1 /*
2 * Copyright (c) 1997, 2018, 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 "jni.h"
28 #include "jvm.h"
29 #include "ci/ciReplay.hpp"
30 #include "classfile/altHashing.hpp"
31 #include "classfile/classFileStream.hpp"
32 #include "classfile/classLoader.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "classfile/javaClasses.inline.hpp"
35 #include "classfile/modules.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/gcLocker.inline.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "jfr/support/jfrThreadId.hpp"
43 #include "logging/log.hpp"
44 #include "memory/allocation.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/arrayOop.inline.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/instanceOop.hpp"
53 #include "oops/markOop.hpp"
54 #include "oops/method.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "oops/typeArrayKlass.hpp"
60 #include "oops/typeArrayOop.inline.hpp"
61 #include "prims/jniCheck.hpp"
62 #include "prims/jniExport.hpp"
63 #include "prims/jniFastGetField.hpp"
64 #include "prims/jvm_misc.hpp"
65 #include "prims/jvmtiExport.hpp"
66 #include "prims/jvmtiThreadState.hpp"
67 #include "runtime/atomic.hpp"
68 #include "runtime/compilationPolicy.hpp"
69 #include "runtime/fieldDescriptor.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jfieldIDWorkaround.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/orderAccess.inline.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/thread.inline.hpp"
82 #include "runtime/vm_operations.hpp"
83 #include "services/memTracker.hpp"
84 #include "services/runtimeService.hpp"
85 #include "utilities/defaultStream.hpp"
86 #include "utilities/dtrace.hpp"
87 #include "utilities/events.hpp"
88 #include "utilities/histogram.hpp"
89 #include "utilities/internalVMTests.hpp"
90 #include "utilities/macros.hpp"
91 #include "utilities/vmError.hpp"
92 #if INCLUDE_JVMCI
93 #include "jvmci/jvmciCompiler.hpp"
94 #include "jvmci/jvmciRuntime.hpp"
95 #endif
96
97 static jint CurrentVersion = JNI_VERSION_10;
98
99 #ifdef _WIN32
100 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
101 #endif
102
103 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
104 // '-return' probe regardless of the return path is taken out of the function.
105 // Methods that have multiple return paths use this to avoid having to
106 // instrument each return path. Methods that use CHECK or THROW must use this
107 // since those macros can cause an immedate uninstrumented return.
108 //
109 // In order to get the return value, a reference to the variable containing
110 // the return value must be passed to the contructor of the object, and
111 // the return value must be set before return (since the mark object has
112 // a reference to it).
113 //
114 // Example:
115 // DT_RETURN_MARK_DECL(SomeFunc, int);
116 // JNI_ENTRY(int, SomeFunc, ...)
117 // int return_value = 0;
118 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
119 // foo(CHECK_0)
120 // return_value = 5;
121 // return return_value;
122 // JNI_END
123 #define DT_RETURN_MARK_DECL(name, type, probe) \
124 DTRACE_ONLY( \
125 class DTraceReturnProbeMark_##name { \
126 public: \
127 const type& _ret_ref; \
128 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
129 ~DTraceReturnProbeMark_##name() { \
130 probe; \
131 } \
132 } \
133 )
134 // Void functions are simpler since there's no return value
135 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
136 DTRACE_ONLY( \
137 class DTraceReturnProbeMark_##name { \
138 public: \
139 ~DTraceReturnProbeMark_##name() { \
140 probe; \
141 } \
142 } \
143 )
144
145 // Place these macros in the function to mark the return. Non-void
146 // functions need the type and address of the return value.
147 #define DT_RETURN_MARK(name, type, ref) \
148 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
149 #define DT_VOID_RETURN_MARK(name) \
150 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
151
152
153 // Use these to select distinct code for floating-point vs. non-floating point
154 // situations. Used from within common macros where we need slightly
155 // different behavior for Float/Double
156 #define FP_SELECT_Boolean(intcode, fpcode) intcode
157 #define FP_SELECT_Byte(intcode, fpcode) intcode
158 #define FP_SELECT_Char(intcode, fpcode) intcode
159 #define FP_SELECT_Short(intcode, fpcode) intcode
160 #define FP_SELECT_Object(intcode, fpcode) intcode
161 #define FP_SELECT_Int(intcode, fpcode) intcode
162 #define FP_SELECT_Long(intcode, fpcode) intcode
163 #define FP_SELECT_Float(intcode, fpcode) fpcode
164 #define FP_SELECT_Double(intcode, fpcode) fpcode
165 #define FP_SELECT(TypeName, intcode, fpcode) \
166 FP_SELECT_##TypeName(intcode, fpcode)
167
168 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
169 // (dtrace doesn't do FP yet)
170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
171 FP_SELECT(TypeName, \
172 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
174 FP_SELECT(TypeName, \
175 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
176
177
178 // out-of-line helpers for class jfieldIDWorkaround:
179
180 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
181 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
182 uintptr_t as_uint = (uintptr_t) id;
183 intptr_t offset = raw_instance_offset(id);
184 if (is_checked_jfieldID(id)) {
185 if (!klass_hash_ok(k, id)) {
186 return false;
187 }
188 }
189 return InstanceKlass::cast(k)->contains_field_offset(offset);
190 } else {
191 JNIid* result = (JNIid*) id;
192 #ifdef ASSERT
193 return result != NULL && result->is_static_field_id();
194 #else
195 return result != NULL;
196 #endif
197 }
198 }
199
200
201 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
202 if (offset <= small_offset_mask) {
203 Klass* field_klass = k;
204 Klass* super_klass = field_klass->super();
205 // With compressed oops the most super class with nonstatic fields would
206 // be the owner of fields embedded in the header.
207 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
208 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
209 field_klass = super_klass; // super contains the field also
210 super_klass = field_klass->super();
211 }
212 debug_only(NoSafepointVerifier nosafepoint;)
213 uintptr_t klass_hash = field_klass->identity_hash();
214 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
215 } else {
216 #if 0
217 #ifndef PRODUCT
218 {
219 ResourceMark rm;
220 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
221 }
222 #endif
223 #endif
224 return 0;
225 }
226 }
227
228 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
229 uintptr_t as_uint = (uintptr_t) id;
230 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
231 do {
232 debug_only(NoSafepointVerifier nosafepoint;)
233 // Could use a non-blocking query for identity_hash here...
234 if ((k->identity_hash() & klass_mask) == klass_hash)
235 return true;
236 k = k->super();
237 } while (k != NULL);
238 return false;
239 }
240
241 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
242 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
243 uintptr_t as_uint = (uintptr_t) id;
244 intptr_t offset = raw_instance_offset(id);
245 if (VerifyJNIFields) {
246 if (is_checked_jfieldID(id)) {
247 guarantee(klass_hash_ok(k, id),
248 "Bug in native code: jfieldID class must match object");
249 } else {
250 #if 0
251 #ifndef PRODUCT
252 if (Verbose) {
253 ResourceMark rm;
254 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
255 }
256 #endif
257 #endif
258 }
259 }
260 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
261 "Bug in native code: jfieldID offset must address interior of object");
262 }
263
264 // Wrapper to trace JNI functions
265
266 #ifdef ASSERT
267 Histogram* JNIHistogram;
268 static volatile int JNIHistogram_lock = 0;
269
270 class JNIHistogramElement : public HistogramElement {
271 public:
272 JNIHistogramElement(const char* name);
273 };
274
275 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
276 _name = elementName;
277 uintx count = 0;
278
279 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
280 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
281 count +=1;
282 if ( (WarnOnStalledSpinLock > 0)
283 && (count % WarnOnStalledSpinLock == 0)) {
284 warning("JNIHistogram_lock seems to be stalled");
285 }
286 }
287 }
288
289
290 if(JNIHistogram == NULL)
291 JNIHistogram = new Histogram("JNI Call Counts",100);
292
293 JNIHistogram->add_element(this);
294 Atomic::dec(&JNIHistogram_lock);
295 }
296
297 #define JNICountWrapper(arg) \
298 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
299 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
300 if (e != NULL) e->increment_count()
301 #define JNIWrapper(arg) JNICountWrapper(arg);
302 #else
303 #define JNIWrapper(arg)
304 #endif
305
306
307 // Implementation of JNI entries
308
309 DT_RETURN_MARK_DECL(DefineClass, jclass
310 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
311
312 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
313 const jbyte *buf, jsize bufLen))
314 JNIWrapper("DefineClass");
315
316 HOTSPOT_JNI_DEFINECLASS_ENTRY(
317 env, (char*) name, loaderRef, (char*) buf, bufLen);
318
319 jclass cls = NULL;
320 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
321
322 TempNewSymbol class_name = NULL;
323 // Since exceptions can be thrown, class initialization can take place
324 // if name is NULL no check for class name in .class stream has to be made.
325 if (name != NULL) {
326 const int str_len = (int)strlen(name);
327 if (str_len > Symbol::max_length()) {
328 // It's impossible to create this class; the name cannot fit
329 // into the constant pool.
330 Exceptions::fthrow(THREAD_AND_LOCATION,
331 vmSymbols::java_lang_NoClassDefFoundError(),
332 "Class name exceeds maximum length of %d: %s",
333 Symbol::max_length(),
334 name);
335 return 0;
336 }
337 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
338 }
339 ResourceMark rm(THREAD);
340 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
341 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
342
343 if (UsePerfData && !class_loader.is_null()) {
344 // check whether the current caller thread holds the lock or not.
345 // If not, increment the corresponding counter
346 if (ObjectSynchronizer::
347 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
348 ObjectSynchronizer::owner_self) {
349 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
350 }
351 }
352 Klass* k = SystemDictionary::resolve_from_stream(class_name,
353 class_loader,
354 Handle(),
355 &st,
356 CHECK_NULL);
357
358 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
359 trace_class_resolution(k);
360 }
361
362 cls = (jclass)JNIHandles::make_local(
363 env, k->java_mirror());
364 return cls;
365 JNI_END
366
367
368
369 static bool first_time_FindClass = true;
370
371 DT_RETURN_MARK_DECL(FindClass, jclass
372 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
373
374 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
375 JNIWrapper("FindClass");
376
377 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
378
379 jclass result = NULL;
380 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
381
382 // Remember if we are the first invocation of jni_FindClass
383 bool first_time = first_time_FindClass;
384 first_time_FindClass = false;
385
386 // Sanity check the name: it cannot be null or larger than the maximum size
387 // name we can fit in the constant pool.
388 if (name == NULL) {
389 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
390 }
391 if ((int)strlen(name) > Symbol::max_length()) {
392 Exceptions::fthrow(THREAD_AND_LOCATION,
393 vmSymbols::java_lang_NoClassDefFoundError(),
394 "Class name exceeds maximum length of %d: %s",
395 Symbol::max_length(),
396 name);
397 return 0;
398 }
399
400 //%note jni_3
401 Handle protection_domain;
402 // Find calling class
403 Klass* k = thread->security_get_caller_class(0);
404 // default to the system loader when no context
405 Handle loader(THREAD, SystemDictionary::java_system_loader());
406 if (k != NULL) {
407 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
408 // in the correct class context.
409 if (k->class_loader() == NULL &&
410 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
411 JavaValue result(T_OBJECT);
412 JavaCalls::call_static(&result, k,
413 vmSymbols::getFromClass_name(),
414 vmSymbols::void_class_signature(),
415 CHECK_NULL);
416 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
417 // a non-NULL Class object. When invoked from JNI_OnUnload,
418 // it will return NULL to indicate no context.
419 oop mirror = (oop) result.get_jobject();
420 if (mirror != NULL) {
421 Klass* fromClass = java_lang_Class::as_Klass(mirror);
422 loader = Handle(THREAD, fromClass->class_loader());
423 protection_domain = Handle(THREAD, fromClass->protection_domain());
424 }
425 } else {
426 loader = Handle(THREAD, k->class_loader());
427 }
428 }
429
430 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
431 result = find_class_from_class_loader(env, sym, true, loader,
432 protection_domain, true, thread);
433
434 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
435 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
436 }
437
438 // If we were the first invocation of jni_FindClass, we enable compilation again
439 // rather than just allowing invocation counter to overflow and decay.
440 // Controlled by flag DelayCompilationDuringStartup.
441 if (first_time && !CompileTheWorld)
442 CompilationPolicy::completed_vm_startup();
443
444 return result;
445 JNI_END
446
447 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
448 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
449
450 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
451 JNIWrapper("FromReflectedMethod");
452
453 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
454
455 jmethodID ret = NULL;
456 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
457
458 // method is a handle to a java.lang.reflect.Method object
459 oop reflected = JNIHandles::resolve_non_null(method);
460 oop mirror = NULL;
461 int slot = 0;
462
463 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
464 mirror = java_lang_reflect_Constructor::clazz(reflected);
465 slot = java_lang_reflect_Constructor::slot(reflected);
466 } else {
467 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
468 mirror = java_lang_reflect_Method::clazz(reflected);
469 slot = java_lang_reflect_Method::slot(reflected);
470 }
471 Klass* k1 = java_lang_Class::as_Klass(mirror);
472
473 // Make sure class is initialized before handing id's out to methods
474 k1->initialize(CHECK_NULL);
475 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
476 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
477 return ret;
478 JNI_END
479
480 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
481 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
482
483 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
484 JNIWrapper("FromReflectedField");
485
486 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
487
488 jfieldID ret = NULL;
489 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
490
491 // field is a handle to a java.lang.reflect.Field object
492 oop reflected = JNIHandles::resolve_non_null(field);
493 oop mirror = java_lang_reflect_Field::clazz(reflected);
494 Klass* k1 = java_lang_Class::as_Klass(mirror);
495 int slot = java_lang_reflect_Field::slot(reflected);
496 int modifiers = java_lang_reflect_Field::modifiers(reflected);
497
498 // Make sure class is initialized before handing id's out to fields
499 k1->initialize(CHECK_NULL);
500
501 // First check if this is a static field
502 if (modifiers & JVM_ACC_STATIC) {
503 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
504 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
505 assert(id != NULL, "corrupt Field object");
506 debug_only(id->set_is_static_field_id();)
507 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
508 ret = jfieldIDWorkaround::to_static_jfieldID(id);
509 return ret;
510 }
511
512 // The slot is the index of the field description in the field-array
513 // The jfieldID is the offset of the field within the object
514 // It may also have hash bits for k, if VerifyJNIFields is turned on.
515 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
516 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
517 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
518 return ret;
519 JNI_END
520
521
522 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
523 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
524
525 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
526 JNIWrapper("ToReflectedMethod");
527
528 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
529
530 jobject ret = NULL;
531 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
532
533 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
534 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
535 oop reflection_method;
536 if (m->is_initializer()) {
537 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
538 } else {
539 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
540 }
541 ret = JNIHandles::make_local(env, reflection_method);
542 return ret;
543 JNI_END
544
545 DT_RETURN_MARK_DECL(GetSuperclass, jclass
546 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
547
548 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
549 JNIWrapper("GetSuperclass");
550
551 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
552
553 jclass obj = NULL;
554 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
555
556 oop mirror = JNIHandles::resolve_non_null(sub);
557 // primitive classes return NULL
558 if (java_lang_Class::is_primitive(mirror)) return NULL;
559
560 // Rules of Class.getSuperClass as implemented by KLass::java_super:
561 // arrays return Object
562 // interfaces return NULL
563 // proper classes return Klass::super()
564 Klass* k = java_lang_Class::as_Klass(mirror);
565 if (k->is_interface()) return NULL;
566
567 // return mirror for superclass
568 Klass* super = k->java_super();
569 // super2 is the value computed by the compiler's getSuperClass intrinsic:
570 debug_only(Klass* super2 = ( k->is_array_klass()
571 ? SystemDictionary::Object_klass()
572 : k->super() ) );
573 assert(super == super2,
574 "java_super computation depends on interface, array, other super");
575 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
576 return obj;
577 JNI_END
578
579 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
580 JNIWrapper("IsSubclassOf");
581
582 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
583
584 oop sub_mirror = JNIHandles::resolve_non_null(sub);
585 oop super_mirror = JNIHandles::resolve_non_null(super);
586 if (java_lang_Class::is_primitive(sub_mirror) ||
587 java_lang_Class::is_primitive(super_mirror)) {
588 jboolean ret = oopDesc::equals(sub_mirror, super_mirror);
589
590 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
591 return ret;
592 }
593 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
594 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
595 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
596 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
597 JNI_TRUE : JNI_FALSE;
598
599 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
600 return ret;
601 JNI_END
602
603
604 DT_RETURN_MARK_DECL(Throw, jint
605 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
606
607 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
608 JNIWrapper("Throw");
609
610 HOTSPOT_JNI_THROW_ENTRY(env, obj);
611
612 jint ret = JNI_OK;
613 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
614
615 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
616 ShouldNotReachHere();
617 return 0; // Mute compiler.
618 JNI_END
619
620
621 DT_RETURN_MARK_DECL(ThrowNew, jint
622 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
623
624 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
625 JNIWrapper("ThrowNew");
626
627 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
628
629 jint ret = JNI_OK;
630 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
631
632 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
633 Symbol* name = k->name();
634 Handle class_loader (THREAD, k->class_loader());
635 Handle protection_domain (THREAD, k->protection_domain());
636 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
637 ShouldNotReachHere();
638 return 0; // Mute compiler.
639 JNI_END
640
641
642 // JNI functions only transform a pending async exception to a synchronous
643 // exception in ExceptionOccurred and ExceptionCheck calls, since
644 // delivering an async exception in other places won't change the native
645 // code's control flow and would be harmful when native code further calls
646 // JNI functions with a pending exception. Async exception is also checked
647 // during the call, so ExceptionOccurred/ExceptionCheck won't return
648 // false but deliver the async exception at the very end during
649 // state transition.
650
651 static void jni_check_async_exceptions(JavaThread *thread) {
652 assert(thread == Thread::current(), "must be itself");
653 thread->check_and_handle_async_exceptions();
654 }
655
656 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
657 JNIWrapper("ExceptionOccurred");
658
659 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
660
661 jni_check_async_exceptions(thread);
662 oop exception = thread->pending_exception();
663 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
664
665 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
666 return ret;
667 JNI_END
668
669
670 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
671 JNIWrapper("ExceptionDescribe");
672
673 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
674
675 if (thread->has_pending_exception()) {
676 Handle ex(thread, thread->pending_exception());
677 thread->clear_pending_exception();
678 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
679 // Don't print anything if we are being killed.
680 } else {
681 jio_fprintf(defaultStream::error_stream(), "Exception ");
682 if (thread != NULL && thread->threadObj() != NULL) {
683 ResourceMark rm(THREAD);
684 jio_fprintf(defaultStream::error_stream(),
685 "in thread \"%s\" ", thread->get_thread_name());
686 }
687 if (ex->is_a(SystemDictionary::Throwable_klass())) {
688 JavaValue result(T_VOID);
689 JavaCalls::call_virtual(&result,
690 ex,
691 SystemDictionary::Throwable_klass(),
692 vmSymbols::printStackTrace_name(),
693 vmSymbols::void_method_signature(),
694 THREAD);
695 // If an exception is thrown in the call it gets thrown away. Not much
696 // we can do with it. The native code that calls this, does not check
697 // for the exception - hence, it might still be in the thread when DestroyVM gets
698 // called, potentially causing a few asserts to trigger - since no pending exception
699 // is expected.
700 CLEAR_PENDING_EXCEPTION;
701 } else {
702 ResourceMark rm(THREAD);
703 jio_fprintf(defaultStream::error_stream(),
704 ". Uncaught exception of type %s.",
705 ex->klass()->external_name());
706 }
707 }
708 }
709
710 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
711 JNI_END
712
713
714 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
715 JNIWrapper("ExceptionClear");
716
717 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
718
719 // The jni code might be using this API to clear java thrown exception.
720 // So just mark jvmti thread exception state as exception caught.
721 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
722 if (state != NULL && state->is_exception_detected()) {
723 state->set_exception_caught();
724 }
725 thread->clear_pending_exception();
726
727 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
728 JNI_END
729
730
731 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
732 JNIWrapper("FatalError");
733
734 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
735
736 tty->print_cr("FATAL ERROR in native method: %s", msg);
737 thread->print_stack();
738 os::abort(); // Dump core and abort
739 JNI_END
740
741
742 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
743 JNIWrapper("PushLocalFrame");
744
745 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
746
747 //%note jni_11
748 if (capacity < 0 ||
749 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
750 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
751 return JNI_ERR;
752 }
753 JNIHandleBlock* old_handles = thread->active_handles();
754 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
755 assert(new_handles != NULL, "should not be NULL");
756 new_handles->set_pop_frame_link(old_handles);
757 thread->set_active_handles(new_handles);
758 jint ret = JNI_OK;
759 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
760 return ret;
761 JNI_END
762
763
764 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
765 JNIWrapper("PopLocalFrame");
766
767 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
768
769 //%note jni_11
770 Handle result_handle(thread, JNIHandles::resolve(result));
771 JNIHandleBlock* old_handles = thread->active_handles();
772 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
773 if (new_handles != NULL) {
774 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
775 // This way code will still work if PopLocalFrame is called without a corresponding
776 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
777 // the release_block call will release the blocks.
778 thread->set_active_handles(new_handles);
779 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
780 JNIHandleBlock::release_block(old_handles, thread); // may block
781 result = JNIHandles::make_local(thread, result_handle());
782 }
783 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
784 return result;
785 JNI_END
786
787
788 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
789 JNIWrapper("NewGlobalRef");
790
791 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
792
793 Handle ref_handle(thread, JNIHandles::resolve(ref));
794 jobject ret = JNIHandles::make_global(ref_handle);
795
796 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
797 return ret;
798 JNI_END
799
800 // Must be JNI_ENTRY (with HandleMark)
801 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
802 JNIWrapper("DeleteGlobalRef");
803
804 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
805
806 JNIHandles::destroy_global(ref);
807
808 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
809 JNI_END
810
811 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
812 JNIWrapper("DeleteLocalRef");
813
814 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
815
816 JNIHandles::destroy_local(obj);
817
818 HOTSPOT_JNI_DELETELOCALREF_RETURN();
819 JNI_END
820
821 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
822 JNIWrapper("IsSameObject");
823
824 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
825
826 oop a = JNIHandles::resolve(r1);
827 oop b = JNIHandles::resolve(r2);
828 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE;
829
830 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
831 return ret;
832 JNI_END
833
834
835 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
836 JNIWrapper("NewLocalRef");
837
838 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
839
840 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
841
842 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
843 return ret;
844 JNI_END
845
846 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
847 JNIWrapper("EnsureLocalCapacity");
848
849 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
850
851 jint ret;
852 if (capacity >= 0 &&
853 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
854 ret = JNI_OK;
855 } else {
856 ret = JNI_ERR;
857 }
858
859 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
860 return ret;
861 JNI_END
862
863 // Return the Handle Type
864 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
865 JNIWrapper("GetObjectRefType");
866
867 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
868
869 jobjectRefType ret = JNIInvalidRefType;
870 if (obj != NULL) {
871 ret = JNIHandles::handle_type(thread, obj);
872 }
873
874 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
875 return ret;
876 JNI_END
877
878
879 class JNI_ArgumentPusher : public SignatureIterator {
880 protected:
881 JavaCallArguments* _arguments;
882
883 virtual void get_bool () = 0;
884 virtual void get_char () = 0;
885 virtual void get_short () = 0;
886 virtual void get_byte () = 0;
887 virtual void get_int () = 0;
888 virtual void get_long () = 0;
889 virtual void get_float () = 0;
890 virtual void get_double () = 0;
891 virtual void get_object () = 0;
892
893 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
894 this->_return_type = T_ILLEGAL;
895 _arguments = NULL;
896 }
897
898 public:
899 virtual void iterate( uint64_t fingerprint ) = 0;
900
901 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
902
903 inline void do_bool() { if (!is_return_type()) get_bool(); }
904 inline void do_char() { if (!is_return_type()) get_char(); }
905 inline void do_short() { if (!is_return_type()) get_short(); }
906 inline void do_byte() { if (!is_return_type()) get_byte(); }
907 inline void do_int() { if (!is_return_type()) get_int(); }
908 inline void do_long() { if (!is_return_type()) get_long(); }
909 inline void do_float() { if (!is_return_type()) get_float(); }
910 inline void do_double() { if (!is_return_type()) get_double(); }
911 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
912 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
913 inline void do_void() { }
914
915 JavaCallArguments* arguments() { return _arguments; }
916 void push_receiver(Handle h) { _arguments->push_oop(h); }
917 };
918
919
920 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
921 protected:
922 va_list _ap;
923
924 inline void get_bool() {
925 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
926 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
927 // TemplateInterpreterGenerator::generate_result_handler_for and
928 // SharedRuntime::generate_native_wrapper.
929 jboolean b = va_arg(_ap, jint);
930 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
931 }
932 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
933 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
934 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
935 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
936
937 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
938
939 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
940 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
941 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
942 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
943
944 inline void set_ap(va_list rap) {
945 va_copy(_ap, rap);
946 }
947
948 public:
949 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
950 : JNI_ArgumentPusher(signature) {
951 set_ap(rap);
952 }
953 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
954 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
955 set_ap(rap);
956 }
957
958 // Optimized path if we have the bitvector form of signature
959 void iterate( uint64_t fingerprint ) {
960 if (fingerprint == (uint64_t)CONST64(-1)) {
961 SignatureIterator::iterate(); // Must be too many arguments
962 } else {
963 _return_type = (BasicType)((fingerprint >> static_feature_size) &
964 result_feature_mask);
965
966 assert(fingerprint, "Fingerprint should not be 0");
967 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
968 while ( 1 ) {
969 switch ( fingerprint & parameter_feature_mask ) {
970 case bool_parm:
971 get_bool();
972 break;
973 case char_parm:
974 get_char();
975 break;
976 case short_parm:
977 get_short();
978 break;
979 case byte_parm:
980 get_byte();
981 break;
982 case int_parm:
983 get_int();
984 break;
985 case obj_parm:
986 get_object();
987 break;
988 case long_parm:
989 get_long();
990 break;
991 case float_parm:
992 get_float();
993 break;
994 case double_parm:
995 get_double();
996 break;
997 case done_parm:
998 return;
999 break;
1000 default:
1001 ShouldNotReachHere();
1002 break;
1003 }
1004 fingerprint >>= parameter_feature_size;
1005 }
1006 }
1007 }
1008 };
1009
1010
1011 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1012 protected:
1013 const jvalue *_ap;
1014
1015 inline void get_bool() {
1016 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1017 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1018 // TemplateInterpreterGenerator::generate_result_handler_for and
1019 // SharedRuntime::generate_native_wrapper.
1020 jboolean b = (_ap++)->z;
1021 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1022 }
1023 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1024 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1025 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1026 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1027
1028 inline void get_long() { _arguments->push_long((_ap++)->j); }
1029 inline void get_float() { _arguments->push_float((_ap++)->f); }
1030 inline void get_double() { _arguments->push_double((_ap++)->d);}
1031 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1032
1033 inline void set_ap(const jvalue *rap) { _ap = rap; }
1034
1035 public:
1036 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1037 : JNI_ArgumentPusher(signature) {
1038 set_ap(rap);
1039 }
1040 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1041 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1042 set_ap(rap);
1043 }
1044
1045 // Optimized path if we have the bitvector form of signature
1046 void iterate( uint64_t fingerprint ) {
1047 if (fingerprint == (uint64_t)CONST64(-1)) {
1048 SignatureIterator::iterate(); // Must be too many arguments
1049 } else {
1050 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1051 result_feature_mask);
1052 assert(fingerprint, "Fingerprint should not be 0");
1053 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1054 while ( 1 ) {
1055 switch ( fingerprint & parameter_feature_mask ) {
1056 case bool_parm:
1057 get_bool();
1058 break;
1059 case char_parm:
1060 get_char();
1061 break;
1062 case short_parm:
1063 get_short();
1064 break;
1065 case byte_parm:
1066 get_byte();
1067 break;
1068 case int_parm:
1069 get_int();
1070 break;
1071 case obj_parm:
1072 get_object();
1073 break;
1074 case long_parm:
1075 get_long();
1076 break;
1077 case float_parm:
1078 get_float();
1079 break;
1080 case double_parm:
1081 get_double();
1082 break;
1083 case done_parm:
1084 return;
1085 break;
1086 default:
1087 ShouldNotReachHere();
1088 break;
1089 }
1090 fingerprint >>= parameter_feature_size;
1091 }
1092 }
1093 }
1094 };
1095
1096
1097 enum JNICallType {
1098 JNI_STATIC,
1099 JNI_VIRTUAL,
1100 JNI_NONVIRTUAL
1101 };
1102
1103
1104
1105 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1106 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1107
1108 // Create object to hold arguments for the JavaCall, and associate it with
1109 // the jni parser
1110 ResourceMark rm(THREAD);
1111 int number_of_parameters = method->size_of_parameters();
1112 JavaCallArguments java_args(number_of_parameters);
1113 args->set_java_argument_object(&java_args);
1114
1115 assert(method->is_static(), "method should be static");
1116
1117 // Fill out JavaCallArguments object
1118 args->iterate( Fingerprinter(method).fingerprint() );
1119 // Initialize result type
1120 result->set_type(args->get_ret_type());
1121
1122 // Invoke the method. Result is returned as oop.
1123 JavaCalls::call(result, method, &java_args, CHECK);
1124
1125 // Convert result
1126 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1127 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1128 }
1129 }
1130
1131
1132 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1133 oop recv = JNIHandles::resolve(receiver);
1134 if (recv == NULL) {
1135 THROW(vmSymbols::java_lang_NullPointerException());
1136 }
1137 Handle h_recv(THREAD, recv);
1138
1139 int number_of_parameters;
1140 Method* selected_method;
1141 {
1142 Method* m = Method::resolve_jmethod_id(method_id);
1143 number_of_parameters = m->size_of_parameters();
1144 Klass* holder = m->method_holder();
1145 if (call_type != JNI_VIRTUAL) {
1146 selected_method = m;
1147 } else if (!m->has_itable_index()) {
1148 // non-interface call -- for that little speed boost, don't handlize
1149 debug_only(NoSafepointVerifier nosafepoint;)
1150 // jni_GetMethodID makes sure class is linked and initialized
1151 // so m should have a valid vtable index.
1152 assert(m->valid_vtable_index(), "no valid vtable index");
1153 int vtbl_index = m->vtable_index();
1154 if (vtbl_index != Method::nonvirtual_vtable_index) {
1155 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1156 } else {
1157 // final method
1158 selected_method = m;
1159 }
1160 } else {
1161 // interface call
1162 int itbl_index = m->itable_index();
1163 Klass* k = h_recv->klass();
1164 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1165 }
1166 }
1167
1168 methodHandle method(THREAD, selected_method);
1169
1170 // Create object to hold arguments for the JavaCall, and associate it with
1171 // the jni parser
1172 ResourceMark rm(THREAD);
1173 JavaCallArguments java_args(number_of_parameters);
1174 args->set_java_argument_object(&java_args);
1175
1176 // handle arguments
1177 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1178 args->push_receiver(h_recv); // Push jobject handle
1179
1180 // Fill out JavaCallArguments object
1181 args->iterate( Fingerprinter(method).fingerprint() );
1182 // Initialize result type
1183 result->set_type(args->get_ret_type());
1184
1185 // Invoke the method. Result is returned as oop.
1186 JavaCalls::call(result, method, &java_args, CHECK);
1187
1188 // Convert result
1189 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1190 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1191 }
1192 }
1193
1194
1195 static instanceOop alloc_object(jclass clazz, TRAPS) {
1196 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1197 if (k == NULL) {
1198 ResourceMark rm(THREAD);
1199 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1200 }
1201 k->check_valid_for_instantiation(false, CHECK_NULL);
1202 k->initialize(CHECK_NULL);
1203 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1204 return ih;
1205 }
1206
1207 DT_RETURN_MARK_DECL(AllocObject, jobject
1208 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1209
1210 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1211 JNIWrapper("AllocObject");
1212
1213 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1214
1215 jobject ret = NULL;
1216 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1217
1218 instanceOop i = alloc_object(clazz, CHECK_NULL);
1219 ret = JNIHandles::make_local(env, i);
1220 return ret;
1221 JNI_END
1222
1223 DT_RETURN_MARK_DECL(NewObjectA, jobject
1224 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1225
1226 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1227 JNIWrapper("NewObjectA");
1228
1229 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1230
1231 jobject obj = NULL;
1232 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1233
1234 instanceOop i = alloc_object(clazz, CHECK_NULL);
1235 obj = JNIHandles::make_local(env, i);
1236 JavaValue jvalue(T_VOID);
1237 JNI_ArgumentPusherArray ap(methodID, args);
1238 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1239 return obj;
1240 JNI_END
1241
1242
1243 DT_RETURN_MARK_DECL(NewObjectV, jobject
1244 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1245
1246 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1247 JNIWrapper("NewObjectV");
1248
1249 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1250
1251 jobject obj = NULL;
1252 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1253
1254 instanceOop i = alloc_object(clazz, CHECK_NULL);
1255 obj = JNIHandles::make_local(env, i);
1256 JavaValue jvalue(T_VOID);
1257 JNI_ArgumentPusherVaArg ap(methodID, args);
1258 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1259 return obj;
1260 JNI_END
1261
1262
1263 DT_RETURN_MARK_DECL(NewObject, jobject
1264 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1265
1266 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1267 JNIWrapper("NewObject");
1268
1269 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1270
1271 jobject obj = NULL;
1272 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1273
1274 instanceOop i = alloc_object(clazz, CHECK_NULL);
1275 obj = JNIHandles::make_local(env, i);
1276 va_list args;
1277 va_start(args, methodID);
1278 JavaValue jvalue(T_VOID);
1279 JNI_ArgumentPusherVaArg ap(methodID, args);
1280 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1281 va_end(args);
1282 return obj;
1283 JNI_END
1284
1285
1286 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1287 JNIWrapper("GetObjectClass");
1288
1289 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1290
1291 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1292 jclass ret =
1293 (jclass) JNIHandles::make_local(env, k->java_mirror());
1294
1295 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1296 return ret;
1297 JNI_END
1298
1299 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1300 JNIWrapper("IsInstanceOf");
1301
1302 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1303
1304 jboolean ret = JNI_TRUE;
1305 if (obj != NULL) {
1306 ret = JNI_FALSE;
1307 Klass* k = java_lang_Class::as_Klass(
1308 JNIHandles::resolve_non_null(clazz));
1309 if (k != NULL) {
1310 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1311 }
1312 }
1313
1314 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1315 return ret;
1316 JNI_END
1317
1318
1319 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1320 const char *sig, bool is_static, TRAPS) {
1321 // %%%% This code should probably just call into a method in the LinkResolver
1322 //
1323 // The class should have been loaded (we have an instance of the class
1324 // passed in) so the method and signature should already be in the symbol
1325 // table. If they're not there, the method doesn't exist.
1326 const char *name_to_probe = (name_str == NULL)
1327 ? vmSymbols::object_initializer_name()->as_C_string()
1328 : name_str;
1329 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1330 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1331
1332 if (name == NULL || signature == NULL) {
1333 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1334 }
1335
1336 // Throw a NoSuchMethodError exception if we have an instance of a
1337 // primitive java.lang.Class
1338 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1339 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1340 }
1341
1342 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1343
1344 // Make sure class is linked and initialized before handing id's out to
1345 // Method*s.
1346 klass->initialize(CHECK_NULL);
1347
1348 Method* m;
1349 if (name == vmSymbols::object_initializer_name() ||
1350 name == vmSymbols::class_initializer_name()) {
1351 // Never search superclasses for constructors
1352 if (klass->is_instance_klass()) {
1353 m = InstanceKlass::cast(klass)->find_method(name, signature);
1354 } else {
1355 m = NULL;
1356 }
1357 } else {
1358 m = klass->lookup_method(name, signature);
1359 if (m == NULL && klass->is_instance_klass()) {
1360 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1361 }
1362 }
1363 if (m == NULL || (m->is_static() != is_static)) {
1364 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1365 }
1366 return m->jmethod_id();
1367 }
1368
1369
1370 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1371 const char *name, const char *sig))
1372 JNIWrapper("GetMethodID");
1373 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1374 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1375 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1376 return ret;
1377 JNI_END
1378
1379
1380 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1381 const char *name, const char *sig))
1382 JNIWrapper("GetStaticMethodID");
1383 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1384 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1385 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1386 return ret;
1387 JNI_END
1388
1389
1390
1391 //
1392 // Calling Methods
1393 //
1394
1395
1396 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1397 , EntryProbe, ReturnProbe) \
1398 \
1399 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1400 , ReturnProbe); \
1401 \
1402 JNI_ENTRY(ResultType, \
1403 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1404 JNIWrapper("Call" XSTR(Result) "Method"); \
1405 \
1406 EntryProbe; \
1407 ResultType ret = 0;\
1408 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1409 (const ResultType&)ret);\
1410 \
1411 va_list args; \
1412 va_start(args, methodID); \
1413 JavaValue jvalue(Tag); \
1414 JNI_ArgumentPusherVaArg ap(methodID, args); \
1415 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1416 va_end(args); \
1417 ret = jvalue.get_##ResultType(); \
1418 return ret;\
1419 JNI_END
1420
1421 // the runtime type of subword integral basic types is integer
1422 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1423 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1426 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1429 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1431 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1432 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1434
1435 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1436 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jint, Int, T_INT,
1439 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1441 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1442 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1444 // Float and double probes don't return value because dtrace doesn't currently support it
1445 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1446 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1448 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1449 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1450 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1451
1452 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1453 , EntryProbe, ReturnProbe) \
1454 \
1455 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1456 , ReturnProbe); \
1457 \
1458 JNI_ENTRY(ResultType, \
1459 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1460 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1461 \
1462 EntryProbe;\
1463 ResultType ret = 0;\
1464 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1465 (const ResultType&)ret);\
1466 \
1467 JavaValue jvalue(Tag); \
1468 JNI_ArgumentPusherVaArg ap(methodID, args); \
1469 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1470 ret = jvalue.get_##ResultType(); \
1471 return ret;\
1472 JNI_END
1473
1474 // the runtime type of subword integral basic types is integer
1475 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1476 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1479 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1482 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1484 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1485 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1487
1488 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1489 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jint, Int, T_INT,
1492 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1494 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1495 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1497 // Float and double probes don't return value because dtrace doesn't currently support it
1498 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1499 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1501 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1502 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1503 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1504
1505 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1506 , EntryProbe, ReturnProbe) \
1507 \
1508 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1509 , ReturnProbe); \
1510 \
1511 JNI_ENTRY(ResultType, \
1512 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1513 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1514 EntryProbe; \
1515 ResultType ret = 0;\
1516 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1517 (const ResultType&)ret);\
1518 \
1519 JavaValue jvalue(Tag); \
1520 JNI_ArgumentPusherArray ap(methodID, args); \
1521 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1522 ret = jvalue.get_##ResultType(); \
1523 return ret;\
1524 JNI_END
1525
1526 // the runtime type of subword integral basic types is integer
1527 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1528 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1531 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1534 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1536 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1537 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1539
1540 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1541 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jint, Int, T_INT,
1544 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1546 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1547 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1549 // Float and double probes don't return value because dtrace doesn't currently support it
1550 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1551 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1553 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1554 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1555 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1556
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1560
1561
1562 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1563 JNIWrapper("CallVoidMethod");
1564 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1565 DT_VOID_RETURN_MARK(CallVoidMethod);
1566
1567 va_list args;
1568 va_start(args, methodID);
1569 JavaValue jvalue(T_VOID);
1570 JNI_ArgumentPusherVaArg ap(methodID, args);
1571 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1572 va_end(args);
1573 JNI_END
1574
1575
1576 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1577 JNIWrapper("CallVoidMethodV");
1578 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1579 DT_VOID_RETURN_MARK(CallVoidMethodV);
1580
1581 JavaValue jvalue(T_VOID);
1582 JNI_ArgumentPusherVaArg ap(methodID, args);
1583 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1584 JNI_END
1585
1586
1587 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1588 JNIWrapper("CallVoidMethodA");
1589 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1590 DT_VOID_RETURN_MARK(CallVoidMethodA);
1591
1592 JavaValue jvalue(T_VOID);
1593 JNI_ArgumentPusherArray ap(methodID, args);
1594 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1595 JNI_END
1596
1597
1598
1599 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1600 , EntryProbe, ReturnProbe) \
1601 \
1602 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1603 , ReturnProbe);\
1604 \
1605 JNI_ENTRY(ResultType, \
1606 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1607 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1608 \
1609 EntryProbe;\
1610 ResultType ret;\
1611 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1612 (const ResultType&)ret);\
1613 \
1614 va_list args; \
1615 va_start(args, methodID); \
1616 JavaValue jvalue(Tag); \
1617 JNI_ArgumentPusherVaArg ap(methodID, args); \
1618 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1619 va_end(args); \
1620 ret = jvalue.get_##ResultType(); \
1621 return ret;\
1622 JNI_END
1623
1624 // the runtime type of subword integral basic types is integer
1625 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1626 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1629 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1632 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1634 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1635 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1637
1638 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1639 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1642 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1644 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1645 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1646 // Float and double probes don't return value because dtrace doesn't currently support it
1647 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1648 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1649 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1651 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1652 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1653 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1654
1655 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1656 , EntryProbe, ReturnProbe) \
1657 \
1658 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1659 , ReturnProbe);\
1660 \
1661 JNI_ENTRY(ResultType, \
1662 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1663 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1664 \
1665 EntryProbe;\
1666 ResultType ret;\
1667 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1668 (const ResultType&)ret);\
1669 \
1670 JavaValue jvalue(Tag); \
1671 JNI_ArgumentPusherVaArg ap(methodID, args); \
1672 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1673 ret = jvalue.get_##ResultType(); \
1674 return ret;\
1675 JNI_END
1676
1677 // the runtime type of subword integral basic types is integer
1678 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1679 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1682 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1685 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1687 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1688 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1690
1691 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1692 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1695 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1697 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1698 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1699 // Float and double probes don't return value because dtrace doesn't currently support it
1700 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1701 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1702 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1704 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1705 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1706 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1707
1708 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1709 , EntryProbe, ReturnProbe) \
1710 \
1711 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1712 , ReturnProbe);\
1713 \
1714 JNI_ENTRY(ResultType, \
1715 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1716 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1717 \
1718 EntryProbe;\
1719 ResultType ret;\
1720 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1721 (const ResultType&)ret);\
1722 \
1723 JavaValue jvalue(Tag); \
1724 JNI_ArgumentPusherArray ap(methodID, args); \
1725 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1726 ret = jvalue.get_##ResultType(); \
1727 return ret;\
1728 JNI_END
1729
1730 // the runtime type of subword integral basic types is integer
1731 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1732 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1735 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1738 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1740 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1741 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1743
1744 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1745 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1748 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1750 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1751 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1752 // Float and double probes don't return value because dtrace doesn't currently support it
1753 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1754 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1755 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1757 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1758 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1759 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1760
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1764 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1766 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1767
1768 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1769 JNIWrapper("CallNonvirtualVoidMethod");
1770
1771 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1772 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1773
1774 va_list args;
1775 va_start(args, methodID);
1776 JavaValue jvalue(T_VOID);
1777 JNI_ArgumentPusherVaArg ap(methodID, args);
1778 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1779 va_end(args);
1780 JNI_END
1781
1782
1783 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1784 JNIWrapper("CallNonvirtualVoidMethodV");
1785
1786 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1787 env, obj, cls, (uintptr_t) methodID);
1788 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1789
1790 JavaValue jvalue(T_VOID);
1791 JNI_ArgumentPusherVaArg ap(methodID, args);
1792 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1793 JNI_END
1794
1795
1796 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1797 JNIWrapper("CallNonvirtualVoidMethodA");
1798 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1799 env, obj, cls, (uintptr_t) methodID);
1800 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1801 JavaValue jvalue(T_VOID);
1802 JNI_ArgumentPusherArray ap(methodID, args);
1803 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1804 JNI_END
1805
1806
1807
1808 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1809 , EntryProbe, ResultProbe) \
1810 \
1811 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1812 , ResultProbe); \
1813 \
1814 JNI_ENTRY(ResultType, \
1815 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1816 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1817 \
1818 EntryProbe; \
1819 ResultType ret = 0;\
1820 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1821 (const ResultType&)ret);\
1822 \
1823 va_list args; \
1824 va_start(args, methodID); \
1825 JavaValue jvalue(Tag); \
1826 JNI_ArgumentPusherVaArg ap(methodID, args); \
1827 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1828 va_end(args); \
1829 ret = jvalue.get_##ResultType(); \
1830 return ret;\
1831 JNI_END
1832
1833 // the runtime type of subword integral basic types is integer
1834 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1835 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1838 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1841 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1843 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1844 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1846
1847 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1848 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1851 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1853 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1854 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1855 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1856 // Float and double probes don't return value because dtrace doesn't currently support it
1857 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1858 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1860 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1861 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1862 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1863
1864 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1865 , EntryProbe, ResultProbe) \
1866 \
1867 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1868 , ResultProbe); \
1869 \
1870 JNI_ENTRY(ResultType, \
1871 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1872 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1873 \
1874 EntryProbe; \
1875 ResultType ret = 0;\
1876 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1877 (const ResultType&)ret);\
1878 \
1879 JavaValue jvalue(Tag); \
1880 JNI_ArgumentPusherVaArg ap(methodID, args); \
1881 /* Make sure class is initialized before trying to invoke its method */ \
1882 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1883 k->initialize(CHECK_0); \
1884 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1885 va_end(args); \
1886 ret = jvalue.get_##ResultType(); \
1887 return ret;\
1888 JNI_END
1889
1890 // the runtime type of subword integral basic types is integer
1891 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1892 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1895 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1898 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1900 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1901 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1903
1904 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1905 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1908 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1910 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1911 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1912 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1913 // Float and double probes don't return value because dtrace doesn't currently support it
1914 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1915 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1917 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1918 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1919 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1920
1921 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1922 , EntryProbe, ResultProbe) \
1923 \
1924 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1925 , ResultProbe); \
1926 \
1927 JNI_ENTRY(ResultType, \
1928 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1929 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1930 \
1931 EntryProbe; \
1932 ResultType ret = 0;\
1933 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1934 (const ResultType&)ret);\
1935 \
1936 JavaValue jvalue(Tag); \
1937 JNI_ArgumentPusherArray ap(methodID, args); \
1938 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1939 ret = jvalue.get_##ResultType(); \
1940 return ret;\
1941 JNI_END
1942
1943 // the runtime type of subword integral basic types is integer
1944 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1945 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1948 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1951 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1953 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1954 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1956
1957 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1958 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1961 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1963 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1964 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1965 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1966 // Float and double probes don't return value because dtrace doesn't currently support it
1967 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1968 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1970 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1971 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1972 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1973
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1977 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1979 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1980
1981 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1982 JNIWrapper("CallStaticVoidMethod");
1983 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1984 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1985
1986 va_list args;
1987 va_start(args, methodID);
1988 JavaValue jvalue(T_VOID);
1989 JNI_ArgumentPusherVaArg ap(methodID, args);
1990 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1991 va_end(args);
1992 JNI_END
1993
1994
1995 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1996 JNIWrapper("CallStaticVoidMethodV");
1997 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1998 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1999
2000 JavaValue jvalue(T_VOID);
2001 JNI_ArgumentPusherVaArg ap(methodID, args);
2002 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2003 JNI_END
2004
2005
2006 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2007 JNIWrapper("CallStaticVoidMethodA");
2008 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2009 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2010
2011 JavaValue jvalue(T_VOID);
2012 JNI_ArgumentPusherArray ap(methodID, args);
2013 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2014 JNI_END
2015
2016
2017 //
2018 // Accessing Fields
2019 //
2020
2021
2022 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2023 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2024
2025 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2026 const char *name, const char *sig))
2027 JNIWrapper("GetFieldID");
2028 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2029 jfieldID ret = 0;
2030 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2031
2032 // The class should have been loaded (we have an instance of the class
2033 // passed in) so the field and signature should already be in the symbol
2034 // table. If they're not there, the field doesn't exist.
2035 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2036 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2037 if (fieldname == NULL || signame == NULL) {
2038 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2039 }
2040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2041 // Make sure class is initialized before handing id's out to fields
2042 k->initialize(CHECK_NULL);
2043
2044 fieldDescriptor fd;
2045 if (!k->is_instance_klass() ||
2046 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2047 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2048 }
2049
2050 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2051 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2052 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2053 return ret;
2054 JNI_END
2055
2056
2057 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2058 JNIWrapper("GetObjectField");
2059 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2060 oop o = JNIHandles::resolve_non_null(obj);
2061 Klass* k = o->klass();
2062 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2063 // Keep JVMTI addition small and only check enabled flag here.
2064 // jni_GetField_probe() assumes that is okay to create handles.
2065 if (JvmtiExport::should_post_field_access()) {
2066 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2067 }
2068 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2069 jobject ret = JNIHandles::make_local(env, loaded_obj);
2070 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2071 return ret;
2072 JNI_END
2073
2074
2075
2076 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2077 , EntryProbe, ReturnProbe) \
2078 \
2079 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2080 , ReturnProbe); \
2081 \
2082 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2083 JNIWrapper("Get" XSTR(Result) "Field"); \
2084 \
2085 EntryProbe; \
2086 Return ret = 0;\
2087 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2088 \
2089 oop o = JNIHandles::resolve_non_null(obj); \
2090 Klass* k = o->klass(); \
2091 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2092 /* Keep JVMTI addition small and only check enabled flag here. */ \
2093 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2094 /* and creates a ResetNoHandleMark. */ \
2095 if (JvmtiExport::should_post_field_access()) { \
2096 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2097 } \
2098 ret = o->Fieldname##_field(offset); \
2099 return ret; \
2100 JNI_END
2101
2102 DEFINE_GETFIELD(jboolean, bool, Boolean
2103 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2104 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2105 DEFINE_GETFIELD(jbyte, byte, Byte
2106 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2107 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2108 DEFINE_GETFIELD(jchar, char, Char
2109 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2110 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2111 DEFINE_GETFIELD(jshort, short, Short
2112 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2113 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2114 DEFINE_GETFIELD(jint, int, Int
2115 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2116 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2117 DEFINE_GETFIELD(jlong, long, Long
2118 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2119 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2120 // Float and double probes don't return value because dtrace doesn't currently support it
2121 DEFINE_GETFIELD(jfloat, float, Float
2122 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2124 DEFINE_GETFIELD(jdouble, double, Double
2125 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2127
2128 address jni_GetBooleanField_addr() {
2129 return (address)jni_GetBooleanField;
2130 }
2131 address jni_GetByteField_addr() {
2132 return (address)jni_GetByteField;
2133 }
2134 address jni_GetCharField_addr() {
2135 return (address)jni_GetCharField;
2136 }
2137 address jni_GetShortField_addr() {
2138 return (address)jni_GetShortField;
2139 }
2140 address jni_GetIntField_addr() {
2141 return (address)jni_GetIntField;
2142 }
2143 address jni_GetLongField_addr() {
2144 return (address)jni_GetLongField;
2145 }
2146 address jni_GetFloatField_addr() {
2147 return (address)jni_GetFloatField;
2148 }
2149 address jni_GetDoubleField_addr() {
2150 return (address)jni_GetDoubleField;
2151 }
2152
2153 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2154 JNIWrapper("SetObjectField");
2155 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2156 oop o = JNIHandles::resolve_non_null(obj);
2157 Klass* k = o->klass();
2158 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2159 // Keep JVMTI addition small and only check enabled flag here.
2160 // jni_SetField_probe_nh() assumes that is not okay to create handles
2161 // and creates a ResetNoHandleMark.
2162 if (JvmtiExport::should_post_field_modification()) {
2163 jvalue field_value;
2164 field_value.l = value;
2165 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2166 }
2167 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2168 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2169 JNI_END
2170
2171
2172 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2173 , EntryProbe, ReturnProbe) \
2174 \
2175 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2176 JNIWrapper("Set" XSTR(Result) "Field"); \
2177 \
2178 EntryProbe; \
2179 \
2180 oop o = JNIHandles::resolve_non_null(obj); \
2181 Klass* k = o->klass(); \
2182 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2183 /* Keep JVMTI addition small and only check enabled flag here. */ \
2184 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2185 /* and creates a ResetNoHandleMark. */ \
2186 if (JvmtiExport::should_post_field_modification()) { \
2187 jvalue field_value; \
2188 field_value.unionType = value; \
2189 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2190 } \
2191 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2192 o->Fieldname##_field_put(offset, value); \
2193 ReturnProbe; \
2194 JNI_END
2195
2196 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2197 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2198 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2199 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2200 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2201 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2202 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2203 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2204 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2205 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2206 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2207 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2208 DEFINE_SETFIELD(jint, int, Int, 'I', i
2209 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2210 HOTSPOT_JNI_SETINTFIELD_RETURN())
2211 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2212 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2213 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2214 // Float and double probes don't return value because dtrace doesn't currently support it
2215 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2216 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2217 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2218 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2219 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2220 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2221
2222 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2223 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2224
2225 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2226 JNIWrapper("ToReflectedField");
2227 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2228 jobject ret = NULL;
2229 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2230
2231 fieldDescriptor fd;
2232 bool found = false;
2233 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2234
2235 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2236
2237 if (isStatic) {
2238 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2239 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2240 assert(id->is_static_field_id(), "invalid static field id");
2241 found = id->find_local_field(&fd);
2242 } else {
2243 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2244 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2245 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2246 }
2247 assert(found, "bad fieldID passed into jni_ToReflectedField");
2248 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2249 ret = JNIHandles::make_local(env, reflected);
2250 return ret;
2251 JNI_END
2252
2253
2254 //
2255 // Accessing Static Fields
2256 //
2257 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2258 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2259
2260 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2261 const char *name, const char *sig))
2262 JNIWrapper("GetStaticFieldID");
2263 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2264 jfieldID ret = NULL;
2265 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2266
2267 // The class should have been loaded (we have an instance of the class
2268 // passed in) so the field and signature should already be in the symbol
2269 // table. If they're not there, the field doesn't exist.
2270 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2271 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2272 if (fieldname == NULL || signame == NULL) {
2273 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2274 }
2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2276 // Make sure class is initialized before handing id's out to static fields
2277 k->initialize(CHECK_NULL);
2278
2279 fieldDescriptor fd;
2280 if (!k->is_instance_klass() ||
2281 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2282 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2283 }
2284
2285 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2286 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2287 debug_only(id->set_is_static_field_id();)
2288
2289 debug_only(id->verify(fd.field_holder()));
2290
2291 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2292 return ret;
2293 JNI_END
2294
2295
2296 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2297 JNIWrapper("GetStaticObjectField");
2298 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2299 #if INCLUDE_JNI_CHECK
2300 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2301 #endif // INCLUDE_JNI_CHECK
2302 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2303 assert(id->is_static_field_id(), "invalid static field id");
2304 // Keep JVMTI addition small and only check enabled flag here.
2305 // jni_GetField_probe() assumes that is okay to create handles.
2306 if (JvmtiExport::should_post_field_access()) {
2307 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2308 }
2309 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2310 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2311 return ret;
2312 JNI_END
2313
2314
2315 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2316 , EntryProbe, ReturnProbe) \
2317 \
2318 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2319 , ReturnProbe); \
2320 \
2321 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2322 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2323 EntryProbe; \
2324 Return ret = 0;\
2325 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2326 (const Return&)ret);\
2327 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2328 assert(id->is_static_field_id(), "invalid static field id"); \
2329 /* Keep JVMTI addition small and only check enabled flag here. */ \
2330 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2331 if (JvmtiExport::should_post_field_access()) { \
2332 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2333 } \
2334 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2335 return ret;\
2336 JNI_END
2337
2338 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2339 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2340 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2341 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2342 DEFINE_GETSTATICFIELD(jchar, char, Char
2343 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2344 DEFINE_GETSTATICFIELD(jshort, short, Short
2345 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2346 DEFINE_GETSTATICFIELD(jint, int, Int
2347 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2348 DEFINE_GETSTATICFIELD(jlong, long, Long
2349 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2350 // Float and double probes don't return value because dtrace doesn't currently support it
2351 DEFINE_GETSTATICFIELD(jfloat, float, Float
2352 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2353 DEFINE_GETSTATICFIELD(jdouble, double, Double
2354 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2355
2356 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2357 JNIWrapper("SetStaticObjectField");
2358 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2359 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2360 assert(id->is_static_field_id(), "invalid static field id");
2361 // Keep JVMTI addition small and only check enabled flag here.
2362 // jni_SetField_probe() assumes that is okay to create handles.
2363 if (JvmtiExport::should_post_field_modification()) {
2364 jvalue field_value;
2365 field_value.l = value;
2366 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2367 }
2368 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2369 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2370 JNI_END
2371
2372
2373
2374 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2375 , EntryProbe, ReturnProbe) \
2376 \
2377 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2378 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2379 EntryProbe; \
2380 \
2381 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2382 assert(id->is_static_field_id(), "invalid static field id"); \
2383 /* Keep JVMTI addition small and only check enabled flag here. */ \
2384 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2385 if (JvmtiExport::should_post_field_modification()) { \
2386 jvalue field_value; \
2387 field_value.unionType = value; \
2388 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2389 } \
2390 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2391 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2392 ReturnProbe;\
2393 JNI_END
2394
2395 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2396 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2397 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2398 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2399 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2400 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2401 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2402 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2403 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2404 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2405 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2406 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2407 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2408 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2409 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2410 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2411 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2412 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2413 // Float and double probes don't return value because dtrace doesn't currently support it
2414 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2415 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2416 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2417 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2418 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2419 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2420
2421 //
2422 // String Operations
2423 //
2424
2425 // Unicode Interface
2426
2427 DT_RETURN_MARK_DECL(NewString, jstring
2428 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2429
2430 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2431 JNIWrapper("NewString");
2432 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2433 jstring ret = NULL;
2434 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2435 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2436 ret = (jstring) JNIHandles::make_local(env, string);
2437 return ret;
2438 JNI_END
2439
2440
2441 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2442 JNIWrapper("GetStringLength");
2443 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2444 jsize ret = 0;
2445 oop s = JNIHandles::resolve_non_null(string);
2446 if (java_lang_String::value(s) != NULL) {
2447 ret = java_lang_String::length(s);
2448 }
2449 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2450 return ret;
2451 JNI_END
2452
2453
2454 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2455 JNIEnv *env, jstring string, jboolean *isCopy))
2456 JNIWrapper("GetStringChars");
2457 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2458 jchar* buf = NULL;
2459 oop s = JNIHandles::resolve_non_null(string);
2460 typeArrayOop s_value = java_lang_String::value(s);
2461 if (s_value != NULL) {
2462 int s_len = java_lang_String::length(s);
2463 bool is_latin1 = java_lang_String::is_latin1(s);
2464 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2465 /* JNI Specification states return NULL on OOM */
2466 if (buf != NULL) {
2467 if (s_len > 0) {
2468 if (!is_latin1) {
2469 ArrayAccess<>::arraycopy_to_native<>(s_value, (size_t) typeArrayOopDesc::element_offset<jchar>(0),
2470 buf, s_len);
2471 } else {
2472 for (int i = 0; i < s_len; i++) {
2473 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2474 }
2475 }
2476 }
2477 buf[s_len] = 0;
2478 //%note jni_5
2479 if (isCopy != NULL) {
2480 *isCopy = JNI_TRUE;
2481 }
2482 }
2483 }
2484 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2485 return buf;
2486 JNI_END
2487
2488
2489 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2490 JNIWrapper("ReleaseStringChars");
2491 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2492 //%note jni_6
2493 if (chars != NULL) {
2494 // Since String objects are supposed to be immutable, don't copy any
2495 // new data back. A bad user will have to go after the char array.
2496 FreeHeap((void*) chars);
2497 }
2498 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2499 JNI_END
2500
2501
2502 // UTF Interface
2503
2504 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2505 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2506
2507 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2508 JNIWrapper("NewStringUTF");
2509 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2510 jstring ret;
2511 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2512
2513 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2514 ret = (jstring) JNIHandles::make_local(env, result);
2515 return ret;
2516 JNI_END
2517
2518
2519 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2520 JNIWrapper("GetStringUTFLength");
2521 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2522 jsize ret = 0;
2523 oop java_string = JNIHandles::resolve_non_null(string);
2524 if (java_lang_String::value(java_string) != NULL) {
2525 ret = java_lang_String::utf8_length(java_string);
2526 }
2527 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2528 return ret;
2529 JNI_END
2530
2531
2532 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2533 JNIWrapper("GetStringUTFChars");
2534 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2535 char* result = NULL;
2536 oop java_string = JNIHandles::resolve_non_null(string);
2537 if (java_lang_String::value(java_string) != NULL) {
2538 size_t length = java_lang_String::utf8_length(java_string);
2539 /* JNI Specification states return NULL on OOM */
2540 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2541 if (result != NULL) {
2542 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2543 if (isCopy != NULL) {
2544 *isCopy = JNI_TRUE;
2545 }
2546 }
2547 }
2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2549 return result;
2550 JNI_END
2551
2552
2553 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2554 JNIWrapper("ReleaseStringUTFChars");
2555 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2556 if (chars != NULL) {
2557 FreeHeap((char*) chars);
2558 }
2559 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2560 JNI_END
2561
2562
2563 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2564 JNIWrapper("GetArrayLength");
2565 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2566 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2567 assert(a->is_array(), "must be array");
2568 jsize ret = a->length();
2569 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2570 return ret;
2571 JNI_END
2572
2573
2574 //
2575 // Object Array Operations
2576 //
2577
2578 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2579 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2580
2581 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2582 JNIWrapper("NewObjectArray");
2583 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2584 jobjectArray ret = NULL;
2585 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2586 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2587 Klass* ak = ek->array_klass(CHECK_NULL);
2588 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2589 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2590 oop initial_value = JNIHandles::resolve(initialElement);
2591 if (initial_value != NULL) { // array already initialized with NULL
2592 for (int index = 0; index < length; index++) {
2593 result->obj_at_put(index, initial_value);
2594 }
2595 }
2596 ret = (jobjectArray) JNIHandles::make_local(env, result);
2597 return ret;
2598 JNI_END
2599
2600 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2601 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2602
2603 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2604 JNIWrapper("GetObjectArrayElement");
2605 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2606 jobject ret = NULL;
2607 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2608 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2609 if (a->is_within_bounds(index)) {
2610 ret = JNIHandles::make_local(env, a->obj_at(index));
2611 return ret;
2612 } else {
2613 char buf[jintAsStringSize];
2614 sprintf(buf, "%d", index);
2615 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2616 }
2617 JNI_END
2618
2619 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2620 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2621
2622 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2623 JNIWrapper("SetObjectArrayElement");
2624 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2625 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2626
2627 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2628 oop v = JNIHandles::resolve(value);
2629 if (a->is_within_bounds(index)) {
2630 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2631 a->obj_at_put(index, v);
2632 } else {
2633 THROW(vmSymbols::java_lang_ArrayStoreException());
2634 }
2635 } else {
2636 char buf[jintAsStringSize];
2637 sprintf(buf, "%d", index);
2638 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2639 }
2640 JNI_END
2641
2642
2643
2644 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2645 ,EntryProbe,ReturnProbe) \
2646 \
2647 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2648 , ReturnProbe); \
2649 \
2650 JNI_ENTRY(Return, \
2651 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2652 JNIWrapper("New" XSTR(Result) "Array"); \
2653 EntryProbe; \
2654 Return ret = NULL;\
2655 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2656 \
2657 oop obj= oopFactory::Allocator(len, CHECK_0); \
2658 ret = (Return) JNIHandles::make_local(env, obj); \
2659 return ret;\
2660 JNI_END
2661
2662 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2663 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2664 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2665 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2666 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2667 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2668 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2669 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2670 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2671 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2672 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2673 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2674 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2675 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2676 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2677 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2678 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2681 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2684 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2686
2687 // Return an address which will fault if the caller writes to it.
2688
2689 static char* get_bad_address() {
2690 static char* bad_address = NULL;
2691 if (bad_address == NULL) {
2692 size_t size = os::vm_allocation_granularity();
2693 bad_address = os::reserve_memory(size);
2694 if (bad_address != NULL) {
2695 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2696 /*is_committed*/false);
2697 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2698 }
2699 }
2700 return bad_address;
2701 }
2702
2703
2704
2705 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2706 , EntryProbe, ReturnProbe) \
2707 \
2708 JNI_QUICK_ENTRY(ElementType*, \
2709 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2710 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2711 EntryProbe; \
2712 /* allocate an chunk of memory in c land */ \
2713 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2714 ElementType* result; \
2715 int len = a->length(); \
2716 if (len == 0) { \
2717 /* Empty array: legal but useless, can't return NULL. \
2718 * Return a pointer to something useless. \
2719 * Avoid asserts in typeArrayOop. */ \
2720 result = (ElementType*)get_bad_address(); \
2721 } else { \
2722 /* JNI Specification states return NULL on OOM */ \
2723 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2724 if (result != NULL) { \
2725 /* copy the array to the c chunk */ \
2726 ArrayAccess<>::arraycopy_to_native<>(a, typeArrayOopDesc::element_offset<ElementType>(0), \
2727 result, len); \
2728 if (isCopy) { \
2729 *isCopy = JNI_TRUE; \
2730 } \
2731 } \
2732 } \
2733 ReturnProbe; \
2734 return result; \
2735 JNI_END
2736
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2738 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2741 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2744 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2747 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2750 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2752 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2753 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2754 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2755 // Float and double probes don't return value because dtrace doesn't currently support it
2756 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2757 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2760 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2762
2763
2764 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2765 , EntryProbe, ReturnProbe);\
2766 \
2767 JNI_QUICK_ENTRY(void, \
2768 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2769 ElementType *buf, jint mode)) \
2770 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2771 EntryProbe; \
2772 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2773 int len = a->length(); \
2774 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2775 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2776 ArrayAccess<>::arraycopy_from_native<>(buf, a, typeArrayOopDesc::element_offset<ElementType>(0), len); \
2777 } \
2778 if ((mode == 0) || (mode == JNI_ABORT)) { \
2779 FreeHeap(buf); \
2780 } \
2781 } \
2782 ReturnProbe; \
2783 JNI_END
2784
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2786 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2789 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2790 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2792 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2795 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2798 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2801 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2802 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2804 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2805 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2806 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2807 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2808 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2809
2810
2811 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2812 , EntryProbe, ReturnProbe); \
2813 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2814 , ReturnProbe); \
2815 \
2816 JNI_ENTRY(void, \
2817 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2818 jsize len, ElementType *buf)) \
2819 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2820 EntryProbe; \
2821 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2822 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2823 if (start < 0 || len < 0 || (start > src->length() - len)) { \
2824 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2825 } else { \
2826 if (len > 0) { \
2827 ArrayAccess<>::arraycopy_to_native<>(src, typeArrayOopDesc::element_offset<ElementType>(start), buf, len); \
2828 } \
2829 } \
2830 JNI_END
2831
2832 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2833 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2834 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2835 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2836 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2837 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2838 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2839 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2840 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2841 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2842 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2843 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2844 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2845 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2846 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2847 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2848 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2849 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2851 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2852 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2854 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2855 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2856
2857
2858 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2859 , EntryProbe, ReturnProbe); \
2860 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2861 ,ReturnProbe); \
2862 \
2863 JNI_ENTRY(void, \
2864 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2865 jsize len, const ElementType *buf)) \
2866 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2867 EntryProbe; \
2868 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2869 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2870 if (start < 0 || len < 0 || (start > dst->length() - len)) { \
2871 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2872 } else { \
2873 if (len > 0) { \
2874 ArrayAccess<>::arraycopy_from_native<>(buf, dst, typeArrayOopDesc::element_offset<ElementType>(start), len); \
2875 } \
2876 } \
2877 JNI_END
2878
2879 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2880 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2881 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2882 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2883 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2884 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2885 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2886 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2887 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2889 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2890 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2892 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2893 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2895 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2896 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2898 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2899 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2901 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2902 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2903
2904
2905 //
2906 // Interception of natives
2907 //
2908
2909 // The RegisterNatives call being attempted tried to register with a method that
2910 // is not native. Ask JVM TI what prefixes have been specified. Then check
2911 // to see if the native method is now wrapped with the prefixes. See the
2912 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2913 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2914 #if INCLUDE_JVMTI
2915 ResourceMark rm(THREAD);
2916 Method* method;
2917 int name_len = name->utf8_length();
2918 char* name_str = name->as_utf8();
2919 int prefix_count;
2920 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2921 for (int i = 0; i < prefix_count; i++) {
2922 char* prefix = prefixes[i];
2923 int prefix_len = (int)strlen(prefix);
2924
2925 // try adding this prefix to the method name and see if it matches another method name
2926 int trial_len = name_len + prefix_len;
2927 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2928 strcpy(trial_name_str, prefix);
2929 strcat(trial_name_str, name_str);
2930 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2931 if (trial_name == NULL) {
2932 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2933 }
2934 method = k->lookup_method(trial_name, signature);
2935 if (method == NULL) {
2936 continue; // signature doesn't match, try the next prefix
2937 }
2938 if (method->is_native()) {
2939 method->set_is_prefixed_native();
2940 return method; // wahoo, we found a prefixed version of the method, return it
2941 }
2942 // found as non-native, so prefix is good, add it, probably just need more prefixes
2943 name_len = trial_len;
2944 name_str = trial_name_str;
2945 }
2946 #endif // INCLUDE_JVMTI
2947 return NULL; // not found
2948 }
2949
2950 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2951 Method* method = k->lookup_method(name, signature);
2952 if (method == NULL) {
2953 ResourceMark rm;
2954 stringStream st;
2955 st.print("Method %s name or signature does not match",
2956 Method::name_and_sig_as_C_string(k, name, signature));
2957 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2958 }
2959 if (!method->is_native()) {
2960 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2961 method = find_prefixed_native(k, name, signature, THREAD);
2962 if (method == NULL) {
2963 ResourceMark rm;
2964 stringStream st;
2965 st.print("Method %s is not declared as native",
2966 Method::name_and_sig_as_C_string(k, name, signature));
2967 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2968 }
2969 }
2970
2971 if (entry != NULL) {
2972 method->set_native_function(entry,
2973 Method::native_bind_event_is_interesting);
2974 } else {
2975 method->clear_native_function();
2976 }
2977 if (PrintJNIResolving) {
2978 ResourceMark rm(THREAD);
2979 tty->print_cr("[Registering JNI native method %s.%s]",
2980 method->method_holder()->external_name(),
2981 method->name()->as_C_string());
2982 }
2983 return true;
2984 }
2985
2986 DT_RETURN_MARK_DECL(RegisterNatives, jint
2987 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2988
2989 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2990 const JNINativeMethod *methods,
2991 jint nMethods))
2992 JNIWrapper("RegisterNatives");
2993 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2994 jint ret = 0;
2995 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2996
2997 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2998
2999 for (int index = 0; index < nMethods; index++) {
3000 const char* meth_name = methods[index].name;
3001 const char* meth_sig = methods[index].signature;
3002 int meth_name_len = (int)strlen(meth_name);
3003
3004 // The class should have been loaded (we have an instance of the class
3005 // passed in) so the method and signature should already be in the symbol
3006 // table. If they're not there, the method doesn't exist.
3007 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3008 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3009
3010 if (name == NULL || signature == NULL) {
3011 ResourceMark rm;
3012 stringStream st;
3013 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3014 // Must return negative value on failure
3015 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3016 }
3017
3018 bool res = register_native(k, name, signature,
3019 (address) methods[index].fnPtr, THREAD);
3020 if (!res) {
3021 ret = -1;
3022 break;
3023 }
3024 }
3025 return ret;
3026 JNI_END
3027
3028
3029 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3030 JNIWrapper("UnregisterNatives");
3031 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3032 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3033 //%note jni_2
3034 if (k->is_instance_klass()) {
3035 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3036 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3037 if (m->is_native()) {
3038 m->clear_native_function();
3039 m->set_signature_handler(NULL);
3040 }
3041 }
3042 }
3043 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3044 return 0;
3045 JNI_END
3046
3047 //
3048 // Monitor functions
3049 //
3050
3051 DT_RETURN_MARK_DECL(MonitorEnter, jint
3052 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3053
3054 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3055 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3056 jint ret = JNI_ERR;
3057 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3058
3059 // If the object is null, we can't do anything with it
3060 if (jobj == NULL) {
3061 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3062 }
3063
3064 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3065 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3066 ret = JNI_OK;
3067 return ret;
3068 JNI_END
3069
3070 DT_RETURN_MARK_DECL(MonitorExit, jint
3071 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3072
3073 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3074 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3075 jint ret = JNI_ERR;
3076 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3077
3078 // Don't do anything with a null object
3079 if (jobj == NULL) {
3080 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3081 }
3082
3083 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3084 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3085
3086 ret = JNI_OK;
3087 return ret;
3088 JNI_END
3089
3090 //
3091 // Extensions
3092 //
3093
3094 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3095 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3096
3097 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3098 JNIWrapper("GetStringRegion");
3099 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3100 DT_VOID_RETURN_MARK(GetStringRegion);
3101 oop s = JNIHandles::resolve_non_null(string);
3102 int s_len = java_lang_String::length(s);
3103 if (start < 0 || len < 0 || start > s_len - len) {
3104 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3105 } else {
3106 if (len > 0) {
3107 typeArrayOop s_value = java_lang_String::value(s);
3108 bool is_latin1 = java_lang_String::is_latin1(s);
3109 if (!is_latin1) {
3110 ArrayAccess<>::arraycopy_to_native<>(s_value, typeArrayOopDesc::element_offset<jchar>(start),
3111 buf, len);
3112 } else {
3113 for (int i = 0; i < len; i++) {
3114 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3115 }
3116 }
3117 }
3118 }
3119 JNI_END
3120
3121 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3122 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3123
3124 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3125 JNIWrapper("GetStringUTFRegion");
3126 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3127 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3128 oop s = JNIHandles::resolve_non_null(string);
3129 int s_len = java_lang_String::length(s);
3130 if (start < 0 || len < 0 || start > s_len - len) {
3131 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3132 } else {
3133 //%note jni_7
3134 if (len > 0) {
3135 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3136 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3137 // as_utf8_string null-terminates the result string
3138 } else {
3139 // JDK null-terminates the buffer even in len is zero
3140 if (buf != NULL) {
3141 buf[0] = 0;
3142 }
3143 }
3144 }
3145 JNI_END
3146
3147 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3148 if (Universe::heap()->supports_object_pinning()) {
3149 const oop o = JNIHandles::resolve_non_null(obj);
3150 return Universe::heap()->pin_object(thread, o);
3151 } else {
3152 GCLocker::lock_critical(thread);
3153 return JNIHandles::resolve_non_null(obj);
3154 }
3155 }
3156
3157 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3158 if (Universe::heap()->supports_object_pinning()) {
3159 const oop o = JNIHandles::resolve_non_null(obj);
3160 return Universe::heap()->unpin_object(thread, o);
3161 } else {
3162 GCLocker::unlock_critical(thread);
3163 }
3164 }
3165
3166 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3167 JNIWrapper("GetPrimitiveArrayCritical");
3168 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3169 if (isCopy != NULL) {
3170 *isCopy = JNI_FALSE;
3171 }
3172 oop a = lock_gc_or_pin_object(thread, array);
3173 assert(a->is_array(), "just checking");
3174 BasicType type;
3175 if (a->is_objArray()) {
3176 type = T_OBJECT;
3177 } else {
3178 type = TypeArrayKlass::cast(a->klass())->element_type();
3179 }
3180 void* ret = arrayOop(a)->base(type);
3181 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3182 return ret;
3183 JNI_END
3184
3185
3186 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3187 JNIWrapper("ReleasePrimitiveArrayCritical");
3188 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3189 unlock_gc_or_unpin_object(thread, array);
3190 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3191 JNI_END
3192
3193
3194 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3195 JNIWrapper("GetStringCritical");
3196 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3197 oop s = lock_gc_or_pin_object(thread, string);
3198 typeArrayOop s_value = java_lang_String::value(s);
3199 bool is_latin1 = java_lang_String::is_latin1(s);
3200 if (isCopy != NULL) {
3201 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3202 }
3203 jchar* ret;
3204 if (!is_latin1) {
3205 ret = (jchar*) s_value->base(T_CHAR);
3206 } else {
3207 // Inflate latin1 encoded string to UTF16
3208 int s_len = java_lang_String::length(s);
3209 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3210 /* JNI Specification states return NULL on OOM */
3211 if (ret != NULL) {
3212 for (int i = 0; i < s_len; i++) {
3213 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3214 }
3215 ret[s_len] = 0;
3216 }
3217 }
3218 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3219 return ret;
3220 JNI_END
3221
3222
3223 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3224 JNIWrapper("ReleaseStringCritical");
3225 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3226 // The str and chars arguments are ignored for UTF16 strings
3227 oop s = JNIHandles::resolve_non_null(str);
3228 bool is_latin1 = java_lang_String::is_latin1(s);
3229 if (is_latin1) {
3230 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3231 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3232 FREE_C_HEAP_ARRAY(jchar, chars);
3233 }
3234 unlock_gc_or_unpin_object(thread, str);
3235 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3236 JNI_END
3237
3238
3239 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3240 JNIWrapper("jni_NewWeakGlobalRef");
3241 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3242 Handle ref_handle(thread, JNIHandles::resolve(ref));
3243 jweak ret = JNIHandles::make_weak_global(ref_handle);
3244 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3245 return ret;
3246 JNI_END
3247
3248 // Must be JNI_ENTRY (with HandleMark)
3249 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3250 JNIWrapper("jni_DeleteWeakGlobalRef");
3251 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3252 JNIHandles::destroy_weak_global(ref);
3253 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3254 JNI_END
3255
3256
3257 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3258 JNIWrapper("jni_ExceptionCheck");
3259 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3260 jni_check_async_exceptions(thread);
3261 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3262 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3263 return ret;
3264 JNI_END
3265
3266
3267 // Initialization state for three routines below relating to
3268 // java.nio.DirectBuffers
3269 static int directBufferSupportInitializeStarted = 0;
3270 static volatile int directBufferSupportInitializeEnded = 0;
3271 static volatile int directBufferSupportInitializeFailed = 0;
3272 static jclass bufferClass = NULL;
3273 static jclass directBufferClass = NULL;
3274 static jclass directByteBufferClass = NULL;
3275 static jmethodID directByteBufferConstructor = NULL;
3276 static jfieldID directBufferAddressField = NULL;
3277 static jfieldID bufferCapacityField = NULL;
3278
3279 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3280 Handle loader; // null (bootstrap) loader
3281 Handle protection_domain; // null protection domain
3282
3283 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3284 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3285
3286 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3287 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3288 }
3289 return result;
3290 }
3291
3292 // These lookups are done with the NULL (bootstrap) ClassLoader to
3293 // circumvent any security checks that would be done by jni_FindClass.
3294 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3295 {
3296 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3297 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3298 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3299 return true;
3300 }
3301 JNI_END
3302
3303
3304 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3305 if (directBufferSupportInitializeFailed) {
3306 return false;
3307 }
3308
3309 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3310 if (!lookupDirectBufferClasses(env)) {
3311 directBufferSupportInitializeFailed = 1;
3312 return false;
3313 }
3314
3315 // Make global references for these
3316 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3317 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3318 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3319
3320 // Get needed field and method IDs
3321 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3322 if (env->ExceptionCheck()) {
3323 env->ExceptionClear();
3324 directBufferSupportInitializeFailed = 1;
3325 return false;
3326 }
3327 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3328 if (env->ExceptionCheck()) {
3329 env->ExceptionClear();
3330 directBufferSupportInitializeFailed = 1;
3331 return false;
3332 }
3333 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3334 if (env->ExceptionCheck()) {
3335 env->ExceptionClear();
3336 directBufferSupportInitializeFailed = 1;
3337 return false;
3338 }
3339
3340 if ((directByteBufferConstructor == NULL) ||
3341 (directBufferAddressField == NULL) ||
3342 (bufferCapacityField == NULL)) {
3343 directBufferSupportInitializeFailed = 1;
3344 return false;
3345 }
3346
3347 directBufferSupportInitializeEnded = 1;
3348 } else {
3349 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3350 os::naked_yield();
3351 }
3352 }
3353
3354 return !directBufferSupportInitializeFailed;
3355 }
3356
3357 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3358 {
3359 // thread_from_jni_environment() will block if VM is gone.
3360 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3361
3362 JNIWrapper("jni_NewDirectByteBuffer");
3363 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3364
3365 if (!directBufferSupportInitializeEnded) {
3366 if (!initializeDirectBufferSupport(env, thread)) {
3367 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3368 return NULL;
3369 }
3370 }
3371
3372 // Being paranoid about accidental sign extension on address
3373 jlong addr = (jlong) ((uintptr_t) address);
3374 // NOTE that package-private DirectByteBuffer constructor currently
3375 // takes int capacity
3376 jint cap = (jint) capacity;
3377 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3378 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3379 return ret;
3380 }
3381
3382 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3383 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3384
3385 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3386 {
3387 // thread_from_jni_environment() will block if VM is gone.
3388 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3389
3390 JNIWrapper("jni_GetDirectBufferAddress");
3391 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3392 void* ret = NULL;
3393 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3394
3395 if (!directBufferSupportInitializeEnded) {
3396 if (!initializeDirectBufferSupport(env, thread)) {
3397 return 0;
3398 }
3399 }
3400
3401 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3402 return 0;
3403 }
3404
3405 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3406 return ret;
3407 }
3408
3409 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3410 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3411
3412 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3413 {
3414 // thread_from_jni_environment() will block if VM is gone.
3415 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3416
3417 JNIWrapper("jni_GetDirectBufferCapacity");
3418 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3419 jlong ret = -1;
3420 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3421
3422 if (!directBufferSupportInitializeEnded) {
3423 if (!initializeDirectBufferSupport(env, thread)) {
3424 ret = 0;
3425 return ret;
3426 }
3427 }
3428
3429 if (buf == NULL) {
3430 return -1;
3431 }
3432
3433 if (!env->IsInstanceOf(buf, directBufferClass)) {
3434 return -1;
3435 }
3436
3437 // NOTE that capacity is currently an int in the implementation
3438 ret = env->GetIntField(buf, bufferCapacityField);
3439 return ret;
3440 }
3441
3442
3443 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3444 JNIWrapper("GetVersion");
3445 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3446 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3447 return CurrentVersion;
3448 JNI_END
3449
3450 extern struct JavaVM_ main_vm;
3451
3452 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3453 JNIWrapper("jni_GetJavaVM");
3454 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3455 *vm = (JavaVM *)(&main_vm);
3456 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3457 return JNI_OK;
3458 JNI_END
3459
3460
3461 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3462 JNIWrapper("GetModule");
3463 return Modules::get_module(clazz, THREAD);
3464 JNI_END
3465
3466
3467 // Structure containing all jni functions
3468 struct JNINativeInterface_ jni_NativeInterface = {
3469 NULL,
3470 NULL,
3471 NULL,
3472
3473 NULL,
3474
3475 jni_GetVersion,
3476
3477 jni_DefineClass,
3478 jni_FindClass,
3479
3480 jni_FromReflectedMethod,
3481 jni_FromReflectedField,
3482
3483 jni_ToReflectedMethod,
3484
3485 jni_GetSuperclass,
3486 jni_IsAssignableFrom,
3487
3488 jni_ToReflectedField,
3489
3490 jni_Throw,
3491 jni_ThrowNew,
3492 jni_ExceptionOccurred,
3493 jni_ExceptionDescribe,
3494 jni_ExceptionClear,
3495 jni_FatalError,
3496
3497 jni_PushLocalFrame,
3498 jni_PopLocalFrame,
3499
3500 jni_NewGlobalRef,
3501 jni_DeleteGlobalRef,
3502 jni_DeleteLocalRef,
3503 jni_IsSameObject,
3504
3505 jni_NewLocalRef,
3506 jni_EnsureLocalCapacity,
3507
3508 jni_AllocObject,
3509 jni_NewObject,
3510 jni_NewObjectV,
3511 jni_NewObjectA,
3512
3513 jni_GetObjectClass,
3514 jni_IsInstanceOf,
3515
3516 jni_GetMethodID,
3517
3518 jni_CallObjectMethod,
3519 jni_CallObjectMethodV,
3520 jni_CallObjectMethodA,
3521 jni_CallBooleanMethod,
3522 jni_CallBooleanMethodV,
3523 jni_CallBooleanMethodA,
3524 jni_CallByteMethod,
3525 jni_CallByteMethodV,
3526 jni_CallByteMethodA,
3527 jni_CallCharMethod,
3528 jni_CallCharMethodV,
3529 jni_CallCharMethodA,
3530 jni_CallShortMethod,
3531 jni_CallShortMethodV,
3532 jni_CallShortMethodA,
3533 jni_CallIntMethod,
3534 jni_CallIntMethodV,
3535 jni_CallIntMethodA,
3536 jni_CallLongMethod,
3537 jni_CallLongMethodV,
3538 jni_CallLongMethodA,
3539 jni_CallFloatMethod,
3540 jni_CallFloatMethodV,
3541 jni_CallFloatMethodA,
3542 jni_CallDoubleMethod,
3543 jni_CallDoubleMethodV,
3544 jni_CallDoubleMethodA,
3545 jni_CallVoidMethod,
3546 jni_CallVoidMethodV,
3547 jni_CallVoidMethodA,
3548
3549 jni_CallNonvirtualObjectMethod,
3550 jni_CallNonvirtualObjectMethodV,
3551 jni_CallNonvirtualObjectMethodA,
3552 jni_CallNonvirtualBooleanMethod,
3553 jni_CallNonvirtualBooleanMethodV,
3554 jni_CallNonvirtualBooleanMethodA,
3555 jni_CallNonvirtualByteMethod,
3556 jni_CallNonvirtualByteMethodV,
3557 jni_CallNonvirtualByteMethodA,
3558 jni_CallNonvirtualCharMethod,
3559 jni_CallNonvirtualCharMethodV,
3560 jni_CallNonvirtualCharMethodA,
3561 jni_CallNonvirtualShortMethod,
3562 jni_CallNonvirtualShortMethodV,
3563 jni_CallNonvirtualShortMethodA,
3564 jni_CallNonvirtualIntMethod,
3565 jni_CallNonvirtualIntMethodV,
3566 jni_CallNonvirtualIntMethodA,
3567 jni_CallNonvirtualLongMethod,
3568 jni_CallNonvirtualLongMethodV,
3569 jni_CallNonvirtualLongMethodA,
3570 jni_CallNonvirtualFloatMethod,
3571 jni_CallNonvirtualFloatMethodV,
3572 jni_CallNonvirtualFloatMethodA,
3573 jni_CallNonvirtualDoubleMethod,
3574 jni_CallNonvirtualDoubleMethodV,
3575 jni_CallNonvirtualDoubleMethodA,
3576 jni_CallNonvirtualVoidMethod,
3577 jni_CallNonvirtualVoidMethodV,
3578 jni_CallNonvirtualVoidMethodA,
3579
3580 jni_GetFieldID,
3581
3582 jni_GetObjectField,
3583 jni_GetBooleanField,
3584 jni_GetByteField,
3585 jni_GetCharField,
3586 jni_GetShortField,
3587 jni_GetIntField,
3588 jni_GetLongField,
3589 jni_GetFloatField,
3590 jni_GetDoubleField,
3591
3592 jni_SetObjectField,
3593 jni_SetBooleanField,
3594 jni_SetByteField,
3595 jni_SetCharField,
3596 jni_SetShortField,
3597 jni_SetIntField,
3598 jni_SetLongField,
3599 jni_SetFloatField,
3600 jni_SetDoubleField,
3601
3602 jni_GetStaticMethodID,
3603
3604 jni_CallStaticObjectMethod,
3605 jni_CallStaticObjectMethodV,
3606 jni_CallStaticObjectMethodA,
3607 jni_CallStaticBooleanMethod,
3608 jni_CallStaticBooleanMethodV,
3609 jni_CallStaticBooleanMethodA,
3610 jni_CallStaticByteMethod,
3611 jni_CallStaticByteMethodV,
3612 jni_CallStaticByteMethodA,
3613 jni_CallStaticCharMethod,
3614 jni_CallStaticCharMethodV,
3615 jni_CallStaticCharMethodA,
3616 jni_CallStaticShortMethod,
3617 jni_CallStaticShortMethodV,
3618 jni_CallStaticShortMethodA,
3619 jni_CallStaticIntMethod,
3620 jni_CallStaticIntMethodV,
3621 jni_CallStaticIntMethodA,
3622 jni_CallStaticLongMethod,
3623 jni_CallStaticLongMethodV,
3624 jni_CallStaticLongMethodA,
3625 jni_CallStaticFloatMethod,
3626 jni_CallStaticFloatMethodV,
3627 jni_CallStaticFloatMethodA,
3628 jni_CallStaticDoubleMethod,
3629 jni_CallStaticDoubleMethodV,
3630 jni_CallStaticDoubleMethodA,
3631 jni_CallStaticVoidMethod,
3632 jni_CallStaticVoidMethodV,
3633 jni_CallStaticVoidMethodA,
3634
3635 jni_GetStaticFieldID,
3636
3637 jni_GetStaticObjectField,
3638 jni_GetStaticBooleanField,
3639 jni_GetStaticByteField,
3640 jni_GetStaticCharField,
3641 jni_GetStaticShortField,
3642 jni_GetStaticIntField,
3643 jni_GetStaticLongField,
3644 jni_GetStaticFloatField,
3645 jni_GetStaticDoubleField,
3646
3647 jni_SetStaticObjectField,
3648 jni_SetStaticBooleanField,
3649 jni_SetStaticByteField,
3650 jni_SetStaticCharField,
3651 jni_SetStaticShortField,
3652 jni_SetStaticIntField,
3653 jni_SetStaticLongField,
3654 jni_SetStaticFloatField,
3655 jni_SetStaticDoubleField,
3656
3657 jni_NewString,
3658 jni_GetStringLength,
3659 jni_GetStringChars,
3660 jni_ReleaseStringChars,
3661
3662 jni_NewStringUTF,
3663 jni_GetStringUTFLength,
3664 jni_GetStringUTFChars,
3665 jni_ReleaseStringUTFChars,
3666
3667 jni_GetArrayLength,
3668
3669 jni_NewObjectArray,
3670 jni_GetObjectArrayElement,
3671 jni_SetObjectArrayElement,
3672
3673 jni_NewBooleanArray,
3674 jni_NewByteArray,
3675 jni_NewCharArray,
3676 jni_NewShortArray,
3677 jni_NewIntArray,
3678 jni_NewLongArray,
3679 jni_NewFloatArray,
3680 jni_NewDoubleArray,
3681
3682 jni_GetBooleanArrayElements,
3683 jni_GetByteArrayElements,
3684 jni_GetCharArrayElements,
3685 jni_GetShortArrayElements,
3686 jni_GetIntArrayElements,
3687 jni_GetLongArrayElements,
3688 jni_GetFloatArrayElements,
3689 jni_GetDoubleArrayElements,
3690
3691 jni_ReleaseBooleanArrayElements,
3692 jni_ReleaseByteArrayElements,
3693 jni_ReleaseCharArrayElements,
3694 jni_ReleaseShortArrayElements,
3695 jni_ReleaseIntArrayElements,
3696 jni_ReleaseLongArrayElements,
3697 jni_ReleaseFloatArrayElements,
3698 jni_ReleaseDoubleArrayElements,
3699
3700 jni_GetBooleanArrayRegion,
3701 jni_GetByteArrayRegion,
3702 jni_GetCharArrayRegion,
3703 jni_GetShortArrayRegion,
3704 jni_GetIntArrayRegion,
3705 jni_GetLongArrayRegion,
3706 jni_GetFloatArrayRegion,
3707 jni_GetDoubleArrayRegion,
3708
3709 jni_SetBooleanArrayRegion,
3710 jni_SetByteArrayRegion,
3711 jni_SetCharArrayRegion,
3712 jni_SetShortArrayRegion,
3713 jni_SetIntArrayRegion,
3714 jni_SetLongArrayRegion,
3715 jni_SetFloatArrayRegion,
3716 jni_SetDoubleArrayRegion,
3717
3718 jni_RegisterNatives,
3719 jni_UnregisterNatives,
3720
3721 jni_MonitorEnter,
3722 jni_MonitorExit,
3723
3724 jni_GetJavaVM,
3725
3726 jni_GetStringRegion,
3727 jni_GetStringUTFRegion,
3728
3729 jni_GetPrimitiveArrayCritical,
3730 jni_ReleasePrimitiveArrayCritical,
3731
3732 jni_GetStringCritical,
3733 jni_ReleaseStringCritical,
3734
3735 jni_NewWeakGlobalRef,
3736 jni_DeleteWeakGlobalRef,
3737
3738 jni_ExceptionCheck,
3739
3740 jni_NewDirectByteBuffer,
3741 jni_GetDirectBufferAddress,
3742 jni_GetDirectBufferCapacity,
3743
3744 // New 1_6 features
3745
3746 jni_GetObjectRefType,
3747
3748 // Module features
3749
3750 jni_GetModule
3751 };
3752
3753
3754 // For jvmti use to modify jni function table.
3755 // Java threads in native contiues to run until it is transitioned
3756 // to VM at safepoint. Before the transition or before it is blocked
3757 // for safepoint it may access jni function table. VM could crash if
3758 // any java thread access the jni function table in the middle of memcpy.
3759 // To avoid this each function pointers are copied automically.
3760 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3761 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3762 intptr_t *a = (intptr_t *) jni_functions();
3763 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3764 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3765 Atomic::store(*b++, a++);
3766 }
3767 }
3768
3769 void quicken_jni_functions() {
3770 // Replace Get<Primitive>Field with fast versions
3771 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3772 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3773 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3774 // windows x86 currently needs SEH wrapper and the gain of the fast
3775 // versions currently isn't certain for server vm on uniprocessor.
3776 && os::is_MP()
3777 #endif
3778 ) {
3779 address func;
3780 func = JNI_FastGetField::generate_fast_get_boolean_field();
3781 if (func != (address)-1) {
3782 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3783 }
3784 func = JNI_FastGetField::generate_fast_get_byte_field();
3785 if (func != (address)-1) {
3786 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3787 }
3788 func = JNI_FastGetField::generate_fast_get_char_field();
3789 if (func != (address)-1) {
3790 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3791 }
3792 func = JNI_FastGetField::generate_fast_get_short_field();
3793 if (func != (address)-1) {
3794 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3795 }
3796 func = JNI_FastGetField::generate_fast_get_int_field();
3797 if (func != (address)-1) {
3798 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3799 }
3800 func = JNI_FastGetField::generate_fast_get_long_field();
3801 if (func != (address)-1) {
3802 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3803 }
3804 func = JNI_FastGetField::generate_fast_get_float_field();
3805 if (func != (address)-1) {
3806 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3807 }
3808 func = JNI_FastGetField::generate_fast_get_double_field();
3809 if (func != (address)-1) {
3810 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3811 }
3812 }
3813 }
3814
3815 // Returns the function structure
3816 struct JNINativeInterface_* jni_functions() {
3817 #if INCLUDE_JNI_CHECK
3818 if (CheckJNICalls) return jni_functions_check();
3819 #endif // INCLUDE_JNI_CHECK
3820 return &jni_NativeInterface;
3821 }
3822
3823 // Returns the function structure
3824 struct JNINativeInterface_* jni_functions_nocheck() {
3825 return &jni_NativeInterface;
3826 }
3827
3828 static void post_thread_start_event(const JavaThread* jt) {
3829 assert(jt != NULL, "invariant");
3830 EventThreadStart event;
3831 if (event.should_commit()) {
3832 event.set_thread(JFR_THREAD_ID(jt));
3833 event.commit();
3834 }
3835 }
3836
3837 // Invocation API
3838
3839
3840 // Forward declaration
3841 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3842
3843 // Global invocation API vars
3844 volatile int vm_created = 0;
3845 // Indicate whether it is safe to recreate VM
3846 volatile int safe_to_recreate_vm = 1;
3847 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3848
3849
3850 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3851 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3852
3853 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3854 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3855
3856 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3857 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3858 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3859 jint ret = JNI_ERR;
3860 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3861
3862 if (Threads::is_supported_jni_version(args->version)) {
3863 ret = JNI_OK;
3864 }
3865 // 1.1 style no longer supported in hotspot.
3866 // According the JNI spec, we should update args->version on return.
3867 // We also use the structure to communicate with launcher about default
3868 // stack size.
3869 if (args->version == JNI_VERSION_1_1) {
3870 args->version = JNI_VERSION_1_2;
3871 // javaStackSize is int in arguments structure
3872 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3873 args->javaStackSize = (jint)(ThreadStackSize * K);
3874 }
3875 return ret;
3876 }
3877
3878 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3879 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3880
3881 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3882 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3883
3884 jint result = JNI_ERR;
3885 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3886
3887 // We're about to use Atomic::xchg for synchronization. Some Zero
3888 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3889 // but __sync_lock_test_and_set is not guaranteed to do what we want
3890 // on all architectures. So we check it works before relying on it.
3891 #if defined(ZERO) && defined(ASSERT)
3892 {
3893 jint a = 0xcafebabe;
3894 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3895 void *c = &a;
3896 void *d = Atomic::xchg(&b, &c);
3897 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3898 assert(c == &b && d == &a, "Atomic::xchg() works");
3899 }
3900 #endif // ZERO && ASSERT
3901
3902 // At the moment it's only possible to have one Java VM,
3903 // since some of the runtime state is in global variables.
3904
3905 // We cannot use our mutex locks here, since they only work on
3906 // Threads. We do an atomic compare and exchange to ensure only
3907 // one thread can call this method at a time
3908
3909 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3910 // the add/dec implementations are dependent on whether we are running
3911 // on a multiprocessor, and at this stage of initialization the os::is_MP
3912 // function used to determine this will always return false. Atomic::xchg
3913 // does not have this problem.
3914 if (Atomic::xchg(1, &vm_created) == 1) {
3915 return JNI_EEXIST; // already created, or create attempt in progress
3916 }
3917 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3918 return JNI_ERR; // someone tried and failed and retry not allowed.
3919 }
3920
3921 assert(vm_created == 1, "vm_created is true during the creation");
3922
3923 /**
3924 * Certain errors during initialization are recoverable and do not
3925 * prevent this method from being called again at a later time
3926 * (perhaps with different arguments). However, at a certain
3927 * point during initialization if an error occurs we cannot allow
3928 * this function to be called again (or it will crash). In those
3929 * situations, the 'canTryAgain' flag is set to false, which atomically
3930 * sets safe_to_recreate_vm to 1, such that any new call to
3931 * JNI_CreateJavaVM will immediately fail using the above logic.
3932 */
3933 bool can_try_again = true;
3934
3935 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3936 if (result == JNI_OK) {
3937 JavaThread *thread = JavaThread::current();
3938 assert(!thread->has_pending_exception(), "should have returned not OK");
3939 /* thread is thread_in_vm here */
3940 *vm = (JavaVM *)(&main_vm);
3941 *(JNIEnv**)penv = thread->jni_environment();
3942
3943 #if INCLUDE_JVMCI
3944 if (EnableJVMCI) {
3945 if (UseJVMCICompiler) {
3946 // JVMCI is initialized on a CompilerThread
3947 if (BootstrapJVMCI) {
3948 JavaThread* THREAD = thread;
3949 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3950 compiler->bootstrap(THREAD);
3951 if (HAS_PENDING_EXCEPTION) {
3952 HandleMark hm;
3953 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3954 }
3955 }
3956 }
3957 }
3958 #endif
3959
3960 // Tracks the time application was running before GC
3961 RuntimeService::record_application_start();
3962
3963 // Notify JVMTI
3964 if (JvmtiExport::should_post_thread_life()) {
3965 JvmtiExport::post_thread_start(thread);
3966 }
3967
3968 post_thread_start_event(thread);
3969
3970 #ifndef PRODUCT
3971 // Check if we should compile all classes on bootclasspath
3972 if (CompileTheWorld) ClassLoader::compile_the_world();
3973 if (ReplayCompiles) ciReplay::replay(thread);
3974
3975 // Some platforms (like Win*) need a wrapper around these test
3976 // functions in order to properly handle error conditions.
3977 VMError::test_error_handler();
3978 if (ExecuteInternalVMTests) {
3979 InternalVMTests::run();
3980 }
3981 #endif
3982
3983 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3984 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3985 } else {
3986 // If create_vm exits because of a pending exception, exit with that
3987 // exception. In the future when we figure out how to reclaim memory,
3988 // we may be able to exit with JNI_ERR and allow the calling application
3989 // to continue.
3990 if (Universe::is_fully_initialized()) {
3991 // otherwise no pending exception possible - VM will already have aborted
3992 JavaThread* THREAD = JavaThread::current();
3993 if (HAS_PENDING_EXCEPTION) {
3994 HandleMark hm;
3995 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3996 }
3997 }
3998
3999 if (can_try_again) {
4000 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4001 safe_to_recreate_vm = 1;
4002 }
4003
4004 // Creation failed. We must reset vm_created
4005 *vm = 0;
4006 *(JNIEnv**)penv = 0;
4007 // reset vm_created last to avoid race condition. Use OrderAccess to
4008 // control both compiler and architectural-based reordering.
4009 OrderAccess::release_store(&vm_created, 0);
4010 }
4011
4012 // Flush stdout and stderr before exit.
4013 fflush(stdout);
4014 fflush(stderr);
4015
4016 return result;
4017
4018 }
4019
4020 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4021 jint result = JNI_ERR;
4022 // On Windows, let CreateJavaVM run with SEH protection
4023 #ifdef _WIN32
4024 __try {
4025 #endif
4026 result = JNI_CreateJavaVM_inner(vm, penv, args);
4027 #ifdef _WIN32
4028 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4029 // Nothing to do.
4030 }
4031 #endif
4032 return result;
4033 }
4034
4035 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4036 // See bug 4367188, the wrapper can sometimes cause VM crashes
4037 // JNIWrapper("GetCreatedJavaVMs");
4038
4039 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4040
4041 if (vm_created == 1) {
4042 if (numVMs != NULL) *numVMs = 1;
4043 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4044 } else {
4045 if (numVMs != NULL) *numVMs = 0;
4046 }
4047 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4048 return JNI_OK;
4049 }
4050
4051 extern "C" {
4052
4053 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4054 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4055
4056 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4057 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4058 jint res = JNI_ERR;
4059 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4060
4061 if (vm_created == 0) {
4062 res = JNI_ERR;
4063 return res;
4064 }
4065
4066 JNIWrapper("DestroyJavaVM");
4067 JNIEnv *env;
4068 JavaVMAttachArgs destroyargs;
4069 destroyargs.version = CurrentVersion;
4070 destroyargs.name = (char *)"DestroyJavaVM";
4071 destroyargs.group = NULL;
4072 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4073 if (res != JNI_OK) {
4074 return res;
4075 }
4076
4077 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4078 JavaThread* thread = JavaThread::current();
4079 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4080 if (Threads::destroy_vm()) {
4081 // Should not change thread state, VM is gone
4082 vm_created = 0;
4083 res = JNI_OK;
4084 return res;
4085 } else {
4086 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4087 res = JNI_ERR;
4088 return res;
4089 }
4090 }
4091
4092 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4093 jint result = JNI_ERR;
4094 // On Windows, we need SEH protection
4095 #ifdef _WIN32
4096 __try {
4097 #endif
4098 result = jni_DestroyJavaVM_inner(vm);
4099 #ifdef _WIN32
4100 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4101 // Nothing to do.
4102 }
4103 #endif
4104 return result;
4105 }
4106
4107 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4108 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4109
4110 // Check below commented out from JDK1.2fcs as well
4111 /*
4112 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4113 return JNI_EVERSION;
4114 }
4115 */
4116
4117 Thread* t = Thread::current_or_null();
4118 if (t != NULL) {
4119 // If the thread has been attached this operation is a no-op
4120 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4121 return JNI_OK;
4122 }
4123
4124 // Create a thread and mark it as attaching so it will be skipped by the
4125 // ThreadsListEnumerator - see CR 6404306
4126 JavaThread* thread = new JavaThread(true);
4127
4128 // Set correct safepoint info. The thread is going to call into Java when
4129 // initializing the Java level thread object. Hence, the correct state must
4130 // be set in order for the Safepoint code to deal with it correctly.
4131 thread->set_thread_state(_thread_in_vm);
4132 thread->record_stack_base_and_size();
4133 thread->initialize_thread_current();
4134
4135 if (!os::create_attached_thread(thread)) {
4136 thread->smr_delete();
4137 return JNI_ERR;
4138 }
4139 // Enable stack overflow checks
4140 thread->create_stack_guard_pages();
4141
4142 thread->initialize_tlab();
4143
4144 thread->cache_global_variables();
4145
4146 // Crucial that we do not have a safepoint check for this thread, since it has
4147 // not been added to the Thread list yet.
4148 { Threads_lock->lock_without_safepoint_check();
4149 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4150 // avoid this thread trying to do a GC before it is added to the thread-list
4151 thread->set_active_handles(JNIHandleBlock::allocate_block());
4152 Threads::add(thread, daemon);
4153 Threads_lock->unlock();
4154 }
4155 // Create thread group and name info from attach arguments
4156 oop group = NULL;
4157 char* thread_name = NULL;
4158 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4159 group = JNIHandles::resolve(args->group);
4160 thread_name = args->name; // may be NULL
4161 }
4162 if (group == NULL) group = Universe::main_thread_group();
4163
4164 // Create Java level thread object and attach it to this thread
4165 bool attach_failed = false;
4166 {
4167 EXCEPTION_MARK;
4168 HandleMark hm(THREAD);
4169 Handle thread_group(THREAD, group);
4170 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4171 if (HAS_PENDING_EXCEPTION) {
4172 CLEAR_PENDING_EXCEPTION;
4173 // cleanup outside the handle mark.
4174 attach_failed = true;
4175 }
4176 }
4177
4178 if (attach_failed) {
4179 // Added missing cleanup
4180 thread->cleanup_failed_attach_current_thread();
4181 return JNI_ERR;
4182 }
4183
4184 // mark the thread as no longer attaching
4185 // this uses a fence to push the change through so we don't have
4186 // to regrab the threads_lock
4187 thread->set_done_attaching_via_jni();
4188
4189 // Set java thread status.
4190 java_lang_Thread::set_thread_status(thread->threadObj(),
4191 java_lang_Thread::RUNNABLE);
4192
4193 // Notify the debugger
4194 if (JvmtiExport::should_post_thread_life()) {
4195 JvmtiExport::post_thread_start(thread);
4196 }
4197
4198 post_thread_start_event(thread);
4199
4200 *(JNIEnv**)penv = thread->jni_environment();
4201
4202 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4203 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4204 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4205 // needed.
4206
4207 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4208
4209 // Perform any platform dependent FPU setup
4210 os::setup_fpu();
4211
4212 return JNI_OK;
4213 }
4214
4215
4216 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4217 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4218 if (vm_created == 0) {
4219 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4220 return JNI_ERR;
4221 }
4222
4223 JNIWrapper("AttachCurrentThread");
4224 jint ret = attach_current_thread(vm, penv, _args, false);
4225 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4226 return ret;
4227 }
4228
4229
4230 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4231 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4232
4233 JNIWrapper("DetachCurrentThread");
4234
4235 // If the thread has already been detached the operation is a no-op
4236 if (Thread::current_or_null() == NULL) {
4237 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4238 return JNI_OK;
4239 }
4240
4241 VM_Exit::block_if_vm_exited();
4242
4243 JavaThread* thread = JavaThread::current();
4244 if (thread->has_last_Java_frame()) {
4245 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4246 // Can't detach a thread that's running java, that can't work.
4247 return JNI_ERR;
4248 }
4249
4250 // Safepoint support. Have to do call-back to safepoint code, if in the
4251 // middle of a safepoint operation
4252 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4253
4254 // XXX: Note that JavaThread::exit() call below removes the guards on the
4255 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4256 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4257 // of the guards is visible in jni_AttachCurrentThread above,
4258 // the removal of the guards is buried below in JavaThread::exit()
4259 // here. The abstraction should be more symmetrically either exposed
4260 // or hidden (e.g. it could probably be hidden in the same
4261 // (platform-dependent) methods where we do alternate stack
4262 // maintenance work?)
4263 thread->exit(false, JavaThread::jni_detach);
4264 thread->smr_delete();
4265
4266 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4267 return JNI_OK;
4268 }
4269
4270 DT_RETURN_MARK_DECL(GetEnv, jint
4271 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4272
4273 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4274 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4275 jint ret = JNI_ERR;
4276 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4277
4278 if (vm_created == 0) {
4279 *penv = NULL;
4280 ret = JNI_EDETACHED;
4281 return ret;
4282 }
4283
4284 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4285 return ret;
4286 }
4287
4288 #ifndef JVMPI_VERSION_1
4289 // need these in order to be polite about older agents
4290 #define JVMPI_VERSION_1 ((jint)0x10000001)
4291 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4292 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4293 #endif // !JVMPI_VERSION_1
4294
4295 Thread* thread = Thread::current_or_null();
4296 if (thread != NULL && thread->is_Java_thread()) {
4297 if (Threads::is_supported_jni_version_including_1_1(version)) {
4298 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4299 ret = JNI_OK;
4300 return ret;
4301
4302 } else if (version == JVMPI_VERSION_1 ||
4303 version == JVMPI_VERSION_1_1 ||
4304 version == JVMPI_VERSION_1_2) {
4305 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4306 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4307 ret = JNI_EVERSION;
4308 return ret;
4309 } else if (JvmtiExport::is_jvmdi_version(version)) {
4310 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4311 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4312 ret = JNI_EVERSION;
4313 return ret;
4314 } else {
4315 *penv = NULL;
4316 ret = JNI_EVERSION;
4317 return ret;
4318 }
4319 } else {
4320 *penv = NULL;
4321 ret = JNI_EDETACHED;
4322 return ret;
4323 }
4324 }
4325
4326
4327 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4328 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4329 if (vm_created == 0) {
4330 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4331 return JNI_ERR;
4332 }
4333
4334 JNIWrapper("AttachCurrentThreadAsDaemon");
4335 jint ret = attach_current_thread(vm, penv, _args, true);
4336 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4337 return ret;
4338 }
4339
4340
4341 } // End extern "C"
4342
4343 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4344 NULL,
4345 NULL,
4346 NULL,
4347
4348 jni_DestroyJavaVM,
4349 jni_AttachCurrentThread,
4350 jni_DetachCurrentThread,
4351 jni_GetEnv,
4352 jni_AttachCurrentThreadAsDaemon
4353 };