1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "utilities/macros.hpp"
36 #if INCLUDE_ALL_GCS
37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
38 #endif // INCLUDE_ALL_GCS
39 #include "memory/allocation.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/gcLocker.inline.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceOop.hpp"
46 #include "oops/markOop.hpp"
47 #include "oops/method.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/objArrayOop.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayKlass.hpp"
53 #include "oops/typeArrayOop.hpp"
54 #include "prims/jni.h"
55 #include "prims/jniCheck.hpp"
56 #include "prims/jniExport.hpp"
57 #include "prims/jniFastGetField.hpp"
58 #include "prims/jvm.h"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "runtime/atomic.inline.hpp"
63 #include "runtime/compilationPolicy.hpp"
64 #include "runtime/fieldDescriptor.hpp"
65 #include "runtime/fprofiler.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/interfaceSupport.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/orderAccess.inline.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/signature.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/vm_operations.hpp"
77 #include "services/runtimeService.hpp"
78 #include "trace/tracing.hpp"
79 #include "utilities/defaultStream.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/histogram.hpp"
83 #ifdef TARGET_OS_FAMILY_linux
84 # include "os_linux.inline.hpp"
85 #endif
86 #ifdef TARGET_OS_FAMILY_solaris
87 # include "os_solaris.inline.hpp"
88 #endif
89 #ifdef TARGET_OS_FAMILY_windows
90 # include "os_windows.inline.hpp"
91 #endif
92 #ifdef TARGET_OS_FAMILY_bsd
93 # include "os_bsd.inline.hpp"
94 #endif
95
96 static jint CurrentVersion = JNI_VERSION_1_8;
97
98
99 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
100 // '-return' probe regardless of the return path is taken out of the function.
101 // Methods that have multiple return paths use this to avoid having to
102 // instrument each return path. Methods that use CHECK or THROW must use this
103 // since those macros can cause an immedate uninstrumented return.
104 //
105 // In order to get the return value, a reference to the variable containing
106 // the return value must be passed to the contructor of the object, and
107 // the return value must be set before return (since the mark object has
108 // a reference to it).
109 //
110 // Example:
111 // DT_RETURN_MARK_DECL(SomeFunc, int);
112 // JNI_ENTRY(int, SomeFunc, ...)
113 // int return_value = 0;
114 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
115 // foo(CHECK_0)
116 // return_value = 5;
117 // return return_value;
118 // JNI_END
119 #define DT_RETURN_MARK_DECL(name, type, probe) \
120 DTRACE_ONLY( \
121 class DTraceReturnProbeMark_##name { \
122 public: \
123 const type& _ret_ref; \
124 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
125 ~DTraceReturnProbeMark_##name() { \
126 probe; \
127 } \
128 } \
129 )
130 // Void functions are simpler since there's no return value
131 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
132 DTRACE_ONLY( \
133 class DTraceReturnProbeMark_##name { \
134 public: \
135 ~DTraceReturnProbeMark_##name() { \
136 probe; \
137 } \
138 } \
139 )
140
141 // Place these macros in the function to mark the return. Non-void
142 // functions need the type and address of the return value.
143 #define DT_RETURN_MARK(name, type, ref) \
144 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
145 #define DT_VOID_RETURN_MARK(name) \
146 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
147
148
149 // Use these to select distinct code for floating-point vs. non-floating point
150 // situations. Used from within common macros where we need slightly
151 // different behavior for Float/Double
152 #define FP_SELECT_Boolean(intcode, fpcode) intcode
153 #define FP_SELECT_Byte(intcode, fpcode) intcode
154 #define FP_SELECT_Char(intcode, fpcode) intcode
155 #define FP_SELECT_Short(intcode, fpcode) intcode
156 #define FP_SELECT_Object(intcode, fpcode) intcode
157 #define FP_SELECT_Int(intcode, fpcode) intcode
158 #define FP_SELECT_Long(intcode, fpcode) intcode
159 #define FP_SELECT_Float(intcode, fpcode) fpcode
160 #define FP_SELECT_Double(intcode, fpcode) fpcode
161 #define FP_SELECT(TypeName, intcode, fpcode) \
162 FP_SELECT_##TypeName(intcode, fpcode)
163
164 #define COMMA ,
165
166 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
167 // (dtrace doesn't do FP yet)
168 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
171 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
172 FP_SELECT(TypeName, \
173 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
174
175
176 // out-of-line helpers for class jfieldIDWorkaround:
177
178 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
179 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
180 uintptr_t as_uint = (uintptr_t) id;
181 intptr_t offset = raw_instance_offset(id);
182 if (is_checked_jfieldID(id)) {
183 if (!klass_hash_ok(k, id)) {
184 return false;
185 }
186 }
187 return InstanceKlass::cast(k)->contains_field_offset(offset);
188 } else {
189 JNIid* result = (JNIid*) id;
190 #ifdef ASSERT
191 return result != NULL && result->is_static_field_id();
192 #else
193 return result != NULL;
194 #endif
195 }
196 }
197
198
199 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
200 if (offset <= small_offset_mask) {
201 Klass* field_klass = k;
202 Klass* super_klass = field_klass->super();
203 // With compressed oops the most super class with nonstatic fields would
204 // be the owner of fields embedded in the header.
205 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
206 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
207 field_klass = super_klass; // super contains the field also
208 super_klass = field_klass->super();
209 }
210 debug_only(No_Safepoint_Verifier nosafepoint;)
211 uintptr_t klass_hash = field_klass->identity_hash();
212 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
213 } else {
214 #if 0
215 #ifndef PRODUCT
216 {
217 ResourceMark rm;
218 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
219 }
220 #endif
221 #endif
222 return 0;
223 }
224 }
225
226 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
227 uintptr_t as_uint = (uintptr_t) id;
228 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
229 do {
230 debug_only(No_Safepoint_Verifier nosafepoint;)
231 // Could use a non-blocking query for identity_hash here...
232 if ((k->identity_hash() & klass_mask) == klass_hash)
233 return true;
234 k = k->super();
235 } while (k != NULL);
236 return false;
237 }
238
239 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
240 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
241 uintptr_t as_uint = (uintptr_t) id;
242 intptr_t offset = raw_instance_offset(id);
243 if (VerifyJNIFields) {
244 if (is_checked_jfieldID(id)) {
245 guarantee(klass_hash_ok(k, id),
246 "Bug in native code: jfieldID class must match object");
247 } else {
248 #if 0
249 #ifndef PRODUCT
250 if (Verbose) {
251 ResourceMark rm;
252 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
253 }
254 #endif
255 #endif
256 }
257 }
258 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
259 "Bug in native code: jfieldID offset must address interior of object");
260 }
261
262 // Pick a reasonable higher bound for local capacity requested
263 // for EnsureLocalCapacity and PushLocalFrame. We don't want it too
264 // high because a test (or very unusual application) may try to allocate
265 // that many handles and run out of swap space. An implementation is
266 // permitted to allocate more handles than the ensured capacity, so this
267 // value is set high enough to prevent compatibility problems.
268 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K;
269
270
271 // Wrapper to trace JNI functions
272
273 #ifdef ASSERT
274 Histogram* JNIHistogram;
275 static volatile jint JNIHistogram_lock = 0;
276
277 class JNITraceWrapper : public StackObj {
278 public:
279 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
280 if (TraceJNICalls) {
281 va_list ap;
282 va_start(ap, format);
283 tty->print("JNI ");
284 tty->vprint_cr(format, ap);
285 va_end(ap);
286 }
287 }
288 };
289
290 class JNIHistogramElement : public HistogramElement {
291 public:
292 JNIHistogramElement(const char* name);
293 };
294
295 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
296 _name = elementName;
297 uintx count = 0;
298
299 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
300 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
301 count +=1;
302 if ( (WarnOnStalledSpinLock > 0)
303 && (count % WarnOnStalledSpinLock == 0)) {
304 warning("JNIHistogram_lock seems to be stalled");
305 }
306 }
307 }
308
309
310 if(JNIHistogram == NULL)
311 JNIHistogram = new Histogram("JNI Call Counts",100);
312
313 JNIHistogram->add_element(this);
314 Atomic::dec(&JNIHistogram_lock);
315 }
316
317 #define JNICountWrapper(arg) \
318 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
319 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
320 if (e != NULL) e->increment_count()
321 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
322 #else
323 #define JNIWrapper(arg)
324 #endif
325
326
327 // Implementation of JNI entries
328
329 DT_RETURN_MARK_DECL(DefineClass, jclass
330 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
331
332 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
333 const jbyte *buf, jsize bufLen))
334 JNIWrapper("DefineClass");
335
336 HOTSPOT_JNI_DEFINECLASS_ENTRY(
337 env, (char*) name, loaderRef, (char*) buf, bufLen);
338
339 jclass cls = NULL;
340 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
341
342 TempNewSymbol class_name = NULL;
343 // Since exceptions can be thrown, class initialization can take place
344 // if name is NULL no check for class name in .class stream has to be made.
345 if (name != NULL) {
346 const int str_len = (int)strlen(name);
347 if (str_len > Symbol::max_length()) {
348 // It's impossible to create this class; the name cannot fit
349 // into the constant pool.
350 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
351 }
352 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
353 }
354 ResourceMark rm(THREAD);
355 ClassFileStream st((u1*) buf, bufLen, NULL);
356 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
357
358 if (UsePerfData && !class_loader.is_null()) {
359 // check whether the current caller thread holds the lock or not.
360 // If not, increment the corresponding counter
361 if (ObjectSynchronizer::
362 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
363 ObjectSynchronizer::owner_self) {
364 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
365 }
366 }
367 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
368 Handle(), &st, true,
369 CHECK_NULL);
370
371 if (TraceClassResolution && k != NULL) {
372 trace_class_resolution(k);
373 }
374
375 cls = (jclass)JNIHandles::make_local(
376 env, k->java_mirror());
377 return cls;
378 JNI_END
379
380
381
382 static bool first_time_FindClass = true;
383
384 DT_RETURN_MARK_DECL(FindClass, jclass
385 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
386
387 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
388 JNIWrapper("FindClass");
389
390 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
391
392 jclass result = NULL;
393 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
394
395 // Remember if we are the first invocation of jni_FindClass
396 bool first_time = first_time_FindClass;
397 first_time_FindClass = false;
398
399 // Sanity check the name: it cannot be null or larger than the maximum size
400 // name we can fit in the constant pool.
401 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
402 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
403 }
404
405 //%note jni_3
406 Handle loader;
407 Handle protection_domain;
408 // Find calling class
409 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
410 if (k.not_null()) {
411 loader = Handle(THREAD, k->class_loader());
412 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
413 // in the correct class context.
414 if (loader.is_null() &&
415 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
416 JavaValue result(T_OBJECT);
417 JavaCalls::call_static(&result, k,
418 vmSymbols::getFromClass_name(),
419 vmSymbols::void_class_signature(),
420 thread);
421 if (HAS_PENDING_EXCEPTION) {
422 Handle ex(thread, thread->pending_exception());
423 CLEAR_PENDING_EXCEPTION;
424 THROW_HANDLE_0(ex);
425 }
426 oop mirror = (oop) result.get_jobject();
427 loader = Handle(THREAD,
428 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
429 protection_domain = Handle(THREAD,
430 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
431 }
432 } else {
433 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
434 loader = Handle(THREAD, SystemDictionary::java_system_loader());
435 }
436
437 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
438 result = find_class_from_class_loader(env, sym, true, loader,
439 protection_domain, true, thread);
440
441 if (TraceClassResolution && result != NULL) {
442 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
443 }
444
445 // If we were the first invocation of jni_FindClass, we enable compilation again
446 // rather than just allowing invocation counter to overflow and decay.
447 // Controlled by flag DelayCompilationDuringStartup.
448 if (first_time && !CompileTheWorld)
449 CompilationPolicy::completed_vm_startup();
450
451 return result;
452 JNI_END
453
454 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
455 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
456
457 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
458 JNIWrapper("FromReflectedMethod");
459
460 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
461
462 jmethodID ret = NULL;
463 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
464
465 // method is a handle to a java.lang.reflect.Method object
466 oop reflected = JNIHandles::resolve_non_null(method);
467 oop mirror = NULL;
468 int slot = 0;
469
470 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
471 mirror = java_lang_reflect_Constructor::clazz(reflected);
472 slot = java_lang_reflect_Constructor::slot(reflected);
473 } else {
474 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
475 mirror = java_lang_reflect_Method::clazz(reflected);
476 slot = java_lang_reflect_Method::slot(reflected);
477 }
478 Klass* k = java_lang_Class::as_Klass(mirror);
479
480 KlassHandle k1(THREAD, k);
481 // Make sure class is initialized before handing id's out to methods
482 k1()->initialize(CHECK_NULL);
483 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
484 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
485 return ret;
486 JNI_END
487
488 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
489 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
490
491 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
492 JNIWrapper("FromReflectedField");
493
494 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
495
496 jfieldID ret = NULL;
497 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
498
499 // field is a handle to a java.lang.reflect.Field object
500 oop reflected = JNIHandles::resolve_non_null(field);
501 oop mirror = java_lang_reflect_Field::clazz(reflected);
502 Klass* k = java_lang_Class::as_Klass(mirror);
503 int slot = java_lang_reflect_Field::slot(reflected);
504 int modifiers = java_lang_reflect_Field::modifiers(reflected);
505
506 KlassHandle k1(THREAD, k);
507 // Make sure class is initialized before handing id's out to fields
508 k1()->initialize(CHECK_NULL);
509
510 // First check if this is a static field
511 if (modifiers & JVM_ACC_STATIC) {
512 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
513 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
514 assert(id != NULL, "corrupt Field object");
515 debug_only(id->set_is_static_field_id();)
516 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
517 ret = jfieldIDWorkaround::to_static_jfieldID(id);
518 return ret;
519 }
520
521 // The slot is the index of the field description in the field-array
522 // The jfieldID is the offset of the field within the object
523 // It may also have hash bits for k, if VerifyJNIFields is turned on.
524 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
525 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
526 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
527 return ret;
528 JNI_END
529
530
531 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
532 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
533
534 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
535 JNIWrapper("ToReflectedMethod");
536
537 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
538
539 jobject ret = NULL;
540 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
541
542 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
543 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
544 oop reflection_method;
545 if (m->is_initializer()) {
546 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
547 } else {
548 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
549 }
550 ret = JNIHandles::make_local(env, reflection_method);
551 return ret;
552 JNI_END
553
554 DT_RETURN_MARK_DECL(GetSuperclass, jclass
555 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
556
557 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
558 JNIWrapper("GetSuperclass");
559
560 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
561
562 jclass obj = NULL;
563 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
564
565 oop mirror = JNIHandles::resolve_non_null(sub);
566 // primitive classes return NULL
567 if (java_lang_Class::is_primitive(mirror)) return NULL;
568
569 // Rules of Class.getSuperClass as implemented by KLass::java_super:
570 // arrays return Object
571 // interfaces return NULL
572 // proper classes return Klass::super()
573 Klass* k = java_lang_Class::as_Klass(mirror);
574 if (k->is_interface()) return NULL;
575
576 // return mirror for superclass
577 Klass* super = k->java_super();
578 // super2 is the value computed by the compiler's getSuperClass intrinsic:
579 debug_only(Klass* super2 = ( k->oop_is_array()
580 ? SystemDictionary::Object_klass()
581 : k->super() ) );
582 assert(super == super2,
583 "java_super computation depends on interface, array, other super");
584 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
585 return obj;
586 JNI_END
587
588 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
589 JNIWrapper("IsSubclassOf");
590
591 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
592
593 oop sub_mirror = JNIHandles::resolve_non_null(sub);
594 oop super_mirror = JNIHandles::resolve_non_null(super);
595 if (java_lang_Class::is_primitive(sub_mirror) ||
596 java_lang_Class::is_primitive(super_mirror)) {
597 jboolean ret = (sub_mirror == super_mirror);
598
599 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
600 return ret;
601 }
602 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
603 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
604 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
605 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
606 JNI_TRUE : JNI_FALSE;
607
608 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
609 return ret;
610 JNI_END
611
612
613 DT_RETURN_MARK_DECL(Throw, jint
614 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
615
616 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
617 JNIWrapper("Throw");
618
619 HOTSPOT_JNI_THROW_ENTRY(env, obj);
620
621 jint ret = JNI_OK;
622 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
623
624 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
625 ShouldNotReachHere();
626 JNI_END
627
628
629 DT_RETURN_MARK_DECL(ThrowNew, jint
630 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
631
632 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
633 JNIWrapper("ThrowNew");
634
635 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
636
637 jint ret = JNI_OK;
638 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
639
640 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
641 Symbol* name = k->name();
642 Handle class_loader (THREAD, k->class_loader());
643 Handle protection_domain (THREAD, k->protection_domain());
644 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
645 ShouldNotReachHere();
646 JNI_END
647
648
649 // JNI functions only transform a pending async exception to a synchronous
650 // exception in ExceptionOccurred and ExceptionCheck calls, since
651 // delivering an async exception in other places won't change the native
652 // code's control flow and would be harmful when native code further calls
653 // JNI functions with a pending exception. Async exception is also checked
654 // during the call, so ExceptionOccurred/ExceptionCheck won't return
655 // false but deliver the async exception at the very end during
656 // state transition.
657
658 static void jni_check_async_exceptions(JavaThread *thread) {
659 assert(thread == Thread::current(), "must be itself");
660 thread->check_and_handle_async_exceptions();
661 }
662
663 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
664 JNIWrapper("ExceptionOccurred");
665
666 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
667
668 jni_check_async_exceptions(thread);
669 oop exception = thread->pending_exception();
670 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
671
672 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
673 return ret;
674 JNI_END
675
676
677 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
678 JNIWrapper("ExceptionDescribe");
679
680 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
681
682 if (thread->has_pending_exception()) {
683 Handle ex(thread, thread->pending_exception());
684 thread->clear_pending_exception();
685 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
686 // Don't print anything if we are being killed.
687 } else {
688 jio_fprintf(defaultStream::error_stream(), "Exception ");
689 if (thread != NULL && thread->threadObj() != NULL) {
690 ResourceMark rm(THREAD);
691 jio_fprintf(defaultStream::error_stream(),
692 "in thread \"%s\" ", thread->get_thread_name());
693 }
694 if (ex->is_a(SystemDictionary::Throwable_klass())) {
695 JavaValue result(T_VOID);
696 JavaCalls::call_virtual(&result,
697 ex,
698 KlassHandle(THREAD,
699 SystemDictionary::Throwable_klass()),
700 vmSymbols::printStackTrace_name(),
701 vmSymbols::void_method_signature(),
702 THREAD);
703 // If an exception is thrown in the call it gets thrown away. Not much
704 // we can do with it. The native code that calls this, does not check
705 // for the exception - hence, it might still be in the thread when DestroyVM gets
706 // called, potentially causing a few asserts to trigger - since no pending exception
707 // is expected.
708 CLEAR_PENDING_EXCEPTION;
709 } else {
710 ResourceMark rm(THREAD);
711 jio_fprintf(defaultStream::error_stream(),
712 ". Uncaught exception of type %s.",
713 ex->klass()->external_name());
714 }
715 }
716 }
717
718 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
719 JNI_END
720
721
722 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
723 JNIWrapper("ExceptionClear");
724
725 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
726
727 // The jni code might be using this API to clear java thrown exception.
728 // So just mark jvmti thread exception state as exception caught.
729 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
730 if (state != NULL && state->is_exception_detected()) {
731 state->set_exception_caught();
732 }
733 thread->clear_pending_exception();
734
735 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
736 JNI_END
737
738
739 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
740 JNIWrapper("FatalError");
741
742 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
743
744 tty->print_cr("FATAL ERROR in native method: %s", msg);
745 thread->print_stack();
746 os::abort(); // Dump core and abort
747 JNI_END
748
749
750 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
751 JNIWrapper("PushLocalFrame");
752
753 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
754
755 //%note jni_11
756 if (capacity < 0 || capacity > MAX_REASONABLE_LOCAL_CAPACITY) {
757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
758 return JNI_ERR;
759 }
760 JNIHandleBlock* old_handles = thread->active_handles();
761 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
762 assert(new_handles != NULL, "should not be NULL");
763 new_handles->set_pop_frame_link(old_handles);
764 thread->set_active_handles(new_handles);
765 jint ret = JNI_OK;
766 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
767 return ret;
768 JNI_END
769
770
771 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
772 JNIWrapper("PopLocalFrame");
773
774 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
775
776 //%note jni_11
777 Handle result_handle(thread, JNIHandles::resolve(result));
778 JNIHandleBlock* old_handles = thread->active_handles();
779 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
780 if (new_handles != NULL) {
781 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
782 // This way code will still work if PopLocalFrame is called without a corresponding
783 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
784 // the release_block call will release the blocks.
785 thread->set_active_handles(new_handles);
786 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
787 JNIHandleBlock::release_block(old_handles, thread); // may block
788 result = JNIHandles::make_local(thread, result_handle());
789 }
790 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
791 return result;
792 JNI_END
793
794
795 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
796 JNIWrapper("NewGlobalRef");
797
798 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
799
800 Handle ref_handle(thread, JNIHandles::resolve(ref));
801 jobject ret = JNIHandles::make_global(ref_handle);
802
803 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
804 return ret;
805 JNI_END
806
807 // Must be JNI_ENTRY (with HandleMark)
808 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
809 JNIWrapper("DeleteGlobalRef");
810
811 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
812
813 JNIHandles::destroy_global(ref);
814
815 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
816 JNI_END
817
818 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
819 JNIWrapper("DeleteLocalRef");
820
821 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
822
823 JNIHandles::destroy_local(obj);
824
825 HOTSPOT_JNI_DELETELOCALREF_RETURN();
826 JNI_END
827
828 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
829 JNIWrapper("IsSameObject");
830
831 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
832
833 oop a = JNIHandles::resolve(r1);
834 oop b = JNIHandles::resolve(r2);
835 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
836
837 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
838 return ret;
839 JNI_END
840
841
842 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
843 JNIWrapper("NewLocalRef");
844
845 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
846
847 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
848
849 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
850 return ret;
851 JNI_END
852
853 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
854 JNIWrapper("EnsureLocalCapacity");
855
856 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
857
858 jint ret;
859 if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) {
860 ret = JNI_OK;
861 } else {
862 ret = JNI_ERR;
863 }
864
865 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
866 return ret;
867 JNI_END
868
869 // Return the Handle Type
870 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
871 JNIWrapper("GetObjectRefType");
872
873 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
874
875 jobjectRefType ret;
876 if (JNIHandles::is_local_handle(thread, obj) ||
877 JNIHandles::is_frame_handle(thread, obj))
878 ret = JNILocalRefType;
879 else if (JNIHandles::is_global_handle(obj))
880 ret = JNIGlobalRefType;
881 else if (JNIHandles::is_weak_global_handle(obj))
882 ret = JNIWeakGlobalRefType;
883 else
884 ret = JNIInvalidRefType;
885
886 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
887 return ret;
888 JNI_END
889
890
891 class JNI_ArgumentPusher : public SignatureIterator {
892 protected:
893 JavaCallArguments* _arguments;
894
895 virtual void get_bool () = 0;
896 virtual void get_char () = 0;
897 virtual void get_short () = 0;
898 virtual void get_byte () = 0;
899 virtual void get_int () = 0;
900 virtual void get_long () = 0;
901 virtual void get_float () = 0;
902 virtual void get_double () = 0;
903 virtual void get_object () = 0;
904
905 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
906 this->_return_type = T_ILLEGAL;
907 _arguments = NULL;
908 }
909
910 public:
911 virtual void iterate( uint64_t fingerprint ) = 0;
912
913 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
914
915 inline void do_bool() { if (!is_return_type()) get_bool(); }
916 inline void do_char() { if (!is_return_type()) get_char(); }
917 inline void do_short() { if (!is_return_type()) get_short(); }
918 inline void do_byte() { if (!is_return_type()) get_byte(); }
919 inline void do_int() { if (!is_return_type()) get_int(); }
920 inline void do_long() { if (!is_return_type()) get_long(); }
921 inline void do_float() { if (!is_return_type()) get_float(); }
922 inline void do_double() { if (!is_return_type()) get_double(); }
923 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
924 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
925 inline void do_void() { }
926
927 JavaCallArguments* arguments() { return _arguments; }
928 void push_receiver(Handle h) { _arguments->push_oop(h); }
929 };
930
931
932 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
933 protected:
934 va_list _ap;
935
936 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
937 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
938 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
939 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
940 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
941
942 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
943
944 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
945 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
946 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
947 inline void get_object() { jobject l = va_arg(_ap, jobject);
948 _arguments->push_oop(Handle((oop *)l, false)); }
949
950 inline void set_ap(va_list rap) {
951 #ifdef va_copy
952 va_copy(_ap, rap);
953 #elif defined (__va_copy)
954 __va_copy(_ap, rap);
955 #else
956 _ap = rap;
957 #endif
958 }
959
960 public:
961 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
962 : JNI_ArgumentPusher(signature) {
963 set_ap(rap);
964 }
965 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
966 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
967 set_ap(rap);
968 }
969
970 // Optimized path if we have the bitvector form of signature
971 void iterate( uint64_t fingerprint ) {
972 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments
973 else {
974 _return_type = (BasicType)((fingerprint >> static_feature_size) &
975 result_feature_mask);
976
977 assert(fingerprint, "Fingerprint should not be 0");
978 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
979 while ( 1 ) {
980 switch ( fingerprint & parameter_feature_mask ) {
981 case bool_parm:
982 case char_parm:
983 case short_parm:
984 case byte_parm:
985 case int_parm:
986 get_int();
987 break;
988 case obj_parm:
989 get_object();
990 break;
991 case long_parm:
992 get_long();
993 break;
994 case float_parm:
995 get_float();
996 break;
997 case double_parm:
998 get_double();
999 break;
1000 case done_parm:
1001 return;
1002 break;
1003 default:
1004 ShouldNotReachHere();
1005 break;
1006 }
1007 fingerprint >>= parameter_feature_size;
1008 }
1009 }
1010 }
1011 };
1012
1013
1014 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1015 protected:
1016 const jvalue *_ap;
1017
1018 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1019 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1020 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1021 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1022 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1023
1024 inline void get_long() { _arguments->push_long((_ap++)->j); }
1025 inline void get_float() { _arguments->push_float((_ap++)->f); }
1026 inline void get_double() { _arguments->push_double((_ap++)->d);}
1027 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1028
1029 inline void set_ap(const jvalue *rap) { _ap = rap; }
1030
1031 public:
1032 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1033 : JNI_ArgumentPusher(signature) {
1034 set_ap(rap);
1035 }
1036 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1037 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1038 set_ap(rap);
1039 }
1040
1041 // Optimized path if we have the bitvector form of signature
1042 void iterate( uint64_t fingerprint ) {
1043 if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments
1044 else {
1045 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1046 result_feature_mask);
1047 assert(fingerprint, "Fingerprint should not be 0");
1048 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1049 while ( 1 ) {
1050 switch ( fingerprint & parameter_feature_mask ) {
1051 case bool_parm:
1052 get_bool();
1053 break;
1054 case char_parm:
1055 get_char();
1056 break;
1057 case short_parm:
1058 get_short();
1059 break;
1060 case byte_parm:
1061 get_byte();
1062 break;
1063 case int_parm:
1064 get_int();
1065 break;
1066 case obj_parm:
1067 get_object();
1068 break;
1069 case long_parm:
1070 get_long();
1071 break;
1072 case float_parm:
1073 get_float();
1074 break;
1075 case double_parm:
1076 get_double();
1077 break;
1078 case done_parm:
1079 return;
1080 break;
1081 default:
1082 ShouldNotReachHere();
1083 break;
1084 }
1085 fingerprint >>= parameter_feature_size;
1086 }
1087 }
1088 }
1089 };
1090
1091
1092 enum JNICallType {
1093 JNI_STATIC,
1094 JNI_VIRTUAL,
1095 JNI_NONVIRTUAL
1096 };
1097
1098
1099
1100 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1101 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1102
1103 // Create object to hold arguments for the JavaCall, and associate it with
1104 // the jni parser
1105 ResourceMark rm(THREAD);
1106 int number_of_parameters = method->size_of_parameters();
1107 JavaCallArguments java_args(number_of_parameters);
1108 args->set_java_argument_object(&java_args);
1109
1110 assert(method->is_static(), "method should be static");
1111
1112 // Fill out JavaCallArguments object
1113 args->iterate( Fingerprinter(method).fingerprint() );
1114 // Initialize result type
1115 result->set_type(args->get_ret_type());
1116
1117 // Invoke the method. Result is returned as oop.
1118 JavaCalls::call(result, method, &java_args, CHECK);
1119
1120 // Convert result
1121 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1122 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1123 }
1124 }
1125
1126
1127 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1128 oop recv = JNIHandles::resolve(receiver);
1129 if (recv == NULL) {
1130 THROW(vmSymbols::java_lang_NullPointerException());
1131 }
1132 Handle h_recv(THREAD, recv);
1133
1134 int number_of_parameters;
1135 Method* selected_method;
1136 {
1137 Method* m = Method::resolve_jmethod_id(method_id);
1138 number_of_parameters = m->size_of_parameters();
1139 Klass* holder = m->method_holder();
1140 if (!(holder)->is_interface()) {
1141 // non-interface call -- for that little speed boost, don't handlize
1142 debug_only(No_Safepoint_Verifier nosafepoint;)
1143 if (call_type == JNI_VIRTUAL) {
1144 // jni_GetMethodID makes sure class is linked and initialized
1145 // so m should have a valid vtable index.
1146 assert(!m->has_itable_index(), "");
1147 int vtbl_index = m->vtable_index();
1148 if (vtbl_index != Method::nonvirtual_vtable_index) {
1149 Klass* k = h_recv->klass();
1150 // k might be an arrayKlassOop but all vtables start at
1151 // the same place. The cast is to avoid virtual call and assertion.
1152 InstanceKlass *ik = (InstanceKlass*)k;
1153 selected_method = ik->method_at_vtable(vtbl_index);
1154 } else {
1155 // final method
1156 selected_method = m;
1157 }
1158 } else {
1159 // JNI_NONVIRTUAL call
1160 selected_method = m;
1161 }
1162 } else {
1163 // interface call
1164 KlassHandle h_holder(THREAD, holder);
1165
1166 if (call_type == JNI_VIRTUAL) {
1167 int itbl_index = m->itable_index();
1168 Klass* k = h_recv->klass();
1169 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1170 } else {
1171 selected_method = m;
1172 }
1173 }
1174 }
1175
1176 methodHandle method(THREAD, selected_method);
1177
1178 // Create object to hold arguments for the JavaCall, and associate it with
1179 // the jni parser
1180 ResourceMark rm(THREAD);
1181 JavaCallArguments java_args(number_of_parameters);
1182 args->set_java_argument_object(&java_args);
1183
1184 // handle arguments
1185 assert(!method->is_static(), "method should not be static");
1186 args->push_receiver(h_recv); // Push jobject handle
1187
1188 // Fill out JavaCallArguments object
1189 args->iterate( Fingerprinter(method).fingerprint() );
1190 // Initialize result type
1191 result->set_type(args->get_ret_type());
1192
1193 // Invoke the method. Result is returned as oop.
1194 JavaCalls::call(result, method, &java_args, CHECK);
1195
1196 // Convert result
1197 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1198 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1199 }
1200 }
1201
1202
1203 static instanceOop alloc_object(jclass clazz, TRAPS) {
1204 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1205 if (k == NULL) {
1206 ResourceMark rm(THREAD);
1207 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1208 }
1209 k()->check_valid_for_instantiation(false, CHECK_NULL);
1210 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1211 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1212 return ih;
1213 }
1214
1215 DT_RETURN_MARK_DECL(AllocObject, jobject
1216 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1217
1218 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1219 JNIWrapper("AllocObject");
1220
1221 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1222
1223 jobject ret = NULL;
1224 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1225
1226 instanceOop i = alloc_object(clazz, CHECK_NULL);
1227 ret = JNIHandles::make_local(env, i);
1228 return ret;
1229 JNI_END
1230
1231 DT_RETURN_MARK_DECL(NewObjectA, jobject
1232 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1233
1234 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1235 JNIWrapper("NewObjectA");
1236
1237 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1238
1239 jobject obj = NULL;
1240 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1241
1242 instanceOop i = alloc_object(clazz, CHECK_NULL);
1243 obj = JNIHandles::make_local(env, i);
1244 JavaValue jvalue(T_VOID);
1245 JNI_ArgumentPusherArray ap(methodID, args);
1246 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1247 return obj;
1248 JNI_END
1249
1250
1251 DT_RETURN_MARK_DECL(NewObjectV, jobject
1252 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1253
1254 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1255 JNIWrapper("NewObjectV");
1256
1257 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1258
1259 jobject obj = NULL;
1260 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1261
1262 instanceOop i = alloc_object(clazz, CHECK_NULL);
1263 obj = JNIHandles::make_local(env, i);
1264 JavaValue jvalue(T_VOID);
1265 JNI_ArgumentPusherVaArg ap(methodID, args);
1266 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1267 return obj;
1268 JNI_END
1269
1270
1271 DT_RETURN_MARK_DECL(NewObject, jobject
1272 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1273
1274 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1275 JNIWrapper("NewObject");
1276
1277 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1278
1279 jobject obj = NULL;
1280 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1281
1282 instanceOop i = alloc_object(clazz, CHECK_NULL);
1283 obj = JNIHandles::make_local(env, i);
1284 va_list args;
1285 va_start(args, methodID);
1286 JavaValue jvalue(T_VOID);
1287 JNI_ArgumentPusherVaArg ap(methodID, args);
1288 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1289 va_end(args);
1290 return obj;
1291 JNI_END
1292
1293
1294 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1295 JNIWrapper("GetObjectClass");
1296
1297 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1298
1299 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1300 jclass ret =
1301 (jclass) JNIHandles::make_local(env, k->java_mirror());
1302
1303 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1304 return ret;
1305 JNI_END
1306
1307 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1308 JNIWrapper("IsInstanceOf");
1309
1310 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1311
1312 jboolean ret = JNI_TRUE;
1313 if (obj != NULL) {
1314 ret = JNI_FALSE;
1315 Klass* k = java_lang_Class::as_Klass(
1316 JNIHandles::resolve_non_null(clazz));
1317 if (k != NULL) {
1318 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1319 }
1320 }
1321
1322 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1323 return ret;
1324 JNI_END
1325
1326
1327 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1328 const char *sig, bool is_static, TRAPS) {
1329 // %%%% This code should probably just call into a method in the LinkResolver
1330 //
1331 // The class should have been loaded (we have an instance of the class
1332 // passed in) so the method and signature should already be in the symbol
1333 // table. If they're not there, the method doesn't exist.
1334 const char *name_to_probe = (name_str == NULL)
1335 ? vmSymbols::object_initializer_name()->as_C_string()
1336 : name_str;
1337 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1338 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1339
1340 if (name == NULL || signature == NULL) {
1341 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1342 }
1343
1344 // Throw a NoSuchMethodError exception if we have an instance of a
1345 // primitive java.lang.Class
1346 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1347 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1348 }
1349
1350 KlassHandle klass(THREAD,
1351 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1352
1353 // Make sure class is linked and initialized before handing id's out to
1354 // Method*s.
1355 klass()->initialize(CHECK_NULL);
1356
1357 Method* m;
1358 if (name == vmSymbols::object_initializer_name() ||
1359 name == vmSymbols::class_initializer_name()) {
1360 // Never search superclasses for constructors
1361 if (klass->oop_is_instance()) {
1362 m = InstanceKlass::cast(klass())->find_method(name, signature);
1363 } else {
1364 m = NULL;
1365 }
1366 } else {
1367 m = klass->lookup_method(name, signature);
1368 if (m == NULL && klass->oop_is_instance()) {
1369 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1370 }
1371 }
1372 if (m == NULL || (m->is_static() != is_static)) {
1373 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1374 }
1375 return m->jmethod_id();
1376 }
1377
1378
1379 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1380 const char *name, const char *sig))
1381 JNIWrapper("GetMethodID");
1382 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1383 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1384 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1385 return ret;
1386 JNI_END
1387
1388
1389 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1390 const char *name, const char *sig))
1391 JNIWrapper("GetStaticMethodID");
1392 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1393 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1394 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1395 return ret;
1396 JNI_END
1397
1398
1399
1400 //
1401 // Calling Methods
1402 //
1403
1404
1405 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1406 , EntryProbe, ReturnProbe) \
1407 \
1408 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1409 , ReturnProbe); \
1410 \
1411 JNI_ENTRY(ResultType, \
1412 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1413 JNIWrapper("Call" XSTR(Result) "Method"); \
1414 \
1415 EntryProbe; \
1416 ResultType ret = 0;\
1417 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1418 (const ResultType&)ret);\
1419 \
1420 va_list args; \
1421 va_start(args, methodID); \
1422 JavaValue jvalue(Tag); \
1423 JNI_ArgumentPusherVaArg ap(methodID, args); \
1424 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1425 va_end(args); \
1426 ret = jvalue.get_##ResultType(); \
1427 return ret;\
1428 JNI_END
1429
1430 // the runtime type of subword integral basic types is integer
1431 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1432 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1434 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1435 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1438 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1441 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1443
1444 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1445 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1447 DEFINE_CALLMETHOD(jint, Int, T_INT,
1448 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1450 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1451 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1452 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1453 // Float and double probes don't return value because dtrace doesn't currently support it
1454 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1455 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1456 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1457 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1458 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1459 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1460
1461 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1462 , EntryProbe, ReturnProbe) \
1463 \
1464 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1465 , ReturnProbe); \
1466 \
1467 JNI_ENTRY(ResultType, \
1468 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1469 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1470 \
1471 EntryProbe;\
1472 ResultType ret = 0;\
1473 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1474 (const ResultType&)ret);\
1475 \
1476 JavaValue jvalue(Tag); \
1477 JNI_ArgumentPusherVaArg ap(methodID, args); \
1478 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1479 ret = jvalue.get_##ResultType(); \
1480 return ret;\
1481 JNI_END
1482
1483 // the runtime type of subword integral basic types is integer
1484 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1485 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1487 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1488 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1491 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1494 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1496
1497 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1498 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1500 DEFINE_CALLMETHODV(jint, Int, T_INT,
1501 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1503 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1504 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1505 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1506 // Float and double probes don't return value because dtrace doesn't currently support it
1507 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1508 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1509 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1510 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1511 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1512 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1513
1514 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1515 , EntryProbe, ReturnProbe) \
1516 \
1517 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1518 , ReturnProbe); \
1519 \
1520 JNI_ENTRY(ResultType, \
1521 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1522 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1523 EntryProbe; \
1524 ResultType ret = 0;\
1525 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1526 (const ResultType&)ret);\
1527 \
1528 JavaValue jvalue(Tag); \
1529 JNI_ArgumentPusherArray ap(methodID, args); \
1530 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1531 ret = jvalue.get_##ResultType(); \
1532 return ret;\
1533 JNI_END
1534
1535 // the runtime type of subword integral basic types is integer
1536 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1537 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1539 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1540 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1543 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1546 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1548
1549 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1550 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1552 DEFINE_CALLMETHODA(jint, Int, T_INT,
1553 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1555 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1556 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1557 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1558 // Float and double probes don't return value because dtrace doesn't currently support it
1559 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1560 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1561 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1562 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1563 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1564 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1565
1566 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1567 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1568 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1569
1570
1571 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1572 JNIWrapper("CallVoidMethod");
1573 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1574 DT_VOID_RETURN_MARK(CallVoidMethod);
1575
1576 va_list args;
1577 va_start(args, methodID);
1578 JavaValue jvalue(T_VOID);
1579 JNI_ArgumentPusherVaArg ap(methodID, args);
1580 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1581 va_end(args);
1582 JNI_END
1583
1584
1585 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1586 JNIWrapper("CallVoidMethodV");
1587 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1588 DT_VOID_RETURN_MARK(CallVoidMethodV);
1589
1590 JavaValue jvalue(T_VOID);
1591 JNI_ArgumentPusherVaArg ap(methodID, args);
1592 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1593 JNI_END
1594
1595
1596 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1597 JNIWrapper("CallVoidMethodA");
1598 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1599 DT_VOID_RETURN_MARK(CallVoidMethodA);
1600
1601 JavaValue jvalue(T_VOID);
1602 JNI_ArgumentPusherArray ap(methodID, args);
1603 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1604 JNI_END
1605
1606
1607
1608 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1609 , EntryProbe, ReturnProbe) \
1610 \
1611 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1612 , ReturnProbe);\
1613 \
1614 JNI_ENTRY(ResultType, \
1615 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1616 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1617 \
1618 EntryProbe;\
1619 ResultType ret;\
1620 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1621 (const ResultType&)ret);\
1622 \
1623 va_list args; \
1624 va_start(args, methodID); \
1625 JavaValue jvalue(Tag); \
1626 JNI_ArgumentPusherVaArg ap(methodID, args); \
1627 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1628 va_end(args); \
1629 ret = jvalue.get_##ResultType(); \
1630 return ret;\
1631 JNI_END
1632
1633 // the runtime type of subword integral basic types is integer
1634 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1635 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1637 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1638 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1641 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1644 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1646
1647 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1648 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1650 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1651 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1653 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1654 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1655 // Float and double probes don't return value because dtrace doesn't currently support it
1656 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1657 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1658 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1659 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1660 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1661 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1662 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1663
1664 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1665 , EntryProbe, ReturnProbe) \
1666 \
1667 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1668 , ReturnProbe);\
1669 \
1670 JNI_ENTRY(ResultType, \
1671 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1672 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1673 \
1674 EntryProbe;\
1675 ResultType ret;\
1676 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1677 (const ResultType&)ret);\
1678 \
1679 JavaValue jvalue(Tag); \
1680 JNI_ArgumentPusherVaArg ap(methodID, args); \
1681 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1682 ret = jvalue.get_##ResultType(); \
1683 return ret;\
1684 JNI_END
1685
1686 // the runtime type of subword integral basic types is integer
1687 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1688 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1690 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1691 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1694 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1697 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1699
1700 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1701 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1703 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1704 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1706 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1707 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1708 // Float and double probes don't return value because dtrace doesn't currently support it
1709 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1710 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1711 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1712 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1713 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1714 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1715 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1716
1717 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1718 , EntryProbe, ReturnProbe) \
1719 \
1720 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1721 , ReturnProbe);\
1722 \
1723 JNI_ENTRY(ResultType, \
1724 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1725 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1726 \
1727 EntryProbe;\
1728 ResultType ret;\
1729 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1730 (const ResultType&)ret);\
1731 \
1732 JavaValue jvalue(Tag); \
1733 JNI_ArgumentPusherArray ap(methodID, args); \
1734 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1735 ret = jvalue.get_##ResultType(); \
1736 return ret;\
1737 JNI_END
1738
1739 // the runtime type of subword integral basic types is integer
1740 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1741 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1743 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1744 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1747 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1750 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1752
1753 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1754 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1756 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1757 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1759 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1760 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1761 // Float and double probes don't return value because dtrace doesn't currently support it
1762 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1763 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1764 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1765 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1766 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1767 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1768 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1769
1770 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1771 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1772 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1773 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1774 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1775 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1776
1777 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1778 JNIWrapper("CallNonvirtualVoidMethod");
1779
1780 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1781 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1782
1783 va_list args;
1784 va_start(args, methodID);
1785 JavaValue jvalue(T_VOID);
1786 JNI_ArgumentPusherVaArg ap(methodID, args);
1787 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1788 va_end(args);
1789 JNI_END
1790
1791
1792 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1793 JNIWrapper("CallNonvirtualVoidMethodV");
1794
1795 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1796 env, obj, cls, (uintptr_t) methodID);
1797 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1798
1799 JavaValue jvalue(T_VOID);
1800 JNI_ArgumentPusherVaArg ap(methodID, args);
1801 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1802 JNI_END
1803
1804
1805 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1806 JNIWrapper("CallNonvirtualVoidMethodA");
1807 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1808 env, obj, cls, (uintptr_t) methodID);
1809 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1810 JavaValue jvalue(T_VOID);
1811 JNI_ArgumentPusherArray ap(methodID, args);
1812 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1813 JNI_END
1814
1815
1816
1817 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1818 , EntryProbe, ResultProbe) \
1819 \
1820 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1821 , ResultProbe); \
1822 \
1823 JNI_ENTRY(ResultType, \
1824 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1825 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1826 \
1827 EntryProbe; \
1828 ResultType ret = 0;\
1829 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1830 (const ResultType&)ret);\
1831 \
1832 va_list args; \
1833 va_start(args, methodID); \
1834 JavaValue jvalue(Tag); \
1835 JNI_ArgumentPusherVaArg ap(methodID, args); \
1836 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1837 va_end(args); \
1838 ret = jvalue.get_##ResultType(); \
1839 return ret;\
1840 JNI_END
1841
1842 // the runtime type of subword integral basic types is integer
1843 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1844 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1846 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1847 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1850 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1853 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1855
1856 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1857 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1859 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1860 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1862 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1863 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1864 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1865 // Float and double probes don't return value because dtrace doesn't currently support it
1866 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1867 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1868 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1869 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1870 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1871 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1872
1873 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1874 , EntryProbe, ResultProbe) \
1875 \
1876 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1877 , ResultProbe); \
1878 \
1879 JNI_ENTRY(ResultType, \
1880 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1881 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1882 \
1883 EntryProbe; \
1884 ResultType ret = 0;\
1885 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1886 (const ResultType&)ret);\
1887 \
1888 JavaValue jvalue(Tag); \
1889 JNI_ArgumentPusherVaArg ap(methodID, args); \
1890 /* Make sure class is initialized before trying to invoke its method */ \
1891 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1892 k()->initialize(CHECK_0); \
1893 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1894 va_end(args); \
1895 ret = jvalue.get_##ResultType(); \
1896 return ret;\
1897 JNI_END
1898
1899 // the runtime type of subword integral basic types is integer
1900 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1901 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1903 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1904 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1907 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1910 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1912
1913 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1914 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1916 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1917 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1919 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1920 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1921 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1922 // Float and double probes don't return value because dtrace doesn't currently support it
1923 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1924 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1925 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1926 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1927 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1928 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1929
1930 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1931 , EntryProbe, ResultProbe) \
1932 \
1933 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1934 , ResultProbe); \
1935 \
1936 JNI_ENTRY(ResultType, \
1937 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1938 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1939 \
1940 EntryProbe; \
1941 ResultType ret = 0;\
1942 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1943 (const ResultType&)ret);\
1944 \
1945 JavaValue jvalue(Tag); \
1946 JNI_ArgumentPusherArray ap(methodID, args); \
1947 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1948 ret = jvalue.get_##ResultType(); \
1949 return ret;\
1950 JNI_END
1951
1952 // the runtime type of subword integral basic types is integer
1953 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1954 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1956 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1957 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1960 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1963 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1965
1966 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1967 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1969 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1970 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1972 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1973 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1974 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1975 // Float and double probes don't return value because dtrace doesn't currently support it
1976 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1977 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1978 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1979 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1980 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1981 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1982
1983 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1984 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1985 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1986 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1987 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1988 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1989
1990 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1991 JNIWrapper("CallStaticVoidMethod");
1992 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1993 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1994
1995 va_list args;
1996 va_start(args, methodID);
1997 JavaValue jvalue(T_VOID);
1998 JNI_ArgumentPusherVaArg ap(methodID, args);
1999 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2000 va_end(args);
2001 JNI_END
2002
2003
2004 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
2005 JNIWrapper("CallStaticVoidMethodV");
2006 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2007 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2008
2009 JavaValue jvalue(T_VOID);
2010 JNI_ArgumentPusherVaArg ap(methodID, args);
2011 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2012 JNI_END
2013
2014
2015 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2016 JNIWrapper("CallStaticVoidMethodA");
2017 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2018 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2019
2020 JavaValue jvalue(T_VOID);
2021 JNI_ArgumentPusherArray ap(methodID, args);
2022 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2023 JNI_END
2024
2025
2026 //
2027 // Accessing Fields
2028 //
2029
2030
2031 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2032 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2033
2034 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2035 const char *name, const char *sig))
2036 JNIWrapper("GetFieldID");
2037 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2038 jfieldID ret = 0;
2039 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2040
2041 // The class should have been loaded (we have an instance of the class
2042 // passed in) so the field and signature should already be in the symbol
2043 // table. If they're not there, the field doesn't exist.
2044 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2045 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2046 if (fieldname == NULL || signame == NULL) {
2047 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2048 }
2049 KlassHandle k(THREAD,
2050 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2051 // Make sure class is initialized before handing id's out to fields
2052 k()->initialize(CHECK_NULL);
2053
2054 fieldDescriptor fd;
2055 if (!k()->oop_is_instance() ||
2056 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2057 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2058 }
2059
2060 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2061 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2062 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2063 return ret;
2064 JNI_END
2065
2066
2067 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2068 JNIWrapper("GetObjectField");
2069 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2070 oop o = JNIHandles::resolve_non_null(obj);
2071 Klass* k = o->klass();
2072 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2073 // Keep JVMTI addition small and only check enabled flag here.
2074 // jni_GetField_probe() assumes that is okay to create handles.
2075 if (JvmtiExport::should_post_field_access()) {
2076 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2077 }
2078 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2079 #if INCLUDE_ALL_GCS
2080 // If G1 is enabled and we are accessing the value of the referent
2081 // field in a reference object then we need to register a non-null
2082 // referent with the SATB barrier.
2083 if (UseG1GC) {
2084 bool needs_barrier = false;
2085
2086 if (ret != NULL &&
2087 offset == java_lang_ref_Reference::referent_offset &&
2088 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2089 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2090 needs_barrier = true;
2091 }
2092
2093 if (needs_barrier) {
2094 oop referent = JNIHandles::resolve(ret);
2095 G1SATBCardTableModRefBS::enqueue(referent);
2096 }
2097 }
2098 #endif // INCLUDE_ALL_GCS
2099 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2100 return ret;
2101 JNI_END
2102
2103
2104
2105 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2106 , EntryProbe, ReturnProbe) \
2107 \
2108 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2109 , ReturnProbe); \
2110 \
2111 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2112 JNIWrapper("Get" XSTR(Result) "Field"); \
2113 \
2114 EntryProbe; \
2115 Return ret = 0;\
2116 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2117 \
2118 oop o = JNIHandles::resolve_non_null(obj); \
2119 Klass* k = o->klass(); \
2120 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2121 /* Keep JVMTI addition small and only check enabled flag here. */ \
2122 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2123 /* and creates a ResetNoHandleMark. */ \
2124 if (JvmtiExport::should_post_field_access()) { \
2125 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2126 } \
2127 ret = o->Fieldname##_field(offset); \
2128 return ret; \
2129 JNI_END
2130
2131 DEFINE_GETFIELD(jboolean, bool, Boolean
2132 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jbyte, byte, Byte
2135 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2137 DEFINE_GETFIELD(jchar, char, Char
2138 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2140 DEFINE_GETFIELD(jshort, short, Short
2141 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2142 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2143 DEFINE_GETFIELD(jint, int, Int
2144 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2145 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2146 DEFINE_GETFIELD(jlong, long, Long
2147 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2148 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2149 // Float and double probes don't return value because dtrace doesn't currently support it
2150 DEFINE_GETFIELD(jfloat, float, Float
2151 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2152 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2153 DEFINE_GETFIELD(jdouble, double, Double
2154 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2155 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2156
2157 address jni_GetBooleanField_addr() {
2158 return (address)jni_GetBooleanField;
2159 }
2160 address jni_GetByteField_addr() {
2161 return (address)jni_GetByteField;
2162 }
2163 address jni_GetCharField_addr() {
2164 return (address)jni_GetCharField;
2165 }
2166 address jni_GetShortField_addr() {
2167 return (address)jni_GetShortField;
2168 }
2169 address jni_GetIntField_addr() {
2170 return (address)jni_GetIntField;
2171 }
2172 address jni_GetLongField_addr() {
2173 return (address)jni_GetLongField;
2174 }
2175 address jni_GetFloatField_addr() {
2176 return (address)jni_GetFloatField;
2177 }
2178 address jni_GetDoubleField_addr() {
2179 return (address)jni_GetDoubleField;
2180 }
2181
2182 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2183 JNIWrapper("SetObjectField");
2184 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2185 oop o = JNIHandles::resolve_non_null(obj);
2186 Klass* k = o->klass();
2187 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2188 // Keep JVMTI addition small and only check enabled flag here.
2189 // jni_SetField_probe_nh() assumes that is not okay to create handles
2190 // and creates a ResetNoHandleMark.
2191 if (JvmtiExport::should_post_field_modification()) {
2192 jvalue field_value;
2193 field_value.l = value;
2194 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2195 }
2196 o->obj_field_put(offset, JNIHandles::resolve(value));
2197 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2198 JNI_END
2199
2200
2201 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2202 , EntryProbe, ReturnProbe) \
2203 \
2204 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2205 JNIWrapper("Set" XSTR(Result) "Field"); \
2206 \
2207 EntryProbe; \
2208 \
2209 oop o = JNIHandles::resolve_non_null(obj); \
2210 Klass* k = o->klass(); \
2211 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2212 /* Keep JVMTI addition small and only check enabled flag here. */ \
2213 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2214 /* and creates a ResetNoHandleMark. */ \
2215 if (JvmtiExport::should_post_field_modification()) { \
2216 jvalue field_value; \
2217 field_value.unionType = value; \
2218 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2219 } \
2220 o->Fieldname##_field_put(offset, value); \
2221 ReturnProbe; \
2222 JNI_END
2223
2224 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2225 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2226 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2227 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2228 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2230 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2231 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2232 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2233 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2234 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2235 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2236 DEFINE_SETFIELD(jint, int, Int, 'I', i
2237 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2238 HOTSPOT_JNI_SETINTFIELD_RETURN())
2239 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2240 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2241 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2242 // Float and double probes don't return value because dtrace doesn't currently support it
2243 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2244 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2245 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2246 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2247 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2248 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2249
2250 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2251 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2252
2253 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2254 JNIWrapper("ToReflectedField");
2255 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2256 jobject ret = NULL;
2257 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2258
2259 fieldDescriptor fd;
2260 bool found = false;
2261 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2262
2263 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2264
2265 if (isStatic) {
2266 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2267 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2268 assert(id->is_static_field_id(), "invalid static field id");
2269 found = id->find_local_field(&fd);
2270 } else {
2271 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2272 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2273 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2274 }
2275 assert(found, "bad fieldID passed into jni_ToReflectedField");
2276 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2277 ret = JNIHandles::make_local(env, reflected);
2278 return ret;
2279 JNI_END
2280
2281
2282 //
2283 // Accessing Static Fields
2284 //
2285 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2286 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2287
2288 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2289 const char *name, const char *sig))
2290 JNIWrapper("GetStaticFieldID");
2291 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2292 jfieldID ret = NULL;
2293 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2294
2295 // The class should have been loaded (we have an instance of the class
2296 // passed in) so the field and signature should already be in the symbol
2297 // table. If they're not there, the field doesn't exist.
2298 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2299 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2300 if (fieldname == NULL || signame == NULL) {
2301 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2302 }
2303 KlassHandle k(THREAD,
2304 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2305 // Make sure class is initialized before handing id's out to static fields
2306 k()->initialize(CHECK_NULL);
2307
2308 fieldDescriptor fd;
2309 if (!k()->oop_is_instance() ||
2310 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2311 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2312 }
2313
2314 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2315 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2316 debug_only(id->set_is_static_field_id();)
2317
2318 debug_only(id->verify(fd.field_holder()));
2319
2320 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2321 return ret;
2322 JNI_END
2323
2324
2325 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2326 JNIWrapper("GetStaticObjectField");
2327 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2328 #if INCLUDE_JNI_CHECK
2329 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2330 #endif // INCLUDE_JNI_CHECK
2331 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2332 assert(id->is_static_field_id(), "invalid static field id");
2333 // Keep JVMTI addition small and only check enabled flag here.
2334 // jni_GetField_probe() assumes that is okay to create handles.
2335 if (JvmtiExport::should_post_field_access()) {
2336 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2337 }
2338 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2339 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2340 return ret;
2341 JNI_END
2342
2343
2344 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2345 , EntryProbe, ReturnProbe) \
2346 \
2347 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2348 , ReturnProbe); \
2349 \
2350 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2351 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2352 EntryProbe; \
2353 Return ret = 0;\
2354 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2355 (const Return&)ret);\
2356 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2357 assert(id->is_static_field_id(), "invalid static field id"); \
2358 /* Keep JVMTI addition small and only check enabled flag here. */ \
2359 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2360 if (JvmtiExport::should_post_field_access()) { \
2361 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2362 } \
2363 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2364 return ret;\
2365 JNI_END
2366
2367 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2368 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2369 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2370 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2371 DEFINE_GETSTATICFIELD(jchar, char, Char
2372 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2373 DEFINE_GETSTATICFIELD(jshort, short, Short
2374 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2375 DEFINE_GETSTATICFIELD(jint, int, Int
2376 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2377 DEFINE_GETSTATICFIELD(jlong, long, Long
2378 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2379 // Float and double probes don't return value because dtrace doesn't currently support it
2380 DEFINE_GETSTATICFIELD(jfloat, float, Float
2381 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2382 DEFINE_GETSTATICFIELD(jdouble, double, Double
2383 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2384
2385 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2386 JNIWrapper("SetStaticObjectField");
2387 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2388 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2389 assert(id->is_static_field_id(), "invalid static field id");
2390 // Keep JVMTI addition small and only check enabled flag here.
2391 // jni_SetField_probe() assumes that is okay to create handles.
2392 if (JvmtiExport::should_post_field_modification()) {
2393 jvalue field_value;
2394 field_value.l = value;
2395 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2396 }
2397 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2398 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2399 JNI_END
2400
2401
2402
2403 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2404 , EntryProbe, ReturnProbe) \
2405 \
2406 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2407 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2408 EntryProbe; \
2409 \
2410 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2411 assert(id->is_static_field_id(), "invalid static field id"); \
2412 /* Keep JVMTI addition small and only check enabled flag here. */ \
2413 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2414 if (JvmtiExport::should_post_field_modification()) { \
2415 jvalue field_value; \
2416 field_value.unionType = value; \
2417 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2418 } \
2419 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2420 ReturnProbe;\
2421 JNI_END
2422
2423 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2424 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2425 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2426 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2427 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2428 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2429 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2430 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2431 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2432 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2433 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2434 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2435 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2436 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2437 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2438 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2439 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2440 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2441 // Float and double probes don't return value because dtrace doesn't currently support it
2442 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2443 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2444 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2445 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2446 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2447 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2448
2449 //
2450 // String Operations
2451 //
2452
2453 // Unicode Interface
2454
2455 DT_RETURN_MARK_DECL(NewString, jstring
2456 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2457
2458 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2459 JNIWrapper("NewString");
2460 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2461 jstring ret = NULL;
2462 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2463 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2464 ret = (jstring) JNIHandles::make_local(env, string);
2465 return ret;
2466 JNI_END
2467
2468
2469 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2470 JNIWrapper("GetStringLength");
2471 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2472 jsize ret = 0;
2473 oop s = JNIHandles::resolve_non_null(string);
2474 if (java_lang_String::value(s) != NULL) {
2475 ret = java_lang_String::length(s);
2476 }
2477 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2478 return ret;
2479 JNI_END
2480
2481
2482 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2483 JNIEnv *env, jstring string, jboolean *isCopy))
2484 JNIWrapper("GetStringChars");
2485 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2486 jchar* buf = NULL;
2487 oop s = JNIHandles::resolve_non_null(string);
2488 typeArrayOop s_value = java_lang_String::value(s);
2489 if (s_value != NULL) {
2490 int s_len = java_lang_String::length(s);
2491 int s_offset = java_lang_String::offset(s);
2492 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2493 /* JNI Specification states return NULL on OOM */
2494 if (buf != NULL) {
2495 if (s_len > 0) {
2496 memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2497 }
2498 buf[s_len] = 0;
2499 //%note jni_5
2500 if (isCopy != NULL) {
2501 *isCopy = JNI_TRUE;
2502 }
2503 }
2504 }
2505 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2506 return buf;
2507 JNI_END
2508
2509
2510 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2511 JNIWrapper("ReleaseStringChars");
2512 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2513 //%note jni_6
2514 if (chars != NULL) {
2515 // Since String objects are supposed to be immutable, don't copy any
2516 // new data back. A bad user will have to go after the char array.
2517 FreeHeap((void*) chars);
2518 }
2519 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2520 JNI_END
2521
2522
2523 // UTF Interface
2524
2525 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2526 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2527
2528 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2529 JNIWrapper("NewStringUTF");
2530 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2531 jstring ret;
2532 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2533
2534 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2535 ret = (jstring) JNIHandles::make_local(env, result);
2536 return ret;
2537 JNI_END
2538
2539
2540 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2541 JNIWrapper("GetStringUTFLength");
2542 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2543 jsize ret = 0;
2544 oop java_string = JNIHandles::resolve_non_null(string);
2545 if (java_lang_String::value(java_string) != NULL) {
2546 ret = java_lang_String::utf8_length(java_string);
2547 }
2548 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2549 return ret;
2550 JNI_END
2551
2552
2553 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2554 JNIWrapper("GetStringUTFChars");
2555 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2556 char* result = NULL;
2557 oop java_string = JNIHandles::resolve_non_null(string);
2558 if (java_lang_String::value(java_string) != NULL) {
2559 size_t length = java_lang_String::utf8_length(java_string);
2560 /* JNI Specification states return NULL on OOM */
2561 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2562 if (result != NULL) {
2563 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2564 if (isCopy != NULL) {
2565 *isCopy = JNI_TRUE;
2566 }
2567 }
2568 }
2569 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2570 return result;
2571 JNI_END
2572
2573
2574 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2575 JNIWrapper("ReleaseStringUTFChars");
2576 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2577 if (chars != NULL) {
2578 FreeHeap((char*) chars);
2579 }
2580 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2581 JNI_END
2582
2583
2584 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2585 JNIWrapper("GetArrayLength");
2586 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2587 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2588 assert(a->is_array(), "must be array");
2589 jsize ret = a->length();
2590 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2591 return ret;
2592 JNI_END
2593
2594
2595 //
2596 // Object Array Operations
2597 //
2598
2599 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2600 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2601
2602 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2603 JNIWrapper("NewObjectArray");
2604 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2605 jobjectArray ret = NULL;
2606 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2607 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2608 Klass* ako = ek()->array_klass(CHECK_NULL);
2609 KlassHandle ak = KlassHandle(THREAD, ako);
2610 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2611 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2612 oop initial_value = JNIHandles::resolve(initialElement);
2613 if (initial_value != NULL) { // array already initialized with NULL
2614 for (int index = 0; index < length; index++) {
2615 result->obj_at_put(index, initial_value);
2616 }
2617 }
2618 ret = (jobjectArray) JNIHandles::make_local(env, result);
2619 return ret;
2620 JNI_END
2621
2622 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2623 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2624
2625 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2626 JNIWrapper("GetObjectArrayElement");
2627 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2628 jobject ret = NULL;
2629 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2630 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2631 if (a->is_within_bounds(index)) {
2632 ret = JNIHandles::make_local(env, a->obj_at(index));
2633 return ret;
2634 } else {
2635 char buf[jintAsStringSize];
2636 sprintf(buf, "%d", index);
2637 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2638 }
2639 JNI_END
2640
2641 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2642 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2643
2644 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2645 JNIWrapper("SetObjectArrayElement");
2646 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2647 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2648
2649 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2650 oop v = JNIHandles::resolve(value);
2651 if (a->is_within_bounds(index)) {
2652 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2653 a->obj_at_put(index, v);
2654 } else {
2655 THROW(vmSymbols::java_lang_ArrayStoreException());
2656 }
2657 } else {
2658 char buf[jintAsStringSize];
2659 sprintf(buf, "%d", index);
2660 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2661 }
2662 JNI_END
2663
2664
2665
2666 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2667 ,EntryProbe,ReturnProbe) \
2668 \
2669 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2670 , ReturnProbe); \
2671 \
2672 JNI_ENTRY(Return, \
2673 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2674 JNIWrapper("New" XSTR(Result) "Array"); \
2675 EntryProbe; \
2676 Return ret = NULL;\
2677 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2678 \
2679 oop obj= oopFactory::Allocator(len, CHECK_0); \
2680 ret = (Return) JNIHandles::make_local(env, obj); \
2681 return ret;\
2682 JNI_END
2683
2684 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2685 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2686 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2687 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2688 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2689 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2690 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2691 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2692 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2693 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2694 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2695 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2696 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2697 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2698 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2699 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2700 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2701 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2702 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2703 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2704 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2705 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2706 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2707 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2708
2709 // Return an address which will fault if the caller writes to it.
2710
2711 static char* get_bad_address() {
2712 static char* bad_address = NULL;
2713 if (bad_address == NULL) {
2714 size_t size = os::vm_allocation_granularity();
2715 bad_address = os::reserve_memory(size);
2716 if (bad_address != NULL) {
2717 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2718 /*is_committed*/false);
2719 }
2720 }
2721 return bad_address;
2722 }
2723
2724
2725
2726 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2727 , EntryProbe, ReturnProbe) \
2728 \
2729 JNI_QUICK_ENTRY(ElementType*, \
2730 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2731 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2732 EntryProbe; \
2733 /* allocate an chunk of memory in c land */ \
2734 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2735 ElementType* result; \
2736 int len = a->length(); \
2737 if (len == 0) { \
2738 /* Empty array: legal but useless, can't return NULL. \
2739 * Return a pointer to something useless. \
2740 * Avoid asserts in typeArrayOop. */ \
2741 result = (ElementType*)get_bad_address(); \
2742 } else { \
2743 /* JNI Specification states return NULL on OOM */ \
2744 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2745 if (result != NULL) { \
2746 /* copy the array to the c chunk */ \
2747 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2748 if (isCopy) { \
2749 *isCopy = JNI_TRUE; \
2750 } \
2751 } \
2752 } \
2753 ReturnProbe; \
2754 return result; \
2755 JNI_END
2756
2757 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2758 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2761 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2764 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2767 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2769 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2770 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2771 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2772 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2773 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2774 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2775 // Float and double probes don't return value because dtrace doesn't currently support it
2776 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2777 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2778 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2779 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2780 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2781 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2782
2783
2784 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2785 , EntryProbe, ReturnProbe);\
2786 \
2787 JNI_QUICK_ENTRY(void, \
2788 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2789 ElementType *buf, jint mode)) \
2790 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2791 EntryProbe; \
2792 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2793 int len = a->length(); \
2794 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2795 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2796 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2797 } \
2798 if ((mode == 0) || (mode == JNI_ABORT)) { \
2799 FreeHeap(buf); \
2800 } \
2801 } \
2802 ReturnProbe; \
2803 JNI_END
2804
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2806 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2807 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2809 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2810 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2812 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2813 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2815 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2816 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2818 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2819 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2821 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2822 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2823 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2824 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2825 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2826 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2827 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2828 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2829
2830
2831 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2832 , EntryProbe, ReturnProbe); \
2833 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2834 , ReturnProbe); \
2835 \
2836 JNI_ENTRY(void, \
2837 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2838 jsize len, ElementType *buf)) \
2839 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2840 EntryProbe; \
2841 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2842 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2843 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2844 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2845 } else { \
2846 if (len > 0) { \
2847 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2848 memcpy((u_char*) buf, \
2849 (u_char*) src->Tag##_at_addr(start), \
2850 len << sc); \
2851 } \
2852 } \
2853 JNI_END
2854
2855 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2856 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2857 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2858 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2859 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2860 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2862 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2863 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2865 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2866 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2868 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2869 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2871 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2872 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2873 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2874 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2875 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2876 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2877 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2878 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2879
2880
2881 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2882 , EntryProbe, ReturnProbe); \
2883 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2884 ,ReturnProbe); \
2885 \
2886 JNI_ENTRY(void, \
2887 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2888 jsize len, const ElementType *buf)) \
2889 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2890 EntryProbe; \
2891 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2892 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2893 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2894 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2895 } else { \
2896 if (len > 0) { \
2897 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2898 memcpy((u_char*) dst->Tag##_at_addr(start), \
2899 (u_char*) buf, \
2900 len << sc); \
2901 } \
2902 } \
2903 JNI_END
2904
2905 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2906 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2907 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2909 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2910 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2912 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2913 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2915 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2916 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2918 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2919 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2921 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2922 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2923 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2924 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2925 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2926 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2927 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2928 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2929
2930
2931 //
2932 // Interception of natives
2933 //
2934
2935 // The RegisterNatives call being attempted tried to register with a method that
2936 // is not native. Ask JVM TI what prefixes have been specified. Then check
2937 // to see if the native method is now wrapped with the prefixes. See the
2938 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2939 static Method* find_prefixed_native(KlassHandle k,
2940 Symbol* name, Symbol* signature, TRAPS) {
2941 #if INCLUDE_JVMTI
2942 ResourceMark rm(THREAD);
2943 Method* method;
2944 int name_len = name->utf8_length();
2945 char* name_str = name->as_utf8();
2946 int prefix_count;
2947 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2948 for (int i = 0; i < prefix_count; i++) {
2949 char* prefix = prefixes[i];
2950 int prefix_len = (int)strlen(prefix);
2951
2952 // try adding this prefix to the method name and see if it matches another method name
2953 int trial_len = name_len + prefix_len;
2954 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2955 strcpy(trial_name_str, prefix);
2956 strcat(trial_name_str, name_str);
2957 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2958 if (trial_name == NULL) {
2959 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2960 }
2961 method = k()->lookup_method(trial_name, signature);
2962 if (method == NULL) {
2963 continue; // signature doesn't match, try the next prefix
2964 }
2965 if (method->is_native()) {
2966 method->set_is_prefixed_native();
2967 return method; // wahoo, we found a prefixed version of the method, return it
2968 }
2969 // found as non-native, so prefix is good, add it, probably just need more prefixes
2970 name_len = trial_len;
2971 name_str = trial_name_str;
2972 }
2973 #endif // INCLUDE_JVMTI
2974 return NULL; // not found
2975 }
2976
2977 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2978 Method* method = k()->lookup_method(name, signature);
2979 if (method == NULL) {
2980 ResourceMark rm;
2981 stringStream st;
2982 st.print("Method %s name or signature does not match",
2983 Method::name_and_sig_as_C_string(k(), name, signature));
2984 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2985 }
2986 if (!method->is_native()) {
2987 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2988 method = find_prefixed_native(k, name, signature, THREAD);
2989 if (method == NULL) {
2990 ResourceMark rm;
2991 stringStream st;
2992 st.print("Method %s is not declared as native",
2993 Method::name_and_sig_as_C_string(k(), name, signature));
2994 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2995 }
2996 }
2997
2998 if (entry != NULL) {
2999 method->set_native_function(entry,
3000 Method::native_bind_event_is_interesting);
3001 } else {
3002 method->clear_native_function();
3003 }
3004 if (PrintJNIResolving) {
3005 ResourceMark rm(THREAD);
3006 tty->print_cr("[Registering JNI native method %s.%s]",
3007 method->method_holder()->external_name(),
3008 method->name()->as_C_string());
3009 }
3010 return true;
3011 }
3012
3013 DT_RETURN_MARK_DECL(RegisterNatives, jint
3014 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3015
3016 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3017 const JNINativeMethod *methods,
3018 jint nMethods))
3019 JNIWrapper("RegisterNatives");
3020 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3021 jint ret = 0;
3022 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3023
3024 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3025
3026 for (int index = 0; index < nMethods; index++) {
3027 const char* meth_name = methods[index].name;
3028 const char* meth_sig = methods[index].signature;
3029 int meth_name_len = (int)strlen(meth_name);
3030
3031 // The class should have been loaded (we have an instance of the class
3032 // passed in) so the method and signature should already be in the symbol
3033 // table. If they're not there, the method doesn't exist.
3034 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3035 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3036
3037 if (name == NULL || signature == NULL) {
3038 ResourceMark rm;
3039 stringStream st;
3040 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3041 // Must return negative value on failure
3042 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3043 }
3044
3045 bool res = register_native(h_k, name, signature,
3046 (address) methods[index].fnPtr, THREAD);
3047 if (!res) {
3048 ret = -1;
3049 break;
3050 }
3051 }
3052 return ret;
3053 JNI_END
3054
3055
3056 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3057 JNIWrapper("UnregisterNatives");
3058 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3060 //%note jni_2
3061 if (k->oop_is_instance()) {
3062 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3063 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3064 if (m->is_native()) {
3065 m->clear_native_function();
3066 m->set_signature_handler(NULL);
3067 }
3068 }
3069 }
3070 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3071 return 0;
3072 JNI_END
3073
3074 //
3075 // Monitor functions
3076 //
3077
3078 DT_RETURN_MARK_DECL(MonitorEnter, jint
3079 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3080
3081 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3082 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3083 jint ret = JNI_ERR;
3084 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3085
3086 // If the object is null, we can't do anything with it
3087 if (jobj == NULL) {
3088 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3089 }
3090
3091 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3092 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3093 ret = JNI_OK;
3094 return ret;
3095 JNI_END
3096
3097 DT_RETURN_MARK_DECL(MonitorExit, jint
3098 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3099
3100 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3101 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3102 jint ret = JNI_ERR;
3103 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3104
3105 // Don't do anything with a null object
3106 if (jobj == NULL) {
3107 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3108 }
3109
3110 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3111 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3112
3113 ret = JNI_OK;
3114 return ret;
3115 JNI_END
3116
3117 //
3118 // Extensions
3119 //
3120
3121 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3122 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3123
3124 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3125 JNIWrapper("GetStringRegion");
3126 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3127 DT_VOID_RETURN_MARK(GetStringRegion);
3128 oop s = JNIHandles::resolve_non_null(string);
3129 int s_len = java_lang_String::length(s);
3130 if (start < 0 || len < 0 || start + len > s_len) {
3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132 } else {
3133 if (len > 0) {
3134 int s_offset = java_lang_String::offset(s);
3135 typeArrayOop s_value = java_lang_String::value(s);
3136 memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3137 }
3138 }
3139 JNI_END
3140
3141 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3142 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3143
3144 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3145 JNIWrapper("GetStringUTFRegion");
3146 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3147 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3148 oop s = JNIHandles::resolve_non_null(string);
3149 int s_len = java_lang_String::length(s);
3150 if (start < 0 || len < 0 || start + len > s_len) {
3151 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3152 } else {
3153 //%note jni_7
3154 if (len > 0) {
3155 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3156 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3157 // as_utf8_string null-terminates the result string
3158 } else {
3159 // JDK null-terminates the buffer even in len is zero
3160 if (buf != NULL) {
3161 buf[0] = 0;
3162 }
3163 }
3164 }
3165 JNI_END
3166
3167
3168 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3169 JNIWrapper("GetPrimitiveArrayCritical");
3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3171 GC_locker::lock_critical(thread);
3172 if (isCopy != NULL) {
3173 *isCopy = JNI_FALSE;
3174 }
3175 oop a = JNIHandles::resolve_non_null(array);
3176 assert(a->is_array(), "just checking");
3177 BasicType type;
3178 if (a->is_objArray()) {
3179 type = T_OBJECT;
3180 } else {
3181 type = TypeArrayKlass::cast(a->klass())->element_type();
3182 }
3183 void* ret = arrayOop(a)->base(type);
3184 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3185 return ret;
3186 JNI_END
3187
3188
3189 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3190 JNIWrapper("ReleasePrimitiveArrayCritical");
3191 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3192 // The array, carray and mode arguments are ignored
3193 GC_locker::unlock_critical(thread);
3194 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3195 JNI_END
3196
3197
3198 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3199 JNIWrapper("GetStringCritical");
3200 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3201 GC_locker::lock_critical(thread);
3202 if (isCopy != NULL) {
3203 *isCopy = JNI_FALSE;
3204 }
3205 oop s = JNIHandles::resolve_non_null(string);
3206 int s_len = java_lang_String::length(s);
3207 typeArrayOop s_value = java_lang_String::value(s);
3208 int s_offset = java_lang_String::offset(s);
3209 const jchar* ret;
3210 if (s_len > 0) {
3211 ret = s_value->char_at_addr(s_offset);
3212 } else {
3213 ret = (jchar*) s_value->base(T_CHAR);
3214 }
3215 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3216 return ret;
3217 JNI_END
3218
3219
3220 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3221 JNIWrapper("ReleaseStringCritical");
3222 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3223 // The str and chars arguments are ignored
3224 GC_locker::unlock_critical(thread);
3225 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3226 JNI_END
3227
3228
3229 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3230 JNIWrapper("jni_NewWeakGlobalRef");
3231 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3232 Handle ref_handle(thread, JNIHandles::resolve(ref));
3233 jweak ret = JNIHandles::make_weak_global(ref_handle);
3234 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3235 return ret;
3236 JNI_END
3237
3238 // Must be JNI_ENTRY (with HandleMark)
3239 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3240 JNIWrapper("jni_DeleteWeakGlobalRef");
3241 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3242 JNIHandles::destroy_weak_global(ref);
3243 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3244 JNI_END
3245
3246
3247 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3248 JNIWrapper("jni_ExceptionCheck");
3249 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3250 jni_check_async_exceptions(thread);
3251 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3252 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3253 return ret;
3254 JNI_END
3255
3256
3257 // Initialization state for three routines below relating to
3258 // java.nio.DirectBuffers
3259 static jint directBufferSupportInitializeStarted = 0;
3260 static volatile jint directBufferSupportInitializeEnded = 0;
3261 static volatile jint directBufferSupportInitializeFailed = 0;
3262 static jclass bufferClass = NULL;
3263 static jclass directBufferClass = NULL;
3264 static jclass directByteBufferClass = NULL;
3265 static jmethodID directByteBufferConstructor = NULL;
3266 static jfieldID directBufferAddressField = NULL;
3267 static jfieldID bufferCapacityField = NULL;
3268
3269 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3270 Handle loader; // null (bootstrap) loader
3271 Handle protection_domain; // null protection domain
3272
3273 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3274 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3275
3276 if (TraceClassResolution && result != NULL) {
3277 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3278 }
3279 return result;
3280 }
3281
3282 // These lookups are done with the NULL (bootstrap) ClassLoader to
3283 // circumvent any security checks that would be done by jni_FindClass.
3284 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3285 {
3286 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3287 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3288 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3289 return true;
3290 }
3291 JNI_END
3292
3293
3294 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3295 if (directBufferSupportInitializeFailed) {
3296 return false;
3297 }
3298
3299 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3300 if (!lookupDirectBufferClasses(env)) {
3301 directBufferSupportInitializeFailed = 1;
3302 return false;
3303 }
3304
3305 // Make global references for these
3306 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3307 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3308 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3309
3310 // Get needed field and method IDs
3311 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3312 if (env->ExceptionCheck()) {
3313 env->ExceptionClear();
3314 directBufferSupportInitializeFailed = 1;
3315 return false;
3316 }
3317 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3318 if (env->ExceptionCheck()) {
3319 env->ExceptionClear();
3320 directBufferSupportInitializeFailed = 1;
3321 return false;
3322 }
3323 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3324 if (env->ExceptionCheck()) {
3325 env->ExceptionClear();
3326 directBufferSupportInitializeFailed = 1;
3327 return false;
3328 }
3329
3330 if ((directByteBufferConstructor == NULL) ||
3331 (directBufferAddressField == NULL) ||
3332 (bufferCapacityField == NULL)) {
3333 directBufferSupportInitializeFailed = 1;
3334 return false;
3335 }
3336
3337 directBufferSupportInitializeEnded = 1;
3338 } else {
3339 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3340 // Set state as yield_all can call os:sleep. On Solaris, yield_all calls
3341 // os::sleep which requires the VM state transition. On other platforms, it
3342 // is not necessary. The following call to change the VM state is purposely
3343 // put inside the loop to avoid potential deadlock when multiple threads
3344 // try to call this method. See 6791815 for more details.
3345 ThreadInVMfromNative tivn(thread);
3346 os::yield_all();
3347 }
3348 }
3349
3350 return !directBufferSupportInitializeFailed;
3351 }
3352
3353 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3354 {
3355 // thread_from_jni_environment() will block if VM is gone.
3356 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3357
3358 JNIWrapper("jni_NewDirectByteBuffer");
3359 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3360
3361 if (!directBufferSupportInitializeEnded) {
3362 if (!initializeDirectBufferSupport(env, thread)) {
3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3364 return NULL;
3365 }
3366 }
3367
3368 // Being paranoid about accidental sign extension on address
3369 jlong addr = (jlong) ((uintptr_t) address);
3370 // NOTE that package-private DirectByteBuffer constructor currently
3371 // takes int capacity
3372 jint cap = (jint) capacity;
3373 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3374 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3375 return ret;
3376 }
3377
3378 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3379 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3380
3381 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3382 {
3383 // thread_from_jni_environment() will block if VM is gone.
3384 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3385
3386 JNIWrapper("jni_GetDirectBufferAddress");
3387 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3388 void* ret = NULL;
3389 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3390
3391 if (!directBufferSupportInitializeEnded) {
3392 if (!initializeDirectBufferSupport(env, thread)) {
3393 return 0;
3394 }
3395 }
3396
3397 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3398 return 0;
3399 }
3400
3401 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3402 return ret;
3403 }
3404
3405 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3406 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3407
3408 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3409 {
3410 // thread_from_jni_environment() will block if VM is gone.
3411 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3412
3413 JNIWrapper("jni_GetDirectBufferCapacity");
3414 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3415 jlong ret = -1;
3416 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3417
3418 if (!directBufferSupportInitializeEnded) {
3419 if (!initializeDirectBufferSupport(env, thread)) {
3420 ret = 0;
3421 return ret;
3422 }
3423 }
3424
3425 if (buf == NULL) {
3426 return -1;
3427 }
3428
3429 if (!env->IsInstanceOf(buf, directBufferClass)) {
3430 return -1;
3431 }
3432
3433 // NOTE that capacity is currently an int in the implementation
3434 ret = env->GetIntField(buf, bufferCapacityField);
3435 return ret;
3436 }
3437
3438
3439 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3440 JNIWrapper("GetVersion");
3441 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3442 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3443 return CurrentVersion;
3444 JNI_END
3445
3446 extern struct JavaVM_ main_vm;
3447
3448 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3449 JNIWrapper("jni_GetJavaVM");
3450 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3451 *vm = (JavaVM *)(&main_vm);
3452 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3453 return JNI_OK;
3454 JNI_END
3455
3456 // Structure containing all jni functions
3457 struct JNINativeInterface_ jni_NativeInterface = {
3458 NULL,
3459 NULL,
3460 NULL,
3461
3462 NULL,
3463
3464 jni_GetVersion,
3465
3466 jni_DefineClass,
3467 jni_FindClass,
3468
3469 jni_FromReflectedMethod,
3470 jni_FromReflectedField,
3471
3472 jni_ToReflectedMethod,
3473
3474 jni_GetSuperclass,
3475 jni_IsAssignableFrom,
3476
3477 jni_ToReflectedField,
3478
3479 jni_Throw,
3480 jni_ThrowNew,
3481 jni_ExceptionOccurred,
3482 jni_ExceptionDescribe,
3483 jni_ExceptionClear,
3484 jni_FatalError,
3485
3486 jni_PushLocalFrame,
3487 jni_PopLocalFrame,
3488
3489 jni_NewGlobalRef,
3490 jni_DeleteGlobalRef,
3491 jni_DeleteLocalRef,
3492 jni_IsSameObject,
3493
3494 jni_NewLocalRef,
3495 jni_EnsureLocalCapacity,
3496
3497 jni_AllocObject,
3498 jni_NewObject,
3499 jni_NewObjectV,
3500 jni_NewObjectA,
3501
3502 jni_GetObjectClass,
3503 jni_IsInstanceOf,
3504
3505 jni_GetMethodID,
3506
3507 jni_CallObjectMethod,
3508 jni_CallObjectMethodV,
3509 jni_CallObjectMethodA,
3510 jni_CallBooleanMethod,
3511 jni_CallBooleanMethodV,
3512 jni_CallBooleanMethodA,
3513 jni_CallByteMethod,
3514 jni_CallByteMethodV,
3515 jni_CallByteMethodA,
3516 jni_CallCharMethod,
3517 jni_CallCharMethodV,
3518 jni_CallCharMethodA,
3519 jni_CallShortMethod,
3520 jni_CallShortMethodV,
3521 jni_CallShortMethodA,
3522 jni_CallIntMethod,
3523 jni_CallIntMethodV,
3524 jni_CallIntMethodA,
3525 jni_CallLongMethod,
3526 jni_CallLongMethodV,
3527 jni_CallLongMethodA,
3528 jni_CallFloatMethod,
3529 jni_CallFloatMethodV,
3530 jni_CallFloatMethodA,
3531 jni_CallDoubleMethod,
3532 jni_CallDoubleMethodV,
3533 jni_CallDoubleMethodA,
3534 jni_CallVoidMethod,
3535 jni_CallVoidMethodV,
3536 jni_CallVoidMethodA,
3537
3538 jni_CallNonvirtualObjectMethod,
3539 jni_CallNonvirtualObjectMethodV,
3540 jni_CallNonvirtualObjectMethodA,
3541 jni_CallNonvirtualBooleanMethod,
3542 jni_CallNonvirtualBooleanMethodV,
3543 jni_CallNonvirtualBooleanMethodA,
3544 jni_CallNonvirtualByteMethod,
3545 jni_CallNonvirtualByteMethodV,
3546 jni_CallNonvirtualByteMethodA,
3547 jni_CallNonvirtualCharMethod,
3548 jni_CallNonvirtualCharMethodV,
3549 jni_CallNonvirtualCharMethodA,
3550 jni_CallNonvirtualShortMethod,
3551 jni_CallNonvirtualShortMethodV,
3552 jni_CallNonvirtualShortMethodA,
3553 jni_CallNonvirtualIntMethod,
3554 jni_CallNonvirtualIntMethodV,
3555 jni_CallNonvirtualIntMethodA,
3556 jni_CallNonvirtualLongMethod,
3557 jni_CallNonvirtualLongMethodV,
3558 jni_CallNonvirtualLongMethodA,
3559 jni_CallNonvirtualFloatMethod,
3560 jni_CallNonvirtualFloatMethodV,
3561 jni_CallNonvirtualFloatMethodA,
3562 jni_CallNonvirtualDoubleMethod,
3563 jni_CallNonvirtualDoubleMethodV,
3564 jni_CallNonvirtualDoubleMethodA,
3565 jni_CallNonvirtualVoidMethod,
3566 jni_CallNonvirtualVoidMethodV,
3567 jni_CallNonvirtualVoidMethodA,
3568
3569 jni_GetFieldID,
3570
3571 jni_GetObjectField,
3572 jni_GetBooleanField,
3573 jni_GetByteField,
3574 jni_GetCharField,
3575 jni_GetShortField,
3576 jni_GetIntField,
3577 jni_GetLongField,
3578 jni_GetFloatField,
3579 jni_GetDoubleField,
3580
3581 jni_SetObjectField,
3582 jni_SetBooleanField,
3583 jni_SetByteField,
3584 jni_SetCharField,
3585 jni_SetShortField,
3586 jni_SetIntField,
3587 jni_SetLongField,
3588 jni_SetFloatField,
3589 jni_SetDoubleField,
3590
3591 jni_GetStaticMethodID,
3592
3593 jni_CallStaticObjectMethod,
3594 jni_CallStaticObjectMethodV,
3595 jni_CallStaticObjectMethodA,
3596 jni_CallStaticBooleanMethod,
3597 jni_CallStaticBooleanMethodV,
3598 jni_CallStaticBooleanMethodA,
3599 jni_CallStaticByteMethod,
3600 jni_CallStaticByteMethodV,
3601 jni_CallStaticByteMethodA,
3602 jni_CallStaticCharMethod,
3603 jni_CallStaticCharMethodV,
3604 jni_CallStaticCharMethodA,
3605 jni_CallStaticShortMethod,
3606 jni_CallStaticShortMethodV,
3607 jni_CallStaticShortMethodA,
3608 jni_CallStaticIntMethod,
3609 jni_CallStaticIntMethodV,
3610 jni_CallStaticIntMethodA,
3611 jni_CallStaticLongMethod,
3612 jni_CallStaticLongMethodV,
3613 jni_CallStaticLongMethodA,
3614 jni_CallStaticFloatMethod,
3615 jni_CallStaticFloatMethodV,
3616 jni_CallStaticFloatMethodA,
3617 jni_CallStaticDoubleMethod,
3618 jni_CallStaticDoubleMethodV,
3619 jni_CallStaticDoubleMethodA,
3620 jni_CallStaticVoidMethod,
3621 jni_CallStaticVoidMethodV,
3622 jni_CallStaticVoidMethodA,
3623
3624 jni_GetStaticFieldID,
3625
3626 jni_GetStaticObjectField,
3627 jni_GetStaticBooleanField,
3628 jni_GetStaticByteField,
3629 jni_GetStaticCharField,
3630 jni_GetStaticShortField,
3631 jni_GetStaticIntField,
3632 jni_GetStaticLongField,
3633 jni_GetStaticFloatField,
3634 jni_GetStaticDoubleField,
3635
3636 jni_SetStaticObjectField,
3637 jni_SetStaticBooleanField,
3638 jni_SetStaticByteField,
3639 jni_SetStaticCharField,
3640 jni_SetStaticShortField,
3641 jni_SetStaticIntField,
3642 jni_SetStaticLongField,
3643 jni_SetStaticFloatField,
3644 jni_SetStaticDoubleField,
3645
3646 jni_NewString,
3647 jni_GetStringLength,
3648 jni_GetStringChars,
3649 jni_ReleaseStringChars,
3650
3651 jni_NewStringUTF,
3652 jni_GetStringUTFLength,
3653 jni_GetStringUTFChars,
3654 jni_ReleaseStringUTFChars,
3655
3656 jni_GetArrayLength,
3657
3658 jni_NewObjectArray,
3659 jni_GetObjectArrayElement,
3660 jni_SetObjectArrayElement,
3661
3662 jni_NewBooleanArray,
3663 jni_NewByteArray,
3664 jni_NewCharArray,
3665 jni_NewShortArray,
3666 jni_NewIntArray,
3667 jni_NewLongArray,
3668 jni_NewFloatArray,
3669 jni_NewDoubleArray,
3670
3671 jni_GetBooleanArrayElements,
3672 jni_GetByteArrayElements,
3673 jni_GetCharArrayElements,
3674 jni_GetShortArrayElements,
3675 jni_GetIntArrayElements,
3676 jni_GetLongArrayElements,
3677 jni_GetFloatArrayElements,
3678 jni_GetDoubleArrayElements,
3679
3680 jni_ReleaseBooleanArrayElements,
3681 jni_ReleaseByteArrayElements,
3682 jni_ReleaseCharArrayElements,
3683 jni_ReleaseShortArrayElements,
3684 jni_ReleaseIntArrayElements,
3685 jni_ReleaseLongArrayElements,
3686 jni_ReleaseFloatArrayElements,
3687 jni_ReleaseDoubleArrayElements,
3688
3689 jni_GetBooleanArrayRegion,
3690 jni_GetByteArrayRegion,
3691 jni_GetCharArrayRegion,
3692 jni_GetShortArrayRegion,
3693 jni_GetIntArrayRegion,
3694 jni_GetLongArrayRegion,
3695 jni_GetFloatArrayRegion,
3696 jni_GetDoubleArrayRegion,
3697
3698 jni_SetBooleanArrayRegion,
3699 jni_SetByteArrayRegion,
3700 jni_SetCharArrayRegion,
3701 jni_SetShortArrayRegion,
3702 jni_SetIntArrayRegion,
3703 jni_SetLongArrayRegion,
3704 jni_SetFloatArrayRegion,
3705 jni_SetDoubleArrayRegion,
3706
3707 jni_RegisterNatives,
3708 jni_UnregisterNatives,
3709
3710 jni_MonitorEnter,
3711 jni_MonitorExit,
3712
3713 jni_GetJavaVM,
3714
3715 jni_GetStringRegion,
3716 jni_GetStringUTFRegion,
3717
3718 jni_GetPrimitiveArrayCritical,
3719 jni_ReleasePrimitiveArrayCritical,
3720
3721 jni_GetStringCritical,
3722 jni_ReleaseStringCritical,
3723
3724 jni_NewWeakGlobalRef,
3725 jni_DeleteWeakGlobalRef,
3726
3727 jni_ExceptionCheck,
3728
3729 jni_NewDirectByteBuffer,
3730 jni_GetDirectBufferAddress,
3731 jni_GetDirectBufferCapacity,
3732
3733 // New 1_6 features
3734
3735 jni_GetObjectRefType
3736 };
3737
3738
3739 // For jvmti use to modify jni function table.
3740 // Java threads in native contiues to run until it is transitioned
3741 // to VM at safepoint. Before the transition or before it is blocked
3742 // for safepoint it may access jni function table. VM could crash if
3743 // any java thread access the jni function table in the middle of memcpy.
3744 // To avoid this each function pointers are copied automically.
3745 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3746 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3747 intptr_t *a = (intptr_t *) jni_functions();
3748 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3749 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3750 Atomic::store_ptr(*b++, a++);
3751 }
3752 }
3753
3754 void quicken_jni_functions() {
3755 // Replace Get<Primitive>Field with fast versions
3756 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3757 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3758 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3759 // windows x86 currently needs SEH wrapper and the gain of the fast
3760 // versions currently isn't certain for server vm on uniprocessor.
3761 && os::is_MP()
3762 #endif
3763 ) {
3764 address func;
3765 func = JNI_FastGetField::generate_fast_get_boolean_field();
3766 if (func != (address)-1) {
3767 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3768 }
3769 func = JNI_FastGetField::generate_fast_get_byte_field();
3770 if (func != (address)-1) {
3771 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3772 }
3773 func = JNI_FastGetField::generate_fast_get_char_field();
3774 if (func != (address)-1) {
3775 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3776 }
3777 func = JNI_FastGetField::generate_fast_get_short_field();
3778 if (func != (address)-1) {
3779 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3780 }
3781 func = JNI_FastGetField::generate_fast_get_int_field();
3782 if (func != (address)-1) {
3783 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3784 }
3785 func = JNI_FastGetField::generate_fast_get_long_field();
3786 if (func != (address)-1) {
3787 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3788 }
3789 func = JNI_FastGetField::generate_fast_get_float_field();
3790 if (func != (address)-1) {
3791 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3792 }
3793 func = JNI_FastGetField::generate_fast_get_double_field();
3794 if (func != (address)-1) {
3795 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3796 }
3797 }
3798 }
3799
3800 // Returns the function structure
3801 struct JNINativeInterface_* jni_functions() {
3802 #if INCLUDE_JNI_CHECK
3803 if (CheckJNICalls) return jni_functions_check();
3804 #endif // INCLUDE_JNI_CHECK
3805 return &jni_NativeInterface;
3806 }
3807
3808 // Returns the function structure
3809 struct JNINativeInterface_* jni_functions_nocheck() {
3810 return &jni_NativeInterface;
3811 }
3812
3813
3814 // Invocation API
3815
3816
3817 // Forward declaration
3818 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3819
3820 // Global invocation API vars
3821 volatile jint vm_created = 0;
3822 // Indicate whether it is safe to recreate VM
3823 volatile jint safe_to_recreate_vm = 1;
3824 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3825
3826
3827 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3828 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3829
3830 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3831 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3832
3833 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3834 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3835 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3836 jint ret = JNI_ERR;
3837 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3838
3839 if (Threads::is_supported_jni_version(args->version)) {
3840 ret = JNI_OK;
3841 }
3842 // 1.1 style no longer supported in hotspot.
3843 // According the JNI spec, we should update args->version on return.
3844 // We also use the structure to communicate with launcher about default
3845 // stack size.
3846 if (args->version == JNI_VERSION_1_1) {
3847 args->version = JNI_VERSION_1_2;
3848 // javaStackSize is int in arguments structure
3849 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3850 args->javaStackSize = (jint)(ThreadStackSize * K);
3851 }
3852 return ret;
3853 }
3854
3855 #ifndef PRODUCT
3856
3857 #include "gc_implementation/shared/gcTimer.hpp"
3858 #include "gc_interface/collectedHeap.hpp"
3859 #if INCLUDE_ALL_GCS
3860 #include "gc_implementation/g1/heapRegionRemSet.hpp"
3861 #endif
3862 #include "memory/guardedMemory.hpp"
3863 #include "utilities/quickSort.hpp"
3864 #include "utilities/ostream.hpp"
3865 #if INCLUDE_VM_STRUCTS
3866 #include "runtime/vmStructs.hpp"
3867 #endif
3868
3869 #define run_unit_test(unit_test_function_call) \
3870 tty->print_cr("Running test: " #unit_test_function_call); \
3871 unit_test_function_call
3872
3873 // Forward declaration
3874 void TestOS_test();
3875 void TestReservedSpace_test();
3876 void TestReserveMemorySpecial_test();
3877 void TestVirtualSpace_test();
3878 void TestMetaspaceAux_test();
3879 void TestMetachunk_test();
3880 void TestVirtualSpaceNode_test();
3881 void TestNewSize_test();
3882 void TestOldSize_test();
3883 void TestKlass_test();
3884 void TestBitMap_test();
3885 void TestAsUtf8();
3886 #if INCLUDE_ALL_GCS
3887 void TestOldFreeSpaceCalculation_test();
3888 void TestG1BiasedArray_test();
3889 void TestBufferingOopClosure_test();
3890 void TestCodeCacheRemSet_test();
3891 #endif
3892
3893 void execute_internal_vm_tests() {
3894 if (ExecuteInternalVMTests) {
3895 tty->print_cr("Running internal VM tests");
3896 run_unit_test(TestOS_test());
3897 run_unit_test(TestReservedSpace_test());
3898 run_unit_test(TestReserveMemorySpecial_test());
3899 run_unit_test(TestVirtualSpace_test());
3900 run_unit_test(TestMetaspaceAux_test());
3901 run_unit_test(TestMetachunk_test());
3902 run_unit_test(TestVirtualSpaceNode_test());
3903 run_unit_test(GlobalDefinitions::test_globals());
3904 run_unit_test(GCTimerAllTest::all());
3905 run_unit_test(arrayOopDesc::test_max_array_length());
3906 run_unit_test(CollectedHeap::test_is_in());
3907 run_unit_test(QuickSort::test_quick_sort());
3908 run_unit_test(GuardedMemory::test_guarded_memory());
3909 run_unit_test(AltHashing::test_alt_hash());
3910 run_unit_test(test_loggc_filename());
3911 run_unit_test(TestNewSize_test());
3912 run_unit_test(TestOldSize_test());
3913 run_unit_test(TestKlass_test());
3914 run_unit_test(TestBitMap_test());
3915 run_unit_test(TestAsUtf8());
3916 #if INCLUDE_VM_STRUCTS
3917 run_unit_test(VMStructs::test());
3918 #endif
3919 #if INCLUDE_ALL_GCS
3920 run_unit_test(TestOldFreeSpaceCalculation_test());
3921 run_unit_test(TestG1BiasedArray_test());
3922 run_unit_test(HeapRegionRemSet::test_prt());
3923 run_unit_test(TestBufferingOopClosure_test());
3924 run_unit_test(TestCodeCacheRemSet_test());
3925 #endif
3926 tty->print_cr("All internal VM tests passed");
3927 }
3928 }
3929
3930 #undef run_unit_test
3931
3932 #endif
3933
3934 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3935 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3936
3937 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
3938 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3939
3940 jint result = JNI_ERR;
3941 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3942
3943 // We're about to use Atomic::xchg for synchronization. Some Zero
3944 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3945 // but __sync_lock_test_and_set is not guaranteed to do what we want
3946 // on all architectures. So we check it works before relying on it.
3947 #if defined(ZERO) && defined(ASSERT)
3948 {
3949 jint a = 0xcafebabe;
3950 jint b = Atomic::xchg(0xdeadbeef, &a);
3951 void *c = &a;
3952 void *d = Atomic::xchg_ptr(&b, &c);
3953 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3954 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3955 }
3956 #endif // ZERO && ASSERT
3957
3958 // At the moment it's only possible to have one Java VM,
3959 // since some of the runtime state is in global variables.
3960
3961 // We cannot use our mutex locks here, since they only work on
3962 // Threads. We do an atomic compare and exchange to ensure only
3963 // one thread can call this method at a time
3964
3965 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3966 // the add/dec implementations are dependent on whether we are running
3967 // on a multiprocessor, and at this stage of initialization the os::is_MP
3968 // function used to determine this will always return false. Atomic::xchg
3969 // does not have this problem.
3970 if (Atomic::xchg(1, &vm_created) == 1) {
3971 return JNI_EEXIST; // already created, or create attempt in progress
3972 }
3973 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3974 return JNI_ERR; // someone tried and failed and retry not allowed.
3975 }
3976
3977 assert(vm_created == 1, "vm_created is true during the creation");
3978
3979 /**
3980 * Certain errors during initialization are recoverable and do not
3981 * prevent this method from being called again at a later time
3982 * (perhaps with different arguments). However, at a certain
3983 * point during initialization if an error occurs we cannot allow
3984 * this function to be called again (or it will crash). In those
3985 * situations, the 'canTryAgain' flag is set to false, which atomically
3986 * sets safe_to_recreate_vm to 1, such that any new call to
3987 * JNI_CreateJavaVM will immediately fail using the above logic.
3988 */
3989 bool can_try_again = true;
3990
3991 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3992 if (result == JNI_OK) {
3993 JavaThread *thread = JavaThread::current();
3994 assert(!thread->has_pending_exception(), "should have returned not OK");
3995 /* thread is thread_in_vm here */
3996 *vm = (JavaVM *)(&main_vm);
3997 *(JNIEnv**)penv = thread->jni_environment();
3998
3999 // Tracks the time application was running before GC
4000 RuntimeService::record_application_start();
4001
4002 // Notify JVMTI
4003 if (JvmtiExport::should_post_thread_life()) {
4004 JvmtiExport::post_thread_start(thread);
4005 }
4006
4007 EventThreadStart event;
4008 if (event.should_commit()) {
4009 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4010 event.commit();
4011 }
4012
4013 #ifndef PRODUCT
4014 #ifndef CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED
4015 #define CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(f) f()
4016 #endif
4017
4018 // Check if we should compile all classes on bootclasspath
4019 if (CompileTheWorld) ClassLoader::compile_the_world();
4020 if (ReplayCompiles) ciReplay::replay(thread);
4021
4022 // Some platforms (like Win*) need a wrapper around these test
4023 // functions in order to properly handle error conditions.
4024 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(test_error_handler);
4025 CALL_TEST_FUNC_WITH_WRAPPER_IF_NEEDED(execute_internal_vm_tests);
4026 #endif
4027
4028 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4029 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4030 } else {
4031 // If create_vm exits because of a pending exception, exit with that
4032 // exception. In the future when we figure out how to reclaim memory,
4033 // we may be able to exit with JNI_ERR and allow the calling application
4034 // to continue.
4035 if (Universe::is_fully_initialized()) {
4036 // otherwise no pending exception possible - VM will already have aborted
4037 JavaThread* THREAD = JavaThread::current();
4038 if (HAS_PENDING_EXCEPTION) {
4039 HandleMark hm;
4040 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4041 }
4042 }
4043
4044 if (can_try_again) {
4045 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4046 safe_to_recreate_vm = 1;
4047 }
4048
4049 // Creation failed. We must reset vm_created
4050 *vm = 0;
4051 *(JNIEnv**)penv = 0;
4052 // reset vm_created last to avoid race condition. Use OrderAccess to
4053 // control both compiler and architectural-based reordering.
4054 OrderAccess::release_store(&vm_created, 0);
4055 }
4056
4057 return result;
4058 }
4059
4060
4061 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4062 // See bug 4367188, the wrapper can sometimes cause VM crashes
4063 // JNIWrapper("GetCreatedJavaVMs");
4064
4065 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4066
4067 if (vm_created) {
4068 if (numVMs != NULL) *numVMs = 1;
4069 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4070 } else {
4071 if (numVMs != NULL) *numVMs = 0;
4072 }
4073 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4074 return JNI_OK;
4075 }
4076
4077 extern "C" {
4078
4079 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4080 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4081
4082 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4083 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4084 jint res = JNI_ERR;
4085 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4086
4087 if (!vm_created) {
4088 res = JNI_ERR;
4089 return res;
4090 }
4091
4092 JNIWrapper("DestroyJavaVM");
4093 JNIEnv *env;
4094 JavaVMAttachArgs destroyargs;
4095 destroyargs.version = CurrentVersion;
4096 destroyargs.name = (char *)"DestroyJavaVM";
4097 destroyargs.group = NULL;
4098 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4099 if (res != JNI_OK) {
4100 return res;
4101 }
4102
4103 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4104 JavaThread* thread = JavaThread::current();
4105 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4106 if (Threads::destroy_vm()) {
4107 // Should not change thread state, VM is gone
4108 vm_created = false;
4109 res = JNI_OK;
4110 return res;
4111 } else {
4112 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4113 res = JNI_ERR;
4114 return res;
4115 }
4116 }
4117
4118
4119 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4120 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4121
4122 // Check below commented out from JDK1.2fcs as well
4123 /*
4124 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4125 return JNI_EVERSION;
4126 }
4127 */
4128
4129 Thread* t = ThreadLocalStorage::get_thread_slow();
4130 if (t != NULL) {
4131 // If the thread has been attached this operation is a no-op
4132 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4133 return JNI_OK;
4134 }
4135
4136 // Create a thread and mark it as attaching so it will be skipped by the
4137 // ThreadsListEnumerator - see CR 6404306
4138 JavaThread* thread = new JavaThread(true);
4139
4140 // Set correct safepoint info. The thread is going to call into Java when
4141 // initializing the Java level thread object. Hence, the correct state must
4142 // be set in order for the Safepoint code to deal with it correctly.
4143 thread->set_thread_state(_thread_in_vm);
4144 // Must do this before initialize_thread_local_storage
4145 thread->record_stack_base_and_size();
4146
4147 thread->initialize_thread_local_storage();
4148
4149 if (!os::create_attached_thread(thread)) {
4150 delete thread;
4151 return JNI_ERR;
4152 }
4153 // Enable stack overflow checks
4154 thread->create_stack_guard_pages();
4155
4156 thread->initialize_tlab();
4157
4158 thread->cache_global_variables();
4159
4160 // Crucial that we do not have a safepoint check for this thread, since it has
4161 // not been added to the Thread list yet.
4162 { Threads_lock->lock_without_safepoint_check();
4163 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4164 // avoid this thread trying to do a GC before it is added to the thread-list
4165 thread->set_active_handles(JNIHandleBlock::allocate_block());
4166 Threads::add(thread, daemon);
4167 Threads_lock->unlock();
4168 }
4169 // Create thread group and name info from attach arguments
4170 oop group = NULL;
4171 char* thread_name = NULL;
4172 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4173 group = JNIHandles::resolve(args->group);
4174 thread_name = args->name; // may be NULL
4175 }
4176 if (group == NULL) group = Universe::main_thread_group();
4177
4178 // Create Java level thread object and attach it to this thread
4179 bool attach_failed = false;
4180 {
4181 EXCEPTION_MARK;
4182 HandleMark hm(THREAD);
4183 Handle thread_group(THREAD, group);
4184 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4185 if (HAS_PENDING_EXCEPTION) {
4186 CLEAR_PENDING_EXCEPTION;
4187 // cleanup outside the handle mark.
4188 attach_failed = true;
4189 }
4190 }
4191
4192 if (attach_failed) {
4193 // Added missing cleanup
4194 thread->cleanup_failed_attach_current_thread();
4195 return JNI_ERR;
4196 }
4197
4198 // mark the thread as no longer attaching
4199 // this uses a fence to push the change through so we don't have
4200 // to regrab the threads_lock
4201 thread->set_done_attaching_via_jni();
4202
4203 // Set java thread status.
4204 java_lang_Thread::set_thread_status(thread->threadObj(),
4205 java_lang_Thread::RUNNABLE);
4206
4207 // Notify the debugger
4208 if (JvmtiExport::should_post_thread_life()) {
4209 JvmtiExport::post_thread_start(thread);
4210 }
4211
4212 EventThreadStart event;
4213 if (event.should_commit()) {
4214 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4215 event.commit();
4216 }
4217
4218 *(JNIEnv**)penv = thread->jni_environment();
4219
4220 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4221 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4222 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4223 // needed.
4224
4225 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4226
4227 // Perform any platform dependent FPU setup
4228 os::setup_fpu();
4229
4230 return JNI_OK;
4231 }
4232
4233
4234 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4235 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4236 if (!vm_created) {
4237 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4238 return JNI_ERR;
4239 }
4240
4241 JNIWrapper("AttachCurrentThread");
4242 jint ret = attach_current_thread(vm, penv, _args, false);
4243 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4244 return ret;
4245 }
4246
4247
4248 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4249 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4250 VM_Exit::block_if_vm_exited();
4251
4252 JNIWrapper("DetachCurrentThread");
4253
4254 // If the thread has been deattacted the operations is a no-op
4255 if (ThreadLocalStorage::thread() == NULL) {
4256 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4257 return JNI_OK;
4258 }
4259
4260 JavaThread* thread = JavaThread::current();
4261 if (thread->has_last_Java_frame()) {
4262 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4263 // Can't detach a thread that's running java, that can't work.
4264 return JNI_ERR;
4265 }
4266
4267 // Safepoint support. Have to do call-back to safepoint code, if in the
4268 // middel of a safepoint operation
4269 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4270
4271 // XXX: Note that JavaThread::exit() call below removes the guards on the
4272 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4273 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4274 // of the guards is visible in jni_AttachCurrentThread above,
4275 // the removal of the guards is buried below in JavaThread::exit()
4276 // here. The abstraction should be more symmetrically either exposed
4277 // or hidden (e.g. it could probably be hidden in the same
4278 // (platform-dependent) methods where we do alternate stack
4279 // maintenance work?)
4280 thread->exit(false, JavaThread::jni_detach);
4281 delete thread;
4282
4283 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4284 return JNI_OK;
4285 }
4286
4287 DT_RETURN_MARK_DECL(GetEnv, jint
4288 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4289
4290 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4291 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4292 jint ret = JNI_ERR;
4293 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4294
4295 if (!vm_created) {
4296 *penv = NULL;
4297 ret = JNI_EDETACHED;
4298 return ret;
4299 }
4300
4301 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4302 return ret;
4303 }
4304
4305 #ifndef JVMPI_VERSION_1
4306 // need these in order to be polite about older agents
4307 #define JVMPI_VERSION_1 ((jint)0x10000001)
4308 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4309 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4310 #endif // !JVMPI_VERSION_1
4311
4312 Thread* thread = ThreadLocalStorage::thread();
4313 if (thread != NULL && thread->is_Java_thread()) {
4314 if (Threads::is_supported_jni_version_including_1_1(version)) {
4315 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4316 ret = JNI_OK;
4317 return ret;
4318
4319 } else if (version == JVMPI_VERSION_1 ||
4320 version == JVMPI_VERSION_1_1 ||
4321 version == JVMPI_VERSION_1_2) {
4322 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4323 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4324 ret = JNI_EVERSION;
4325 return ret;
4326 } else if (JvmtiExport::is_jvmdi_version(version)) {
4327 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4328 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4329 ret = JNI_EVERSION;
4330 return ret;
4331 } else {
4332 *penv = NULL;
4333 ret = JNI_EVERSION;
4334 return ret;
4335 }
4336 } else {
4337 *penv = NULL;
4338 ret = JNI_EDETACHED;
4339 return ret;
4340 }
4341 }
4342
4343
4344 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4345 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4346 if (!vm_created) {
4347 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4348 return JNI_ERR;
4349 }
4350
4351 JNIWrapper("AttachCurrentThreadAsDaemon");
4352 jint ret = attach_current_thread(vm, penv, _args, true);
4353 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4354 return ret;
4355 }
4356
4357
4358 } // End extern "C"
4359
4360 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4361 NULL,
4362 NULL,
4363 NULL,
4364
4365 jni_DestroyJavaVM,
4366 jni_AttachCurrentThread,
4367 jni_DetachCurrentThread,
4368 jni_GetEnv,
4369 jni_AttachCurrentThreadAsDaemon
4370 };