1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "gc/shared/gcLocker.inline.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "memory/allocation.hpp"
37 #include "memory/allocation.inline.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/instanceKlass.hpp"
41 #include "oops/instanceOop.hpp"
42 #include "oops/markOop.hpp"
43 #include "oops/method.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "oops/typeArrayKlass.hpp"
49 #include "oops/typeArrayOop.hpp"
50 #include "prims/jni.h"
51 #include "prims/jniCheck.hpp"
52 #include "prims/jniExport.hpp"
53 #include "prims/jniFastGetField.hpp"
54 #include "prims/jvm.h"
55 #include "prims/jvm_misc.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "runtime/atomic.inline.hpp"
59 #include "runtime/compilationPolicy.hpp"
60 #include "runtime/fieldDescriptor.hpp"
61 #include "runtime/fprofiler.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/interfaceSupport.hpp"
64 #include "runtime/java.hpp"
65 #include "runtime/javaCalls.hpp"
66 #include "runtime/jfieldIDWorkaround.hpp"
67 #include "runtime/orderAccess.inline.hpp"
68 #include "runtime/reflection.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/signature.hpp"
71 #include "runtime/thread.inline.hpp"
72 #include "runtime/vm_operations.hpp"
73 #include "services/memTracker.hpp"
74 #include "services/runtimeService.hpp"
75 #include "trace/tracing.hpp"
76 #include "utilities/defaultStream.hpp"
77 #include "utilities/dtrace.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/histogram.hpp"
80 #include "utilities/macros.hpp"
81 #if INCLUDE_ALL_GCS
82 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
83 #endif // INCLUDE_ALL_GCS
84 #if INCLUDE_JVMCI
85 #include "jvmci/jvmciCompiler.hpp"
86 #include "jvmci/jvmciRuntime.hpp"
87 #endif
88
89 static jint CurrentVersion = JNI_VERSION_1_8;
90
91 #ifdef _WIN32
92 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
93 #endif
94
95 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
96 // '-return' probe regardless of the return path is taken out of the function.
97 // Methods that have multiple return paths use this to avoid having to
98 // instrument each return path. Methods that use CHECK or THROW must use this
99 // since those macros can cause an immedate uninstrumented return.
100 //
101 // In order to get the return value, a reference to the variable containing
102 // the return value must be passed to the contructor of the object, and
103 // the return value must be set before return (since the mark object has
104 // a reference to it).
105 //
106 // Example:
107 // DT_RETURN_MARK_DECL(SomeFunc, int);
108 // JNI_ENTRY(int, SomeFunc, ...)
109 // int return_value = 0;
110 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
111 // foo(CHECK_0)
112 // return_value = 5;
113 // return return_value;
114 // JNI_END
115 #define DT_RETURN_MARK_DECL(name, type, probe) \
116 DTRACE_ONLY( \
117 class DTraceReturnProbeMark_##name { \
118 public: \
119 const type& _ret_ref; \
120 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
121 ~DTraceReturnProbeMark_##name() { \
122 probe; \
123 } \
124 } \
125 )
126 // Void functions are simpler since there's no return value
127 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
128 DTRACE_ONLY( \
129 class DTraceReturnProbeMark_##name { \
130 public: \
131 ~DTraceReturnProbeMark_##name() { \
132 probe; \
133 } \
134 } \
135 )
136
137 // Place these macros in the function to mark the return. Non-void
138 // functions need the type and address of the return value.
139 #define DT_RETURN_MARK(name, type, ref) \
140 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
141 #define DT_VOID_RETURN_MARK(name) \
142 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
143
144
145 // Use these to select distinct code for floating-point vs. non-floating point
146 // situations. Used from within common macros where we need slightly
147 // different behavior for Float/Double
148 #define FP_SELECT_Boolean(intcode, fpcode) intcode
149 #define FP_SELECT_Byte(intcode, fpcode) intcode
150 #define FP_SELECT_Char(intcode, fpcode) intcode
151 #define FP_SELECT_Short(intcode, fpcode) intcode
152 #define FP_SELECT_Object(intcode, fpcode) intcode
153 #define FP_SELECT_Int(intcode, fpcode) intcode
154 #define FP_SELECT_Long(intcode, fpcode) intcode
155 #define FP_SELECT_Float(intcode, fpcode) fpcode
156 #define FP_SELECT_Double(intcode, fpcode) fpcode
157 #define FP_SELECT(TypeName, intcode, fpcode) \
158 FP_SELECT_##TypeName(intcode, fpcode)
159
160 #define COMMA ,
161
162 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
163 // (dtrace doesn't do FP yet)
164 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
165 FP_SELECT(TypeName, \
166 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
167 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
168 FP_SELECT(TypeName, \
169 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
170
171
172 // out-of-line helpers for class jfieldIDWorkaround:
173
174 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
175 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
176 uintptr_t as_uint = (uintptr_t) id;
177 intptr_t offset = raw_instance_offset(id);
178 if (is_checked_jfieldID(id)) {
179 if (!klass_hash_ok(k, id)) {
180 return false;
181 }
182 }
183 return InstanceKlass::cast(k)->contains_field_offset(offset);
184 } else {
185 JNIid* result = (JNIid*) id;
186 #ifdef ASSERT
187 return result != NULL && result->is_static_field_id();
188 #else
189 return result != NULL;
190 #endif
191 }
192 }
193
194
195 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
196 if (offset <= small_offset_mask) {
197 Klass* field_klass = k;
198 Klass* super_klass = field_klass->super();
199 // With compressed oops the most super class with nonstatic fields would
200 // be the owner of fields embedded in the header.
201 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
202 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
203 field_klass = super_klass; // super contains the field also
204 super_klass = field_klass->super();
205 }
206 debug_only(No_Safepoint_Verifier nosafepoint;)
207 uintptr_t klass_hash = field_klass->identity_hash();
208 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
209 } else {
210 #if 0
211 #ifndef PRODUCT
212 {
213 ResourceMark rm;
214 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
215 }
216 #endif
217 #endif
218 return 0;
219 }
220 }
221
222 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
223 uintptr_t as_uint = (uintptr_t) id;
224 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
225 do {
226 debug_only(No_Safepoint_Verifier nosafepoint;)
227 // Could use a non-blocking query for identity_hash here...
228 if ((k->identity_hash() & klass_mask) == klass_hash)
229 return true;
230 k = k->super();
231 } while (k != NULL);
232 return false;
233 }
234
235 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
236 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
237 uintptr_t as_uint = (uintptr_t) id;
238 intptr_t offset = raw_instance_offset(id);
239 if (VerifyJNIFields) {
240 if (is_checked_jfieldID(id)) {
241 guarantee(klass_hash_ok(k, id),
242 "Bug in native code: jfieldID class must match object");
243 } else {
244 #if 0
245 #ifndef PRODUCT
246 if (Verbose) {
247 ResourceMark rm;
248 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
249 }
250 #endif
251 #endif
252 }
253 }
254 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
255 "Bug in native code: jfieldID offset must address interior of object");
256 }
257
258 // Wrapper to trace JNI functions
259
260 #ifdef ASSERT
261 Histogram* JNIHistogram;
262 static volatile jint JNIHistogram_lock = 0;
263
264 class JNIHistogramElement : public HistogramElement {
265 public:
266 JNIHistogramElement(const char* name);
267 };
268
269 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
270 _name = elementName;
271 uintx count = 0;
272
273 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
274 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
275 count +=1;
276 if ( (WarnOnStalledSpinLock > 0)
277 && (count % WarnOnStalledSpinLock == 0)) {
278 warning("JNIHistogram_lock seems to be stalled");
279 }
280 }
281 }
282
283
284 if(JNIHistogram == NULL)
285 JNIHistogram = new Histogram("JNI Call Counts",100);
286
287 JNIHistogram->add_element(this);
288 Atomic::dec(&JNIHistogram_lock);
289 }
290
291 #define JNICountWrapper(arg) \
292 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
293 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
294 if (e != NULL) e->increment_count()
295 #define JNIWrapper(arg) JNICountWrapper(arg);
296 #else
297 #define JNIWrapper(arg)
298 #endif
299
300
301 // Implementation of JNI entries
302
303 DT_RETURN_MARK_DECL(DefineClass, jclass
304 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
305
306 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
307 const jbyte *buf, jsize bufLen))
308 JNIWrapper("DefineClass");
309
310 HOTSPOT_JNI_DEFINECLASS_ENTRY(
311 env, (char*) name, loaderRef, (char*) buf, bufLen);
312
313 jclass cls = NULL;
314 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
315
316 TempNewSymbol class_name = NULL;
317 // Since exceptions can be thrown, class initialization can take place
318 // if name is NULL no check for class name in .class stream has to be made.
319 if (name != NULL) {
320 const int str_len = (int)strlen(name);
321 if (str_len > Symbol::max_length()) {
322 // It's impossible to create this class; the name cannot fit
323 // into the constant pool.
324 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
325 }
326 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
327 }
328 ResourceMark rm(THREAD);
329 ClassFileStream st((u1*) buf, bufLen, NULL);
330 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
331
332 if (UsePerfData && !class_loader.is_null()) {
333 // check whether the current caller thread holds the lock or not.
334 // If not, increment the corresponding counter
335 if (ObjectSynchronizer::
336 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
337 ObjectSynchronizer::owner_self) {
338 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
339 }
340 }
341 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
342 Handle(), &st, true,
343 CHECK_NULL);
344
345 if (TraceClassResolution && k != NULL) {
346 trace_class_resolution(k);
347 }
348
349 cls = (jclass)JNIHandles::make_local(
350 env, k->java_mirror());
351 return cls;
352 JNI_END
353
354
355
356 static bool first_time_FindClass = true;
357
358 DT_RETURN_MARK_DECL(FindClass, jclass
359 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
360
361 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
362 JNIWrapper("FindClass");
363
364 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
365
366 jclass result = NULL;
367 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
368
369 // Remember if we are the first invocation of jni_FindClass
370 bool first_time = first_time_FindClass;
371 first_time_FindClass = false;
372
373 // Sanity check the name: it cannot be null or larger than the maximum size
374 // name we can fit in the constant pool.
375 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
376 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
377 }
378
379 //%note jni_3
380 Handle loader;
381 Handle protection_domain;
382 // Find calling class
383 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
384 if (k.not_null()) {
385 loader = Handle(THREAD, k->class_loader());
386 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
387 // in the correct class context.
388 if (loader.is_null() &&
389 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
390 JavaValue result(T_OBJECT);
391 JavaCalls::call_static(&result, k,
392 vmSymbols::getFromClass_name(),
393 vmSymbols::void_class_signature(),
394 thread);
395 if (HAS_PENDING_EXCEPTION) {
396 Handle ex(thread, thread->pending_exception());
397 CLEAR_PENDING_EXCEPTION;
398 THROW_HANDLE_0(ex);
399 }
400 oop mirror = (oop) result.get_jobject();
401 loader = Handle(THREAD,
402 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
403 protection_domain = Handle(THREAD,
404 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
405 }
406 } else {
407 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
408 loader = Handle(THREAD, SystemDictionary::java_system_loader());
409 }
410
411 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
412 result = find_class_from_class_loader(env, sym, true, loader,
413 protection_domain, true, thread);
414
415 if (TraceClassResolution && result != NULL) {
416 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
417 }
418
419 // If we were the first invocation of jni_FindClass, we enable compilation again
420 // rather than just allowing invocation counter to overflow and decay.
421 // Controlled by flag DelayCompilationDuringStartup.
422 if (first_time && !CompileTheWorld)
423 CompilationPolicy::completed_vm_startup();
424
425 return result;
426 JNI_END
427
428 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
429 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
430
431 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
432 JNIWrapper("FromReflectedMethod");
433
434 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
435
436 jmethodID ret = NULL;
437 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
438
439 // method is a handle to a java.lang.reflect.Method object
440 oop reflected = JNIHandles::resolve_non_null(method);
441 oop mirror = NULL;
442 int slot = 0;
443
444 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
445 mirror = java_lang_reflect_Constructor::clazz(reflected);
446 slot = java_lang_reflect_Constructor::slot(reflected);
447 } else {
448 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
449 mirror = java_lang_reflect_Method::clazz(reflected);
450 slot = java_lang_reflect_Method::slot(reflected);
451 }
452 Klass* k = java_lang_Class::as_Klass(mirror);
453
454 KlassHandle k1(THREAD, k);
455 // Make sure class is initialized before handing id's out to methods
456 k1()->initialize(CHECK_NULL);
457 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
458 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
459 return ret;
460 JNI_END
461
462 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
463 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
464
465 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
466 JNIWrapper("FromReflectedField");
467
468 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
469
470 jfieldID ret = NULL;
471 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
472
473 // field is a handle to a java.lang.reflect.Field object
474 oop reflected = JNIHandles::resolve_non_null(field);
475 oop mirror = java_lang_reflect_Field::clazz(reflected);
476 Klass* k = java_lang_Class::as_Klass(mirror);
477 int slot = java_lang_reflect_Field::slot(reflected);
478 int modifiers = java_lang_reflect_Field::modifiers(reflected);
479
480 KlassHandle k1(THREAD, k);
481 // Make sure class is initialized before handing id's out to fields
482 k1()->initialize(CHECK_NULL);
483
484 // First check if this is a static field
485 if (modifiers & JVM_ACC_STATIC) {
486 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
487 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
488 assert(id != NULL, "corrupt Field object");
489 debug_only(id->set_is_static_field_id();)
490 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
491 ret = jfieldIDWorkaround::to_static_jfieldID(id);
492 return ret;
493 }
494
495 // The slot is the index of the field description in the field-array
496 // The jfieldID is the offset of the field within the object
497 // It may also have hash bits for k, if VerifyJNIFields is turned on.
498 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
499 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
500 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
501 return ret;
502 JNI_END
503
504
505 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
506 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
507
508 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
509 JNIWrapper("ToReflectedMethod");
510
511 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
512
513 jobject ret = NULL;
514 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
515
516 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
517 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
518 oop reflection_method;
519 if (m->is_initializer()) {
520 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
521 } else {
522 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
523 }
524 ret = JNIHandles::make_local(env, reflection_method);
525 return ret;
526 JNI_END
527
528 DT_RETURN_MARK_DECL(GetSuperclass, jclass
529 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
530
531 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
532 JNIWrapper("GetSuperclass");
533
534 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
535
536 jclass obj = NULL;
537 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
538
539 oop mirror = JNIHandles::resolve_non_null(sub);
540 // primitive classes return NULL
541 if (java_lang_Class::is_primitive(mirror)) return NULL;
542
543 // Rules of Class.getSuperClass as implemented by KLass::java_super:
544 // arrays return Object
545 // interfaces return NULL
546 // proper classes return Klass::super()
547 Klass* k = java_lang_Class::as_Klass(mirror);
548 if (k->is_interface()) return NULL;
549
550 // return mirror for superclass
551 Klass* super = k->java_super();
552 // super2 is the value computed by the compiler's getSuperClass intrinsic:
553 debug_only(Klass* super2 = ( k->is_array_klass()
554 ? SystemDictionary::Object_klass()
555 : k->super() ) );
556 assert(super == super2,
557 "java_super computation depends on interface, array, other super");
558 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
559 return obj;
560 JNI_END
561
562 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
563 JNIWrapper("IsSubclassOf");
564
565 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
566
567 oop sub_mirror = JNIHandles::resolve_non_null(sub);
568 oop super_mirror = JNIHandles::resolve_non_null(super);
569 if (java_lang_Class::is_primitive(sub_mirror) ||
570 java_lang_Class::is_primitive(super_mirror)) {
571 jboolean ret = (sub_mirror == super_mirror);
572
573 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
574 return ret;
575 }
576 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
577 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
578 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
579 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
580 JNI_TRUE : JNI_FALSE;
581
582 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
583 return ret;
584 JNI_END
585
586
587 DT_RETURN_MARK_DECL(Throw, jint
588 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
589
590 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
591 JNIWrapper("Throw");
592
593 HOTSPOT_JNI_THROW_ENTRY(env, obj);
594
595 jint ret = JNI_OK;
596 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
597
598 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
599 ShouldNotReachHere();
600 return 0; // Mute compiler.
601 JNI_END
602
603
604 DT_RETURN_MARK_DECL(ThrowNew, jint
605 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
606
607 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
608 JNIWrapper("ThrowNew");
609
610 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
611
612 jint ret = JNI_OK;
613 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
614
615 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
616 Symbol* name = k->name();
617 Handle class_loader (THREAD, k->class_loader());
618 Handle protection_domain (THREAD, k->protection_domain());
619 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
620 ShouldNotReachHere();
621 return 0; // Mute compiler.
622 JNI_END
623
624
625 // JNI functions only transform a pending async exception to a synchronous
626 // exception in ExceptionOccurred and ExceptionCheck calls, since
627 // delivering an async exception in other places won't change the native
628 // code's control flow and would be harmful when native code further calls
629 // JNI functions with a pending exception. Async exception is also checked
630 // during the call, so ExceptionOccurred/ExceptionCheck won't return
631 // false but deliver the async exception at the very end during
632 // state transition.
633
634 static void jni_check_async_exceptions(JavaThread *thread) {
635 assert(thread == Thread::current(), "must be itself");
636 thread->check_and_handle_async_exceptions();
637 }
638
639 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
640 JNIWrapper("ExceptionOccurred");
641
642 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
643
644 jni_check_async_exceptions(thread);
645 oop exception = thread->pending_exception();
646 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
647
648 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
649 return ret;
650 JNI_END
651
652
653 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
654 JNIWrapper("ExceptionDescribe");
655
656 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
657
658 if (thread->has_pending_exception()) {
659 Handle ex(thread, thread->pending_exception());
660 thread->clear_pending_exception();
661 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
662 // Don't print anything if we are being killed.
663 } else {
664 jio_fprintf(defaultStream::error_stream(), "Exception ");
665 if (thread != NULL && thread->threadObj() != NULL) {
666 ResourceMark rm(THREAD);
667 jio_fprintf(defaultStream::error_stream(),
668 "in thread \"%s\" ", thread->get_thread_name());
669 }
670 if (ex->is_a(SystemDictionary::Throwable_klass())) {
671 JavaValue result(T_VOID);
672 JavaCalls::call_virtual(&result,
673 ex,
674 KlassHandle(THREAD,
675 SystemDictionary::Throwable_klass()),
676 vmSymbols::printStackTrace_name(),
677 vmSymbols::void_method_signature(),
678 THREAD);
679 // If an exception is thrown in the call it gets thrown away. Not much
680 // we can do with it. The native code that calls this, does not check
681 // for the exception - hence, it might still be in the thread when DestroyVM gets
682 // called, potentially causing a few asserts to trigger - since no pending exception
683 // is expected.
684 CLEAR_PENDING_EXCEPTION;
685 } else {
686 ResourceMark rm(THREAD);
687 jio_fprintf(defaultStream::error_stream(),
688 ". Uncaught exception of type %s.",
689 ex->klass()->external_name());
690 }
691 }
692 }
693
694 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
695 JNI_END
696
697
698 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
699 JNIWrapper("ExceptionClear");
700
701 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
702
703 // The jni code might be using this API to clear java thrown exception.
704 // So just mark jvmti thread exception state as exception caught.
705 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
706 if (state != NULL && state->is_exception_detected()) {
707 state->set_exception_caught();
708 }
709 thread->clear_pending_exception();
710
711 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
712 JNI_END
713
714
715 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
716 JNIWrapper("FatalError");
717
718 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
719
720 tty->print_cr("FATAL ERROR in native method: %s", msg);
721 thread->print_stack();
722 os::abort(); // Dump core and abort
723 JNI_END
724
725
726 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
727 JNIWrapper("PushLocalFrame");
728
729 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
730
731 //%note jni_11
732 if (capacity < 0 ||
733 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
734 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
735 return JNI_ERR;
736 }
737 JNIHandleBlock* old_handles = thread->active_handles();
738 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
739 assert(new_handles != NULL, "should not be NULL");
740 new_handles->set_pop_frame_link(old_handles);
741 thread->set_active_handles(new_handles);
742 jint ret = JNI_OK;
743 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
744 return ret;
745 JNI_END
746
747
748 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
749 JNIWrapper("PopLocalFrame");
750
751 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
752
753 //%note jni_11
754 Handle result_handle(thread, JNIHandles::resolve(result));
755 JNIHandleBlock* old_handles = thread->active_handles();
756 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
757 if (new_handles != NULL) {
758 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
759 // This way code will still work if PopLocalFrame is called without a corresponding
760 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
761 // the release_block call will release the blocks.
762 thread->set_active_handles(new_handles);
763 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
764 JNIHandleBlock::release_block(old_handles, thread); // may block
765 result = JNIHandles::make_local(thread, result_handle());
766 }
767 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
768 return result;
769 JNI_END
770
771
772 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
773 JNIWrapper("NewGlobalRef");
774
775 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
776
777 Handle ref_handle(thread, JNIHandles::resolve(ref));
778 jobject ret = JNIHandles::make_global(ref_handle);
779
780 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
781 return ret;
782 JNI_END
783
784 // Must be JNI_ENTRY (with HandleMark)
785 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
786 JNIWrapper("DeleteGlobalRef");
787
788 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
789
790 JNIHandles::destroy_global(ref);
791
792 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
793 JNI_END
794
795 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
796 JNIWrapper("DeleteLocalRef");
797
798 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
799
800 JNIHandles::destroy_local(obj);
801
802 HOTSPOT_JNI_DELETELOCALREF_RETURN();
803 JNI_END
804
805 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
806 JNIWrapper("IsSameObject");
807
808 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
809
810 oop a = JNIHandles::resolve(r1);
811 oop b = JNIHandles::resolve(r2);
812 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
813
814 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
815 return ret;
816 JNI_END
817
818
819 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
820 JNIWrapper("NewLocalRef");
821
822 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
823
824 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
825
826 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
827 return ret;
828 JNI_END
829
830 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
831 JNIWrapper("EnsureLocalCapacity");
832
833 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
834
835 jint ret;
836 if (capacity >= 0 &&
837 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
838 ret = JNI_OK;
839 } else {
840 ret = JNI_ERR;
841 }
842
843 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
844 return ret;
845 JNI_END
846
847 // Return the Handle Type
848 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
849 JNIWrapper("GetObjectRefType");
850
851 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
852
853 jobjectRefType ret;
854 if (JNIHandles::is_local_handle(thread, obj) ||
855 JNIHandles::is_frame_handle(thread, obj))
856 ret = JNILocalRefType;
857 else if (JNIHandles::is_global_handle(obj))
858 ret = JNIGlobalRefType;
859 else if (JNIHandles::is_weak_global_handle(obj))
860 ret = JNIWeakGlobalRefType;
861 else
862 ret = JNIInvalidRefType;
863
864 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
865 return ret;
866 JNI_END
867
868
869 class JNI_ArgumentPusher : public SignatureIterator {
870 protected:
871 JavaCallArguments* _arguments;
872
873 virtual void get_bool () = 0;
874 virtual void get_char () = 0;
875 virtual void get_short () = 0;
876 virtual void get_byte () = 0;
877 virtual void get_int () = 0;
878 virtual void get_long () = 0;
879 virtual void get_float () = 0;
880 virtual void get_double () = 0;
881 virtual void get_object () = 0;
882
883 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
884 this->_return_type = T_ILLEGAL;
885 _arguments = NULL;
886 }
887
888 public:
889 virtual void iterate( uint64_t fingerprint ) = 0;
890
891 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
892
893 inline void do_bool() { if (!is_return_type()) get_bool(); }
894 inline void do_char() { if (!is_return_type()) get_char(); }
895 inline void do_short() { if (!is_return_type()) get_short(); }
896 inline void do_byte() { if (!is_return_type()) get_byte(); }
897 inline void do_int() { if (!is_return_type()) get_int(); }
898 inline void do_long() { if (!is_return_type()) get_long(); }
899 inline void do_float() { if (!is_return_type()) get_float(); }
900 inline void do_double() { if (!is_return_type()) get_double(); }
901 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
902 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
903 inline void do_void() { }
904
905 JavaCallArguments* arguments() { return _arguments; }
906 void push_receiver(Handle h) { _arguments->push_oop(h); }
907 };
908
909
910 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
911 protected:
912 va_list _ap;
913
914 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
915 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
916 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
917 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
918 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
919
920 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
921
922 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
923 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
924 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
925 inline void get_object() { jobject l = va_arg(_ap, jobject);
926 _arguments->push_oop(Handle((oop *)l, false)); }
927
928 inline void set_ap(va_list rap) {
929 #ifdef va_copy
930 va_copy(_ap, rap);
931 #elif defined (__va_copy)
932 __va_copy(_ap, rap);
933 #else
934 _ap = rap;
935 #endif
936 }
937
938 public:
939 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
940 : JNI_ArgumentPusher(signature) {
941 set_ap(rap);
942 }
943 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
944 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
945 set_ap(rap);
946 }
947
948 // Optimized path if we have the bitvector form of signature
949 void iterate( uint64_t fingerprint ) {
950 if (fingerprint == (uint64_t)CONST64(-1)) {
951 SignatureIterator::iterate(); // Must be too many arguments
952 } else {
953 _return_type = (BasicType)((fingerprint >> static_feature_size) &
954 result_feature_mask);
955
956 assert(fingerprint, "Fingerprint should not be 0");
957 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
958 while ( 1 ) {
959 switch ( fingerprint & parameter_feature_mask ) {
960 case bool_parm:
961 case char_parm:
962 case short_parm:
963 case byte_parm:
964 case int_parm:
965 get_int();
966 break;
967 case obj_parm:
968 get_object();
969 break;
970 case long_parm:
971 get_long();
972 break;
973 case float_parm:
974 get_float();
975 break;
976 case double_parm:
977 get_double();
978 break;
979 case done_parm:
980 return;
981 break;
982 default:
983 ShouldNotReachHere();
984 break;
985 }
986 fingerprint >>= parameter_feature_size;
987 }
988 }
989 }
990 };
991
992
993 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
994 protected:
995 const jvalue *_ap;
996
997 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
998 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
999 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1000 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1001 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1002
1003 inline void get_long() { _arguments->push_long((_ap++)->j); }
1004 inline void get_float() { _arguments->push_float((_ap++)->f); }
1005 inline void get_double() { _arguments->push_double((_ap++)->d);}
1006 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1007
1008 inline void set_ap(const jvalue *rap) { _ap = rap; }
1009
1010 public:
1011 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1012 : JNI_ArgumentPusher(signature) {
1013 set_ap(rap);
1014 }
1015 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1016 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1017 set_ap(rap);
1018 }
1019
1020 // Optimized path if we have the bitvector form of signature
1021 void iterate( uint64_t fingerprint ) {
1022 if (fingerprint == (uint64_t)CONST64(-1)) {
1023 SignatureIterator::iterate(); // Must be too many arguments
1024 } else {
1025 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1026 result_feature_mask);
1027 assert(fingerprint, "Fingerprint should not be 0");
1028 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1029 while ( 1 ) {
1030 switch ( fingerprint & parameter_feature_mask ) {
1031 case bool_parm:
1032 get_bool();
1033 break;
1034 case char_parm:
1035 get_char();
1036 break;
1037 case short_parm:
1038 get_short();
1039 break;
1040 case byte_parm:
1041 get_byte();
1042 break;
1043 case int_parm:
1044 get_int();
1045 break;
1046 case obj_parm:
1047 get_object();
1048 break;
1049 case long_parm:
1050 get_long();
1051 break;
1052 case float_parm:
1053 get_float();
1054 break;
1055 case double_parm:
1056 get_double();
1057 break;
1058 case done_parm:
1059 return;
1060 break;
1061 default:
1062 ShouldNotReachHere();
1063 break;
1064 }
1065 fingerprint >>= parameter_feature_size;
1066 }
1067 }
1068 }
1069 };
1070
1071
1072 enum JNICallType {
1073 JNI_STATIC,
1074 JNI_VIRTUAL,
1075 JNI_NONVIRTUAL
1076 };
1077
1078
1079
1080 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1081 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1082
1083 // Create object to hold arguments for the JavaCall, and associate it with
1084 // the jni parser
1085 ResourceMark rm(THREAD);
1086 int number_of_parameters = method->size_of_parameters();
1087 JavaCallArguments java_args(number_of_parameters);
1088 args->set_java_argument_object(&java_args);
1089
1090 assert(method->is_static(), "method should be static");
1091
1092 // Fill out JavaCallArguments object
1093 args->iterate( Fingerprinter(method).fingerprint() );
1094 // Initialize result type
1095 result->set_type(args->get_ret_type());
1096
1097 // Invoke the method. Result is returned as oop.
1098 JavaCalls::call(result, method, &java_args, CHECK);
1099
1100 // Convert result
1101 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1102 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1103 }
1104 }
1105
1106
1107 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1108 oop recv = JNIHandles::resolve(receiver);
1109 if (recv == NULL) {
1110 THROW(vmSymbols::java_lang_NullPointerException());
1111 }
1112 Handle h_recv(THREAD, recv);
1113
1114 int number_of_parameters;
1115 Method* selected_method;
1116 {
1117 Method* m = Method::resolve_jmethod_id(method_id);
1118 number_of_parameters = m->size_of_parameters();
1119 Klass* holder = m->method_holder();
1120 if (call_type != JNI_VIRTUAL) {
1121 selected_method = m;
1122 } else if (!m->has_itable_index()) {
1123 // non-interface call -- for that little speed boost, don't handlize
1124 debug_only(No_Safepoint_Verifier nosafepoint;)
1125 // jni_GetMethodID makes sure class is linked and initialized
1126 // so m should have a valid vtable index.
1127 assert(m->valid_vtable_index(), "no valid vtable 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 // interface call
1141 KlassHandle h_holder(THREAD, holder);
1142
1143 int itbl_index = m->itable_index();
1144 Klass* k = h_recv->klass();
1145 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1146 }
1147 }
1148
1149 methodHandle method(THREAD, selected_method);
1150
1151 // Create object to hold arguments for the JavaCall, and associate it with
1152 // the jni parser
1153 ResourceMark rm(THREAD);
1154 JavaCallArguments java_args(number_of_parameters);
1155 args->set_java_argument_object(&java_args);
1156
1157 // handle arguments
1158 assert(!method->is_static(), "method should not be static");
1159 args->push_receiver(h_recv); // Push jobject handle
1160
1161 // Fill out JavaCallArguments object
1162 args->iterate( Fingerprinter(method).fingerprint() );
1163 // Initialize result type
1164 result->set_type(args->get_ret_type());
1165
1166 // Invoke the method. Result is returned as oop.
1167 JavaCalls::call(result, method, &java_args, CHECK);
1168
1169 // Convert result
1170 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1171 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1172 }
1173 }
1174
1175
1176 static instanceOop alloc_object(jclass clazz, TRAPS) {
1177 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1178 if (k == NULL) {
1179 ResourceMark rm(THREAD);
1180 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1181 }
1182 k()->check_valid_for_instantiation(false, CHECK_NULL);
1183 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1184 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1185 return ih;
1186 }
1187
1188 DT_RETURN_MARK_DECL(AllocObject, jobject
1189 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1190
1191 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1192 JNIWrapper("AllocObject");
1193
1194 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1195
1196 jobject ret = NULL;
1197 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1198
1199 instanceOop i = alloc_object(clazz, CHECK_NULL);
1200 ret = JNIHandles::make_local(env, i);
1201 return ret;
1202 JNI_END
1203
1204 DT_RETURN_MARK_DECL(NewObjectA, jobject
1205 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1206
1207 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1208 JNIWrapper("NewObjectA");
1209
1210 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1211
1212 jobject obj = NULL;
1213 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1214
1215 instanceOop i = alloc_object(clazz, CHECK_NULL);
1216 obj = JNIHandles::make_local(env, i);
1217 JavaValue jvalue(T_VOID);
1218 JNI_ArgumentPusherArray ap(methodID, args);
1219 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1220 return obj;
1221 JNI_END
1222
1223
1224 DT_RETURN_MARK_DECL(NewObjectV, jobject
1225 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1226
1227 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1228 JNIWrapper("NewObjectV");
1229
1230 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1231
1232 jobject obj = NULL;
1233 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1234
1235 instanceOop i = alloc_object(clazz, CHECK_NULL);
1236 obj = JNIHandles::make_local(env, i);
1237 JavaValue jvalue(T_VOID);
1238 JNI_ArgumentPusherVaArg ap(methodID, args);
1239 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1240 return obj;
1241 JNI_END
1242
1243
1244 DT_RETURN_MARK_DECL(NewObject, jobject
1245 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1246
1247 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1248 JNIWrapper("NewObject");
1249
1250 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1251
1252 jobject obj = NULL;
1253 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1254
1255 instanceOop i = alloc_object(clazz, CHECK_NULL);
1256 obj = JNIHandles::make_local(env, i);
1257 va_list args;
1258 va_start(args, methodID);
1259 JavaValue jvalue(T_VOID);
1260 JNI_ArgumentPusherVaArg ap(methodID, args);
1261 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1262 va_end(args);
1263 return obj;
1264 JNI_END
1265
1266
1267 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1268 JNIWrapper("GetObjectClass");
1269
1270 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1271
1272 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1273 jclass ret =
1274 (jclass) JNIHandles::make_local(env, k->java_mirror());
1275
1276 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1277 return ret;
1278 JNI_END
1279
1280 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1281 JNIWrapper("IsInstanceOf");
1282
1283 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1284
1285 jboolean ret = JNI_TRUE;
1286 if (obj != NULL) {
1287 ret = JNI_FALSE;
1288 Klass* k = java_lang_Class::as_Klass(
1289 JNIHandles::resolve_non_null(clazz));
1290 if (k != NULL) {
1291 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1292 }
1293 }
1294
1295 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1296 return ret;
1297 JNI_END
1298
1299
1300 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1301 const char *sig, bool is_static, TRAPS) {
1302 // %%%% This code should probably just call into a method in the LinkResolver
1303 //
1304 // The class should have been loaded (we have an instance of the class
1305 // passed in) so the method and signature should already be in the symbol
1306 // table. If they're not there, the method doesn't exist.
1307 const char *name_to_probe = (name_str == NULL)
1308 ? vmSymbols::object_initializer_name()->as_C_string()
1309 : name_str;
1310 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1311 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1312
1313 if (name == NULL || signature == NULL) {
1314 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1315 }
1316
1317 // Throw a NoSuchMethodError exception if we have an instance of a
1318 // primitive java.lang.Class
1319 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1320 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1321 }
1322
1323 KlassHandle klass(THREAD,
1324 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1325
1326 // Make sure class is linked and initialized before handing id's out to
1327 // Method*s.
1328 klass()->initialize(CHECK_NULL);
1329
1330 Method* m;
1331 if (name == vmSymbols::object_initializer_name() ||
1332 name == vmSymbols::class_initializer_name()) {
1333 // Never search superclasses for constructors
1334 if (klass->is_instance_klass()) {
1335 m = InstanceKlass::cast(klass())->find_method(name, signature);
1336 } else {
1337 m = NULL;
1338 }
1339 } else {
1340 m = klass->lookup_method(name, signature);
1341 if (m == NULL && klass->is_instance_klass()) {
1342 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1343 }
1344 }
1345 if (m == NULL || (m->is_static() != is_static)) {
1346 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1347 }
1348 return m->jmethod_id();
1349 }
1350
1351
1352 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1353 const char *name, const char *sig))
1354 JNIWrapper("GetMethodID");
1355 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1356 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1357 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1358 return ret;
1359 JNI_END
1360
1361
1362 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1363 const char *name, const char *sig))
1364 JNIWrapper("GetStaticMethodID");
1365 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1366 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1367 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1368 return ret;
1369 JNI_END
1370
1371
1372
1373 //
1374 // Calling Methods
1375 //
1376
1377
1378 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1379 , EntryProbe, ReturnProbe) \
1380 \
1381 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1382 , ReturnProbe); \
1383 \
1384 JNI_ENTRY(ResultType, \
1385 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1386 JNIWrapper("Call" XSTR(Result) "Method"); \
1387 \
1388 EntryProbe; \
1389 ResultType ret = 0;\
1390 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1391 (const ResultType&)ret);\
1392 \
1393 va_list args; \
1394 va_start(args, methodID); \
1395 JavaValue jvalue(Tag); \
1396 JNI_ArgumentPusherVaArg ap(methodID, args); \
1397 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1398 va_end(args); \
1399 ret = jvalue.get_##ResultType(); \
1400 return ret;\
1401 JNI_END
1402
1403 // the runtime type of subword integral basic types is integer
1404 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1405 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1406 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1407 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1408 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1409 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1410 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1411 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1412 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1413 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1414 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1415 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1416
1417 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1418 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1419 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1420 DEFINE_CALLMETHOD(jint, Int, T_INT,
1421 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1422 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1423 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1424 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1425 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1426 // Float and double probes don't return value because dtrace doesn't currently support it
1427 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1428 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1430 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1431 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1433
1434 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1435 , EntryProbe, ReturnProbe) \
1436 \
1437 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1438 , ReturnProbe); \
1439 \
1440 JNI_ENTRY(ResultType, \
1441 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1442 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1443 \
1444 EntryProbe;\
1445 ResultType ret = 0;\
1446 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1447 (const ResultType&)ret);\
1448 \
1449 JavaValue jvalue(Tag); \
1450 JNI_ArgumentPusherVaArg ap(methodID, args); \
1451 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1452 ret = jvalue.get_##ResultType(); \
1453 return ret;\
1454 JNI_END
1455
1456 // the runtime type of subword integral basic types is integer
1457 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1458 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1460 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1461 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1462 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1463 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1464 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1465 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1466 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1467 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1468 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1469
1470 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1471 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1472 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1473 DEFINE_CALLMETHODV(jint, Int, T_INT,
1474 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1475 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1476 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1477 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1478 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1479 // Float and double probes don't return value because dtrace doesn't currently support it
1480 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1481 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1483 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1484 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1486
1487 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1488 , EntryProbe, ReturnProbe) \
1489 \
1490 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1491 , ReturnProbe); \
1492 \
1493 JNI_ENTRY(ResultType, \
1494 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1495 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1496 EntryProbe; \
1497 ResultType ret = 0;\
1498 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1499 (const ResultType&)ret);\
1500 \
1501 JavaValue jvalue(Tag); \
1502 JNI_ArgumentPusherArray ap(methodID, args); \
1503 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1504 ret = jvalue.get_##ResultType(); \
1505 return ret;\
1506 JNI_END
1507
1508 // the runtime type of subword integral basic types is integer
1509 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1510 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1511 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1512 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1513 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1514 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1515 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1516 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1517 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1518 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1519 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1520 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1521
1522 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1523 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1524 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1525 DEFINE_CALLMETHODA(jint, Int, T_INT,
1526 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1527 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1528 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1529 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1530 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1531 // Float and double probes don't return value because dtrace doesn't currently support it
1532 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1533 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1535 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1536 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1538
1539 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1540 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1541 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1542
1543
1544 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1545 JNIWrapper("CallVoidMethod");
1546 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1547 DT_VOID_RETURN_MARK(CallVoidMethod);
1548
1549 va_list args;
1550 va_start(args, methodID);
1551 JavaValue jvalue(T_VOID);
1552 JNI_ArgumentPusherVaArg ap(methodID, args);
1553 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1554 va_end(args);
1555 JNI_END
1556
1557
1558 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1559 JNIWrapper("CallVoidMethodV");
1560 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1561 DT_VOID_RETURN_MARK(CallVoidMethodV);
1562
1563 JavaValue jvalue(T_VOID);
1564 JNI_ArgumentPusherVaArg ap(methodID, args);
1565 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1566 JNI_END
1567
1568
1569 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1570 JNIWrapper("CallVoidMethodA");
1571 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1572 DT_VOID_RETURN_MARK(CallVoidMethodA);
1573
1574 JavaValue jvalue(T_VOID);
1575 JNI_ArgumentPusherArray ap(methodID, args);
1576 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1577 JNI_END
1578
1579
1580
1581 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1582 , EntryProbe, ReturnProbe) \
1583 \
1584 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1585 , ReturnProbe);\
1586 \
1587 JNI_ENTRY(ResultType, \
1588 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1589 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1590 \
1591 EntryProbe;\
1592 ResultType ret;\
1593 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1594 (const ResultType&)ret);\
1595 \
1596 va_list args; \
1597 va_start(args, methodID); \
1598 JavaValue jvalue(Tag); \
1599 JNI_ArgumentPusherVaArg ap(methodID, args); \
1600 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1601 va_end(args); \
1602 ret = jvalue.get_##ResultType(); \
1603 return ret;\
1604 JNI_END
1605
1606 // the runtime type of subword integral basic types is integer
1607 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1608 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1609 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1610 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1611 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1612 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1613 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1614 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1615 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1616 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1617 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1618 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1619
1620 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1621 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1622 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1623 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1624 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1625 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1626 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1627 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1628 // Float and double probes don't return value because dtrace doesn't currently support it
1629 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1631 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1633 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1634 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1636
1637 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1638 , EntryProbe, ReturnProbe) \
1639 \
1640 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1641 , ReturnProbe);\
1642 \
1643 JNI_ENTRY(ResultType, \
1644 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1645 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1646 \
1647 EntryProbe;\
1648 ResultType ret;\
1649 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1650 (const ResultType&)ret);\
1651 \
1652 JavaValue jvalue(Tag); \
1653 JNI_ArgumentPusherVaArg ap(methodID, args); \
1654 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1655 ret = jvalue.get_##ResultType(); \
1656 return ret;\
1657 JNI_END
1658
1659 // the runtime type of subword integral basic types is integer
1660 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1661 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1663 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1664 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1665 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1666 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1667 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1668 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1669 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1670 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1671 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1672
1673 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1674 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1675 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1676 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1677 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1678 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1679 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1680 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1681 // Float and double probes don't return value because dtrace doesn't currently support it
1682 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1684 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1686 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1687 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1689
1690 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1691 , EntryProbe, ReturnProbe) \
1692 \
1693 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1694 , ReturnProbe);\
1695 \
1696 JNI_ENTRY(ResultType, \
1697 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1698 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1699 \
1700 EntryProbe;\
1701 ResultType ret;\
1702 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1703 (const ResultType&)ret);\
1704 \
1705 JavaValue jvalue(Tag); \
1706 JNI_ArgumentPusherArray ap(methodID, args); \
1707 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1708 ret = jvalue.get_##ResultType(); \
1709 return ret;\
1710 JNI_END
1711
1712 // the runtime type of subword integral basic types is integer
1713 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1714 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1716 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1717 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1718 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1719 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1720 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1721 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1722 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1723 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1724 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1725
1726 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1727 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1728 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1729 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1730 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1731 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1732 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1733 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1734 // Float and double probes don't return value because dtrace doesn't currently support it
1735 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1737 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1739 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1740 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1742
1743 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1744 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1745 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1746 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1747 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1748 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1749
1750 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1751 JNIWrapper("CallNonvirtualVoidMethod");
1752
1753 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1754 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1755
1756 va_list args;
1757 va_start(args, methodID);
1758 JavaValue jvalue(T_VOID);
1759 JNI_ArgumentPusherVaArg ap(methodID, args);
1760 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1761 va_end(args);
1762 JNI_END
1763
1764
1765 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1766 JNIWrapper("CallNonvirtualVoidMethodV");
1767
1768 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1769 env, obj, cls, (uintptr_t) methodID);
1770 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1771
1772 JavaValue jvalue(T_VOID);
1773 JNI_ArgumentPusherVaArg ap(methodID, args);
1774 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1775 JNI_END
1776
1777
1778 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1779 JNIWrapper("CallNonvirtualVoidMethodA");
1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1781 env, obj, cls, (uintptr_t) methodID);
1782 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1783 JavaValue jvalue(T_VOID);
1784 JNI_ArgumentPusherArray ap(methodID, args);
1785 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1786 JNI_END
1787
1788
1789
1790 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1791 , EntryProbe, ResultProbe) \
1792 \
1793 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1794 , ResultProbe); \
1795 \
1796 JNI_ENTRY(ResultType, \
1797 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1798 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1799 \
1800 EntryProbe; \
1801 ResultType ret = 0;\
1802 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1803 (const ResultType&)ret);\
1804 \
1805 va_list args; \
1806 va_start(args, methodID); \
1807 JavaValue jvalue(Tag); \
1808 JNI_ArgumentPusherVaArg ap(methodID, args); \
1809 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1810 va_end(args); \
1811 ret = jvalue.get_##ResultType(); \
1812 return ret;\
1813 JNI_END
1814
1815 // the runtime type of subword integral basic types is integer
1816 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1817 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1818 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1819 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1820 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1821 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1822 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1823 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1824 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1825 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1826 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1827 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1828
1829 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1830 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1831 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1832 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1833 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1834 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1835 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1836 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1837 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1838 // Float and double probes don't return value because dtrace doesn't currently support it
1839 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1840 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1842 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1843 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1845
1846 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1847 , EntryProbe, ResultProbe) \
1848 \
1849 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1850 , ResultProbe); \
1851 \
1852 JNI_ENTRY(ResultType, \
1853 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1854 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1855 \
1856 EntryProbe; \
1857 ResultType ret = 0;\
1858 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1859 (const ResultType&)ret);\
1860 \
1861 JavaValue jvalue(Tag); \
1862 JNI_ArgumentPusherVaArg ap(methodID, args); \
1863 /* Make sure class is initialized before trying to invoke its method */ \
1864 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1865 k()->initialize(CHECK_0); \
1866 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1867 va_end(args); \
1868 ret = jvalue.get_##ResultType(); \
1869 return ret;\
1870 JNI_END
1871
1872 // the runtime type of subword integral basic types is integer
1873 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1874 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1875 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1876 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1877 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1878 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1879 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1880 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1881 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1882 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1883 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1884 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1885
1886 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1887 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1888 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1889 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1890 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1891 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1892 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1893 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1894 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1895 // Float and double probes don't return value because dtrace doesn't currently support it
1896 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1897 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1899 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1900 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1902
1903 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1904 , EntryProbe, ResultProbe) \
1905 \
1906 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1907 , ResultProbe); \
1908 \
1909 JNI_ENTRY(ResultType, \
1910 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1911 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1912 \
1913 EntryProbe; \
1914 ResultType ret = 0;\
1915 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1916 (const ResultType&)ret);\
1917 \
1918 JavaValue jvalue(Tag); \
1919 JNI_ArgumentPusherArray ap(methodID, args); \
1920 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1921 ret = jvalue.get_##ResultType(); \
1922 return ret;\
1923 JNI_END
1924
1925 // the runtime type of subword integral basic types is integer
1926 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1927 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1928 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1929 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1930 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1931 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1932 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1933 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1934 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1935 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1936 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1937 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1938
1939 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1940 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1941 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1942 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1943 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1944 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1945 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1946 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1947 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1948 // Float and double probes don't return value because dtrace doesn't currently support it
1949 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1950 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1952 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1953 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1955
1956 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1957 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1958 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1959 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1960 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1961 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1962
1963 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1964 JNIWrapper("CallStaticVoidMethod");
1965 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1966 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1967
1968 va_list args;
1969 va_start(args, methodID);
1970 JavaValue jvalue(T_VOID);
1971 JNI_ArgumentPusherVaArg ap(methodID, args);
1972 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1973 va_end(args);
1974 JNI_END
1975
1976
1977 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1978 JNIWrapper("CallStaticVoidMethodV");
1979 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1980 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1981
1982 JavaValue jvalue(T_VOID);
1983 JNI_ArgumentPusherVaArg ap(methodID, args);
1984 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1985 JNI_END
1986
1987
1988 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
1989 JNIWrapper("CallStaticVoidMethodA");
1990 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
1991 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
1992
1993 JavaValue jvalue(T_VOID);
1994 JNI_ArgumentPusherArray ap(methodID, args);
1995 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1996 JNI_END
1997
1998
1999 //
2000 // Accessing Fields
2001 //
2002
2003
2004 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2005 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2006
2007 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2008 const char *name, const char *sig))
2009 JNIWrapper("GetFieldID");
2010 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2011 jfieldID ret = 0;
2012 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2013
2014 // The class should have been loaded (we have an instance of the class
2015 // passed in) so the field and signature should already be in the symbol
2016 // table. If they're not there, the field doesn't exist.
2017 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2018 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2019 if (fieldname == NULL || signame == NULL) {
2020 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2021 }
2022 KlassHandle k(THREAD,
2023 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2024 // Make sure class is initialized before handing id's out to fields
2025 k()->initialize(CHECK_NULL);
2026
2027 fieldDescriptor fd;
2028 if (!k()->is_instance_klass() ||
2029 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2030 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2031 }
2032
2033 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2034 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2035 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2036 return ret;
2037 JNI_END
2038
2039
2040 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2041 JNIWrapper("GetObjectField");
2042 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2043 oop o = JNIHandles::resolve_non_null(obj);
2044 Klass* k = o->klass();
2045 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2046 // Keep JVMTI addition small and only check enabled flag here.
2047 // jni_GetField_probe() assumes that is okay to create handles.
2048 if (JvmtiExport::should_post_field_access()) {
2049 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2050 }
2051 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2052 #if INCLUDE_ALL_GCS
2053 // If G1 is enabled and we are accessing the value of the referent
2054 // field in a reference object then we need to register a non-null
2055 // referent with the SATB barrier.
2056 if (UseG1GC) {
2057 bool needs_barrier = false;
2058
2059 if (ret != NULL &&
2060 offset == java_lang_ref_Reference::referent_offset &&
2061 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2062 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2063 needs_barrier = true;
2064 }
2065
2066 if (needs_barrier) {
2067 oop referent = JNIHandles::resolve(ret);
2068 G1SATBCardTableModRefBS::enqueue(referent);
2069 }
2070 }
2071 #endif // INCLUDE_ALL_GCS
2072 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2073 return ret;
2074 JNI_END
2075
2076
2077
2078 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2079 , EntryProbe, ReturnProbe) \
2080 \
2081 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2082 , ReturnProbe); \
2083 \
2084 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2085 JNIWrapper("Get" XSTR(Result) "Field"); \
2086 \
2087 EntryProbe; \
2088 Return ret = 0;\
2089 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2090 \
2091 oop o = JNIHandles::resolve_non_null(obj); \
2092 Klass* k = o->klass(); \
2093 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2094 /* Keep JVMTI addition small and only check enabled flag here. */ \
2095 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2096 /* and creates a ResetNoHandleMark. */ \
2097 if (JvmtiExport::should_post_field_access()) { \
2098 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2099 } \
2100 ret = o->Fieldname##_field(offset); \
2101 return ret; \
2102 JNI_END
2103
2104 DEFINE_GETFIELD(jboolean, bool, Boolean
2105 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2106 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2107 DEFINE_GETFIELD(jbyte, byte, Byte
2108 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2109 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2110 DEFINE_GETFIELD(jchar, char, Char
2111 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2113 DEFINE_GETFIELD(jshort, short, Short
2114 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2116 DEFINE_GETFIELD(jint, int, Int
2117 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2118 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2119 DEFINE_GETFIELD(jlong, long, Long
2120 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2122 // Float and double probes don't return value because dtrace doesn't currently support it
2123 DEFINE_GETFIELD(jfloat, float, Float
2124 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2126 DEFINE_GETFIELD(jdouble, double, Double
2127 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2128 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2129
2130 address jni_GetBooleanField_addr() {
2131 return (address)jni_GetBooleanField;
2132 }
2133 address jni_GetByteField_addr() {
2134 return (address)jni_GetByteField;
2135 }
2136 address jni_GetCharField_addr() {
2137 return (address)jni_GetCharField;
2138 }
2139 address jni_GetShortField_addr() {
2140 return (address)jni_GetShortField;
2141 }
2142 address jni_GetIntField_addr() {
2143 return (address)jni_GetIntField;
2144 }
2145 address jni_GetLongField_addr() {
2146 return (address)jni_GetLongField;
2147 }
2148 address jni_GetFloatField_addr() {
2149 return (address)jni_GetFloatField;
2150 }
2151 address jni_GetDoubleField_addr() {
2152 return (address)jni_GetDoubleField;
2153 }
2154
2155 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2156 JNIWrapper("SetObjectField");
2157 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2158 oop o = JNIHandles::resolve_non_null(obj);
2159 Klass* k = o->klass();
2160 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2161 // Keep JVMTI addition small and only check enabled flag here.
2162 // jni_SetField_probe_nh() assumes that is not okay to create handles
2163 // and creates a ResetNoHandleMark.
2164 if (JvmtiExport::should_post_field_modification()) {
2165 jvalue field_value;
2166 field_value.l = value;
2167 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2168 }
2169 o->obj_field_put(offset, JNIHandles::resolve(value));
2170 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2171 JNI_END
2172
2173
2174 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2175 , EntryProbe, ReturnProbe) \
2176 \
2177 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2178 JNIWrapper("Set" XSTR(Result) "Field"); \
2179 \
2180 EntryProbe; \
2181 \
2182 oop o = JNIHandles::resolve_non_null(obj); \
2183 Klass* k = o->klass(); \
2184 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2185 /* Keep JVMTI addition small and only check enabled flag here. */ \
2186 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2187 /* and creates a ResetNoHandleMark. */ \
2188 if (JvmtiExport::should_post_field_modification()) { \
2189 jvalue field_value; \
2190 field_value.unionType = value; \
2191 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2192 } \
2193 o->Fieldname##_field_put(offset, value); \
2194 ReturnProbe; \
2195 JNI_END
2196
2197 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2198 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2199 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2200 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2201 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2202 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2203 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2204 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2205 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2206 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2207 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2208 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2209 DEFINE_SETFIELD(jint, int, Int, 'I', i
2210 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2211 HOTSPOT_JNI_SETINTFIELD_RETURN())
2212 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2213 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2214 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2215 // Float and double probes don't return value because dtrace doesn't currently support it
2216 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2217 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2218 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2219 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2220 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2221 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2222
2223 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2224 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2225
2226 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2227 JNIWrapper("ToReflectedField");
2228 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2229 jobject ret = NULL;
2230 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2231
2232 fieldDescriptor fd;
2233 bool found = false;
2234 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2235
2236 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2237
2238 if (isStatic) {
2239 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2240 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2241 assert(id->is_static_field_id(), "invalid static field id");
2242 found = id->find_local_field(&fd);
2243 } else {
2244 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2245 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2246 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2247 }
2248 assert(found, "bad fieldID passed into jni_ToReflectedField");
2249 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2250 ret = JNIHandles::make_local(env, reflected);
2251 return ret;
2252 JNI_END
2253
2254
2255 //
2256 // Accessing Static Fields
2257 //
2258 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2259 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2260
2261 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2262 const char *name, const char *sig))
2263 JNIWrapper("GetStaticFieldID");
2264 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2265 jfieldID ret = NULL;
2266 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2267
2268 // The class should have been loaded (we have an instance of the class
2269 // passed in) so the field and signature should already be in the symbol
2270 // table. If they're not there, the field doesn't exist.
2271 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2272 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2273 if (fieldname == NULL || signame == NULL) {
2274 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2275 }
2276 KlassHandle k(THREAD,
2277 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2278 // Make sure class is initialized before handing id's out to static fields
2279 k()->initialize(CHECK_NULL);
2280
2281 fieldDescriptor fd;
2282 if (!k()->is_instance_klass() ||
2283 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2284 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2285 }
2286
2287 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2288 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2289 debug_only(id->set_is_static_field_id();)
2290
2291 debug_only(id->verify(fd.field_holder()));
2292
2293 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2294 return ret;
2295 JNI_END
2296
2297
2298 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2299 JNIWrapper("GetStaticObjectField");
2300 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2301 #if INCLUDE_JNI_CHECK
2302 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2303 #endif // INCLUDE_JNI_CHECK
2304 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2305 assert(id->is_static_field_id(), "invalid static field id");
2306 // Keep JVMTI addition small and only check enabled flag here.
2307 // jni_GetField_probe() assumes that is okay to create handles.
2308 if (JvmtiExport::should_post_field_access()) {
2309 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2310 }
2311 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2312 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2313 return ret;
2314 JNI_END
2315
2316
2317 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2318 , EntryProbe, ReturnProbe) \
2319 \
2320 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2321 , ReturnProbe); \
2322 \
2323 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2324 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2325 EntryProbe; \
2326 Return ret = 0;\
2327 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2328 (const Return&)ret);\
2329 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2330 assert(id->is_static_field_id(), "invalid static field id"); \
2331 /* Keep JVMTI addition small and only check enabled flag here. */ \
2332 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2333 if (JvmtiExport::should_post_field_access()) { \
2334 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2335 } \
2336 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2337 return ret;\
2338 JNI_END
2339
2340 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2341 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2342 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2343 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jchar, char, Char
2345 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jshort, short, Short
2347 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2348 DEFINE_GETSTATICFIELD(jint, int, Int
2349 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2350 DEFINE_GETSTATICFIELD(jlong, long, Long
2351 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2352 // Float and double probes don't return value because dtrace doesn't currently support it
2353 DEFINE_GETSTATICFIELD(jfloat, float, Float
2354 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2355 DEFINE_GETSTATICFIELD(jdouble, double, Double
2356 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2357
2358 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2359 JNIWrapper("SetStaticObjectField");
2360 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2361 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2362 assert(id->is_static_field_id(), "invalid static field id");
2363 // Keep JVMTI addition small and only check enabled flag here.
2364 // jni_SetField_probe() assumes that is okay to create handles.
2365 if (JvmtiExport::should_post_field_modification()) {
2366 jvalue field_value;
2367 field_value.l = value;
2368 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2369 }
2370 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2371 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2372 JNI_END
2373
2374
2375
2376 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2377 , EntryProbe, ReturnProbe) \
2378 \
2379 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2380 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2381 EntryProbe; \
2382 \
2383 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2384 assert(id->is_static_field_id(), "invalid static field id"); \
2385 /* Keep JVMTI addition small and only check enabled flag here. */ \
2386 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2387 if (JvmtiExport::should_post_field_modification()) { \
2388 jvalue field_value; \
2389 field_value.unionType = value; \
2390 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2391 } \
2392 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2393 ReturnProbe;\
2394 JNI_END
2395
2396 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2397 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2398 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2399 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2400 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2401 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2402 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2403 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2404 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2405 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2406 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2407 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2408 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2409 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2410 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2411 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2412 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2413 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2414 // Float and double probes don't return value because dtrace doesn't currently support it
2415 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2416 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2417 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2418 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2419 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2420 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2421
2422 //
2423 // String Operations
2424 //
2425
2426 // Unicode Interface
2427
2428 DT_RETURN_MARK_DECL(NewString, jstring
2429 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2430
2431 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2432 JNIWrapper("NewString");
2433 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2434 jstring ret = NULL;
2435 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2436 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2437 ret = (jstring) JNIHandles::make_local(env, string);
2438 return ret;
2439 JNI_END
2440
2441
2442 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2443 JNIWrapper("GetStringLength");
2444 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2445 jsize ret = 0;
2446 oop s = JNIHandles::resolve_non_null(string);
2447 if (java_lang_String::value(s) != NULL) {
2448 ret = java_lang_String::length(s);
2449 }
2450 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2451 return ret;
2452 JNI_END
2453
2454
2455 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2456 JNIEnv *env, jstring string, jboolean *isCopy))
2457 JNIWrapper("GetStringChars");
2458 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2459 jchar* buf = NULL;
2460 oop s = JNIHandles::resolve_non_null(string);
2461 typeArrayOop s_value = java_lang_String::value(s);
2462 if (s_value != NULL) {
2463 int s_len = java_lang_String::length(s);
2464 bool is_latin1 = java_lang_String::is_latin1(s);
2465 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2466 /* JNI Specification states return NULL on OOM */
2467 if (buf != NULL) {
2468 if (s_len > 0) {
2469 if (!is_latin1) {
2470 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2471 } else {
2472 for (int i = 0; i < s_len; i++) {
2473 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2474 }
2475 }
2476 }
2477 buf[s_len] = 0;
2478 //%note jni_5
2479 if (isCopy != NULL) {
2480 *isCopy = JNI_TRUE;
2481 }
2482 }
2483 }
2484 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2485 return buf;
2486 JNI_END
2487
2488
2489 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2490 JNIWrapper("ReleaseStringChars");
2491 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2492 //%note jni_6
2493 if (chars != NULL) {
2494 // Since String objects are supposed to be immutable, don't copy any
2495 // new data back. A bad user will have to go after the char array.
2496 FreeHeap((void*) chars);
2497 }
2498 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2499 JNI_END
2500
2501
2502 // UTF Interface
2503
2504 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2505 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2506
2507 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2508 JNIWrapper("NewStringUTF");
2509 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2510 jstring ret;
2511 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2512
2513 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2514 ret = (jstring) JNIHandles::make_local(env, result);
2515 return ret;
2516 JNI_END
2517
2518
2519 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2520 JNIWrapper("GetStringUTFLength");
2521 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2522 jsize ret = 0;
2523 oop java_string = JNIHandles::resolve_non_null(string);
2524 if (java_lang_String::value(java_string) != NULL) {
2525 ret = java_lang_String::utf8_length(java_string);
2526 }
2527 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2528 return ret;
2529 JNI_END
2530
2531
2532 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2533 JNIWrapper("GetStringUTFChars");
2534 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2535 char* result = NULL;
2536 oop java_string = JNIHandles::resolve_non_null(string);
2537 if (java_lang_String::value(java_string) != NULL) {
2538 size_t length = java_lang_String::utf8_length(java_string);
2539 /* JNI Specification states return NULL on OOM */
2540 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2541 if (result != NULL) {
2542 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2543 if (isCopy != NULL) {
2544 *isCopy = JNI_TRUE;
2545 }
2546 }
2547 }
2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2549 return result;
2550 JNI_END
2551
2552
2553 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2554 JNIWrapper("ReleaseStringUTFChars");
2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2556 if (chars != NULL) {
2557 FreeHeap((char*) chars);
2558 }
2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2560 JNI_END
2561
2562
2563 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2564 JNIWrapper("GetArrayLength");
2565 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2566 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2567 assert(a->is_array(), "must be array");
2568 jsize ret = a->length();
2569 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2570 return ret;
2571 JNI_END
2572
2573
2574 //
2575 // Object Array Operations
2576 //
2577
2578 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2579 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2580
2581 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2582 JNIWrapper("NewObjectArray");
2583 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2584 jobjectArray ret = NULL;
2585 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2586 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2587 Klass* ako = ek()->array_klass(CHECK_NULL);
2588 KlassHandle ak = KlassHandle(THREAD, ako);
2589 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2590 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2591 oop initial_value = JNIHandles::resolve(initialElement);
2592 if (initial_value != NULL) { // array already initialized with NULL
2593 for (int index = 0; index < length; index++) {
2594 result->obj_at_put(index, initial_value);
2595 }
2596 }
2597 ret = (jobjectArray) JNIHandles::make_local(env, result);
2598 return ret;
2599 JNI_END
2600
2601 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2602 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2603
2604 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2605 JNIWrapper("GetObjectArrayElement");
2606 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2607 jobject ret = NULL;
2608 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2609 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2610 if (a->is_within_bounds(index)) {
2611 ret = JNIHandles::make_local(env, a->obj_at(index));
2612 return ret;
2613 } else {
2614 char buf[jintAsStringSize];
2615 sprintf(buf, "%d", index);
2616 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2617 }
2618 JNI_END
2619
2620 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2621 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2622
2623 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2624 JNIWrapper("SetObjectArrayElement");
2625 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2626 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2627
2628 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2629 oop v = JNIHandles::resolve(value);
2630 if (a->is_within_bounds(index)) {
2631 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2632 a->obj_at_put(index, v);
2633 } else {
2634 THROW(vmSymbols::java_lang_ArrayStoreException());
2635 }
2636 } else {
2637 char buf[jintAsStringSize];
2638 sprintf(buf, "%d", index);
2639 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2640 }
2641 JNI_END
2642
2643
2644
2645 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2646 ,EntryProbe,ReturnProbe) \
2647 \
2648 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2649 , ReturnProbe); \
2650 \
2651 JNI_ENTRY(Return, \
2652 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2653 JNIWrapper("New" XSTR(Result) "Array"); \
2654 EntryProbe; \
2655 Return ret = NULL;\
2656 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2657 \
2658 oop obj= oopFactory::Allocator(len, CHECK_0); \
2659 ret = (Return) JNIHandles::make_local(env, obj); \
2660 return ret;\
2661 JNI_END
2662
2663 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2664 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2665 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2666 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2667 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2668 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2669 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2670 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2671 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2672 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2673 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2674 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2676 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2677 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2679 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2680 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2681 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2682 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2683 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2684 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2685 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2686 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2687
2688 // Return an address which will fault if the caller writes to it.
2689
2690 static char* get_bad_address() {
2691 static char* bad_address = NULL;
2692 if (bad_address == NULL) {
2693 size_t size = os::vm_allocation_granularity();
2694 bad_address = os::reserve_memory(size);
2695 if (bad_address != NULL) {
2696 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2697 /*is_committed*/false);
2698 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2699 }
2700 }
2701 return bad_address;
2702 }
2703
2704
2705
2706 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2707 , EntryProbe, ReturnProbe) \
2708 \
2709 JNI_QUICK_ENTRY(ElementType*, \
2710 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2711 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2712 EntryProbe; \
2713 /* allocate an chunk of memory in c land */ \
2714 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2715 ElementType* result; \
2716 int len = a->length(); \
2717 if (len == 0) { \
2718 /* Empty array: legal but useless, can't return NULL. \
2719 * Return a pointer to something useless. \
2720 * Avoid asserts in typeArrayOop. */ \
2721 result = (ElementType*)get_bad_address(); \
2722 } else { \
2723 /* JNI Specification states return NULL on OOM */ \
2724 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2725 if (result != NULL) { \
2726 /* copy the array to the c chunk */ \
2727 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2728 if (isCopy) { \
2729 *isCopy = JNI_TRUE; \
2730 } \
2731 } \
2732 } \
2733 ReturnProbe; \
2734 return result; \
2735 JNI_END
2736
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2738 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2741 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2744 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2747 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2750 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2752 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2753 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2755 // Float and double probes don't return value because dtrace doesn't currently support it
2756 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2757 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2760 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2762
2763
2764 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2765 , EntryProbe, ReturnProbe);\
2766 \
2767 JNI_QUICK_ENTRY(void, \
2768 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2769 ElementType *buf, jint mode)) \
2770 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2771 EntryProbe; \
2772 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2773 int len = a->length(); \
2774 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2775 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2776 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2777 } \
2778 if ((mode == 0) || (mode == JNI_ABORT)) { \
2779 FreeHeap(buf); \
2780 } \
2781 } \
2782 ReturnProbe; \
2783 JNI_END
2784
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2786 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2789 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2790 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2792 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2795 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2798 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2801 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2802 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2804 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2805 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2807 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2808 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2809
2810
2811 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2812 , EntryProbe, ReturnProbe); \
2813 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2814 , ReturnProbe); \
2815 \
2816 JNI_ENTRY(void, \
2817 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2818 jsize len, ElementType *buf)) \
2819 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2820 EntryProbe; \
2821 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2822 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2823 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2824 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2825 } else { \
2826 if (len > 0) { \
2827 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2828 memcpy((u_char*) buf, \
2829 (u_char*) src->Tag##_at_addr(start), \
2830 len << sc); \
2831 } \
2832 } \
2833 JNI_END
2834
2835 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2836 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2837 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2838 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2839 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2840 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2842 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2843 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2845 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2846 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2848 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2849 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2851 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2852 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2854 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2855 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2856 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2857 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2858 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2859
2860
2861 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2862 , EntryProbe, ReturnProbe); \
2863 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2864 ,ReturnProbe); \
2865 \
2866 JNI_ENTRY(void, \
2867 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2868 jsize len, const ElementType *buf)) \
2869 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2870 EntryProbe; \
2871 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2872 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2873 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2874 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2875 } else { \
2876 if (len > 0) { \
2877 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2878 memcpy((u_char*) dst->Tag##_at_addr(start), \
2879 (u_char*) buf, \
2880 len << sc); \
2881 } \
2882 } \
2883 JNI_END
2884
2885 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2886 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2887 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2889 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2890 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2892 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2895 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2896 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2898 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2899 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2901 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2902 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2904 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2905 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2906 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2907 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2908 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2909
2910
2911 //
2912 // Interception of natives
2913 //
2914
2915 // The RegisterNatives call being attempted tried to register with a method that
2916 // is not native. Ask JVM TI what prefixes have been specified. Then check
2917 // to see if the native method is now wrapped with the prefixes. See the
2918 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2919 static Method* find_prefixed_native(KlassHandle k,
2920 Symbol* name, Symbol* signature, TRAPS) {
2921 #if INCLUDE_JVMTI
2922 ResourceMark rm(THREAD);
2923 Method* method;
2924 int name_len = name->utf8_length();
2925 char* name_str = name->as_utf8();
2926 int prefix_count;
2927 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2928 for (int i = 0; i < prefix_count; i++) {
2929 char* prefix = prefixes[i];
2930 int prefix_len = (int)strlen(prefix);
2931
2932 // try adding this prefix to the method name and see if it matches another method name
2933 int trial_len = name_len + prefix_len;
2934 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2935 strcpy(trial_name_str, prefix);
2936 strcat(trial_name_str, name_str);
2937 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2938 if (trial_name == NULL) {
2939 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2940 }
2941 method = k()->lookup_method(trial_name, signature);
2942 if (method == NULL) {
2943 continue; // signature doesn't match, try the next prefix
2944 }
2945 if (method->is_native()) {
2946 method->set_is_prefixed_native();
2947 return method; // wahoo, we found a prefixed version of the method, return it
2948 }
2949 // found as non-native, so prefix is good, add it, probably just need more prefixes
2950 name_len = trial_len;
2951 name_str = trial_name_str;
2952 }
2953 #endif // INCLUDE_JVMTI
2954 return NULL; // not found
2955 }
2956
2957 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2958 Method* method = k()->lookup_method(name, signature);
2959 if (method == NULL) {
2960 ResourceMark rm;
2961 stringStream st;
2962 st.print("Method %s name or signature does not match",
2963 Method::name_and_sig_as_C_string(k(), name, signature));
2964 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2965 }
2966 if (!method->is_native()) {
2967 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2968 method = find_prefixed_native(k, name, signature, THREAD);
2969 if (method == NULL) {
2970 ResourceMark rm;
2971 stringStream st;
2972 st.print("Method %s is not declared as native",
2973 Method::name_and_sig_as_C_string(k(), name, signature));
2974 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2975 }
2976 }
2977
2978 if (entry != NULL) {
2979 method->set_native_function(entry,
2980 Method::native_bind_event_is_interesting);
2981 } else {
2982 method->clear_native_function();
2983 }
2984 if (PrintJNIResolving) {
2985 ResourceMark rm(THREAD);
2986 tty->print_cr("[Registering JNI native method %s.%s]",
2987 method->method_holder()->external_name(),
2988 method->name()->as_C_string());
2989 }
2990 return true;
2991 }
2992
2993 DT_RETURN_MARK_DECL(RegisterNatives, jint
2994 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2995
2996 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2997 const JNINativeMethod *methods,
2998 jint nMethods))
2999 JNIWrapper("RegisterNatives");
3000 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3001 jint ret = 0;
3002 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3003
3004 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3005
3006 for (int index = 0; index < nMethods; index++) {
3007 const char* meth_name = methods[index].name;
3008 const char* meth_sig = methods[index].signature;
3009 int meth_name_len = (int)strlen(meth_name);
3010
3011 // The class should have been loaded (we have an instance of the class
3012 // passed in) so the method and signature should already be in the symbol
3013 // table. If they're not there, the method doesn't exist.
3014 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3015 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3016
3017 if (name == NULL || signature == NULL) {
3018 ResourceMark rm;
3019 stringStream st;
3020 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3021 // Must return negative value on failure
3022 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3023 }
3024
3025 bool res = register_native(h_k, name, signature,
3026 (address) methods[index].fnPtr, THREAD);
3027 if (!res) {
3028 ret = -1;
3029 break;
3030 }
3031 }
3032 return ret;
3033 JNI_END
3034
3035
3036 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3037 JNIWrapper("UnregisterNatives");
3038 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3040 //%note jni_2
3041 if (k->is_instance_klass()) {
3042 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3043 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3044 if (m->is_native()) {
3045 m->clear_native_function();
3046 m->set_signature_handler(NULL);
3047 }
3048 }
3049 }
3050 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3051 return 0;
3052 JNI_END
3053
3054 //
3055 // Monitor functions
3056 //
3057
3058 DT_RETURN_MARK_DECL(MonitorEnter, jint
3059 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3060
3061 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3062 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3063 jint ret = JNI_ERR;
3064 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3065
3066 // If the object is null, we can't do anything with it
3067 if (jobj == NULL) {
3068 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3069 }
3070
3071 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3072 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3073 ret = JNI_OK;
3074 return ret;
3075 JNI_END
3076
3077 DT_RETURN_MARK_DECL(MonitorExit, jint
3078 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3079
3080 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3081 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3082 jint ret = JNI_ERR;
3083 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3084
3085 // Don't do anything with a null object
3086 if (jobj == NULL) {
3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3088 }
3089
3090 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3091 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3092
3093 ret = JNI_OK;
3094 return ret;
3095 JNI_END
3096
3097 //
3098 // Extensions
3099 //
3100
3101 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3102 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3103
3104 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3105 JNIWrapper("GetStringRegion");
3106 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3107 DT_VOID_RETURN_MARK(GetStringRegion);
3108 oop s = JNIHandles::resolve_non_null(string);
3109 int s_len = java_lang_String::length(s);
3110 if (start < 0 || len < 0 || start + len > s_len) {
3111 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3112 } else {
3113 if (len > 0) {
3114 typeArrayOop s_value = java_lang_String::value(s);
3115 bool is_latin1 = java_lang_String::is_latin1(s);
3116 if (!is_latin1) {
3117 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3118 } else {
3119 for (int i = 0; i < len; i++) {
3120 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3121 }
3122 }
3123 }
3124 }
3125 JNI_END
3126
3127 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3128 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3129
3130 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3131 JNIWrapper("GetStringUTFRegion");
3132 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3133 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3134 oop s = JNIHandles::resolve_non_null(string);
3135 int s_len = java_lang_String::length(s);
3136 if (start < 0 || len < 0 || start + len > s_len) {
3137 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3138 } else {
3139 //%note jni_7
3140 if (len > 0) {
3141 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3142 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3143 // as_utf8_string null-terminates the result string
3144 } else {
3145 // JDK null-terminates the buffer even in len is zero
3146 if (buf != NULL) {
3147 buf[0] = 0;
3148 }
3149 }
3150 }
3151 JNI_END
3152
3153
3154 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3155 JNIWrapper("GetPrimitiveArrayCritical");
3156 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3157 GC_locker::lock_critical(thread);
3158 if (isCopy != NULL) {
3159 *isCopy = JNI_FALSE;
3160 }
3161 oop a = JNIHandles::resolve_non_null(array);
3162 assert(a->is_array(), "just checking");
3163 BasicType type;
3164 if (a->is_objArray()) {
3165 type = T_OBJECT;
3166 } else {
3167 type = TypeArrayKlass::cast(a->klass())->element_type();
3168 }
3169 void* ret = arrayOop(a)->base(type);
3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3171 return ret;
3172 JNI_END
3173
3174
3175 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3176 JNIWrapper("ReleasePrimitiveArrayCritical");
3177 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3178 // The array, carray and mode arguments are ignored
3179 GC_locker::unlock_critical(thread);
3180 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3181 JNI_END
3182
3183
3184 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3185 JNIWrapper("GetStringCritical");
3186 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3187 GC_locker::lock_critical(thread);
3188 oop s = JNIHandles::resolve_non_null(string);
3189 typeArrayOop s_value = java_lang_String::value(s);
3190 bool is_latin1 = java_lang_String::is_latin1(s);
3191 if (isCopy != NULL) {
3192 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3193 }
3194 const jchar* ret;
3195 if (!is_latin1) {
3196 ret = s_value->char_at_addr(0);
3197 } else {
3198 // Inflate latin1 encoded string to UTF16
3199 int s_len = java_lang_String::length(s);
3200 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len, mtInternal);
3201 for (int i = 0; i < s_len; i++) {
3202 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3203 }
3204 ret = &buf[0];
3205 }
3206 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3207 return ret;
3208 JNI_END
3209
3210
3211 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3212 JNIWrapper("ReleaseStringCritical");
3213 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3214 // The str and chars arguments are ignored for UTF16 strings
3215 oop s = JNIHandles::resolve_non_null(str);
3216 bool is_latin1 = java_lang_String::is_latin1(s);
3217 if (is_latin1) {
3218 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3219 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3220 FREE_C_HEAP_ARRAY(jchar, chars);
3221 }
3222 GC_locker::unlock_critical(thread);
3223 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3224 JNI_END
3225
3226
3227 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3228 JNIWrapper("jni_NewWeakGlobalRef");
3229 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3230 Handle ref_handle(thread, JNIHandles::resolve(ref));
3231 jweak ret = JNIHandles::make_weak_global(ref_handle);
3232 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3233 return ret;
3234 JNI_END
3235
3236 // Must be JNI_ENTRY (with HandleMark)
3237 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3238 JNIWrapper("jni_DeleteWeakGlobalRef");
3239 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3240 JNIHandles::destroy_weak_global(ref);
3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3242 JNI_END
3243
3244
3245 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3246 JNIWrapper("jni_ExceptionCheck");
3247 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3248 jni_check_async_exceptions(thread);
3249 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3250 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3251 return ret;
3252 JNI_END
3253
3254
3255 // Initialization state for three routines below relating to
3256 // java.nio.DirectBuffers
3257 static jint directBufferSupportInitializeStarted = 0;
3258 static volatile jint directBufferSupportInitializeEnded = 0;
3259 static volatile jint directBufferSupportInitializeFailed = 0;
3260 static jclass bufferClass = NULL;
3261 static jclass directBufferClass = NULL;
3262 static jclass directByteBufferClass = NULL;
3263 static jmethodID directByteBufferConstructor = NULL;
3264 static jfieldID directBufferAddressField = NULL;
3265 static jfieldID bufferCapacityField = NULL;
3266
3267 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3268 Handle loader; // null (bootstrap) loader
3269 Handle protection_domain; // null protection domain
3270
3271 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3272 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3273
3274 if (TraceClassResolution && result != NULL) {
3275 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3276 }
3277 return result;
3278 }
3279
3280 // These lookups are done with the NULL (bootstrap) ClassLoader to
3281 // circumvent any security checks that would be done by jni_FindClass.
3282 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3283 {
3284 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3285 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3286 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3287 return true;
3288 }
3289 JNI_END
3290
3291
3292 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3293 if (directBufferSupportInitializeFailed) {
3294 return false;
3295 }
3296
3297 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3298 if (!lookupDirectBufferClasses(env)) {
3299 directBufferSupportInitializeFailed = 1;
3300 return false;
3301 }
3302
3303 // Make global references for these
3304 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3305 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3306 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3307
3308 // Get needed field and method IDs
3309 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3310 if (env->ExceptionCheck()) {
3311 env->ExceptionClear();
3312 directBufferSupportInitializeFailed = 1;
3313 return false;
3314 }
3315 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3316 if (env->ExceptionCheck()) {
3317 env->ExceptionClear();
3318 directBufferSupportInitializeFailed = 1;
3319 return false;
3320 }
3321 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3322 if (env->ExceptionCheck()) {
3323 env->ExceptionClear();
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327
3328 if ((directByteBufferConstructor == NULL) ||
3329 (directBufferAddressField == NULL) ||
3330 (bufferCapacityField == NULL)) {
3331 directBufferSupportInitializeFailed = 1;
3332 return false;
3333 }
3334
3335 directBufferSupportInitializeEnded = 1;
3336 } else {
3337 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3338 os::naked_yield();
3339 }
3340 }
3341
3342 return !directBufferSupportInitializeFailed;
3343 }
3344
3345 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3346 {
3347 // thread_from_jni_environment() will block if VM is gone.
3348 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3349
3350 JNIWrapper("jni_NewDirectByteBuffer");
3351 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3352
3353 if (!directBufferSupportInitializeEnded) {
3354 if (!initializeDirectBufferSupport(env, thread)) {
3355 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3356 return NULL;
3357 }
3358 }
3359
3360 // Being paranoid about accidental sign extension on address
3361 jlong addr = (jlong) ((uintptr_t) address);
3362 // NOTE that package-private DirectByteBuffer constructor currently
3363 // takes int capacity
3364 jint cap = (jint) capacity;
3365 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3366 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3367 return ret;
3368 }
3369
3370 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3371 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3372
3373 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3374 {
3375 // thread_from_jni_environment() will block if VM is gone.
3376 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3377
3378 JNIWrapper("jni_GetDirectBufferAddress");
3379 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3380 void* ret = NULL;
3381 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3382
3383 if (!directBufferSupportInitializeEnded) {
3384 if (!initializeDirectBufferSupport(env, thread)) {
3385 return 0;
3386 }
3387 }
3388
3389 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3390 return 0;
3391 }
3392
3393 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3394 return ret;
3395 }
3396
3397 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3398 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3399
3400 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3401 {
3402 // thread_from_jni_environment() will block if VM is gone.
3403 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3404
3405 JNIWrapper("jni_GetDirectBufferCapacity");
3406 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3407 jlong ret = -1;
3408 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3409
3410 if (!directBufferSupportInitializeEnded) {
3411 if (!initializeDirectBufferSupport(env, thread)) {
3412 ret = 0;
3413 return ret;
3414 }
3415 }
3416
3417 if (buf == NULL) {
3418 return -1;
3419 }
3420
3421 if (!env->IsInstanceOf(buf, directBufferClass)) {
3422 return -1;
3423 }
3424
3425 // NOTE that capacity is currently an int in the implementation
3426 ret = env->GetIntField(buf, bufferCapacityField);
3427 return ret;
3428 }
3429
3430
3431 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3432 JNIWrapper("GetVersion");
3433 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3434 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3435 return CurrentVersion;
3436 JNI_END
3437
3438 extern struct JavaVM_ main_vm;
3439
3440 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3441 JNIWrapper("jni_GetJavaVM");
3442 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3443 *vm = (JavaVM *)(&main_vm);
3444 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3445 return JNI_OK;
3446 JNI_END
3447
3448 // Structure containing all jni functions
3449 struct JNINativeInterface_ jni_NativeInterface = {
3450 NULL,
3451 NULL,
3452 NULL,
3453
3454 NULL,
3455
3456 jni_GetVersion,
3457
3458 jni_DefineClass,
3459 jni_FindClass,
3460
3461 jni_FromReflectedMethod,
3462 jni_FromReflectedField,
3463
3464 jni_ToReflectedMethod,
3465
3466 jni_GetSuperclass,
3467 jni_IsAssignableFrom,
3468
3469 jni_ToReflectedField,
3470
3471 jni_Throw,
3472 jni_ThrowNew,
3473 jni_ExceptionOccurred,
3474 jni_ExceptionDescribe,
3475 jni_ExceptionClear,
3476 jni_FatalError,
3477
3478 jni_PushLocalFrame,
3479 jni_PopLocalFrame,
3480
3481 jni_NewGlobalRef,
3482 jni_DeleteGlobalRef,
3483 jni_DeleteLocalRef,
3484 jni_IsSameObject,
3485
3486 jni_NewLocalRef,
3487 jni_EnsureLocalCapacity,
3488
3489 jni_AllocObject,
3490 jni_NewObject,
3491 jni_NewObjectV,
3492 jni_NewObjectA,
3493
3494 jni_GetObjectClass,
3495 jni_IsInstanceOf,
3496
3497 jni_GetMethodID,
3498
3499 jni_CallObjectMethod,
3500 jni_CallObjectMethodV,
3501 jni_CallObjectMethodA,
3502 jni_CallBooleanMethod,
3503 jni_CallBooleanMethodV,
3504 jni_CallBooleanMethodA,
3505 jni_CallByteMethod,
3506 jni_CallByteMethodV,
3507 jni_CallByteMethodA,
3508 jni_CallCharMethod,
3509 jni_CallCharMethodV,
3510 jni_CallCharMethodA,
3511 jni_CallShortMethod,
3512 jni_CallShortMethodV,
3513 jni_CallShortMethodA,
3514 jni_CallIntMethod,
3515 jni_CallIntMethodV,
3516 jni_CallIntMethodA,
3517 jni_CallLongMethod,
3518 jni_CallLongMethodV,
3519 jni_CallLongMethodA,
3520 jni_CallFloatMethod,
3521 jni_CallFloatMethodV,
3522 jni_CallFloatMethodA,
3523 jni_CallDoubleMethod,
3524 jni_CallDoubleMethodV,
3525 jni_CallDoubleMethodA,
3526 jni_CallVoidMethod,
3527 jni_CallVoidMethodV,
3528 jni_CallVoidMethodA,
3529
3530 jni_CallNonvirtualObjectMethod,
3531 jni_CallNonvirtualObjectMethodV,
3532 jni_CallNonvirtualObjectMethodA,
3533 jni_CallNonvirtualBooleanMethod,
3534 jni_CallNonvirtualBooleanMethodV,
3535 jni_CallNonvirtualBooleanMethodA,
3536 jni_CallNonvirtualByteMethod,
3537 jni_CallNonvirtualByteMethodV,
3538 jni_CallNonvirtualByteMethodA,
3539 jni_CallNonvirtualCharMethod,
3540 jni_CallNonvirtualCharMethodV,
3541 jni_CallNonvirtualCharMethodA,
3542 jni_CallNonvirtualShortMethod,
3543 jni_CallNonvirtualShortMethodV,
3544 jni_CallNonvirtualShortMethodA,
3545 jni_CallNonvirtualIntMethod,
3546 jni_CallNonvirtualIntMethodV,
3547 jni_CallNonvirtualIntMethodA,
3548 jni_CallNonvirtualLongMethod,
3549 jni_CallNonvirtualLongMethodV,
3550 jni_CallNonvirtualLongMethodA,
3551 jni_CallNonvirtualFloatMethod,
3552 jni_CallNonvirtualFloatMethodV,
3553 jni_CallNonvirtualFloatMethodA,
3554 jni_CallNonvirtualDoubleMethod,
3555 jni_CallNonvirtualDoubleMethodV,
3556 jni_CallNonvirtualDoubleMethodA,
3557 jni_CallNonvirtualVoidMethod,
3558 jni_CallNonvirtualVoidMethodV,
3559 jni_CallNonvirtualVoidMethodA,
3560
3561 jni_GetFieldID,
3562
3563 jni_GetObjectField,
3564 jni_GetBooleanField,
3565 jni_GetByteField,
3566 jni_GetCharField,
3567 jni_GetShortField,
3568 jni_GetIntField,
3569 jni_GetLongField,
3570 jni_GetFloatField,
3571 jni_GetDoubleField,
3572
3573 jni_SetObjectField,
3574 jni_SetBooleanField,
3575 jni_SetByteField,
3576 jni_SetCharField,
3577 jni_SetShortField,
3578 jni_SetIntField,
3579 jni_SetLongField,
3580 jni_SetFloatField,
3581 jni_SetDoubleField,
3582
3583 jni_GetStaticMethodID,
3584
3585 jni_CallStaticObjectMethod,
3586 jni_CallStaticObjectMethodV,
3587 jni_CallStaticObjectMethodA,
3588 jni_CallStaticBooleanMethod,
3589 jni_CallStaticBooleanMethodV,
3590 jni_CallStaticBooleanMethodA,
3591 jni_CallStaticByteMethod,
3592 jni_CallStaticByteMethodV,
3593 jni_CallStaticByteMethodA,
3594 jni_CallStaticCharMethod,
3595 jni_CallStaticCharMethodV,
3596 jni_CallStaticCharMethodA,
3597 jni_CallStaticShortMethod,
3598 jni_CallStaticShortMethodV,
3599 jni_CallStaticShortMethodA,
3600 jni_CallStaticIntMethod,
3601 jni_CallStaticIntMethodV,
3602 jni_CallStaticIntMethodA,
3603 jni_CallStaticLongMethod,
3604 jni_CallStaticLongMethodV,
3605 jni_CallStaticLongMethodA,
3606 jni_CallStaticFloatMethod,
3607 jni_CallStaticFloatMethodV,
3608 jni_CallStaticFloatMethodA,
3609 jni_CallStaticDoubleMethod,
3610 jni_CallStaticDoubleMethodV,
3611 jni_CallStaticDoubleMethodA,
3612 jni_CallStaticVoidMethod,
3613 jni_CallStaticVoidMethodV,
3614 jni_CallStaticVoidMethodA,
3615
3616 jni_GetStaticFieldID,
3617
3618 jni_GetStaticObjectField,
3619 jni_GetStaticBooleanField,
3620 jni_GetStaticByteField,
3621 jni_GetStaticCharField,
3622 jni_GetStaticShortField,
3623 jni_GetStaticIntField,
3624 jni_GetStaticLongField,
3625 jni_GetStaticFloatField,
3626 jni_GetStaticDoubleField,
3627
3628 jni_SetStaticObjectField,
3629 jni_SetStaticBooleanField,
3630 jni_SetStaticByteField,
3631 jni_SetStaticCharField,
3632 jni_SetStaticShortField,
3633 jni_SetStaticIntField,
3634 jni_SetStaticLongField,
3635 jni_SetStaticFloatField,
3636 jni_SetStaticDoubleField,
3637
3638 jni_NewString,
3639 jni_GetStringLength,
3640 jni_GetStringChars,
3641 jni_ReleaseStringChars,
3642
3643 jni_NewStringUTF,
3644 jni_GetStringUTFLength,
3645 jni_GetStringUTFChars,
3646 jni_ReleaseStringUTFChars,
3647
3648 jni_GetArrayLength,
3649
3650 jni_NewObjectArray,
3651 jni_GetObjectArrayElement,
3652 jni_SetObjectArrayElement,
3653
3654 jni_NewBooleanArray,
3655 jni_NewByteArray,
3656 jni_NewCharArray,
3657 jni_NewShortArray,
3658 jni_NewIntArray,
3659 jni_NewLongArray,
3660 jni_NewFloatArray,
3661 jni_NewDoubleArray,
3662
3663 jni_GetBooleanArrayElements,
3664 jni_GetByteArrayElements,
3665 jni_GetCharArrayElements,
3666 jni_GetShortArrayElements,
3667 jni_GetIntArrayElements,
3668 jni_GetLongArrayElements,
3669 jni_GetFloatArrayElements,
3670 jni_GetDoubleArrayElements,
3671
3672 jni_ReleaseBooleanArrayElements,
3673 jni_ReleaseByteArrayElements,
3674 jni_ReleaseCharArrayElements,
3675 jni_ReleaseShortArrayElements,
3676 jni_ReleaseIntArrayElements,
3677 jni_ReleaseLongArrayElements,
3678 jni_ReleaseFloatArrayElements,
3679 jni_ReleaseDoubleArrayElements,
3680
3681 jni_GetBooleanArrayRegion,
3682 jni_GetByteArrayRegion,
3683 jni_GetCharArrayRegion,
3684 jni_GetShortArrayRegion,
3685 jni_GetIntArrayRegion,
3686 jni_GetLongArrayRegion,
3687 jni_GetFloatArrayRegion,
3688 jni_GetDoubleArrayRegion,
3689
3690 jni_SetBooleanArrayRegion,
3691 jni_SetByteArrayRegion,
3692 jni_SetCharArrayRegion,
3693 jni_SetShortArrayRegion,
3694 jni_SetIntArrayRegion,
3695 jni_SetLongArrayRegion,
3696 jni_SetFloatArrayRegion,
3697 jni_SetDoubleArrayRegion,
3698
3699 jni_RegisterNatives,
3700 jni_UnregisterNatives,
3701
3702 jni_MonitorEnter,
3703 jni_MonitorExit,
3704
3705 jni_GetJavaVM,
3706
3707 jni_GetStringRegion,
3708 jni_GetStringUTFRegion,
3709
3710 jni_GetPrimitiveArrayCritical,
3711 jni_ReleasePrimitiveArrayCritical,
3712
3713 jni_GetStringCritical,
3714 jni_ReleaseStringCritical,
3715
3716 jni_NewWeakGlobalRef,
3717 jni_DeleteWeakGlobalRef,
3718
3719 jni_ExceptionCheck,
3720
3721 jni_NewDirectByteBuffer,
3722 jni_GetDirectBufferAddress,
3723 jni_GetDirectBufferCapacity,
3724
3725 // New 1_6 features
3726
3727 jni_GetObjectRefType
3728 };
3729
3730
3731 // For jvmti use to modify jni function table.
3732 // Java threads in native contiues to run until it is transitioned
3733 // to VM at safepoint. Before the transition or before it is blocked
3734 // for safepoint it may access jni function table. VM could crash if
3735 // any java thread access the jni function table in the middle of memcpy.
3736 // To avoid this each function pointers are copied automically.
3737 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3738 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3739 intptr_t *a = (intptr_t *) jni_functions();
3740 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3741 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3742 Atomic::store_ptr(*b++, a++);
3743 }
3744 }
3745
3746 void quicken_jni_functions() {
3747 // Replace Get<Primitive>Field with fast versions
3748 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3749 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3750 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3751 // windows x86 currently needs SEH wrapper and the gain of the fast
3752 // versions currently isn't certain for server vm on uniprocessor.
3753 && os::is_MP()
3754 #endif
3755 ) {
3756 address func;
3757 func = JNI_FastGetField::generate_fast_get_boolean_field();
3758 if (func != (address)-1) {
3759 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3760 }
3761 func = JNI_FastGetField::generate_fast_get_byte_field();
3762 if (func != (address)-1) {
3763 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3764 }
3765 func = JNI_FastGetField::generate_fast_get_char_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_short_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_int_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_long_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3780 }
3781 func = JNI_FastGetField::generate_fast_get_float_field();
3782 if (func != (address)-1) {
3783 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3784 }
3785 func = JNI_FastGetField::generate_fast_get_double_field();
3786 if (func != (address)-1) {
3787 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3788 }
3789 }
3790 }
3791
3792 // Returns the function structure
3793 struct JNINativeInterface_* jni_functions() {
3794 #if INCLUDE_JNI_CHECK
3795 if (CheckJNICalls) return jni_functions_check();
3796 #endif // INCLUDE_JNI_CHECK
3797 return &jni_NativeInterface;
3798 }
3799
3800 // Returns the function structure
3801 struct JNINativeInterface_* jni_functions_nocheck() {
3802 return &jni_NativeInterface;
3803 }
3804
3805
3806 // Invocation API
3807
3808
3809 // Forward declaration
3810 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3811
3812 // Global invocation API vars
3813 volatile jint vm_created = 0;
3814 // Indicate whether it is safe to recreate VM
3815 volatile jint safe_to_recreate_vm = 1;
3816 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3817
3818
3819 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3820 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3821
3822 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3823 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3824
3825 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3826 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3827 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3828 jint ret = JNI_ERR;
3829 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3830
3831 if (Threads::is_supported_jni_version(args->version)) {
3832 ret = JNI_OK;
3833 }
3834 // 1.1 style no longer supported in hotspot.
3835 // According the JNI spec, we should update args->version on return.
3836 // We also use the structure to communicate with launcher about default
3837 // stack size.
3838 if (args->version == JNI_VERSION_1_1) {
3839 args->version = JNI_VERSION_1_2;
3840 // javaStackSize is int in arguments structure
3841 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3842 args->javaStackSize = (jint)(ThreadStackSize * K);
3843 }
3844 return ret;
3845 }
3846
3847 #ifndef PRODUCT
3848
3849 #include "gc/shared/collectedHeap.hpp"
3850 #include "gc/shared/gcTimer.hpp"
3851 #if INCLUDE_ALL_GCS
3852 #include "gc/g1/heapRegionRemSet.hpp"
3853 #endif
3854 #include "compiler/directivesParser.hpp"
3855 #include "memory/guardedMemory.hpp"
3856 #include "utilities/json.hpp"
3857 #include "utilities/ostream.hpp"
3858 #include "utilities/quickSort.hpp"
3859 #if INCLUDE_VM_STRUCTS
3860 #include "runtime/vmStructs.hpp"
3861 #endif
3862
3863 #define run_unit_test(unit_test_function_call) \
3864 tty->print_cr("Running test: " #unit_test_function_call); \
3865 unit_test_function_call
3866
3867 // Forward declaration
3868 void TestNmethodBucket_test();
3869 void test_semaphore();
3870 void TestOS_test();
3871 void TestReservedSpace_test();
3872 void TestReserveMemorySpecial_test();
3873 void TestVirtualSpace_test();
3874 void TestMetaspaceAux_test();
3875 void TestMetachunk_test();
3876 void TestVirtualSpaceNode_test();
3877 void TestNewSize_test();
3878 void TestOldSize_test();
3879 void TestKlass_test();
3880 void TestBitMap_test();
3881 void TestAsUtf8();
3882 void Test_linked_list();
3883 void TestResourcehash_test();
3884 void TestChunkedList_test();
3885 void Test_log_length();
3886 #if INCLUDE_ALL_GCS
3887 void TestOldFreeSpaceCalculation_test();
3888 void TestG1BiasedArray_test();
3889 void TestBufferingOopClosure_test();
3890 void TestCodeCacheRemSet_test();
3891 void FreeRegionList_test();
3892 void IHOP_test();
3893 void test_memset_with_concurrent_readers();
3894 void TestPredictions_test();
3895 void WorkerDataArray_test();
3896 #endif
3897
3898 void execute_internal_vm_tests() {
3899 if (ExecuteInternalVMTests) {
3900 tty->print_cr("Running internal VM tests");
3901 run_unit_test(TestNmethodBucket_test());
3902 run_unit_test(test_semaphore());
3903 run_unit_test(TestOS_test());
3904 run_unit_test(TestReservedSpace_test());
3905 run_unit_test(TestReserveMemorySpecial_test());
3906 run_unit_test(TestVirtualSpace_test());
3907 run_unit_test(TestMetaspaceAux_test());
3908 run_unit_test(TestMetachunk_test());
3909 run_unit_test(TestVirtualSpaceNode_test());
3910 run_unit_test(GlobalDefinitions::test_globals());
3911 run_unit_test(GCTimerAllTest::all());
3912 run_unit_test(arrayOopDesc::test_max_array_length());
3913 run_unit_test(CollectedHeap::test_is_in());
3914 run_unit_test(QuickSort::test_quick_sort());
3915 run_unit_test(GuardedMemory::test_guarded_memory());
3916 run_unit_test(AltHashing::test_alt_hash());
3917 run_unit_test(test_loggc_filename());
3918 run_unit_test(TestNewSize_test());
3919 run_unit_test(TestOldSize_test());
3920 run_unit_test(TestKlass_test());
3921 run_unit_test(TestBitMap_test());
3922 run_unit_test(TestAsUtf8());
3923 run_unit_test(TestResourcehash_test());
3924 run_unit_test(ObjectMonitor::sanity_checks());
3925 run_unit_test(Test_linked_list());
3926 run_unit_test(TestChunkedList_test());
3927 run_unit_test(JSONTest::test());
3928 run_unit_test(Test_log_length());
3929 run_unit_test(DirectivesParser::test());
3930 #if INCLUDE_VM_STRUCTS
3931 run_unit_test(VMStructs::test());
3932 #endif
3933 #if INCLUDE_ALL_GCS
3934 run_unit_test(TestOldFreeSpaceCalculation_test());
3935 run_unit_test(TestG1BiasedArray_test());
3936 run_unit_test(TestBufferingOopClosure_test());
3937 run_unit_test(TestCodeCacheRemSet_test());
3938 if (UseG1GC) {
3939 run_unit_test(FreeRegionList_test());
3940 run_unit_test(IHOP_test());
3941 }
3942 run_unit_test(test_memset_with_concurrent_readers());
3943 run_unit_test(TestPredictions_test());
3944 run_unit_test(WorkerDataArray_test());
3945 #endif
3946 tty->print_cr("All internal VM tests passed");
3947 }
3948 }
3949
3950 #undef run_unit_test
3951
3952 #endif
3953
3954 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3955 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3956
3957 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3958 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3959
3960 jint result = JNI_ERR;
3961 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3962
3963 // We're about to use Atomic::xchg for synchronization. Some Zero
3964 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3965 // but __sync_lock_test_and_set is not guaranteed to do what we want
3966 // on all architectures. So we check it works before relying on it.
3967 #if defined(ZERO) && defined(ASSERT)
3968 {
3969 jint a = 0xcafebabe;
3970 jint b = Atomic::xchg(0xdeadbeef, &a);
3971 void *c = &a;
3972 void *d = Atomic::xchg_ptr(&b, &c);
3973 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3974 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3975 }
3976 #endif // ZERO && ASSERT
3977
3978 // At the moment it's only possible to have one Java VM,
3979 // since some of the runtime state is in global variables.
3980
3981 // We cannot use our mutex locks here, since they only work on
3982 // Threads. We do an atomic compare and exchange to ensure only
3983 // one thread can call this method at a time
3984
3985 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3986 // the add/dec implementations are dependent on whether we are running
3987 // on a multiprocessor, and at this stage of initialization the os::is_MP
3988 // function used to determine this will always return false. Atomic::xchg
3989 // does not have this problem.
3990 if (Atomic::xchg(1, &vm_created) == 1) {
3991 return JNI_EEXIST; // already created, or create attempt in progress
3992 }
3993 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3994 return JNI_ERR; // someone tried and failed and retry not allowed.
3995 }
3996
3997 assert(vm_created == 1, "vm_created is true during the creation");
3998
3999 /**
4000 * Certain errors during initialization are recoverable and do not
4001 * prevent this method from being called again at a later time
4002 * (perhaps with different arguments). However, at a certain
4003 * point during initialization if an error occurs we cannot allow
4004 * this function to be called again (or it will crash). In those
4005 * situations, the 'canTryAgain' flag is set to false, which atomically
4006 * sets safe_to_recreate_vm to 1, such that any new call to
4007 * JNI_CreateJavaVM will immediately fail using the above logic.
4008 */
4009 bool can_try_again = true;
4010
4011 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
4012 if (result == JNI_OK) {
4013 JavaThread *thread = JavaThread::current();
4014 assert(!thread->has_pending_exception(), "should have returned not OK");
4015 /* thread is thread_in_vm here */
4016 *vm = (JavaVM *)(&main_vm);
4017 *(JNIEnv**)penv = thread->jni_environment();
4018
4019 #if INCLUDE_JVMCI
4020 if (EnableJVMCI) {
4021 if (UseJVMCICompiler) {
4022 // JVMCI is initialized on a CompilerThread
4023 if (BootstrapJVMCI) {
4024 JavaThread* THREAD = thread;
4025 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
4026 compiler->bootstrap();
4027 }
4028 }
4029 }
4030 #endif
4031
4032 // Tracks the time application was running before GC
4033 RuntimeService::record_application_start();
4034
4035 // Notify JVMTI
4036 if (JvmtiExport::should_post_thread_life()) {
4037 JvmtiExport::post_thread_start(thread);
4038 }
4039
4040 EventThreadStart event;
4041 if (event.should_commit()) {
4042 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4043 event.commit();
4044 }
4045
4046 #ifndef PRODUCT
4047 // Check if we should compile all classes on bootclasspath
4048 if (CompileTheWorld) ClassLoader::compile_the_world();
4049 if (ReplayCompiles) ciReplay::replay(thread);
4050
4051 // Some platforms (like Win*) need a wrapper around these test
4052 // functions in order to properly handle error conditions.
4053 test_error_handler();
4054 execute_internal_vm_tests();
4055 #endif
4056
4057 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4058 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4059 } else {
4060 // If create_vm exits because of a pending exception, exit with that
4061 // exception. In the future when we figure out how to reclaim memory,
4062 // we may be able to exit with JNI_ERR and allow the calling application
4063 // to continue.
4064 if (Universe::is_fully_initialized()) {
4065 // otherwise no pending exception possible - VM will already have aborted
4066 JavaThread* THREAD = JavaThread::current();
4067 if (HAS_PENDING_EXCEPTION) {
4068 HandleMark hm;
4069 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4070 }
4071 }
4072
4073 if (can_try_again) {
4074 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4075 safe_to_recreate_vm = 1;
4076 }
4077
4078 // Creation failed. We must reset vm_created
4079 *vm = 0;
4080 *(JNIEnv**)penv = 0;
4081 // reset vm_created last to avoid race condition. Use OrderAccess to
4082 // control both compiler and architectural-based reordering.
4083 OrderAccess::release_store(&vm_created, 0);
4084 }
4085
4086 // Flush stdout and stderr before exit.
4087 fflush(stdout);
4088 fflush(stderr);
4089
4090 return result;
4091
4092 }
4093
4094 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4095 jint result = 0;
4096 // On Windows, let CreateJavaVM run with SEH protection
4097 #ifdef _WIN32
4098 __try {
4099 #endif
4100 result = JNI_CreateJavaVM_inner(vm, penv, args);
4101 #ifdef _WIN32
4102 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4103 // Nothing to do.
4104 }
4105 #endif
4106 return result;
4107 }
4108
4109 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4110 // See bug 4367188, the wrapper can sometimes cause VM crashes
4111 // JNIWrapper("GetCreatedJavaVMs");
4112
4113 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4114
4115 if (vm_created) {
4116 if (numVMs != NULL) *numVMs = 1;
4117 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4118 } else {
4119 if (numVMs != NULL) *numVMs = 0;
4120 }
4121 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4122 return JNI_OK;
4123 }
4124
4125 extern "C" {
4126
4127 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4128 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4129
4130 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4131 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4132 jint res = JNI_ERR;
4133 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4134
4135 if (!vm_created) {
4136 res = JNI_ERR;
4137 return res;
4138 }
4139
4140 JNIWrapper("DestroyJavaVM");
4141 JNIEnv *env;
4142 JavaVMAttachArgs destroyargs;
4143 destroyargs.version = CurrentVersion;
4144 destroyargs.name = (char *)"DestroyJavaVM";
4145 destroyargs.group = NULL;
4146 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4147 if (res != JNI_OK) {
4148 return res;
4149 }
4150
4151 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4152 JavaThread* thread = JavaThread::current();
4153 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4154 if (Threads::destroy_vm()) {
4155 // Should not change thread state, VM is gone
4156 vm_created = false;
4157 res = JNI_OK;
4158 return res;
4159 } else {
4160 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4161 res = JNI_ERR;
4162 return res;
4163 }
4164 }
4165
4166
4167 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4168 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4169
4170 // Check below commented out from JDK1.2fcs as well
4171 /*
4172 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4173 return JNI_EVERSION;
4174 }
4175 */
4176
4177 Thread* t = ThreadLocalStorage::get_thread_slow();
4178 if (t != NULL) {
4179 // If the thread has been attached this operation is a no-op
4180 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4181 return JNI_OK;
4182 }
4183
4184 // Create a thread and mark it as attaching so it will be skipped by the
4185 // ThreadsListEnumerator - see CR 6404306
4186 JavaThread* thread = new JavaThread(true);
4187
4188 // Set correct safepoint info. The thread is going to call into Java when
4189 // initializing the Java level thread object. Hence, the correct state must
4190 // be set in order for the Safepoint code to deal with it correctly.
4191 thread->set_thread_state(_thread_in_vm);
4192 // Must do this before initialize_thread_local_storage
4193 thread->record_stack_base_and_size();
4194
4195 thread->initialize_thread_local_storage();
4196
4197 if (!os::create_attached_thread(thread)) {
4198 delete thread;
4199 return JNI_ERR;
4200 }
4201 // Enable stack overflow checks
4202 thread->create_stack_guard_pages();
4203
4204 thread->initialize_tlab();
4205
4206 thread->cache_global_variables();
4207
4208 // Crucial that we do not have a safepoint check for this thread, since it has
4209 // not been added to the Thread list yet.
4210 { Threads_lock->lock_without_safepoint_check();
4211 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4212 // avoid this thread trying to do a GC before it is added to the thread-list
4213 thread->set_active_handles(JNIHandleBlock::allocate_block());
4214 Threads::add(thread, daemon);
4215 Threads_lock->unlock();
4216 }
4217 // Create thread group and name info from attach arguments
4218 oop group = NULL;
4219 char* thread_name = NULL;
4220 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4221 group = JNIHandles::resolve(args->group);
4222 thread_name = args->name; // may be NULL
4223 }
4224 if (group == NULL) group = Universe::main_thread_group();
4225
4226 // Create Java level thread object and attach it to this thread
4227 bool attach_failed = false;
4228 {
4229 EXCEPTION_MARK;
4230 HandleMark hm(THREAD);
4231 Handle thread_group(THREAD, group);
4232 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4233 if (HAS_PENDING_EXCEPTION) {
4234 CLEAR_PENDING_EXCEPTION;
4235 // cleanup outside the handle mark.
4236 attach_failed = true;
4237 }
4238 }
4239
4240 if (attach_failed) {
4241 // Added missing cleanup
4242 thread->cleanup_failed_attach_current_thread();
4243 return JNI_ERR;
4244 }
4245
4246 // mark the thread as no longer attaching
4247 // this uses a fence to push the change through so we don't have
4248 // to regrab the threads_lock
4249 thread->set_done_attaching_via_jni();
4250
4251 // Set java thread status.
4252 java_lang_Thread::set_thread_status(thread->threadObj(),
4253 java_lang_Thread::RUNNABLE);
4254
4255 // Notify the debugger
4256 if (JvmtiExport::should_post_thread_life()) {
4257 JvmtiExport::post_thread_start(thread);
4258 }
4259
4260 EventThreadStart event;
4261 if (event.should_commit()) {
4262 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4263 event.commit();
4264 }
4265
4266 *(JNIEnv**)penv = thread->jni_environment();
4267
4268 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4269 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4270 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4271 // needed.
4272
4273 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4274
4275 // Perform any platform dependent FPU setup
4276 os::setup_fpu();
4277
4278 return JNI_OK;
4279 }
4280
4281
4282 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4283 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4284 if (!vm_created) {
4285 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4286 return JNI_ERR;
4287 }
4288
4289 JNIWrapper("AttachCurrentThread");
4290 jint ret = attach_current_thread(vm, penv, _args, false);
4291 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4292 return ret;
4293 }
4294
4295
4296 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4297 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4298 VM_Exit::block_if_vm_exited();
4299
4300 JNIWrapper("DetachCurrentThread");
4301
4302 // If the thread has been deattacted the operations is a no-op
4303 if (ThreadLocalStorage::thread() == NULL) {
4304 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4305 return JNI_OK;
4306 }
4307
4308 JavaThread* thread = JavaThread::current();
4309 if (thread->has_last_Java_frame()) {
4310 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4311 // Can't detach a thread that's running java, that can't work.
4312 return JNI_ERR;
4313 }
4314
4315 // Safepoint support. Have to do call-back to safepoint code, if in the
4316 // middel of a safepoint operation
4317 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4318
4319 // XXX: Note that JavaThread::exit() call below removes the guards on the
4320 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4321 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4322 // of the guards is visible in jni_AttachCurrentThread above,
4323 // the removal of the guards is buried below in JavaThread::exit()
4324 // here. The abstraction should be more symmetrically either exposed
4325 // or hidden (e.g. it could probably be hidden in the same
4326 // (platform-dependent) methods where we do alternate stack
4327 // maintenance work?)
4328 thread->exit(false, JavaThread::jni_detach);
4329 delete thread;
4330
4331 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4332 return JNI_OK;
4333 }
4334
4335 DT_RETURN_MARK_DECL(GetEnv, jint
4336 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4337
4338 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4339 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4340 jint ret = JNI_ERR;
4341 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4342
4343 if (!vm_created) {
4344 *penv = NULL;
4345 ret = JNI_EDETACHED;
4346 return ret;
4347 }
4348
4349 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4350 return ret;
4351 }
4352
4353 #ifndef JVMPI_VERSION_1
4354 // need these in order to be polite about older agents
4355 #define JVMPI_VERSION_1 ((jint)0x10000001)
4356 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4357 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4358 #endif // !JVMPI_VERSION_1
4359
4360 Thread* thread = ThreadLocalStorage::thread();
4361 if (thread != NULL && thread->is_Java_thread()) {
4362 if (Threads::is_supported_jni_version_including_1_1(version)) {
4363 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4364 ret = JNI_OK;
4365 return ret;
4366
4367 } else if (version == JVMPI_VERSION_1 ||
4368 version == JVMPI_VERSION_1_1 ||
4369 version == JVMPI_VERSION_1_2) {
4370 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4371 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4372 ret = JNI_EVERSION;
4373 return ret;
4374 } else if (JvmtiExport::is_jvmdi_version(version)) {
4375 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4376 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4377 ret = JNI_EVERSION;
4378 return ret;
4379 } else {
4380 *penv = NULL;
4381 ret = JNI_EVERSION;
4382 return ret;
4383 }
4384 } else {
4385 *penv = NULL;
4386 ret = JNI_EDETACHED;
4387 return ret;
4388 }
4389 }
4390
4391
4392 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4393 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4394 if (!vm_created) {
4395 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4396 return JNI_ERR;
4397 }
4398
4399 JNIWrapper("AttachCurrentThreadAsDaemon");
4400 jint ret = attach_current_thread(vm, penv, _args, true);
4401 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4402 return ret;
4403 }
4404
4405
4406 } // End extern "C"
4407
4408 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4409 NULL,
4410 NULL,
4411 NULL,
4412
4413 jni_DestroyJavaVM,
4414 jni_AttachCurrentThread,
4415 jni_DetachCurrentThread,
4416 jni_GetEnv,
4417 jni_AttachCurrentThreadAsDaemon
4418 };