1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #if INCLUDE_CDS
32 #include "classfile/sharedClassUtil.hpp"
33 #include "classfile/systemDictionaryShared.hpp"
34 #endif
35 #include "classfile/vmSymbols.hpp"
36 #include "gc_interface/collectedHeap.inline.hpp"
37 #include "interpreter/bytecode.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/fieldStreams.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/method.hpp"
44 #include "prims/jvm.h"
45 #include "prims/jvm_misc.hpp"
46 #include "prims/jvmtiExport.hpp"
47 #include "prims/jvmtiThreadState.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "prims/privilegedStack.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/atomic.inline.hpp"
52 #include "runtime/dtraceJSDT.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/jfieldIDWorkaround.hpp"
59 #include "runtime/orderAccess.inline.hpp"
60 #include "runtime/os.inline.hpp"
61 #include "runtime/perfData.hpp"
62 #include "runtime/reflection.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/vframe.hpp"
65 #include "runtime/vm_operations.hpp"
66 #include "runtime/vm_version.hpp"
67 #include "services/attachListener.hpp"
68 #include "services/management.hpp"
69 #include "services/threadService.hpp"
70 #include "trace/tracing.hpp"
71 #include "utilities/copy.hpp"
72 #include "utilities/defaultStream.hpp"
73 #include "utilities/dtrace.hpp"
74 #include "utilities/events.hpp"
75 #include "utilities/histogram.hpp"
76 #include "utilities/top.hpp"
77 #include "utilities/utf8.hpp"
78 #ifdef TARGET_OS_FAMILY_linux
79 # include "jvm_linux.h"
80 #endif
81 #ifdef TARGET_OS_FAMILY_solaris
82 # include "jvm_solaris.h"
83 #endif
84 #ifdef TARGET_OS_FAMILY_windows
85 # include "jvm_windows.h"
86 #endif
87 #ifdef TARGET_OS_FAMILY_aix
88 # include "jvm_aix.h"
89 #endif
90 #ifdef TARGET_OS_FAMILY_bsd
91 # include "jvm_bsd.h"
92 #endif
93
94 #include <errno.h>
95
96 /*
97 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
98 such ctors and calls MUST NOT come between an oop declaration/init and its
99 usage because if objects are move this may cause various memory stomps, bus
100 errors and segfaults. Here is a cookbook for causing so called "naked oop
101 failures":
102
103 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
104 JVMWrapper("JVM_GetClassDeclaredFields");
105
106 // Object address to be held directly in mirror & not visible to GC
107 oop mirror = JNIHandles::resolve_non_null(ofClass);
108
109 // If this ctor can hit a safepoint, moving objects around, then
110 ComplexConstructor foo;
111
112 // Boom! mirror may point to JUNK instead of the intended object
113 (some dereference of mirror)
114
115 // Here's another call that may block for GC, making mirror stale
116 MutexLocker ml(some_lock);
117
118 // And here's an initializer that can result in a stale oop
119 // all in one step.
120 oop o = call_that_can_throw_exception(TRAPS);
121
122
123 The solution is to keep the oop declaration BELOW the ctor or function
124 call that might cause a GC, do another resolve to reassign the oop, or
125 consider use of a Handle instead of an oop so there is immunity from object
126 motion. But note that the "QUICK" entries below do not have a handlemark
127 and thus can only support use of handles passed in.
128 */
129
130 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
131 ResourceMark rm;
132 int line_number = -1;
133 const char * source_file = NULL;
134 const char * trace = "explicit";
135 InstanceKlass* caller = NULL;
136 JavaThread* jthread = JavaThread::current();
137 if (jthread->has_last_Java_frame()) {
138 vframeStream vfst(jthread);
139
140 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
141 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
142 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
143 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
144 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
145
146 Method* last_caller = NULL;
147
148 while (!vfst.at_end()) {
149 Method* m = vfst.method();
150 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
151 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
152 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
153 break;
154 }
155 last_caller = m;
156 vfst.next();
157 }
158 // if this is called from Class.forName0 and that is called from Class.forName,
159 // then print the caller of Class.forName. If this is Class.loadClass, then print
160 // that caller, otherwise keep quiet since this should be picked up elsewhere.
161 bool found_it = false;
162 if (!vfst.at_end() &&
163 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
164 vfst.method()->name() == vmSymbols::forName0_name()) {
165 vfst.next();
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName_name()) {
169 vfst.next();
170 found_it = true;
171 }
172 } else if (last_caller != NULL &&
173 last_caller->method_holder()->name() ==
174 vmSymbols::java_lang_ClassLoader() &&
175 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
176 last_caller->name() == vmSymbols::loadClass_name())) {
177 found_it = true;
178 } else if (!vfst.at_end()) {
179 if (vfst.method()->is_native()) {
180 // JNI call
181 found_it = true;
182 }
183 }
184 if (found_it && !vfst.at_end()) {
185 // found the caller
186 caller = vfst.method()->method_holder();
187 line_number = vfst.method()->line_number_from_bci(vfst.bci());
188 if (line_number == -1) {
189 // show method name if it's a native method
190 trace = vfst.method()->name_and_sig_as_C_string();
191 }
192 Symbol* s = caller->source_file_name();
193 if (s != NULL) {
194 source_file = s->as_C_string();
195 }
196 }
197 }
198 if (caller != NULL) {
199 if (to_class != caller) {
200 const char * from = caller->external_name();
201 const char * to = to_class->external_name();
202 // print in a single call to reduce interleaving between threads
203 if (source_file != NULL) {
204 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
205 } else {
206 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
207 }
208 }
209 }
210 }
211
212 void trace_class_resolution(Klass* to_class) {
213 EXCEPTION_MARK;
214 trace_class_resolution_impl(to_class, THREAD);
215 if (HAS_PENDING_EXCEPTION) {
216 CLEAR_PENDING_EXCEPTION;
217 }
218 }
219
220 // Wrapper to trace JVM functions
221
222 #ifdef ASSERT
223 class JVMTraceWrapper : public StackObj {
224 public:
225 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
226 if (TraceJVMCalls) {
227 va_list ap;
228 va_start(ap, format);
229 tty->print("JVM ");
230 tty->vprint_cr(format, ap);
231 va_end(ap);
232 }
233 }
234 };
235
236 Histogram* JVMHistogram;
237 volatile jint JVMHistogram_lock = 0;
238
239 class JVMHistogramElement : public HistogramElement {
240 public:
241 JVMHistogramElement(const char* name);
242 };
243
244 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
245 _name = elementName;
246 uintx count = 0;
247
248 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
249 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
250 count +=1;
251 if ( (WarnOnStalledSpinLock > 0)
252 && (count % WarnOnStalledSpinLock == 0)) {
253 warning("JVMHistogram_lock seems to be stalled");
254 }
255 }
256 }
257
258 if(JVMHistogram == NULL)
259 JVMHistogram = new Histogram("JVM Call Counts",100);
260
261 JVMHistogram->add_element(this);
262 Atomic::dec(&JVMHistogram_lock);
263 }
264
265 #define JVMCountWrapper(arg) \
266 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
267 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
268
269 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
270 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
271 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
272 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
273 #else
274 #define JVMWrapper(arg1)
275 #define JVMWrapper2(arg1, arg2)
276 #define JVMWrapper3(arg1, arg2, arg3)
277 #define JVMWrapper4(arg1, arg2, arg3, arg4)
278 #endif
279
280
281 // Interface version /////////////////////////////////////////////////////////////////////
282
283
284 JVM_LEAF(jint, JVM_GetInterfaceVersion())
285 return JVM_INTERFACE_VERSION;
286 JVM_END
287
288
289 // java.lang.System //////////////////////////////////////////////////////////////////////
290
291
292 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
293 JVMWrapper("JVM_CurrentTimeMillis");
294 return os::javaTimeMillis();
295 JVM_END
296
297 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
298 JVMWrapper("JVM_NanoTime");
299 return os::javaTimeNanos();
300 JVM_END
301
302
303 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
304 jobject dst, jint dst_pos, jint length))
305 JVMWrapper("JVM_ArrayCopy");
306 // Check if we have null pointers
307 if (src == NULL || dst == NULL) {
308 THROW(vmSymbols::java_lang_NullPointerException());
309 }
310 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
311 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
312 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
313 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
314 // Do copy
315 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
316 JVM_END
317
318
319 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
320 JavaValue r(T_OBJECT);
321 // public synchronized Object put(Object key, Object value);
322 HandleMark hm(THREAD);
323 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
324 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
325 JavaCalls::call_virtual(&r,
326 props,
327 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
328 vmSymbols::put_name(),
329 vmSymbols::object_object_object_signature(),
330 key_str,
331 value_str,
332 THREAD);
333 }
334
335
336 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
337
338
339 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
340 JVMWrapper("JVM_InitProperties");
341 ResourceMark rm;
342
343 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
344
345 // System property list includes both user set via -D option and
346 // jvm system specific properties.
347 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
348 PUTPROP(props, p->key(), p->value());
349 }
350
351 // Convert the -XX:MaxDirectMemorySize= command line flag
352 // to the sun.nio.MaxDirectMemorySize property.
353 // Do this after setting user properties to prevent people
354 // from setting the value with a -D option, as requested.
355 {
356 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
357 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
358 } else {
359 char as_chars[256];
360 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
361 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
362 }
363 }
364
365 // JVM monitoring and management support
366 // Add the sun.management.compiler property for the compiler's name
367 {
368 #undef CSIZE
369 #if defined(_LP64) || defined(_WIN64)
370 #define CSIZE "64-Bit "
371 #else
372 #define CSIZE
373 #endif // 64bit
374
375 #ifdef TIERED
376 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
377 #else
378 #if defined(COMPILER1)
379 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
380 #elif defined(COMPILER2)
381 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
382 #else
383 const char* compiler_name = "";
384 #endif // compilers
385 #endif // TIERED
386
387 if (*compiler_name != '\0' &&
388 (Arguments::mode() != Arguments::_int)) {
389 PUTPROP(props, "sun.management.compiler", compiler_name);
390 }
391 }
392
393 return properties;
394 JVM_END
395
396
397 /*
398 * Return the temporary directory that the VM uses for the attach
399 * and perf data files.
400 *
401 * It is important that this directory is well-known and the
402 * same for all VM instances. It cannot be affected by configuration
403 * variables such as java.io.tmpdir.
404 */
405 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
406 JVMWrapper("JVM_GetTemporaryDirectory");
407 HandleMark hm(THREAD);
408 const char* temp_dir = os::get_temp_directory();
409 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
410 return (jstring) JNIHandles::make_local(env, h());
411 JVM_END
412
413
414 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
415
416 extern volatile jint vm_created;
417
418 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
419 if (vm_created != 0 && (code == 0)) {
420 // The VM is about to exit. We call back into Java to check whether finalizers should be run
421 Universe::run_finalizers_on_exit();
422 }
423 before_exit(thread);
424 vm_exit(code);
425 JVM_END
426
427
428 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
429 before_exit(thread);
430 vm_exit(code);
431 JVM_END
432
433
434 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
435 register_on_exit_function(func);
436 JVM_END
437
438
439 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
440 JVMWrapper("JVM_GC");
441 if (!DisableExplicitGC) {
442 Universe::heap()->collect(GCCause::_java_lang_system_gc);
443 }
444 JVM_END
445
446
447 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
448 JVMWrapper("JVM_MaxObjectInspectionAge");
449 return Universe::heap()->millis_since_last_gc();
450 JVM_END
451
452
453 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
454 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
455 JVM_END
456
457
458 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
459 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
460 JVM_END
461
462 static inline jlong convert_size_t_to_jlong(size_t val) {
463 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
464 NOT_LP64 (return (jlong)val;)
465 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
466 }
467
468 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
469 JVMWrapper("JVM_TotalMemory");
470 size_t n = Universe::heap()->capacity();
471 return convert_size_t_to_jlong(n);
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
476 JVMWrapper("JVM_FreeMemory");
477 CollectedHeap* ch = Universe::heap();
478 size_t n;
479 {
480 MutexLocker x(Heap_lock);
481 n = ch->capacity() - ch->used();
482 }
483 return convert_size_t_to_jlong(n);
484 JVM_END
485
486
487 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
488 JVMWrapper("JVM_MaxMemory");
489 size_t n = Universe::heap()->max_capacity();
490 return convert_size_t_to_jlong(n);
491 JVM_END
492
493
494 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
495 JVMWrapper("JVM_ActiveProcessorCount");
496 return os::active_processor_count();
497 JVM_END
498
499
500
501 // java.lang.Throwable //////////////////////////////////////////////////////
502
503
504 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
505 JVMWrapper("JVM_FillInStackTrace");
506 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
507 java_lang_Throwable::fill_in_stack_trace(exception);
508 JVM_END
509
510
511 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
512 JVMWrapper("JVM_GetStackTraceDepth");
513 oop exception = JNIHandles::resolve(throwable);
514 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
515 JVM_END
516
517
518 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
519 JVMWrapper("JVM_GetStackTraceElement");
520 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
521 oop exception = JNIHandles::resolve(throwable);
522 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
523 return JNIHandles::make_local(env, element);
524 JVM_END
525
526
527 // java.lang.Object ///////////////////////////////////////////////
528
529
530 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
531 JVMWrapper("JVM_IHashCode");
532 // as implemented in the classic virtual machine; return 0 if object is NULL
533 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
534 JVM_END
535
536
537 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
538 JVMWrapper("JVM_MonitorWait");
539 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
540 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
541 if (JvmtiExport::should_post_monitor_wait()) {
542 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
543
544 // The current thread already owns the monitor and it has not yet
545 // been added to the wait queue so the current thread cannot be
546 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
547 // event handler cannot accidentally consume an unpark() meant for
548 // the ParkEvent associated with this ObjectMonitor.
549 }
550 ObjectSynchronizer::wait(obj, ms, CHECK);
551 JVM_END
552
553
554 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
555 JVMWrapper("JVM_MonitorNotify");
556 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
557 ObjectSynchronizer::notify(obj, CHECK);
558 JVM_END
559
560
561 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
562 JVMWrapper("JVM_MonitorNotifyAll");
563 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
564 ObjectSynchronizer::notifyall(obj, CHECK);
565 JVM_END
566
567
568 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
569 JVMWrapper("JVM_Clone");
570 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
571 const KlassHandle klass (THREAD, obj->klass());
572 JvmtiVMObjectAllocEventCollector oam;
573
574 #ifdef ASSERT
575 // Just checking that the cloneable flag is set correct
576 if (obj->is_array()) {
577 guarantee(klass->is_cloneable(), "all arrays are cloneable");
578 } else {
579 guarantee(obj->is_instance(), "should be instanceOop");
580 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
581 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
582 }
583 #endif
584
585 // Check if class of obj supports the Cloneable interface.
586 // All arrays are considered to be cloneable (See JLS 20.1.5)
587 if (!klass->is_cloneable()) {
588 ResourceMark rm(THREAD);
589 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
590 }
591
592 // Make shallow object copy
593 const int size = obj->size();
594 oop new_obj = NULL;
595 if (obj->is_array()) {
596 const int length = ((arrayOop)obj())->length();
597 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
598 } else {
599 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
600 }
601 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
602 // is modifying a reference field in the clonee, a non-oop-atomic copy might
603 // be suspended in the middle of copying the pointer and end up with parts
604 // of two different pointers in the field. Subsequent dereferences will crash.
605 // 4846409: an oop-copy of objects with long or double fields or arrays of same
606 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
607 // of oops. We know objects are aligned on a minimum of an jlong boundary.
608 // The same is true of StubRoutines::object_copy and the various oop_copy
609 // variants, and of the code generated by the inline_native_clone intrinsic.
610 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
611 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
612 (size_t)align_object_size(size) / HeapWordsPerLong);
613 // Clear the header
614 new_obj->init_mark();
615
616 // Store check (mark entire object and let gc sort it out)
617 BarrierSet* bs = Universe::heap()->barrier_set();
618 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
619 bs->write_region(MemRegion((HeapWord*)new_obj, size));
620
621 // Caution: this involves a java upcall, so the clone should be
622 // "gc-robust" by this stage.
623 if (klass->has_finalizer()) {
624 assert(obj->is_instance(), "should be instanceOop");
625 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
626 }
627
628 return JNIHandles::make_local(env, oop(new_obj));
629 JVM_END
630
631 // java.lang.Compiler ////////////////////////////////////////////////////
632
633 // The initial cuts of the HotSpot VM will not support JITs, and all existing
634 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
635 // functions are all silently ignored unless JVM warnings are printed.
636
637 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
639 JVM_END
640
641
642 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
644 return JNI_FALSE;
645 JVM_END
646
647
648 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
649 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
650 return JNI_FALSE;
651 JVM_END
652
653
654 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
655 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
656 return JNI_FALSE;
657 JVM_END
658
659
660 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
661 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
662 return NULL;
663 JVM_END
664
665
666 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
667 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
668 JVM_END
669
670
671 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
672 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
673 JVM_END
674
675
676
677 // Error message support //////////////////////////////////////////////////////
678
679 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
680 JVMWrapper("JVM_GetLastErrorString");
681 return (jint)os::lasterror(buf, len);
682 JVM_END
683
684
685 // java.io.File ///////////////////////////////////////////////////////////////
686
687 JVM_LEAF(char*, JVM_NativePath(char* path))
688 JVMWrapper2("JVM_NativePath (%s)", path);
689 return os::native_path(path);
690 JVM_END
691
692
693 // Misc. class handling ///////////////////////////////////////////////////////////
694
695
696 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
697 JVMWrapper("JVM_GetCallerClass");
698
699 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
700 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
701 // temporarily for existing code to use until a replacement API is defined.
702 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
703 Klass* k = thread->security_get_caller_class(depth);
704 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
705 }
706
707 // Getting the class of the caller frame.
708 //
709 // The call stack at this point looks something like this:
710 //
711 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
712 // [1] [ @CallerSensitive API.method ]
713 // [.] [ (skipped intermediate frames) ]
714 // [n] [ caller ]
715 vframeStream vfst(thread);
716 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
717 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
718 Method* m = vfst.method();
719 assert(m != NULL, "sanity");
720 switch (n) {
721 case 0:
722 // This must only be called from Reflection.getCallerClass
723 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
724 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
725 }
726 // fall-through
727 case 1:
728 // Frame 0 and 1 must be caller sensitive.
729 if (!m->caller_sensitive()) {
730 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
731 }
732 break;
733 default:
734 if (!m->is_ignored_by_security_stack_walk()) {
735 // We have reached the desired frame; return the holder class.
736 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
737 }
738 break;
739 }
740 }
741 return NULL;
742 JVM_END
743
744
745 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
746 JVMWrapper("JVM_FindPrimitiveClass");
747 oop mirror = NULL;
748 BasicType t = name2type(utf);
749 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
750 mirror = Universe::java_mirror(t);
751 }
752 if (mirror == NULL) {
753 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
754 } else {
755 return (jclass) JNIHandles::make_local(env, mirror);
756 }
757 JVM_END
758
759
760 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
761 JVMWrapper("JVM_ResolveClass");
762 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
763 JVM_END
764
765
766 // Returns a class loaded by the bootstrap class loader; or null
767 // if not found. ClassNotFoundException is not thrown.
768 //
769 // Rationale behind JVM_FindClassFromBootLoader
770 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
771 // b> because of (a) java.dll has a direct dependecy on the unexported
772 // private symbol "_JVM_FindClassFromClassLoader@20".
773 // c> the launcher cannot use the private symbol as it dynamically opens
774 // the entry point, so if something changes, the launcher will fail
775 // unexpectedly at runtime, it is safest for the launcher to dlopen a
776 // stable exported interface.
777 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
778 // signature to change from _JVM_FindClassFromClassLoader@20 to
779 // JVM_FindClassFromClassLoader and will not be backward compatible
780 // with older JDKs.
781 // Thus a public/stable exported entry point is the right solution,
782 // public here means public in linker semantics, and is exported only
783 // to the JDK, and is not intended to be a public API.
784
785 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
786 const char* name))
787 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
788
789 // Java libraries should ensure that name is never null...
790 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
791 // It's impossible to create this class; the name cannot fit
792 // into the constant pool.
793 return NULL;
794 }
795
796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
797 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
798 if (k == NULL) {
799 return NULL;
800 }
801
802 if (TraceClassResolution) {
803 trace_class_resolution(k);
804 }
805 return (jclass) JNIHandles::make_local(env, k->java_mirror());
806 JVM_END
807
808 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
809 jboolean init, jobject loader,
810 jboolean throwError))
811 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
812 throwError ? "error" : "exception");
813 // Java libraries should ensure that name is never null...
814 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
815 // It's impossible to create this class; the name cannot fit
816 // into the constant pool.
817 if (throwError) {
818 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
819 } else {
820 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
821 }
822 }
823 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
824 Handle h_loader(THREAD, JNIHandles::resolve(loader));
825 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
826 Handle(), throwError, THREAD);
827
828 if (TraceClassResolution && result != NULL) {
829 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
830 }
831 return result;
832 JVM_END
833
834
835 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
836 jboolean init, jclass from))
837 JVMWrapper2("JVM_FindClassFromClass %s", name);
838 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
839 // It's impossible to create this class; the name cannot fit
840 // into the constant pool.
841 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
842 }
843 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
844 oop from_class_oop = JNIHandles::resolve(from);
845 Klass* from_class = (from_class_oop == NULL)
846 ? (Klass*)NULL
847 : java_lang_Class::as_Klass(from_class_oop);
848 oop class_loader = NULL;
849 oop protection_domain = NULL;
850 if (from_class != NULL) {
851 class_loader = from_class->class_loader();
852 protection_domain = from_class->protection_domain();
853 }
854 Handle h_loader(THREAD, class_loader);
855 Handle h_prot (THREAD, protection_domain);
856 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
857 h_prot, true, thread);
858
859 if (TraceClassResolution && result != NULL) {
860 // this function is generally only used for class loading during verification.
861 ResourceMark rm;
862 oop from_mirror = JNIHandles::resolve_non_null(from);
863 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
864 const char * from_name = from_class->external_name();
865
866 oop mirror = JNIHandles::resolve_non_null(result);
867 Klass* to_class = java_lang_Class::as_Klass(mirror);
868 const char * to = to_class->external_name();
869 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
870 }
871
872 return result;
873 JVM_END
874
875 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
876 if (loader.is_null()) {
877 return;
878 }
879
880 // check whether the current caller thread holds the lock or not.
881 // If not, increment the corresponding counter
882 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
883 ObjectSynchronizer::owner_self) {
884 counter->inc();
885 }
886 }
887
888 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
889 // and JVM_DefineClassWithSourceCond()
890 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
891 jobject loader, const jbyte *buf,
892 jsize len, jobject pd, const char *source,
893 jboolean verify, TRAPS) {
894 if (source == NULL) source = "__JVM_DefineClass__";
895
896 assert(THREAD->is_Java_thread(), "must be a JavaThread");
897 JavaThread* jt = (JavaThread*) THREAD;
898
899 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
900 ClassLoader::perf_define_appclass_selftime(),
901 ClassLoader::perf_define_appclasses(),
902 jt->get_thread_stat()->perf_recursion_counts_addr(),
903 jt->get_thread_stat()->perf_timers_addr(),
904 PerfClassTraceTime::DEFINE_CLASS);
905
906 if (UsePerfData) {
907 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
908 }
909
910 // Since exceptions can be thrown, class initialization can take place
911 // if name is NULL no check for class name in .class stream has to be made.
912 TempNewSymbol class_name = NULL;
913 if (name != NULL) {
914 const int str_len = (int)strlen(name);
915 if (str_len > Symbol::max_length()) {
916 // It's impossible to create this class; the name cannot fit
917 // into the constant pool.
918 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
919 }
920 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
921 }
922
923 ResourceMark rm(THREAD);
924 ClassFileStream st((u1*) buf, len, (char *)source);
925 Handle class_loader (THREAD, JNIHandles::resolve(loader));
926 if (UsePerfData) {
927 is_lock_held_by_thread(class_loader,
928 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
929 THREAD);
930 }
931 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
932 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
933 protection_domain, &st,
934 verify != 0,
935 CHECK_NULL);
936
937 if (TraceClassResolution && k != NULL) {
938 trace_class_resolution(k);
939 }
940
941 return (jclass) JNIHandles::make_local(env, k->java_mirror());
942 }
943
944
945 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
946 JVMWrapper2("JVM_DefineClass %s", name);
947
948 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
949 JVM_END
950
951
952 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
953 JVMWrapper2("JVM_DefineClassWithSource %s", name);
954
955 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
956 JVM_END
957
958 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
959 jobject loader, const jbyte *buf,
960 jsize len, jobject pd,
961 const char *source, jboolean verify))
962 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
963
964 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
965 JVM_END
966
967 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
968 JVMWrapper("JVM_FindLoadedClass");
969 ResourceMark rm(THREAD);
970
971 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
972 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
973
974 const char* str = java_lang_String::as_utf8_string(string());
975 // Sanity check, don't expect null
976 if (str == NULL) return NULL;
977
978 const int str_len = (int)strlen(str);
979 if (str_len > Symbol::max_length()) {
980 // It's impossible to create this class; the name cannot fit
981 // into the constant pool.
982 return NULL;
983 }
984 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
985
986 // Security Note:
987 // The Java level wrapper will perform the necessary security check allowing
988 // us to pass the NULL as the initiating class loader.
989 Handle h_loader(THREAD, JNIHandles::resolve(loader));
990 if (UsePerfData) {
991 is_lock_held_by_thread(h_loader,
992 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
993 THREAD);
994 }
995
996 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
997 h_loader,
998 Handle(),
999 CHECK_NULL);
1000 #if INCLUDE_CDS
1001 if (k == NULL) {
1002 // If the class is not already loaded, try to see if it's in the shared
1003 // archive for the current classloader (h_loader).
1004 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1005 klass_name, h_loader, CHECK_NULL);
1006 k = ik();
1007 }
1008 #endif
1009 return (k == NULL) ? NULL :
1010 (jclass) JNIHandles::make_local(env, k->java_mirror());
1011 JVM_END
1012
1013
1014 // Reflection support //////////////////////////////////////////////////////////////////////////////
1015
1016 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1017 assert (cls != NULL, "illegal class");
1018 JVMWrapper("JVM_GetClassName");
1019 JvmtiVMObjectAllocEventCollector oam;
1020 ResourceMark rm(THREAD);
1021 const char* name;
1022 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1023 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1024 } else {
1025 // Consider caching interned string in Klass
1026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1027 assert(k->is_klass(), "just checking");
1028 name = k->external_name();
1029 }
1030 oop result = StringTable::intern((char*) name, CHECK_NULL);
1031 return (jstring) JNIHandles::make_local(env, result);
1032 JVM_END
1033
1034
1035 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1036 JVMWrapper("JVM_GetClassInterfaces");
1037 JvmtiVMObjectAllocEventCollector oam;
1038 oop mirror = JNIHandles::resolve_non_null(cls);
1039
1040 // Special handling for primitive objects
1041 if (java_lang_Class::is_primitive(mirror)) {
1042 // Primitive objects does not have any interfaces
1043 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1044 return (jobjectArray) JNIHandles::make_local(env, r);
1045 }
1046
1047 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1048 // Figure size of result array
1049 int size;
1050 if (klass->oop_is_instance()) {
1051 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1052 } else {
1053 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1054 size = 2;
1055 }
1056
1057 // Allocate result array
1058 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1059 objArrayHandle result (THREAD, r);
1060 // Fill in result
1061 if (klass->oop_is_instance()) {
1062 // Regular instance klass, fill in all local interfaces
1063 for (int index = 0; index < size; index++) {
1064 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1065 result->obj_at_put(index, k->java_mirror());
1066 }
1067 } else {
1068 // All arrays implement java.lang.Cloneable and java.io.Serializable
1069 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1070 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1071 }
1072 return (jobjectArray) JNIHandles::make_local(env, result());
1073 JVM_END
1074
1075
1076 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1077 JVMWrapper("JVM_GetClassLoader");
1078 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1079 return NULL;
1080 }
1081 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1082 oop loader = k->class_loader();
1083 return JNIHandles::make_local(env, loader);
1084 JVM_END
1085
1086
1087 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1088 JVMWrapper("JVM_IsInterface");
1089 oop mirror = JNIHandles::resolve_non_null(cls);
1090 if (java_lang_Class::is_primitive(mirror)) {
1091 return JNI_FALSE;
1092 }
1093 Klass* k = java_lang_Class::as_Klass(mirror);
1094 jboolean result = k->is_interface();
1095 assert(!result || k->oop_is_instance(),
1096 "all interfaces are instance types");
1097 // The compiler intrinsic for isInterface tests the
1098 // Klass::_access_flags bits in the same way.
1099 return result;
1100 JVM_END
1101
1102
1103 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1104 JVMWrapper("JVM_GetClassSigners");
1105 JvmtiVMObjectAllocEventCollector oam;
1106 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1107 // There are no signers for primitive types
1108 return NULL;
1109 }
1110
1111 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1112
1113 // If there are no signers set in the class, or if the class
1114 // is an array, return NULL.
1115 if (signers == NULL) return NULL;
1116
1117 // copy of the signers array
1118 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1119 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1120 for (int index = 0; index < signers->length(); index++) {
1121 signers_copy->obj_at_put(index, signers->obj_at(index));
1122 }
1123
1124 // return the copy
1125 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1126 JVM_END
1127
1128
1129 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1130 JVMWrapper("JVM_SetClassSigners");
1131 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1132 // This call is ignored for primitive types and arrays.
1133 // Signers are only set once, ClassLoader.java, and thus shouldn't
1134 // be called with an array. Only the bootstrap loader creates arrays.
1135 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1136 if (k->oop_is_instance()) {
1137 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1138 }
1139 }
1140 JVM_END
1141
1142
1143 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1144 JVMWrapper("JVM_GetProtectionDomain");
1145 if (JNIHandles::resolve(cls) == NULL) {
1146 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1147 }
1148
1149 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1150 // Primitive types does not have a protection domain.
1151 return NULL;
1152 }
1153
1154 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1155 return (jobject) JNIHandles::make_local(env, pd);
1156 JVM_END
1157
1158
1159 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1160 // If there is a security manager and protection domain, check the access
1161 // in the protection domain, otherwise it is authorized.
1162 if (java_lang_System::has_security_manager()) {
1163
1164 // For bootstrapping, if pd implies method isn't in the JDK, allow
1165 // this context to revert to older behavior.
1166 // In this case the isAuthorized field in AccessControlContext is also not
1167 // present.
1168 if (Universe::protection_domain_implies_method() == NULL) {
1169 return true;
1170 }
1171
1172 // Whitelist certain access control contexts
1173 if (java_security_AccessControlContext::is_authorized(context)) {
1174 return true;
1175 }
1176
1177 oop prot = klass->protection_domain();
1178 if (prot != NULL) {
1179 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1180 // in the new wrapper.
1181 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1182 Handle h_prot(THREAD, prot);
1183 JavaValue result(T_BOOLEAN);
1184 JavaCallArguments args(h_prot);
1185 JavaCalls::call(&result, m, &args, CHECK_false);
1186 return (result.get_jboolean() != 0);
1187 }
1188 }
1189 return true;
1190 }
1191
1192 // Create an AccessControlContext with a protection domain with null codesource
1193 // and null permissions - which gives no permissions.
1194 oop create_dummy_access_control_context(TRAPS) {
1195 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1196 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1197 // Call constructor ProtectionDomain(null, null);
1198 JavaValue result(T_VOID);
1199 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1200 vmSymbols::object_initializer_name(),
1201 vmSymbols::codesource_permissioncollection_signature(),
1202 Handle(), Handle(), CHECK_NULL);
1203
1204 // new ProtectionDomain[] {pd};
1205 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1206 context->obj_at_put(0, obj());
1207
1208 // new AccessControlContext(new ProtectionDomain[] {pd})
1209 objArrayHandle h_context(THREAD, context);
1210 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1211 return acc;
1212 }
1213
1214 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1215 JVMWrapper("JVM_DoPrivileged");
1216
1217 if (action == NULL) {
1218 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1219 }
1220
1221 // Compute the frame initiating the do privileged operation and setup the privileged stack
1222 vframeStream vfst(thread);
1223 vfst.security_get_caller_frame(1);
1224
1225 if (vfst.at_end()) {
1226 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1227 }
1228
1229 Method* method = vfst.method();
1230 instanceKlassHandle klass (THREAD, method->method_holder());
1231
1232 // Check that action object understands "Object run()"
1233 Handle h_context;
1234 if (context != NULL) {
1235 h_context = Handle(THREAD, JNIHandles::resolve(context));
1236 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1237 if (!authorized) {
1238 // Create an unprivileged access control object and call it's run function
1239 // instead.
1240 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1241 h_context = Handle(THREAD, noprivs);
1242 }
1243 }
1244
1245 // Check that action object understands "Object run()"
1246 Handle object (THREAD, JNIHandles::resolve(action));
1247
1248 // get run() method
1249 Method* m_oop = object->klass()->uncached_lookup_method(
1250 vmSymbols::run_method_name(),
1251 vmSymbols::void_object_signature(),
1252 Klass::normal);
1253 methodHandle m (THREAD, m_oop);
1254 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1255 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1256 }
1257
1258 // Stack allocated list of privileged stack elements
1259 PrivilegedElement pi;
1260 if (!vfst.at_end()) {
1261 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1262 thread->set_privileged_stack_top(&pi);
1263 }
1264
1265
1266 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1267 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1268 Handle pending_exception;
1269 JavaValue result(T_OBJECT);
1270 JavaCallArguments args(object);
1271 JavaCalls::call(&result, m, &args, THREAD);
1272
1273 // done with action, remove ourselves from the list
1274 if (!vfst.at_end()) {
1275 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1276 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1277 }
1278
1279 if (HAS_PENDING_EXCEPTION) {
1280 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1281 CLEAR_PENDING_EXCEPTION;
1282 // JVMTI has already reported the pending exception
1283 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1284 if (THREAD->is_Java_thread()) {
1285 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1286 }
1287 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1288 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1289 // Throw a java.security.PrivilegedActionException(Exception e) exception
1290 JavaCallArguments args(pending_exception);
1291 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1292 vmSymbols::exception_void_signature(),
1293 &args);
1294 }
1295 }
1296
1297 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1298 return JNIHandles::make_local(env, (oop) result.get_jobject());
1299 JVM_END
1300
1301
1302 // Returns the inherited_access_control_context field of the running thread.
1303 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1304 JVMWrapper("JVM_GetInheritedAccessControlContext");
1305 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1306 return JNIHandles::make_local(env, result);
1307 JVM_END
1308
1309 class RegisterArrayForGC {
1310 private:
1311 JavaThread *_thread;
1312 public:
1313 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1314 _thread = thread;
1315 _thread->register_array_for_gc(array);
1316 }
1317
1318 ~RegisterArrayForGC() {
1319 _thread->register_array_for_gc(NULL);
1320 }
1321 };
1322
1323
1324 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1325 JVMWrapper("JVM_GetStackAccessControlContext");
1326 if (!UsePrivilegedStack) return NULL;
1327
1328 ResourceMark rm(THREAD);
1329 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1330 JvmtiVMObjectAllocEventCollector oam;
1331
1332 // count the protection domains on the execution stack. We collapse
1333 // duplicate consecutive protection domains into a single one, as
1334 // well as stopping when we hit a privileged frame.
1335
1336 // Use vframeStream to iterate through Java frames
1337 vframeStream vfst(thread);
1338
1339 oop previous_protection_domain = NULL;
1340 Handle privileged_context(thread, NULL);
1341 bool is_privileged = false;
1342 oop protection_domain = NULL;
1343
1344 for(; !vfst.at_end(); vfst.next()) {
1345 // get method of frame
1346 Method* method = vfst.method();
1347 intptr_t* frame_id = vfst.frame_id();
1348
1349 // check the privileged frames to see if we have a match
1350 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1351 // this frame is privileged
1352 is_privileged = true;
1353 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1354 protection_domain = thread->privileged_stack_top()->protection_domain();
1355 } else {
1356 protection_domain = method->method_holder()->protection_domain();
1357 }
1358
1359 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1360 local_array->push(protection_domain);
1361 previous_protection_domain = protection_domain;
1362 }
1363
1364 if (is_privileged) break;
1365 }
1366
1367
1368 // either all the domains on the stack were system domains, or
1369 // we had a privileged system domain
1370 if (local_array->is_empty()) {
1371 if (is_privileged && privileged_context.is_null()) return NULL;
1372
1373 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1374 return JNIHandles::make_local(env, result);
1375 }
1376
1377 // the resource area must be registered in case of a gc
1378 RegisterArrayForGC ragc(thread, local_array);
1379 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1380 local_array->length(), CHECK_NULL);
1381 objArrayHandle h_context(thread, context);
1382 for (int index = 0; index < local_array->length(); index++) {
1383 h_context->obj_at_put(index, local_array->at(index));
1384 }
1385
1386 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1387
1388 return JNIHandles::make_local(env, result);
1389 JVM_END
1390
1391
1392 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1393 JVMWrapper("JVM_IsArrayClass");
1394 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1395 return (k != NULL) && k->oop_is_array() ? true : false;
1396 JVM_END
1397
1398
1399 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1400 JVMWrapper("JVM_IsPrimitiveClass");
1401 oop mirror = JNIHandles::resolve_non_null(cls);
1402 return (jboolean) java_lang_Class::is_primitive(mirror);
1403 JVM_END
1404
1405
1406 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1407 JVMWrapper("JVM_GetClassModifiers");
1408 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1409 // Primitive type
1410 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1411 }
1412
1413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1414 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1415 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1416 return k->modifier_flags();
1417 JVM_END
1418
1419
1420 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1421
1422 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1423 JvmtiVMObjectAllocEventCollector oam;
1424 // ofClass is a reference to a java_lang_Class object. The mirror object
1425 // of an InstanceKlass
1426
1427 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1428 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1429 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1430 return (jobjectArray)JNIHandles::make_local(env, result);
1431 }
1432
1433 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1434 InnerClassesIterator iter(k);
1435
1436 if (iter.length() == 0) {
1437 // Neither an inner nor outer class
1438 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1439 return (jobjectArray)JNIHandles::make_local(env, result);
1440 }
1441
1442 // find inner class info
1443 constantPoolHandle cp(thread, k->constants());
1444 int length = iter.length();
1445
1446 // Allocate temp. result array
1447 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1448 objArrayHandle result (THREAD, r);
1449 int members = 0;
1450
1451 for (; !iter.done(); iter.next()) {
1452 int ioff = iter.inner_class_info_index();
1453 int ooff = iter.outer_class_info_index();
1454
1455 if (ioff != 0 && ooff != 0) {
1456 // Check to see if the name matches the class we're looking for
1457 // before attempting to find the class.
1458 if (cp->klass_name_at_matches(k, ooff)) {
1459 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1460 if (outer_klass == k()) {
1461 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1462 instanceKlassHandle inner_klass (THREAD, ik);
1463
1464 // Throws an exception if outer klass has not declared k as
1465 // an inner klass
1466 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1467
1468 result->obj_at_put(members, inner_klass->java_mirror());
1469 members++;
1470 }
1471 }
1472 }
1473 }
1474
1475 if (members != length) {
1476 // Return array of right length
1477 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1478 for(int i = 0; i < members; i++) {
1479 res->obj_at_put(i, result->obj_at(i));
1480 }
1481 return (jobjectArray)JNIHandles::make_local(env, res);
1482 }
1483
1484 return (jobjectArray)JNIHandles::make_local(env, result());
1485 JVM_END
1486
1487
1488 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1489 {
1490 // ofClass is a reference to a java_lang_Class object.
1491 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1492 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1493 return NULL;
1494 }
1495
1496 bool inner_is_member = false;
1497 Klass* outer_klass
1498 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1499 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1500 if (outer_klass == NULL) return NULL; // already a top-level class
1501 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1502 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1503 }
1504 JVM_END
1505
1506 // should be in InstanceKlass.cpp, but is here for historical reasons
1507 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1508 bool* inner_is_member,
1509 TRAPS) {
1510 Thread* thread = THREAD;
1511 InnerClassesIterator iter(k);
1512 if (iter.length() == 0) {
1513 // No inner class info => no declaring class
1514 return NULL;
1515 }
1516
1517 constantPoolHandle i_cp(thread, k->constants());
1518
1519 bool found = false;
1520 Klass* ok;
1521 instanceKlassHandle outer_klass;
1522 *inner_is_member = false;
1523
1524 // Find inner_klass attribute
1525 for (; !iter.done() && !found; iter.next()) {
1526 int ioff = iter.inner_class_info_index();
1527 int ooff = iter.outer_class_info_index();
1528 int noff = iter.inner_name_index();
1529 if (ioff != 0) {
1530 // Check to see if the name matches the class we're looking for
1531 // before attempting to find the class.
1532 if (i_cp->klass_name_at_matches(k, ioff)) {
1533 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1534 found = (k() == inner_klass);
1535 if (found && ooff != 0) {
1536 ok = i_cp->klass_at(ooff, CHECK_NULL);
1537 outer_klass = instanceKlassHandle(thread, ok);
1538 *inner_is_member = true;
1539 }
1540 }
1541 }
1542 }
1543
1544 if (found && outer_klass.is_null()) {
1545 // It may be anonymous; try for that.
1546 int encl_method_class_idx = k->enclosing_method_class_index();
1547 if (encl_method_class_idx != 0) {
1548 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1549 outer_klass = instanceKlassHandle(thread, ok);
1550 *inner_is_member = false;
1551 }
1552 }
1553
1554 // If no inner class attribute found for this class.
1555 if (outer_klass.is_null()) return NULL;
1556
1557 // Throws an exception if outer klass has not declared k as an inner klass
1558 // We need evidence that each klass knows about the other, or else
1559 // the system could allow a spoof of an inner class to gain access rights.
1560 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1561 return outer_klass();
1562 }
1563
1564 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1565 assert (cls != NULL, "illegal class");
1566 JVMWrapper("JVM_GetClassSignature");
1567 JvmtiVMObjectAllocEventCollector oam;
1568 ResourceMark rm(THREAD);
1569 // Return null for arrays and primatives
1570 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1571 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1572 if (k->oop_is_instance()) {
1573 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1574 if (sym == NULL) return NULL;
1575 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1576 return (jstring) JNIHandles::make_local(env, str());
1577 }
1578 }
1579 return NULL;
1580 JVM_END
1581
1582
1583 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1584 assert (cls != NULL, "illegal class");
1585 JVMWrapper("JVM_GetClassAnnotations");
1586
1587 // Return null for arrays and primitives
1588 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1590 if (k->oop_is_instance()) {
1591 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1592 return (jbyteArray) JNIHandles::make_local(env, a);
1593 }
1594 }
1595 return NULL;
1596 JVM_END
1597
1598
1599 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1600 // some of this code was adapted from from jni_FromReflectedField
1601
1602 oop reflected = JNIHandles::resolve_non_null(field);
1603 oop mirror = java_lang_reflect_Field::clazz(reflected);
1604 Klass* k = java_lang_Class::as_Klass(mirror);
1605 int slot = java_lang_reflect_Field::slot(reflected);
1606 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1607
1608 KlassHandle kh(THREAD, k);
1609 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1610
1611 if (modifiers & JVM_ACC_STATIC) {
1612 // for static fields we only look in the current class
1613 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1614 assert(false, "cannot find static field");
1615 return false;
1616 }
1617 } else {
1618 // for instance fields we start with the current class and work
1619 // our way up through the superclass chain
1620 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1621 assert(false, "cannot find instance field");
1622 return false;
1623 }
1624 }
1625 return true;
1626 }
1627
1628 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1629 // field is a handle to a java.lang.reflect.Field object
1630 assert(field != NULL, "illegal field");
1631 JVMWrapper("JVM_GetFieldAnnotations");
1632
1633 fieldDescriptor fd;
1634 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1635 if (!gotFd) {
1636 return NULL;
1637 }
1638
1639 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1640 JVM_END
1641
1642
1643 static Method* jvm_get_method_common(jobject method) {
1644 // some of this code was adapted from from jni_FromReflectedMethod
1645
1646 oop reflected = JNIHandles::resolve_non_null(method);
1647 oop mirror = NULL;
1648 int slot = 0;
1649
1650 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1651 mirror = java_lang_reflect_Constructor::clazz(reflected);
1652 slot = java_lang_reflect_Constructor::slot(reflected);
1653 } else {
1654 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1655 "wrong type");
1656 mirror = java_lang_reflect_Method::clazz(reflected);
1657 slot = java_lang_reflect_Method::slot(reflected);
1658 }
1659 Klass* k = java_lang_Class::as_Klass(mirror);
1660
1661 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1662 assert(m != NULL, "cannot find method");
1663 return m; // caller has to deal with NULL in product mode
1664 }
1665
1666
1667 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1668 JVMWrapper("JVM_GetMethodAnnotations");
1669
1670 // method is a handle to a java.lang.reflect.Method object
1671 Method* m = jvm_get_method_common(method);
1672 if (m == NULL) {
1673 return NULL;
1674 }
1675
1676 return (jbyteArray) JNIHandles::make_local(env,
1677 Annotations::make_java_array(m->annotations(), THREAD));
1678 JVM_END
1679
1680
1681 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1682 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1683
1684 // method is a handle to a java.lang.reflect.Method object
1685 Method* m = jvm_get_method_common(method);
1686 if (m == NULL) {
1687 return NULL;
1688 }
1689
1690 return (jbyteArray) JNIHandles::make_local(env,
1691 Annotations::make_java_array(m->annotation_default(), THREAD));
1692 JVM_END
1693
1694
1695 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1696 JVMWrapper("JVM_GetMethodParameterAnnotations");
1697
1698 // method is a handle to a java.lang.reflect.Method object
1699 Method* m = jvm_get_method_common(method);
1700 if (m == NULL) {
1701 return NULL;
1702 }
1703
1704 return (jbyteArray) JNIHandles::make_local(env,
1705 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1706 JVM_END
1707
1708 /* Type use annotations support (JDK 1.8) */
1709
1710 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1711 assert (cls != NULL, "illegal class");
1712 JVMWrapper("JVM_GetClassTypeAnnotations");
1713 ResourceMark rm(THREAD);
1714 // Return null for arrays and primitives
1715 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1716 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1717 if (k->oop_is_instance()) {
1718 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1719 if (type_annotations != NULL) {
1720 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1721 return (jbyteArray) JNIHandles::make_local(env, a);
1722 }
1723 }
1724 }
1725 return NULL;
1726 JVM_END
1727
1728 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1729 assert (method != NULL, "illegal method");
1730 JVMWrapper("JVM_GetMethodTypeAnnotations");
1731
1732 // method is a handle to a java.lang.reflect.Method object
1733 Method* m = jvm_get_method_common(method);
1734 if (m == NULL) {
1735 return NULL;
1736 }
1737
1738 AnnotationArray* type_annotations = m->type_annotations();
1739 if (type_annotations != NULL) {
1740 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1741 return (jbyteArray) JNIHandles::make_local(env, a);
1742 }
1743
1744 return NULL;
1745 JVM_END
1746
1747 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1748 assert (field != NULL, "illegal field");
1749 JVMWrapper("JVM_GetFieldTypeAnnotations");
1750
1751 fieldDescriptor fd;
1752 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1753 if (!gotFd) {
1754 return NULL;
1755 }
1756
1757 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1758 JVM_END
1759
1760 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1761 if (!cp->is_within_bounds(index)) {
1762 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1763 }
1764 }
1765
1766 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1767 {
1768 JVMWrapper("JVM_GetMethodParameters");
1769 // method is a handle to a java.lang.reflect.Method object
1770 Method* method_ptr = jvm_get_method_common(method);
1771 methodHandle mh (THREAD, method_ptr);
1772 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1773 const int num_params = mh->method_parameters_length();
1774
1775 if (0 != num_params) {
1776 // make sure all the symbols are properly formatted
1777 for (int i = 0; i < num_params; i++) {
1778 MethodParametersElement* params = mh->method_parameters_start();
1779 int index = params[i].name_cp_index;
1780 bounds_check(mh->constants(), index, CHECK_NULL);
1781
1782 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1783 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1784 "Wrong type at constant pool index");
1785 }
1786
1787 }
1788
1789 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1790 objArrayHandle result (THREAD, result_oop);
1791
1792 for (int i = 0; i < num_params; i++) {
1793 MethodParametersElement* params = mh->method_parameters_start();
1794 // For a 0 index, give a NULL symbol
1795 Symbol* sym = 0 != params[i].name_cp_index ?
1796 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1797 int flags = params[i].flags;
1798 oop param = Reflection::new_parameter(reflected_method, i, sym,
1799 flags, CHECK_NULL);
1800 result->obj_at_put(i, param);
1801 }
1802 return (jobjectArray)JNIHandles::make_local(env, result());
1803 } else {
1804 return (jobjectArray)NULL;
1805 }
1806 }
1807 JVM_END
1808
1809 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1810
1811 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1812 {
1813 JVMWrapper("JVM_GetClassDeclaredFields");
1814 JvmtiVMObjectAllocEventCollector oam;
1815
1816 // Exclude primitive types and array types
1817 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1818 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1819 // Return empty array
1820 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1821 return (jobjectArray) JNIHandles::make_local(env, res);
1822 }
1823
1824 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1825 constantPoolHandle cp(THREAD, k->constants());
1826
1827 // Ensure class is linked
1828 k->link_class(CHECK_NULL);
1829
1830 // 4496456 We need to filter out java.lang.Throwable.backtrace
1831 bool skip_backtrace = false;
1832
1833 // Allocate result
1834 int num_fields;
1835
1836 if (publicOnly) {
1837 num_fields = 0;
1838 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1839 if (fs.access_flags().is_public()) ++num_fields;
1840 }
1841 } else {
1842 num_fields = k->java_fields_count();
1843
1844 if (k() == SystemDictionary::Throwable_klass()) {
1845 num_fields--;
1846 skip_backtrace = true;
1847 }
1848 }
1849
1850 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1851 objArrayHandle result (THREAD, r);
1852
1853 int out_idx = 0;
1854 fieldDescriptor fd;
1855 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1856 if (skip_backtrace) {
1857 // 4496456 skip java.lang.Throwable.backtrace
1858 int offset = fs.offset();
1859 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1860 }
1861
1862 if (!publicOnly || fs.access_flags().is_public()) {
1863 fd.reinitialize(k(), fs.index());
1864 oop field = Reflection::new_field(&fd, CHECK_NULL);
1865 result->obj_at_put(out_idx, field);
1866 ++out_idx;
1867 }
1868 }
1869 assert(out_idx == num_fields, "just checking");
1870 return (jobjectArray) JNIHandles::make_local(env, result());
1871 }
1872 JVM_END
1873
1874 static bool select_method(methodHandle method, bool want_constructor) {
1875 if (want_constructor) {
1876 return (method->is_initializer() && !method->is_static());
1877 } else {
1878 return (!method->is_initializer() && !method->is_overpass());
1879 }
1880 }
1881
1882 static jobjectArray get_class_declared_methods_helper(
1883 JNIEnv *env,
1884 jclass ofClass, jboolean publicOnly,
1885 bool want_constructor,
1886 Klass* klass, TRAPS) {
1887
1888 JvmtiVMObjectAllocEventCollector oam;
1889
1890 // Exclude primitive types and array types
1891 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1892 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1893 // Return empty array
1894 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1895 return (jobjectArray) JNIHandles::make_local(env, res);
1896 }
1897
1898 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1899
1900 // Ensure class is linked
1901 k->link_class(CHECK_NULL);
1902
1903 Array<Method*>* methods = k->methods();
1904 int methods_length = methods->length();
1905
1906 // Save original method_idnum in case of redefinition, which can change
1907 // the idnum of obsolete methods. The new method will have the same idnum
1908 // but if we refresh the methods array, the counts will be wrong.
1909 ResourceMark rm(THREAD);
1910 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1911 int num_methods = 0;
1912
1913 for (int i = 0; i < methods_length; i++) {
1914 methodHandle method(THREAD, methods->at(i));
1915 if (select_method(method, want_constructor)) {
1916 if (!publicOnly || method->is_public()) {
1917 idnums->push(method->method_idnum());
1918 ++num_methods;
1919 }
1920 }
1921 }
1922
1923 // Allocate result
1924 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1925 objArrayHandle result (THREAD, r);
1926
1927 // Now just put the methods that we selected above, but go by their idnum
1928 // in case of redefinition. The methods can be redefined at any safepoint,
1929 // so above when allocating the oop array and below when creating reflect
1930 // objects.
1931 for (int i = 0; i < num_methods; i++) {
1932 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1933 if (method.is_null()) {
1934 // Method may have been deleted and seems this API can handle null
1935 // Otherwise should probably put a method that throws NSME
1936 result->obj_at_put(i, NULL);
1937 } else {
1938 oop m;
1939 if (want_constructor) {
1940 m = Reflection::new_constructor(method, CHECK_NULL);
1941 } else {
1942 m = Reflection::new_method(method, false, CHECK_NULL);
1943 }
1944 result->obj_at_put(i, m);
1945 }
1946 }
1947
1948 return (jobjectArray) JNIHandles::make_local(env, result());
1949 }
1950
1951 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1952 {
1953 JVMWrapper("JVM_GetClassDeclaredMethods");
1954 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1955 /*want_constructor*/ false,
1956 SystemDictionary::reflect_Method_klass(), THREAD);
1957 }
1958 JVM_END
1959
1960 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1961 {
1962 JVMWrapper("JVM_GetClassDeclaredConstructors");
1963 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1964 /*want_constructor*/ true,
1965 SystemDictionary::reflect_Constructor_klass(), THREAD);
1966 }
1967 JVM_END
1968
1969 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1970 {
1971 JVMWrapper("JVM_GetClassAccessFlags");
1972 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1973 // Primitive type
1974 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1975 }
1976
1977 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1978 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1979 }
1980 JVM_END
1981
1982
1983 // Constant pool access //////////////////////////////////////////////////////////
1984
1985 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1986 {
1987 JVMWrapper("JVM_GetClassConstantPool");
1988 JvmtiVMObjectAllocEventCollector oam;
1989
1990 // Return null for primitives and arrays
1991 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1992 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1993 if (k->oop_is_instance()) {
1994 instanceKlassHandle k_h(THREAD, k);
1995 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1996 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1997 return JNIHandles::make_local(jcp());
1998 }
1999 }
2000 return NULL;
2001 }
2002 JVM_END
2003
2004
2005 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2006 {
2007 JVMWrapper("JVM_ConstantPoolGetSize");
2008 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2009 return cp->length();
2010 }
2011 JVM_END
2012
2013
2014 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2015 {
2016 JVMWrapper("JVM_ConstantPoolGetClassAt");
2017 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2018 bounds_check(cp, index, CHECK_NULL);
2019 constantTag tag = cp->tag_at(index);
2020 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2022 }
2023 Klass* k = cp->klass_at(index, CHECK_NULL);
2024 return (jclass) JNIHandles::make_local(k->java_mirror());
2025 }
2026 JVM_END
2027
2028 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2029 {
2030 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2031 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2032 bounds_check(cp, index, CHECK_NULL);
2033 constantTag tag = cp->tag_at(index);
2034 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2035 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2036 }
2037 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2038 if (k == NULL) return NULL;
2039 return (jclass) JNIHandles::make_local(k->java_mirror());
2040 }
2041 JVM_END
2042
2043 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2044 constantTag tag = cp->tag_at(index);
2045 if (!tag.is_method() && !tag.is_interface_method()) {
2046 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2047 }
2048 int klass_ref = cp->uncached_klass_ref_index_at(index);
2049 Klass* k_o;
2050 if (force_resolution) {
2051 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2052 } else {
2053 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2054 if (k_o == NULL) return NULL;
2055 }
2056 instanceKlassHandle k(THREAD, k_o);
2057 Symbol* name = cp->uncached_name_ref_at(index);
2058 Symbol* sig = cp->uncached_signature_ref_at(index);
2059 methodHandle m (THREAD, k->find_method(name, sig));
2060 if (m.is_null()) {
2061 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2062 }
2063 oop method;
2064 if (!m->is_initializer() || m->is_static()) {
2065 method = Reflection::new_method(m, true, CHECK_NULL);
2066 } else {
2067 method = Reflection::new_constructor(m, CHECK_NULL);
2068 }
2069 return JNIHandles::make_local(method);
2070 }
2071
2072 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2073 {
2074 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2075 JvmtiVMObjectAllocEventCollector oam;
2076 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2077 bounds_check(cp, index, CHECK_NULL);
2078 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2079 return res;
2080 }
2081 JVM_END
2082
2083 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2084 {
2085 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2086 JvmtiVMObjectAllocEventCollector oam;
2087 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2088 bounds_check(cp, index, CHECK_NULL);
2089 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2090 return res;
2091 }
2092 JVM_END
2093
2094 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2095 constantTag tag = cp->tag_at(index);
2096 if (!tag.is_field()) {
2097 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2098 }
2099 int klass_ref = cp->uncached_klass_ref_index_at(index);
2100 Klass* k_o;
2101 if (force_resolution) {
2102 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2103 } else {
2104 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2105 if (k_o == NULL) return NULL;
2106 }
2107 instanceKlassHandle k(THREAD, k_o);
2108 Symbol* name = cp->uncached_name_ref_at(index);
2109 Symbol* sig = cp->uncached_signature_ref_at(index);
2110 fieldDescriptor fd;
2111 Klass* target_klass = k->find_field(name, sig, &fd);
2112 if (target_klass == NULL) {
2113 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2114 }
2115 oop field = Reflection::new_field(&fd, CHECK_NULL);
2116 return JNIHandles::make_local(field);
2117 }
2118
2119 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2120 {
2121 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2122 JvmtiVMObjectAllocEventCollector oam;
2123 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2124 bounds_check(cp, index, CHECK_NULL);
2125 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2126 return res;
2127 }
2128 JVM_END
2129
2130 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2131 {
2132 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2133 JvmtiVMObjectAllocEventCollector oam;
2134 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2135 bounds_check(cp, index, CHECK_NULL);
2136 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2137 return res;
2138 }
2139 JVM_END
2140
2141 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2142 {
2143 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2144 JvmtiVMObjectAllocEventCollector oam;
2145 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2146 bounds_check(cp, index, CHECK_NULL);
2147 constantTag tag = cp->tag_at(index);
2148 if (!tag.is_field_or_method()) {
2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2150 }
2151 int klass_ref = cp->uncached_klass_ref_index_at(index);
2152 Symbol* klass_name = cp->klass_name_at(klass_ref);
2153 Symbol* member_name = cp->uncached_name_ref_at(index);
2154 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2155 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2156 objArrayHandle dest(THREAD, dest_o);
2157 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2158 dest->obj_at_put(0, str());
2159 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2160 dest->obj_at_put(1, str());
2161 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2162 dest->obj_at_put(2, str());
2163 return (jobjectArray) JNIHandles::make_local(dest());
2164 }
2165 JVM_END
2166
2167 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2168 {
2169 JVMWrapper("JVM_ConstantPoolGetIntAt");
2170 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_0);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_int()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 return cp->int_at(index);
2177 }
2178 JVM_END
2179
2180 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2181 {
2182 JVMWrapper("JVM_ConstantPoolGetLongAt");
2183 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2184 bounds_check(cp, index, CHECK_(0L));
2185 constantTag tag = cp->tag_at(index);
2186 if (!tag.is_long()) {
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2188 }
2189 return cp->long_at(index);
2190 }
2191 JVM_END
2192
2193 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2194 {
2195 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2196 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_(0.0f));
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_float()) {
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 return cp->float_at(index);
2203 }
2204 JVM_END
2205
2206 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2207 {
2208 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2209 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2210 bounds_check(cp, index, CHECK_(0.0));
2211 constantTag tag = cp->tag_at(index);
2212 if (!tag.is_double()) {
2213 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2214 }
2215 return cp->double_at(index);
2216 }
2217 JVM_END
2218
2219 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2220 {
2221 JVMWrapper("JVM_ConstantPoolGetStringAt");
2222 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2223 bounds_check(cp, index, CHECK_NULL);
2224 constantTag tag = cp->tag_at(index);
2225 if (!tag.is_string()) {
2226 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2227 }
2228 oop str = cp->string_at(index, CHECK_NULL);
2229 return (jstring) JNIHandles::make_local(str);
2230 }
2231 JVM_END
2232
2233 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2234 {
2235 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2236 JvmtiVMObjectAllocEventCollector oam;
2237 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2238 bounds_check(cp, index, CHECK_NULL);
2239 constantTag tag = cp->tag_at(index);
2240 if (!tag.is_symbol()) {
2241 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2242 }
2243 Symbol* sym = cp->symbol_at(index);
2244 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2245 return (jstring) JNIHandles::make_local(str());
2246 }
2247 JVM_END
2248
2249
2250 // Assertion support. //////////////////////////////////////////////////////////
2251
2252 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2253 JVMWrapper("JVM_DesiredAssertionStatus");
2254 assert(cls != NULL, "bad class");
2255
2256 oop r = JNIHandles::resolve(cls);
2257 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2258 if (java_lang_Class::is_primitive(r)) return false;
2259
2260 Klass* k = java_lang_Class::as_Klass(r);
2261 assert(k->oop_is_instance(), "must be an instance klass");
2262 if (! k->oop_is_instance()) return false;
2263
2264 ResourceMark rm(THREAD);
2265 const char* name = k->name()->as_C_string();
2266 bool system_class = k->class_loader() == NULL;
2267 return JavaAssertions::enabled(name, system_class);
2268
2269 JVM_END
2270
2271
2272 // Return a new AssertionStatusDirectives object with the fields filled in with
2273 // command-line assertion arguments (i.e., -ea, -da).
2274 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2275 JVMWrapper("JVM_AssertionStatusDirectives");
2276 JvmtiVMObjectAllocEventCollector oam;
2277 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2278 return JNIHandles::make_local(env, asd);
2279 JVM_END
2280
2281 // Verification ////////////////////////////////////////////////////////////////////////////////
2282
2283 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2284
2285 // RedefineClasses support: bug 6214132 caused verification to fail.
2286 // All functions from this section should call the jvmtiThreadSate function:
2287 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2288 // The function returns a Klass* of the _scratch_class if the verifier
2289 // was invoked in the middle of the class redefinition.
2290 // Otherwise it returns its argument value which is the _the_class Klass*.
2291 // Please, refer to the description in the jvmtiThreadSate.hpp.
2292
2293 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2294 JVMWrapper("JVM_GetClassNameUTF");
2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2297 return k->name()->as_utf8();
2298 JVM_END
2299
2300
2301 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2302 JVMWrapper("JVM_GetClassCPTypes");
2303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 // types will have length zero if this is not an InstanceKlass
2306 // (length is determined by call to JVM_GetClassCPEntriesCount)
2307 if (k->oop_is_instance()) {
2308 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2309 for (int index = cp->length() - 1; index >= 0; index--) {
2310 constantTag tag = cp->tag_at(index);
2311 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2312 }
2313 }
2314 JVM_END
2315
2316
2317 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2318 JVMWrapper("JVM_GetClassCPEntriesCount");
2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 if (!k->oop_is_instance())
2322 return 0;
2323 return InstanceKlass::cast(k)->constants()->length();
2324 JVM_END
2325
2326
2327 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2328 JVMWrapper("JVM_GetClassFieldsCount");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 if (!k->oop_is_instance())
2332 return 0;
2333 return InstanceKlass::cast(k)->java_fields_count();
2334 JVM_END
2335
2336
2337 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2338 JVMWrapper("JVM_GetClassMethodsCount");
2339 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 if (!k->oop_is_instance())
2342 return 0;
2343 return InstanceKlass::cast(k)->methods()->length();
2344 JVM_END
2345
2346
2347 // The following methods, used for the verifier, are never called with
2348 // array klasses, so a direct cast to InstanceKlass is safe.
2349 // Typically, these methods are called in a loop with bounds determined
2350 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2351 // zero for arrays.
2352 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2353 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2357 int length = method->checked_exceptions_length();
2358 if (length > 0) {
2359 CheckedExceptionElement* table= method->checked_exceptions_start();
2360 for (int i = 0; i < length; i++) {
2361 exceptions[i] = table[i].class_cp_index;
2362 }
2363 }
2364 JVM_END
2365
2366
2367 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2368 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372 return method->checked_exceptions_length();
2373 JVM_END
2374
2375
2376 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2377 JVMWrapper("JVM_GetMethodIxByteCode");
2378 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2381 memcpy(code, method->code_base(), method->code_size());
2382 JVM_END
2383
2384
2385 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2386 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2390 return method->code_size();
2391 JVM_END
2392
2393
2394 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2395 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 ExceptionTable extable(method);
2400 entry->start_pc = extable.start_pc(entry_index);
2401 entry->end_pc = extable.end_pc(entry_index);
2402 entry->handler_pc = extable.handler_pc(entry_index);
2403 entry->catchType = extable.catch_type_index(entry_index);
2404 JVM_END
2405
2406
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2408 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->exception_table_length();
2413 JVM_END
2414
2415
2416 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2417 JVMWrapper("JVM_GetMethodIxModifiers");
2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2421 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2422 JVM_END
2423
2424
2425 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2426 JVMWrapper("JVM_GetFieldIxModifiers");
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2430 JVM_END
2431
2432
2433 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2434 JVMWrapper("JVM_GetMethodIxLocalsCount");
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2438 return method->max_locals();
2439 JVM_END
2440
2441
2442 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2443 JVMWrapper("JVM_GetMethodIxArgsSize");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2447 return method->size_of_parameters();
2448 JVM_END
2449
2450
2451 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2452 JVMWrapper("JVM_GetMethodIxMaxStack");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2456 return method->verifier_max_stack();
2457 JVM_END
2458
2459
2460 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2461 JVMWrapper("JVM_IsConstructorIx");
2462 ResourceMark rm(THREAD);
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2466 return method->name() == vmSymbols::object_initializer_name();
2467 JVM_END
2468
2469
2470 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2471 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2472 ResourceMark rm(THREAD);
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2476 return method->is_overpass();
2477 JVM_END
2478
2479 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2480 JVMWrapper("JVM_GetMethodIxIxUTF");
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2484 return method->name()->as_utf8();
2485 JVM_END
2486
2487
2488 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2489 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2493 return method->signature()->as_utf8();
2494 JVM_END
2495
2496 /**
2497 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2498 * read entries in the constant pool. Since the old verifier always
2499 * works on a copy of the code, it will not see any rewriting that
2500 * may possibly occur in the middle of verification. So it is important
2501 * that nothing it calls tries to use the cpCache instead of the raw
2502 * constant pool, so we must use cp->uncached_x methods when appropriate.
2503 */
2504 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2505 JVMWrapper("JVM_GetCPFieldNameUTF");
2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2508 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2509 switch (cp->tag_at(cp_index).value()) {
2510 case JVM_CONSTANT_Fieldref:
2511 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2512 default:
2513 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2514 }
2515 ShouldNotReachHere();
2516 return NULL;
2517 JVM_END
2518
2519
2520 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2521 JVMWrapper("JVM_GetCPMethodNameUTF");
2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2525 switch (cp->tag_at(cp_index).value()) {
2526 case JVM_CONSTANT_InterfaceMethodref:
2527 case JVM_CONSTANT_Methodref:
2528 case JVM_CONSTANT_NameAndType: // for invokedynamic
2529 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2530 default:
2531 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2532 }
2533 ShouldNotReachHere();
2534 return NULL;
2535 JVM_END
2536
2537
2538 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2539 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2543 switch (cp->tag_at(cp_index).value()) {
2544 case JVM_CONSTANT_InterfaceMethodref:
2545 case JVM_CONSTANT_Methodref:
2546 case JVM_CONSTANT_NameAndType: // for invokedynamic
2547 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2548 default:
2549 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2550 }
2551 ShouldNotReachHere();
2552 return NULL;
2553 JVM_END
2554
2555
2556 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2557 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2561 switch (cp->tag_at(cp_index).value()) {
2562 case JVM_CONSTANT_Fieldref:
2563 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2564 default:
2565 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2566 }
2567 ShouldNotReachHere();
2568 return NULL;
2569 JVM_END
2570
2571
2572 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2573 JVMWrapper("JVM_GetCPClassNameUTF");
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2577 Symbol* classname = cp->klass_name_at(cp_index);
2578 return classname->as_utf8();
2579 JVM_END
2580
2581
2582 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2583 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref: {
2589 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2590 Symbol* classname = cp->klass_name_at(class_index);
2591 return classname->as_utf8();
2592 }
2593 default:
2594 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2595 }
2596 ShouldNotReachHere();
2597 return NULL;
2598 JVM_END
2599
2600
2601 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2602 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2603 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2604 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2605 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2606 switch (cp->tag_at(cp_index).value()) {
2607 case JVM_CONSTANT_Methodref:
2608 case JVM_CONSTANT_InterfaceMethodref: {
2609 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2610 Symbol* classname = cp->klass_name_at(class_index);
2611 return classname->as_utf8();
2612 }
2613 default:
2614 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2615 }
2616 ShouldNotReachHere();
2617 return NULL;
2618 JVM_END
2619
2620
2621 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2622 JVMWrapper("JVM_GetCPFieldModifiers");
2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2627 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2628 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2629 switch (cp->tag_at(cp_index).value()) {
2630 case JVM_CONSTANT_Fieldref: {
2631 Symbol* name = cp->uncached_name_ref_at(cp_index);
2632 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2633 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2634 if (fs.name() == name && fs.signature() == signature) {
2635 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2636 }
2637 }
2638 return -1;
2639 }
2640 default:
2641 fatal("JVM_GetCPFieldModifiers: illegal constant");
2642 }
2643 ShouldNotReachHere();
2644 return 0;
2645 JVM_END
2646
2647
2648 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2649 JVMWrapper("JVM_GetCPMethodModifiers");
2650 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2651 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2652 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2653 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2654 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2655 switch (cp->tag_at(cp_index).value()) {
2656 case JVM_CONSTANT_Methodref:
2657 case JVM_CONSTANT_InterfaceMethodref: {
2658 Symbol* name = cp->uncached_name_ref_at(cp_index);
2659 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2660 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2661 int methods_count = methods->length();
2662 for (int i = 0; i < methods_count; i++) {
2663 Method* method = methods->at(i);
2664 if (method->name() == name && method->signature() == signature) {
2665 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2666 }
2667 }
2668 return -1;
2669 }
2670 default:
2671 fatal("JVM_GetCPMethodModifiers: illegal constant");
2672 }
2673 ShouldNotReachHere();
2674 return 0;
2675 JVM_END
2676
2677
2678 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2679
2680 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2681 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2682 JVM_END
2683
2684
2685 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2686 JVMWrapper("JVM_IsSameClassPackage");
2687 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2688 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2689 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2690 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2691 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2692 JVM_END
2693
2694
2695 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2696
2697 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2698 JVMWrapper2("JVM_Open (%s)", fname);
2699
2700 //%note jvm_r6
2701 int result = os::open(fname, flags, mode);
2702 if (result >= 0) {
2703 return result;
2704 } else {
2705 switch(errno) {
2706 case EEXIST:
2707 return JVM_EEXIST;
2708 default:
2709 return -1;
2710 }
2711 }
2712 JVM_END
2713
2714
2715 JVM_LEAF(jint, JVM_Close(jint fd))
2716 JVMWrapper2("JVM_Close (0x%x)", fd);
2717 //%note jvm_r6
2718 return os::close(fd);
2719 JVM_END
2720
2721
2722 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2723 JVMWrapper2("JVM_Read (0x%x)", fd);
2724
2725 //%note jvm_r6
2726 return (jint)os::restartable_read(fd, buf, nbytes);
2727 JVM_END
2728
2729
2730 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2731 JVMWrapper2("JVM_Write (0x%x)", fd);
2732
2733 //%note jvm_r6
2734 return (jint)os::write(fd, buf, nbytes);
2735 JVM_END
2736
2737
2738 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2739 JVMWrapper2("JVM_Available (0x%x)", fd);
2740 //%note jvm_r6
2741 return os::available(fd, pbytes);
2742 JVM_END
2743
2744
2745 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2746 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2747 //%note jvm_r6
2748 return os::lseek(fd, offset, whence);
2749 JVM_END
2750
2751
2752 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2753 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2754 return os::ftruncate(fd, length);
2755 JVM_END
2756
2757
2758 JVM_LEAF(jint, JVM_Sync(jint fd))
2759 JVMWrapper2("JVM_Sync (0x%x)", fd);
2760 //%note jvm_r6
2761 return os::fsync(fd);
2762 JVM_END
2763
2764
2765 // Printing support //////////////////////////////////////////////////
2766 extern "C" {
2767
2768 ATTRIBUTE_PRINTF(3, 0)
2769 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2770 // see bug 4399518, 4417214
2771 if ((intptr_t)count <= 0) return -1;
2772 return vsnprintf(str, count, fmt, args);
2773 }
2774
2775 ATTRIBUTE_PRINTF(3, 0)
2776 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2777 va_list args;
2778 int len;
2779 va_start(args, fmt);
2780 len = jio_vsnprintf(str, count, fmt, args);
2781 va_end(args);
2782 return len;
2783 }
2784
2785 ATTRIBUTE_PRINTF(2,3)
2786 int jio_fprintf(FILE* f, const char *fmt, ...) {
2787 int len;
2788 va_list args;
2789 va_start(args, fmt);
2790 len = jio_vfprintf(f, fmt, args);
2791 va_end(args);
2792 return len;
2793 }
2794
2795 ATTRIBUTE_PRINTF(2, 0)
2796 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2797 if (Arguments::vfprintf_hook() != NULL) {
2798 return Arguments::vfprintf_hook()(f, fmt, args);
2799 } else {
2800 return vfprintf(f, fmt, args);
2801 }
2802 }
2803
2804 ATTRIBUTE_PRINTF(1, 2)
2805 JNIEXPORT int jio_printf(const char *fmt, ...) {
2806 int len;
2807 va_list args;
2808 va_start(args, fmt);
2809 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2810 va_end(args);
2811 return len;
2812 }
2813
2814
2815 // HotSpot specific jio method
2816 void jio_print(const char* s) {
2817 // Try to make this function as atomic as possible.
2818 if (Arguments::vfprintf_hook() != NULL) {
2819 jio_fprintf(defaultStream::output_stream(), "%s", s);
2820 } else {
2821 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2822 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2823 }
2824 }
2825
2826 } // Extern C
2827
2828 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2829
2830 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2831 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2832 // OSThread objects. The exception to this rule is when the target object is the thread
2833 // doing the operation, in which case we know that the thread won't exit until the
2834 // operation is done (all exits being voluntary). There are a few cases where it is
2835 // rather silly to do operations on yourself, like resuming yourself or asking whether
2836 // you are alive. While these can still happen, they are not subject to deadlocks if
2837 // the lock is held while the operation occurs (this is not the case for suspend, for
2838 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2839 // implementation is local to this file, we always lock Threads_lock for that one.
2840
2841 static void thread_entry(JavaThread* thread, TRAPS) {
2842 HandleMark hm(THREAD);
2843 Handle obj(THREAD, thread->threadObj());
2844 JavaValue result(T_VOID);
2845 JavaCalls::call_virtual(&result,
2846 obj,
2847 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2848 vmSymbols::run_method_name(),
2849 vmSymbols::void_method_signature(),
2850 THREAD);
2851 }
2852
2853
2854 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2855 JVMWrapper("JVM_StartThread");
2856 JavaThread *native_thread = NULL;
2857
2858 // We cannot hold the Threads_lock when we throw an exception,
2859 // due to rank ordering issues. Example: we might need to grab the
2860 // Heap_lock while we construct the exception.
2861 bool throw_illegal_thread_state = false;
2862
2863 // We must release the Threads_lock before we can post a jvmti event
2864 // in Thread::start.
2865 {
2866 // Ensure that the C++ Thread and OSThread structures aren't freed before
2867 // we operate.
2868 MutexLocker mu(Threads_lock);
2869
2870 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2871 // re-starting an already started thread, so we should usually find
2872 // that the JavaThread is null. However for a JNI attached thread
2873 // there is a small window between the Thread object being created
2874 // (with its JavaThread set) and the update to its threadStatus, so we
2875 // have to check for this
2876 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2877 throw_illegal_thread_state = true;
2878 } else {
2879 // We could also check the stillborn flag to see if this thread was already stopped, but
2880 // for historical reasons we let the thread detect that itself when it starts running
2881
2882 jlong size =
2883 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2884 // Allocate the C++ Thread structure and create the native thread. The
2885 // stack size retrieved from java is signed, but the constructor takes
2886 // size_t (an unsigned type), so avoid passing negative values which would
2887 // result in really large stacks.
2888 size_t sz = size > 0 ? (size_t) size : 0;
2889 native_thread = new JavaThread(&thread_entry, sz);
2890
2891 // At this point it may be possible that no osthread was created for the
2892 // JavaThread due to lack of memory. Check for this situation and throw
2893 // an exception if necessary. Eventually we may want to change this so
2894 // that we only grab the lock if the thread was created successfully -
2895 // then we can also do this check and throw the exception in the
2896 // JavaThread constructor.
2897 if (native_thread->osthread() != NULL) {
2898 // Note: the current thread is not being used within "prepare".
2899 native_thread->prepare(jthread);
2900 }
2901 }
2902 }
2903
2904 if (throw_illegal_thread_state) {
2905 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2906 }
2907
2908 assert(native_thread != NULL, "Starting null thread?");
2909
2910 if (native_thread->osthread() == NULL) {
2911 // No one should hold a reference to the 'native_thread'.
2912 delete native_thread;
2913 if (JvmtiExport::should_post_resource_exhausted()) {
2914 JvmtiExport::post_resource_exhausted(
2915 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2916 os::native_thread_creation_failed_msg());
2917 }
2918 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2919 os::native_thread_creation_failed_msg());
2920 }
2921
2922 Thread::start(native_thread);
2923
2924 JVM_END
2925
2926 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2927 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2928 // but is thought to be reliable and simple. In the case, where the receiver is the
2929 // same thread as the sender, no safepoint is needed.
2930 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2931 JVMWrapper("JVM_StopThread");
2932
2933 oop java_throwable = JNIHandles::resolve(throwable);
2934 if (java_throwable == NULL) {
2935 THROW(vmSymbols::java_lang_NullPointerException());
2936 }
2937 oop java_thread = JNIHandles::resolve_non_null(jthread);
2938 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2939 Events::log_exception(JavaThread::current(),
2940 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2941 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2942 // First check if thread is alive
2943 if (receiver != NULL) {
2944 // Check if exception is getting thrown at self (use oop equality, since the
2945 // target object might exit)
2946 if (java_thread == thread->threadObj()) {
2947 THROW_OOP(java_throwable);
2948 } else {
2949 // Enques a VM_Operation to stop all threads and then deliver the exception...
2950 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2951 }
2952 }
2953 else {
2954 // Either:
2955 // - target thread has not been started before being stopped, or
2956 // - target thread already terminated
2957 // We could read the threadStatus to determine which case it is
2958 // but that is overkill as it doesn't matter. We must set the
2959 // stillborn flag for the first case, and if the thread has already
2960 // exited setting this flag has no affect
2961 java_lang_Thread::set_stillborn(java_thread);
2962 }
2963 JVM_END
2964
2965
2966 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2967 JVMWrapper("JVM_IsThreadAlive");
2968
2969 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2970 return java_lang_Thread::is_alive(thread_oop);
2971 JVM_END
2972
2973
2974 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2975 JVMWrapper("JVM_SuspendThread");
2976 oop java_thread = JNIHandles::resolve_non_null(jthread);
2977 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2978
2979 if (receiver != NULL) {
2980 // thread has run and has not exited (still on threads list)
2981
2982 {
2983 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2984 if (receiver->is_external_suspend()) {
2985 // Don't allow nested external suspend requests. We can't return
2986 // an error from this interface so just ignore the problem.
2987 return;
2988 }
2989 if (receiver->is_exiting()) { // thread is in the process of exiting
2990 return;
2991 }
2992 receiver->set_external_suspend();
2993 }
2994
2995 // java_suspend() will catch threads in the process of exiting
2996 // and will ignore them.
2997 receiver->java_suspend();
2998
2999 // It would be nice to have the following assertion in all the
3000 // time, but it is possible for a racing resume request to have
3001 // resumed this thread right after we suspended it. Temporarily
3002 // enable this assertion if you are chasing a different kind of
3003 // bug.
3004 //
3005 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3006 // receiver->is_being_ext_suspended(), "thread is not suspended");
3007 }
3008 JVM_END
3009
3010
3011 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3012 JVMWrapper("JVM_ResumeThread");
3013 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3014 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3015 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3016 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3017 // looks at it.
3018 MutexLocker ml(Threads_lock);
3019 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3020 if (thr != NULL) {
3021 // the thread has run and is not in the process of exiting
3022 thr->java_resume();
3023 }
3024 JVM_END
3025
3026
3027 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3028 JVMWrapper("JVM_SetThreadPriority");
3029 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3030 MutexLocker ml(Threads_lock);
3031 oop java_thread = JNIHandles::resolve_non_null(jthread);
3032 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3033 JavaThread* thr = java_lang_Thread::thread(java_thread);
3034 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3035 Thread::set_priority(thr, (ThreadPriority)prio);
3036 }
3037 JVM_END
3038
3039
3040 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3041 JVMWrapper("JVM_Yield");
3042 if (os::dont_yield()) return;
3043 HOTSPOT_THREAD_YIELD();
3044
3045 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3046 // Critical for similar threading behaviour
3047 if (ConvertYieldToSleep) {
3048 os::sleep(thread, MinSleepInterval, false);
3049 } else {
3050 os::naked_yield();
3051 }
3052 JVM_END
3053
3054
3055 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3056 JVMWrapper("JVM_Sleep");
3057
3058 if (millis < 0) {
3059 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3060 }
3061
3062 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3063 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3064 }
3065
3066 // Save current thread state and restore it at the end of this block.
3067 // And set new thread state to SLEEPING.
3068 JavaThreadSleepState jtss(thread);
3069
3070 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3071
3072 EventThreadSleep event;
3073
3074 if (millis == 0) {
3075 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3076 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3077 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3078 // for SOLARIS
3079 if (ConvertSleepToYield) {
3080 os::naked_yield();
3081 } else {
3082 ThreadState old_state = thread->osthread()->get_state();
3083 thread->osthread()->set_state(SLEEPING);
3084 os::sleep(thread, MinSleepInterval, false);
3085 thread->osthread()->set_state(old_state);
3086 }
3087 } else {
3088 ThreadState old_state = thread->osthread()->get_state();
3089 thread->osthread()->set_state(SLEEPING);
3090 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3091 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3092 // us while we were sleeping. We do not overwrite those.
3093 if (!HAS_PENDING_EXCEPTION) {
3094 if (event.should_commit()) {
3095 event.set_time(millis);
3096 event.commit();
3097 }
3098 HOTSPOT_THREAD_SLEEP_END(1);
3099
3100 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3101 // to properly restore the thread state. That's likely wrong.
3102 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3103 }
3104 }
3105 thread->osthread()->set_state(old_state);
3106 }
3107 if (event.should_commit()) {
3108 event.set_time(millis);
3109 event.commit();
3110 }
3111 HOTSPOT_THREAD_SLEEP_END(0);
3112 JVM_END
3113
3114 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3115 JVMWrapper("JVM_CurrentThread");
3116 oop jthread = thread->threadObj();
3117 assert (thread != NULL, "no current thread!");
3118 return JNIHandles::make_local(env, jthread);
3119 JVM_END
3120
3121
3122 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3123 JVMWrapper("JVM_CountStackFrames");
3124
3125 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3126 oop java_thread = JNIHandles::resolve_non_null(jthread);
3127 bool throw_illegal_thread_state = false;
3128 int count = 0;
3129
3130 {
3131 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3132 // We need to re-resolve the java_thread, since a GC might have happened during the
3133 // acquire of the lock
3134 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3135
3136 if (thr == NULL) {
3137 // do nothing
3138 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3139 // Check whether this java thread has been suspended already. If not, throws
3140 // IllegalThreadStateException. We defer to throw that exception until
3141 // Threads_lock is released since loading exception class has to leave VM.
3142 // The correct way to test a thread is actually suspended is
3143 // wait_for_ext_suspend_completion(), but we can't call that while holding
3144 // the Threads_lock. The above tests are sufficient for our purposes
3145 // provided the walkability of the stack is stable - which it isn't
3146 // 100% but close enough for most practical purposes.
3147 throw_illegal_thread_state = true;
3148 } else {
3149 // Count all java activation, i.e., number of vframes
3150 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3151 // Native frames are not counted
3152 if (!vfst.method()->is_native()) count++;
3153 }
3154 }
3155 }
3156
3157 if (throw_illegal_thread_state) {
3158 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3159 "this thread is not suspended");
3160 }
3161 return count;
3162 JVM_END
3163
3164 // Consider: A better way to implement JVM_Interrupt() is to acquire
3165 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3166 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3167 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3168 // outside the critical section. Threads_lock is hot so we want to minimize
3169 // the hold-time. A cleaner interface would be to decompose interrupt into
3170 // two steps. The 1st phase, performed under Threads_lock, would return
3171 // a closure that'd be invoked after Threads_lock was dropped.
3172 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3173 // admit spurious wakeups.
3174
3175 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3176 JVMWrapper("JVM_Interrupt");
3177
3178 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3179 oop java_thread = JNIHandles::resolve_non_null(jthread);
3180 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3181 // We need to re-resolve the java_thread, since a GC might have happened during the
3182 // acquire of the lock
3183 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3184 if (thr != NULL) {
3185 Thread::interrupt(thr);
3186 }
3187 JVM_END
3188
3189
3190 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3191 JVMWrapper("JVM_IsInterrupted");
3192
3193 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3194 oop java_thread = JNIHandles::resolve_non_null(jthread);
3195 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3196 // We need to re-resolve the java_thread, since a GC might have happened during the
3197 // acquire of the lock
3198 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3199 if (thr == NULL) {
3200 return JNI_FALSE;
3201 } else {
3202 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3203 }
3204 JVM_END
3205
3206
3207 // Return true iff the current thread has locked the object passed in
3208
3209 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3210 JVMWrapper("JVM_HoldsLock");
3211 assert(THREAD->is_Java_thread(), "sanity check");
3212 if (obj == NULL) {
3213 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3214 }
3215 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3216 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3217 JVM_END
3218
3219
3220 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3221 JVMWrapper("JVM_DumpAllStacks");
3222 VM_PrintThreads op;
3223 VMThread::execute(&op);
3224 if (JvmtiExport::should_post_data_dump()) {
3225 JvmtiExport::post_data_dump();
3226 }
3227 JVM_END
3228
3229 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3230 JVMWrapper("JVM_SetNativeThreadName");
3231 ResourceMark rm(THREAD);
3232 oop java_thread = JNIHandles::resolve_non_null(jthread);
3233 JavaThread* thr = java_lang_Thread::thread(java_thread);
3234 // Thread naming only supported for the current thread, doesn't work for
3235 // target threads.
3236 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3237 // we don't set the name of an attached thread to avoid stepping
3238 // on other programs
3239 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3240 os::set_native_thread_name(thread_name);
3241 }
3242 JVM_END
3243
3244 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3245
3246 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3247 assert(jthread->is_Java_thread(), "must be a Java thread");
3248 if (jthread->privileged_stack_top() == NULL) return false;
3249 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3250 oop loader = jthread->privileged_stack_top()->class_loader();
3251 if (loader == NULL) return true;
3252 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3253 if (trusted) return true;
3254 }
3255 return false;
3256 }
3257
3258 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3259 JVMWrapper("JVM_CurrentLoadedClass");
3260 ResourceMark rm(THREAD);
3261
3262 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3263 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3264 bool trusted = is_trusted_frame(thread, &vfst);
3265 if (trusted) return NULL;
3266
3267 Method* m = vfst.method();
3268 if (!m->is_native()) {
3269 InstanceKlass* holder = m->method_holder();
3270 oop loader = holder->class_loader();
3271 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3272 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3273 }
3274 }
3275 }
3276 return NULL;
3277 JVM_END
3278
3279
3280 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3281 JVMWrapper("JVM_CurrentClassLoader");
3282 ResourceMark rm(THREAD);
3283
3284 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3285
3286 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3287 bool trusted = is_trusted_frame(thread, &vfst);
3288 if (trusted) return NULL;
3289
3290 Method* m = vfst.method();
3291 if (!m->is_native()) {
3292 InstanceKlass* holder = m->method_holder();
3293 assert(holder->is_klass(), "just checking");
3294 oop loader = holder->class_loader();
3295 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3296 return JNIHandles::make_local(env, loader);
3297 }
3298 }
3299 }
3300 return NULL;
3301 JVM_END
3302
3303
3304 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3305 JVMWrapper("JVM_GetClassContext");
3306 ResourceMark rm(THREAD);
3307 JvmtiVMObjectAllocEventCollector oam;
3308 vframeStream vfst(thread);
3309
3310 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3311 // This must only be called from SecurityManager.getClassContext
3312 Method* m = vfst.method();
3313 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3314 m->name() == vmSymbols::getClassContext_name() &&
3315 m->signature() == vmSymbols::void_class_array_signature())) {
3316 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3317 }
3318 }
3319
3320 // Collect method holders
3321 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3322 for (; !vfst.at_end(); vfst.security_next()) {
3323 Method* m = vfst.method();
3324 // Native frames are not returned
3325 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3326 Klass* holder = m->method_holder();
3327 assert(holder->is_klass(), "just checking");
3328 klass_array->append(holder);
3329 }
3330 }
3331
3332 // Create result array of type [Ljava/lang/Class;
3333 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3334 // Fill in mirrors corresponding to method holders
3335 for (int i = 0; i < klass_array->length(); i++) {
3336 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3337 }
3338
3339 return (jobjectArray) JNIHandles::make_local(env, result);
3340 JVM_END
3341
3342
3343 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3344 JVMWrapper("JVM_ClassDepth");
3345 ResourceMark rm(THREAD);
3346 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3347 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3348
3349 const char* str = java_lang_String::as_utf8_string(class_name_str());
3350 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3351 if (class_name_sym == NULL) {
3352 return -1;
3353 }
3354
3355 int depth = 0;
3356
3357 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3358 if (!vfst.method()->is_native()) {
3359 InstanceKlass* holder = vfst.method()->method_holder();
3360 assert(holder->is_klass(), "just checking");
3361 if (holder->name() == class_name_sym) {
3362 return depth;
3363 }
3364 depth++;
3365 }
3366 }
3367 return -1;
3368 JVM_END
3369
3370
3371 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3372 JVMWrapper("JVM_ClassLoaderDepth");
3373 ResourceMark rm(THREAD);
3374 int depth = 0;
3375 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3376 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3377 bool trusted = is_trusted_frame(thread, &vfst);
3378 if (trusted) return -1;
3379
3380 Method* m = vfst.method();
3381 if (!m->is_native()) {
3382 InstanceKlass* holder = m->method_holder();
3383 assert(holder->is_klass(), "just checking");
3384 oop loader = holder->class_loader();
3385 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3386 return depth;
3387 }
3388 depth++;
3389 }
3390 }
3391 return -1;
3392 JVM_END
3393
3394
3395 // java.lang.Package ////////////////////////////////////////////////////////////////
3396
3397
3398 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3399 JVMWrapper("JVM_GetSystemPackage");
3400 ResourceMark rm(THREAD);
3401 JvmtiVMObjectAllocEventCollector oam;
3402 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3403 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3404 return (jstring) JNIHandles::make_local(result);
3405 JVM_END
3406
3407
3408 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3409 JVMWrapper("JVM_GetSystemPackages");
3410 JvmtiVMObjectAllocEventCollector oam;
3411 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3412 return (jobjectArray) JNIHandles::make_local(result);
3413 JVM_END
3414
3415
3416 // ObjectInputStream ///////////////////////////////////////////////////////////////
3417
3418 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3419 if (current_class == NULL) {
3420 return true;
3421 }
3422 if ((current_class == field_class) || access.is_public()) {
3423 return true;
3424 }
3425
3426 if (access.is_protected()) {
3427 // See if current_class is a subclass of field_class
3428 if (current_class->is_subclass_of(field_class)) {
3429 return true;
3430 }
3431 }
3432
3433 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3434 }
3435
3436
3437 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3438 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3439 JVMWrapper("JVM_AllocateNewObject");
3440 JvmtiVMObjectAllocEventCollector oam;
3441 // Receiver is not used
3442 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3443 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3444
3445 // Cannot instantiate primitive types
3446 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3447 ResourceMark rm(THREAD);
3448 THROW_0(vmSymbols::java_lang_InvalidClassException());
3449 }
3450
3451 // Arrays not allowed here, must use JVM_AllocateNewArray
3452 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3453 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3454 ResourceMark rm(THREAD);
3455 THROW_0(vmSymbols::java_lang_InvalidClassException());
3456 }
3457
3458 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3459 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3460
3461 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3462
3463 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3464 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3465
3466 // Make sure klass is initialized, since we are about to instantiate one of them.
3467 curr_klass->initialize(CHECK_NULL);
3468
3469 methodHandle m (THREAD,
3470 init_klass->find_method(vmSymbols::object_initializer_name(),
3471 vmSymbols::void_method_signature()));
3472 if (m.is_null()) {
3473 ResourceMark rm(THREAD);
3474 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3475 Method::name_and_sig_as_C_string(init_klass(),
3476 vmSymbols::object_initializer_name(),
3477 vmSymbols::void_method_signature()));
3478 }
3479
3480 if (curr_klass == init_klass && !m->is_public()) {
3481 // Calling the constructor for class 'curr_klass'.
3482 // Only allow calls to a public no-arg constructor.
3483 // This path corresponds to creating an Externalizable object.
3484 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3485 }
3486
3487 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3488 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3489 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3490 }
3491
3492 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3493 // Call constructor m. This might call a constructor higher up in the hierachy
3494 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3495
3496 return JNIHandles::make_local(obj());
3497 JVM_END
3498
3499
3500 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3501 JVMWrapper("JVM_AllocateNewArray");
3502 JvmtiVMObjectAllocEventCollector oam;
3503 oop mirror = JNIHandles::resolve_non_null(currClass);
3504
3505 if (java_lang_Class::is_primitive(mirror)) {
3506 THROW_0(vmSymbols::java_lang_InvalidClassException());
3507 }
3508 Klass* k = java_lang_Class::as_Klass(mirror);
3509 oop result;
3510
3511 if (k->oop_is_typeArray()) {
3512 // typeArray
3513 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3514 } else if (k->oop_is_objArray()) {
3515 // objArray
3516 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3517 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3518 result = oak->allocate(length, CHECK_NULL);
3519 } else {
3520 THROW_0(vmSymbols::java_lang_InvalidClassException());
3521 }
3522 return JNIHandles::make_local(env, result);
3523 JVM_END
3524
3525
3526 // Return the first non-null class loader up the execution stack, or null
3527 // if only code from the null class loader is on the stack.
3528
3529 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3530 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3531 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3532 oop loader = vfst.method()->method_holder()->class_loader();
3533 if (loader != NULL) {
3534 return JNIHandles::make_local(env, loader);
3535 }
3536 }
3537 return NULL;
3538 JVM_END
3539
3540
3541 // Load a class relative to the most recent class on the stack with a non-null
3542 // classloader.
3543 // This function has been deprecated and should not be considered part of the
3544 // specified JVM interface.
3545
3546 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3547 jclass currClass, jstring currClassName))
3548 JVMWrapper("JVM_LoadClass0");
3549 // Receiver is not used
3550 ResourceMark rm(THREAD);
3551
3552 // Class name argument is not guaranteed to be in internal format
3553 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3554 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3555
3556 const char* str = java_lang_String::as_utf8_string(string());
3557
3558 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3559 // It's impossible to create this class; the name cannot fit
3560 // into the constant pool.
3561 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3562 }
3563
3564 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3565 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3566 // Find the most recent class on the stack with a non-null classloader
3567 oop loader = NULL;
3568 oop protection_domain = NULL;
3569 if (curr_klass.is_null()) {
3570 for (vframeStream vfst(thread);
3571 !vfst.at_end() && loader == NULL;
3572 vfst.next()) {
3573 if (!vfst.method()->is_native()) {
3574 InstanceKlass* holder = vfst.method()->method_holder();
3575 loader = holder->class_loader();
3576 protection_domain = holder->protection_domain();
3577 }
3578 }
3579 } else {
3580 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3581 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3582 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3583 }
3584 Handle h_loader(THREAD, loader);
3585 Handle h_prot (THREAD, protection_domain);
3586 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3587 false, thread);
3588 if (TraceClassResolution && result != NULL) {
3589 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3590 }
3591 return result;
3592 JVM_END
3593
3594
3595 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3596
3597
3598 // resolve array handle and check arguments
3599 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3600 if (arr == NULL) {
3601 THROW_0(vmSymbols::java_lang_NullPointerException());
3602 }
3603 oop a = JNIHandles::resolve_non_null(arr);
3604 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3605 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3606 }
3607 return arrayOop(a);
3608 }
3609
3610
3611 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3612 JVMWrapper("JVM_GetArrayLength");
3613 arrayOop a = check_array(env, arr, false, CHECK_0);
3614 return a->length();
3615 JVM_END
3616
3617
3618 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3619 JVMWrapper("JVM_Array_Get");
3620 JvmtiVMObjectAllocEventCollector oam;
3621 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3622 jvalue value;
3623 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3624 oop box = Reflection::box(&value, type, CHECK_NULL);
3625 return JNIHandles::make_local(env, box);
3626 JVM_END
3627
3628
3629 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3630 JVMWrapper("JVM_GetPrimitiveArrayElement");
3631 jvalue value;
3632 value.i = 0; // to initialize value before getting used in CHECK
3633 arrayOop a = check_array(env, arr, true, CHECK_(value));
3634 assert(a->is_typeArray(), "just checking");
3635 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3636 BasicType wide_type = (BasicType) wCode;
3637 if (type != wide_type) {
3638 Reflection::widen(&value, type, wide_type, CHECK_(value));
3639 }
3640 return value;
3641 JVM_END
3642
3643
3644 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3645 JVMWrapper("JVM_SetArrayElement");
3646 arrayOop a = check_array(env, arr, false, CHECK);
3647 oop box = JNIHandles::resolve(val);
3648 jvalue value;
3649 value.i = 0; // to initialize value before getting used in CHECK
3650 BasicType value_type;
3651 if (a->is_objArray()) {
3652 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3653 value_type = Reflection::unbox_for_regular_object(box, &value);
3654 } else {
3655 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3656 }
3657 Reflection::array_set(&value, a, index, value_type, CHECK);
3658 JVM_END
3659
3660
3661 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3662 JVMWrapper("JVM_SetPrimitiveArrayElement");
3663 arrayOop a = check_array(env, arr, true, CHECK);
3664 assert(a->is_typeArray(), "just checking");
3665 BasicType value_type = (BasicType) vCode;
3666 Reflection::array_set(&v, a, index, value_type, CHECK);
3667 JVM_END
3668
3669
3670 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3671 JVMWrapper("JVM_NewArray");
3672 JvmtiVMObjectAllocEventCollector oam;
3673 oop element_mirror = JNIHandles::resolve(eltClass);
3674 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3675 return JNIHandles::make_local(env, result);
3676 JVM_END
3677
3678
3679 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3680 JVMWrapper("JVM_NewMultiArray");
3681 JvmtiVMObjectAllocEventCollector oam;
3682 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3683 oop element_mirror = JNIHandles::resolve(eltClass);
3684 assert(dim_array->is_typeArray(), "just checking");
3685 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3686 return JNIHandles::make_local(env, result);
3687 JVM_END
3688
3689
3690 // Networking library support ////////////////////////////////////////////////////////////////////
3691
3692 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3693 JVMWrapper("JVM_InitializeSocketLibrary");
3694 return 0;
3695 JVM_END
3696
3697
3698 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3699 JVMWrapper("JVM_Socket");
3700 return os::socket(domain, type, protocol);
3701 JVM_END
3702
3703
3704 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3705 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3706 //%note jvm_r6
3707 return os::socket_close(fd);
3708 JVM_END
3709
3710
3711 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3712 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3713 //%note jvm_r6
3714 return os::socket_shutdown(fd, howto);
3715 JVM_END
3716
3717
3718 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3719 JVMWrapper2("JVM_Recv (0x%x)", fd);
3720 //%note jvm_r6
3721 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3722 JVM_END
3723
3724
3725 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3726 JVMWrapper2("JVM_Send (0x%x)", fd);
3727 //%note jvm_r6
3728 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3729 JVM_END
3730
3731
3732 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3733 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3734 //%note jvm_r6
3735 return os::timeout(fd, timeout);
3736 JVM_END
3737
3738
3739 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3740 JVMWrapper2("JVM_Listen (0x%x)", fd);
3741 //%note jvm_r6
3742 return os::listen(fd, count);
3743 JVM_END
3744
3745
3746 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3747 JVMWrapper2("JVM_Connect (0x%x)", fd);
3748 //%note jvm_r6
3749 return os::connect(fd, him, (socklen_t)len);
3750 JVM_END
3751
3752
3753 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3754 JVMWrapper2("JVM_Bind (0x%x)", fd);
3755 //%note jvm_r6
3756 return os::bind(fd, him, (socklen_t)len);
3757 JVM_END
3758
3759
3760 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3761 JVMWrapper2("JVM_Accept (0x%x)", fd);
3762 //%note jvm_r6
3763 socklen_t socklen = (socklen_t)(*len);
3764 jint result = os::accept(fd, him, &socklen);
3765 *len = (jint)socklen;
3766 return result;
3767 JVM_END
3768
3769
3770 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3771 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3772 //%note jvm_r6
3773 socklen_t socklen = (socklen_t)(*fromlen);
3774 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3775 *fromlen = (int)socklen;
3776 return result;
3777 JVM_END
3778
3779
3780 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3781 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3782 //%note jvm_r6
3783 socklen_t socklen = (socklen_t)(*len);
3784 jint result = os::get_sock_name(fd, him, &socklen);
3785 *len = (int)socklen;
3786 return result;
3787 JVM_END
3788
3789
3790 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3791 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3792 //%note jvm_r6
3793 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3794 JVM_END
3795
3796
3797 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3798 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3799 //%note jvm_r6
3800 return os::socket_available(fd, pbytes);
3801 JVM_END
3802
3803
3804 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3805 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3806 //%note jvm_r6
3807 socklen_t socklen = (socklen_t)(*optlen);
3808 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3809 *optlen = (int)socklen;
3810 return result;
3811 JVM_END
3812
3813
3814 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3815 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3816 //%note jvm_r6
3817 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3818 JVM_END
3819
3820
3821 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3822 JVMWrapper("JVM_GetHostName");
3823 return os::get_host_name(name, namelen);
3824 JVM_END
3825
3826
3827 // Library support ///////////////////////////////////////////////////////////////////////////
3828
3829 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3830 //%note jvm_ct
3831 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3832 char ebuf[1024];
3833 void *load_result;
3834 {
3835 ThreadToNativeFromVM ttnfvm(thread);
3836 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3837 }
3838 if (load_result == NULL) {
3839 char msg[1024];
3840 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3841 // Since 'ebuf' may contain a string encoded using
3842 // platform encoding scheme, we need to pass
3843 // Exceptions::unsafe_to_utf8 to the new_exception method
3844 // as the last argument. See bug 6367357.
3845 Handle h_exception =
3846 Exceptions::new_exception(thread,
3847 vmSymbols::java_lang_UnsatisfiedLinkError(),
3848 msg, Exceptions::unsafe_to_utf8);
3849
3850 THROW_HANDLE_0(h_exception);
3851 }
3852 return load_result;
3853 JVM_END
3854
3855
3856 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3857 JVMWrapper("JVM_UnloadLibrary");
3858 os::dll_unload(handle);
3859 JVM_END
3860
3861
3862 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3863 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3864 return os::dll_lookup(handle, name);
3865 JVM_END
3866
3867
3868 // Floating point support ////////////////////////////////////////////////////////////////////
3869
3870 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3871 JVMWrapper("JVM_IsNaN");
3872 return g_isnan(a);
3873 JVM_END
3874
3875
3876 // JNI version ///////////////////////////////////////////////////////////////////////////////
3877
3878 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3879 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3880 return Threads::is_supported_jni_version_including_1_1(version);
3881 JVM_END
3882
3883
3884 // String support ///////////////////////////////////////////////////////////////////////////
3885
3886 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3887 JVMWrapper("JVM_InternString");
3888 JvmtiVMObjectAllocEventCollector oam;
3889 if (str == NULL) return NULL;
3890 oop string = JNIHandles::resolve_non_null(str);
3891 oop result = StringTable::intern(string, CHECK_NULL);
3892 return (jstring) JNIHandles::make_local(env, result);
3893 JVM_END
3894
3895
3896 // Raw monitor support //////////////////////////////////////////////////////////////////////
3897
3898 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3899 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3900 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3901 // that only works with java threads.
3902
3903
3904 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3905 VM_Exit::block_if_vm_exited();
3906 JVMWrapper("JVM_RawMonitorCreate");
3907 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3908 }
3909
3910
3911 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3912 VM_Exit::block_if_vm_exited();
3913 JVMWrapper("JVM_RawMonitorDestroy");
3914 delete ((Mutex*) mon);
3915 }
3916
3917
3918 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3919 VM_Exit::block_if_vm_exited();
3920 JVMWrapper("JVM_RawMonitorEnter");
3921 ((Mutex*) mon)->jvm_raw_lock();
3922 return 0;
3923 }
3924
3925
3926 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3927 VM_Exit::block_if_vm_exited();
3928 JVMWrapper("JVM_RawMonitorExit");
3929 ((Mutex*) mon)->jvm_raw_unlock();
3930 }
3931
3932
3933 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3934
3935 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3936 // Security Note:
3937 // The Java level wrapper will perform the necessary security check allowing
3938 // us to pass the NULL as the initiating class loader.
3939 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3940
3941 KlassHandle klass_handle(THREAD, klass);
3942 // Check if we should initialize the class
3943 if (init && klass_handle->oop_is_instance()) {
3944 klass_handle->initialize(CHECK_NULL);
3945 }
3946 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3947 }
3948
3949
3950 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3951
3952 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3953 JVMWrapper("JVM_InvokeMethod");
3954 Handle method_handle;
3955 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3956 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3957 Handle receiver(THREAD, JNIHandles::resolve(obj));
3958 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3959 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3960 jobject res = JNIHandles::make_local(env, result);
3961 if (JvmtiExport::should_post_vm_object_alloc()) {
3962 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3963 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3964 if (java_lang_Class::is_primitive(ret_type)) {
3965 // Only for primitive type vm allocates memory for java object.
3966 // See box() method.
3967 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3968 }
3969 }
3970 return res;
3971 } else {
3972 THROW_0(vmSymbols::java_lang_StackOverflowError());
3973 }
3974 JVM_END
3975
3976
3977 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3978 JVMWrapper("JVM_NewInstanceFromConstructor");
3979 oop constructor_mirror = JNIHandles::resolve(c);
3980 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3981 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3982 jobject res = JNIHandles::make_local(env, result);
3983 if (JvmtiExport::should_post_vm_object_alloc()) {
3984 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3985 }
3986 return res;
3987 JVM_END
3988
3989 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3990
3991 JVM_LEAF(jboolean, JVM_SupportsCX8())
3992 JVMWrapper("JVM_SupportsCX8");
3993 return VM_Version::supports_cx8();
3994 JVM_END
3995
3996
3997 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
3998 JVMWrapper("JVM_CX8Field");
3999 jlong res;
4000 oop o = JNIHandles::resolve(obj);
4001 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4002 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4003
4004 assert(VM_Version::supports_cx8(), "cx8 not supported");
4005 res = Atomic::cmpxchg(newVal, addr, oldVal);
4006
4007 return res == oldVal;
4008 JVM_END
4009
4010 // DTrace ///////////////////////////////////////////////////////////////////
4011
4012 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4013 JVMWrapper("JVM_DTraceGetVersion");
4014 return (jint)JVM_TRACING_DTRACE_VERSION;
4015 JVM_END
4016
4017 JVM_ENTRY(jlong,JVM_DTraceActivate(
4018 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4019 JVM_DTraceProvider* providers))
4020 JVMWrapper("JVM_DTraceActivate");
4021 return DTraceJSDT::activate(
4022 version, module_name, providers_count, providers, CHECK_0);
4023 JVM_END
4024
4025 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4026 JVMWrapper("JVM_DTraceIsProbeEnabled");
4027 return DTraceJSDT::is_probe_enabled(method);
4028 JVM_END
4029
4030 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4031 JVMWrapper("JVM_DTraceDispose");
4032 DTraceJSDT::dispose(handle);
4033 JVM_END
4034
4035 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4036 JVMWrapper("JVM_DTraceIsSupported");
4037 return DTraceJSDT::is_supported();
4038 JVM_END
4039
4040 // Returns an array of all live Thread objects (VM internal JavaThreads,
4041 // jvmti agent threads, and JNI attaching threads are skipped)
4042 // See CR 6404306 regarding JNI attaching threads
4043 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4044 ResourceMark rm(THREAD);
4045 ThreadsListEnumerator tle(THREAD, false, false);
4046 JvmtiVMObjectAllocEventCollector oam;
4047
4048 int num_threads = tle.num_threads();
4049 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4050 objArrayHandle threads_ah(THREAD, r);
4051
4052 for (int i = 0; i < num_threads; i++) {
4053 Handle h = tle.get_threadObj(i);
4054 threads_ah->obj_at_put(i, h());
4055 }
4056
4057 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4058 JVM_END
4059
4060
4061 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4062 // Return StackTraceElement[][], each element is the stack trace of a thread in
4063 // the corresponding entry in the given threads array
4064 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4065 JVMWrapper("JVM_DumpThreads");
4066 JvmtiVMObjectAllocEventCollector oam;
4067
4068 // Check if threads is null
4069 if (threads == NULL) {
4070 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4071 }
4072
4073 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4074 objArrayHandle ah(THREAD, a);
4075 int num_threads = ah->length();
4076 // check if threads is non-empty array
4077 if (num_threads == 0) {
4078 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4079 }
4080
4081 // check if threads is not an array of objects of Thread class
4082 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4083 if (k != SystemDictionary::Thread_klass()) {
4084 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4085 }
4086
4087 ResourceMark rm(THREAD);
4088
4089 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4090 for (int i = 0; i < num_threads; i++) {
4091 oop thread_obj = ah->obj_at(i);
4092 instanceHandle h(THREAD, (instanceOop) thread_obj);
4093 thread_handle_array->append(h);
4094 }
4095
4096 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4097 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4098
4099 JVM_END
4100
4101 // JVM monitoring and management support
4102 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4103 return Management::get_jmm_interface(version);
4104 JVM_END
4105
4106 // com.sun.tools.attach.VirtualMachine agent properties support
4107 //
4108 // Initialize the agent properties with the properties maintained in the VM
4109 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4110 JVMWrapper("JVM_InitAgentProperties");
4111 ResourceMark rm;
4112
4113 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4114
4115 PUTPROP(props, "sun.java.command", Arguments::java_command());
4116 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4117 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4118 return properties;
4119 JVM_END
4120
4121 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4122 {
4123 JVMWrapper("JVM_GetEnclosingMethodInfo");
4124 JvmtiVMObjectAllocEventCollector oam;
4125
4126 if (ofClass == NULL) {
4127 return NULL;
4128 }
4129 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4130 // Special handling for primitive objects
4131 if (java_lang_Class::is_primitive(mirror())) {
4132 return NULL;
4133 }
4134 Klass* k = java_lang_Class::as_Klass(mirror());
4135 if (!k->oop_is_instance()) {
4136 return NULL;
4137 }
4138 instanceKlassHandle ik_h(THREAD, k);
4139 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4140 if (encl_method_class_idx == 0) {
4141 return NULL;
4142 }
4143 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4144 objArrayHandle dest(THREAD, dest_o);
4145 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4146 dest->obj_at_put(0, enc_k->java_mirror());
4147 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4148 if (encl_method_method_idx != 0) {
4149 Symbol* sym = ik_h->constants()->symbol_at(
4150 extract_low_short_from_int(
4151 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4152 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4153 dest->obj_at_put(1, str());
4154 sym = ik_h->constants()->symbol_at(
4155 extract_high_short_from_int(
4156 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4157 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4158 dest->obj_at_put(2, str());
4159 }
4160 return (jobjectArray) JNIHandles::make_local(dest());
4161 }
4162 JVM_END
4163
4164 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4165 jint javaThreadState))
4166 {
4167 // If new thread states are added in future JDK and VM versions,
4168 // this should check if the JDK version is compatible with thread
4169 // states supported by the VM. Return NULL if not compatible.
4170 //
4171 // This function must map the VM java_lang_Thread::ThreadStatus
4172 // to the Java thread state that the JDK supports.
4173 //
4174
4175 typeArrayHandle values_h;
4176 switch (javaThreadState) {
4177 case JAVA_THREAD_STATE_NEW : {
4178 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4179 values_h = typeArrayHandle(THREAD, r);
4180 values_h->int_at_put(0, java_lang_Thread::NEW);
4181 break;
4182 }
4183 case JAVA_THREAD_STATE_RUNNABLE : {
4184 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4185 values_h = typeArrayHandle(THREAD, r);
4186 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4187 break;
4188 }
4189 case JAVA_THREAD_STATE_BLOCKED : {
4190 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4191 values_h = typeArrayHandle(THREAD, r);
4192 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4193 break;
4194 }
4195 case JAVA_THREAD_STATE_WAITING : {
4196 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4197 values_h = typeArrayHandle(THREAD, r);
4198 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4199 values_h->int_at_put(1, java_lang_Thread::PARKED);
4200 break;
4201 }
4202 case JAVA_THREAD_STATE_TIMED_WAITING : {
4203 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4204 values_h = typeArrayHandle(THREAD, r);
4205 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4206 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4207 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4208 break;
4209 }
4210 case JAVA_THREAD_STATE_TERMINATED : {
4211 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4212 values_h = typeArrayHandle(THREAD, r);
4213 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4214 break;
4215 }
4216 default:
4217 // Unknown state - probably incompatible JDK version
4218 return NULL;
4219 }
4220
4221 return (jintArray) JNIHandles::make_local(env, values_h());
4222 }
4223 JVM_END
4224
4225
4226 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4227 jint javaThreadState,
4228 jintArray values))
4229 {
4230 // If new thread states are added in future JDK and VM versions,
4231 // this should check if the JDK version is compatible with thread
4232 // states supported by the VM. Return NULL if not compatible.
4233 //
4234 // This function must map the VM java_lang_Thread::ThreadStatus
4235 // to the Java thread state that the JDK supports.
4236 //
4237
4238 ResourceMark rm;
4239
4240 // Check if threads is null
4241 if (values == NULL) {
4242 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4243 }
4244
4245 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4246 typeArrayHandle values_h(THREAD, v);
4247
4248 objArrayHandle names_h;
4249 switch (javaThreadState) {
4250 case JAVA_THREAD_STATE_NEW : {
4251 assert(values_h->length() == 1 &&
4252 values_h->int_at(0) == java_lang_Thread::NEW,
4253 "Invalid threadStatus value");
4254
4255 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4256 1, /* only 1 substate */
4257 CHECK_NULL);
4258 names_h = objArrayHandle(THREAD, r);
4259 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4260 names_h->obj_at_put(0, name());
4261 break;
4262 }
4263 case JAVA_THREAD_STATE_RUNNABLE : {
4264 assert(values_h->length() == 1 &&
4265 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4266 "Invalid threadStatus value");
4267
4268 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4269 1, /* only 1 substate */
4270 CHECK_NULL);
4271 names_h = objArrayHandle(THREAD, r);
4272 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4273 names_h->obj_at_put(0, name());
4274 break;
4275 }
4276 case JAVA_THREAD_STATE_BLOCKED : {
4277 assert(values_h->length() == 1 &&
4278 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4279 "Invalid threadStatus value");
4280
4281 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4282 1, /* only 1 substate */
4283 CHECK_NULL);
4284 names_h = objArrayHandle(THREAD, r);
4285 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4286 names_h->obj_at_put(0, name());
4287 break;
4288 }
4289 case JAVA_THREAD_STATE_WAITING : {
4290 assert(values_h->length() == 2 &&
4291 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4292 values_h->int_at(1) == java_lang_Thread::PARKED,
4293 "Invalid threadStatus value");
4294 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4295 2, /* number of substates */
4296 CHECK_NULL);
4297 names_h = objArrayHandle(THREAD, r);
4298 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4299 CHECK_NULL);
4300 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4301 CHECK_NULL);
4302 names_h->obj_at_put(0, name0());
4303 names_h->obj_at_put(1, name1());
4304 break;
4305 }
4306 case JAVA_THREAD_STATE_TIMED_WAITING : {
4307 assert(values_h->length() == 3 &&
4308 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4309 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4310 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4311 "Invalid threadStatus value");
4312 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4313 3, /* number of substates */
4314 CHECK_NULL);
4315 names_h = objArrayHandle(THREAD, r);
4316 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4317 CHECK_NULL);
4318 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4319 CHECK_NULL);
4320 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4321 CHECK_NULL);
4322 names_h->obj_at_put(0, name0());
4323 names_h->obj_at_put(1, name1());
4324 names_h->obj_at_put(2, name2());
4325 break;
4326 }
4327 case JAVA_THREAD_STATE_TERMINATED : {
4328 assert(values_h->length() == 1 &&
4329 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4330 "Invalid threadStatus value");
4331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4332 1, /* only 1 substate */
4333 CHECK_NULL);
4334 names_h = objArrayHandle(THREAD, r);
4335 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4336 names_h->obj_at_put(0, name());
4337 break;
4338 }
4339 default:
4340 // Unknown state - probably incompatible JDK version
4341 return NULL;
4342 }
4343 return (jobjectArray) JNIHandles::make_local(env, names_h());
4344 }
4345 JVM_END
4346
4347 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4348 {
4349 memset(info, 0, info_size);
4350
4351 info->jvm_version = Abstract_VM_Version::jvm_version();
4352 info->update_version = 0; /* 0 in HotSpot Express VM */
4353 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4354
4355 // when we add a new capability in the jvm_version_info struct, we should also
4356 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4357 // counter defined in runtimeService.cpp.
4358 info->is_attachable = AttachListener::is_attach_supported();
4359 }
4360 JVM_END