1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "classfile/altHashing.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/modules.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/vmSymbols.hpp"
35 #include "gc/shared/gcLocker.inline.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/instanceOop.hpp"
43 #include "oops/markOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/typeArrayKlass.hpp"
50 #include "oops/typeArrayOop.hpp"
51 #include "prims/jni.h"
52 #include "prims/jniCheck.hpp"
53 #include "prims/jniExport.hpp"
54 #include "prims/jniFastGetField.hpp"
55 #include "prims/jvm.h"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "runtime/atomic.inline.hpp"
60 #include "runtime/compilationPolicy.hpp"
61 #include "runtime/fieldDescriptor.hpp"
62 #include "runtime/fprofiler.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/interfaceSupport.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/orderAccess.inline.hpp"
69 #include "runtime/reflection.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/signature.hpp"
72 #include "runtime/thread.inline.hpp"
73 #include "runtime/vm_operations.hpp"
74 #include "services/memTracker.hpp"
75 #include "services/runtimeService.hpp"
76 #include "trace/tracing.hpp"
77 #include "utilities/defaultStream.hpp"
78 #include "utilities/dtrace.hpp"
79 #include "utilities/events.hpp"
80 #include "utilities/histogram.hpp"
81 #include "utilities/macros.hpp"
82 #if INCLUDE_ALL_GCS
83 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
84 #endif // INCLUDE_ALL_GCS
85 #if INCLUDE_JVMCI
86 #include "jvmci/jvmciCompiler.hpp"
87 #include "jvmci/jvmciRuntime.hpp"
88 #endif
89
90 static jint CurrentVersion = JNI_VERSION_1_8;
91
92 #ifdef _WIN32
93 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
94 #endif
95
96 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
97 // '-return' probe regardless of the return path is taken out of the function.
98 // Methods that have multiple return paths use this to avoid having to
99 // instrument each return path. Methods that use CHECK or THROW must use this
100 // since those macros can cause an immedate uninstrumented return.
101 //
102 // In order to get the return value, a reference to the variable containing
103 // the return value must be passed to the contructor of the object, and
104 // the return value must be set before return (since the mark object has
105 // a reference to it).
106 //
107 // Example:
108 // DT_RETURN_MARK_DECL(SomeFunc, int);
109 // JNI_ENTRY(int, SomeFunc, ...)
110 // int return_value = 0;
111 // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
112 // foo(CHECK_0)
113 // return_value = 5;
114 // return return_value;
115 // JNI_END
116 #define DT_RETURN_MARK_DECL(name, type, probe) \
117 DTRACE_ONLY( \
118 class DTraceReturnProbeMark_##name { \
119 public: \
120 const type& _ret_ref; \
121 DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
122 ~DTraceReturnProbeMark_##name() { \
123 probe; \
124 } \
125 } \
126 )
127 // Void functions are simpler since there's no return value
128 #define DT_VOID_RETURN_MARK_DECL(name, probe) \
129 DTRACE_ONLY( \
130 class DTraceReturnProbeMark_##name { \
131 public: \
132 ~DTraceReturnProbeMark_##name() { \
133 probe; \
134 } \
135 } \
136 )
137
138 // Place these macros in the function to mark the return. Non-void
139 // functions need the type and address of the return value.
140 #define DT_RETURN_MARK(name, type, ref) \
141 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
142 #define DT_VOID_RETURN_MARK(name) \
143 DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
144
145
146 // Use these to select distinct code for floating-point vs. non-floating point
147 // situations. Used from within common macros where we need slightly
148 // different behavior for Float/Double
149 #define FP_SELECT_Boolean(intcode, fpcode) intcode
150 #define FP_SELECT_Byte(intcode, fpcode) intcode
151 #define FP_SELECT_Char(intcode, fpcode) intcode
152 #define FP_SELECT_Short(intcode, fpcode) intcode
153 #define FP_SELECT_Object(intcode, fpcode) intcode
154 #define FP_SELECT_Int(intcode, fpcode) intcode
155 #define FP_SELECT_Long(intcode, fpcode) intcode
156 #define FP_SELECT_Float(intcode, fpcode) fpcode
157 #define FP_SELECT_Double(intcode, fpcode) fpcode
158 #define FP_SELECT(TypeName, intcode, fpcode) \
159 FP_SELECT_##TypeName(intcode, fpcode)
160
161 #define COMMA ,
162
163 // Choose DT_RETURN_MARK macros based on the type: float/double -> void
164 // (dtrace doesn't do FP yet)
165 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
166 FP_SELECT(TypeName, \
167 DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
168 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
169 FP_SELECT(TypeName, \
170 DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
171
172
173 // out-of-line helpers for class jfieldIDWorkaround:
174
175 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
176 if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
177 uintptr_t as_uint = (uintptr_t) id;
178 intptr_t offset = raw_instance_offset(id);
179 if (is_checked_jfieldID(id)) {
180 if (!klass_hash_ok(k, id)) {
181 return false;
182 }
183 }
184 return InstanceKlass::cast(k)->contains_field_offset(offset);
185 } else {
186 JNIid* result = (JNIid*) id;
187 #ifdef ASSERT
188 return result != NULL && result->is_static_field_id();
189 #else
190 return result != NULL;
191 #endif
192 }
193 }
194
195
196 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
197 if (offset <= small_offset_mask) {
198 Klass* field_klass = k;
199 Klass* super_klass = field_klass->super();
200 // With compressed oops the most super class with nonstatic fields would
201 // be the owner of fields embedded in the header.
202 while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
203 InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
204 field_klass = super_klass; // super contains the field also
205 super_klass = field_klass->super();
206 }
207 debug_only(No_Safepoint_Verifier nosafepoint;)
208 uintptr_t klass_hash = field_klass->identity_hash();
209 return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
210 } else {
211 #if 0
212 #ifndef PRODUCT
213 {
214 ResourceMark rm;
215 warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
216 }
217 #endif
218 #endif
219 return 0;
220 }
221 }
222
223 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
224 uintptr_t as_uint = (uintptr_t) id;
225 intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
226 do {
227 debug_only(No_Safepoint_Verifier nosafepoint;)
228 // Could use a non-blocking query for identity_hash here...
229 if ((k->identity_hash() & klass_mask) == klass_hash)
230 return true;
231 k = k->super();
232 } while (k != NULL);
233 return false;
234 }
235
236 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
237 guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
238 uintptr_t as_uint = (uintptr_t) id;
239 intptr_t offset = raw_instance_offset(id);
240 if (VerifyJNIFields) {
241 if (is_checked_jfieldID(id)) {
242 guarantee(klass_hash_ok(k, id),
243 "Bug in native code: jfieldID class must match object");
244 } else {
245 #if 0
246 #ifndef PRODUCT
247 if (Verbose) {
248 ResourceMark rm;
249 warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
250 }
251 #endif
252 #endif
253 }
254 }
255 guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
256 "Bug in native code: jfieldID offset must address interior of object");
257 }
258
259 // Wrapper to trace JNI functions
260
261 #ifdef ASSERT
262 Histogram* JNIHistogram;
263 static volatile jint JNIHistogram_lock = 0;
264
265 class JNITraceWrapper : public StackObj {
266 public:
267 JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
268 if (TraceJNICalls) {
269 va_list ap;
270 va_start(ap, format);
271 tty->print("JNI ");
272 tty->vprint_cr(format, ap);
273 va_end(ap);
274 }
275 }
276 };
277
278 class JNIHistogramElement : public HistogramElement {
279 public:
280 JNIHistogramElement(const char* name);
281 };
282
283 JNIHistogramElement::JNIHistogramElement(const char* elementName) {
284 _name = elementName;
285 uintx count = 0;
286
287 while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
288 while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
289 count +=1;
290 if ( (WarnOnStalledSpinLock > 0)
291 && (count % WarnOnStalledSpinLock == 0)) {
292 warning("JNIHistogram_lock seems to be stalled");
293 }
294 }
295 }
296
297
298 if(JNIHistogram == NULL)
299 JNIHistogram = new Histogram("JNI Call Counts",100);
300
301 JNIHistogram->add_element(this);
302 Atomic::dec(&JNIHistogram_lock);
303 }
304
305 #define JNICountWrapper(arg) \
306 static JNIHistogramElement* e = new JNIHistogramElement(arg); \
307 /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
308 if (e != NULL) e->increment_count()
309 #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
310 #else
311 #define JNIWrapper(arg)
312 #endif
313
314
315 // Implementation of JNI entries
316
317 DT_RETURN_MARK_DECL(DefineClass, jclass
318 , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
319
320 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
321 const jbyte *buf, jsize bufLen))
322 JNIWrapper("DefineClass");
323
324 HOTSPOT_JNI_DEFINECLASS_ENTRY(
325 env, (char*) name, loaderRef, (char*) buf, bufLen);
326
327 jclass cls = NULL;
328 DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
329
330 TempNewSymbol class_name = NULL;
331 // Since exceptions can be thrown, class initialization can take place
332 // if name is NULL no check for class name in .class stream has to be made.
333 if (name != NULL) {
334 const int str_len = (int)strlen(name);
335 if (str_len > Symbol::max_length()) {
336 // It's impossible to create this class; the name cannot fit
337 // into the constant pool.
338 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
339 }
340 class_name = SymbolTable::new_symbol(name, CHECK_NULL);
341 }
342 ResourceMark rm(THREAD);
343 ClassFileStream st((u1*) buf, bufLen, NULL);
344 Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
345
346 if (UsePerfData && !class_loader.is_null()) {
347 // check whether the current caller thread holds the lock or not.
348 // If not, increment the corresponding counter
349 if (ObjectSynchronizer::
350 query_lock_ownership((JavaThread*)THREAD, class_loader) !=
351 ObjectSynchronizer::owner_self) {
352 ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
353 }
354 }
355 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
356 Handle(), &st, true,
357 CHECK_NULL);
358
359 if (TraceClassResolution && k != NULL) {
360 trace_class_resolution(k);
361 }
362
363 cls = (jclass)JNIHandles::make_local(
364 env, k->java_mirror());
365 return cls;
366 JNI_END
367
368
369
370 static bool first_time_FindClass = true;
371
372 DT_RETURN_MARK_DECL(FindClass, jclass
373 , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
374
375 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
376 JNIWrapper("FindClass");
377
378 HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
379
380 jclass result = NULL;
381 DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
382
383 // Remember if we are the first invocation of jni_FindClass
384 bool first_time = first_time_FindClass;
385 first_time_FindClass = false;
386
387 // Sanity check the name: it cannot be null or larger than the maximum size
388 // name we can fit in the constant pool.
389 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
390 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
391 }
392
393 //%note jni_3
394 Handle loader;
395 Handle protection_domain;
396 // Find calling class
397 instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
398 if (k.not_null()) {
399 loader = Handle(THREAD, k->class_loader());
400 // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
401 // in the correct class context.
402 if (loader.is_null() &&
403 k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
404 JavaValue result(T_OBJECT);
405 JavaCalls::call_static(&result, k,
406 vmSymbols::getFromClass_name(),
407 vmSymbols::void_class_signature(),
408 thread);
409 if (HAS_PENDING_EXCEPTION) {
410 Handle ex(thread, thread->pending_exception());
411 CLEAR_PENDING_EXCEPTION;
412 THROW_HANDLE_0(ex);
413 }
414 oop mirror = (oop) result.get_jobject();
415 loader = Handle(THREAD,
416 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
417 protection_domain = Handle(THREAD,
418 InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
419 }
420 } else {
421 // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
422 loader = Handle(THREAD, SystemDictionary::java_system_loader());
423 }
424
425 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
426 result = find_class_from_class_loader(env, sym, true, loader,
427 protection_domain, true, thread);
428
429 if (TraceClassResolution && result != NULL) {
430 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
431 }
432
433 // If we were the first invocation of jni_FindClass, we enable compilation again
434 // rather than just allowing invocation counter to overflow and decay.
435 // Controlled by flag DelayCompilationDuringStartup.
436 if (first_time && !CompileTheWorld)
437 CompilationPolicy::completed_vm_startup();
438
439 return result;
440 JNI_END
441
442 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
443 , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
444
445 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
446 JNIWrapper("FromReflectedMethod");
447
448 HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
449
450 jmethodID ret = NULL;
451 DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
452
453 // method is a handle to a java.lang.reflect.Method object
454 oop reflected = JNIHandles::resolve_non_null(method);
455 oop mirror = NULL;
456 int slot = 0;
457
458 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
459 mirror = java_lang_reflect_Constructor::clazz(reflected);
460 slot = java_lang_reflect_Constructor::slot(reflected);
461 } else {
462 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
463 mirror = java_lang_reflect_Method::clazz(reflected);
464 slot = java_lang_reflect_Method::slot(reflected);
465 }
466 Klass* k = java_lang_Class::as_Klass(mirror);
467
468 KlassHandle k1(THREAD, k);
469 // Make sure class is initialized before handing id's out to methods
470 k1()->initialize(CHECK_NULL);
471 Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
472 ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
473 return ret;
474 JNI_END
475
476 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
477 , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
478
479 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
480 JNIWrapper("FromReflectedField");
481
482 HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
483
484 jfieldID ret = NULL;
485 DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
486
487 // field is a handle to a java.lang.reflect.Field object
488 oop reflected = JNIHandles::resolve_non_null(field);
489 oop mirror = java_lang_reflect_Field::clazz(reflected);
490 Klass* k = java_lang_Class::as_Klass(mirror);
491 int slot = java_lang_reflect_Field::slot(reflected);
492 int modifiers = java_lang_reflect_Field::modifiers(reflected);
493
494 KlassHandle k1(THREAD, k);
495 // Make sure class is initialized before handing id's out to fields
496 k1()->initialize(CHECK_NULL);
497
498 // First check if this is a static field
499 if (modifiers & JVM_ACC_STATIC) {
500 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
501 JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
502 assert(id != NULL, "corrupt Field object");
503 debug_only(id->set_is_static_field_id();)
504 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
505 ret = jfieldIDWorkaround::to_static_jfieldID(id);
506 return ret;
507 }
508
509 // The slot is the index of the field description in the field-array
510 // The jfieldID is the offset of the field within the object
511 // It may also have hash bits for k, if VerifyJNIFields is turned on.
512 intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
513 assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
514 ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
515 return ret;
516 JNI_END
517
518
519 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
520 , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
521
522 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
523 JNIWrapper("ToReflectedMethod");
524
525 HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
526
527 jobject ret = NULL;
528 DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
529
530 methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
531 assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
532 oop reflection_method;
533 if (m->is_initializer()) {
534 reflection_method = Reflection::new_constructor(m, CHECK_NULL);
535 } else {
536 reflection_method = Reflection::new_method(m, false, CHECK_NULL);
537 }
538 ret = JNIHandles::make_local(env, reflection_method);
539 return ret;
540 JNI_END
541
542 DT_RETURN_MARK_DECL(GetSuperclass, jclass
543 , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
544
545 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
546 JNIWrapper("GetSuperclass");
547
548 HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
549
550 jclass obj = NULL;
551 DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
552
553 oop mirror = JNIHandles::resolve_non_null(sub);
554 // primitive classes return NULL
555 if (java_lang_Class::is_primitive(mirror)) return NULL;
556
557 // Rules of Class.getSuperClass as implemented by KLass::java_super:
558 // arrays return Object
559 // interfaces return NULL
560 // proper classes return Klass::super()
561 Klass* k = java_lang_Class::as_Klass(mirror);
562 if (k->is_interface()) return NULL;
563
564 // return mirror for superclass
565 Klass* super = k->java_super();
566 // super2 is the value computed by the compiler's getSuperClass intrinsic:
567 debug_only(Klass* super2 = ( k->is_array_klass()
568 ? SystemDictionary::Object_klass()
569 : k->super() ) );
570 assert(super == super2,
571 "java_super computation depends on interface, array, other super");
572 obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
573 return obj;
574 JNI_END
575
576 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
577 JNIWrapper("IsSubclassOf");
578
579 HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
580
581 oop sub_mirror = JNIHandles::resolve_non_null(sub);
582 oop super_mirror = JNIHandles::resolve_non_null(super);
583 if (java_lang_Class::is_primitive(sub_mirror) ||
584 java_lang_Class::is_primitive(super_mirror)) {
585 jboolean ret = (sub_mirror == super_mirror);
586
587 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
588 return ret;
589 }
590 Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
591 Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
592 assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
593 jboolean ret = sub_klass->is_subtype_of(super_klass) ?
594 JNI_TRUE : JNI_FALSE;
595
596 HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
597 return ret;
598 JNI_END
599
600
601 DT_RETURN_MARK_DECL(Throw, jint
602 , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
603
604 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
605 JNIWrapper("Throw");
606
607 HOTSPOT_JNI_THROW_ENTRY(env, obj);
608
609 jint ret = JNI_OK;
610 DT_RETURN_MARK(Throw, jint, (const jint&)ret);
611
612 THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
613 ShouldNotReachHere();
614 return 0; // Mute compiler.
615 JNI_END
616
617
618 DT_RETURN_MARK_DECL(ThrowNew, jint
619 , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
620
621 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
622 JNIWrapper("ThrowNew");
623
624 HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
625
626 jint ret = JNI_OK;
627 DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
628
629 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
630 Symbol* name = k->name();
631 Handle class_loader (THREAD, k->class_loader());
632 Handle protection_domain (THREAD, k->protection_domain());
633 THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
634 ShouldNotReachHere();
635 return 0; // Mute compiler.
636 JNI_END
637
638
639 // JNI functions only transform a pending async exception to a synchronous
640 // exception in ExceptionOccurred and ExceptionCheck calls, since
641 // delivering an async exception in other places won't change the native
642 // code's control flow and would be harmful when native code further calls
643 // JNI functions with a pending exception. Async exception is also checked
644 // during the call, so ExceptionOccurred/ExceptionCheck won't return
645 // false but deliver the async exception at the very end during
646 // state transition.
647
648 static void jni_check_async_exceptions(JavaThread *thread) {
649 assert(thread == Thread::current(), "must be itself");
650 thread->check_and_handle_async_exceptions();
651 }
652
653 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
654 JNIWrapper("ExceptionOccurred");
655
656 HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
657
658 jni_check_async_exceptions(thread);
659 oop exception = thread->pending_exception();
660 jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
661
662 HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
663 return ret;
664 JNI_END
665
666
667 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
668 JNIWrapper("ExceptionDescribe");
669
670 HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
671
672 if (thread->has_pending_exception()) {
673 Handle ex(thread, thread->pending_exception());
674 thread->clear_pending_exception();
675 if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
676 // Don't print anything if we are being killed.
677 } else {
678 jio_fprintf(defaultStream::error_stream(), "Exception ");
679 if (thread != NULL && thread->threadObj() != NULL) {
680 ResourceMark rm(THREAD);
681 jio_fprintf(defaultStream::error_stream(),
682 "in thread \"%s\" ", thread->get_thread_name());
683 }
684 if (ex->is_a(SystemDictionary::Throwable_klass())) {
685 JavaValue result(T_VOID);
686 JavaCalls::call_virtual(&result,
687 ex,
688 KlassHandle(THREAD,
689 SystemDictionary::Throwable_klass()),
690 vmSymbols::printStackTrace_name(),
691 vmSymbols::void_method_signature(),
692 THREAD);
693 // If an exception is thrown in the call it gets thrown away. Not much
694 // we can do with it. The native code that calls this, does not check
695 // for the exception - hence, it might still be in the thread when DestroyVM gets
696 // called, potentially causing a few asserts to trigger - since no pending exception
697 // is expected.
698 CLEAR_PENDING_EXCEPTION;
699 } else {
700 ResourceMark rm(THREAD);
701 jio_fprintf(defaultStream::error_stream(),
702 ". Uncaught exception of type %s.",
703 ex->klass()->external_name());
704 }
705 }
706 }
707
708 HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
709 JNI_END
710
711
712 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
713 JNIWrapper("ExceptionClear");
714
715 HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
716
717 // The jni code might be using this API to clear java thrown exception.
718 // So just mark jvmti thread exception state as exception caught.
719 JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
720 if (state != NULL && state->is_exception_detected()) {
721 state->set_exception_caught();
722 }
723 thread->clear_pending_exception();
724
725 HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
726 JNI_END
727
728
729 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
730 JNIWrapper("FatalError");
731
732 HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
733
734 tty->print_cr("FATAL ERROR in native method: %s", msg);
735 thread->print_stack();
736 os::abort(); // Dump core and abort
737 JNI_END
738
739
740 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
741 JNIWrapper("PushLocalFrame");
742
743 HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
744
745 //%note jni_11
746 if (capacity < 0 ||
747 ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
748 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
749 return JNI_ERR;
750 }
751 JNIHandleBlock* old_handles = thread->active_handles();
752 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
753 assert(new_handles != NULL, "should not be NULL");
754 new_handles->set_pop_frame_link(old_handles);
755 thread->set_active_handles(new_handles);
756 jint ret = JNI_OK;
757 HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
758 return ret;
759 JNI_END
760
761
762 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
763 JNIWrapper("PopLocalFrame");
764
765 HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
766
767 //%note jni_11
768 Handle result_handle(thread, JNIHandles::resolve(result));
769 JNIHandleBlock* old_handles = thread->active_handles();
770 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
771 if (new_handles != NULL) {
772 // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
773 // This way code will still work if PopLocalFrame is called without a corresponding
774 // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
775 // the release_block call will release the blocks.
776 thread->set_active_handles(new_handles);
777 old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
778 JNIHandleBlock::release_block(old_handles, thread); // may block
779 result = JNIHandles::make_local(thread, result_handle());
780 }
781 HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
782 return result;
783 JNI_END
784
785
786 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
787 JNIWrapper("NewGlobalRef");
788
789 HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
790
791 Handle ref_handle(thread, JNIHandles::resolve(ref));
792 jobject ret = JNIHandles::make_global(ref_handle);
793
794 HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
795 return ret;
796 JNI_END
797
798 // Must be JNI_ENTRY (with HandleMark)
799 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
800 JNIWrapper("DeleteGlobalRef");
801
802 HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
803
804 JNIHandles::destroy_global(ref);
805
806 HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
807 JNI_END
808
809 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
810 JNIWrapper("DeleteLocalRef");
811
812 HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
813
814 JNIHandles::destroy_local(obj);
815
816 HOTSPOT_JNI_DELETELOCALREF_RETURN();
817 JNI_END
818
819 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
820 JNIWrapper("IsSameObject");
821
822 HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
823
824 oop a = JNIHandles::resolve(r1);
825 oop b = JNIHandles::resolve(r2);
826 jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
827
828 HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
829 return ret;
830 JNI_END
831
832
833 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
834 JNIWrapper("NewLocalRef");
835
836 HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
837
838 jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
839
840 HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
841 return ret;
842 JNI_END
843
844 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
845 JNIWrapper("EnsureLocalCapacity");
846
847 HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
848
849 jint ret;
850 if (capacity >= 0 &&
851 ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
852 ret = JNI_OK;
853 } else {
854 ret = JNI_ERR;
855 }
856
857 HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
858 return ret;
859 JNI_END
860
861 // Return the Handle Type
862 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
863 JNIWrapper("GetObjectRefType");
864
865 HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
866
867 jobjectRefType ret;
868 if (JNIHandles::is_local_handle(thread, obj) ||
869 JNIHandles::is_frame_handle(thread, obj))
870 ret = JNILocalRefType;
871 else if (JNIHandles::is_global_handle(obj))
872 ret = JNIGlobalRefType;
873 else if (JNIHandles::is_weak_global_handle(obj))
874 ret = JNIWeakGlobalRefType;
875 else
876 ret = JNIInvalidRefType;
877
878 HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
879 return ret;
880 JNI_END
881
882
883 class JNI_ArgumentPusher : public SignatureIterator {
884 protected:
885 JavaCallArguments* _arguments;
886
887 virtual void get_bool () = 0;
888 virtual void get_char () = 0;
889 virtual void get_short () = 0;
890 virtual void get_byte () = 0;
891 virtual void get_int () = 0;
892 virtual void get_long () = 0;
893 virtual void get_float () = 0;
894 virtual void get_double () = 0;
895 virtual void get_object () = 0;
896
897 JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
898 this->_return_type = T_ILLEGAL;
899 _arguments = NULL;
900 }
901
902 public:
903 virtual void iterate( uint64_t fingerprint ) = 0;
904
905 void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
906
907 inline void do_bool() { if (!is_return_type()) get_bool(); }
908 inline void do_char() { if (!is_return_type()) get_char(); }
909 inline void do_short() { if (!is_return_type()) get_short(); }
910 inline void do_byte() { if (!is_return_type()) get_byte(); }
911 inline void do_int() { if (!is_return_type()) get_int(); }
912 inline void do_long() { if (!is_return_type()) get_long(); }
913 inline void do_float() { if (!is_return_type()) get_float(); }
914 inline void do_double() { if (!is_return_type()) get_double(); }
915 inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
916 inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
917 inline void do_void() { }
918
919 JavaCallArguments* arguments() { return _arguments; }
920 void push_receiver(Handle h) { _arguments->push_oop(h); }
921 };
922
923
924 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
925 protected:
926 va_list _ap;
927
928 inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
929 inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
930 inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
931 inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
932 inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
933
934 // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
935
936 inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
937 inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
938 inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
939 inline void get_object() { jobject l = va_arg(_ap, jobject);
940 _arguments->push_oop(Handle((oop *)l, false)); }
941
942 inline void set_ap(va_list rap) {
943 #ifdef va_copy
944 va_copy(_ap, rap);
945 #elif defined (__va_copy)
946 __va_copy(_ap, rap);
947 #else
948 _ap = rap;
949 #endif
950 }
951
952 public:
953 JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
954 : JNI_ArgumentPusher(signature) {
955 set_ap(rap);
956 }
957 JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
958 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
959 set_ap(rap);
960 }
961
962 // Optimized path if we have the bitvector form of signature
963 void iterate( uint64_t fingerprint ) {
964 if (fingerprint == (uint64_t)CONST64(-1)) {
965 SignatureIterator::iterate(); // Must be too many arguments
966 } else {
967 _return_type = (BasicType)((fingerprint >> static_feature_size) &
968 result_feature_mask);
969
970 assert(fingerprint, "Fingerprint should not be 0");
971 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
972 while ( 1 ) {
973 switch ( fingerprint & parameter_feature_mask ) {
974 case bool_parm:
975 case char_parm:
976 case short_parm:
977 case byte_parm:
978 case int_parm:
979 get_int();
980 break;
981 case obj_parm:
982 get_object();
983 break;
984 case long_parm:
985 get_long();
986 break;
987 case float_parm:
988 get_float();
989 break;
990 case double_parm:
991 get_double();
992 break;
993 case done_parm:
994 return;
995 break;
996 default:
997 ShouldNotReachHere();
998 break;
999 }
1000 fingerprint >>= parameter_feature_size;
1001 }
1002 }
1003 }
1004 };
1005
1006
1007 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1008 protected:
1009 const jvalue *_ap;
1010
1011 inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); }
1012 inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
1013 inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
1014 inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
1015 inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
1016
1017 inline void get_long() { _arguments->push_long((_ap++)->j); }
1018 inline void get_float() { _arguments->push_float((_ap++)->f); }
1019 inline void get_double() { _arguments->push_double((_ap++)->d);}
1020 inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1021
1022 inline void set_ap(const jvalue *rap) { _ap = rap; }
1023
1024 public:
1025 JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1026 : JNI_ArgumentPusher(signature) {
1027 set_ap(rap);
1028 }
1029 JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1030 : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1031 set_ap(rap);
1032 }
1033
1034 // Optimized path if we have the bitvector form of signature
1035 void iterate( uint64_t fingerprint ) {
1036 if (fingerprint == (uint64_t)CONST64(-1)) {
1037 SignatureIterator::iterate(); // Must be too many arguments
1038 } else {
1039 _return_type = (BasicType)((fingerprint >> static_feature_size) &
1040 result_feature_mask);
1041 assert(fingerprint, "Fingerprint should not be 0");
1042 fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1043 while ( 1 ) {
1044 switch ( fingerprint & parameter_feature_mask ) {
1045 case bool_parm:
1046 get_bool();
1047 break;
1048 case char_parm:
1049 get_char();
1050 break;
1051 case short_parm:
1052 get_short();
1053 break;
1054 case byte_parm:
1055 get_byte();
1056 break;
1057 case int_parm:
1058 get_int();
1059 break;
1060 case obj_parm:
1061 get_object();
1062 break;
1063 case long_parm:
1064 get_long();
1065 break;
1066 case float_parm:
1067 get_float();
1068 break;
1069 case double_parm:
1070 get_double();
1071 break;
1072 case done_parm:
1073 return;
1074 break;
1075 default:
1076 ShouldNotReachHere();
1077 break;
1078 }
1079 fingerprint >>= parameter_feature_size;
1080 }
1081 }
1082 }
1083 };
1084
1085
1086 enum JNICallType {
1087 JNI_STATIC,
1088 JNI_VIRTUAL,
1089 JNI_NONVIRTUAL
1090 };
1091
1092
1093
1094 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1095 methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1096
1097 // Create object to hold arguments for the JavaCall, and associate it with
1098 // the jni parser
1099 ResourceMark rm(THREAD);
1100 int number_of_parameters = method->size_of_parameters();
1101 JavaCallArguments java_args(number_of_parameters);
1102 args->set_java_argument_object(&java_args);
1103
1104 assert(method->is_static(), "method should be static");
1105
1106 // Fill out JavaCallArguments object
1107 args->iterate( Fingerprinter(method).fingerprint() );
1108 // Initialize result type
1109 result->set_type(args->get_ret_type());
1110
1111 // Invoke the method. Result is returned as oop.
1112 JavaCalls::call(result, method, &java_args, CHECK);
1113
1114 // Convert result
1115 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1116 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1117 }
1118 }
1119
1120
1121 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1122 oop recv = JNIHandles::resolve(receiver);
1123 if (recv == NULL) {
1124 THROW(vmSymbols::java_lang_NullPointerException());
1125 }
1126 Handle h_recv(THREAD, recv);
1127
1128 int number_of_parameters;
1129 Method* selected_method;
1130 {
1131 Method* m = Method::resolve_jmethod_id(method_id);
1132 number_of_parameters = m->size_of_parameters();
1133 Klass* holder = m->method_holder();
1134 if (call_type != JNI_VIRTUAL) {
1135 selected_method = m;
1136 } else if (!m->has_itable_index()) {
1137 // non-interface call -- for that little speed boost, don't handlize
1138 debug_only(No_Safepoint_Verifier nosafepoint;)
1139 // jni_GetMethodID makes sure class is linked and initialized
1140 // so m should have a valid vtable index.
1141 assert(m->valid_vtable_index(), "no valid vtable index");
1142 int vtbl_index = m->vtable_index();
1143 if (vtbl_index != Method::nonvirtual_vtable_index) {
1144 Klass* k = h_recv->klass();
1145 // k might be an arrayKlassOop but all vtables start at
1146 // the same place. The cast is to avoid virtual call and assertion.
1147 InstanceKlass *ik = (InstanceKlass*)k;
1148 selected_method = ik->method_at_vtable(vtbl_index);
1149 } else {
1150 // final method
1151 selected_method = m;
1152 }
1153 } else {
1154 // interface call
1155 KlassHandle h_holder(THREAD, holder);
1156
1157 int itbl_index = m->itable_index();
1158 Klass* k = h_recv->klass();
1159 selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1160 }
1161 }
1162
1163 methodHandle method(THREAD, selected_method);
1164
1165 // Create object to hold arguments for the JavaCall, and associate it with
1166 // the jni parser
1167 ResourceMark rm(THREAD);
1168 JavaCallArguments java_args(number_of_parameters);
1169 args->set_java_argument_object(&java_args);
1170
1171 // handle arguments
1172 assert(!method->is_static(), "method should not be static");
1173 args->push_receiver(h_recv); // Push jobject handle
1174
1175 // Fill out JavaCallArguments object
1176 args->iterate( Fingerprinter(method).fingerprint() );
1177 // Initialize result type
1178 result->set_type(args->get_ret_type());
1179
1180 // Invoke the method. Result is returned as oop.
1181 JavaCalls::call(result, method, &java_args, CHECK);
1182
1183 // Convert result
1184 if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1185 result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1186 }
1187 }
1188
1189
1190 static instanceOop alloc_object(jclass clazz, TRAPS) {
1191 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1192 if (k == NULL) {
1193 ResourceMark rm(THREAD);
1194 THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1195 }
1196 k()->check_valid_for_instantiation(false, CHECK_NULL);
1197 InstanceKlass::cast(k())->initialize(CHECK_NULL);
1198 instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1199 return ih;
1200 }
1201
1202 DT_RETURN_MARK_DECL(AllocObject, jobject
1203 , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1204
1205 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1206 JNIWrapper("AllocObject");
1207
1208 HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1209
1210 jobject ret = NULL;
1211 DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1212
1213 instanceOop i = alloc_object(clazz, CHECK_NULL);
1214 ret = JNIHandles::make_local(env, i);
1215 return ret;
1216 JNI_END
1217
1218 DT_RETURN_MARK_DECL(NewObjectA, jobject
1219 , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1220
1221 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1222 JNIWrapper("NewObjectA");
1223
1224 HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1225
1226 jobject obj = NULL;
1227 DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1228
1229 instanceOop i = alloc_object(clazz, CHECK_NULL);
1230 obj = JNIHandles::make_local(env, i);
1231 JavaValue jvalue(T_VOID);
1232 JNI_ArgumentPusherArray ap(methodID, args);
1233 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1234 return obj;
1235 JNI_END
1236
1237
1238 DT_RETURN_MARK_DECL(NewObjectV, jobject
1239 , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1240
1241 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1242 JNIWrapper("NewObjectV");
1243
1244 HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1245
1246 jobject obj = NULL;
1247 DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1248
1249 instanceOop i = alloc_object(clazz, CHECK_NULL);
1250 obj = JNIHandles::make_local(env, i);
1251 JavaValue jvalue(T_VOID);
1252 JNI_ArgumentPusherVaArg ap(methodID, args);
1253 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1254 return obj;
1255 JNI_END
1256
1257
1258 DT_RETURN_MARK_DECL(NewObject, jobject
1259 , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1260
1261 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1262 JNIWrapper("NewObject");
1263
1264 HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1265
1266 jobject obj = NULL;
1267 DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1268
1269 instanceOop i = alloc_object(clazz, CHECK_NULL);
1270 obj = JNIHandles::make_local(env, i);
1271 va_list args;
1272 va_start(args, methodID);
1273 JavaValue jvalue(T_VOID);
1274 JNI_ArgumentPusherVaArg ap(methodID, args);
1275 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1276 va_end(args);
1277 return obj;
1278 JNI_END
1279
1280
1281 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1282 JNIWrapper("GetObjectClass");
1283
1284 HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1285
1286 Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1287 jclass ret =
1288 (jclass) JNIHandles::make_local(env, k->java_mirror());
1289
1290 HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1291 return ret;
1292 JNI_END
1293
1294 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1295 JNIWrapper("IsInstanceOf");
1296
1297 HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1298
1299 jboolean ret = JNI_TRUE;
1300 if (obj != NULL) {
1301 ret = JNI_FALSE;
1302 Klass* k = java_lang_Class::as_Klass(
1303 JNIHandles::resolve_non_null(clazz));
1304 if (k != NULL) {
1305 ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1306 }
1307 }
1308
1309 HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1310 return ret;
1311 JNI_END
1312
1313
1314 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1315 const char *sig, bool is_static, TRAPS) {
1316 // %%%% This code should probably just call into a method in the LinkResolver
1317 //
1318 // The class should have been loaded (we have an instance of the class
1319 // passed in) so the method and signature should already be in the symbol
1320 // table. If they're not there, the method doesn't exist.
1321 const char *name_to_probe = (name_str == NULL)
1322 ? vmSymbols::object_initializer_name()->as_C_string()
1323 : name_str;
1324 TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1325 TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1326
1327 if (name == NULL || signature == NULL) {
1328 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1329 }
1330
1331 // Throw a NoSuchMethodError exception if we have an instance of a
1332 // primitive java.lang.Class
1333 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1334 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1335 }
1336
1337 KlassHandle klass(THREAD,
1338 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1339
1340 // Make sure class is linked and initialized before handing id's out to
1341 // Method*s.
1342 klass()->initialize(CHECK_NULL);
1343
1344 Method* m;
1345 if (name == vmSymbols::object_initializer_name() ||
1346 name == vmSymbols::class_initializer_name()) {
1347 // Never search superclasses for constructors
1348 if (klass->is_instance_klass()) {
1349 m = InstanceKlass::cast(klass())->find_method(name, signature);
1350 } else {
1351 m = NULL;
1352 }
1353 } else {
1354 m = klass->lookup_method(name, signature);
1355 if (m == NULL && klass->is_instance_klass()) {
1356 m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1357 }
1358 }
1359 if (m == NULL || (m->is_static() != is_static)) {
1360 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1361 }
1362 return m->jmethod_id();
1363 }
1364
1365
1366 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1367 const char *name, const char *sig))
1368 JNIWrapper("GetMethodID");
1369 HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1370 jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1371 HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1372 return ret;
1373 JNI_END
1374
1375
1376 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1377 const char *name, const char *sig))
1378 JNIWrapper("GetStaticMethodID");
1379 HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1380 jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1381 HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1382 return ret;
1383 JNI_END
1384
1385
1386
1387 //
1388 // Calling Methods
1389 //
1390
1391
1392 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1393 , EntryProbe, ReturnProbe) \
1394 \
1395 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1396 , ReturnProbe); \
1397 \
1398 JNI_ENTRY(ResultType, \
1399 jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1400 JNIWrapper("Call" XSTR(Result) "Method"); \
1401 \
1402 EntryProbe; \
1403 ResultType ret = 0;\
1404 DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1405 (const ResultType&)ret);\
1406 \
1407 va_list args; \
1408 va_start(args, methodID); \
1409 JavaValue jvalue(Tag); \
1410 JNI_ArgumentPusherVaArg ap(methodID, args); \
1411 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1412 va_end(args); \
1413 ret = jvalue.get_##ResultType(); \
1414 return ret;\
1415 JNI_END
1416
1417 // the runtime type of subword integral basic types is integer
1418 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1419 , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1420 HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1421 DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
1422 , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1423 HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1424 DEFINE_CALLMETHOD(jchar, Char, T_CHAR
1425 , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426 HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jshort, Short, T_SHORT
1428 , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429 HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1430
1431 DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
1432 , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1433 HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1434 DEFINE_CALLMETHOD(jint, Int, T_INT,
1435 HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1436 HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1437 DEFINE_CALLMETHOD(jlong, Long, T_LONG
1438 , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439 HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1440 // Float and double probes don't return value because dtrace doesn't currently support it
1441 DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
1442 , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1443 HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1444 DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
1445 , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1446 HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1447
1448 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1449 , EntryProbe, ReturnProbe) \
1450 \
1451 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1452 , ReturnProbe); \
1453 \
1454 JNI_ENTRY(ResultType, \
1455 jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1456 JNIWrapper("Call" XSTR(Result) "MethodV"); \
1457 \
1458 EntryProbe;\
1459 ResultType ret = 0;\
1460 DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1461 (const ResultType&)ret);\
1462 \
1463 JavaValue jvalue(Tag); \
1464 JNI_ArgumentPusherVaArg ap(methodID, args); \
1465 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1466 ret = jvalue.get_##ResultType(); \
1467 return ret;\
1468 JNI_END
1469
1470 // the runtime type of subword integral basic types is integer
1471 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1472 , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1473 HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1474 DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
1475 , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1476 HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1477 DEFINE_CALLMETHODV(jchar, Char, T_CHAR
1478 , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479 HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jshort, Short, T_SHORT
1481 , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482 HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1483
1484 DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
1485 , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1486 HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1487 DEFINE_CALLMETHODV(jint, Int, T_INT,
1488 HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1489 HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1490 DEFINE_CALLMETHODV(jlong, Long, T_LONG
1491 , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492 HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1493 // Float and double probes don't return value because dtrace doesn't currently support it
1494 DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
1495 , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1496 HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1497 DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
1498 , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1499 HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1500
1501 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1502 , EntryProbe, ReturnProbe) \
1503 \
1504 DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1505 , ReturnProbe); \
1506 \
1507 JNI_ENTRY(ResultType, \
1508 jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1509 JNIWrapper("Call" XSTR(Result) "MethodA"); \
1510 EntryProbe; \
1511 ResultType ret = 0;\
1512 DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1513 (const ResultType&)ret);\
1514 \
1515 JavaValue jvalue(Tag); \
1516 JNI_ArgumentPusherArray ap(methodID, args); \
1517 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1518 ret = jvalue.get_##ResultType(); \
1519 return ret;\
1520 JNI_END
1521
1522 // the runtime type of subword integral basic types is integer
1523 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1524 , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1525 HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1526 DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
1527 , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1528 HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1529 DEFINE_CALLMETHODA(jchar, Char, T_CHAR
1530 , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531 HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jshort, Short, T_SHORT
1533 , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534 HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1535
1536 DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
1537 , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1538 HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1539 DEFINE_CALLMETHODA(jint, Int, T_INT,
1540 HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1541 HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1542 DEFINE_CALLMETHODA(jlong, Long, T_LONG
1543 , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544 HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1545 // Float and double probes don't return value because dtrace doesn't currently support it
1546 DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
1547 , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1548 HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1549 DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
1550 , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1551 HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1552
1553 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1554 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1556
1557
1558 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1559 JNIWrapper("CallVoidMethod");
1560 HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1561 DT_VOID_RETURN_MARK(CallVoidMethod);
1562
1563 va_list args;
1564 va_start(args, methodID);
1565 JavaValue jvalue(T_VOID);
1566 JNI_ArgumentPusherVaArg ap(methodID, args);
1567 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1568 va_end(args);
1569 JNI_END
1570
1571
1572 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1573 JNIWrapper("CallVoidMethodV");
1574 HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1575 DT_VOID_RETURN_MARK(CallVoidMethodV);
1576
1577 JavaValue jvalue(T_VOID);
1578 JNI_ArgumentPusherVaArg ap(methodID, args);
1579 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1580 JNI_END
1581
1582
1583 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1584 JNIWrapper("CallVoidMethodA");
1585 HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1586 DT_VOID_RETURN_MARK(CallVoidMethodA);
1587
1588 JavaValue jvalue(T_VOID);
1589 JNI_ArgumentPusherArray ap(methodID, args);
1590 jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1591 JNI_END
1592
1593
1594
1595 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1596 , EntryProbe, ReturnProbe) \
1597 \
1598 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1599 , ReturnProbe);\
1600 \
1601 JNI_ENTRY(ResultType, \
1602 jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1603 JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1604 \
1605 EntryProbe;\
1606 ResultType ret;\
1607 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1608 (const ResultType&)ret);\
1609 \
1610 va_list args; \
1611 va_start(args, methodID); \
1612 JavaValue jvalue(Tag); \
1613 JNI_ArgumentPusherVaArg ap(methodID, args); \
1614 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1615 va_end(args); \
1616 ret = jvalue.get_##ResultType(); \
1617 return ret;\
1618 JNI_END
1619
1620 // the runtime type of subword integral basic types is integer
1621 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1622 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1623 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1624 DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
1625 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1626 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1627 DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
1628 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
1631 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1633
1634 DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
1635 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1636 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1637 DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
1638 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1639 HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1640 DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
1641 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642 // Float and double probes don't return value because dtrace doesn't currently support it
1643 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1644 DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
1645 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1646 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1647 DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
1648 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1649 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1650
1651 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1652 , EntryProbe, ReturnProbe) \
1653 \
1654 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1655 , ReturnProbe);\
1656 \
1657 JNI_ENTRY(ResultType, \
1658 jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1659 JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1660 \
1661 EntryProbe;\
1662 ResultType ret;\
1663 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1664 (const ResultType&)ret);\
1665 \
1666 JavaValue jvalue(Tag); \
1667 JNI_ArgumentPusherVaArg ap(methodID, args); \
1668 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1669 ret = jvalue.get_##ResultType(); \
1670 return ret;\
1671 JNI_END
1672
1673 // the runtime type of subword integral basic types is integer
1674 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1675 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1676 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1677 DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
1678 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1679 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1680 DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
1681 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
1684 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1686
1687 DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
1688 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1689 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1690 DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
1691 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1692 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1693 DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
1694 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695 // Float and double probes don't return value because dtrace doesn't currently support it
1696 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1697 DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
1698 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1699 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1700 DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
1701 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1702 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1703
1704 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1705 , EntryProbe, ReturnProbe) \
1706 \
1707 DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1708 , ReturnProbe);\
1709 \
1710 JNI_ENTRY(ResultType, \
1711 jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1712 JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1713 \
1714 EntryProbe;\
1715 ResultType ret;\
1716 DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1717 (const ResultType&)ret);\
1718 \
1719 JavaValue jvalue(Tag); \
1720 JNI_ArgumentPusherArray ap(methodID, args); \
1721 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1722 ret = jvalue.get_##ResultType(); \
1723 return ret;\
1724 JNI_END
1725
1726 // the runtime type of subword integral basic types is integer
1727 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1728 , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1729 HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1730 DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
1731 , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1732 HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1733 DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
1734 , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735 HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
1737 , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738 HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1739
1740 DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
1741 , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1742 HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1743 DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
1744 , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1745 HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1746 DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
1747 , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748 // Float and double probes don't return value because dtrace doesn't currently support it
1749 HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1750 DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
1751 , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1752 HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1753 DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
1754 , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1755 HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1756
1757 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1758 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1759 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1760 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1761 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1762 , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1763
1764 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1765 JNIWrapper("CallNonvirtualVoidMethod");
1766
1767 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1768 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1769
1770 va_list args;
1771 va_start(args, methodID);
1772 JavaValue jvalue(T_VOID);
1773 JNI_ArgumentPusherVaArg ap(methodID, args);
1774 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1775 va_end(args);
1776 JNI_END
1777
1778
1779 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1780 JNIWrapper("CallNonvirtualVoidMethodV");
1781
1782 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1783 env, obj, cls, (uintptr_t) methodID);
1784 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1785
1786 JavaValue jvalue(T_VOID);
1787 JNI_ArgumentPusherVaArg ap(methodID, args);
1788 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1789 JNI_END
1790
1791
1792 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1793 JNIWrapper("CallNonvirtualVoidMethodA");
1794 HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1795 env, obj, cls, (uintptr_t) methodID);
1796 DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1797 JavaValue jvalue(T_VOID);
1798 JNI_ArgumentPusherArray ap(methodID, args);
1799 jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1800 JNI_END
1801
1802
1803
1804 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1805 , EntryProbe, ResultProbe) \
1806 \
1807 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1808 , ResultProbe); \
1809 \
1810 JNI_ENTRY(ResultType, \
1811 jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1812 JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1813 \
1814 EntryProbe; \
1815 ResultType ret = 0;\
1816 DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1817 (const ResultType&)ret);\
1818 \
1819 va_list args; \
1820 va_start(args, methodID); \
1821 JavaValue jvalue(Tag); \
1822 JNI_ArgumentPusherVaArg ap(methodID, args); \
1823 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1824 va_end(args); \
1825 ret = jvalue.get_##ResultType(); \
1826 return ret;\
1827 JNI_END
1828
1829 // the runtime type of subword integral basic types is integer
1830 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1831 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1832 HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1833 DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
1834 , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1835 HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1836 DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
1837 , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838 HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
1840 , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841 HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1842
1843 DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
1844 , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1845 HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1846 DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
1847 , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1848 HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1849 DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
1850 , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851 HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1852 // Float and double probes don't return value because dtrace doesn't currently support it
1853 DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
1854 , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1855 HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1856 DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
1857 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1858 HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1859
1860 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1861 , EntryProbe, ResultProbe) \
1862 \
1863 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1864 , ResultProbe); \
1865 \
1866 JNI_ENTRY(ResultType, \
1867 jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1868 JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1869 \
1870 EntryProbe; \
1871 ResultType ret = 0;\
1872 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1873 (const ResultType&)ret);\
1874 \
1875 JavaValue jvalue(Tag); \
1876 JNI_ArgumentPusherVaArg ap(methodID, args); \
1877 /* Make sure class is initialized before trying to invoke its method */ \
1878 KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1879 k()->initialize(CHECK_0); \
1880 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1881 va_end(args); \
1882 ret = jvalue.get_##ResultType(); \
1883 return ret;\
1884 JNI_END
1885
1886 // the runtime type of subword integral basic types is integer
1887 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1888 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1889 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1890 DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
1891 , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1892 HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1893 DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
1894 , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895 HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
1897 , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898 HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1899
1900 DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
1901 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1902 HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1903 DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
1904 , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1905 HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1906 DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
1907 , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908 HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1909 // Float and double probes don't return value because dtrace doesn't currently support it
1910 DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
1911 , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1912 HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1913 DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
1914 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1915 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1916
1917 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1918 , EntryProbe, ResultProbe) \
1919 \
1920 DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1921 , ResultProbe); \
1922 \
1923 JNI_ENTRY(ResultType, \
1924 jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1925 JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1926 \
1927 EntryProbe; \
1928 ResultType ret = 0;\
1929 DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1930 (const ResultType&)ret);\
1931 \
1932 JavaValue jvalue(Tag); \
1933 JNI_ArgumentPusherArray ap(methodID, args); \
1934 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1935 ret = jvalue.get_##ResultType(); \
1936 return ret;\
1937 JNI_END
1938
1939 // the runtime type of subword integral basic types is integer
1940 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1941 , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1942 HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1943 DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
1944 , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1945 HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1946 DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
1947 , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948 HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
1950 , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951 HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1952
1953 DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
1954 , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1955 HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1956 DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
1957 , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1958 HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1959 DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
1960 , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961 HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1962 // Float and double probes don't return value because dtrace doesn't currently support it
1963 DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
1964 , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1965 HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1966 DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
1967 , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1968 HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1969
1970 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1971 , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1972 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1973 , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1974 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1975 , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1976
1977 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1978 JNIWrapper("CallStaticVoidMethod");
1979 HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1980 DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1981
1982 va_list args;
1983 va_start(args, methodID);
1984 JavaValue jvalue(T_VOID);
1985 JNI_ArgumentPusherVaArg ap(methodID, args);
1986 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1987 va_end(args);
1988 JNI_END
1989
1990
1991 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1992 JNIWrapper("CallStaticVoidMethodV");
1993 HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1994 DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1995
1996 JavaValue jvalue(T_VOID);
1997 JNI_ArgumentPusherVaArg ap(methodID, args);
1998 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1999 JNI_END
2000
2001
2002 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2003 JNIWrapper("CallStaticVoidMethodA");
2004 HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2005 DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2006
2007 JavaValue jvalue(T_VOID);
2008 JNI_ArgumentPusherArray ap(methodID, args);
2009 jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2010 JNI_END
2011
2012
2013 //
2014 // Accessing Fields
2015 //
2016
2017
2018 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2019 , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2020
2021 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2022 const char *name, const char *sig))
2023 JNIWrapper("GetFieldID");
2024 HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2025 jfieldID ret = 0;
2026 DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2027
2028 // The class should have been loaded (we have an instance of the class
2029 // passed in) so the field and signature should already be in the symbol
2030 // table. If they're not there, the field doesn't exist.
2031 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2032 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2033 if (fieldname == NULL || signame == NULL) {
2034 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2035 }
2036 KlassHandle k(THREAD,
2037 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2038 // Make sure class is initialized before handing id's out to fields
2039 k()->initialize(CHECK_NULL);
2040
2041 fieldDescriptor fd;
2042 if (!k()->is_instance_klass() ||
2043 !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2044 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2045 }
2046
2047 // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2048 // It may also have hash bits for k, if VerifyJNIFields is turned on.
2049 ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2050 return ret;
2051 JNI_END
2052
2053
2054 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2055 JNIWrapper("GetObjectField");
2056 HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2057 oop o = JNIHandles::resolve_non_null(obj);
2058 Klass* k = o->klass();
2059 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2060 // Keep JVMTI addition small and only check enabled flag here.
2061 // jni_GetField_probe() assumes that is okay to create handles.
2062 if (JvmtiExport::should_post_field_access()) {
2063 o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2064 }
2065 jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2066 #if INCLUDE_ALL_GCS
2067 // If G1 is enabled and we are accessing the value of the referent
2068 // field in a reference object then we need to register a non-null
2069 // referent with the SATB barrier.
2070 if (UseG1GC) {
2071 bool needs_barrier = false;
2072
2073 if (ret != NULL &&
2074 offset == java_lang_ref_Reference::referent_offset &&
2075 InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2076 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2077 needs_barrier = true;
2078 }
2079
2080 if (needs_barrier) {
2081 oop referent = JNIHandles::resolve(ret);
2082 G1SATBCardTableModRefBS::enqueue(referent);
2083 }
2084 }
2085 #endif // INCLUDE_ALL_GCS
2086 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2087 return ret;
2088 JNI_END
2089
2090
2091
2092 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2093 , EntryProbe, ReturnProbe) \
2094 \
2095 DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2096 , ReturnProbe); \
2097 \
2098 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2099 JNIWrapper("Get" XSTR(Result) "Field"); \
2100 \
2101 EntryProbe; \
2102 Return ret = 0;\
2103 DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2104 \
2105 oop o = JNIHandles::resolve_non_null(obj); \
2106 Klass* k = o->klass(); \
2107 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2108 /* Keep JVMTI addition small and only check enabled flag here. */ \
2109 /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2110 /* and creates a ResetNoHandleMark. */ \
2111 if (JvmtiExport::should_post_field_access()) { \
2112 o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2113 } \
2114 ret = o->Fieldname##_field(offset); \
2115 return ret; \
2116 JNI_END
2117
2118 DEFINE_GETFIELD(jboolean, bool, Boolean
2119 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2120 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2121 DEFINE_GETFIELD(jbyte, byte, Byte
2122 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2123 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2124 DEFINE_GETFIELD(jchar, char, Char
2125 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2127 DEFINE_GETFIELD(jshort, short, Short
2128 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2130 DEFINE_GETFIELD(jint, int, Int
2131 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jlong, long, Long
2134 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2136 // Float and double probes don't return value because dtrace doesn't currently support it
2137 DEFINE_GETFIELD(jfloat, float, Float
2138 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2139 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2140 DEFINE_GETFIELD(jdouble, double, Double
2141 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2142 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2143
2144 address jni_GetBooleanField_addr() {
2145 return (address)jni_GetBooleanField;
2146 }
2147 address jni_GetByteField_addr() {
2148 return (address)jni_GetByteField;
2149 }
2150 address jni_GetCharField_addr() {
2151 return (address)jni_GetCharField;
2152 }
2153 address jni_GetShortField_addr() {
2154 return (address)jni_GetShortField;
2155 }
2156 address jni_GetIntField_addr() {
2157 return (address)jni_GetIntField;
2158 }
2159 address jni_GetLongField_addr() {
2160 return (address)jni_GetLongField;
2161 }
2162 address jni_GetFloatField_addr() {
2163 return (address)jni_GetFloatField;
2164 }
2165 address jni_GetDoubleField_addr() {
2166 return (address)jni_GetDoubleField;
2167 }
2168
2169 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2170 JNIWrapper("SetObjectField");
2171 HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2172 oop o = JNIHandles::resolve_non_null(obj);
2173 Klass* k = o->klass();
2174 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2175 // Keep JVMTI addition small and only check enabled flag here.
2176 // jni_SetField_probe_nh() assumes that is not okay to create handles
2177 // and creates a ResetNoHandleMark.
2178 if (JvmtiExport::should_post_field_modification()) {
2179 jvalue field_value;
2180 field_value.l = value;
2181 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2182 }
2183 o->obj_field_put(offset, JNIHandles::resolve(value));
2184 HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2185 JNI_END
2186
2187
2188 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2189 , EntryProbe, ReturnProbe) \
2190 \
2191 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2192 JNIWrapper("Set" XSTR(Result) "Field"); \
2193 \
2194 EntryProbe; \
2195 \
2196 oop o = JNIHandles::resolve_non_null(obj); \
2197 Klass* k = o->klass(); \
2198 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
2199 /* Keep JVMTI addition small and only check enabled flag here. */ \
2200 /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2201 /* and creates a ResetNoHandleMark. */ \
2202 if (JvmtiExport::should_post_field_modification()) { \
2203 jvalue field_value; \
2204 field_value.unionType = value; \
2205 o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2206 } \
2207 o->Fieldname##_field_put(offset, value); \
2208 ReturnProbe; \
2209 JNI_END
2210
2211 DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
2212 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2213 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2214 DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
2215 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2216 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2217 DEFINE_SETFIELD(jchar, char, Char, 'C', c
2218 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2219 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2220 DEFINE_SETFIELD(jshort, short, Short, 'S', s
2221 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2222 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2223 DEFINE_SETFIELD(jint, int, Int, 'I', i
2224 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2225 HOTSPOT_JNI_SETINTFIELD_RETURN())
2226 DEFINE_SETFIELD(jlong, long, Long, 'J', j
2227 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2228 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2229 // Float and double probes don't return value because dtrace doesn't currently support it
2230 DEFINE_SETFIELD(jfloat, float, Float, 'F', f
2231 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2232 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2233 DEFINE_SETFIELD(jdouble, double, Double, 'D', d
2234 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2235 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2236
2237 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2238 , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2239
2240 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2241 JNIWrapper("ToReflectedField");
2242 HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2243 jobject ret = NULL;
2244 DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2245
2246 fieldDescriptor fd;
2247 bool found = false;
2248 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2249
2250 assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2251
2252 if (isStatic) {
2253 // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2254 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2255 assert(id->is_static_field_id(), "invalid static field id");
2256 found = id->find_local_field(&fd);
2257 } else {
2258 // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2259 int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2260 found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2261 }
2262 assert(found, "bad fieldID passed into jni_ToReflectedField");
2263 oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2264 ret = JNIHandles::make_local(env, reflected);
2265 return ret;
2266 JNI_END
2267
2268
2269 //
2270 // Accessing Static Fields
2271 //
2272 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2273 , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2274
2275 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2276 const char *name, const char *sig))
2277 JNIWrapper("GetStaticFieldID");
2278 HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2279 jfieldID ret = NULL;
2280 DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2281
2282 // The class should have been loaded (we have an instance of the class
2283 // passed in) so the field and signature should already be in the symbol
2284 // table. If they're not there, the field doesn't exist.
2285 TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2286 TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2287 if (fieldname == NULL || signame == NULL) {
2288 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2289 }
2290 KlassHandle k(THREAD,
2291 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2292 // Make sure class is initialized before handing id's out to static fields
2293 k()->initialize(CHECK_NULL);
2294
2295 fieldDescriptor fd;
2296 if (!k()->is_instance_klass() ||
2297 !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2298 THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2299 }
2300
2301 // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2302 JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2303 debug_only(id->set_is_static_field_id();)
2304
2305 debug_only(id->verify(fd.field_holder()));
2306
2307 ret = jfieldIDWorkaround::to_static_jfieldID(id);
2308 return ret;
2309 JNI_END
2310
2311
2312 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2313 JNIWrapper("GetStaticObjectField");
2314 HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2315 #if INCLUDE_JNI_CHECK
2316 DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2317 #endif // INCLUDE_JNI_CHECK
2318 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2319 assert(id->is_static_field_id(), "invalid static field id");
2320 // Keep JVMTI addition small and only check enabled flag here.
2321 // jni_GetField_probe() assumes that is okay to create handles.
2322 if (JvmtiExport::should_post_field_access()) {
2323 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2324 }
2325 jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2326 HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2327 return ret;
2328 JNI_END
2329
2330
2331 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2332 , EntryProbe, ReturnProbe) \
2333 \
2334 DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2335 , ReturnProbe); \
2336 \
2337 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2338 JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2339 EntryProbe; \
2340 Return ret = 0;\
2341 DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2342 (const Return&)ret);\
2343 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2344 assert(id->is_static_field_id(), "invalid static field id"); \
2345 /* Keep JVMTI addition small and only check enabled flag here. */ \
2346 /* jni_GetField_probe() assumes that is okay to create handles. */ \
2347 if (JvmtiExport::should_post_field_access()) { \
2348 JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2349 } \
2350 ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2351 return ret;\
2352 JNI_END
2353
2354 DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
2355 , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2356 DEFINE_GETSTATICFIELD(jbyte, byte, Byte
2357 , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
2358 DEFINE_GETSTATICFIELD(jchar, char, Char
2359 , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
2360 DEFINE_GETSTATICFIELD(jshort, short, Short
2361 , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
2362 DEFINE_GETSTATICFIELD(jint, int, Int
2363 , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
2364 DEFINE_GETSTATICFIELD(jlong, long, Long
2365 , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
2366 // Float and double probes don't return value because dtrace doesn't currently support it
2367 DEFINE_GETSTATICFIELD(jfloat, float, Float
2368 , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
2369 DEFINE_GETSTATICFIELD(jdouble, double, Double
2370 , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
2371
2372 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2373 JNIWrapper("SetStaticObjectField");
2374 HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2375 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2376 assert(id->is_static_field_id(), "invalid static field id");
2377 // Keep JVMTI addition small and only check enabled flag here.
2378 // jni_SetField_probe() assumes that is okay to create handles.
2379 if (JvmtiExport::should_post_field_modification()) {
2380 jvalue field_value;
2381 field_value.l = value;
2382 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2383 }
2384 id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2385 HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2386 JNI_END
2387
2388
2389
2390 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2391 , EntryProbe, ReturnProbe) \
2392 \
2393 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2394 JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2395 EntryProbe; \
2396 \
2397 JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2398 assert(id->is_static_field_id(), "invalid static field id"); \
2399 /* Keep JVMTI addition small and only check enabled flag here. */ \
2400 /* jni_SetField_probe() assumes that is okay to create handles. */ \
2401 if (JvmtiExport::should_post_field_modification()) { \
2402 jvalue field_value; \
2403 field_value.unionType = value; \
2404 JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2405 } \
2406 id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2407 ReturnProbe;\
2408 JNI_END
2409
2410 DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
2411 , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2412 HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2413 DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
2414 , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2415 HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2416 DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
2417 , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2418 HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2419 DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
2420 , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2421 HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2422 DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
2423 , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2424 HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2425 DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
2426 , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2427 HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2428 // Float and double probes don't return value because dtrace doesn't currently support it
2429 DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
2430 , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2431 HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2432 DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
2433 , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2434 HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2435
2436 //
2437 // String Operations
2438 //
2439
2440 // Unicode Interface
2441
2442 DT_RETURN_MARK_DECL(NewString, jstring
2443 , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2444
2445 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2446 JNIWrapper("NewString");
2447 HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2448 jstring ret = NULL;
2449 DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2450 oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2451 ret = (jstring) JNIHandles::make_local(env, string);
2452 return ret;
2453 JNI_END
2454
2455
2456 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2457 JNIWrapper("GetStringLength");
2458 HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2459 jsize ret = 0;
2460 oop s = JNIHandles::resolve_non_null(string);
2461 if (java_lang_String::value(s) != NULL) {
2462 ret = java_lang_String::length(s);
2463 }
2464 HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2465 return ret;
2466 JNI_END
2467
2468
2469 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2470 JNIEnv *env, jstring string, jboolean *isCopy))
2471 JNIWrapper("GetStringChars");
2472 HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2473 jchar* buf = NULL;
2474 oop s = JNIHandles::resolve_non_null(string);
2475 typeArrayOop s_value = java_lang_String::value(s);
2476 if (s_value != NULL) {
2477 int s_len = java_lang_String::length(s);
2478 bool is_latin1 = java_lang_String::is_latin1(s);
2479 buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
2480 /* JNI Specification states return NULL on OOM */
2481 if (buf != NULL) {
2482 if (s_len > 0) {
2483 if (!is_latin1) {
2484 memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2485 } else {
2486 for (int i = 0; i < s_len; i++) {
2487 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2488 }
2489 }
2490 }
2491 buf[s_len] = 0;
2492 //%note jni_5
2493 if (isCopy != NULL) {
2494 *isCopy = JNI_TRUE;
2495 }
2496 }
2497 }
2498 HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2499 return buf;
2500 JNI_END
2501
2502
2503 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2504 JNIWrapper("ReleaseStringChars");
2505 HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2506 //%note jni_6
2507 if (chars != NULL) {
2508 // Since String objects are supposed to be immutable, don't copy any
2509 // new data back. A bad user will have to go after the char array.
2510 FreeHeap((void*) chars);
2511 }
2512 HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2513 JNI_END
2514
2515
2516 // UTF Interface
2517
2518 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2519 , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2520
2521 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2522 JNIWrapper("NewStringUTF");
2523 HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2524 jstring ret;
2525 DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2526
2527 oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2528 ret = (jstring) JNIHandles::make_local(env, result);
2529 return ret;
2530 JNI_END
2531
2532
2533 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2534 JNIWrapper("GetStringUTFLength");
2535 HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2536 jsize ret = 0;
2537 oop java_string = JNIHandles::resolve_non_null(string);
2538 if (java_lang_String::value(java_string) != NULL) {
2539 ret = java_lang_String::utf8_length(java_string);
2540 }
2541 HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2542 return ret;
2543 JNI_END
2544
2545
2546 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2547 JNIWrapper("GetStringUTFChars");
2548 HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2549 char* result = NULL;
2550 oop java_string = JNIHandles::resolve_non_null(string);
2551 if (java_lang_String::value(java_string) != NULL) {
2552 size_t length = java_lang_String::utf8_length(java_string);
2553 /* JNI Specification states return NULL on OOM */
2554 result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2555 if (result != NULL) {
2556 java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2557 if (isCopy != NULL) {
2558 *isCopy = JNI_TRUE;
2559 }
2560 }
2561 }
2562 HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2563 return result;
2564 JNI_END
2565
2566
2567 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2568 JNIWrapper("ReleaseStringUTFChars");
2569 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2570 if (chars != NULL) {
2571 FreeHeap((char*) chars);
2572 }
2573 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2574 JNI_END
2575
2576
2577 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2578 JNIWrapper("GetArrayLength");
2579 HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2580 arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2581 assert(a->is_array(), "must be array");
2582 jsize ret = a->length();
2583 HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2584 return ret;
2585 JNI_END
2586
2587
2588 //
2589 // Object Array Operations
2590 //
2591
2592 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2593 , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2594
2595 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2596 JNIWrapper("NewObjectArray");
2597 HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2598 jobjectArray ret = NULL;
2599 DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2600 KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2601 Klass* ako = ek()->array_klass(CHECK_NULL);
2602 KlassHandle ak = KlassHandle(THREAD, ako);
2603 ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2604 objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2605 oop initial_value = JNIHandles::resolve(initialElement);
2606 if (initial_value != NULL) { // array already initialized with NULL
2607 for (int index = 0; index < length; index++) {
2608 result->obj_at_put(index, initial_value);
2609 }
2610 }
2611 ret = (jobjectArray) JNIHandles::make_local(env, result);
2612 return ret;
2613 JNI_END
2614
2615 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2616 , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2617
2618 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2619 JNIWrapper("GetObjectArrayElement");
2620 HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2621 jobject ret = NULL;
2622 DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2623 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2624 if (a->is_within_bounds(index)) {
2625 ret = JNIHandles::make_local(env, a->obj_at(index));
2626 return ret;
2627 } else {
2628 char buf[jintAsStringSize];
2629 sprintf(buf, "%d", index);
2630 THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2631 }
2632 JNI_END
2633
2634 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2635 , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2636
2637 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2638 JNIWrapper("SetObjectArrayElement");
2639 HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2640 DT_VOID_RETURN_MARK(SetObjectArrayElement);
2641
2642 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2643 oop v = JNIHandles::resolve(value);
2644 if (a->is_within_bounds(index)) {
2645 if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2646 a->obj_at_put(index, v);
2647 } else {
2648 THROW(vmSymbols::java_lang_ArrayStoreException());
2649 }
2650 } else {
2651 char buf[jintAsStringSize];
2652 sprintf(buf, "%d", index);
2653 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2654 }
2655 JNI_END
2656
2657
2658
2659 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2660 ,EntryProbe,ReturnProbe) \
2661 \
2662 DT_RETURN_MARK_DECL(New##Result##Array, Return \
2663 , ReturnProbe); \
2664 \
2665 JNI_ENTRY(Return, \
2666 jni_New##Result##Array(JNIEnv *env, jsize len)) \
2667 JNIWrapper("New" XSTR(Result) "Array"); \
2668 EntryProbe; \
2669 Return ret = NULL;\
2670 DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2671 \
2672 oop obj= oopFactory::Allocator(len, CHECK_0); \
2673 ret = (Return) JNIHandles::make_local(env, obj); \
2674 return ret;\
2675 JNI_END
2676
2677 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
2678 HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2679 HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2680 DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
2681 HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2682 HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2683 DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
2684 HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2685 HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2686 DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
2687 HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2688 HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2689 DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
2690 HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2691 HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2692 DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
2693 HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2694 HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2695 DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
2696 HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2697 HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2698 DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
2699 HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2700 HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2701
2702 // Return an address which will fault if the caller writes to it.
2703
2704 static char* get_bad_address() {
2705 static char* bad_address = NULL;
2706 if (bad_address == NULL) {
2707 size_t size = os::vm_allocation_granularity();
2708 bad_address = os::reserve_memory(size);
2709 if (bad_address != NULL) {
2710 os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2711 /*is_committed*/false);
2712 MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2713 }
2714 }
2715 return bad_address;
2716 }
2717
2718
2719
2720 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2721 , EntryProbe, ReturnProbe) \
2722 \
2723 JNI_QUICK_ENTRY(ElementType*, \
2724 jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2725 JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2726 EntryProbe; \
2727 /* allocate an chunk of memory in c land */ \
2728 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2729 ElementType* result; \
2730 int len = a->length(); \
2731 if (len == 0) { \
2732 /* Empty array: legal but useless, can't return NULL. \
2733 * Return a pointer to something useless. \
2734 * Avoid asserts in typeArrayOop. */ \
2735 result = (ElementType*)get_bad_address(); \
2736 } else { \
2737 /* JNI Specification states return NULL on OOM */ \
2738 result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2739 if (result != NULL) { \
2740 /* copy the array to the c chunk */ \
2741 memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
2742 if (isCopy) { \
2743 *isCopy = JNI_TRUE; \
2744 } \
2745 } \
2746 } \
2747 ReturnProbe; \
2748 return result; \
2749 JNI_END
2750
2751 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2752 , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2753 HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2754 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2755 , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2756 HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2757 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2758 , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2759 HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2760 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2761 , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2762 HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2763 DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
2764 , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2765 HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2766 DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2767 , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768 HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2769 // Float and double probes don't return value because dtrace doesn't currently support it
2770 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2771 , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2772 HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2773 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2774 , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2775 HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2776
2777
2778 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2779 , EntryProbe, ReturnProbe);\
2780 \
2781 JNI_QUICK_ENTRY(void, \
2782 jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2783 ElementType *buf, jint mode)) \
2784 JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2785 EntryProbe; \
2786 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2787 int len = a->length(); \
2788 if (len != 0) { /* Empty array: nothing to free or copy. */ \
2789 if ((mode == 0) || (mode == JNI_COMMIT)) { \
2790 memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2791 } \
2792 if ((mode == 0) || (mode == JNI_ABORT)) { \
2793 FreeHeap(buf); \
2794 } \
2795 } \
2796 ReturnProbe; \
2797 JNI_END
2798
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2800 , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2801 HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
2803 , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2804 HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
2806 , HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2807 HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
2809 , HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2810 HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
2812 , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2813 HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
2815 , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2816 HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
2818 , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2819 HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2820 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
2821 , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2822 HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2823
2824
2825 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2826 , EntryProbe, ReturnProbe); \
2827 DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2828 , ReturnProbe); \
2829 \
2830 JNI_ENTRY(void, \
2831 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2832 jsize len, ElementType *buf)) \
2833 JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2834 EntryProbe; \
2835 DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2836 typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2837 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2838 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2839 } else { \
2840 if (len > 0) { \
2841 int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2842 memcpy((u_char*) buf, \
2843 (u_char*) src->Tag##_at_addr(start), \
2844 len << sc); \
2845 } \
2846 } \
2847 JNI_END
2848
2849 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2850 , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2851 HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2852 DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2853 , HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2854 HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2855 DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2856 , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2857 HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2858 DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2859 , HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2860 HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2861 DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
2862 , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2863 HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2864 DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
2865 , HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2866 HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2867 DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2868 , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2869 HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2870 DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2871 , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2872 HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2873
2874
2875 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2876 , EntryProbe, ReturnProbe); \
2877 DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2878 ,ReturnProbe); \
2879 \
2880 JNI_ENTRY(void, \
2881 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2882 jsize len, const ElementType *buf)) \
2883 JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2884 EntryProbe; \
2885 DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2886 typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2887 if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2888 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2889 } else { \
2890 if (len > 0) { \
2891 int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2892 memcpy((u_char*) dst->Tag##_at_addr(start), \
2893 (u_char*) buf, \
2894 len << sc); \
2895 } \
2896 } \
2897 JNI_END
2898
2899 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2900 , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2901 HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2902 DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
2903 , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2904 HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2905 DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
2906 , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2907 HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2908 DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
2909 , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2910 HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2911 DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
2912 , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2913 HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2914 DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
2915 , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2916 HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2917 DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
2918 , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2919 HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2920 DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
2921 , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2922 HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2923
2924
2925 //
2926 // Interception of natives
2927 //
2928
2929 // The RegisterNatives call being attempted tried to register with a method that
2930 // is not native. Ask JVM TI what prefixes have been specified. Then check
2931 // to see if the native method is now wrapped with the prefixes. See the
2932 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2933 static Method* find_prefixed_native(KlassHandle k,
2934 Symbol* name, Symbol* signature, TRAPS) {
2935 #if INCLUDE_JVMTI
2936 ResourceMark rm(THREAD);
2937 Method* method;
2938 int name_len = name->utf8_length();
2939 char* name_str = name->as_utf8();
2940 int prefix_count;
2941 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2942 for (int i = 0; i < prefix_count; i++) {
2943 char* prefix = prefixes[i];
2944 int prefix_len = (int)strlen(prefix);
2945
2946 // try adding this prefix to the method name and see if it matches another method name
2947 int trial_len = name_len + prefix_len;
2948 char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2949 strcpy(trial_name_str, prefix);
2950 strcat(trial_name_str, name_str);
2951 TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2952 if (trial_name == NULL) {
2953 continue; // no such symbol, so this prefix wasn't used, try the next prefix
2954 }
2955 method = k()->lookup_method(trial_name, signature);
2956 if (method == NULL) {
2957 continue; // signature doesn't match, try the next prefix
2958 }
2959 if (method->is_native()) {
2960 method->set_is_prefixed_native();
2961 return method; // wahoo, we found a prefixed version of the method, return it
2962 }
2963 // found as non-native, so prefix is good, add it, probably just need more prefixes
2964 name_len = trial_len;
2965 name_str = trial_name_str;
2966 }
2967 #endif // INCLUDE_JVMTI
2968 return NULL; // not found
2969 }
2970
2971 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2972 Method* method = k()->lookup_method(name, signature);
2973 if (method == NULL) {
2974 ResourceMark rm;
2975 stringStream st;
2976 st.print("Method %s name or signature does not match",
2977 Method::name_and_sig_as_C_string(k(), name, signature));
2978 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2979 }
2980 if (!method->is_native()) {
2981 // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2982 method = find_prefixed_native(k, name, signature, THREAD);
2983 if (method == NULL) {
2984 ResourceMark rm;
2985 stringStream st;
2986 st.print("Method %s is not declared as native",
2987 Method::name_and_sig_as_C_string(k(), name, signature));
2988 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2989 }
2990 }
2991
2992 if (entry != NULL) {
2993 method->set_native_function(entry,
2994 Method::native_bind_event_is_interesting);
2995 } else {
2996 method->clear_native_function();
2997 }
2998 if (PrintJNIResolving) {
2999 ResourceMark rm(THREAD);
3000 tty->print_cr("[Registering JNI native method %s.%s]",
3001 method->method_holder()->external_name(),
3002 method->name()->as_C_string());
3003 }
3004 return true;
3005 }
3006
3007 DT_RETURN_MARK_DECL(RegisterNatives, jint
3008 , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3009
3010 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3011 const JNINativeMethod *methods,
3012 jint nMethods))
3013 JNIWrapper("RegisterNatives");
3014 HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3015 jint ret = 0;
3016 DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3017
3018 KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3019
3020 for (int index = 0; index < nMethods; index++) {
3021 const char* meth_name = methods[index].name;
3022 const char* meth_sig = methods[index].signature;
3023 int meth_name_len = (int)strlen(meth_name);
3024
3025 // The class should have been loaded (we have an instance of the class
3026 // passed in) so the method and signature should already be in the symbol
3027 // table. If they're not there, the method doesn't exist.
3028 TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
3029 TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3030
3031 if (name == NULL || signature == NULL) {
3032 ResourceMark rm;
3033 stringStream st;
3034 st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3035 // Must return negative value on failure
3036 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3037 }
3038
3039 bool res = register_native(h_k, name, signature,
3040 (address) methods[index].fnPtr, THREAD);
3041 if (!res) {
3042 ret = -1;
3043 break;
3044 }
3045 }
3046 return ret;
3047 JNI_END
3048
3049
3050 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3051 JNIWrapper("UnregisterNatives");
3052 HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3053 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3054 //%note jni_2
3055 if (k->is_instance_klass()) {
3056 for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3057 Method* m = InstanceKlass::cast(k)->methods()->at(index);
3058 if (m->is_native()) {
3059 m->clear_native_function();
3060 m->set_signature_handler(NULL);
3061 }
3062 }
3063 }
3064 HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3065 return 0;
3066 JNI_END
3067
3068 //
3069 // Monitor functions
3070 //
3071
3072 DT_RETURN_MARK_DECL(MonitorEnter, jint
3073 , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3074
3075 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3076 HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3077 jint ret = JNI_ERR;
3078 DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3079
3080 // If the object is null, we can't do anything with it
3081 if (jobj == NULL) {
3082 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3083 }
3084
3085 Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3086 ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3087 ret = JNI_OK;
3088 return ret;
3089 JNI_END
3090
3091 DT_RETURN_MARK_DECL(MonitorExit, jint
3092 , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3093
3094 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3095 HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3096 jint ret = JNI_ERR;
3097 DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3098
3099 // Don't do anything with a null object
3100 if (jobj == NULL) {
3101 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3102 }
3103
3104 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3105 ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3106
3107 ret = JNI_OK;
3108 return ret;
3109 JNI_END
3110
3111 //
3112 // Extensions
3113 //
3114
3115 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3116 , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3117
3118 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3119 JNIWrapper("GetStringRegion");
3120 HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3121 DT_VOID_RETURN_MARK(GetStringRegion);
3122 oop s = JNIHandles::resolve_non_null(string);
3123 int s_len = java_lang_String::length(s);
3124 if (start < 0 || len < 0 || start + len > s_len) {
3125 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3126 } else {
3127 if (len > 0) {
3128 typeArrayOop s_value = java_lang_String::value(s);
3129 bool is_latin1 = java_lang_String::is_latin1(s);
3130 if (!is_latin1) {
3131 memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3132 } else {
3133 for (int i = 0; i < len; i++) {
3134 buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3135 }
3136 }
3137 }
3138 }
3139 JNI_END
3140
3141 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3142 , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3143
3144 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3145 JNIWrapper("GetStringUTFRegion");
3146 HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3147 DT_VOID_RETURN_MARK(GetStringUTFRegion);
3148 oop s = JNIHandles::resolve_non_null(string);
3149 int s_len = java_lang_String::length(s);
3150 if (start < 0 || len < 0 || start + len > s_len) {
3151 THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3152 } else {
3153 //%note jni_7
3154 if (len > 0) {
3155 // Assume the buffer is large enough as the JNI spec. does not require user error checking
3156 java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3157 // as_utf8_string null-terminates the result string
3158 } else {
3159 // JDK null-terminates the buffer even in len is zero
3160 if (buf != NULL) {
3161 buf[0] = 0;
3162 }
3163 }
3164 }
3165 JNI_END
3166
3167
3168 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3169 JNIWrapper("GetPrimitiveArrayCritical");
3170 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3171 GC_locker::lock_critical(thread);
3172 if (isCopy != NULL) {
3173 *isCopy = JNI_FALSE;
3174 }
3175 oop a = JNIHandles::resolve_non_null(array);
3176 assert(a->is_array(), "just checking");
3177 BasicType type;
3178 if (a->is_objArray()) {
3179 type = T_OBJECT;
3180 } else {
3181 type = TypeArrayKlass::cast(a->klass())->element_type();
3182 }
3183 void* ret = arrayOop(a)->base(type);
3184 HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3185 return ret;
3186 JNI_END
3187
3188
3189 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3190 JNIWrapper("ReleasePrimitiveArrayCritical");
3191 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3192 // The array, carray and mode arguments are ignored
3193 GC_locker::unlock_critical(thread);
3194 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3195 JNI_END
3196
3197
3198 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3199 JNIWrapper("GetStringCritical");
3200 HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3201 GC_locker::lock_critical(thread);
3202 oop s = JNIHandles::resolve_non_null(string);
3203 typeArrayOop s_value = java_lang_String::value(s);
3204 bool is_latin1 = java_lang_String::is_latin1(s);
3205 if (isCopy != NULL) {
3206 *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3207 }
3208 const jchar* ret;
3209 if (!is_latin1) {
3210 ret = s_value->char_at_addr(0);
3211 } else {
3212 // Inflate latin1 encoded string to UTF16
3213 int s_len = java_lang_String::length(s);
3214 jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len, mtInternal);
3215 for (int i = 0; i < s_len; i++) {
3216 buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3217 }
3218 ret = &buf[0];
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 GC_locker::unlock_critical(thread);
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 jint directBufferSupportInitializeStarted = 0;
3272 static volatile jint directBufferSupportInitializeEnded = 0;
3273 static volatile jint 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 (TraceClassResolution && 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 DT_RETURN_MARK_DECL(GetModule, jobject, HOTSPOT_JNI_GETMODULE_RETURN(_ret_ref));
3464
3465 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3466 JNIWrapper("GetModule");
3467 HOTSPOT_JNI_GETMODULE_ENTRY(env, clazz);
3468 jobject res;
3469 DT_RETURN_MARK(GetModule, jobject, (const jobject&)res);
3470 res = Modules::get_module(env, clazz);
3471 return res;
3472 JNI_END
3473
3474 JNI_ENTRY(jsize, jni_GetAllModules(JNIEnv* env, jobjectArray *modules))
3475 JNIWrapper("GetAllModules");
3476 jsize count = 0;
3477 count = Modules::get_all_modules(env, modules);
3478 return count;
3479 JNI_END
3480
3481
3482 // Structure containing all jni functions
3483 struct JNINativeInterface_ jni_NativeInterface = {
3484 NULL,
3485 NULL,
3486 NULL,
3487
3488 NULL,
3489
3490 jni_GetVersion,
3491
3492 jni_DefineClass,
3493 jni_FindClass,
3494
3495 jni_FromReflectedMethod,
3496 jni_FromReflectedField,
3497
3498 jni_ToReflectedMethod,
3499
3500 jni_GetSuperclass,
3501 jni_IsAssignableFrom,
3502
3503 jni_ToReflectedField,
3504
3505 jni_Throw,
3506 jni_ThrowNew,
3507 jni_ExceptionOccurred,
3508 jni_ExceptionDescribe,
3509 jni_ExceptionClear,
3510 jni_FatalError,
3511
3512 jni_PushLocalFrame,
3513 jni_PopLocalFrame,
3514
3515 jni_NewGlobalRef,
3516 jni_DeleteGlobalRef,
3517 jni_DeleteLocalRef,
3518 jni_IsSameObject,
3519
3520 jni_NewLocalRef,
3521 jni_EnsureLocalCapacity,
3522
3523 jni_AllocObject,
3524 jni_NewObject,
3525 jni_NewObjectV,
3526 jni_NewObjectA,
3527
3528 jni_GetObjectClass,
3529 jni_IsInstanceOf,
3530
3531 jni_GetMethodID,
3532
3533 jni_CallObjectMethod,
3534 jni_CallObjectMethodV,
3535 jni_CallObjectMethodA,
3536 jni_CallBooleanMethod,
3537 jni_CallBooleanMethodV,
3538 jni_CallBooleanMethodA,
3539 jni_CallByteMethod,
3540 jni_CallByteMethodV,
3541 jni_CallByteMethodA,
3542 jni_CallCharMethod,
3543 jni_CallCharMethodV,
3544 jni_CallCharMethodA,
3545 jni_CallShortMethod,
3546 jni_CallShortMethodV,
3547 jni_CallShortMethodA,
3548 jni_CallIntMethod,
3549 jni_CallIntMethodV,
3550 jni_CallIntMethodA,
3551 jni_CallLongMethod,
3552 jni_CallLongMethodV,
3553 jni_CallLongMethodA,
3554 jni_CallFloatMethod,
3555 jni_CallFloatMethodV,
3556 jni_CallFloatMethodA,
3557 jni_CallDoubleMethod,
3558 jni_CallDoubleMethodV,
3559 jni_CallDoubleMethodA,
3560 jni_CallVoidMethod,
3561 jni_CallVoidMethodV,
3562 jni_CallVoidMethodA,
3563
3564 jni_CallNonvirtualObjectMethod,
3565 jni_CallNonvirtualObjectMethodV,
3566 jni_CallNonvirtualObjectMethodA,
3567 jni_CallNonvirtualBooleanMethod,
3568 jni_CallNonvirtualBooleanMethodV,
3569 jni_CallNonvirtualBooleanMethodA,
3570 jni_CallNonvirtualByteMethod,
3571 jni_CallNonvirtualByteMethodV,
3572 jni_CallNonvirtualByteMethodA,
3573 jni_CallNonvirtualCharMethod,
3574 jni_CallNonvirtualCharMethodV,
3575 jni_CallNonvirtualCharMethodA,
3576 jni_CallNonvirtualShortMethod,
3577 jni_CallNonvirtualShortMethodV,
3578 jni_CallNonvirtualShortMethodA,
3579 jni_CallNonvirtualIntMethod,
3580 jni_CallNonvirtualIntMethodV,
3581 jni_CallNonvirtualIntMethodA,
3582 jni_CallNonvirtualLongMethod,
3583 jni_CallNonvirtualLongMethodV,
3584 jni_CallNonvirtualLongMethodA,
3585 jni_CallNonvirtualFloatMethod,
3586 jni_CallNonvirtualFloatMethodV,
3587 jni_CallNonvirtualFloatMethodA,
3588 jni_CallNonvirtualDoubleMethod,
3589 jni_CallNonvirtualDoubleMethodV,
3590 jni_CallNonvirtualDoubleMethodA,
3591 jni_CallNonvirtualVoidMethod,
3592 jni_CallNonvirtualVoidMethodV,
3593 jni_CallNonvirtualVoidMethodA,
3594
3595 jni_GetFieldID,
3596
3597 jni_GetObjectField,
3598 jni_GetBooleanField,
3599 jni_GetByteField,
3600 jni_GetCharField,
3601 jni_GetShortField,
3602 jni_GetIntField,
3603 jni_GetLongField,
3604 jni_GetFloatField,
3605 jni_GetDoubleField,
3606
3607 jni_SetObjectField,
3608 jni_SetBooleanField,
3609 jni_SetByteField,
3610 jni_SetCharField,
3611 jni_SetShortField,
3612 jni_SetIntField,
3613 jni_SetLongField,
3614 jni_SetFloatField,
3615 jni_SetDoubleField,
3616
3617 jni_GetStaticMethodID,
3618
3619 jni_CallStaticObjectMethod,
3620 jni_CallStaticObjectMethodV,
3621 jni_CallStaticObjectMethodA,
3622 jni_CallStaticBooleanMethod,
3623 jni_CallStaticBooleanMethodV,
3624 jni_CallStaticBooleanMethodA,
3625 jni_CallStaticByteMethod,
3626 jni_CallStaticByteMethodV,
3627 jni_CallStaticByteMethodA,
3628 jni_CallStaticCharMethod,
3629 jni_CallStaticCharMethodV,
3630 jni_CallStaticCharMethodA,
3631 jni_CallStaticShortMethod,
3632 jni_CallStaticShortMethodV,
3633 jni_CallStaticShortMethodA,
3634 jni_CallStaticIntMethod,
3635 jni_CallStaticIntMethodV,
3636 jni_CallStaticIntMethodA,
3637 jni_CallStaticLongMethod,
3638 jni_CallStaticLongMethodV,
3639 jni_CallStaticLongMethodA,
3640 jni_CallStaticFloatMethod,
3641 jni_CallStaticFloatMethodV,
3642 jni_CallStaticFloatMethodA,
3643 jni_CallStaticDoubleMethod,
3644 jni_CallStaticDoubleMethodV,
3645 jni_CallStaticDoubleMethodA,
3646 jni_CallStaticVoidMethod,
3647 jni_CallStaticVoidMethodV,
3648 jni_CallStaticVoidMethodA,
3649
3650 jni_GetStaticFieldID,
3651
3652 jni_GetStaticObjectField,
3653 jni_GetStaticBooleanField,
3654 jni_GetStaticByteField,
3655 jni_GetStaticCharField,
3656 jni_GetStaticShortField,
3657 jni_GetStaticIntField,
3658 jni_GetStaticLongField,
3659 jni_GetStaticFloatField,
3660 jni_GetStaticDoubleField,
3661
3662 jni_SetStaticObjectField,
3663 jni_SetStaticBooleanField,
3664 jni_SetStaticByteField,
3665 jni_SetStaticCharField,
3666 jni_SetStaticShortField,
3667 jni_SetStaticIntField,
3668 jni_SetStaticLongField,
3669 jni_SetStaticFloatField,
3670 jni_SetStaticDoubleField,
3671
3672 jni_NewString,
3673 jni_GetStringLength,
3674 jni_GetStringChars,
3675 jni_ReleaseStringChars,
3676
3677 jni_NewStringUTF,
3678 jni_GetStringUTFLength,
3679 jni_GetStringUTFChars,
3680 jni_ReleaseStringUTFChars,
3681
3682 jni_GetArrayLength,
3683
3684 jni_NewObjectArray,
3685 jni_GetObjectArrayElement,
3686 jni_SetObjectArrayElement,
3687
3688 jni_NewBooleanArray,
3689 jni_NewByteArray,
3690 jni_NewCharArray,
3691 jni_NewShortArray,
3692 jni_NewIntArray,
3693 jni_NewLongArray,
3694 jni_NewFloatArray,
3695 jni_NewDoubleArray,
3696
3697 jni_GetBooleanArrayElements,
3698 jni_GetByteArrayElements,
3699 jni_GetCharArrayElements,
3700 jni_GetShortArrayElements,
3701 jni_GetIntArrayElements,
3702 jni_GetLongArrayElements,
3703 jni_GetFloatArrayElements,
3704 jni_GetDoubleArrayElements,
3705
3706 jni_ReleaseBooleanArrayElements,
3707 jni_ReleaseByteArrayElements,
3708 jni_ReleaseCharArrayElements,
3709 jni_ReleaseShortArrayElements,
3710 jni_ReleaseIntArrayElements,
3711 jni_ReleaseLongArrayElements,
3712 jni_ReleaseFloatArrayElements,
3713 jni_ReleaseDoubleArrayElements,
3714
3715 jni_GetBooleanArrayRegion,
3716 jni_GetByteArrayRegion,
3717 jni_GetCharArrayRegion,
3718 jni_GetShortArrayRegion,
3719 jni_GetIntArrayRegion,
3720 jni_GetLongArrayRegion,
3721 jni_GetFloatArrayRegion,
3722 jni_GetDoubleArrayRegion,
3723
3724 jni_SetBooleanArrayRegion,
3725 jni_SetByteArrayRegion,
3726 jni_SetCharArrayRegion,
3727 jni_SetShortArrayRegion,
3728 jni_SetIntArrayRegion,
3729 jni_SetLongArrayRegion,
3730 jni_SetFloatArrayRegion,
3731 jni_SetDoubleArrayRegion,
3732
3733 jni_RegisterNatives,
3734 jni_UnregisterNatives,
3735
3736 jni_MonitorEnter,
3737 jni_MonitorExit,
3738
3739 jni_GetJavaVM,
3740
3741 jni_GetStringRegion,
3742 jni_GetStringUTFRegion,
3743
3744 jni_GetPrimitiveArrayCritical,
3745 jni_ReleasePrimitiveArrayCritical,
3746
3747 jni_GetStringCritical,
3748 jni_ReleaseStringCritical,
3749
3750 jni_NewWeakGlobalRef,
3751 jni_DeleteWeakGlobalRef,
3752
3753 jni_ExceptionCheck,
3754
3755 jni_NewDirectByteBuffer,
3756 jni_GetDirectBufferAddress,
3757 jni_GetDirectBufferCapacity,
3758
3759 // New 1_6 features
3760
3761 jni_GetObjectRefType,
3762
3763 // Module features
3764
3765 jni_GetModule,
3766 jni_GetAllModules
3767 };
3768
3769
3770 // For jvmti use to modify jni function table.
3771 // Java threads in native contiues to run until it is transitioned
3772 // to VM at safepoint. Before the transition or before it is blocked
3773 // for safepoint it may access jni function table. VM could crash if
3774 // any java thread access the jni function table in the middle of memcpy.
3775 // To avoid this each function pointers are copied automically.
3776 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3777 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3778 intptr_t *a = (intptr_t *) jni_functions();
3779 intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3780 for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3781 Atomic::store_ptr(*b++, a++);
3782 }
3783 }
3784
3785 void quicken_jni_functions() {
3786 // Replace Get<Primitive>Field with fast versions
3787 if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3788 && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3789 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3790 // windows x86 currently needs SEH wrapper and the gain of the fast
3791 // versions currently isn't certain for server vm on uniprocessor.
3792 && os::is_MP()
3793 #endif
3794 ) {
3795 address func;
3796 func = JNI_FastGetField::generate_fast_get_boolean_field();
3797 if (func != (address)-1) {
3798 jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3799 }
3800 func = JNI_FastGetField::generate_fast_get_byte_field();
3801 if (func != (address)-1) {
3802 jni_NativeInterface.GetByteField = (GetByteField_t)func;
3803 }
3804 func = JNI_FastGetField::generate_fast_get_char_field();
3805 if (func != (address)-1) {
3806 jni_NativeInterface.GetCharField = (GetCharField_t)func;
3807 }
3808 func = JNI_FastGetField::generate_fast_get_short_field();
3809 if (func != (address)-1) {
3810 jni_NativeInterface.GetShortField = (GetShortField_t)func;
3811 }
3812 func = JNI_FastGetField::generate_fast_get_int_field();
3813 if (func != (address)-1) {
3814 jni_NativeInterface.GetIntField = (GetIntField_t)func;
3815 }
3816 func = JNI_FastGetField::generate_fast_get_long_field();
3817 if (func != (address)-1) {
3818 jni_NativeInterface.GetLongField = (GetLongField_t)func;
3819 }
3820 func = JNI_FastGetField::generate_fast_get_float_field();
3821 if (func != (address)-1) {
3822 jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3823 }
3824 func = JNI_FastGetField::generate_fast_get_double_field();
3825 if (func != (address)-1) {
3826 jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3827 }
3828 }
3829 }
3830
3831 // Returns the function structure
3832 struct JNINativeInterface_* jni_functions() {
3833 #if INCLUDE_JNI_CHECK
3834 if (CheckJNICalls) return jni_functions_check();
3835 #endif // INCLUDE_JNI_CHECK
3836 return &jni_NativeInterface;
3837 }
3838
3839 // Returns the function structure
3840 struct JNINativeInterface_* jni_functions_nocheck() {
3841 return &jni_NativeInterface;
3842 }
3843
3844
3845 // Invocation API
3846
3847
3848 // Forward declaration
3849 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3850
3851 // Global invocation API vars
3852 volatile jint vm_created = 0;
3853 // Indicate whether it is safe to recreate VM
3854 volatile jint safe_to_recreate_vm = 1;
3855 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3856
3857
3858 #define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
3859 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3860
3861 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3862 , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3863
3864 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3865 HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3866 JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3867 jint ret = JNI_ERR;
3868 DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3869
3870 if (Threads::is_supported_jni_version(args->version)) {
3871 ret = JNI_OK;
3872 }
3873 // 1.1 style no longer supported in hotspot.
3874 // According the JNI spec, we should update args->version on return.
3875 // We also use the structure to communicate with launcher about default
3876 // stack size.
3877 if (args->version == JNI_VERSION_1_1) {
3878 args->version = JNI_VERSION_1_2;
3879 // javaStackSize is int in arguments structure
3880 assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3881 args->javaStackSize = (jint)(ThreadStackSize * K);
3882 }
3883 return ret;
3884 }
3885
3886 #ifndef PRODUCT
3887
3888 #include "gc/shared/collectedHeap.hpp"
3889 #include "gc/shared/gcTimer.hpp"
3890 #if INCLUDE_ALL_GCS
3891 #include "gc/g1/heapRegionRemSet.hpp"
3892 #endif
3893 #include "compiler/directivesParser.hpp"
3894 #include "memory/guardedMemory.hpp"
3895 #include "utilities/json.hpp"
3896 #include "utilities/ostream.hpp"
3897 #include "utilities/quickSort.hpp"
3898 #if INCLUDE_VM_STRUCTS
3899 #include "runtime/vmStructs.hpp"
3900 #endif
3901
3902 #define run_unit_test(unit_test_function_call) \
3903 tty->print_cr("Running test: " #unit_test_function_call); \
3904 unit_test_function_call
3905
3906 // Forward declaration
3907 void TestNmethodBucket_test();
3908 void test_semaphore();
3909 void TestOS_test();
3910 void TestReservedSpace_test();
3911 void TestReserveMemorySpecial_test();
3912 void TestVirtualSpace_test();
3913 void TestMetaspaceAux_test();
3914 void TestMetachunk_test();
3915 void TestVirtualSpaceNode_test();
3916 void TestNewSize_test();
3917 void TestOldSize_test();
3918 void TestKlass_test();
3919 void TestBitMap_test();
3920 void TestAsUtf8();
3921 void Test_linked_list();
3922 void TestResourcehash_test();
3923 void TestChunkedList_test();
3924 void Test_log_length();
3925 #if INCLUDE_ALL_GCS
3926 void TestOldFreeSpaceCalculation_test();
3927 void TestG1BiasedArray_test();
3928 void TestBufferingOopClosure_test();
3929 void TestCodeCacheRemSet_test();
3930 void FreeRegionList_test();
3931 void test_memset_with_concurrent_readers();
3932 void TestPredictions_test();
3933 void WorkerDataArray_test();
3934 #endif
3935
3936 void execute_internal_vm_tests() {
3937 if (ExecuteInternalVMTests) {
3938 tty->print_cr("Running internal VM tests");
3939 run_unit_test(TestNmethodBucket_test());
3940 run_unit_test(test_semaphore());
3941 run_unit_test(TestOS_test());
3942 run_unit_test(TestReservedSpace_test());
3943 run_unit_test(TestReserveMemorySpecial_test());
3944 run_unit_test(TestVirtualSpace_test());
3945 run_unit_test(TestMetaspaceAux_test());
3946 run_unit_test(TestMetachunk_test());
3947 run_unit_test(TestVirtualSpaceNode_test());
3948 run_unit_test(GlobalDefinitions::test_globals());
3949 run_unit_test(GCTimerAllTest::all());
3950 run_unit_test(arrayOopDesc::test_max_array_length());
3951 run_unit_test(CollectedHeap::test_is_in());
3952 run_unit_test(QuickSort::test_quick_sort());
3953 run_unit_test(GuardedMemory::test_guarded_memory());
3954 run_unit_test(AltHashing::test_alt_hash());
3955 run_unit_test(test_loggc_filename());
3956 run_unit_test(TestNewSize_test());
3957 run_unit_test(TestOldSize_test());
3958 run_unit_test(TestKlass_test());
3959 run_unit_test(TestBitMap_test());
3960 run_unit_test(TestAsUtf8());
3961 run_unit_test(TestResourcehash_test());
3962 run_unit_test(ObjectMonitor::sanity_checks());
3963 run_unit_test(Test_linked_list());
3964 run_unit_test(TestChunkedList_test());
3965 run_unit_test(JSONTest::test());
3966 run_unit_test(Test_log_length());
3967 run_unit_test(DirectivesParser::test());
3968 #if INCLUDE_VM_STRUCTS
3969 run_unit_test(VMStructs::test());
3970 #endif
3971 #if INCLUDE_ALL_GCS
3972 run_unit_test(TestOldFreeSpaceCalculation_test());
3973 run_unit_test(TestG1BiasedArray_test());
3974 run_unit_test(HeapRegionRemSet::test_prt());
3975 run_unit_test(TestBufferingOopClosure_test());
3976 run_unit_test(TestCodeCacheRemSet_test());
3977 if (UseG1GC) {
3978 run_unit_test(FreeRegionList_test());
3979 }
3980 run_unit_test(test_memset_with_concurrent_readers());
3981 run_unit_test(TestPredictions_test());
3982 run_unit_test(WorkerDataArray_test());
3983 #endif
3984 tty->print_cr("All internal VM tests passed");
3985 }
3986 }
3987
3988 #undef run_unit_test
3989
3990 #endif
3991
3992 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3993 , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3994
3995 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3996 HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3997
3998 jint result = JNI_ERR;
3999 DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
4000
4001 // We're about to use Atomic::xchg for synchronization. Some Zero
4002 // platforms use the GCC builtin __sync_lock_test_and_set for this,
4003 // but __sync_lock_test_and_set is not guaranteed to do what we want
4004 // on all architectures. So we check it works before relying on it.
4005 #if defined(ZERO) && defined(ASSERT)
4006 {
4007 jint a = 0xcafebabe;
4008 jint b = Atomic::xchg(0xdeadbeef, &a);
4009 void *c = &a;
4010 void *d = Atomic::xchg_ptr(&b, &c);
4011 assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
4012 assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
4013 }
4014 #endif // ZERO && ASSERT
4015
4016 // At the moment it's only possible to have one Java VM,
4017 // since some of the runtime state is in global variables.
4018
4019 // We cannot use our mutex locks here, since they only work on
4020 // Threads. We do an atomic compare and exchange to ensure only
4021 // one thread can call this method at a time
4022
4023 // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
4024 // the add/dec implementations are dependent on whether we are running
4025 // on a multiprocessor, and at this stage of initialization the os::is_MP
4026 // function used to determine this will always return false. Atomic::xchg
4027 // does not have this problem.
4028 if (Atomic::xchg(1, &vm_created) == 1) {
4029 return JNI_EEXIST; // already created, or create attempt in progress
4030 }
4031 if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
4032 return JNI_ERR; // someone tried and failed and retry not allowed.
4033 }
4034
4035 assert(vm_created == 1, "vm_created is true during the creation");
4036
4037 /**
4038 * Certain errors during initialization are recoverable and do not
4039 * prevent this method from being called again at a later time
4040 * (perhaps with different arguments). However, at a certain
4041 * point during initialization if an error occurs we cannot allow
4042 * this function to be called again (or it will crash). In those
4043 * situations, the 'canTryAgain' flag is set to false, which atomically
4044 * sets safe_to_recreate_vm to 1, such that any new call to
4045 * JNI_CreateJavaVM will immediately fail using the above logic.
4046 */
4047 bool can_try_again = true;
4048
4049 result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
4050 if (result == JNI_OK) {
4051 JavaThread *thread = JavaThread::current();
4052 assert(!thread->has_pending_exception(), "should have returned not OK");
4053 /* thread is thread_in_vm here */
4054 *vm = (JavaVM *)(&main_vm);
4055 *(JNIEnv**)penv = thread->jni_environment();
4056
4057 #if INCLUDE_JVMCI
4058 if (EnableJVMCI) {
4059 if (UseJVMCICompiler) {
4060 // JVMCI is initialized on a CompilerThread
4061 if (BootstrapJVMCI) {
4062 JavaThread* THREAD = thread;
4063 JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
4064 compiler->bootstrap();
4065 }
4066 }
4067 }
4068 #endif
4069
4070 // Tracks the time application was running before GC
4071 RuntimeService::record_application_start();
4072
4073 // Notify JVMTI
4074 if (JvmtiExport::should_post_thread_life()) {
4075 JvmtiExport::post_thread_start(thread);
4076 }
4077
4078 EventThreadStart event;
4079 if (event.should_commit()) {
4080 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4081 event.commit();
4082 }
4083
4084 #ifndef PRODUCT
4085 // Check if we should compile all classes on bootclasspath
4086 if (CompileTheWorld) ClassLoader::compile_the_world();
4087 if (ReplayCompiles) ciReplay::replay(thread);
4088
4089 // Some platforms (like Win*) need a wrapper around these test
4090 // functions in order to properly handle error conditions.
4091 test_error_handler();
4092 execute_internal_vm_tests();
4093 #endif
4094
4095 // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4096 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4097 } else {
4098 // If create_vm exits because of a pending exception, exit with that
4099 // exception. In the future when we figure out how to reclaim memory,
4100 // we may be able to exit with JNI_ERR and allow the calling application
4101 // to continue.
4102 if (Universe::is_fully_initialized()) {
4103 // otherwise no pending exception possible - VM will already have aborted
4104 JavaThread* THREAD = JavaThread::current();
4105 if (HAS_PENDING_EXCEPTION) {
4106 HandleMark hm;
4107 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4108 }
4109 }
4110
4111 if (can_try_again) {
4112 // reset safe_to_recreate_vm to 1 so that retrial would be possible
4113 safe_to_recreate_vm = 1;
4114 }
4115
4116 // Creation failed. We must reset vm_created
4117 *vm = 0;
4118 *(JNIEnv**)penv = 0;
4119 // reset vm_created last to avoid race condition. Use OrderAccess to
4120 // control both compiler and architectural-based reordering.
4121 OrderAccess::release_store(&vm_created, 0);
4122 }
4123
4124 // Flush stdout and stderr before exit.
4125 fflush(stdout);
4126 fflush(stderr);
4127
4128 return result;
4129
4130 }
4131
4132 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4133 jint result = 0;
4134 // On Windows, let CreateJavaVM run with SEH protection
4135 #ifdef _WIN32
4136 __try {
4137 #endif
4138 result = JNI_CreateJavaVM_inner(vm, penv, args);
4139 #ifdef _WIN32
4140 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4141 // Nothing to do.
4142 }
4143 #endif
4144 return result;
4145 }
4146
4147 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4148 // See bug 4367188, the wrapper can sometimes cause VM crashes
4149 // JNIWrapper("GetCreatedJavaVMs");
4150
4151 HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4152
4153 if (vm_created) {
4154 if (numVMs != NULL) *numVMs = 1;
4155 if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
4156 } else {
4157 if (numVMs != NULL) *numVMs = 0;
4158 }
4159 HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4160 return JNI_OK;
4161 }
4162
4163 extern "C" {
4164
4165 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4166 , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4167
4168 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4169 HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4170 jint res = JNI_ERR;
4171 DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4172
4173 if (!vm_created) {
4174 res = JNI_ERR;
4175 return res;
4176 }
4177
4178 JNIWrapper("DestroyJavaVM");
4179 JNIEnv *env;
4180 JavaVMAttachArgs destroyargs;
4181 destroyargs.version = CurrentVersion;
4182 destroyargs.name = (char *)"DestroyJavaVM";
4183 destroyargs.group = NULL;
4184 res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4185 if (res != JNI_OK) {
4186 return res;
4187 }
4188
4189 // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4190 JavaThread* thread = JavaThread::current();
4191 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4192 if (Threads::destroy_vm()) {
4193 // Should not change thread state, VM is gone
4194 vm_created = false;
4195 res = JNI_OK;
4196 return res;
4197 } else {
4198 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4199 res = JNI_ERR;
4200 return res;
4201 }
4202 }
4203
4204
4205 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4206 JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4207
4208 // Check below commented out from JDK1.2fcs as well
4209 /*
4210 if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4211 return JNI_EVERSION;
4212 }
4213 */
4214
4215 Thread* t = ThreadLocalStorage::get_thread_slow();
4216 if (t != NULL) {
4217 // If the thread has been attached this operation is a no-op
4218 *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4219 return JNI_OK;
4220 }
4221
4222 // Create a thread and mark it as attaching so it will be skipped by the
4223 // ThreadsListEnumerator - see CR 6404306
4224 JavaThread* thread = new JavaThread(true);
4225
4226 // Set correct safepoint info. The thread is going to call into Java when
4227 // initializing the Java level thread object. Hence, the correct state must
4228 // be set in order for the Safepoint code to deal with it correctly.
4229 thread->set_thread_state(_thread_in_vm);
4230 // Must do this before initialize_thread_local_storage
4231 thread->record_stack_base_and_size();
4232
4233 thread->initialize_thread_local_storage();
4234
4235 if (!os::create_attached_thread(thread)) {
4236 delete thread;
4237 return JNI_ERR;
4238 }
4239 // Enable stack overflow checks
4240 thread->create_stack_guard_pages();
4241
4242 thread->initialize_tlab();
4243
4244 thread->cache_global_variables();
4245
4246 // Crucial that we do not have a safepoint check for this thread, since it has
4247 // not been added to the Thread list yet.
4248 { Threads_lock->lock_without_safepoint_check();
4249 // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4250 // avoid this thread trying to do a GC before it is added to the thread-list
4251 thread->set_active_handles(JNIHandleBlock::allocate_block());
4252 Threads::add(thread, daemon);
4253 Threads_lock->unlock();
4254 }
4255 // Create thread group and name info from attach arguments
4256 oop group = NULL;
4257 char* thread_name = NULL;
4258 if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4259 group = JNIHandles::resolve(args->group);
4260 thread_name = args->name; // may be NULL
4261 }
4262 if (group == NULL) group = Universe::main_thread_group();
4263
4264 // Create Java level thread object and attach it to this thread
4265 bool attach_failed = false;
4266 {
4267 EXCEPTION_MARK;
4268 HandleMark hm(THREAD);
4269 Handle thread_group(THREAD, group);
4270 thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4271 if (HAS_PENDING_EXCEPTION) {
4272 CLEAR_PENDING_EXCEPTION;
4273 // cleanup outside the handle mark.
4274 attach_failed = true;
4275 }
4276 }
4277
4278 if (attach_failed) {
4279 // Added missing cleanup
4280 thread->cleanup_failed_attach_current_thread();
4281 return JNI_ERR;
4282 }
4283
4284 // mark the thread as no longer attaching
4285 // this uses a fence to push the change through so we don't have
4286 // to regrab the threads_lock
4287 thread->set_done_attaching_via_jni();
4288
4289 // Set java thread status.
4290 java_lang_Thread::set_thread_status(thread->threadObj(),
4291 java_lang_Thread::RUNNABLE);
4292
4293 // Notify the debugger
4294 if (JvmtiExport::should_post_thread_life()) {
4295 JvmtiExport::post_thread_start(thread);
4296 }
4297
4298 EventThreadStart event;
4299 if (event.should_commit()) {
4300 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4301 event.commit();
4302 }
4303
4304 *(JNIEnv**)penv = thread->jni_environment();
4305
4306 // Now leaving the VM, so change thread_state. This is normally automatically taken care
4307 // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4308 // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4309 // needed.
4310
4311 ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4312
4313 // Perform any platform dependent FPU setup
4314 os::setup_fpu();
4315
4316 return JNI_OK;
4317 }
4318
4319
4320 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4321 HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4322 if (!vm_created) {
4323 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4324 return JNI_ERR;
4325 }
4326
4327 JNIWrapper("AttachCurrentThread");
4328 jint ret = attach_current_thread(vm, penv, _args, false);
4329 HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4330 return ret;
4331 }
4332
4333
4334 jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
4335 HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4336 VM_Exit::block_if_vm_exited();
4337
4338 JNIWrapper("DetachCurrentThread");
4339
4340 // If the thread has been deattacted the operations is a no-op
4341 if (ThreadLocalStorage::thread() == NULL) {
4342 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4343 return JNI_OK;
4344 }
4345
4346 JavaThread* thread = JavaThread::current();
4347 if (thread->has_last_Java_frame()) {
4348 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4349 // Can't detach a thread that's running java, that can't work.
4350 return JNI_ERR;
4351 }
4352
4353 // Safepoint support. Have to do call-back to safepoint code, if in the
4354 // middel of a safepoint operation
4355 ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4356
4357 // XXX: Note that JavaThread::exit() call below removes the guards on the
4358 // stack pages set up via enable_stack_{red,yellow}_zone() calls
4359 // above in jni_AttachCurrentThread. Unfortunately, while the setting
4360 // of the guards is visible in jni_AttachCurrentThread above,
4361 // the removal of the guards is buried below in JavaThread::exit()
4362 // here. The abstraction should be more symmetrically either exposed
4363 // or hidden (e.g. it could probably be hidden in the same
4364 // (platform-dependent) methods where we do alternate stack
4365 // maintenance work?)
4366 thread->exit(false, JavaThread::jni_detach);
4367 delete thread;
4368
4369 HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4370 return JNI_OK;
4371 }
4372
4373 DT_RETURN_MARK_DECL(GetEnv, jint
4374 , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4375
4376 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4377 HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4378 jint ret = JNI_ERR;
4379 DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4380
4381 if (!vm_created) {
4382 *penv = NULL;
4383 ret = JNI_EDETACHED;
4384 return ret;
4385 }
4386
4387 if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4388 return ret;
4389 }
4390
4391 #ifndef JVMPI_VERSION_1
4392 // need these in order to be polite about older agents
4393 #define JVMPI_VERSION_1 ((jint)0x10000001)
4394 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4395 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4396 #endif // !JVMPI_VERSION_1
4397
4398 Thread* thread = ThreadLocalStorage::thread();
4399 if (thread != NULL && thread->is_Java_thread()) {
4400 if (Threads::is_supported_jni_version_including_1_1(version)) {
4401 *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4402 ret = JNI_OK;
4403 return ret;
4404
4405 } else if (version == JVMPI_VERSION_1 ||
4406 version == JVMPI_VERSION_1_1 ||
4407 version == JVMPI_VERSION_1_2) {
4408 tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4409 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4410 ret = JNI_EVERSION;
4411 return ret;
4412 } else if (JvmtiExport::is_jvmdi_version(version)) {
4413 tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4414 tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4415 ret = JNI_EVERSION;
4416 return ret;
4417 } else {
4418 *penv = NULL;
4419 ret = JNI_EVERSION;
4420 return ret;
4421 }
4422 } else {
4423 *penv = NULL;
4424 ret = JNI_EDETACHED;
4425 return ret;
4426 }
4427 }
4428
4429
4430 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4431 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4432 if (!vm_created) {
4433 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4434 return JNI_ERR;
4435 }
4436
4437 JNIWrapper("AttachCurrentThreadAsDaemon");
4438 jint ret = attach_current_thread(vm, penv, _args, true);
4439 HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4440 return ret;
4441 }
4442
4443
4444 } // End extern "C"
4445
4446 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4447 NULL,
4448 NULL,
4449 NULL,
4450
4451 jni_DestroyJavaVM,
4452 jni_AttachCurrentThread,
4453 jni_DetachCurrentThread,
4454 jni_GetEnv,
4455 jni_AttachCurrentThreadAsDaemon
4456 };