Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 301:387a62b4be60
6728478: Assertion at parallel promotion from young to old generation
Summary: The fix avoids a call to address_for_index() in this particular situation where it is not known if the passed index is in bounds.
Reviewed-by: tonyp
author | jmasa |
---|---|
date | Wed, 20 Aug 2008 23:05:04 -0700 |
parents | 9c2ecc2ffb12 |
children | 1ee8caae33af |
rev | line source |
---|---|
0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_jvm.cpp.incl" | |
27 #include <errno.h> | |
28 | |
29 /* | |
30 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
31 such ctors and calls MUST NOT come between an oop declaration/init and its | |
32 usage because if objects are move this may cause various memory stomps, bus | |
33 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
34 failures": | |
35 | |
36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
37 JVMWrapper("JVM_GetClassDeclaredFields"); | |
38 | |
39 // Object address to be held directly in mirror & not visible to GC | |
40 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
41 | |
42 // If this ctor can hit a safepoint, moving objects around, then | |
43 ComplexConstructor foo; | |
44 | |
45 // Boom! mirror may point to JUNK instead of the intended object | |
46 (some dereference of mirror) | |
47 | |
48 // Here's another call that may block for GC, making mirror stale | |
49 MutexLocker ml(some_lock); | |
50 | |
51 // And here's an initializer that can result in a stale oop | |
52 // all in one step. | |
53 oop o = call_that_can_throw_exception(TRAPS); | |
54 | |
55 | |
56 The solution is to keep the oop declaration BELOW the ctor or function | |
57 call that might cause a GC, do another resolve to reassign the oop, or | |
58 consider use of a Handle instead of an oop so there is immunity from object | |
59 motion. But note that the "QUICK" entries below do not have a handlemark | |
60 and thus can only support use of handles passed in. | |
61 */ | |
62 | |
63 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { | |
64 ResourceMark rm; | |
65 int line_number = -1; | |
66 const char * source_file = NULL; | |
67 klassOop caller = NULL; | |
68 JavaThread* jthread = JavaThread::current(); | |
69 if (jthread->has_last_Java_frame()) { | |
70 vframeStream vfst(jthread); | |
71 | |
72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); | |
74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); | |
75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); | |
76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); | |
77 | |
78 methodOop last_caller = NULL; | |
79 | |
80 while (!vfst.at_end()) { | |
81 methodOop m = vfst.method(); | |
82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&& | |
83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && | |
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
85 break; | |
86 } | |
87 last_caller = m; | |
88 vfst.next(); | |
89 } | |
90 // if this is called from Class.forName0 and that is called from Class.forName, | |
91 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
92 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
93 bool found_it = false; | |
94 if (!vfst.at_end() && | |
95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
96 vfst.method()->name() == vmSymbols::forName0_name()) { | |
97 vfst.next(); | |
98 if (!vfst.at_end() && | |
99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
100 vfst.method()->name() == vmSymbols::forName_name()) { | |
101 vfst.next(); | |
102 found_it = true; | |
103 } | |
104 } else if (last_caller != NULL && | |
105 instanceKlass::cast(last_caller->method_holder())->name() == | |
106 vmSymbols::java_lang_ClassLoader() && | |
107 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
108 last_caller->name() == vmSymbols::loadClass_name())) { | |
109 found_it = true; | |
110 } | |
111 if (found_it && !vfst.at_end()) { | |
112 // found the caller | |
113 caller = vfst.method()->method_holder(); | |
114 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
116 if (s != NULL) { | |
117 source_file = s->as_C_string(); | |
118 } | |
119 } | |
120 } | |
121 if (caller != NULL) { | |
122 if (to_class != caller) { | |
123 const char * from = Klass::cast(caller)->external_name(); | |
124 const char * to = Klass::cast(to_class)->external_name(); | |
125 // print in a single call to reduce interleaving between threads | |
126 if (source_file != NULL) { | |
127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number); | |
128 } else { | |
129 tty->print("RESOLVE %s %s (explicit)\n", from, to); | |
130 } | |
131 } | |
132 } | |
133 } | |
134 | |
135 static void trace_class_resolution(klassOop to_class) { | |
136 EXCEPTION_MARK; | |
137 trace_class_resolution_impl(to_class, THREAD); | |
138 if (HAS_PENDING_EXCEPTION) { | |
139 CLEAR_PENDING_EXCEPTION; | |
140 } | |
141 } | |
142 | |
143 // Wrapper to trace JVM functions | |
144 | |
145 #ifdef ASSERT | |
146 class JVMTraceWrapper : public StackObj { | |
147 public: | |
148 JVMTraceWrapper(const char* format, ...) { | |
149 if (TraceJVMCalls) { | |
150 va_list ap; | |
151 va_start(ap, format); | |
152 tty->print("JVM "); | |
153 tty->vprint_cr(format, ap); | |
154 va_end(ap); | |
155 } | |
156 } | |
157 }; | |
158 | |
159 Histogram* JVMHistogram; | |
160 volatile jint JVMHistogram_lock = 0; | |
161 | |
162 class JVMHistogramElement : public HistogramElement { | |
163 public: | |
164 JVMHistogramElement(const char* name); | |
165 }; | |
166 | |
167 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
168 _name = elementName; | |
169 uintx count = 0; | |
170 | |
171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
173 count +=1; | |
174 if ( (WarnOnStalledSpinLock > 0) | |
175 && (count % WarnOnStalledSpinLock == 0)) { | |
176 warning("JVMHistogram_lock seems to be stalled"); | |
177 } | |
178 } | |
179 } | |
180 | |
181 if(JVMHistogram == NULL) | |
182 JVMHistogram = new Histogram("JVM Call Counts",100); | |
183 | |
184 JVMHistogram->add_element(this); | |
185 Atomic::dec(&JVMHistogram_lock); | |
186 } | |
187 | |
188 #define JVMCountWrapper(arg) \ | |
189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
191 | |
192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
196 #else | |
197 #define JVMWrapper(arg1) | |
198 #define JVMWrapper2(arg1, arg2) | |
199 #define JVMWrapper3(arg1, arg2, arg3) | |
200 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
201 #endif | |
202 | |
203 | |
204 // Interface version ///////////////////////////////////////////////////////////////////// | |
205 | |
206 | |
207 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
208 return JVM_INTERFACE_VERSION; | |
209 JVM_END | |
210 | |
211 | |
212 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
213 | |
214 | |
215 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
216 JVMWrapper("JVM_CurrentTimeMillis"); | |
217 return os::javaTimeMillis(); | |
218 JVM_END | |
219 | |
220 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
221 JVMWrapper("JVM_NanoTime"); | |
222 return os::javaTimeNanos(); | |
223 JVM_END | |
224 | |
225 | |
226 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
227 jobject dst, jint dst_pos, jint length)) | |
228 JVMWrapper("JVM_ArrayCopy"); | |
229 // Check if we have null pointers | |
230 if (src == NULL || dst == NULL) { | |
231 THROW(vmSymbols::java_lang_NullPointerException()); | |
232 } | |
233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
237 // Do copy | |
238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
239 JVM_END | |
240 | |
241 | |
242 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
243 JavaValue r(T_OBJECT); | |
244 // public synchronized Object put(Object key, Object value); | |
245 HandleMark hm(THREAD); | |
246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
248 JavaCalls::call_virtual(&r, | |
249 props, | |
250 KlassHandle(THREAD, SystemDictionary::properties_klass()), | |
251 vmSymbolHandles::put_name(), | |
252 vmSymbolHandles::object_object_object_signature(), | |
253 key_str, | |
254 value_str, | |
255 THREAD); | |
256 } | |
257 | |
258 | |
259 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
260 | |
261 | |
262 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
263 JVMWrapper("JVM_InitProperties"); | |
264 ResourceMark rm; | |
265 | |
266 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
267 | |
268 // System property list includes both user set via -D option and | |
269 // jvm system specific properties. | |
270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
271 PUTPROP(props, p->key(), p->value()); | |
272 } | |
273 | |
274 // Convert the -XX:MaxDirectMemorySize= command line flag | |
275 // to the sun.nio.MaxDirectMemorySize property. | |
276 // Do this after setting user properties to prevent people | |
277 // from setting the value with a -D option, as requested. | |
278 { | |
279 char as_chars[256]; | |
280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); | |
281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); | |
282 } | |
283 | |
284 // JVM monitoring and management support | |
285 // Add the sun.management.compiler property for the compiler's name | |
286 { | |
287 #undef CSIZE | |
288 #if defined(_LP64) || defined(_WIN64) | |
289 #define CSIZE "64-Bit " | |
290 #else | |
291 #define CSIZE | |
292 #endif // 64bit | |
293 | |
294 #ifdef TIERED | |
295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
296 #else | |
297 #if defined(COMPILER1) | |
298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
299 #elif defined(COMPILER2) | |
300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
301 #else | |
302 const char* compiler_name = ""; | |
303 #endif // compilers | |
304 #endif // TIERED | |
305 | |
306 if (*compiler_name != '\0' && | |
307 (Arguments::mode() != Arguments::_int)) { | |
308 PUTPROP(props, "sun.management.compiler", compiler_name); | |
309 } | |
310 } | |
311 | |
312 return properties; | |
313 JVM_END | |
314 | |
315 | |
316 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
317 | |
318 extern volatile jint vm_created; | |
319 | |
320 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
321 if (vm_created != 0 && (code == 0)) { | |
322 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
323 Universe::run_finalizers_on_exit(); | |
324 } | |
325 before_exit(thread); | |
326 vm_exit(code); | |
327 JVM_END | |
328 | |
329 | |
330 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
331 before_exit(thread); | |
332 vm_exit(code); | |
333 JVM_END | |
334 | |
335 | |
336 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
337 register_on_exit_function(func); | |
338 JVM_END | |
339 | |
340 | |
341 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
342 JVMWrapper("JVM_GC"); | |
343 if (!DisableExplicitGC) { | |
344 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
345 } | |
346 JVM_END | |
347 | |
348 | |
349 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
350 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
351 return Universe::heap()->millis_since_last_gc(); | |
352 JVM_END | |
353 | |
354 | |
355 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
357 JVM_END | |
358 | |
359 | |
360 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
362 JVM_END | |
363 | |
364 static inline jlong convert_size_t_to_jlong(size_t val) { | |
365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
366 NOT_LP64 (return (jlong)val;) | |
367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
368 } | |
369 | |
370 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
371 JVMWrapper("JVM_TotalMemory"); | |
372 size_t n = Universe::heap()->capacity(); | |
373 return convert_size_t_to_jlong(n); | |
374 JVM_END | |
375 | |
376 | |
377 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
378 JVMWrapper("JVM_FreeMemory"); | |
379 CollectedHeap* ch = Universe::heap(); | |
380 size_t n = ch->capacity() - ch->used(); | |
381 return convert_size_t_to_jlong(n); | |
382 JVM_END | |
383 | |
384 | |
385 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
386 JVMWrapper("JVM_MaxMemory"); | |
387 size_t n = Universe::heap()->max_capacity(); | |
388 return convert_size_t_to_jlong(n); | |
389 JVM_END | |
390 | |
391 | |
392 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
393 JVMWrapper("JVM_ActiveProcessorCount"); | |
394 return os::active_processor_count(); | |
395 JVM_END | |
396 | |
397 | |
398 | |
399 // java.lang.Throwable ////////////////////////////////////////////////////// | |
400 | |
401 | |
402 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
403 JVMWrapper("JVM_FillInStackTrace"); | |
404 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
405 java_lang_Throwable::fill_in_stack_trace(exception); | |
406 JVM_END | |
407 | |
408 | |
409 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
410 JVMWrapper("JVM_PrintStackTrace"); | |
411 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
412 oop exception = JNIHandles::resolve_non_null(receiver); | |
413 oop stream = JNIHandles::resolve_non_null(printable); | |
414 java_lang_Throwable::print_stack_trace(exception, stream); | |
415 JVM_END | |
416 | |
417 | |
418 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
419 JVMWrapper("JVM_GetStackTraceDepth"); | |
420 oop exception = JNIHandles::resolve(throwable); | |
421 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
422 JVM_END | |
423 | |
424 | |
425 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
426 JVMWrapper("JVM_GetStackTraceElement"); | |
427 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
428 oop exception = JNIHandles::resolve(throwable); | |
429 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
430 return JNIHandles::make_local(env, element); | |
431 JVM_END | |
432 | |
433 | |
434 // java.lang.Object /////////////////////////////////////////////// | |
435 | |
436 | |
437 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
438 JVMWrapper("JVM_IHashCode"); | |
439 // as implemented in the classic virtual machine; return 0 if object is NULL | |
440 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
441 JVM_END | |
442 | |
443 | |
444 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
445 JVMWrapper("JVM_MonitorWait"); | |
446 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
447 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
448 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
449 if (JvmtiExport::should_post_monitor_wait()) { | |
450 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
451 } | |
452 ObjectSynchronizer::wait(obj, ms, CHECK); | |
453 JVM_END | |
454 | |
455 | |
456 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
457 JVMWrapper("JVM_MonitorNotify"); | |
458 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
459 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
460 ObjectSynchronizer::notify(obj, CHECK); | |
461 JVM_END | |
462 | |
463 | |
464 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
465 JVMWrapper("JVM_MonitorNotifyAll"); | |
466 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
467 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
468 ObjectSynchronizer::notifyall(obj, CHECK); | |
469 JVM_END | |
470 | |
471 | |
472 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
473 JVMWrapper("JVM_Clone"); | |
474 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
475 const KlassHandle klass (THREAD, obj->klass()); | |
476 JvmtiVMObjectAllocEventCollector oam; | |
477 | |
478 #ifdef ASSERT | |
479 // Just checking that the cloneable flag is set correct | |
480 if (obj->is_javaArray()) { | |
481 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
482 } else { | |
483 guarantee(obj->is_instance(), "should be instanceOop"); | |
484 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass()); | |
485 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); | |
486 } | |
487 #endif | |
488 | |
489 // Check if class of obj supports the Cloneable interface. | |
490 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
491 if (!klass->is_cloneable()) { | |
492 ResourceMark rm(THREAD); | |
493 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
494 } | |
495 | |
496 // Make shallow object copy | |
497 const int size = obj->size(); | |
498 oop new_obj = NULL; | |
499 if (obj->is_javaArray()) { | |
500 const int length = ((arrayOop)obj())->length(); | |
501 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
502 } else { | |
503 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
504 } | |
505 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
506 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
507 // be suspended in the middle of copying the pointer and end up with parts | |
508 // of two different pointers in the field. Subsequent dereferences will crash. | |
509 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
510 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
511 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
512 // The same is true of StubRoutines::object_copy and the various oop_copy | |
513 // variants, and of the code generated by the inline_native_clone intrinsic. | |
514 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
515 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
516 (size_t)align_object_size(size) / HeapWordsPerLong); | |
517 // Clear the header | |
518 new_obj->init_mark(); | |
519 | |
520 // Store check (mark entire object and let gc sort it out) | |
521 BarrierSet* bs = Universe::heap()->barrier_set(); | |
522 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
523 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
524 | |
525 // Caution: this involves a java upcall, so the clone should be | |
526 // "gc-robust" by this stage. | |
527 if (klass->has_finalizer()) { | |
528 assert(obj->is_instance(), "should be instanceOop"); | |
529 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
530 } | |
531 | |
532 return JNIHandles::make_local(env, oop(new_obj)); | |
533 JVM_END | |
534 | |
535 // java.lang.Compiler //////////////////////////////////////////////////// | |
536 | |
537 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
538 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
539 // functions are all silently ignored unless JVM warnings are printed. | |
540 | |
541 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
542 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
543 JVM_END | |
544 | |
545 | |
546 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
547 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
548 return JNI_FALSE; | |
549 JVM_END | |
550 | |
551 | |
552 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
553 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
554 return JNI_FALSE; | |
555 JVM_END | |
556 | |
557 | |
558 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
559 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
560 return JNI_FALSE; | |
561 JVM_END | |
562 | |
563 | |
564 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
565 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
566 return NULL; | |
567 JVM_END | |
568 | |
569 | |
570 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
571 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
572 JVM_END | |
573 | |
574 | |
575 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
576 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
577 JVM_END | |
578 | |
579 | |
580 | |
581 // Error message support ////////////////////////////////////////////////////// | |
582 | |
583 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
584 JVMWrapper("JVM_GetLastErrorString"); | |
585 return hpi::lasterror(buf, len); | |
586 JVM_END | |
587 | |
588 | |
589 // java.io.File /////////////////////////////////////////////////////////////// | |
590 | |
591 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
592 JVMWrapper2("JVM_NativePath (%s)", path); | |
593 return hpi::native_path(path); | |
594 JVM_END | |
595 | |
596 | |
597 // Misc. class handling /////////////////////////////////////////////////////////// | |
598 | |
599 | |
600 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
601 JVMWrapper("JVM_GetCallerClass"); | |
602 klassOop k = thread->security_get_caller_class(depth); | |
603 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
604 JVM_END | |
605 | |
606 | |
607 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
608 JVMWrapper("JVM_FindPrimitiveClass"); | |
609 oop mirror = NULL; | |
610 BasicType t = name2type(utf); | |
611 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
612 mirror = Universe::java_mirror(t); | |
613 } | |
614 if (mirror == NULL) { | |
615 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
616 } else { | |
617 return (jclass) JNIHandles::make_local(env, mirror); | |
618 } | |
619 JVM_END | |
620 | |
621 | |
622 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
623 JVMWrapper("JVM_ResolveClass"); | |
624 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
625 JVM_END | |
626 | |
226
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627 // Rationale behind JVM_FindClassFromBootLoader |
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628 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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629 // b> because of (a) java.dll has a direct dependecy on the unexported |
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630 // private symbol "_JVM_FindClassFromClassLoader@20". |
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631 // c> the launcher cannot use the private symbol as it dynamically opens |
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632 // the entry point, so if something changes, the launcher will fail |
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633 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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634 // stable exported interface. |
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635 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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636 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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637 // JVM_FindClassFromClassLoader and will not be backward compatible |
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638 // with older JDKs. |
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639 // Thus a public/stable exported entry point is the right solution, |
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640 // public here means public in linker semantics, and is exported only |
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641 // to the JDK, and is not intended to be a public API. |
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642 |
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643 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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644 const char* name, |
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645 jboolean throwError)) |
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646 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name, |
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647 throwError ? "error" : "exception"); |
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648 return JVM_FindClassFromClassLoader(env, name, JNI_FALSE, |
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649 (jobject)NULL, throwError); |
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650 JVM_END |
0 | 651 |
652 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, | |
653 jboolean init, jobject loader, | |
654 jboolean throwError)) | |
655 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, | |
656 throwError ? "error" : "exception"); | |
657 // Java libraries should ensure that name is never null... | |
658 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
659 // It's impossible to create this class; the name cannot fit | |
660 // into the constant pool. | |
661 if (throwError) { | |
662 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
663 } else { | |
664 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
665 } | |
666 } | |
667 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
668 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
669 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
670 Handle(), throwError, thread); | |
671 | |
672 if (TraceClassResolution && result != NULL) { | |
673 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
674 } | |
675 | |
676 return result; | |
677 JVM_END | |
678 | |
679 | |
680 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
681 jboolean init, jclass from)) | |
682 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
683 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
684 // It's impossible to create this class; the name cannot fit | |
685 // into the constant pool. | |
686 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
687 } | |
688 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
689 oop from_class_oop = JNIHandles::resolve(from); | |
690 klassOop from_class = (from_class_oop == NULL) | |
691 ? (klassOop)NULL | |
692 : java_lang_Class::as_klassOop(from_class_oop); | |
693 oop class_loader = NULL; | |
694 oop protection_domain = NULL; | |
695 if (from_class != NULL) { | |
696 class_loader = Klass::cast(from_class)->class_loader(); | |
697 protection_domain = Klass::cast(from_class)->protection_domain(); | |
698 } | |
699 Handle h_loader(THREAD, class_loader); | |
700 Handle h_prot (THREAD, protection_domain); | |
701 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
702 h_prot, true, thread); | |
703 | |
704 if (TraceClassResolution && result != NULL) { | |
705 // this function is generally only used for class loading during verification. | |
706 ResourceMark rm; | |
707 oop from_mirror = JNIHandles::resolve_non_null(from); | |
708 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
709 const char * from_name = Klass::cast(from_class)->external_name(); | |
710 | |
711 oop mirror = JNIHandles::resolve_non_null(result); | |
712 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
713 const char * to = Klass::cast(to_class)->external_name(); | |
714 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
715 } | |
716 | |
717 return result; | |
718 JVM_END | |
719 | |
720 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
721 if (loader.is_null()) { | |
722 return; | |
723 } | |
724 | |
725 // check whether the current caller thread holds the lock or not. | |
726 // If not, increment the corresponding counter | |
727 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
728 ObjectSynchronizer::owner_self) { | |
729 counter->inc(); | |
730 } | |
731 } | |
732 | |
733 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
734 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) { | |
735 | |
736 // Since exceptions can be thrown, class initialization can take place | |
737 // if name is NULL no check for class name in .class stream has to be made. | |
738 symbolHandle class_name; | |
739 if (name != NULL) { | |
740 const int str_len = (int)strlen(name); | |
741 if (str_len > symbolOopDesc::max_length()) { | |
742 // It's impossible to create this class; the name cannot fit | |
743 // into the constant pool. | |
744 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
745 } | |
746 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); | |
747 } | |
748 | |
749 ResourceMark rm(THREAD); | |
750 ClassFileStream st((u1*) buf, len, (char *)source); | |
751 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
752 if (UsePerfData) { | |
753 is_lock_held_by_thread(class_loader, | |
754 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
755 THREAD); | |
756 } | |
757 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
758 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
759 protection_domain, &st, | |
760 CHECK_NULL); | |
761 | |
762 if (TraceClassResolution && k != NULL) { | |
763 trace_class_resolution(k); | |
764 } | |
765 | |
766 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
767 } | |
768 | |
769 | |
770 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
771 JVMWrapper2("JVM_DefineClass %s", name); | |
772 | |
773 return jvm_define_class_common(env, name, loader, buf, len, pd, "__JVM_DefineClass__", THREAD); | |
774 JVM_END | |
775 | |
776 | |
777 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
778 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
779 | |
780 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD); | |
781 JVM_END | |
782 | |
783 | |
784 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
785 JVMWrapper("JVM_FindLoadedClass"); | |
786 ResourceMark rm(THREAD); | |
787 | |
788 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
789 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
790 | |
791 const char* str = java_lang_String::as_utf8_string(string()); | |
792 // Sanity check, don't expect null | |
793 if (str == NULL) return NULL; | |
794 | |
795 const int str_len = (int)strlen(str); | |
796 if (str_len > symbolOopDesc::max_length()) { | |
797 // It's impossible to create this class; the name cannot fit | |
798 // into the constant pool. | |
799 return NULL; | |
800 } | |
801 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); | |
802 | |
803 // Security Note: | |
804 // The Java level wrapper will perform the necessary security check allowing | |
805 // us to pass the NULL as the initiating class loader. | |
806 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
807 if (UsePerfData) { | |
808 is_lock_held_by_thread(h_loader, | |
809 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
810 THREAD); | |
811 } | |
812 | |
813 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
814 h_loader, | |
815 Handle(), | |
816 CHECK_NULL); | |
817 | |
818 return (k == NULL) ? NULL : | |
819 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
820 JVM_END | |
821 | |
822 | |
823 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
824 | |
825 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
826 assert (cls != NULL, "illegal class"); | |
827 JVMWrapper("JVM_GetClassName"); | |
828 JvmtiVMObjectAllocEventCollector oam; | |
829 ResourceMark rm(THREAD); | |
830 const char* name; | |
831 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
832 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
833 } else { | |
834 // Consider caching interned string in Klass | |
835 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
836 assert(k->is_klass(), "just checking"); | |
837 name = Klass::cast(k)->external_name(); | |
838 } | |
839 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
840 return (jstring) JNIHandles::make_local(env, result); | |
841 JVM_END | |
842 | |
843 | |
844 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
845 JVMWrapper("JVM_GetClassInterfaces"); | |
846 JvmtiVMObjectAllocEventCollector oam; | |
847 oop mirror = JNIHandles::resolve_non_null(cls); | |
848 | |
849 // Special handling for primitive objects | |
850 if (java_lang_Class::is_primitive(mirror)) { | |
851 // Primitive objects does not have any interfaces | |
852 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
853 return (jobjectArray) JNIHandles::make_local(env, r); | |
854 } | |
855 | |
856 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
857 // Figure size of result array | |
858 int size; | |
859 if (klass->oop_is_instance()) { | |
860 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
861 } else { | |
862 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
863 size = 2; | |
864 } | |
865 | |
866 // Allocate result array | |
867 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL); | |
868 objArrayHandle result (THREAD, r); | |
869 // Fill in result | |
870 if (klass->oop_is_instance()) { | |
871 // Regular instance klass, fill in all local interfaces | |
872 for (int index = 0; index < size; index++) { | |
873 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
874 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
875 } | |
876 } else { | |
877 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
878 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror()); | |
879 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror()); | |
880 } | |
881 return (jobjectArray) JNIHandles::make_local(env, result()); | |
882 JVM_END | |
883 | |
884 | |
885 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
886 JVMWrapper("JVM_GetClassLoader"); | |
887 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
888 return NULL; | |
889 } | |
890 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
891 oop loader = Klass::cast(k)->class_loader(); | |
892 return JNIHandles::make_local(env, loader); | |
893 JVM_END | |
894 | |
895 | |
896 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
897 JVMWrapper("JVM_IsInterface"); | |
898 oop mirror = JNIHandles::resolve_non_null(cls); | |
899 if (java_lang_Class::is_primitive(mirror)) { | |
900 return JNI_FALSE; | |
901 } | |
902 klassOop k = java_lang_Class::as_klassOop(mirror); | |
903 jboolean result = Klass::cast(k)->is_interface(); | |
904 assert(!result || Klass::cast(k)->oop_is_instance(), | |
905 "all interfaces are instance types"); | |
906 // The compiler intrinsic for isInterface tests the | |
907 // Klass::_access_flags bits in the same way. | |
908 return result; | |
909 JVM_END | |
910 | |
911 | |
912 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
913 JVMWrapper("JVM_GetClassSigners"); | |
914 JvmtiVMObjectAllocEventCollector oam; | |
915 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
916 // There are no signers for primitive types | |
917 return NULL; | |
918 } | |
919 | |
920 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
921 objArrayOop signers = NULL; | |
922 if (Klass::cast(k)->oop_is_instance()) { | |
923 signers = instanceKlass::cast(k)->signers(); | |
924 } | |
925 | |
926 // If there are no signers set in the class, or if the class | |
927 // is an array, return NULL. | |
928 if (signers == NULL) return NULL; | |
929 | |
930 // copy of the signers array | |
931 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
932 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
933 for (int index = 0; index < signers->length(); index++) { | |
934 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
935 } | |
936 | |
937 // return the copy | |
938 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
939 JVM_END | |
940 | |
941 | |
942 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
943 JVMWrapper("JVM_SetClassSigners"); | |
944 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
945 // This call is ignored for primitive types and arrays. | |
946 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
947 // be called with an array. Only the bootstrap loader creates arrays. | |
948 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
949 if (Klass::cast(k)->oop_is_instance()) { | |
950 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
951 } | |
952 } | |
953 JVM_END | |
954 | |
955 | |
956 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
957 JVMWrapper("JVM_GetProtectionDomain"); | |
958 if (JNIHandles::resolve(cls) == NULL) { | |
959 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
960 } | |
961 | |
962 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
963 // Primitive types does not have a protection domain. | |
964 return NULL; | |
965 } | |
966 | |
967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
968 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
969 JVM_END | |
970 | |
971 | |
972 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
973 // still defined in core libraries as of 1.5. | |
974 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
975 JVMWrapper("JVM_SetProtectionDomain"); | |
976 if (JNIHandles::resolve(cls) == NULL) { | |
977 THROW(vmSymbols::java_lang_NullPointerException()); | |
978 } | |
979 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
980 // Call is ignored for primitive types | |
981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
982 | |
983 // cls won't be an array, as this called only from ClassLoader.defineClass | |
984 if (Klass::cast(k)->oop_is_instance()) { | |
985 oop pd = JNIHandles::resolve(protection_domain); | |
986 assert(pd == NULL || pd->is_oop(), "just checking"); | |
987 instanceKlass::cast(k)->set_protection_domain(pd); | |
988 } | |
989 } | |
990 JVM_END | |
991 | |
992 | |
993 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
994 JVMWrapper("JVM_DoPrivileged"); | |
995 | |
996 if (action == NULL) { | |
997 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
998 } | |
999 | |
1000 // Stack allocated list of privileged stack elements | |
1001 PrivilegedElement pi; | |
1002 | |
1003 // Check that action object understands "Object run()" | |
1004 Handle object (THREAD, JNIHandles::resolve(action)); | |
1005 | |
1006 // get run() method | |
1007 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1008 vmSymbols::run_method_name(), | |
1009 vmSymbols::void_object_signature()); | |
1010 methodHandle m (THREAD, m_oop); | |
1011 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1012 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1013 } | |
1014 | |
1015 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1016 vframeStream vfst(thread); | |
1017 vfst.security_get_caller_frame(1); | |
1018 | |
1019 if (!vfst.at_end()) { | |
1020 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1021 thread->set_privileged_stack_top(&pi); | |
1022 } | |
1023 | |
1024 | |
1025 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1026 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1027 Handle pending_exception; | |
1028 JavaValue result(T_OBJECT); | |
1029 JavaCallArguments args(object); | |
1030 JavaCalls::call(&result, m, &args, THREAD); | |
1031 | |
1032 // done with action, remove ourselves from the list | |
1033 if (!vfst.at_end()) { | |
1034 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1035 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1036 } | |
1037 | |
1038 if (HAS_PENDING_EXCEPTION) { | |
1039 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1040 CLEAR_PENDING_EXCEPTION; | |
1041 | |
1042 if ( pending_exception->is_a(SystemDictionary::exception_klass()) && | |
1043 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) { | |
1044 // Throw a java.security.PrivilegedActionException(Exception e) exception | |
1045 JavaCallArguments args(pending_exception); | |
1046 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), | |
1047 vmSymbolHandles::exception_void_signature(), | |
1048 &args); | |
1049 } | |
1050 } | |
1051 | |
1052 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1053 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1054 JVM_END | |
1055 | |
1056 | |
1057 // Returns the inherited_access_control_context field of the running thread. | |
1058 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1059 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1060 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1061 return JNIHandles::make_local(env, result); | |
1062 JVM_END | |
1063 | |
1064 class RegisterArrayForGC { | |
1065 private: | |
1066 JavaThread *_thread; | |
1067 public: | |
1068 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1069 _thread = thread; | |
1070 _thread->register_array_for_gc(array); | |
1071 } | |
1072 | |
1073 ~RegisterArrayForGC() { | |
1074 _thread->register_array_for_gc(NULL); | |
1075 } | |
1076 }; | |
1077 | |
1078 | |
1079 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1080 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1081 if (!UsePrivilegedStack) return NULL; | |
1082 | |
1083 ResourceMark rm(THREAD); | |
1084 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1085 JvmtiVMObjectAllocEventCollector oam; | |
1086 | |
1087 // count the protection domains on the execution stack. We collapse | |
1088 // duplicate consecutive protection domains into a single one, as | |
1089 // well as stopping when we hit a privileged frame. | |
1090 | |
1091 // Use vframeStream to iterate through Java frames | |
1092 vframeStream vfst(thread); | |
1093 | |
1094 oop previous_protection_domain = NULL; | |
1095 Handle privileged_context(thread, NULL); | |
1096 bool is_privileged = false; | |
1097 oop protection_domain = NULL; | |
1098 | |
1099 for(; !vfst.at_end(); vfst.next()) { | |
1100 // get method of frame | |
1101 methodOop method = vfst.method(); | |
1102 intptr_t* frame_id = vfst.frame_id(); | |
1103 | |
1104 // check the privileged frames to see if we have a match | |
1105 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1106 // this frame is privileged | |
1107 is_privileged = true; | |
1108 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1109 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1110 } else { | |
1111 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1112 } | |
1113 | |
1114 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1115 local_array->push(protection_domain); | |
1116 previous_protection_domain = protection_domain; | |
1117 } | |
1118 | |
1119 if (is_privileged) break; | |
1120 } | |
1121 | |
1122 | |
1123 // either all the domains on the stack were system domains, or | |
1124 // we had a privileged system domain | |
1125 if (local_array->is_empty()) { | |
1126 if (is_privileged && privileged_context.is_null()) return NULL; | |
1127 | |
1128 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1129 return JNIHandles::make_local(env, result); | |
1130 } | |
1131 | |
1132 // the resource area must be registered in case of a gc | |
1133 RegisterArrayForGC ragc(thread, local_array); | |
1134 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(), | |
1135 local_array->length(), CHECK_NULL); | |
1136 objArrayHandle h_context(thread, context); | |
1137 for (int index = 0; index < local_array->length(); index++) { | |
1138 h_context->obj_at_put(index, local_array->at(index)); | |
1139 } | |
1140 | |
1141 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1142 | |
1143 return JNIHandles::make_local(env, result); | |
1144 JVM_END | |
1145 | |
1146 | |
1147 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1148 JVMWrapper("JVM_IsArrayClass"); | |
1149 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1150 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1151 JVM_END | |
1152 | |
1153 | |
1154 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1155 JVMWrapper("JVM_IsPrimitiveClass"); | |
1156 oop mirror = JNIHandles::resolve_non_null(cls); | |
1157 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1158 JVM_END | |
1159 | |
1160 | |
1161 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1162 JVMWrapper("JVM_GetComponentType"); | |
1163 oop mirror = JNIHandles::resolve_non_null(cls); | |
1164 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1165 return (jclass) JNIHandles::make_local(env, result); | |
1166 JVM_END | |
1167 | |
1168 | |
1169 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1170 JVMWrapper("JVM_GetClassModifiers"); | |
1171 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1172 // Primitive type | |
1173 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1174 } | |
1175 | |
1176 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1177 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1178 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1179 return k->modifier_flags(); | |
1180 JVM_END | |
1181 | |
1182 | |
1183 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1184 | |
1185 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1186 const int inner_class_info_index = 0; | |
1187 const int outer_class_info_index = 1; | |
1188 | |
1189 JvmtiVMObjectAllocEventCollector oam; | |
1190 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1191 // of an instanceKlass | |
1192 | |
1193 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1194 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1195 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1196 return (jobjectArray)JNIHandles::make_local(env, result); | |
1197 } | |
1198 | |
1199 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1200 | |
1201 if (k->inner_classes()->length() == 0) { | |
1202 // Neither an inner nor outer class | |
1203 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1204 return (jobjectArray)JNIHandles::make_local(env, result); | |
1205 } | |
1206 | |
1207 // find inner class info | |
1208 typeArrayHandle icls(thread, k->inner_classes()); | |
1209 constantPoolHandle cp(thread, k->constants()); | |
1210 int length = icls->length(); | |
1211 | |
1212 // Allocate temp. result array | |
1213 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL); | |
1214 objArrayHandle result (THREAD, r); | |
1215 int members = 0; | |
1216 | |
1217 for(int i = 0; i < length; i += 4) { | |
1218 int ioff = icls->ushort_at(i + inner_class_info_index); | |
1219 int ooff = icls->ushort_at(i + outer_class_info_index); | |
1220 | |
1221 if (ioff != 0 && ooff != 0) { | |
1222 // Check to see if the name matches the class we're looking for | |
1223 // before attempting to find the class. | |
1224 if (cp->klass_name_at_matches(k, ooff)) { | |
1225 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1226 if (outer_klass == k()) { | |
1227 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1228 instanceKlassHandle inner_klass (THREAD, ik); | |
1229 | |
1230 // Throws an exception if outer klass has not declared k as | |
1231 // an inner klass | |
1232 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL); | |
1233 | |
1234 result->obj_at_put(members, inner_klass->java_mirror()); | |
1235 members++; | |
1236 } | |
1237 } | |
1238 } | |
1239 } | |
1240 | |
1241 if (members != length) { | |
1242 // Return array of right length | |
1243 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL); | |
1244 for(int i = 0; i < members; i++) { | |
1245 res->obj_at_put(i, result->obj_at(i)); | |
1246 } | |
1247 return (jobjectArray)JNIHandles::make_local(env, res); | |
1248 } | |
1249 | |
1250 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1251 JVM_END | |
1252 | |
1253 | |
1254 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
1255 const int inner_class_info_index = 0; | |
1256 const int outer_class_info_index = 1; | |
1257 | |
1258 // ofClass is a reference to a java_lang_Class object. | |
1259 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1260 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1261 return NULL; | |
1262 } | |
1263 | |
1264 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1265 | |
1266 if (k->inner_classes()->length() == 0) { | |
1267 // No inner class info => no declaring class | |
1268 return NULL; | |
1269 } | |
1270 | |
1271 typeArrayHandle i_icls(thread, k->inner_classes()); | |
1272 constantPoolHandle i_cp(thread, k->constants()); | |
1273 int i_length = i_icls->length(); | |
1274 | |
1275 bool found = false; | |
1276 klassOop ok; | |
1277 instanceKlassHandle outer_klass; | |
1278 | |
1279 // Find inner_klass attribute | |
1280 for(int i = 0; i < i_length && !found; i+= 4) { | |
1281 int ioff = i_icls->ushort_at(i + inner_class_info_index); | |
1282 int ooff = i_icls->ushort_at(i + outer_class_info_index); | |
1283 | |
1284 if (ioff != 0 && ooff != 0) { | |
1285 // Check to see if the name matches the class we're looking for | |
1286 // before attempting to find the class. | |
1287 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1288 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
1289 if (k() == inner_klass) { | |
1290 found = true; | |
1291 ok = i_cp->klass_at(ooff, CHECK_NULL); | |
1292 outer_klass = instanceKlassHandle(thread, ok); | |
1293 } | |
1294 } | |
1295 } | |
1296 } | |
1297 | |
1298 // If no inner class attribute found for this class. | |
1299 if (!found) return NULL; | |
1300 | |
1301 // Throws an exception if outer klass has not declared k as an inner klass | |
1302 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL); | |
1303 | |
1304 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror()); | |
1305 JVM_END | |
1306 | |
1307 | |
1308 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1309 assert (cls != NULL, "illegal class"); | |
1310 JVMWrapper("JVM_GetClassSignature"); | |
1311 JvmtiVMObjectAllocEventCollector oam; | |
1312 ResourceMark rm(THREAD); | |
1313 // Return null for arrays and primatives | |
1314 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1315 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1316 if (Klass::cast(k)->oop_is_instance()) { | |
1317 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); | |
1318 if (sym.is_null()) return NULL; | |
1319 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1320 return (jstring) JNIHandles::make_local(env, str()); | |
1321 } | |
1322 } | |
1323 return NULL; | |
1324 JVM_END | |
1325 | |
1326 | |
1327 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1328 assert (cls != NULL, "illegal class"); | |
1329 JVMWrapper("JVM_GetClassAnnotations"); | |
1330 ResourceMark rm(THREAD); | |
1331 // Return null for arrays and primitives | |
1332 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1333 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1334 if (Klass::cast(k)->oop_is_instance()) { | |
1335 return (jbyteArray) JNIHandles::make_local(env, | |
1336 instanceKlass::cast(k)->class_annotations()); | |
1337 } | |
1338 } | |
1339 return NULL; | |
1340 JVM_END | |
1341 | |
1342 | |
1343 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1344 assert(field != NULL, "illegal field"); | |
1345 JVMWrapper("JVM_GetFieldAnnotations"); | |
1346 | |
1347 // some of this code was adapted from from jni_FromReflectedField | |
1348 | |
1349 // field is a handle to a java.lang.reflect.Field object | |
1350 oop reflected = JNIHandles::resolve_non_null(field); | |
1351 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1352 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1353 int slot = java_lang_reflect_Field::slot(reflected); | |
1354 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1355 | |
1356 fieldDescriptor fd; | |
1357 KlassHandle kh(THREAD, k); | |
1358 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); | |
1359 | |
1360 if (modifiers & JVM_ACC_STATIC) { | |
1361 // for static fields we only look in the current class | |
1362 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1363 true, &fd)) { | |
1364 assert(false, "cannot find static field"); | |
1365 return NULL; // robustness | |
1366 } | |
1367 } else { | |
1368 // for instance fields we start with the current class and work | |
1369 // our way up through the superclass chain | |
1370 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1371 &fd)) { | |
1372 assert(false, "cannot find instance field"); | |
1373 return NULL; // robustness | |
1374 } | |
1375 } | |
1376 | |
1377 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1378 JVM_END | |
1379 | |
1380 | |
1381 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1382 // some of this code was adapted from from jni_FromReflectedMethod | |
1383 | |
1384 oop reflected = JNIHandles::resolve_non_null(method); | |
1385 oop mirror = NULL; | |
1386 int slot = 0; | |
1387 | |
1388 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { | |
1389 mirror = java_lang_reflect_Constructor::clazz(reflected); | |
1390 slot = java_lang_reflect_Constructor::slot(reflected); | |
1391 } else { | |
1392 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), | |
1393 "wrong type"); | |
1394 mirror = java_lang_reflect_Method::clazz(reflected); | |
1395 slot = java_lang_reflect_Method::slot(reflected); | |
1396 } | |
1397 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1398 | |
1399 KlassHandle kh(THREAD, k); | |
1400 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1401 if (m == NULL) { | |
1402 assert(false, "cannot find method"); | |
1403 return NULL; // robustness | |
1404 } | |
1405 | |
1406 return m; | |
1407 } | |
1408 | |
1409 | |
1410 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1411 JVMWrapper("JVM_GetMethodAnnotations"); | |
1412 | |
1413 // method is a handle to a java.lang.reflect.Method object | |
1414 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1415 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1416 JVM_END | |
1417 | |
1418 | |
1419 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1420 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1421 | |
1422 // method is a handle to a java.lang.reflect.Method object | |
1423 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1424 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1425 JVM_END | |
1426 | |
1427 | |
1428 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1429 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1430 | |
1431 // method is a handle to a java.lang.reflect.Method object | |
1432 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1433 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1434 JVM_END | |
1435 | |
1436 | |
1437 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1438 | |
1439 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1440 { | |
1441 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1442 JvmtiVMObjectAllocEventCollector oam; | |
1443 | |
1444 // Exclude primitive types and array types | |
1445 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1446 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1447 // Return empty array | |
1448 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL); | |
1449 return (jobjectArray) JNIHandles::make_local(env, res); | |
1450 } | |
1451 | |
1452 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1453 constantPoolHandle cp(THREAD, k->constants()); | |
1454 | |
1455 // Ensure class is linked | |
1456 k->link_class(CHECK_NULL); | |
1457 | |
1458 typeArrayHandle fields(THREAD, k->fields()); | |
1459 int fields_len = fields->length(); | |
1460 | |
1461 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1462 bool skip_backtrace = false; | |
1463 | |
1464 // Allocate result | |
1465 int num_fields; | |
1466 | |
1467 if (publicOnly) { | |
1468 num_fields = 0; | |
1469 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { | |
1470 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1471 if (mods & JVM_ACC_PUBLIC) ++num_fields; | |
1472 } | |
1473 } else { | |
1474 num_fields = fields_len / instanceKlass::next_offset; | |
1475 | |
1476 if (k() == SystemDictionary::throwable_klass()) { | |
1477 num_fields--; | |
1478 skip_backtrace = true; | |
1479 } | |
1480 } | |
1481 | |
1482 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL); | |
1483 objArrayHandle result (THREAD, r); | |
1484 | |
1485 int out_idx = 0; | |
1486 fieldDescriptor fd; | |
1487 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { | |
1488 if (skip_backtrace) { | |
1489 // 4496456 skip java.lang.Throwable.backtrace | |
1490 int offset = k->offset_from_fields(i); | |
1491 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; | |
1492 } | |
1493 | |
1494 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1495 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { | |
1496 fd.initialize(k(), i); | |
1497 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
1498 result->obj_at_put(out_idx, field); | |
1499 ++out_idx; | |
1500 } | |
1501 } | |
1502 assert(out_idx == num_fields, "just checking"); | |
1503 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1504 } | |
1505 JVM_END | |
1506 | |
1507 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1508 { | |
1509 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1510 JvmtiVMObjectAllocEventCollector oam; | |
1511 | |
1512 // Exclude primitive types and array types | |
1513 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1514 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1515 // Return empty array | |
1516 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL); | |
1517 return (jobjectArray) JNIHandles::make_local(env, res); | |
1518 } | |
1519 | |
1520 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1521 | |
1522 // Ensure class is linked | |
1523 k->link_class(CHECK_NULL); | |
1524 | |
1525 objArrayHandle methods (THREAD, k->methods()); | |
1526 int methods_length = methods->length(); | |
1527 int num_methods = 0; | |
1528 | |
1529 int i; | |
1530 for (i = 0; i < methods_length; i++) { | |
1531 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1532 if (!method->is_initializer()) { | |
1533 if (!publicOnly || method->is_public()) { | |
1534 ++num_methods; | |
1535 } | |
1536 } | |
1537 } | |
1538 | |
1539 // Allocate result | |
1540 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL); | |
1541 objArrayHandle result (THREAD, r); | |
1542 | |
1543 int out_idx = 0; | |
1544 for (i = 0; i < methods_length; i++) { | |
1545 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1546 if (!method->is_initializer()) { | |
1547 if (!publicOnly || method->is_public()) { | |
1548 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1549 result->obj_at_put(out_idx, m); | |
1550 ++out_idx; | |
1551 } | |
1552 } | |
1553 } | |
1554 assert(out_idx == num_methods, "just checking"); | |
1555 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1556 } | |
1557 JVM_END | |
1558 | |
1559 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1560 { | |
1561 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1562 JvmtiVMObjectAllocEventCollector oam; | |
1563 | |
1564 // Exclude primitive types and array types | |
1565 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1566 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1567 // Return empty array | |
1568 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL); | |
1569 return (jobjectArray) JNIHandles::make_local(env, res); | |
1570 } | |
1571 | |
1572 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1573 | |
1574 // Ensure class is linked | |
1575 k->link_class(CHECK_NULL); | |
1576 | |
1577 objArrayHandle methods (THREAD, k->methods()); | |
1578 int methods_length = methods->length(); | |
1579 int num_constructors = 0; | |
1580 | |
1581 int i; | |
1582 for (i = 0; i < methods_length; i++) { | |
1583 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1584 if (method->is_initializer() && !method->is_static()) { | |
1585 if (!publicOnly || method->is_public()) { | |
1586 ++num_constructors; | |
1587 } | |
1588 } | |
1589 } | |
1590 | |
1591 // Allocate result | |
1592 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL); | |
1593 objArrayHandle result(THREAD, r); | |
1594 | |
1595 int out_idx = 0; | |
1596 for (i = 0; i < methods_length; i++) { | |
1597 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1598 if (method->is_initializer() && !method->is_static()) { | |
1599 if (!publicOnly || method->is_public()) { | |
1600 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1601 result->obj_at_put(out_idx, m); | |
1602 ++out_idx; | |
1603 } | |
1604 } | |
1605 } | |
1606 assert(out_idx == num_constructors, "just checking"); | |
1607 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1608 } | |
1609 JVM_END | |
1610 | |
1611 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1612 { | |
1613 JVMWrapper("JVM_GetClassAccessFlags"); | |
1614 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1615 // Primitive type | |
1616 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1617 } | |
1618 | |
1619 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1620 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1621 } | |
1622 JVM_END | |
1623 | |
1624 | |
1625 // Constant pool access ////////////////////////////////////////////////////////// | |
1626 | |
1627 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1628 { | |
1629 JVMWrapper("JVM_GetClassConstantPool"); | |
1630 JvmtiVMObjectAllocEventCollector oam; | |
1631 | |
1632 // Return null for primitives and arrays | |
1633 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1634 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1635 if (Klass::cast(k)->oop_is_instance()) { | |
1636 instanceKlassHandle k_h(THREAD, k); | |
1637 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1638 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1639 return JNIHandles::make_local(jcp()); | |
1640 } | |
1641 } | |
1642 return NULL; | |
1643 } | |
1644 JVM_END | |
1645 | |
1646 | |
1647 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1648 { | |
1649 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1650 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1651 return cp->length(); | |
1652 } | |
1653 JVM_END | |
1654 | |
1655 | |
1656 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1657 if (!cp->is_within_bounds(index)) { | |
1658 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1659 } | |
1660 } | |
1661 | |
1662 | |
1663 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1664 { | |
1665 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1666 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1667 bounds_check(cp, index, CHECK_NULL); | |
1668 constantTag tag = cp->tag_at(index); | |
1669 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1670 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1671 } | |
1672 klassOop k = cp->klass_at(index, CHECK_NULL); | |
1673 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1674 } | |
1675 JVM_END | |
1676 | |
1677 | |
1678 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1679 { | |
1680 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1681 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1682 bounds_check(cp, index, CHECK_NULL); | |
1683 constantTag tag = cp->tag_at(index); | |
1684 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1685 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1686 } | |
1687 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1688 if (k == NULL) return NULL; | |
1689 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1690 } | |
1691 JVM_END | |
1692 | |
1693 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1694 constantTag tag = cp->tag_at(index); | |
1695 if (!tag.is_method() && !tag.is_interface_method()) { | |
1696 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1697 } | |
1698 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1699 klassOop k_o; | |
1700 if (force_resolution) { | |
1701 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1702 } else { | |
1703 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1704 if (k_o == NULL) return NULL; | |
1705 } | |
1706 instanceKlassHandle k(THREAD, k_o); | |
1707 symbolOop name = cp->uncached_name_ref_at(index); | |
1708 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1709 methodHandle m (THREAD, k->find_method(name, sig)); | |
1710 if (m.is_null()) { | |
1711 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1712 } | |
1713 oop method; | |
1714 if (!m->is_initializer() || m->is_static()) { | |
1715 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1716 } else { | |
1717 method = Reflection::new_constructor(m, CHECK_NULL); | |
1718 } | |
1719 return JNIHandles::make_local(method); | |
1720 } | |
1721 | |
1722 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1723 { | |
1724 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1725 JvmtiVMObjectAllocEventCollector oam; | |
1726 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1727 bounds_check(cp, index, CHECK_NULL); | |
1728 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1729 return res; | |
1730 } | |
1731 JVM_END | |
1732 | |
1733 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1734 { | |
1735 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1736 JvmtiVMObjectAllocEventCollector oam; | |
1737 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1738 bounds_check(cp, index, CHECK_NULL); | |
1739 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1740 return res; | |
1741 } | |
1742 JVM_END | |
1743 | |
1744 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1745 constantTag tag = cp->tag_at(index); | |
1746 if (!tag.is_field()) { | |
1747 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1748 } | |
1749 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1750 klassOop k_o; | |
1751 if (force_resolution) { | |
1752 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1753 } else { | |
1754 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1755 if (k_o == NULL) return NULL; | |
1756 } | |
1757 instanceKlassHandle k(THREAD, k_o); | |
1758 symbolOop name = cp->uncached_name_ref_at(index); | |
1759 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1760 fieldDescriptor fd; | |
1761 klassOop target_klass = k->find_field(name, sig, &fd); | |
1762 if (target_klass == NULL) { | |
1763 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1764 } | |
1765 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1766 return JNIHandles::make_local(field); | |
1767 } | |
1768 | |
1769 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1770 { | |
1771 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1772 JvmtiVMObjectAllocEventCollector oam; | |
1773 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1774 bounds_check(cp, index, CHECK_NULL); | |
1775 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1776 return res; | |
1777 } | |
1778 JVM_END | |
1779 | |
1780 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1781 { | |
1782 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1783 JvmtiVMObjectAllocEventCollector oam; | |
1784 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1785 bounds_check(cp, index, CHECK_NULL); | |
1786 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1787 return res; | |
1788 } | |
1789 JVM_END | |
1790 | |
1791 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1792 { | |
1793 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1794 JvmtiVMObjectAllocEventCollector oam; | |
1795 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1796 bounds_check(cp, index, CHECK_NULL); | |
1797 constantTag tag = cp->tag_at(index); | |
1798 if (!tag.is_field_or_method()) { | |
1799 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1800 } | |
1801 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1802 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); | |
1803 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); | |
1804 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); | |
1805 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL); | |
1806 objArrayHandle dest(THREAD, dest_o); | |
1807 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1808 dest->obj_at_put(0, str()); | |
1809 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1810 dest->obj_at_put(1, str()); | |
1811 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1812 dest->obj_at_put(2, str()); | |
1813 return (jobjectArray) JNIHandles::make_local(dest()); | |
1814 } | |
1815 JVM_END | |
1816 | |
1817 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1818 { | |
1819 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1820 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1821 bounds_check(cp, index, CHECK_0); | |
1822 constantTag tag = cp->tag_at(index); | |
1823 if (!tag.is_int()) { | |
1824 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1825 } | |
1826 return cp->int_at(index); | |
1827 } | |
1828 JVM_END | |
1829 | |
1830 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1831 { | |
1832 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1833 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1834 bounds_check(cp, index, CHECK_(0L)); | |
1835 constantTag tag = cp->tag_at(index); | |
1836 if (!tag.is_long()) { | |
1837 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1838 } | |
1839 return cp->long_at(index); | |
1840 } | |
1841 JVM_END | |
1842 | |
1843 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1844 { | |
1845 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1846 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1847 bounds_check(cp, index, CHECK_(0.0f)); | |
1848 constantTag tag = cp->tag_at(index); | |
1849 if (!tag.is_float()) { | |
1850 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1851 } | |
1852 return cp->float_at(index); | |
1853 } | |
1854 JVM_END | |
1855 | |
1856 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1857 { | |
1858 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1860 bounds_check(cp, index, CHECK_(0.0)); | |
1861 constantTag tag = cp->tag_at(index); | |
1862 if (!tag.is_double()) { | |
1863 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1864 } | |
1865 return cp->double_at(index); | |
1866 } | |
1867 JVM_END | |
1868 | |
1869 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1870 { | |
1871 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1873 bounds_check(cp, index, CHECK_NULL); | |
1874 constantTag tag = cp->tag_at(index); | |
1875 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1877 } | |
1878 oop str = cp->string_at(index, CHECK_NULL); | |
1879 return (jstring) JNIHandles::make_local(str); | |
1880 } | |
1881 JVM_END | |
1882 | |
1883 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1884 { | |
1885 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
1886 JvmtiVMObjectAllocEventCollector oam; | |
1887 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1888 bounds_check(cp, index, CHECK_NULL); | |
1889 constantTag tag = cp->tag_at(index); | |
1890 if (!tag.is_symbol()) { | |
1891 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1892 } | |
1893 symbolOop sym_o = cp->symbol_at(index); | |
1894 symbolHandle sym(THREAD, sym_o); | |
1895 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1896 return (jstring) JNIHandles::make_local(str()); | |
1897 } | |
1898 JVM_END | |
1899 | |
1900 | |
1901 // Assertion support. ////////////////////////////////////////////////////////// | |
1902 | |
1903 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
1904 JVMWrapper("JVM_DesiredAssertionStatus"); | |
1905 assert(cls != NULL, "bad class"); | |
1906 | |
1907 oop r = JNIHandles::resolve(cls); | |
1908 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
1909 if (java_lang_Class::is_primitive(r)) return false; | |
1910 | |
1911 klassOop k = java_lang_Class::as_klassOop(r); | |
1912 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
1913 if (! Klass::cast(k)->oop_is_instance()) return false; | |
1914 | |
1915 ResourceMark rm(THREAD); | |
1916 const char* name = Klass::cast(k)->name()->as_C_string(); | |
1917 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
1918 return JavaAssertions::enabled(name, system_class); | |
1919 | |
1920 JVM_END | |
1921 | |
1922 | |
1923 // Return a new AssertionStatusDirectives object with the fields filled in with | |
1924 // command-line assertion arguments (i.e., -ea, -da). | |
1925 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
1926 JVMWrapper("JVM_AssertionStatusDirectives"); | |
1927 JvmtiVMObjectAllocEventCollector oam; | |
1928 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
1929 return JNIHandles::make_local(env, asd); | |
1930 JVM_END | |
1931 | |
1932 // Verification //////////////////////////////////////////////////////////////////////////////// | |
1933 | |
1934 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
1935 | |
1936 // RedefineClasses support: bug 6214132 caused verification to fail. | |
1937 // All functions from this section should call the jvmtiThreadSate function: | |
1938 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
1939 // The function returns a klassOop of the _scratch_class if the verifier | |
1940 // was invoked in the middle of the class redefinition. | |
1941 // Otherwise it returns its argument value which is the _the_class klassOop. | |
1942 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
1943 | |
1944 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
1945 JVMWrapper("JVM_GetClassNameUTF"); | |
1946 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1947 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1948 return Klass::cast(k)->name()->as_utf8(); | |
1949 JVM_END | |
1950 | |
1951 | |
1952 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
1953 JVMWrapper("JVM_GetClassCPTypes"); | |
1954 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1955 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1956 // types will have length zero if this is not an instanceKlass | |
1957 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
1958 if (Klass::cast(k)->oop_is_instance()) { | |
1959 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
1960 for (int index = cp->length() - 1; index >= 0; index--) { | |
1961 constantTag tag = cp->tag_at(index); | |
1962 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
1963 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
1964 } | |
1965 } | |
1966 JVM_END | |
1967 | |
1968 | |
1969 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
1970 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
1971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1972 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1973 if (!Klass::cast(k)->oop_is_instance()) | |
1974 return 0; | |
1975 return instanceKlass::cast(k)->constants()->length(); | |
1976 JVM_END | |
1977 | |
1978 | |
1979 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
1980 JVMWrapper("JVM_GetClassFieldsCount"); | |
1981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1982 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1983 if (!Klass::cast(k)->oop_is_instance()) | |
1984 return 0; | |
1985 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; | |
1986 JVM_END | |
1987 | |
1988 | |
1989 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
1990 JVMWrapper("JVM_GetClassMethodsCount"); | |
1991 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1992 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1993 if (!Klass::cast(k)->oop_is_instance()) | |
1994 return 0; | |
1995 return instanceKlass::cast(k)->methods()->length(); | |
1996 JVM_END | |
1997 | |
1998 | |
1999 // The following methods, used for the verifier, are never called with | |
2000 // array klasses, so a direct cast to instanceKlass is safe. | |
2001 // Typically, these methods are called in a loop with bounds determined | |
2002 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2003 // zero for arrays. | |
2004 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2005 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2006 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2007 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2008 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2009 int length = methodOop(method)->checked_exceptions_length(); | |
2010 if (length > 0) { | |
2011 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2012 for (int i = 0; i < length; i++) { | |
2013 exceptions[i] = table[i].class_cp_index; | |
2014 } | |
2015 } | |
2016 JVM_END | |
2017 | |
2018 | |
2019 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2020 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2021 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2022 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2023 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2024 return methodOop(method)->checked_exceptions_length(); | |
2025 JVM_END | |
2026 | |
2027 | |
2028 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2029 JVMWrapper("JVM_GetMethodIxByteCode"); | |
2030 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2031 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2032 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2033 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2034 JVM_END | |
2035 | |
2036 | |
2037 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2038 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
2039 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2040 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2041 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2042 return methodOop(method)->code_size(); | |
2043 JVM_END | |
2044 | |
2045 | |
2046 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2047 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
2048 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2049 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2050 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2051 typeArrayOop extable = methodOop(method)->exception_table(); | |
2052 entry->start_pc = extable->int_at(entry_index * 4); | |
2053 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2054 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2055 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2056 JVM_END | |
2057 | |
2058 | |
2059 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2060 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2061 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2062 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2063 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2064 return methodOop(method)->exception_table()->length() / 4; | |
2065 JVM_END | |
2066 | |
2067 | |
2068 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2069 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2070 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2071 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2072 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2073 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2074 JVM_END | |
2075 | |
2076 | |
2077 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2078 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2080 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2081 typeArrayOop fields = instanceKlass::cast(k)->fields(); | |
2082 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2083 JVM_END | |
2084 | |
2085 | |
2086 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2087 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2088 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2089 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2090 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2091 return methodOop(method)->max_locals(); | |
2092 JVM_END | |
2093 | |
2094 | |
2095 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2096 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2097 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2098 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2099 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2100 return methodOop(method)->size_of_parameters(); | |
2101 JVM_END | |
2102 | |
2103 | |
2104 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2105 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2106 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2107 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2108 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2109 return methodOop(method)->max_stack(); | |
2110 JVM_END | |
2111 | |
2112 | |
2113 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2114 JVMWrapper("JVM_IsConstructorIx"); | |
2115 ResourceMark rm(THREAD); | |
2116 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2117 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2118 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2119 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2120 JVM_END | |
2121 | |
2122 | |
2123 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2124 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2125 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2126 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2127 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2128 return methodOop(method)->name()->as_utf8(); | |
2129 JVM_END | |
2130 | |
2131 | |
2132 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2133 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2134 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2135 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2136 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2137 return methodOop(method)->signature()->as_utf8(); | |
2138 JVM_END | |
2139 | |
2140 /** | |
2141 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2142 * read entries in the constant pool. Since the old verifier always | |
2143 * works on a copy of the code, it will not see any rewriting that | |
2144 * may possibly occur in the middle of verification. So it is important | |
2145 * that nothing it calls tries to use the cpCache instead of the raw | |
2146 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2147 */ | |
2148 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2149 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2150 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2151 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2152 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2153 switch (cp->tag_at(cp_index).value()) { | |
2154 case JVM_CONSTANT_Fieldref: | |
2155 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2156 default: | |
2157 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2158 } | |
2159 ShouldNotReachHere(); | |
2160 return NULL; | |
2161 JVM_END | |
2162 | |
2163 | |
2164 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2165 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2168 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2169 switch (cp->tag_at(cp_index).value()) { | |
2170 case JVM_CONSTANT_InterfaceMethodref: | |
2171 case JVM_CONSTANT_Methodref: | |
2172 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2173 default: | |
2174 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2175 } | |
2176 ShouldNotReachHere(); | |
2177 return NULL; | |
2178 JVM_END | |
2179 | |
2180 | |
2181 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2182 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2183 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2184 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2185 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2186 switch (cp->tag_at(cp_index).value()) { | |
2187 case JVM_CONSTANT_InterfaceMethodref: | |
2188 case JVM_CONSTANT_Methodref: | |
2189 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2190 default: | |
2191 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2192 } | |
2193 ShouldNotReachHere(); | |
2194 return NULL; | |
2195 JVM_END | |
2196 | |
2197 | |
2198 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2199 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2200 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2201 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2202 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2203 switch (cp->tag_at(cp_index).value()) { | |
2204 case JVM_CONSTANT_Fieldref: | |
2205 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2206 default: | |
2207 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2208 } | |
2209 ShouldNotReachHere(); | |
2210 return NULL; | |
2211 JVM_END | |
2212 | |
2213 | |
2214 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2215 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2216 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2217 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2218 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2219 symbolOop classname = cp->klass_name_at(cp_index); | |
2220 return classname->as_utf8(); | |
2221 JVM_END | |
2222 | |
2223 | |
2224 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2225 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2226 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2227 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2228 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2229 switch (cp->tag_at(cp_index).value()) { | |
2230 case JVM_CONSTANT_Fieldref: { | |
2231 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2232 symbolOop classname = cp->klass_name_at(class_index); | |
2233 return classname->as_utf8(); | |
2234 } | |
2235 default: | |
2236 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2237 } | |
2238 ShouldNotReachHere(); | |
2239 return NULL; | |
2240 JVM_END | |
2241 | |
2242 | |
2243 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2244 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2245 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2246 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2247 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2248 switch (cp->tag_at(cp_index).value()) { | |
2249 case JVM_CONSTANT_Methodref: | |
2250 case JVM_CONSTANT_InterfaceMethodref: { | |
2251 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2252 symbolOop classname = cp->klass_name_at(class_index); | |
2253 return classname->as_utf8(); | |
2254 } | |
2255 default: | |
2256 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2257 } | |
2258 ShouldNotReachHere(); | |
2259 return NULL; | |
2260 JVM_END | |
2261 | |
2262 | |
2263 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2264 JVMWrapper("JVM_GetCPFieldModifiers"); | |
2265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2266 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2268 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2269 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2270 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2271 switch (cp->tag_at(cp_index).value()) { | |
2272 case JVM_CONSTANT_Fieldref: { | |
2273 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2274 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2275 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); | |
2276 int fields_count = fields->length(); | |
2277 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { | |
2278 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && | |
2279 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { | |
2280 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2281 } | |
2282 } | |
2283 return -1; | |
2284 } | |
2285 default: | |
2286 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2287 } | |
2288 ShouldNotReachHere(); | |
2289 return 0; | |
2290 JVM_END | |
2291 | |
2292 | |
2293 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2294 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2295 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2296 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2298 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2299 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2300 switch (cp->tag_at(cp_index).value()) { | |
2301 case JVM_CONSTANT_Methodref: | |
2302 case JVM_CONSTANT_InterfaceMethodref: { | |
2303 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2304 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2305 objArrayOop methods = instanceKlass::cast(k_called)->methods(); | |
2306 int methods_count = methods->length(); | |
2307 for (int i = 0; i < methods_count; i++) { | |
2308 methodOop method = methodOop(methods->obj_at(i)); | |
2309 if (method->name() == name && method->signature() == signature) { | |
2310 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2311 } | |
2312 } | |
2313 return -1; | |
2314 } | |
2315 default: | |
2316 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2317 } | |
2318 ShouldNotReachHere(); | |
2319 return 0; | |
2320 JVM_END | |
2321 | |
2322 | |
2323 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2324 | |
2325 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2326 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2327 JVM_END | |
2328 | |
2329 | |
2330 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2331 JVMWrapper("JVM_IsSameClassPackage"); | |
2332 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2333 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2334 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2335 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2336 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2337 JVM_END | |
2338 | |
2339 | |
2340 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2341 | |
2342 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2343 JVMWrapper2("JVM_Open (%s)", fname); | |
2344 | |
2345 //%note jvm_r6 | |
2346 int result = hpi::open(fname, flags, mode); | |
2347 if (result >= 0) { | |
2348 return result; | |
2349 } else { | |
2350 switch(errno) { | |
2351 case EEXIST: | |
2352 return JVM_EEXIST; | |
2353 default: | |
2354 return -1; | |
2355 } | |
2356 } | |
2357 JVM_END | |
2358 | |
2359 | |
2360 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2361 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2362 //%note jvm_r6 | |
2363 return hpi::close(fd); | |
2364 JVM_END | |
2365 | |
2366 | |
2367 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2368 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2369 | |
2370 //%note jvm_r6 | |
2371 return (jint)hpi::read(fd, buf, nbytes); | |
2372 JVM_END | |
2373 | |
2374 | |
2375 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2376 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2377 | |
2378 //%note jvm_r6 | |
2379 return (jint)hpi::write(fd, buf, nbytes); | |
2380 JVM_END | |
2381 | |
2382 | |
2383 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2384 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2385 //%note jvm_r6 | |
2386 return hpi::available(fd, pbytes); | |
2387 JVM_END | |
2388 | |
2389 | |
2390 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2391 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2392 //%note jvm_r6 | |
2393 return hpi::lseek(fd, offset, whence); | |
2394 JVM_END | |
2395 | |
2396 | |
2397 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2398 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
2399 return hpi::ftruncate(fd, length); | |
2400 JVM_END | |
2401 | |
2402 | |
2403 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2404 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2405 //%note jvm_r6 | |
2406 return hpi::fsync(fd); | |
2407 JVM_END | |
2408 | |
2409 | |
2410 // Printing support ////////////////////////////////////////////////// | |
2411 extern "C" { | |
2412 | |
2413 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2414 // see bug 4399518, 4417214 | |
2415 if ((intptr_t)count <= 0) return -1; | |
2416 return vsnprintf(str, count, fmt, args); | |
2417 } | |
2418 | |
2419 | |
2420 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2421 va_list args; | |
2422 int len; | |
2423 va_start(args, fmt); | |
2424 len = jio_vsnprintf(str, count, fmt, args); | |
2425 va_end(args); | |
2426 return len; | |
2427 } | |
2428 | |
2429 | |
2430 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2431 int len; | |
2432 va_list args; | |
2433 va_start(args, fmt); | |
2434 len = jio_vfprintf(f, fmt, args); | |
2435 va_end(args); | |
2436 return len; | |
2437 } | |
2438 | |
2439 | |
2440 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2441 if (Arguments::vfprintf_hook() != NULL) { | |
2442 return Arguments::vfprintf_hook()(f, fmt, args); | |
2443 } else { | |
2444 return vfprintf(f, fmt, args); | |
2445 } | |
2446 } | |
2447 | |
2448 | |
2449 int jio_printf(const char *fmt, ...) { | |
2450 int len; | |
2451 va_list args; | |
2452 va_start(args, fmt); | |
2453 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2454 va_end(args); | |
2455 return len; | |
2456 } | |
2457 | |
2458 | |
2459 // HotSpot specific jio method | |
2460 void jio_print(const char* s) { | |
2461 // Try to make this function as atomic as possible. | |
2462 if (Arguments::vfprintf_hook() != NULL) { | |
2463 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2464 } else { | |
2465 ::write(defaultStream::output_fd(), s, (int)strlen(s)); | |
2466 } | |
2467 } | |
2468 | |
2469 } // Extern C | |
2470 | |
2471 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2472 | |
2473 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2474 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2475 // OSThread objects. The exception to this rule is when the target object is the thread | |
2476 // doing the operation, in which case we know that the thread won't exit until the | |
2477 // operation is done (all exits being voluntary). There are a few cases where it is | |
2478 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2479 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2480 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2481 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2482 // implementation is local to this file, we always lock Threads_lock for that one. | |
2483 | |
2484 static void thread_entry(JavaThread* thread, TRAPS) { | |
2485 HandleMark hm(THREAD); | |
2486 Handle obj(THREAD, thread->threadObj()); | |
2487 JavaValue result(T_VOID); | |
2488 JavaCalls::call_virtual(&result, | |
2489 obj, | |
2490 KlassHandle(THREAD, SystemDictionary::thread_klass()), | |
2491 vmSymbolHandles::run_method_name(), | |
2492 vmSymbolHandles::void_method_signature(), | |
2493 THREAD); | |
2494 } | |
2495 | |
2496 | |
2497 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2498 JVMWrapper("JVM_StartThread"); | |
2499 JavaThread *native_thread = NULL; | |
2500 | |
2501 // We cannot hold the Threads_lock when we throw an exception, | |
2502 // due to rank ordering issues. Example: we might need to grab the | |
2503 // Heap_lock while we construct the exception. | |
2504 bool throw_illegal_thread_state = false; | |
2505 | |
2506 // We must release the Threads_lock before we can post a jvmti event | |
2507 // in Thread::start. | |
2508 { | |
2509 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2510 // we operate. | |
2511 MutexLocker mu(Threads_lock); | |
2512 | |
2513 // Check to see if we're running a thread that's already exited or was | |
2514 // stopped (is_stillborn) or is still active (thread is not NULL). | |
2515 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || | |
2516 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { | |
2517 throw_illegal_thread_state = true; | |
2518 } else { | |
2519 jlong size = | |
2520 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2521 // Allocate the C++ Thread structure and create the native thread. The | |
2522 // stack size retrieved from java is signed, but the constructor takes | |
2523 // size_t (an unsigned type), so avoid passing negative values which would | |
2524 // result in really large stacks. | |
2525 size_t sz = size > 0 ? (size_t) size : 0; | |
2526 native_thread = new JavaThread(&thread_entry, sz); | |
2527 | |
2528 // At this point it may be possible that no osthread was created for the | |
2529 // JavaThread due to lack of memory. Check for this situation and throw | |
2530 // an exception if necessary. Eventually we may want to change this so | |
2531 // that we only grab the lock if the thread was created successfully - | |
2532 // then we can also do this check and throw the exception in the | |
2533 // JavaThread constructor. | |
2534 if (native_thread->osthread() != NULL) { | |
2535 // Note: the current thread is not being used within "prepare". | |
2536 native_thread->prepare(jthread); | |
2537 } | |
2538 } | |
2539 } | |
2540 | |
2541 if (throw_illegal_thread_state) { | |
2542 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2543 } | |
2544 | |
2545 assert(native_thread != NULL, "Starting null thread?"); | |
2546 | |
2547 if (native_thread->osthread() == NULL) { | |
2548 // No one should hold a reference to the 'native_thread'. | |
2549 delete native_thread; | |
2550 if (JvmtiExport::should_post_resource_exhausted()) { | |
2551 JvmtiExport::post_resource_exhausted( | |
2552 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2553 "unable to create new native thread"); | |
2554 } | |
2555 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2556 "unable to create new native thread"); | |
2557 } | |
2558 | |
2559 Thread::start(native_thread); | |
2560 | |
2561 JVM_END | |
2562 | |
2563 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2564 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2565 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2566 // save thread as the sender, no safepoint is needed. | |
2567 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) | |
2568 JVMWrapper("JVM_StopThread"); | |
2569 | |
2570 oop java_throwable = JNIHandles::resolve(throwable); | |
2571 if (java_throwable == NULL) { | |
2572 THROW(vmSymbols::java_lang_NullPointerException()); | |
2573 } | |
2574 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2575 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2576 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); | |
2577 // First check if thread already exited | |
2578 if (receiver != NULL) { | |
2579 // Check if exception is getting thrown at self (use oop equality, since the | |
2580 // target object might exit) | |
2581 if (java_thread == thread->threadObj()) { | |
2582 // This is a change from JDK 1.1, but JDK 1.2 will also do it: | |
2583 // NOTE (from JDK 1.2): this is done solely to prevent stopped | |
2584 // threads from being restarted. | |
2585 // Fix for 4314342, 4145910, perhaps others: it now doesn't have | |
2586 // any effect on the "liveness" of a thread; see | |
2587 // JVM_IsThreadAlive, below. | |
2588 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) { | |
2589 java_lang_Thread::set_stillborn(java_thread); | |
2590 } | |
2591 THROW_OOP(java_throwable); | |
2592 } else { | |
2593 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2594 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2595 } | |
2596 } | |
2597 JVM_END | |
2598 | |
2599 | |
2600 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2601 JVMWrapper("JVM_IsThreadAlive"); | |
2602 | |
2603 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2604 return java_lang_Thread::is_alive(thread_oop); | |
2605 JVM_END | |
2606 | |
2607 | |
2608 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2609 JVMWrapper("JVM_SuspendThread"); | |
2610 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2611 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2612 | |
2613 if (receiver != NULL) { | |
2614 // thread has run and has not exited (still on threads list) | |
2615 | |
2616 { | |
2617 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2618 if (receiver->is_external_suspend()) { | |
2619 // Don't allow nested external suspend requests. We can't return | |
2620 // an error from this interface so just ignore the problem. | |
2621 return; | |
2622 } | |
2623 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2624 return; | |
2625 } | |
2626 receiver->set_external_suspend(); | |
2627 } | |
2628 | |
2629 // java_suspend() will catch threads in the process of exiting | |
2630 // and will ignore them. | |
2631 receiver->java_suspend(); | |
2632 | |
2633 // It would be nice to have the following assertion in all the | |
2634 // time, but it is possible for a racing resume request to have | |
2635 // resumed this thread right after we suspended it. Temporarily | |
2636 // enable this assertion if you are chasing a different kind of | |
2637 // bug. | |
2638 // | |
2639 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2640 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2641 } | |
2642 JVM_END | |
2643 | |
2644 | |
2645 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2646 JVMWrapper("JVM_ResumeThread"); | |
2647 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2648 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2649 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2650 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2651 // looks at it. | |
2652 MutexLocker ml(Threads_lock); | |
2653 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2654 if (thr != NULL) { | |
2655 // the thread has run and is not in the process of exiting | |
2656 thr->java_resume(); | |
2657 } | |
2658 JVM_END | |
2659 | |
2660 | |
2661 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2662 JVMWrapper("JVM_SetThreadPriority"); | |
2663 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2664 MutexLocker ml(Threads_lock); | |
2665 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2666 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2667 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2668 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2669 Thread::set_priority(thr, (ThreadPriority)prio); | |
2670 } | |
2671 JVM_END | |
2672 | |
2673 | |
2674 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2675 JVMWrapper("JVM_Yield"); | |
2676 if (os::dont_yield()) return; | |
2677 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. | |
2678 // Critical for similar threading behaviour | |
2679 if (ConvertYieldToSleep) { | |
2680 os::sleep(thread, MinSleepInterval, false); | |
2681 } else { | |
2682 os::yield(); | |
2683 } | |
2684 JVM_END | |
2685 | |
2686 | |
2687 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2688 JVMWrapper("JVM_Sleep"); | |
2689 | |
2690 if (millis < 0) { | |
2691 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2692 } | |
2693 | |
2694 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2695 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2696 } | |
2697 | |
2698 // Save current thread state and restore it at the end of this block. | |
2699 // And set new thread state to SLEEPING. | |
2700 JavaThreadSleepState jtss(thread); | |
2701 | |
2702 if (millis == 0) { | |
2703 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2704 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2705 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2706 // for SOLARIS | |
2707 if (ConvertSleepToYield) { | |
2708 os::yield(); | |
2709 } else { | |
2710 ThreadState old_state = thread->osthread()->get_state(); | |
2711 thread->osthread()->set_state(SLEEPING); | |
2712 os::sleep(thread, MinSleepInterval, false); | |
2713 thread->osthread()->set_state(old_state); | |
2714 } | |
2715 } else { | |
2716 ThreadState old_state = thread->osthread()->get_state(); | |
2717 thread->osthread()->set_state(SLEEPING); | |
2718 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2719 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2720 // us while we were sleeping. We do not overwrite those. | |
2721 if (!HAS_PENDING_EXCEPTION) { | |
2722 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() | |
2723 // to properly restore the thread state. That's likely wrong. | |
2724 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2725 } | |
2726 } | |
2727 thread->osthread()->set_state(old_state); | |
2728 } | |
2729 JVM_END | |
2730 | |
2731 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2732 JVMWrapper("JVM_CurrentThread"); | |
2733 oop jthread = thread->threadObj(); | |
2734 assert (thread != NULL, "no current thread!"); | |
2735 return JNIHandles::make_local(env, jthread); | |
2736 JVM_END | |
2737 | |
2738 | |
2739 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2740 JVMWrapper("JVM_CountStackFrames"); | |
2741 | |
2742 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2743 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2744 bool throw_illegal_thread_state = false; | |
2745 int count = 0; | |
2746 | |
2747 { | |
2748 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2749 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2750 // acquire of the lock | |
2751 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2752 | |
2753 if (thr == NULL) { | |
2754 // do nothing | |
2755 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2756 // Check whether this java thread has been suspended already. If not, throws | |
2757 // IllegalThreadStateException. We defer to throw that exception until | |
2758 // Threads_lock is released since loading exception class has to leave VM. | |
2759 // The correct way to test a thread is actually suspended is | |
2760 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2761 // the Threads_lock. The above tests are sufficient for our purposes | |
2762 // provided the walkability of the stack is stable - which it isn't | |
2763 // 100% but close enough for most practical purposes. | |
2764 throw_illegal_thread_state = true; | |
2765 } else { | |
2766 // Count all java activation, i.e., number of vframes | |
2767 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2768 // Native frames are not counted | |
2769 if (!vfst.method()->is_native()) count++; | |
2770 } | |
2771 } | |
2772 } | |
2773 | |
2774 if (throw_illegal_thread_state) { | |
2775 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2776 "this thread is not suspended"); | |
2777 } | |
2778 return count; | |
2779 JVM_END | |
2780 | |
2781 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2782 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2783 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2784 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2785 // outside the critical section. Threads_lock is hot so we want to minimize | |
2786 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2787 // two steps. The 1st phase, performed under Threads_lock, would return | |
2788 // a closure that'd be invoked after Threads_lock was dropped. | |
2789 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2790 // admit spurious wakeups. | |
2791 | |
2792 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2793 JVMWrapper("JVM_Interrupt"); | |
2794 | |
2795 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2796 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2797 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2798 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2799 // acquire of the lock | |
2800 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2801 if (thr != NULL) { | |
2802 Thread::interrupt(thr); | |
2803 } | |
2804 JVM_END | |
2805 | |
2806 | |
2807 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2808 JVMWrapper("JVM_IsInterrupted"); | |
2809 | |
2810 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2811 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2812 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2813 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2814 // acquire of the lock | |
2815 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2816 if (thr == NULL) { | |
2817 return JNI_FALSE; | |
2818 } else { | |
2819 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2820 } | |
2821 JVM_END | |
2822 | |
2823 | |
2824 // Return true iff the current thread has locked the object passed in | |
2825 | |
2826 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2827 JVMWrapper("JVM_HoldsLock"); | |
2828 assert(THREAD->is_Java_thread(), "sanity check"); | |
2829 if (obj == NULL) { | |
2830 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
2831 } | |
2832 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
2833 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
2834 JVM_END | |
2835 | |
2836 | |
2837 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
2838 JVMWrapper("JVM_DumpAllStacks"); | |
2839 VM_PrintThreads op; | |
2840 VMThread::execute(&op); | |
2841 if (JvmtiExport::should_post_data_dump()) { | |
2842 JvmtiExport::post_data_dump(); | |
2843 } | |
2844 JVM_END | |
2845 | |
2846 | |
2847 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
2848 | |
2849 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
2850 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
2851 if (jthread->privileged_stack_top() == NULL) return false; | |
2852 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
2853 oop loader = jthread->privileged_stack_top()->class_loader(); | |
2854 if (loader == NULL) return true; | |
2855 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
2856 if (trusted) return true; | |
2857 } | |
2858 return false; | |
2859 } | |
2860 | |
2861 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
2862 JVMWrapper("JVM_CurrentLoadedClass"); | |
2863 ResourceMark rm(THREAD); | |
2864 | |
2865 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2866 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2867 bool trusted = is_trusted_frame(thread, &vfst); | |
2868 if (trusted) return NULL; | |
2869 | |
2870 methodOop m = vfst.method(); | |
2871 if (!m->is_native()) { | |
2872 klassOop holder = m->method_holder(); | |
2873 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2874 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2875 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
2876 } | |
2877 } | |
2878 } | |
2879 return NULL; | |
2880 JVM_END | |
2881 | |
2882 | |
2883 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
2884 JVMWrapper("JVM_CurrentClassLoader"); | |
2885 ResourceMark rm(THREAD); | |
2886 | |
2887 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2888 | |
2889 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2890 bool trusted = is_trusted_frame(thread, &vfst); | |
2891 if (trusted) return NULL; | |
2892 | |
2893 methodOop m = vfst.method(); | |
2894 if (!m->is_native()) { | |
2895 klassOop holder = m->method_holder(); | |
2896 assert(holder->is_klass(), "just checking"); | |
2897 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2898 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2899 return JNIHandles::make_local(env, loader); | |
2900 } | |
2901 } | |
2902 } | |
2903 return NULL; | |
2904 JVM_END | |
2905 | |
2906 | |
2907 // Utility object for collecting method holders walking down the stack | |
2908 class KlassLink: public ResourceObj { | |
2909 public: | |
2910 KlassHandle klass; | |
2911 KlassLink* next; | |
2912 | |
2913 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
2914 }; | |
2915 | |
2916 | |
2917 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
2918 JVMWrapper("JVM_GetClassContext"); | |
2919 ResourceMark rm(THREAD); | |
2920 JvmtiVMObjectAllocEventCollector oam; | |
2921 // Collect linked list of (handles to) method holders | |
2922 KlassLink* first = NULL; | |
2923 KlassLink* last = NULL; | |
2924 int depth = 0; | |
2925 | |
2926 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
2927 // Native frames are not returned | |
2928 if (!vfst.method()->is_native()) { | |
2929 klassOop holder = vfst.method()->method_holder(); | |
2930 assert(holder->is_klass(), "just checking"); | |
2931 depth++; | |
2932 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
2933 if (first == NULL) { | |
2934 first = last = l; | |
2935 } else { | |
2936 last->next = l; | |
2937 last = l; | |
2938 } | |
2939 } | |
2940 } | |
2941 | |
2942 // Create result array of type [Ljava/lang/Class; | |
2943 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL); | |
2944 // Fill in mirrors corresponding to method holders | |
2945 int index = 0; | |
2946 while (first != NULL) { | |
2947 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
2948 first = first->next; | |
2949 } | |
2950 assert(index == depth, "just checking"); | |
2951 | |
2952 return (jobjectArray) JNIHandles::make_local(env, result); | |
2953 JVM_END | |
2954 | |
2955 | |
2956 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
2957 JVMWrapper("JVM_ClassDepth"); | |
2958 ResourceMark rm(THREAD); | |
2959 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
2960 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
2961 | |
2962 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
2963 symbolHandle class_name_sym = | |
2964 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); | |
2965 if (class_name_sym.is_null()) { | |
2966 return -1; | |
2967 } | |
2968 | |
2969 int depth = 0; | |
2970 | |
2971 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2972 if (!vfst.method()->is_native()) { | |
2973 klassOop holder = vfst.method()->method_holder(); | |
2974 assert(holder->is_klass(), "just checking"); | |
2975 if (instanceKlass::cast(holder)->name() == class_name_sym()) { | |
2976 return depth; | |
2977 } | |
2978 depth++; | |
2979 } | |
2980 } | |
2981 return -1; | |
2982 JVM_END | |
2983 | |
2984 | |
2985 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
2986 JVMWrapper("JVM_ClassLoaderDepth"); | |
2987 ResourceMark rm(THREAD); | |
2988 int depth = 0; | |
2989 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2990 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
2991 bool trusted = is_trusted_frame(thread, &vfst); | |
2992 if (trusted) return -1; | |
2993 | |
2994 methodOop m = vfst.method(); | |
2995 if (!m->is_native()) { | |
2996 klassOop holder = m->method_holder(); | |
2997 assert(holder->is_klass(), "just checking"); | |
2998 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2999 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3000 return depth; | |
3001 } | |
3002 depth++; | |
3003 } | |
3004 } | |
3005 return -1; | |
3006 JVM_END | |
3007 | |
3008 | |
3009 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3010 | |
3011 | |
3012 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3013 JVMWrapper("JVM_GetSystemPackage"); | |
3014 ResourceMark rm(THREAD); | |
3015 JvmtiVMObjectAllocEventCollector oam; | |
3016 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3017 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3018 return (jstring) JNIHandles::make_local(result); | |
3019 JVM_END | |
3020 | |
3021 | |
3022 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3023 JVMWrapper("JVM_GetSystemPackages"); | |
3024 JvmtiVMObjectAllocEventCollector oam; | |
3025 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3026 return (jobjectArray) JNIHandles::make_local(result); | |
3027 JVM_END | |
3028 | |
3029 | |
3030 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3031 | |
3032 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3033 if (current_class == NULL) { | |
3034 return true; | |
3035 } | |
3036 if ((current_class == field_class) || access.is_public()) { | |
3037 return true; | |
3038 } | |
3039 | |
3040 if (access.is_protected()) { | |
3041 // See if current_class is a subclass of field_class | |
3042 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3043 return true; | |
3044 } | |
3045 } | |
3046 | |
3047 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3048 } | |
3049 | |
3050 | |
3051 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3052 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3053 JVMWrapper("JVM_AllocateNewObject"); | |
3054 JvmtiVMObjectAllocEventCollector oam; | |
3055 // Receiver is not used | |
3056 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3057 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3058 | |
3059 // Cannot instantiate primitive types | |
3060 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3061 ResourceMark rm(THREAD); | |
3062 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3063 } | |
3064 | |
3065 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3066 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3067 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3068 ResourceMark rm(THREAD); | |
3069 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3070 } | |
3071 | |
3072 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3073 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3074 | |
3075 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3076 | |
3077 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3078 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3079 | |
3080 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3081 curr_klass->initialize(CHECK_NULL); | |
3082 | |
3083 methodHandle m (THREAD, | |
3084 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3085 vmSymbols::void_method_signature())); | |
3086 if (m.is_null()) { | |
3087 ResourceMark rm(THREAD); | |
3088 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3089 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3090 vmSymbols::object_initializer_name(), | |
3091 vmSymbols::void_method_signature())); | |
3092 } | |
3093 | |
3094 if (curr_klass == init_klass && !m->is_public()) { | |
3095 // Calling the constructor for class 'curr_klass'. | |
3096 // Only allow calls to a public no-arg constructor. | |
3097 // This path corresponds to creating an Externalizable object. | |
3098 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3099 } | |
3100 | |
3101 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3102 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3103 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3104 } | |
3105 | |
3106 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3107 // Call constructor m. This might call a constructor higher up in the hierachy | |
3108 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3109 | |
3110 return JNIHandles::make_local(obj()); | |
3111 JVM_END | |
3112 | |
3113 | |
3114 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3115 JVMWrapper("JVM_AllocateNewArray"); | |
3116 JvmtiVMObjectAllocEventCollector oam; | |
3117 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3118 | |
3119 if (java_lang_Class::is_primitive(mirror)) { | |
3120 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3121 } | |
3122 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3123 oop result; | |
3124 | |
3125 if (k->klass_part()->oop_is_typeArray()) { | |
3126 // typeArray | |
3127 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3128 } else if (k->klass_part()->oop_is_objArray()) { | |
3129 // objArray | |
3130 objArrayKlassHandle oak(THREAD, k); | |
3131 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3132 result = oak->allocate(length, CHECK_NULL); | |
3133 } else { | |
3134 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3135 } | |
3136 return JNIHandles::make_local(env, result); | |
3137 JVM_END | |
3138 | |
3139 | |
3140 // Return the first non-null class loader up the execution stack, or null | |
3141 // if only code from the null class loader is on the stack. | |
3142 | |
3143 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3144 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3145 // UseNewReflection | |
3146 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3147 klassOop holder = vfst.method()->method_holder(); | |
3148 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3149 if (loader != NULL) { | |
3150 return JNIHandles::make_local(env, loader); | |
3151 } | |
3152 } | |
3153 return NULL; | |
3154 JVM_END | |
3155 | |
3156 | |
3157 // Load a class relative to the most recent class on the stack with a non-null | |
3158 // classloader. | |
3159 // This function has been deprecated and should not be considered part of the | |
3160 // specified JVM interface. | |
3161 | |
3162 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3163 jclass currClass, jstring currClassName)) | |
3164 JVMWrapper("JVM_LoadClass0"); | |
3165 // Receiver is not used | |
3166 ResourceMark rm(THREAD); | |
3167 | |
3168 // Class name argument is not guaranteed to be in internal format | |
3169 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3170 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3171 | |
3172 const char* str = java_lang_String::as_utf8_string(string()); | |
3173 | |
3174 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { | |
3175 // It's impossible to create this class; the name cannot fit | |
3176 // into the constant pool. | |
3177 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3178 } | |
3179 | |
3180 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); | |
3181 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); | |
3182 // Find the most recent class on the stack with a non-null classloader | |
3183 oop loader = NULL; | |
3184 oop protection_domain = NULL; | |
3185 if (curr_klass.is_null()) { | |
3186 for (vframeStream vfst(thread); | |
3187 !vfst.at_end() && loader == NULL; | |
3188 vfst.next()) { | |
3189 if (!vfst.method()->is_native()) { | |
3190 klassOop holder = vfst.method()->method_holder(); | |
3191 loader = instanceKlass::cast(holder)->class_loader(); | |
3192 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3193 } | |
3194 } | |
3195 } else { | |
3196 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3197 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3198 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3199 } | |
3200 Handle h_loader(THREAD, loader); | |
3201 Handle h_prot (THREAD, protection_domain); | |
3202 return find_class_from_class_loader(env, name, true, h_loader, h_prot, | |
3203 false, thread); | |
3204 JVM_END | |
3205 | |
3206 | |
3207 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3208 | |
3209 | |
3210 // resolve array handle and check arguments | |
3211 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3212 if (arr == NULL) { | |
3213 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3214 } | |
3215 oop a = JNIHandles::resolve_non_null(arr); | |
3216 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3217 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3218 } | |
3219 return arrayOop(a); | |
3220 } | |
3221 | |
3222 | |
3223 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3224 JVMWrapper("JVM_GetArrayLength"); | |
3225 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3226 return a->length(); | |
3227 JVM_END | |
3228 | |
3229 | |
3230 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3231 JVMWrapper("JVM_Array_Get"); | |
3232 JvmtiVMObjectAllocEventCollector oam; | |
3233 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3234 jvalue value; | |
3235 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3236 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3237 return JNIHandles::make_local(env, box); | |
3238 JVM_END | |
3239 | |
3240 | |
3241 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3242 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3243 jvalue value; | |
3244 value.i = 0; // to initialize value before getting used in CHECK | |
3245 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3246 assert(a->is_typeArray(), "just checking"); | |
3247 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3248 BasicType wide_type = (BasicType) wCode; | |
3249 if (type != wide_type) { | |
3250 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3251 } | |
3252 return value; | |
3253 JVM_END | |
3254 | |
3255 | |
3256 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3257 JVMWrapper("JVM_SetArrayElement"); | |
3258 arrayOop a = check_array(env, arr, false, CHECK); | |
3259 oop box = JNIHandles::resolve(val); | |
3260 jvalue value; | |
3261 value.i = 0; // to initialize value before getting used in CHECK | |
3262 BasicType value_type; | |
3263 if (a->is_objArray()) { | |
3264 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3265 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3266 } else { | |
3267 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3268 } | |
3269 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3270 JVM_END | |
3271 | |
3272 | |
3273 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3274 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3275 arrayOop a = check_array(env, arr, true, CHECK); | |
3276 assert(a->is_typeArray(), "just checking"); | |
3277 BasicType value_type = (BasicType) vCode; | |
3278 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3279 JVM_END | |
3280 | |
3281 | |
3282 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3283 JVMWrapper("JVM_NewArray"); | |
3284 JvmtiVMObjectAllocEventCollector oam; | |
3285 oop element_mirror = JNIHandles::resolve(eltClass); | |
3286 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3287 return JNIHandles::make_local(env, result); | |
3288 JVM_END | |
3289 | |
3290 | |
3291 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3292 JVMWrapper("JVM_NewMultiArray"); | |
3293 JvmtiVMObjectAllocEventCollector oam; | |
3294 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3295 oop element_mirror = JNIHandles::resolve(eltClass); | |
3296 assert(dim_array->is_typeArray(), "just checking"); | |
3297 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3298 return JNIHandles::make_local(env, result); | |
3299 JVM_END | |
3300 | |
3301 | |
3302 // Networking library support //////////////////////////////////////////////////////////////////// | |
3303 | |
3304 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3305 JVMWrapper("JVM_InitializeSocketLibrary"); | |
3306 return hpi::initialize_socket_library(); | |
3307 JVM_END | |
3308 | |
3309 | |
3310 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3311 JVMWrapper("JVM_Socket"); | |
3312 return hpi::socket(domain, type, protocol); | |
3313 JVM_END | |
3314 | |
3315 | |
3316 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3317 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3318 //%note jvm_r6 | |
3319 return hpi::socket_close(fd); | |
3320 JVM_END | |
3321 | |
3322 | |
3323 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3324 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3325 //%note jvm_r6 | |
3326 return hpi::socket_shutdown(fd, howto); | |
3327 JVM_END | |
3328 | |
3329 | |
3330 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3331 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3332 //%note jvm_r6 | |
3333 return hpi::recv(fd, buf, nBytes, flags); | |
3334 JVM_END | |
3335 | |
3336 | |
3337 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3338 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3339 //%note jvm_r6 | |
3340 return hpi::send(fd, buf, nBytes, flags); | |
3341 JVM_END | |
3342 | |
3343 | |
3344 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3345 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3346 //%note jvm_r6 | |
3347 return hpi::timeout(fd, timeout); | |
3348 JVM_END | |
3349 | |
3350 | |
3351 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3352 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3353 //%note jvm_r6 | |
3354 return hpi::listen(fd, count); | |
3355 JVM_END | |
3356 | |
3357 | |
3358 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3359 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3360 //%note jvm_r6 | |
3361 return hpi::connect(fd, him, len); | |
3362 JVM_END | |
3363 | |
3364 | |
3365 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3366 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3367 //%note jvm_r6 | |
3368 return hpi::bind(fd, him, len); | |
3369 JVM_END | |
3370 | |
3371 | |
3372 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3373 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3374 //%note jvm_r6 | |
3375 return hpi::accept(fd, him, (int *)len); | |
3376 JVM_END | |
3377 | |
3378 | |
3379 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3380 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3381 //%note jvm_r6 | |
3382 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); | |
3383 JVM_END | |
3384 | |
3385 | |
3386 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3387 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3388 //%note jvm_r6 | |
3389 return hpi::get_sock_name(fd, him, len); | |
3390 JVM_END | |
3391 | |
3392 | |
3393 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3394 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3395 //%note jvm_r6 | |
3396 return hpi::sendto(fd, buf, len, flags, to, tolen); | |
3397 JVM_END | |
3398 | |
3399 | |
3400 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3401 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3402 //%note jvm_r6 | |
3403 return hpi::socket_available(fd, pbytes); | |
3404 JVM_END | |
3405 | |
3406 | |
3407 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3408 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3409 //%note jvm_r6 | |
3410 return hpi::get_sock_opt(fd, level, optname, optval, optlen); | |
3411 JVM_END | |
3412 | |
3413 | |
3414 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3415 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3416 //%note jvm_r6 | |
3417 return hpi::set_sock_opt(fd, level, optname, optval, optlen); | |
3418 JVM_END | |
3419 | |
3420 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) | |
3421 JVMWrapper("JVM_GetHostName"); | |
3422 return hpi::get_host_name(name, namelen); | |
3423 JVM_END | |
3424 | |
3425 #ifdef _WINDOWS | |
3426 | |
3427 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) | |
3428 JVMWrapper("JVM_GetHostByAddr"); | |
3429 return hpi::get_host_by_addr(name, len, type); | |
3430 JVM_END | |
3431 | |
3432 | |
3433 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) | |
3434 JVMWrapper("JVM_GetHostByName"); | |
3435 return hpi::get_host_by_name(name); | |
3436 JVM_END | |
3437 | |
3438 | |
3439 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) | |
3440 JVMWrapper("JVM_GetProtoByName"); | |
3441 return hpi::get_proto_by_name(name); | |
3442 JVM_END | |
3443 | |
3444 #endif | |
3445 | |
3446 // Library support /////////////////////////////////////////////////////////////////////////// | |
3447 | |
3448 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3449 //%note jvm_ct | |
3450 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3451 char ebuf[1024]; | |
3452 void *load_result; | |
3453 { | |
3454 ThreadToNativeFromVM ttnfvm(thread); | |
3455 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); | |
3456 } | |
3457 if (load_result == NULL) { | |
3458 char msg[1024]; | |
3459 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3460 // Since 'ebuf' may contain a string encoded using | |
3461 // platform encoding scheme, we need to pass | |
3462 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3463 // as the last argument. See bug 6367357. | |
3464 Handle h_exception = | |
3465 Exceptions::new_exception(thread, | |
3466 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3467 msg, Exceptions::unsafe_to_utf8); | |
3468 | |
3469 THROW_HANDLE_0(h_exception); | |
3470 } | |
3471 return load_result; | |
3472 JVM_END | |
3473 | |
3474 | |
3475 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3476 JVMWrapper("JVM_UnloadLibrary"); | |
3477 hpi::dll_unload(handle); | |
3478 JVM_END | |
3479 | |
3480 | |
3481 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3482 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
3483 return hpi::dll_lookup(handle, name); | |
3484 JVM_END | |
3485 | |
3486 // Floating point support //////////////////////////////////////////////////////////////////// | |
3487 | |
3488 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3489 JVMWrapper("JVM_IsNaN"); | |
3490 return g_isnan(a); | |
3491 JVM_END | |
3492 | |
3493 | |
3494 | |
3495 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3496 | |
3497 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3498 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3499 return Threads::is_supported_jni_version_including_1_1(version); | |
3500 JVM_END | |
3501 | |
3502 | |
3503 // String support /////////////////////////////////////////////////////////////////////////// | |
3504 | |
3505 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3506 JVMWrapper("JVM_InternString"); | |
3507 JvmtiVMObjectAllocEventCollector oam; | |
3508 if (str == NULL) return NULL; | |
3509 oop string = JNIHandles::resolve_non_null(str); | |
3510 oop result = StringTable::intern(string, CHECK_NULL); | |
3511 return (jstring) JNIHandles::make_local(env, result); | |
3512 JVM_END | |
3513 | |
3514 | |
3515 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3516 | |
3517 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3518 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3519 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3520 // that only works with java threads. | |
3521 | |
3522 | |
3523 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3524 VM_Exit::block_if_vm_exited(); | |
3525 JVMWrapper("JVM_RawMonitorCreate"); | |
3526 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3527 } | |
3528 | |
3529 | |
3530 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3531 VM_Exit::block_if_vm_exited(); | |
3532 JVMWrapper("JVM_RawMonitorDestroy"); | |
3533 delete ((Mutex*) mon); | |
3534 } | |
3535 | |
3536 | |
3537 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3538 VM_Exit::block_if_vm_exited(); | |
3539 JVMWrapper("JVM_RawMonitorEnter"); | |
3540 ((Mutex*) mon)->jvm_raw_lock(); | |
3541 return 0; | |
3542 } | |
3543 | |
3544 | |
3545 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3546 VM_Exit::block_if_vm_exited(); | |
3547 JVMWrapper("JVM_RawMonitorExit"); | |
3548 ((Mutex*) mon)->jvm_raw_unlock(); | |
3549 } | |
3550 | |
3551 | |
3552 // Support for Serialization | |
3553 | |
3554 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3555 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3556 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3557 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3558 | |
3559 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3560 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3561 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3562 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3563 | |
3564 | |
3565 void initialize_converter_functions() { | |
3566 if (JDK_Version::is_gte_jdk14x_version()) { | |
3567 // These functions only exist for compatibility with 1.3.1 and earlier | |
3568 return; | |
3569 } | |
3570 | |
3571 // called from universe_post_init() | |
3572 assert( | |
3573 int_bits_to_float_fn == NULL && | |
3574 long_bits_to_double_fn == NULL && | |
3575 float_to_int_bits_fn == NULL && | |
3576 double_to_long_bits_fn == NULL , | |
3577 "initialization done twice" | |
3578 ); | |
3579 // initialize | |
3580 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3581 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3582 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3583 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3584 // verify | |
3585 assert( | |
3586 int_bits_to_float_fn != NULL && | |
3587 long_bits_to_double_fn != NULL && | |
3588 float_to_int_bits_fn != NULL && | |
3589 double_to_long_bits_fn != NULL , | |
3590 "initialization failed" | |
3591 ); | |
3592 } | |
3593 | |
3594 | |
3595 // Serialization | |
3596 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3597 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3598 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3599 | |
3600 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3601 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3602 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3603 oop o = JNIHandles::resolve(obj); | |
3604 | |
3605 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3606 THROW(vmSymbols::java_lang_NullPointerException()); | |
3607 } | |
3608 | |
3609 jsize nfids = fids->length(); | |
3610 if (nfids == 0) return; | |
3611 | |
3612 if (tcodes->length() < nfids) { | |
3613 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3614 } | |
3615 | |
3616 jsize off = 0; | |
3617 /* loop through fields, setting values */ | |
3618 for (jsize i = 0; i < nfids; i++) { | |
3619 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3620 int field_offset; | |
3621 if (fid != NULL) { | |
3622 // NULL is a legal value for fid, but retrieving the field offset | |
3623 // trigger assertion in that case | |
3624 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3625 } | |
3626 | |
3627 switch (tcodes->char_at(i)) { | |
3628 case 'Z': | |
3629 if (fid != NULL) { | |
3630 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3631 o->bool_field_put(field_offset, val); | |
3632 } | |
3633 off++; | |
3634 break; | |
3635 | |
3636 case 'B': | |
3637 if (fid != NULL) { | |
3638 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3639 } | |
3640 off++; | |
3641 break; | |
3642 | |
3643 case 'C': | |
3644 if (fid != NULL) { | |
3645 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3646 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3647 o->char_field_put(field_offset, val); | |
3648 } | |
3649 off += 2; | |
3650 break; | |
3651 | |
3652 case 'S': | |
3653 if (fid != NULL) { | |
3654 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3655 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3656 o->short_field_put(field_offset, val); | |
3657 } | |
3658 off += 2; | |
3659 break; | |
3660 | |
3661 case 'I': | |
3662 if (fid != NULL) { | |
3663 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3664 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3665 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3666 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3667 o->int_field_put(field_offset, ival); | |
3668 } | |
3669 off += 4; | |
3670 break; | |
3671 | |
3672 case 'F': | |
3673 if (fid != NULL) { | |
3674 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3675 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3676 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3677 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3678 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3679 o->float_field_put(field_offset, fval); | |
3680 } | |
3681 off += 4; | |
3682 break; | |
3683 | |
3684 case 'J': | |
3685 if (fid != NULL) { | |
3686 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3687 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3688 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3689 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3690 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3691 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3692 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3693 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3694 o->long_field_put(field_offset, lval); | |
3695 } | |
3696 off += 8; | |
3697 break; | |
3698 | |
3699 case 'D': | |
3700 if (fid != NULL) { | |
3701 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3702 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3703 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3704 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3705 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3706 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3707 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3708 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3709 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3710 o->double_field_put(field_offset, dval); | |
3711 } | |
3712 off += 8; | |
3713 break; | |
3714 | |
3715 default: | |
3716 // Illegal typecode | |
3717 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3718 } | |
3719 } | |
3720 JVM_END | |
3721 | |
3722 | |
3723 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3724 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3725 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3726 | |
3727 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3728 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3729 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3730 oop o = JNIHandles::resolve(obj); | |
3731 | |
3732 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3733 THROW(vmSymbols::java_lang_NullPointerException()); | |
3734 } | |
3735 | |
3736 jsize nfids = fids->length(); | |
3737 if (nfids == 0) return; | |
3738 | |
3739 if (tcodes->length() < nfids) { | |
3740 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3741 } | |
3742 | |
3743 /* loop through fields, fetching values */ | |
3744 jsize off = 0; | |
3745 for (jsize i = 0; i < nfids; i++) { | |
3746 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3747 if (fid == NULL) { | |
3748 THROW(vmSymbols::java_lang_NullPointerException()); | |
3749 } | |
3750 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3751 | |
3752 switch (tcodes->char_at(i)) { | |
3753 case 'Z': | |
3754 { | |
3755 jboolean val = o->bool_field(field_offset); | |
3756 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3757 } | |
3758 break; | |
3759 | |
3760 case 'B': | |
3761 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3762 break; | |
3763 | |
3764 case 'C': | |
3765 { | |
3766 jchar val = o->char_field(field_offset); | |
3767 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3768 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3769 } | |
3770 break; | |
3771 | |
3772 case 'S': | |
3773 { | |
3774 jshort val = o->short_field(field_offset); | |
3775 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3776 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3777 } | |
3778 break; | |
3779 | |
3780 case 'I': | |
3781 { | |
3782 jint val = o->int_field(field_offset); | |
3783 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3784 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3785 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3786 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3787 } | |
3788 break; | |
3789 | |
3790 case 'F': | |
3791 { | |
3792 jfloat fval = o->float_field(field_offset); | |
3793 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3794 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3795 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3796 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3797 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3798 } | |
3799 break; | |
3800 | |
3801 case 'J': | |
3802 { | |
3803 jlong val = o->long_field(field_offset); | |
3804 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3805 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3806 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3807 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3808 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3809 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3810 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3811 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3812 } | |
3813 break; | |
3814 | |
3815 case 'D': | |
3816 { | |
3817 jdouble dval = o->double_field(field_offset); | |
3818 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3819 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
3820 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
3821 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
3822 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
3823 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
3824 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
3825 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
3826 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
3827 } | |
3828 break; | |
3829 | |
3830 default: | |
3831 // Illegal typecode | |
3832 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3833 } | |
3834 } | |
3835 JVM_END | |
3836 | |
3837 | |
3838 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3839 | |
3840 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { | |
3841 // Security Note: | |
3842 // The Java level wrapper will perform the necessary security check allowing | |
3843 // us to pass the NULL as the initiating class loader. | |
3844 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
3845 KlassHandle klass_handle(THREAD, klass); | |
3846 // Check if we should initialize the class | |
3847 if (init && klass_handle->oop_is_instance()) { | |
3848 klass_handle->initialize(CHECK_NULL); | |
3849 } | |
3850 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
3851 } | |
3852 | |
3853 | |
3854 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
3855 | |
3856 #ifndef PRODUCT | |
3857 | |
3858 extern "C" { | |
3859 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
3860 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
3861 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
3862 } | |
3863 | |
3864 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
3865 JVMWrapper("JVM_AccessBoolVMFlag"); | |
3866 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
3867 JVM_END | |
3868 | |
3869 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
3870 JVMWrapper("JVM_AccessVMIntFlag"); | |
3871 intx v; | |
3872 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
3873 *value = (jint)v; | |
3874 return result; | |
3875 JVM_END | |
3876 | |
3877 | |
3878 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
3879 JVMWrapper("JVM_VMBreakPoint"); | |
3880 oop the_obj = JNIHandles::resolve(obj); | |
3881 BREAKPOINT; | |
3882 JVM_END | |
3883 | |
3884 | |
3885 #endif | |
3886 | |
3887 | |
3888 //--------------------------------------------------------------------------- | |
3889 // | |
3890 // Support for old native code-based reflection (pre-JDK 1.4) | |
3891 // Disabled by default in the product build. | |
3892 // | |
3893 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION | |
3894 // | |
3895 //--------------------------------------------------------------------------- | |
3896 | |
3897 #ifdef SUPPORT_OLD_REFLECTION | |
3898 | |
3899 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) | |
3900 JVMWrapper("JVM_GetClassFields"); | |
3901 JvmtiVMObjectAllocEventCollector oam; | |
3902 oop mirror = JNIHandles::resolve_non_null(cls); | |
3903 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); | |
3904 return (jobjectArray) JNIHandles::make_local(env, result); | |
3905 JVM_END | |
3906 | |
3907 | |
3908 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) | |
3909 JVMWrapper("JVM_GetClassMethods"); | |
3910 JvmtiVMObjectAllocEventCollector oam; | |
3911 oop mirror = JNIHandles::resolve_non_null(cls); | |
3912 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); | |
3913 //%note jvm_r4 | |
3914 return (jobjectArray) JNIHandles::make_local(env, result); | |
3915 JVM_END | |
3916 | |
3917 | |
3918 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) | |
3919 JVMWrapper("JVM_GetClassConstructors"); | |
3920 JvmtiVMObjectAllocEventCollector oam; | |
3921 oop mirror = JNIHandles::resolve_non_null(cls); | |
3922 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); | |
3923 //%note jvm_r4 | |
3924 return (jobjectArray) JNIHandles::make_local(env, result); | |
3925 JVM_END | |
3926 | |
3927 | |
3928 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) | |
3929 JVMWrapper("JVM_GetClassField"); | |
3930 JvmtiVMObjectAllocEventCollector oam; | |
3931 if (name == NULL) return NULL; | |
3932 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
3933 | |
3934 const char* cstr = java_lang_String::as_utf8_string(str()); | |
3935 symbolHandle field_name = | |
3936 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
3937 if (field_name.is_null()) { | |
3938 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
3939 } | |
3940 | |
3941 oop mirror = JNIHandles::resolve_non_null(cls); | |
3942 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); | |
3943 if (result == NULL) { | |
3944 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
3945 } | |
3946 return JNIHandles::make_local(env, result); | |
3947 JVM_END | |
3948 | |
3949 | |
3950 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) | |
3951 JVMWrapper("JVM_GetClassMethod"); | |
3952 JvmtiVMObjectAllocEventCollector oam; | |
3953 if (name == NULL) { | |
3954 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3955 } | |
3956 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
3957 | |
3958 const char* cstr = java_lang_String::as_utf8_string(str()); | |
3959 symbolHandle method_name = | |
3960 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
3961 if (method_name.is_null()) { | |
3962 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3963 } | |
3964 | |
3965 oop mirror = JNIHandles::resolve_non_null(cls); | |
3966 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
3967 oop result = Reflection::reflect_method(mirror, method_name, tarray, | |
3968 which, CHECK_NULL); | |
3969 if (result == NULL) { | |
3970 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3971 } | |
3972 return JNIHandles::make_local(env, result); | |
3973 JVM_END | |
3974 | |
3975 | |
3976 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) | |
3977 JVMWrapper("JVM_GetClassConstructor"); | |
3978 JvmtiVMObjectAllocEventCollector oam; | |
3979 oop mirror = JNIHandles::resolve_non_null(cls); | |
3980 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
3981 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); | |
3982 if (result == NULL) { | |
3983 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3984 } | |
3985 return (jobject) JNIHandles::make_local(env, result); | |
3986 JVM_END | |
3987 | |
3988 | |
3989 // Instantiation /////////////////////////////////////////////////////////////////////////////// | |
3990 | |
3991 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) | |
3992 JVMWrapper("JVM_NewInstance"); | |
3993 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); | |
3994 | |
3995 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); | |
3996 if (resolved_constructor == NULL) { | |
3997 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
3998 // The java.lang.Class object caches a resolved constructor if all the checks | |
3999 // below were done successfully and a constructor was found. | |
4000 | |
4001 // Do class based checks | |
4002 if (java_lang_Class::is_primitive(mirror())) { | |
4003 const char* msg = ""; | |
4004 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; | |
4005 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; | |
4006 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; | |
4007 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; | |
4008 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; | |
4009 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; | |
4010 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; | |
4011 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; | |
4012 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); | |
4013 } | |
4014 | |
4015 // Check whether we are allowed to instantiate this class | |
4016 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here | |
4017 instanceKlassHandle klass(THREAD, k); | |
4018 // Make sure class is initialized (also so all methods are rewritten) | |
4019 klass->initialize(CHECK_NULL); | |
4020 | |
4021 // Lookup default constructor | |
4022 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); | |
4023 if (resolved_constructor == NULL) { | |
4024 ResourceMark rm(THREAD); | |
4025 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); | |
4026 } | |
4027 | |
4028 // Cache result in java.lang.Class object. Does not have to be MT safe. | |
4029 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); | |
4030 } | |
4031 | |
4032 assert(resolved_constructor != NULL, "sanity check"); | |
4033 methodHandle constructor = methodHandle(THREAD, resolved_constructor); | |
4034 | |
4035 // We have an initialized instanceKlass with a default constructor | |
4036 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
4037 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); | |
4038 | |
4039 // Do security check | |
4040 klassOop caller_klass = NULL; | |
4041 if (UsePrivilegedStack) { | |
4042 caller_klass = thread->security_get_caller_class(2); | |
4043 | |
4044 if (!Reflection::verify_class_access(caller_klass, klass(), false) || | |
4045 !Reflection::verify_field_access(caller_klass, | |
4046 klass(), | |
4047 klass(), | |
4048 constructor->access_flags(), | |
4049 false, | |
4050 true)) { | |
4051 ResourceMark rm(THREAD); | |
4052 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); | |
4053 } | |
4054 } | |
4055 | |
4056 // Allocate object and call constructor | |
4057 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); | |
4058 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); | |
4059 | |
4060 jobject res = JNIHandles::make_local(env, receiver()); | |
4061 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4062 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); | |
4063 } | |
4064 return res; | |
4065 JVM_END | |
4066 | |
4067 | |
4068 // Field //////////////////////////////////////////////////////////////////////////////////////////// | |
4069 | |
4070 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) | |
4071 JVMWrapper("JVM_GetField"); | |
4072 JvmtiVMObjectAllocEventCollector oam; | |
4073 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4074 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4075 fieldDescriptor fd; | |
4076 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); | |
4077 jvalue value; | |
4078 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4079 oop box = Reflection::box(&value, type, CHECK_NULL); | |
4080 return JNIHandles::make_local(env, box); | |
4081 JVM_END | |
4082 | |
4083 | |
4084 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) | |
4085 JVMWrapper("JVM_GetPrimitiveField"); | |
4086 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4087 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4088 fieldDescriptor fd; | |
4089 jvalue value; | |
4090 value.j = 0; | |
4091 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); | |
4092 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4093 BasicType wide_type = (BasicType) wCode; | |
4094 if (type != wide_type) { | |
4095 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
4096 } | |
4097 return value; | |
4098 JVM_END // should really be JVM_END, but that doesn't work for union types! | |
4099 | |
4100 | |
4101 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) | |
4102 JVMWrapper("JVM_SetField"); | |
4103 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4104 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4105 oop box = JNIHandles::resolve(val); | |
4106 fieldDescriptor fd; | |
4107 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4108 BasicType field_type = fd.field_type(); | |
4109 jvalue value; | |
4110 BasicType value_type; | |
4111 if (field_type == T_OBJECT || field_type == T_ARRAY) { | |
4112 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
4113 value_type = Reflection::unbox_for_regular_object(box, &value); | |
4114 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); | |
4115 } else { | |
4116 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
4117 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); | |
4118 } | |
4119 JVM_END | |
4120 | |
4121 | |
4122 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) | |
4123 JVMWrapper("JVM_SetPrimitiveField"); | |
4124 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4125 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4126 fieldDescriptor fd; | |
4127 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4128 BasicType value_type = (BasicType) vCode; | |
4129 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); | |
4130 JVM_END | |
4131 | |
4132 | |
4133 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4134 | |
4135 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4136 JVMWrapper("JVM_InvokeMethod"); | |
4137 Handle method_handle; | |
4138 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4139 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4140 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4141 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4142 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4143 jobject res = JNIHandles::make_local(env, result); | |
4144 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4145 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4146 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4147 if (java_lang_Class::is_primitive(ret_type)) { | |
4148 // Only for primitive type vm allocates memory for java object. | |
4149 // See box() method. | |
4150 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4151 } | |
4152 } | |
4153 return res; | |
4154 } else { | |
4155 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4156 } | |
4157 JVM_END | |
4158 | |
4159 | |
4160 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4161 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4162 oop constructor_mirror = JNIHandles::resolve(c); | |
4163 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4164 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4165 jobject res = JNIHandles::make_local(env, result); | |
4166 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4167 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4168 } | |
4169 return res; | |
4170 JVM_END | |
4171 | |
4172 #endif /* SUPPORT_OLD_REFLECTION */ | |
4173 | |
4174 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4175 | |
4176 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4177 JVMWrapper("JVM_SupportsCX8"); | |
4178 return VM_Version::supports_cx8(); | |
4179 JVM_END | |
4180 | |
4181 | |
4182 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4183 JVMWrapper("JVM_CX8Field"); | |
4184 jlong res; | |
4185 oop o = JNIHandles::resolve(obj); | |
4186 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4187 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4188 | |
4189 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4190 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4191 | |
4192 return res == oldVal; | |
4193 JVM_END | |
4194 | |
116
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4195 // DTrace /////////////////////////////////////////////////////////////////// |
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4196 |
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4197 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4198 JVMWrapper("JVM_DTraceGetVersion"); |
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4199 return (jint)JVM_TRACING_DTRACE_VERSION; |
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|
4200 JVM_END |
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|
4201 |
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|
4202 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4203 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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|
4204 JVM_DTraceProvider* providers)) |
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|
4205 JVMWrapper("JVM_DTraceActivate"); |
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|
4206 return DTraceJSDT::activate( |
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|
4207 version, module_name, providers_count, providers, CHECK_0); |
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|
4208 JVM_END |
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|
4209 |
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|
4210 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4211 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4212 return DTraceJSDT::is_probe_enabled(method); |
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4213 JVM_END |
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4214 |
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4215 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4216 JVMWrapper("JVM_DTraceDispose"); |
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4217 DTraceJSDT::dispose(handle); |
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4218 JVM_END |
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4219 |
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4220 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4221 JVMWrapper("JVM_DTraceIsSupported"); |
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4222 return DTraceJSDT::is_supported(); |
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4223 JVM_END |
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4224 |
0 | 4225 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4226 // jvmti agent threads, and JNI attaching threads are skipped) | |
4227 // See CR 6404306 regarding JNI attaching threads | |
4228 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4229 ResourceMark rm(THREAD); | |
4230 ThreadsListEnumerator tle(THREAD, false, false); | |
4231 JvmtiVMObjectAllocEventCollector oam; | |
4232 | |
4233 int num_threads = tle.num_threads(); | |
4234 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL); | |
4235 objArrayHandle threads_ah(THREAD, r); | |
4236 | |
4237 for (int i = 0; i < num_threads; i++) { | |
4238 Handle h = tle.get_threadObj(i); | |
4239 threads_ah->obj_at_put(i, h()); | |
4240 } | |
4241 | |
4242 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4243 JVM_END | |
4244 | |
4245 | |
4246 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4247 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4248 // the corresponding entry in the given threads array | |
4249 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4250 JVMWrapper("JVM_DumpThreads"); | |
4251 JvmtiVMObjectAllocEventCollector oam; | |
4252 | |
4253 // Check if threads is null | |
4254 if (threads == NULL) { | |
4255 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4256 } | |
4257 | |
4258 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4259 objArrayHandle ah(THREAD, a); | |
4260 int num_threads = ah->length(); | |
4261 // check if threads is non-empty array | |
4262 if (num_threads == 0) { | |
4263 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4264 } | |
4265 | |
4266 // check if threads is not an array of objects of Thread class | |
4267 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
4268 if (k != SystemDictionary::thread_klass()) { | |
4269 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4270 } | |
4271 | |
4272 ResourceMark rm(THREAD); | |
4273 | |
4274 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4275 for (int i = 0; i < num_threads; i++) { | |
4276 oop thread_obj = ah->obj_at(i); | |
4277 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4278 thread_handle_array->append(h); | |
4279 } | |
4280 | |
4281 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4282 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4283 | |
4284 JVM_END | |
4285 | |
4286 // JVM monitoring and management support | |
4287 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4288 return Management::get_jmm_interface(version); | |
4289 JVM_END | |
4290 | |
4291 // com.sun.tools.attach.VirtualMachine agent properties support | |
4292 // | |
4293 // Initialize the agent properties with the properties maintained in the VM | |
4294 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4295 JVMWrapper("JVM_InitAgentProperties"); | |
4296 ResourceMark rm; | |
4297 | |
4298 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4299 | |
4300 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4301 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4302 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4303 return properties; | |
4304 JVM_END | |
4305 | |
4306 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4307 { | |
4308 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4309 JvmtiVMObjectAllocEventCollector oam; | |
4310 | |
4311 if (ofClass == NULL) { | |
4312 return NULL; | |
4313 } | |
4314 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4315 // Special handling for primitive objects | |
4316 if (java_lang_Class::is_primitive(mirror())) { | |
4317 return NULL; | |
4318 } | |
4319 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4320 if (!Klass::cast(k)->oop_is_instance()) { | |
4321 return NULL; | |
4322 } | |
4323 instanceKlassHandle ik_h(THREAD, k); | |
4324 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4325 if (encl_method_class_idx == 0) { | |
4326 return NULL; | |
4327 } | |
4328 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL); | |
4329 objArrayHandle dest(THREAD, dest_o); | |
4330 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4331 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4332 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4333 if (encl_method_method_idx != 0) { | |
4334 symbolOop sym_o = ik_h->constants()->symbol_at( | |
4335 extract_low_short_from_int( | |
4336 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4337 symbolHandle sym(THREAD, sym_o); | |
4338 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4339 dest->obj_at_put(1, str()); | |
4340 sym_o = ik_h->constants()->symbol_at( | |
4341 extract_high_short_from_int( | |
4342 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4343 sym = symbolHandle(THREAD, sym_o); | |
4344 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4345 dest->obj_at_put(2, str()); | |
4346 } | |
4347 return (jobjectArray) JNIHandles::make_local(dest()); | |
4348 } | |
4349 JVM_END | |
4350 | |
4351 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4352 jint javaThreadState)) | |
4353 { | |
4354 // If new thread states are added in future JDK and VM versions, | |
4355 // this should check if the JDK version is compatible with thread | |
4356 // states supported by the VM. Return NULL if not compatible. | |
4357 // | |
4358 // This function must map the VM java_lang_Thread::ThreadStatus | |
4359 // to the Java thread state that the JDK supports. | |
4360 // | |
4361 | |
4362 typeArrayHandle values_h; | |
4363 switch (javaThreadState) { | |
4364 case JAVA_THREAD_STATE_NEW : { | |
4365 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4366 values_h = typeArrayHandle(THREAD, r); | |
4367 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4368 break; | |
4369 } | |
4370 case JAVA_THREAD_STATE_RUNNABLE : { | |
4371 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4372 values_h = typeArrayHandle(THREAD, r); | |
4373 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4374 break; | |
4375 } | |
4376 case JAVA_THREAD_STATE_BLOCKED : { | |
4377 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4378 values_h = typeArrayHandle(THREAD, r); | |
4379 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4380 break; | |
4381 } | |
4382 case JAVA_THREAD_STATE_WAITING : { | |
4383 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4384 values_h = typeArrayHandle(THREAD, r); | |
4385 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4386 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4387 break; | |
4388 } | |
4389 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4390 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4391 values_h = typeArrayHandle(THREAD, r); | |
4392 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4393 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4394 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4395 break; | |
4396 } | |
4397 case JAVA_THREAD_STATE_TERMINATED : { | |
4398 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4399 values_h = typeArrayHandle(THREAD, r); | |
4400 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4401 break; | |
4402 } | |
4403 default: | |
4404 // Unknown state - probably incompatible JDK version | |
4405 return NULL; | |
4406 } | |
4407 | |
4408 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4409 } | |
4410 JVM_END | |
4411 | |
4412 | |
4413 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4414 jint javaThreadState, | |
4415 jintArray values)) | |
4416 { | |
4417 // If new thread states are added in future JDK and VM versions, | |
4418 // this should check if the JDK version is compatible with thread | |
4419 // states supported by the VM. Return NULL if not compatible. | |
4420 // | |
4421 // This function must map the VM java_lang_Thread::ThreadStatus | |
4422 // to the Java thread state that the JDK supports. | |
4423 // | |
4424 | |
4425 ResourceMark rm; | |
4426 | |
4427 // Check if threads is null | |
4428 if (values == NULL) { | |
4429 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4430 } | |
4431 | |
4432 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4433 typeArrayHandle values_h(THREAD, v); | |
4434 | |
4435 objArrayHandle names_h; | |
4436 switch (javaThreadState) { | |
4437 case JAVA_THREAD_STATE_NEW : { | |
4438 assert(values_h->length() == 1 && | |
4439 values_h->int_at(0) == java_lang_Thread::NEW, | |
4440 "Invalid threadStatus value"); | |
4441 | |
4442 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4443 1, /* only 1 substate */ | |
4444 CHECK_NULL); | |
4445 names_h = objArrayHandle(THREAD, r); | |
4446 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4447 names_h->obj_at_put(0, name()); | |
4448 break; | |
4449 } | |
4450 case JAVA_THREAD_STATE_RUNNABLE : { | |
4451 assert(values_h->length() == 1 && | |
4452 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4453 "Invalid threadStatus value"); | |
4454 | |
4455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4456 1, /* only 1 substate */ | |
4457 CHECK_NULL); | |
4458 names_h = objArrayHandle(THREAD, r); | |
4459 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4460 names_h->obj_at_put(0, name()); | |
4461 break; | |
4462 } | |
4463 case JAVA_THREAD_STATE_BLOCKED : { | |
4464 assert(values_h->length() == 1 && | |
4465 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4466 "Invalid threadStatus value"); | |
4467 | |
4468 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4469 1, /* only 1 substate */ | |
4470 CHECK_NULL); | |
4471 names_h = objArrayHandle(THREAD, r); | |
4472 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4473 names_h->obj_at_put(0, name()); | |
4474 break; | |
4475 } | |
4476 case JAVA_THREAD_STATE_WAITING : { | |
4477 assert(values_h->length() == 2 && | |
4478 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4479 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4480 "Invalid threadStatus value"); | |
4481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4482 2, /* number of substates */ | |
4483 CHECK_NULL); | |
4484 names_h = objArrayHandle(THREAD, r); | |
4485 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4486 CHECK_NULL); | |
4487 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4488 CHECK_NULL); | |
4489 names_h->obj_at_put(0, name0()); | |
4490 names_h->obj_at_put(1, name1()); | |
4491 break; | |
4492 } | |
4493 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4494 assert(values_h->length() == 3 && | |
4495 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4496 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4497 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4498 "Invalid threadStatus value"); | |
4499 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4500 3, /* number of substates */ | |
4501 CHECK_NULL); | |
4502 names_h = objArrayHandle(THREAD, r); | |
4503 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4504 CHECK_NULL); | |
4505 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4506 CHECK_NULL); | |
4507 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4508 CHECK_NULL); | |
4509 names_h->obj_at_put(0, name0()); | |
4510 names_h->obj_at_put(1, name1()); | |
4511 names_h->obj_at_put(2, name2()); | |
4512 break; | |
4513 } | |
4514 case JAVA_THREAD_STATE_TERMINATED : { | |
4515 assert(values_h->length() == 1 && | |
4516 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4517 "Invalid threadStatus value"); | |
4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4519 1, /* only 1 substate */ | |
4520 CHECK_NULL); | |
4521 names_h = objArrayHandle(THREAD, r); | |
4522 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4523 names_h->obj_at_put(0, name()); | |
4524 break; | |
4525 } | |
4526 default: | |
4527 // Unknown state - probably incompatible JDK version | |
4528 return NULL; | |
4529 } | |
4530 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4531 } | |
4532 JVM_END | |
4533 | |
4534 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4535 { | |
4536 memset(info, 0, sizeof(info_size)); | |
4537 | |
4538 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4539 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4540 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4541 | |
4542 // when we add a new capability in the jvm_version_info struct, we should also | |
4543 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4544 // counter defined in runtimeService.cpp. | |
4545 info->is_attachable = AttachListener::is_attach_supported(); | |
4546 #ifdef KERNEL | |
4547 info->is_kernel_jvm = 1; // true; | |
4548 #else // KERNEL | |
4549 info->is_kernel_jvm = 0; // false; | |
4550 #endif // KERNEL | |
4551 } | |
4552 JVM_END | |
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4553 |