1 /*
2 * Copyright (c) 1997, 2014, 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 "interpreter/linkResolver.hpp"
35 #include "utilities/macros.hpp"
36 #if INCLUDE_ALL_GCS
37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
38 #endif // INCLUDE_ALL_GCS
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/gcLocker.inline.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/atomic.inline.hpp"
63 #include "runtime/compilationPolicy.hpp"
64 #include "runtime/fieldDescriptor.hpp"
65 #include "runtime/fprofiler.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/orderAccess.inline.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/vm_operations.hpp"
77 #include "services/runtimeService.hpp"
78 #include "trace/tracing.hpp"
79 #include "utilities/defaultStream.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/histogram.hpp"
83
84 static jint CurrentVersion = JNI_VERSION_1_8;
85
86
87 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
88 // '-return' probe regardless of the return path is taken out of the function.
89 // Methods that have multiple return paths use this to avoid having to
90 // instrument each return path. Methods that use CHECK or THROW must use this
91 // since those macros can cause an immedate uninstrumented return.
92 //
93 // In order to get the return value, a reference to the variable containing
94 // the return value must be passed to the contructor of the object, and
95 // the return value must be set before return (since the mark object has
96 // a reference to it).
97 //
98 // Example:
99 // DT_RETURN_MARK_DECL(SomeFunc, int);
100 // JNI_ENTRY(int, SomeFunc, ...)
101 // int return_value = 0;
102 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
103 // foo(CHECK_0)
104 // return_value = 5;
105 // return return_value;
106 // JNI_END
107 #define DT_RETURN_MARK_DECL(name, type, probe) \
108 DTRACE_ONLY( \
109 class DTraceReturnProbeMark_##name { \
110 public: \
111 const type& _ret_ref; \
112 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
113 ~DTraceReturnProbeMark_##name() { \
114 probe; \
115 } \
116 } \
117 )
118 // Void functions are simpler since there's no return value
119 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 ~DTraceReturnProbeMark_##name() { \
124 probe; \
125 } \
126 } \
127 )
128
129 // Place these macros in the function to mark the return. Non-void
130 // functions need the type and address of the return value.
131 #define DT_RETURN_MARK(name, type, ref) \
132 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
133 #define DT_VOID_RETURN_MARK(name) \
134 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
135
136
137 // Use these to select distinct code for floating-point vs. non-floating point
138 // situations. Used from within common macros where we need slightly
139 // different behavior for Float/Double
140 #define FP_SELECT_Boolean(intcode, fpcode) intcode
141 #define FP_SELECT_Byte(intcode, fpcode) intcode
142 #define FP_SELECT_Char(intcode, fpcode) intcode
143 #define FP_SELECT_Short(intcode, fpcode) intcode
144 #define FP_SELECT_Object(intcode, fpcode) intcode
145 #define FP_SELECT_Int(intcode, fpcode) intcode
146 #define FP_SELECT_Long(intcode, fpcode) intcode
147 #define FP_SELECT_Float(intcode, fpcode) fpcode
148 #define FP_SELECT_Double(intcode, fpcode) fpcode
149 #define FP_SELECT(TypeName, intcode, fpcode) \
150 FP_SELECT_##TypeName(intcode, fpcode)
151
152 #define COMMA ,
153
154 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
155 // (dtrace doesn't do FP yet)
156 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
157 FP_SELECT(TypeName, \
158 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
159 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
160 FP_SELECT(TypeName, \
161 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
162
163
164 // out-of-line helpers for class jfieldIDWorkaround:
165
166 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
167 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
168 uintptr_t as_uint = (uintptr_t) id;
169 intptr_t offset = raw_instance_offset(id);
170 if (is_checked_jfieldID(id)) {
171 if (!klass_hash_ok(k, id)) {
172 return false;
173 }
174 }
175 return InstanceKlass::cast(k)->contains_field_offset(offset);
176 } else {
177 JNIid* result = (JNIid*) id;
178 #ifdef ASSERT
179 return result != NULL && result->is_static_field_id();
180 #else
181 return result != NULL;
182 #endif
183 }
184 }
185
186
187 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
188 if (offset <= small_offset_mask) {
189 Klass* field_klass = k;
190 Klass* super_klass = field_klass->super();
191 // With compressed oops the most super class with nonstatic fields would
192 // be the owner of fields embedded in the header.
193 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
194 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
195 field_klass = super_klass; // super contains the field also
196 super_klass = field_klass->super();
197 }
198 debug_only(No_Safepoint_Verifier nosafepoint;)
199 uintptr_t klass_hash = field_klass->identity_hash();
200 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
201 } else {
202 #if 0
203 #ifndef PRODUCT
204 {
205 ResourceMark rm;
206 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
207 }
208 #endif
209 #endif
210 return 0;
211 }
212 }
213
214 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
215 uintptr_t as_uint = (uintptr_t) id;
216 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
217 do {
218 debug_only(No_Safepoint_Verifier nosafepoint;)
219 // Could use a non-blocking query for identity_hash here...
220 if ((k->identity_hash() & klass_mask) == klass_hash)
221 return true;
222 k = k->super();
223 } while (k != NULL);
224 return false;
225 }
226
227 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
228 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
229 uintptr_t as_uint = (uintptr_t) id;
230 intptr_t offset = raw_instance_offset(id);
231 if (VerifyJNIFields) {
232 if (is_checked_jfieldID(id)) {
233 guarantee(klass_hash_ok(k, id),
234 "Bug in native code: jfieldID class must match object");
235 } else {
236 #if 0
237 #ifndef PRODUCT
238 if (Verbose) {
239 ResourceMark rm;
240 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
241 }
242 #endif
243 #endif
244 }
245 }
246 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
247 "Bug in native code: jfieldID offset must address interior of object");
248 }
249
250 // Wrapper to trace JNI functions
251
252 #ifdef ASSERT
253 Histogram* JNIHistogram;
254 static volatile jint JNIHistogram_lock = 0;
255
256 class JNITraceWrapper : public StackObj {
257 public:
258 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
259 if (TraceJNICalls) {
260 va_list ap;
261 va_start(ap, format);
262 tty->print("JNI ");
263 tty->vprint_cr(format, ap);
264 va_end(ap);
265 }
266 }
267 };
268
269 class JNIHistogramElement : public HistogramElement {
270 public:
271 JNIHistogramElement(const char* name);
272 };
273
274 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
275 _name = elementName;
276 uintx count = 0;
277
278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
280 count +=1;
281 if ( (WarnOnStalledSpinLock > 0)
282 && (count % WarnOnStalledSpinLock == 0)) {
283 warning("JNIHistogram_lock seems to be stalled");
284 }
285 }
286 }
287
288
289 if(JNIHistogram == NULL)
290 JNIHistogram = new Histogram("JNI Call Counts",100);
291
292 JNIHistogram->add_element(this);
293 Atomic::dec(&JNIHistogram_lock);
294 }
295
296 #define JNICountWrapper(arg) \
297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
299 if (e != NULL) e->increment_count()
300 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
301 #else
302 #define JNIWrapper(arg)
303 #endif
304
305
306 // Implementation of JNI entries
307
308 DT_RETURN_MARK_DECL(DefineClass, jclass
309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
312 const jbyte *buf, jsize bufLen))
313 JNIWrapper("DefineClass");
314
315 HOTSPOT_JNI_DEFINECLASS_ENTRY(
316 env, (char*) name, loaderRef, (char*) buf, bufLen);
317
318 jclass cls = NULL;
319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
320
321 TempNewSymbol class_name = NULL;
322 // Since exceptions can be thrown, class initialization can take place
323 // if name is NULL no check for class name in .class stream has to be made.
324 if (name != NULL) {
325 const int str_len = (int)strlen(name);
326 if (str_len > Symbol::max_length()) {
327 // It's impossible to create this class; the name cannot fit
328 // into the constant pool.
329 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
330 }
331 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
332 }
333 ResourceMark rm(THREAD);
334 ClassFileStream st((u1*) buf, bufLen, NULL);
335 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
336
337 if (UsePerfData && !class_loader.is_null()) {
338 // check whether the current caller thread holds the lock or not.
339 // If not, increment the corresponding counter
340 if (ObjectSynchronizer::
341 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
342 ObjectSynchronizer::owner_self) {
343 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
344 }
345 }
346 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
347 Handle(), &st, true,
348 CHECK_NULL);
349
350 if (TraceClassResolution && k != NULL) {
351 trace_class_resolution(k);
352 }
353
354 cls = (jclass)JNIHandles::make_local(
355 env, k->java_mirror());
356 return cls;
357 JNI_END
358
359
360
361 static bool first_time_FindClass = true;
362
363 DT_RETURN_MARK_DECL(FindClass, jclass
364 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
365
366 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
367 JNIWrapper("FindClass");
368
369 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
370
371 jclass result = NULL;
372 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
373
374 // Remember if we are the first invocation of jni_FindClass
375 bool first_time = first_time_FindClass;
376 first_time_FindClass = false;
377
378 // Sanity check the name: it cannot be null or larger than the maximum size
379 // name we can fit in the constant pool.
380 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
381 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
382 }
383
384 //%note jni_3
385 Handle loader;
386 Handle protection_domain;
387 // Find calling class
388 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
389 if (k.not_null()) {
390 loader = Handle(THREAD, k->class_loader());
391 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
392 // in the correct class context.
393 if (loader.is_null() &&
394 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
395 JavaValue result(T_OBJECT);
396 JavaCalls::call_static(&result, k,
397 vmSymbols::getFromClass_name(),
398 vmSymbols::void_class_signature(),
399 thread);
400 if (HAS_PENDING_EXCEPTION) {
401 Handle ex(thread, thread->pending_exception());
402 CLEAR_PENDING_EXCEPTION;
403 THROW_HANDLE_0(ex);
404 }
405 oop mirror = (oop) result.get_jobject();
406 loader = Handle(THREAD,
407 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
408 protection_domain = Handle(THREAD,
409 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
410 }
411 } else {
412 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
413 loader = Handle(THREAD, SystemDictionary::java_system_loader());
414 }
415
416 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
417 result = find_class_from_class_loader(env, sym, true, loader,
418 protection_domain, true, thread);
419
420 if (TraceClassResolution && result != NULL) {
421 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
422 }
423
424 // If we were the first invocation of jni_FindClass, we enable compilation again
425 // rather than just allowing invocation counter to overflow and decay.
426 // Controlled by flag DelayCompilationDuringStartup.
427 if (first_time && !CompileTheWorld)
428 CompilationPolicy::completed_vm_startup();
429
430 return result;
431 JNI_END
432
433 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
434 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
435
436 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
437 JNIWrapper("FromReflectedMethod");
438
439 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
440
441 jmethodID ret = NULL;
442 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
443
444 // method is a handle to a java.lang.reflect.Method object
445 oop reflected = JNIHandles::resolve_non_null(method);
446 oop mirror = NULL;
447 int slot = 0;
448
449 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
450 mirror = java_lang_reflect_Constructor::clazz(reflected);
451 slot = java_lang_reflect_Constructor::slot(reflected);
452 } else {
453 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
454 mirror = java_lang_reflect_Method::clazz(reflected);
455 slot = java_lang_reflect_Method::slot(reflected);
456 }
457 Klass* k = java_lang_Class::as_Klass(mirror);
458
459 KlassHandle k1(THREAD, k);
460 // Make sure class is initialized before handing id's out to methods
461 k1()->initialize(CHECK_NULL);
462 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
463 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
464 return ret;
465 JNI_END
466
467 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
468 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
469
470 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
471 JNIWrapper("FromReflectedField");
472
473 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
474
475 jfieldID ret = NULL;
476 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
477
478 // field is a handle to a java.lang.reflect.Field object
479 oop reflected = JNIHandles::resolve_non_null(field);
480 oop mirror = java_lang_reflect_Field::clazz(reflected);
481 Klass* k = java_lang_Class::as_Klass(mirror);
482 int slot = java_lang_reflect_Field::slot(reflected);
483 int modifiers = java_lang_reflect_Field::modifiers(reflected);
484
485 KlassHandle k1(THREAD, k);
486 // Make sure class is initialized before handing id's out to fields
487 k1()->initialize(CHECK_NULL);
488
489 // First check if this is a static field
490 if (modifiers & JVM_ACC_STATIC) {
491 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
492 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
493 assert(id != NULL, "corrupt Field object");
494 debug_only(id->set_is_static_field_id();)
495 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
496 ret = jfieldIDWorkaround::to_static_jfieldID(id);
497 return ret;
498 }
499
500 // The slot is the index of the field description in the field-array
501 // The jfieldID is the offset of the field within the object
502 // It may also have hash bits for k, if VerifyJNIFields is turned on.
503 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
504 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
505 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
506 return ret;
507 JNI_END
508
509
510 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
511 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
512
513 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
514 JNIWrapper("ToReflectedMethod");
515
516 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
517
518 jobject ret = NULL;
519 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
520
521 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
522 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
523 oop reflection_method;
524 if (m->is_initializer()) {
525 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
526 } else {
527 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
528 }
529 ret = JNIHandles::make_local(env, reflection_method);
530 return ret;
531 JNI_END
532
533 DT_RETURN_MARK_DECL(GetSuperclass, jclass
534 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
535
536 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
537 JNIWrapper("GetSuperclass");
538
539 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
540
541 jclass obj = NULL;
542 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
543
544 oop mirror = JNIHandles::resolve_non_null(sub);
545 // primitive classes return NULL
546 if (java_lang_Class::is_primitive(mirror)) return NULL;
547
548 // Rules of Class.getSuperClass as implemented by KLass::java_super:
549 // arrays return Object
550 // interfaces return NULL
551 // proper classes return Klass::super()
552 Klass* k = java_lang_Class::as_Klass(mirror);
553 if (k->is_interface()) return NULL;
554
555 // return mirror for superclass
556 Klass* super = k->java_super();
557 // super2 is the value computed by the compiler's getSuperClass intrinsic:
558 debug_only(Klass* super2 = ( k->oop_is_array()
559 ? SystemDictionary::Object_klass()
560 : k->super() ) );
561 assert(super == super2,
562 "java_super computation depends on interface, array, other super");
563 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
564 return obj;
565 JNI_END
566
567 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
568 JNIWrapper("IsSubclassOf");
569
570 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
571
572 oop sub_mirror = JNIHandles::resolve_non_null(sub);
573 oop super_mirror = JNIHandles::resolve_non_null(super);
574 if (java_lang_Class::is_primitive(sub_mirror) ||
575 java_lang_Class::is_primitive(super_mirror)) {
576 jboolean ret = (sub_mirror == super_mirror);
577
578 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
579 return ret;
580 }
581 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
582 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
583 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
584 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
585 JNI_TRUE : JNI_FALSE;
586
587 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
588 return ret;
589 JNI_END
590
591
592 DT_RETURN_MARK_DECL(Throw, jint
593 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
594
595 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
596 JNIWrapper("Throw");
597
598 HOTSPOT_JNI_THROW_ENTRY(env, obj);
599
600 jint ret = JNI_OK;
601 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
602
603 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
604 ShouldNotReachHere();
605 JNI_END
606
607
608 DT_RETURN_MARK_DECL(ThrowNew, jint
609 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
610
611 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
612 JNIWrapper("ThrowNew");
613
614 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
615
616 jint ret = JNI_OK;
617 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
618
619 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
620 Symbol* name = k->name();
621 Handle class_loader (THREAD, k->class_loader());
622 Handle protection_domain (THREAD, k->protection_domain());
623 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
624 ShouldNotReachHere();
625 JNI_END
626
627
628 // JNI functions only transform a pending async exception to a synchronous
629 // exception in ExceptionOccurred and ExceptionCheck calls, since
630 // delivering an async exception in other places won't change the native
631 // code's control flow and would be harmful when native code further calls
632 // JNI functions with a pending exception. Async exception is also checked
633 // during the call, so ExceptionOccurred/ExceptionCheck won't return
634 // false but deliver the async exception at the very end during
635 // state transition.
636
637 static void jni_check_async_exceptions(JavaThread *thread) {
638 assert(thread == Thread::current(), "must be itself");
639 thread->check_and_handle_async_exceptions();
640 }
641
642 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
643 JNIWrapper("ExceptionOccurred");
644
645 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
646
647 jni_check_async_exceptions(thread);
648 oop exception = thread->pending_exception();
649 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
650
651 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
652 return ret;
653 JNI_END
654
655
656 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
657 JNIWrapper("ExceptionDescribe");
658
659 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
660
661 if (thread->has_pending_exception()) {
662 Handle ex(thread, thread->pending_exception());
663 thread->clear_pending_exception();
664 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
665 // Don't print anything if we are being killed.
666 } else {
667 jio_fprintf(defaultStream::error_stream(), "Exception ");
668 if (thread != NULL && thread->threadObj() != NULL) {
669 ResourceMark rm(THREAD);
670 jio_fprintf(defaultStream::error_stream(),
671 "in thread \"%s\" ", thread->get_thread_name());
672 }
673 if (ex->is_a(SystemDictionary::Throwable_klass())) {
674 JavaValue result(T_VOID);
675 JavaCalls::call_virtual(&result,
676 ex,
677 KlassHandle(THREAD,
678 SystemDictionary::Throwable_klass()),
679 vmSymbols::printStackTrace_name(),
680 vmSymbols::void_method_signature(),
681 THREAD);
682 // If an exception is thrown in the call it gets thrown away. Not much
683 // we can do with it. The native code that calls this, does not check
684 // for the exception - hence, it might still be in the thread when DestroyVM gets
685 // called, potentially causing a few asserts to trigger - since no pending exception
686 // is expected.
687 CLEAR_PENDING_EXCEPTION;
688 } else {
689 ResourceMark rm(THREAD);
690 jio_fprintf(defaultStream::error_stream(),
691 ". Uncaught exception of type %s.",
692 ex->klass()->external_name());
693 }
694 }
695 }
696
697 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
698 JNI_END
699
700
701 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
702 JNIWrapper("ExceptionClear");
703
704 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
705
706 // The jni code might be using this API to clear java thrown exception.
707 // So just mark jvmti thread exception state as exception caught.
708 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
709 if (state != NULL && state->is_exception_detected()) {
710 state->set_exception_caught();
711 }
712 thread->clear_pending_exception();
713
714 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
715 JNI_END
716
717
718 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
719 JNIWrapper("FatalError");
720
721 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
722
723 tty->print_cr("FATAL ERROR in native method: %s", msg);
724 thread->print_stack();
725 os::abort(); // Dump core and abort
726 JNI_END
727
728
729 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
730 JNIWrapper("PushLocalFrame");
731
732 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
733
734 //%note jni_11
735 if (capacity < 0 ||
736 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
737 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
738 return JNI_ERR;
739 }
740 JNIHandleBlock* old_handles = thread->active_handles();
741 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
742 assert(new_handles != NULL, "should not be NULL");
743 new_handles->set_pop_frame_link(old_handles);
744 thread->set_active_handles(new_handles);
745 jint ret = JNI_OK;
746 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
747 return ret;
748 JNI_END
749
750
751 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
752 JNIWrapper("PopLocalFrame");
753
754 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
755
756 //%note jni_11
757 Handle result_handle(thread, JNIHandles::resolve(result));
758 JNIHandleBlock* old_handles = thread->active_handles();
759 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
760 if (new_handles != NULL) {
761 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
762 // This way code will still work if PopLocalFrame is called without a corresponding
763 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
764 // the release_block call will release the blocks.
765 thread->set_active_handles(new_handles);
766 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
767 JNIHandleBlock::release_block(old_handles, thread); // may block
768 result = JNIHandles::make_local(thread, result_handle());
769 }
770 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
771 return result;
772 JNI_END
773
774
775 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
776 JNIWrapper("NewGlobalRef");
777
778 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
779
780 Handle ref_handle(thread, JNIHandles::resolve(ref));
781 jobject ret = JNIHandles::make_global(ref_handle);
782
783 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
784 return ret;
785 JNI_END
786
787 // Must be JNI_ENTRY (with HandleMark)
788 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
789 JNIWrapper("DeleteGlobalRef");
790
791 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
792
793 JNIHandles::destroy_global(ref);
794
795 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
796 JNI_END
797
798 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
799 JNIWrapper("DeleteLocalRef");
800
801 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
802
803 JNIHandles::destroy_local(obj);
804
805 HOTSPOT_JNI_DELETELOCALREF_RETURN();
806 JNI_END
807
808 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
809 JNIWrapper("IsSameObject");
810
811 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
812
813 oop a = JNIHandles::resolve(r1);
814 oop b = JNIHandles::resolve(r2);
815 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
816
817 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
818 return ret;
819 JNI_END
820
821
822 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
823 JNIWrapper("NewLocalRef");
824
825 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
826
827 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
828
829 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
830 return ret;
831 JNI_END
832
833 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
834 JNIWrapper("EnsureLocalCapacity");
835
836 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
837
838 jint ret;
839 if (capacity >= 0 &&
840 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
841 ret = JNI_OK;
842 } else {
843 ret = JNI_ERR;
844 }
845
846 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
847 return ret;
848 JNI_END
849
850 // Return the Handle Type
851 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
852 JNIWrapper("GetObjectRefType");
853
854 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
855
856 jobjectRefType ret;
857 if (JNIHandles::is_local_handle(thread, obj) ||
858 JNIHandles::is_frame_handle(thread, obj))
859 ret = JNILocalRefType;
860 else if (JNIHandles::is_global_handle(obj))
861 ret = JNIGlobalRefType;
862 else if (JNIHandles::is_weak_global_handle(obj))
863 ret = JNIWeakGlobalRefType;
864 else
865 ret = JNIInvalidRefType;
866
867 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
868 return ret;
869 JNI_END
870
871
872 class JNI_ArgumentPusher : public SignatureIterator {
873 protected:
874 JavaCallArguments* _arguments;
875
876 virtual void get_bool () = 0;
877 virtual void get_char () = 0;
878 virtual void get_short () = 0;
879 virtual void get_byte () = 0;
880 virtual void get_int () = 0;
881 virtual void get_long () = 0;
882 virtual void get_float () = 0;
883 virtual void get_double () = 0;
884 virtual void get_object () = 0;
885
886 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
887 this->_return_type = T_ILLEGAL;
888 _arguments = NULL;
889 }
890
891 public:
892 virtual void iterate( uint64_t fingerprint ) = 0;
893
894 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
895
896 inline void do_bool() { if (!is_return_type()) get_bool(); }
897 inline void do_char() { if (!is_return_type()) get_char(); }
898 inline void do_short() { if (!is_return_type()) get_short(); }
899 inline void do_byte() { if (!is_return_type()) get_byte(); }
900 inline void do_int() { if (!is_return_type()) get_int(); }
901 inline void do_long() { if (!is_return_type()) get_long(); }
902 inline void do_float() { if (!is_return_type()) get_float(); }
903 inline void do_double() { if (!is_return_type()) get_double(); }
904 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
905 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
906 inline void do_void() { }
907
908 JavaCallArguments* arguments() { return _arguments; }
909 void push_receiver(Handle h) { _arguments->push_oop(h); }
910 };
911
912
913 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
914 protected:
915 va_list _ap;
916
917 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
918 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
919 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
920 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
921 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
922
923 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
924
925 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
926 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
927 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
928 inline void get_object() { jobject l = va_arg(_ap, jobject);
929 _arguments->push_oop(Handle((oop *)l, false)); }
930
931 inline void set_ap(va_list rap) {
932 #ifdef va_copy
933 va_copy(_ap, rap);
934 #elif defined (__va_copy)
935 __va_copy(_ap, rap);
936 #else
937 _ap = rap;
938 #endif
939 }
940
941 public:
942 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
943 : JNI_ArgumentPusher(signature) {
944 set_ap(rap);
945 }
946 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
947 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
948 set_ap(rap);
949 }
950
951 // Optimized path if we have the bitvector form of signature
952 void iterate( uint64_t fingerprint ) {
953 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments
954 else {
955 _return_type = (BasicType)((fingerprint >> static_feature_size) &
956 result_feature_mask);
957
958 assert(fingerprint, "Fingerprint should not be 0");
959 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
960 while ( 1 ) {
961 switch ( fingerprint & parameter_feature_mask ) {
962 case bool_parm:
963 case char_parm:
964 case short_parm:
965 case byte_parm:
966 case int_parm:
967 get_int();
968 break;
969 case obj_parm:
970 get_object();
971 break;
972 case long_parm:
973 get_long();
974 break;
975 case float_parm:
976 get_float();
977 break;
978 case double_parm:
979 get_double();
980 break;
981 case done_parm:
982 return;
983 break;
984 default:
985 ShouldNotReachHere();
986 break;
987 }
988 fingerprint >>= parameter_feature_size;
989 }
990 }
991 }
992 };
993
994
995 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
996 protected:
997 const jvalue *_ap;
998
999 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1000 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1001 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1002 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1003 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1004
1005 inline void get_long() { _arguments->push_long((_ap++)->j); }
1006 inline void get_float() { _arguments->push_float((_ap++)->f); }
1007 inline void get_double() { _arguments->push_double((_ap++)->d);}
1008 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1009
1010 inline void set_ap(const jvalue *rap) { _ap = rap; }
1011
1012 public:
1013 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1014 : JNI_ArgumentPusher(signature) {
1015 set_ap(rap);
1016 }
1017 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1018 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1019 set_ap(rap);
1020 }
1021
1022 // Optimized path if we have the bitvector form of signature
1023 void iterate( uint64_t fingerprint ) {
1024 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments
1025 else {
1026 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1027 result_feature_mask);
1028 assert(fingerprint, "Fingerprint should not be 0");
1029 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1030 while ( 1 ) {
1031 switch ( fingerprint & parameter_feature_mask ) {
1032 case bool_parm:
1033 get_bool();
1034 break;
1035 case char_parm:
1036 get_char();
1037 break;
1038 case short_parm:
1039 get_short();
1040 break;
1041 case byte_parm:
1042 get_byte();
1043 break;
1044 case int_parm:
1045 get_int();
1046 break;
1047 case obj_parm:
1048 get_object();
1049 break;
1050 case long_parm:
1051 get_long();
1052 break;
1053 case float_parm:
1054 get_float();
1055 break;
1056 case double_parm:
1057 get_double();
1058 break;
1059 case done_parm:
1060 return;
1061 break;
1062 default:
1063 ShouldNotReachHere();
1064 break;
1065 }
1066 fingerprint >>= parameter_feature_size;
1067 }
1068 }
1069 }
1070 };
1071
1072
1073 enum JNICallType {
1074 JNI_STATIC,
1075 JNI_VIRTUAL,
1076 JNI_NONVIRTUAL
1077 };
1078
1079
1080
1081 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1082 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1083
1084 // Create object to hold arguments for the JavaCall, and associate it with
1085 // the jni parser
1086 ResourceMark rm(THREAD);
1087 int number_of_parameters = method->size_of_parameters();
1088 JavaCallArguments java_args(number_of_parameters);
1089 args->set_java_argument_object(&java_args);
1090
1091 assert(method->is_static(), "method should be static");
1092
1093 // Fill out JavaCallArguments object
1094 args->iterate( Fingerprinter(method).fingerprint() );
1095 // Initialize result type
1096 result->set_type(args->get_ret_type());
1097
1098 // Invoke the method. Result is returned as oop.
1099 JavaCalls::call(result, method, &java_args, CHECK);
1100
1101 // Convert result
1102 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1103 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1104 }
1105 }
1106
1107
1108 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1109 oop recv = JNIHandles::resolve(receiver);
1110 if (recv == NULL) {
1111 THROW(vmSymbols::java_lang_NullPointerException());
1112 }
1113 Handle h_recv(THREAD, recv);
1114
1115 int number_of_parameters;
1116 Method* selected_method;
1117 {
1118 Method* m = Method::resolve_jmethod_id(method_id);
1119 number_of_parameters = m->size_of_parameters();
1120 Klass* holder = m->method_holder();
1121 if (!(holder)->is_interface()) {
1122 // non-interface call -- for that little speed boost, don't handlize
1123 debug_only(No_Safepoint_Verifier nosafepoint;)
1124 if (call_type == JNI_VIRTUAL) {
1125 // jni_GetMethodID makes sure class is linked and initialized
1126 // so m should have a valid vtable index.
1127 assert(!m->has_itable_index(), "");
1128 int vtbl_index = m->vtable_index();
1129 if (vtbl_index != Method::nonvirtual_vtable_index) {
1130 Klass* k = h_recv->klass();
1131 // k might be an arrayKlassOop but all vtables start at
1132 // the same place. The cast is to avoid virtual call and assertion.
1133 InstanceKlass *ik = (InstanceKlass*)k;
1134 selected_method = ik->method_at_vtable(vtbl_index);
1135 } else {
1136 // final method
1137 selected_method = m;
1138 }
1139 } else {
1140 // JNI_NONVIRTUAL call
1141 selected_method = m;
1142 }
1143 } else {
1144 // interface call
1145 KlassHandle h_holder(THREAD, holder);
1146
1147 if (call_type == JNI_VIRTUAL) {
1148 int itbl_index = m->itable_index();
1149 Klass* k = h_recv->klass();
1150 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1151 } else {
1152 selected_method = m;
1153 }
1154 }
1155 }
1156
1157 methodHandle method(THREAD, selected_method);
1158
1159 // Create object to hold arguments for the JavaCall, and associate it with
1160 // the jni parser
1161 ResourceMark rm(THREAD);
1162 JavaCallArguments java_args(number_of_parameters);
1163 args->set_java_argument_object(&java_args);
1164
1165 // handle arguments
1166 assert(!method->is_static(), "method should not be static");
1167 args->push_receiver(h_recv); // Push jobject handle
1168
1169 // Fill out JavaCallArguments object
1170 args->iterate( Fingerprinter(method).fingerprint() );
1171 // Initialize result type
1172 result->set_type(args->get_ret_type());
1173
1174 // Invoke the method. Result is returned as oop.
1175 JavaCalls::call(result, method, &java_args, CHECK);
1176
1177 // Convert result
1178 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1179 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1180 }
1181 }
1182
1183
1184 static instanceOop alloc_object(jclass clazz, TRAPS) {
1185 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1186 if (k == NULL) {
1187 ResourceMark rm(THREAD);
1188 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1189 }
1190 k()->check_valid_for_instantiation(false, CHECK_NULL);
1191 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1192 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1193 return ih;
1194 }
1195
1196 DT_RETURN_MARK_DECL(AllocObject, jobject
1197 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1198
1199 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1200 JNIWrapper("AllocObject");
1201
1202 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1203
1204 jobject ret = NULL;
1205 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1206
1207 instanceOop i = alloc_object(clazz, CHECK_NULL);
1208 ret = JNIHandles::make_local(env, i);
1209 return ret;
1210 JNI_END
1211
1212 DT_RETURN_MARK_DECL(NewObjectA, jobject
1213 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1214
1215 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1216 JNIWrapper("NewObjectA");
1217
1218 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1219
1220 jobject obj = NULL;
1221 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1222
1223 instanceOop i = alloc_object(clazz, CHECK_NULL);
1224 obj = JNIHandles::make_local(env, i);
1225 JavaValue jvalue(T_VOID);
1226 JNI_ArgumentPusherArray ap(methodID, args);
1227 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1228 return obj;
1229 JNI_END
1230
1231
1232 DT_RETURN_MARK_DECL(NewObjectV, jobject
1233 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1234
1235 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1236 JNIWrapper("NewObjectV");
1237
1238 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1239
1240 jobject obj = NULL;
1241 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1242
1243 instanceOop i = alloc_object(clazz, CHECK_NULL);
1244 obj = JNIHandles::make_local(env, i);
1245 JavaValue jvalue(T_VOID);
1246 JNI_ArgumentPusherVaArg ap(methodID, args);
1247 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1248 return obj;
1249 JNI_END
1250
1251
1252 DT_RETURN_MARK_DECL(NewObject, jobject
1253 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1254
1255 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1256 JNIWrapper("NewObject");
1257
1258 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1259
1260 jobject obj = NULL;
1261 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1262
1263 instanceOop i = alloc_object(clazz, CHECK_NULL);
1264 obj = JNIHandles::make_local(env, i);
1265 va_list args;
1266 va_start(args, methodID);
1267 JavaValue jvalue(T_VOID);
1268 JNI_ArgumentPusherVaArg ap(methodID, args);
1269 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1270 va_end(args);
1271 return obj;
1272 JNI_END
1273
1274
1275 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1276 JNIWrapper("GetObjectClass");
1277
1278 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1279
1280 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1281 jclass ret =
1282 (jclass) JNIHandles::make_local(env, k->java_mirror());
1283
1284 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1285 return ret;
1286 JNI_END
1287
1288 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1289 JNIWrapper("IsInstanceOf");
1290
1291 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1292
1293 jboolean ret = JNI_TRUE;
1294 if (obj != NULL) {
1295 ret = JNI_FALSE;
1296 Klass* k = java_lang_Class::as_Klass(
1297 JNIHandles::resolve_non_null(clazz));
1298 if (k != NULL) {
1299 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1300 }
1301 }
1302
1303 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1304 return ret;
1305 JNI_END
1306
1307
1308 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1309 const char *sig, bool is_static, TRAPS) {
1310 // %%%% This code should probably just call into a method in the LinkResolver
1311 //
1312 // The class should have been loaded (we have an instance of the class
1313 // passed in) so the method and signature should already be in the symbol
1314 // table. If they're not there, the method doesn't exist.
1315 const char *name_to_probe = (name_str == NULL)
1316 ? vmSymbols::object_initializer_name()->as_C_string()
1317 : name_str;
1318 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1319 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1320
1321 if (name == NULL || signature == NULL) {
1322 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1323 }
1324
1325 // Throw a NoSuchMethodError exception if we have an instance of a
1326 // primitive java.lang.Class
1327 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1328 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1329 }
1330
1331 KlassHandle klass(THREAD,
1332 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1333
1334 // Make sure class is linked and initialized before handing id's out to
1335 // Method*s.
1336 klass()->initialize(CHECK_NULL);
1337
1338 Method* m;
1339 if (name == vmSymbols::object_initializer_name() ||
1340 name == vmSymbols::class_initializer_name()) {
1341 // Never search superclasses for constructors
1342 if (klass->oop_is_instance()) {
1343 m = InstanceKlass::cast(klass())->find_method(name, signature);
1344 } else {
1345 m = NULL;
1346 }
1347 } else {
1348 m = klass->lookup_method(name, signature);
1349 if (m == NULL && klass->oop_is_instance()) {
1350 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1351 }
1352 }
1353 if (m == NULL || (m->is_static() != is_static)) {
1354 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1355 }
1356 return m->jmethod_id();
1357 }
1358
1359
1360 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1361 const char *name, const char *sig))
1362 JNIWrapper("GetMethodID");
1363 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1364 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1365 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1366 return ret;
1367 JNI_END
1368
1369
1370 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1371 const char *name, const char *sig))
1372 JNIWrapper("GetStaticMethodID");
1373 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1374 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1375 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1376 return ret;
1377 JNI_END
1378
1379
1380
1381 //
1382 // Calling Methods
1383 //
1384
1385
1386 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1387 , EntryProbe, ReturnProbe) \
1388 \
1389 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1390 , ReturnProbe); \
1391 \
1392 JNI_ENTRY(ResultType, \
1393 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1394 JNIWrapper("Call" XSTR(Result) "Method"); \
1395 \
1396 EntryProbe; \
1397 ResultType ret = 0;\
1398 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1399 (const ResultType&)ret);\
1400 \
1401 va_list args; \
1402 va_start(args, methodID); \
1403 JavaValue jvalue(Tag); \
1404 JNI_ArgumentPusherVaArg ap(methodID, args); \
1405 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1406 va_end(args); \
1407 ret = jvalue.get_##ResultType(); \
1408 return ret;\
1409 JNI_END
1410
1411 // the runtime type of subword integral basic types is integer
1412 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1413 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1414 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1415 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1416 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1417 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1418 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1419 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1420 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1421 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1422 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1424
1425 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1426 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jint, Int, T_INT,
1429 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1431 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1432 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1434 // Float and double probes don't return value because dtrace doesn't currently support it
1435 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1436 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1438 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1439 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1441
1442 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1443 , EntryProbe, ReturnProbe) \
1444 \
1445 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1446 , ReturnProbe); \
1447 \
1448 JNI_ENTRY(ResultType, \
1449 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1450 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1451 \
1452 EntryProbe;\
1453 ResultType ret = 0;\
1454 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1455 (const ResultType&)ret);\
1456 \
1457 JavaValue jvalue(Tag); \
1458 JNI_ArgumentPusherVaArg ap(methodID, args); \
1459 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1460 ret = jvalue.get_##ResultType(); \
1461 return ret;\
1462 JNI_END
1463
1464 // the runtime type of subword integral basic types is integer
1465 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1466 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1467 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1468 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1469 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1470 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1471 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1472 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1474 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1475 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1477
1478 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1479 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jint, Int, T_INT,
1482 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1485 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1487 // Float and double probes don't return value because dtrace doesn't currently support it
1488 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1489 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1491 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1492 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1494
1495 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1496 , EntryProbe, ReturnProbe) \
1497 \
1498 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1499 , ReturnProbe); \
1500 \
1501 JNI_ENTRY(ResultType, \
1502 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1503 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1504 EntryProbe; \
1505 ResultType ret = 0;\
1506 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1507 (const ResultType&)ret);\
1508 \
1509 JavaValue jvalue(Tag); \
1510 JNI_ArgumentPusherArray ap(methodID, args); \
1511 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1512 ret = jvalue.get_##ResultType(); \
1513 return ret;\
1514 JNI_END
1515
1516 // the runtime type of subword integral basic types is integer
1517 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1518 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1519 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1520 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1521 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1522 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1523 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1524 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1526 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1527 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1529
1530 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1531 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jint, Int, T_INT,
1534 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1537 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1539 // Float and double probes don't return value because dtrace doesn't currently support it
1540 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1541 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1543 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1544 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1546
1547 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1548 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1549 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1550
1551
1552 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1553 JNIWrapper("CallVoidMethod");
1554 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1555 DT_VOID_RETURN_MARK(CallVoidMethod);
1556
1557 va_list args;
1558 va_start(args, methodID);
1559 JavaValue jvalue(T_VOID);
1560 JNI_ArgumentPusherVaArg ap(methodID, args);
1561 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1562 va_end(args);
1563 JNI_END
1564
1565
1566 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1567 JNIWrapper("CallVoidMethodV");
1568 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1569 DT_VOID_RETURN_MARK(CallVoidMethodV);
1570
1571 JavaValue jvalue(T_VOID);
1572 JNI_ArgumentPusherVaArg ap(methodID, args);
1573 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1574 JNI_END
1575
1576
1577 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1578 JNIWrapper("CallVoidMethodA");
1579 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1580 DT_VOID_RETURN_MARK(CallVoidMethodA);
1581
1582 JavaValue jvalue(T_VOID);
1583 JNI_ArgumentPusherArray ap(methodID, args);
1584 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1585 JNI_END
1586
1587
1588
1589 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1590 , EntryProbe, ReturnProbe) \
1591 \
1592 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1593 , ReturnProbe);\
1594 \
1595 JNI_ENTRY(ResultType, \
1596 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1597 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1598 \
1599 EntryProbe;\
1600 ResultType ret;\
1601 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1602 (const ResultType&)ret);\
1603 \
1604 va_list args; \
1605 va_start(args, methodID); \
1606 JavaValue jvalue(Tag); \
1607 JNI_ArgumentPusherVaArg ap(methodID, args); \
1608 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1609 va_end(args); \
1610 ret = jvalue.get_##ResultType(); \
1611 return ret;\
1612 JNI_END
1613
1614 // the runtime type of subword integral basic types is integer
1615 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1616 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1617 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1618 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1619 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1620 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1621 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1622 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1624 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1625 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1627
1628 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1629 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1632 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1635 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 // Float and double probes don't return value because dtrace doesn't currently support it
1637 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1639 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1641 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1642 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1644
1645 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1646 , EntryProbe, ReturnProbe) \
1647 \
1648 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1649 , ReturnProbe);\
1650 \
1651 JNI_ENTRY(ResultType, \
1652 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1653 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1654 \
1655 EntryProbe;\
1656 ResultType ret;\
1657 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1658 (const ResultType&)ret);\
1659 \
1660 JavaValue jvalue(Tag); \
1661 JNI_ArgumentPusherVaArg ap(methodID, args); \
1662 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1663 ret = jvalue.get_##ResultType(); \
1664 return ret;\
1665 JNI_END
1666
1667 // the runtime type of subword integral basic types is integer
1668 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1669 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1670 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1671 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1672 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1673 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1674 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1675 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1677 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1678 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1680
1681 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1682 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1685 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1688 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 // Float and double probes don't return value because dtrace doesn't currently support it
1690 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1692 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1694 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1695 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1697
1698 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1699 , EntryProbe, ReturnProbe) \
1700 \
1701 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1702 , ReturnProbe);\
1703 \
1704 JNI_ENTRY(ResultType, \
1705 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1706 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1707 \
1708 EntryProbe;\
1709 ResultType ret;\
1710 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1711 (const ResultType&)ret);\
1712 \
1713 JavaValue jvalue(Tag); \
1714 JNI_ArgumentPusherArray ap(methodID, args); \
1715 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1716 ret = jvalue.get_##ResultType(); \
1717 return ret;\
1718 JNI_END
1719
1720 // the runtime type of subword integral basic types is integer
1721 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1722 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1723 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1724 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1725 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1726 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1727 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1728 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1730 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1731 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1733
1734 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1735 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1738 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1741 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 // Float and double probes don't return value because dtrace doesn't currently support it
1743 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1745 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1747 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1748 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1750
1751 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1752 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1753 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1754 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1755 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1756 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1757
1758 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1759 JNIWrapper("CallNonvirtualVoidMethod");
1760
1761 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1762 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1763
1764 va_list args;
1765 va_start(args, methodID);
1766 JavaValue jvalue(T_VOID);
1767 JNI_ArgumentPusherVaArg ap(methodID, args);
1768 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1769 va_end(args);
1770 JNI_END
1771
1772
1773 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1774 JNIWrapper("CallNonvirtualVoidMethodV");
1775
1776 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1777 env, obj, cls, (uintptr_t) methodID);
1778 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1779
1780 JavaValue jvalue(T_VOID);
1781 JNI_ArgumentPusherVaArg ap(methodID, args);
1782 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1783 JNI_END
1784
1785
1786 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1787 JNIWrapper("CallNonvirtualVoidMethodA");
1788 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1789 env, obj, cls, (uintptr_t) methodID);
1790 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1791 JavaValue jvalue(T_VOID);
1792 JNI_ArgumentPusherArray ap(methodID, args);
1793 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1794 JNI_END
1795
1796
1797
1798 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1799 , EntryProbe, ResultProbe) \
1800 \
1801 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1802 , ResultProbe); \
1803 \
1804 JNI_ENTRY(ResultType, \
1805 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1806 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1807 \
1808 EntryProbe; \
1809 ResultType ret = 0;\
1810 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1811 (const ResultType&)ret);\
1812 \
1813 va_list args; \
1814 va_start(args, methodID); \
1815 JavaValue jvalue(Tag); \
1816 JNI_ArgumentPusherVaArg ap(methodID, args); \
1817 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1818 va_end(args); \
1819 ret = jvalue.get_##ResultType(); \
1820 return ret;\
1821 JNI_END
1822
1823 // the runtime type of subword integral basic types is integer
1824 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1825 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1826 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1827 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1828 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1829 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1830 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1831 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1832 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1833 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1834 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1836
1837 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1838 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1841 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1843 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1844 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1846 // Float and double probes don't return value because dtrace doesn't currently support it
1847 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1848 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1850 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1851 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1853
1854 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1855 , EntryProbe, ResultProbe) \
1856 \
1857 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1858 , ResultProbe); \
1859 \
1860 JNI_ENTRY(ResultType, \
1861 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1862 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1863 \
1864 EntryProbe; \
1865 ResultType ret = 0;\
1866 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1867 (const ResultType&)ret);\
1868 \
1869 JavaValue jvalue(Tag); \
1870 JNI_ArgumentPusherVaArg ap(methodID, args); \
1871 /* Make sure class is initialized before trying to invoke its method */ \
1872 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1873 k()->initialize(CHECK_0); \
1874 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1875 va_end(args); \
1876 ret = jvalue.get_##ResultType(); \
1877 return ret;\
1878 JNI_END
1879
1880 // the runtime type of subword integral basic types is integer
1881 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1882 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1883 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1884 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1885 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1886 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1887 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1888 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1889 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1890 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1891 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1893
1894 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1895 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1898 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1900 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1901 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1903 // Float and double probes don't return value because dtrace doesn't currently support it
1904 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1905 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1907 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1908 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1910
1911 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1912 , EntryProbe, ResultProbe) \
1913 \
1914 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1915 , ResultProbe); \
1916 \
1917 JNI_ENTRY(ResultType, \
1918 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1919 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1920 \
1921 EntryProbe; \
1922 ResultType ret = 0;\
1923 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1924 (const ResultType&)ret);\
1925 \
1926 JavaValue jvalue(Tag); \
1927 JNI_ArgumentPusherArray ap(methodID, args); \
1928 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1929 ret = jvalue.get_##ResultType(); \
1930 return ret;\
1931 JNI_END
1932
1933 // the runtime type of subword integral basic types is integer
1934 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1935 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1936 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1937 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1938 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1939 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1940 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1941 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1942 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1943 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1944 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1946
1947 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1948 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1951 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1954 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1956 // Float and double probes don't return value because dtrace doesn't currently support it
1957 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1958 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1960 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1961 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1963
1964 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1965 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1966 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1967 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1968 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1969 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1970
1971 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1972 JNIWrapper("CallStaticVoidMethod");
1973 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1974 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1975
1976 va_list args;
1977 va_start(args, methodID);
1978 JavaValue jvalue(T_VOID);
1979 JNI_ArgumentPusherVaArg ap(methodID, args);
1980 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1981 va_end(args);
1982 JNI_END
1983
1984
1985 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1986 JNIWrapper("CallStaticVoidMethodV");
1987 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1988 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1989
1990 JavaValue jvalue(T_VOID);
1991 JNI_ArgumentPusherVaArg ap(methodID, args);
1992 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1993 JNI_END
1994
1995
1996 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1997 JNIWrapper("CallStaticVoidMethodA");
1998 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1999 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2000
2001 JavaValue jvalue(T_VOID);
2002 JNI_ArgumentPusherArray ap(methodID, args);
2003 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2004 JNI_END
2005
2006
2007 //
2008 // Accessing Fields
2009 //
2010
2011
2012 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2013 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2014
2015 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2016 const char *name, const char *sig))
2017 JNIWrapper("GetFieldID");
2018 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2019 jfieldID ret = 0;
2020 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2021
2022 // The class should have been loaded (we have an instance of the class
2023 // passed in) so the field and signature should already be in the symbol
2024 // table. If they're not there, the field doesn't exist.
2025 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2026 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2027 if (fieldname == NULL || signame == NULL) {
2028 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2029 }
2030 KlassHandle k(THREAD,
2031 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2032 // Make sure class is initialized before handing id's out to fields
2033 k()->initialize(CHECK_NULL);
2034
2035 fieldDescriptor fd;
2036 if (!k()->oop_is_instance() ||
2037 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2039 }
2040
2041 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2042 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2043 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2044 return ret;
2045 JNI_END
2046
2047
2048 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2049 JNIWrapper("GetObjectField");
2050 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2051 oop o = JNIHandles::resolve_non_null(obj);
2052 Klass* k = o->klass();
2053 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2054 // Keep JVMTI addition small and only check enabled flag here.
2055 // jni_GetField_probe() assumes that is okay to create handles.
2056 if (JvmtiExport::should_post_field_access()) {
2057 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2058 }
2059 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2060 #if INCLUDE_ALL_GCS
2061 // If G1 is enabled and we are accessing the value of the referent
2062 // field in a reference object then we need to register a non-null
2063 // referent with the SATB barrier.
2064 if (UseG1GC) {
2065 bool needs_barrier = false;
2066
2067 if (ret != NULL &&
2068 offset == java_lang_ref_Reference::referent_offset &&
2069 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2070 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2071 needs_barrier = true;
2072 }
2073
2074 if (needs_barrier) {
2075 oop referent = JNIHandles::resolve(ret);
2076 G1SATBCardTableModRefBS::enqueue(referent);
2077 }
2078 }
2079 #endif // INCLUDE_ALL_GCS
2080 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2081 return ret;
2082 JNI_END
2083
2084
2085
2086 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2087 , EntryProbe, ReturnProbe) \
2088 \
2089 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2090 , ReturnProbe); \
2091 \
2092 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2093 JNIWrapper("Get" XSTR(Result) "Field"); \
2094 \
2095 EntryProbe; \
2096 Return ret = 0;\
2097 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2098 \
2099 oop o = JNIHandles::resolve_non_null(obj); \
2100 Klass* k = o->klass(); \
2101 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2102 /* Keep JVMTI addition small and only check enabled flag here. */ \
2103 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2104 /* and creates a ResetNoHandleMark. */ \
2105 if (JvmtiExport::should_post_field_access()) { \
2106 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2107 } \
2108 ret = o->Fieldname##_field(offset); \
2109 return ret; \
2110 JNI_END
2111
2112 DEFINE_GETFIELD(jboolean, bool, Boolean
2113 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2114 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2115 DEFINE_GETFIELD(jbyte, byte, Byte
2116 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2117 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2118 DEFINE_GETFIELD(jchar, char, Char
2119 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2120 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2121 DEFINE_GETFIELD(jshort, short, Short
2122 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2124 DEFINE_GETFIELD(jint, int, Int
2125 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2127 DEFINE_GETFIELD(jlong, long, Long
2128 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2130 // Float and double probes don't return value because dtrace doesn't currently support it
2131 DEFINE_GETFIELD(jfloat, float, Float
2132 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2134 DEFINE_GETFIELD(jdouble, double, Double
2135 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2137
2138 address jni_GetBooleanField_addr() {
2139 return (address)jni_GetBooleanField;
2140 }
2141 address jni_GetByteField_addr() {
2142 return (address)jni_GetByteField;
2143 }
2144 address jni_GetCharField_addr() {
2145 return (address)jni_GetCharField;
2146 }
2147 address jni_GetShortField_addr() {
2148 return (address)jni_GetShortField;
2149 }
2150 address jni_GetIntField_addr() {
2151 return (address)jni_GetIntField;
2152 }
2153 address jni_GetLongField_addr() {
2154 return (address)jni_GetLongField;
2155 }
2156 address jni_GetFloatField_addr() {
2157 return (address)jni_GetFloatField;
2158 }
2159 address jni_GetDoubleField_addr() {
2160 return (address)jni_GetDoubleField;
2161 }
2162
2163 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2164 JNIWrapper("SetObjectField");
2165 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2166 oop o = JNIHandles::resolve_non_null(obj);
2167 Klass* k = o->klass();
2168 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2169 // Keep JVMTI addition small and only check enabled flag here.
2170 // jni_SetField_probe_nh() assumes that is not okay to create handles
2171 // and creates a ResetNoHandleMark.
2172 if (JvmtiExport::should_post_field_modification()) {
2173 jvalue field_value;
2174 field_value.l = value;
2175 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2176 }
2177 o->obj_field_put(offset, JNIHandles::resolve(value));
2178 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2179 JNI_END
2180
2181
2182 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2183 , EntryProbe, ReturnProbe) \
2184 \
2185 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2186 JNIWrapper("Set" XSTR(Result) "Field"); \
2187 \
2188 EntryProbe; \
2189 \
2190 oop o = JNIHandles::resolve_non_null(obj); \
2191 Klass* k = o->klass(); \
2192 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2193 /* Keep JVMTI addition small and only check enabled flag here. */ \
2194 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2195 /* and creates a ResetNoHandleMark. */ \
2196 if (JvmtiExport::should_post_field_modification()) { \
2197 jvalue field_value; \
2198 field_value.unionType = value; \
2199 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2200 } \
2201 o->Fieldname##_field_put(offset, value); \
2202 ReturnProbe; \
2203 JNI_END
2204
2205 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2206 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2207 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2208 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2209 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2210 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2211 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2212 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2213 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2214 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2215 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2216 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2217 DEFINE_SETFIELD(jint, int, Int, 'I', i
2218 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2219 HOTSPOT_JNI_SETINTFIELD_RETURN())
2220 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2221 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2222 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2223 // Float and double probes don't return value because dtrace doesn't currently support it
2224 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2225 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2226 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2227 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2228 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2229 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2230
2231 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2232 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2233
2234 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2235 JNIWrapper("ToReflectedField");
2236 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2237 jobject ret = NULL;
2238 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2239
2240 fieldDescriptor fd;
2241 bool found = false;
2242 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2243
2244 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2245
2246 if (isStatic) {
2247 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2248 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2249 assert(id->is_static_field_id(), "invalid static field id");
2250 found = id->find_local_field(&fd);
2251 } else {
2252 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2253 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2254 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2255 }
2256 assert(found, "bad fieldID passed into jni_ToReflectedField");
2257 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2258 ret = JNIHandles::make_local(env, reflected);
2259 return ret;
2260 JNI_END
2261
2262
2263 //
2264 // Accessing Static Fields
2265 //
2266 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2267 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2268
2269 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2270 const char *name, const char *sig))
2271 JNIWrapper("GetStaticFieldID");
2272 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2273 jfieldID ret = NULL;
2274 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2275
2276 // The class should have been loaded (we have an instance of the class
2277 // passed in) so the field and signature should already be in the symbol
2278 // table. If they're not there, the field doesn't exist.
2279 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2280 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2281 if (fieldname == NULL || signame == NULL) {
2282 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2283 }
2284 KlassHandle k(THREAD,
2285 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2286 // Make sure class is initialized before handing id's out to static fields
2287 k()->initialize(CHECK_NULL);
2288
2289 fieldDescriptor fd;
2290 if (!k()->oop_is_instance() ||
2291 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2292 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2293 }
2294
2295 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2296 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2297 debug_only(id->set_is_static_field_id();)
2298
2299 debug_only(id->verify(fd.field_holder()));
2300
2301 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2302 return ret;
2303 JNI_END
2304
2305
2306 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2307 JNIWrapper("GetStaticObjectField");
2308 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2309 #if INCLUDE_JNI_CHECK
2310 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2311 #endif // INCLUDE_JNI_CHECK
2312 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2313 assert(id->is_static_field_id(), "invalid static field id");
2314 // Keep JVMTI addition small and only check enabled flag here.
2315 // jni_GetField_probe() assumes that is okay to create handles.
2316 if (JvmtiExport::should_post_field_access()) {
2317 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2318 }
2319 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2320 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2321 return ret;
2322 JNI_END
2323
2324
2325 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2326 , EntryProbe, ReturnProbe) \
2327 \
2328 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2329 , ReturnProbe); \
2330 \
2331 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2332 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2333 EntryProbe; \
2334 Return ret = 0;\
2335 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2336 (const Return&)ret);\
2337 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2338 assert(id->is_static_field_id(), "invalid static field id"); \
2339 /* Keep JVMTI addition small and only check enabled flag here. */ \
2340 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2341 if (JvmtiExport::should_post_field_access()) { \
2342 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2343 } \
2344 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2345 return ret;\
2346 JNI_END
2347
2348 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2349 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2350 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2351 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2352 DEFINE_GETSTATICFIELD(jchar, char, Char
2353 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2354 DEFINE_GETSTATICFIELD(jshort, short, Short
2355 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2356 DEFINE_GETSTATICFIELD(jint, int, Int
2357 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2358 DEFINE_GETSTATICFIELD(jlong, long, Long
2359 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2360 // Float and double probes don't return value because dtrace doesn't currently support it
2361 DEFINE_GETSTATICFIELD(jfloat, float, Float
2362 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2363 DEFINE_GETSTATICFIELD(jdouble, double, Double
2364 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2365
2366 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2367 JNIWrapper("SetStaticObjectField");
2368 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2369 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2370 assert(id->is_static_field_id(), "invalid static field id");
2371 // Keep JVMTI addition small and only check enabled flag here.
2372 // jni_SetField_probe() assumes that is okay to create handles.
2373 if (JvmtiExport::should_post_field_modification()) {
2374 jvalue field_value;
2375 field_value.l = value;
2376 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2377 }
2378 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2379 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2380 JNI_END
2381
2382
2383
2384 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2385 , EntryProbe, ReturnProbe) \
2386 \
2387 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2388 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2389 EntryProbe; \
2390 \
2391 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2392 assert(id->is_static_field_id(), "invalid static field id"); \
2393 /* Keep JVMTI addition small and only check enabled flag here. */ \
2394 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2395 if (JvmtiExport::should_post_field_modification()) { \
2396 jvalue field_value; \
2397 field_value.unionType = value; \
2398 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2399 } \
2400 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2401 ReturnProbe;\
2402 JNI_END
2403
2404 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2405 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2406 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2407 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2408 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2409 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2410 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2411 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2412 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2413 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2414 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2415 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2416 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2417 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2418 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2419 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2420 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2421 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2422 // Float and double probes don't return value because dtrace doesn't currently support it
2423 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2424 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2425 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2426 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2427 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2428 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2429
2430 //
2431 // String Operations
2432 //
2433
2434 // Unicode Interface
2435
2436 DT_RETURN_MARK_DECL(NewString, jstring
2437 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2438
2439 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2440 JNIWrapper("NewString");
2441 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2442 jstring ret = NULL;
2443 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2444 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2445 ret = (jstring) JNIHandles::make_local(env, string);
2446 return ret;
2447 JNI_END
2448
2449
2450 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2451 JNIWrapper("GetStringLength");
2452 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2453 jsize ret = 0;
2454 oop s = JNIHandles::resolve_non_null(string);
2455 if (java_lang_String::value(s) != NULL) {
2456 ret = java_lang_String::length(s);
2457 }
2458 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2459 return ret;
2460 JNI_END
2461
2462
2463 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2464 JNIEnv *env, jstring string, jboolean *isCopy))
2465 JNIWrapper("GetStringChars");
2466 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2467 jchar* buf = NULL;
2468 oop s = JNIHandles::resolve_non_null(string);
2469 typeArrayOop s_value = java_lang_String::value(s);
2470 if (s_value != NULL) {
2471 int s_len = java_lang_String::length(s);
2472 int s_offset = java_lang_String::offset(s);
2473 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2474 /* JNI Specification states return NULL on OOM */
2475 if (buf != NULL) {
2476 if (s_len > 0) {
2477 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2478 }
2479 buf[s_len] = 0;
2480 //%note jni_5
2481 if (isCopy != NULL) {
2482 *isCopy = JNI_TRUE;
2483 }
2484 }
2485 }
2486 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2487 return buf;
2488 JNI_END
2489
2490
2491 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2492 JNIWrapper("ReleaseStringChars");
2493 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2494 //%note jni_6
2495 if (chars != NULL) {
2496 // Since String objects are supposed to be immutable, don't copy any
2497 // new data back. A bad user will have to go after the char array.
2498 FreeHeap((void*) chars);
2499 }
2500 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2501 JNI_END
2502
2503
2504 // UTF Interface
2505
2506 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2507 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2508
2509 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2510 JNIWrapper("NewStringUTF");
2511 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2512 jstring ret;
2513 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2514
2515 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2516 ret = (jstring) JNIHandles::make_local(env, result);
2517 return ret;
2518 JNI_END
2519
2520
2521 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2522 JNIWrapper("GetStringUTFLength");
2523 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2524 jsize ret = 0;
2525 oop java_string = JNIHandles::resolve_non_null(string);
2526 if (java_lang_String::value(java_string) != NULL) {
2527 ret = java_lang_String::utf8_length(java_string);
2528 }
2529 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2530 return ret;
2531 JNI_END
2532
2533
2534 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2535 JNIWrapper("GetStringUTFChars");
2536 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2537 char* result = NULL;
2538 oop java_string = JNIHandles::resolve_non_null(string);
2539 if (java_lang_String::value(java_string) != NULL) {
2540 size_t length = java_lang_String::utf8_length(java_string);
2541 /* JNI Specification states return NULL on OOM */
2542 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2543 if (result != NULL) {
2544 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2545 if (isCopy != NULL) {
2546 *isCopy = JNI_TRUE;
2547 }
2548 }
2549 }
2550 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2551 return result;
2552 JNI_END
2553
2554
2555 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2556 JNIWrapper("ReleaseStringUTFChars");
2557 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2558 if (chars != NULL) {
2559 FreeHeap((char*) chars);
2560 }
2561 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2562 JNI_END
2563
2564
2565 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2566 JNIWrapper("GetArrayLength");
2567 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2568 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2569 assert(a->is_array(), "must be array");
2570 jsize ret = a->length();
2571 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2572 return ret;
2573 JNI_END
2574
2575
2576 //
2577 // Object Array Operations
2578 //
2579
2580 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2581 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2582
2583 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2584 JNIWrapper("NewObjectArray");
2585 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2586 jobjectArray ret = NULL;
2587 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2588 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2589 Klass* ako = ek()->array_klass(CHECK_NULL);
2590 KlassHandle ak = KlassHandle(THREAD, ako);
2591 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2592 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2593 oop initial_value = JNIHandles::resolve(initialElement);
2594 if (initial_value != NULL) { // array already initialized with NULL
2595 for (int index = 0; index < length; index++) {
2596 result->obj_at_put(index, initial_value);
2597 }
2598 }
2599 ret = (jobjectArray) JNIHandles::make_local(env, result);
2600 return ret;
2601 JNI_END
2602
2603 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2604 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2605
2606 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2607 JNIWrapper("GetObjectArrayElement");
2608 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2609 jobject ret = NULL;
2610 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2611 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2612 if (a->is_within_bounds(index)) {
2613 ret = JNIHandles::make_local(env, a->obj_at(index));
2614 return ret;
2615 } else {
2616 char buf[jintAsStringSize];
2617 sprintf(buf, "%d", index);
2618 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2619 }
2620 JNI_END
2621
2622 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2623 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2624
2625 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2626 JNIWrapper("SetObjectArrayElement");
2627 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2628 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2629
2630 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2631 oop v = JNIHandles::resolve(value);
2632 if (a->is_within_bounds(index)) {
2633 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2634 a->obj_at_put(index, v);
2635 } else {
2636 THROW(vmSymbols::java_lang_ArrayStoreException());
2637 }
2638 } else {
2639 char buf[jintAsStringSize];
2640 sprintf(buf, "%d", index);
2641 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2642 }
2643 JNI_END
2644
2645
2646
2647 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2648 ,EntryProbe,ReturnProbe) \
2649 \
2650 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2651 , ReturnProbe); \
2652 \
2653 JNI_ENTRY(Return, \
2654 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2655 JNIWrapper("New" XSTR(Result) "Array"); \
2656 EntryProbe; \
2657 Return ret = NULL;\
2658 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2659 \
2660 oop obj= oopFactory::Allocator(len, CHECK_0); \
2661 ret = (Return) JNIHandles::make_local(env, obj); \
2662 return ret;\
2663 JNI_END
2664
2665 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2666 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2667 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2668 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2669 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2672 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2675 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2678 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2681 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2684 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2687 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2689
2690 // Return an address which will fault if the caller writes to it.
2691
2692 static char* get_bad_address() {
2693 static char* bad_address = NULL;
2694 if (bad_address == NULL) {
2695 size_t size = os::vm_allocation_granularity();
2696 bad_address = os::reserve_memory(size);
2697 if (bad_address != NULL) {
2698 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2699 /*is_committed*/false);
2700 }
2701 }
2702 return bad_address;
2703 }
2704
2705
2706
2707 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2708 , EntryProbe, ReturnProbe) \
2709 \
2710 JNI_QUICK_ENTRY(ElementType*, \
2711 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2712 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2713 EntryProbe; \
2714 /* allocate an chunk of memory in c land */ \
2715 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2716 ElementType* result; \
2717 int len = a->length(); \
2718 if (len == 0) { \
2719 /* Empty array: legal but useless, can't return NULL. \
2720 * Return a pointer to something useless. \
2721 * Avoid asserts in typeArrayOop. */ \
2722 result = (ElementType*)get_bad_address(); \
2723 } else { \
2724 /* JNI Specification states return NULL on OOM */ \
2725 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2726 if (result != NULL) { \
2727 /* copy the array to the c chunk */ \
2728 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2729 if (isCopy) { \
2730 *isCopy = JNI_TRUE; \
2731 } \
2732 } \
2733 } \
2734 ReturnProbe; \
2735 return result; \
2736 JNI_END
2737
2738 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2739 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2740 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2741 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2742 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2743 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2744 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2745 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2746 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2747 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2748 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2749 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2751 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2752 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2754 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2756 // Float and double probes don't return value because dtrace doesn't currently support it
2757 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2758 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2761 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2763
2764
2765 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2766 , EntryProbe, ReturnProbe);\
2767 \
2768 JNI_QUICK_ENTRY(void, \
2769 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2770 ElementType *buf, jint mode)) \
2771 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2772 EntryProbe; \
2773 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2774 int len = a->length(); \
2775 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2776 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2777 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2778 } \
2779 if ((mode == 0) || (mode == JNI_ABORT)) { \
2780 FreeHeap(buf); \
2781 } \
2782 } \
2783 ReturnProbe; \
2784 JNI_END
2785
2786 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2787 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2788 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2789 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2790 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2791 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2792 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2793 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2794 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2795 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2796 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2797 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2798 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2799 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2800 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2801 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2802 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2803 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2804 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2805 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2806 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2808 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2809 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2810
2811
2812 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2813 , EntryProbe, ReturnProbe); \
2814 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2815 , ReturnProbe); \
2816 \
2817 JNI_ENTRY(void, \
2818 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2819 jsize len, ElementType *buf)) \
2820 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2821 EntryProbe; \
2822 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2823 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2824 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2825 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2826 } else { \
2827 if (len > 0) { \
2828 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2829 memcpy((u_char*) buf, \
2830 (u_char*) src->Tag##_at_addr(start), \
2831 len << sc); \
2832 } \
2833 } \
2834 JNI_END
2835
2836 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2837 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2838 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2839 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2840 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2841 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2842 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2843 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2844 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2845 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2846 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2847 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2848 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2849 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2850 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2851 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2852 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2853 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2854 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2855 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2856 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2857 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2858 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2859 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2860
2861
2862 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2863 , EntryProbe, ReturnProbe); \
2864 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2865 ,ReturnProbe); \
2866 \
2867 JNI_ENTRY(void, \
2868 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2869 jsize len, const ElementType *buf)) \
2870 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2871 EntryProbe; \
2872 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2873 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2874 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2875 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2876 } else { \
2877 if (len > 0) { \
2878 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2879 memcpy((u_char*) dst->Tag##_at_addr(start), \
2880 (u_char*) buf, \
2881 len << sc); \
2882 } \
2883 } \
2884 JNI_END
2885
2886 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2887 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2888 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2889 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2890 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2891 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2892 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2893 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2894 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2895 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2896 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2897 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2898 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2899 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2900 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2902 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2903 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2905 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2906 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2908 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2909 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2910
2911
2912 //
2913 // Interception of natives
2914 //
2915
2916 // The RegisterNatives call being attempted tried to register with a method that
2917 // is not native. Ask JVM TI what prefixes have been specified. Then check
2918 // to see if the native method is now wrapped with the prefixes. See the
2919 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2920 static Method* find_prefixed_native(KlassHandle k,
2921 Symbol* name, Symbol* signature, TRAPS) {
2922 #if INCLUDE_JVMTI
2923 ResourceMark rm(THREAD);
2924 Method* method;
2925 int name_len = name->utf8_length();
2926 char* name_str = name->as_utf8();
2927 int prefix_count;
2928 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2929 for (int i = 0; i < prefix_count; i++) {
2930 char* prefix = prefixes[i];
2931 int prefix_len = (int)strlen(prefix);
2932
2933 // try adding this prefix to the method name and see if it matches another method name
2934 int trial_len = name_len + prefix_len;
2935 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2936 strcpy(trial_name_str, prefix);
2937 strcat(trial_name_str, name_str);
2938 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2939 if (trial_name == NULL) {
2940 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2941 }
2942 method = k()->lookup_method(trial_name, signature);
2943 if (method == NULL) {
2944 continue; // signature doesn't match, try the next prefix
2945 }
2946 if (method->is_native()) {
2947 method->set_is_prefixed_native();
2948 return method; // wahoo, we found a prefixed version of the method, return it
2949 }
2950 // found as non-native, so prefix is good, add it, probably just need more prefixes
2951 name_len = trial_len;
2952 name_str = trial_name_str;
2953 }
2954 #endif // INCLUDE_JVMTI
2955 return NULL; // not found
2956 }
2957
2958 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2959 Method* method = k()->lookup_method(name, signature);
2960 if (method == NULL) {
2961 ResourceMark rm;
2962 stringStream st;
2963 st.print("Method %s name or signature does not match",
2964 Method::name_and_sig_as_C_string(k(), name, signature));
2965 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2966 }
2967 if (!method->is_native()) {
2968 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2969 method = find_prefixed_native(k, name, signature, THREAD);
2970 if (method == NULL) {
2971 ResourceMark rm;
2972 stringStream st;
2973 st.print("Method %s is not declared as native",
2974 Method::name_and_sig_as_C_string(k(), name, signature));
2975 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2976 }
2977 }
2978
2979 if (entry != NULL) {
2980 method->set_native_function(entry,
2981 Method::native_bind_event_is_interesting);
2982 } else {
2983 method->clear_native_function();
2984 }
2985 if (PrintJNIResolving) {
2986 ResourceMark rm(THREAD);
2987 tty->print_cr("[Registering JNI native method %s.%s]",
2988 method->method_holder()->external_name(),
2989 method->name()->as_C_string());
2990 }
2991 return true;
2992 }
2993
2994 DT_RETURN_MARK_DECL(RegisterNatives, jint
2995 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2996
2997 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2998 const JNINativeMethod *methods,
2999 jint nMethods))
3000 JNIWrapper("RegisterNatives");
3001 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3002 jint ret = 0;
3003 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3004
3005 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3006
3007 for (int index = 0; index < nMethods; index++) {
3008 const char* meth_name = methods[index].name;
3009 const char* meth_sig = methods[index].signature;
3010 int meth_name_len = (int)strlen(meth_name);
3011
3012 // The class should have been loaded (we have an instance of the class
3013 // passed in) so the method and signature should already be in the symbol
3014 // table. If they're not there, the method doesn't exist.
3015 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3016 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3017
3018 if (name == NULL || signature == NULL) {
3019 ResourceMark rm;
3020 stringStream st;
3021 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3022 // Must return negative value on failure
3023 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3024 }
3025
3026 bool res = register_native(h_k, name, signature,
3027 (address) methods[index].fnPtr, THREAD);
3028 if (!res) {
3029 ret = -1;
3030 break;
3031 }
3032 }
3033 return ret;
3034 JNI_END
3035
3036
3037 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3038 JNIWrapper("UnregisterNatives");
3039 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3041 //%note jni_2
3042 if (k->oop_is_instance()) {
3043 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3044 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3045 if (m->is_native()) {
3046 m->clear_native_function();
3047 m->set_signature_handler(NULL);
3048 }
3049 }
3050 }
3051 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3052 return 0;
3053 JNI_END
3054
3055 //
3056 // Monitor functions
3057 //
3058
3059 DT_RETURN_MARK_DECL(MonitorEnter, jint
3060 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3061
3062 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3063 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3064 jint ret = JNI_ERR;
3065 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3066
3067 // If the object is null, we can't do anything with it
3068 if (jobj == NULL) {
3069 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3070 }
3071
3072 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3073 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3074 ret = JNI_OK;
3075 return ret;
3076 JNI_END
3077
3078 DT_RETURN_MARK_DECL(MonitorExit, jint
3079 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3080
3081 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3082 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3083 jint ret = JNI_ERR;
3084 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3085
3086 // Don't do anything with a null object
3087 if (jobj == NULL) {
3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3089 }
3090
3091 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3092 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3093
3094 ret = JNI_OK;
3095 return ret;
3096 JNI_END
3097
3098 //
3099 // Extensions
3100 //
3101
3102 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3103 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3104
3105 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3106 JNIWrapper("GetStringRegion");
3107 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3108 DT_VOID_RETURN_MARK(GetStringRegion);
3109 oop s = JNIHandles::resolve_non_null(string);
3110 int s_len = java_lang_String::length(s);
3111 if (start < 0 || len < 0 || start + len > s_len) {
3112 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3113 } else {
3114 if (len > 0) {
3115 int s_offset = java_lang_String::offset(s);
3116 typeArrayOop s_value = java_lang_String::value(s);
3117 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3118 }
3119 }
3120 JNI_END
3121
3122 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3123 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3124
3125 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3126 JNIWrapper("GetStringUTFRegion");
3127 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3128 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3129 oop s = JNIHandles::resolve_non_null(string);
3130 int s_len = java_lang_String::length(s);
3131 if (start < 0 || len < 0 || start + len > s_len) {
3132 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3133 } else {
3134 //%note jni_7
3135 if (len > 0) {
3136 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3137 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3138 // as_utf8_string null-terminates the result string
3139 } else {
3140 // JDK null-terminates the buffer even in len is zero
3141 if (buf != NULL) {
3142 buf[0] = 0;
3143 }
3144 }
3145 }
3146 JNI_END
3147
3148
3149 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3150 JNIWrapper("GetPrimitiveArrayCritical");
3151 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3152 GC_locker::lock_critical(thread);
3153 if (isCopy != NULL) {
3154 *isCopy = JNI_FALSE;
3155 }
3156 oop a = JNIHandles::resolve_non_null(array);
3157 assert(a->is_array(), "just checking");
3158 BasicType type;
3159 if (a->is_objArray()) {
3160 type = T_OBJECT;
3161 } else {
3162 type = TypeArrayKlass::cast(a->klass())->element_type();
3163 }
3164 void* ret = arrayOop(a)->base(type);
3165 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3166 return ret;
3167 JNI_END
3168
3169
3170 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3171 JNIWrapper("ReleasePrimitiveArrayCritical");
3172 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3173 // The array, carray and mode arguments are ignored
3174 GC_locker::unlock_critical(thread);
3175 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3176 JNI_END
3177
3178
3179 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3180 JNIWrapper("GetStringCritical");
3181 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3182 GC_locker::lock_critical(thread);
3183 if (isCopy != NULL) {
3184 *isCopy = JNI_FALSE;
3185 }
3186 oop s = JNIHandles::resolve_non_null(string);
3187 int s_len = java_lang_String::length(s);
3188 typeArrayOop s_value = java_lang_String::value(s);
3189 int s_offset = java_lang_String::offset(s);
3190 const jchar* ret;
3191 if (s_len > 0) {
3192 ret = s_value->char_at_addr(s_offset);
3193 } else {
3194 ret = (jchar*) s_value->base(T_CHAR);
3195 }
3196 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3197 return ret;
3198 JNI_END
3199
3200
3201 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3202 JNIWrapper("ReleaseStringCritical");
3203 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3204 // The str and chars arguments are ignored
3205 GC_locker::unlock_critical(thread);
3206 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3207 JNI_END
3208
3209
3210 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3211 JNIWrapper("jni_NewWeakGlobalRef");
3212 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3213 Handle ref_handle(thread, JNIHandles::resolve(ref));
3214 jweak ret = JNIHandles::make_weak_global(ref_handle);
3215 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3216 return ret;
3217 JNI_END
3218
3219 // Must be JNI_ENTRY (with HandleMark)
3220 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3221 JNIWrapper("jni_DeleteWeakGlobalRef");
3222 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3223 JNIHandles::destroy_weak_global(ref);
3224 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3225 JNI_END
3226
3227
3228 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3229 JNIWrapper("jni_ExceptionCheck");
3230 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3231 jni_check_async_exceptions(thread);
3232 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3233 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3234 return ret;
3235 JNI_END
3236
3237
3238 // Initialization state for three routines below relating to
3239 // java.nio.DirectBuffers
3240 static jint directBufferSupportInitializeStarted = 0;
3241 static volatile jint directBufferSupportInitializeEnded = 0;
3242 static volatile jint directBufferSupportInitializeFailed = 0;
3243 static jclass bufferClass = NULL;
3244 static jclass directBufferClass = NULL;
3245 static jclass directByteBufferClass = NULL;
3246 static jmethodID directByteBufferConstructor = NULL;
3247 static jfieldID directBufferAddressField = NULL;
3248 static jfieldID bufferCapacityField = NULL;
3249
3250 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3251 Handle loader; // null (bootstrap) loader
3252 Handle protection_domain; // null protection domain
3253
3254 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3255 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3256
3257 if (TraceClassResolution && result != NULL) {
3258 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3259 }
3260 return result;
3261 }
3262
3263 // These lookups are done with the NULL (bootstrap) ClassLoader to
3264 // circumvent any security checks that would be done by jni_FindClass.
3265 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3266 {
3267 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3268 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3269 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3270 return true;
3271 }
3272 JNI_END
3273
3274
3275 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3276 if (directBufferSupportInitializeFailed) {
3277 return false;
3278 }
3279
3280 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3281 if (!lookupDirectBufferClasses(env)) {
3282 directBufferSupportInitializeFailed = 1;
3283 return false;
3284 }
3285
3286 // Make global references for these
3287 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3288 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3289 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3290
3291 // Get needed field and method IDs
3292 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3293 if (env->ExceptionCheck()) {
3294 env->ExceptionClear();
3295 directBufferSupportInitializeFailed = 1;
3296 return false;
3297 }
3298 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3299 if (env->ExceptionCheck()) {
3300 env->ExceptionClear();
3301 directBufferSupportInitializeFailed = 1;
3302 return false;
3303 }
3304 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3305 if (env->ExceptionCheck()) {
3306 env->ExceptionClear();
3307 directBufferSupportInitializeFailed = 1;
3308 return false;
3309 }
3310
3311 if ((directByteBufferConstructor == NULL) ||
3312 (directBufferAddressField == NULL) ||
3313 (bufferCapacityField == NULL)) {
3314 directBufferSupportInitializeFailed = 1;
3315 return false;
3316 }
3317
3318 directBufferSupportInitializeEnded = 1;
3319 } else {
3320 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3321 os::naked_yield();
3322 }
3323 }
3324
3325 return !directBufferSupportInitializeFailed;
3326 }
3327
3328 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3329 {
3330 // thread_from_jni_environment() will block if VM is gone.
3331 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3332
3333 JNIWrapper("jni_NewDirectByteBuffer");
3334 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3335
3336 if (!directBufferSupportInitializeEnded) {
3337 if (!initializeDirectBufferSupport(env, thread)) {
3338 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3339 return NULL;
3340 }
3341 }
3342
3343 // Being paranoid about accidental sign extension on address
3344 jlong addr = (jlong) ((uintptr_t) address);
3345 // NOTE that package-private DirectByteBuffer constructor currently
3346 // takes int capacity
3347 jint cap = (jint) capacity;
3348 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3349 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3350 return ret;
3351 }
3352
3353 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3354 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3355
3356 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3357 {
3358 // thread_from_jni_environment() will block if VM is gone.
3359 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3360
3361 JNIWrapper("jni_GetDirectBufferAddress");
3362 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3363 void* ret = NULL;
3364 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3365
3366 if (!directBufferSupportInitializeEnded) {
3367 if (!initializeDirectBufferSupport(env, thread)) {
3368 return 0;
3369 }
3370 }
3371
3372 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3373 return 0;
3374 }
3375
3376 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3377 return ret;
3378 }
3379
3380 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3381 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3382
3383 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3384 {
3385 // thread_from_jni_environment() will block if VM is gone.
3386 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3387
3388 JNIWrapper("jni_GetDirectBufferCapacity");
3389 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3390 jlong ret = -1;
3391 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3392
3393 if (!directBufferSupportInitializeEnded) {
3394 if (!initializeDirectBufferSupport(env, thread)) {
3395 ret = 0;
3396 return ret;
3397 }
3398 }
3399
3400 if (buf == NULL) {
3401 return -1;
3402 }
3403
3404 if (!env->IsInstanceOf(buf, directBufferClass)) {
3405 return -1;
3406 }
3407
3408 // NOTE that capacity is currently an int in the implementation
3409 ret = env->GetIntField(buf, bufferCapacityField);
3410 return ret;
3411 }
3412
3413
3414 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3415 JNIWrapper("GetVersion");
3416 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3417 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3418 return CurrentVersion;
3419 JNI_END
3420
3421 extern struct JavaVM_ main_vm;
3422
3423 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3424 JNIWrapper("jni_GetJavaVM");
3425 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3426 *vm = (JavaVM *)(&main_vm);
3427 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3428 return JNI_OK;
3429 JNI_END
3430
3431 // Structure containing all jni functions
3432 struct JNINativeInterface_ jni_NativeInterface = {
3433 NULL,
3434 NULL,
3435 NULL,
3436
3437 NULL,
3438
3439 jni_GetVersion,
3440
3441 jni_DefineClass,
3442 jni_FindClass,
3443
3444 jni_FromReflectedMethod,
3445 jni_FromReflectedField,
3446
3447 jni_ToReflectedMethod,
3448
3449 jni_GetSuperclass,
3450 jni_IsAssignableFrom,
3451
3452 jni_ToReflectedField,
3453
3454 jni_Throw,
3455 jni_ThrowNew,
3456 jni_ExceptionOccurred,
3457 jni_ExceptionDescribe,
3458 jni_ExceptionClear,
3459 jni_FatalError,
3460
3461 jni_PushLocalFrame,
3462 jni_PopLocalFrame,
3463
3464 jni_NewGlobalRef,
3465 jni_DeleteGlobalRef,
3466 jni_DeleteLocalRef,
3467 jni_IsSameObject,
3468
3469 jni_NewLocalRef,
3470 jni_EnsureLocalCapacity,
3471
3472 jni_AllocObject,
3473 jni_NewObject,
3474 jni_NewObjectV,
3475 jni_NewObjectA,
3476
3477 jni_GetObjectClass,
3478 jni_IsInstanceOf,
3479
3480 jni_GetMethodID,
3481
3482 jni_CallObjectMethod,
3483 jni_CallObjectMethodV,
3484 jni_CallObjectMethodA,
3485 jni_CallBooleanMethod,
3486 jni_CallBooleanMethodV,
3487 jni_CallBooleanMethodA,
3488 jni_CallByteMethod,
3489 jni_CallByteMethodV,
3490 jni_CallByteMethodA,
3491 jni_CallCharMethod,
3492 jni_CallCharMethodV,
3493 jni_CallCharMethodA,
3494 jni_CallShortMethod,
3495 jni_CallShortMethodV,
3496 jni_CallShortMethodA,
3497 jni_CallIntMethod,
3498 jni_CallIntMethodV,
3499 jni_CallIntMethodA,
3500 jni_CallLongMethod,
3501 jni_CallLongMethodV,
3502 jni_CallLongMethodA,
3503 jni_CallFloatMethod,
3504 jni_CallFloatMethodV,
3505 jni_CallFloatMethodA,
3506 jni_CallDoubleMethod,
3507 jni_CallDoubleMethodV,
3508 jni_CallDoubleMethodA,
3509 jni_CallVoidMethod,
3510 jni_CallVoidMethodV,
3511 jni_CallVoidMethodA,
3512
3513 jni_CallNonvirtualObjectMethod,
3514 jni_CallNonvirtualObjectMethodV,
3515 jni_CallNonvirtualObjectMethodA,
3516 jni_CallNonvirtualBooleanMethod,
3517 jni_CallNonvirtualBooleanMethodV,
3518 jni_CallNonvirtualBooleanMethodA,
3519 jni_CallNonvirtualByteMethod,
3520 jni_CallNonvirtualByteMethodV,
3521 jni_CallNonvirtualByteMethodA,
3522 jni_CallNonvirtualCharMethod,
3523 jni_CallNonvirtualCharMethodV,
3524 jni_CallNonvirtualCharMethodA,
3525 jni_CallNonvirtualShortMethod,
3526 jni_CallNonvirtualShortMethodV,
3527 jni_CallNonvirtualShortMethodA,
3528 jni_CallNonvirtualIntMethod,
3529 jni_CallNonvirtualIntMethodV,
3530 jni_CallNonvirtualIntMethodA,
3531 jni_CallNonvirtualLongMethod,
3532 jni_CallNonvirtualLongMethodV,
3533 jni_CallNonvirtualLongMethodA,
3534 jni_CallNonvirtualFloatMethod,
3535 jni_CallNonvirtualFloatMethodV,
3536 jni_CallNonvirtualFloatMethodA,
3537 jni_CallNonvirtualDoubleMethod,
3538 jni_CallNonvirtualDoubleMethodV,
3539 jni_CallNonvirtualDoubleMethodA,
3540 jni_CallNonvirtualVoidMethod,
3541 jni_CallNonvirtualVoidMethodV,
3542 jni_CallNonvirtualVoidMethodA,
3543
3544 jni_GetFieldID,
3545
3546 jni_GetObjectField,
3547 jni_GetBooleanField,
3548 jni_GetByteField,
3549 jni_GetCharField,
3550 jni_GetShortField,
3551 jni_GetIntField,
3552 jni_GetLongField,
3553 jni_GetFloatField,
3554 jni_GetDoubleField,
3555
3556 jni_SetObjectField,
3557 jni_SetBooleanField,
3558 jni_SetByteField,
3559 jni_SetCharField,
3560 jni_SetShortField,
3561 jni_SetIntField,
3562 jni_SetLongField,
3563 jni_SetFloatField,
3564 jni_SetDoubleField,
3565
3566 jni_GetStaticMethodID,
3567
3568 jni_CallStaticObjectMethod,
3569 jni_CallStaticObjectMethodV,
3570 jni_CallStaticObjectMethodA,
3571 jni_CallStaticBooleanMethod,
3572 jni_CallStaticBooleanMethodV,
3573 jni_CallStaticBooleanMethodA,
3574 jni_CallStaticByteMethod,
3575 jni_CallStaticByteMethodV,
3576 jni_CallStaticByteMethodA,
3577 jni_CallStaticCharMethod,
3578 jni_CallStaticCharMethodV,
3579 jni_CallStaticCharMethodA,
3580 jni_CallStaticShortMethod,
3581 jni_CallStaticShortMethodV,
3582 jni_CallStaticShortMethodA,
3583 jni_CallStaticIntMethod,
3584 jni_CallStaticIntMethodV,
3585 jni_CallStaticIntMethodA,
3586 jni_CallStaticLongMethod,
3587 jni_CallStaticLongMethodV,
3588 jni_CallStaticLongMethodA,
3589 jni_CallStaticFloatMethod,
3590 jni_CallStaticFloatMethodV,
3591 jni_CallStaticFloatMethodA,
3592 jni_CallStaticDoubleMethod,
3593 jni_CallStaticDoubleMethodV,
3594 jni_CallStaticDoubleMethodA,
3595 jni_CallStaticVoidMethod,
3596 jni_CallStaticVoidMethodV,
3597 jni_CallStaticVoidMethodA,
3598
3599 jni_GetStaticFieldID,
3600
3601 jni_GetStaticObjectField,
3602 jni_GetStaticBooleanField,
3603 jni_GetStaticByteField,
3604 jni_GetStaticCharField,
3605 jni_GetStaticShortField,
3606 jni_GetStaticIntField,
3607 jni_GetStaticLongField,
3608 jni_GetStaticFloatField,
3609 jni_GetStaticDoubleField,
3610
3611 jni_SetStaticObjectField,
3612 jni_SetStaticBooleanField,
3613 jni_SetStaticByteField,
3614 jni_SetStaticCharField,
3615 jni_SetStaticShortField,
3616 jni_SetStaticIntField,
3617 jni_SetStaticLongField,
3618 jni_SetStaticFloatField,
3619 jni_SetStaticDoubleField,
3620
3621 jni_NewString,
3622 jni_GetStringLength,
3623 jni_GetStringChars,
3624 jni_ReleaseStringChars,
3625
3626 jni_NewStringUTF,
3627 jni_GetStringUTFLength,
3628 jni_GetStringUTFChars,
3629 jni_ReleaseStringUTFChars,
3630
3631 jni_GetArrayLength,
3632
3633 jni_NewObjectArray,
3634 jni_GetObjectArrayElement,
3635 jni_SetObjectArrayElement,
3636
3637 jni_NewBooleanArray,
3638 jni_NewByteArray,
3639 jni_NewCharArray,
3640 jni_NewShortArray,
3641 jni_NewIntArray,
3642 jni_NewLongArray,
3643 jni_NewFloatArray,
3644 jni_NewDoubleArray,
3645
3646 jni_GetBooleanArrayElements,
3647 jni_GetByteArrayElements,
3648 jni_GetCharArrayElements,
3649 jni_GetShortArrayElements,
3650 jni_GetIntArrayElements,
3651 jni_GetLongArrayElements,
3652 jni_GetFloatArrayElements,
3653 jni_GetDoubleArrayElements,
3654
3655 jni_ReleaseBooleanArrayElements,
3656 jni_ReleaseByteArrayElements,
3657 jni_ReleaseCharArrayElements,
3658 jni_ReleaseShortArrayElements,
3659 jni_ReleaseIntArrayElements,
3660 jni_ReleaseLongArrayElements,
3661 jni_ReleaseFloatArrayElements,
3662 jni_ReleaseDoubleArrayElements,
3663
3664 jni_GetBooleanArrayRegion,
3665 jni_GetByteArrayRegion,
3666 jni_GetCharArrayRegion,
3667 jni_GetShortArrayRegion,
3668 jni_GetIntArrayRegion,
3669 jni_GetLongArrayRegion,
3670 jni_GetFloatArrayRegion,
3671 jni_GetDoubleArrayRegion,
3672
3673 jni_SetBooleanArrayRegion,
3674 jni_SetByteArrayRegion,
3675 jni_SetCharArrayRegion,
3676 jni_SetShortArrayRegion,
3677 jni_SetIntArrayRegion,
3678 jni_SetLongArrayRegion,
3679 jni_SetFloatArrayRegion,
3680 jni_SetDoubleArrayRegion,
3681
3682 jni_RegisterNatives,
3683 jni_UnregisterNatives,
3684
3685 jni_MonitorEnter,
3686 jni_MonitorExit,
3687
3688 jni_GetJavaVM,
3689
3690 jni_GetStringRegion,
3691 jni_GetStringUTFRegion,
3692
3693 jni_GetPrimitiveArrayCritical,
3694 jni_ReleasePrimitiveArrayCritical,
3695
3696 jni_GetStringCritical,
3697 jni_ReleaseStringCritical,
3698
3699 jni_NewWeakGlobalRef,
3700 jni_DeleteWeakGlobalRef,
3701
3702 jni_ExceptionCheck,
3703
3704 jni_NewDirectByteBuffer,
3705 jni_GetDirectBufferAddress,
3706 jni_GetDirectBufferCapacity,
3707
3708 // New 1_6 features
3709
3710 jni_GetObjectRefType
3711 };
3712
3713
3714 // For jvmti use to modify jni function table.
3715 // Java threads in native contiues to run until it is transitioned
3716 // to VM at safepoint. Before the transition or before it is blocked
3717 // for safepoint it may access jni function table. VM could crash if
3718 // any java thread access the jni function table in the middle of memcpy.
3719 // To avoid this each function pointers are copied automically.
3720 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3721 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3722 intptr_t *a = (intptr_t *) jni_functions();
3723 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3724 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3725 Atomic::store_ptr(*b++, a++);
3726 }
3727 }
3728
3729 void quicken_jni_functions() {
3730 // Replace Get<Primitive>Field with fast versions
3731 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3732 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3733 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3734 // windows x86 currently needs SEH wrapper and the gain of the fast
3735 // versions currently isn't certain for server vm on uniprocessor.
3736 && os::is_MP()
3737 #endif
3738 ) {
3739 address func;
3740 func = JNI_FastGetField::generate_fast_get_boolean_field();
3741 if (func != (address)-1) {
3742 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3743 }
3744 func = JNI_FastGetField::generate_fast_get_byte_field();
3745 if (func != (address)-1) {
3746 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3747 }
3748 func = JNI_FastGetField::generate_fast_get_char_field();
3749 if (func != (address)-1) {
3750 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3751 }
3752 func = JNI_FastGetField::generate_fast_get_short_field();
3753 if (func != (address)-1) {
3754 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3755 }
3756 func = JNI_FastGetField::generate_fast_get_int_field();
3757 if (func != (address)-1) {
3758 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3759 }
3760 func = JNI_FastGetField::generate_fast_get_long_field();
3761 if (func != (address)-1) {
3762 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3763 }
3764 func = JNI_FastGetField::generate_fast_get_float_field();
3765 if (func != (address)-1) {
3766 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3767 }
3768 func = JNI_FastGetField::generate_fast_get_double_field();
3769 if (func != (address)-1) {
3770 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3771 }
3772 }
3773 }
3774
3775 // Returns the function structure
3776 struct JNINativeInterface_* jni_functions() {
3777 #if INCLUDE_JNI_CHECK
3778 if (CheckJNICalls) return jni_functions_check();
3779 #endif // INCLUDE_JNI_CHECK
3780 return &jni_NativeInterface;
3781 }
3782
3783 // Returns the function structure
3784 struct JNINativeInterface_* jni_functions_nocheck() {
3785 return &jni_NativeInterface;
3786 }
3787
3788
3789 // Invocation API
3790
3791
3792 // Forward declaration
3793 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3794
3795 // Global invocation API vars
3796 volatile jint vm_created = 0;
3797 // Indicate whether it is safe to recreate VM
3798 volatile jint safe_to_recreate_vm = 1;
3799 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3800
3801
3802 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3803 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3804
3805 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3806 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3807
3808 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3809 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3810 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3811 jint ret = JNI_ERR;
3812 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3813
3814 if (Threads::is_supported_jni_version(args->version)) {
3815 ret = JNI_OK;
3816 }
3817 // 1.1 style no longer supported in hotspot.
3818 // According the JNI spec, we should update args->version on return.
3819 // We also use the structure to communicate with launcher about default
3820 // stack size.
3821 if (args->version == JNI_VERSION_1_1) {
3822 args->version = JNI_VERSION_1_2;
3823 // javaStackSize is int in arguments structure
3824 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3825 args->javaStackSize = (jint)(ThreadStackSize * K);
3826 }
3827 return ret;
3828 }
3829
3830 #ifndef PRODUCT
3831
3832 #include "gc_implementation/shared/gcTimer.hpp"
3833 #include "gc_interface/collectedHeap.hpp"
3834 #if INCLUDE_ALL_GCS
3835 #include "gc_implementation/g1/heapRegionRemSet.hpp"
3836 #endif
3837 #include "memory/guardedMemory.hpp"
3838 #include "utilities/quickSort.hpp"
3839 #include "utilities/ostream.hpp"
3840 #if INCLUDE_VM_STRUCTS
3841 #include "runtime/vmStructs.hpp"
3842 #endif
3843
3844 #define run_unit_test(unit_test_function_call) \
3845 tty->print_cr("Running test: " #unit_test_function_call); \
3846 unit_test_function_call
3847
3848 // Forward declaration
3849 void TestReservedSpace_test();
3850 void TestReserveMemorySpecial_test();
3851 void TestVirtualSpace_test();
3852 void TestMetaspaceAux_test();
3853 void TestMetachunk_test();
3854 void TestVirtualSpaceNode_test();
3855 void TestNewSize_test();
3856 void TestOldSize_test();
3857 void TestKlass_test();
3858 void TestBitMap_test();
3859 void TestAsUtf8();
3860 #if INCLUDE_ALL_GCS
3861 void TestOldFreeSpaceCalculation_test();
3862 void TestG1BiasedArray_test();
3863 void TestBufferingOopClosure_test();
3864 void TestCodeCacheRemSet_test();
3865 #endif
3866
3867 void execute_internal_vm_tests() {
3868 if (ExecuteInternalVMTests) {
3869 tty->print_cr("Running internal VM tests");
3870 run_unit_test(TestReservedSpace_test());
3871 run_unit_test(TestReserveMemorySpecial_test());
3872 run_unit_test(TestVirtualSpace_test());
3873 run_unit_test(TestMetaspaceAux_test());
3874 run_unit_test(TestMetachunk_test());
3875 run_unit_test(TestVirtualSpaceNode_test());
3876 run_unit_test(GlobalDefinitions::test_globals());
3877 run_unit_test(GCTimerAllTest::all());
3878 run_unit_test(arrayOopDesc::test_max_array_length());
3879 run_unit_test(CollectedHeap::test_is_in());
3880 run_unit_test(QuickSort::test_quick_sort());
3881 run_unit_test(GuardedMemory::test_guarded_memory());
3882 run_unit_test(AltHashing::test_alt_hash());
3883 run_unit_test(test_loggc_filename());
3884 run_unit_test(TestNewSize_test());
3885 run_unit_test(TestOldSize_test());
3886 run_unit_test(TestKlass_test());
3887 run_unit_test(TestBitMap_test());
3888 run_unit_test(TestAsUtf8());
3889 run_unit_test(ObjectMonitor::sanity_checks());
3890 #if INCLUDE_VM_STRUCTS
3891 run_unit_test(VMStructs::test());
3892 #endif
3893 #if INCLUDE_ALL_GCS
3894 run_unit_test(TestOldFreeSpaceCalculation_test());
3895 run_unit_test(TestG1BiasedArray_test());
3896 run_unit_test(HeapRegionRemSet::test_prt());
3897 run_unit_test(TestBufferingOopClosure_test());
3898 run_unit_test(TestCodeCacheRemSet_test());
3899 #endif
3900 tty->print_cr("All internal VM tests passed");
3901 }
3902 }
3903
3904 #undef run_unit_test
3905
3906 #endif
3907
3908 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3909 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3910
3911 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3912 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3913
3914 jint result = JNI_ERR;
3915 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3916
3917 // We're about to use Atomic::xchg for synchronization. Some Zero
3918 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3919 // but __sync_lock_test_and_set is not guaranteed to do what we want
3920 // on all architectures. So we check it works before relying on it.
3921 #if defined(ZERO) && defined(ASSERT)
3922 {
3923 jint a = 0xcafebabe;
3924 jint b = Atomic::xchg(0xdeadbeef, &a);
3925 void *c = &a;
3926 void *d = Atomic::xchg_ptr(&b, &c);
3927 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3928 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3929 }
3930 #endif // ZERO && ASSERT
3931
3932 // At the moment it's only possible to have one Java VM,
3933 // since some of the runtime state is in global variables.
3934
3935 // We cannot use our mutex locks here, since they only work on
3936 // Threads. We do an atomic compare and exchange to ensure only
3937 // one thread can call this method at a time
3938
3939 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3940 // the add/dec implementations are dependent on whether we are running
3941 // on a multiprocessor, and at this stage of initialization the os::is_MP
3942 // function used to determine this will always return false. Atomic::xchg
3943 // does not have this problem.
3944 if (Atomic::xchg(1, &vm_created) == 1) {
3945 return JNI_EEXIST; // already created, or create attempt in progress
3946 }
3947 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3948 return JNI_ERR; // someone tried and failed and retry not allowed.
3949 }
3950
3951 assert(vm_created == 1, "vm_created is true during the creation");
3952
3953 /**
3954 * Certain errors during initialization are recoverable and do not
3955 * prevent this method from being called again at a later time
3956 * (perhaps with different arguments). However, at a certain
3957 * point during initialization if an error occurs we cannot allow
3958 * this function to be called again (or it will crash). In those
3959 * situations, the 'canTryAgain' flag is set to false, which atomically
3960 * sets safe_to_recreate_vm to 1, such that any new call to
3961 * JNI_CreateJavaVM will immediately fail using the above logic.
3962 */
3963 bool can_try_again = true;
3964
3965 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3966 if (result == JNI_OK) {
3967 JavaThread *thread = JavaThread::current();
3968 assert(!thread->has_pending_exception(), "should have returned not OK");
3969 /* thread is thread_in_vm here */
3970 *vm = (JavaVM *)(&main_vm);
3971 *(JNIEnv**)penv = thread->jni_environment();
3972
3973 // Tracks the time application was running before GC
3974 RuntimeService::record_application_start();
3975
3976 // Notify JVMTI
3977 if (JvmtiExport::should_post_thread_life()) {
3978 JvmtiExport::post_thread_start(thread);
3979 }
3980
3981 EventThreadStart event;
3982 if (event.should_commit()) {
3983 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
3984 event.commit();
3985 }
3986
3987 #ifndef PRODUCT
3988 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED
3989 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f()
3990 #endif
3991
3992 // Check if we should compile all classes on bootclasspath
3993 if (CompileTheWorld) ClassLoader::compile_the_world();
3994 if (ReplayCompiles) ciReplay::replay(thread);
3995
3996 // Some platforms (like Win*) need a wrapper around these test
3997 // functions in order to properly handle error conditions.
3998 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler);
3999 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests);
4000 #endif
4001
4002 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4003 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4004 } else {
4005 // If create_vm exits because of a pending exception, exit with that
4006 // exception. In the future when we figure out how to reclaim memory,
4007 // we may be able to exit with JNI_ERR and allow the calling application
4008 // to continue.
4009 if (Universe::is_fully_initialized()) {
4010 // otherwise no pending exception possible - VM will already have aborted
4011 JavaThread* THREAD = JavaThread::current();
4012 if (HAS_PENDING_EXCEPTION) {
4013 HandleMark hm;
4014 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4015 }
4016 }
4017
4018 if (can_try_again) {
4019 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4020 safe_to_recreate_vm = 1;
4021 }
4022
4023 // Creation failed. We must reset vm_created
4024 *vm = 0;
4025 *(JNIEnv**)penv = 0;
4026 // reset vm_created last to avoid race condition. Use OrderAccess to
4027 // control both compiler and architectural-based reordering.
4028 OrderAccess::release_store(&vm_created, 0);
4029 }
4030
4031 return result;
4032 }
4033
4034
4035 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4036 // See bug 4367188, the wrapper can sometimes cause VM crashes
4037 // JNIWrapper("GetCreatedJavaVMs");
4038
4039 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4040
4041 if (vm_created) {
4042 if (numVMs != NULL) *numVMs = 1;
4043 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4044 } else {
4045 if (numVMs != NULL) *numVMs = 0;
4046 }
4047 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4048 return JNI_OK;
4049 }
4050
4051 extern "C" {
4052
4053 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4054 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4055
4056 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4057 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4058 jint res = JNI_ERR;
4059 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4060
4061 if (!vm_created) {
4062 res = JNI_ERR;
4063 return res;
4064 }
4065
4066 JNIWrapper("DestroyJavaVM");
4067 JNIEnv *env;
4068 JavaVMAttachArgs destroyargs;
4069 destroyargs.version = CurrentVersion;
4070 destroyargs.name = (char *)"DestroyJavaVM";
4071 destroyargs.group = NULL;
4072 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4073 if (res != JNI_OK) {
4074 return res;
4075 }
4076
4077 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4078 JavaThread* thread = JavaThread::current();
4079 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4080 if (Threads::destroy_vm()) {
4081 // Should not change thread state, VM is gone
4082 vm_created = false;
4083 res = JNI_OK;
4084 return res;
4085 } else {
4086 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4087 res = JNI_ERR;
4088 return res;
4089 }
4090 }
4091
4092
4093 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4094 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4095
4096 // Check below commented out from JDK1.2fcs as well
4097 /*
4098 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4099 return JNI_EVERSION;
4100 }
4101 */
4102
4103 Thread* t = ThreadLocalStorage::get_thread_slow();
4104 if (t != NULL) {
4105 // If the thread has been attached this operation is a no-op
4106 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4107 return JNI_OK;
4108 }
4109
4110 // Create a thread and mark it as attaching so it will be skipped by the
4111 // ThreadsListEnumerator - see CR 6404306
4112 JavaThread* thread = new JavaThread(true);
4113
4114 // Set correct safepoint info. The thread is going to call into Java when
4115 // initializing the Java level thread object. Hence, the correct state must
4116 // be set in order for the Safepoint code to deal with it correctly.
4117 thread->set_thread_state(_thread_in_vm);
4118 // Must do this before initialize_thread_local_storage
4119 thread->record_stack_base_and_size();
4120
4121 thread->initialize_thread_local_storage();
4122
4123 if (!os::create_attached_thread(thread)) {
4124 delete thread;
4125 return JNI_ERR;
4126 }
4127 // Enable stack overflow checks
4128 thread->create_stack_guard_pages();
4129
4130 thread->initialize_tlab();
4131
4132 thread->cache_global_variables();
4133
4134 // Crucial that we do not have a safepoint check for this thread, since it has
4135 // not been added to the Thread list yet.
4136 { Threads_lock->lock_without_safepoint_check();
4137 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4138 // avoid this thread trying to do a GC before it is added to the thread-list
4139 thread->set_active_handles(JNIHandleBlock::allocate_block());
4140 Threads::add(thread, daemon);
4141 Threads_lock->unlock();
4142 }
4143 // Create thread group and name info from attach arguments
4144 oop group = NULL;
4145 char* thread_name = NULL;
4146 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4147 group = JNIHandles::resolve(args->group);
4148 thread_name = args->name; // may be NULL
4149 }
4150 if (group == NULL) group = Universe::main_thread_group();
4151
4152 // Create Java level thread object and attach it to this thread
4153 bool attach_failed = false;
4154 {
4155 EXCEPTION_MARK;
4156 HandleMark hm(THREAD);
4157 Handle thread_group(THREAD, group);
4158 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4159 if (HAS_PENDING_EXCEPTION) {
4160 CLEAR_PENDING_EXCEPTION;
4161 // cleanup outside the handle mark.
4162 attach_failed = true;
4163 }
4164 }
4165
4166 if (attach_failed) {
4167 // Added missing cleanup
4168 thread->cleanup_failed_attach_current_thread();
4169 return JNI_ERR;
4170 }
4171
4172 // mark the thread as no longer attaching
4173 // this uses a fence to push the change through so we don't have
4174 // to regrab the threads_lock
4175 thread->set_done_attaching_via_jni();
4176
4177 // Set java thread status.
4178 java_lang_Thread::set_thread_status(thread->threadObj(),
4179 java_lang_Thread::RUNNABLE);
4180
4181 // Notify the debugger
4182 if (JvmtiExport::should_post_thread_life()) {
4183 JvmtiExport::post_thread_start(thread);
4184 }
4185
4186 EventThreadStart event;
4187 if (event.should_commit()) {
4188 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4189 event.commit();
4190 }
4191
4192 *(JNIEnv**)penv = thread->jni_environment();
4193
4194 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4195 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4196 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4197 // needed.
4198
4199 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4200
4201 // Perform any platform dependent FPU setup
4202 os::setup_fpu();
4203
4204 return JNI_OK;
4205 }
4206
4207
4208 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4209 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4210 if (!vm_created) {
4211 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4212 return JNI_ERR;
4213 }
4214
4215 JNIWrapper("AttachCurrentThread");
4216 jint ret = attach_current_thread(vm, penv, _args, false);
4217 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4218 return ret;
4219 }
4220
4221
4222 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4223 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4224 VM_Exit::block_if_vm_exited();
4225
4226 JNIWrapper("DetachCurrentThread");
4227
4228 // If the thread has been deattacted the operations is a no-op
4229 if (ThreadLocalStorage::thread() == NULL) {
4230 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4231 return JNI_OK;
4232 }
4233
4234 JavaThread* thread = JavaThread::current();
4235 if (thread->has_last_Java_frame()) {
4236 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4237 // Can't detach a thread that's running java, that can't work.
4238 return JNI_ERR;
4239 }
4240
4241 // Safepoint support. Have to do call-back to safepoint code, if in the
4242 // middel of a safepoint operation
4243 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4244
4245 // XXX: Note that JavaThread::exit() call below removes the guards on the
4246 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4247 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4248 // of the guards is visible in jni_AttachCurrentThread above,
4249 // the removal of the guards is buried below in JavaThread::exit()
4250 // here. The abstraction should be more symmetrically either exposed
4251 // or hidden (e.g. it could probably be hidden in the same
4252 // (platform-dependent) methods where we do alternate stack
4253 // maintenance work?)
4254 thread->exit(false, JavaThread::jni_detach);
4255 delete thread;
4256
4257 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4258 return JNI_OK;
4259 }
4260
4261 DT_RETURN_MARK_DECL(GetEnv, jint
4262 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4263
4264 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4265 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4266 jint ret = JNI_ERR;
4267 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4268
4269 if (!vm_created) {
4270 *penv = NULL;
4271 ret = JNI_EDETACHED;
4272 return ret;
4273 }
4274
4275 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4276 return ret;
4277 }
4278
4279 #ifndef JVMPI_VERSION_1
4280 // need these in order to be polite about older agents
4281 #define JVMPI_VERSION_1 ((jint)0x10000001)
4282 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4283 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4284 #endif // !JVMPI_VERSION_1
4285
4286 Thread* thread = ThreadLocalStorage::thread();
4287 if (thread != NULL && thread->is_Java_thread()) {
4288 if (Threads::is_supported_jni_version_including_1_1(version)) {
4289 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4290 ret = JNI_OK;
4291 return ret;
4292
4293 } else if (version == JVMPI_VERSION_1 ||
4294 version == JVMPI_VERSION_1_1 ||
4295 version == JVMPI_VERSION_1_2) {
4296 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4297 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4298 ret = JNI_EVERSION;
4299 return ret;
4300 } else if (JvmtiExport::is_jvmdi_version(version)) {
4301 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4302 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4303 ret = JNI_EVERSION;
4304 return ret;
4305 } else {
4306 *penv = NULL;
4307 ret = JNI_EVERSION;
4308 return ret;
4309 }
4310 } else {
4311 *penv = NULL;
4312 ret = JNI_EDETACHED;
4313 return ret;
4314 }
4315 }
4316
4317
4318 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4319 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4320 if (!vm_created) {
4321 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4322 return JNI_ERR;
4323 }
4324
4325 JNIWrapper("AttachCurrentThreadAsDaemon");
4326 jint ret = attach_current_thread(vm, penv, _args, true);
4327 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4328 return ret;
4329 }
4330
4331
4332 } // End extern "C"
4333
4334 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4335 NULL,
4336 NULL,
4337 NULL,
4338
4339 jni_DestroyJavaVM,
4340 jni_AttachCurrentThread,
4341 jni_DetachCurrentThread,
4342 jni_GetEnv,
4343 jni_AttachCurrentThreadAsDaemon
4344 };