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_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1077 JVMWrapper("JVM_IsInterface");
1078 oop mirror = JNIHandles::resolve_non_null(cls);
1079 if (java_lang_Class::is_primitive(mirror)) {
1080 return JNI_FALSE;
1081 }
1082 Klass* k = java_lang_Class::as_Klass(mirror);
1083 jboolean result = k->is_interface();
1084 assert(!result || k->oop_is_instance(),
1085 "all interfaces are instance types");
1086 // The compiler intrinsic for isInterface tests the
1087 // Klass::_access_flags bits in the same way.
1088 return result;
1089 JVM_END
1090
1091
1092 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1093 JVMWrapper("JVM_GetClassSigners");
1094 JvmtiVMObjectAllocEventCollector oam;
1095 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096 // There are no signers for primitive types
1097 return NULL;
1098 }
1099
1100 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1101
1102 // If there are no signers set in the class, or if the class
1103 // is an array, return NULL.
1104 if (signers == NULL) return NULL;
1105
1106 // copy of the signers array
1107 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1108 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1109 for (int index = 0; index < signers->length(); index++) {
1110 signers_copy->obj_at_put(index, signers->obj_at(index));
1111 }
1112
1113 // return the copy
1114 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1115 JVM_END
1116
1117
1118 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1119 JVMWrapper("JVM_SetClassSigners");
1120 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1121 // This call is ignored for primitive types and arrays.
1122 // Signers are only set once, ClassLoader.java, and thus shouldn't
1123 // be called with an array. Only the bootstrap loader creates arrays.
1124 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1125 if (k->oop_is_instance()) {
1126 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1127 }
1128 }
1129 JVM_END
1130
1131
1132 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1133 JVMWrapper("JVM_GetProtectionDomain");
1134 if (JNIHandles::resolve(cls) == NULL) {
1135 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1136 }
1137
1138 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1139 // Primitive types does not have a protection domain.
1140 return NULL;
1141 }
1142
1143 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1144 return (jobject) JNIHandles::make_local(env, pd);
1145 JVM_END
1146
1147
1148 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1149 // If there is a security manager and protection domain, check the access
1150 // in the protection domain, otherwise it is authorized.
1151 if (java_lang_System::has_security_manager()) {
1152
1153 // For bootstrapping, if pd implies method isn't in the JDK, allow
1154 // this context to revert to older behavior.
1155 // In this case the isAuthorized field in AccessControlContext is also not
1156 // present.
1157 if (Universe::protection_domain_implies_method() == NULL) {
1158 return true;
1159 }
1160
1161 // Whitelist certain access control contexts
1162 if (java_security_AccessControlContext::is_authorized(context)) {
1163 return true;
1164 }
1165
1166 oop prot = klass->protection_domain();
1167 if (prot != NULL) {
1168 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1169 // in the new wrapper.
1170 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1171 Handle h_prot(THREAD, prot);
1172 JavaValue result(T_BOOLEAN);
1173 JavaCallArguments args(h_prot);
1174 JavaCalls::call(&result, m, &args, CHECK_false);
1175 return (result.get_jboolean() != 0);
1176 }
1177 }
1178 return true;
1179 }
1180
1181 // Create an AccessControlContext with a protection domain with null codesource
1182 // and null permissions - which gives no permissions.
1183 oop create_dummy_access_control_context(TRAPS) {
1184 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1185 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1186 // Call constructor ProtectionDomain(null, null);
1187 JavaValue result(T_VOID);
1188 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1189 vmSymbols::object_initializer_name(),
1190 vmSymbols::codesource_permissioncollection_signature(),
1191 Handle(), Handle(), CHECK_NULL);
1192
1193 // new ProtectionDomain[] {pd};
1194 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1195 context->obj_at_put(0, obj());
1196
1197 // new AccessControlContext(new ProtectionDomain[] {pd})
1198 objArrayHandle h_context(THREAD, context);
1199 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1200 return acc;
1201 }
1202
1203 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1204 JVMWrapper("JVM_DoPrivileged");
1205
1206 if (action == NULL) {
1207 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1208 }
1209
1210 // Compute the frame initiating the do privileged operation and setup the privileged stack
1211 vframeStream vfst(thread);
1212 vfst.security_get_caller_frame(1);
1213
1214 if (vfst.at_end()) {
1215 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1216 }
1217
1218 Method* method = vfst.method();
1219 instanceKlassHandle klass (THREAD, method->method_holder());
1220
1221 // Check that action object understands "Object run()"
1222 Handle h_context;
1223 if (context != NULL) {
1224 h_context = Handle(THREAD, JNIHandles::resolve(context));
1225 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1226 if (!authorized) {
1227 // Create an unprivileged access control object and call it's run function
1228 // instead.
1229 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1230 h_context = Handle(THREAD, noprivs);
1231 }
1232 }
1233
1234 // Check that action object understands "Object run()"
1235 Handle object (THREAD, JNIHandles::resolve(action));
1236
1237 // get run() method
1238 Method* m_oop = object->klass()->uncached_lookup_method(
1239 vmSymbols::run_method_name(),
1240 vmSymbols::void_object_signature(),
1241 Klass::normal);
1242 methodHandle m (THREAD, m_oop);
1243 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1244 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1245 }
1246
1247 // Stack allocated list of privileged stack elements
1248 PrivilegedElement pi;
1249 if (!vfst.at_end()) {
1250 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1251 thread->set_privileged_stack_top(&pi);
1252 }
1253
1254
1255 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1256 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1257 Handle pending_exception;
1258 JavaValue result(T_OBJECT);
1259 JavaCallArguments args(object);
1260 JavaCalls::call(&result, m, &args, THREAD);
1261
1262 // done with action, remove ourselves from the list
1263 if (!vfst.at_end()) {
1264 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1265 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1266 }
1267
1268 if (HAS_PENDING_EXCEPTION) {
1269 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1270 CLEAR_PENDING_EXCEPTION;
1271 // JVMTI has already reported the pending exception
1272 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1273 if (THREAD->is_Java_thread()) {
1274 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1275 }
1276 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1277 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1278 // Throw a java.security.PrivilegedActionException(Exception e) exception
1279 JavaCallArguments args(pending_exception);
1280 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1281 vmSymbols::exception_void_signature(),
1282 &args);
1283 }
1284 }
1285
1286 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1287 return JNIHandles::make_local(env, (oop) result.get_jobject());
1288 JVM_END
1289
1290
1291 // Returns the inherited_access_control_context field of the running thread.
1292 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1293 JVMWrapper("JVM_GetInheritedAccessControlContext");
1294 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1295 return JNIHandles::make_local(env, result);
1296 JVM_END
1297
1298 class RegisterArrayForGC {
1299 private:
1300 JavaThread *_thread;
1301 public:
1302 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1303 _thread = thread;
1304 _thread->register_array_for_gc(array);
1305 }
1306
1307 ~RegisterArrayForGC() {
1308 _thread->register_array_for_gc(NULL);
1309 }
1310 };
1311
1312
1313 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1314 JVMWrapper("JVM_GetStackAccessControlContext");
1315 if (!UsePrivilegedStack) return NULL;
1316
1317 ResourceMark rm(THREAD);
1318 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1319 JvmtiVMObjectAllocEventCollector oam;
1320
1321 // count the protection domains on the execution stack. We collapse
1322 // duplicate consecutive protection domains into a single one, as
1323 // well as stopping when we hit a privileged frame.
1324
1325 // Use vframeStream to iterate through Java frames
1326 vframeStream vfst(thread);
1327
1328 oop previous_protection_domain = NULL;
1329 Handle privileged_context(thread, NULL);
1330 bool is_privileged = false;
1331 oop protection_domain = NULL;
1332
1333 for(; !vfst.at_end(); vfst.next()) {
1334 // get method of frame
1335 Method* method = vfst.method();
1336 intptr_t* frame_id = vfst.frame_id();
1337
1338 // check the privileged frames to see if we have a match
1339 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1340 // this frame is privileged
1341 is_privileged = true;
1342 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1343 protection_domain = thread->privileged_stack_top()->protection_domain();
1344 } else {
1345 protection_domain = method->method_holder()->protection_domain();
1346 }
1347
1348 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1349 local_array->push(protection_domain);
1350 previous_protection_domain = protection_domain;
1351 }
1352
1353 if (is_privileged) break;
1354 }
1355
1356
1357 // either all the domains on the stack were system domains, or
1358 // we had a privileged system domain
1359 if (local_array->is_empty()) {
1360 if (is_privileged && privileged_context.is_null()) return NULL;
1361
1362 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1363 return JNIHandles::make_local(env, result);
1364 }
1365
1366 // the resource area must be registered in case of a gc
1367 RegisterArrayForGC ragc(thread, local_array);
1368 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1369 local_array->length(), CHECK_NULL);
1370 objArrayHandle h_context(thread, context);
1371 for (int index = 0; index < local_array->length(); index++) {
1372 h_context->obj_at_put(index, local_array->at(index));
1373 }
1374
1375 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1376
1377 return JNIHandles::make_local(env, result);
1378 JVM_END
1379
1380
1381 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1382 JVMWrapper("JVM_IsArrayClass");
1383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1384 return (k != NULL) && k->oop_is_array() ? true : false;
1385 JVM_END
1386
1387
1388 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1389 JVMWrapper("JVM_IsPrimitiveClass");
1390 oop mirror = JNIHandles::resolve_non_null(cls);
1391 return (jboolean) java_lang_Class::is_primitive(mirror);
1392 JVM_END
1393
1394
1395 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1396 JVMWrapper("JVM_GetClassModifiers");
1397 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1398 // Primitive type
1399 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1400 }
1401
1402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1403 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1404 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1405 return k->modifier_flags();
1406 JVM_END
1407
1408
1409 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1410
1411 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1412 JvmtiVMObjectAllocEventCollector oam;
1413 // ofClass is a reference to a java_lang_Class object. The mirror object
1414 // of an InstanceKlass
1415
1416 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1417 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1418 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1419 return (jobjectArray)JNIHandles::make_local(env, result);
1420 }
1421
1422 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1423 InnerClassesIterator iter(k);
1424
1425 if (iter.length() == 0) {
1426 // Neither an inner nor outer class
1427 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1428 return (jobjectArray)JNIHandles::make_local(env, result);
1429 }
1430
1431 // find inner class info
1432 constantPoolHandle cp(thread, k->constants());
1433 int length = iter.length();
1434
1435 // Allocate temp. result array
1436 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1437 objArrayHandle result (THREAD, r);
1438 int members = 0;
1439
1440 for (; !iter.done(); iter.next()) {
1441 int ioff = iter.inner_class_info_index();
1442 int ooff = iter.outer_class_info_index();
1443
1444 if (ioff != 0 && ooff != 0) {
1445 // Check to see if the name matches the class we're looking for
1446 // before attempting to find the class.
1447 if (cp->klass_name_at_matches(k, ooff)) {
1448 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1449 if (outer_klass == k()) {
1450 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1451 instanceKlassHandle inner_klass (THREAD, ik);
1452
1453 // Throws an exception if outer klass has not declared k as
1454 // an inner klass
1455 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1456
1457 result->obj_at_put(members, inner_klass->java_mirror());
1458 members++;
1459 }
1460 }
1461 }
1462 }
1463
1464 if (members != length) {
1465 // Return array of right length
1466 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1467 for(int i = 0; i < members; i++) {
1468 res->obj_at_put(i, result->obj_at(i));
1469 }
1470 return (jobjectArray)JNIHandles::make_local(env, res);
1471 }
1472
1473 return (jobjectArray)JNIHandles::make_local(env, result());
1474 JVM_END
1475
1476
1477 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1478 {
1479 // ofClass is a reference to a java_lang_Class object.
1480 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1481 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1482 return NULL;
1483 }
1484
1485 bool inner_is_member = false;
1486 Klass* outer_klass
1487 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1488 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1489 if (outer_klass == NULL) return NULL; // already a top-level class
1490 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1491 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1492 }
1493 JVM_END
1494
1495 // should be in InstanceKlass.cpp, but is here for historical reasons
1496 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1497 bool* inner_is_member,
1498 TRAPS) {
1499 Thread* thread = THREAD;
1500 InnerClassesIterator iter(k);
1501 if (iter.length() == 0) {
1502 // No inner class info => no declaring class
1503 return NULL;
1504 }
1505
1506 constantPoolHandle i_cp(thread, k->constants());
1507
1508 bool found = false;
1509 Klass* ok;
1510 instanceKlassHandle outer_klass;
1511 *inner_is_member = false;
1512
1513 // Find inner_klass attribute
1514 for (; !iter.done() && !found; iter.next()) {
1515 int ioff = iter.inner_class_info_index();
1516 int ooff = iter.outer_class_info_index();
1517 int noff = iter.inner_name_index();
1518 if (ioff != 0) {
1519 // Check to see if the name matches the class we're looking for
1520 // before attempting to find the class.
1521 if (i_cp->klass_name_at_matches(k, ioff)) {
1522 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1523 found = (k() == inner_klass);
1524 if (found && ooff != 0) {
1525 ok = i_cp->klass_at(ooff, CHECK_NULL);
1526 outer_klass = instanceKlassHandle(thread, ok);
1527 *inner_is_member = true;
1528 }
1529 }
1530 }
1531 }
1532
1533 if (found && outer_klass.is_null()) {
1534 // It may be anonymous; try for that.
1535 int encl_method_class_idx = k->enclosing_method_class_index();
1536 if (encl_method_class_idx != 0) {
1537 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1538 outer_klass = instanceKlassHandle(thread, ok);
1539 *inner_is_member = false;
1540 }
1541 }
1542
1543 // If no inner class attribute found for this class.
1544 if (outer_klass.is_null()) return NULL;
1545
1546 // Throws an exception if outer klass has not declared k as an inner klass
1547 // We need evidence that each klass knows about the other, or else
1548 // the system could allow a spoof of an inner class to gain access rights.
1549 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1550 return outer_klass();
1551 }
1552
1553 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1554 assert (cls != NULL, "illegal class");
1555 JVMWrapper("JVM_GetClassSignature");
1556 JvmtiVMObjectAllocEventCollector oam;
1557 ResourceMark rm(THREAD);
1558 // Return null for arrays and primatives
1559 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1561 if (k->oop_is_instance()) {
1562 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1563 if (sym == NULL) return NULL;
1564 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1565 return (jstring) JNIHandles::make_local(env, str());
1566 }
1567 }
1568 return NULL;
1569 JVM_END
1570
1571
1572 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1573 assert (cls != NULL, "illegal class");
1574 JVMWrapper("JVM_GetClassAnnotations");
1575
1576 // Return null for arrays and primitives
1577 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1579 if (k->oop_is_instance()) {
1580 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1581 return (jbyteArray) JNIHandles::make_local(env, a);
1582 }
1583 }
1584 return NULL;
1585 JVM_END
1586
1587
1588 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1589 // some of this code was adapted from from jni_FromReflectedField
1590
1591 oop reflected = JNIHandles::resolve_non_null(field);
1592 oop mirror = java_lang_reflect_Field::clazz(reflected);
1593 Klass* k = java_lang_Class::as_Klass(mirror);
1594 int slot = java_lang_reflect_Field::slot(reflected);
1595 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1596
1597 KlassHandle kh(THREAD, k);
1598 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1599
1600 if (modifiers & JVM_ACC_STATIC) {
1601 // for static fields we only look in the current class
1602 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1603 assert(false, "cannot find static field");
1604 return false;
1605 }
1606 } else {
1607 // for instance fields we start with the current class and work
1608 // our way up through the superclass chain
1609 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1610 assert(false, "cannot find instance field");
1611 return false;
1612 }
1613 }
1614 return true;
1615 }
1616
1617 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1618 // field is a handle to a java.lang.reflect.Field object
1619 assert(field != NULL, "illegal field");
1620 JVMWrapper("JVM_GetFieldAnnotations");
1621
1622 fieldDescriptor fd;
1623 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1624 if (!gotFd) {
1625 return NULL;
1626 }
1627
1628 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1629 JVM_END
1630
1631
1632 static Method* jvm_get_method_common(jobject method) {
1633 // some of this code was adapted from from jni_FromReflectedMethod
1634
1635 oop reflected = JNIHandles::resolve_non_null(method);
1636 oop mirror = NULL;
1637 int slot = 0;
1638
1639 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1640 mirror = java_lang_reflect_Constructor::clazz(reflected);
1641 slot = java_lang_reflect_Constructor::slot(reflected);
1642 } else {
1643 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1644 "wrong type");
1645 mirror = java_lang_reflect_Method::clazz(reflected);
1646 slot = java_lang_reflect_Method::slot(reflected);
1647 }
1648 Klass* k = java_lang_Class::as_Klass(mirror);
1649
1650 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1651 assert(m != NULL, "cannot find method");
1652 return m; // caller has to deal with NULL in product mode
1653 }
1654
1655
1656 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1657 JVMWrapper("JVM_GetMethodAnnotations");
1658
1659 // method is a handle to a java.lang.reflect.Method object
1660 Method* m = jvm_get_method_common(method);
1661 if (m == NULL) {
1662 return NULL;
1663 }
1664
1665 return (jbyteArray) JNIHandles::make_local(env,
1666 Annotations::make_java_array(m->annotations(), THREAD));
1667 JVM_END
1668
1669
1670 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1671 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1672
1673 // method is a handle to a java.lang.reflect.Method object
1674 Method* m = jvm_get_method_common(method);
1675 if (m == NULL) {
1676 return NULL;
1677 }
1678
1679 return (jbyteArray) JNIHandles::make_local(env,
1680 Annotations::make_java_array(m->annotation_default(), THREAD));
1681 JVM_END
1682
1683
1684 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1685 JVMWrapper("JVM_GetMethodParameterAnnotations");
1686
1687 // method is a handle to a java.lang.reflect.Method object
1688 Method* m = jvm_get_method_common(method);
1689 if (m == NULL) {
1690 return NULL;
1691 }
1692
1693 return (jbyteArray) JNIHandles::make_local(env,
1694 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1695 JVM_END
1696
1697 /* Type use annotations support (JDK 1.8) */
1698
1699 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1700 assert (cls != NULL, "illegal class");
1701 JVMWrapper("JVM_GetClassTypeAnnotations");
1702 ResourceMark rm(THREAD);
1703 // Return null for arrays and primitives
1704 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1705 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1706 if (k->oop_is_instance()) {
1707 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1708 if (type_annotations != NULL) {
1709 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1710 return (jbyteArray) JNIHandles::make_local(env, a);
1711 }
1712 }
1713 }
1714 return NULL;
1715 JVM_END
1716
1717 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1718 assert (method != NULL, "illegal method");
1719 JVMWrapper("JVM_GetMethodTypeAnnotations");
1720
1721 // method is a handle to a java.lang.reflect.Method object
1722 Method* m = jvm_get_method_common(method);
1723 if (m == NULL) {
1724 return NULL;
1725 }
1726
1727 AnnotationArray* type_annotations = m->type_annotations();
1728 if (type_annotations != NULL) {
1729 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1730 return (jbyteArray) JNIHandles::make_local(env, a);
1731 }
1732
1733 return NULL;
1734 JVM_END
1735
1736 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1737 assert (field != NULL, "illegal field");
1738 JVMWrapper("JVM_GetFieldTypeAnnotations");
1739
1740 fieldDescriptor fd;
1741 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1742 if (!gotFd) {
1743 return NULL;
1744 }
1745
1746 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1747 JVM_END
1748
1749 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1750 if (!cp->is_within_bounds(index)) {
1751 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1752 }
1753 }
1754
1755 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1756 {
1757 JVMWrapper("JVM_GetMethodParameters");
1758 // method is a handle to a java.lang.reflect.Method object
1759 Method* method_ptr = jvm_get_method_common(method);
1760 methodHandle mh (THREAD, method_ptr);
1761 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1762 const int num_params = mh->method_parameters_length();
1763
1764 if (0 != num_params) {
1765 // make sure all the symbols are properly formatted
1766 for (int i = 0; i < num_params; i++) {
1767 MethodParametersElement* params = mh->method_parameters_start();
1768 int index = params[i].name_cp_index;
1769 bounds_check(mh->constants(), index, CHECK_NULL);
1770
1771 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1772 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1773 "Wrong type at constant pool index");
1774 }
1775
1776 }
1777
1778 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1779 objArrayHandle result (THREAD, result_oop);
1780
1781 for (int i = 0; i < num_params; i++) {
1782 MethodParametersElement* params = mh->method_parameters_start();
1783 // For a 0 index, give a NULL symbol
1784 Symbol* sym = 0 != params[i].name_cp_index ?
1785 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1786 int flags = params[i].flags;
1787 oop param = Reflection::new_parameter(reflected_method, i, sym,
1788 flags, CHECK_NULL);
1789 result->obj_at_put(i, param);
1790 }
1791 return (jobjectArray)JNIHandles::make_local(env, result());
1792 } else {
1793 return (jobjectArray)NULL;
1794 }
1795 }
1796 JVM_END
1797
1798 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1799
1800 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1801 {
1802 JVMWrapper("JVM_GetClassDeclaredFields");
1803 JvmtiVMObjectAllocEventCollector oam;
1804
1805 // Exclude primitive types and array types
1806 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1807 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1808 // Return empty array
1809 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1810 return (jobjectArray) JNIHandles::make_local(env, res);
1811 }
1812
1813 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1814 constantPoolHandle cp(THREAD, k->constants());
1815
1816 // Ensure class is linked
1817 k->link_class(CHECK_NULL);
1818
1819 // 4496456 We need to filter out java.lang.Throwable.backtrace
1820 bool skip_backtrace = false;
1821
1822 // Allocate result
1823 int num_fields;
1824
1825 if (publicOnly) {
1826 num_fields = 0;
1827 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1828 if (fs.access_flags().is_public()) ++num_fields;
1829 }
1830 } else {
1831 num_fields = k->java_fields_count();
1832
1833 if (k() == SystemDictionary::Throwable_klass()) {
1834 num_fields--;
1835 skip_backtrace = true;
1836 }
1837 }
1838
1839 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1840 objArrayHandle result (THREAD, r);
1841
1842 int out_idx = 0;
1843 fieldDescriptor fd;
1844 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1845 if (skip_backtrace) {
1846 // 4496456 skip java.lang.Throwable.backtrace
1847 int offset = fs.offset();
1848 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1849 }
1850
1851 if (!publicOnly || fs.access_flags().is_public()) {
1852 fd.reinitialize(k(), fs.index());
1853 oop field = Reflection::new_field(&fd, CHECK_NULL);
1854 result->obj_at_put(out_idx, field);
1855 ++out_idx;
1856 }
1857 }
1858 assert(out_idx == num_fields, "just checking");
1859 return (jobjectArray) JNIHandles::make_local(env, result());
1860 }
1861 JVM_END
1862
1863 static bool select_method(methodHandle method, bool want_constructor) {
1864 if (want_constructor) {
1865 return (method->is_initializer() && !method->is_static());
1866 } else {
1867 return (!method->is_initializer() && !method->is_overpass());
1868 }
1869 }
1870
1871 static jobjectArray get_class_declared_methods_helper(
1872 JNIEnv *env,
1873 jclass ofClass, jboolean publicOnly,
1874 bool want_constructor,
1875 Klass* klass, TRAPS) {
1876
1877 JvmtiVMObjectAllocEventCollector oam;
1878
1879 // Exclude primitive types and array types
1880 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1881 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1882 // Return empty array
1883 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1884 return (jobjectArray) JNIHandles::make_local(env, res);
1885 }
1886
1887 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1888
1889 // Ensure class is linked
1890 k->link_class(CHECK_NULL);
1891
1892 Array<Method*>* methods = k->methods();
1893 int methods_length = methods->length();
1894
1895 // Save original method_idnum in case of redefinition, which can change
1896 // the idnum of obsolete methods. The new method will have the same idnum
1897 // but if we refresh the methods array, the counts will be wrong.
1898 ResourceMark rm(THREAD);
1899 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1900 int num_methods = 0;
1901
1902 for (int i = 0; i < methods_length; i++) {
1903 methodHandle method(THREAD, methods->at(i));
1904 if (select_method(method, want_constructor)) {
1905 if (!publicOnly || method->is_public()) {
1906 idnums->push(method->method_idnum());
1907 ++num_methods;
1908 }
1909 }
1910 }
1911
1912 // Allocate result
1913 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1914 objArrayHandle result (THREAD, r);
1915
1916 // Now just put the methods that we selected above, but go by their idnum
1917 // in case of redefinition. The methods can be redefined at any safepoint,
1918 // so above when allocating the oop array and below when creating reflect
1919 // objects.
1920 for (int i = 0; i < num_methods; i++) {
1921 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1922 if (method.is_null()) {
1923 // Method may have been deleted and seems this API can handle null
1924 // Otherwise should probably put a method that throws NSME
1925 result->obj_at_put(i, NULL);
1926 } else {
1927 oop m;
1928 if (want_constructor) {
1929 m = Reflection::new_constructor(method, CHECK_NULL);
1930 } else {
1931 m = Reflection::new_method(method, false, CHECK_NULL);
1932 }
1933 result->obj_at_put(i, m);
1934 }
1935 }
1936
1937 return (jobjectArray) JNIHandles::make_local(env, result());
1938 }
1939
1940 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1941 {
1942 JVMWrapper("JVM_GetClassDeclaredMethods");
1943 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1944 /*want_constructor*/ false,
1945 SystemDictionary::reflect_Method_klass(), THREAD);
1946 }
1947 JVM_END
1948
1949 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1950 {
1951 JVMWrapper("JVM_GetClassDeclaredConstructors");
1952 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1953 /*want_constructor*/ true,
1954 SystemDictionary::reflect_Constructor_klass(), THREAD);
1955 }
1956 JVM_END
1957
1958 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1959 {
1960 JVMWrapper("JVM_GetClassAccessFlags");
1961 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1962 // Primitive type
1963 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1964 }
1965
1966 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1967 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1968 }
1969 JVM_END
1970
1971
1972 // Constant pool access //////////////////////////////////////////////////////////
1973
1974 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1975 {
1976 JVMWrapper("JVM_GetClassConstantPool");
1977 JvmtiVMObjectAllocEventCollector oam;
1978
1979 // Return null for primitives and arrays
1980 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1981 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1982 if (k->oop_is_instance()) {
1983 instanceKlassHandle k_h(THREAD, k);
1984 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1985 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1986 return JNIHandles::make_local(jcp());
1987 }
1988 }
1989 return NULL;
1990 }
1991 JVM_END
1992
1993
1994 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1995 {
1996 JVMWrapper("JVM_ConstantPoolGetSize");
1997 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1998 return cp->length();
1999 }
2000 JVM_END
2001
2002
2003 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2004 {
2005 JVMWrapper("JVM_ConstantPoolGetClassAt");
2006 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2007 bounds_check(cp, index, CHECK_NULL);
2008 constantTag tag = cp->tag_at(index);
2009 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2010 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2011 }
2012 Klass* k = cp->klass_at(index, CHECK_NULL);
2013 return (jclass) JNIHandles::make_local(k->java_mirror());
2014 }
2015 JVM_END
2016
2017 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2018 {
2019 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2020 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2021 bounds_check(cp, index, CHECK_NULL);
2022 constantTag tag = cp->tag_at(index);
2023 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2025 }
2026 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2027 if (k == NULL) return NULL;
2028 return (jclass) JNIHandles::make_local(k->java_mirror());
2029 }
2030 JVM_END
2031
2032 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2033 constantTag tag = cp->tag_at(index);
2034 if (!tag.is_method() && !tag.is_interface_method()) {
2035 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2036 }
2037 int klass_ref = cp->uncached_klass_ref_index_at(index);
2038 Klass* k_o;
2039 if (force_resolution) {
2040 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2041 } else {
2042 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2043 if (k_o == NULL) return NULL;
2044 }
2045 instanceKlassHandle k(THREAD, k_o);
2046 Symbol* name = cp->uncached_name_ref_at(index);
2047 Symbol* sig = cp->uncached_signature_ref_at(index);
2048 methodHandle m (THREAD, k->find_method(name, sig));
2049 if (m.is_null()) {
2050 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2051 }
2052 oop method;
2053 if (!m->is_initializer() || m->is_static()) {
2054 method = Reflection::new_method(m, true, CHECK_NULL);
2055 } else {
2056 method = Reflection::new_constructor(m, CHECK_NULL);
2057 }
2058 return JNIHandles::make_local(method);
2059 }
2060
2061 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2062 {
2063 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2064 JvmtiVMObjectAllocEventCollector oam;
2065 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2066 bounds_check(cp, index, CHECK_NULL);
2067 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2068 return res;
2069 }
2070 JVM_END
2071
2072 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2073 {
2074 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
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, false, CHECK_NULL);
2079 return res;
2080 }
2081 JVM_END
2082
2083 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2084 constantTag tag = cp->tag_at(index);
2085 if (!tag.is_field()) {
2086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2087 }
2088 int klass_ref = cp->uncached_klass_ref_index_at(index);
2089 Klass* k_o;
2090 if (force_resolution) {
2091 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2092 } else {
2093 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2094 if (k_o == NULL) return NULL;
2095 }
2096 instanceKlassHandle k(THREAD, k_o);
2097 Symbol* name = cp->uncached_name_ref_at(index);
2098 Symbol* sig = cp->uncached_signature_ref_at(index);
2099 fieldDescriptor fd;
2100 Klass* target_klass = k->find_field(name, sig, &fd);
2101 if (target_klass == NULL) {
2102 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2103 }
2104 oop field = Reflection::new_field(&fd, CHECK_NULL);
2105 return JNIHandles::make_local(field);
2106 }
2107
2108 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2109 {
2110 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2111 JvmtiVMObjectAllocEventCollector oam;
2112 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113 bounds_check(cp, index, CHECK_NULL);
2114 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2115 return res;
2116 }
2117 JVM_END
2118
2119 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2120 {
2121 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
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, false, CHECK_NULL);
2126 return res;
2127 }
2128 JVM_END
2129
2130 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2131 {
2132 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
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 constantTag tag = cp->tag_at(index);
2137 if (!tag.is_field_or_method()) {
2138 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2139 }
2140 int klass_ref = cp->uncached_klass_ref_index_at(index);
2141 Symbol* klass_name = cp->klass_name_at(klass_ref);
2142 Symbol* member_name = cp->uncached_name_ref_at(index);
2143 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2144 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2145 objArrayHandle dest(THREAD, dest_o);
2146 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2147 dest->obj_at_put(0, str());
2148 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2149 dest->obj_at_put(1, str());
2150 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2151 dest->obj_at_put(2, str());
2152 return (jobjectArray) JNIHandles::make_local(dest());
2153 }
2154 JVM_END
2155
2156 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158 JVMWrapper("JVM_ConstantPoolGetIntAt");
2159 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2160 bounds_check(cp, index, CHECK_0);
2161 constantTag tag = cp->tag_at(index);
2162 if (!tag.is_int()) {
2163 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2164 }
2165 return cp->int_at(index);
2166 }
2167 JVM_END
2168
2169 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2170 {
2171 JVMWrapper("JVM_ConstantPoolGetLongAt");
2172 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2173 bounds_check(cp, index, CHECK_(0L));
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_long()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 return cp->long_at(index);
2179 }
2180 JVM_END
2181
2182 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2183 {
2184 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2185 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2186 bounds_check(cp, index, CHECK_(0.0f));
2187 constantTag tag = cp->tag_at(index);
2188 if (!tag.is_float()) {
2189 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2190 }
2191 return cp->float_at(index);
2192 }
2193 JVM_END
2194
2195 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2196 {
2197 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2198 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2199 bounds_check(cp, index, CHECK_(0.0));
2200 constantTag tag = cp->tag_at(index);
2201 if (!tag.is_double()) {
2202 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203 }
2204 return cp->double_at(index);
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2209 {
2210 JVMWrapper("JVM_ConstantPoolGetStringAt");
2211 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2212 bounds_check(cp, index, CHECK_NULL);
2213 constantTag tag = cp->tag_at(index);
2214 if (!tag.is_string()) {
2215 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2216 }
2217 oop str = cp->string_at(index, CHECK_NULL);
2218 return (jstring) JNIHandles::make_local(str);
2219 }
2220 JVM_END
2221
2222 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2223 {
2224 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2225 JvmtiVMObjectAllocEventCollector oam;
2226 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2227 bounds_check(cp, index, CHECK_NULL);
2228 constantTag tag = cp->tag_at(index);
2229 if (!tag.is_symbol()) {
2230 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2231 }
2232 Symbol* sym = cp->symbol_at(index);
2233 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2234 return (jstring) JNIHandles::make_local(str());
2235 }
2236 JVM_END
2237
2238
2239 // Assertion support. //////////////////////////////////////////////////////////
2240
2241 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2242 JVMWrapper("JVM_DesiredAssertionStatus");
2243 assert(cls != NULL, "bad class");
2244
2245 oop r = JNIHandles::resolve(cls);
2246 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2247 if (java_lang_Class::is_primitive(r)) return false;
2248
2249 Klass* k = java_lang_Class::as_Klass(r);
2250 assert(k->oop_is_instance(), "must be an instance klass");
2251 if (! k->oop_is_instance()) return false;
2252
2253 ResourceMark rm(THREAD);
2254 const char* name = k->name()->as_C_string();
2255 bool system_class = k->class_loader() == NULL;
2256 return JavaAssertions::enabled(name, system_class);
2257
2258 JVM_END
2259
2260
2261 // Return a new AssertionStatusDirectives object with the fields filled in with
2262 // command-line assertion arguments (i.e., -ea, -da).
2263 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2264 JVMWrapper("JVM_AssertionStatusDirectives");
2265 JvmtiVMObjectAllocEventCollector oam;
2266 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2267 return JNIHandles::make_local(env, asd);
2268 JVM_END
2269
2270 // Verification ////////////////////////////////////////////////////////////////////////////////
2271
2272 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2273
2274 // RedefineClasses support: bug 6214132 caused verification to fail.
2275 // All functions from this section should call the jvmtiThreadSate function:
2276 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2277 // The function returns a Klass* of the _scratch_class if the verifier
2278 // was invoked in the middle of the class redefinition.
2279 // Otherwise it returns its argument value which is the _the_class Klass*.
2280 // Please, refer to the description in the jvmtiThreadSate.hpp.
2281
2282 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2283 JVMWrapper("JVM_GetClassNameUTF");
2284 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2285 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2286 return k->name()->as_utf8();
2287 JVM_END
2288
2289
2290 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2291 JVMWrapper("JVM_GetClassCPTypes");
2292 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294 // types will have length zero if this is not an InstanceKlass
2295 // (length is determined by call to JVM_GetClassCPEntriesCount)
2296 if (k->oop_is_instance()) {
2297 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2298 for (int index = cp->length() - 1; index >= 0; index--) {
2299 constantTag tag = cp->tag_at(index);
2300 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2301 }
2302 }
2303 JVM_END
2304
2305
2306 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2307 JVMWrapper("JVM_GetClassCPEntriesCount");
2308 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2309 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310 if (!k->oop_is_instance())
2311 return 0;
2312 return InstanceKlass::cast(k)->constants()->length();
2313 JVM_END
2314
2315
2316 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2317 JVMWrapper("JVM_GetClassFieldsCount");
2318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 if (!k->oop_is_instance())
2321 return 0;
2322 return InstanceKlass::cast(k)->java_fields_count();
2323 JVM_END
2324
2325
2326 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2327 JVMWrapper("JVM_GetClassMethodsCount");
2328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2330 if (!k->oop_is_instance())
2331 return 0;
2332 return InstanceKlass::cast(k)->methods()->length();
2333 JVM_END
2334
2335
2336 // The following methods, used for the verifier, are never called with
2337 // array klasses, so a direct cast to InstanceKlass is safe.
2338 // Typically, these methods are called in a loop with bounds determined
2339 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2340 // zero for arrays.
2341 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2342 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2346 int length = method->checked_exceptions_length();
2347 if (length > 0) {
2348 CheckedExceptionElement* table= method->checked_exceptions_start();
2349 for (int i = 0; i < length; i++) {
2350 exceptions[i] = table[i].class_cp_index;
2351 }
2352 }
2353 JVM_END
2354
2355
2356 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2357 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2361 return method->checked_exceptions_length();
2362 JVM_END
2363
2364
2365 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2366 JVMWrapper("JVM_GetMethodIxByteCode");
2367 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2370 memcpy(code, method->code_base(), method->code_size());
2371 JVM_END
2372
2373
2374 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2375 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 return method->code_size();
2380 JVM_END
2381
2382
2383 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2384 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2388 ExceptionTable extable(method);
2389 entry->start_pc = extable.start_pc(entry_index);
2390 entry->end_pc = extable.end_pc(entry_index);
2391 entry->handler_pc = extable.handler_pc(entry_index);
2392 entry->catchType = extable.catch_type_index(entry_index);
2393 JVM_END
2394
2395
2396 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2397 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2398 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2401 return method->exception_table_length();
2402 JVM_END
2403
2404
2405 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2406 JVMWrapper("JVM_GetMethodIxModifiers");
2407 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2408 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2409 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2410 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2411 JVM_END
2412
2413
2414 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2415 JVMWrapper("JVM_GetFieldIxModifiers");
2416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2417 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2419 JVM_END
2420
2421
2422 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2423 JVMWrapper("JVM_GetMethodIxLocalsCount");
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2427 return method->max_locals();
2428 JVM_END
2429
2430
2431 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2432 JVMWrapper("JVM_GetMethodIxArgsSize");
2433 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2434 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2435 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2436 return method->size_of_parameters();
2437 JVM_END
2438
2439
2440 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2441 JVMWrapper("JVM_GetMethodIxMaxStack");
2442 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2445 return method->verifier_max_stack();
2446 JVM_END
2447
2448
2449 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2450 JVMWrapper("JVM_IsConstructorIx");
2451 ResourceMark rm(THREAD);
2452 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2453 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2454 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2455 return method->name() == vmSymbols::object_initializer_name();
2456 JVM_END
2457
2458
2459 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2460 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2461 ResourceMark rm(THREAD);
2462 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2465 return method->is_overpass();
2466 JVM_END
2467
2468 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2469 JVMWrapper("JVM_GetMethodIxIxUTF");
2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2473 return method->name()->as_utf8();
2474 JVM_END
2475
2476
2477 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2478 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2482 return method->signature()->as_utf8();
2483 JVM_END
2484
2485 /**
2486 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2487 * read entries in the constant pool. Since the old verifier always
2488 * works on a copy of the code, it will not see any rewriting that
2489 * may possibly occur in the middle of verification. So it is important
2490 * that nothing it calls tries to use the cpCache instead of the raw
2491 * constant pool, so we must use cp->uncached_x methods when appropriate.
2492 */
2493 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2494 JVMWrapper("JVM_GetCPFieldNameUTF");
2495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2498 switch (cp->tag_at(cp_index).value()) {
2499 case JVM_CONSTANT_Fieldref:
2500 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2501 default:
2502 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2503 }
2504 ShouldNotReachHere();
2505 return NULL;
2506 JVM_END
2507
2508
2509 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2510 JVMWrapper("JVM_GetCPMethodNameUTF");
2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2514 switch (cp->tag_at(cp_index).value()) {
2515 case JVM_CONSTANT_InterfaceMethodref:
2516 case JVM_CONSTANT_Methodref:
2517 case JVM_CONSTANT_NameAndType: // for invokedynamic
2518 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2519 default:
2520 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2521 }
2522 ShouldNotReachHere();
2523 return NULL;
2524 JVM_END
2525
2526
2527 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2528 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2529 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2530 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2531 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2532 switch (cp->tag_at(cp_index).value()) {
2533 case JVM_CONSTANT_InterfaceMethodref:
2534 case JVM_CONSTANT_Methodref:
2535 case JVM_CONSTANT_NameAndType: // for invokedynamic
2536 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2537 default:
2538 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2539 }
2540 ShouldNotReachHere();
2541 return NULL;
2542 JVM_END
2543
2544
2545 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2546 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2547 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2548 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2550 switch (cp->tag_at(cp_index).value()) {
2551 case JVM_CONSTANT_Fieldref:
2552 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2553 default:
2554 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2555 }
2556 ShouldNotReachHere();
2557 return NULL;
2558 JVM_END
2559
2560
2561 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2562 JVMWrapper("JVM_GetCPClassNameUTF");
2563 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2564 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2565 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2566 Symbol* classname = cp->klass_name_at(cp_index);
2567 return classname->as_utf8();
2568 JVM_END
2569
2570
2571 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2572 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2575 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2576 switch (cp->tag_at(cp_index).value()) {
2577 case JVM_CONSTANT_Fieldref: {
2578 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2579 Symbol* classname = cp->klass_name_at(class_index);
2580 return classname->as_utf8();
2581 }
2582 default:
2583 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2584 }
2585 ShouldNotReachHere();
2586 return NULL;
2587 JVM_END
2588
2589
2590 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2591 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2593 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2594 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2595 switch (cp->tag_at(cp_index).value()) {
2596 case JVM_CONSTANT_Methodref:
2597 case JVM_CONSTANT_InterfaceMethodref: {
2598 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2599 Symbol* classname = cp->klass_name_at(class_index);
2600 return classname->as_utf8();
2601 }
2602 default:
2603 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2604 }
2605 ShouldNotReachHere();
2606 return NULL;
2607 JVM_END
2608
2609
2610 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2611 JVMWrapper("JVM_GetCPFieldModifiers");
2612 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2613 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2614 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2615 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2616 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2617 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2618 switch (cp->tag_at(cp_index).value()) {
2619 case JVM_CONSTANT_Fieldref: {
2620 Symbol* name = cp->uncached_name_ref_at(cp_index);
2621 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2622 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2623 if (fs.name() == name && fs.signature() == signature) {
2624 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2625 }
2626 }
2627 return -1;
2628 }
2629 default:
2630 fatal("JVM_GetCPFieldModifiers: illegal constant");
2631 }
2632 ShouldNotReachHere();
2633 return 0;
2634 JVM_END
2635
2636
2637 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2638 JVMWrapper("JVM_GetCPMethodModifiers");
2639 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2640 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2641 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2642 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2643 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2644 switch (cp->tag_at(cp_index).value()) {
2645 case JVM_CONSTANT_Methodref:
2646 case JVM_CONSTANT_InterfaceMethodref: {
2647 Symbol* name = cp->uncached_name_ref_at(cp_index);
2648 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2649 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2650 int methods_count = methods->length();
2651 for (int i = 0; i < methods_count; i++) {
2652 Method* method = methods->at(i);
2653 if (method->name() == name && method->signature() == signature) {
2654 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2655 }
2656 }
2657 return -1;
2658 }
2659 default:
2660 fatal("JVM_GetCPMethodModifiers: illegal constant");
2661 }
2662 ShouldNotReachHere();
2663 return 0;
2664 JVM_END
2665
2666
2667 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2668
2669 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2670 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2671 JVM_END
2672
2673
2674 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2675 JVMWrapper("JVM_IsSameClassPackage");
2676 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2677 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2678 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2679 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2680 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2681 JVM_END
2682
2683
2684 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2685
2686 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2687 JVMWrapper2("JVM_Open (%s)", fname);
2688
2689 //%note jvm_r6
2690 int result = os::open(fname, flags, mode);
2691 if (result >= 0) {
2692 return result;
2693 } else {
2694 switch(errno) {
2695 case EEXIST:
2696 return JVM_EEXIST;
2697 default:
2698 return -1;
2699 }
2700 }
2701 JVM_END
2702
2703
2704 JVM_LEAF(jint, JVM_Close(jint fd))
2705 JVMWrapper2("JVM_Close (0x%x)", fd);
2706 //%note jvm_r6
2707 return os::close(fd);
2708 JVM_END
2709
2710
2711 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2712 JVMWrapper2("JVM_Read (0x%x)", fd);
2713
2714 //%note jvm_r6
2715 return (jint)os::restartable_read(fd, buf, nbytes);
2716 JVM_END
2717
2718
2719 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2720 JVMWrapper2("JVM_Write (0x%x)", fd);
2721
2722 //%note jvm_r6
2723 return (jint)os::write(fd, buf, nbytes);
2724 JVM_END
2725
2726
2727 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2728 JVMWrapper2("JVM_Available (0x%x)", fd);
2729 //%note jvm_r6
2730 return os::available(fd, pbytes);
2731 JVM_END
2732
2733
2734 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2735 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2736 //%note jvm_r6
2737 return os::lseek(fd, offset, whence);
2738 JVM_END
2739
2740
2741 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2742 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2743 return os::ftruncate(fd, length);
2744 JVM_END
2745
2746
2747 JVM_LEAF(jint, JVM_Sync(jint fd))
2748 JVMWrapper2("JVM_Sync (0x%x)", fd);
2749 //%note jvm_r6
2750 return os::fsync(fd);
2751 JVM_END
2752
2753
2754 // Printing support //////////////////////////////////////////////////
2755 extern "C" {
2756
2757 ATTRIBUTE_PRINTF(3, 0)
2758 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2759 // see bug 4399518, 4417214
2760 if ((intptr_t)count <= 0) return -1;
2761 return vsnprintf(str, count, fmt, args);
2762 }
2763
2764 ATTRIBUTE_PRINTF(3, 0)
2765 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2766 va_list args;
2767 int len;
2768 va_start(args, fmt);
2769 len = jio_vsnprintf(str, count, fmt, args);
2770 va_end(args);
2771 return len;
2772 }
2773
2774 ATTRIBUTE_PRINTF(2,3)
2775 int jio_fprintf(FILE* f, const char *fmt, ...) {
2776 int len;
2777 va_list args;
2778 va_start(args, fmt);
2779 len = jio_vfprintf(f, fmt, args);
2780 va_end(args);
2781 return len;
2782 }
2783
2784 ATTRIBUTE_PRINTF(2, 0)
2785 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2786 if (Arguments::vfprintf_hook() != NULL) {
2787 return Arguments::vfprintf_hook()(f, fmt, args);
2788 } else {
2789 return vfprintf(f, fmt, args);
2790 }
2791 }
2792
2793 ATTRIBUTE_PRINTF(1, 2)
2794 JNIEXPORT int jio_printf(const char *fmt, ...) {
2795 int len;
2796 va_list args;
2797 va_start(args, fmt);
2798 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2799 va_end(args);
2800 return len;
2801 }
2802
2803
2804 // HotSpot specific jio method
2805 void jio_print(const char* s) {
2806 // Try to make this function as atomic as possible.
2807 if (Arguments::vfprintf_hook() != NULL) {
2808 jio_fprintf(defaultStream::output_stream(), "%s", s);
2809 } else {
2810 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2811 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2812 }
2813 }
2814
2815 } // Extern C
2816
2817 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2818
2819 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2820 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2821 // OSThread objects. The exception to this rule is when the target object is the thread
2822 // doing the operation, in which case we know that the thread won't exit until the
2823 // operation is done (all exits being voluntary). There are a few cases where it is
2824 // rather silly to do operations on yourself, like resuming yourself or asking whether
2825 // you are alive. While these can still happen, they are not subject to deadlocks if
2826 // the lock is held while the operation occurs (this is not the case for suspend, for
2827 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2828 // implementation is local to this file, we always lock Threads_lock for that one.
2829
2830 static void thread_entry(JavaThread* thread, TRAPS) {
2831 HandleMark hm(THREAD);
2832 Handle obj(THREAD, thread->threadObj());
2833 JavaValue result(T_VOID);
2834 JavaCalls::call_virtual(&result,
2835 obj,
2836 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2837 vmSymbols::run_method_name(),
2838 vmSymbols::void_method_signature(),
2839 THREAD);
2840 }
2841
2842
2843 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2844 JVMWrapper("JVM_StartThread");
2845 JavaThread *native_thread = NULL;
2846
2847 // We cannot hold the Threads_lock when we throw an exception,
2848 // due to rank ordering issues. Example: we might need to grab the
2849 // Heap_lock while we construct the exception.
2850 bool throw_illegal_thread_state = false;
2851
2852 // We must release the Threads_lock before we can post a jvmti event
2853 // in Thread::start.
2854 {
2855 // Ensure that the C++ Thread and OSThread structures aren't freed before
2856 // we operate.
2857 MutexLocker mu(Threads_lock);
2858
2859 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2860 // re-starting an already started thread, so we should usually find
2861 // that the JavaThread is null. However for a JNI attached thread
2862 // there is a small window between the Thread object being created
2863 // (with its JavaThread set) and the update to its threadStatus, so we
2864 // have to check for this
2865 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2866 throw_illegal_thread_state = true;
2867 } else {
2868 // We could also check the stillborn flag to see if this thread was already stopped, but
2869 // for historical reasons we let the thread detect that itself when it starts running
2870
2871 jlong size =
2872 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2873 // Allocate the C++ Thread structure and create the native thread. The
2874 // stack size retrieved from java is signed, but the constructor takes
2875 // size_t (an unsigned type), so avoid passing negative values which would
2876 // result in really large stacks.
2877 size_t sz = size > 0 ? (size_t) size : 0;
2878 native_thread = new JavaThread(&thread_entry, sz);
2879
2880 // At this point it may be possible that no osthread was created for the
2881 // JavaThread due to lack of memory. Check for this situation and throw
2882 // an exception if necessary. Eventually we may want to change this so
2883 // that we only grab the lock if the thread was created successfully -
2884 // then we can also do this check and throw the exception in the
2885 // JavaThread constructor.
2886 if (native_thread->osthread() != NULL) {
2887 // Note: the current thread is not being used within "prepare".
2888 native_thread->prepare(jthread);
2889 }
2890 }
2891 }
2892
2893 if (throw_illegal_thread_state) {
2894 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2895 }
2896
2897 assert(native_thread != NULL, "Starting null thread?");
2898
2899 if (native_thread->osthread() == NULL) {
2900 // No one should hold a reference to the 'native_thread'.
2901 delete native_thread;
2902 if (JvmtiExport::should_post_resource_exhausted()) {
2903 JvmtiExport::post_resource_exhausted(
2904 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2905 os::native_thread_creation_failed_msg());
2906 }
2907 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2908 os::native_thread_creation_failed_msg());
2909 }
2910
2911 Thread::start(native_thread);
2912
2913 JVM_END
2914
2915 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2916 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2917 // but is thought to be reliable and simple. In the case, where the receiver is the
2918 // same thread as the sender, no safepoint is needed.
2919 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2920 JVMWrapper("JVM_StopThread");
2921
2922 oop java_throwable = JNIHandles::resolve(throwable);
2923 if (java_throwable == NULL) {
2924 THROW(vmSymbols::java_lang_NullPointerException());
2925 }
2926 oop java_thread = JNIHandles::resolve_non_null(jthread);
2927 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2928 Events::log_exception(JavaThread::current(),
2929 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2930 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2931 // First check if thread is alive
2932 if (receiver != NULL) {
2933 // Check if exception is getting thrown at self (use oop equality, since the
2934 // target object might exit)
2935 if (java_thread == thread->threadObj()) {
2936 THROW_OOP(java_throwable);
2937 } else {
2938 // Enques a VM_Operation to stop all threads and then deliver the exception...
2939 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2940 }
2941 }
2942 else {
2943 // Either:
2944 // - target thread has not been started before being stopped, or
2945 // - target thread already terminated
2946 // We could read the threadStatus to determine which case it is
2947 // but that is overkill as it doesn't matter. We must set the
2948 // stillborn flag for the first case, and if the thread has already
2949 // exited setting this flag has no affect
2950 java_lang_Thread::set_stillborn(java_thread);
2951 }
2952 JVM_END
2953
2954
2955 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2956 JVMWrapper("JVM_IsThreadAlive");
2957
2958 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2959 return java_lang_Thread::is_alive(thread_oop);
2960 JVM_END
2961
2962
2963 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2964 JVMWrapper("JVM_SuspendThread");
2965 oop java_thread = JNIHandles::resolve_non_null(jthread);
2966 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2967
2968 if (receiver != NULL) {
2969 // thread has run and has not exited (still on threads list)
2970
2971 {
2972 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2973 if (receiver->is_external_suspend()) {
2974 // Don't allow nested external suspend requests. We can't return
2975 // an error from this interface so just ignore the problem.
2976 return;
2977 }
2978 if (receiver->is_exiting()) { // thread is in the process of exiting
2979 return;
2980 }
2981 receiver->set_external_suspend();
2982 }
2983
2984 // java_suspend() will catch threads in the process of exiting
2985 // and will ignore them.
2986 receiver->java_suspend();
2987
2988 // It would be nice to have the following assertion in all the
2989 // time, but it is possible for a racing resume request to have
2990 // resumed this thread right after we suspended it. Temporarily
2991 // enable this assertion if you are chasing a different kind of
2992 // bug.
2993 //
2994 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2995 // receiver->is_being_ext_suspended(), "thread is not suspended");
2996 }
2997 JVM_END
2998
2999
3000 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3001 JVMWrapper("JVM_ResumeThread");
3002 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3003 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3004 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3005 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3006 // looks at it.
3007 MutexLocker ml(Threads_lock);
3008 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3009 if (thr != NULL) {
3010 // the thread has run and is not in the process of exiting
3011 thr->java_resume();
3012 }
3013 JVM_END
3014
3015
3016 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3017 JVMWrapper("JVM_SetThreadPriority");
3018 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3019 MutexLocker ml(Threads_lock);
3020 oop java_thread = JNIHandles::resolve_non_null(jthread);
3021 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3022 JavaThread* thr = java_lang_Thread::thread(java_thread);
3023 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3024 Thread::set_priority(thr, (ThreadPriority)prio);
3025 }
3026 JVM_END
3027
3028
3029 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3030 JVMWrapper("JVM_Yield");
3031 if (os::dont_yield()) return;
3032 HOTSPOT_THREAD_YIELD();
3033
3034 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3035 // Critical for similar threading behaviour
3036 if (ConvertYieldToSleep) {
3037 os::sleep(thread, MinSleepInterval, false);
3038 } else {
3039 os::naked_yield();
3040 }
3041 JVM_END
3042
3043
3044 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3045 JVMWrapper("JVM_Sleep");
3046
3047 if (millis < 0) {
3048 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3049 }
3050
3051 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3052 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3053 }
3054
3055 // Save current thread state and restore it at the end of this block.
3056 // And set new thread state to SLEEPING.
3057 JavaThreadSleepState jtss(thread);
3058
3059 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3060
3061 EventThreadSleep event;
3062
3063 if (millis == 0) {
3064 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3065 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3066 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3067 // for SOLARIS
3068 if (ConvertSleepToYield) {
3069 os::naked_yield();
3070 } else {
3071 ThreadState old_state = thread->osthread()->get_state();
3072 thread->osthread()->set_state(SLEEPING);
3073 os::sleep(thread, MinSleepInterval, false);
3074 thread->osthread()->set_state(old_state);
3075 }
3076 } else {
3077 ThreadState old_state = thread->osthread()->get_state();
3078 thread->osthread()->set_state(SLEEPING);
3079 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3080 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3081 // us while we were sleeping. We do not overwrite those.
3082 if (!HAS_PENDING_EXCEPTION) {
3083 if (event.should_commit()) {
3084 event.set_time(millis);
3085 event.commit();
3086 }
3087 HOTSPOT_THREAD_SLEEP_END(1);
3088
3089 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3090 // to properly restore the thread state. That's likely wrong.
3091 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3092 }
3093 }
3094 thread->osthread()->set_state(old_state);
3095 }
3096 if (event.should_commit()) {
3097 event.set_time(millis);
3098 event.commit();
3099 }
3100 HOTSPOT_THREAD_SLEEP_END(0);
3101 JVM_END
3102
3103 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3104 JVMWrapper("JVM_CurrentThread");
3105 oop jthread = thread->threadObj();
3106 assert (thread != NULL, "no current thread!");
3107 return JNIHandles::make_local(env, jthread);
3108 JVM_END
3109
3110
3111 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3112 JVMWrapper("JVM_CountStackFrames");
3113
3114 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3115 oop java_thread = JNIHandles::resolve_non_null(jthread);
3116 bool throw_illegal_thread_state = false;
3117 int count = 0;
3118
3119 {
3120 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3121 // We need to re-resolve the java_thread, since a GC might have happened during the
3122 // acquire of the lock
3123 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3124
3125 if (thr == NULL) {
3126 // do nothing
3127 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3128 // Check whether this java thread has been suspended already. If not, throws
3129 // IllegalThreadStateException. We defer to throw that exception until
3130 // Threads_lock is released since loading exception class has to leave VM.
3131 // The correct way to test a thread is actually suspended is
3132 // wait_for_ext_suspend_completion(), but we can't call that while holding
3133 // the Threads_lock. The above tests are sufficient for our purposes
3134 // provided the walkability of the stack is stable - which it isn't
3135 // 100% but close enough for most practical purposes.
3136 throw_illegal_thread_state = true;
3137 } else {
3138 // Count all java activation, i.e., number of vframes
3139 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3140 // Native frames are not counted
3141 if (!vfst.method()->is_native()) count++;
3142 }
3143 }
3144 }
3145
3146 if (throw_illegal_thread_state) {
3147 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3148 "this thread is not suspended");
3149 }
3150 return count;
3151 JVM_END
3152
3153 // Consider: A better way to implement JVM_Interrupt() is to acquire
3154 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3155 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3156 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3157 // outside the critical section. Threads_lock is hot so we want to minimize
3158 // the hold-time. A cleaner interface would be to decompose interrupt into
3159 // two steps. The 1st phase, performed under Threads_lock, would return
3160 // a closure that'd be invoked after Threads_lock was dropped.
3161 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3162 // admit spurious wakeups.
3163
3164 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3165 JVMWrapper("JVM_Interrupt");
3166
3167 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3168 oop java_thread = JNIHandles::resolve_non_null(jthread);
3169 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3170 // We need to re-resolve the java_thread, since a GC might have happened during the
3171 // acquire of the lock
3172 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3173 if (thr != NULL) {
3174 Thread::interrupt(thr);
3175 }
3176 JVM_END
3177
3178
3179 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3180 JVMWrapper("JVM_IsInterrupted");
3181
3182 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3183 oop java_thread = JNIHandles::resolve_non_null(jthread);
3184 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3185 // We need to re-resolve the java_thread, since a GC might have happened during the
3186 // acquire of the lock
3187 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3188 if (thr == NULL) {
3189 return JNI_FALSE;
3190 } else {
3191 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3192 }
3193 JVM_END
3194
3195
3196 // Return true iff the current thread has locked the object passed in
3197
3198 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3199 JVMWrapper("JVM_HoldsLock");
3200 assert(THREAD->is_Java_thread(), "sanity check");
3201 if (obj == NULL) {
3202 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3203 }
3204 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3205 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3206 JVM_END
3207
3208
3209 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3210 JVMWrapper("JVM_DumpAllStacks");
3211 VM_PrintThreads op;
3212 VMThread::execute(&op);
3213 if (JvmtiExport::should_post_data_dump()) {
3214 JvmtiExport::post_data_dump();
3215 }
3216 JVM_END
3217
3218 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3219 JVMWrapper("JVM_SetNativeThreadName");
3220 ResourceMark rm(THREAD);
3221 oop java_thread = JNIHandles::resolve_non_null(jthread);
3222 JavaThread* thr = java_lang_Thread::thread(java_thread);
3223 // Thread naming only supported for the current thread, doesn't work for
3224 // target threads.
3225 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3226 // we don't set the name of an attached thread to avoid stepping
3227 // on other programs
3228 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3229 os::set_native_thread_name(thread_name);
3230 }
3231 JVM_END
3232
3233 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3234
3235 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3236 assert(jthread->is_Java_thread(), "must be a Java thread");
3237 if (jthread->privileged_stack_top() == NULL) return false;
3238 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3239 oop loader = jthread->privileged_stack_top()->class_loader();
3240 if (loader == NULL) return true;
3241 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3242 if (trusted) return true;
3243 }
3244 return false;
3245 }
3246
3247 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3248 JVMWrapper("JVM_CurrentLoadedClass");
3249 ResourceMark rm(THREAD);
3250
3251 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3252 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3253 bool trusted = is_trusted_frame(thread, &vfst);
3254 if (trusted) return NULL;
3255
3256 Method* m = vfst.method();
3257 if (!m->is_native()) {
3258 InstanceKlass* holder = m->method_holder();
3259 oop loader = holder->class_loader();
3260 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3261 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3262 }
3263 }
3264 }
3265 return NULL;
3266 JVM_END
3267
3268
3269 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3270 JVMWrapper("JVM_CurrentClassLoader");
3271 ResourceMark rm(THREAD);
3272
3273 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3274
3275 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3276 bool trusted = is_trusted_frame(thread, &vfst);
3277 if (trusted) return NULL;
3278
3279 Method* m = vfst.method();
3280 if (!m->is_native()) {
3281 InstanceKlass* holder = m->method_holder();
3282 assert(holder->is_klass(), "just checking");
3283 oop loader = holder->class_loader();
3284 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3285 return JNIHandles::make_local(env, loader);
3286 }
3287 }
3288 }
3289 return NULL;
3290 JVM_END
3291
3292
3293 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3294 JVMWrapper("JVM_GetClassContext");
3295 ResourceMark rm(THREAD);
3296 JvmtiVMObjectAllocEventCollector oam;
3297 vframeStream vfst(thread);
3298
3299 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3300 // This must only be called from SecurityManager.getClassContext
3301 Method* m = vfst.method();
3302 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3303 m->name() == vmSymbols::getClassContext_name() &&
3304 m->signature() == vmSymbols::void_class_array_signature())) {
3305 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3306 }
3307 }
3308
3309 // Collect method holders
3310 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3311 for (; !vfst.at_end(); vfst.security_next()) {
3312 Method* m = vfst.method();
3313 // Native frames are not returned
3314 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3315 Klass* holder = m->method_holder();
3316 assert(holder->is_klass(), "just checking");
3317 klass_array->append(holder);
3318 }
3319 }
3320
3321 // Create result array of type [Ljava/lang/Class;
3322 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3323 // Fill in mirrors corresponding to method holders
3324 for (int i = 0; i < klass_array->length(); i++) {
3325 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3326 }
3327
3328 return (jobjectArray) JNIHandles::make_local(env, result);
3329 JVM_END
3330
3331
3332 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3333 JVMWrapper("JVM_ClassDepth");
3334 ResourceMark rm(THREAD);
3335 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3336 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3337
3338 const char* str = java_lang_String::as_utf8_string(class_name_str());
3339 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3340 if (class_name_sym == NULL) {
3341 return -1;
3342 }
3343
3344 int depth = 0;
3345
3346 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3347 if (!vfst.method()->is_native()) {
3348 InstanceKlass* holder = vfst.method()->method_holder();
3349 assert(holder->is_klass(), "just checking");
3350 if (holder->name() == class_name_sym) {
3351 return depth;
3352 }
3353 depth++;
3354 }
3355 }
3356 return -1;
3357 JVM_END
3358
3359
3360 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3361 JVMWrapper("JVM_ClassLoaderDepth");
3362 ResourceMark rm(THREAD);
3363 int depth = 0;
3364 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3365 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3366 bool trusted = is_trusted_frame(thread, &vfst);
3367 if (trusted) return -1;
3368
3369 Method* m = vfst.method();
3370 if (!m->is_native()) {
3371 InstanceKlass* holder = m->method_holder();
3372 assert(holder->is_klass(), "just checking");
3373 oop loader = holder->class_loader();
3374 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3375 return depth;
3376 }
3377 depth++;
3378 }
3379 }
3380 return -1;
3381 JVM_END
3382
3383
3384 // java.lang.Package ////////////////////////////////////////////////////////////////
3385
3386
3387 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3388 JVMWrapper("JVM_GetSystemPackage");
3389 ResourceMark rm(THREAD);
3390 JvmtiVMObjectAllocEventCollector oam;
3391 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3392 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3393 return (jstring) JNIHandles::make_local(result);
3394 JVM_END
3395
3396
3397 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3398 JVMWrapper("JVM_GetSystemPackages");
3399 JvmtiVMObjectAllocEventCollector oam;
3400 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3401 return (jobjectArray) JNIHandles::make_local(result);
3402 JVM_END
3403
3404
3405 // ObjectInputStream ///////////////////////////////////////////////////////////////
3406
3407 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3408 if (current_class == NULL) {
3409 return true;
3410 }
3411 if ((current_class == field_class) || access.is_public()) {
3412 return true;
3413 }
3414
3415 if (access.is_protected()) {
3416 // See if current_class is a subclass of field_class
3417 if (current_class->is_subclass_of(field_class)) {
3418 return true;
3419 }
3420 }
3421
3422 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3423 }
3424
3425
3426 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3427 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3428 JVMWrapper("JVM_AllocateNewObject");
3429 JvmtiVMObjectAllocEventCollector oam;
3430 // Receiver is not used
3431 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3432 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3433
3434 // Cannot instantiate primitive types
3435 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3436 ResourceMark rm(THREAD);
3437 THROW_0(vmSymbols::java_lang_InvalidClassException());
3438 }
3439
3440 // Arrays not allowed here, must use JVM_AllocateNewArray
3441 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3442 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3443 ResourceMark rm(THREAD);
3444 THROW_0(vmSymbols::java_lang_InvalidClassException());
3445 }
3446
3447 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3448 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3449
3450 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3451
3452 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3453 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3454
3455 // Make sure klass is initialized, since we are about to instantiate one of them.
3456 curr_klass->initialize(CHECK_NULL);
3457
3458 methodHandle m (THREAD,
3459 init_klass->find_method(vmSymbols::object_initializer_name(),
3460 vmSymbols::void_method_signature()));
3461 if (m.is_null()) {
3462 ResourceMark rm(THREAD);
3463 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3464 Method::name_and_sig_as_C_string(init_klass(),
3465 vmSymbols::object_initializer_name(),
3466 vmSymbols::void_method_signature()));
3467 }
3468
3469 if (curr_klass == init_klass && !m->is_public()) {
3470 // Calling the constructor for class 'curr_klass'.
3471 // Only allow calls to a public no-arg constructor.
3472 // This path corresponds to creating an Externalizable object.
3473 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3474 }
3475
3476 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3477 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3478 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3479 }
3480
3481 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3482 // Call constructor m. This might call a constructor higher up in the hierachy
3483 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3484
3485 return JNIHandles::make_local(obj());
3486 JVM_END
3487
3488
3489 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3490 JVMWrapper("JVM_AllocateNewArray");
3491 JvmtiVMObjectAllocEventCollector oam;
3492 oop mirror = JNIHandles::resolve_non_null(currClass);
3493
3494 if (java_lang_Class::is_primitive(mirror)) {
3495 THROW_0(vmSymbols::java_lang_InvalidClassException());
3496 }
3497 Klass* k = java_lang_Class::as_Klass(mirror);
3498 oop result;
3499
3500 if (k->oop_is_typeArray()) {
3501 // typeArray
3502 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3503 } else if (k->oop_is_objArray()) {
3504 // objArray
3505 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3506 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3507 result = oak->allocate(length, CHECK_NULL);
3508 } else {
3509 THROW_0(vmSymbols::java_lang_InvalidClassException());
3510 }
3511 return JNIHandles::make_local(env, result);
3512 JVM_END
3513
3514
3515 // Return the first non-null class loader up the execution stack, or null
3516 // if only code from the null class loader is on the stack.
3517
3518 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3519 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3520 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3521 oop loader = vfst.method()->method_holder()->class_loader();
3522 if (loader != NULL) {
3523 return JNIHandles::make_local(env, loader);
3524 }
3525 }
3526 return NULL;
3527 JVM_END
3528
3529
3530 // Load a class relative to the most recent class on the stack with a non-null
3531 // classloader.
3532 // This function has been deprecated and should not be considered part of the
3533 // specified JVM interface.
3534
3535 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3536 jclass currClass, jstring currClassName))
3537 JVMWrapper("JVM_LoadClass0");
3538 // Receiver is not used
3539 ResourceMark rm(THREAD);
3540
3541 // Class name argument is not guaranteed to be in internal format
3542 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3543 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3544
3545 const char* str = java_lang_String::as_utf8_string(string());
3546
3547 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3548 // It's impossible to create this class; the name cannot fit
3549 // into the constant pool.
3550 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3551 }
3552
3553 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3554 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3555 // Find the most recent class on the stack with a non-null classloader
3556 oop loader = NULL;
3557 oop protection_domain = NULL;
3558 if (curr_klass.is_null()) {
3559 for (vframeStream vfst(thread);
3560 !vfst.at_end() && loader == NULL;
3561 vfst.next()) {
3562 if (!vfst.method()->is_native()) {
3563 InstanceKlass* holder = vfst.method()->method_holder();
3564 loader = holder->class_loader();
3565 protection_domain = holder->protection_domain();
3566 }
3567 }
3568 } else {
3569 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3570 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3571 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3572 }
3573 Handle h_loader(THREAD, loader);
3574 Handle h_prot (THREAD, protection_domain);
3575 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3576 false, thread);
3577 if (TraceClassResolution && result != NULL) {
3578 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3579 }
3580 return result;
3581 JVM_END
3582
3583
3584 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3585
3586
3587 // resolve array handle and check arguments
3588 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3589 if (arr == NULL) {
3590 THROW_0(vmSymbols::java_lang_NullPointerException());
3591 }
3592 oop a = JNIHandles::resolve_non_null(arr);
3593 if (!a->is_array()) {
3594 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3595 } else if (type_array_only && !a->is_typeArray()) {
3596 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not a primitive type array");
3597 }
3598 return arrayOop(a);
3599 }
3600
3601
3602 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3603 JVMWrapper("JVM_GetArrayLength");
3604 arrayOop a = check_array(env, arr, false, CHECK_0);
3605 return a->length();
3606 JVM_END
3607
3608
3609 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3610 JVMWrapper("JVM_Array_Get");
3611 JvmtiVMObjectAllocEventCollector oam;
3612 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3613 jvalue value;
3614 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3615 oop box = Reflection::box(&value, type, CHECK_NULL);
3616 return JNIHandles::make_local(env, box);
3617 JVM_END
3618
3619
3620 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3621 JVMWrapper("JVM_GetPrimitiveArrayElement");
3622 jvalue value;
3623 value.i = 0; // to initialize value before getting used in CHECK
3624 arrayOop a = check_array(env, arr, true, CHECK_(value));
3625 assert(a->is_typeArray(), "just checking");
3626 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3627 BasicType wide_type = (BasicType) wCode;
3628 if (type != wide_type) {
3629 Reflection::widen(&value, type, wide_type, CHECK_(value));
3630 }
3631 return value;
3632 JVM_END
3633
3634
3635 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3636 JVMWrapper("JVM_SetArrayElement");
3637 arrayOop a = check_array(env, arr, false, CHECK);
3638 oop box = JNIHandles::resolve(val);
3639 jvalue value;
3640 value.i = 0; // to initialize value before getting used in CHECK
3641 BasicType value_type;
3642 if (a->is_objArray()) {
3643 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3644 value_type = Reflection::unbox_for_regular_object(box, &value);
3645 } else {
3646 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3647 }
3648 Reflection::array_set(&value, a, index, value_type, CHECK);
3649 JVM_END
3650
3651
3652 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3653 JVMWrapper("JVM_SetPrimitiveArrayElement");
3654 arrayOop a = check_array(env, arr, true, CHECK);
3655 assert(a->is_typeArray(), "just checking");
3656 BasicType value_type = (BasicType) vCode;
3657 Reflection::array_set(&v, a, index, value_type, CHECK);
3658 JVM_END
3659
3660
3661 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3662 JVMWrapper("JVM_NewArray");
3663 JvmtiVMObjectAllocEventCollector oam;
3664 oop element_mirror = JNIHandles::resolve(eltClass);
3665 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3666 return JNIHandles::make_local(env, result);
3667 JVM_END
3668
3669
3670 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3671 JVMWrapper("JVM_NewMultiArray");
3672 JvmtiVMObjectAllocEventCollector oam;
3673 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3674 oop element_mirror = JNIHandles::resolve(eltClass);
3675 assert(dim_array->is_typeArray(), "just checking");
3676 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3677 return JNIHandles::make_local(env, result);
3678 JVM_END
3679
3680
3681 // Networking library support ////////////////////////////////////////////////////////////////////
3682
3683 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3684 JVMWrapper("JVM_InitializeSocketLibrary");
3685 return 0;
3686 JVM_END
3687
3688
3689 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3690 JVMWrapper("JVM_Socket");
3691 return os::socket(domain, type, protocol);
3692 JVM_END
3693
3694
3695 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3696 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3697 //%note jvm_r6
3698 return os::socket_close(fd);
3699 JVM_END
3700
3701
3702 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3703 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3704 //%note jvm_r6
3705 return os::socket_shutdown(fd, howto);
3706 JVM_END
3707
3708
3709 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3710 JVMWrapper2("JVM_Recv (0x%x)", fd);
3711 //%note jvm_r6
3712 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3713 JVM_END
3714
3715
3716 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3717 JVMWrapper2("JVM_Send (0x%x)", fd);
3718 //%note jvm_r6
3719 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3720 JVM_END
3721
3722
3723 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3724 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3725 //%note jvm_r6
3726 return os::timeout(fd, timeout);
3727 JVM_END
3728
3729
3730 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3731 JVMWrapper2("JVM_Listen (0x%x)", fd);
3732 //%note jvm_r6
3733 return os::listen(fd, count);
3734 JVM_END
3735
3736
3737 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3738 JVMWrapper2("JVM_Connect (0x%x)", fd);
3739 //%note jvm_r6
3740 return os::connect(fd, him, (socklen_t)len);
3741 JVM_END
3742
3743
3744 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3745 JVMWrapper2("JVM_Bind (0x%x)", fd);
3746 //%note jvm_r6
3747 return os::bind(fd, him, (socklen_t)len);
3748 JVM_END
3749
3750
3751 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3752 JVMWrapper2("JVM_Accept (0x%x)", fd);
3753 //%note jvm_r6
3754 socklen_t socklen = (socklen_t)(*len);
3755 jint result = os::accept(fd, him, &socklen);
3756 *len = (jint)socklen;
3757 return result;
3758 JVM_END
3759
3760
3761 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3762 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3763 //%note jvm_r6
3764 socklen_t socklen = (socklen_t)(*fromlen);
3765 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3766 *fromlen = (int)socklen;
3767 return result;
3768 JVM_END
3769
3770
3771 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3772 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3773 //%note jvm_r6
3774 socklen_t socklen = (socklen_t)(*len);
3775 jint result = os::get_sock_name(fd, him, &socklen);
3776 *len = (int)socklen;
3777 return result;
3778 JVM_END
3779
3780
3781 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3782 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3783 //%note jvm_r6
3784 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3785 JVM_END
3786
3787
3788 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3789 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3790 //%note jvm_r6
3791 return os::socket_available(fd, pbytes);
3792 JVM_END
3793
3794
3795 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3796 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3797 //%note jvm_r6
3798 socklen_t socklen = (socklen_t)(*optlen);
3799 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3800 *optlen = (int)socklen;
3801 return result;
3802 JVM_END
3803
3804
3805 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3806 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3807 //%note jvm_r6
3808 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3809 JVM_END
3810
3811
3812 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3813 JVMWrapper("JVM_GetHostName");
3814 return os::get_host_name(name, namelen);
3815 JVM_END
3816
3817
3818 // Library support ///////////////////////////////////////////////////////////////////////////
3819
3820 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3821 //%note jvm_ct
3822 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3823 char ebuf[1024];
3824 void *load_result;
3825 {
3826 ThreadToNativeFromVM ttnfvm(thread);
3827 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3828 }
3829 if (load_result == NULL) {
3830 char msg[1024];
3831 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3832 // Since 'ebuf' may contain a string encoded using
3833 // platform encoding scheme, we need to pass
3834 // Exceptions::unsafe_to_utf8 to the new_exception method
3835 // as the last argument. See bug 6367357.
3836 Handle h_exception =
3837 Exceptions::new_exception(thread,
3838 vmSymbols::java_lang_UnsatisfiedLinkError(),
3839 msg, Exceptions::unsafe_to_utf8);
3840
3841 THROW_HANDLE_0(h_exception);
3842 }
3843 return load_result;
3844 JVM_END
3845
3846
3847 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3848 JVMWrapper("JVM_UnloadLibrary");
3849 os::dll_unload(handle);
3850 JVM_END
3851
3852
3853 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3854 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3855 return os::dll_lookup(handle, name);
3856 JVM_END
3857
3858
3859 // Floating point support ////////////////////////////////////////////////////////////////////
3860
3861 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3862 JVMWrapper("JVM_IsNaN");
3863 return g_isnan(a);
3864 JVM_END
3865
3866
3867 // JNI version ///////////////////////////////////////////////////////////////////////////////
3868
3869 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3870 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3871 return Threads::is_supported_jni_version_including_1_1(version);
3872 JVM_END
3873
3874
3875 // String support ///////////////////////////////////////////////////////////////////////////
3876
3877 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3878 JVMWrapper("JVM_InternString");
3879 JvmtiVMObjectAllocEventCollector oam;
3880 if (str == NULL) return NULL;
3881 oop string = JNIHandles::resolve_non_null(str);
3882 oop result = StringTable::intern(string, CHECK_NULL);
3883 return (jstring) JNIHandles::make_local(env, result);
3884 JVM_END
3885
3886
3887 // Raw monitor support //////////////////////////////////////////////////////////////////////
3888
3889 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3890 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3891 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3892 // that only works with java threads.
3893
3894
3895 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3896 VM_Exit::block_if_vm_exited();
3897 JVMWrapper("JVM_RawMonitorCreate");
3898 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3899 }
3900
3901
3902 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3903 VM_Exit::block_if_vm_exited();
3904 JVMWrapper("JVM_RawMonitorDestroy");
3905 delete ((Mutex*) mon);
3906 }
3907
3908
3909 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3910 VM_Exit::block_if_vm_exited();
3911 JVMWrapper("JVM_RawMonitorEnter");
3912 ((Mutex*) mon)->jvm_raw_lock();
3913 return 0;
3914 }
3915
3916
3917 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3918 VM_Exit::block_if_vm_exited();
3919 JVMWrapper("JVM_RawMonitorExit");
3920 ((Mutex*) mon)->jvm_raw_unlock();
3921 }
3922
3923
3924 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3925
3926 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3927 // Security Note:
3928 // The Java level wrapper will perform the necessary security check allowing
3929 // us to pass the NULL as the initiating class loader.
3930 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3931
3932 KlassHandle klass_handle(THREAD, klass);
3933 // Check if we should initialize the class
3934 if (init && klass_handle->oop_is_instance()) {
3935 klass_handle->initialize(CHECK_NULL);
3936 }
3937 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3938 }
3939
3940
3941 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3942
3943 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3944 JVMWrapper("JVM_InvokeMethod");
3945 Handle method_handle;
3946 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3947 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3948 Handle receiver(THREAD, JNIHandles::resolve(obj));
3949 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3950 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3951 jobject res = JNIHandles::make_local(env, result);
3952 if (JvmtiExport::should_post_vm_object_alloc()) {
3953 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3954 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3955 if (java_lang_Class::is_primitive(ret_type)) {
3956 // Only for primitive type vm allocates memory for java object.
3957 // See box() method.
3958 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3959 }
3960 }
3961 return res;
3962 } else {
3963 THROW_0(vmSymbols::java_lang_StackOverflowError());
3964 }
3965 JVM_END
3966
3967
3968 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3969 JVMWrapper("JVM_NewInstanceFromConstructor");
3970 oop constructor_mirror = JNIHandles::resolve(c);
3971 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3972 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3973 jobject res = JNIHandles::make_local(env, result);
3974 if (JvmtiExport::should_post_vm_object_alloc()) {
3975 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3976 }
3977 return res;
3978 JVM_END
3979
3980 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3981
3982 JVM_LEAF(jboolean, JVM_SupportsCX8())
3983 JVMWrapper("JVM_SupportsCX8");
3984 return VM_Version::supports_cx8();
3985 JVM_END
3986
3987
3988 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
3989 JVMWrapper("JVM_CX8Field");
3990 jlong res;
3991 oop o = JNIHandles::resolve(obj);
3992 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3993 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
3994
3995 assert(VM_Version::supports_cx8(), "cx8 not supported");
3996 res = Atomic::cmpxchg(newVal, addr, oldVal);
3997
3998 return res == oldVal;
3999 JVM_END
4000
4001 // DTrace ///////////////////////////////////////////////////////////////////
4002
4003 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4004 JVMWrapper("JVM_DTraceGetVersion");
4005 return (jint)JVM_TRACING_DTRACE_VERSION;
4006 JVM_END
4007
4008 JVM_ENTRY(jlong,JVM_DTraceActivate(
4009 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4010 JVM_DTraceProvider* providers))
4011 JVMWrapper("JVM_DTraceActivate");
4012 return DTraceJSDT::activate(
4013 version, module_name, providers_count, providers, CHECK_0);
4014 JVM_END
4015
4016 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4017 JVMWrapper("JVM_DTraceIsProbeEnabled");
4018 return DTraceJSDT::is_probe_enabled(method);
4019 JVM_END
4020
4021 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4022 JVMWrapper("JVM_DTraceDispose");
4023 DTraceJSDT::dispose(handle);
4024 JVM_END
4025
4026 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4027 JVMWrapper("JVM_DTraceIsSupported");
4028 return DTraceJSDT::is_supported();
4029 JVM_END
4030
4031 // Returns an array of all live Thread objects (VM internal JavaThreads,
4032 // jvmti agent threads, and JNI attaching threads are skipped)
4033 // See CR 6404306 regarding JNI attaching threads
4034 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4035 ResourceMark rm(THREAD);
4036 ThreadsListEnumerator tle(THREAD, false, false);
4037 JvmtiVMObjectAllocEventCollector oam;
4038
4039 int num_threads = tle.num_threads();
4040 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4041 objArrayHandle threads_ah(THREAD, r);
4042
4043 for (int i = 0; i < num_threads; i++) {
4044 Handle h = tle.get_threadObj(i);
4045 threads_ah->obj_at_put(i, h());
4046 }
4047
4048 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4049 JVM_END
4050
4051
4052 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4053 // Return StackTraceElement[][], each element is the stack trace of a thread in
4054 // the corresponding entry in the given threads array
4055 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4056 JVMWrapper("JVM_DumpThreads");
4057 JvmtiVMObjectAllocEventCollector oam;
4058
4059 // Check if threads is null
4060 if (threads == NULL) {
4061 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4062 }
4063
4064 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4065 objArrayHandle ah(THREAD, a);
4066 int num_threads = ah->length();
4067 // check if threads is non-empty array
4068 if (num_threads == 0) {
4069 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4070 }
4071
4072 // check if threads is not an array of objects of Thread class
4073 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4074 if (k != SystemDictionary::Thread_klass()) {
4075 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4076 }
4077
4078 ResourceMark rm(THREAD);
4079
4080 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4081 for (int i = 0; i < num_threads; i++) {
4082 oop thread_obj = ah->obj_at(i);
4083 instanceHandle h(THREAD, (instanceOop) thread_obj);
4084 thread_handle_array->append(h);
4085 }
4086
4087 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4088 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4089
4090 JVM_END
4091
4092 // JVM monitoring and management support
4093 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4094 return Management::get_jmm_interface(version);
4095 JVM_END
4096
4097 // com.sun.tools.attach.VirtualMachine agent properties support
4098 //
4099 // Initialize the agent properties with the properties maintained in the VM
4100 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4101 JVMWrapper("JVM_InitAgentProperties");
4102 ResourceMark rm;
4103
4104 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4105
4106 PUTPROP(props, "sun.java.command", Arguments::java_command());
4107 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4108 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4109 return properties;
4110 JVM_END
4111
4112 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4113 {
4114 JVMWrapper("JVM_GetEnclosingMethodInfo");
4115 JvmtiVMObjectAllocEventCollector oam;
4116
4117 if (ofClass == NULL) {
4118 return NULL;
4119 }
4120 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4121 // Special handling for primitive objects
4122 if (java_lang_Class::is_primitive(mirror())) {
4123 return NULL;
4124 }
4125 Klass* k = java_lang_Class::as_Klass(mirror());
4126 if (!k->oop_is_instance()) {
4127 return NULL;
4128 }
4129 instanceKlassHandle ik_h(THREAD, k);
4130 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4131 if (encl_method_class_idx == 0) {
4132 return NULL;
4133 }
4134 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4135 objArrayHandle dest(THREAD, dest_o);
4136 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4137 dest->obj_at_put(0, enc_k->java_mirror());
4138 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4139 if (encl_method_method_idx != 0) {
4140 Symbol* sym = ik_h->constants()->symbol_at(
4141 extract_low_short_from_int(
4142 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4143 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4144 dest->obj_at_put(1, str());
4145 sym = ik_h->constants()->symbol_at(
4146 extract_high_short_from_int(
4147 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4148 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4149 dest->obj_at_put(2, str());
4150 }
4151 return (jobjectArray) JNIHandles::make_local(dest());
4152 }
4153 JVM_END
4154
4155 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4156 jint javaThreadState))
4157 {
4158 // If new thread states are added in future JDK and VM versions,
4159 // this should check if the JDK version is compatible with thread
4160 // states supported by the VM. Return NULL if not compatible.
4161 //
4162 // This function must map the VM java_lang_Thread::ThreadStatus
4163 // to the Java thread state that the JDK supports.
4164 //
4165
4166 typeArrayHandle values_h;
4167 switch (javaThreadState) {
4168 case JAVA_THREAD_STATE_NEW : {
4169 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4170 values_h = typeArrayHandle(THREAD, r);
4171 values_h->int_at_put(0, java_lang_Thread::NEW);
4172 break;
4173 }
4174 case JAVA_THREAD_STATE_RUNNABLE : {
4175 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4176 values_h = typeArrayHandle(THREAD, r);
4177 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4178 break;
4179 }
4180 case JAVA_THREAD_STATE_BLOCKED : {
4181 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4182 values_h = typeArrayHandle(THREAD, r);
4183 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4184 break;
4185 }
4186 case JAVA_THREAD_STATE_WAITING : {
4187 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4188 values_h = typeArrayHandle(THREAD, r);
4189 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4190 values_h->int_at_put(1, java_lang_Thread::PARKED);
4191 break;
4192 }
4193 case JAVA_THREAD_STATE_TIMED_WAITING : {
4194 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4195 values_h = typeArrayHandle(THREAD, r);
4196 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4197 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4198 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4199 break;
4200 }
4201 case JAVA_THREAD_STATE_TERMINATED : {
4202 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4203 values_h = typeArrayHandle(THREAD, r);
4204 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4205 break;
4206 }
4207 default:
4208 // Unknown state - probably incompatible JDK version
4209 return NULL;
4210 }
4211
4212 return (jintArray) JNIHandles::make_local(env, values_h());
4213 }
4214 JVM_END
4215
4216
4217 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4218 jint javaThreadState,
4219 jintArray values))
4220 {
4221 // If new thread states are added in future JDK and VM versions,
4222 // this should check if the JDK version is compatible with thread
4223 // states supported by the VM. Return NULL if not compatible.
4224 //
4225 // This function must map the VM java_lang_Thread::ThreadStatus
4226 // to the Java thread state that the JDK supports.
4227 //
4228
4229 ResourceMark rm;
4230
4231 // Check if threads is null
4232 if (values == NULL) {
4233 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4234 }
4235
4236 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4237 typeArrayHandle values_h(THREAD, v);
4238
4239 objArrayHandle names_h;
4240 switch (javaThreadState) {
4241 case JAVA_THREAD_STATE_NEW : {
4242 assert(values_h->length() == 1 &&
4243 values_h->int_at(0) == java_lang_Thread::NEW,
4244 "Invalid threadStatus value");
4245
4246 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4247 1, /* only 1 substate */
4248 CHECK_NULL);
4249 names_h = objArrayHandle(THREAD, r);
4250 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4251 names_h->obj_at_put(0, name());
4252 break;
4253 }
4254 case JAVA_THREAD_STATE_RUNNABLE : {
4255 assert(values_h->length() == 1 &&
4256 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4257 "Invalid threadStatus value");
4258
4259 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4260 1, /* only 1 substate */
4261 CHECK_NULL);
4262 names_h = objArrayHandle(THREAD, r);
4263 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4264 names_h->obj_at_put(0, name());
4265 break;
4266 }
4267 case JAVA_THREAD_STATE_BLOCKED : {
4268 assert(values_h->length() == 1 &&
4269 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4270 "Invalid threadStatus value");
4271
4272 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4273 1, /* only 1 substate */
4274 CHECK_NULL);
4275 names_h = objArrayHandle(THREAD, r);
4276 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4277 names_h->obj_at_put(0, name());
4278 break;
4279 }
4280 case JAVA_THREAD_STATE_WAITING : {
4281 assert(values_h->length() == 2 &&
4282 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4283 values_h->int_at(1) == java_lang_Thread::PARKED,
4284 "Invalid threadStatus value");
4285 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4286 2, /* number of substates */
4287 CHECK_NULL);
4288 names_h = objArrayHandle(THREAD, r);
4289 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4290 CHECK_NULL);
4291 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4292 CHECK_NULL);
4293 names_h->obj_at_put(0, name0());
4294 names_h->obj_at_put(1, name1());
4295 break;
4296 }
4297 case JAVA_THREAD_STATE_TIMED_WAITING : {
4298 assert(values_h->length() == 3 &&
4299 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4300 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4301 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4302 "Invalid threadStatus value");
4303 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4304 3, /* number of substates */
4305 CHECK_NULL);
4306 names_h = objArrayHandle(THREAD, r);
4307 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4308 CHECK_NULL);
4309 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4310 CHECK_NULL);
4311 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4312 CHECK_NULL);
4313 names_h->obj_at_put(0, name0());
4314 names_h->obj_at_put(1, name1());
4315 names_h->obj_at_put(2, name2());
4316 break;
4317 }
4318 case JAVA_THREAD_STATE_TERMINATED : {
4319 assert(values_h->length() == 1 &&
4320 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4321 "Invalid threadStatus value");
4322 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4323 1, /* only 1 substate */
4324 CHECK_NULL);
4325 names_h = objArrayHandle(THREAD, r);
4326 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4327 names_h->obj_at_put(0, name());
4328 break;
4329 }
4330 default:
4331 // Unknown state - probably incompatible JDK version
4332 return NULL;
4333 }
4334 return (jobjectArray) JNIHandles::make_local(env, names_h());
4335 }
4336 JVM_END
4337
4338 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4339 {
4340 memset(info, 0, info_size);
4341
4342 info->jvm_version = Abstract_VM_Version::jvm_version();
4343 info->update_version = 0; /* 0 in HotSpot Express VM */
4344 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4345
4346 // when we add a new capability in the jvm_version_info struct, we should also
4347 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4348 // counter defined in runtimeService.cpp.
4349 info->is_attachable = AttachListener::is_attach_supported();
4350 }
4351 JVM_END