1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
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;
381 {
382 MutexLocker x(Heap_lock);
383 n = ch->capacity() - ch->used();
384 }
385 return convert_size_t_to_jlong(n);
386 JVM_END
387
388
389 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
390 JVMWrapper("JVM_MaxMemory");
391 size_t n = Universe::heap()->max_capacity();
392 return convert_size_t_to_jlong(n);
393 JVM_END
394
395
396 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
397 JVMWrapper("JVM_ActiveProcessorCount");
398 return os::active_processor_count();
399 JVM_END
400
401
402
403 // java.lang.Throwable //////////////////////////////////////////////////////
404
405
406 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
407 JVMWrapper("JVM_FillInStackTrace");
408 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
409 java_lang_Throwable::fill_in_stack_trace(exception);
410 JVM_END
411
412
413 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
414 JVMWrapper("JVM_PrintStackTrace");
415 // Note: This is no longer used in Merlin, but we still support it for compatibility.
416 oop exception = JNIHandles::resolve_non_null(receiver);
417 oop stream = JNIHandles::resolve_non_null(printable);
418 java_lang_Throwable::print_stack_trace(exception, stream);
419 JVM_END
420
421
422 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
423 JVMWrapper("JVM_GetStackTraceDepth");
424 oop exception = JNIHandles::resolve(throwable);
425 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
426 JVM_END
427
428
429 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
430 JVMWrapper("JVM_GetStackTraceElement");
431 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
432 oop exception = JNIHandles::resolve(throwable);
433 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
434 return JNIHandles::make_local(env, element);
435 JVM_END
436
437
438 // java.lang.Object ///////////////////////////////////////////////
439
440
441 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
442 JVMWrapper("JVM_IHashCode");
443 // as implemented in the classic virtual machine; return 0 if object is NULL
444 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
445 JVM_END
446
447
448 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
449 JVMWrapper("JVM_MonitorWait");
450 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
451 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
452 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
453 if (JvmtiExport::should_post_monitor_wait()) {
454 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
455 }
456 ObjectSynchronizer::wait(obj, ms, CHECK);
457 JVM_END
458
459
460 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
461 JVMWrapper("JVM_MonitorNotify");
462 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
463 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
464 ObjectSynchronizer::notify(obj, CHECK);
465 JVM_END
466
467
468 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
469 JVMWrapper("JVM_MonitorNotifyAll");
470 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
471 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
472 ObjectSynchronizer::notifyall(obj, CHECK);
473 JVM_END
474
475
476 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
477 JVMWrapper("JVM_Clone");
478 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
479 const KlassHandle klass (THREAD, obj->klass());
480 JvmtiVMObjectAllocEventCollector oam;
481
482 #ifdef ASSERT
483 // Just checking that the cloneable flag is set correct
484 if (obj->is_javaArray()) {
485 guarantee(klass->is_cloneable(), "all arrays are cloneable");
486 } else {
487 guarantee(obj->is_instance(), "should be instanceOop");
488 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass());
489 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
490 }
491 #endif
492
493 // Check if class of obj supports the Cloneable interface.
494 // All arrays are considered to be cloneable (See JLS 20.1.5)
495 if (!klass->is_cloneable()) {
496 ResourceMark rm(THREAD);
497 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
498 }
499
500 // Make shallow object copy
501 const int size = obj->size();
502 oop new_obj = NULL;
503 if (obj->is_javaArray()) {
504 const int length = ((arrayOop)obj())->length();
505 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
506 } else {
507 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
508 }
509 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
510 // is modifying a reference field in the clonee, a non-oop-atomic copy might
511 // be suspended in the middle of copying the pointer and end up with parts
512 // of two different pointers in the field. Subsequent dereferences will crash.
513 // 4846409: an oop-copy of objects with long or double fields or arrays of same
514 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
515 // of oops. We know objects are aligned on a minimum of an jlong boundary.
516 // The same is true of StubRoutines::object_copy and the various oop_copy
517 // variants, and of the code generated by the inline_native_clone intrinsic.
518 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
519 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
520 (size_t)align_object_size(size) / HeapWordsPerLong);
521 // Clear the header
522 new_obj->init_mark();
523
524 // Store check (mark entire object and let gc sort it out)
525 BarrierSet* bs = Universe::heap()->barrier_set();
526 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
527 bs->write_region(MemRegion((HeapWord*)new_obj, size));
528
529 // Caution: this involves a java upcall, so the clone should be
530 // "gc-robust" by this stage.
531 if (klass->has_finalizer()) {
532 assert(obj->is_instance(), "should be instanceOop");
533 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
534 }
535
536 return JNIHandles::make_local(env, oop(new_obj));
537 JVM_END
538
539 // java.lang.Compiler ////////////////////////////////////////////////////
540
541 // The initial cuts of the HotSpot VM will not support JITs, and all existing
542 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
543 // functions are all silently ignored unless JVM warnings are printed.
544
545 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
546 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
547 JVM_END
548
549
550 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
551 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
552 return JNI_FALSE;
553 JVM_END
554
555
556 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
557 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
558 return JNI_FALSE;
559 JVM_END
560
561
562 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
563 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
564 return JNI_FALSE;
565 JVM_END
566
567
568 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
569 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
570 return NULL;
571 JVM_END
572
573
574 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
575 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
576 JVM_END
577
578
579 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
580 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
581 JVM_END
582
583
584
585 // Error message support //////////////////////////////////////////////////////
586
587 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
588 JVMWrapper("JVM_GetLastErrorString");
589 return hpi::lasterror(buf, len);
590 JVM_END
591
592
593 // java.io.File ///////////////////////////////////////////////////////////////
594
595 JVM_LEAF(char*, JVM_NativePath(char* path))
596 JVMWrapper2("JVM_NativePath (%s)", path);
597 return hpi::native_path(path);
598 JVM_END
599
600
601 // Misc. class handling ///////////////////////////////////////////////////////////
602
603
604 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
605 JVMWrapper("JVM_GetCallerClass");
606 klassOop k = thread->security_get_caller_class(depth);
607 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
608 JVM_END
609
610
611 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
612 JVMWrapper("JVM_FindPrimitiveClass");
613 oop mirror = NULL;
614 BasicType t = name2type(utf);
615 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
616 mirror = Universe::java_mirror(t);
617 }
618 if (mirror == NULL) {
619 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
620 } else {
621 return (jclass) JNIHandles::make_local(env, mirror);
622 }
623 JVM_END
624
625
626 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
627 JVMWrapper("JVM_ResolveClass");
628 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
629 JVM_END
630
631 // Common implementation for JVM_FindClassFromBootLoader and
632 // JVM_FindClassFromLoader
633 static jclass jvm_find_class_from_class_loader(JNIEnv* env, const char* name,
634 jboolean init, jobject loader,
635 jboolean throwError, TRAPS) {
636 // Java libraries should ensure that name is never null...
637 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
638 // It's impossible to create this class; the name cannot fit
639 // into the constant pool.
640 if (throwError) {
641 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
642 } else {
643 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
644 }
645 }
646 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
647 Handle h_loader(THREAD, JNIHandles::resolve(loader));
648 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
649 Handle(), throwError, THREAD);
650
651 if (TraceClassResolution && result != NULL) {
652 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
653 }
654 return result;
655 }
656
657 // Rationale behind JVM_FindClassFromBootLoader
658 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
659 // b> because of (a) java.dll has a direct dependecy on the unexported
660 // private symbol "_JVM_FindClassFromClassLoader@20".
661 // c> the launcher cannot use the private symbol as it dynamically opens
662 // the entry point, so if something changes, the launcher will fail
663 // unexpectedly at runtime, it is safest for the launcher to dlopen a
664 // stable exported interface.
665 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
666 // signature to change from _JVM_FindClassFromClassLoader@20 to
667 // JVM_FindClassFromClassLoader and will not be backward compatible
668 // with older JDKs.
669 // Thus a public/stable exported entry point is the right solution,
670 // public here means public in linker semantics, and is exported only
671 // to the JDK, and is not intended to be a public API.
672
673 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
674 const char* name,
675 jboolean throwError))
676 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name,
677 throwError ? "error" : "exception");
678 return jvm_find_class_from_class_loader(env, name, JNI_FALSE,
679 (jobject)NULL, throwError, THREAD);
680 JVM_END
681
682 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
683 jboolean init, jobject loader,
684 jboolean throwError))
685 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
686 throwError ? "error" : "exception");
687 return jvm_find_class_from_class_loader(env, name, init, loader,
688 throwError, THREAD);
689 JVM_END
690
691
692 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
693 jboolean init, jclass from))
694 JVMWrapper2("JVM_FindClassFromClass %s", name);
695 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
696 // It's impossible to create this class; the name cannot fit
697 // into the constant pool.
698 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
699 }
700 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
701 oop from_class_oop = JNIHandles::resolve(from);
702 klassOop from_class = (from_class_oop == NULL)
703 ? (klassOop)NULL
704 : java_lang_Class::as_klassOop(from_class_oop);
705 oop class_loader = NULL;
706 oop protection_domain = NULL;
707 if (from_class != NULL) {
708 class_loader = Klass::cast(from_class)->class_loader();
709 protection_domain = Klass::cast(from_class)->protection_domain();
710 }
711 Handle h_loader(THREAD, class_loader);
712 Handle h_prot (THREAD, protection_domain);
713 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
714 h_prot, true, thread);
715
716 if (TraceClassResolution && result != NULL) {
717 // this function is generally only used for class loading during verification.
718 ResourceMark rm;
719 oop from_mirror = JNIHandles::resolve_non_null(from);
720 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
721 const char * from_name = Klass::cast(from_class)->external_name();
722
723 oop mirror = JNIHandles::resolve_non_null(result);
724 klassOop to_class = java_lang_Class::as_klassOop(mirror);
725 const char * to = Klass::cast(to_class)->external_name();
726 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
727 }
728
729 return result;
730 JVM_END
731
732 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
733 if (loader.is_null()) {
734 return;
735 }
736
737 // check whether the current caller thread holds the lock or not.
738 // If not, increment the corresponding counter
739 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
740 ObjectSynchronizer::owner_self) {
741 counter->inc();
742 }
743 }
744
745 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
746 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
747 if (source == NULL) source = "__JVM_DefineClass__";
748
749 // Since exceptions can be thrown, class initialization can take place
750 // if name is NULL no check for class name in .class stream has to be made.
751 symbolHandle class_name;
752 if (name != NULL) {
753 const int str_len = (int)strlen(name);
754 if (str_len > symbolOopDesc::max_length()) {
755 // It's impossible to create this class; the name cannot fit
756 // into the constant pool.
757 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
758 }
759 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
760 }
761
762 ResourceMark rm(THREAD);
763 ClassFileStream st((u1*) buf, len, (char *)source);
764 Handle class_loader (THREAD, JNIHandles::resolve(loader));
765 if (UsePerfData) {
766 is_lock_held_by_thread(class_loader,
767 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
768 THREAD);
769 }
770 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
771 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
772 protection_domain, &st,
773 CHECK_NULL);
774
775 if (TraceClassResolution && k != NULL) {
776 trace_class_resolution(k);
777 }
778
779 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
780 }
781
782
783 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
784 JVMWrapper2("JVM_DefineClass %s", name);
785
786 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
787 JVM_END
788
789
790 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
791 JVMWrapper2("JVM_DefineClassWithSource %s", name);
792
793 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
794 JVM_END
795
796
797 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
798 JVMWrapper("JVM_FindLoadedClass");
799 ResourceMark rm(THREAD);
800
801 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
802 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
803
804 const char* str = java_lang_String::as_utf8_string(string());
805 // Sanity check, don't expect null
806 if (str == NULL) return NULL;
807
808 const int str_len = (int)strlen(str);
809 if (str_len > symbolOopDesc::max_length()) {
810 // It's impossible to create this class; the name cannot fit
811 // into the constant pool.
812 return NULL;
813 }
814 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
815
816 // Security Note:
817 // The Java level wrapper will perform the necessary security check allowing
818 // us to pass the NULL as the initiating class loader.
819 Handle h_loader(THREAD, JNIHandles::resolve(loader));
820 if (UsePerfData) {
821 is_lock_held_by_thread(h_loader,
822 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
823 THREAD);
824 }
825
826 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
827 h_loader,
828 Handle(),
829 CHECK_NULL);
830
831 return (k == NULL) ? NULL :
832 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
833 JVM_END
834
835
836 // Reflection support //////////////////////////////////////////////////////////////////////////////
837
838 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
839 assert (cls != NULL, "illegal class");
840 JVMWrapper("JVM_GetClassName");
841 JvmtiVMObjectAllocEventCollector oam;
842 ResourceMark rm(THREAD);
843 const char* name;
844 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
845 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
846 } else {
847 // Consider caching interned string in Klass
848 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
849 assert(k->is_klass(), "just checking");
850 name = Klass::cast(k)->external_name();
851 }
852 oop result = StringTable::intern((char*) name, CHECK_NULL);
853 return (jstring) JNIHandles::make_local(env, result);
854 JVM_END
855
856
857 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
858 JVMWrapper("JVM_GetClassInterfaces");
859 JvmtiVMObjectAllocEventCollector oam;
860 oop mirror = JNIHandles::resolve_non_null(cls);
861
862 // Special handling for primitive objects
863 if (java_lang_Class::is_primitive(mirror)) {
864 // Primitive objects does not have any interfaces
865 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
866 return (jobjectArray) JNIHandles::make_local(env, r);
867 }
868
869 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
870 // Figure size of result array
871 int size;
872 if (klass->oop_is_instance()) {
873 size = instanceKlass::cast(klass())->local_interfaces()->length();
874 } else {
875 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
876 size = 2;
877 }
878
879 // Allocate result array
880 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
881 objArrayHandle result (THREAD, r);
882 // Fill in result
883 if (klass->oop_is_instance()) {
884 // Regular instance klass, fill in all local interfaces
885 for (int index = 0; index < size; index++) {
886 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
887 result->obj_at_put(index, Klass::cast(k)->java_mirror());
888 }
889 } else {
890 // All arrays implement java.lang.Cloneable and java.io.Serializable
891 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
892 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
893 }
894 return (jobjectArray) JNIHandles::make_local(env, result());
895 JVM_END
896
897
898 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
899 JVMWrapper("JVM_GetClassLoader");
900 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
901 return NULL;
902 }
903 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
904 oop loader = Klass::cast(k)->class_loader();
905 return JNIHandles::make_local(env, loader);
906 JVM_END
907
908
909 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
910 JVMWrapper("JVM_IsInterface");
911 oop mirror = JNIHandles::resolve_non_null(cls);
912 if (java_lang_Class::is_primitive(mirror)) {
913 return JNI_FALSE;
914 }
915 klassOop k = java_lang_Class::as_klassOop(mirror);
916 jboolean result = Klass::cast(k)->is_interface();
917 assert(!result || Klass::cast(k)->oop_is_instance(),
918 "all interfaces are instance types");
919 // The compiler intrinsic for isInterface tests the
920 // Klass::_access_flags bits in the same way.
921 return result;
922 JVM_END
923
924
925 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
926 JVMWrapper("JVM_GetClassSigners");
927 JvmtiVMObjectAllocEventCollector oam;
928 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
929 // There are no signers for primitive types
930 return NULL;
931 }
932
933 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
934 objArrayOop signers = NULL;
935 if (Klass::cast(k)->oop_is_instance()) {
936 signers = instanceKlass::cast(k)->signers();
937 }
938
939 // If there are no signers set in the class, or if the class
940 // is an array, return NULL.
941 if (signers == NULL) return NULL;
942
943 // copy of the signers array
944 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
945 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
946 for (int index = 0; index < signers->length(); index++) {
947 signers_copy->obj_at_put(index, signers->obj_at(index));
948 }
949
950 // return the copy
951 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
952 JVM_END
953
954
955 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
956 JVMWrapper("JVM_SetClassSigners");
957 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
958 // This call is ignored for primitive types and arrays.
959 // Signers are only set once, ClassLoader.java, and thus shouldn't
960 // be called with an array. Only the bootstrap loader creates arrays.
961 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
962 if (Klass::cast(k)->oop_is_instance()) {
963 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
964 }
965 }
966 JVM_END
967
968
969 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
970 JVMWrapper("JVM_GetProtectionDomain");
971 if (JNIHandles::resolve(cls) == NULL) {
972 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
973 }
974
975 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
976 // Primitive types does not have a protection domain.
977 return NULL;
978 }
979
980 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
981 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
982 JVM_END
983
984
985 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
986 // still defined in core libraries as of 1.5.
987 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
988 JVMWrapper("JVM_SetProtectionDomain");
989 if (JNIHandles::resolve(cls) == NULL) {
990 THROW(vmSymbols::java_lang_NullPointerException());
991 }
992 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
993 // Call is ignored for primitive types
994 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
995
996 // cls won't be an array, as this called only from ClassLoader.defineClass
997 if (Klass::cast(k)->oop_is_instance()) {
998 oop pd = JNIHandles::resolve(protection_domain);
999 assert(pd == NULL || pd->is_oop(), "just checking");
1000 instanceKlass::cast(k)->set_protection_domain(pd);
1001 }
1002 }
1003 JVM_END
1004
1005
1006 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1007 JVMWrapper("JVM_DoPrivileged");
1008
1009 if (action == NULL) {
1010 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1011 }
1012
1013 // Stack allocated list of privileged stack elements
1014 PrivilegedElement pi;
1015
1016 // Check that action object understands "Object run()"
1017 Handle object (THREAD, JNIHandles::resolve(action));
1018
1019 // get run() method
1020 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1021 vmSymbols::run_method_name(),
1022 vmSymbols::void_object_signature());
1023 methodHandle m (THREAD, m_oop);
1024 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1025 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1026 }
1027
1028 // Compute the frame initiating the do privileged operation and setup the privileged stack
1029 vframeStream vfst(thread);
1030 vfst.security_get_caller_frame(1);
1031
1032 if (!vfst.at_end()) {
1033 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1034 thread->set_privileged_stack_top(&pi);
1035 }
1036
1037
1038 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1039 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1040 Handle pending_exception;
1041 JavaValue result(T_OBJECT);
1042 JavaCallArguments args(object);
1043 JavaCalls::call(&result, m, &args, THREAD);
1044
1045 // done with action, remove ourselves from the list
1046 if (!vfst.at_end()) {
1047 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1048 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1049 }
1050
1051 if (HAS_PENDING_EXCEPTION) {
1052 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1053 CLEAR_PENDING_EXCEPTION;
1054
1055 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1056 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1057 // Throw a java.security.PrivilegedActionException(Exception e) exception
1058 JavaCallArguments args(pending_exception);
1059 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1060 vmSymbolHandles::exception_void_signature(),
1061 &args);
1062 }
1063 }
1064
1065 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1066 return JNIHandles::make_local(env, (oop) result.get_jobject());
1067 JVM_END
1068
1069
1070 // Returns the inherited_access_control_context field of the running thread.
1071 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1072 JVMWrapper("JVM_GetInheritedAccessControlContext");
1073 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1074 return JNIHandles::make_local(env, result);
1075 JVM_END
1076
1077 class RegisterArrayForGC {
1078 private:
1079 JavaThread *_thread;
1080 public:
1081 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1082 _thread = thread;
1083 _thread->register_array_for_gc(array);
1084 }
1085
1086 ~RegisterArrayForGC() {
1087 _thread->register_array_for_gc(NULL);
1088 }
1089 };
1090
1091
1092 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1093 JVMWrapper("JVM_GetStackAccessControlContext");
1094 if (!UsePrivilegedStack) return NULL;
1095
1096 ResourceMark rm(THREAD);
1097 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1098 JvmtiVMObjectAllocEventCollector oam;
1099
1100 // count the protection domains on the execution stack. We collapse
1101 // duplicate consecutive protection domains into a single one, as
1102 // well as stopping when we hit a privileged frame.
1103
1104 // Use vframeStream to iterate through Java frames
1105 vframeStream vfst(thread);
1106
1107 oop previous_protection_domain = NULL;
1108 Handle privileged_context(thread, NULL);
1109 bool is_privileged = false;
1110 oop protection_domain = NULL;
1111
1112 for(; !vfst.at_end(); vfst.next()) {
1113 // get method of frame
1114 methodOop method = vfst.method();
1115 intptr_t* frame_id = vfst.frame_id();
1116
1117 // check the privileged frames to see if we have a match
1118 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1119 // this frame is privileged
1120 is_privileged = true;
1121 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1122 protection_domain = thread->privileged_stack_top()->protection_domain();
1123 } else {
1124 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1125 }
1126
1127 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1128 local_array->push(protection_domain);
1129 previous_protection_domain = protection_domain;
1130 }
1131
1132 if (is_privileged) break;
1133 }
1134
1135
1136 // either all the domains on the stack were system domains, or
1137 // we had a privileged system domain
1138 if (local_array->is_empty()) {
1139 if (is_privileged && privileged_context.is_null()) return NULL;
1140
1141 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1142 return JNIHandles::make_local(env, result);
1143 }
1144
1145 // the resource area must be registered in case of a gc
1146 RegisterArrayForGC ragc(thread, local_array);
1147 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1148 local_array->length(), CHECK_NULL);
1149 objArrayHandle h_context(thread, context);
1150 for (int index = 0; index < local_array->length(); index++) {
1151 h_context->obj_at_put(index, local_array->at(index));
1152 }
1153
1154 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1155
1156 return JNIHandles::make_local(env, result);
1157 JVM_END
1158
1159
1160 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1161 JVMWrapper("JVM_IsArrayClass");
1162 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1163 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1164 JVM_END
1165
1166
1167 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1168 JVMWrapper("JVM_IsPrimitiveClass");
1169 oop mirror = JNIHandles::resolve_non_null(cls);
1170 return (jboolean) java_lang_Class::is_primitive(mirror);
1171 JVM_END
1172
1173
1174 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1175 JVMWrapper("JVM_GetComponentType");
1176 oop mirror = JNIHandles::resolve_non_null(cls);
1177 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1178 return (jclass) JNIHandles::make_local(env, result);
1179 JVM_END
1180
1181
1182 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1183 JVMWrapper("JVM_GetClassModifiers");
1184 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1185 // Primitive type
1186 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1187 }
1188
1189 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1190 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1191 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1192 return k->modifier_flags();
1193 JVM_END
1194
1195
1196 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1197
1198 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1199 const int inner_class_info_index = 0;
1200 const int outer_class_info_index = 1;
1201
1202 JvmtiVMObjectAllocEventCollector oam;
1203 // ofClass is a reference to a java_lang_Class object. The mirror object
1204 // of an instanceKlass
1205
1206 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1207 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1208 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1209 return (jobjectArray)JNIHandles::make_local(env, result);
1210 }
1211
1212 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1213
1214 if (k->inner_classes()->length() == 0) {
1215 // Neither an inner nor outer class
1216 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1217 return (jobjectArray)JNIHandles::make_local(env, result);
1218 }
1219
1220 // find inner class info
1221 typeArrayHandle icls(thread, k->inner_classes());
1222 constantPoolHandle cp(thread, k->constants());
1223 int length = icls->length();
1224
1225 // Allocate temp. result array
1226 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1227 objArrayHandle result (THREAD, r);
1228 int members = 0;
1229
1230 for(int i = 0; i < length; i += 4) {
1231 int ioff = icls->ushort_at(i + inner_class_info_index);
1232 int ooff = icls->ushort_at(i + outer_class_info_index);
1233
1234 if (ioff != 0 && ooff != 0) {
1235 // Check to see if the name matches the class we're looking for
1236 // before attempting to find the class.
1237 if (cp->klass_name_at_matches(k, ooff)) {
1238 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1239 if (outer_klass == k()) {
1240 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1241 instanceKlassHandle inner_klass (THREAD, ik);
1242
1243 // Throws an exception if outer klass has not declared k as
1244 // an inner klass
1245 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL);
1246
1247 result->obj_at_put(members, inner_klass->java_mirror());
1248 members++;
1249 }
1250 }
1251 }
1252 }
1253
1254 if (members != length) {
1255 // Return array of right length
1256 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1257 for(int i = 0; i < members; i++) {
1258 res->obj_at_put(i, result->obj_at(i));
1259 }
1260 return (jobjectArray)JNIHandles::make_local(env, res);
1261 }
1262
1263 return (jobjectArray)JNIHandles::make_local(env, result());
1264 JVM_END
1265
1266
1267 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1268 const int inner_class_info_index = 0;
1269 const int outer_class_info_index = 1;
1270
1271 // ofClass is a reference to a java_lang_Class object.
1272 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1273 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1274 return NULL;
1275 }
1276
1277 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1278
1279 if (k->inner_classes()->length() == 0) {
1280 // No inner class info => no declaring class
1281 return NULL;
1282 }
1283
1284 typeArrayHandle i_icls(thread, k->inner_classes());
1285 constantPoolHandle i_cp(thread, k->constants());
1286 int i_length = i_icls->length();
1287
1288 bool found = false;
1289 klassOop ok;
1290 instanceKlassHandle outer_klass;
1291
1292 // Find inner_klass attribute
1293 for(int i = 0; i < i_length && !found; i+= 4) {
1294 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1295 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1296
1297 if (ioff != 0 && ooff != 0) {
1298 // Check to see if the name matches the class we're looking for
1299 // before attempting to find the class.
1300 if (i_cp->klass_name_at_matches(k, ioff)) {
1301 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1302 if (k() == inner_klass) {
1303 found = true;
1304 ok = i_cp->klass_at(ooff, CHECK_NULL);
1305 outer_klass = instanceKlassHandle(thread, ok);
1306 }
1307 }
1308 }
1309 }
1310
1311 // If no inner class attribute found for this class.
1312 if (!found) return NULL;
1313
1314 // Throws an exception if outer klass has not declared k as an inner klass
1315 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL);
1316
1317 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror());
1318 JVM_END
1319
1320
1321 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1322 assert (cls != NULL, "illegal class");
1323 JVMWrapper("JVM_GetClassSignature");
1324 JvmtiVMObjectAllocEventCollector oam;
1325 ResourceMark rm(THREAD);
1326 // Return null for arrays and primatives
1327 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1328 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1329 if (Klass::cast(k)->oop_is_instance()) {
1330 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1331 if (sym.is_null()) return NULL;
1332 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1333 return (jstring) JNIHandles::make_local(env, str());
1334 }
1335 }
1336 return NULL;
1337 JVM_END
1338
1339
1340 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1341 assert (cls != NULL, "illegal class");
1342 JVMWrapper("JVM_GetClassAnnotations");
1343 ResourceMark rm(THREAD);
1344 // Return null for arrays and primitives
1345 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1346 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1347 if (Klass::cast(k)->oop_is_instance()) {
1348 return (jbyteArray) JNIHandles::make_local(env,
1349 instanceKlass::cast(k)->class_annotations());
1350 }
1351 }
1352 return NULL;
1353 JVM_END
1354
1355
1356 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1357 assert(field != NULL, "illegal field");
1358 JVMWrapper("JVM_GetFieldAnnotations");
1359
1360 // some of this code was adapted from from jni_FromReflectedField
1361
1362 // field is a handle to a java.lang.reflect.Field object
1363 oop reflected = JNIHandles::resolve_non_null(field);
1364 oop mirror = java_lang_reflect_Field::clazz(reflected);
1365 klassOop k = java_lang_Class::as_klassOop(mirror);
1366 int slot = java_lang_reflect_Field::slot(reflected);
1367 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1368
1369 fieldDescriptor fd;
1370 KlassHandle kh(THREAD, k);
1371 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1372
1373 if (modifiers & JVM_ACC_STATIC) {
1374 // for static fields we only look in the current class
1375 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1376 true, &fd)) {
1377 assert(false, "cannot find static field");
1378 return NULL; // robustness
1379 }
1380 } else {
1381 // for instance fields we start with the current class and work
1382 // our way up through the superclass chain
1383 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1384 &fd)) {
1385 assert(false, "cannot find instance field");
1386 return NULL; // robustness
1387 }
1388 }
1389
1390 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1391 JVM_END
1392
1393
1394 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1395 // some of this code was adapted from from jni_FromReflectedMethod
1396
1397 oop reflected = JNIHandles::resolve_non_null(method);
1398 oop mirror = NULL;
1399 int slot = 0;
1400
1401 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1402 mirror = java_lang_reflect_Constructor::clazz(reflected);
1403 slot = java_lang_reflect_Constructor::slot(reflected);
1404 } else {
1405 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1406 "wrong type");
1407 mirror = java_lang_reflect_Method::clazz(reflected);
1408 slot = java_lang_reflect_Method::slot(reflected);
1409 }
1410 klassOop k = java_lang_Class::as_klassOop(mirror);
1411
1412 KlassHandle kh(THREAD, k);
1413 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1414 if (m == NULL) {
1415 assert(false, "cannot find method");
1416 return NULL; // robustness
1417 }
1418
1419 return m;
1420 }
1421
1422
1423 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1424 JVMWrapper("JVM_GetMethodAnnotations");
1425
1426 // method is a handle to a java.lang.reflect.Method object
1427 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1428 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1429 JVM_END
1430
1431
1432 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1433 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1434
1435 // method is a handle to a java.lang.reflect.Method object
1436 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1437 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1438 JVM_END
1439
1440
1441 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1442 JVMWrapper("JVM_GetMethodParameterAnnotations");
1443
1444 // method is a handle to a java.lang.reflect.Method object
1445 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1446 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1447 JVM_END
1448
1449
1450 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1451
1452 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1453 {
1454 JVMWrapper("JVM_GetClassDeclaredFields");
1455 JvmtiVMObjectAllocEventCollector oam;
1456
1457 // Exclude primitive types and array types
1458 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1459 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1460 // Return empty array
1461 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1462 return (jobjectArray) JNIHandles::make_local(env, res);
1463 }
1464
1465 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1466 constantPoolHandle cp(THREAD, k->constants());
1467
1468 // Ensure class is linked
1469 k->link_class(CHECK_NULL);
1470
1471 typeArrayHandle fields(THREAD, k->fields());
1472 int fields_len = fields->length();
1473
1474 // 4496456 We need to filter out java.lang.Throwable.backtrace
1475 bool skip_backtrace = false;
1476
1477 // Allocate result
1478 int num_fields;
1479
1480 if (publicOnly) {
1481 num_fields = 0;
1482 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1483 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1484 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1485 }
1486 } else {
1487 num_fields = fields_len / instanceKlass::next_offset;
1488
1489 if (k() == SystemDictionary::throwable_klass()) {
1490 num_fields--;
1491 skip_backtrace = true;
1492 }
1493 }
1494
1495 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1496 objArrayHandle result (THREAD, r);
1497
1498 int out_idx = 0;
1499 fieldDescriptor fd;
1500 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1501 if (skip_backtrace) {
1502 // 4496456 skip java.lang.Throwable.backtrace
1503 int offset = k->offset_from_fields(i);
1504 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1505 }
1506
1507 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1508 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1509 fd.initialize(k(), i);
1510 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1511 result->obj_at_put(out_idx, field);
1512 ++out_idx;
1513 }
1514 }
1515 assert(out_idx == num_fields, "just checking");
1516 return (jobjectArray) JNIHandles::make_local(env, result());
1517 }
1518 JVM_END
1519
1520 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1521 {
1522 JVMWrapper("JVM_GetClassDeclaredMethods");
1523 JvmtiVMObjectAllocEventCollector oam;
1524
1525 // Exclude primitive types and array types
1526 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1527 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1528 // Return empty array
1529 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1530 return (jobjectArray) JNIHandles::make_local(env, res);
1531 }
1532
1533 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1534
1535 // Ensure class is linked
1536 k->link_class(CHECK_NULL);
1537
1538 objArrayHandle methods (THREAD, k->methods());
1539 int methods_length = methods->length();
1540 int num_methods = 0;
1541
1542 int i;
1543 for (i = 0; i < methods_length; i++) {
1544 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1545 if (!method->is_initializer()) {
1546 if (!publicOnly || method->is_public()) {
1547 ++num_methods;
1548 }
1549 }
1550 }
1551
1552 // Allocate result
1553 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1554 objArrayHandle result (THREAD, r);
1555
1556 int out_idx = 0;
1557 for (i = 0; i < methods_length; i++) {
1558 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1559 if (!method->is_initializer()) {
1560 if (!publicOnly || method->is_public()) {
1561 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1562 result->obj_at_put(out_idx, m);
1563 ++out_idx;
1564 }
1565 }
1566 }
1567 assert(out_idx == num_methods, "just checking");
1568 return (jobjectArray) JNIHandles::make_local(env, result());
1569 }
1570 JVM_END
1571
1572 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1573 {
1574 JVMWrapper("JVM_GetClassDeclaredConstructors");
1575 JvmtiVMObjectAllocEventCollector oam;
1576
1577 // Exclude primitive types and array types
1578 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1579 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1580 // Return empty array
1581 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1582 return (jobjectArray) JNIHandles::make_local(env, res);
1583 }
1584
1585 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1586
1587 // Ensure class is linked
1588 k->link_class(CHECK_NULL);
1589
1590 objArrayHandle methods (THREAD, k->methods());
1591 int methods_length = methods->length();
1592 int num_constructors = 0;
1593
1594 int i;
1595 for (i = 0; i < methods_length; i++) {
1596 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1597 if (method->is_initializer() && !method->is_static()) {
1598 if (!publicOnly || method->is_public()) {
1599 ++num_constructors;
1600 }
1601 }
1602 }
1603
1604 // Allocate result
1605 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1606 objArrayHandle result(THREAD, r);
1607
1608 int out_idx = 0;
1609 for (i = 0; i < methods_length; i++) {
1610 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1611 if (method->is_initializer() && !method->is_static()) {
1612 if (!publicOnly || method->is_public()) {
1613 oop m = Reflection::new_constructor(method, CHECK_NULL);
1614 result->obj_at_put(out_idx, m);
1615 ++out_idx;
1616 }
1617 }
1618 }
1619 assert(out_idx == num_constructors, "just checking");
1620 return (jobjectArray) JNIHandles::make_local(env, result());
1621 }
1622 JVM_END
1623
1624 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1625 {
1626 JVMWrapper("JVM_GetClassAccessFlags");
1627 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1628 // Primitive type
1629 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1630 }
1631
1632 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1633 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1634 }
1635 JVM_END
1636
1637
1638 // Constant pool access //////////////////////////////////////////////////////////
1639
1640 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1641 {
1642 JVMWrapper("JVM_GetClassConstantPool");
1643 JvmtiVMObjectAllocEventCollector oam;
1644
1645 // Return null for primitives and arrays
1646 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1647 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1648 if (Klass::cast(k)->oop_is_instance()) {
1649 instanceKlassHandle k_h(THREAD, k);
1650 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1651 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1652 return JNIHandles::make_local(jcp());
1653 }
1654 }
1655 return NULL;
1656 }
1657 JVM_END
1658
1659
1660 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1661 {
1662 JVMWrapper("JVM_ConstantPoolGetSize");
1663 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1664 return cp->length();
1665 }
1666 JVM_END
1667
1668
1669 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1670 if (!cp->is_within_bounds(index)) {
1671 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1672 }
1673 }
1674
1675
1676 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1677 {
1678 JVMWrapper("JVM_ConstantPoolGetClassAt");
1679 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1680 bounds_check(cp, index, CHECK_NULL);
1681 constantTag tag = cp->tag_at(index);
1682 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1683 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1684 }
1685 klassOop k = cp->klass_at(index, CHECK_NULL);
1686 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1687 }
1688 JVM_END
1689
1690
1691 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1692 {
1693 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1694 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1695 bounds_check(cp, index, CHECK_NULL);
1696 constantTag tag = cp->tag_at(index);
1697 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1698 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1699 }
1700 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1701 if (k == NULL) return NULL;
1702 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1703 }
1704 JVM_END
1705
1706 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1707 constantTag tag = cp->tag_at(index);
1708 if (!tag.is_method() && !tag.is_interface_method()) {
1709 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1710 }
1711 int klass_ref = cp->uncached_klass_ref_index_at(index);
1712 klassOop k_o;
1713 if (force_resolution) {
1714 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1715 } else {
1716 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1717 if (k_o == NULL) return NULL;
1718 }
1719 instanceKlassHandle k(THREAD, k_o);
1720 symbolOop name = cp->uncached_name_ref_at(index);
1721 symbolOop sig = cp->uncached_signature_ref_at(index);
1722 methodHandle m (THREAD, k->find_method(name, sig));
1723 if (m.is_null()) {
1724 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1725 }
1726 oop method;
1727 if (!m->is_initializer() || m->is_static()) {
1728 method = Reflection::new_method(m, true, true, CHECK_NULL);
1729 } else {
1730 method = Reflection::new_constructor(m, CHECK_NULL);
1731 }
1732 return JNIHandles::make_local(method);
1733 }
1734
1735 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1736 {
1737 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1738 JvmtiVMObjectAllocEventCollector oam;
1739 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1740 bounds_check(cp, index, CHECK_NULL);
1741 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1742 return res;
1743 }
1744 JVM_END
1745
1746 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1747 {
1748 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1749 JvmtiVMObjectAllocEventCollector oam;
1750 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1751 bounds_check(cp, index, CHECK_NULL);
1752 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1753 return res;
1754 }
1755 JVM_END
1756
1757 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1758 constantTag tag = cp->tag_at(index);
1759 if (!tag.is_field()) {
1760 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1761 }
1762 int klass_ref = cp->uncached_klass_ref_index_at(index);
1763 klassOop k_o;
1764 if (force_resolution) {
1765 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1766 } else {
1767 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1768 if (k_o == NULL) return NULL;
1769 }
1770 instanceKlassHandle k(THREAD, k_o);
1771 symbolOop name = cp->uncached_name_ref_at(index);
1772 symbolOop sig = cp->uncached_signature_ref_at(index);
1773 fieldDescriptor fd;
1774 klassOop target_klass = k->find_field(name, sig, &fd);
1775 if (target_klass == NULL) {
1776 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1777 }
1778 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1779 return JNIHandles::make_local(field);
1780 }
1781
1782 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1783 {
1784 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1785 JvmtiVMObjectAllocEventCollector oam;
1786 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1787 bounds_check(cp, index, CHECK_NULL);
1788 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1789 return res;
1790 }
1791 JVM_END
1792
1793 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1794 {
1795 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1796 JvmtiVMObjectAllocEventCollector oam;
1797 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1798 bounds_check(cp, index, CHECK_NULL);
1799 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1800 return res;
1801 }
1802 JVM_END
1803
1804 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1805 {
1806 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1807 JvmtiVMObjectAllocEventCollector oam;
1808 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1809 bounds_check(cp, index, CHECK_NULL);
1810 constantTag tag = cp->tag_at(index);
1811 if (!tag.is_field_or_method()) {
1812 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1813 }
1814 int klass_ref = cp->uncached_klass_ref_index_at(index);
1815 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1816 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1817 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1818 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1819 objArrayHandle dest(THREAD, dest_o);
1820 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1821 dest->obj_at_put(0, str());
1822 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1823 dest->obj_at_put(1, str());
1824 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1825 dest->obj_at_put(2, str());
1826 return (jobjectArray) JNIHandles::make_local(dest());
1827 }
1828 JVM_END
1829
1830 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1831 {
1832 JVMWrapper("JVM_ConstantPoolGetIntAt");
1833 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1834 bounds_check(cp, index, CHECK_0);
1835 constantTag tag = cp->tag_at(index);
1836 if (!tag.is_int()) {
1837 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1838 }
1839 return cp->int_at(index);
1840 }
1841 JVM_END
1842
1843 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1844 {
1845 JVMWrapper("JVM_ConstantPoolGetLongAt");
1846 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1847 bounds_check(cp, index, CHECK_(0L));
1848 constantTag tag = cp->tag_at(index);
1849 if (!tag.is_long()) {
1850 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1851 }
1852 return cp->long_at(index);
1853 }
1854 JVM_END
1855
1856 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1857 {
1858 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1860 bounds_check(cp, index, CHECK_(0.0f));
1861 constantTag tag = cp->tag_at(index);
1862 if (!tag.is_float()) {
1863 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1864 }
1865 return cp->float_at(index);
1866 }
1867 JVM_END
1868
1869 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1870 {
1871 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1873 bounds_check(cp, index, CHECK_(0.0));
1874 constantTag tag = cp->tag_at(index);
1875 if (!tag.is_double()) {
1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1877 }
1878 return cp->double_at(index);
1879 }
1880 JVM_END
1881
1882 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1883 {
1884 JVMWrapper("JVM_ConstantPoolGetStringAt");
1885 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1886 bounds_check(cp, index, CHECK_NULL);
1887 constantTag tag = cp->tag_at(index);
1888 if (!tag.is_string() && !tag.is_unresolved_string()) {
1889 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1890 }
1891 oop str = cp->string_at(index, CHECK_NULL);
1892 return (jstring) JNIHandles::make_local(str);
1893 }
1894 JVM_END
1895
1896 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1897 {
1898 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1899 JvmtiVMObjectAllocEventCollector oam;
1900 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1901 bounds_check(cp, index, CHECK_NULL);
1902 constantTag tag = cp->tag_at(index);
1903 if (!tag.is_symbol()) {
1904 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1905 }
1906 symbolOop sym_o = cp->symbol_at(index);
1907 symbolHandle sym(THREAD, sym_o);
1908 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1909 return (jstring) JNIHandles::make_local(str());
1910 }
1911 JVM_END
1912
1913
1914 // Assertion support. //////////////////////////////////////////////////////////
1915
1916 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1917 JVMWrapper("JVM_DesiredAssertionStatus");
1918 assert(cls != NULL, "bad class");
1919
1920 oop r = JNIHandles::resolve(cls);
1921 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1922 if (java_lang_Class::is_primitive(r)) return false;
1923
1924 klassOop k = java_lang_Class::as_klassOop(r);
1925 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
1926 if (! Klass::cast(k)->oop_is_instance()) return false;
1927
1928 ResourceMark rm(THREAD);
1929 const char* name = Klass::cast(k)->name()->as_C_string();
1930 bool system_class = Klass::cast(k)->class_loader() == NULL;
1931 return JavaAssertions::enabled(name, system_class);
1932
1933 JVM_END
1934
1935
1936 // Return a new AssertionStatusDirectives object with the fields filled in with
1937 // command-line assertion arguments (i.e., -ea, -da).
1938 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
1939 JVMWrapper("JVM_AssertionStatusDirectives");
1940 JvmtiVMObjectAllocEventCollector oam;
1941 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
1942 return JNIHandles::make_local(env, asd);
1943 JVM_END
1944
1945 // Verification ////////////////////////////////////////////////////////////////////////////////
1946
1947 // Reflection for the verifier /////////////////////////////////////////////////////////////////
1948
1949 // RedefineClasses support: bug 6214132 caused verification to fail.
1950 // All functions from this section should call the jvmtiThreadSate function:
1951 // klassOop class_to_verify_considering_redefinition(klassOop klass).
1952 // The function returns a klassOop of the _scratch_class if the verifier
1953 // was invoked in the middle of the class redefinition.
1954 // Otherwise it returns its argument value which is the _the_class klassOop.
1955 // Please, refer to the description in the jvmtiThreadSate.hpp.
1956
1957 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
1958 JVMWrapper("JVM_GetClassNameUTF");
1959 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1960 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1961 return Klass::cast(k)->name()->as_utf8();
1962 JVM_END
1963
1964
1965 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
1966 JVMWrapper("JVM_GetClassCPTypes");
1967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1968 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1969 // types will have length zero if this is not an instanceKlass
1970 // (length is determined by call to JVM_GetClassCPEntriesCount)
1971 if (Klass::cast(k)->oop_is_instance()) {
1972 constantPoolOop cp = instanceKlass::cast(k)->constants();
1973 for (int index = cp->length() - 1; index >= 0; index--) {
1974 constantTag tag = cp->tag_at(index);
1975 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
1976 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
1977 }
1978 }
1979 JVM_END
1980
1981
1982 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
1983 JVMWrapper("JVM_GetClassCPEntriesCount");
1984 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1985 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1986 if (!Klass::cast(k)->oop_is_instance())
1987 return 0;
1988 return instanceKlass::cast(k)->constants()->length();
1989 JVM_END
1990
1991
1992 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
1993 JVMWrapper("JVM_GetClassFieldsCount");
1994 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1995 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1996 if (!Klass::cast(k)->oop_is_instance())
1997 return 0;
1998 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
1999 JVM_END
2000
2001
2002 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2003 JVMWrapper("JVM_GetClassMethodsCount");
2004 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2005 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2006 if (!Klass::cast(k)->oop_is_instance())
2007 return 0;
2008 return instanceKlass::cast(k)->methods()->length();
2009 JVM_END
2010
2011
2012 // The following methods, used for the verifier, are never called with
2013 // array klasses, so a direct cast to instanceKlass is safe.
2014 // Typically, these methods are called in a loop with bounds determined
2015 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2016 // zero for arrays.
2017 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2018 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2019 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2020 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2021 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2022 int length = methodOop(method)->checked_exceptions_length();
2023 if (length > 0) {
2024 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2025 for (int i = 0; i < length; i++) {
2026 exceptions[i] = table[i].class_cp_index;
2027 }
2028 }
2029 JVM_END
2030
2031
2032 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2033 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2035 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2036 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2037 return methodOop(method)->checked_exceptions_length();
2038 JVM_END
2039
2040
2041 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2042 JVMWrapper("JVM_GetMethodIxByteCode");
2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2045 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2046 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2047 JVM_END
2048
2049
2050 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2051 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2052 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2053 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2054 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2055 return methodOop(method)->code_size();
2056 JVM_END
2057
2058
2059 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2060 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
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 typeArrayOop extable = methodOop(method)->exception_table();
2065 entry->start_pc = extable->int_at(entry_index * 4);
2066 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2067 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2068 entry->catchType = extable->int_at(entry_index * 4 + 3);
2069 JVM_END
2070
2071
2072 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2073 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2074 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2075 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2076 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2077 return methodOop(method)->exception_table()->length() / 4;
2078 JVM_END
2079
2080
2081 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2082 JVMWrapper("JVM_GetMethodIxModifiers");
2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2085 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2086 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2087 JVM_END
2088
2089
2090 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2091 JVMWrapper("JVM_GetFieldIxModifiers");
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2094 typeArrayOop fields = instanceKlass::cast(k)->fields();
2095 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2096 JVM_END
2097
2098
2099 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2100 JVMWrapper("JVM_GetMethodIxLocalsCount");
2101 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2102 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2103 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2104 return methodOop(method)->max_locals();
2105 JVM_END
2106
2107
2108 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2109 JVMWrapper("JVM_GetMethodIxArgsSize");
2110 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2111 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2112 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2113 return methodOop(method)->size_of_parameters();
2114 JVM_END
2115
2116
2117 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2118 JVMWrapper("JVM_GetMethodIxMaxStack");
2119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2120 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2121 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2122 return methodOop(method)->max_stack();
2123 JVM_END
2124
2125
2126 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2127 JVMWrapper("JVM_IsConstructorIx");
2128 ResourceMark rm(THREAD);
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2131 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2132 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2133 JVM_END
2134
2135
2136 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2137 JVMWrapper("JVM_GetMethodIxIxUTF");
2138 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2140 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2141 return methodOop(method)->name()->as_utf8();
2142 JVM_END
2143
2144
2145 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2146 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2147 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2148 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2149 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2150 return methodOop(method)->signature()->as_utf8();
2151 JVM_END
2152
2153 /**
2154 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2155 * read entries in the constant pool. Since the old verifier always
2156 * works on a copy of the code, it will not see any rewriting that
2157 * may possibly occur in the middle of verification. So it is important
2158 * that nothing it calls tries to use the cpCache instead of the raw
2159 * constant pool, so we must use cp->uncached_x methods when appropriate.
2160 */
2161 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2162 JVMWrapper("JVM_GetCPFieldNameUTF");
2163 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2165 constantPoolOop cp = instanceKlass::cast(k)->constants();
2166 switch (cp->tag_at(cp_index).value()) {
2167 case JVM_CONSTANT_Fieldref:
2168 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2169 default:
2170 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2171 }
2172 ShouldNotReachHere();
2173 return NULL;
2174 JVM_END
2175
2176
2177 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2178 JVMWrapper("JVM_GetCPMethodNameUTF");
2179 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2180 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2181 constantPoolOop cp = instanceKlass::cast(k)->constants();
2182 switch (cp->tag_at(cp_index).value()) {
2183 case JVM_CONSTANT_InterfaceMethodref:
2184 case JVM_CONSTANT_Methodref:
2185 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2186 default:
2187 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2188 }
2189 ShouldNotReachHere();
2190 return NULL;
2191 JVM_END
2192
2193
2194 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2195 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2196 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2197 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2198 constantPoolOop cp = instanceKlass::cast(k)->constants();
2199 switch (cp->tag_at(cp_index).value()) {
2200 case JVM_CONSTANT_InterfaceMethodref:
2201 case JVM_CONSTANT_Methodref:
2202 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2203 default:
2204 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2205 }
2206 ShouldNotReachHere();
2207 return NULL;
2208 JVM_END
2209
2210
2211 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2212 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2213 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2214 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2215 constantPoolOop cp = instanceKlass::cast(k)->constants();
2216 switch (cp->tag_at(cp_index).value()) {
2217 case JVM_CONSTANT_Fieldref:
2218 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2219 default:
2220 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2221 }
2222 ShouldNotReachHere();
2223 return NULL;
2224 JVM_END
2225
2226
2227 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2228 JVMWrapper("JVM_GetCPClassNameUTF");
2229 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2230 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2231 constantPoolOop cp = instanceKlass::cast(k)->constants();
2232 symbolOop classname = cp->klass_name_at(cp_index);
2233 return classname->as_utf8();
2234 JVM_END
2235
2236
2237 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2238 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2239 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2240 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2241 constantPoolOop cp = instanceKlass::cast(k)->constants();
2242 switch (cp->tag_at(cp_index).value()) {
2243 case JVM_CONSTANT_Fieldref: {
2244 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2245 symbolOop classname = cp->klass_name_at(class_index);
2246 return classname->as_utf8();
2247 }
2248 default:
2249 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2250 }
2251 ShouldNotReachHere();
2252 return NULL;
2253 JVM_END
2254
2255
2256 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2257 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2258 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2260 constantPoolOop cp = instanceKlass::cast(k)->constants();
2261 switch (cp->tag_at(cp_index).value()) {
2262 case JVM_CONSTANT_Methodref:
2263 case JVM_CONSTANT_InterfaceMethodref: {
2264 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2265 symbolOop classname = cp->klass_name_at(class_index);
2266 return classname->as_utf8();
2267 }
2268 default:
2269 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2270 }
2271 ShouldNotReachHere();
2272 return NULL;
2273 JVM_END
2274
2275
2276 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2277 JVMWrapper("JVM_GetCPFieldModifiers");
2278 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2279 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2280 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2281 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2282 constantPoolOop cp = instanceKlass::cast(k)->constants();
2283 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2284 switch (cp->tag_at(cp_index).value()) {
2285 case JVM_CONSTANT_Fieldref: {
2286 symbolOop name = cp->uncached_name_ref_at(cp_index);
2287 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2288 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2289 int fields_count = fields->length();
2290 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2291 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2292 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2293 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2294 }
2295 }
2296 return -1;
2297 }
2298 default:
2299 fatal("JVM_GetCPFieldModifiers: illegal constant");
2300 }
2301 ShouldNotReachHere();
2302 return 0;
2303 JVM_END
2304
2305
2306 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2307 JVMWrapper("JVM_GetCPMethodModifiers");
2308 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2309 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2310 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2311 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2312 constantPoolOop cp = instanceKlass::cast(k)->constants();
2313 switch (cp->tag_at(cp_index).value()) {
2314 case JVM_CONSTANT_Methodref:
2315 case JVM_CONSTANT_InterfaceMethodref: {
2316 symbolOop name = cp->uncached_name_ref_at(cp_index);
2317 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2318 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2319 int methods_count = methods->length();
2320 for (int i = 0; i < methods_count; i++) {
2321 methodOop method = methodOop(methods->obj_at(i));
2322 if (method->name() == name && method->signature() == signature) {
2323 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2324 }
2325 }
2326 return -1;
2327 }
2328 default:
2329 fatal("JVM_GetCPMethodModifiers: illegal constant");
2330 }
2331 ShouldNotReachHere();
2332 return 0;
2333 JVM_END
2334
2335
2336 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2337
2338 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2339 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2340 JVM_END
2341
2342
2343 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2344 JVMWrapper("JVM_IsSameClassPackage");
2345 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2346 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2347 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2348 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2349 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2350 JVM_END
2351
2352
2353 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2354
2355 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2356 JVMWrapper2("JVM_Open (%s)", fname);
2357
2358 //%note jvm_r6
2359 int result = hpi::open(fname, flags, mode);
2360 if (result >= 0) {
2361 return result;
2362 } else {
2363 switch(errno) {
2364 case EEXIST:
2365 return JVM_EEXIST;
2366 default:
2367 return -1;
2368 }
2369 }
2370 JVM_END
2371
2372
2373 JVM_LEAF(jint, JVM_Close(jint fd))
2374 JVMWrapper2("JVM_Close (0x%x)", fd);
2375 //%note jvm_r6
2376 return hpi::close(fd);
2377 JVM_END
2378
2379
2380 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2381 JVMWrapper2("JVM_Read (0x%x)", fd);
2382
2383 //%note jvm_r6
2384 return (jint)hpi::read(fd, buf, nbytes);
2385 JVM_END
2386
2387
2388 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2389 JVMWrapper2("JVM_Write (0x%x)", fd);
2390
2391 //%note jvm_r6
2392 return (jint)hpi::write(fd, buf, nbytes);
2393 JVM_END
2394
2395
2396 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2397 JVMWrapper2("JVM_Available (0x%x)", fd);
2398 //%note jvm_r6
2399 return hpi::available(fd, pbytes);
2400 JVM_END
2401
2402
2403 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2404 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2405 //%note jvm_r6
2406 return hpi::lseek(fd, offset, whence);
2407 JVM_END
2408
2409
2410 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2411 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2412 return hpi::ftruncate(fd, length);
2413 JVM_END
2414
2415
2416 JVM_LEAF(jint, JVM_Sync(jint fd))
2417 JVMWrapper2("JVM_Sync (0x%x)", fd);
2418 //%note jvm_r6
2419 return hpi::fsync(fd);
2420 JVM_END
2421
2422
2423 // Printing support //////////////////////////////////////////////////
2424 extern "C" {
2425
2426 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2427 // see bug 4399518, 4417214
2428 if ((intptr_t)count <= 0) return -1;
2429 return vsnprintf(str, count, fmt, args);
2430 }
2431
2432
2433 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2434 va_list args;
2435 int len;
2436 va_start(args, fmt);
2437 len = jio_vsnprintf(str, count, fmt, args);
2438 va_end(args);
2439 return len;
2440 }
2441
2442
2443 int jio_fprintf(FILE* f, const char *fmt, ...) {
2444 int len;
2445 va_list args;
2446 va_start(args, fmt);
2447 len = jio_vfprintf(f, fmt, args);
2448 va_end(args);
2449 return len;
2450 }
2451
2452
2453 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2454 if (Arguments::vfprintf_hook() != NULL) {
2455 return Arguments::vfprintf_hook()(f, fmt, args);
2456 } else {
2457 return vfprintf(f, fmt, args);
2458 }
2459 }
2460
2461
2462 int jio_printf(const char *fmt, ...) {
2463 int len;
2464 va_list args;
2465 va_start(args, fmt);
2466 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2467 va_end(args);
2468 return len;
2469 }
2470
2471
2472 // HotSpot specific jio method
2473 void jio_print(const char* s) {
2474 // Try to make this function as atomic as possible.
2475 if (Arguments::vfprintf_hook() != NULL) {
2476 jio_fprintf(defaultStream::output_stream(), "%s", s);
2477 } else {
2478 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2479 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2480 }
2481 }
2482
2483 } // Extern C
2484
2485 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2486
2487 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2488 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2489 // OSThread objects. The exception to this rule is when the target object is the thread
2490 // doing the operation, in which case we know that the thread won't exit until the
2491 // operation is done (all exits being voluntary). There are a few cases where it is
2492 // rather silly to do operations on yourself, like resuming yourself or asking whether
2493 // you are alive. While these can still happen, they are not subject to deadlocks if
2494 // the lock is held while the operation occurs (this is not the case for suspend, for
2495 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2496 // implementation is local to this file, we always lock Threads_lock for that one.
2497
2498 static void thread_entry(JavaThread* thread, TRAPS) {
2499 HandleMark hm(THREAD);
2500 Handle obj(THREAD, thread->threadObj());
2501 JavaValue result(T_VOID);
2502 JavaCalls::call_virtual(&result,
2503 obj,
2504 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2505 vmSymbolHandles::run_method_name(),
2506 vmSymbolHandles::void_method_signature(),
2507 THREAD);
2508 }
2509
2510
2511 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2512 JVMWrapper("JVM_StartThread");
2513 JavaThread *native_thread = NULL;
2514
2515 // We cannot hold the Threads_lock when we throw an exception,
2516 // due to rank ordering issues. Example: we might need to grab the
2517 // Heap_lock while we construct the exception.
2518 bool throw_illegal_thread_state = false;
2519
2520 // We must release the Threads_lock before we can post a jvmti event
2521 // in Thread::start.
2522 {
2523 // Ensure that the C++ Thread and OSThread structures aren't freed before
2524 // we operate.
2525 MutexLocker mu(Threads_lock);
2526
2527 // Check to see if we're running a thread that's already exited or was
2528 // stopped (is_stillborn) or is still active (thread is not NULL).
2529 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2530 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2531 throw_illegal_thread_state = true;
2532 } else {
2533 jlong size =
2534 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2535 // Allocate the C++ Thread structure and create the native thread. The
2536 // stack size retrieved from java is signed, but the constructor takes
2537 // size_t (an unsigned type), so avoid passing negative values which would
2538 // result in really large stacks.
2539 size_t sz = size > 0 ? (size_t) size : 0;
2540 native_thread = new JavaThread(&thread_entry, sz);
2541
2542 // At this point it may be possible that no osthread was created for the
2543 // JavaThread due to lack of memory. Check for this situation and throw
2544 // an exception if necessary. Eventually we may want to change this so
2545 // that we only grab the lock if the thread was created successfully -
2546 // then we can also do this check and throw the exception in the
2547 // JavaThread constructor.
2548 if (native_thread->osthread() != NULL) {
2549 // Note: the current thread is not being used within "prepare".
2550 native_thread->prepare(jthread);
2551 }
2552 }
2553 }
2554
2555 if (throw_illegal_thread_state) {
2556 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2557 }
2558
2559 assert(native_thread != NULL, "Starting null thread?");
2560
2561 if (native_thread->osthread() == NULL) {
2562 // No one should hold a reference to the 'native_thread'.
2563 delete native_thread;
2564 if (JvmtiExport::should_post_resource_exhausted()) {
2565 JvmtiExport::post_resource_exhausted(
2566 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2567 "unable to create new native thread");
2568 }
2569 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2570 "unable to create new native thread");
2571 }
2572
2573 Thread::start(native_thread);
2574
2575 JVM_END
2576
2577 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2578 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2579 // but is thought to be reliable and simple. In the case, where the receiver is the
2580 // save thread as the sender, no safepoint is needed.
2581 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2582 JVMWrapper("JVM_StopThread");
2583
2584 oop java_throwable = JNIHandles::resolve(throwable);
2585 if (java_throwable == NULL) {
2586 THROW(vmSymbols::java_lang_NullPointerException());
2587 }
2588 oop java_thread = JNIHandles::resolve_non_null(jthread);
2589 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2590 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2591 // First check if thread already exited
2592 if (receiver != NULL) {
2593 // Check if exception is getting thrown at self (use oop equality, since the
2594 // target object might exit)
2595 if (java_thread == thread->threadObj()) {
2596 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2597 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2598 // threads from being restarted.
2599 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2600 // any effect on the "liveness" of a thread; see
2601 // JVM_IsThreadAlive, below.
2602 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2603 java_lang_Thread::set_stillborn(java_thread);
2604 }
2605 THROW_OOP(java_throwable);
2606 } else {
2607 // Enques a VM_Operation to stop all threads and then deliver the exception...
2608 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2609 }
2610 }
2611 JVM_END
2612
2613
2614 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2615 JVMWrapper("JVM_IsThreadAlive");
2616
2617 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2618 return java_lang_Thread::is_alive(thread_oop);
2619 JVM_END
2620
2621
2622 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2623 JVMWrapper("JVM_SuspendThread");
2624 oop java_thread = JNIHandles::resolve_non_null(jthread);
2625 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2626
2627 if (receiver != NULL) {
2628 // thread has run and has not exited (still on threads list)
2629
2630 {
2631 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2632 if (receiver->is_external_suspend()) {
2633 // Don't allow nested external suspend requests. We can't return
2634 // an error from this interface so just ignore the problem.
2635 return;
2636 }
2637 if (receiver->is_exiting()) { // thread is in the process of exiting
2638 return;
2639 }
2640 receiver->set_external_suspend();
2641 }
2642
2643 // java_suspend() will catch threads in the process of exiting
2644 // and will ignore them.
2645 receiver->java_suspend();
2646
2647 // It would be nice to have the following assertion in all the
2648 // time, but it is possible for a racing resume request to have
2649 // resumed this thread right after we suspended it. Temporarily
2650 // enable this assertion if you are chasing a different kind of
2651 // bug.
2652 //
2653 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2654 // receiver->is_being_ext_suspended(), "thread is not suspended");
2655 }
2656 JVM_END
2657
2658
2659 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2660 JVMWrapper("JVM_ResumeThread");
2661 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2662 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2663 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2664 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2665 // looks at it.
2666 MutexLocker ml(Threads_lock);
2667 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2668 if (thr != NULL) {
2669 // the thread has run and is not in the process of exiting
2670 thr->java_resume();
2671 }
2672 JVM_END
2673
2674
2675 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2676 JVMWrapper("JVM_SetThreadPriority");
2677 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2678 MutexLocker ml(Threads_lock);
2679 oop java_thread = JNIHandles::resolve_non_null(jthread);
2680 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2681 JavaThread* thr = java_lang_Thread::thread(java_thread);
2682 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2683 Thread::set_priority(thr, (ThreadPriority)prio);
2684 }
2685 JVM_END
2686
2687
2688 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2689 JVMWrapper("JVM_Yield");
2690 if (os::dont_yield()) return;
2691 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2692 // Critical for similar threading behaviour
2693 if (ConvertYieldToSleep) {
2694 os::sleep(thread, MinSleepInterval, false);
2695 } else {
2696 os::yield();
2697 }
2698 JVM_END
2699
2700
2701 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2702 JVMWrapper("JVM_Sleep");
2703
2704 if (millis < 0) {
2705 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2706 }
2707
2708 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2709 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2710 }
2711
2712 // Save current thread state and restore it at the end of this block.
2713 // And set new thread state to SLEEPING.
2714 JavaThreadSleepState jtss(thread);
2715
2716 if (millis == 0) {
2717 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2718 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2719 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2720 // for SOLARIS
2721 if (ConvertSleepToYield) {
2722 os::yield();
2723 } else {
2724 ThreadState old_state = thread->osthread()->get_state();
2725 thread->osthread()->set_state(SLEEPING);
2726 os::sleep(thread, MinSleepInterval, false);
2727 thread->osthread()->set_state(old_state);
2728 }
2729 } else {
2730 ThreadState old_state = thread->osthread()->get_state();
2731 thread->osthread()->set_state(SLEEPING);
2732 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2733 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2734 // us while we were sleeping. We do not overwrite those.
2735 if (!HAS_PENDING_EXCEPTION) {
2736 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2737 // to properly restore the thread state. That's likely wrong.
2738 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2739 }
2740 }
2741 thread->osthread()->set_state(old_state);
2742 }
2743 JVM_END
2744
2745 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2746 JVMWrapper("JVM_CurrentThread");
2747 oop jthread = thread->threadObj();
2748 assert (thread != NULL, "no current thread!");
2749 return JNIHandles::make_local(env, jthread);
2750 JVM_END
2751
2752
2753 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2754 JVMWrapper("JVM_CountStackFrames");
2755
2756 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2757 oop java_thread = JNIHandles::resolve_non_null(jthread);
2758 bool throw_illegal_thread_state = false;
2759 int count = 0;
2760
2761 {
2762 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2763 // We need to re-resolve the java_thread, since a GC might have happened during the
2764 // acquire of the lock
2765 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2766
2767 if (thr == NULL) {
2768 // do nothing
2769 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2770 // Check whether this java thread has been suspended already. If not, throws
2771 // IllegalThreadStateException. We defer to throw that exception until
2772 // Threads_lock is released since loading exception class has to leave VM.
2773 // The correct way to test a thread is actually suspended is
2774 // wait_for_ext_suspend_completion(), but we can't call that while holding
2775 // the Threads_lock. The above tests are sufficient for our purposes
2776 // provided the walkability of the stack is stable - which it isn't
2777 // 100% but close enough for most practical purposes.
2778 throw_illegal_thread_state = true;
2779 } else {
2780 // Count all java activation, i.e., number of vframes
2781 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2782 // Native frames are not counted
2783 if (!vfst.method()->is_native()) count++;
2784 }
2785 }
2786 }
2787
2788 if (throw_illegal_thread_state) {
2789 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2790 "this thread is not suspended");
2791 }
2792 return count;
2793 JVM_END
2794
2795 // Consider: A better way to implement JVM_Interrupt() is to acquire
2796 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2797 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2798 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2799 // outside the critical section. Threads_lock is hot so we want to minimize
2800 // the hold-time. A cleaner interface would be to decompose interrupt into
2801 // two steps. The 1st phase, performed under Threads_lock, would return
2802 // a closure that'd be invoked after Threads_lock was dropped.
2803 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2804 // admit spurious wakeups.
2805
2806 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2807 JVMWrapper("JVM_Interrupt");
2808
2809 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2810 oop java_thread = JNIHandles::resolve_non_null(jthread);
2811 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2812 // We need to re-resolve the java_thread, since a GC might have happened during the
2813 // acquire of the lock
2814 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2815 if (thr != NULL) {
2816 Thread::interrupt(thr);
2817 }
2818 JVM_END
2819
2820
2821 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2822 JVMWrapper("JVM_IsInterrupted");
2823
2824 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2825 oop java_thread = JNIHandles::resolve_non_null(jthread);
2826 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2827 // We need to re-resolve the java_thread, since a GC might have happened during the
2828 // acquire of the lock
2829 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2830 if (thr == NULL) {
2831 return JNI_FALSE;
2832 } else {
2833 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2834 }
2835 JVM_END
2836
2837
2838 // Return true iff the current thread has locked the object passed in
2839
2840 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2841 JVMWrapper("JVM_HoldsLock");
2842 assert(THREAD->is_Java_thread(), "sanity check");
2843 if (obj == NULL) {
2844 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2845 }
2846 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2847 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2848 JVM_END
2849
2850
2851 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2852 JVMWrapper("JVM_DumpAllStacks");
2853 VM_PrintThreads op;
2854 VMThread::execute(&op);
2855 if (JvmtiExport::should_post_data_dump()) {
2856 JvmtiExport::post_data_dump();
2857 }
2858 JVM_END
2859
2860
2861 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2862
2863 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2864 assert(jthread->is_Java_thread(), "must be a Java thread");
2865 if (jthread->privileged_stack_top() == NULL) return false;
2866 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2867 oop loader = jthread->privileged_stack_top()->class_loader();
2868 if (loader == NULL) return true;
2869 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2870 if (trusted) return true;
2871 }
2872 return false;
2873 }
2874
2875 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2876 JVMWrapper("JVM_CurrentLoadedClass");
2877 ResourceMark rm(THREAD);
2878
2879 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2880 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2881 bool trusted = is_trusted_frame(thread, &vfst);
2882 if (trusted) return NULL;
2883
2884 methodOop m = vfst.method();
2885 if (!m->is_native()) {
2886 klassOop holder = m->method_holder();
2887 oop loader = instanceKlass::cast(holder)->class_loader();
2888 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2889 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2890 }
2891 }
2892 }
2893 return NULL;
2894 JVM_END
2895
2896
2897 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2898 JVMWrapper("JVM_CurrentClassLoader");
2899 ResourceMark rm(THREAD);
2900
2901 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2902
2903 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2904 bool trusted = is_trusted_frame(thread, &vfst);
2905 if (trusted) return NULL;
2906
2907 methodOop m = vfst.method();
2908 if (!m->is_native()) {
2909 klassOop holder = m->method_holder();
2910 assert(holder->is_klass(), "just checking");
2911 oop loader = instanceKlass::cast(holder)->class_loader();
2912 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2913 return JNIHandles::make_local(env, loader);
2914 }
2915 }
2916 }
2917 return NULL;
2918 JVM_END
2919
2920
2921 // Utility object for collecting method holders walking down the stack
2922 class KlassLink: public ResourceObj {
2923 public:
2924 KlassHandle klass;
2925 KlassLink* next;
2926
2927 KlassLink(KlassHandle k) { klass = k; next = NULL; }
2928 };
2929
2930
2931 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
2932 JVMWrapper("JVM_GetClassContext");
2933 ResourceMark rm(THREAD);
2934 JvmtiVMObjectAllocEventCollector oam;
2935 // Collect linked list of (handles to) method holders
2936 KlassLink* first = NULL;
2937 KlassLink* last = NULL;
2938 int depth = 0;
2939
2940 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
2941 // Native frames are not returned
2942 if (!vfst.method()->is_native()) {
2943 klassOop holder = vfst.method()->method_holder();
2944 assert(holder->is_klass(), "just checking");
2945 depth++;
2946 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
2947 if (first == NULL) {
2948 first = last = l;
2949 } else {
2950 last->next = l;
2951 last = l;
2952 }
2953 }
2954 }
2955
2956 // Create result array of type [Ljava/lang/Class;
2957 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
2958 // Fill in mirrors corresponding to method holders
2959 int index = 0;
2960 while (first != NULL) {
2961 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
2962 first = first->next;
2963 }
2964 assert(index == depth, "just checking");
2965
2966 return (jobjectArray) JNIHandles::make_local(env, result);
2967 JVM_END
2968
2969
2970 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
2971 JVMWrapper("JVM_ClassDepth");
2972 ResourceMark rm(THREAD);
2973 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
2974 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
2975
2976 const char* str = java_lang_String::as_utf8_string(class_name_str());
2977 symbolHandle class_name_sym =
2978 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
2979 if (class_name_sym.is_null()) {
2980 return -1;
2981 }
2982
2983 int depth = 0;
2984
2985 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2986 if (!vfst.method()->is_native()) {
2987 klassOop holder = vfst.method()->method_holder();
2988 assert(holder->is_klass(), "just checking");
2989 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
2990 return depth;
2991 }
2992 depth++;
2993 }
2994 }
2995 return -1;
2996 JVM_END
2997
2998
2999 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3000 JVMWrapper("JVM_ClassLoaderDepth");
3001 ResourceMark rm(THREAD);
3002 int depth = 0;
3003 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3004 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3005 bool trusted = is_trusted_frame(thread, &vfst);
3006 if (trusted) return -1;
3007
3008 methodOop m = vfst.method();
3009 if (!m->is_native()) {
3010 klassOop holder = m->method_holder();
3011 assert(holder->is_klass(), "just checking");
3012 oop loader = instanceKlass::cast(holder)->class_loader();
3013 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3014 return depth;
3015 }
3016 depth++;
3017 }
3018 }
3019 return -1;
3020 JVM_END
3021
3022
3023 // java.lang.Package ////////////////////////////////////////////////////////////////
3024
3025
3026 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3027 JVMWrapper("JVM_GetSystemPackage");
3028 ResourceMark rm(THREAD);
3029 JvmtiVMObjectAllocEventCollector oam;
3030 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3031 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3032 return (jstring) JNIHandles::make_local(result);
3033 JVM_END
3034
3035
3036 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3037 JVMWrapper("JVM_GetSystemPackages");
3038 JvmtiVMObjectAllocEventCollector oam;
3039 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3040 return (jobjectArray) JNIHandles::make_local(result);
3041 JVM_END
3042
3043
3044 // ObjectInputStream ///////////////////////////////////////////////////////////////
3045
3046 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3047 if (current_class == NULL) {
3048 return true;
3049 }
3050 if ((current_class == field_class) || access.is_public()) {
3051 return true;
3052 }
3053
3054 if (access.is_protected()) {
3055 // See if current_class is a subclass of field_class
3056 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3057 return true;
3058 }
3059 }
3060
3061 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3062 }
3063
3064
3065 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3066 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3067 JVMWrapper("JVM_AllocateNewObject");
3068 JvmtiVMObjectAllocEventCollector oam;
3069 // Receiver is not used
3070 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3071 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3072
3073 // Cannot instantiate primitive types
3074 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3075 ResourceMark rm(THREAD);
3076 THROW_0(vmSymbols::java_lang_InvalidClassException());
3077 }
3078
3079 // Arrays not allowed here, must use JVM_AllocateNewArray
3080 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3081 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3082 ResourceMark rm(THREAD);
3083 THROW_0(vmSymbols::java_lang_InvalidClassException());
3084 }
3085
3086 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3087 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3088
3089 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3090
3091 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3092 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3093
3094 // Make sure klass is initialized, since we are about to instantiate one of them.
3095 curr_klass->initialize(CHECK_NULL);
3096
3097 methodHandle m (THREAD,
3098 init_klass->find_method(vmSymbols::object_initializer_name(),
3099 vmSymbols::void_method_signature()));
3100 if (m.is_null()) {
3101 ResourceMark rm(THREAD);
3102 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3103 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3104 vmSymbols::object_initializer_name(),
3105 vmSymbols::void_method_signature()));
3106 }
3107
3108 if (curr_klass == init_klass && !m->is_public()) {
3109 // Calling the constructor for class 'curr_klass'.
3110 // Only allow calls to a public no-arg constructor.
3111 // This path corresponds to creating an Externalizable object.
3112 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3113 }
3114
3115 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3116 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3117 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3118 }
3119
3120 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3121 // Call constructor m. This might call a constructor higher up in the hierachy
3122 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3123
3124 return JNIHandles::make_local(obj());
3125 JVM_END
3126
3127
3128 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3129 JVMWrapper("JVM_AllocateNewArray");
3130 JvmtiVMObjectAllocEventCollector oam;
3131 oop mirror = JNIHandles::resolve_non_null(currClass);
3132
3133 if (java_lang_Class::is_primitive(mirror)) {
3134 THROW_0(vmSymbols::java_lang_InvalidClassException());
3135 }
3136 klassOop k = java_lang_Class::as_klassOop(mirror);
3137 oop result;
3138
3139 if (k->klass_part()->oop_is_typeArray()) {
3140 // typeArray
3141 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3142 } else if (k->klass_part()->oop_is_objArray()) {
3143 // objArray
3144 objArrayKlassHandle oak(THREAD, k);
3145 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3146 result = oak->allocate(length, CHECK_NULL);
3147 } else {
3148 THROW_0(vmSymbols::java_lang_InvalidClassException());
3149 }
3150 return JNIHandles::make_local(env, result);
3151 JVM_END
3152
3153
3154 // Return the first non-null class loader up the execution stack, or null
3155 // if only code from the null class loader is on the stack.
3156
3157 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3158 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3159 // UseNewReflection
3160 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3161 klassOop holder = vfst.method()->method_holder();
3162 oop loader = instanceKlass::cast(holder)->class_loader();
3163 if (loader != NULL) {
3164 return JNIHandles::make_local(env, loader);
3165 }
3166 }
3167 return NULL;
3168 JVM_END
3169
3170
3171 // Load a class relative to the most recent class on the stack with a non-null
3172 // classloader.
3173 // This function has been deprecated and should not be considered part of the
3174 // specified JVM interface.
3175
3176 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3177 jclass currClass, jstring currClassName))
3178 JVMWrapper("JVM_LoadClass0");
3179 // Receiver is not used
3180 ResourceMark rm(THREAD);
3181
3182 // Class name argument is not guaranteed to be in internal format
3183 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3184 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3185
3186 const char* str = java_lang_String::as_utf8_string(string());
3187
3188 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3189 // It's impossible to create this class; the name cannot fit
3190 // into the constant pool.
3191 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3192 }
3193
3194 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3195 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3196 // Find the most recent class on the stack with a non-null classloader
3197 oop loader = NULL;
3198 oop protection_domain = NULL;
3199 if (curr_klass.is_null()) {
3200 for (vframeStream vfst(thread);
3201 !vfst.at_end() && loader == NULL;
3202 vfst.next()) {
3203 if (!vfst.method()->is_native()) {
3204 klassOop holder = vfst.method()->method_holder();
3205 loader = instanceKlass::cast(holder)->class_loader();
3206 protection_domain = instanceKlass::cast(holder)->protection_domain();
3207 }
3208 }
3209 } else {
3210 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3211 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3212 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3213 }
3214 Handle h_loader(THREAD, loader);
3215 Handle h_prot (THREAD, protection_domain);
3216 return find_class_from_class_loader(env, name, true, h_loader, h_prot,
3217 false, thread);
3218 JVM_END
3219
3220
3221 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3222
3223
3224 // resolve array handle and check arguments
3225 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3226 if (arr == NULL) {
3227 THROW_0(vmSymbols::java_lang_NullPointerException());
3228 }
3229 oop a = JNIHandles::resolve_non_null(arr);
3230 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3231 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3232 }
3233 return arrayOop(a);
3234 }
3235
3236
3237 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3238 JVMWrapper("JVM_GetArrayLength");
3239 arrayOop a = check_array(env, arr, false, CHECK_0);
3240 return a->length();
3241 JVM_END
3242
3243
3244 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3245 JVMWrapper("JVM_Array_Get");
3246 JvmtiVMObjectAllocEventCollector oam;
3247 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3248 jvalue value;
3249 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3250 oop box = Reflection::box(&value, type, CHECK_NULL);
3251 return JNIHandles::make_local(env, box);
3252 JVM_END
3253
3254
3255 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3256 JVMWrapper("JVM_GetPrimitiveArrayElement");
3257 jvalue value;
3258 value.i = 0; // to initialize value before getting used in CHECK
3259 arrayOop a = check_array(env, arr, true, CHECK_(value));
3260 assert(a->is_typeArray(), "just checking");
3261 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3262 BasicType wide_type = (BasicType) wCode;
3263 if (type != wide_type) {
3264 Reflection::widen(&value, type, wide_type, CHECK_(value));
3265 }
3266 return value;
3267 JVM_END
3268
3269
3270 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3271 JVMWrapper("JVM_SetArrayElement");
3272 arrayOop a = check_array(env, arr, false, CHECK);
3273 oop box = JNIHandles::resolve(val);
3274 jvalue value;
3275 value.i = 0; // to initialize value before getting used in CHECK
3276 BasicType value_type;
3277 if (a->is_objArray()) {
3278 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3279 value_type = Reflection::unbox_for_regular_object(box, &value);
3280 } else {
3281 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3282 }
3283 Reflection::array_set(&value, a, index, value_type, CHECK);
3284 JVM_END
3285
3286
3287 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3288 JVMWrapper("JVM_SetPrimitiveArrayElement");
3289 arrayOop a = check_array(env, arr, true, CHECK);
3290 assert(a->is_typeArray(), "just checking");
3291 BasicType value_type = (BasicType) vCode;
3292 Reflection::array_set(&v, a, index, value_type, CHECK);
3293 JVM_END
3294
3295
3296 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3297 JVMWrapper("JVM_NewArray");
3298 JvmtiVMObjectAllocEventCollector oam;
3299 oop element_mirror = JNIHandles::resolve(eltClass);
3300 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3301 return JNIHandles::make_local(env, result);
3302 JVM_END
3303
3304
3305 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3306 JVMWrapper("JVM_NewMultiArray");
3307 JvmtiVMObjectAllocEventCollector oam;
3308 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3309 oop element_mirror = JNIHandles::resolve(eltClass);
3310 assert(dim_array->is_typeArray(), "just checking");
3311 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3312 return JNIHandles::make_local(env, result);
3313 JVM_END
3314
3315
3316 // Networking library support ////////////////////////////////////////////////////////////////////
3317
3318 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3319 JVMWrapper("JVM_InitializeSocketLibrary");
3320 return hpi::initialize_socket_library();
3321 JVM_END
3322
3323
3324 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3325 JVMWrapper("JVM_Socket");
3326 return hpi::socket(domain, type, protocol);
3327 JVM_END
3328
3329
3330 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3331 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3332 //%note jvm_r6
3333 return hpi::socket_close(fd);
3334 JVM_END
3335
3336
3337 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3338 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3339 //%note jvm_r6
3340 return hpi::socket_shutdown(fd, howto);
3341 JVM_END
3342
3343
3344 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3345 JVMWrapper2("JVM_Recv (0x%x)", fd);
3346 //%note jvm_r6
3347 return hpi::recv(fd, buf, nBytes, flags);
3348 JVM_END
3349
3350
3351 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3352 JVMWrapper2("JVM_Send (0x%x)", fd);
3353 //%note jvm_r6
3354 return hpi::send(fd, buf, nBytes, flags);
3355 JVM_END
3356
3357
3358 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3359 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3360 //%note jvm_r6
3361 return hpi::timeout(fd, timeout);
3362 JVM_END
3363
3364
3365 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3366 JVMWrapper2("JVM_Listen (0x%x)", fd);
3367 //%note jvm_r6
3368 return hpi::listen(fd, count);
3369 JVM_END
3370
3371
3372 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3373 JVMWrapper2("JVM_Connect (0x%x)", fd);
3374 //%note jvm_r6
3375 return hpi::connect(fd, him, len);
3376 JVM_END
3377
3378
3379 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3380 JVMWrapper2("JVM_Bind (0x%x)", fd);
3381 //%note jvm_r6
3382 return hpi::bind(fd, him, len);
3383 JVM_END
3384
3385
3386 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3387 JVMWrapper2("JVM_Accept (0x%x)", fd);
3388 //%note jvm_r6
3389 return hpi::accept(fd, him, (int *)len);
3390 JVM_END
3391
3392
3393 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3394 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3395 //%note jvm_r6
3396 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3397 JVM_END
3398
3399
3400 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3401 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3402 //%note jvm_r6
3403 return hpi::get_sock_name(fd, him, len);
3404 JVM_END
3405
3406
3407 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3408 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3409 //%note jvm_r6
3410 return hpi::sendto(fd, buf, len, flags, to, tolen);
3411 JVM_END
3412
3413
3414 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3415 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3416 //%note jvm_r6
3417 return hpi::socket_available(fd, pbytes);
3418 JVM_END
3419
3420
3421 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3422 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3423 //%note jvm_r6
3424 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3425 JVM_END
3426
3427
3428 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3429 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3430 //%note jvm_r6
3431 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3432 JVM_END
3433
3434 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3435 JVMWrapper("JVM_GetHostName");
3436 return hpi::get_host_name(name, namelen);
3437 JVM_END
3438
3439 #ifdef _WINDOWS
3440
3441 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3442 JVMWrapper("JVM_GetHostByAddr");
3443 return hpi::get_host_by_addr(name, len, type);
3444 JVM_END
3445
3446
3447 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3448 JVMWrapper("JVM_GetHostByName");
3449 return hpi::get_host_by_name(name);
3450 JVM_END
3451
3452
3453 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3454 JVMWrapper("JVM_GetProtoByName");
3455 return hpi::get_proto_by_name(name);
3456 JVM_END
3457
3458 #endif
3459
3460 // Library support ///////////////////////////////////////////////////////////////////////////
3461
3462 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3463 //%note jvm_ct
3464 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3465 char ebuf[1024];
3466 void *load_result;
3467 {
3468 ThreadToNativeFromVM ttnfvm(thread);
3469 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3470 }
3471 if (load_result == NULL) {
3472 char msg[1024];
3473 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3474 // Since 'ebuf' may contain a string encoded using
3475 // platform encoding scheme, we need to pass
3476 // Exceptions::unsafe_to_utf8 to the new_exception method
3477 // as the last argument. See bug 6367357.
3478 Handle h_exception =
3479 Exceptions::new_exception(thread,
3480 vmSymbols::java_lang_UnsatisfiedLinkError(),
3481 msg, Exceptions::unsafe_to_utf8);
3482
3483 THROW_HANDLE_0(h_exception);
3484 }
3485 return load_result;
3486 JVM_END
3487
3488
3489 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3490 JVMWrapper("JVM_UnloadLibrary");
3491 hpi::dll_unload(handle);
3492 JVM_END
3493
3494
3495 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3496 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3497 return hpi::dll_lookup(handle, name);
3498 JVM_END
3499
3500 // Floating point support ////////////////////////////////////////////////////////////////////
3501
3502 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3503 JVMWrapper("JVM_IsNaN");
3504 return g_isnan(a);
3505 JVM_END
3506
3507
3508
3509 // JNI version ///////////////////////////////////////////////////////////////////////////////
3510
3511 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3512 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3513 return Threads::is_supported_jni_version_including_1_1(version);
3514 JVM_END
3515
3516
3517 // String support ///////////////////////////////////////////////////////////////////////////
3518
3519 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3520 JVMWrapper("JVM_InternString");
3521 JvmtiVMObjectAllocEventCollector oam;
3522 if (str == NULL) return NULL;
3523 oop string = JNIHandles::resolve_non_null(str);
3524 oop result = StringTable::intern(string, CHECK_NULL);
3525 return (jstring) JNIHandles::make_local(env, result);
3526 JVM_END
3527
3528
3529 // Raw monitor support //////////////////////////////////////////////////////////////////////
3530
3531 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3532 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3533 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3534 // that only works with java threads.
3535
3536
3537 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3538 VM_Exit::block_if_vm_exited();
3539 JVMWrapper("JVM_RawMonitorCreate");
3540 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3541 }
3542
3543
3544 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3545 VM_Exit::block_if_vm_exited();
3546 JVMWrapper("JVM_RawMonitorDestroy");
3547 delete ((Mutex*) mon);
3548 }
3549
3550
3551 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3552 VM_Exit::block_if_vm_exited();
3553 JVMWrapper("JVM_RawMonitorEnter");
3554 ((Mutex*) mon)->jvm_raw_lock();
3555 return 0;
3556 }
3557
3558
3559 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3560 VM_Exit::block_if_vm_exited();
3561 JVMWrapper("JVM_RawMonitorExit");
3562 ((Mutex*) mon)->jvm_raw_unlock();
3563 }
3564
3565
3566 // Support for Serialization
3567
3568 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3569 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3570 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3571 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3572
3573 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3574 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3575 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3576 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3577
3578
3579 void initialize_converter_functions() {
3580 if (JDK_Version::is_gte_jdk14x_version()) {
3581 // These functions only exist for compatibility with 1.3.1 and earlier
3582 return;
3583 }
3584
3585 // called from universe_post_init()
3586 assert(
3587 int_bits_to_float_fn == NULL &&
3588 long_bits_to_double_fn == NULL &&
3589 float_to_int_bits_fn == NULL &&
3590 double_to_long_bits_fn == NULL ,
3591 "initialization done twice"
3592 );
3593 // initialize
3594 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3595 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3596 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3597 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3598 // verify
3599 assert(
3600 int_bits_to_float_fn != NULL &&
3601 long_bits_to_double_fn != NULL &&
3602 float_to_int_bits_fn != NULL &&
3603 double_to_long_bits_fn != NULL ,
3604 "initialization failed"
3605 );
3606 }
3607
3608
3609 // Serialization
3610 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3611 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3612 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3613
3614 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3615 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3616 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3617 oop o = JNIHandles::resolve(obj);
3618
3619 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3620 THROW(vmSymbols::java_lang_NullPointerException());
3621 }
3622
3623 jsize nfids = fids->length();
3624 if (nfids == 0) return;
3625
3626 if (tcodes->length() < nfids) {
3627 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3628 }
3629
3630 jsize off = 0;
3631 /* loop through fields, setting values */
3632 for (jsize i = 0; i < nfids; i++) {
3633 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3634 int field_offset;
3635 if (fid != NULL) {
3636 // NULL is a legal value for fid, but retrieving the field offset
3637 // trigger assertion in that case
3638 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3639 }
3640
3641 switch (tcodes->char_at(i)) {
3642 case 'Z':
3643 if (fid != NULL) {
3644 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3645 o->bool_field_put(field_offset, val);
3646 }
3647 off++;
3648 break;
3649
3650 case 'B':
3651 if (fid != NULL) {
3652 o->byte_field_put(field_offset, dbuf->byte_at(off));
3653 }
3654 off++;
3655 break;
3656
3657 case 'C':
3658 if (fid != NULL) {
3659 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3660 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3661 o->char_field_put(field_offset, val);
3662 }
3663 off += 2;
3664 break;
3665
3666 case 'S':
3667 if (fid != NULL) {
3668 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3669 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3670 o->short_field_put(field_offset, val);
3671 }
3672 off += 2;
3673 break;
3674
3675 case 'I':
3676 if (fid != NULL) {
3677 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3678 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3679 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3680 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3681 o->int_field_put(field_offset, ival);
3682 }
3683 off += 4;
3684 break;
3685
3686 case 'F':
3687 if (fid != NULL) {
3688 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3689 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3690 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3691 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3692 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3693 o->float_field_put(field_offset, fval);
3694 }
3695 off += 4;
3696 break;
3697
3698 case 'J':
3699 if (fid != NULL) {
3700 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3701 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3702 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3703 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3704 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3705 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3706 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3707 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3708 o->long_field_put(field_offset, lval);
3709 }
3710 off += 8;
3711 break;
3712
3713 case 'D':
3714 if (fid != NULL) {
3715 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3716 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3717 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3718 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3719 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3720 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3721 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3722 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3723 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3724 o->double_field_put(field_offset, dval);
3725 }
3726 off += 8;
3727 break;
3728
3729 default:
3730 // Illegal typecode
3731 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3732 }
3733 }
3734 JVM_END
3735
3736
3737 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3738 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3739 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3740
3741 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3742 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3743 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3744 oop o = JNIHandles::resolve(obj);
3745
3746 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3747 THROW(vmSymbols::java_lang_NullPointerException());
3748 }
3749
3750 jsize nfids = fids->length();
3751 if (nfids == 0) return;
3752
3753 if (tcodes->length() < nfids) {
3754 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3755 }
3756
3757 /* loop through fields, fetching values */
3758 jsize off = 0;
3759 for (jsize i = 0; i < nfids; i++) {
3760 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3761 if (fid == NULL) {
3762 THROW(vmSymbols::java_lang_NullPointerException());
3763 }
3764 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3765
3766 switch (tcodes->char_at(i)) {
3767 case 'Z':
3768 {
3769 jboolean val = o->bool_field(field_offset);
3770 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3771 }
3772 break;
3773
3774 case 'B':
3775 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3776 break;
3777
3778 case 'C':
3779 {
3780 jchar val = o->char_field(field_offset);
3781 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3782 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3783 }
3784 break;
3785
3786 case 'S':
3787 {
3788 jshort val = o->short_field(field_offset);
3789 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3790 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3791 }
3792 break;
3793
3794 case 'I':
3795 {
3796 jint val = o->int_field(field_offset);
3797 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3798 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3799 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3800 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3801 }
3802 break;
3803
3804 case 'F':
3805 {
3806 jfloat fval = o->float_field(field_offset);
3807 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3808 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3809 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3810 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3811 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3812 }
3813 break;
3814
3815 case 'J':
3816 {
3817 jlong val = o->long_field(field_offset);
3818 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3819 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3820 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3821 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3822 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3823 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3824 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3825 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3826 }
3827 break;
3828
3829 case 'D':
3830 {
3831 jdouble dval = o->double_field(field_offset);
3832 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3833 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3834 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3835 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3836 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3837 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3838 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3839 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3840 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3841 }
3842 break;
3843
3844 default:
3845 // Illegal typecode
3846 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3847 }
3848 }
3849 JVM_END
3850
3851
3852 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3853
3854 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3855 // Security Note:
3856 // The Java level wrapper will perform the necessary security check allowing
3857 // us to pass the NULL as the initiating class loader.
3858 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3859 KlassHandle klass_handle(THREAD, klass);
3860 // Check if we should initialize the class
3861 if (init && klass_handle->oop_is_instance()) {
3862 klass_handle->initialize(CHECK_NULL);
3863 }
3864 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3865 }
3866
3867
3868 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3869
3870 #ifndef PRODUCT
3871
3872 extern "C" {
3873 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3874 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3875 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3876 }
3877
3878 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3879 JVMWrapper("JVM_AccessBoolVMFlag");
3880 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3881 JVM_END
3882
3883 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3884 JVMWrapper("JVM_AccessVMIntFlag");
3885 intx v;
3886 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3887 *value = (jint)v;
3888 return result;
3889 JVM_END
3890
3891
3892 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3893 JVMWrapper("JVM_VMBreakPoint");
3894 oop the_obj = JNIHandles::resolve(obj);
3895 BREAKPOINT;
3896 JVM_END
3897
3898
3899 #endif
3900
3901
3902 //---------------------------------------------------------------------------
3903 //
3904 // Support for old native code-based reflection (pre-JDK 1.4)
3905 // Disabled by default in the product build.
3906 //
3907 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3908 //
3909 //---------------------------------------------------------------------------
3910
3911 #ifdef SUPPORT_OLD_REFLECTION
3912
3913 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
3914 JVMWrapper("JVM_GetClassFields");
3915 JvmtiVMObjectAllocEventCollector oam;
3916 oop mirror = JNIHandles::resolve_non_null(cls);
3917 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
3918 return (jobjectArray) JNIHandles::make_local(env, result);
3919 JVM_END
3920
3921
3922 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
3923 JVMWrapper("JVM_GetClassMethods");
3924 JvmtiVMObjectAllocEventCollector oam;
3925 oop mirror = JNIHandles::resolve_non_null(cls);
3926 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
3927 //%note jvm_r4
3928 return (jobjectArray) JNIHandles::make_local(env, result);
3929 JVM_END
3930
3931
3932 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
3933 JVMWrapper("JVM_GetClassConstructors");
3934 JvmtiVMObjectAllocEventCollector oam;
3935 oop mirror = JNIHandles::resolve_non_null(cls);
3936 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
3937 //%note jvm_r4
3938 return (jobjectArray) JNIHandles::make_local(env, result);
3939 JVM_END
3940
3941
3942 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
3943 JVMWrapper("JVM_GetClassField");
3944 JvmtiVMObjectAllocEventCollector oam;
3945 if (name == NULL) return NULL;
3946 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3947
3948 const char* cstr = java_lang_String::as_utf8_string(str());
3949 symbolHandle field_name =
3950 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3951 if (field_name.is_null()) {
3952 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3953 }
3954
3955 oop mirror = JNIHandles::resolve_non_null(cls);
3956 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
3957 if (result == NULL) {
3958 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3959 }
3960 return JNIHandles::make_local(env, result);
3961 JVM_END
3962
3963
3964 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
3965 JVMWrapper("JVM_GetClassMethod");
3966 JvmtiVMObjectAllocEventCollector oam;
3967 if (name == NULL) {
3968 THROW_0(vmSymbols::java_lang_NullPointerException());
3969 }
3970 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3971
3972 const char* cstr = java_lang_String::as_utf8_string(str());
3973 symbolHandle method_name =
3974 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3975 if (method_name.is_null()) {
3976 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3977 }
3978
3979 oop mirror = JNIHandles::resolve_non_null(cls);
3980 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3981 oop result = Reflection::reflect_method(mirror, method_name, tarray,
3982 which, CHECK_NULL);
3983 if (result == NULL) {
3984 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3985 }
3986 return JNIHandles::make_local(env, result);
3987 JVM_END
3988
3989
3990 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
3991 JVMWrapper("JVM_GetClassConstructor");
3992 JvmtiVMObjectAllocEventCollector oam;
3993 oop mirror = JNIHandles::resolve_non_null(cls);
3994 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3995 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
3996 if (result == NULL) {
3997 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3998 }
3999 return (jobject) JNIHandles::make_local(env, result);
4000 JVM_END
4001
4002
4003 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4004
4005 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4006 JVMWrapper("JVM_NewInstance");
4007 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4008
4009 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4010 if (resolved_constructor == NULL) {
4011 klassOop k = java_lang_Class::as_klassOop(mirror());
4012 // The java.lang.Class object caches a resolved constructor if all the checks
4013 // below were done successfully and a constructor was found.
4014
4015 // Do class based checks
4016 if (java_lang_Class::is_primitive(mirror())) {
4017 const char* msg = "";
4018 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4019 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4020 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4021 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4022 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4023 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4024 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4025 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4026 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4027 }
4028
4029 // Check whether we are allowed to instantiate this class
4030 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4031 instanceKlassHandle klass(THREAD, k);
4032 // Make sure class is initialized (also so all methods are rewritten)
4033 klass->initialize(CHECK_NULL);
4034
4035 // Lookup default constructor
4036 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4037 if (resolved_constructor == NULL) {
4038 ResourceMark rm(THREAD);
4039 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4040 }
4041
4042 // Cache result in java.lang.Class object. Does not have to be MT safe.
4043 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4044 }
4045
4046 assert(resolved_constructor != NULL, "sanity check");
4047 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4048
4049 // We have an initialized instanceKlass with a default constructor
4050 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4051 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4052
4053 // Do security check
4054 klassOop caller_klass = NULL;
4055 if (UsePrivilegedStack) {
4056 caller_klass = thread->security_get_caller_class(2);
4057
4058 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4059 !Reflection::verify_field_access(caller_klass,
4060 klass(),
4061 klass(),
4062 constructor->access_flags(),
4063 false,
4064 true)) {
4065 ResourceMark rm(THREAD);
4066 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4067 }
4068 }
4069
4070 // Allocate object and call constructor
4071 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4072 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4073
4074 jobject res = JNIHandles::make_local(env, receiver());
4075 if (JvmtiExport::should_post_vm_object_alloc()) {
4076 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4077 }
4078 return res;
4079 JVM_END
4080
4081
4082 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4083
4084 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4085 JVMWrapper("JVM_GetField");
4086 JvmtiVMObjectAllocEventCollector oam;
4087 Handle field_mirror(thread, JNIHandles::resolve(field));
4088 Handle receiver (thread, JNIHandles::resolve(obj));
4089 fieldDescriptor fd;
4090 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4091 jvalue value;
4092 BasicType type = Reflection::field_get(&value, &fd, receiver);
4093 oop box = Reflection::box(&value, type, CHECK_NULL);
4094 return JNIHandles::make_local(env, box);
4095 JVM_END
4096
4097
4098 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4099 JVMWrapper("JVM_GetPrimitiveField");
4100 Handle field_mirror(thread, JNIHandles::resolve(field));
4101 Handle receiver (thread, JNIHandles::resolve(obj));
4102 fieldDescriptor fd;
4103 jvalue value;
4104 value.j = 0;
4105 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4106 BasicType type = Reflection::field_get(&value, &fd, receiver);
4107 BasicType wide_type = (BasicType) wCode;
4108 if (type != wide_type) {
4109 Reflection::widen(&value, type, wide_type, CHECK_(value));
4110 }
4111 return value;
4112 JVM_END // should really be JVM_END, but that doesn't work for union types!
4113
4114
4115 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4116 JVMWrapper("JVM_SetField");
4117 Handle field_mirror(thread, JNIHandles::resolve(field));
4118 Handle receiver (thread, JNIHandles::resolve(obj));
4119 oop box = JNIHandles::resolve(val);
4120 fieldDescriptor fd;
4121 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4122 BasicType field_type = fd.field_type();
4123 jvalue value;
4124 BasicType value_type;
4125 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4126 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4127 value_type = Reflection::unbox_for_regular_object(box, &value);
4128 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4129 } else {
4130 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4131 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4132 }
4133 JVM_END
4134
4135
4136 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4137 JVMWrapper("JVM_SetPrimitiveField");
4138 Handle field_mirror(thread, JNIHandles::resolve(field));
4139 Handle receiver (thread, JNIHandles::resolve(obj));
4140 fieldDescriptor fd;
4141 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4142 BasicType value_type = (BasicType) vCode;
4143 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4144 JVM_END
4145
4146
4147 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4148
4149 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4150 JVMWrapper("JVM_InvokeMethod");
4151 Handle method_handle;
4152 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4153 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4154 Handle receiver(THREAD, JNIHandles::resolve(obj));
4155 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4156 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4157 jobject res = JNIHandles::make_local(env, result);
4158 if (JvmtiExport::should_post_vm_object_alloc()) {
4159 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4160 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4161 if (java_lang_Class::is_primitive(ret_type)) {
4162 // Only for primitive type vm allocates memory for java object.
4163 // See box() method.
4164 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4165 }
4166 }
4167 return res;
4168 } else {
4169 THROW_0(vmSymbols::java_lang_StackOverflowError());
4170 }
4171 JVM_END
4172
4173
4174 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4175 JVMWrapper("JVM_NewInstanceFromConstructor");
4176 oop constructor_mirror = JNIHandles::resolve(c);
4177 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4178 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4179 jobject res = JNIHandles::make_local(env, result);
4180 if (JvmtiExport::should_post_vm_object_alloc()) {
4181 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4182 }
4183 return res;
4184 JVM_END
4185
4186 #endif /* SUPPORT_OLD_REFLECTION */
4187
4188 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4189
4190 JVM_LEAF(jboolean, JVM_SupportsCX8())
4191 JVMWrapper("JVM_SupportsCX8");
4192 return VM_Version::supports_cx8();
4193 JVM_END
4194
4195
4196 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4197 JVMWrapper("JVM_CX8Field");
4198 jlong res;
4199 oop o = JNIHandles::resolve(obj);
4200 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4201 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4202
4203 assert(VM_Version::supports_cx8(), "cx8 not supported");
4204 res = Atomic::cmpxchg(newVal, addr, oldVal);
4205
4206 return res == oldVal;
4207 JVM_END
4208
4209 // DTrace ///////////////////////////////////////////////////////////////////
4210
4211 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4212 JVMWrapper("JVM_DTraceGetVersion");
4213 return (jint)JVM_TRACING_DTRACE_VERSION;
4214 JVM_END
4215
4216 JVM_ENTRY(jlong,JVM_DTraceActivate(
4217 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4218 JVM_DTraceProvider* providers))
4219 JVMWrapper("JVM_DTraceActivate");
4220 return DTraceJSDT::activate(
4221 version, module_name, providers_count, providers, CHECK_0);
4222 JVM_END
4223
4224 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4225 JVMWrapper("JVM_DTraceIsProbeEnabled");
4226 return DTraceJSDT::is_probe_enabled(method);
4227 JVM_END
4228
4229 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4230 JVMWrapper("JVM_DTraceDispose");
4231 DTraceJSDT::dispose(handle);
4232 JVM_END
4233
4234 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4235 JVMWrapper("JVM_DTraceIsSupported");
4236 return DTraceJSDT::is_supported();
4237 JVM_END
4238
4239 // Returns an array of all live Thread objects (VM internal JavaThreads,
4240 // jvmti agent threads, and JNI attaching threads are skipped)
4241 // See CR 6404306 regarding JNI attaching threads
4242 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4243 ResourceMark rm(THREAD);
4244 ThreadsListEnumerator tle(THREAD, false, false);
4245 JvmtiVMObjectAllocEventCollector oam;
4246
4247 int num_threads = tle.num_threads();
4248 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4249 objArrayHandle threads_ah(THREAD, r);
4250
4251 for (int i = 0; i < num_threads; i++) {
4252 Handle h = tle.get_threadObj(i);
4253 threads_ah->obj_at_put(i, h());
4254 }
4255
4256 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4257 JVM_END
4258
4259
4260 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4261 // Return StackTraceElement[][], each element is the stack trace of a thread in
4262 // the corresponding entry in the given threads array
4263 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4264 JVMWrapper("JVM_DumpThreads");
4265 JvmtiVMObjectAllocEventCollector oam;
4266
4267 // Check if threads is null
4268 if (threads == NULL) {
4269 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4270 }
4271
4272 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4273 objArrayHandle ah(THREAD, a);
4274 int num_threads = ah->length();
4275 // check if threads is non-empty array
4276 if (num_threads == 0) {
4277 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4278 }
4279
4280 // check if threads is not an array of objects of Thread class
4281 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4282 if (k != SystemDictionary::thread_klass()) {
4283 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4284 }
4285
4286 ResourceMark rm(THREAD);
4287
4288 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4289 for (int i = 0; i < num_threads; i++) {
4290 oop thread_obj = ah->obj_at(i);
4291 instanceHandle h(THREAD, (instanceOop) thread_obj);
4292 thread_handle_array->append(h);
4293 }
4294
4295 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4296 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4297
4298 JVM_END
4299
4300 // JVM monitoring and management support
4301 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4302 return Management::get_jmm_interface(version);
4303 JVM_END
4304
4305 // com.sun.tools.attach.VirtualMachine agent properties support
4306 //
4307 // Initialize the agent properties with the properties maintained in the VM
4308 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4309 JVMWrapper("JVM_InitAgentProperties");
4310 ResourceMark rm;
4311
4312 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4313
4314 PUTPROP(props, "sun.java.command", Arguments::java_command());
4315 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4316 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4317 return properties;
4318 JVM_END
4319
4320 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4321 {
4322 JVMWrapper("JVM_GetEnclosingMethodInfo");
4323 JvmtiVMObjectAllocEventCollector oam;
4324
4325 if (ofClass == NULL) {
4326 return NULL;
4327 }
4328 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4329 // Special handling for primitive objects
4330 if (java_lang_Class::is_primitive(mirror())) {
4331 return NULL;
4332 }
4333 klassOop k = java_lang_Class::as_klassOop(mirror());
4334 if (!Klass::cast(k)->oop_is_instance()) {
4335 return NULL;
4336 }
4337 instanceKlassHandle ik_h(THREAD, k);
4338 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4339 if (encl_method_class_idx == 0) {
4340 return NULL;
4341 }
4342 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4343 objArrayHandle dest(THREAD, dest_o);
4344 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4345 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4346 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4347 if (encl_method_method_idx != 0) {
4348 symbolOop sym_o = ik_h->constants()->symbol_at(
4349 extract_low_short_from_int(
4350 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4351 symbolHandle sym(THREAD, sym_o);
4352 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4353 dest->obj_at_put(1, str());
4354 sym_o = ik_h->constants()->symbol_at(
4355 extract_high_short_from_int(
4356 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4357 sym = symbolHandle(THREAD, sym_o);
4358 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4359 dest->obj_at_put(2, str());
4360 }
4361 return (jobjectArray) JNIHandles::make_local(dest());
4362 }
4363 JVM_END
4364
4365 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4366 jint javaThreadState))
4367 {
4368 // If new thread states are added in future JDK and VM versions,
4369 // this should check if the JDK version is compatible with thread
4370 // states supported by the VM. Return NULL if not compatible.
4371 //
4372 // This function must map the VM java_lang_Thread::ThreadStatus
4373 // to the Java thread state that the JDK supports.
4374 //
4375
4376 typeArrayHandle values_h;
4377 switch (javaThreadState) {
4378 case JAVA_THREAD_STATE_NEW : {
4379 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4380 values_h = typeArrayHandle(THREAD, r);
4381 values_h->int_at_put(0, java_lang_Thread::NEW);
4382 break;
4383 }
4384 case JAVA_THREAD_STATE_RUNNABLE : {
4385 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4386 values_h = typeArrayHandle(THREAD, r);
4387 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4388 break;
4389 }
4390 case JAVA_THREAD_STATE_BLOCKED : {
4391 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4392 values_h = typeArrayHandle(THREAD, r);
4393 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4394 break;
4395 }
4396 case JAVA_THREAD_STATE_WAITING : {
4397 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4398 values_h = typeArrayHandle(THREAD, r);
4399 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4400 values_h->int_at_put(1, java_lang_Thread::PARKED);
4401 break;
4402 }
4403 case JAVA_THREAD_STATE_TIMED_WAITING : {
4404 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4405 values_h = typeArrayHandle(THREAD, r);
4406 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4407 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4408 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4409 break;
4410 }
4411 case JAVA_THREAD_STATE_TERMINATED : {
4412 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4413 values_h = typeArrayHandle(THREAD, r);
4414 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4415 break;
4416 }
4417 default:
4418 // Unknown state - probably incompatible JDK version
4419 return NULL;
4420 }
4421
4422 return (jintArray) JNIHandles::make_local(env, values_h());
4423 }
4424 JVM_END
4425
4426
4427 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4428 jint javaThreadState,
4429 jintArray values))
4430 {
4431 // If new thread states are added in future JDK and VM versions,
4432 // this should check if the JDK version is compatible with thread
4433 // states supported by the VM. Return NULL if not compatible.
4434 //
4435 // This function must map the VM java_lang_Thread::ThreadStatus
4436 // to the Java thread state that the JDK supports.
4437 //
4438
4439 ResourceMark rm;
4440
4441 // Check if threads is null
4442 if (values == NULL) {
4443 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4444 }
4445
4446 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4447 typeArrayHandle values_h(THREAD, v);
4448
4449 objArrayHandle names_h;
4450 switch (javaThreadState) {
4451 case JAVA_THREAD_STATE_NEW : {
4452 assert(values_h->length() == 1 &&
4453 values_h->int_at(0) == java_lang_Thread::NEW,
4454 "Invalid threadStatus value");
4455
4456 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4457 1, /* only 1 substate */
4458 CHECK_NULL);
4459 names_h = objArrayHandle(THREAD, r);
4460 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4461 names_h->obj_at_put(0, name());
4462 break;
4463 }
4464 case JAVA_THREAD_STATE_RUNNABLE : {
4465 assert(values_h->length() == 1 &&
4466 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4467 "Invalid threadStatus value");
4468
4469 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4470 1, /* only 1 substate */
4471 CHECK_NULL);
4472 names_h = objArrayHandle(THREAD, r);
4473 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4474 names_h->obj_at_put(0, name());
4475 break;
4476 }
4477 case JAVA_THREAD_STATE_BLOCKED : {
4478 assert(values_h->length() == 1 &&
4479 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4480 "Invalid threadStatus value");
4481
4482 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4483 1, /* only 1 substate */
4484 CHECK_NULL);
4485 names_h = objArrayHandle(THREAD, r);
4486 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4487 names_h->obj_at_put(0, name());
4488 break;
4489 }
4490 case JAVA_THREAD_STATE_WAITING : {
4491 assert(values_h->length() == 2 &&
4492 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4493 values_h->int_at(1) == java_lang_Thread::PARKED,
4494 "Invalid threadStatus value");
4495 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4496 2, /* number of substates */
4497 CHECK_NULL);
4498 names_h = objArrayHandle(THREAD, r);
4499 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4500 CHECK_NULL);
4501 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4502 CHECK_NULL);
4503 names_h->obj_at_put(0, name0());
4504 names_h->obj_at_put(1, name1());
4505 break;
4506 }
4507 case JAVA_THREAD_STATE_TIMED_WAITING : {
4508 assert(values_h->length() == 3 &&
4509 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4510 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4511 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4512 "Invalid threadStatus value");
4513 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4514 3, /* number of substates */
4515 CHECK_NULL);
4516 names_h = objArrayHandle(THREAD, r);
4517 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4518 CHECK_NULL);
4519 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4520 CHECK_NULL);
4521 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4522 CHECK_NULL);
4523 names_h->obj_at_put(0, name0());
4524 names_h->obj_at_put(1, name1());
4525 names_h->obj_at_put(2, name2());
4526 break;
4527 }
4528 case JAVA_THREAD_STATE_TERMINATED : {
4529 assert(values_h->length() == 1 &&
4530 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4531 "Invalid threadStatus value");
4532 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4533 1, /* only 1 substate */
4534 CHECK_NULL);
4535 names_h = objArrayHandle(THREAD, r);
4536 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4537 names_h->obj_at_put(0, name());
4538 break;
4539 }
4540 default:
4541 // Unknown state - probably incompatible JDK version
4542 return NULL;
4543 }
4544 return (jobjectArray) JNIHandles::make_local(env, names_h());
4545 }
4546 JVM_END
4547
4548 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4549 {
4550 memset(info, 0, sizeof(info_size));
4551
4552 info->jvm_version = Abstract_VM_Version::jvm_version();
4553 info->update_version = 0; /* 0 in HotSpot Express VM */
4554 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4555
4556 // when we add a new capability in the jvm_version_info struct, we should also
4557 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4558 // counter defined in runtimeService.cpp.
4559 info->is_attachable = AttachListener::is_attach_supported();
4560 #ifdef KERNEL
4561 info->is_kernel_jvm = 1; // true;
4562 #else // KERNEL
4563 info->is_kernel_jvm = 0; // false;
4564 #endif // KERNEL
4565 }
4566 JVM_END
4567