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 "memory/allocation.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/access.inline.hpp"
47 #include "oops/arrayOop.inline.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceOop.hpp"
50 #include "oops/markOop.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "oops/typeArrayKlass.hpp"
57 #include "oops/typeArrayOop.inline.hpp"
58 #include "prims/jniCheck.hpp"
59 #include "prims/jniExport.hpp"
60 #include "prims/jniFastGetField.hpp"
61 #include "prims/jvm_misc.hpp"
62 #include "prims/jvmtiExport.hpp"
63 #include "prims/jvmtiThreadState.hpp"
64 #include "runtime/atomic.hpp"
65 #include "runtime/compilationPolicy.hpp"
66 #include "runtime/fieldDescriptor.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/interfaceSupport.inline.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jfieldIDWorkaround.hpp"
72 #include "runtime/jniHandles.inline.hpp"
73 #include "runtime/orderAccess.inline.hpp"
74 #include "runtime/reflection.hpp"
75 #include "runtime/safepointVerifiers.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/signature.hpp"
78 #include "runtime/thread.inline.hpp"
79 #include "runtime/vm_operations.hpp"
80 #include "services/memTracker.hpp"
81 #include "services/runtimeService.hpp"
82 #include "trace/traceMacros.hpp"
83 #include "trace/tracing.hpp"
84 #include "utilities/defaultStream.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/histogram.hpp"
88 #include "utilities/internalVMTests.hpp"
89 #include "utilities/macros.hpp"
90 #include "utilities/vmError.hpp"
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciCompiler.hpp"
93 #include "jvmci/jvmciRuntime.hpp"
94 #endif
95
96 static jint CurrentVersion = JNI_VERSION_10;
97
98 #ifdef _WIN32
99 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
100 #endif
101
102 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
103 // '-return' probe regardless of the return path is taken out of the function.
104 // Methods that have multiple return paths use this to avoid having to
105 // instrument each return path. Methods that use CHECK or THROW must use this
106 // since those macros can cause an immedate uninstrumented return.
107 //
108 // In order to get the return value, a reference to the variable containing
109 // the return value must be passed to the contructor of the object, and
110 // the return value must be set before return (since the mark object has
111 // a reference to it).
112 //
113 // Example:
114 // DT_RETURN_MARK_DECL(SomeFunc, int);
115 // JNI_ENTRY(int, SomeFunc, ...)
116 // int return_value = 0;
117 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
118 // foo(CHECK_0)
119 // return_value = 5;
120 // return return_value;
121 // JNI_END
122 #define DT_RETURN_MARK_DECL(name, type, probe) \
123 DTRACE_ONLY( \
124 class DTraceReturnProbeMark_##name { \
125 public: \
126 const type& _ret_ref; \
127 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
128 ~DTraceReturnProbeMark_##name() { \
129 probe; \
130 } \
131 } \
132 )
133 // Void functions are simpler since there's no return value
134 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
135 DTRACE_ONLY( \
136 class DTraceReturnProbeMark_##name { \
137 public: \
138 ~DTraceReturnProbeMark_##name() { \
139 probe; \
140 } \
141 } \
142 )
143
144 // Place these macros in the function to mark the return. Non-void
145 // functions need the type and address of the return value.
146 #define DT_RETURN_MARK(name, type, ref) \
147 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
148 #define DT_VOID_RETURN_MARK(name) \
149 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
150
151
152 // Use these to select distinct code for floating-point vs. non-floating point
153 // situations. Used from within common macros where we need slightly
154 // different behavior for Float/Double
155 #define FP_SELECT_Boolean(intcode, fpcode) intcode
156 #define FP_SELECT_Byte(intcode, fpcode) intcode
157 #define FP_SELECT_Char(intcode, fpcode) intcode
158 #define FP_SELECT_Short(intcode, fpcode) intcode
159 #define FP_SELECT_Object(intcode, fpcode) intcode
160 #define FP_SELECT_Int(intcode, fpcode) intcode
161 #define FP_SELECT_Long(intcode, fpcode) intcode
162 #define FP_SELECT_Float(intcode, fpcode) fpcode
163 #define FP_SELECT_Double(intcode, fpcode) fpcode
164 #define FP_SELECT(TypeName, intcode, fpcode) \
165 FP_SELECT_##TypeName(intcode, fpcode)
166
167 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
168 // (dtrace doesn't do FP yet)
169 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
170 FP_SELECT(TypeName, \
171 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
172 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
173 FP_SELECT(TypeName, \
174 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
175
176
177 // out-of-line helpers for class jfieldIDWorkaround:
178
179 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
180 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
181 uintptr_t as_uint = (uintptr_t) id;
182 intptr_t offset = raw_instance_offset(id);
183 if (is_checked_jfieldID(id)) {
184 if (!klass_hash_ok(k, id)) {
185 return false;
186 }
187 }
188 return InstanceKlass::cast(k)->contains_field_offset(offset);
189 } else {
190 JNIid* result = (JNIid*) id;
191 #ifdef ASSERT
192 return result != NULL && result->is_static_field_id();
193 #else
194 return result != NULL;
195 #endif
196 }
197 }
198
199
200 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
201 if (offset <= small_offset_mask) {
202 Klass* field_klass = k;
203 Klass* super_klass = field_klass->super();
204 // With compressed oops the most super class with nonstatic fields would
205 // be the owner of fields embedded in the header.
206 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
207 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
208 field_klass = super_klass; // super contains the field also
209 super_klass = field_klass->super();
210 }
211 debug_only(NoSafepointVerifier nosafepoint;)
212 uintptr_t klass_hash = field_klass->identity_hash();
213 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
214 } else {
215 #if 0
216 #ifndef PRODUCT
217 {
218 ResourceMark rm;
219 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
220 }
221 #endif
222 #endif
223 return 0;
224 }
225 }
226
227 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
228 uintptr_t as_uint = (uintptr_t) id;
229 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
230 do {
231 debug_only(NoSafepointVerifier nosafepoint;)
232 // Could use a non-blocking query for identity_hash here...
233 if ((k->identity_hash() & klass_mask) == klass_hash)
234 return true;
235 k = k->super();
236 } while (k != NULL);
237 return false;
238 }
239
240 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
241 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
242 uintptr_t as_uint = (uintptr_t) id;
243 intptr_t offset = raw_instance_offset(id);
244 if (VerifyJNIFields) {
245 if (is_checked_jfieldID(id)) {
246 guarantee(klass_hash_ok(k, id),
247 "Bug in native code: jfieldID class must match object");
248 } else {
249 #if 0
250 #ifndef PRODUCT
251 if (Verbose) {
252 ResourceMark rm;
253 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
254 }
255 #endif
256 #endif
257 }
258 }
259 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
260 "Bug in native code: jfieldID offset must address interior of object");
261 }
262
263 // Wrapper to trace JNI functions
264
265 #ifdef ASSERT
266 Histogram* JNIHistogram;
267 static volatile int JNIHistogram_lock = 0;
268
269 class JNIHistogramElement : public HistogramElement {
270 public:
271 JNIHistogramElement(const char* name);
272 };
273
274 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
275 _name = elementName;
276 uintx count = 0;
277
278 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
279 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
280 count +=1;
281 if ( (WarnOnStalledSpinLock > 0)
282 && (count % WarnOnStalledSpinLock == 0)) {
283 warning("JNIHistogram_lock seems to be stalled");
284 }
285 }
286 }
287
288
289 if(JNIHistogram == NULL)
290 JNIHistogram = new Histogram("JNI Call Counts",100);
291
292 JNIHistogram->add_element(this);
293 Atomic::dec(&JNIHistogram_lock);
294 }
295
296 #define JNICountWrapper(arg) \
297 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
298 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
299 if (e != NULL) e->increment_count()
300 #define JNIWrapper(arg) JNICountWrapper(arg);
301 #else
302 #define JNIWrapper(arg)
303 #endif
304
305
306 // Implementation of JNI entries
307
308 DT_RETURN_MARK_DECL(DefineClass, jclass
309 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
310
311 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
312 const jbyte *buf, jsize bufLen))
313 JNIWrapper("DefineClass");
314
315 HOTSPOT_JNI_DEFINECLASS_ENTRY(
316 env, (char*) name, loaderRef, (char*) buf, bufLen);
317
318 jclass cls = NULL;
319 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
320
321 TempNewSymbol class_name = NULL;
322 // Since exceptions can be thrown, class initialization can take place
323 // if name is NULL no check for class name in .class stream has to be made.
324 if (name != NULL) {
325 const int str_len = (int)strlen(name);
326 if (str_len > Symbol::max_length()) {
327 // It's impossible to create this class; the name cannot fit
328 // into the constant pool.
329 Exceptions::fthrow(THREAD_AND_LOCATION,
330 vmSymbols::java_lang_NoClassDefFoundError(),
331 "Class name exceeds maximum length of %d: %s",
332 Symbol::max_length(),
333 name);
334 return 0;
335 }
336 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
337 }
338 ResourceMark rm(THREAD);
339 ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
340 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
341
342 if (UsePerfData && !class_loader.is_null()) {
343 // check whether the current caller thread holds the lock or not.
344 // If not, increment the corresponding counter
345 if (ObjectSynchronizer::
346 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
347 ObjectSynchronizer::owner_self) {
348 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
349 }
350 }
351 Klass* k = SystemDictionary::resolve_from_stream(class_name,
352 class_loader,
353 Handle(),
354 &st,
355 CHECK_NULL);
356
357 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
358 trace_class_resolution(k);
359 }
360
361 cls = (jclass)JNIHandles::make_local(
362 env, k->java_mirror());
363 return cls;
364 JNI_END
365
366
367
368 static bool first_time_FindClass = true;
369
370 DT_RETURN_MARK_DECL(FindClass, jclass
371 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
372
373 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
374 JNIWrapper("FindClass");
375
376 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
377
378 jclass result = NULL;
379 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
380
381 // Remember if we are the first invocation of jni_FindClass
382 bool first_time = first_time_FindClass;
383 first_time_FindClass = false;
384
385 // Sanity check the name: it cannot be null or larger than the maximum size
386 // name we can fit in the constant pool.
387 if (name == NULL) {
388 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
389 }
390 if ((int)strlen(name) > Symbol::max_length()) {
391 Exceptions::fthrow(THREAD_AND_LOCATION,
392 vmSymbols::java_lang_NoClassDefFoundError(),
393 "Class name exceeds maximum length of %d: %s",
394 Symbol::max_length(),
395 name);
396 return 0;
397 }
398
399 //%note jni_3
400 Handle protection_domain;
401 // Find calling class
402 Klass* k = thread->security_get_caller_class(0);
403 // default to the system loader when no context
404 Handle loader(THREAD, SystemDictionary::java_system_loader());
405 if (k != NULL) {
406 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
407 // in the correct class context.
408 if (k->class_loader() == NULL &&
409 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
410 JavaValue result(T_OBJECT);
411 JavaCalls::call_static(&result, k,
412 vmSymbols::getFromClass_name(),
413 vmSymbols::void_class_signature(),
414 CHECK_NULL);
415 // When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
416 // a non-NULL Class object. When invoked from JNI_OnUnload,
417 // it will return NULL to indicate no context.
418 oop mirror = (oop) result.get_jobject();
419 if (mirror != NULL) {
420 Klass* fromClass = java_lang_Class::as_Klass(mirror);
421 loader = Handle(THREAD, fromClass->class_loader());
422 protection_domain = Handle(THREAD, fromClass->protection_domain());
423 }
424 } else {
425 loader = Handle(THREAD, k->class_loader());
426 }
427 }
428
429 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
430 result = find_class_from_class_loader(env, sym, true, loader,
431 protection_domain, true, thread);
432
433 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
434 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
435 }
436
437 // If we were the first invocation of jni_FindClass, we enable compilation again
438 // rather than just allowing invocation counter to overflow and decay.
439 // Controlled by flag DelayCompilationDuringStartup.
440 if (first_time && !CompileTheWorld)
441 CompilationPolicy::completed_vm_startup();
442
443 return result;
444 JNI_END
445
446 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
447 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
448
449 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
450 JNIWrapper("FromReflectedMethod");
451
452 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
453
454 jmethodID ret = NULL;
455 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
456
457 // method is a handle to a java.lang.reflect.Method object
458 oop reflected = JNIHandles::resolve_non_null(method);
459 oop mirror = NULL;
460 int slot = 0;
461
462 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
463 mirror = java_lang_reflect_Constructor::clazz(reflected);
464 slot = java_lang_reflect_Constructor::slot(reflected);
465 } else {
466 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
467 mirror = java_lang_reflect_Method::clazz(reflected);
468 slot = java_lang_reflect_Method::slot(reflected);
469 }
470 Klass* k1 = java_lang_Class::as_Klass(mirror);
471
472 // Make sure class is initialized before handing id's out to methods
473 k1->initialize(CHECK_NULL);
474 Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
475 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
476 return ret;
477 JNI_END
478
479 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
480 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
481
482 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
483 JNIWrapper("FromReflectedField");
484
485 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
486
487 jfieldID ret = NULL;
488 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
489
490 // field is a handle to a java.lang.reflect.Field object
491 oop reflected = JNIHandles::resolve_non_null(field);
492 oop mirror = java_lang_reflect_Field::clazz(reflected);
493 Klass* k1 = java_lang_Class::as_Klass(mirror);
494 int slot = java_lang_reflect_Field::slot(reflected);
495 int modifiers = java_lang_reflect_Field::modifiers(reflected);
496
497 // Make sure class is initialized before handing id's out to fields
498 k1->initialize(CHECK_NULL);
499
500 // First check if this is a static field
501 if (modifiers & JVM_ACC_STATIC) {
502 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
503 JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
504 assert(id != NULL, "corrupt Field object");
505 debug_only(id->set_is_static_field_id();)
506 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
507 ret = jfieldIDWorkaround::to_static_jfieldID(id);
508 return ret;
509 }
510
511 // The slot is the index of the field description in the field-array
512 // The jfieldID is the offset of the field within the object
513 // It may also have hash bits for k, if VerifyJNIFields is turned on.
514 intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
515 assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
516 ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
517 return ret;
518 JNI_END
519
520
521 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
522 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
523
524 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
525 JNIWrapper("ToReflectedMethod");
526
527 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
528
529 jobject ret = NULL;
530 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
531
532 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
533 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
534 oop reflection_method;
535 if (m->is_initializer()) {
536 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
537 } else {
538 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
539 }
540 ret = JNIHandles::make_local(env, reflection_method);
541 return ret;
542 JNI_END
543
544 DT_RETURN_MARK_DECL(GetSuperclass, jclass
545 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
546
547 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
548 JNIWrapper("GetSuperclass");
549
550 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
551
552 jclass obj = NULL;
553 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
554
555 oop mirror = JNIHandles::resolve_non_null(sub);
556 // primitive classes return NULL
557 if (java_lang_Class::is_primitive(mirror)) return NULL;
558
559 // Rules of Class.getSuperClass as implemented by KLass::java_super:
560 // arrays return Object
561 // interfaces return NULL
562 // proper classes return Klass::super()
563 Klass* k = java_lang_Class::as_Klass(mirror);
564 if (k->is_interface()) return NULL;
565
566 // return mirror for superclass
567 Klass* super = k->java_super();
568 // super2 is the value computed by the compiler's getSuperClass intrinsic:
569 debug_only(Klass* super2 = ( k->is_array_klass()
570 ? SystemDictionary::Object_klass()
571 : k->super() ) );
572 assert(super == super2,
573 "java_super computation depends on interface, array, other super");
574 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
575 return obj;
576 JNI_END
577
578 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
579 JNIWrapper("IsSubclassOf");
580
581 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
582
583 oop sub_mirror = JNIHandles::resolve_non_null(sub);
584 oop super_mirror = JNIHandles::resolve_non_null(super);
585 if (java_lang_Class::is_primitive(sub_mirror) ||
586 java_lang_Class::is_primitive(super_mirror)) {
587 jboolean ret = oopDesc::equals(sub_mirror, super_mirror);
588
589 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
590 return ret;
591 }
592 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
593 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
594 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
595 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
596 JNI_TRUE : JNI_FALSE;
597
598 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
599 return ret;
600 JNI_END
601
602
603 DT_RETURN_MARK_DECL(Throw, jint
604 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
605
606 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
607 JNIWrapper("Throw");
608
609 HOTSPOT_JNI_THROW_ENTRY(env, obj);
610
611 jint ret = JNI_OK;
612 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
613
614 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
615 ShouldNotReachHere();
616 return 0; // Mute compiler.
617 JNI_END
618
619
620 DT_RETURN_MARK_DECL(ThrowNew, jint
621 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
622
623 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
624 JNIWrapper("ThrowNew");
625
626 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
627
628 jint ret = JNI_OK;
629 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
630
631 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
632 Symbol* name = k->name();
633 Handle class_loader (THREAD, k->class_loader());
634 Handle protection_domain (THREAD, k->protection_domain());
635 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
636 ShouldNotReachHere();
637 return 0; // Mute compiler.
638 JNI_END
639
640
641 // JNI functions only transform a pending async exception to a synchronous
642 // exception in ExceptionOccurred and ExceptionCheck calls, since
643 // delivering an async exception in other places won't change the native
644 // code's control flow and would be harmful when native code further calls
645 // JNI functions with a pending exception. Async exception is also checked
646 // during the call, so ExceptionOccurred/ExceptionCheck won't return
647 // false but deliver the async exception at the very end during
648 // state transition.
649
650 static void jni_check_async_exceptions(JavaThread *thread) {
651 assert(thread == Thread::current(), "must be itself");
652 thread->check_and_handle_async_exceptions();
653 }
654
655 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
656 JNIWrapper("ExceptionOccurred");
657
658 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
659
660 jni_check_async_exceptions(thread);
661 oop exception = thread->pending_exception();
662 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
663
664 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
665 return ret;
666 JNI_END
667
668
669 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
670 JNIWrapper("ExceptionDescribe");
671
672 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
673
674 if (thread->has_pending_exception()) {
675 Handle ex(thread, thread->pending_exception());
676 thread->clear_pending_exception();
677 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
678 // Don't print anything if we are being killed.
679 } else {
680 jio_fprintf(defaultStream::error_stream(), "Exception ");
681 if (thread != NULL && thread->threadObj() != NULL) {
682 ResourceMark rm(THREAD);
683 jio_fprintf(defaultStream::error_stream(),
684 "in thread \"%s\" ", thread->get_thread_name());
685 }
686 if (ex->is_a(SystemDictionary::Throwable_klass())) {
687 JavaValue result(T_VOID);
688 JavaCalls::call_virtual(&result,
689 ex,
690 SystemDictionary::Throwable_klass(),
691 vmSymbols::printStackTrace_name(),
692 vmSymbols::void_method_signature(),
693 THREAD);
694 // If an exception is thrown in the call it gets thrown away. Not much
695 // we can do with it. The native code that calls this, does not check
696 // for the exception - hence, it might still be in the thread when DestroyVM gets
697 // called, potentially causing a few asserts to trigger - since no pending exception
698 // is expected.
699 CLEAR_PENDING_EXCEPTION;
700 } else {
701 ResourceMark rm(THREAD);
702 jio_fprintf(defaultStream::error_stream(),
703 ". Uncaught exception of type %s.",
704 ex->klass()->external_name());
705 }
706 }
707 }
708
709 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
710 JNI_END
711
712
713 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
714 JNIWrapper("ExceptionClear");
715
716 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
717
718 // The jni code might be using this API to clear java thrown exception.
719 // So just mark jvmti thread exception state as exception caught.
720 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
721 if (state != NULL && state->is_exception_detected()) {
722 state->set_exception_caught();
723 }
724 thread->clear_pending_exception();
725
726 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
727 JNI_END
728
729
730 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
731 JNIWrapper("FatalError");
732
733 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
734
735 tty->print_cr("FATAL ERROR in native method: %s", msg);
736 thread->print_stack();
737 os::abort(); // Dump core and abort
738 JNI_END
739
740
741 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
742 JNIWrapper("PushLocalFrame");
743
744 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
745
746 //%note jni_11
747 if (capacity < 0 ||
748 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
749 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
750 return JNI_ERR;
751 }
752 JNIHandleBlock* old_handles = thread->active_handles();
753 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
754 assert(new_handles != NULL, "should not be NULL");
755 new_handles->set_pop_frame_link(old_handles);
756 thread->set_active_handles(new_handles);
757 jint ret = JNI_OK;
758 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
759 return ret;
760 JNI_END
761
762
763 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
764 JNIWrapper("PopLocalFrame");
765
766 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
767
768 //%note jni_11
769 Handle result_handle(thread, JNIHandles::resolve(result));
770 JNIHandleBlock* old_handles = thread->active_handles();
771 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
772 if (new_handles != NULL) {
773 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
774 // This way code will still work if PopLocalFrame is called without a corresponding
775 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
776 // the release_block call will release the blocks.
777 thread->set_active_handles(new_handles);
778 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
779 JNIHandleBlock::release_block(old_handles, thread); // may block
780 result = JNIHandles::make_local(thread, result_handle());
781 }
782 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
783 return result;
784 JNI_END
785
786
787 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
788 JNIWrapper("NewGlobalRef");
789
790 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
791
792 Handle ref_handle(thread, JNIHandles::resolve(ref));
793 jobject ret = JNIHandles::make_global(ref_handle);
794
795 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
796 return ret;
797 JNI_END
798
799 // Must be JNI_ENTRY (with HandleMark)
800 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
801 JNIWrapper("DeleteGlobalRef");
802
803 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
804
805 JNIHandles::destroy_global(ref);
806
807 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
808 JNI_END
809
810 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
811 JNIWrapper("DeleteLocalRef");
812
813 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
814
815 JNIHandles::destroy_local(obj);
816
817 HOTSPOT_JNI_DELETELOCALREF_RETURN();
818 JNI_END
819
820 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
821 JNIWrapper("IsSameObject");
822
823 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
824
825 oop a = JNIHandles::resolve(r1);
826 oop b = JNIHandles::resolve(r2);
827 jboolean ret = oopDesc::equals(a, b) ? JNI_TRUE : JNI_FALSE;
828
829 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
830 return ret;
831 JNI_END
832
833
834 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
835 JNIWrapper("NewLocalRef");
836
837 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
838
839 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
840
841 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
842 return ret;
843 JNI_END
844
845 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
846 JNIWrapper("EnsureLocalCapacity");
847
848 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
849
850 jint ret;
851 if (capacity >= 0 &&
852 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
853 ret = JNI_OK;
854 } else {
855 ret = JNI_ERR;
856 }
857
858 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
859 return ret;
860 JNI_END
861
862 // Return the Handle Type
863 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
864 JNIWrapper("GetObjectRefType");
865
866 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
867
868 jobjectRefType ret = JNIInvalidRefType;
869 if (obj != NULL) {
870 ret = JNIHandles::handle_type(thread, obj);
871 }
872
873 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
874 return ret;
875 JNI_END
876
877
878 class JNI_ArgumentPusher : public SignatureIterator {
879 protected:
880 JavaCallArguments* _arguments;
881
882 virtual void get_bool () = 0;
883 virtual void get_char () = 0;
884 virtual void get_short () = 0;
885 virtual void get_byte () = 0;
886 virtual void get_int () = 0;
887 virtual void get_long () = 0;
888 virtual void get_float () = 0;
889 virtual void get_double () = 0;
890 virtual void get_object () = 0;
891
892 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
893 this->_return_type = T_ILLEGAL;
894 _arguments = NULL;
895 }
896
897 public:
898 virtual void iterate( uint64_t fingerprint ) = 0;
899
900 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
901
902 inline void do_bool() { if (!is_return_type()) get_bool(); }
903 inline void do_char() { if (!is_return_type()) get_char(); }
904 inline void do_short() { if (!is_return_type()) get_short(); }
905 inline void do_byte() { if (!is_return_type()) get_byte(); }
906 inline void do_int() { if (!is_return_type()) get_int(); }
907 inline void do_long() { if (!is_return_type()) get_long(); }
908 inline void do_float() { if (!is_return_type()) get_float(); }
909 inline void do_double() { if (!is_return_type()) get_double(); }
910 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
911 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
912 inline void do_void() { }
913
914 JavaCallArguments* arguments() { return _arguments; }
915 void push_receiver(Handle h) { _arguments->push_oop(h); }
916 };
917
918
919 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
920 protected:
921 va_list _ap;
922
923 inline void get_bool() {
924 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
925 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
926 // TemplateInterpreterGenerator::generate_result_handler_for and
927 // SharedRuntime::generate_native_wrapper.
928 jboolean b = va_arg(_ap, jint);
929 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
930 }
931 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
932 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
933 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
934 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
935
936 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
937
938 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
939 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
940 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
941 inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
942
943 inline void set_ap(va_list rap) {
944 va_copy(_ap, rap);
945 }
946
947 public:
948 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
949 : JNI_ArgumentPusher(signature) {
950 set_ap(rap);
951 }
952 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
953 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
954 set_ap(rap);
955 }
956
957 // Optimized path if we have the bitvector form of signature
958 void iterate( uint64_t fingerprint ) {
959 if (fingerprint == (uint64_t)CONST64(-1)) {
960 SignatureIterator::iterate(); // Must be too many arguments
961 } else {
962 _return_type = (BasicType)((fingerprint >> static_feature_size) &
963 result_feature_mask);
964
965 assert(fingerprint, "Fingerprint should not be 0");
966 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
967 while ( 1 ) {
968 switch ( fingerprint & parameter_feature_mask ) {
969 case bool_parm:
970 get_bool();
971 break;
972 case char_parm:
973 get_char();
974 break;
975 case short_parm:
976 get_short();
977 break;
978 case byte_parm:
979 get_byte();
980 break;
981 case int_parm:
982 get_int();
983 break;
984 case obj_parm:
985 get_object();
986 break;
987 case long_parm:
988 get_long();
989 break;
990 case float_parm:
991 get_float();
992 break;
993 case double_parm:
994 get_double();
995 break;
996 case done_parm:
997 return;
998 break;
999 default:
1000 ShouldNotReachHere();
1001 break;
1002 }
1003 fingerprint >>= parameter_feature_size;
1004 }
1005 }
1006 }
1007 };
1008
1009
1010 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1011 protected:
1012 const jvalue *_ap;
1013
1014 inline void get_bool() {
1015 // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1016 // 0 to JNI_FALSE. Boolean return values from native are normalized the same in
1017 // TemplateInterpreterGenerator::generate_result_handler_for and
1018 // SharedRuntime::generate_native_wrapper.
1019 jboolean b = (_ap++)->z;
1020 _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1021 }
1022 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1023 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1024 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1025 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1026
1027 inline void get_long() { _arguments->push_long((_ap++)->j); }
1028 inline void get_float() { _arguments->push_float((_ap++)->f); }
1029 inline void get_double() { _arguments->push_double((_ap++)->d);}
1030 inline void get_object() { _arguments->push_jobject((_ap++)->l); }
1031
1032 inline void set_ap(const jvalue *rap) { _ap = rap; }
1033
1034 public:
1035 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1036 : JNI_ArgumentPusher(signature) {
1037 set_ap(rap);
1038 }
1039 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1040 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1041 set_ap(rap);
1042 }
1043
1044 // Optimized path if we have the bitvector form of signature
1045 void iterate( uint64_t fingerprint ) {
1046 if (fingerprint == (uint64_t)CONST64(-1)) {
1047 SignatureIterator::iterate(); // Must be too many arguments
1048 } else {
1049 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1050 result_feature_mask);
1051 assert(fingerprint, "Fingerprint should not be 0");
1052 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1053 while ( 1 ) {
1054 switch ( fingerprint & parameter_feature_mask ) {
1055 case bool_parm:
1056 get_bool();
1057 break;
1058 case char_parm:
1059 get_char();
1060 break;
1061 case short_parm:
1062 get_short();
1063 break;
1064 case byte_parm:
1065 get_byte();
1066 break;
1067 case int_parm:
1068 get_int();
1069 break;
1070 case obj_parm:
1071 get_object();
1072 break;
1073 case long_parm:
1074 get_long();
1075 break;
1076 case float_parm:
1077 get_float();
1078 break;
1079 case double_parm:
1080 get_double();
1081 break;
1082 case done_parm:
1083 return;
1084 break;
1085 default:
1086 ShouldNotReachHere();
1087 break;
1088 }
1089 fingerprint >>= parameter_feature_size;
1090 }
1091 }
1092 }
1093 };
1094
1095
1096 enum JNICallType {
1097 JNI_STATIC,
1098 JNI_VIRTUAL,
1099 JNI_NONVIRTUAL
1100 };
1101
1102
1103
1104 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1105 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1106
1107 // Create object to hold arguments for the JavaCall, and associate it with
1108 // the jni parser
1109 ResourceMark rm(THREAD);
1110 int number_of_parameters = method->size_of_parameters();
1111 JavaCallArguments java_args(number_of_parameters);
1112 args->set_java_argument_object(&java_args);
1113
1114 assert(method->is_static(), "method should be static");
1115
1116 // Fill out JavaCallArguments object
1117 args->iterate( Fingerprinter(method).fingerprint() );
1118 // Initialize result type
1119 result->set_type(args->get_ret_type());
1120
1121 // Invoke the method. Result is returned as oop.
1122 JavaCalls::call(result, method, &java_args, CHECK);
1123
1124 // Convert result
1125 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1126 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1127 }
1128 }
1129
1130
1131 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1132 oop recv = JNIHandles::resolve(receiver);
1133 if (recv == NULL) {
1134 THROW(vmSymbols::java_lang_NullPointerException());
1135 }
1136 Handle h_recv(THREAD, recv);
1137
1138 int number_of_parameters;
1139 Method* selected_method;
1140 {
1141 Method* m = Method::resolve_jmethod_id(method_id);
1142 number_of_parameters = m->size_of_parameters();
1143 Klass* holder = m->method_holder();
1144 if (call_type != JNI_VIRTUAL) {
1145 selected_method = m;
1146 } else if (!m->has_itable_index()) {
1147 // non-interface call -- for that little speed boost, don't handlize
1148 debug_only(NoSafepointVerifier nosafepoint;)
1149 // jni_GetMethodID makes sure class is linked and initialized
1150 // so m should have a valid vtable index.
1151 assert(m->valid_vtable_index(), "no valid vtable index");
1152 int vtbl_index = m->vtable_index();
1153 if (vtbl_index != Method::nonvirtual_vtable_index) {
1154 selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1155 } else {
1156 // final method
1157 selected_method = m;
1158 }
1159 } else {
1160 // interface call
1161 int itbl_index = m->itable_index();
1162 Klass* k = h_recv->klass();
1163 selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
1164 }
1165 }
1166
1167 methodHandle method(THREAD, selected_method);
1168
1169 // Create object to hold arguments for the JavaCall, and associate it with
1170 // the jni parser
1171 ResourceMark rm(THREAD);
1172 JavaCallArguments java_args(number_of_parameters);
1173 args->set_java_argument_object(&java_args);
1174
1175 // handle arguments
1176 assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
1177 args->push_receiver(h_recv); // Push jobject handle
1178
1179 // Fill out JavaCallArguments object
1180 args->iterate( Fingerprinter(method).fingerprint() );
1181 // Initialize result type
1182 result->set_type(args->get_ret_type());
1183
1184 // Invoke the method. Result is returned as oop.
1185 JavaCalls::call(result, method, &java_args, CHECK);
1186
1187 // Convert result
1188 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1189 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1190 }
1191 }
1192
1193
1194 static instanceOop alloc_object(jclass clazz, TRAPS) {
1195 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1196 if (k == NULL) {
1197 ResourceMark rm(THREAD);
1198 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1199 }
1200 k->check_valid_for_instantiation(false, CHECK_NULL);
1201 k->initialize(CHECK_NULL);
1202 instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
1203 return ih;
1204 }
1205
1206 DT_RETURN_MARK_DECL(AllocObject, jobject
1207 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1208
1209 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1210 JNIWrapper("AllocObject");
1211
1212 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1213
1214 jobject ret = NULL;
1215 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1216
1217 instanceOop i = alloc_object(clazz, CHECK_NULL);
1218 ret = JNIHandles::make_local(env, i);
1219 return ret;
1220 JNI_END
1221
1222 DT_RETURN_MARK_DECL(NewObjectA, jobject
1223 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1224
1225 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1226 JNIWrapper("NewObjectA");
1227
1228 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1229
1230 jobject obj = NULL;
1231 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1232
1233 instanceOop i = alloc_object(clazz, CHECK_NULL);
1234 obj = JNIHandles::make_local(env, i);
1235 JavaValue jvalue(T_VOID);
1236 JNI_ArgumentPusherArray ap(methodID, args);
1237 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1238 return obj;
1239 JNI_END
1240
1241
1242 DT_RETURN_MARK_DECL(NewObjectV, jobject
1243 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1244
1245 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1246 JNIWrapper("NewObjectV");
1247
1248 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1249
1250 jobject obj = NULL;
1251 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1252
1253 instanceOop i = alloc_object(clazz, CHECK_NULL);
1254 obj = JNIHandles::make_local(env, i);
1255 JavaValue jvalue(T_VOID);
1256 JNI_ArgumentPusherVaArg ap(methodID, args);
1257 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1258 return obj;
1259 JNI_END
1260
1261
1262 DT_RETURN_MARK_DECL(NewObject, jobject
1263 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1264
1265 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1266 JNIWrapper("NewObject");
1267
1268 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1269
1270 jobject obj = NULL;
1271 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1272
1273 instanceOop i = alloc_object(clazz, CHECK_NULL);
1274 obj = JNIHandles::make_local(env, i);
1275 va_list args;
1276 va_start(args, methodID);
1277 JavaValue jvalue(T_VOID);
1278 JNI_ArgumentPusherVaArg ap(methodID, args);
1279 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1280 va_end(args);
1281 return obj;
1282 JNI_END
1283
1284
1285 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1286 JNIWrapper("GetObjectClass");
1287
1288 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1289
1290 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1291 jclass ret =
1292 (jclass) JNIHandles::make_local(env, k->java_mirror());
1293
1294 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1295 return ret;
1296 JNI_END
1297
1298 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1299 JNIWrapper("IsInstanceOf");
1300
1301 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1302
1303 jboolean ret = JNI_TRUE;
1304 if (obj != NULL) {
1305 ret = JNI_FALSE;
1306 Klass* k = java_lang_Class::as_Klass(
1307 JNIHandles::resolve_non_null(clazz));
1308 if (k != NULL) {
1309 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1310 }
1311 }
1312
1313 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1314 return ret;
1315 JNI_END
1316
1317
1318 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1319 const char *sig, bool is_static, TRAPS) {
1320 // %%%% This code should probably just call into a method in the LinkResolver
1321 //
1322 // The class should have been loaded (we have an instance of the class
1323 // passed in) so the method and signature should already be in the symbol
1324 // table. If they're not there, the method doesn't exist.
1325 const char *name_to_probe = (name_str == NULL)
1326 ? vmSymbols::object_initializer_name()->as_C_string()
1327 : name_str;
1328 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1329 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1330
1331 if (name == NULL || signature == NULL) {
1332 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1333 }
1334
1335 // Throw a NoSuchMethodError exception if we have an instance of a
1336 // primitive java.lang.Class
1337 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1338 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1339 }
1340
1341 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1342
1343 // Make sure class is linked and initialized before handing id's out to
1344 // Method*s.
1345 klass->initialize(CHECK_NULL);
1346
1347 Method* m;
1348 if (name == vmSymbols::object_initializer_name() ||
1349 name == vmSymbols::class_initializer_name()) {
1350 // Never search superclasses for constructors
1351 if (klass->is_instance_klass()) {
1352 m = InstanceKlass::cast(klass)->find_method(name, signature);
1353 } else {
1354 m = NULL;
1355 }
1356 } else {
1357 m = klass->lookup_method(name, signature);
1358 if (m == NULL && klass->is_instance_klass()) {
1359 m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
1360 }
1361 }
1362 if (m == NULL || (m->is_static() != is_static)) {
1363 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1364 }
1365 return m->jmethod_id();
1366 }
1367
1368
1369 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1370 const char *name, const char *sig))
1371 JNIWrapper("GetMethodID");
1372 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1373 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1374 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1375 return ret;
1376 JNI_END
1377
1378
1379 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1380 const char *name, const char *sig))
1381 JNIWrapper("GetStaticMethodID");
1382 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1383 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1384 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1385 return ret;
1386 JNI_END
1387
1388
1389
1390 //
1391 // Calling Methods
1392 //
1393
1394
1395 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1396 , EntryProbe, ReturnProbe) \
1397 \
1398 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1399 , ReturnProbe); \
1400 \
1401 JNI_ENTRY(ResultType, \
1402 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1403 JNIWrapper("Call" XSTR(Result) "Method"); \
1404 \
1405 EntryProbe; \
1406 ResultType ret = 0;\
1407 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1408 (const ResultType&)ret);\
1409 \
1410 va_list args; \
1411 va_start(args, methodID); \
1412 JavaValue jvalue(Tag); \
1413 JNI_ArgumentPusherVaArg ap(methodID, args); \
1414 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1415 va_end(args); \
1416 ret = jvalue.get_##ResultType(); \
1417 return ret;\
1418 JNI_END
1419
1420 // the runtime type of subword integral basic types is integer
1421 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1422 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1424 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1425 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1428 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1430 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1431 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1433
1434 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1435 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jint, Int, T_INT,
1438 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1441 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1443 // Float and double probes don't return value because dtrace doesn't currently support it
1444 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1445 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1447 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1448 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1450
1451 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1452 , EntryProbe, ReturnProbe) \
1453 \
1454 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1455 , ReturnProbe); \
1456 \
1457 JNI_ENTRY(ResultType, \
1458 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1459 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1460 \
1461 EntryProbe;\
1462 ResultType ret = 0;\
1463 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1464 (const ResultType&)ret);\
1465 \
1466 JavaValue jvalue(Tag); \
1467 JNI_ArgumentPusherVaArg ap(methodID, args); \
1468 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1469 ret = jvalue.get_##ResultType(); \
1470 return ret;\
1471 JNI_END
1472
1473 // the runtime type of subword integral basic types is integer
1474 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1475 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1478 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1481 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1483 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1484 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1486
1487 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1488 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jint, Int, T_INT,
1491 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1494 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1496 // Float and double probes don't return value because dtrace doesn't currently support it
1497 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1498 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1500 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1501 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1503
1504 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1505 , EntryProbe, ReturnProbe) \
1506 \
1507 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1508 , ReturnProbe); \
1509 \
1510 JNI_ENTRY(ResultType, \
1511 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1512 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1513 EntryProbe; \
1514 ResultType ret = 0;\
1515 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1516 (const ResultType&)ret);\
1517 \
1518 JavaValue jvalue(Tag); \
1519 JNI_ArgumentPusherArray ap(methodID, args); \
1520 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1521 ret = jvalue.get_##ResultType(); \
1522 return ret;\
1523 JNI_END
1524
1525 // the runtime type of subword integral basic types is integer
1526 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1527 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1530 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1533 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1535 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1536 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1538
1539 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1540 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jint, Int, T_INT,
1543 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1546 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1548 // Float and double probes don't return value because dtrace doesn't currently support it
1549 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1550 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1552 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1553 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1555
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1557 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1558 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1559
1560
1561 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1562 JNIWrapper("CallVoidMethod");
1563 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1564 DT_VOID_RETURN_MARK(CallVoidMethod);
1565
1566 va_list args;
1567 va_start(args, methodID);
1568 JavaValue jvalue(T_VOID);
1569 JNI_ArgumentPusherVaArg ap(methodID, args);
1570 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1571 va_end(args);
1572 JNI_END
1573
1574
1575 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1576 JNIWrapper("CallVoidMethodV");
1577 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1578 DT_VOID_RETURN_MARK(CallVoidMethodV);
1579
1580 JavaValue jvalue(T_VOID);
1581 JNI_ArgumentPusherVaArg ap(methodID, args);
1582 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1583 JNI_END
1584
1585
1586 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1587 JNIWrapper("CallVoidMethodA");
1588 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1589 DT_VOID_RETURN_MARK(CallVoidMethodA);
1590
1591 JavaValue jvalue(T_VOID);
1592 JNI_ArgumentPusherArray ap(methodID, args);
1593 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1594 JNI_END
1595
1596
1597
1598 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1599 , EntryProbe, ReturnProbe) \
1600 \
1601 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1602 , ReturnProbe);\
1603 \
1604 JNI_ENTRY(ResultType, \
1605 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1606 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1607 \
1608 EntryProbe;\
1609 ResultType ret;\
1610 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1611 (const ResultType&)ret);\
1612 \
1613 va_list args; \
1614 va_start(args, methodID); \
1615 JavaValue jvalue(Tag); \
1616 JNI_ArgumentPusherVaArg ap(methodID, args); \
1617 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1618 va_end(args); \
1619 ret = jvalue.get_##ResultType(); \
1620 return ret;\
1621 JNI_END
1622
1623 // the runtime type of subword integral basic types is integer
1624 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1625 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1628 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1631 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1634 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1636
1637 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1638 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1641 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1644 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645 // Float and double probes don't return value because dtrace doesn't currently support it
1646 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1647 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1648 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1650 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1651 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1653
1654 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1655 , EntryProbe, ReturnProbe) \
1656 \
1657 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1658 , ReturnProbe);\
1659 \
1660 JNI_ENTRY(ResultType, \
1661 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1662 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1663 \
1664 EntryProbe;\
1665 ResultType ret;\
1666 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1667 (const ResultType&)ret);\
1668 \
1669 JavaValue jvalue(Tag); \
1670 JNI_ArgumentPusherVaArg ap(methodID, args); \
1671 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1672 ret = jvalue.get_##ResultType(); \
1673 return ret;\
1674 JNI_END
1675
1676 // the runtime type of subword integral basic types is integer
1677 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1678 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1681 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1684 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1687 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1689
1690 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1691 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1694 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1697 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698 // Float and double probes don't return value because dtrace doesn't currently support it
1699 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1700 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1701 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1703 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1704 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1706
1707 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1708 , EntryProbe, ReturnProbe) \
1709 \
1710 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1711 , ReturnProbe);\
1712 \
1713 JNI_ENTRY(ResultType, \
1714 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1715 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1716 \
1717 EntryProbe;\
1718 ResultType ret;\
1719 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1720 (const ResultType&)ret);\
1721 \
1722 JavaValue jvalue(Tag); \
1723 JNI_ArgumentPusherArray ap(methodID, args); \
1724 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1725 ret = jvalue.get_##ResultType(); \
1726 return ret;\
1727 JNI_END
1728
1729 // the runtime type of subword integral basic types is integer
1730 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1731 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1734 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1737 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1740 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1742
1743 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1744 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1747 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1750 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751 // Float and double probes don't return value because dtrace doesn't currently support it
1752 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1753 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1754 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1756 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1757 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1759
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1761 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1763 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1764 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1765 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1766
1767 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1768 JNIWrapper("CallNonvirtualVoidMethod");
1769
1770 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1771 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1772
1773 va_list args;
1774 va_start(args, methodID);
1775 JavaValue jvalue(T_VOID);
1776 JNI_ArgumentPusherVaArg ap(methodID, args);
1777 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1778 va_end(args);
1779 JNI_END
1780
1781
1782 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1783 JNIWrapper("CallNonvirtualVoidMethodV");
1784
1785 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1786 env, obj, cls, (uintptr_t) methodID);
1787 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1788
1789 JavaValue jvalue(T_VOID);
1790 JNI_ArgumentPusherVaArg ap(methodID, args);
1791 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1792 JNI_END
1793
1794
1795 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1796 JNIWrapper("CallNonvirtualVoidMethodA");
1797 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1798 env, obj, cls, (uintptr_t) methodID);
1799 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1800 JavaValue jvalue(T_VOID);
1801 JNI_ArgumentPusherArray ap(methodID, args);
1802 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1803 JNI_END
1804
1805
1806
1807 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1808 , EntryProbe, ResultProbe) \
1809 \
1810 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1811 , ResultProbe); \
1812 \
1813 JNI_ENTRY(ResultType, \
1814 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1815 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1816 \
1817 EntryProbe; \
1818 ResultType ret = 0;\
1819 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1820 (const ResultType&)ret);\
1821 \
1822 va_list args; \
1823 va_start(args, methodID); \
1824 JavaValue jvalue(Tag); \
1825 JNI_ArgumentPusherVaArg ap(methodID, args); \
1826 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1827 va_end(args); \
1828 ret = jvalue.get_##ResultType(); \
1829 return ret;\
1830 JNI_END
1831
1832 // the runtime type of subword integral basic types is integer
1833 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1834 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1836 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1837 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1840 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1842 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1843 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1845
1846 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1847 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1850 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1853 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1855 // Float and double probes don't return value because dtrace doesn't currently support it
1856 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1857 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1859 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1860 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1862
1863 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1864 , EntryProbe, ResultProbe) \
1865 \
1866 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1867 , ResultProbe); \
1868 \
1869 JNI_ENTRY(ResultType, \
1870 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1871 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1872 \
1873 EntryProbe; \
1874 ResultType ret = 0;\
1875 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1876 (const ResultType&)ret);\
1877 \
1878 JavaValue jvalue(Tag); \
1879 JNI_ArgumentPusherVaArg ap(methodID, args); \
1880 /* Make sure class is initialized before trying to invoke its method */ \
1881 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
1882 k->initialize(CHECK_0); \
1883 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1884 va_end(args); \
1885 ret = jvalue.get_##ResultType(); \
1886 return ret;\
1887 JNI_END
1888
1889 // the runtime type of subword integral basic types is integer
1890 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1891 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1894 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1897 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1899 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1900 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1902
1903 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1904 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1907 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1910 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1912 // Float and double probes don't return value because dtrace doesn't currently support it
1913 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1914 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1916 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1917 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1919
1920 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1921 , EntryProbe, ResultProbe) \
1922 \
1923 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1924 , ResultProbe); \
1925 \
1926 JNI_ENTRY(ResultType, \
1927 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1928 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1929 \
1930 EntryProbe; \
1931 ResultType ret = 0;\
1932 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1933 (const ResultType&)ret);\
1934 \
1935 JavaValue jvalue(Tag); \
1936 JNI_ArgumentPusherArray ap(methodID, args); \
1937 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1938 ret = jvalue.get_##ResultType(); \
1939 return ret;\
1940 JNI_END
1941
1942 // the runtime type of subword integral basic types is integer
1943 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1944 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1946 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1947 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1950 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1953 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1955
1956 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1957 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1960 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1963 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1965 // Float and double probes don't return value because dtrace doesn't currently support it
1966 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1967 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1969 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1970 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1972
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1974 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1976 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1977 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1978 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1979
1980 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1981 JNIWrapper("CallStaticVoidMethod");
1982 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1983 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1984
1985 va_list args;
1986 va_start(args, methodID);
1987 JavaValue jvalue(T_VOID);
1988 JNI_ArgumentPusherVaArg ap(methodID, args);
1989 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1990 va_end(args);
1991 JNI_END
1992
1993
1994 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1995 JNIWrapper("CallStaticVoidMethodV");
1996 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1997 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1998
1999 JavaValue jvalue(T_VOID);
2000 JNI_ArgumentPusherVaArg ap(methodID, args);
2001 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2002 JNI_END
2003
2004
2005 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2006 JNIWrapper("CallStaticVoidMethodA");
2007 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2008 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2009
2010 JavaValue jvalue(T_VOID);
2011 JNI_ArgumentPusherArray ap(methodID, args);
2012 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2013 JNI_END
2014
2015
2016 //
2017 // Accessing Fields
2018 //
2019
2020
2021 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2022 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2023
2024 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2025 const char *name, const char *sig))
2026 JNIWrapper("GetFieldID");
2027 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2028 jfieldID ret = 0;
2029 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2030
2031 // The class should have been loaded (we have an instance of the class
2032 // passed in) so the field and signature should already be in the symbol
2033 // table. If they're not there, the field doesn't exist.
2034 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2035 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2036 if (fieldname == NULL || signame == NULL) {
2037 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2038 }
2039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2040 // Make sure class is initialized before handing id's out to fields
2041 k->initialize(CHECK_NULL);
2042
2043 fieldDescriptor fd;
2044 if (!k->is_instance_klass() ||
2045 !InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
2046 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2047 }
2048
2049 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2050 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2051 ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
2052 return ret;
2053 JNI_END
2054
2055
2056 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2057 JNIWrapper("GetObjectField");
2058 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2059 oop o = JNIHandles::resolve_non_null(obj);
2060 Klass* k = o->klass();
2061 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2062 // Keep JVMTI addition small and only check enabled flag here.
2063 // jni_GetField_probe() assumes that is okay to create handles.
2064 if (JvmtiExport::should_post_field_access()) {
2065 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2066 }
2067 oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
2068 jobject ret = JNIHandles::make_local(env, loaded_obj);
2069 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2070 return ret;
2071 JNI_END
2072
2073
2074
2075 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2076 , EntryProbe, ReturnProbe) \
2077 \
2078 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2079 , ReturnProbe); \
2080 \
2081 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2082 JNIWrapper("Get" XSTR(Result) "Field"); \
2083 \
2084 EntryProbe; \
2085 Return ret = 0;\
2086 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2087 \
2088 oop o = JNIHandles::resolve_non_null(obj); \
2089 Klass* k = o->klass(); \
2090 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2091 /* Keep JVMTI addition small and only check enabled flag here. */ \
2092 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2093 /* and creates a ResetNoHandleMark. */ \
2094 if (JvmtiExport::should_post_field_access()) { \
2095 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2096 } \
2097 ret = o->Fieldname##_field(offset); \
2098 return ret; \
2099 JNI_END
2100
2101 DEFINE_GETFIELD(jboolean, bool, Boolean
2102 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2103 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2104 DEFINE_GETFIELD(jbyte, byte, Byte
2105 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2106 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2107 DEFINE_GETFIELD(jchar, char, Char
2108 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2109 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2110 DEFINE_GETFIELD(jshort, short, Short
2111 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2112 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2113 DEFINE_GETFIELD(jint, int, Int
2114 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2115 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2116 DEFINE_GETFIELD(jlong, long, Long
2117 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2118 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2119 // Float and double probes don't return value because dtrace doesn't currently support it
2120 DEFINE_GETFIELD(jfloat, float, Float
2121 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2122 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2123 DEFINE_GETFIELD(jdouble, double, Double
2124 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2125 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2126
2127 address jni_GetBooleanField_addr() {
2128 return (address)jni_GetBooleanField;
2129 }
2130 address jni_GetByteField_addr() {
2131 return (address)jni_GetByteField;
2132 }
2133 address jni_GetCharField_addr() {
2134 return (address)jni_GetCharField;
2135 }
2136 address jni_GetShortField_addr() {
2137 return (address)jni_GetShortField;
2138 }
2139 address jni_GetIntField_addr() {
2140 return (address)jni_GetIntField;
2141 }
2142 address jni_GetLongField_addr() {
2143 return (address)jni_GetLongField;
2144 }
2145 address jni_GetFloatField_addr() {
2146 return (address)jni_GetFloatField;
2147 }
2148 address jni_GetDoubleField_addr() {
2149 return (address)jni_GetDoubleField;
2150 }
2151
2152 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2153 JNIWrapper("SetObjectField");
2154 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2155 oop o = JNIHandles::resolve_non_null(obj);
2156 Klass* k = o->klass();
2157 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2158 // Keep JVMTI addition small and only check enabled flag here.
2159 // jni_SetField_probe_nh() assumes that is not okay to create handles
2160 // and creates a ResetNoHandleMark.
2161 if (JvmtiExport::should_post_field_modification()) {
2162 jvalue field_value;
2163 field_value.l = value;
2164 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2165 }
2166 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
2167 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2168 JNI_END
2169
2170
2171 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2172 , EntryProbe, ReturnProbe) \
2173 \
2174 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2175 JNIWrapper("Set" XSTR(Result) "Field"); \
2176 \
2177 EntryProbe; \
2178 \
2179 oop o = JNIHandles::resolve_non_null(obj); \
2180 Klass* k = o->klass(); \
2181 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2182 /* Keep JVMTI addition small and only check enabled flag here. */ \
2183 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2184 /* and creates a ResetNoHandleMark. */ \
2185 if (JvmtiExport::should_post_field_modification()) { \
2186 jvalue field_value; \
2187 field_value.unionType = value; \
2188 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2189 } \
2190 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2191 o->Fieldname##_field_put(offset, value); \
2192 ReturnProbe; \
2193 JNI_END
2194
2195 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2196 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2197 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2198 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2199 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2200 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2201 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2202 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2203 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2204 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2205 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2206 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2207 DEFINE_SETFIELD(jint, int, Int, 'I', i
2208 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2209 HOTSPOT_JNI_SETINTFIELD_RETURN())
2210 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2211 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2212 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2213 // Float and double probes don't return value because dtrace doesn't currently support it
2214 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2215 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2216 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2217 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2218 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2219 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2220
2221 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2222 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2223
2224 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2225 JNIWrapper("ToReflectedField");
2226 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2227 jobject ret = NULL;
2228 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2229
2230 fieldDescriptor fd;
2231 bool found = false;
2232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2233
2234 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2235
2236 if (isStatic) {
2237 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2238 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2239 assert(id->is_static_field_id(), "invalid static field id");
2240 found = id->find_local_field(&fd);
2241 } else {
2242 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2243 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2244 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2245 }
2246 assert(found, "bad fieldID passed into jni_ToReflectedField");
2247 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2248 ret = JNIHandles::make_local(env, reflected);
2249 return ret;
2250 JNI_END
2251
2252
2253 //
2254 // Accessing Static Fields
2255 //
2256 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2257 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2258
2259 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2260 const char *name, const char *sig))
2261 JNIWrapper("GetStaticFieldID");
2262 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2263 jfieldID ret = NULL;
2264 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2265
2266 // The class should have been loaded (we have an instance of the class
2267 // passed in) so the field and signature should already be in the symbol
2268 // table. If they're not there, the field doesn't exist.
2269 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2270 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2271 if (fieldname == NULL || signame == NULL) {
2272 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2273 }
2274 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2275 // Make sure class is initialized before handing id's out to static fields
2276 k->initialize(CHECK_NULL);
2277
2278 fieldDescriptor fd;
2279 if (!k->is_instance_klass() ||
2280 !InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
2281 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2282 }
2283
2284 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2285 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2286 debug_only(id->set_is_static_field_id();)
2287
2288 debug_only(id->verify(fd.field_holder()));
2289
2290 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2291 return ret;
2292 JNI_END
2293
2294
2295 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2296 JNIWrapper("GetStaticObjectField");
2297 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2298 #if INCLUDE_JNI_CHECK
2299 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2300 #endif // INCLUDE_JNI_CHECK
2301 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2302 assert(id->is_static_field_id(), "invalid static field id");
2303 // Keep JVMTI addition small and only check enabled flag here.
2304 // jni_GetField_probe() assumes that is okay to create handles.
2305 if (JvmtiExport::should_post_field_access()) {
2306 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2307 }
2308 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2309 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2310 return ret;
2311 JNI_END
2312
2313
2314 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2315 , EntryProbe, ReturnProbe) \
2316 \
2317 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2318 , ReturnProbe); \
2319 \
2320 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2321 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2322 EntryProbe; \
2323 Return ret = 0;\
2324 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2325 (const Return&)ret);\
2326 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2327 assert(id->is_static_field_id(), "invalid static field id"); \
2328 /* Keep JVMTI addition small and only check enabled flag here. */ \
2329 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2330 if (JvmtiExport::should_post_field_access()) { \
2331 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2332 } \
2333 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2334 return ret;\
2335 JNI_END
2336
2337 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2338 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2339 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2340 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2341 DEFINE_GETSTATICFIELD(jchar, char, Char
2342 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2343 DEFINE_GETSTATICFIELD(jshort, short, Short
2344 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2345 DEFINE_GETSTATICFIELD(jint, int, Int
2346 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2347 DEFINE_GETSTATICFIELD(jlong, long, Long
2348 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2349 // Float and double probes don't return value because dtrace doesn't currently support it
2350 DEFINE_GETSTATICFIELD(jfloat, float, Float
2351 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2352 DEFINE_GETSTATICFIELD(jdouble, double, Double
2353 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2354
2355 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2356 JNIWrapper("SetStaticObjectField");
2357 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2358 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2359 assert(id->is_static_field_id(), "invalid static field id");
2360 // Keep JVMTI addition small and only check enabled flag here.
2361 // jni_SetField_probe() assumes that is okay to create handles.
2362 if (JvmtiExport::should_post_field_modification()) {
2363 jvalue field_value;
2364 field_value.l = value;
2365 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2366 }
2367 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2368 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2369 JNI_END
2370
2371
2372
2373 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2374 , EntryProbe, ReturnProbe) \
2375 \
2376 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2377 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2378 EntryProbe; \
2379 \
2380 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2381 assert(id->is_static_field_id(), "invalid static field id"); \
2382 /* Keep JVMTI addition small and only check enabled flag here. */ \
2383 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2384 if (JvmtiExport::should_post_field_modification()) { \
2385 jvalue field_value; \
2386 field_value.unionType = value; \
2387 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2388 } \
2389 if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2390 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2391 ReturnProbe;\
2392 JNI_END
2393
2394 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2395 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2396 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2397 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2398 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2399 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2400 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2401 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2402 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2403 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2404 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2405 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2406 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2407 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2408 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2409 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2410 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2411 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2412 // Float and double probes don't return value because dtrace doesn't currently support it
2413 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2414 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2415 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2416 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2417 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2418 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2419
2420 //
2421 // String Operations
2422 //
2423
2424 // Unicode Interface
2425
2426 DT_RETURN_MARK_DECL(NewString, jstring
2427 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2428
2429 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2430 JNIWrapper("NewString");
2431 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2432 jstring ret = NULL;
2433 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2434 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2435 ret = (jstring) JNIHandles::make_local(env, string);
2436 return ret;
2437 JNI_END
2438
2439
2440 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2441 JNIWrapper("GetStringLength");
2442 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2443 jsize ret = 0;
2444 oop s = JNIHandles::resolve_non_null(string);
2445 if (java_lang_String::value(s) != NULL) {
2446 ret = java_lang_String::length(s);
2447 }
2448 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2449 return ret;
2450 JNI_END
2451
2452
2453 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2454 JNIEnv *env, jstring string, jboolean *isCopy))
2455 JNIWrapper("GetStringChars");
2456 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2457 jchar* buf = NULL;
2458 oop s = JNIHandles::resolve_non_null(string);
2459 typeArrayOop s_value = java_lang_String::value(s);
2460 if (s_value != NULL) {
2461 int s_len = java_lang_String::length(s);
2462 bool is_latin1 = java_lang_String::is_latin1(s);
2463 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2464 /* JNI Specification states return NULL on OOM */
2465 if (buf != NULL) {
2466 if (s_len > 0) {
2467 if (!is_latin1) {
2468 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2469 } else {
2470 for (int i = 0; i < s_len; i++) {
2471 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2472 }
2473 }
2474 }
2475 buf[s_len] = 0;
2476 //%note jni_5
2477 if (isCopy != NULL) {
2478 *isCopy = JNI_TRUE;
2479 }
2480 }
2481 }
2482 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2483 return buf;
2484 JNI_END
2485
2486
2487 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2488 JNIWrapper("ReleaseStringChars");
2489 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2490 //%note jni_6
2491 if (chars != NULL) {
2492 // Since String objects are supposed to be immutable, don't copy any
2493 // new data back. A bad user will have to go after the char array.
2494 FreeHeap((void*) chars);
2495 }
2496 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2497 JNI_END
2498
2499
2500 // UTF Interface
2501
2502 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2503 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2504
2505 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2506 JNIWrapper("NewStringUTF");
2507 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2508 jstring ret;
2509 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2510
2511 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2512 ret = (jstring) JNIHandles::make_local(env, result);
2513 return ret;
2514 JNI_END
2515
2516
2517 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2518 JNIWrapper("GetStringUTFLength");
2519 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2520 jsize ret = 0;
2521 oop java_string = JNIHandles::resolve_non_null(string);
2522 if (java_lang_String::value(java_string) != NULL) {
2523 ret = java_lang_String::utf8_length(java_string);
2524 }
2525 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2526 return ret;
2527 JNI_END
2528
2529
2530 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2531 JNIWrapper("GetStringUTFChars");
2532 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2533 char* result = NULL;
2534 oop java_string = JNIHandles::resolve_non_null(string);
2535 if (java_lang_String::value(java_string) != NULL) {
2536 size_t length = java_lang_String::utf8_length(java_string);
2537 /* JNI Specification states return NULL on OOM */
2538 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2539 if (result != NULL) {
2540 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2541 if (isCopy != NULL) {
2542 *isCopy = JNI_TRUE;
2543 }
2544 }
2545 }
2546 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2547 return result;
2548 JNI_END
2549
2550
2551 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2552 JNIWrapper("ReleaseStringUTFChars");
2553 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2554 if (chars != NULL) {
2555 FreeHeap((char*) chars);
2556 }
2557 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2558 JNI_END
2559
2560
2561 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2562 JNIWrapper("GetArrayLength");
2563 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2564 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2565 assert(a->is_array(), "must be array");
2566 jsize ret = a->length();
2567 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2568 return ret;
2569 JNI_END
2570
2571
2572 //
2573 // Object Array Operations
2574 //
2575
2576 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2577 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2578
2579 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2580 JNIWrapper("NewObjectArray");
2581 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2582 jobjectArray ret = NULL;
2583 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2584 Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
2585 Klass* ak = ek->array_klass(CHECK_NULL);
2586 ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
2587 objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
2588 oop initial_value = JNIHandles::resolve(initialElement);
2589 if (initial_value != NULL) { // array already initialized with NULL
2590 for (int index = 0; index < length; index++) {
2591 result->obj_at_put(index, initial_value);
2592 }
2593 }
2594 ret = (jobjectArray) JNIHandles::make_local(env, result);
2595 return ret;
2596 JNI_END
2597
2598 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2599 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2600
2601 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2602 JNIWrapper("GetObjectArrayElement");
2603 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2604 jobject ret = NULL;
2605 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2606 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2607 if (a->is_within_bounds(index)) {
2608 ret = JNIHandles::make_local(env, a->obj_at(index));
2609 return ret;
2610 } else {
2611 char buf[jintAsStringSize];
2612 sprintf(buf, "%d", index);
2613 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2614 }
2615 JNI_END
2616
2617 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2618 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2619
2620 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2621 JNIWrapper("SetObjectArrayElement");
2622 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2623 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2624
2625 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2626 oop v = JNIHandles::resolve(value);
2627 if (a->is_within_bounds(index)) {
2628 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2629 a->obj_at_put(index, v);
2630 } else {
2631 THROW(vmSymbols::java_lang_ArrayStoreException());
2632 }
2633 } else {
2634 char buf[jintAsStringSize];
2635 sprintf(buf, "%d", index);
2636 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2637 }
2638 JNI_END
2639
2640
2641
2642 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2643 ,EntryProbe,ReturnProbe) \
2644 \
2645 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2646 , ReturnProbe); \
2647 \
2648 JNI_ENTRY(Return, \
2649 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2650 JNIWrapper("New" XSTR(Result) "Array"); \
2651 EntryProbe; \
2652 Return ret = NULL;\
2653 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2654 \
2655 oop obj= oopFactory::Allocator(len, CHECK_0); \
2656 ret = (Return) JNIHandles::make_local(env, obj); \
2657 return ret;\
2658 JNI_END
2659
2660 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2661 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2662 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2663 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2664 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2665 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2666 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2667 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2668 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2669 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2670 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2671 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2672 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2673 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2674 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2676 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2677 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2679 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2680 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2681 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2682 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2683 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2684
2685 // Return an address which will fault if the caller writes to it.
2686
2687 static char* get_bad_address() {
2688 static char* bad_address = NULL;
2689 if (bad_address == NULL) {
2690 size_t size = os::vm_allocation_granularity();
2691 bad_address = os::reserve_memory(size);
2692 if (bad_address != NULL) {
2693 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2694 /*is_committed*/false);
2695 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2696 }
2697 }
2698 return bad_address;
2699 }
2700
2701
2702
2703 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2704 , EntryProbe, ReturnProbe) \
2705 \
2706 JNI_QUICK_ENTRY(ElementType*, \
2707 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2708 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2709 EntryProbe; \
2710 /* allocate an chunk of memory in c land */ \
2711 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2712 ElementType* result; \
2713 int len = a->length(); \
2714 if (len == 0) { \
2715 /* Empty array: legal but useless, can't return NULL. \
2716 * Return a pointer to something useless. \
2717 * Avoid asserts in typeArrayOop. */ \
2718 result = (ElementType*)get_bad_address(); \
2719 } else { \
2720 /* JNI Specification states return NULL on OOM */ \
2721 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2722 if (result != NULL) { \
2723 /* copy the array to the c chunk */ \
2724 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2725 if (isCopy) { \
2726 *isCopy = JNI_TRUE; \
2727 } \
2728 } \
2729 } \
2730 ReturnProbe; \
2731 return result; \
2732 JNI_END
2733
2734 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2735 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2736 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2737 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2738 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2739 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2740 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2741 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2742 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2743 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2744 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2745 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2746 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2747 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2748 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2749 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2750 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2751 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2752 // Float and double probes don't return value because dtrace doesn't currently support it
2753 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2754 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2755 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2757 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2758 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2759
2760
2761 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2762 , EntryProbe, ReturnProbe);\
2763 \
2764 JNI_QUICK_ENTRY(void, \
2765 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2766 ElementType *buf, jint mode)) \
2767 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2768 EntryProbe; \
2769 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2770 int len = a->length(); \
2771 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2772 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2773 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2774 } \
2775 if ((mode == 0) || (mode == JNI_ABORT)) { \
2776 FreeHeap(buf); \
2777 } \
2778 } \
2779 ReturnProbe; \
2780 JNI_END
2781
2782 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2783 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2784 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2785 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2786 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2787 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2788 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2789 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2790 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2791 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2792 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2793 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2794 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2795 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2796 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2797 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2798 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2799 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2800 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2801 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2802 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2803 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2804 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2805 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2806
2807
2808 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2809 , EntryProbe, ReturnProbe); \
2810 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2811 , ReturnProbe); \
2812 \
2813 JNI_ENTRY(void, \
2814 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2815 jsize len, ElementType *buf)) \
2816 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2817 EntryProbe; \
2818 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2819 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2820 if (start < 0 || len < 0 || (start > src->length() - len)) { \
2821 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2822 } else { \
2823 if (len > 0) { \
2824 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2825 memcpy((u_char*) buf, \
2826 (u_char*) src->Tag##_at_addr(start), \
2827 len << sc); \
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 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2875 memcpy((u_char*) dst->Tag##_at_addr(start), \
2876 (u_char*) buf, \
2877 len << sc); \
2878 } \
2879 } \
2880 JNI_END
2881
2882 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2883 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2884 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2885 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2886 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2887 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2888 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2889 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2890 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2891 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2892 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2893 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2894 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2895 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2896 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2897 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2898 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2899 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2900 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2901 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2902 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2903 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2904 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2905 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2906
2907
2908 //
2909 // Interception of natives
2910 //
2911
2912 // The RegisterNatives call being attempted tried to register with a method that
2913 // is not native. Ask JVM TI what prefixes have been specified. Then check
2914 // to see if the native method is now wrapped with the prefixes. See the
2915 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2916 static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
2917 #if INCLUDE_JVMTI
2918 ResourceMark rm(THREAD);
2919 Method* method;
2920 int name_len = name->utf8_length();
2921 char* name_str = name->as_utf8();
2922 int prefix_count;
2923 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2924 for (int i = 0; i < prefix_count; i++) {
2925 char* prefix = prefixes[i];
2926 int prefix_len = (int)strlen(prefix);
2927
2928 // try adding this prefix to the method name and see if it matches another method name
2929 int trial_len = name_len + prefix_len;
2930 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2931 strcpy(trial_name_str, prefix);
2932 strcat(trial_name_str, name_str);
2933 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2934 if (trial_name == NULL) {
2935 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2936 }
2937 method = k->lookup_method(trial_name, signature);
2938 if (method == NULL) {
2939 continue; // signature doesn't match, try the next prefix
2940 }
2941 if (method->is_native()) {
2942 method->set_is_prefixed_native();
2943 return method; // wahoo, we found a prefixed version of the method, return it
2944 }
2945 // found as non-native, so prefix is good, add it, probably just need more prefixes
2946 name_len = trial_len;
2947 name_str = trial_name_str;
2948 }
2949 #endif // INCLUDE_JVMTI
2950 return NULL; // not found
2951 }
2952
2953 static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2954 Method* method = k->lookup_method(name, signature);
2955 if (method == NULL) {
2956 ResourceMark rm;
2957 stringStream st;
2958 st.print("Method %s name or signature does not match",
2959 Method::name_and_sig_as_C_string(k, name, signature));
2960 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2961 }
2962 if (!method->is_native()) {
2963 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2964 method = find_prefixed_native(k, name, signature, THREAD);
2965 if (method == NULL) {
2966 ResourceMark rm;
2967 stringStream st;
2968 st.print("Method %s is not declared as native",
2969 Method::name_and_sig_as_C_string(k, name, signature));
2970 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2971 }
2972 }
2973
2974 if (entry != NULL) {
2975 method->set_native_function(entry,
2976 Method::native_bind_event_is_interesting);
2977 } else {
2978 method->clear_native_function();
2979 }
2980 if (PrintJNIResolving) {
2981 ResourceMark rm(THREAD);
2982 tty->print_cr("[Registering JNI native method %s.%s]",
2983 method->method_holder()->external_name(),
2984 method->name()->as_C_string());
2985 }
2986 return true;
2987 }
2988
2989 DT_RETURN_MARK_DECL(RegisterNatives, jint
2990 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
2991
2992 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
2993 const JNINativeMethod *methods,
2994 jint nMethods))
2995 JNIWrapper("RegisterNatives");
2996 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
2997 jint ret = 0;
2998 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
2999
3000 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3001
3002 for (int index = 0; index < nMethods; index++) {
3003 const char* meth_name = methods[index].name;
3004 const char* meth_sig = methods[index].signature;
3005 int meth_name_len = (int)strlen(meth_name);
3006
3007 // The class should have been loaded (we have an instance of the class
3008 // passed in) so the method and signature should already be in the symbol
3009 // table. If they're not there, the method doesn't exist.
3010 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3011 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3012
3013 if (name == NULL || signature == NULL) {
3014 ResourceMark rm;
3015 stringStream st;
3016 st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
3017 // Must return negative value on failure
3018 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3019 }
3020
3021 bool res = register_native(k, name, signature,
3022 (address) methods[index].fnPtr, THREAD);
3023 if (!res) {
3024 ret = -1;
3025 break;
3026 }
3027 }
3028 return ret;
3029 JNI_END
3030
3031
3032 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3033 JNIWrapper("UnregisterNatives");
3034 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3035 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3036 //%note jni_2
3037 if (k->is_instance_klass()) {
3038 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3039 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3040 if (m->is_native()) {
3041 m->clear_native_function();
3042 m->set_signature_handler(NULL);
3043 }
3044 }
3045 }
3046 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3047 return 0;
3048 JNI_END
3049
3050 //
3051 // Monitor functions
3052 //
3053
3054 DT_RETURN_MARK_DECL(MonitorEnter, jint
3055 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3056
3057 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3058 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3059 jint ret = JNI_ERR;
3060 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3061
3062 // If the object is null, we can't do anything with it
3063 if (jobj == NULL) {
3064 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3065 }
3066
3067 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3068 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3069 ret = JNI_OK;
3070 return ret;
3071 JNI_END
3072
3073 DT_RETURN_MARK_DECL(MonitorExit, jint
3074 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3075
3076 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3077 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3078 jint ret = JNI_ERR;
3079 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3080
3081 // Don't do anything with a null object
3082 if (jobj == NULL) {
3083 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3084 }
3085
3086 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3087 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3088
3089 ret = JNI_OK;
3090 return ret;
3091 JNI_END
3092
3093 //
3094 // Extensions
3095 //
3096
3097 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3098 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3099
3100 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3101 JNIWrapper("GetStringRegion");
3102 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3103 DT_VOID_RETURN_MARK(GetStringRegion);
3104 oop s = JNIHandles::resolve_non_null(string);
3105 int s_len = java_lang_String::length(s);
3106 if (start < 0 || len < 0 || start > s_len - len) {
3107 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3108 } else {
3109 if (len > 0) {
3110 typeArrayOop s_value = java_lang_String::value(s);
3111 bool is_latin1 = java_lang_String::is_latin1(s);
3112 if (!is_latin1) {
3113 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3114 } else {
3115 for (int i = 0; i < len; i++) {
3116 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3117 }
3118 }
3119 }
3120 }
3121 JNI_END
3122
3123 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3124 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3125
3126 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3127 JNIWrapper("GetStringUTFRegion");
3128 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3129 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3130 oop s = JNIHandles::resolve_non_null(string);
3131 int s_len = java_lang_String::length(s);
3132 if (start < 0 || len < 0 || start > s_len - len) {
3133 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3134 } else {
3135 //%note jni_7
3136 if (len > 0) {
3137 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3138 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3139 // as_utf8_string null-terminates the result string
3140 } else {
3141 // JDK null-terminates the buffer even in len is zero
3142 if (buf != NULL) {
3143 buf[0] = 0;
3144 }
3145 }
3146 }
3147 JNI_END
3148
3149 static oop lock_gc_or_pin_object(JavaThread* thread, jobject obj) {
3150 if (Universe::heap()->supports_object_pinning()) {
3151 const oop o = JNIHandles::resolve_non_null(obj);
3152 return Universe::heap()->pin_object(thread, o);
3153 } else {
3154 GCLocker::lock_critical(thread);
3155 return JNIHandles::resolve_non_null(obj);
3156 }
3157 }
3158
3159 static void unlock_gc_or_unpin_object(JavaThread* thread, jobject obj) {
3160 if (Universe::heap()->supports_object_pinning()) {
3161 const oop o = JNIHandles::resolve_non_null(obj);
3162 return Universe::heap()->unpin_object(thread, o);
3163 } else {
3164 GCLocker::unlock_critical(thread);
3165 }
3166 }
3167
3168 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3169 JNIWrapper("GetPrimitiveArrayCritical");
3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3171 if (isCopy != NULL) {
3172 *isCopy = JNI_FALSE;
3173 }
3174 oop a = lock_gc_or_pin_object(thread, array);
3175 assert(a->is_array(), "just checking");
3176 BasicType type;
3177 if (a->is_objArray()) {
3178 type = T_OBJECT;
3179 } else {
3180 type = TypeArrayKlass::cast(a->klass())->element_type();
3181 }
3182 void* ret = arrayOop(a)->base(type);
3183 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3184 return ret;
3185 JNI_END
3186
3187
3188 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3189 JNIWrapper("ReleasePrimitiveArrayCritical");
3190 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3191 unlock_gc_or_unpin_object(thread, array);
3192 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3193 JNI_END
3194
3195
3196 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3197 JNIWrapper("GetStringCritical");
3198 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3199 oop s = lock_gc_or_pin_object(thread, string);
3200 typeArrayOop s_value = java_lang_String::value(s);
3201 bool is_latin1 = java_lang_String::is_latin1(s);
3202 if (isCopy != NULL) {
3203 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3204 }
3205 jchar* ret;
3206 if (!is_latin1) {
3207 ret = (jchar*) s_value->base(T_CHAR);
3208 } else {
3209 // Inflate latin1 encoded string to UTF16
3210 int s_len = java_lang_String::length(s);
3211 ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
3212 /* JNI Specification states return NULL on OOM */
3213 if (ret != NULL) {
3214 for (int i = 0; i < s_len; i++) {
3215 ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3216 }
3217 ret[s_len] = 0;
3218 }
3219 }
3220 HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3221 return ret;
3222 JNI_END
3223
3224
3225 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3226 JNIWrapper("ReleaseStringCritical");
3227 HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3228 // The str and chars arguments are ignored for UTF16 strings
3229 oop s = JNIHandles::resolve_non_null(str);
3230 bool is_latin1 = java_lang_String::is_latin1(s);
3231 if (is_latin1) {
3232 // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3233 // This assumes that ReleaseStringCritical bookends GetStringCritical.
3234 FREE_C_HEAP_ARRAY(jchar, chars);
3235 }
3236 unlock_gc_or_unpin_object(thread, str);
3237 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3238 JNI_END
3239
3240
3241 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3242 JNIWrapper("jni_NewWeakGlobalRef");
3243 HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3244 Handle ref_handle(thread, JNIHandles::resolve(ref));
3245 jweak ret = JNIHandles::make_weak_global(ref_handle);
3246 HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3247 return ret;
3248 JNI_END
3249
3250 // Must be JNI_ENTRY (with HandleMark)
3251 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3252 JNIWrapper("jni_DeleteWeakGlobalRef");
3253 HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3254 JNIHandles::destroy_weak_global(ref);
3255 HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3256 JNI_END
3257
3258
3259 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3260 JNIWrapper("jni_ExceptionCheck");
3261 HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3262 jni_check_async_exceptions(thread);
3263 jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3264 HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3265 return ret;
3266 JNI_END
3267
3268
3269 // Initialization state for three routines below relating to
3270 // java.nio.DirectBuffers
3271 static int directBufferSupportInitializeStarted = 0;
3272 static volatile int directBufferSupportInitializeEnded = 0;
3273 static volatile int directBufferSupportInitializeFailed = 0;
3274 static jclass bufferClass = NULL;
3275 static jclass directBufferClass = NULL;
3276 static jclass directByteBufferClass = NULL;
3277 static jmethodID directByteBufferConstructor = NULL;
3278 static jfieldID directBufferAddressField = NULL;
3279 static jfieldID bufferCapacityField = NULL;
3280
3281 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3282 Handle loader; // null (bootstrap) loader
3283 Handle protection_domain; // null protection domain
3284
3285 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3286 jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3287
3288 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3289 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3290 }
3291 return result;
3292 }
3293
3294 // These lookups are done with the NULL (bootstrap) ClassLoader to
3295 // circumvent any security checks that would be done by jni_FindClass.
3296 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3297 {
3298 if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
3299 if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
3300 if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3301 return true;
3302 }
3303 JNI_END
3304
3305
3306 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3307 if (directBufferSupportInitializeFailed) {
3308 return false;
3309 }
3310
3311 if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3312 if (!lookupDirectBufferClasses(env)) {
3313 directBufferSupportInitializeFailed = 1;
3314 return false;
3315 }
3316
3317 // Make global references for these
3318 bufferClass = (jclass) env->NewGlobalRef(bufferClass);
3319 directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
3320 directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3321
3322 // Get needed field and method IDs
3323 directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3324 if (env->ExceptionCheck()) {
3325 env->ExceptionClear();
3326 directBufferSupportInitializeFailed = 1;
3327 return false;
3328 }
3329 directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
3330 if (env->ExceptionCheck()) {
3331 env->ExceptionClear();
3332 directBufferSupportInitializeFailed = 1;
3333 return false;
3334 }
3335 bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
3336 if (env->ExceptionCheck()) {
3337 env->ExceptionClear();
3338 directBufferSupportInitializeFailed = 1;
3339 return false;
3340 }
3341
3342 if ((directByteBufferConstructor == NULL) ||
3343 (directBufferAddressField == NULL) ||
3344 (bufferCapacityField == NULL)) {
3345 directBufferSupportInitializeFailed = 1;
3346 return false;
3347 }
3348
3349 directBufferSupportInitializeEnded = 1;
3350 } else {
3351 while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3352 os::naked_yield();
3353 }
3354 }
3355
3356 return !directBufferSupportInitializeFailed;
3357 }
3358
3359 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3360 {
3361 // thread_from_jni_environment() will block if VM is gone.
3362 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3363
3364 JNIWrapper("jni_NewDirectByteBuffer");
3365 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3366
3367 if (!directBufferSupportInitializeEnded) {
3368 if (!initializeDirectBufferSupport(env, thread)) {
3369 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3370 return NULL;
3371 }
3372 }
3373
3374 // Being paranoid about accidental sign extension on address
3375 jlong addr = (jlong) ((uintptr_t) address);
3376 // NOTE that package-private DirectByteBuffer constructor currently
3377 // takes int capacity
3378 jint cap = (jint) capacity;
3379 jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3380 HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3381 return ret;
3382 }
3383
3384 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3385 , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3386
3387 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3388 {
3389 // thread_from_jni_environment() will block if VM is gone.
3390 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3391
3392 JNIWrapper("jni_GetDirectBufferAddress");
3393 HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3394 void* ret = NULL;
3395 DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3396
3397 if (!directBufferSupportInitializeEnded) {
3398 if (!initializeDirectBufferSupport(env, thread)) {
3399 return 0;
3400 }
3401 }
3402
3403 if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3404 return 0;
3405 }
3406
3407 ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3408 return ret;
3409 }
3410
3411 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3412 , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3413
3414 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3415 {
3416 // thread_from_jni_environment() will block if VM is gone.
3417 JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3418
3419 JNIWrapper("jni_GetDirectBufferCapacity");
3420 HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3421 jlong ret = -1;
3422 DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3423
3424 if (!directBufferSupportInitializeEnded) {
3425 if (!initializeDirectBufferSupport(env, thread)) {
3426 ret = 0;
3427 return ret;
3428 }
3429 }
3430
3431 if (buf == NULL) {
3432 return -1;
3433 }
3434
3435 if (!env->IsInstanceOf(buf, directBufferClass)) {
3436 return -1;
3437 }
3438
3439 // NOTE that capacity is currently an int in the implementation
3440 ret = env->GetIntField(buf, bufferCapacityField);
3441 return ret;
3442 }
3443
3444
3445 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3446 JNIWrapper("GetVersion");
3447 HOTSPOT_JNI_GETVERSION_ENTRY(env);
3448 HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3449 return CurrentVersion;
3450 JNI_END
3451
3452 extern struct JavaVM_ main_vm;
3453
3454 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3455 JNIWrapper("jni_GetJavaVM");
3456 HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3457 *vm = (JavaVM *)(&main_vm);
3458 HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3459 return JNI_OK;
3460 JNI_END
3461
3462
3463 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3464 JNIWrapper("GetModule");
3465 return Modules::get_module(clazz, THREAD);
3466 JNI_END
3467
3468
3469 // Structure containing all jni functions
3470 struct JNINativeInterface_ jni_NativeInterface = {
3471 NULL,
3472 NULL,
3473 NULL,
3474
3475 NULL,
3476
3477 jni_GetVersion,
3478
3479 jni_DefineClass,
3480 jni_FindClass,
3481
3482 jni_FromReflectedMethod,
3483 jni_FromReflectedField,
3484
3485 jni_ToReflectedMethod,
3486
3487 jni_GetSuperclass,
3488 jni_IsAssignableFrom,
3489
3490 jni_ToReflectedField,
3491
3492 jni_Throw,
3493 jni_ThrowNew,
3494 jni_ExceptionOccurred,
3495 jni_ExceptionDescribe,
3496 jni_ExceptionClear,
3497 jni_FatalError,
3498
3499 jni_PushLocalFrame,
3500 jni_PopLocalFrame,
3501
3502 jni_NewGlobalRef,
3503 jni_DeleteGlobalRef,
3504 jni_DeleteLocalRef,
3505 jni_IsSameObject,
3506
3507 jni_NewLocalRef,
3508 jni_EnsureLocalCapacity,
3509
3510 jni_AllocObject,
3511 jni_NewObject,
3512 jni_NewObjectV,
3513 jni_NewObjectA,
3514
3515 jni_GetObjectClass,
3516 jni_IsInstanceOf,
3517
3518 jni_GetMethodID,
3519
3520 jni_CallObjectMethod,
3521 jni_CallObjectMethodV,
3522 jni_CallObjectMethodA,
3523 jni_CallBooleanMethod,
3524 jni_CallBooleanMethodV,
3525 jni_CallBooleanMethodA,
3526 jni_CallByteMethod,
3527 jni_CallByteMethodV,
3528 jni_CallByteMethodA,
3529 jni_CallCharMethod,
3530 jni_CallCharMethodV,
3531 jni_CallCharMethodA,
3532 jni_CallShortMethod,
3533 jni_CallShortMethodV,
3534 jni_CallShortMethodA,
3535 jni_CallIntMethod,
3536 jni_CallIntMethodV,
3537 jni_CallIntMethodA,
3538 jni_CallLongMethod,
3539 jni_CallLongMethodV,
3540 jni_CallLongMethodA,
3541 jni_CallFloatMethod,
3542 jni_CallFloatMethodV,
3543 jni_CallFloatMethodA,
3544 jni_CallDoubleMethod,
3545 jni_CallDoubleMethodV,
3546 jni_CallDoubleMethodA,
3547 jni_CallVoidMethod,
3548 jni_CallVoidMethodV,
3549 jni_CallVoidMethodA,
3550
3551 jni_CallNonvirtualObjectMethod,
3552 jni_CallNonvirtualObjectMethodV,
3553 jni_CallNonvirtualObjectMethodA,
3554 jni_CallNonvirtualBooleanMethod,
3555 jni_CallNonvirtualBooleanMethodV,
3556 jni_CallNonvirtualBooleanMethodA,
3557 jni_CallNonvirtualByteMethod,
3558 jni_CallNonvirtualByteMethodV,
3559 jni_CallNonvirtualByteMethodA,
3560 jni_CallNonvirtualCharMethod,
3561 jni_CallNonvirtualCharMethodV,
3562 jni_CallNonvirtualCharMethodA,
3563 jni_CallNonvirtualShortMethod,
3564 jni_CallNonvirtualShortMethodV,
3565 jni_CallNonvirtualShortMethodA,
3566 jni_CallNonvirtualIntMethod,
3567 jni_CallNonvirtualIntMethodV,
3568 jni_CallNonvirtualIntMethodA,
3569 jni_CallNonvirtualLongMethod,
3570 jni_CallNonvirtualLongMethodV,
3571 jni_CallNonvirtualLongMethodA,
3572 jni_CallNonvirtualFloatMethod,
3573 jni_CallNonvirtualFloatMethodV,
3574 jni_CallNonvirtualFloatMethodA,
3575 jni_CallNonvirtualDoubleMethod,
3576 jni_CallNonvirtualDoubleMethodV,
3577 jni_CallNonvirtualDoubleMethodA,
3578 jni_CallNonvirtualVoidMethod,
3579 jni_CallNonvirtualVoidMethodV,
3580 jni_CallNonvirtualVoidMethodA,
3581
3582 jni_GetFieldID,
3583
3584 jni_GetObjectField,
3585 jni_GetBooleanField,
3586 jni_GetByteField,
3587 jni_GetCharField,
3588 jni_GetShortField,
3589 jni_GetIntField,
3590 jni_GetLongField,
3591 jni_GetFloatField,
3592 jni_GetDoubleField,
3593
3594 jni_SetObjectField,
3595 jni_SetBooleanField,
3596 jni_SetByteField,
3597 jni_SetCharField,
3598 jni_SetShortField,
3599 jni_SetIntField,
3600 jni_SetLongField,
3601 jni_SetFloatField,
3602 jni_SetDoubleField,
3603
3604 jni_GetStaticMethodID,
3605
3606 jni_CallStaticObjectMethod,
3607 jni_CallStaticObjectMethodV,
3608 jni_CallStaticObjectMethodA,
3609 jni_CallStaticBooleanMethod,
3610 jni_CallStaticBooleanMethodV,
3611 jni_CallStaticBooleanMethodA,
3612 jni_CallStaticByteMethod,
3613 jni_CallStaticByteMethodV,
3614 jni_CallStaticByteMethodA,
3615 jni_CallStaticCharMethod,
3616 jni_CallStaticCharMethodV,
3617 jni_CallStaticCharMethodA,
3618 jni_CallStaticShortMethod,
3619 jni_CallStaticShortMethodV,
3620 jni_CallStaticShortMethodA,
3621 jni_CallStaticIntMethod,
3622 jni_CallStaticIntMethodV,
3623 jni_CallStaticIntMethodA,
3624 jni_CallStaticLongMethod,
3625 jni_CallStaticLongMethodV,
3626 jni_CallStaticLongMethodA,
3627 jni_CallStaticFloatMethod,
3628 jni_CallStaticFloatMethodV,
3629 jni_CallStaticFloatMethodA,
3630 jni_CallStaticDoubleMethod,
3631 jni_CallStaticDoubleMethodV,
3632 jni_CallStaticDoubleMethodA,
3633 jni_CallStaticVoidMethod,
3634 jni_CallStaticVoidMethodV,
3635 jni_CallStaticVoidMethodA,
3636
3637 jni_GetStaticFieldID,
3638
3639 jni_GetStaticObjectField,
3640 jni_GetStaticBooleanField,
3641 jni_GetStaticByteField,
3642 jni_GetStaticCharField,
3643 jni_GetStaticShortField,
3644 jni_GetStaticIntField,
3645 jni_GetStaticLongField,
3646 jni_GetStaticFloatField,
3647 jni_GetStaticDoubleField,
3648
3649 jni_SetStaticObjectField,
3650 jni_SetStaticBooleanField,
3651 jni_SetStaticByteField,
3652 jni_SetStaticCharField,
3653 jni_SetStaticShortField,
3654 jni_SetStaticIntField,
3655 jni_SetStaticLongField,
3656 jni_SetStaticFloatField,
3657 jni_SetStaticDoubleField,
3658
3659 jni_NewString,
3660 jni_GetStringLength,
3661 jni_GetStringChars,
3662 jni_ReleaseStringChars,
3663
3664 jni_NewStringUTF,
3665 jni_GetStringUTFLength,
3666 jni_GetStringUTFChars,
3667 jni_ReleaseStringUTFChars,
3668
3669 jni_GetArrayLength,
3670
3671 jni_NewObjectArray,
3672 jni_GetObjectArrayElement,
3673 jni_SetObjectArrayElement,
3674
3675 jni_NewBooleanArray,
3676 jni_NewByteArray,
3677 jni_NewCharArray,
3678 jni_NewShortArray,
3679 jni_NewIntArray,
3680 jni_NewLongArray,
3681 jni_NewFloatArray,
3682 jni_NewDoubleArray,
3683
3684 jni_GetBooleanArrayElements,
3685 jni_GetByteArrayElements,
3686 jni_GetCharArrayElements,
3687 jni_GetShortArrayElements,
3688 jni_GetIntArrayElements,
3689 jni_GetLongArrayElements,
3690 jni_GetFloatArrayElements,
3691 jni_GetDoubleArrayElements,
3692
3693 jni_ReleaseBooleanArrayElements,
3694 jni_ReleaseByteArrayElements,
3695 jni_ReleaseCharArrayElements,
3696 jni_ReleaseShortArrayElements,
3697 jni_ReleaseIntArrayElements,
3698 jni_ReleaseLongArrayElements,
3699 jni_ReleaseFloatArrayElements,
3700 jni_ReleaseDoubleArrayElements,
3701
3702 jni_GetBooleanArrayRegion,
3703 jni_GetByteArrayRegion,
3704 jni_GetCharArrayRegion,
3705 jni_GetShortArrayRegion,
3706 jni_GetIntArrayRegion,
3707 jni_GetLongArrayRegion,
3708 jni_GetFloatArrayRegion,
3709 jni_GetDoubleArrayRegion,
3710
3711 jni_SetBooleanArrayRegion,
3712 jni_SetByteArrayRegion,
3713 jni_SetCharArrayRegion,
3714 jni_SetShortArrayRegion,
3715 jni_SetIntArrayRegion,
3716 jni_SetLongArrayRegion,
3717 jni_SetFloatArrayRegion,
3718 jni_SetDoubleArrayRegion,
3719
3720 jni_RegisterNatives,
3721 jni_UnregisterNatives,
3722
3723 jni_MonitorEnter,
3724 jni_MonitorExit,
3725
3726 jni_GetJavaVM,
3727
3728 jni_GetStringRegion,
3729 jni_GetStringUTFRegion,
3730
3731 jni_GetPrimitiveArrayCritical,
3732 jni_ReleasePrimitiveArrayCritical,
3733
3734 jni_GetStringCritical,
3735 jni_ReleaseStringCritical,
3736
3737 jni_NewWeakGlobalRef,
3738 jni_DeleteWeakGlobalRef,
3739
3740 jni_ExceptionCheck,
3741
3742 jni_NewDirectByteBuffer,
3743 jni_GetDirectBufferAddress,
3744 jni_GetDirectBufferCapacity,
3745
3746 // New 1_6 features
3747
3748 jni_GetObjectRefType,
3749
3750 // Module features
3751
3752 jni_GetModule
3753 };
3754
3755
3756 // For jvmti use to modify jni function table.
3757 // Java threads in native contiues to run until it is transitioned
3758 // to VM at safepoint. Before the transition or before it is blocked
3759 // for safepoint it may access jni function table. VM could crash if
3760 // any java thread access the jni function table in the middle of memcpy.
3761 // To avoid this each function pointers are copied automically.
3762 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3763 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3764 intptr_t *a = (intptr_t *) jni_functions();
3765 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3766 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3767 Atomic::store(*b++, a++);
3768 }
3769 }
3770
3771 void quicken_jni_functions() {
3772 // Replace Get<Primitive>Field with fast versions
3773 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3774 && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3775 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3776 // windows x86 currently needs SEH wrapper and the gain of the fast
3777 // versions currently isn't certain for server vm on uniprocessor.
3778 && os::is_MP()
3779 #endif
3780 ) {
3781 address func;
3782 func = JNI_FastGetField::generate_fast_get_boolean_field();
3783 if (func != (address)-1) {
3784 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3785 }
3786 func = JNI_FastGetField::generate_fast_get_byte_field();
3787 if (func != (address)-1) {
3788 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3789 }
3790 func = JNI_FastGetField::generate_fast_get_char_field();
3791 if (func != (address)-1) {
3792 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3793 }
3794 func = JNI_FastGetField::generate_fast_get_short_field();
3795 if (func != (address)-1) {
3796 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3797 }
3798 func = JNI_FastGetField::generate_fast_get_int_field();
3799 if (func != (address)-1) {
3800 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3801 }
3802 func = JNI_FastGetField::generate_fast_get_long_field();
3803 if (func != (address)-1) {
3804 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3805 }
3806 func = JNI_FastGetField::generate_fast_get_float_field();
3807 if (func != (address)-1) {
3808 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3809 }
3810 func = JNI_FastGetField::generate_fast_get_double_field();
3811 if (func != (address)-1) {
3812 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3813 }
3814 }
3815 }
3816
3817 // Returns the function structure
3818 struct JNINativeInterface_* jni_functions() {
3819 #if INCLUDE_JNI_CHECK
3820 if (CheckJNICalls) return jni_functions_check();
3821 #endif // INCLUDE_JNI_CHECK
3822 return &jni_NativeInterface;
3823 }
3824
3825 // Returns the function structure
3826 struct JNINativeInterface_* jni_functions_nocheck() {
3827 return &jni_NativeInterface;
3828 }
3829
3830
3831 // Invocation API
3832
3833
3834 // Forward declaration
3835 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3836
3837 // Global invocation API vars
3838 volatile int vm_created = 0;
3839 // Indicate whether it is safe to recreate VM
3840 volatile int safe_to_recreate_vm = 1;
3841 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3842
3843
3844 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3845 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3846
3847 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3848 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3849
3850 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3851 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3852 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3853 jint ret = JNI_ERR;
3854 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3855
3856 if (Threads::is_supported_jni_version(args->version)) {
3857 ret = JNI_OK;
3858 }
3859 // 1.1 style no longer supported in hotspot.
3860 // According the JNI spec, we should update args->version on return.
3861 // We also use the structure to communicate with launcher about default
3862 // stack size.
3863 if (args->version == JNI_VERSION_1_1) {
3864 args->version = JNI_VERSION_1_2;
3865 // javaStackSize is int in arguments structure
3866 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3867 args->javaStackSize = (jint)(ThreadStackSize * K);
3868 }
3869 return ret;
3870 }
3871
3872 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3873 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3874
3875 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3876 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3877
3878 jint result = JNI_ERR;
3879 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3880
3881 // We're about to use Atomic::xchg for synchronization. Some Zero
3882 // platforms use the GCC builtin __sync_lock_test_and_set for this,
3883 // but __sync_lock_test_and_set is not guaranteed to do what we want
3884 // on all architectures. So we check it works before relying on it.
3885 #if defined(ZERO) && defined(ASSERT)
3886 {
3887 jint a = 0xcafebabe;
3888 jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
3889 void *c = &a;
3890 void *d = Atomic::xchg(&b, &c);
3891 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3892 assert(c == &b && d == &a, "Atomic::xchg() works");
3893 }
3894 #endif // ZERO && ASSERT
3895
3896 // At the moment it's only possible to have one Java VM,
3897 // since some of the runtime state is in global variables.
3898
3899 // We cannot use our mutex locks here, since they only work on
3900 // Threads. We do an atomic compare and exchange to ensure only
3901 // one thread can call this method at a time
3902
3903 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3904 // the add/dec implementations are dependent on whether we are running
3905 // on a multiprocessor, and at this stage of initialization the os::is_MP
3906 // function used to determine this will always return false. Atomic::xchg
3907 // does not have this problem.
3908 if (Atomic::xchg(1, &vm_created) == 1) {
3909 return JNI_EEXIST; // already created, or create attempt in progress
3910 }
3911 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3912 return JNI_ERR; // someone tried and failed and retry not allowed.
3913 }
3914
3915 assert(vm_created == 1, "vm_created is true during the creation");
3916
3917 /**
3918 * Certain errors during initialization are recoverable and do not
3919 * prevent this method from being called again at a later time
3920 * (perhaps with different arguments). However, at a certain
3921 * point during initialization if an error occurs we cannot allow
3922 * this function to be called again (or it will crash). In those
3923 * situations, the 'canTryAgain' flag is set to false, which atomically
3924 * sets safe_to_recreate_vm to 1, such that any new call to
3925 * JNI_CreateJavaVM will immediately fail using the above logic.
3926 */
3927 bool can_try_again = true;
3928
3929 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3930 if (result == JNI_OK) {
3931 JavaThread *thread = JavaThread::current();
3932 assert(!thread->has_pending_exception(), "should have returned not OK");
3933 /* thread is thread_in_vm here */
3934 *vm = (JavaVM *)(&main_vm);
3935 *(JNIEnv**)penv = thread->jni_environment();
3936
3937 #if INCLUDE_JVMCI
3938 if (EnableJVMCI) {
3939 if (UseJVMCICompiler) {
3940 // JVMCI is initialized on a CompilerThread
3941 if (BootstrapJVMCI) {
3942 JavaThread* THREAD = thread;
3943 JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
3944 compiler->bootstrap(THREAD);
3945 if (HAS_PENDING_EXCEPTION) {
3946 HandleMark hm;
3947 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3948 }
3949 }
3950 }
3951 }
3952 #endif
3953
3954 // Tracks the time application was running before GC
3955 RuntimeService::record_application_start();
3956
3957 // Notify JVMTI
3958 if (JvmtiExport::should_post_thread_life()) {
3959 JvmtiExport::post_thread_start(thread);
3960 }
3961
3962 EventThreadStart event;
3963 if (event.should_commit()) {
3964 event.set_thread(THREAD_TRACE_ID(thread));
3965 event.commit();
3966 }
3967
3968 #ifndef PRODUCT
3969 // Check if we should compile all classes on bootclasspath
3970 if (CompileTheWorld) ClassLoader::compile_the_world();
3971 if (ReplayCompiles) ciReplay::replay(thread);
3972
3973 // Some platforms (like Win*) need a wrapper around these test
3974 // functions in order to properly handle error conditions.
3975 VMError::test_error_handler();
3976 if (ExecuteInternalVMTests) {
3977 InternalVMTests::run();
3978 }
3979 #endif
3980
3981 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
3982 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
3983 } else {
3984 // If create_vm exits because of a pending exception, exit with that
3985 // exception. In the future when we figure out how to reclaim memory,
3986 // we may be able to exit with JNI_ERR and allow the calling application
3987 // to continue.
3988 if (Universe::is_fully_initialized()) {
3989 // otherwise no pending exception possible - VM will already have aborted
3990 JavaThread* THREAD = JavaThread::current();
3991 if (HAS_PENDING_EXCEPTION) {
3992 HandleMark hm;
3993 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3994 }
3995 }
3996
3997 if (can_try_again) {
3998 // reset safe_to_recreate_vm to 1 so that retrial would be possible
3999 safe_to_recreate_vm = 1;
4000 }
4001
4002 // Creation failed. We must reset vm_created
4003 *vm = 0;
4004 *(JNIEnv**)penv = 0;
4005 // reset vm_created last to avoid race condition. Use OrderAccess to
4006 // control both compiler and architectural-based reordering.
4007 OrderAccess::release_store(&vm_created, 0);
4008 }
4009
4010 // Flush stdout and stderr before exit.
4011 fflush(stdout);
4012 fflush(stderr);
4013
4014 return result;
4015
4016 }
4017
4018 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4019 jint result = JNI_ERR;
4020 // On Windows, let CreateJavaVM run with SEH protection
4021 #ifdef _WIN32
4022 __try {
4023 #endif
4024 result = JNI_CreateJavaVM_inner(vm, penv, args);
4025 #ifdef _WIN32
4026 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4027 // Nothing to do.
4028 }
4029 #endif
4030 return result;
4031 }
4032
4033 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4034 // See bug 4367188, the wrapper can sometimes cause VM crashes
4035 // JNIWrapper("GetCreatedJavaVMs");
4036
4037 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4038
4039 if (vm_created == 1) {
4040 if (numVMs != NULL) *numVMs = 1;
4041 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4042 } else {
4043 if (numVMs != NULL) *numVMs = 0;
4044 }
4045 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4046 return JNI_OK;
4047 }
4048
4049 extern "C" {
4050
4051 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4052 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4053
4054 static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
4055 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4056 jint res = JNI_ERR;
4057 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4058
4059 if (vm_created == 0) {
4060 res = JNI_ERR;
4061 return res;
4062 }
4063
4064 JNIWrapper("DestroyJavaVM");
4065 JNIEnv *env;
4066 JavaVMAttachArgs destroyargs;
4067 destroyargs.version = CurrentVersion;
4068 destroyargs.name = (char *)"DestroyJavaVM";
4069 destroyargs.group = NULL;
4070 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4071 if (res != JNI_OK) {
4072 return res;
4073 }
4074
4075 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4076 JavaThread* thread = JavaThread::current();
4077 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4078 if (Threads::destroy_vm()) {
4079 // Should not change thread state, VM is gone
4080 vm_created = 0;
4081 res = JNI_OK;
4082 return res;
4083 } else {
4084 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4085 res = JNI_ERR;
4086 return res;
4087 }
4088 }
4089
4090 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4091 jint result = JNI_ERR;
4092 // On Windows, we need SEH protection
4093 #ifdef _WIN32
4094 __try {
4095 #endif
4096 result = jni_DestroyJavaVM_inner(vm);
4097 #ifdef _WIN32
4098 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4099 // Nothing to do.
4100 }
4101 #endif
4102 return result;
4103 }
4104
4105 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4106 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4107
4108 // Check below commented out from JDK1.2fcs as well
4109 /*
4110 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4111 return JNI_EVERSION;
4112 }
4113 */
4114
4115 Thread* t = Thread::current_or_null();
4116 if (t != NULL) {
4117 // If the thread has been attached this operation is a no-op
4118 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4119 return JNI_OK;
4120 }
4121
4122 // Create a thread and mark it as attaching so it will be skipped by the
4123 // ThreadsListEnumerator - see CR 6404306
4124 JavaThread* thread = new JavaThread(true);
4125
4126 // Set correct safepoint info. The thread is going to call into Java when
4127 // initializing the Java level thread object. Hence, the correct state must
4128 // be set in order for the Safepoint code to deal with it correctly.
4129 thread->set_thread_state(_thread_in_vm);
4130 thread->record_stack_base_and_size();
4131 thread->initialize_thread_current();
4132
4133 if (!os::create_attached_thread(thread)) {
4134 thread->smr_delete();
4135 return JNI_ERR;
4136 }
4137 // Enable stack overflow checks
4138 thread->create_stack_guard_pages();
4139
4140 thread->initialize_tlab();
4141
4142 thread->cache_global_variables();
4143
4144 // Crucial that we do not have a safepoint check for this thread, since it has
4145 // not been added to the Thread list yet.
4146 { Threads_lock->lock_without_safepoint_check();
4147 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4148 // avoid this thread trying to do a GC before it is added to the thread-list
4149 thread->set_active_handles(JNIHandleBlock::allocate_block());
4150 Threads::add(thread, daemon);
4151 Threads_lock->unlock();
4152 }
4153 // Create thread group and name info from attach arguments
4154 oop group = NULL;
4155 char* thread_name = NULL;
4156 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4157 group = JNIHandles::resolve(args->group);
4158 thread_name = args->name; // may be NULL
4159 }
4160 if (group == NULL) group = Universe::main_thread_group();
4161
4162 // Create Java level thread object and attach it to this thread
4163 bool attach_failed = false;
4164 {
4165 EXCEPTION_MARK;
4166 HandleMark hm(THREAD);
4167 Handle thread_group(THREAD, group);
4168 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4169 if (HAS_PENDING_EXCEPTION) {
4170 CLEAR_PENDING_EXCEPTION;
4171 // cleanup outside the handle mark.
4172 attach_failed = true;
4173 }
4174 }
4175
4176 if (attach_failed) {
4177 // Added missing cleanup
4178 thread->cleanup_failed_attach_current_thread();
4179 return JNI_ERR;
4180 }
4181
4182 // mark the thread as no longer attaching
4183 // this uses a fence to push the change through so we don't have
4184 // to regrab the threads_lock
4185 thread->set_done_attaching_via_jni();
4186
4187 // Set java thread status.
4188 java_lang_Thread::set_thread_status(thread->threadObj(),
4189 java_lang_Thread::RUNNABLE);
4190
4191 // Notify the debugger
4192 if (JvmtiExport::should_post_thread_life()) {
4193 JvmtiExport::post_thread_start(thread);
4194 }
4195
4196 EventThreadStart event;
4197 if (event.should_commit()) {
4198 event.set_thread(THREAD_TRACE_ID(thread));
4199 event.commit();
4200 }
4201
4202 *(JNIEnv**)penv = thread->jni_environment();
4203
4204 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4205 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4206 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4207 // needed.
4208
4209 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4210
4211 // Perform any platform dependent FPU setup
4212 os::setup_fpu();
4213
4214 return JNI_OK;
4215 }
4216
4217
4218 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4219 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4220 if (vm_created == 0) {
4221 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4222 return JNI_ERR;
4223 }
4224
4225 JNIWrapper("AttachCurrentThread");
4226 jint ret = attach_current_thread(vm, penv, _args, false);
4227 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4228 return ret;
4229 }
4230
4231
4232 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4233 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4234
4235 JNIWrapper("DetachCurrentThread");
4236
4237 // If the thread has already been detached the operation is a no-op
4238 if (Thread::current_or_null() == NULL) {
4239 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4240 return JNI_OK;
4241 }
4242
4243 VM_Exit::block_if_vm_exited();
4244
4245 JavaThread* thread = JavaThread::current();
4246 if (thread->has_last_Java_frame()) {
4247 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4248 // Can't detach a thread that's running java, that can't work.
4249 return JNI_ERR;
4250 }
4251
4252 // Safepoint support. Have to do call-back to safepoint code, if in the
4253 // middle of a safepoint operation
4254 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4255
4256 // XXX: Note that JavaThread::exit() call below removes the guards on the
4257 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4258 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4259 // of the guards is visible in jni_AttachCurrentThread above,
4260 // the removal of the guards is buried below in JavaThread::exit()
4261 // here. The abstraction should be more symmetrically either exposed
4262 // or hidden (e.g. it could probably be hidden in the same
4263 // (platform-dependent) methods where we do alternate stack
4264 // maintenance work?)
4265 thread->exit(false, JavaThread::jni_detach);
4266 thread->smr_delete();
4267
4268 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4269 return JNI_OK;
4270 }
4271
4272 DT_RETURN_MARK_DECL(GetEnv, jint
4273 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4274
4275 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4276 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4277 jint ret = JNI_ERR;
4278 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4279
4280 if (vm_created == 0) {
4281 *penv = NULL;
4282 ret = JNI_EDETACHED;
4283 return ret;
4284 }
4285
4286 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4287 return ret;
4288 }
4289
4290 #ifndef JVMPI_VERSION_1
4291 // need these in order to be polite about older agents
4292 #define JVMPI_VERSION_1 ((jint)0x10000001)
4293 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4294 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4295 #endif // !JVMPI_VERSION_1
4296
4297 Thread* thread = Thread::current_or_null();
4298 if (thread != NULL && thread->is_Java_thread()) {
4299 if (Threads::is_supported_jni_version_including_1_1(version)) {
4300 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4301 ret = JNI_OK;
4302 return ret;
4303
4304 } else if (version == JVMPI_VERSION_1 ||
4305 version == JVMPI_VERSION_1_1 ||
4306 version == JVMPI_VERSION_1_2) {
4307 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4308 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4309 ret = JNI_EVERSION;
4310 return ret;
4311 } else if (JvmtiExport::is_jvmdi_version(version)) {
4312 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4313 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4314 ret = JNI_EVERSION;
4315 return ret;
4316 } else {
4317 *penv = NULL;
4318 ret = JNI_EVERSION;
4319 return ret;
4320 }
4321 } else {
4322 *penv = NULL;
4323 ret = JNI_EDETACHED;
4324 return ret;
4325 }
4326 }
4327
4328
4329 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4330 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4331 if (vm_created == 0) {
4332 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4333 return JNI_ERR;
4334 }
4335
4336 JNIWrapper("AttachCurrentThreadAsDaemon");
4337 jint ret = attach_current_thread(vm, penv, _args, true);
4338 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4339 return ret;
4340 }
4341
4342
4343 } // End extern "C"
4344
4345 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4346 NULL,
4347 NULL,
4348 NULL,
4349
4350 jni_DestroyJavaVM,
4351 jni_AttachCurrentThread,
4352 jni_DetachCurrentThread,
4353 jni_GetEnv,
4354 jni_AttachCurrentThreadAsDaemon
4355 };