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 "gc/shared/gcLocker.inline.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "memory/allocation.hpp"
37 #include "memory/allocation.inline.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceOop.hpp"
42 #include "oops/markOop.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "oops/typeArrayKlass.hpp"
49 #include "oops/typeArrayOop.hpp"
50 #include "prims/jni.h"
51 #include "prims/jniCheck.hpp"
52 #include "prims/jniExport.hpp"
53 #include "prims/jniFastGetField.hpp"
54 #include "prims/jvm.h"
55 #include "prims/jvm_misc.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "runtime/atomic.inline.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/fieldDescriptor.hpp"
61 #include "runtime/fprofiler.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/interfaceSupport.hpp"
64 #include "runtime/java.hpp"
65 #include "runtime/javaCalls.hpp"
66 #include "runtime/jfieldIDWorkaround.hpp"
67 #include "runtime/orderAccess.inline.hpp"
68 #include "runtime/reflection.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/signature.hpp"
71 #include "runtime/thread.inline.hpp"
72 #include "runtime/vm_operations.hpp"
73 #include "services/memTracker.hpp"
74 #include "services/runtimeService.hpp"
75 #include "trace/tracing.hpp"
76 #include "utilities/defaultStream.hpp"
77 #include "utilities/dtrace.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/histogram.hpp"
80 #include "utilities/macros.hpp"
81 #if INCLUDE_ALL_GCS
82 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
83 #endif // INCLUDE_ALL_GCS
84
85 static jint CurrentVersion = JNI_VERSION_1_8;
86
87 #ifdef _WIN32
88 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
89 #endif
90
91 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
92 // '-return' probe regardless of the return path is taken out of the function.
93 // Methods that have multiple return paths use this to avoid having to
94 // instrument each return path. Methods that use CHECK or THROW must use this
95 // since those macros can cause an immedate uninstrumented return.
96 //
97 // In order to get the return value, a reference to the variable containing
98 // the return value must be passed to the contructor of the object, and
99 // the return value must be set before return (since the mark object has
100 // a reference to it).
101 //
102 // Example:
103 // DT_RETURN_MARK_DECL(SomeFunc, int);
104 // JNI_ENTRY(int, SomeFunc, ...)
105 // int return_value = 0;
106 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
107 // foo(CHECK_0)
108 // return_value = 5;
109 // return return_value;
110 // JNI_END
111 #define DT_RETURN_MARK_DECL(name, type, probe) \
112 DTRACE_ONLY( \
113 class DTraceReturnProbeMark_##name { \
114 public: \
115 const type& _ret_ref; \
116 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
117 ~DTraceReturnProbeMark_##name() { \
118 probe; \
119 } \
120 } \
121 )
122 // Void functions are simpler since there's no return value
123 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
124 DTRACE_ONLY( \
125 class DTraceReturnProbeMark_##name { \
126 public: \
127 ~DTraceReturnProbeMark_##name() { \
128 probe; \
129 } \
130 } \
131 )
132
133 // Place these macros in the function to mark the return. Non-void
134 // functions need the type and address of the return value.
135 #define DT_RETURN_MARK(name, type, ref) \
136 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
137 #define DT_VOID_RETURN_MARK(name) \
138 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
139
140
141 // Use these to select distinct code for floating-point vs. non-floating point
142 // situations. Used from within common macros where we need slightly
143 // different behavior for Float/Double
144 #define FP_SELECT_Boolean(intcode, fpcode) intcode
145 #define FP_SELECT_Byte(intcode, fpcode) intcode
146 #define FP_SELECT_Char(intcode, fpcode) intcode
147 #define FP_SELECT_Short(intcode, fpcode) intcode
148 #define FP_SELECT_Object(intcode, fpcode) intcode
149 #define FP_SELECT_Int(intcode, fpcode) intcode
150 #define FP_SELECT_Long(intcode, fpcode) intcode
151 #define FP_SELECT_Float(intcode, fpcode) fpcode
152 #define FP_SELECT_Double(intcode, fpcode) fpcode
153 #define FP_SELECT(TypeName, intcode, fpcode) \
154 FP_SELECT_##TypeName(intcode, fpcode)
155
156 #define COMMA ,
157
158 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
159 // (dtrace doesn't do FP yet)
160 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
161 FP_SELECT(TypeName, \
162 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
163 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
164 FP_SELECT(TypeName, \
165 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
166
167
168 // out-of-line helpers for class jfieldIDWorkaround:
169
170 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
171 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
172 uintptr_t as_uint = (uintptr_t) id;
173 intptr_t offset = raw_instance_offset(id);
174 if (is_checked_jfieldID(id)) {
175 if (!klass_hash_ok(k, id)) {
176 return false;
177 }
178 }
179 return InstanceKlass::cast(k)->contains_field_offset(offset);
180 } else {
181 JNIid* result = (JNIid*) id;
182 #ifdef ASSERT
183 return result != NULL && result->is_static_field_id();
184 #else
185 return result != NULL;
186 #endif
187 }
188 }
189
190
191 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
192 if (offset <= small_offset_mask) {
193 Klass* field_klass = k;
194 Klass* super_klass = field_klass->super();
195 // With compressed oops the most super class with nonstatic fields would
196 // be the owner of fields embedded in the header.
197 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
198 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
199 field_klass = super_klass; // super contains the field also
200 super_klass = field_klass->super();
201 }
202 debug_only(No_Safepoint_Verifier nosafepoint;)
203 uintptr_t klass_hash = field_klass->identity_hash();
204 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
205 } else {
206 #if 0
207 #ifndef PRODUCT
208 {
209 ResourceMark rm;
210 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
211 }
212 #endif
213 #endif
214 return 0;
215 }
216 }
217
218 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
219 uintptr_t as_uint = (uintptr_t) id;
220 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
221 do {
222 debug_only(No_Safepoint_Verifier nosafepoint;)
223 // Could use a non-blocking query for identity_hash here...
224 if ((k->identity_hash() & klass_mask) == klass_hash)
225 return true;
226 k = k->super();
227 } while (k != NULL);
228 return false;
229 }
230
231 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
232 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
233 uintptr_t as_uint = (uintptr_t) id;
234 intptr_t offset = raw_instance_offset(id);
235 if (VerifyJNIFields) {
236 if (is_checked_jfieldID(id)) {
237 guarantee(klass_hash_ok(k, id),
238 "Bug in native code: jfieldID class must match object");
239 } else {
240 #if 0
241 #ifndef PRODUCT
242 if (Verbose) {
243 ResourceMark rm;
244 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
245 }
246 #endif
247 #endif
248 }
249 }
250 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
251 "Bug in native code: jfieldID offset must address interior of object");
252 }
253
254 // Wrapper to trace JNI functions
255
256 #ifdef ASSERT
257 Histogram* JNIHistogram;
258 static volatile jint JNIHistogram_lock = 0;
259
260 class JNITraceWrapper : public StackObj {
261 public:
262 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
263 if (TraceJNICalls) {
264 va_list ap;
265 va_start(ap, format);
266 tty->print("JNI ");
267 tty->vprint_cr(format, ap);
268 va_end(ap);
269 }
270 }
271 };
272
273 class JNIHistogramElement : public HistogramElement {
274 public:
275 JNIHistogramElement(const char* name);
276 };
277
278 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
279 _name = elementName;
280 uintx count = 0;
281
282 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
283 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
284 count +=1;
285 if ( (WarnOnStalledSpinLock > 0)
286 && (count % WarnOnStalledSpinLock == 0)) {
287 warning("JNIHistogram_lock seems to be stalled");
288 }
289 }
290 }
291
292
293 if(JNIHistogram == NULL)
294 JNIHistogram = new Histogram("JNI Call Counts",100);
295
296 JNIHistogram->add_element(this);
297 Atomic::dec(&JNIHistogram_lock);
298 }
299
300 #define JNICountWrapper(arg) \
301 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
302 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
303 if (e != NULL) e->increment_count()
304 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
305 #else
306 #define JNIWrapper(arg)
307 #endif
308
309
310 // Implementation of JNI entries
311
312 DT_RETURN_MARK_DECL(DefineClass, jclass
313 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
314
315 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
316 const jbyte *buf, jsize bufLen))
317 JNIWrapper("DefineClass");
318
319 HOTSPOT_JNI_DEFINECLASS_ENTRY(
320 env, (char*) name, loaderRef, (char*) buf, bufLen);
321
322 jclass cls = NULL;
323 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
324
325 TempNewSymbol class_name = NULL;
326 // Since exceptions can be thrown, class initialization can take place
327 // if name is NULL no check for class name in .class stream has to be made.
328 if (name != NULL) {
329 const int str_len = (int)strlen(name);
330 if (str_len > Symbol::max_length()) {
331 // It's impossible to create this class; the name cannot fit
332 // into the constant pool.
333 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
334 }
335 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
336 }
337 ResourceMark rm(THREAD);
338 ClassFileStream st((u1*) buf, bufLen, NULL);
339 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
340
341 if (UsePerfData && !class_loader.is_null()) {
342 Handle class_loader1 (THREAD, oopDesc::bs()->write_barrier(class_loader()));
343 // check whether the current caller thread holds the lock or not.
344 // If not, increment the corresponding counter
345 if (ObjectSynchronizer::
346 query_lock_ownership((JavaThread*)THREAD, class_loader1) !=
347 ObjectSynchronizer::owner_self) {
348 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
349 }
350 }
351 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
352 Handle(), &st, true,
353 CHECK_NULL);
354
355 if (TraceClassResolution && k != NULL) {
356 trace_class_resolution(k);
357 }
358
359 cls = (jclass)JNIHandles::make_local(
360 env, k->java_mirror());
361 return cls;
362 JNI_END
363
364
365
366 static bool first_time_FindClass = true;
367
368 DT_RETURN_MARK_DECL(FindClass, jclass
369 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
370
371 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
372 JNIWrapper("FindClass");
373
374 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
375
376 jclass result = NULL;
377 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
378
379 // Remember if we are the first invocation of jni_FindClass
380 bool first_time = first_time_FindClass;
381 first_time_FindClass = false;
382
383 // Sanity check the name: it cannot be null or larger than the maximum size
384 // name we can fit in the constant pool.
385 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
386 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
387 }
388
389 //%note jni_3
390 Handle loader;
391 Handle protection_domain;
392 // Find calling class
393 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
394 if (k.not_null()) {
395 loader = Handle(THREAD, k->class_loader());
396 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
397 // in the correct class context.
398 if (loader.is_null() &&
399 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
400 JavaValue result(T_OBJECT);
401 JavaCalls::call_static(&result, k,
402 vmSymbols::getFromClass_name(),
403 vmSymbols::void_class_signature(),
404 thread);
405 if (HAS_PENDING_EXCEPTION) {
406 Handle ex(thread, thread->pending_exception());
407 CLEAR_PENDING_EXCEPTION;
408 THROW_HANDLE_0(ex);
409 }
410 oop mirror = (oop) result.get_jobject();
411 loader = Handle(THREAD,
412 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
413 protection_domain = Handle(THREAD,
414 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
415 }
416 } else {
417 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
418 loader = Handle(THREAD, SystemDictionary::java_system_loader());
419 }
420
421 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
422 result = find_class_from_class_loader(env, sym, true, loader,
423 protection_domain, true, thread);
424
425 if (TraceClassResolution && result != NULL) {
426 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
427 }
428
429 // If we were the first invocation of jni_FindClass, we enable compilation again
430 // rather than just allowing invocation counter to overflow and decay.
431 // Controlled by flag DelayCompilationDuringStartup.
432 if (first_time && !CompileTheWorld)
433 CompilationPolicy::completed_vm_startup();
434
435 return result;
436 JNI_END
437
438 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
439 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
440
441 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
442 JNIWrapper("FromReflectedMethod");
443
444 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
445
446 jmethodID ret = NULL;
447 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
448
449 // method is a handle to a java.lang.reflect.Method object
450 oop reflected = JNIHandles::resolve_non_null(method);
451 oop mirror = NULL;
452 int slot = 0;
453
454 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
455 mirror = java_lang_reflect_Constructor::clazz(reflected);
456 slot = java_lang_reflect_Constructor::slot(reflected);
457 } else {
458 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
459 mirror = java_lang_reflect_Method::clazz(reflected);
460 slot = java_lang_reflect_Method::slot(reflected);
461 }
462 Klass* k = java_lang_Class::as_Klass(mirror);
463
464 KlassHandle k1(THREAD, k);
465 // Make sure class is initialized before handing id's out to methods
466 k1()->initialize(CHECK_NULL);
467 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
468 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
469 return ret;
470 JNI_END
471
472 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
473 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
474
475 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
476 JNIWrapper("FromReflectedField");
477
478 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
479
480 jfieldID ret = NULL;
481 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
482
483 // field is a handle to a java.lang.reflect.Field object
484 oop reflected = JNIHandles::resolve_non_null(field);
485 oop mirror = java_lang_reflect_Field::clazz(reflected);
486 Klass* k = java_lang_Class::as_Klass(mirror);
487 int slot = java_lang_reflect_Field::slot(reflected);
488 int modifiers = java_lang_reflect_Field::modifiers(reflected);
489
490 KlassHandle k1(THREAD, k);
491 // Make sure class is initialized before handing id's out to fields
492 k1()->initialize(CHECK_NULL);
493
494 // First check if this is a static field
495 if (modifiers & JVM_ACC_STATIC) {
496 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
497 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
498 assert(id != NULL, "corrupt Field object");
499 debug_only(id->set_is_static_field_id();)
500 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
501 ret = jfieldIDWorkaround::to_static_jfieldID(id);
502 return ret;
503 }
504
505 // The slot is the index of the field description in the field-array
506 // The jfieldID is the offset of the field within the object
507 // It may also have hash bits for k, if VerifyJNIFields is turned on.
508 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
509 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
510 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
511 return ret;
512 JNI_END
513
514
515 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
516 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
517
518 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
519 JNIWrapper("ToReflectedMethod");
520
521 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
522
523 jobject ret = NULL;
524 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
525
526 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
527 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
528 oop reflection_method;
529 if (m->is_initializer()) {
530 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
531 } else {
532 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
533 }
534 ret = JNIHandles::make_local(env, reflection_method);
535 return ret;
536 JNI_END
537
538 DT_RETURN_MARK_DECL(GetSuperclass, jclass
539 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
540
541 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
542 JNIWrapper("GetSuperclass");
543
544 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
545
546 jclass obj = NULL;
547 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
548
549 oop mirror = JNIHandles::resolve_non_null(sub);
550 // primitive classes return NULL
551 if (java_lang_Class::is_primitive(mirror)) return NULL;
552
553 // Rules of Class.getSuperClass as implemented by KLass::java_super:
554 // arrays return Object
555 // interfaces return NULL
556 // proper classes return Klass::super()
557 Klass* k = java_lang_Class::as_Klass(mirror);
558 if (k->is_interface()) return NULL;
559
560 // return mirror for superclass
561 Klass* super = k->java_super();
562 // super2 is the value computed by the compiler's getSuperClass intrinsic:
563 debug_only(Klass* super2 = ( k->oop_is_array()
564 ? SystemDictionary::Object_klass()
565 : k->super() ) );
566 assert(super == super2,
567 "java_super computation depends on interface, array, other super");
568 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
569 return obj;
570 JNI_END
571
572 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
573 JNIWrapper("IsSubclassOf");
574
575 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
576
577 oop sub_mirror = JNIHandles::resolve_non_null(sub);
578 oop super_mirror = JNIHandles::resolve_non_null(super);
579 if (java_lang_Class::is_primitive(sub_mirror) ||
580 java_lang_Class::is_primitive(super_mirror)) {
581 jboolean ret = (sub_mirror == super_mirror);
582 if (UseShenandoahGC && ret == JNI_FALSE) {
583 sub_mirror = oopDesc::bs()->read_barrier(sub_mirror);
584 super_mirror = oopDesc::bs()->read_barrier(super_mirror);
585 ret = (sub_mirror == super_mirror);
586 }
587 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
588 return ret;
589 }
590 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
591 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
592 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
593 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
594 JNI_TRUE : JNI_FALSE;
595
596 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
597 return ret;
598 JNI_END
599
600
601 DT_RETURN_MARK_DECL(Throw, jint
602 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
603
604 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
605 JNIWrapper("Throw");
606
607 HOTSPOT_JNI_THROW_ENTRY(env, obj);
608
609 jint ret = JNI_OK;
610 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
611
612 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
613 ShouldNotReachHere();
614 return 0; // Mute compiler.
615 JNI_END
616
617
618 DT_RETURN_MARK_DECL(ThrowNew, jint
619 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
620
621 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
622 JNIWrapper("ThrowNew");
623
624 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
625
626 jint ret = JNI_OK;
627 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
628
629 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
630 Symbol* name = k->name();
631 Handle class_loader (THREAD, k->class_loader());
632 Handle protection_domain (THREAD, k->protection_domain());
633 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
634 ShouldNotReachHere();
635 return 0; // Mute compiler.
636 JNI_END
637
638
639 // JNI functions only transform a pending async exception to a synchronous
640 // exception in ExceptionOccurred and ExceptionCheck calls, since
641 // delivering an async exception in other places won't change the native
642 // code's control flow and would be harmful when native code further calls
643 // JNI functions with a pending exception. Async exception is also checked
644 // during the call, so ExceptionOccurred/ExceptionCheck won't return
645 // false but deliver the async exception at the very end during
646 // state transition.
647
648 static void jni_check_async_exceptions(JavaThread *thread) {
649 assert(thread == Thread::current(), "must be itself");
650 thread->check_and_handle_async_exceptions();
651 }
652
653 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
654 JNIWrapper("ExceptionOccurred");
655
656 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
657
658 jni_check_async_exceptions(thread);
659 oop exception = thread->pending_exception();
660 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
661
662 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
663 return ret;
664 JNI_END
665
666
667 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
668 JNIWrapper("ExceptionDescribe");
669
670 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
671
672 if (thread->has_pending_exception()) {
673 Handle ex(thread, thread->pending_exception());
674 thread->clear_pending_exception();
675 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
676 // Don't print anything if we are being killed.
677 } else {
678 jio_fprintf(defaultStream::error_stream(), "Exception ");
679 if (thread != NULL && thread->threadObj() != NULL) {
680 ResourceMark rm(THREAD);
681 jio_fprintf(defaultStream::error_stream(),
682 "in thread \"%s\" ", thread->get_thread_name());
683 }
684 if (ex->is_a(SystemDictionary::Throwable_klass())) {
685 JavaValue result(T_VOID);
686 JavaCalls::call_virtual(&result,
687 ex,
688 KlassHandle(THREAD,
689 SystemDictionary::Throwable_klass()),
690 vmSymbols::printStackTrace_name(),
691 vmSymbols::void_method_signature(),
692 THREAD);
693 // If an exception is thrown in the call it gets thrown away. Not much
694 // we can do with it. The native code that calls this, does not check
695 // for the exception - hence, it might still be in the thread when DestroyVM gets
696 // called, potentially causing a few asserts to trigger - since no pending exception
697 // is expected.
698 CLEAR_PENDING_EXCEPTION;
699 } else {
700 ResourceMark rm(THREAD);
701 jio_fprintf(defaultStream::error_stream(),
702 ". Uncaught exception of type %s.",
703 ex->klass()->external_name());
704 }
705 }
706 }
707
708 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
709 JNI_END
710
711
712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
713 JNIWrapper("ExceptionClear");
714
715 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
716
717 // The jni code might be using this API to clear java thrown exception.
718 // So just mark jvmti thread exception state as exception caught.
719 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
720 if (state != NULL && state->is_exception_detected()) {
721 state->set_exception_caught();
722 }
723 thread->clear_pending_exception();
724
725 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
726 JNI_END
727
728
729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
730 JNIWrapper("FatalError");
731
732 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
733
734 tty->print_cr("FATAL ERROR in native method: %s", msg);
735 thread->print_stack();
736 os::abort(); // Dump core and abort
737 JNI_END
738
739
740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
741 JNIWrapper("PushLocalFrame");
742
743 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
744
745 //%note jni_11
746 if (capacity < 0 ||
747 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
748 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
749 return JNI_ERR;
750 }
751 JNIHandleBlock* old_handles = thread->active_handles();
752 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
753 assert(new_handles != NULL, "should not be NULL");
754 new_handles->set_pop_frame_link(old_handles);
755 thread->set_active_handles(new_handles);
756 jint ret = JNI_OK;
757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
758 return ret;
759 JNI_END
760
761
762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
763 JNIWrapper("PopLocalFrame");
764
765 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
766
767 //%note jni_11
768 Handle result_handle(thread, JNIHandles::resolve(result));
769 JNIHandleBlock* old_handles = thread->active_handles();
770 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
771 if (new_handles != NULL) {
772 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
773 // This way code will still work if PopLocalFrame is called without a corresponding
774 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
775 // the release_block call will release the blocks.
776 thread->set_active_handles(new_handles);
777 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
778 JNIHandleBlock::release_block(old_handles, thread); // may block
779 result = JNIHandles::make_local(thread, result_handle());
780 }
781 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
782 return result;
783 JNI_END
784
785
786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
787 JNIWrapper("NewGlobalRef");
788
789 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
790
791 Handle ref_handle(thread, JNIHandles::resolve(ref));
792 jobject ret = JNIHandles::make_global(ref_handle);
793
794 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
795 return ret;
796 JNI_END
797
798 // Must be JNI_ENTRY (with HandleMark)
799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
800 JNIWrapper("DeleteGlobalRef");
801
802 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
803
804 JNIHandles::destroy_global(ref);
805
806 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
807 JNI_END
808
809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
810 JNIWrapper("DeleteLocalRef");
811
812 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
813
814 JNIHandles::destroy_local(obj);
815
816 HOTSPOT_JNI_DELETELOCALREF_RETURN();
817 JNI_END
818
819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
820 JNIWrapper("IsSameObject");
821
822 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
823
824 oop a = JNIHandles::resolve(r1);
825 oop b = JNIHandles::resolve(r2);
826 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
827
828 if (UseShenandoahGC && ret == JNI_FALSE) {
829 a = oopDesc::bs()->read_barrier(a);
830 b = oopDesc::bs()->read_barrier(b);
831 ret = (a == b) ? JNI_TRUE : JNI_FALSE;
832 }
833 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
834 return ret;
835 JNI_END
836
837
838 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
839 JNIWrapper("NewLocalRef");
840
841 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
842
843 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
844
845 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
846 return ret;
847 JNI_END
848
849 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
850 JNIWrapper("EnsureLocalCapacity");
851
852 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
853
854 jint ret;
855 if (capacity >= 0 &&
856 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
857 ret = JNI_OK;
858 } else {
859 ret = JNI_ERR;
860 }
861
862 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
863 return ret;
864 JNI_END
865
866 // Return the Handle Type
867 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
868 JNIWrapper("GetObjectRefType");
869
870 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
871
872 jobjectRefType ret;
873 if (JNIHandles::is_local_handle(thread, obj) ||
874 JNIHandles::is_frame_handle(thread, obj))
875 ret = JNILocalRefType;
876 else if (JNIHandles::is_global_handle(obj))
877 ret = JNIGlobalRefType;
878 else if (JNIHandles::is_weak_global_handle(obj))
879 ret = JNIWeakGlobalRefType;
880 else
881 ret = JNIInvalidRefType;
882
883 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
884 return ret;
885 JNI_END
886
887
888 class JNI_ArgumentPusher : public SignatureIterator {
889 protected:
890 JavaCallArguments* _arguments;
891
892 virtual void get_bool () = 0;
893 virtual void get_char () = 0;
894 virtual void get_short () = 0;
895 virtual void get_byte () = 0;
896 virtual void get_int () = 0;
897 virtual void get_long () = 0;
898 virtual void get_float () = 0;
899 virtual void get_double () = 0;
900 virtual void get_object () = 0;
901
902 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
903 this->_return_type = T_ILLEGAL;
904 _arguments = NULL;
905 }
906
907 public:
908 virtual void iterate( uint64_t fingerprint ) = 0;
909
910 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
911
912 inline void do_bool() { if (!is_return_type()) get_bool(); }
913 inline void do_char() { if (!is_return_type()) get_char(); }
914 inline void do_short() { if (!is_return_type()) get_short(); }
915 inline void do_byte() { if (!is_return_type()) get_byte(); }
916 inline void do_int() { if (!is_return_type()) get_int(); }
917 inline void do_long() { if (!is_return_type()) get_long(); }
918 inline void do_float() { if (!is_return_type()) get_float(); }
919 inline void do_double() { if (!is_return_type()) get_double(); }
920 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
921 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
922 inline void do_void() { }
923
924 JavaCallArguments* arguments() { return _arguments; }
925 void push_receiver(Handle h) { _arguments->push_oop(h); }
926 };
927
928
929 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
930 protected:
931 va_list _ap;
932
933 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
934 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
935 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
936 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
937 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
938
939 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
940
941 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
942 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
943 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
944 inline void get_object() { jobject l = va_arg(_ap, jobject);
945 _arguments->push_oop(Handle((oop *)l, false)); }
946
947 inline void set_ap(va_list rap) {
948 #ifdef va_copy
949 va_copy(_ap, rap);
950 #elif defined (__va_copy)
951 __va_copy(_ap, rap);
952 #else
953 _ap = rap;
954 #endif
955 }
956
957 public:
958 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
959 : JNI_ArgumentPusher(signature) {
960 set_ap(rap);
961 }
962 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
963 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
964 set_ap(rap);
965 }
966
967 // Optimized path if we have the bitvector form of signature
968 void iterate( uint64_t fingerprint ) {
969 if (fingerprint == (uint64_t)CONST64(-1)) {
970 SignatureIterator::iterate(); // Must be too many arguments
971 } else {
972 _return_type = (BasicType)((fingerprint >> static_feature_size) &
973 result_feature_mask);
974
975 assert(fingerprint, "Fingerprint should not be 0");
976 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
977 while ( 1 ) {
978 switch ( fingerprint & parameter_feature_mask ) {
979 case bool_parm:
980 case char_parm:
981 case short_parm:
982 case byte_parm:
983 case int_parm:
984 get_int();
985 break;
986 case obj_parm:
987 get_object();
988 break;
989 case long_parm:
990 get_long();
991 break;
992 case float_parm:
993 get_float();
994 break;
995 case double_parm:
996 get_double();
997 break;
998 case done_parm:
999 return;
1000 break;
1001 default:
1002 ShouldNotReachHere();
1003 break;
1004 }
1005 fingerprint >>= parameter_feature_size;
1006 }
1007 }
1008 }
1009 };
1010
1011
1012 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1013 protected:
1014 const jvalue *_ap;
1015
1016 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1017 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1018 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1019 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1020 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1021
1022 inline void get_long() { _arguments->push_long((_ap++)->j); }
1023 inline void get_float() { _arguments->push_float((_ap++)->f); }
1024 inline void get_double() { _arguments->push_double((_ap++)->d);}
1025 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1026
1027 inline void set_ap(const jvalue *rap) { _ap = rap; }
1028
1029 public:
1030 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1031 : JNI_ArgumentPusher(signature) {
1032 set_ap(rap);
1033 }
1034 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1035 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1036 set_ap(rap);
1037 }
1038
1039 // Optimized path if we have the bitvector form of signature
1040 void iterate( uint64_t fingerprint ) {
1041 if (fingerprint == (uint64_t)CONST64(-1)) {
1042 SignatureIterator::iterate(); // Must be too many arguments
1043 } else {
1044 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1045 result_feature_mask);
1046 assert(fingerprint, "Fingerprint should not be 0");
1047 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1048 while ( 1 ) {
1049 switch ( fingerprint & parameter_feature_mask ) {
1050 case bool_parm:
1051 get_bool();
1052 break;
1053 case char_parm:
1054 get_char();
1055 break;
1056 case short_parm:
1057 get_short();
1058 break;
1059 case byte_parm:
1060 get_byte();
1061 break;
1062 case int_parm:
1063 get_int();
1064 break;
1065 case obj_parm:
1066 get_object();
1067 break;
1068 case long_parm:
1069 get_long();
1070 break;
1071 case float_parm:
1072 get_float();
1073 break;
1074 case double_parm:
1075 get_double();
1076 break;
1077 case done_parm:
1078 return;
1079 break;
1080 default:
1081 ShouldNotReachHere();
1082 break;
1083 }
1084 fingerprint >>= parameter_feature_size;
1085 }
1086 }
1087 }
1088 };
1089
1090
1091 enum JNICallType {
1092 JNI_STATIC,
1093 JNI_VIRTUAL,
1094 JNI_NONVIRTUAL
1095 };
1096
1097
1098
1099 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1100 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1101
1102 // Create object to hold arguments for the JavaCall, and associate it with
1103 // the jni parser
1104 ResourceMark rm(THREAD);
1105 int number_of_parameters = method->size_of_parameters();
1106 JavaCallArguments java_args(number_of_parameters);
1107 args->set_java_argument_object(&java_args);
1108
1109 assert(method->is_static(), "method should be static");
1110
1111 // Fill out JavaCallArguments object
1112 args->iterate( Fingerprinter(method).fingerprint() );
1113 // Initialize result type
1114 result->set_type(args->get_ret_type());
1115
1116 // Invoke the method. Result is returned as oop.
1117 JavaCalls::call(result, method, &java_args, CHECK);
1118
1119 // Convert result
1120 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1121 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1122 }
1123 }
1124
1125
1126 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1127 oop recv = JNIHandles::resolve(receiver);
1128 if (recv == NULL) {
1129 THROW(vmSymbols::java_lang_NullPointerException());
1130 }
1131 Handle h_recv(THREAD, recv);
1132
1133 int number_of_parameters;
1134 Method* selected_method;
1135 {
1136 Method* m = Method::resolve_jmethod_id(method_id);
1137 number_of_parameters = m->size_of_parameters();
1138 Klass* holder = m->method_holder();
1139 if (call_type != JNI_VIRTUAL) {
1140 selected_method = m;
1141 } else if (!m->has_itable_index()) {
1142 // non-interface call -- for that little speed boost, don't handlize
1143 debug_only(No_Safepoint_Verifier nosafepoint;)
1144 // jni_GetMethodID makes sure class is linked and initialized
1145 // so m should have a valid vtable index.
1146 assert(m->valid_vtable_index(), "no valid vtable index");
1147 int vtbl_index = m->vtable_index();
1148 if (vtbl_index != Method::nonvirtual_vtable_index) {
1149 Klass* k = h_recv->klass();
1150 // k might be an arrayKlassOop but all vtables start at
1151 // the same place. The cast is to avoid virtual call and assertion.
1152 InstanceKlass *ik = (InstanceKlass*)k;
1153 selected_method = ik->method_at_vtable(vtbl_index);
1154 } else {
1155 // final method
1156 selected_method = m;
1157 }
1158 } else {
1159 // interface call
1160 KlassHandle h_holder(THREAD, holder);
1161
1162 int itbl_index = m->itable_index();
1163 Klass* k = h_recv->klass();
1164 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1165 }
1166 }
1167
1168 methodHandle method(THREAD, selected_method);
1169
1170 // Create object to hold arguments for the JavaCall, and associate it with
1171 // the jni parser
1172 ResourceMark rm(THREAD);
1173 JavaCallArguments java_args(number_of_parameters);
1174 args->set_java_argument_object(&java_args);
1175
1176 // handle arguments
1177 assert(!method->is_static(), "method should not be static");
1178 args->push_receiver(h_recv); // Push jobject handle
1179
1180 // Fill out JavaCallArguments object
1181 args->iterate( Fingerprinter(method).fingerprint() );
1182 // Initialize result type
1183 result->set_type(args->get_ret_type());
1184
1185 // Invoke the method. Result is returned as oop.
1186 JavaCalls::call(result, method, &java_args, CHECK);
1187
1188 // Convert result
1189 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1190 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1191 }
1192 }
1193
1194
1195 static instanceOop alloc_object(jclass clazz, TRAPS) {
1196 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1197 if (k == NULL) {
1198 ResourceMark rm(THREAD);
1199 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1200 }
1201 k()->check_valid_for_instantiation(false, CHECK_NULL);
1202 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1203 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1204 return ih;
1205 }
1206
1207 DT_RETURN_MARK_DECL(AllocObject, jobject
1208 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1209
1210 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1211 JNIWrapper("AllocObject");
1212
1213 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1214
1215 jobject ret = NULL;
1216 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1217
1218 instanceOop i = alloc_object(clazz, CHECK_NULL);
1219 ret = JNIHandles::make_local(env, i);
1220 return ret;
1221 JNI_END
1222
1223 DT_RETURN_MARK_DECL(NewObjectA, jobject
1224 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1225
1226 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1227 JNIWrapper("NewObjectA");
1228
1229 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1230
1231 jobject obj = NULL;
1232 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1233
1234 instanceOop i = alloc_object(clazz, CHECK_NULL);
1235 obj = JNIHandles::make_local(env, i);
1236 JavaValue jvalue(T_VOID);
1237 JNI_ArgumentPusherArray ap(methodID, args);
1238 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1239 return obj;
1240 JNI_END
1241
1242
1243 DT_RETURN_MARK_DECL(NewObjectV, jobject
1244 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1245
1246 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1247 JNIWrapper("NewObjectV");
1248
1249 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1250
1251 jobject obj = NULL;
1252 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1253
1254 instanceOop i = alloc_object(clazz, CHECK_NULL);
1255 obj = JNIHandles::make_local(env, i);
1256 JavaValue jvalue(T_VOID);
1257 JNI_ArgumentPusherVaArg ap(methodID, args);
1258 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1259 return obj;
1260 JNI_END
1261
1262
1263 DT_RETURN_MARK_DECL(NewObject, jobject
1264 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1265
1266 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1267 JNIWrapper("NewObject");
1268
1269 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1270
1271 jobject obj = NULL;
1272 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1273
1274 instanceOop i = alloc_object(clazz, CHECK_NULL);
1275 obj = JNIHandles::make_local(env, i);
1276 va_list args;
1277 va_start(args, methodID);
1278 JavaValue jvalue(T_VOID);
1279 JNI_ArgumentPusherVaArg ap(methodID, args);
1280 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1281 va_end(args);
1282 return obj;
1283 JNI_END
1284
1285
1286 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1287 JNIWrapper("GetObjectClass");
1288
1289 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1290
1291 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1292 jclass ret =
1293 (jclass) JNIHandles::make_local(env, k->java_mirror());
1294
1295 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1296 return ret;
1297 JNI_END
1298
1299 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1300 JNIWrapper("IsInstanceOf");
1301
1302 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1303
1304 jboolean ret = JNI_TRUE;
1305 if (obj != NULL) {
1306 ret = JNI_FALSE;
1307 Klass* k = java_lang_Class::as_Klass(
1308 JNIHandles::resolve_non_null(clazz));
1309 if (k != NULL) {
1310 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1311 }
1312 }
1313
1314 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1315 return ret;
1316 JNI_END
1317
1318
1319 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1320 const char *sig, bool is_static, TRAPS) {
1321 // %%%% This code should probably just call into a method in the LinkResolver
1322 //
1323 // The class should have been loaded (we have an instance of the class
1324 // passed in) so the method and signature should already be in the symbol
1325 // table. If they're not there, the method doesn't exist.
1326 const char *name_to_probe = (name_str == NULL)
1327 ? vmSymbols::object_initializer_name()->as_C_string()
1328 : name_str;
1329 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1330 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1331
1332 if (name == NULL || signature == NULL) {
1333 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1334 }
1335
1336 // Throw a NoSuchMethodError exception if we have an instance of a
1337 // primitive java.lang.Class
1338 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1339 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1340 }
1341
1342 KlassHandle klass(THREAD,
1343 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1344
1345 // Make sure class is linked and initialized before handing id's out to
1346 // Method*s.
1347 klass()->initialize(CHECK_NULL);
1348
1349 Method* m;
1350 if (name == vmSymbols::object_initializer_name() ||
1351 name == vmSymbols::class_initializer_name()) {
1352 // Never search superclasses for constructors
1353 if (klass->oop_is_instance()) {
1354 m = InstanceKlass::cast(klass())->find_method(name, signature);
1355 } else {
1356 m = NULL;
1357 }
1358 } else {
1359 m = klass->lookup_method(name, signature);
1360 if (m == NULL && klass->oop_is_instance()) {
1361 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1362 }
1363 }
1364 if (m == NULL || (m->is_static() != is_static)) {
1365 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1366 }
1367 return m->jmethod_id();
1368 }
1369
1370
1371 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1372 const char *name, const char *sig))
1373 JNIWrapper("GetMethodID");
1374 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1375 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1376 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1377 return ret;
1378 JNI_END
1379
1380
1381 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1382 const char *name, const char *sig))
1383 JNIWrapper("GetStaticMethodID");
1384 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1385 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1386 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1387 return ret;
1388 JNI_END
1389
1390
1391
1392 //
1393 // Calling Methods
1394 //
1395
1396
1397 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1398 , EntryProbe, ReturnProbe) \
1399 \
1400 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1401 , ReturnProbe); \
1402 \
1403 JNI_ENTRY(ResultType, \
1404 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1405 JNIWrapper("Call" XSTR(Result) "Method"); \
1406 \
1407 EntryProbe; \
1408 ResultType ret = 0;\
1409 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1410 (const ResultType&)ret);\
1411 \
1412 va_list args; \
1413 va_start(args, methodID); \
1414 JavaValue jvalue(Tag); \
1415 JNI_ArgumentPusherVaArg ap(methodID, args); \
1416 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1417 va_end(args); \
1418 ret = jvalue.get_##ResultType(); \
1419 return ret;\
1420 JNI_END
1421
1422 // the runtime type of subword integral basic types is integer
1423 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1424 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1426 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1427 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1428 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1429 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1430 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1431 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1432 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1433 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1435
1436 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1437 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1438 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1439 DEFINE_CALLMETHOD(jint, Int, T_INT,
1440 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1441 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1442 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1443 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1445 // Float and double probes don't return value because dtrace doesn't currently support it
1446 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1447 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1448 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1449 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1450 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1451 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1452
1453 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1454 , EntryProbe, ReturnProbe) \
1455 \
1456 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1457 , ReturnProbe); \
1458 \
1459 JNI_ENTRY(ResultType, \
1460 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1461 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1462 \
1463 EntryProbe;\
1464 ResultType ret = 0;\
1465 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1466 (const ResultType&)ret);\
1467 \
1468 JavaValue jvalue(Tag); \
1469 JNI_ArgumentPusherVaArg ap(methodID, args); \
1470 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1471 ret = jvalue.get_##ResultType(); \
1472 return ret;\
1473 JNI_END
1474
1475 // the runtime type of subword integral basic types is integer
1476 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1477 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1479 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1480 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1481 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1482 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1483 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1484 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1485 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1486 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1488
1489 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1490 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1491 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1492 DEFINE_CALLMETHODV(jint, Int, T_INT,
1493 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1494 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1495 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1496 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1498 // Float and double probes don't return value because dtrace doesn't currently support it
1499 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1500 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1501 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1502 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1503 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1504 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1505
1506 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1507 , EntryProbe, ReturnProbe) \
1508 \
1509 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1510 , ReturnProbe); \
1511 \
1512 JNI_ENTRY(ResultType, \
1513 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1514 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1515 EntryProbe; \
1516 ResultType ret = 0;\
1517 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1518 (const ResultType&)ret);\
1519 \
1520 JavaValue jvalue(Tag); \
1521 JNI_ArgumentPusherArray ap(methodID, args); \
1522 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1523 ret = jvalue.get_##ResultType(); \
1524 return ret;\
1525 JNI_END
1526
1527 // the runtime type of subword integral basic types is integer
1528 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1529 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1531 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1532 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1533 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1534 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1535 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1536 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1537 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1538 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1540
1541 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1542 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1543 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1544 DEFINE_CALLMETHODA(jint, Int, T_INT,
1545 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1546 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1547 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1548 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1550 // Float and double probes don't return value because dtrace doesn't currently support it
1551 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1552 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1553 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1554 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1555 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1556 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1557
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1560 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1561
1562
1563 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1564 JNIWrapper("CallVoidMethod");
1565 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1566 DT_VOID_RETURN_MARK(CallVoidMethod);
1567
1568 va_list args;
1569 va_start(args, methodID);
1570 JavaValue jvalue(T_VOID);
1571 JNI_ArgumentPusherVaArg ap(methodID, args);
1572 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1573 va_end(args);
1574 JNI_END
1575
1576
1577 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1578 JNIWrapper("CallVoidMethodV");
1579 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1580 DT_VOID_RETURN_MARK(CallVoidMethodV);
1581
1582 JavaValue jvalue(T_VOID);
1583 JNI_ArgumentPusherVaArg ap(methodID, args);
1584 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1585 JNI_END
1586
1587
1588 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1589 JNIWrapper("CallVoidMethodA");
1590 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1591 DT_VOID_RETURN_MARK(CallVoidMethodA);
1592
1593 JavaValue jvalue(T_VOID);
1594 JNI_ArgumentPusherArray ap(methodID, args);
1595 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1596 JNI_END
1597
1598
1599
1600 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1601 , EntryProbe, ReturnProbe) \
1602 \
1603 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1604 , ReturnProbe);\
1605 \
1606 JNI_ENTRY(ResultType, \
1607 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1608 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1609 \
1610 EntryProbe;\
1611 ResultType ret;\
1612 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1613 (const ResultType&)ret);\
1614 \
1615 va_list args; \
1616 va_start(args, methodID); \
1617 JavaValue jvalue(Tag); \
1618 JNI_ArgumentPusherVaArg ap(methodID, args); \
1619 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1620 va_end(args); \
1621 ret = jvalue.get_##ResultType(); \
1622 return ret;\
1623 JNI_END
1624
1625 // the runtime type of subword integral basic types is integer
1626 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1627 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1629 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1630 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1631 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1632 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1633 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1634 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1635 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1636 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1638
1639 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1640 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1641 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1642 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1643 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1644 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1645 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1646 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647 // Float and double probes don't return value because dtrace doesn't currently support it
1648 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1649 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1650 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1651 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1652 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1653 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1654 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1655
1656 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1657 , EntryProbe, ReturnProbe) \
1658 \
1659 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1660 , ReturnProbe);\
1661 \
1662 JNI_ENTRY(ResultType, \
1663 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1664 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1665 \
1666 EntryProbe;\
1667 ResultType ret;\
1668 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1669 (const ResultType&)ret);\
1670 \
1671 JavaValue jvalue(Tag); \
1672 JNI_ArgumentPusherVaArg ap(methodID, args); \
1673 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1674 ret = jvalue.get_##ResultType(); \
1675 return ret;\
1676 JNI_END
1677
1678 // the runtime type of subword integral basic types is integer
1679 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1680 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1682 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1683 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1684 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1685 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1686 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1687 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1688 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1689 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1691
1692 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1693 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1694 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1695 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1696 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1697 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1698 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1699 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700 // Float and double probes don't return value because dtrace doesn't currently support it
1701 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1702 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1703 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1704 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1705 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1706 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1707 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1708
1709 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1710 , EntryProbe, ReturnProbe) \
1711 \
1712 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1713 , ReturnProbe);\
1714 \
1715 JNI_ENTRY(ResultType, \
1716 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1717 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1718 \
1719 EntryProbe;\
1720 ResultType ret;\
1721 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1722 (const ResultType&)ret);\
1723 \
1724 JavaValue jvalue(Tag); \
1725 JNI_ArgumentPusherArray ap(methodID, args); \
1726 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1727 ret = jvalue.get_##ResultType(); \
1728 return ret;\
1729 JNI_END
1730
1731 // the runtime type of subword integral basic types is integer
1732 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1733 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1735 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1736 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1737 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1738 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1739 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1740 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1741 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1742 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1744
1745 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1746 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1747 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1748 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1749 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1750 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1751 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1752 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753 // Float and double probes don't return value because dtrace doesn't currently support it
1754 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1755 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1756 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1757 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1758 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1759 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1760 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1761
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1764 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1765 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1766 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1767 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1768
1769 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1770 JNIWrapper("CallNonvirtualVoidMethod");
1771
1772 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1773 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1774
1775 va_list args;
1776 va_start(args, methodID);
1777 JavaValue jvalue(T_VOID);
1778 JNI_ArgumentPusherVaArg ap(methodID, args);
1779 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1780 va_end(args);
1781 JNI_END
1782
1783
1784 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1785 JNIWrapper("CallNonvirtualVoidMethodV");
1786
1787 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1788 env, obj, cls, (uintptr_t) methodID);
1789 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1790
1791 JavaValue jvalue(T_VOID);
1792 JNI_ArgumentPusherVaArg ap(methodID, args);
1793 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1794 JNI_END
1795
1796
1797 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1798 JNIWrapper("CallNonvirtualVoidMethodA");
1799 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1800 env, obj, cls, (uintptr_t) methodID);
1801 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1802 JavaValue jvalue(T_VOID);
1803 JNI_ArgumentPusherArray ap(methodID, args);
1804 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1805 JNI_END
1806
1807
1808
1809 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1810 , EntryProbe, ResultProbe) \
1811 \
1812 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1813 , ResultProbe); \
1814 \
1815 JNI_ENTRY(ResultType, \
1816 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1817 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1818 \
1819 EntryProbe; \
1820 ResultType ret = 0;\
1821 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1822 (const ResultType&)ret);\
1823 \
1824 va_list args; \
1825 va_start(args, methodID); \
1826 JavaValue jvalue(Tag); \
1827 JNI_ArgumentPusherVaArg ap(methodID, args); \
1828 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1829 va_end(args); \
1830 ret = jvalue.get_##ResultType(); \
1831 return ret;\
1832 JNI_END
1833
1834 // the runtime type of subword integral basic types is integer
1835 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1836 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1838 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1839 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1840 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1841 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1842 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1843 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1844 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1845 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1847
1848 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1849 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1850 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1851 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1852 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1853 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1854 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1855 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1857 // Float and double probes don't return value because dtrace doesn't currently support it
1858 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1859 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1860 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1861 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1862 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1863 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1864
1865 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1866 , EntryProbe, ResultProbe) \
1867 \
1868 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1869 , ResultProbe); \
1870 \
1871 JNI_ENTRY(ResultType, \
1872 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1873 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1874 \
1875 EntryProbe; \
1876 ResultType ret = 0;\
1877 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1878 (const ResultType&)ret);\
1879 \
1880 JavaValue jvalue(Tag); \
1881 JNI_ArgumentPusherVaArg ap(methodID, args); \
1882 /* Make sure class is initialized before trying to invoke its method */ \
1883 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1884 k()->initialize(CHECK_0); \
1885 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1886 va_end(args); \
1887 ret = jvalue.get_##ResultType(); \
1888 return ret;\
1889 JNI_END
1890
1891 // the runtime type of subword integral basic types is integer
1892 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1893 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1895 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1896 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1897 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1898 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1899 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1900 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1901 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1902 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1904
1905 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1906 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1907 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1908 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1909 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1910 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1911 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1912 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1914 // Float and double probes don't return value because dtrace doesn't currently support it
1915 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1916 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1917 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1918 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1919 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1920 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1921
1922 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1923 , EntryProbe, ResultProbe) \
1924 \
1925 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1926 , ResultProbe); \
1927 \
1928 JNI_ENTRY(ResultType, \
1929 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1930 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1931 \
1932 EntryProbe; \
1933 ResultType ret = 0;\
1934 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1935 (const ResultType&)ret);\
1936 \
1937 JavaValue jvalue(Tag); \
1938 JNI_ArgumentPusherArray ap(methodID, args); \
1939 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1940 ret = jvalue.get_##ResultType(); \
1941 return ret;\
1942 JNI_END
1943
1944 // the runtime type of subword integral basic types is integer
1945 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1946 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1948 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1949 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1950 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1951 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1952 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1953 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1954 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1955 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1957
1958 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1959 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1960 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1961 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1962 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1963 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1964 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1965 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1967 // Float and double probes don't return value because dtrace doesn't currently support it
1968 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1969 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1970 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1971 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1972 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1973 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1974
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1977 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1978 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1979 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1980 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1981
1982 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1983 JNIWrapper("CallStaticVoidMethod");
1984 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1985 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1986
1987 va_list args;
1988 va_start(args, methodID);
1989 JavaValue jvalue(T_VOID);
1990 JNI_ArgumentPusherVaArg ap(methodID, args);
1991 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1992 va_end(args);
1993 JNI_END
1994
1995
1996 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1997 JNIWrapper("CallStaticVoidMethodV");
1998 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1999 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2000
2001 JavaValue jvalue(T_VOID);
2002 JNI_ArgumentPusherVaArg ap(methodID, args);
2003 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2004 JNI_END
2005
2006
2007 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2008 JNIWrapper("CallStaticVoidMethodA");
2009 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2010 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2011
2012 JavaValue jvalue(T_VOID);
2013 JNI_ArgumentPusherArray ap(methodID, args);
2014 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2015 JNI_END
2016
2017
2018 //
2019 // Accessing Fields
2020 //
2021
2022
2023 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2024 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2025
2026 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2027 const char *name, const char *sig))
2028 JNIWrapper("GetFieldID");
2029 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2030 jfieldID ret = 0;
2031 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2032
2033 // The class should have been loaded (we have an instance of the class
2034 // passed in) so the field and signature should already be in the symbol
2035 // table. If they're not there, the field doesn't exist.
2036 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2037 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2038 if (fieldname == NULL || signame == NULL) {
2039 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2040 }
2041 KlassHandle k(THREAD,
2042 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2043 // Make sure class is initialized before handing id's out to fields
2044 k()->initialize(CHECK_NULL);
2045
2046 fieldDescriptor fd;
2047 if (!k()->oop_is_instance() ||
2048 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2049 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2050 }
2051
2052 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2053 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2054 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2055 return ret;
2056 JNI_END
2057
2058
2059 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2060 JNIWrapper("GetObjectField");
2061 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2062 oop o = JNIHandles::resolve_non_null(obj);
2063 Klass* k = o->klass();
2064 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2065 // Keep JVMTI addition small and only check enabled flag here.
2066 // jni_GetField_probe() assumes that is okay to create handles.
2067 if (JvmtiExport::should_post_field_access()) {
2068 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2069 }
2070 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2071 #if INCLUDE_ALL_GCS
2072 // If G1 is enabled and we are accessing the value of the referent
2073 // field in a reference object then we need to register a non-null
2074 // referent with the SATB barrier.
2075 if (UseG1GC || UseShenandoahGC) {
2076 bool needs_barrier = false;
2077
2078 if (ret != NULL &&
2079 offset == java_lang_ref_Reference::referent_offset &&
2080 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2081 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2082 needs_barrier = true;
2083 }
2084
2085 if (needs_barrier) {
2086 oop referent = JNIHandles::resolve(ret);
2087 G1SATBCardTableModRefBS::enqueue(referent);
2088 }
2089 }
2090 #endif // INCLUDE_ALL_GCS
2091 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2092 return ret;
2093 JNI_END
2094
2095
2096
2097 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2098 , EntryProbe, ReturnProbe) \
2099 \
2100 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2101 , ReturnProbe); \
2102 \
2103 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2104 JNIWrapper("Get" XSTR(Result) "Field"); \
2105 \
2106 EntryProbe; \
2107 Return ret = 0;\
2108 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2109 \
2110 oop o = JNIHandles::resolve_non_null(obj); \
2111 Klass* k = o->klass(); \
2112 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2113 /* Keep JVMTI addition small and only check enabled flag here. */ \
2114 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2115 /* and creates a ResetNoHandleMark. */ \
2116 if (JvmtiExport::should_post_field_access()) { \
2117 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2118 } \
2119 ret = o->Fieldname##_field(offset); \
2120 return ret; \
2121 JNI_END
2122
2123 DEFINE_GETFIELD(jboolean, bool, Boolean
2124 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2126 DEFINE_GETFIELD(jbyte, byte, Byte
2127 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2129 DEFINE_GETFIELD(jchar, char, Char
2130 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2131 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2132 DEFINE_GETFIELD(jshort, short, Short
2133 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2134 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2135 DEFINE_GETFIELD(jint, int, Int
2136 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2137 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2138 DEFINE_GETFIELD(jlong, long, Long
2139 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2140 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2141 // Float and double probes don't return value because dtrace doesn't currently support it
2142 DEFINE_GETFIELD(jfloat, float, Float
2143 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2144 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2145 DEFINE_GETFIELD(jdouble, double, Double
2146 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2147 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2148
2149 address jni_GetBooleanField_addr() {
2150 return (address)jni_GetBooleanField;
2151 }
2152 address jni_GetByteField_addr() {
2153 return (address)jni_GetByteField;
2154 }
2155 address jni_GetCharField_addr() {
2156 return (address)jni_GetCharField;
2157 }
2158 address jni_GetShortField_addr() {
2159 return (address)jni_GetShortField;
2160 }
2161 address jni_GetIntField_addr() {
2162 return (address)jni_GetIntField;
2163 }
2164 address jni_GetLongField_addr() {
2165 return (address)jni_GetLongField;
2166 }
2167 address jni_GetFloatField_addr() {
2168 return (address)jni_GetFloatField;
2169 }
2170 address jni_GetDoubleField_addr() {
2171 return (address)jni_GetDoubleField;
2172 }
2173
2174 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2175 JNIWrapper("SetObjectField");
2176 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2177 oop o = JNIHandles::resolve_non_null(obj);
2178 Klass* k = o->klass();
2179 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2180 // Keep JVMTI addition small and only check enabled flag here.
2181 // jni_SetField_probe_nh() assumes that is not okay to create handles
2182 // and creates a ResetNoHandleMark.
2183 if (JvmtiExport::should_post_field_modification()) {
2184 jvalue field_value;
2185 field_value.l = value;
2186 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2187 }
2188 o->obj_field_put(offset, JNIHandles::resolve(value));
2189 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2190 JNI_END
2191
2192
2193 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2194 , EntryProbe, ReturnProbe) \
2195 \
2196 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2197 JNIWrapper("Set" XSTR(Result) "Field"); \
2198 \
2199 EntryProbe; \
2200 \
2201 oop o = JNIHandles::resolve_non_null(obj); \
2202 Klass* k = o->klass(); \
2203 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2204 /* Keep JVMTI addition small and only check enabled flag here. */ \
2205 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2206 /* and creates a ResetNoHandleMark. */ \
2207 if (JvmtiExport::should_post_field_modification()) { \
2208 jvalue field_value; \
2209 field_value.unionType = value; \
2210 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2211 } \
2212 o->Fieldname##_field_put(offset, value); \
2213 ReturnProbe; \
2214 JNI_END
2215
2216 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2217 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2218 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2219 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2220 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2221 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2222 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2223 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2224 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2225 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2226 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2227 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2228 DEFINE_SETFIELD(jint, int, Int, 'I', i
2229 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2230 HOTSPOT_JNI_SETINTFIELD_RETURN())
2231 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2232 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2233 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2234 // Float and double probes don't return value because dtrace doesn't currently support it
2235 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2236 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2237 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2238 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2239 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2240 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2241
2242 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2243 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2244
2245 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2246 JNIWrapper("ToReflectedField");
2247 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2248 jobject ret = NULL;
2249 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2250
2251 fieldDescriptor fd;
2252 bool found = false;
2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2254
2255 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2256
2257 if (isStatic) {
2258 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2259 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2260 assert(id->is_static_field_id(), "invalid static field id");
2261 found = id->find_local_field(&fd);
2262 } else {
2263 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2264 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2265 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2266 }
2267 assert(found, "bad fieldID passed into jni_ToReflectedField");
2268 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2269 ret = JNIHandles::make_local(env, reflected);
2270 return ret;
2271 JNI_END
2272
2273
2274 //
2275 // Accessing Static Fields
2276 //
2277 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2278 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2279
2280 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2281 const char *name, const char *sig))
2282 JNIWrapper("GetStaticFieldID");
2283 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2284 jfieldID ret = NULL;
2285 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2286
2287 // The class should have been loaded (we have an instance of the class
2288 // passed in) so the field and signature should already be in the symbol
2289 // table. If they're not there, the field doesn't exist.
2290 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2291 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2292 if (fieldname == NULL || signame == NULL) {
2293 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2294 }
2295 KlassHandle k(THREAD,
2296 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2297 // Make sure class is initialized before handing id's out to static fields
2298 k()->initialize(CHECK_NULL);
2299
2300 fieldDescriptor fd;
2301 if (!k()->oop_is_instance() ||
2302 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2303 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2304 }
2305
2306 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2307 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2308 debug_only(id->set_is_static_field_id();)
2309
2310 debug_only(id->verify(fd.field_holder()));
2311
2312 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2313 return ret;
2314 JNI_END
2315
2316
2317 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2318 JNIWrapper("GetStaticObjectField");
2319 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2320 #if INCLUDE_JNI_CHECK
2321 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2322 #endif // INCLUDE_JNI_CHECK
2323 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2324 assert(id->is_static_field_id(), "invalid static field id");
2325 // Keep JVMTI addition small and only check enabled flag here.
2326 // jni_GetField_probe() assumes that is okay to create handles.
2327 if (JvmtiExport::should_post_field_access()) {
2328 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2329 }
2330 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2331 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2332 return ret;
2333 JNI_END
2334
2335
2336 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2337 , EntryProbe, ReturnProbe) \
2338 \
2339 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2340 , ReturnProbe); \
2341 \
2342 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2343 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2344 EntryProbe; \
2345 Return ret = 0;\
2346 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2347 (const Return&)ret);\
2348 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2349 assert(id->is_static_field_id(), "invalid static field id"); \
2350 /* Keep JVMTI addition small and only check enabled flag here. */ \
2351 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2352 if (JvmtiExport::should_post_field_access()) { \
2353 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2354 } \
2355 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2356 return ret;\
2357 JNI_END
2358
2359 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2360 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2361 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2362 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2363 DEFINE_GETSTATICFIELD(jchar, char, Char
2364 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2365 DEFINE_GETSTATICFIELD(jshort, short, Short
2366 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2367 DEFINE_GETSTATICFIELD(jint, int, Int
2368 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2369 DEFINE_GETSTATICFIELD(jlong, long, Long
2370 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2371 // Float and double probes don't return value because dtrace doesn't currently support it
2372 DEFINE_GETSTATICFIELD(jfloat, float, Float
2373 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2374 DEFINE_GETSTATICFIELD(jdouble, double, Double
2375 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2376
2377 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2378 JNIWrapper("SetStaticObjectField");
2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2381 assert(id->is_static_field_id(), "invalid static field id");
2382 // Keep JVMTI addition small and only check enabled flag here.
2383 // jni_SetField_probe() assumes that is okay to create handles.
2384 if (JvmtiExport::should_post_field_modification()) {
2385 jvalue field_value;
2386 field_value.l = value;
2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2388 }
2389 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2390 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2391 JNI_END
2392
2393
2394
2395 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2396 , EntryProbe, ReturnProbe) \
2397 \
2398 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2399 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2400 EntryProbe; \
2401 \
2402 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2403 assert(id->is_static_field_id(), "invalid static field id"); \
2404 /* Keep JVMTI addition small and only check enabled flag here. */ \
2405 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2406 if (JvmtiExport::should_post_field_modification()) { \
2407 jvalue field_value; \
2408 field_value.unionType = value; \
2409 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2410 } \
2411 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2412 ReturnProbe;\
2413 JNI_END
2414
2415 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2416 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2417 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2419 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2420 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2422 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2425 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2428 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2430 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2431 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2432 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2433 // Float and double probes don't return value because dtrace doesn't currently support it
2434 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2435 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2436 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2437 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2438 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2439 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2440
2441 //
2442 // String Operations
2443 //
2444
2445 // Unicode Interface
2446
2447 DT_RETURN_MARK_DECL(NewString, jstring
2448 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2449
2450 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2451 JNIWrapper("NewString");
2452 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2453 jstring ret = NULL;
2454 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2455 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2456 ret = (jstring) JNIHandles::make_local(env, string);
2457 return ret;
2458 JNI_END
2459
2460
2461 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2462 JNIWrapper("GetStringLength");
2463 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2464 jsize ret = 0;
2465 oop s = JNIHandles::resolve_non_null(string);
2466 if (java_lang_String::value(s) != NULL) {
2467 ret = java_lang_String::length(s);
2468 }
2469 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2470 return ret;
2471 JNI_END
2472
2473
2474 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2475 JNIEnv *env, jstring string, jboolean *isCopy))
2476 JNIWrapper("GetStringChars");
2477 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2478 jchar* buf = NULL;
2479 oop s = JNIHandles::resolve_non_null(string);
2480 typeArrayOop s_value = java_lang_String::value(s);
2481 if (s_value != NULL) {
2482 int s_len = java_lang_String::length(s);
2483 int s_offset = java_lang_String::offset(s);
2484 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2485 /* JNI Specification states return NULL on OOM */
2486 if (buf != NULL) {
2487 if (s_len > 0) {
2488 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2489 }
2490 buf[s_len] = 0;
2491 //%note jni_5
2492 if (isCopy != NULL) {
2493 *isCopy = JNI_TRUE;
2494 }
2495 }
2496 }
2497 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2498 return buf;
2499 JNI_END
2500
2501
2502 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2503 JNIWrapper("ReleaseStringChars");
2504 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2505 //%note jni_6
2506 if (chars != NULL) {
2507 // Since String objects are supposed to be immutable, don't copy any
2508 // new data back. A bad user will have to go after the char array.
2509 FreeHeap((void*) chars);
2510 }
2511 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2512 JNI_END
2513
2514
2515 // UTF Interface
2516
2517 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2518 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2519
2520 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2521 JNIWrapper("NewStringUTF");
2522 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2523 jstring ret;
2524 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2525
2526 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2527 ret = (jstring) JNIHandles::make_local(env, result);
2528 return ret;
2529 JNI_END
2530
2531
2532 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2533 JNIWrapper("GetStringUTFLength");
2534 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2535 jsize ret = 0;
2536 oop java_string = JNIHandles::resolve_non_null(string);
2537 if (java_lang_String::value(java_string) != NULL) {
2538 ret = java_lang_String::utf8_length(java_string);
2539 }
2540 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2541 return ret;
2542 JNI_END
2543
2544
2545 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2546 JNIWrapper("GetStringUTFChars");
2547 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2548 char* result = NULL;
2549 oop java_string = JNIHandles::resolve_non_null(string);
2550 if (java_lang_String::value(java_string) != NULL) {
2551 size_t length = java_lang_String::utf8_length(java_string);
2552 /* JNI Specification states return NULL on OOM */
2553 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2554 if (result != NULL) {
2555 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2556 if (isCopy != NULL) {
2557 *isCopy = JNI_TRUE;
2558 }
2559 }
2560 }
2561 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2562 return result;
2563 JNI_END
2564
2565
2566 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2567 JNIWrapper("ReleaseStringUTFChars");
2568 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2569 if (chars != NULL) {
2570 FreeHeap((char*) chars);
2571 }
2572 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2573 JNI_END
2574
2575
2576 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2577 JNIWrapper("GetArrayLength");
2578 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2579 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2580 assert(a->is_array(), "must be array");
2581 jsize ret = a->length();
2582 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2583 return ret;
2584 JNI_END
2585
2586
2587 //
2588 // Object Array Operations
2589 //
2590
2591 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2592 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2593
2594 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2595 JNIWrapper("NewObjectArray");
2596 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2597 jobjectArray ret = NULL;
2598 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2599 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2600 Klass* ako = ek()->array_klass(CHECK_NULL);
2601 KlassHandle ak = KlassHandle(THREAD, ako);
2602 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2603 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2604 oop initial_value = JNIHandles::resolve(initialElement);
2605 if (initial_value != NULL) { // array already initialized with NULL
2606 for (int index = 0; index < length; index++) {
2607 result->obj_at_put(index, initial_value);
2608 }
2609 }
2610 ret = (jobjectArray) JNIHandles::make_local(env, result);
2611 return ret;
2612 JNI_END
2613
2614 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2615 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2616
2617 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2618 JNIWrapper("GetObjectArrayElement");
2619 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2620 jobject ret = NULL;
2621 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2622 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2623 if (a->is_within_bounds(index)) {
2624 ret = JNIHandles::make_local(env, a->obj_at(index));
2625 return ret;
2626 } else {
2627 char buf[jintAsStringSize];
2628 sprintf(buf, "%d", index);
2629 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2630 }
2631 JNI_END
2632
2633 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2634 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2635
2636 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2637 JNIWrapper("SetObjectArrayElement");
2638 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2639 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2640
2641 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2642 oop v = JNIHandles::resolve(value);
2643 if (a->is_within_bounds(index)) {
2644 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2645 a->obj_at_put(index, v);
2646 } else {
2647 THROW(vmSymbols::java_lang_ArrayStoreException());
2648 }
2649 } else {
2650 char buf[jintAsStringSize];
2651 sprintf(buf, "%d", index);
2652 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2653 }
2654 JNI_END
2655
2656
2657
2658 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2659 ,EntryProbe,ReturnProbe) \
2660 \
2661 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2662 , ReturnProbe); \
2663 \
2664 JNI_ENTRY(Return, \
2665 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2666 JNIWrapper("New" XSTR(Result) "Array"); \
2667 EntryProbe; \
2668 Return ret = NULL;\
2669 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2670 \
2671 oop obj= oopFactory::Allocator(len, CHECK_0); \
2672 ret = (Return) JNIHandles::make_local(env, obj); \
2673 return ret;\
2674 JNI_END
2675
2676 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2677 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2678 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2679 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2680 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2681 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2682 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2683 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2684 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2685 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2686 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2687 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2689 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2690 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2692 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2693 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2694 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2695 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2696 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2697 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2698 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2699 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2700
2701 // Return an address which will fault if the caller writes to it.
2702
2703 static char* get_bad_address() {
2704 static char* bad_address = NULL;
2705 if (bad_address == NULL) {
2706 size_t size = os::vm_allocation_granularity();
2707 bad_address = os::reserve_memory(size);
2708 if (bad_address != NULL) {
2709 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2710 /*is_committed*/false);
2711 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2712 }
2713 }
2714 return bad_address;
2715 }
2716
2717
2718
2719 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2720 , EntryProbe, ReturnProbe) \
2721 \
2722 JNI_QUICK_ENTRY(ElementType*, \
2723 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2724 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2725 EntryProbe; \
2726 /* allocate an chunk of memory in c land */ \
2727 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2728 a = typeArrayOop(oopDesc::bs()->read_barrier(a)); \
2729 ElementType* result; \
2730 int len = a->length(); \
2731 if (len == 0) { \
2732 /* Empty array: legal but useless, can't return NULL. \
2733 * Return a pointer to something useless. \
2734 * Avoid asserts in typeArrayOop. */ \
2735 result = (ElementType*)get_bad_address(); \
2736 } else { \
2737 /* JNI Specification states return NULL on OOM */ \
2738 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2739 if (result != NULL) { \
2740 /* copy the array to the c chunk */ \
2741 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2742 if (isCopy) { \
2743 *isCopy = JNI_TRUE; \
2744 } \
2745 } \
2746 } \
2747 ReturnProbe; \
2748 return result; \
2749 JNI_END
2750
2751 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2752 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2753 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2754 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2755 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2757 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2758 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2761 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2764 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2767 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2769 // Float and double probes don't return value because dtrace doesn't currently support it
2770 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2771 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2772 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2774 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2776
2777
2778 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2779 , EntryProbe, ReturnProbe);\
2780 \
2781 JNI_QUICK_ENTRY(void, \
2782 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2783 ElementType *buf, jint mode)) \
2784 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2785 EntryProbe; \
2786 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2787 a = typeArrayOop(oopDesc::bs()->write_barrier(a)); \
2788 int len = a->length(); \
2789 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2790 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2791 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2792 } \
2793 if ((mode == 0) || (mode == JNI_ABORT)) { \
2794 FreeHeap(buf); \
2795 } \
2796 } \
2797 ReturnProbe; \
2798 JNI_END
2799
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2801 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2802 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2804 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2805 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2807 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2808 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2809 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2810 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2811 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2812 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2813 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2814 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2815 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2816 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2817 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2818 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2819 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2820 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2821 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2822 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2823 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2824
2825
2826 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2827 , EntryProbe, ReturnProbe); \
2828 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2829 , ReturnProbe); \
2830 \
2831 JNI_ENTRY(void, \
2832 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2833 jsize len, ElementType *buf)) \
2834 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2835 EntryProbe; \
2836 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2837 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2838 src = typeArrayOop(oopDesc::bs()->read_barrier(src)); \
2839 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2840 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2841 } else { \
2842 if (len > 0) { \
2843 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2844 memcpy((u_char*) buf, \
2845 (u_char*) src->Tag##_at_addr(start), \
2846 len << sc); \
2847 } \
2848 } \
2849 JNI_END
2850
2851 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2852 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2853 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2855 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2856 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2858 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2859 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2861 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2862 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2864 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2865 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2867 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2868 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2870 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2871 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2873 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2874 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2875
2876
2877 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2878 , EntryProbe, ReturnProbe); \
2879 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2880 ,ReturnProbe); \
2881 \
2882 JNI_ENTRY(void, \
2883 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2884 jsize len, const ElementType *buf)) \
2885 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2886 EntryProbe; \
2887 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2888 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2889 dst = typeArrayOop(oopDesc::bs()->write_barrier(dst)); \
2890 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2891 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2892 } else { \
2893 if (len > 0) { \
2894 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2895 memcpy((u_char*) dst->Tag##_at_addr(start), \
2896 (u_char*) buf, \
2897 len << sc); \
2898 } \
2899 } \
2900 JNI_END
2901
2902 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2903 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2904 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2905 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2906 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2907 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2909 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2910 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2912 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2913 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2915 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2916 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2918 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2919 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2921 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2922 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2923 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2924 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2925 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2926
2927
2928 //
2929 // Interception of natives
2930 //
2931
2932 // The RegisterNatives call being attempted tried to register with a method that
2933 // is not native. Ask JVM TI what prefixes have been specified. Then check
2934 // to see if the native method is now wrapped with the prefixes. See the
2935 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2936 static Method* find_prefixed_native(KlassHandle k,
2937 Symbol* name, Symbol* signature, TRAPS) {
2938 #if INCLUDE_JVMTI
2939 ResourceMark rm(THREAD);
2940 Method* method;
2941 int name_len = name->utf8_length();
2942 char* name_str = name->as_utf8();
2943 int prefix_count;
2944 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2945 for (int i = 0; i < prefix_count; i++) {
2946 char* prefix = prefixes[i];
2947 int prefix_len = (int)strlen(prefix);
2948
2949 // try adding this prefix to the method name and see if it matches another method name
2950 int trial_len = name_len + prefix_len;
2951 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2952 strcpy(trial_name_str, prefix);
2953 strcat(trial_name_str, name_str);
2954 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2955 if (trial_name == NULL) {
2956 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2957 }
2958 method = k()->lookup_method(trial_name, signature);
2959 if (method == NULL) {
2960 continue; // signature doesn't match, try the next prefix
2961 }
2962 if (method->is_native()) {
2963 method->set_is_prefixed_native();
2964 return method; // wahoo, we found a prefixed version of the method, return it
2965 }
2966 // found as non-native, so prefix is good, add it, probably just need more prefixes
2967 name_len = trial_len;
2968 name_str = trial_name_str;
2969 }
2970 #endif // INCLUDE_JVMTI
2971 return NULL; // not found
2972 }
2973
2974 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2975 Method* method = k()->lookup_method(name, signature);
2976 if (method == NULL) {
2977 ResourceMark rm;
2978 stringStream st;
2979 st.print("Method %s name or signature does not match",
2980 Method::name_and_sig_as_C_string(k(), name, signature));
2981 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2982 }
2983 if (!method->is_native()) {
2984 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2985 method = find_prefixed_native(k, name, signature, THREAD);
2986 if (method == NULL) {
2987 ResourceMark rm;
2988 stringStream st;
2989 st.print("Method %s is not declared as native",
2990 Method::name_and_sig_as_C_string(k(), name, signature));
2991 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2992 }
2993 }
2994
2995 if (entry != NULL) {
2996 method->set_native_function(entry,
2997 Method::native_bind_event_is_interesting);
2998 } else {
2999 method->clear_native_function();
3000 }
3001 if (PrintJNIResolving) {
3002 ResourceMark rm(THREAD);
3003 tty->print_cr("[Registering JNI native method %s.%s]",
3004 method->method_holder()->external_name(),
3005 method->name()->as_C_string());
3006 }
3007 return true;
3008 }
3009
3010 DT_RETURN_MARK_DECL(RegisterNatives, jint
3011 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3012
3013 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3014 const JNINativeMethod *methods,
3015 jint nMethods))
3016 JNIWrapper("RegisterNatives");
3017 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3018 jint ret = 0;
3019 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3020
3021 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3022
3023 for (int index = 0; index < nMethods; index++) {
3024 const char* meth_name = methods[index].name;
3025 const char* meth_sig = methods[index].signature;
3026 int meth_name_len = (int)strlen(meth_name);
3027
3028 // The class should have been loaded (we have an instance of the class
3029 // passed in) so the method and signature should already be in the symbol
3030 // table. If they're not there, the method doesn't exist.
3031 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3032 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3033
3034 if (name == NULL || signature == NULL) {
3035 ResourceMark rm;
3036 stringStream st;
3037 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3038 // Must return negative value on failure
3039 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3040 }
3041
3042 bool res = register_native(h_k, name, signature,
3043 (address) methods[index].fnPtr, THREAD);
3044 if (!res) {
3045 ret = -1;
3046 break;
3047 }
3048 }
3049 return ret;
3050 JNI_END
3051
3052
3053 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3054 JNIWrapper("UnregisterNatives");
3055 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3056 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3057 //%note jni_2
3058 if (k->oop_is_instance()) {
3059 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3060 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3061 if (m->is_native()) {
3062 m->clear_native_function();
3063 m->set_signature_handler(NULL);
3064 }
3065 }
3066 }
3067 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3068 return 0;
3069 JNI_END
3070
3071 //
3072 // Monitor functions
3073 //
3074
3075 DT_RETURN_MARK_DECL(MonitorEnter, jint
3076 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3077
3078 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3079 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3080 jint ret = JNI_ERR;
3081 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3082
3083 // If the object is null, we can't do anything with it
3084 if (jobj == NULL) {
3085 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3086 }
3087
3088 Handle obj(thread, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3089 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3090 ret = JNI_OK;
3091 return ret;
3092 JNI_END
3093
3094 DT_RETURN_MARK_DECL(MonitorExit, jint
3095 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3096
3097 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3098 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3099 jint ret = JNI_ERR;
3100 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3101
3102 // Don't do anything with a null object
3103 if (jobj == NULL) {
3104 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3105 }
3106
3107 Handle obj(THREAD, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3108 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3109
3110 ret = JNI_OK;
3111 return ret;
3112 JNI_END
3113
3114 //
3115 // Extensions
3116 //
3117
3118 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3119 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3120
3121 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3122 JNIWrapper("GetStringRegion");
3123 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3124 DT_VOID_RETURN_MARK(GetStringRegion);
3125 oop s = JNIHandles::resolve_non_null(string);
3126 int s_len = java_lang_String::length(s);
3127 if (start < 0 || len < 0 || start + len > s_len) {
3128 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3129 } else {
3130 if (len > 0) {
3131 int s_offset = java_lang_String::offset(s);
3132 typeArrayOop s_value = java_lang_String::value(s);
3133 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3134 }
3135 }
3136 JNI_END
3137
3138 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3139 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3140
3141 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3142 JNIWrapper("GetStringUTFRegion");
3143 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3144 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3145 oop s = JNIHandles::resolve_non_null(string);
3146 int s_len = java_lang_String::length(s);
3147 if (start < 0 || len < 0 || start + len > s_len) {
3148 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3149 } else {
3150 //%note jni_7
3151 if (len > 0) {
3152 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3153 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3154 // as_utf8_string null-terminates the result string
3155 } else {
3156 // JDK null-terminates the buffer even in len is zero
3157 if (buf != NULL) {
3158 buf[0] = 0;
3159 }
3160 }
3161 }
3162 JNI_END
3163
3164
3165 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3166 JNIWrapper("GetPrimitiveArrayCritical");
3167 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3168 GC_locker::lock_critical(thread);
3169 if (isCopy != NULL) {
3170 *isCopy = JNI_FALSE;
3171 }
3172 oop a = JNIHandles::resolve_non_null(array);
3173 a = oopDesc::bs()->write_barrier(a);
3174 assert(a->is_array(), "just checking");
3175 BasicType type;
3176 if (a->is_objArray()) {
3177 type = T_OBJECT;
3178 } else {
3179 type = TypeArrayKlass::cast(a->klass())->element_type();
3180 }
3181 void* ret = arrayOop(a)->base(type);
3182 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3183 return ret;
3184 JNI_END
3185
3186
3187 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3188 JNIWrapper("ReleasePrimitiveArrayCritical");
3189 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3190 // The array, carray and mode arguments are ignored
3191 GC_locker::unlock_critical(thread);
3192 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3193 JNI_END
3194
3195
3196 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3197 JNIWrapper("GetStringCritical");
3198 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3199 GC_locker::lock_critical(thread);
3200 if (isCopy != NULL) {
3201 *isCopy = JNI_FALSE;
3202 }
3203 oop s = JNIHandles::resolve_non_null(string);
3204 int s_len = java_lang_String::length(s);
3205 typeArrayOop s_value = java_lang_String::value(s);
3206 int s_offset = java_lang_String::offset(s);
3207 const jchar* ret;
3208 if (s_len > 0) {
3209 ret = s_value->char_at_addr(s_offset);
3210 } else {
3211 ret = (jchar*) s_value->base(T_CHAR);
3212 }
3213 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3214 return ret;
3215 JNI_END
3216
3217
3218 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3219 JNIWrapper("ReleaseStringCritical");
3220 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3221 // The str and chars arguments are ignored
3222 GC_locker::unlock_critical(thread);
3223 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3224 JNI_END
3225
3226
3227 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3228 JNIWrapper("jni_NewWeakGlobalRef");
3229 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3230 Handle ref_handle(thread, JNIHandles::resolve(ref));
3231 jweak ret = JNIHandles::make_weak_global(ref_handle);
3232 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3233 return ret;
3234 JNI_END
3235
3236 // Must be JNI_ENTRY (with HandleMark)
3237 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3238 JNIWrapper("jni_DeleteWeakGlobalRef");
3239 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3240 JNIHandles::destroy_weak_global(ref);
3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3242 JNI_END
3243
3244
3245 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3246 JNIWrapper("jni_ExceptionCheck");
3247 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3248 jni_check_async_exceptions(thread);
3249 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3250 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3251 return ret;
3252 JNI_END
3253
3254
3255 // Initialization state for three routines below relating to
3256 // java.nio.DirectBuffers
3257 static jint directBufferSupportInitializeStarted = 0;
3258 static volatile jint directBufferSupportInitializeEnded = 0;
3259 static volatile jint directBufferSupportInitializeFailed = 0;
3260 static jclass bufferClass = NULL;
3261 static jclass directBufferClass = NULL;
3262 static jclass directByteBufferClass = NULL;
3263 static jmethodID directByteBufferConstructor = NULL;
3264 static jfieldID directBufferAddressField = NULL;
3265 static jfieldID bufferCapacityField = NULL;
3266
3267 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3268 Handle loader; // null (bootstrap) loader
3269 Handle protection_domain; // null protection domain
3270
3271 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3272 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3273
3274 if (TraceClassResolution && result != NULL) {
3275 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3276 }
3277 return result;
3278 }
3279
3280 // These lookups are done with the NULL (bootstrap) ClassLoader to
3281 // circumvent any security checks that would be done by jni_FindClass.
3282 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3283 {
3284 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3285 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3286 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3287 return true;
3288 }
3289 JNI_END
3290
3291
3292 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3293 if (directBufferSupportInitializeFailed) {
3294 return false;
3295 }
3296
3297 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3298 if (!lookupDirectBufferClasses(env)) {
3299 directBufferSupportInitializeFailed = 1;
3300 return false;
3301 }
3302
3303 // Make global references for these
3304 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3305 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3306 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3307
3308 // Get needed field and method IDs
3309 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3310 if (env->ExceptionCheck()) {
3311 env->ExceptionClear();
3312 directBufferSupportInitializeFailed = 1;
3313 return false;
3314 }
3315 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3316 if (env->ExceptionCheck()) {
3317 env->ExceptionClear();
3318 directBufferSupportInitializeFailed = 1;
3319 return false;
3320 }
3321 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3322 if (env->ExceptionCheck()) {
3323 env->ExceptionClear();
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327
3328 if ((directByteBufferConstructor == NULL) ||
3329 (directBufferAddressField == NULL) ||
3330 (bufferCapacityField == NULL)) {
3331 directBufferSupportInitializeFailed = 1;
3332 return false;
3333 }
3334
3335 directBufferSupportInitializeEnded = 1;
3336 } else {
3337 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3338 os::naked_yield();
3339 }
3340 }
3341
3342 return !directBufferSupportInitializeFailed;
3343 }
3344
3345 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3346 {
3347 // thread_from_jni_environment() will block if VM is gone.
3348 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3349
3350 JNIWrapper("jni_NewDirectByteBuffer");
3351 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3352
3353 if (!directBufferSupportInitializeEnded) {
3354 if (!initializeDirectBufferSupport(env, thread)) {
3355 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3356 return NULL;
3357 }
3358 }
3359
3360 // Being paranoid about accidental sign extension on address
3361 jlong addr = (jlong) ((uintptr_t) address);
3362 // NOTE that package-private DirectByteBuffer constructor currently
3363 // takes int capacity
3364 jint cap = (jint) capacity;
3365 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3366 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3367 return ret;
3368 }
3369
3370 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3371 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3372
3373 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3374 {
3375 // thread_from_jni_environment() will block if VM is gone.
3376 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3377
3378 JNIWrapper("jni_GetDirectBufferAddress");
3379 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3380 void* ret = NULL;
3381 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3382
3383 if (!directBufferSupportInitializeEnded) {
3384 if (!initializeDirectBufferSupport(env, thread)) {
3385 return 0;
3386 }
3387 }
3388
3389 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3390 return 0;
3391 }
3392
3393 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3394 return ret;
3395 }
3396
3397 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3398 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3399
3400 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3401 {
3402 // thread_from_jni_environment() will block if VM is gone.
3403 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3404
3405 JNIWrapper("jni_GetDirectBufferCapacity");
3406 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3407 jlong ret = -1;
3408 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3409
3410 if (!directBufferSupportInitializeEnded) {
3411 if (!initializeDirectBufferSupport(env, thread)) {
3412 ret = 0;
3413 return ret;
3414 }
3415 }
3416
3417 if (buf == NULL) {
3418 return -1;
3419 }
3420
3421 if (!env->IsInstanceOf(buf, directBufferClass)) {
3422 return -1;
3423 }
3424
3425 // NOTE that capacity is currently an int in the implementation
3426 ret = env->GetIntField(buf, bufferCapacityField);
3427 return ret;
3428 }
3429
3430
3431 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3432 JNIWrapper("GetVersion");
3433 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3434 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3435 return CurrentVersion;
3436 JNI_END
3437
3438 extern struct JavaVM_ main_vm;
3439
3440 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3441 JNIWrapper("jni_GetJavaVM");
3442 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3443 *vm = (JavaVM *)(&main_vm);
3444 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3445 return JNI_OK;
3446 JNI_END
3447
3448 // Structure containing all jni functions
3449 struct JNINativeInterface_ jni_NativeInterface = {
3450 NULL,
3451 NULL,
3452 NULL,
3453
3454 NULL,
3455
3456 jni_GetVersion,
3457
3458 jni_DefineClass,
3459 jni_FindClass,
3460
3461 jni_FromReflectedMethod,
3462 jni_FromReflectedField,
3463
3464 jni_ToReflectedMethod,
3465
3466 jni_GetSuperclass,
3467 jni_IsAssignableFrom,
3468
3469 jni_ToReflectedField,
3470
3471 jni_Throw,
3472 jni_ThrowNew,
3473 jni_ExceptionOccurred,
3474 jni_ExceptionDescribe,
3475 jni_ExceptionClear,
3476 jni_FatalError,
3477
3478 jni_PushLocalFrame,
3479 jni_PopLocalFrame,
3480
3481 jni_NewGlobalRef,
3482 jni_DeleteGlobalRef,
3483 jni_DeleteLocalRef,
3484 jni_IsSameObject,
3485
3486 jni_NewLocalRef,
3487 jni_EnsureLocalCapacity,
3488
3489 jni_AllocObject,
3490 jni_NewObject,
3491 jni_NewObjectV,
3492 jni_NewObjectA,
3493
3494 jni_GetObjectClass,
3495 jni_IsInstanceOf,
3496
3497 jni_GetMethodID,
3498
3499 jni_CallObjectMethod,
3500 jni_CallObjectMethodV,
3501 jni_CallObjectMethodA,
3502 jni_CallBooleanMethod,
3503 jni_CallBooleanMethodV,
3504 jni_CallBooleanMethodA,
3505 jni_CallByteMethod,
3506 jni_CallByteMethodV,
3507 jni_CallByteMethodA,
3508 jni_CallCharMethod,
3509 jni_CallCharMethodV,
3510 jni_CallCharMethodA,
3511 jni_CallShortMethod,
3512 jni_CallShortMethodV,
3513 jni_CallShortMethodA,
3514 jni_CallIntMethod,
3515 jni_CallIntMethodV,
3516 jni_CallIntMethodA,
3517 jni_CallLongMethod,
3518 jni_CallLongMethodV,
3519 jni_CallLongMethodA,
3520 jni_CallFloatMethod,
3521 jni_CallFloatMethodV,
3522 jni_CallFloatMethodA,
3523 jni_CallDoubleMethod,
3524 jni_CallDoubleMethodV,
3525 jni_CallDoubleMethodA,
3526 jni_CallVoidMethod,
3527 jni_CallVoidMethodV,
3528 jni_CallVoidMethodA,
3529
3530 jni_CallNonvirtualObjectMethod,
3531 jni_CallNonvirtualObjectMethodV,
3532 jni_CallNonvirtualObjectMethodA,
3533 jni_CallNonvirtualBooleanMethod,
3534 jni_CallNonvirtualBooleanMethodV,
3535 jni_CallNonvirtualBooleanMethodA,
3536 jni_CallNonvirtualByteMethod,
3537 jni_CallNonvirtualByteMethodV,
3538 jni_CallNonvirtualByteMethodA,
3539 jni_CallNonvirtualCharMethod,
3540 jni_CallNonvirtualCharMethodV,
3541 jni_CallNonvirtualCharMethodA,
3542 jni_CallNonvirtualShortMethod,
3543 jni_CallNonvirtualShortMethodV,
3544 jni_CallNonvirtualShortMethodA,
3545 jni_CallNonvirtualIntMethod,
3546 jni_CallNonvirtualIntMethodV,
3547 jni_CallNonvirtualIntMethodA,
3548 jni_CallNonvirtualLongMethod,
3549 jni_CallNonvirtualLongMethodV,
3550 jni_CallNonvirtualLongMethodA,
3551 jni_CallNonvirtualFloatMethod,
3552 jni_CallNonvirtualFloatMethodV,
3553 jni_CallNonvirtualFloatMethodA,
3554 jni_CallNonvirtualDoubleMethod,
3555 jni_CallNonvirtualDoubleMethodV,
3556 jni_CallNonvirtualDoubleMethodA,
3557 jni_CallNonvirtualVoidMethod,
3558 jni_CallNonvirtualVoidMethodV,
3559 jni_CallNonvirtualVoidMethodA,
3560
3561 jni_GetFieldID,
3562
3563 jni_GetObjectField,
3564 jni_GetBooleanField,
3565 jni_GetByteField,
3566 jni_GetCharField,
3567 jni_GetShortField,
3568 jni_GetIntField,
3569 jni_GetLongField,
3570 jni_GetFloatField,
3571 jni_GetDoubleField,
3572
3573 jni_SetObjectField,
3574 jni_SetBooleanField,
3575 jni_SetByteField,
3576 jni_SetCharField,
3577 jni_SetShortField,
3578 jni_SetIntField,
3579 jni_SetLongField,
3580 jni_SetFloatField,
3581 jni_SetDoubleField,
3582
3583 jni_GetStaticMethodID,
3584
3585 jni_CallStaticObjectMethod,
3586 jni_CallStaticObjectMethodV,
3587 jni_CallStaticObjectMethodA,
3588 jni_CallStaticBooleanMethod,
3589 jni_CallStaticBooleanMethodV,
3590 jni_CallStaticBooleanMethodA,
3591 jni_CallStaticByteMethod,
3592 jni_CallStaticByteMethodV,
3593 jni_CallStaticByteMethodA,
3594 jni_CallStaticCharMethod,
3595 jni_CallStaticCharMethodV,
3596 jni_CallStaticCharMethodA,
3597 jni_CallStaticShortMethod,
3598 jni_CallStaticShortMethodV,
3599 jni_CallStaticShortMethodA,
3600 jni_CallStaticIntMethod,
3601 jni_CallStaticIntMethodV,
3602 jni_CallStaticIntMethodA,
3603 jni_CallStaticLongMethod,
3604 jni_CallStaticLongMethodV,
3605 jni_CallStaticLongMethodA,
3606 jni_CallStaticFloatMethod,
3607 jni_CallStaticFloatMethodV,
3608 jni_CallStaticFloatMethodA,
3609 jni_CallStaticDoubleMethod,
3610 jni_CallStaticDoubleMethodV,
3611 jni_CallStaticDoubleMethodA,
3612 jni_CallStaticVoidMethod,
3613 jni_CallStaticVoidMethodV,
3614 jni_CallStaticVoidMethodA,
3615
3616 jni_GetStaticFieldID,
3617
3618 jni_GetStaticObjectField,
3619 jni_GetStaticBooleanField,
3620 jni_GetStaticByteField,
3621 jni_GetStaticCharField,
3622 jni_GetStaticShortField,
3623 jni_GetStaticIntField,
3624 jni_GetStaticLongField,
3625 jni_GetStaticFloatField,
3626 jni_GetStaticDoubleField,
3627
3628 jni_SetStaticObjectField,
3629 jni_SetStaticBooleanField,
3630 jni_SetStaticByteField,
3631 jni_SetStaticCharField,
3632 jni_SetStaticShortField,
3633 jni_SetStaticIntField,
3634 jni_SetStaticLongField,
3635 jni_SetStaticFloatField,
3636 jni_SetStaticDoubleField,
3637
3638 jni_NewString,
3639 jni_GetStringLength,
3640 jni_GetStringChars,
3641 jni_ReleaseStringChars,
3642
3643 jni_NewStringUTF,
3644 jni_GetStringUTFLength,
3645 jni_GetStringUTFChars,
3646 jni_ReleaseStringUTFChars,
3647
3648 jni_GetArrayLength,
3649
3650 jni_NewObjectArray,
3651 jni_GetObjectArrayElement,
3652 jni_SetObjectArrayElement,
3653
3654 jni_NewBooleanArray,
3655 jni_NewByteArray,
3656 jni_NewCharArray,
3657 jni_NewShortArray,
3658 jni_NewIntArray,
3659 jni_NewLongArray,
3660 jni_NewFloatArray,
3661 jni_NewDoubleArray,
3662
3663 jni_GetBooleanArrayElements,
3664 jni_GetByteArrayElements,
3665 jni_GetCharArrayElements,
3666 jni_GetShortArrayElements,
3667 jni_GetIntArrayElements,
3668 jni_GetLongArrayElements,
3669 jni_GetFloatArrayElements,
3670 jni_GetDoubleArrayElements,
3671
3672 jni_ReleaseBooleanArrayElements,
3673 jni_ReleaseByteArrayElements,
3674 jni_ReleaseCharArrayElements,
3675 jni_ReleaseShortArrayElements,
3676 jni_ReleaseIntArrayElements,
3677 jni_ReleaseLongArrayElements,
3678 jni_ReleaseFloatArrayElements,
3679 jni_ReleaseDoubleArrayElements,
3680
3681 jni_GetBooleanArrayRegion,
3682 jni_GetByteArrayRegion,
3683 jni_GetCharArrayRegion,
3684 jni_GetShortArrayRegion,
3685 jni_GetIntArrayRegion,
3686 jni_GetLongArrayRegion,
3687 jni_GetFloatArrayRegion,
3688 jni_GetDoubleArrayRegion,
3689
3690 jni_SetBooleanArrayRegion,
3691 jni_SetByteArrayRegion,
3692 jni_SetCharArrayRegion,
3693 jni_SetShortArrayRegion,
3694 jni_SetIntArrayRegion,
3695 jni_SetLongArrayRegion,
3696 jni_SetFloatArrayRegion,
3697 jni_SetDoubleArrayRegion,
3698
3699 jni_RegisterNatives,
3700 jni_UnregisterNatives,
3701
3702 jni_MonitorEnter,
3703 jni_MonitorExit,
3704
3705 jni_GetJavaVM,
3706
3707 jni_GetStringRegion,
3708 jni_GetStringUTFRegion,
3709
3710 jni_GetPrimitiveArrayCritical,
3711 jni_ReleasePrimitiveArrayCritical,
3712
3713 jni_GetStringCritical,
3714 jni_ReleaseStringCritical,
3715
3716 jni_NewWeakGlobalRef,
3717 jni_DeleteWeakGlobalRef,
3718
3719 jni_ExceptionCheck,
3720
3721 jni_NewDirectByteBuffer,
3722 jni_GetDirectBufferAddress,
3723 jni_GetDirectBufferCapacity,
3724
3725 // New 1_6 features
3726
3727 jni_GetObjectRefType
3728 };
3729
3730
3731 // For jvmti use to modify jni function table.
3732 // Java threads in native contiues to run until it is transitioned
3733 // to VM at safepoint. Before the transition or before it is blocked
3734 // for safepoint it may access jni function table. VM could crash if
3735 // any java thread access the jni function table in the middle of memcpy.
3736 // To avoid this each function pointers are copied automically.
3737 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3738 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3739 intptr_t *a = (intptr_t *) jni_functions();
3740 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3741 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3742 Atomic::store_ptr(*b++, a++);
3743 }
3744 }
3745
3746 void quicken_jni_functions() {
3747 // Replace Get<Primitive>Field with fast versions
3748 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3749 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3750 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3751 // windows x86 currently needs SEH wrapper and the gain of the fast
3752 // versions currently isn't certain for server vm on uniprocessor.
3753 && os::is_MP()
3754 #endif
3755 ) {
3756 address func;
3757 func = JNI_FastGetField::generate_fast_get_boolean_field();
3758 if (func != (address)-1) {
3759 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3760 }
3761 func = JNI_FastGetField::generate_fast_get_byte_field();
3762 if (func != (address)-1) {
3763 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3764 }
3765 func = JNI_FastGetField::generate_fast_get_char_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_short_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_int_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_long_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3780 }
3781 func = JNI_FastGetField::generate_fast_get_float_field();
3782 if (func != (address)-1) {
3783 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3784 }
3785 func = JNI_FastGetField::generate_fast_get_double_field();
3786 if (func != (address)-1) {
3787 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3788 }
3789 }
3790 }
3791
3792 // Returns the function structure
3793 struct JNINativeInterface_* jni_functions() {
3794 #if INCLUDE_JNI_CHECK
3795 if (CheckJNICalls) return jni_functions_check();
3796 #endif // INCLUDE_JNI_CHECK
3797 return &jni_NativeInterface;
3798 }
3799
3800 // Returns the function structure
3801 struct JNINativeInterface_* jni_functions_nocheck() {
3802 return &jni_NativeInterface;
3803 }
3804
3805
3806 // Invocation API
3807
3808
3809 // Forward declaration
3810 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3811
3812 // Global invocation API vars
3813 volatile jint vm_created = 0;
3814 // Indicate whether it is safe to recreate VM
3815 volatile jint safe_to_recreate_vm = 1;
3816 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3817
3818
3819 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3820 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3821
3822 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3823 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3824
3825 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3826 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3827 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3828 jint ret = JNI_ERR;
3829 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3830
3831 if (Threads::is_supported_jni_version(args->version)) {
3832 ret = JNI_OK;
3833 }
3834 // 1.1 style no longer supported in hotspot.
3835 // According the JNI spec, we should update args->version on return.
3836 // We also use the structure to communicate with launcher about default
3837 // stack size.
3838 if (args->version == JNI_VERSION_1_1) {
3839 args->version = JNI_VERSION_1_2;
3840 // javaStackSize is int in arguments structure
3841 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3842 args->javaStackSize = (jint)(ThreadStackSize * K);
3843 }
3844 return ret;
3845 }
3846
3847 #ifndef PRODUCT
3848
3849 #include "gc/shared/collectedHeap.hpp"
3850 #include "gc/shared/gcTimer.hpp"
3851 #if INCLUDE_ALL_GCS
3852 #include "gc/g1/heapRegionRemSet.hpp"
3853 #endif
3854 #include "memory/guardedMemory.hpp"
3855 #include "utilities/ostream.hpp"
3856 #include "utilities/quickSort.hpp"
3857 #if INCLUDE_VM_STRUCTS
3858 #include "runtime/vmStructs.hpp"
3859 #endif
3860
3861 #define run_unit_test(unit_test_function_call) \
3862 tty->print_cr("Running test: " #unit_test_function_call); \
3863 unit_test_function_call
3864
3865 // Forward declaration
3866 void test_semaphore();
3867 void TestOS_test();
3868 void TestReservedSpace_test();
3869 void TestReserveMemorySpecial_test();
3870 void TestVirtualSpace_test();
3871 void TestMetaspaceAux_test();
3872 void TestMetachunk_test();
3873 void TestVirtualSpaceNode_test();
3874 void TestNewSize_test();
3875 void TestOldSize_test();
3876 void TestKlass_test();
3877 void TestBitMap_test();
3878 void TestAsUtf8();
3879 void Test_linked_list();
3880 void TestChunkedList_test();
3881 #if INCLUDE_ALL_GCS
3882 void TestOldFreeSpaceCalculation_test();
3883 void TestG1BiasedArray_test();
3884 void TestBufferingOopClosure_test();
3885 void TestCodeCacheRemSet_test();
3886 void FreeRegionList_test();
3887 void test_memset_with_concurrent_readers();
3888 #endif
3889
3890 void execute_internal_vm_tests() {
3891 if (ExecuteInternalVMTests) {
3892 tty->print_cr("Running internal VM tests");
3893 run_unit_test(test_semaphore());
3894 run_unit_test(TestOS_test());
3895 run_unit_test(TestReservedSpace_test());
3896 run_unit_test(TestReserveMemorySpecial_test());
3897 run_unit_test(TestVirtualSpace_test());
3898 run_unit_test(TestMetaspaceAux_test());
3899 run_unit_test(TestMetachunk_test());
3900 run_unit_test(TestVirtualSpaceNode_test());
3901 run_unit_test(GlobalDefinitions::test_globals());
3902 run_unit_test(GCTimerAllTest::all());
3903 run_unit_test(arrayOopDesc::test_max_array_length());
3904 run_unit_test(CollectedHeap::test_is_in());
3905 run_unit_test(QuickSort::test_quick_sort());
3906 run_unit_test(GuardedMemory::test_guarded_memory());
3907 run_unit_test(AltHashing::test_alt_hash());
3908 run_unit_test(test_loggc_filename());
3909 run_unit_test(TestNewSize_test());
3910 run_unit_test(TestOldSize_test());
3911 run_unit_test(TestKlass_test());
3912 run_unit_test(TestBitMap_test());
3913 run_unit_test(TestAsUtf8());
3914 run_unit_test(ObjectMonitor::sanity_checks());
3915 run_unit_test(Test_linked_list());
3916 run_unit_test(TestChunkedList_test());
3917 #if INCLUDE_VM_STRUCTS
3918 run_unit_test(VMStructs::test());
3919 #endif
3920 #if INCLUDE_ALL_GCS
3921 run_unit_test(TestOldFreeSpaceCalculation_test());
3922 run_unit_test(TestG1BiasedArray_test());
3923 run_unit_test(HeapRegionRemSet::test_prt());
3924 run_unit_test(TestBufferingOopClosure_test());
3925 run_unit_test(TestCodeCacheRemSet_test());
3926 if (UseG1GC) {
3927 run_unit_test(FreeRegionList_test());
3928 }
3929 run_unit_test(test_memset_with_concurrent_readers());
3930 #endif
3931 tty->print_cr("All internal VM tests passed");
3932 }
3933 }
3934
3935 #undef run_unit_test
3936
3937 #endif
3938
3939 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3940 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3941
3942 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3943 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3944
3945 jint result = JNI_ERR;
3946 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3947
3948 // We're about to use Atomic::xchg for synchronization. Some Zero
3949 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3950 // but __sync_lock_test_and_set is not guaranteed to do what we want
3951 // on all architectures. So we check it works before relying on it.
3952 #if defined(ZERO) && defined(ASSERT)
3953 {
3954 jint a = 0xcafebabe;
3955 jint b = Atomic::xchg(0xdeadbeef, &a);
3956 void *c = &a;
3957 void *d = Atomic::xchg_ptr(&b, &c);
3958 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3959 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3960 }
3961 #endif // ZERO && ASSERT
3962
3963 // At the moment it's only possible to have one Java VM,
3964 // since some of the runtime state is in global variables.
3965
3966 // We cannot use our mutex locks here, since they only work on
3967 // Threads. We do an atomic compare and exchange to ensure only
3968 // one thread can call this method at a time
3969
3970 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3971 // the add/dec implementations are dependent on whether we are running
3972 // on a multiprocessor, and at this stage of initialization the os::is_MP
3973 // function used to determine this will always return false. Atomic::xchg
3974 // does not have this problem.
3975 if (Atomic::xchg(1, &vm_created) == 1) {
3976 return JNI_EEXIST; // already created, or create attempt in progress
3977 }
3978 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3979 return JNI_ERR; // someone tried and failed and retry not allowed.
3980 }
3981
3982 assert(vm_created == 1, "vm_created is true during the creation");
3983
3984 /**
3985 * Certain errors during initialization are recoverable and do not
3986 * prevent this method from being called again at a later time
3987 * (perhaps with different arguments). However, at a certain
3988 * point during initialization if an error occurs we cannot allow
3989 * this function to be called again (or it will crash). In those
3990 * situations, the 'canTryAgain' flag is set to false, which atomically
3991 * sets safe_to_recreate_vm to 1, such that any new call to
3992 * JNI_CreateJavaVM will immediately fail using the above logic.
3993 */
3994 bool can_try_again = true;
3995
3996 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3997 if (result == JNI_OK) {
3998 JavaThread *thread = JavaThread::current();
3999 assert(!thread->has_pending_exception(), "should have returned not OK");
4000 /* thread is thread_in_vm here */
4001 *vm = (JavaVM *)(&main_vm);
4002 *(JNIEnv**)penv = thread->jni_environment();
4003
4004 // Tracks the time application was running before GC
4005 RuntimeService::record_application_start();
4006
4007 // Notify JVMTI
4008 if (JvmtiExport::should_post_thread_life()) {
4009 JvmtiExport::post_thread_start(thread);
4010 }
4011
4012 EventThreadStart event;
4013 if (event.should_commit()) {
4014 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4015 event.commit();
4016 }
4017
4018 #ifndef PRODUCT
4019 // Check if we should compile all classes on bootclasspath
4020 if (CompileTheWorld) ClassLoader::compile_the_world();
4021 if (ReplayCompiles) ciReplay::replay(thread);
4022
4023 // Some platforms (like Win*) need a wrapper around these test
4024 // functions in order to properly handle error conditions.
4025 test_error_handler();
4026 execute_internal_vm_tests();
4027 #endif
4028
4029 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4030 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4031 } else {
4032 // If create_vm exits because of a pending exception, exit with that
4033 // exception. In the future when we figure out how to reclaim memory,
4034 // we may be able to exit with JNI_ERR and allow the calling application
4035 // to continue.
4036 if (Universe::is_fully_initialized()) {
4037 // otherwise no pending exception possible - VM will already have aborted
4038 JavaThread* THREAD = JavaThread::current();
4039 if (HAS_PENDING_EXCEPTION) {
4040 HandleMark hm;
4041 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4042 }
4043 }
4044
4045 if (can_try_again) {
4046 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4047 safe_to_recreate_vm = 1;
4048 }
4049
4050 // Creation failed. We must reset vm_created
4051 *vm = 0;
4052 *(JNIEnv**)penv = 0;
4053 // reset vm_created last to avoid race condition. Use OrderAccess to
4054 // control both compiler and architectural-based reordering.
4055 OrderAccess::release_store(&vm_created, 0);
4056 }
4057
4058 return result;
4059
4060 }
4061
4062 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4063 jint result = 0;
4064 // On Windows, let CreateJavaVM run with SEH protection
4065 #ifdef _WIN32
4066 __try {
4067 #endif
4068 result = JNI_CreateJavaVM_inner(vm, penv, args);
4069 #ifdef _WIN32
4070 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4071 // Nothing to do.
4072 }
4073 #endif
4074 return result;
4075 }
4076
4077 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4078 // See bug 4367188, the wrapper can sometimes cause VM crashes
4079 // JNIWrapper("GetCreatedJavaVMs");
4080
4081 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4082
4083 if (vm_created) {
4084 if (numVMs != NULL) *numVMs = 1;
4085 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4086 } else {
4087 if (numVMs != NULL) *numVMs = 0;
4088 }
4089 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4090 return JNI_OK;
4091 }
4092
4093 extern "C" {
4094
4095 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4096 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4097
4098 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4099 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4100 jint res = JNI_ERR;
4101 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4102
4103 if (!vm_created) {
4104 res = JNI_ERR;
4105 return res;
4106 }
4107
4108 JNIWrapper("DestroyJavaVM");
4109 JNIEnv *env;
4110 JavaVMAttachArgs destroyargs;
4111 destroyargs.version = CurrentVersion;
4112 destroyargs.name = (char *)"DestroyJavaVM";
4113 destroyargs.group = NULL;
4114 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4115 if (res != JNI_OK) {
4116 return res;
4117 }
4118
4119 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4120 JavaThread* thread = JavaThread::current();
4121 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4122 if (Threads::destroy_vm()) {
4123 // Should not change thread state, VM is gone
4124 vm_created = false;
4125 res = JNI_OK;
4126 return res;
4127 } else {
4128 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4129 res = JNI_ERR;
4130 return res;
4131 }
4132 }
4133
4134
4135 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4136 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4137
4138 // Check below commented out from JDK1.2fcs as well
4139 /*
4140 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4141 return JNI_EVERSION;
4142 }
4143 */
4144
4145 Thread* t = ThreadLocalStorage::get_thread_slow();
4146 if (t != NULL) {
4147 // If the thread has been attached this operation is a no-op
4148 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4149 return JNI_OK;
4150 }
4151
4152 // Create a thread and mark it as attaching so it will be skipped by the
4153 // ThreadsListEnumerator - see CR 6404306
4154 JavaThread* thread = new JavaThread(true);
4155
4156 // Set correct safepoint info. The thread is going to call into Java when
4157 // initializing the Java level thread object. Hence, the correct state must
4158 // be set in order for the Safepoint code to deal with it correctly.
4159 thread->set_thread_state(_thread_in_vm);
4160 // Must do this before initialize_thread_local_storage
4161 thread->record_stack_base_and_size();
4162
4163 thread->initialize_thread_local_storage();
4164
4165 if (!os::create_attached_thread(thread)) {
4166 delete thread;
4167 return JNI_ERR;
4168 }
4169 // Enable stack overflow checks
4170 thread->create_stack_guard_pages();
4171
4172 thread->initialize_tlab();
4173
4174 thread->cache_global_variables();
4175
4176 // Crucial that we do not have a safepoint check for this thread, since it has
4177 // not been added to the Thread list yet.
4178 { Threads_lock->lock_without_safepoint_check();
4179 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4180 // avoid this thread trying to do a GC before it is added to the thread-list
4181 thread->set_active_handles(JNIHandleBlock::allocate_block());
4182 Threads::add(thread, daemon);
4183 Threads_lock->unlock();
4184 }
4185 // Create thread group and name info from attach arguments
4186 oop group = NULL;
4187 char* thread_name = NULL;
4188 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4189 group = JNIHandles::resolve(args->group);
4190 thread_name = args->name; // may be NULL
4191 }
4192 if (group == NULL) group = Universe::main_thread_group();
4193
4194 // Create Java level thread object and attach it to this thread
4195 bool attach_failed = false;
4196 {
4197 EXCEPTION_MARK;
4198 HandleMark hm(THREAD);
4199 Handle thread_group(THREAD, group);
4200 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4201 if (HAS_PENDING_EXCEPTION) {
4202 CLEAR_PENDING_EXCEPTION;
4203 // cleanup outside the handle mark.
4204 attach_failed = true;
4205 }
4206 }
4207
4208 if (attach_failed) {
4209 // Added missing cleanup
4210 thread->cleanup_failed_attach_current_thread();
4211 return JNI_ERR;
4212 }
4213
4214 // mark the thread as no longer attaching
4215 // this uses a fence to push the change through so we don't have
4216 // to regrab the threads_lock
4217 thread->set_done_attaching_via_jni();
4218
4219 // Set java thread status.
4220 java_lang_Thread::set_thread_status(thread->threadObj(),
4221 java_lang_Thread::RUNNABLE);
4222
4223 // Notify the debugger
4224 if (JvmtiExport::should_post_thread_life()) {
4225 JvmtiExport::post_thread_start(thread);
4226 }
4227
4228 EventThreadStart event;
4229 if (event.should_commit()) {
4230 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4231 event.commit();
4232 }
4233
4234 *(JNIEnv**)penv = thread->jni_environment();
4235
4236 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4237 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4238 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4239 // needed.
4240
4241 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4242
4243 // Perform any platform dependent FPU setup
4244 os::setup_fpu();
4245
4246 return JNI_OK;
4247 }
4248
4249
4250 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4251 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4252 if (!vm_created) {
4253 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4254 return JNI_ERR;
4255 }
4256
4257 JNIWrapper("AttachCurrentThread");
4258 jint ret = attach_current_thread(vm, penv, _args, false);
4259 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4260 return ret;
4261 }
4262
4263
4264 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4265 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4266 VM_Exit::block_if_vm_exited();
4267
4268 JNIWrapper("DetachCurrentThread");
4269
4270 // If the thread has been deattacted the operations is a no-op
4271 if (ThreadLocalStorage::thread() == NULL) {
4272 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4273 return JNI_OK;
4274 }
4275
4276 JavaThread* thread = JavaThread::current();
4277 if (thread->has_last_Java_frame()) {
4278 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4279 // Can't detach a thread that's running java, that can't work.
4280 return JNI_ERR;
4281 }
4282
4283 // Safepoint support. Have to do call-back to safepoint code, if in the
4284 // middel of a safepoint operation
4285 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4286
4287 // XXX: Note that JavaThread::exit() call below removes the guards on the
4288 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4289 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4290 // of the guards is visible in jni_AttachCurrentThread above,
4291 // the removal of the guards is buried below in JavaThread::exit()
4292 // here. The abstraction should be more symmetrically either exposed
4293 // or hidden (e.g. it could probably be hidden in the same
4294 // (platform-dependent) methods where we do alternate stack
4295 // maintenance work?)
4296 thread->exit(false, JavaThread::jni_detach);
4297 delete thread;
4298
4299 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4300 return JNI_OK;
4301 }
4302
4303 DT_RETURN_MARK_DECL(GetEnv, jint
4304 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4305
4306 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4307 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4308 jint ret = JNI_ERR;
4309 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4310
4311 if (!vm_created) {
4312 *penv = NULL;
4313 ret = JNI_EDETACHED;
4314 return ret;
4315 }
4316
4317 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4318 return ret;
4319 }
4320
4321 #ifndef JVMPI_VERSION_1
4322 // need these in order to be polite about older agents
4323 #define JVMPI_VERSION_1 ((jint)0x10000001)
4324 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4325 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4326 #endif // !JVMPI_VERSION_1
4327
4328 Thread* thread = ThreadLocalStorage::thread();
4329 if (thread != NULL && thread->is_Java_thread()) {
4330 if (Threads::is_supported_jni_version_including_1_1(version)) {
4331 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4332 ret = JNI_OK;
4333 return ret;
4334
4335 } else if (version == JVMPI_VERSION_1 ||
4336 version == JVMPI_VERSION_1_1 ||
4337 version == JVMPI_VERSION_1_2) {
4338 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4339 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4340 ret = JNI_EVERSION;
4341 return ret;
4342 } else if (JvmtiExport::is_jvmdi_version(version)) {
4343 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4344 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4345 ret = JNI_EVERSION;
4346 return ret;
4347 } else {
4348 *penv = NULL;
4349 ret = JNI_EVERSION;
4350 return ret;
4351 }
4352 } else {
4353 *penv = NULL;
4354 ret = JNI_EDETACHED;
4355 return ret;
4356 }
4357 }
4358
4359
4360 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4361 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4362 if (!vm_created) {
4363 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4364 return JNI_ERR;
4365 }
4366
4367 JNIWrapper("AttachCurrentThreadAsDaemon");
4368 jint ret = attach_current_thread(vm, penv, _args, true);
4369 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4370 return ret;
4371 }
4372
4373
4374 } // End extern "C"
4375
4376 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4377 NULL,
4378 NULL,
4379 NULL,
4380
4381 jni_DestroyJavaVM,
4382 jni_AttachCurrentThread,
4383 jni_DetachCurrentThread,
4384 jni_GetEnv,
4385 jni_AttachCurrentThreadAsDaemon
4386 };