrame,
3486
3487 jni_NewGlobalRef,
3488 jni_DeleteGlobalRef,
3489 jni_DeleteLocalRef,
3490 jni_IsSameObject,
3491
3492 jni_NewLocalRef,
3493 jni_EnsureLocalCapacity,
3494
3495 jni_AllocObject,
3496 jni_NewObject,
3497 jni_NewObjectV,
3498 jni_NewObjectA,
3499
3500 jni_GetObjectClass,
3501 jni_IsInstanceOf,
3502
3503 jni_GetMethodID,
3504
3505 jni_CallObjectMethod,
3506 jni_CallObjectMethodV,
3507 jni_CallObjectMethodA,
3508 jni_CallBooleanMethod,
3509 jni_CallBooleanMethodV,
3510 jni_CallBooleanMethodA,
3511 jni_CallByteMethod,
3512 jni_CallByteMethodV,
3513 jni_CallByteMethodA,
3514 jni_CallCharMethod,
3515 jni_CallCharMethodV,
3516 jni_CallCharMethodA,
3517 jni_CallShortMethod,
3518 jni_CallShortMethodV,
3519 jni_CallShortMethodA,
3520 jni_CallIntMethod,
3521 jni_CallIntMethodV,
3522 jni_CallIntMethodA,
3523 jni_CallLongMethod,
3524 jni_CallLongMethodV,
3525 jni_CallLongMethodA,
3526 jni_CallFloatMethod,
3527 jni_CallFloatMethodV,
3528 jni_CallFloatMethodA,
3529 jni_CallDoubleMethod,
3530 jni_CallDoubleMethodV,
3531 jni_CallDoubleMethodA,
3532 jni_CallVoidMethod,
3533 jni_CallVoidMethodV,
3534 jni_CallVoidMethodA,
3535
3536 jni_CallNonvirtualObjectMethod,
3537 jni_CallNonvirtualObjectMethodV,
3538 jni_CallNonvirtualObjectMethodA,
3539 jni_CallNonvirtualBooleanMethod,
3540 jni_CallNonvirtualBooleanMethodV,
3541 jni_CallNonvirtualBooleanMethodA,
3542 jni_CallNonvirtualByteMethod,
3543 jni_CallNonvirtualByteMethodV,
3544 jni_CallNonvirtualByteMethodA,
3545 jni_CallNonvirtualCharMethod,
3546 jni_CallNonvirtualCharMethodV,
3547 jni_CallNonvirtualCharMethodA,
3548 jni_CallNonvirtualShortMethod,
3549 jni_CallNonvirtualShortMethodV,
3550 jni_CallNonvirtualShortMethodA,
3551 jni_CallNonvirtualIntMethod,
3552 jni_CallNonvirtualIntMethodV,
3553 jni_CallNonvirtualIntMethodA,
3554 jni_CallNonvirtualLongMethod,
3555 jni_CallNonvirtualLongMethodV,
3556 jni_CallNonvirtualLongMethodA,
3557 jni_CallNonvirtualFloatMethod,
3558 jni_CallNonvirtualFloatMethodV,
3559 jni_CallNonvirtualFloatMethodA,
3560 jni_CallNonvirtualDoubleMethod,
3561 jni_CallNonvirtualDoubleMethodV,
3562 jni_CallNonvirtualDoubleMethodA,
3563 jni_CallNonvirtualVoidMethod,
3564 jni_CallNonvirtualVoidMethodV,
3565 jni_CallNonvirtualVoidMethodA,
3566
3567 jni_GetFieldID,
3568
3569 jni_GetObjectField,
3570 jni_GetBooleanField,
3571 jni_GetByteField,
3572 jni_GetCharField,
3573 jni_GetShortField,
3574 jni_GetIntField,
3575 jni_GetLongField,
3576 jni_GetFloatField,
3577 jni_GetDoubleField,
3578
3579 jni_SetObjectField,
3580 jni_SetBooleanField,
3581 jni_SetByteField,
3582 jni_SetCharField,
3583 jni_SetShortField,
3584 jni_SetIntField,
3585 jni_SetLongField,
3586 jni_SetFloatField,
3587 jni_SetDoubleField,
3588
3589 jni_GetStaticMethodID,
3590
3591 jni_CallStaticObjectMethod,
3592 jni_CallStaticObjectMethodV,
3593 jni_CallStaticObjectMethodA,
3594 jni_CallStaticBooleanMethod,
3595 jni_CallStaticBooleanMethodV,
3596 jni_CallStaticBooleanMethodA,
3597 jni_CallStaticByteMethod,
3598 jni_CallStaticByteMethodV,
3599 jni_CallStaticByteMethodA,
3600 jni_CallStaticCharMethod,
3601 jni_CallStaticCharMethodV,
3602 jni_CallStaticCharMethodA,
3603 jni_CallStaticShortMethod,
3604 jni_CallStaticShortMethodV,
3605 jni_CallStaticShortMethodA,
3606 jni_CallStaticIntMethod,
3607 jni_CallStaticIntMethodV,
3608 jni_CallStaticIntMethodA,
3609 jni_CallStaticLongMethod,
3610 jni_CallStaticLongMethodV,
3611 jni_CallStaticLongMethodA,
3612 jni_CallStaticFloatMethod,
3613 jni_CallStaticFloatMethodV,
3614 jni_CallStaticFloatMethodA,
3615 jni_CallStaticDoubleMethod,
3616 jni_CallStaticDoubleMethodV,
3617 jni_CallStaticDoubleMethodA,
3618 jni_CallStaticVoidMethod,
3619 jni_CallStaticVoidMethodV,
3620 jni_CallStaticVoidMethodA,
3621
3622 jni_GetStaticFieldID,
3623
3624 jni_GetStaticObjectField,
3625 jni_GetStaticBooleanField,
3626 jni_GetStaticByteField,
3627 jni_GetStaticCharField,
3628 jni_GetStaticShortField,
3629 jni_GetStaticIntField,
3630 jni_GetStaticLongField,
3631 jni_GetStaticFloatField,
3632 jni_GetStaticDoubleField,
3633
3634 jni_SetStaticObjectField,
3635 jni_SetStaticBooleanField,
3636 jni_SetStaticByteField,
3637 jni_SetStaticCharField,
3638 jni_SetStaticShortField,
3639 jni_SetStaticIntField,
3640 jni_SetStaticLongField,
3641 jni_SetStaticFloatField,
3642 jni_SetStaticDoubleField,
3643
3644 jni_NewString,
3645 jni_GetStringLength,
3646 jni_GetStringChars,
3647 jni_ReleaseStringChars,
3648
3649 jni_NewStringUTF,
3650 jni_GetStringUTFLength,
3651 jni_GetStringUTFChars,
3652 jni_ReleaseStringUTFChars,
3653
3654 jni_GetArrayLength,
3655
3656 jni_NewObjectArray,
3657 jni_GetObjectArrayElement,
3658 jni_SetObjectArrayElement,
3659
3660 jni_NewBooleanArray,
3661 jni_NewByteArray,
3662 jni_NewCharArray,
3663 jni_NewShortArray,
3664 jni_NewIntArray,
3665 jni_NewLongArray,
3666 jni_NewFloatArray,
3667 jni_NewDoubleArray,
3668
3669 jni_GetBooleanArrayElements,
3670 jni_GetByteArrayElements,
3671 jni_GetCharArrayElements,
3672 jni_GetShortArrayElements,
3673 jni_GetIntArrayElements,
3674 jni_GetLongArrayElements,
3675 jni_GetFloatArrayElements,
3676 jni_GetDoubleArrayElements,
3677
3678 jni_ReleaseBooleanArrayElements,
3679 jni_ReleaseByteArrayElements,
3680 jni_ReleaseCharArrayElements,
3681 jni_ReleaseShortArrayElements,
3682 jni_ReleaseIntArrayElements,
3683 jni_ReleaseLongArrayElements,
3684 jni_ReleaseFloatArrayElements,
3685 jni_ReleaseDoubleArrayElements,
3686
3687 jni_GetBooleanArrayRegion,
3688 jni_GetByteArrayRegion,
3689 jni_GetCharArrayRegion,
3690 jni_GetShortArrayRegion,
3691 jni_GetIntArrayRegion,
3692 jni_GetLongArrayRegion,
3693 jni_GetFloatArrayRegion,
3694 jni_GetDoubleArrayRegion,
3695
3696 jni_SetBooleanArrayRegion,
3697 jni_SetByteArrayRegion,
3698 jni_SetCharArrayRegion,
3699 jni_SetShortArrayRegion,
3700 jni_SetIntArrayRegion,
3701 jni_SetLongArrayRegion,
3702 jni_SetFloatArrayRegion,
3703 jni_SetDoubleArrayRegion,
3704
3705 jni_RegisterNatives,
3706 jni_UnregisterNatives,
3707
3708 jni_MonitorEnter,
3709 jni_MonitorExit,
3710
3711 jni_GetJavaVM,
3712
3713 jni_GetStringRegion,
3714 jni_GetStringUTFRegion,
3715
3716 jni_GetPrimitiveArrayCritical,
3717 jni_ReleasePrimitiveArrayCritical,
3718
3719 jni_GetStringCritical,
3720 jni_ReleaseStringCritical,
3721
3722 jni_NewWeakGlobalRef,
3723 jni_DeleteWeakGlobalRef,
3724
3725 jni_ExceptionCheck,
3726
3727 jni_NewDirectByteBuffer,
3728 jni_GetDirectBufferAddress,
3729 jni_GetDirectBufferCapacity,
3730
3731 // New 1_6 features
3732
3733 jni_GetObjectRefType
3734 };
3735
3736
3737 // For jvmti use to modify jni function table.
3738 // Java threads in native contiues to run until it is transitioned
3739 // to VM at safepoint. Before the transition or before it is blocked
3740 // for safepoint it may access jni function table. VM could crash if
3741 // any java thread access the jni function table in the middle of memcpy.
3742 // To avoid this each function pointers are copied automically.
3743 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3744 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3745 intptr_t *a = (intptr_t *) jni_functions();
3746 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3747 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3748 Atomic::store_ptr(*b++, a++);
3749 }
3750 }
3751
3752 void quicken_jni_functions() {
3753 // Replace Get<Primitive>Field with fast versions
3754 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3755 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3756 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3757 // windows x86 currently needs SEH wrapper and the gain of the fast
3758 // versions currently isn't certain for server vm on uniprocessor.
3759 && os::is_MP()
3760 #endif
3761 ) {
3762 address func;
3763 func = JNI_FastGetField::generate_fast_get_boolean_field();
3764 if (func != (address)-1) {
3765 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3766 }
3767 func = JNI_FastGetField::generate_fast_get_byte_field();
3768 if (func != (address)-1) {
3769 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3770 }
3771 func = JNI_FastGetField::generate_fast_get_char_field();
3772 if (func != (address)-1) {
3773 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3774 }
3775 func = JNI_FastGetField::generate_fast_get_short_field();
3776 if (func != (address)-1) {
3777 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3778 }
3779 func = JNI_FastGetField::generate_fast_get_int_field();
3780 if (func != (address)-1) {
3781 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3782 }
3783 func = JNI_FastGetField::generate_fast_get_long_field();
3784 if (func != (address)-1) {
3785 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3786 }
3787 func = JNI_FastGetField::generate_fast_get_float_field();
3788 if (func != (address)-1) {
3789 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3790 }
3791 func = JNI_FastGetField::generate_fast_get_double_field();
3792 if (func != (address)-1) {
3793 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3794 }
3795 }
3796 }
3797
3798 // Returns the function structure
3799 struct JNINativeInterface_* jni_functions() {
3800 #if INCLUDE_JNI_CHECK
3801 if (CheckJNICalls) return jni_functions_check();
3802 #endif // INCLUDE_JNI_CHECK
3803 return &jni_NativeInterface;
3804 }
3805
3806 // Returns the function structure
3807 struct JNINativeInterface_* jni_functions_nocheck() {
3808 return &jni_NativeInterface;
3809 }
3810
3811
3812 // Invocation API
3813
3814
3815 // Forward declaration
3816 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3817
3818 // Global invocation API vars
3819 volatile jint vm_created = 0;
3820 // Indicate whether it is safe to recreate VM
3821 volatile jint safe_to_recreate_vm = 1;
3822 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3823
3824
3825 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3826 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3827
3828 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3829 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3830
3831 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3832 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3833 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3834 jint ret = JNI_ERR;
3835 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3836
3837 if (Threads::is_supported_jni_version(args->version)) {
3838 ret = JNI_OK;
3839 }
3840 // 1.1 style no longer supported in hotspot.
3841 // According the JNI spec, we should update args->version on return.
3842 // We also use the structure to communicate with launcher about default
3843 // stack size.
3844 if (args->version == JNI_VERSION_1_1) {
3845 args->version = JNI_VERSION_1_2;
3846 // javaStackSize is int in arguments structure
3847 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3848 args->javaStackSize = (jint)(ThreadStackSize * K);
3849 }
3850 return ret;
3851 }
3852
3853 #ifndef PRODUCT
3854
3855 #include "gc/shared/collectedHeap.hpp"
3856 #include "gc/shared/gcTimer.hpp"
3857 #if INCLUDE_ALL_GCS
3858 #include "gc/g1/heapRegionRemSet.hpp"
3859 #endif
3860 #include "memory/guardedMemory.hpp"
3861 #include "utilities/ostream.hpp"
3862 #include "utilities/quickSort.hpp"
3863 #if INCLUDE_VM_STRUCTS
3864 #include "runtime/vmStructs.hpp"
3865 #endif
3866
3867 #define run_unit_test(unit_test_function_call) \
3868 tty->print_cr("Running test: " #unit_test_function_call); \
3869 unit_test_function_call
3870
3871 // Forward declaration
3872 void TestOS_test();
3873 void TestReservedSpace_test();
3874 void TestReserveMemorySpecial_test();
3875 void TestVirtualSpace_test();
3876 void TestMetaspaceAux_test();
3877 void TestMetachunk_test();
3878 void TestVirtualSpaceNode_test();
3879 void TestNewSize_test();
3880 void TestOldSize_test();
3881 void TestKlass_test();
3882 void TestBitMap_test();
3883 void TestAsUtf8();
3884 void Test_linked_list();
3885 void TestChunkedList_test();
3886 #if INCLUDE_ALL_GCS
3887 void TestOldFreeSpaceCalculation_test();
3888 void TestG1BiasedArray_test();
3889 void TestBufferingOopClosure_test();
3890 void TestCodeCacheRemSet_test();
3891 void FreeRegionList_test();
3892 #endif
3893
3894 void execute_internal_vm_tests() {
3895 if (ExecuteInternalVMTests) {
3896 tty->print_cr("Running internal VM tests");
3897 run_unit_test(TestOS_test());
3898 run_unit_test(TestReservedSpace_test());
3899 run_unit_test(TestReserveMemorySpecial_test());
3900 run_unit_test(TestVirtualSpace_test());
3901 run_unit_test(TestMetaspaceAux_test());
3902 run_unit_test(TestMetachunk_test());
3903 run_unit_test(TestVirtualSpaceNode_test());
3904 run_unit_test(GlobalDefinitions::test_globals());
3905 run_unit_test(GCTimerAllTest::all());
3906 run_unit_test(arrayOopDesc::test_max_array_length());
3907 run_unit_test(CollectedHeap::test_is_in());
3908 run_unit_test(QuickSort::test_quick_sort());
3909 run_unit_test(GuardedMemory::test_guarded_memory());
3910 run_unit_test(AltHashing::test_alt_hash());
3911 run_unit_test(test_loggc_filename());
3912 run_unit_test(TestNewSize_test());
3913 run_unit_test(TestOldSize_test());
3914 run_unit_test(TestKlass_test());
3915 run_unit_test(TestBitMap_test());
3916 run_unit_test(TestAsUtf8());
3917 run_unit_test(ObjectMonitor::sanity_checks());
3918 run_unit_test(Test_linked_list());
3919 run_unit_test(TestChunkedList_test());
3920 #if INCLUDE_VM_STRUCTS
3921 run_unit_test(VMStructs::test());
3922 #endif
3923 #if INCLUDE_ALL_GCS
3924 run_unit_test(TestOldFreeSpaceCalculation_test());
3925 run_unit_test(TestG1BiasedArray_test());
3926 run_unit_test(HeapRegionRemSet::test_prt());
3927 run_unit_test(TestBufferingOopClosure_test());
3928 run_unit_test(TestCodeCacheRemSet_test());
3929 if (UseG1GC) {
3930 run_unit_test(FreeRegionList_test());
3931 }
3932 #endif
3933 tty->print_cr("All internal VM tests passed");
3934 }
3935 }
3936
3937 #undef run_unit_test
3938
3939 #endif
3940
3941 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3942 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3943
3944 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3945 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3946
3947 jint result = JNI_ERR;
3948 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3949
3950 // We're about to use Atomic::xchg for synchronization. Some Zero
3951 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3952 // but __sync_lock_test_and_set is not guaranteed to do what we want
3953 // on all architectures. So we check it works before relying on it.
3954 #if defined(ZERO) && defined(ASSERT)
3955 {
3956 jint a = 0xcafebabe;
3957 jint b = Atomic::xchg(0xdeadbeef, &a);
3958 void *c = &a;
3959 void *d = Atomic::xchg_ptr(&b, &c);
3960 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3961 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3962 }
3963 #endif // ZERO && ASSERT
3964
3965 // At the moment it's only possible to have one Java VM,
3966 // since some of the runtime state is in global variables.
3967
3968 // We cannot use our mutex locks here, since they only work on
3969 // Threads. We do an atomic compare and exchange to ensure only
3970 // one thread can call this method at a time
3971
3972 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3973 // the add/dec implementations are dependent on whether we are running
3974 // on a multiprocessor, and at this stage of initialization the os::is_MP
3975 // function used to determine this will always return false. Atomic::xchg
3976 // does not have this problem.
3977 if (Atomic::xchg(1, &vm_created) == 1) {
3978 return JNI_EEXIST; // already created, or create attempt in progress
3979 }
3980 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3981 return JNI_ERR; // someone tried and failed and retry not allowed.
3982 }
3983
3984 assert(vm_created == 1, "vm_created is true during the creation");
3985
3986 /**
3987 * Certain errors during initialization are recoverable and do not
3988 * prevent this method from being called again at a later time
3989 * (perhaps with different arguments). However, at a certain
3990 * point during initialization if an error occurs we cannot allow
3991 * this function to be called again (or it will crash). In those
3992 * situations, the 'canTryAgain' flag is set to false, which atomically
3993 * sets safe_to_recreate_vm to 1, such that any new call to
3994 * JNI_CreateJavaVM will immediately fail using the above logic.
3995 */
3996 bool can_try_again = true;
3997
3998 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3999 if (result == JNI_OK) {
4000 JavaThread *thread = JavaThread::current();
4001 assert(!thread->has_pending_exception(), "should have returned not OK");
4002 /* thread is thread_in_vm here */
4003 *vm = (JavaVM *)(&main_vm);
4004 *(JNIEnv**)penv = thread->jni_environment();
4005
4006 // Tracks the time application was running before GC
4007 RuntimeService::record_application_start();
4008
4009 // Notify JVMTI
4010 if (JvmtiExport::should_post_thread_life()) {
4011 JvmtiExport::post_thread_start(thread);
4012 }
4013
4014 EventThreadStart event;
4015 if (event.should_commit()) {
4016 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4017 event.commit();
4018 }
4019
4020 #ifndef PRODUCT
4021 // Check if we should compile all classes on bootclasspath
4022 if (CompileTheWorld) ClassLoader::compile_the_world();
4023 if (ReplayCompiles) ciReplay::replay(thread);
4024
4025 // Some platforms (like Win*) need a wrapper around these test
4026 // functions in order to properly handle error conditions.
4027 test_error_handler();
4028 execute_internal_vm_tests();
4029 #endif
4030
4031 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4032 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4033 } else {
4034 // If create_vm exits because of a pending exception, exit with that
4035 // exception. In the future when we figure out how to reclaim memory,
4036 // we may be able to exit with JNI_ERR and allow the calling application
4037 // to continue.
4038 if (Universe::is_fully_initialized()) {
4039 // otherwise no pending exception possible - VM will already have aborted
4040 JavaThread* THREAD = JavaThread::current();
4041 if (HAS_PENDING_EXCEPTION) {
4042 HandleMark hm;
4043 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4044 }
4045 }
4046
4047 if (can_try_again) {
4048 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4049 safe_to_recreate_vm = 1;
4050 }
4051
4052 // Creation failed. We must reset vm_created
4053 *vm = 0;
4054 *(JNIEnv**)penv = 0;
4055 // reset vm_created last to avoid race condition. Use OrderAccess to
4056 // control both compiler and architectural-based reordering.
4057 OrderAccess::release_store(&vm_created, 0);
4058 }
4059
4060 return result;
4061
4062 }
4063
4064 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4065 jint result = 0;
4066 // On Windows, let CreateJavaVM run with SEH protection
4067 #ifdef _WIN32
4068 __try {
4069 #endif
4070 result = JNI_CreateJavaVM_inner(vm, penv, args);
4071 #ifdef _WIN32
4072 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4073 // Nothing to do.
4074 }
4075 #endif
4076 return result;
4077 }
4078
4079 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4080 // See bug 4367188, the wrapper can sometimes cause VM crashes
4081 // JNIWrapper("GetCreatedJavaVMs");
4082
4083 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4084
4085 if (vm_created) {
4086 if (numVMs != NULL) *numVMs = 1;
4087 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4088 } else {
4089 if (numVMs != NULL) *numVMs = 0;
4090 }
4091 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4092 return JNI_OK;
4093 }
4094
4095 extern "C" {
4096
4097 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4098 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4099
4100 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4101 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4102 jint res = JNI_ERR;
4103 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4104
4105 if (!vm_created) {
4106 res = JNI_ERR;
4107 return res;
4108 }
4109
4110 JNIWrapper("DestroyJavaVM");
4111 JNIEnv *env;
4112 JavaVMAttachArgs destroyargs;
4113 destroyargs.version = CurrentVersion;
4114 destroyargs.name = (char *)"DestroyJavaVM";
4115 destroyargs.group = NULL;
4116 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4117 if (res != JNI_OK) {
4118 return res;
4119 }
4120
4121 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4122 JavaThread* thread = JavaThread::current();
4123 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4124 if (Threads::destroy_vm()) {
4125 // Should not change thread state, VM is gone
4126 vm_created = false;
4127 res = JNI_OK;
4128 return res;
4129 } else {
4130 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4131 res = JNI_ERR;
4132 return res;
4133 }
4134 }
4135
4136
4137 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4138 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4139
4140 // Check below commented out from JDK1.2fcs as well
4141 /*
4142 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4143 return JNI_EVERSION;
4144 }
4145 */
4146
4147 Thread* t = ThreadLocalStorage::get_thread_slow();
4148 if (t != NULL) {
4149 // If the thread has been attached this operation is a no-op
4150 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4151 return JNI_OK;
4152 }
4153
4154 // Create a thread and mark it as attaching so it will be skipped by the
4155 // ThreadsListEnumerator - see CR 6404306
4156 JavaThread* thread = new JavaThread(true);
4157
4158 // Set correct safepoint info. The thread is going to call into Java when
4159 // initializing the Java level thread object. Hence, the correct state must
4160 // be set in order for the Safepoint code to deal with it correctly.
4161 thread->set_thread_state(_thread_in_vm);
4162 // Must do this before initialize_thread_local_storage
4163 thread->record_stack_base_and_size();
4164
4165 thread->initialize_thread_local_storage();
4166
4167 if (!os::create_attached_thread(thread)) {
4168 delete thread;
4169 return JNI_ERR;
4170 }
4171 // Enable stack overflow checks
4172 thread->create_stack_guard_pages();
4173
4174 thread->initialize_tlab();
4175
4176 thread->cache_global_variables();
4177
4178 // Crucial that we do not have a safepoint check for this thread, since it has
4179 // not been added to the Thread list yet.
4180 { Threads_lock->lock_without_safepoint_check();
4181 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4182 // avoid this thread trying to do a GC before it is added to the thread-list
4183 thread->set_active_handles(JNIHandleBlock::allocate_block());
4184 Threads::add(thread, daemon);
4185 Threads_lock->unlock();
4186 }
4187 // Create thread group and name info from attach arguments
4188 oop group = NULL;
4189 char* thread_name = NULL;
4190 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4191 group = JNIHandles::resolve(args->group);
4192 thread_name = args->name; // may be NULL
4193 }
4194 if (group == NULL) group = Universe::main_thread_group();
4195
4196 // Create Java level thread object and attach it to this thread
4197 bool attach_failed = false;
4198 {
4199 EXCEPTION_MARK;
4200 HandleMark hm(THREAD);
4201 Handle thread_group(THREAD, group);
4202 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4203 if (HAS_PENDING_EXCEPTION) {
4204 CLEAR_PENDING_EXCEPTION;
4205 // cleanup outside the handle mark.
4206 attach_failed = true;
4207 }
4208 }
4209
4210 if (attach_failed) {
4211 // Added missing cleanup
4212 thread->cleanup_failed_attach_current_thread();
4213 return JNI_ERR;
4214 }
4215
4216 // mark the thread as no longer attaching
4217 // this uses a fence to push the change through so we don't have
4218 // to regrab the threads_lock
4219 thread->set_done_attaching_via_jni();
4220
4221 // Set java thread status.
4222 java_lang_Thread::set_thread_status(thread->threadObj(),
4223 java_lang_Thread::RUNNABLE);
4224
4225 // Notify the debugger
4226 if (JvmtiExport::should_post_thread_life()) {
4227 JvmtiExport::post_thread_start(thread);
4228 }
4229
4230 EventThreadStart event;
4231 if (event.should_commit()) {
4232 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4233 event.commit();
4234 }
4235
4236 *(JNIEnv**)penv = thread->jni_environment();
4237
4238 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4239 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4240 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4241 // needed.
4242
4243 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4244
4245 // Perform any platform dependent FPU setup
4246 os::setup_fpu();
4247
4248 return JNI_OK;
4249 }
4250
4251
4252 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4253 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4254 if (!vm_created) {
4255 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4256 return JNI_ERR;
4257 }
4258
4259 JNIWrapper("AttachCurrentThread");
4260 jint ret = attach_current_thread(vm, penv, _args, false);
4261 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4262 return ret;
4263 }
4264
4265
4266 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4267 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4268 VM_Exit::block_if_vm_exited();
4269
4270 JNIWrapper("DetachCurrentThread");
4271
4272 // If the thread has been deattacted the operations is a no-op
4273 if (ThreadLocalStorage::thread() == NULL) {
4274 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4275 return JNI_OK;
4276 }
4277
4278 JavaThread* thread = JavaThread::current();
4279 if (thread->has_last_Java_frame()) {
4280 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4281 // Can't detach a thread that's running java, that can't work.
4282 return JNI_ERR;
4283 }
4284
4285 // Safepoint support. Have to do call-back to safepoint code, if in the
4286 // middel of a safepoint operation
4287 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4288
4289 // XXX: Note that JavaThread::exit() call below removes the guards on the
4290 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4291 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4292 // of the guards is visible in jni_AttachCurrentThread above,
4293 // the removal of the guards is buried below in JavaThread::exit()
4294 // here. The abstraction should be more symmetrically either exposed
4295 // or hidden (e.g. it could probably be hidden in the same
4296 // (platform-dependent) methods where we do alternate stack
4297 // maintenance work?)
4298 thread->exit(false, JavaThread::jni_detach);
4299 delete thread;
4300
4301 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4302 return JNI_OK;
4303 }
4304
4305 DT_RETURN_MARK_DECL(GetEnv, jint
4306 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4307
4308 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4309 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4310 jint ret = JNI_ERR;
4311 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4312
4313 if (!vm_created) {
4314 *penv = NULL;
4315 ret = JNI_EDETACHED;
4316 return ret;
4317 }
4318
4319 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4320 return ret;
4321 }
4322
4323 #ifndef JVMPI_VERSION_1
4324 // need these in order to be polite about older agents
4325 #define JVMPI_VERSION_1 ((jint)0x10000001)
4326 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4327 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4328 #endif // !JVMPI_VERSION_1
4329
4330 Thread* thread = ThreadLocalStorage::thread();
4331 if (thread != NULL && thread->is_Java_thread()) {
4332 if (Threads::is_supported_jni_version_including_1_1(version)) {
4333 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4334 ret = JNI_OK;
4335 return ret;
4336
4337 } else if (version == JVMPI_VERSION_1 ||
4338 version == JVMPI_VERSION_1_1 ||
4339 version == JVMPI_VERSION_1_2) {
4340 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4341 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4342 ret = JNI_EVERSION;
4343 return ret;
4344 } else if (JvmtiExport::is_jvmdi_version(version)) {
4345 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4346 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4347 ret = JNI_EVERSION;
4348 return ret;
4349 } else {
4350 *penv = NULL;
4351 ret = JNI_EVERSION;
4352 return ret;
4353 }
4354 } else {
4355 *penv = NULL;
4356 ret = JNI_EDETACHED;
4357 return ret;
4358 }
4359 }
4360
4361
4362 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4363 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4364 if (!vm_created) {
4365 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4366 return JNI_ERR;
4367 }
4368
4369 JNIWrapper("AttachCurrentThreadAsDaemon");
4370 jint ret = attach_current_thread(vm, penv, _args, true);
4371 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4372 return ret;
4373 }
4374
4375
4376 } // End extern "C"
4377
4378 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4379 NULL,
4380 NULL,
4381 NULL,
4382
4383 jni_DestroyJavaVM,
4384 jni_AttachCurrentThread,
4385 jni_DetachCurrentThread,
4386 jni_GetEnv,
4387 jni_AttachCurrentThreadAsDaemon
4388 };