1 /*
2 * Copyright 1997-2009 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 const char * trace = "explicit";
68 klassOop caller = NULL;
69 JavaThread* jthread = JavaThread::current();
70 if (jthread->has_last_Java_frame()) {
71 vframeStream vfst(jthread);
72
73 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
74 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK);
75 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
76 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK);
77 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
78
79 methodOop last_caller = NULL;
80
81 while (!vfst.at_end()) {
82 methodOop m = vfst.method();
83 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&&
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
85 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
86 break;
87 }
88 last_caller = m;
89 vfst.next();
90 }
91 // if this is called from Class.forName0 and that is called from Class.forName,
92 // then print the caller of Class.forName. If this is Class.loadClass, then print
93 // that caller, otherwise keep quiet since this should be picked up elsewhere.
94 bool found_it = false;
95 if (!vfst.at_end() &&
96 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
97 vfst.method()->name() == vmSymbols::forName0_name()) {
98 vfst.next();
99 if (!vfst.at_end() &&
100 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
101 vfst.method()->name() == vmSymbols::forName_name()) {
102 vfst.next();
103 found_it = true;
104 }
105 } else if (last_caller != NULL &&
106 instanceKlass::cast(last_caller->method_holder())->name() ==
107 vmSymbols::java_lang_ClassLoader() &&
108 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
109 last_caller->name() == vmSymbols::loadClass_name())) {
110 found_it = true;
111 } else if (!vfst.at_end()) {
112 if (vfst.method()->is_native()) {
113 // JNI call
114 found_it = true;
115 }
116 }
117 if (found_it && !vfst.at_end()) {
118 // found the caller
119 caller = vfst.method()->method_holder();
120 line_number = vfst.method()->line_number_from_bci(vfst.bci());
121 if (line_number == -1) {
122 // show method name if it's a native method
123 trace = vfst.method()->name_and_sig_as_C_string();
124 }
125 symbolOop s = instanceKlass::cast(caller)->source_file_name();
126 if (s != NULL) {
127 source_file = s->as_C_string();
128 }
129 }
130 }
131 if (caller != NULL) {
132 if (to_class != caller) {
133 const char * from = Klass::cast(caller)->external_name();
134 const char * to = Klass::cast(to_class)->external_name();
135 // print in a single call to reduce interleaving between threads
136 if (source_file != NULL) {
137 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
138 } else {
139 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
140 }
141 }
142 }
143 }
144
145 void trace_class_resolution(klassOop to_class) {
146 EXCEPTION_MARK;
147 trace_class_resolution_impl(to_class, THREAD);
148 if (HAS_PENDING_EXCEPTION) {
149 CLEAR_PENDING_EXCEPTION;
150 }
151 }
152
153 // Wrapper to trace JVM functions
154
155 #ifdef ASSERT
156 class JVMTraceWrapper : public StackObj {
157 public:
158 JVMTraceWrapper(const char* format, ...) {
159 if (TraceJVMCalls) {
160 va_list ap;
161 va_start(ap, format);
162 tty->print("JVM ");
163 tty->vprint_cr(format, ap);
164 va_end(ap);
165 }
166 }
167 };
168
169 Histogram* JVMHistogram;
170 volatile jint JVMHistogram_lock = 0;
171
172 class JVMHistogramElement : public HistogramElement {
173 public:
174 JVMHistogramElement(const char* name);
175 };
176
177 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
178 _name = elementName;
179 uintx count = 0;
180
181 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
182 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
183 count +=1;
184 if ( (WarnOnStalledSpinLock > 0)
185 && (count % WarnOnStalledSpinLock == 0)) {
186 warning("JVMHistogram_lock seems to be stalled");
187 }
188 }
189 }
190
191 if(JVMHistogram == NULL)
192 JVMHistogram = new Histogram("JVM Call Counts",100);
193
194 JVMHistogram->add_element(this);
195 Atomic::dec(&JVMHistogram_lock);
196 }
197
198 #define JVMCountWrapper(arg) \
199 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
200 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
201
202 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
203 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
204 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
205 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
206 #else
207 #define JVMWrapper(arg1)
208 #define JVMWrapper2(arg1, arg2)
209 #define JVMWrapper3(arg1, arg2, arg3)
210 #define JVMWrapper4(arg1, arg2, arg3, arg4)
211 #endif
212
213
214 // Interface version /////////////////////////////////////////////////////////////////////
215
216
217 JVM_LEAF(jint, JVM_GetInterfaceVersion())
218 return JVM_INTERFACE_VERSION;
219 JVM_END
220
221
222 // java.lang.System //////////////////////////////////////////////////////////////////////
223
224
225 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
226 JVMWrapper("JVM_CurrentTimeMillis");
227 return os::javaTimeMillis();
228 JVM_END
229
230 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
231 JVMWrapper("JVM_NanoTime");
232 return os::javaTimeNanos();
233 JVM_END
234
235
236 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
237 jobject dst, jint dst_pos, jint length))
238 JVMWrapper("JVM_ArrayCopy");
239 // Check if we have null pointers
240 if (src == NULL || dst == NULL) {
241 THROW(vmSymbols::java_lang_NullPointerException());
242 }
243 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
244 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
245 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
246 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
247 // Do copy
248 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
249 JVM_END
250
251
252 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
253 JavaValue r(T_OBJECT);
254 // public synchronized Object put(Object key, Object value);
255 HandleMark hm(THREAD);
256 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
257 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
258 JavaCalls::call_virtual(&r,
259 props,
260 KlassHandle(THREAD, SystemDictionary::properties_klass()),
261 vmSymbolHandles::put_name(),
262 vmSymbolHandles::object_object_object_signature(),
263 key_str,
264 value_str,
265 THREAD);
266 }
267
268
269 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
270
271
272 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
273 JVMWrapper("JVM_InitProperties");
274 ResourceMark rm;
275
276 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
277
278 // System property list includes both user set via -D option and
279 // jvm system specific properties.
280 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
281 PUTPROP(props, p->key(), p->value());
282 }
283
284 // Convert the -XX:MaxDirectMemorySize= command line flag
285 // to the sun.nio.MaxDirectMemorySize property.
286 // Do this after setting user properties to prevent people
287 // from setting the value with a -D option, as requested.
288 {
289 char as_chars[256];
290 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
291 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
292 }
293
294 // JVM monitoring and management support
295 // Add the sun.management.compiler property for the compiler's name
296 {
297 #undef CSIZE
298 #if defined(_LP64) || defined(_WIN64)
299 #define CSIZE "64-Bit "
300 #else
301 #define CSIZE
302 #endif // 64bit
303
304 #ifdef TIERED
305 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
306 #else
307 #if defined(COMPILER1)
308 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
309 #elif defined(COMPILER2)
310 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
311 #else
312 const char* compiler_name = "";
313 #endif // compilers
314 #endif // TIERED
315
316 if (*compiler_name != '\0' &&
317 (Arguments::mode() != Arguments::_int)) {
318 PUTPROP(props, "sun.management.compiler", compiler_name);
319 }
320 }
321
322 return properties;
323 JVM_END
324
325
326 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
327
328 extern volatile jint vm_created;
329
330 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
331 if (vm_created != 0 && (code == 0)) {
332 // The VM is about to exit. We call back into Java to check whether finalizers should be run
333 Universe::run_finalizers_on_exit();
334 }
335 before_exit(thread);
336 vm_exit(code);
337 JVM_END
338
339
340 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
341 before_exit(thread);
342 vm_exit(code);
343 JVM_END
344
345
346 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
347 register_on_exit_function(func);
348 JVM_END
349
350
351 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
352 JVMWrapper("JVM_GC");
353 if (!DisableExplicitGC) {
354 Universe::heap()->collect(GCCause::_java_lang_system_gc);
355 }
356 JVM_END
357
358
359 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
360 JVMWrapper("JVM_MaxObjectInspectionAge");
361 return Universe::heap()->millis_since_last_gc();
362 JVM_END
363
364
365 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
366 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
367 JVM_END
368
369
370 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
371 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
372 JVM_END
373
374 static inline jlong convert_size_t_to_jlong(size_t val) {
375 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
376 NOT_LP64 (return (jlong)val;)
377 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
378 }
379
380 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
381 JVMWrapper("JVM_TotalMemory");
382 size_t n = Universe::heap()->capacity();
383 return convert_size_t_to_jlong(n);
384 JVM_END
385
386
387 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
388 JVMWrapper("JVM_FreeMemory");
389 CollectedHeap* ch = Universe::heap();
390 size_t n;
391 {
392 MutexLocker x(Heap_lock);
393 n = ch->capacity() - ch->used();
394 }
395 return convert_size_t_to_jlong(n);
396 JVM_END
397
398
399 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
400 JVMWrapper("JVM_MaxMemory");
401 size_t n = Universe::heap()->max_capacity();
402 return convert_size_t_to_jlong(n);
403 JVM_END
404
405
406 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
407 JVMWrapper("JVM_ActiveProcessorCount");
408 return os::active_processor_count();
409 JVM_END
410
411
412
413 // java.lang.Throwable //////////////////////////////////////////////////////
414
415
416 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
417 JVMWrapper("JVM_FillInStackTrace");
418 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
419 java_lang_Throwable::fill_in_stack_trace(exception);
420 JVM_END
421
422
423 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
424 JVMWrapper("JVM_PrintStackTrace");
425 // Note: This is no longer used in Merlin, but we still support it for compatibility.
426 oop exception = JNIHandles::resolve_non_null(receiver);
427 oop stream = JNIHandles::resolve_non_null(printable);
428 java_lang_Throwable::print_stack_trace(exception, stream);
429 JVM_END
430
431
432 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
433 JVMWrapper("JVM_GetStackTraceDepth");
434 oop exception = JNIHandles::resolve(throwable);
435 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
436 JVM_END
437
438
439 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
440 JVMWrapper("JVM_GetStackTraceElement");
441 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
442 oop exception = JNIHandles::resolve(throwable);
443 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
444 return JNIHandles::make_local(env, element);
445 JVM_END
446
447
448 // java.lang.Object ///////////////////////////////////////////////
449
450
451 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
452 JVMWrapper("JVM_IHashCode");
453 // as implemented in the classic virtual machine; return 0 if object is NULL
454 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
455 JVM_END
456
457
458 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
459 JVMWrapper("JVM_MonitorWait");
460 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
461 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
462 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
463 if (JvmtiExport::should_post_monitor_wait()) {
464 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
465 }
466 ObjectSynchronizer::wait(obj, ms, CHECK);
467 JVM_END
468
469
470 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
471 JVMWrapper("JVM_MonitorNotify");
472 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
473 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
474 ObjectSynchronizer::notify(obj, CHECK);
475 JVM_END
476
477
478 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
479 JVMWrapper("JVM_MonitorNotifyAll");
480 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
481 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
482 ObjectSynchronizer::notifyall(obj, CHECK);
483 JVM_END
484
485
486 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
487 JVMWrapper("JVM_Clone");
488 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
489 const KlassHandle klass (THREAD, obj->klass());
490 JvmtiVMObjectAllocEventCollector oam;
491
492 #ifdef ASSERT
493 // Just checking that the cloneable flag is set correct
494 if (obj->is_javaArray()) {
495 guarantee(klass->is_cloneable(), "all arrays are cloneable");
496 } else {
497 guarantee(obj->is_instance(), "should be instanceOop");
498 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass());
499 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
500 }
501 #endif
502
503 // Check if class of obj supports the Cloneable interface.
504 // All arrays are considered to be cloneable (See JLS 20.1.5)
505 if (!klass->is_cloneable()) {
506 ResourceMark rm(THREAD);
507 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
508 }
509
510 // Make shallow object copy
511 const int size = obj->size();
512 oop new_obj = NULL;
513 if (obj->is_javaArray()) {
514 const int length = ((arrayOop)obj())->length();
515 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
516 } else {
517 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
518 }
519 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
520 // is modifying a reference field in the clonee, a non-oop-atomic copy might
521 // be suspended in the middle of copying the pointer and end up with parts
522 // of two different pointers in the field. Subsequent dereferences will crash.
523 // 4846409: an oop-copy of objects with long or double fields or arrays of same
524 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
525 // of oops. We know objects are aligned on a minimum of an jlong boundary.
526 // The same is true of StubRoutines::object_copy and the various oop_copy
527 // variants, and of the code generated by the inline_native_clone intrinsic.
528 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
529 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
530 (size_t)align_object_size(size) / HeapWordsPerLong);
531 // Clear the header
532 new_obj->init_mark();
533
534 // Store check (mark entire object and let gc sort it out)
535 BarrierSet* bs = Universe::heap()->barrier_set();
536 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
537 bs->write_region(MemRegion((HeapWord*)new_obj, size));
538
539 // Caution: this involves a java upcall, so the clone should be
540 // "gc-robust" by this stage.
541 if (klass->has_finalizer()) {
542 assert(obj->is_instance(), "should be instanceOop");
543 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
544 }
545
546 return JNIHandles::make_local(env, oop(new_obj));
547 JVM_END
548
549 // java.lang.Compiler ////////////////////////////////////////////////////
550
551 // The initial cuts of the HotSpot VM will not support JITs, and all existing
552 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
553 // functions are all silently ignored unless JVM warnings are printed.
554
555 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
556 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
557 JVM_END
558
559
560 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
561 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
562 return JNI_FALSE;
563 JVM_END
564
565
566 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
567 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
568 return JNI_FALSE;
569 JVM_END
570
571
572 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
573 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
574 return JNI_FALSE;
575 JVM_END
576
577
578 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
579 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
580 return NULL;
581 JVM_END
582
583
584 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
585 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
586 JVM_END
587
588
589 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
590 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
591 JVM_END
592
593
594
595 // Error message support //////////////////////////////////////////////////////
596
597 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
598 JVMWrapper("JVM_GetLastErrorString");
599 return hpi::lasterror(buf, len);
600 JVM_END
601
602
603 // java.io.File ///////////////////////////////////////////////////////////////
604
605 JVM_LEAF(char*, JVM_NativePath(char* path))
606 JVMWrapper2("JVM_NativePath (%s)", path);
607 return hpi::native_path(path);
608 JVM_END
609
610
611 // Misc. class handling ///////////////////////////////////////////////////////////
612
613
614 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
615 JVMWrapper("JVM_GetCallerClass");
616 klassOop k = thread->security_get_caller_class(depth);
617 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
618 JVM_END
619
620
621 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
622 JVMWrapper("JVM_FindPrimitiveClass");
623 oop mirror = NULL;
624 BasicType t = name2type(utf);
625 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
626 mirror = Universe::java_mirror(t);
627 }
628 if (mirror == NULL) {
629 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
630 } else {
631 return (jclass) JNIHandles::make_local(env, mirror);
632 }
633 JVM_END
634
635
636 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
637 JVMWrapper("JVM_ResolveClass");
638 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
639 JVM_END
640
641
642 // Returns a class loaded by the bootstrap class loader; or null
643 // if not found. ClassNotFoundException is not thrown.
644 //
645 // Rationale behind JVM_FindClassFromBootLoader
646 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
647 // b> because of (a) java.dll has a direct dependecy on the unexported
648 // private symbol "_JVM_FindClassFromClassLoader@20".
649 // c> the launcher cannot use the private symbol as it dynamically opens
650 // the entry point, so if something changes, the launcher will fail
651 // unexpectedly at runtime, it is safest for the launcher to dlopen a
652 // stable exported interface.
653 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
654 // signature to change from _JVM_FindClassFromClassLoader@20 to
655 // JVM_FindClassFromClassLoader and will not be backward compatible
656 // with older JDKs.
657 // Thus a public/stable exported entry point is the right solution,
658 // public here means public in linker semantics, and is exported only
659 // to the JDK, and is not intended to be a public API.
660
661 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
662 const char* name))
663 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
664
665 // Java libraries should ensure that name is never null...
666 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
667 // It's impossible to create this class; the name cannot fit
668 // into the constant pool.
669 return NULL;
670 }
671
672 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
673 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
674 if (k == NULL) {
675 return NULL;
676 }
677
678 if (TraceClassResolution) {
679 trace_class_resolution(k);
680 }
681 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
682 JVM_END
683
684 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
685 jboolean init, jobject loader,
686 jboolean throwError))
687 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
688 throwError ? "error" : "exception");
689 // Java libraries should ensure that name is never null...
690 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
691 // It's impossible to create this class; the name cannot fit
692 // into the constant pool.
693 if (throwError) {
694 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
695 } else {
696 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
697 }
698 }
699 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
700 Handle h_loader(THREAD, JNIHandles::resolve(loader));
701 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
702 Handle(), throwError, THREAD);
703
704 if (TraceClassResolution && result != NULL) {
705 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
706 }
707 return result;
708 JVM_END
709
710
711 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
712 jboolean init, jclass from))
713 JVMWrapper2("JVM_FindClassFromClass %s", name);
714 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
715 // It's impossible to create this class; the name cannot fit
716 // into the constant pool.
717 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
718 }
719 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
720 oop from_class_oop = JNIHandles::resolve(from);
721 klassOop from_class = (from_class_oop == NULL)
722 ? (klassOop)NULL
723 : java_lang_Class::as_klassOop(from_class_oop);
724 oop class_loader = NULL;
725 oop protection_domain = NULL;
726 if (from_class != NULL) {
727 class_loader = Klass::cast(from_class)->class_loader();
728 protection_domain = Klass::cast(from_class)->protection_domain();
729 }
730 Handle h_loader(THREAD, class_loader);
731 Handle h_prot (THREAD, protection_domain);
732 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
733 h_prot, true, thread);
734
735 if (TraceClassResolution && result != NULL) {
736 // this function is generally only used for class loading during verification.
737 ResourceMark rm;
738 oop from_mirror = JNIHandles::resolve_non_null(from);
739 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
740 const char * from_name = Klass::cast(from_class)->external_name();
741
742 oop mirror = JNIHandles::resolve_non_null(result);
743 klassOop to_class = java_lang_Class::as_klassOop(mirror);
744 const char * to = Klass::cast(to_class)->external_name();
745 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
746 }
747
748 return result;
749 JVM_END
750
751 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
752 if (loader.is_null()) {
753 return;
754 }
755
756 // check whether the current caller thread holds the lock or not.
757 // If not, increment the corresponding counter
758 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
759 ObjectSynchronizer::owner_self) {
760 counter->inc();
761 }
762 }
763
764 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
765 // and JVM_DefineClassWithSourceCond()
766 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
767 jobject loader, const jbyte *buf,
768 jsize len, jobject pd, const char *source,
769 jboolean verify, TRAPS) {
770 if (source == NULL) source = "__JVM_DefineClass__";
771
772 assert(THREAD->is_Java_thread(), "must be a JavaThread");
773 JavaThread* jt = (JavaThread*) THREAD;
774
775 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
776 ClassLoader::perf_define_appclass_selftime(),
777 ClassLoader::perf_define_appclasses(),
778 jt->get_thread_stat()->perf_recursion_counts_addr(),
779 jt->get_thread_stat()->perf_timers_addr(),
780 PerfClassTraceTime::DEFINE_CLASS);
781
782 if (UsePerfData) {
783 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
784 }
785
786 // Since exceptions can be thrown, class initialization can take place
787 // if name is NULL no check for class name in .class stream has to be made.
788 symbolHandle class_name;
789 if (name != NULL) {
790 const int str_len = (int)strlen(name);
791 if (str_len > symbolOopDesc::max_length()) {
792 // It's impossible to create this class; the name cannot fit
793 // into the constant pool.
794 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
795 }
796 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
797 }
798
799 ResourceMark rm(THREAD);
800 ClassFileStream st((u1*) buf, len, (char *)source);
801 Handle class_loader (THREAD, JNIHandles::resolve(loader));
802 if (UsePerfData) {
803 is_lock_held_by_thread(class_loader,
804 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
805 THREAD);
806 }
807 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
808 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
809 protection_domain, &st,
810 verify != 0,
811 CHECK_NULL);
812
813 if (TraceClassResolution && k != NULL) {
814 trace_class_resolution(k);
815 }
816
817 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
818 }
819
820
821 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
822 JVMWrapper2("JVM_DefineClass %s", name);
823
824 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
825 JVM_END
826
827
828 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
829 JVMWrapper2("JVM_DefineClassWithSource %s", name);
830
831 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
832 JVM_END
833
834 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
835 jobject loader, const jbyte *buf,
836 jsize len, jobject pd,
837 const char *source, jboolean verify))
838 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
839
840 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
841 JVM_END
842
843 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
844 JVMWrapper("JVM_FindLoadedClass");
845 ResourceMark rm(THREAD);
846
847 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
848 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
849
850 const char* str = java_lang_String::as_utf8_string(string());
851 // Sanity check, don't expect null
852 if (str == NULL) return NULL;
853
854 const int str_len = (int)strlen(str);
855 if (str_len > symbolOopDesc::max_length()) {
856 // It's impossible to create this class; the name cannot fit
857 // into the constant pool.
858 return NULL;
859 }
860 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
861
862 // Security Note:
863 // The Java level wrapper will perform the necessary security check allowing
864 // us to pass the NULL as the initiating class loader.
865 Handle h_loader(THREAD, JNIHandles::resolve(loader));
866 if (UsePerfData) {
867 is_lock_held_by_thread(h_loader,
868 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
869 THREAD);
870 }
871
872 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
873 h_loader,
874 Handle(),
875 CHECK_NULL);
876
877 return (k == NULL) ? NULL :
878 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
879 JVM_END
880
881
882 // Reflection support //////////////////////////////////////////////////////////////////////////////
883
884 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
885 assert (cls != NULL, "illegal class");
886 JVMWrapper("JVM_GetClassName");
887 JvmtiVMObjectAllocEventCollector oam;
888 ResourceMark rm(THREAD);
889 const char* name;
890 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
891 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
892 } else {
893 // Consider caching interned string in Klass
894 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
895 assert(k->is_klass(), "just checking");
896 name = Klass::cast(k)->external_name();
897 }
898 oop result = StringTable::intern((char*) name, CHECK_NULL);
899 return (jstring) JNIHandles::make_local(env, result);
900 JVM_END
901
902
903 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
904 JVMWrapper("JVM_GetClassInterfaces");
905 JvmtiVMObjectAllocEventCollector oam;
906 oop mirror = JNIHandles::resolve_non_null(cls);
907
908 // Special handling for primitive objects
909 if (java_lang_Class::is_primitive(mirror)) {
910 // Primitive objects does not have any interfaces
911 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
912 return (jobjectArray) JNIHandles::make_local(env, r);
913 }
914
915 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
916 // Figure size of result array
917 int size;
918 if (klass->oop_is_instance()) {
919 size = instanceKlass::cast(klass())->local_interfaces()->length();
920 } else {
921 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
922 size = 2;
923 }
924
925 // Allocate result array
926 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
927 objArrayHandle result (THREAD, r);
928 // Fill in result
929 if (klass->oop_is_instance()) {
930 // Regular instance klass, fill in all local interfaces
931 for (int index = 0; index < size; index++) {
932 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
933 result->obj_at_put(index, Klass::cast(k)->java_mirror());
934 }
935 } else {
936 // All arrays implement java.lang.Cloneable and java.io.Serializable
937 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
938 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
939 }
940 return (jobjectArray) JNIHandles::make_local(env, result());
941 JVM_END
942
943
944 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
945 JVMWrapper("JVM_GetClassLoader");
946 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
947 return NULL;
948 }
949 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
950 oop loader = Klass::cast(k)->class_loader();
951 return JNIHandles::make_local(env, loader);
952 JVM_END
953
954
955 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
956 JVMWrapper("JVM_IsInterface");
957 oop mirror = JNIHandles::resolve_non_null(cls);
958 if (java_lang_Class::is_primitive(mirror)) {
959 return JNI_FALSE;
960 }
961 klassOop k = java_lang_Class::as_klassOop(mirror);
962 jboolean result = Klass::cast(k)->is_interface();
963 assert(!result || Klass::cast(k)->oop_is_instance(),
964 "all interfaces are instance types");
965 // The compiler intrinsic for isInterface tests the
966 // Klass::_access_flags bits in the same way.
967 return result;
968 JVM_END
969
970
971 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
972 JVMWrapper("JVM_GetClassSigners");
973 JvmtiVMObjectAllocEventCollector oam;
974 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
975 // There are no signers for primitive types
976 return NULL;
977 }
978
979 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
980 objArrayOop signers = NULL;
981 if (Klass::cast(k)->oop_is_instance()) {
982 signers = instanceKlass::cast(k)->signers();
983 }
984
985 // If there are no signers set in the class, or if the class
986 // is an array, return NULL.
987 if (signers == NULL) return NULL;
988
989 // copy of the signers array
990 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
991 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
992 for (int index = 0; index < signers->length(); index++) {
993 signers_copy->obj_at_put(index, signers->obj_at(index));
994 }
995
996 // return the copy
997 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
998 JVM_END
999
1000
1001 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1002 JVMWrapper("JVM_SetClassSigners");
1003 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1004 // This call is ignored for primitive types and arrays.
1005 // Signers are only set once, ClassLoader.java, and thus shouldn't
1006 // be called with an array. Only the bootstrap loader creates arrays.
1007 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1008 if (Klass::cast(k)->oop_is_instance()) {
1009 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1010 }
1011 }
1012 JVM_END
1013
1014
1015 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1016 JVMWrapper("JVM_GetProtectionDomain");
1017 if (JNIHandles::resolve(cls) == NULL) {
1018 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1019 }
1020
1021 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1022 // Primitive types does not have a protection domain.
1023 return NULL;
1024 }
1025
1026 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1027 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1028 JVM_END
1029
1030
1031 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1032 // still defined in core libraries as of 1.5.
1033 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1034 JVMWrapper("JVM_SetProtectionDomain");
1035 if (JNIHandles::resolve(cls) == NULL) {
1036 THROW(vmSymbols::java_lang_NullPointerException());
1037 }
1038 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1039 // Call is ignored for primitive types
1040 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1041
1042 // cls won't be an array, as this called only from ClassLoader.defineClass
1043 if (Klass::cast(k)->oop_is_instance()) {
1044 oop pd = JNIHandles::resolve(protection_domain);
1045 assert(pd == NULL || pd->is_oop(), "just checking");
1046 instanceKlass::cast(k)->set_protection_domain(pd);
1047 }
1048 }
1049 JVM_END
1050
1051
1052 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1053 JVMWrapper("JVM_DoPrivileged");
1054
1055 if (action == NULL) {
1056 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1057 }
1058
1059 // Stack allocated list of privileged stack elements
1060 PrivilegedElement pi;
1061
1062 // Check that action object understands "Object run()"
1063 Handle object (THREAD, JNIHandles::resolve(action));
1064
1065 // get run() method
1066 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1067 vmSymbols::run_method_name(),
1068 vmSymbols::void_object_signature());
1069 methodHandle m (THREAD, m_oop);
1070 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1071 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1072 }
1073
1074 // Compute the frame initiating the do privileged operation and setup the privileged stack
1075 vframeStream vfst(thread);
1076 vfst.security_get_caller_frame(1);
1077
1078 if (!vfst.at_end()) {
1079 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1080 thread->set_privileged_stack_top(&pi);
1081 }
1082
1083
1084 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1085 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1086 Handle pending_exception;
1087 JavaValue result(T_OBJECT);
1088 JavaCallArguments args(object);
1089 JavaCalls::call(&result, m, &args, THREAD);
1090
1091 // done with action, remove ourselves from the list
1092 if (!vfst.at_end()) {
1093 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1094 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1095 }
1096
1097 if (HAS_PENDING_EXCEPTION) {
1098 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1099 CLEAR_PENDING_EXCEPTION;
1100
1101 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1102 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1103 // Throw a java.security.PrivilegedActionException(Exception e) exception
1104 JavaCallArguments args(pending_exception);
1105 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1106 vmSymbolHandles::exception_void_signature(),
1107 &args);
1108 }
1109 }
1110
1111 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1112 return JNIHandles::make_local(env, (oop) result.get_jobject());
1113 JVM_END
1114
1115
1116 // Returns the inherited_access_control_context field of the running thread.
1117 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1118 JVMWrapper("JVM_GetInheritedAccessControlContext");
1119 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1120 return JNIHandles::make_local(env, result);
1121 JVM_END
1122
1123 class RegisterArrayForGC {
1124 private:
1125 JavaThread *_thread;
1126 public:
1127 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1128 _thread = thread;
1129 _thread->register_array_for_gc(array);
1130 }
1131
1132 ~RegisterArrayForGC() {
1133 _thread->register_array_for_gc(NULL);
1134 }
1135 };
1136
1137
1138 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1139 JVMWrapper("JVM_GetStackAccessControlContext");
1140 if (!UsePrivilegedStack) return NULL;
1141
1142 ResourceMark rm(THREAD);
1143 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1144 JvmtiVMObjectAllocEventCollector oam;
1145
1146 // count the protection domains on the execution stack. We collapse
1147 // duplicate consecutive protection domains into a single one, as
1148 // well as stopping when we hit a privileged frame.
1149
1150 // Use vframeStream to iterate through Java frames
1151 vframeStream vfst(thread);
1152
1153 oop previous_protection_domain = NULL;
1154 Handle privileged_context(thread, NULL);
1155 bool is_privileged = false;
1156 oop protection_domain = NULL;
1157
1158 for(; !vfst.at_end(); vfst.next()) {
1159 // get method of frame
1160 methodOop method = vfst.method();
1161 intptr_t* frame_id = vfst.frame_id();
1162
1163 // check the privileged frames to see if we have a match
1164 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1165 // this frame is privileged
1166 is_privileged = true;
1167 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1168 protection_domain = thread->privileged_stack_top()->protection_domain();
1169 } else {
1170 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1171 }
1172
1173 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1174 local_array->push(protection_domain);
1175 previous_protection_domain = protection_domain;
1176 }
1177
1178 if (is_privileged) break;
1179 }
1180
1181
1182 // either all the domains on the stack were system domains, or
1183 // we had a privileged system domain
1184 if (local_array->is_empty()) {
1185 if (is_privileged && privileged_context.is_null()) return NULL;
1186
1187 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1188 return JNIHandles::make_local(env, result);
1189 }
1190
1191 // the resource area must be registered in case of a gc
1192 RegisterArrayForGC ragc(thread, local_array);
1193 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1194 local_array->length(), CHECK_NULL);
1195 objArrayHandle h_context(thread, context);
1196 for (int index = 0; index < local_array->length(); index++) {
1197 h_context->obj_at_put(index, local_array->at(index));
1198 }
1199
1200 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1201
1202 return JNIHandles::make_local(env, result);
1203 JVM_END
1204
1205
1206 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1207 JVMWrapper("JVM_IsArrayClass");
1208 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1209 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1210 JVM_END
1211
1212
1213 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1214 JVMWrapper("JVM_IsPrimitiveClass");
1215 oop mirror = JNIHandles::resolve_non_null(cls);
1216 return (jboolean) java_lang_Class::is_primitive(mirror);
1217 JVM_END
1218
1219
1220 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1221 JVMWrapper("JVM_GetComponentType");
1222 oop mirror = JNIHandles::resolve_non_null(cls);
1223 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1224 return (jclass) JNIHandles::make_local(env, result);
1225 JVM_END
1226
1227
1228 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1229 JVMWrapper("JVM_GetClassModifiers");
1230 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1231 // Primitive type
1232 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1233 }
1234
1235 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1236 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1237 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1238 return k->modifier_flags();
1239 JVM_END
1240
1241
1242 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1243
1244 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1245 const int inner_class_info_index = 0;
1246 const int outer_class_info_index = 1;
1247
1248 JvmtiVMObjectAllocEventCollector oam;
1249 // ofClass is a reference to a java_lang_Class object. The mirror object
1250 // of an instanceKlass
1251
1252 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1253 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1254 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1255 return (jobjectArray)JNIHandles::make_local(env, result);
1256 }
1257
1258 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1259
1260 if (k->inner_classes()->length() == 0) {
1261 // Neither an inner nor outer class
1262 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1263 return (jobjectArray)JNIHandles::make_local(env, result);
1264 }
1265
1266 // find inner class info
1267 typeArrayHandle icls(thread, k->inner_classes());
1268 constantPoolHandle cp(thread, k->constants());
1269 int length = icls->length();
1270
1271 // Allocate temp. result array
1272 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1273 objArrayHandle result (THREAD, r);
1274 int members = 0;
1275
1276 for(int i = 0; i < length; i += 4) {
1277 int ioff = icls->ushort_at(i + inner_class_info_index);
1278 int ooff = icls->ushort_at(i + outer_class_info_index);
1279
1280 if (ioff != 0 && ooff != 0) {
1281 // Check to see if the name matches the class we're looking for
1282 // before attempting to find the class.
1283 if (cp->klass_name_at_matches(k, ooff)) {
1284 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1285 if (outer_klass == k()) {
1286 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1287 instanceKlassHandle inner_klass (THREAD, ik);
1288
1289 // Throws an exception if outer klass has not declared k as
1290 // an inner klass
1291 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1292
1293 result->obj_at_put(members, inner_klass->java_mirror());
1294 members++;
1295 }
1296 }
1297 }
1298 }
1299
1300 if (members != length) {
1301 // Return array of right length
1302 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1303 for(int i = 0; i < members; i++) {
1304 res->obj_at_put(i, result->obj_at(i));
1305 }
1306 return (jobjectArray)JNIHandles::make_local(env, res);
1307 }
1308
1309 return (jobjectArray)JNIHandles::make_local(env, result());
1310 JVM_END
1311
1312
1313 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1314 {
1315 // ofClass is a reference to a java_lang_Class object.
1316 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1317 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1318 return NULL;
1319 }
1320
1321 symbolOop simple_name = NULL;
1322 klassOop outer_klass
1323 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1324 )->compute_enclosing_class(simple_name, CHECK_NULL);
1325 if (outer_klass == NULL) return NULL; // already a top-level class
1326 if (simple_name == NULL) return NULL; // an anonymous class (inside a method)
1327 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1328 }
1329 JVM_END
1330
1331 // should be in instanceKlass.cpp, but is here for historical reasons
1332 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1333 symbolOop& simple_name_result, TRAPS) {
1334 Thread* thread = THREAD;
1335 const int inner_class_info_index = inner_class_inner_class_info_offset;
1336 const int outer_class_info_index = inner_class_outer_class_info_offset;
1337
1338 if (k->inner_classes()->length() == 0) {
1339 // No inner class info => no declaring class
1340 return NULL;
1341 }
1342
1343 typeArrayHandle i_icls(thread, k->inner_classes());
1344 constantPoolHandle i_cp(thread, k->constants());
1345 int i_length = i_icls->length();
1346
1347 bool found = false;
1348 klassOop ok;
1349 instanceKlassHandle outer_klass;
1350 bool inner_is_member = false;
1351 int simple_name_index = 0;
1352
1353 // Find inner_klass attribute
1354 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1355 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1356 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1357 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1358 if (ioff != 0) {
1359 // Check to see if the name matches the class we're looking for
1360 // before attempting to find the class.
1361 if (i_cp->klass_name_at_matches(k, ioff)) {
1362 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1363 found = (k() == inner_klass);
1364 if (found && ooff != 0) {
1365 ok = i_cp->klass_at(ooff, CHECK_NULL);
1366 outer_klass = instanceKlassHandle(thread, ok);
1367 simple_name_index = noff;
1368 inner_is_member = true;
1369 }
1370 }
1371 }
1372 }
1373
1374 if (found && outer_klass.is_null()) {
1375 // It may be anonymous; try for that.
1376 int encl_method_class_idx = k->enclosing_method_class_index();
1377 if (encl_method_class_idx != 0) {
1378 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1379 outer_klass = instanceKlassHandle(thread, ok);
1380 inner_is_member = false;
1381 }
1382 }
1383
1384 // If no inner class attribute found for this class.
1385 if (outer_klass.is_null()) return NULL;
1386
1387 // Throws an exception if outer klass has not declared k as an inner klass
1388 // We need evidence that each klass knows about the other, or else
1389 // the system could allow a spoof of an inner class to gain access rights.
1390 Reflection::check_for_inner_class(outer_klass, k, inner_is_member, CHECK_NULL);
1391
1392 simple_name_result = (inner_is_member ? i_cp->symbol_at(simple_name_index) : symbolOop(NULL));
1393 return outer_klass();
1394 }
1395
1396 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1397 assert (cls != NULL, "illegal class");
1398 JVMWrapper("JVM_GetClassSignature");
1399 JvmtiVMObjectAllocEventCollector oam;
1400 ResourceMark rm(THREAD);
1401 // Return null for arrays and primatives
1402 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1403 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1404 if (Klass::cast(k)->oop_is_instance()) {
1405 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1406 if (sym.is_null()) return NULL;
1407 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1408 return (jstring) JNIHandles::make_local(env, str());
1409 }
1410 }
1411 return NULL;
1412 JVM_END
1413
1414
1415 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1416 assert (cls != NULL, "illegal class");
1417 JVMWrapper("JVM_GetClassAnnotations");
1418 ResourceMark rm(THREAD);
1419 // Return null for arrays and primitives
1420 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1421 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1422 if (Klass::cast(k)->oop_is_instance()) {
1423 return (jbyteArray) JNIHandles::make_local(env,
1424 instanceKlass::cast(k)->class_annotations());
1425 }
1426 }
1427 return NULL;
1428 JVM_END
1429
1430
1431 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1432 assert(field != NULL, "illegal field");
1433 JVMWrapper("JVM_GetFieldAnnotations");
1434
1435 // some of this code was adapted from from jni_FromReflectedField
1436
1437 // field is a handle to a java.lang.reflect.Field object
1438 oop reflected = JNIHandles::resolve_non_null(field);
1439 oop mirror = java_lang_reflect_Field::clazz(reflected);
1440 klassOop k = java_lang_Class::as_klassOop(mirror);
1441 int slot = java_lang_reflect_Field::slot(reflected);
1442 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1443
1444 fieldDescriptor fd;
1445 KlassHandle kh(THREAD, k);
1446 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1447
1448 if (modifiers & JVM_ACC_STATIC) {
1449 // for static fields we only look in the current class
1450 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1451 true, &fd)) {
1452 assert(false, "cannot find static field");
1453 return NULL; // robustness
1454 }
1455 } else {
1456 // for instance fields we start with the current class and work
1457 // our way up through the superclass chain
1458 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1459 &fd)) {
1460 assert(false, "cannot find instance field");
1461 return NULL; // robustness
1462 }
1463 }
1464
1465 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1466 JVM_END
1467
1468
1469 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1470 // some of this code was adapted from from jni_FromReflectedMethod
1471
1472 oop reflected = JNIHandles::resolve_non_null(method);
1473 oop mirror = NULL;
1474 int slot = 0;
1475
1476 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1477 mirror = java_lang_reflect_Constructor::clazz(reflected);
1478 slot = java_lang_reflect_Constructor::slot(reflected);
1479 } else {
1480 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1481 "wrong type");
1482 mirror = java_lang_reflect_Method::clazz(reflected);
1483 slot = java_lang_reflect_Method::slot(reflected);
1484 }
1485 klassOop k = java_lang_Class::as_klassOop(mirror);
1486
1487 KlassHandle kh(THREAD, k);
1488 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1489 if (m == NULL) {
1490 assert(false, "cannot find method");
1491 return NULL; // robustness
1492 }
1493
1494 return m;
1495 }
1496
1497
1498 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1499 JVMWrapper("JVM_GetMethodAnnotations");
1500
1501 // method is a handle to a java.lang.reflect.Method object
1502 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1503 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1504 JVM_END
1505
1506
1507 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1508 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1509
1510 // method is a handle to a java.lang.reflect.Method object
1511 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1512 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1513 JVM_END
1514
1515
1516 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1517 JVMWrapper("JVM_GetMethodParameterAnnotations");
1518
1519 // method is a handle to a java.lang.reflect.Method object
1520 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1521 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1522 JVM_END
1523
1524
1525 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1526
1527 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1528 {
1529 JVMWrapper("JVM_GetClassDeclaredFields");
1530 JvmtiVMObjectAllocEventCollector oam;
1531
1532 // Exclude primitive types and array types
1533 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1534 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1535 // Return empty array
1536 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1537 return (jobjectArray) JNIHandles::make_local(env, res);
1538 }
1539
1540 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1541 constantPoolHandle cp(THREAD, k->constants());
1542
1543 // Ensure class is linked
1544 k->link_class(CHECK_NULL);
1545
1546 typeArrayHandle fields(THREAD, k->fields());
1547 int fields_len = fields->length();
1548
1549 // 4496456 We need to filter out java.lang.Throwable.backtrace
1550 bool skip_backtrace = false;
1551
1552 // Allocate result
1553 int num_fields;
1554
1555 if (publicOnly) {
1556 num_fields = 0;
1557 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1558 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1559 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1560 }
1561 } else {
1562 num_fields = fields_len / instanceKlass::next_offset;
1563
1564 if (k() == SystemDictionary::throwable_klass()) {
1565 num_fields--;
1566 skip_backtrace = true;
1567 }
1568 }
1569
1570 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1571 objArrayHandle result (THREAD, r);
1572
1573 int out_idx = 0;
1574 fieldDescriptor fd;
1575 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1576 if (skip_backtrace) {
1577 // 4496456 skip java.lang.Throwable.backtrace
1578 int offset = k->offset_from_fields(i);
1579 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1580 }
1581
1582 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1583 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1584 fd.initialize(k(), i);
1585 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1586 result->obj_at_put(out_idx, field);
1587 ++out_idx;
1588 }
1589 }
1590 assert(out_idx == num_fields, "just checking");
1591 return (jobjectArray) JNIHandles::make_local(env, result());
1592 }
1593 JVM_END
1594
1595 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1596 {
1597 JVMWrapper("JVM_GetClassDeclaredMethods");
1598 JvmtiVMObjectAllocEventCollector oam;
1599
1600 // Exclude primitive types and array types
1601 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1602 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1603 // Return empty array
1604 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1605 return (jobjectArray) JNIHandles::make_local(env, res);
1606 }
1607
1608 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1609
1610 // Ensure class is linked
1611 k->link_class(CHECK_NULL);
1612
1613 objArrayHandle methods (THREAD, k->methods());
1614 int methods_length = methods->length();
1615 int num_methods = 0;
1616
1617 int i;
1618 for (i = 0; i < methods_length; i++) {
1619 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1620 if (!method->is_initializer()) {
1621 if (!publicOnly || method->is_public()) {
1622 ++num_methods;
1623 }
1624 }
1625 }
1626
1627 // Allocate result
1628 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1629 objArrayHandle result (THREAD, r);
1630
1631 int out_idx = 0;
1632 for (i = 0; i < methods_length; i++) {
1633 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1634 if (!method->is_initializer()) {
1635 if (!publicOnly || method->is_public()) {
1636 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1637 result->obj_at_put(out_idx, m);
1638 ++out_idx;
1639 }
1640 }
1641 }
1642 assert(out_idx == num_methods, "just checking");
1643 return (jobjectArray) JNIHandles::make_local(env, result());
1644 }
1645 JVM_END
1646
1647 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1648 {
1649 JVMWrapper("JVM_GetClassDeclaredConstructors");
1650 JvmtiVMObjectAllocEventCollector oam;
1651
1652 // Exclude primitive types and array types
1653 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1654 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1655 // Return empty array
1656 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1657 return (jobjectArray) JNIHandles::make_local(env, res);
1658 }
1659
1660 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1661
1662 // Ensure class is linked
1663 k->link_class(CHECK_NULL);
1664
1665 objArrayHandle methods (THREAD, k->methods());
1666 int methods_length = methods->length();
1667 int num_constructors = 0;
1668
1669 int i;
1670 for (i = 0; i < methods_length; i++) {
1671 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1672 if (method->is_initializer() && !method->is_static()) {
1673 if (!publicOnly || method->is_public()) {
1674 ++num_constructors;
1675 }
1676 }
1677 }
1678
1679 // Allocate result
1680 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1681 objArrayHandle result(THREAD, r);
1682
1683 int out_idx = 0;
1684 for (i = 0; i < methods_length; i++) {
1685 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1686 if (method->is_initializer() && !method->is_static()) {
1687 if (!publicOnly || method->is_public()) {
1688 oop m = Reflection::new_constructor(method, CHECK_NULL);
1689 result->obj_at_put(out_idx, m);
1690 ++out_idx;
1691 }
1692 }
1693 }
1694 assert(out_idx == num_constructors, "just checking");
1695 return (jobjectArray) JNIHandles::make_local(env, result());
1696 }
1697 JVM_END
1698
1699 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1700 {
1701 JVMWrapper("JVM_GetClassAccessFlags");
1702 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1703 // Primitive type
1704 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1705 }
1706
1707 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1708 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1709 }
1710 JVM_END
1711
1712
1713 // Constant pool access //////////////////////////////////////////////////////////
1714
1715 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1716 {
1717 JVMWrapper("JVM_GetClassConstantPool");
1718 JvmtiVMObjectAllocEventCollector oam;
1719
1720 // Return null for primitives and arrays
1721 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1722 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1723 if (Klass::cast(k)->oop_is_instance()) {
1724 instanceKlassHandle k_h(THREAD, k);
1725 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1726 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1727 return JNIHandles::make_local(jcp());
1728 }
1729 }
1730 return NULL;
1731 }
1732 JVM_END
1733
1734
1735 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1736 {
1737 JVMWrapper("JVM_ConstantPoolGetSize");
1738 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1739 return cp->length();
1740 }
1741 JVM_END
1742
1743
1744 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1745 if (!cp->is_within_bounds(index)) {
1746 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1747 }
1748 }
1749
1750
1751 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1752 {
1753 JVMWrapper("JVM_ConstantPoolGetClassAt");
1754 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1755 bounds_check(cp, index, CHECK_NULL);
1756 constantTag tag = cp->tag_at(index);
1757 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1758 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1759 }
1760 klassOop k = cp->klass_at(index, CHECK_NULL);
1761 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1762 }
1763 JVM_END
1764
1765
1766 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1767 {
1768 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1769 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1770 bounds_check(cp, index, CHECK_NULL);
1771 constantTag tag = cp->tag_at(index);
1772 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1773 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1774 }
1775 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1776 if (k == NULL) return NULL;
1777 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1778 }
1779 JVM_END
1780
1781 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1782 constantTag tag = cp->tag_at(index);
1783 if (!tag.is_method() && !tag.is_interface_method()) {
1784 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1785 }
1786 int klass_ref = cp->uncached_klass_ref_index_at(index);
1787 klassOop k_o;
1788 if (force_resolution) {
1789 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1790 } else {
1791 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1792 if (k_o == NULL) return NULL;
1793 }
1794 instanceKlassHandle k(THREAD, k_o);
1795 symbolOop name = cp->uncached_name_ref_at(index);
1796 symbolOop sig = cp->uncached_signature_ref_at(index);
1797 methodHandle m (THREAD, k->find_method(name, sig));
1798 if (m.is_null()) {
1799 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1800 }
1801 oop method;
1802 if (!m->is_initializer() || m->is_static()) {
1803 method = Reflection::new_method(m, true, true, CHECK_NULL);
1804 } else {
1805 method = Reflection::new_constructor(m, CHECK_NULL);
1806 }
1807 return JNIHandles::make_local(method);
1808 }
1809
1810 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1811 {
1812 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1813 JvmtiVMObjectAllocEventCollector oam;
1814 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1815 bounds_check(cp, index, CHECK_NULL);
1816 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1817 return res;
1818 }
1819 JVM_END
1820
1821 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1822 {
1823 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1824 JvmtiVMObjectAllocEventCollector oam;
1825 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1826 bounds_check(cp, index, CHECK_NULL);
1827 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1828 return res;
1829 }
1830 JVM_END
1831
1832 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1833 constantTag tag = cp->tag_at(index);
1834 if (!tag.is_field()) {
1835 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1836 }
1837 int klass_ref = cp->uncached_klass_ref_index_at(index);
1838 klassOop k_o;
1839 if (force_resolution) {
1840 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1841 } else {
1842 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1843 if (k_o == NULL) return NULL;
1844 }
1845 instanceKlassHandle k(THREAD, k_o);
1846 symbolOop name = cp->uncached_name_ref_at(index);
1847 symbolOop sig = cp->uncached_signature_ref_at(index);
1848 fieldDescriptor fd;
1849 klassOop target_klass = k->find_field(name, sig, &fd);
1850 if (target_klass == NULL) {
1851 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1852 }
1853 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1854 return JNIHandles::make_local(field);
1855 }
1856
1857 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1858 {
1859 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1860 JvmtiVMObjectAllocEventCollector oam;
1861 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1862 bounds_check(cp, index, CHECK_NULL);
1863 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1864 return res;
1865 }
1866 JVM_END
1867
1868 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1869 {
1870 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1871 JvmtiVMObjectAllocEventCollector oam;
1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1873 bounds_check(cp, index, CHECK_NULL);
1874 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1875 return res;
1876 }
1877 JVM_END
1878
1879 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1880 {
1881 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1882 JvmtiVMObjectAllocEventCollector oam;
1883 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1884 bounds_check(cp, index, CHECK_NULL);
1885 constantTag tag = cp->tag_at(index);
1886 if (!tag.is_field_or_method()) {
1887 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1888 }
1889 int klass_ref = cp->uncached_klass_ref_index_at(index);
1890 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1891 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1892 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1893 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1894 objArrayHandle dest(THREAD, dest_o);
1895 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1896 dest->obj_at_put(0, str());
1897 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1898 dest->obj_at_put(1, str());
1899 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1900 dest->obj_at_put(2, str());
1901 return (jobjectArray) JNIHandles::make_local(dest());
1902 }
1903 JVM_END
1904
1905 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1906 {
1907 JVMWrapper("JVM_ConstantPoolGetIntAt");
1908 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1909 bounds_check(cp, index, CHECK_0);
1910 constantTag tag = cp->tag_at(index);
1911 if (!tag.is_int()) {
1912 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1913 }
1914 return cp->int_at(index);
1915 }
1916 JVM_END
1917
1918 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1919 {
1920 JVMWrapper("JVM_ConstantPoolGetLongAt");
1921 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1922 bounds_check(cp, index, CHECK_(0L));
1923 constantTag tag = cp->tag_at(index);
1924 if (!tag.is_long()) {
1925 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1926 }
1927 return cp->long_at(index);
1928 }
1929 JVM_END
1930
1931 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1932 {
1933 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1934 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1935 bounds_check(cp, index, CHECK_(0.0f));
1936 constantTag tag = cp->tag_at(index);
1937 if (!tag.is_float()) {
1938 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1939 }
1940 return cp->float_at(index);
1941 }
1942 JVM_END
1943
1944 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1945 {
1946 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1947 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1948 bounds_check(cp, index, CHECK_(0.0));
1949 constantTag tag = cp->tag_at(index);
1950 if (!tag.is_double()) {
1951 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1952 }
1953 return cp->double_at(index);
1954 }
1955 JVM_END
1956
1957 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1958 {
1959 JVMWrapper("JVM_ConstantPoolGetStringAt");
1960 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1961 bounds_check(cp, index, CHECK_NULL);
1962 constantTag tag = cp->tag_at(index);
1963 if (!tag.is_string() && !tag.is_unresolved_string()) {
1964 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1965 }
1966 oop str = cp->string_at(index, CHECK_NULL);
1967 return (jstring) JNIHandles::make_local(str);
1968 }
1969 JVM_END
1970
1971 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1972 {
1973 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1974 JvmtiVMObjectAllocEventCollector oam;
1975 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1976 bounds_check(cp, index, CHECK_NULL);
1977 constantTag tag = cp->tag_at(index);
1978 if (!tag.is_symbol()) {
1979 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1980 }
1981 symbolOop sym_o = cp->symbol_at(index);
1982 symbolHandle sym(THREAD, sym_o);
1983 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1984 return (jstring) JNIHandles::make_local(str());
1985 }
1986 JVM_END
1987
1988
1989 // Assertion support. //////////////////////////////////////////////////////////
1990
1991 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1992 JVMWrapper("JVM_DesiredAssertionStatus");
1993 assert(cls != NULL, "bad class");
1994
1995 oop r = JNIHandles::resolve(cls);
1996 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1997 if (java_lang_Class::is_primitive(r)) return false;
1998
1999 klassOop k = java_lang_Class::as_klassOop(r);
2000 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2001 if (! Klass::cast(k)->oop_is_instance()) return false;
2002
2003 ResourceMark rm(THREAD);
2004 const char* name = Klass::cast(k)->name()->as_C_string();
2005 bool system_class = Klass::cast(k)->class_loader() == NULL;
2006 return JavaAssertions::enabled(name, system_class);
2007
2008 JVM_END
2009
2010
2011 // Return a new AssertionStatusDirectives object with the fields filled in with
2012 // command-line assertion arguments (i.e., -ea, -da).
2013 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2014 JVMWrapper("JVM_AssertionStatusDirectives");
2015 JvmtiVMObjectAllocEventCollector oam;
2016 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2017 return JNIHandles::make_local(env, asd);
2018 JVM_END
2019
2020 // Verification ////////////////////////////////////////////////////////////////////////////////
2021
2022 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2023
2024 // RedefineClasses support: bug 6214132 caused verification to fail.
2025 // All functions from this section should call the jvmtiThreadSate function:
2026 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2027 // The function returns a klassOop of the _scratch_class if the verifier
2028 // was invoked in the middle of the class redefinition.
2029 // Otherwise it returns its argument value which is the _the_class klassOop.
2030 // Please, refer to the description in the jvmtiThreadSate.hpp.
2031
2032 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2033 JVMWrapper("JVM_GetClassNameUTF");
2034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2035 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2036 return Klass::cast(k)->name()->as_utf8();
2037 JVM_END
2038
2039
2040 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2041 JVMWrapper("JVM_GetClassCPTypes");
2042 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2043 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2044 // types will have length zero if this is not an instanceKlass
2045 // (length is determined by call to JVM_GetClassCPEntriesCount)
2046 if (Klass::cast(k)->oop_is_instance()) {
2047 constantPoolOop cp = instanceKlass::cast(k)->constants();
2048 for (int index = cp->length() - 1; index >= 0; index--) {
2049 constantTag tag = cp->tag_at(index);
2050 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2051 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2052 }
2053 }
2054 JVM_END
2055
2056
2057 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2058 JVMWrapper("JVM_GetClassCPEntriesCount");
2059 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2060 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2061 if (!Klass::cast(k)->oop_is_instance())
2062 return 0;
2063 return instanceKlass::cast(k)->constants()->length();
2064 JVM_END
2065
2066
2067 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2068 JVMWrapper("JVM_GetClassFieldsCount");
2069 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2070 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2071 if (!Klass::cast(k)->oop_is_instance())
2072 return 0;
2073 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
2074 JVM_END
2075
2076
2077 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2078 JVMWrapper("JVM_GetClassMethodsCount");
2079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2080 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2081 if (!Klass::cast(k)->oop_is_instance())
2082 return 0;
2083 return instanceKlass::cast(k)->methods()->length();
2084 JVM_END
2085
2086
2087 // The following methods, used for the verifier, are never called with
2088 // array klasses, so a direct cast to instanceKlass is safe.
2089 // Typically, these methods are called in a loop with bounds determined
2090 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2091 // zero for arrays.
2092 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2093 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2094 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2095 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2096 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2097 int length = methodOop(method)->checked_exceptions_length();
2098 if (length > 0) {
2099 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2100 for (int i = 0; i < length; i++) {
2101 exceptions[i] = table[i].class_cp_index;
2102 }
2103 }
2104 JVM_END
2105
2106
2107 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2108 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2109 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2110 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2111 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2112 return methodOop(method)->checked_exceptions_length();
2113 JVM_END
2114
2115
2116 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2117 JVMWrapper("JVM_GetMethodIxByteCode");
2118 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2119 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2120 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2121 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2122 JVM_END
2123
2124
2125 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2126 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2127 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2128 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2129 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2130 return methodOop(method)->code_size();
2131 JVM_END
2132
2133
2134 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2135 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2136 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2137 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2138 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2139 typeArrayOop extable = methodOop(method)->exception_table();
2140 entry->start_pc = extable->int_at(entry_index * 4);
2141 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2142 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2143 entry->catchType = extable->int_at(entry_index * 4 + 3);
2144 JVM_END
2145
2146
2147 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2148 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2149 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2150 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2151 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2152 return methodOop(method)->exception_table()->length() / 4;
2153 JVM_END
2154
2155
2156 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2157 JVMWrapper("JVM_GetMethodIxModifiers");
2158 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2159 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2160 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2161 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2162 JVM_END
2163
2164
2165 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2166 JVMWrapper("JVM_GetFieldIxModifiers");
2167 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2168 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2169 typeArrayOop fields = instanceKlass::cast(k)->fields();
2170 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2171 JVM_END
2172
2173
2174 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2175 JVMWrapper("JVM_GetMethodIxLocalsCount");
2176 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2177 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2178 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2179 return methodOop(method)->max_locals();
2180 JVM_END
2181
2182
2183 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2184 JVMWrapper("JVM_GetMethodIxArgsSize");
2185 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2186 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2187 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2188 return methodOop(method)->size_of_parameters();
2189 JVM_END
2190
2191
2192 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2193 JVMWrapper("JVM_GetMethodIxMaxStack");
2194 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2195 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2196 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2197 return methodOop(method)->max_stack();
2198 JVM_END
2199
2200
2201 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2202 JVMWrapper("JVM_IsConstructorIx");
2203 ResourceMark rm(THREAD);
2204 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2205 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2206 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2207 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2208 JVM_END
2209
2210
2211 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2212 JVMWrapper("JVM_GetMethodIxIxUTF");
2213 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2214 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2215 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2216 return methodOop(method)->name()->as_utf8();
2217 JVM_END
2218
2219
2220 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2221 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2222 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2223 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2224 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2225 return methodOop(method)->signature()->as_utf8();
2226 JVM_END
2227
2228 /**
2229 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2230 * read entries in the constant pool. Since the old verifier always
2231 * works on a copy of the code, it will not see any rewriting that
2232 * may possibly occur in the middle of verification. So it is important
2233 * that nothing it calls tries to use the cpCache instead of the raw
2234 * constant pool, so we must use cp->uncached_x methods when appropriate.
2235 */
2236 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2237 JVMWrapper("JVM_GetCPFieldNameUTF");
2238 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2239 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2240 constantPoolOop cp = instanceKlass::cast(k)->constants();
2241 switch (cp->tag_at(cp_index).value()) {
2242 case JVM_CONSTANT_Fieldref:
2243 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2244 default:
2245 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2246 }
2247 ShouldNotReachHere();
2248 return NULL;
2249 JVM_END
2250
2251
2252 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2253 JVMWrapper("JVM_GetCPMethodNameUTF");
2254 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2255 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2256 constantPoolOop cp = instanceKlass::cast(k)->constants();
2257 switch (cp->tag_at(cp_index).value()) {
2258 case JVM_CONSTANT_InterfaceMethodref:
2259 case JVM_CONSTANT_Methodref:
2260 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2261 case JVM_CONSTANT_NameAndType:
2262 // for invokedynamic
2263 return cp->nt_name_ref_at(cp_index)->as_utf8();
2264 default:
2265 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2266 }
2267 ShouldNotReachHere();
2268 return NULL;
2269 JVM_END
2270
2271
2272 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2273 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2274 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2275 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2276 constantPoolOop cp = instanceKlass::cast(k)->constants();
2277 switch (cp->tag_at(cp_index).value()) {
2278 case JVM_CONSTANT_InterfaceMethodref:
2279 case JVM_CONSTANT_Methodref:
2280 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2281 case JVM_CONSTANT_NameAndType:
2282 // for invokedynamic
2283 return cp->nt_signature_ref_at(cp_index)->as_utf8();
2284 default:
2285 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2286 }
2287 ShouldNotReachHere();
2288 return NULL;
2289 JVM_END
2290
2291
2292 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2293 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2294 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296 constantPoolOop cp = instanceKlass::cast(k)->constants();
2297 switch (cp->tag_at(cp_index).value()) {
2298 case JVM_CONSTANT_Fieldref:
2299 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2300 default:
2301 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2302 }
2303 ShouldNotReachHere();
2304 return NULL;
2305 JVM_END
2306
2307
2308 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2309 JVMWrapper("JVM_GetCPClassNameUTF");
2310 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2311 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312 constantPoolOop cp = instanceKlass::cast(k)->constants();
2313 symbolOop classname = cp->klass_name_at(cp_index);
2314 return classname->as_utf8();
2315 JVM_END
2316
2317
2318 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2319 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2320 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322 constantPoolOop cp = instanceKlass::cast(k)->constants();
2323 switch (cp->tag_at(cp_index).value()) {
2324 case JVM_CONSTANT_Fieldref: {
2325 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2326 symbolOop classname = cp->klass_name_at(class_index);
2327 return classname->as_utf8();
2328 }
2329 default:
2330 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2331 }
2332 ShouldNotReachHere();
2333 return NULL;
2334 JVM_END
2335
2336
2337 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2338 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 constantPoolOop cp = instanceKlass::cast(k)->constants();
2342 switch (cp->tag_at(cp_index).value()) {
2343 case JVM_CONSTANT_Methodref:
2344 case JVM_CONSTANT_InterfaceMethodref: {
2345 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2346 symbolOop classname = cp->klass_name_at(class_index);
2347 return classname->as_utf8();
2348 }
2349 default:
2350 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2351 }
2352 ShouldNotReachHere();
2353 return NULL;
2354 JVM_END
2355
2356
2357 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2358 JVMWrapper("JVM_GetCPFieldModifiers");
2359 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2360 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2363 constantPoolOop cp = instanceKlass::cast(k)->constants();
2364 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2365 switch (cp->tag_at(cp_index).value()) {
2366 case JVM_CONSTANT_Fieldref: {
2367 symbolOop name = cp->uncached_name_ref_at(cp_index);
2368 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2369 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2370 int fields_count = fields->length();
2371 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2372 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2373 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2374 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2375 }
2376 }
2377 return -1;
2378 }
2379 default:
2380 fatal("JVM_GetCPFieldModifiers: illegal constant");
2381 }
2382 ShouldNotReachHere();
2383 return 0;
2384 JVM_END
2385
2386
2387 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2388 JVMWrapper("JVM_GetCPMethodModifiers");
2389 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2390 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2393 constantPoolOop cp = instanceKlass::cast(k)->constants();
2394 switch (cp->tag_at(cp_index).value()) {
2395 case JVM_CONSTANT_Methodref:
2396 case JVM_CONSTANT_InterfaceMethodref: {
2397 symbolOop name = cp->uncached_name_ref_at(cp_index);
2398 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2399 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2400 int methods_count = methods->length();
2401 for (int i = 0; i < methods_count; i++) {
2402 methodOop method = methodOop(methods->obj_at(i));
2403 if (method->name() == name && method->signature() == signature) {
2404 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2405 }
2406 }
2407 return -1;
2408 }
2409 default:
2410 fatal("JVM_GetCPMethodModifiers: illegal constant");
2411 }
2412 ShouldNotReachHere();
2413 return 0;
2414 JVM_END
2415
2416
2417 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2418
2419 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2420 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2421 JVM_END
2422
2423
2424 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2425 JVMWrapper("JVM_IsSameClassPackage");
2426 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2427 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2428 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2429 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2430 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2431 JVM_END
2432
2433
2434 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2435
2436 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2437 JVMWrapper2("JVM_Open (%s)", fname);
2438
2439 //%note jvm_r6
2440 int result = hpi::open(fname, flags, mode);
2441 if (result >= 0) {
2442 return result;
2443 } else {
2444 switch(errno) {
2445 case EEXIST:
2446 return JVM_EEXIST;
2447 default:
2448 return -1;
2449 }
2450 }
2451 JVM_END
2452
2453
2454 JVM_LEAF(jint, JVM_Close(jint fd))
2455 JVMWrapper2("JVM_Close (0x%x)", fd);
2456 //%note jvm_r6
2457 return hpi::close(fd);
2458 JVM_END
2459
2460
2461 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2462 JVMWrapper2("JVM_Read (0x%x)", fd);
2463
2464 //%note jvm_r6
2465 return (jint)hpi::read(fd, buf, nbytes);
2466 JVM_END
2467
2468
2469 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2470 JVMWrapper2("JVM_Write (0x%x)", fd);
2471
2472 //%note jvm_r6
2473 return (jint)hpi::write(fd, buf, nbytes);
2474 JVM_END
2475
2476
2477 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2478 JVMWrapper2("JVM_Available (0x%x)", fd);
2479 //%note jvm_r6
2480 return hpi::available(fd, pbytes);
2481 JVM_END
2482
2483
2484 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2485 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2486 //%note jvm_r6
2487 return hpi::lseek(fd, offset, whence);
2488 JVM_END
2489
2490
2491 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2492 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2493 return hpi::ftruncate(fd, length);
2494 JVM_END
2495
2496
2497 JVM_LEAF(jint, JVM_Sync(jint fd))
2498 JVMWrapper2("JVM_Sync (0x%x)", fd);
2499 //%note jvm_r6
2500 return hpi::fsync(fd);
2501 JVM_END
2502
2503
2504 // Printing support //////////////////////////////////////////////////
2505 extern "C" {
2506
2507 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2508 // see bug 4399518, 4417214
2509 if ((intptr_t)count <= 0) return -1;
2510 return vsnprintf(str, count, fmt, args);
2511 }
2512
2513
2514 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2515 va_list args;
2516 int len;
2517 va_start(args, fmt);
2518 len = jio_vsnprintf(str, count, fmt, args);
2519 va_end(args);
2520 return len;
2521 }
2522
2523
2524 int jio_fprintf(FILE* f, const char *fmt, ...) {
2525 int len;
2526 va_list args;
2527 va_start(args, fmt);
2528 len = jio_vfprintf(f, fmt, args);
2529 va_end(args);
2530 return len;
2531 }
2532
2533
2534 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2535 if (Arguments::vfprintf_hook() != NULL) {
2536 return Arguments::vfprintf_hook()(f, fmt, args);
2537 } else {
2538 return vfprintf(f, fmt, args);
2539 }
2540 }
2541
2542
2543 int jio_printf(const char *fmt, ...) {
2544 int len;
2545 va_list args;
2546 va_start(args, fmt);
2547 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2548 va_end(args);
2549 return len;
2550 }
2551
2552
2553 // HotSpot specific jio method
2554 void jio_print(const char* s) {
2555 // Try to make this function as atomic as possible.
2556 if (Arguments::vfprintf_hook() != NULL) {
2557 jio_fprintf(defaultStream::output_stream(), "%s", s);
2558 } else {
2559 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2560 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2561 }
2562 }
2563
2564 } // Extern C
2565
2566 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2567
2568 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2569 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2570 // OSThread objects. The exception to this rule is when the target object is the thread
2571 // doing the operation, in which case we know that the thread won't exit until the
2572 // operation is done (all exits being voluntary). There are a few cases where it is
2573 // rather silly to do operations on yourself, like resuming yourself or asking whether
2574 // you are alive. While these can still happen, they are not subject to deadlocks if
2575 // the lock is held while the operation occurs (this is not the case for suspend, for
2576 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2577 // implementation is local to this file, we always lock Threads_lock for that one.
2578
2579 static void thread_entry(JavaThread* thread, TRAPS) {
2580 HandleMark hm(THREAD);
2581 Handle obj(THREAD, thread->threadObj());
2582 JavaValue result(T_VOID);
2583 JavaCalls::call_virtual(&result,
2584 obj,
2585 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2586 vmSymbolHandles::run_method_name(),
2587 vmSymbolHandles::void_method_signature(),
2588 THREAD);
2589 }
2590
2591
2592 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2593 JVMWrapper("JVM_StartThread");
2594 JavaThread *native_thread = NULL;
2595
2596 // We cannot hold the Threads_lock when we throw an exception,
2597 // due to rank ordering issues. Example: we might need to grab the
2598 // Heap_lock while we construct the exception.
2599 bool throw_illegal_thread_state = false;
2600
2601 // We must release the Threads_lock before we can post a jvmti event
2602 // in Thread::start.
2603 {
2604 // Ensure that the C++ Thread and OSThread structures aren't freed before
2605 // we operate.
2606 MutexLocker mu(Threads_lock);
2607
2608 // Check to see if we're running a thread that's already exited or was
2609 // stopped (is_stillborn) or is still active (thread is not NULL).
2610 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2611 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2612 throw_illegal_thread_state = true;
2613 } else {
2614 jlong size =
2615 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2616 // Allocate the C++ Thread structure and create the native thread. The
2617 // stack size retrieved from java is signed, but the constructor takes
2618 // size_t (an unsigned type), so avoid passing negative values which would
2619 // result in really large stacks.
2620 size_t sz = size > 0 ? (size_t) size : 0;
2621 native_thread = new JavaThread(&thread_entry, sz);
2622
2623 // At this point it may be possible that no osthread was created for the
2624 // JavaThread due to lack of memory. Check for this situation and throw
2625 // an exception if necessary. Eventually we may want to change this so
2626 // that we only grab the lock if the thread was created successfully -
2627 // then we can also do this check and throw the exception in the
2628 // JavaThread constructor.
2629 if (native_thread->osthread() != NULL) {
2630 // Note: the current thread is not being used within "prepare".
2631 native_thread->prepare(jthread);
2632 }
2633 }
2634 }
2635
2636 if (throw_illegal_thread_state) {
2637 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2638 }
2639
2640 assert(native_thread != NULL, "Starting null thread?");
2641
2642 if (native_thread->osthread() == NULL) {
2643 // No one should hold a reference to the 'native_thread'.
2644 delete native_thread;
2645 if (JvmtiExport::should_post_resource_exhausted()) {
2646 JvmtiExport::post_resource_exhausted(
2647 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2648 "unable to create new native thread");
2649 }
2650 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2651 "unable to create new native thread");
2652 }
2653
2654 Thread::start(native_thread);
2655
2656 JVM_END
2657
2658 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2659 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2660 // but is thought to be reliable and simple. In the case, where the receiver is the
2661 // save thread as the sender, no safepoint is needed.
2662 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2663 JVMWrapper("JVM_StopThread");
2664
2665 oop java_throwable = JNIHandles::resolve(throwable);
2666 if (java_throwable == NULL) {
2667 THROW(vmSymbols::java_lang_NullPointerException());
2668 }
2669 oop java_thread = JNIHandles::resolve_non_null(jthread);
2670 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2671 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2672 // First check if thread already exited
2673 if (receiver != NULL) {
2674 // Check if exception is getting thrown at self (use oop equality, since the
2675 // target object might exit)
2676 if (java_thread == thread->threadObj()) {
2677 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2678 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2679 // threads from being restarted.
2680 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2681 // any effect on the "liveness" of a thread; see
2682 // JVM_IsThreadAlive, below.
2683 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2684 java_lang_Thread::set_stillborn(java_thread);
2685 }
2686 THROW_OOP(java_throwable);
2687 } else {
2688 // Enques a VM_Operation to stop all threads and then deliver the exception...
2689 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2690 }
2691 }
2692 JVM_END
2693
2694
2695 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2696 JVMWrapper("JVM_IsThreadAlive");
2697
2698 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2699 return java_lang_Thread::is_alive(thread_oop);
2700 JVM_END
2701
2702
2703 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2704 JVMWrapper("JVM_SuspendThread");
2705 oop java_thread = JNIHandles::resolve_non_null(jthread);
2706 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2707
2708 if (receiver != NULL) {
2709 // thread has run and has not exited (still on threads list)
2710
2711 {
2712 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2713 if (receiver->is_external_suspend()) {
2714 // Don't allow nested external suspend requests. We can't return
2715 // an error from this interface so just ignore the problem.
2716 return;
2717 }
2718 if (receiver->is_exiting()) { // thread is in the process of exiting
2719 return;
2720 }
2721 receiver->set_external_suspend();
2722 }
2723
2724 // java_suspend() will catch threads in the process of exiting
2725 // and will ignore them.
2726 receiver->java_suspend();
2727
2728 // It would be nice to have the following assertion in all the
2729 // time, but it is possible for a racing resume request to have
2730 // resumed this thread right after we suspended it. Temporarily
2731 // enable this assertion if you are chasing a different kind of
2732 // bug.
2733 //
2734 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2735 // receiver->is_being_ext_suspended(), "thread is not suspended");
2736 }
2737 JVM_END
2738
2739
2740 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2741 JVMWrapper("JVM_ResumeThread");
2742 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2743 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2744 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2745 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2746 // looks at it.
2747 MutexLocker ml(Threads_lock);
2748 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2749 if (thr != NULL) {
2750 // the thread has run and is not in the process of exiting
2751 thr->java_resume();
2752 }
2753 JVM_END
2754
2755
2756 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2757 JVMWrapper("JVM_SetThreadPriority");
2758 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2759 MutexLocker ml(Threads_lock);
2760 oop java_thread = JNIHandles::resolve_non_null(jthread);
2761 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2762 JavaThread* thr = java_lang_Thread::thread(java_thread);
2763 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2764 Thread::set_priority(thr, (ThreadPriority)prio);
2765 }
2766 JVM_END
2767
2768
2769 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2770 JVMWrapper("JVM_Yield");
2771 if (os::dont_yield()) return;
2772 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2773 // Critical for similar threading behaviour
2774 if (ConvertYieldToSleep) {
2775 os::sleep(thread, MinSleepInterval, false);
2776 } else {
2777 os::yield();
2778 }
2779 JVM_END
2780
2781
2782 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2783 JVMWrapper("JVM_Sleep");
2784
2785 if (millis < 0) {
2786 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2787 }
2788
2789 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2790 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2791 }
2792
2793 // Save current thread state and restore it at the end of this block.
2794 // And set new thread state to SLEEPING.
2795 JavaThreadSleepState jtss(thread);
2796
2797 if (millis == 0) {
2798 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2799 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2800 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2801 // for SOLARIS
2802 if (ConvertSleepToYield) {
2803 os::yield();
2804 } else {
2805 ThreadState old_state = thread->osthread()->get_state();
2806 thread->osthread()->set_state(SLEEPING);
2807 os::sleep(thread, MinSleepInterval, false);
2808 thread->osthread()->set_state(old_state);
2809 }
2810 } else {
2811 ThreadState old_state = thread->osthread()->get_state();
2812 thread->osthread()->set_state(SLEEPING);
2813 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2814 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2815 // us while we were sleeping. We do not overwrite those.
2816 if (!HAS_PENDING_EXCEPTION) {
2817 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2818 // to properly restore the thread state. That's likely wrong.
2819 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2820 }
2821 }
2822 thread->osthread()->set_state(old_state);
2823 }
2824 JVM_END
2825
2826 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2827 JVMWrapper("JVM_CurrentThread");
2828 oop jthread = thread->threadObj();
2829 assert (thread != NULL, "no current thread!");
2830 return JNIHandles::make_local(env, jthread);
2831 JVM_END
2832
2833
2834 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2835 JVMWrapper("JVM_CountStackFrames");
2836
2837 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2838 oop java_thread = JNIHandles::resolve_non_null(jthread);
2839 bool throw_illegal_thread_state = false;
2840 int count = 0;
2841
2842 {
2843 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2844 // We need to re-resolve the java_thread, since a GC might have happened during the
2845 // acquire of the lock
2846 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2847
2848 if (thr == NULL) {
2849 // do nothing
2850 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2851 // Check whether this java thread has been suspended already. If not, throws
2852 // IllegalThreadStateException. We defer to throw that exception until
2853 // Threads_lock is released since loading exception class has to leave VM.
2854 // The correct way to test a thread is actually suspended is
2855 // wait_for_ext_suspend_completion(), but we can't call that while holding
2856 // the Threads_lock. The above tests are sufficient for our purposes
2857 // provided the walkability of the stack is stable - which it isn't
2858 // 100% but close enough for most practical purposes.
2859 throw_illegal_thread_state = true;
2860 } else {
2861 // Count all java activation, i.e., number of vframes
2862 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2863 // Native frames are not counted
2864 if (!vfst.method()->is_native()) count++;
2865 }
2866 }
2867 }
2868
2869 if (throw_illegal_thread_state) {
2870 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2871 "this thread is not suspended");
2872 }
2873 return count;
2874 JVM_END
2875
2876 // Consider: A better way to implement JVM_Interrupt() is to acquire
2877 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2878 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2879 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2880 // outside the critical section. Threads_lock is hot so we want to minimize
2881 // the hold-time. A cleaner interface would be to decompose interrupt into
2882 // two steps. The 1st phase, performed under Threads_lock, would return
2883 // a closure that'd be invoked after Threads_lock was dropped.
2884 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2885 // admit spurious wakeups.
2886
2887 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2888 JVMWrapper("JVM_Interrupt");
2889
2890 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2891 oop java_thread = JNIHandles::resolve_non_null(jthread);
2892 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2893 // We need to re-resolve the java_thread, since a GC might have happened during the
2894 // acquire of the lock
2895 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2896 if (thr != NULL) {
2897 Thread::interrupt(thr);
2898 }
2899 JVM_END
2900
2901
2902 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2903 JVMWrapper("JVM_IsInterrupted");
2904
2905 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2906 oop java_thread = JNIHandles::resolve_non_null(jthread);
2907 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2908 // We need to re-resolve the java_thread, since a GC might have happened during the
2909 // acquire of the lock
2910 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2911 if (thr == NULL) {
2912 return JNI_FALSE;
2913 } else {
2914 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2915 }
2916 JVM_END
2917
2918
2919 // Return true iff the current thread has locked the object passed in
2920
2921 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2922 JVMWrapper("JVM_HoldsLock");
2923 assert(THREAD->is_Java_thread(), "sanity check");
2924 if (obj == NULL) {
2925 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2926 }
2927 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2928 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2929 JVM_END
2930
2931
2932 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2933 JVMWrapper("JVM_DumpAllStacks");
2934 VM_PrintThreads op;
2935 VMThread::execute(&op);
2936 if (JvmtiExport::should_post_data_dump()) {
2937 JvmtiExport::post_data_dump();
2938 }
2939 JVM_END
2940
2941
2942 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2943
2944 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2945 assert(jthread->is_Java_thread(), "must be a Java thread");
2946 if (jthread->privileged_stack_top() == NULL) return false;
2947 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2948 oop loader = jthread->privileged_stack_top()->class_loader();
2949 if (loader == NULL) return true;
2950 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2951 if (trusted) return true;
2952 }
2953 return false;
2954 }
2955
2956 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2957 JVMWrapper("JVM_CurrentLoadedClass");
2958 ResourceMark rm(THREAD);
2959
2960 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2961 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2962 bool trusted = is_trusted_frame(thread, &vfst);
2963 if (trusted) return NULL;
2964
2965 methodOop m = vfst.method();
2966 if (!m->is_native()) {
2967 klassOop holder = m->method_holder();
2968 oop loader = instanceKlass::cast(holder)->class_loader();
2969 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2970 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2971 }
2972 }
2973 }
2974 return NULL;
2975 JVM_END
2976
2977
2978 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2979 JVMWrapper("JVM_CurrentClassLoader");
2980 ResourceMark rm(THREAD);
2981
2982 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2983
2984 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2985 bool trusted = is_trusted_frame(thread, &vfst);
2986 if (trusted) return NULL;
2987
2988 methodOop m = vfst.method();
2989 if (!m->is_native()) {
2990 klassOop holder = m->method_holder();
2991 assert(holder->is_klass(), "just checking");
2992 oop loader = instanceKlass::cast(holder)->class_loader();
2993 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2994 return JNIHandles::make_local(env, loader);
2995 }
2996 }
2997 }
2998 return NULL;
2999 JVM_END
3000
3001
3002 // Utility object for collecting method holders walking down the stack
3003 class KlassLink: public ResourceObj {
3004 public:
3005 KlassHandle klass;
3006 KlassLink* next;
3007
3008 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3009 };
3010
3011
3012 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3013 JVMWrapper("JVM_GetClassContext");
3014 ResourceMark rm(THREAD);
3015 JvmtiVMObjectAllocEventCollector oam;
3016 // Collect linked list of (handles to) method holders
3017 KlassLink* first = NULL;
3018 KlassLink* last = NULL;
3019 int depth = 0;
3020
3021 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3022 // Native frames are not returned
3023 if (!vfst.method()->is_native()) {
3024 klassOop holder = vfst.method()->method_holder();
3025 assert(holder->is_klass(), "just checking");
3026 depth++;
3027 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3028 if (first == NULL) {
3029 first = last = l;
3030 } else {
3031 last->next = l;
3032 last = l;
3033 }
3034 }
3035 }
3036
3037 // Create result array of type [Ljava/lang/Class;
3038 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
3039 // Fill in mirrors corresponding to method holders
3040 int index = 0;
3041 while (first != NULL) {
3042 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3043 first = first->next;
3044 }
3045 assert(index == depth, "just checking");
3046
3047 return (jobjectArray) JNIHandles::make_local(env, result);
3048 JVM_END
3049
3050
3051 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3052 JVMWrapper("JVM_ClassDepth");
3053 ResourceMark rm(THREAD);
3054 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3055 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3056
3057 const char* str = java_lang_String::as_utf8_string(class_name_str());
3058 symbolHandle class_name_sym =
3059 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
3060 if (class_name_sym.is_null()) {
3061 return -1;
3062 }
3063
3064 int depth = 0;
3065
3066 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3067 if (!vfst.method()->is_native()) {
3068 klassOop holder = vfst.method()->method_holder();
3069 assert(holder->is_klass(), "just checking");
3070 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
3071 return depth;
3072 }
3073 depth++;
3074 }
3075 }
3076 return -1;
3077 JVM_END
3078
3079
3080 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3081 JVMWrapper("JVM_ClassLoaderDepth");
3082 ResourceMark rm(THREAD);
3083 int depth = 0;
3084 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3085 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3086 bool trusted = is_trusted_frame(thread, &vfst);
3087 if (trusted) return -1;
3088
3089 methodOop m = vfst.method();
3090 if (!m->is_native()) {
3091 klassOop holder = m->method_holder();
3092 assert(holder->is_klass(), "just checking");
3093 oop loader = instanceKlass::cast(holder)->class_loader();
3094 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3095 return depth;
3096 }
3097 depth++;
3098 }
3099 }
3100 return -1;
3101 JVM_END
3102
3103
3104 // java.lang.Package ////////////////////////////////////////////////////////////////
3105
3106
3107 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3108 JVMWrapper("JVM_GetSystemPackage");
3109 ResourceMark rm(THREAD);
3110 JvmtiVMObjectAllocEventCollector oam;
3111 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3112 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3113 return (jstring) JNIHandles::make_local(result);
3114 JVM_END
3115
3116
3117 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3118 JVMWrapper("JVM_GetSystemPackages");
3119 JvmtiVMObjectAllocEventCollector oam;
3120 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3121 return (jobjectArray) JNIHandles::make_local(result);
3122 JVM_END
3123
3124
3125 // ObjectInputStream ///////////////////////////////////////////////////////////////
3126
3127 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3128 if (current_class == NULL) {
3129 return true;
3130 }
3131 if ((current_class == field_class) || access.is_public()) {
3132 return true;
3133 }
3134
3135 if (access.is_protected()) {
3136 // See if current_class is a subclass of field_class
3137 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3138 return true;
3139 }
3140 }
3141
3142 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3143 }
3144
3145
3146 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3147 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3148 JVMWrapper("JVM_AllocateNewObject");
3149 JvmtiVMObjectAllocEventCollector oam;
3150 // Receiver is not used
3151 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3152 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3153
3154 // Cannot instantiate primitive types
3155 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3156 ResourceMark rm(THREAD);
3157 THROW_0(vmSymbols::java_lang_InvalidClassException());
3158 }
3159
3160 // Arrays not allowed here, must use JVM_AllocateNewArray
3161 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3162 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3163 ResourceMark rm(THREAD);
3164 THROW_0(vmSymbols::java_lang_InvalidClassException());
3165 }
3166
3167 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3168 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3169
3170 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3171
3172 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3173 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3174
3175 // Make sure klass is initialized, since we are about to instantiate one of them.
3176 curr_klass->initialize(CHECK_NULL);
3177
3178 methodHandle m (THREAD,
3179 init_klass->find_method(vmSymbols::object_initializer_name(),
3180 vmSymbols::void_method_signature()));
3181 if (m.is_null()) {
3182 ResourceMark rm(THREAD);
3183 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3184 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3185 vmSymbols::object_initializer_name(),
3186 vmSymbols::void_method_signature()));
3187 }
3188
3189 if (curr_klass == init_klass && !m->is_public()) {
3190 // Calling the constructor for class 'curr_klass'.
3191 // Only allow calls to a public no-arg constructor.
3192 // This path corresponds to creating an Externalizable object.
3193 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3194 }
3195
3196 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3197 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3198 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3199 }
3200
3201 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3202 // Call constructor m. This might call a constructor higher up in the hierachy
3203 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3204
3205 return JNIHandles::make_local(obj());
3206 JVM_END
3207
3208
3209 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3210 JVMWrapper("JVM_AllocateNewArray");
3211 JvmtiVMObjectAllocEventCollector oam;
3212 oop mirror = JNIHandles::resolve_non_null(currClass);
3213
3214 if (java_lang_Class::is_primitive(mirror)) {
3215 THROW_0(vmSymbols::java_lang_InvalidClassException());
3216 }
3217 klassOop k = java_lang_Class::as_klassOop(mirror);
3218 oop result;
3219
3220 if (k->klass_part()->oop_is_typeArray()) {
3221 // typeArray
3222 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3223 } else if (k->klass_part()->oop_is_objArray()) {
3224 // objArray
3225 objArrayKlassHandle oak(THREAD, k);
3226 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3227 result = oak->allocate(length, CHECK_NULL);
3228 } else {
3229 THROW_0(vmSymbols::java_lang_InvalidClassException());
3230 }
3231 return JNIHandles::make_local(env, result);
3232 JVM_END
3233
3234
3235 // Return the first non-null class loader up the execution stack, or null
3236 // if only code from the null class loader is on the stack.
3237
3238 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3239 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3240 // UseNewReflection
3241 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3242 klassOop holder = vfst.method()->method_holder();
3243 oop loader = instanceKlass::cast(holder)->class_loader();
3244 if (loader != NULL) {
3245 return JNIHandles::make_local(env, loader);
3246 }
3247 }
3248 return NULL;
3249 JVM_END
3250
3251
3252 // Load a class relative to the most recent class on the stack with a non-null
3253 // classloader.
3254 // This function has been deprecated and should not be considered part of the
3255 // specified JVM interface.
3256
3257 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3258 jclass currClass, jstring currClassName))
3259 JVMWrapper("JVM_LoadClass0");
3260 // Receiver is not used
3261 ResourceMark rm(THREAD);
3262
3263 // Class name argument is not guaranteed to be in internal format
3264 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3265 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3266
3267 const char* str = java_lang_String::as_utf8_string(string());
3268
3269 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3270 // It's impossible to create this class; the name cannot fit
3271 // into the constant pool.
3272 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3273 }
3274
3275 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3276 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3277 // Find the most recent class on the stack with a non-null classloader
3278 oop loader = NULL;
3279 oop protection_domain = NULL;
3280 if (curr_klass.is_null()) {
3281 for (vframeStream vfst(thread);
3282 !vfst.at_end() && loader == NULL;
3283 vfst.next()) {
3284 if (!vfst.method()->is_native()) {
3285 klassOop holder = vfst.method()->method_holder();
3286 loader = instanceKlass::cast(holder)->class_loader();
3287 protection_domain = instanceKlass::cast(holder)->protection_domain();
3288 }
3289 }
3290 } else {
3291 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3292 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3293 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3294 }
3295 Handle h_loader(THREAD, loader);
3296 Handle h_prot (THREAD, protection_domain);
3297 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3298 false, thread);
3299 if (TraceClassResolution && result != NULL) {
3300 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3301 }
3302 return result;
3303 JVM_END
3304
3305
3306 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3307
3308
3309 // resolve array handle and check arguments
3310 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3311 if (arr == NULL) {
3312 THROW_0(vmSymbols::java_lang_NullPointerException());
3313 }
3314 oop a = JNIHandles::resolve_non_null(arr);
3315 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3316 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3317 }
3318 return arrayOop(a);
3319 }
3320
3321
3322 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3323 JVMWrapper("JVM_GetArrayLength");
3324 arrayOop a = check_array(env, arr, false, CHECK_0);
3325 return a->length();
3326 JVM_END
3327
3328
3329 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3330 JVMWrapper("JVM_Array_Get");
3331 JvmtiVMObjectAllocEventCollector oam;
3332 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3333 jvalue value;
3334 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3335 oop box = Reflection::box(&value, type, CHECK_NULL);
3336 return JNIHandles::make_local(env, box);
3337 JVM_END
3338
3339
3340 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3341 JVMWrapper("JVM_GetPrimitiveArrayElement");
3342 jvalue value;
3343 value.i = 0; // to initialize value before getting used in CHECK
3344 arrayOop a = check_array(env, arr, true, CHECK_(value));
3345 assert(a->is_typeArray(), "just checking");
3346 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3347 BasicType wide_type = (BasicType) wCode;
3348 if (type != wide_type) {
3349 Reflection::widen(&value, type, wide_type, CHECK_(value));
3350 }
3351 return value;
3352 JVM_END
3353
3354
3355 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3356 JVMWrapper("JVM_SetArrayElement");
3357 arrayOop a = check_array(env, arr, false, CHECK);
3358 oop box = JNIHandles::resolve(val);
3359 jvalue value;
3360 value.i = 0; // to initialize value before getting used in CHECK
3361 BasicType value_type;
3362 if (a->is_objArray()) {
3363 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3364 value_type = Reflection::unbox_for_regular_object(box, &value);
3365 } else {
3366 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3367 }
3368 Reflection::array_set(&value, a, index, value_type, CHECK);
3369 JVM_END
3370
3371
3372 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3373 JVMWrapper("JVM_SetPrimitiveArrayElement");
3374 arrayOop a = check_array(env, arr, true, CHECK);
3375 assert(a->is_typeArray(), "just checking");
3376 BasicType value_type = (BasicType) vCode;
3377 Reflection::array_set(&v, a, index, value_type, CHECK);
3378 JVM_END
3379
3380
3381 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3382 JVMWrapper("JVM_NewArray");
3383 JvmtiVMObjectAllocEventCollector oam;
3384 oop element_mirror = JNIHandles::resolve(eltClass);
3385 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3386 return JNIHandles::make_local(env, result);
3387 JVM_END
3388
3389
3390 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3391 JVMWrapper("JVM_NewMultiArray");
3392 JvmtiVMObjectAllocEventCollector oam;
3393 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3394 oop element_mirror = JNIHandles::resolve(eltClass);
3395 assert(dim_array->is_typeArray(), "just checking");
3396 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3397 return JNIHandles::make_local(env, result);
3398 JVM_END
3399
3400
3401 // Networking library support ////////////////////////////////////////////////////////////////////
3402
3403 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3404 JVMWrapper("JVM_InitializeSocketLibrary");
3405 return hpi::initialize_socket_library();
3406 JVM_END
3407
3408
3409 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3410 JVMWrapper("JVM_Socket");
3411 return hpi::socket(domain, type, protocol);
3412 JVM_END
3413
3414
3415 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3416 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3417 //%note jvm_r6
3418 return hpi::socket_close(fd);
3419 JVM_END
3420
3421
3422 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3423 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3424 //%note jvm_r6
3425 return hpi::socket_shutdown(fd, howto);
3426 JVM_END
3427
3428
3429 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3430 JVMWrapper2("JVM_Recv (0x%x)", fd);
3431 //%note jvm_r6
3432 return hpi::recv(fd, buf, nBytes, flags);
3433 JVM_END
3434
3435
3436 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3437 JVMWrapper2("JVM_Send (0x%x)", fd);
3438 //%note jvm_r6
3439 return hpi::send(fd, buf, nBytes, flags);
3440 JVM_END
3441
3442
3443 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3444 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3445 //%note jvm_r6
3446 return hpi::timeout(fd, timeout);
3447 JVM_END
3448
3449
3450 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3451 JVMWrapper2("JVM_Listen (0x%x)", fd);
3452 //%note jvm_r6
3453 return hpi::listen(fd, count);
3454 JVM_END
3455
3456
3457 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3458 JVMWrapper2("JVM_Connect (0x%x)", fd);
3459 //%note jvm_r6
3460 return hpi::connect(fd, him, len);
3461 JVM_END
3462
3463
3464 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3465 JVMWrapper2("JVM_Bind (0x%x)", fd);
3466 //%note jvm_r6
3467 return hpi::bind(fd, him, len);
3468 JVM_END
3469
3470
3471 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3472 JVMWrapper2("JVM_Accept (0x%x)", fd);
3473 //%note jvm_r6
3474 return hpi::accept(fd, him, (int *)len);
3475 JVM_END
3476
3477
3478 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3479 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3480 //%note jvm_r6
3481 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3482 JVM_END
3483
3484
3485 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3486 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3487 //%note jvm_r6
3488 return hpi::get_sock_name(fd, him, len);
3489 JVM_END
3490
3491
3492 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3493 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3494 //%note jvm_r6
3495 return hpi::sendto(fd, buf, len, flags, to, tolen);
3496 JVM_END
3497
3498
3499 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3500 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3501 //%note jvm_r6
3502 return hpi::socket_available(fd, pbytes);
3503 JVM_END
3504
3505
3506 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3507 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3508 //%note jvm_r6
3509 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3510 JVM_END
3511
3512
3513 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3514 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3515 //%note jvm_r6
3516 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3517 JVM_END
3518
3519 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3520 JVMWrapper("JVM_GetHostName");
3521 return hpi::get_host_name(name, namelen);
3522 JVM_END
3523
3524 #ifdef _WINDOWS
3525
3526 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3527 JVMWrapper("JVM_GetHostByAddr");
3528 return hpi::get_host_by_addr(name, len, type);
3529 JVM_END
3530
3531
3532 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3533 JVMWrapper("JVM_GetHostByName");
3534 return hpi::get_host_by_name(name);
3535 JVM_END
3536
3537
3538 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3539 JVMWrapper("JVM_GetProtoByName");
3540 return hpi::get_proto_by_name(name);
3541 JVM_END
3542
3543 #endif
3544
3545 // Library support ///////////////////////////////////////////////////////////////////////////
3546
3547 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3548 //%note jvm_ct
3549 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3550 char ebuf[1024];
3551 void *load_result;
3552 {
3553 ThreadToNativeFromVM ttnfvm(thread);
3554 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3555 }
3556 if (load_result == NULL) {
3557 char msg[1024];
3558 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3559 // Since 'ebuf' may contain a string encoded using
3560 // platform encoding scheme, we need to pass
3561 // Exceptions::unsafe_to_utf8 to the new_exception method
3562 // as the last argument. See bug 6367357.
3563 Handle h_exception =
3564 Exceptions::new_exception(thread,
3565 vmSymbols::java_lang_UnsatisfiedLinkError(),
3566 msg, Exceptions::unsafe_to_utf8);
3567
3568 THROW_HANDLE_0(h_exception);
3569 }
3570 return load_result;
3571 JVM_END
3572
3573
3574 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3575 JVMWrapper("JVM_UnloadLibrary");
3576 hpi::dll_unload(handle);
3577 JVM_END
3578
3579
3580 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3581 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3582 return hpi::dll_lookup(handle, name);
3583 JVM_END
3584
3585 // Floating point support ////////////////////////////////////////////////////////////////////
3586
3587 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3588 JVMWrapper("JVM_IsNaN");
3589 return g_isnan(a);
3590 JVM_END
3591
3592
3593
3594 // JNI version ///////////////////////////////////////////////////////////////////////////////
3595
3596 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3597 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3598 return Threads::is_supported_jni_version_including_1_1(version);
3599 JVM_END
3600
3601
3602 // String support ///////////////////////////////////////////////////////////////////////////
3603
3604 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3605 JVMWrapper("JVM_InternString");
3606 JvmtiVMObjectAllocEventCollector oam;
3607 if (str == NULL) return NULL;
3608 oop string = JNIHandles::resolve_non_null(str);
3609 oop result = StringTable::intern(string, CHECK_NULL);
3610 return (jstring) JNIHandles::make_local(env, result);
3611 JVM_END
3612
3613
3614 // Raw monitor support //////////////////////////////////////////////////////////////////////
3615
3616 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3617 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3618 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3619 // that only works with java threads.
3620
3621
3622 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3623 VM_Exit::block_if_vm_exited();
3624 JVMWrapper("JVM_RawMonitorCreate");
3625 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3626 }
3627
3628
3629 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3630 VM_Exit::block_if_vm_exited();
3631 JVMWrapper("JVM_RawMonitorDestroy");
3632 delete ((Mutex*) mon);
3633 }
3634
3635
3636 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3637 VM_Exit::block_if_vm_exited();
3638 JVMWrapper("JVM_RawMonitorEnter");
3639 ((Mutex*) mon)->jvm_raw_lock();
3640 return 0;
3641 }
3642
3643
3644 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3645 VM_Exit::block_if_vm_exited();
3646 JVMWrapper("JVM_RawMonitorExit");
3647 ((Mutex*) mon)->jvm_raw_unlock();
3648 }
3649
3650
3651 // Support for Serialization
3652
3653 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3654 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3655 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3656 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3657
3658 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3659 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3660 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3661 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3662
3663
3664 void initialize_converter_functions() {
3665 if (JDK_Version::is_gte_jdk14x_version()) {
3666 // These functions only exist for compatibility with 1.3.1 and earlier
3667 return;
3668 }
3669
3670 // called from universe_post_init()
3671 assert(
3672 int_bits_to_float_fn == NULL &&
3673 long_bits_to_double_fn == NULL &&
3674 float_to_int_bits_fn == NULL &&
3675 double_to_long_bits_fn == NULL ,
3676 "initialization done twice"
3677 );
3678 // initialize
3679 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3680 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3681 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3682 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3683 // verify
3684 assert(
3685 int_bits_to_float_fn != NULL &&
3686 long_bits_to_double_fn != NULL &&
3687 float_to_int_bits_fn != NULL &&
3688 double_to_long_bits_fn != NULL ,
3689 "initialization failed"
3690 );
3691 }
3692
3693
3694 // Serialization
3695 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3696 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3697 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3698
3699 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3700 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3701 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3702 oop o = JNIHandles::resolve(obj);
3703
3704 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3705 THROW(vmSymbols::java_lang_NullPointerException());
3706 }
3707
3708 jsize nfids = fids->length();
3709 if (nfids == 0) return;
3710
3711 if (tcodes->length() < nfids) {
3712 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3713 }
3714
3715 jsize off = 0;
3716 /* loop through fields, setting values */
3717 for (jsize i = 0; i < nfids; i++) {
3718 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3719 int field_offset;
3720 if (fid != NULL) {
3721 // NULL is a legal value for fid, but retrieving the field offset
3722 // trigger assertion in that case
3723 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3724 }
3725
3726 switch (tcodes->char_at(i)) {
3727 case 'Z':
3728 if (fid != NULL) {
3729 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3730 o->bool_field_put(field_offset, val);
3731 }
3732 off++;
3733 break;
3734
3735 case 'B':
3736 if (fid != NULL) {
3737 o->byte_field_put(field_offset, dbuf->byte_at(off));
3738 }
3739 off++;
3740 break;
3741
3742 case 'C':
3743 if (fid != NULL) {
3744 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3745 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3746 o->char_field_put(field_offset, val);
3747 }
3748 off += 2;
3749 break;
3750
3751 case 'S':
3752 if (fid != NULL) {
3753 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3754 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3755 o->short_field_put(field_offset, val);
3756 }
3757 off += 2;
3758 break;
3759
3760 case 'I':
3761 if (fid != NULL) {
3762 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3763 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3764 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3765 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3766 o->int_field_put(field_offset, ival);
3767 }
3768 off += 4;
3769 break;
3770
3771 case 'F':
3772 if (fid != NULL) {
3773 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3774 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3775 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3776 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3777 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3778 o->float_field_put(field_offset, fval);
3779 }
3780 off += 4;
3781 break;
3782
3783 case 'J':
3784 if (fid != NULL) {
3785 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3786 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3787 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3788 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3789 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3790 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3791 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3792 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3793 o->long_field_put(field_offset, lval);
3794 }
3795 off += 8;
3796 break;
3797
3798 case 'D':
3799 if (fid != NULL) {
3800 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3801 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3802 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3803 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3804 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3805 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3806 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3807 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3808 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3809 o->double_field_put(field_offset, dval);
3810 }
3811 off += 8;
3812 break;
3813
3814 default:
3815 // Illegal typecode
3816 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3817 }
3818 }
3819 JVM_END
3820
3821
3822 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3823 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3824 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3825
3826 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3827 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3828 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3829 oop o = JNIHandles::resolve(obj);
3830
3831 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3832 THROW(vmSymbols::java_lang_NullPointerException());
3833 }
3834
3835 jsize nfids = fids->length();
3836 if (nfids == 0) return;
3837
3838 if (tcodes->length() < nfids) {
3839 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3840 }
3841
3842 /* loop through fields, fetching values */
3843 jsize off = 0;
3844 for (jsize i = 0; i < nfids; i++) {
3845 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3846 if (fid == NULL) {
3847 THROW(vmSymbols::java_lang_NullPointerException());
3848 }
3849 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3850
3851 switch (tcodes->char_at(i)) {
3852 case 'Z':
3853 {
3854 jboolean val = o->bool_field(field_offset);
3855 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3856 }
3857 break;
3858
3859 case 'B':
3860 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3861 break;
3862
3863 case 'C':
3864 {
3865 jchar val = o->char_field(field_offset);
3866 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3867 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3868 }
3869 break;
3870
3871 case 'S':
3872 {
3873 jshort val = o->short_field(field_offset);
3874 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3875 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3876 }
3877 break;
3878
3879 case 'I':
3880 {
3881 jint val = o->int_field(field_offset);
3882 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3883 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3884 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3885 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3886 }
3887 break;
3888
3889 case 'F':
3890 {
3891 jfloat fval = o->float_field(field_offset);
3892 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3893 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3894 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3895 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3896 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3897 }
3898 break;
3899
3900 case 'J':
3901 {
3902 jlong val = o->long_field(field_offset);
3903 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3904 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3905 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3906 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3907 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3908 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3909 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3910 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3911 }
3912 break;
3913
3914 case 'D':
3915 {
3916 jdouble dval = o->double_field(field_offset);
3917 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3918 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3919 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3920 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3921 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3922 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3923 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3924 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3925 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3926 }
3927 break;
3928
3929 default:
3930 // Illegal typecode
3931 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3932 }
3933 }
3934 JVM_END
3935
3936
3937 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3938
3939 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3940 // Security Note:
3941 // The Java level wrapper will perform the necessary security check allowing
3942 // us to pass the NULL as the initiating class loader.
3943 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3944
3945 KlassHandle klass_handle(THREAD, klass);
3946 // Check if we should initialize the class
3947 if (init && klass_handle->oop_is_instance()) {
3948 klass_handle->initialize(CHECK_NULL);
3949 }
3950 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3951 }
3952
3953
3954 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3955
3956 #ifndef PRODUCT
3957
3958 extern "C" {
3959 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3960 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3961 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3962 }
3963
3964 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3965 JVMWrapper("JVM_AccessBoolVMFlag");
3966 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3967 JVM_END
3968
3969 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3970 JVMWrapper("JVM_AccessVMIntFlag");
3971 intx v;
3972 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3973 *value = (jint)v;
3974 return result;
3975 JVM_END
3976
3977
3978 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3979 JVMWrapper("JVM_VMBreakPoint");
3980 oop the_obj = JNIHandles::resolve(obj);
3981 BREAKPOINT;
3982 JVM_END
3983
3984
3985 #endif
3986
3987
3988 //---------------------------------------------------------------------------
3989 //
3990 // Support for old native code-based reflection (pre-JDK 1.4)
3991 // Disabled by default in the product build.
3992 //
3993 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3994 //
3995 //---------------------------------------------------------------------------
3996
3997 #ifdef SUPPORT_OLD_REFLECTION
3998
3999 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
4000 JVMWrapper("JVM_GetClassFields");
4001 JvmtiVMObjectAllocEventCollector oam;
4002 oop mirror = JNIHandles::resolve_non_null(cls);
4003 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
4004 return (jobjectArray) JNIHandles::make_local(env, result);
4005 JVM_END
4006
4007
4008 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
4009 JVMWrapper("JVM_GetClassMethods");
4010 JvmtiVMObjectAllocEventCollector oam;
4011 oop mirror = JNIHandles::resolve_non_null(cls);
4012 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
4013 //%note jvm_r4
4014 return (jobjectArray) JNIHandles::make_local(env, result);
4015 JVM_END
4016
4017
4018 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
4019 JVMWrapper("JVM_GetClassConstructors");
4020 JvmtiVMObjectAllocEventCollector oam;
4021 oop mirror = JNIHandles::resolve_non_null(cls);
4022 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
4023 //%note jvm_r4
4024 return (jobjectArray) JNIHandles::make_local(env, result);
4025 JVM_END
4026
4027
4028 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
4029 JVMWrapper("JVM_GetClassField");
4030 JvmtiVMObjectAllocEventCollector oam;
4031 if (name == NULL) return NULL;
4032 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4033
4034 const char* cstr = java_lang_String::as_utf8_string(str());
4035 symbolHandle field_name =
4036 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4037 if (field_name.is_null()) {
4038 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4039 }
4040
4041 oop mirror = JNIHandles::resolve_non_null(cls);
4042 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
4043 if (result == NULL) {
4044 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4045 }
4046 return JNIHandles::make_local(env, result);
4047 JVM_END
4048
4049
4050 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
4051 JVMWrapper("JVM_GetClassMethod");
4052 JvmtiVMObjectAllocEventCollector oam;
4053 if (name == NULL) {
4054 THROW_0(vmSymbols::java_lang_NullPointerException());
4055 }
4056 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4057
4058 const char* cstr = java_lang_String::as_utf8_string(str());
4059 symbolHandle method_name =
4060 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4061 if (method_name.is_null()) {
4062 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4063 }
4064
4065 oop mirror = JNIHandles::resolve_non_null(cls);
4066 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4067 oop result = Reflection::reflect_method(mirror, method_name, tarray,
4068 which, CHECK_NULL);
4069 if (result == NULL) {
4070 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4071 }
4072 return JNIHandles::make_local(env, result);
4073 JVM_END
4074
4075
4076 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
4077 JVMWrapper("JVM_GetClassConstructor");
4078 JvmtiVMObjectAllocEventCollector oam;
4079 oop mirror = JNIHandles::resolve_non_null(cls);
4080 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4081 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
4082 if (result == NULL) {
4083 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4084 }
4085 return (jobject) JNIHandles::make_local(env, result);
4086 JVM_END
4087
4088
4089 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4090
4091 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4092 JVMWrapper("JVM_NewInstance");
4093 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4094
4095 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4096 if (resolved_constructor == NULL) {
4097 klassOop k = java_lang_Class::as_klassOop(mirror());
4098 // The java.lang.Class object caches a resolved constructor if all the checks
4099 // below were done successfully and a constructor was found.
4100
4101 // Do class based checks
4102 if (java_lang_Class::is_primitive(mirror())) {
4103 const char* msg = "";
4104 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4105 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4106 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4107 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4108 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4109 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4110 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4111 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4112 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4113 }
4114
4115 // Check whether we are allowed to instantiate this class
4116 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4117 instanceKlassHandle klass(THREAD, k);
4118 // Make sure class is initialized (also so all methods are rewritten)
4119 klass->initialize(CHECK_NULL);
4120
4121 // Lookup default constructor
4122 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4123 if (resolved_constructor == NULL) {
4124 ResourceMark rm(THREAD);
4125 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4126 }
4127
4128 // Cache result in java.lang.Class object. Does not have to be MT safe.
4129 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4130 }
4131
4132 assert(resolved_constructor != NULL, "sanity check");
4133 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4134
4135 // We have an initialized instanceKlass with a default constructor
4136 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4137 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4138
4139 // Do security check
4140 klassOop caller_klass = NULL;
4141 if (UsePrivilegedStack) {
4142 caller_klass = thread->security_get_caller_class(2);
4143
4144 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4145 !Reflection::verify_field_access(caller_klass,
4146 klass(),
4147 klass(),
4148 constructor->access_flags(),
4149 false,
4150 true)) {
4151 ResourceMark rm(THREAD);
4152 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4153 }
4154 }
4155
4156 // Allocate object and call constructor
4157 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4158 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4159
4160 jobject res = JNIHandles::make_local(env, receiver());
4161 if (JvmtiExport::should_post_vm_object_alloc()) {
4162 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4163 }
4164 return res;
4165 JVM_END
4166
4167
4168 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4169
4170 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4171 JVMWrapper("JVM_GetField");
4172 JvmtiVMObjectAllocEventCollector oam;
4173 Handle field_mirror(thread, JNIHandles::resolve(field));
4174 Handle receiver (thread, JNIHandles::resolve(obj));
4175 fieldDescriptor fd;
4176 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4177 jvalue value;
4178 BasicType type = Reflection::field_get(&value, &fd, receiver);
4179 oop box = Reflection::box(&value, type, CHECK_NULL);
4180 return JNIHandles::make_local(env, box);
4181 JVM_END
4182
4183
4184 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4185 JVMWrapper("JVM_GetPrimitiveField");
4186 Handle field_mirror(thread, JNIHandles::resolve(field));
4187 Handle receiver (thread, JNIHandles::resolve(obj));
4188 fieldDescriptor fd;
4189 jvalue value;
4190 value.j = 0;
4191 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4192 BasicType type = Reflection::field_get(&value, &fd, receiver);
4193 BasicType wide_type = (BasicType) wCode;
4194 if (type != wide_type) {
4195 Reflection::widen(&value, type, wide_type, CHECK_(value));
4196 }
4197 return value;
4198 JVM_END // should really be JVM_END, but that doesn't work for union types!
4199
4200
4201 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4202 JVMWrapper("JVM_SetField");
4203 Handle field_mirror(thread, JNIHandles::resolve(field));
4204 Handle receiver (thread, JNIHandles::resolve(obj));
4205 oop box = JNIHandles::resolve(val);
4206 fieldDescriptor fd;
4207 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4208 BasicType field_type = fd.field_type();
4209 jvalue value;
4210 BasicType value_type;
4211 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4212 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4213 value_type = Reflection::unbox_for_regular_object(box, &value);
4214 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4215 } else {
4216 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4217 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4218 }
4219 JVM_END
4220
4221
4222 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4223 JVMWrapper("JVM_SetPrimitiveField");
4224 Handle field_mirror(thread, JNIHandles::resolve(field));
4225 Handle receiver (thread, JNIHandles::resolve(obj));
4226 fieldDescriptor fd;
4227 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4228 BasicType value_type = (BasicType) vCode;
4229 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4230 JVM_END
4231
4232
4233 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4234
4235 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4236 JVMWrapper("JVM_InvokeMethod");
4237 Handle method_handle;
4238 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4239 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4240 Handle receiver(THREAD, JNIHandles::resolve(obj));
4241 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4242 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4243 jobject res = JNIHandles::make_local(env, result);
4244 if (JvmtiExport::should_post_vm_object_alloc()) {
4245 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4246 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4247 if (java_lang_Class::is_primitive(ret_type)) {
4248 // Only for primitive type vm allocates memory for java object.
4249 // See box() method.
4250 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4251 }
4252 }
4253 return res;
4254 } else {
4255 THROW_0(vmSymbols::java_lang_StackOverflowError());
4256 }
4257 JVM_END
4258
4259
4260 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4261 JVMWrapper("JVM_NewInstanceFromConstructor");
4262 oop constructor_mirror = JNIHandles::resolve(c);
4263 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4264 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4265 jobject res = JNIHandles::make_local(env, result);
4266 if (JvmtiExport::should_post_vm_object_alloc()) {
4267 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4268 }
4269 return res;
4270 JVM_END
4271
4272 #endif /* SUPPORT_OLD_REFLECTION */
4273
4274 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4275
4276 JVM_LEAF(jboolean, JVM_SupportsCX8())
4277 JVMWrapper("JVM_SupportsCX8");
4278 return VM_Version::supports_cx8();
4279 JVM_END
4280
4281
4282 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4283 JVMWrapper("JVM_CX8Field");
4284 jlong res;
4285 oop o = JNIHandles::resolve(obj);
4286 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4287 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4288
4289 assert(VM_Version::supports_cx8(), "cx8 not supported");
4290 res = Atomic::cmpxchg(newVal, addr, oldVal);
4291
4292 return res == oldVal;
4293 JVM_END
4294
4295 // DTrace ///////////////////////////////////////////////////////////////////
4296
4297 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4298 JVMWrapper("JVM_DTraceGetVersion");
4299 return (jint)JVM_TRACING_DTRACE_VERSION;
4300 JVM_END
4301
4302 JVM_ENTRY(jlong,JVM_DTraceActivate(
4303 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4304 JVM_DTraceProvider* providers))
4305 JVMWrapper("JVM_DTraceActivate");
4306 return DTraceJSDT::activate(
4307 version, module_name, providers_count, providers, CHECK_0);
4308 JVM_END
4309
4310 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4311 JVMWrapper("JVM_DTraceIsProbeEnabled");
4312 return DTraceJSDT::is_probe_enabled(method);
4313 JVM_END
4314
4315 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4316 JVMWrapper("JVM_DTraceDispose");
4317 DTraceJSDT::dispose(handle);
4318 JVM_END
4319
4320 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4321 JVMWrapper("JVM_DTraceIsSupported");
4322 return DTraceJSDT::is_supported();
4323 JVM_END
4324
4325 // Returns an array of all live Thread objects (VM internal JavaThreads,
4326 // jvmti agent threads, and JNI attaching threads are skipped)
4327 // See CR 6404306 regarding JNI attaching threads
4328 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4329 ResourceMark rm(THREAD);
4330 ThreadsListEnumerator tle(THREAD, false, false);
4331 JvmtiVMObjectAllocEventCollector oam;
4332
4333 int num_threads = tle.num_threads();
4334 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4335 objArrayHandle threads_ah(THREAD, r);
4336
4337 for (int i = 0; i < num_threads; i++) {
4338 Handle h = tle.get_threadObj(i);
4339 threads_ah->obj_at_put(i, h());
4340 }
4341
4342 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4343 JVM_END
4344
4345
4346 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4347 // Return StackTraceElement[][], each element is the stack trace of a thread in
4348 // the corresponding entry in the given threads array
4349 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4350 JVMWrapper("JVM_DumpThreads");
4351 JvmtiVMObjectAllocEventCollector oam;
4352
4353 // Check if threads is null
4354 if (threads == NULL) {
4355 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4356 }
4357
4358 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4359 objArrayHandle ah(THREAD, a);
4360 int num_threads = ah->length();
4361 // check if threads is non-empty array
4362 if (num_threads == 0) {
4363 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4364 }
4365
4366 // check if threads is not an array of objects of Thread class
4367 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4368 if (k != SystemDictionary::thread_klass()) {
4369 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4370 }
4371
4372 ResourceMark rm(THREAD);
4373
4374 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4375 for (int i = 0; i < num_threads; i++) {
4376 oop thread_obj = ah->obj_at(i);
4377 instanceHandle h(THREAD, (instanceOop) thread_obj);
4378 thread_handle_array->append(h);
4379 }
4380
4381 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4382 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4383
4384 JVM_END
4385
4386 // JVM monitoring and management support
4387 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4388 return Management::get_jmm_interface(version);
4389 JVM_END
4390
4391 // com.sun.tools.attach.VirtualMachine agent properties support
4392 //
4393 // Initialize the agent properties with the properties maintained in the VM
4394 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4395 JVMWrapper("JVM_InitAgentProperties");
4396 ResourceMark rm;
4397
4398 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4399
4400 PUTPROP(props, "sun.java.command", Arguments::java_command());
4401 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4402 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4403 return properties;
4404 JVM_END
4405
4406 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4407 {
4408 JVMWrapper("JVM_GetEnclosingMethodInfo");
4409 JvmtiVMObjectAllocEventCollector oam;
4410
4411 if (ofClass == NULL) {
4412 return NULL;
4413 }
4414 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4415 // Special handling for primitive objects
4416 if (java_lang_Class::is_primitive(mirror())) {
4417 return NULL;
4418 }
4419 klassOop k = java_lang_Class::as_klassOop(mirror());
4420 if (!Klass::cast(k)->oop_is_instance()) {
4421 return NULL;
4422 }
4423 instanceKlassHandle ik_h(THREAD, k);
4424 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4425 if (encl_method_class_idx == 0) {
4426 return NULL;
4427 }
4428 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4429 objArrayHandle dest(THREAD, dest_o);
4430 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4431 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4432 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4433 if (encl_method_method_idx != 0) {
4434 symbolOop sym_o = ik_h->constants()->symbol_at(
4435 extract_low_short_from_int(
4436 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4437 symbolHandle sym(THREAD, sym_o);
4438 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4439 dest->obj_at_put(1, str());
4440 sym_o = ik_h->constants()->symbol_at(
4441 extract_high_short_from_int(
4442 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4443 sym = symbolHandle(THREAD, sym_o);
4444 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4445 dest->obj_at_put(2, str());
4446 }
4447 return (jobjectArray) JNIHandles::make_local(dest());
4448 }
4449 JVM_END
4450
4451 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4452 jint javaThreadState))
4453 {
4454 // If new thread states are added in future JDK and VM versions,
4455 // this should check if the JDK version is compatible with thread
4456 // states supported by the VM. Return NULL if not compatible.
4457 //
4458 // This function must map the VM java_lang_Thread::ThreadStatus
4459 // to the Java thread state that the JDK supports.
4460 //
4461
4462 typeArrayHandle values_h;
4463 switch (javaThreadState) {
4464 case JAVA_THREAD_STATE_NEW : {
4465 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4466 values_h = typeArrayHandle(THREAD, r);
4467 values_h->int_at_put(0, java_lang_Thread::NEW);
4468 break;
4469 }
4470 case JAVA_THREAD_STATE_RUNNABLE : {
4471 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4472 values_h = typeArrayHandle(THREAD, r);
4473 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4474 break;
4475 }
4476 case JAVA_THREAD_STATE_BLOCKED : {
4477 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4478 values_h = typeArrayHandle(THREAD, r);
4479 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4480 break;
4481 }
4482 case JAVA_THREAD_STATE_WAITING : {
4483 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4484 values_h = typeArrayHandle(THREAD, r);
4485 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4486 values_h->int_at_put(1, java_lang_Thread::PARKED);
4487 break;
4488 }
4489 case JAVA_THREAD_STATE_TIMED_WAITING : {
4490 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4491 values_h = typeArrayHandle(THREAD, r);
4492 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4493 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4494 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4495 break;
4496 }
4497 case JAVA_THREAD_STATE_TERMINATED : {
4498 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4499 values_h = typeArrayHandle(THREAD, r);
4500 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4501 break;
4502 }
4503 default:
4504 // Unknown state - probably incompatible JDK version
4505 return NULL;
4506 }
4507
4508 return (jintArray) JNIHandles::make_local(env, values_h());
4509 }
4510 JVM_END
4511
4512
4513 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4514 jint javaThreadState,
4515 jintArray values))
4516 {
4517 // If new thread states are added in future JDK and VM versions,
4518 // this should check if the JDK version is compatible with thread
4519 // states supported by the VM. Return NULL if not compatible.
4520 //
4521 // This function must map the VM java_lang_Thread::ThreadStatus
4522 // to the Java thread state that the JDK supports.
4523 //
4524
4525 ResourceMark rm;
4526
4527 // Check if threads is null
4528 if (values == NULL) {
4529 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4530 }
4531
4532 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4533 typeArrayHandle values_h(THREAD, v);
4534
4535 objArrayHandle names_h;
4536 switch (javaThreadState) {
4537 case JAVA_THREAD_STATE_NEW : {
4538 assert(values_h->length() == 1 &&
4539 values_h->int_at(0) == java_lang_Thread::NEW,
4540 "Invalid threadStatus value");
4541
4542 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4543 1, /* only 1 substate */
4544 CHECK_NULL);
4545 names_h = objArrayHandle(THREAD, r);
4546 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4547 names_h->obj_at_put(0, name());
4548 break;
4549 }
4550 case JAVA_THREAD_STATE_RUNNABLE : {
4551 assert(values_h->length() == 1 &&
4552 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4553 "Invalid threadStatus value");
4554
4555 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4556 1, /* only 1 substate */
4557 CHECK_NULL);
4558 names_h = objArrayHandle(THREAD, r);
4559 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4560 names_h->obj_at_put(0, name());
4561 break;
4562 }
4563 case JAVA_THREAD_STATE_BLOCKED : {
4564 assert(values_h->length() == 1 &&
4565 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4566 "Invalid threadStatus value");
4567
4568 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4569 1, /* only 1 substate */
4570 CHECK_NULL);
4571 names_h = objArrayHandle(THREAD, r);
4572 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4573 names_h->obj_at_put(0, name());
4574 break;
4575 }
4576 case JAVA_THREAD_STATE_WAITING : {
4577 assert(values_h->length() == 2 &&
4578 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4579 values_h->int_at(1) == java_lang_Thread::PARKED,
4580 "Invalid threadStatus value");
4581 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4582 2, /* number of substates */
4583 CHECK_NULL);
4584 names_h = objArrayHandle(THREAD, r);
4585 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4586 CHECK_NULL);
4587 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4588 CHECK_NULL);
4589 names_h->obj_at_put(0, name0());
4590 names_h->obj_at_put(1, name1());
4591 break;
4592 }
4593 case JAVA_THREAD_STATE_TIMED_WAITING : {
4594 assert(values_h->length() == 3 &&
4595 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4596 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4597 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4598 "Invalid threadStatus value");
4599 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4600 3, /* number of substates */
4601 CHECK_NULL);
4602 names_h = objArrayHandle(THREAD, r);
4603 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4604 CHECK_NULL);
4605 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4606 CHECK_NULL);
4607 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4608 CHECK_NULL);
4609 names_h->obj_at_put(0, name0());
4610 names_h->obj_at_put(1, name1());
4611 names_h->obj_at_put(2, name2());
4612 break;
4613 }
4614 case JAVA_THREAD_STATE_TERMINATED : {
4615 assert(values_h->length() == 1 &&
4616 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4617 "Invalid threadStatus value");
4618 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4619 1, /* only 1 substate */
4620 CHECK_NULL);
4621 names_h = objArrayHandle(THREAD, r);
4622 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4623 names_h->obj_at_put(0, name());
4624 break;
4625 }
4626 default:
4627 // Unknown state - probably incompatible JDK version
4628 return NULL;
4629 }
4630 return (jobjectArray) JNIHandles::make_local(env, names_h());
4631 }
4632 JVM_END
4633
4634 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4635 {
4636 memset(info, 0, sizeof(info_size));
4637
4638 info->jvm_version = Abstract_VM_Version::jvm_version();
4639 info->update_version = 0; /* 0 in HotSpot Express VM */
4640 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4641
4642 // when we add a new capability in the jvm_version_info struct, we should also
4643 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4644 // counter defined in runtimeService.cpp.
4645 info->is_attachable = AttachListener::is_attach_supported();
4646 #ifdef KERNEL
4647 info->is_kernel_jvm = 1; // true;
4648 #else // KERNEL
4649 info->is_kernel_jvm = 0; // false;
4650 #endif // KERNEL
4651 }
4652 JVM_END
4653