1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #if INCLUDE_CDS
32 #include "classfile/sharedClassUtil.hpp"
33 #include "classfile/systemDictionaryShared.hpp"
34 #endif
35 #include "classfile/vmSymbols.hpp"
36 #include "gc_interface/collectedHeap.inline.hpp"
37 #include "interpreter/bytecode.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/fieldStreams.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/method.hpp"
44 #include "prims/jvm.h"
45 #include "prims/jvm_misc.hpp"
46 #include "prims/jvmtiExport.hpp"
47 #include "prims/jvmtiThreadState.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "prims/privilegedStack.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/atomic.inline.hpp"
52 #include "runtime/dtraceJSDT.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/jfieldIDWorkaround.hpp"
59 #include "runtime/orderAccess.inline.hpp"
60 #include "runtime/os.inline.hpp"
61 #include "runtime/perfData.hpp"
62 #include "runtime/reflection.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/vframe.hpp"
65 #include "runtime/vm_operations.hpp"
66 #include "runtime/vm_version.hpp"
67 #include "services/attachListener.hpp"
68 #include "services/management.hpp"
69 #include "services/threadService.hpp"
70 #include "trace/tracing.hpp"
71 #include "utilities/copy.hpp"
72 #include "utilities/defaultStream.hpp"
73 #include "utilities/dtrace.hpp"
74 #include "utilities/events.hpp"
75 #include "utilities/histogram.hpp"
76 #include "utilities/top.hpp"
77 #include "utilities/utf8.hpp"
78 #ifdef TARGET_OS_FAMILY_linux
79 # include "jvm_linux.h"
80 #endif
81 #ifdef TARGET_OS_FAMILY_solaris
82 # include "jvm_solaris.h"
83 #endif
84 #ifdef TARGET_OS_FAMILY_windows
85 # include "jvm_windows.h"
86 #endif
87 #ifdef TARGET_OS_FAMILY_aix
88 # include "jvm_aix.h"
89 #endif
90 #ifdef TARGET_OS_FAMILY_bsd
91 # include "jvm_bsd.h"
92 #endif
93
94 #include <errno.h>
95
96 /*
97 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
98 such ctors and calls MUST NOT come between an oop declaration/init and its
99 usage because if objects are move this may cause various memory stomps, bus
100 errors and segfaults. Here is a cookbook for causing so called "naked oop
101 failures":
102
103 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
104 JVMWrapper("JVM_GetClassDeclaredFields");
105
106 // Object address to be held directly in mirror & not visible to GC
107 oop mirror = JNIHandles::resolve_non_null(ofClass);
108
109 // If this ctor can hit a safepoint, moving objects around, then
110 ComplexConstructor foo;
111
112 // Boom! mirror may point to JUNK instead of the intended object
113 (some dereference of mirror)
114
115 // Here's another call that may block for GC, making mirror stale
116 MutexLocker ml(some_lock);
117
118 // And here's an initializer that can result in a stale oop
119 // all in one step.
120 oop o = call_that_can_throw_exception(TRAPS);
121
122
123 The solution is to keep the oop declaration BELOW the ctor or function
124 call that might cause a GC, do another resolve to reassign the oop, or
125 consider use of a Handle instead of an oop so there is immunity from object
126 motion. But note that the "QUICK" entries below do not have a handlemark
127 and thus can only support use of handles passed in.
128 */
129
130 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
131 ResourceMark rm;
132 int line_number = -1;
133 const char * source_file = NULL;
134 const char * trace = "explicit";
135 InstanceKlass* caller = NULL;
136 JavaThread* jthread = JavaThread::current();
137 if (jthread->has_last_Java_frame()) {
138 vframeStream vfst(jthread);
139
140 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
141 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
142 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
143 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
144 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
145
146 Method* last_caller = NULL;
147
148 while (!vfst.at_end()) {
149 Method* m = vfst.method();
150 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
151 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
152 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
153 break;
154 }
155 last_caller = m;
156 vfst.next();
157 }
158 // if this is called from Class.forName0 and that is called from Class.forName,
159 // then print the caller of Class.forName. If this is Class.loadClass, then print
160 // that caller, otherwise keep quiet since this should be picked up elsewhere.
161 bool found_it = false;
162 if (!vfst.at_end() &&
163 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
164 vfst.method()->name() == vmSymbols::forName0_name()) {
165 vfst.next();
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName_name()) {
169 vfst.next();
170 found_it = true;
171 }
172 } else if (last_caller != NULL &&
173 last_caller->method_holder()->name() ==
174 vmSymbols::java_lang_ClassLoader() &&
175 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
176 last_caller->name() == vmSymbols::loadClass_name())) {
177 found_it = true;
178 } else if (!vfst.at_end()) {
179 if (vfst.method()->is_native()) {
180 // JNI call
181 found_it = true;
182 }
183 }
184 if (found_it && !vfst.at_end()) {
185 // found the caller
186 caller = vfst.method()->method_holder();
187 line_number = vfst.method()->line_number_from_bci(vfst.bci());
188 if (line_number == -1) {
189 // show method name if it's a native method
190 trace = vfst.method()->name_and_sig_as_C_string();
191 }
192 Symbol* s = caller->source_file_name();
193 if (s != NULL) {
194 source_file = s->as_C_string();
195 }
196 }
197 }
198 if (caller != NULL) {
199 if (to_class != caller) {
200 const char * from = caller->external_name();
201 const char * to = to_class->external_name();
202 // print in a single call to reduce interleaving between threads
203 if (source_file != NULL) {
204 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
205 } else {
206 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
207 }
208 }
209 }
210 }
211
212 void trace_class_resolution(Klass* to_class) {
213 EXCEPTION_MARK;
214 trace_class_resolution_impl(to_class, THREAD);
215 if (HAS_PENDING_EXCEPTION) {
216 CLEAR_PENDING_EXCEPTION;
217 }
218 }
219
220 // Wrapper to trace JVM functions
221
222 #ifdef ASSERT
223 class JVMTraceWrapper : public StackObj {
224 public:
225 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
226 if (TraceJVMCalls) {
227 va_list ap;
228 va_start(ap, format);
229 tty->print("JVM ");
230 tty->vprint_cr(format, ap);
231 va_end(ap);
232 }
233 }
234 };
235
236 Histogram* JVMHistogram;
237 volatile jint JVMHistogram_lock = 0;
238
239 class JVMHistogramElement : public HistogramElement {
240 public:
241 JVMHistogramElement(const char* name);
242 };
243
244 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
245 _name = elementName;
246 uintx count = 0;
247
248 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
249 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
250 count +=1;
251 if ( (WarnOnStalledSpinLock > 0)
252 && (count % WarnOnStalledSpinLock == 0)) {
253 warning("JVMHistogram_lock seems to be stalled");
254 }
255 }
256 }
257
258 if(JVMHistogram == NULL)
259 JVMHistogram = new Histogram("JVM Call Counts",100);
260
261 JVMHistogram->add_element(this);
262 Atomic::dec(&JVMHistogram_lock);
263 }
264
265 #define JVMCountWrapper(arg) \
266 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
267 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
268
269 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
270 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
271 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
272 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
273 #else
274 #define JVMWrapper(arg1)
275 #define JVMWrapper2(arg1, arg2)
276 #define JVMWrapper3(arg1, arg2, arg3)
277 #define JVMWrapper4(arg1, arg2, arg3, arg4)
278 #endif
279
280
281 // Interface version /////////////////////////////////////////////////////////////////////
282
283
284 JVM_LEAF(jint, JVM_GetInterfaceVersion())
285 return JVM_INTERFACE_VERSION;
286 JVM_END
287
288
289 // java.lang.System //////////////////////////////////////////////////////////////////////
290
291
292 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
293 JVMWrapper("JVM_CurrentTimeMillis");
294 return os::javaTimeMillis();
295 JVM_END
296
297 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
298 JVMWrapper("JVM_NanoTime");
299 return os::javaTimeNanos();
300 JVM_END
301
302
303 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
304 jobject dst, jint dst_pos, jint length))
305 JVMWrapper("JVM_ArrayCopy");
306 // Check if we have null pointers
307 if (src == NULL || dst == NULL) {
308 THROW(vmSymbols::java_lang_NullPointerException());
309 }
310 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
311 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
312 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
313 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
314 // Do copy
315 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
316 JVM_END
317
318
319 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
320 JavaValue r(T_OBJECT);
321 // public synchronized Object put(Object key, Object value);
322 HandleMark hm(THREAD);
323 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
324 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
325 JavaCalls::call_virtual(&r,
326 props,
327 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
328 vmSymbols::put_name(),
329 vmSymbols::object_object_object_signature(),
330 key_str,
331 value_str,
332 THREAD);
333 }
334
335
336 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
337
338
339 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
340 JVMWrapper("JVM_InitProperties");
341 ResourceMark rm;
342
343 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
344
345 // System property list includes both user set via -D option and
346 // jvm system specific properties.
347 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
348 PUTPROP(props, p->key(), p->value());
349 }
350
351 // Convert the -XX:MaxDirectMemorySize= command line flag
352 // to the sun.nio.MaxDirectMemorySize property.
353 // Do this after setting user properties to prevent people
354 // from setting the value with a -D option, as requested.
355 {
356 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
357 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
358 } else {
359 char as_chars[256];
360 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
361 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
362 }
363 }
364
365 // JVM monitoring and management support
366 // Add the sun.management.compiler property for the compiler's name
367 {
368 #undef CSIZE
369 #if defined(_LP64) || defined(_WIN64)
370 #define CSIZE "64-Bit "
371 #else
372 #define CSIZE
373 #endif // 64bit
374
375 #ifdef TIERED
376 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
377 #else
378 #if defined(COMPILER1)
379 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
380 #elif defined(COMPILER2)
381 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
382 #else
383 const char* compiler_name = "";
384 #endif // compilers
385 #endif // TIERED
386
387 if (*compiler_name != '\0' &&
388 (Arguments::mode() != Arguments::_int)) {
389 PUTPROP(props, "sun.management.compiler", compiler_name);
390 }
391 }
392
393 return properties;
394 JVM_END
395
396
397 /*
398 * Return the temporary directory that the VM uses for the attach
399 * and perf data files.
400 *
401 * It is important that this directory is well-known and the
402 * same for all VM instances. It cannot be affected by configuration
403 * variables such as java.io.tmpdir.
404 */
405 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
406 JVMWrapper("JVM_GetTemporaryDirectory");
407 HandleMark hm(THREAD);
408 const char* temp_dir = os::get_temp_directory();
409 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
410 return (jstring) JNIHandles::make_local(env, h());
411 JVM_END
412
413
414 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
415
416 extern volatile jint vm_created;
417
418 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
419 if (vm_created != 0 && (code == 0)) {
420 // The VM is about to exit. We call back into Java to check whether finalizers should be run
421 Universe::run_finalizers_on_exit();
422 }
423 before_exit(thread);
424 vm_exit(code);
425 JVM_END
426
427
428 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
429 before_exit(thread);
430 vm_exit(code);
431 JVM_END
432
433
434 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
435 register_on_exit_function(func);
436 JVM_END
437
438
439 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
440 JVMWrapper("JVM_GC");
441 if (!DisableExplicitGC) {
442 Universe::heap()->collect(GCCause::_java_lang_system_gc);
443 }
444 JVM_END
445
446
447 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
448 JVMWrapper("JVM_MaxObjectInspectionAge");
449 return Universe::heap()->millis_since_last_gc();
450 JVM_END
451
452
453 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
454 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
455 JVM_END
456
457
458 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
459 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
460 JVM_END
461
462 static inline jlong convert_size_t_to_jlong(size_t val) {
463 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
464 NOT_LP64 (return (jlong)val;)
465 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
466 }
467
468 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
469 JVMWrapper("JVM_TotalMemory");
470 size_t n = Universe::heap()->capacity();
471 return convert_size_t_to_jlong(n);
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
476 JVMWrapper("JVM_FreeMemory");
477 CollectedHeap* ch = Universe::heap();
478 size_t n;
479 {
480 MutexLocker x(Heap_lock);
481 n = ch->capacity() - ch->used();
482 }
483 return convert_size_t_to_jlong(n);
484 JVM_END
485
486
487 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
488 JVMWrapper("JVM_MaxMemory");
489 size_t n = Universe::heap()->max_capacity();
490 return convert_size_t_to_jlong(n);
491 JVM_END
492
493
494 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
495 JVMWrapper("JVM_ActiveProcessorCount");
496 return os::active_processor_count();
497 JVM_END
498
499
500
501 // java.lang.Throwable //////////////////////////////////////////////////////
502
503
504 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
505 JVMWrapper("JVM_FillInStackTrace");
506 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
507 java_lang_Throwable::fill_in_stack_trace(exception);
508 JVM_END
509
510
511 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
512 JVMWrapper("JVM_GetStackTraceDepth");
513 oop exception = JNIHandles::resolve(throwable);
514 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
515 JVM_END
516
517
518 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
519 JVMWrapper("JVM_GetStackTraceElement");
520 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
521 oop exception = JNIHandles::resolve(throwable);
522 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
523 return JNIHandles::make_local(env, element);
524 JVM_END
525
526
527 // java.lang.Object ///////////////////////////////////////////////
528
529
530 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
531 JVMWrapper("JVM_IHashCode");
532 // as implemented in the classic virtual machine; return 0 if object is NULL
533 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
534 JVM_END
535
536
537 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
538 JVMWrapper("JVM_MonitorWait");
539 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
540 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
541 if (JvmtiExport::should_post_monitor_wait()) {
542 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
543
544 // The current thread already owns the monitor and it has not yet
545 // been added to the wait queue so the current thread cannot be
546 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
547 // event handler cannot accidentally consume an unpark() meant for
548 // the ParkEvent associated with this ObjectMonitor.
549 }
550 ObjectSynchronizer::wait(obj, ms, CHECK);
551 JVM_END
552
553
554 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
555 JVMWrapper("JVM_MonitorNotify");
556 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
557 ObjectSynchronizer::notify(obj, CHECK);
558 JVM_END
559
560
561 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
562 JVMWrapper("JVM_MonitorNotifyAll");
563 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
564 ObjectSynchronizer::notifyall(obj, CHECK);
565 JVM_END
566
567
568 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
569 JVMWrapper("JVM_Clone");
570 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
571 const KlassHandle klass (THREAD, obj->klass());
572 JvmtiVMObjectAllocEventCollector oam;
573
574 #ifdef ASSERT
575 // Just checking that the cloneable flag is set correct
576 if (obj->is_array()) {
577 guarantee(klass->is_cloneable(), "all arrays are cloneable");
578 } else {
579 guarantee(obj->is_instance(), "should be instanceOop");
580 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
581 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
582 }
583 #endif
584
585 // Check if class of obj supports the Cloneable interface.
586 // All arrays are considered to be cloneable (See JLS 20.1.5)
587 if (!klass->is_cloneable()) {
588 ResourceMark rm(THREAD);
589 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
590 }
591
592 // Make shallow object copy
593 const int size = obj->size();
594 oop new_obj = NULL;
595 if (obj->is_array()) {
596 const int length = ((arrayOop)obj())->length();
597 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
598 } else {
599 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
600 }
601 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
602 // is modifying a reference field in the clonee, a non-oop-atomic copy might
603 // be suspended in the middle of copying the pointer and end up with parts
604 // of two different pointers in the field. Subsequent dereferences will crash.
605 // 4846409: an oop-copy of objects with long or double fields or arrays of same
606 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
607 // of oops. We know objects are aligned on a minimum of an jlong boundary.
608 // The same is true of StubRoutines::object_copy and the various oop_copy
609 // variants, and of the code generated by the inline_native_clone intrinsic.
610 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
611 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
612 (size_t)align_object_size(size) / HeapWordsPerLong);
613 // Clear the header
614 new_obj->init_mark();
615
616 // Store check (mark entire object and let gc sort it out)
617 BarrierSet* bs = Universe::heap()->barrier_set();
618 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
619 bs->write_region(MemRegion((HeapWord*)new_obj, size));
620
621 // Caution: this involves a java upcall, so the clone should be
622 // "gc-robust" by this stage.
623 if (klass->has_finalizer()) {
624 assert(obj->is_instance(), "should be instanceOop");
625 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
626 }
627
628 return JNIHandles::make_local(env, oop(new_obj));
629 JVM_END
630
631 // java.lang.Compiler ////////////////////////////////////////////////////
632
633 // The initial cuts of the HotSpot VM will not support JITs, and all existing
634 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
635 // functions are all silently ignored unless JVM warnings are printed.
636
637 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
639 JVM_END
640
641
642 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
644 return JNI_FALSE;
645 JVM_END
646
647
648 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
649 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
650 return JNI_FALSE;
651 JVM_END
652
653
654 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
655 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
656 return JNI_FALSE;
657 JVM_END
658
659
660 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
661 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
662 return NULL;
663 JVM_END
664
665
666 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
667 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
668 JVM_END
669
670
671 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
672 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
673 JVM_END
674
675
676
677 // Error message support //////////////////////////////////////////////////////
678
679 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
680 JVMWrapper("JVM_GetLastErrorString");
681 return (jint)os::lasterror(buf, len);
682 JVM_END
683
684
685 // java.io.File ///////////////////////////////////////////////////////////////
686
687 JVM_LEAF(char*, JVM_NativePath(char* path))
688 JVMWrapper2("JVM_NativePath (%s)", path);
689 return os::native_path(path);
690 JVM_END
691
692
693 // Misc. class handling ///////////////////////////////////////////////////////////
694
695
696 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
697 JVMWrapper("JVM_GetCallerClass");
698
699 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
700 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
701 // temporarily for existing code to use until a replacement API is defined.
702 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
703 Klass* k = thread->security_get_caller_class(depth);
704 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
705 }
706
707 // Getting the class of the caller frame.
708 //
709 // The call stack at this point looks something like this:
710 //
711 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
712 // [1] [ @CallerSensitive API.method ]
713 // [.] [ (skipped intermediate frames) ]
714 // [n] [ caller ]
715 vframeStream vfst(thread);
716 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
717 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
718 Method* m = vfst.method();
719 assert(m != NULL, "sanity");
720 switch (n) {
721 case 0:
722 // This must only be called from Reflection.getCallerClass
723 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
724 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
725 }
726 // fall-through
727 case 1:
728 // Frame 0 and 1 must be caller sensitive.
729 if (!m->caller_sensitive()) {
730 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
731 }
732 break;
733 default:
734 if (!m->is_ignored_by_security_stack_walk()) {
735 // We have reached the desired frame; return the holder class.
736 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
737 }
738 break;
739 }
740 }
741 return NULL;
742 JVM_END
743
744
745 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
746 JVMWrapper("JVM_FindPrimitiveClass");
747 oop mirror = NULL;
748 BasicType t = name2type(utf);
749 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
750 mirror = Universe::java_mirror(t);
751 }
752 if (mirror == NULL) {
753 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
754 } else {
755 return (jclass) JNIHandles::make_local(env, mirror);
756 }
757 JVM_END
758
759
760 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
761 JVMWrapper("JVM_ResolveClass");
762 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
763 JVM_END
764
765
766 // Returns a class loaded by the bootstrap class loader; or null
767 // if not found. ClassNotFoundException is not thrown.
768 //
769 // Rationale behind JVM_FindClassFromBootLoader
770 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
771 // b> because of (a) java.dll has a direct dependecy on the unexported
772 // private symbol "_JVM_FindClassFromClassLoader@20".
773 // c> the launcher cannot use the private symbol as it dynamically opens
774 // the entry point, so if something changes, the launcher will fail
775 // unexpectedly at runtime, it is safest for the launcher to dlopen a
776 // stable exported interface.
777 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
778 // signature to change from _JVM_FindClassFromClassLoader@20 to
779 // JVM_FindClassFromClassLoader and will not be backward compatible
780 // with older JDKs.
781 // Thus a public/stable exported entry point is the right solution,
782 // public here means public in linker semantics, and is exported only
783 // to the JDK, and is not intended to be a public API.
784
785 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
786 const char* name))
787 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
788
789 // Java libraries should ensure that name is never null...
790 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
791 // It's impossible to create this class; the name cannot fit
792 // into the constant pool.
793 return NULL;
794 }
795
796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
797 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
798 if (k == NULL) {
799 return NULL;
800 }
801
802 if (TraceClassResolution) {
803 trace_class_resolution(k);
804 }
805 return (jclass) JNIHandles::make_local(env, k->java_mirror());
806 JVM_END
807
808 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
809 jboolean init, jobject loader,
810 jboolean throwError))
811 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
812 throwError ? "error" : "exception");
813 // Java libraries should ensure that name is never null...
814 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
815 // It's impossible to create this class; the name cannot fit
816 // into the constant pool.
817 if (throwError) {
818 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
819 } else {
820 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
821 }
822 }
823 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
824 Handle h_loader(THREAD, JNIHandles::resolve(loader));
825 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
826 Handle(), throwError, THREAD);
827
828 if (TraceClassResolution && result != NULL) {
829 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
830 }
831 return result;
832 JVM_END
833
834
835 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
836 jboolean init, jclass from))
837 JVMWrapper2("JVM_FindClassFromClass %s", name);
838 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
839 // It's impossible to create this class; the name cannot fit
840 // into the constant pool.
841 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
842 }
843 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
844 oop from_class_oop = JNIHandles::resolve(from);
845 Klass* from_class = (from_class_oop == NULL)
846 ? (Klass*)NULL
847 : java_lang_Class::as_Klass(from_class_oop);
848 oop class_loader = NULL;
849 oop protection_domain = NULL;
850 if (from_class != NULL) {
851 class_loader = from_class->class_loader();
852 protection_domain = from_class->protection_domain();
853 }
854 Handle h_loader(THREAD, class_loader);
855 Handle h_prot (THREAD, protection_domain);
856 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
857 h_prot, true, thread);
858
859 if (TraceClassResolution && result != NULL) {
860 // this function is generally only used for class loading during verification.
861 ResourceMark rm;
862 oop from_mirror = JNIHandles::resolve_non_null(from);
863 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
864 const char * from_name = from_class->external_name();
865
866 oop mirror = JNIHandles::resolve_non_null(result);
867 Klass* to_class = java_lang_Class::as_Klass(mirror);
868 const char * to = to_class->external_name();
869 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
870 }
871
872 return result;
873 JVM_END
874
875 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
876 if (loader.is_null()) {
877 return;
878 }
879
880 // check whether the current caller thread holds the lock or not.
881 // If not, increment the corresponding counter
882 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
883 ObjectSynchronizer::owner_self) {
884 counter->inc();
885 }
886 }
887
888 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
889 // and JVM_DefineClassWithSourceCond()
890 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
891 jobject loader, const jbyte *buf,
892 jsize len, jobject pd, const char *source,
893 jboolean verify, TRAPS) {
894 if (source == NULL) source = "__JVM_DefineClass__";
895
896 assert(THREAD->is_Java_thread(), "must be a JavaThread");
897 JavaThread* jt = (JavaThread*) THREAD;
898
899 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
900 ClassLoader::perf_define_appclass_selftime(),
901 ClassLoader::perf_define_appclasses(),
902 jt->get_thread_stat()->perf_recursion_counts_addr(),
903 jt->get_thread_stat()->perf_timers_addr(),
904 PerfClassTraceTime::DEFINE_CLASS);
905
906 if (UsePerfData) {
907 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
908 }
909
910 // Since exceptions can be thrown, class initialization can take place
911 // if name is NULL no check for class name in .class stream has to be made.
912 TempNewSymbol class_name = NULL;
913 if (name != NULL) {
914 const int str_len = (int)strlen(name);
915 if (str_len > Symbol::max_length()) {
916 // It's impossible to create this class; the name cannot fit
917 // into the constant pool.
918 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
919 }
920 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
921 }
922
923 ResourceMark rm(THREAD);
924 ClassFileStream st((u1*) buf, len, (char *)source);
925 Handle class_loader (THREAD, JNIHandles::resolve(loader));
926 if (UsePerfData) {
927 is_lock_held_by_thread(class_loader,
928 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
929 THREAD);
930 }
931 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
932 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
933 protection_domain, &st,
934 verify != 0,
935 CHECK_NULL);
936
937 if (TraceClassResolution && k != NULL) {
938 trace_class_resolution(k);
939 }
940
941 return (jclass) JNIHandles::make_local(env, k->java_mirror());
942 }
943
944
945 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
946 JVMWrapper2("JVM_DefineClass %s", name);
947
948 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
949 JVM_END
950
951
952 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
953 JVMWrapper2("JVM_DefineClassWithSource %s", name);
954
955 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
956 JVM_END
957
958 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
959 jobject loader, const jbyte *buf,
960 jsize len, jobject pd,
961 const char *source, jboolean verify))
962 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
963
964 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
965 JVM_END
966
967 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
968 JVMWrapper("JVM_FindLoadedClass");
969 ResourceMark rm(THREAD);
970
971 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
972 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
973
974 const char* str = java_lang_String::as_utf8_string(string());
975 // Sanity check, don't expect null
976 if (str == NULL) return NULL;
977
978 const int str_len = (int)strlen(str);
979 if (str_len > Symbol::max_length()) {
980 // It's impossible to create this class; the name cannot fit
981 // into the constant pool.
982 return NULL;
983 }
984 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
985
986 // Security Note:
987 // The Java level wrapper will perform the necessary security check allowing
988 // us to pass the NULL as the initiating class loader.
989 Handle h_loader(THREAD, JNIHandles::resolve(loader));
990 if (UsePerfData) {
991 is_lock_held_by_thread(h_loader,
992 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
993 THREAD);
994 }
995
996 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
997 h_loader,
998 Handle(),
999 CHECK_NULL);
1000 #if INCLUDE_CDS
1001 if (k == NULL) {
1002 // If the class is not already loaded, try to see if it's in the shared
1003 // archive for the current classloader (h_loader).
1004 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1005 klass_name, h_loader, CHECK_NULL);
1006 k = ik();
1007 }
1008 #endif
1009 return (k == NULL) ? NULL :
1010 (jclass) JNIHandles::make_local(env, k->java_mirror());
1011 JVM_END
1012
1013
1014 // Reflection support //////////////////////////////////////////////////////////////////////////////
1015
1016 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1017 assert (cls != NULL, "illegal class");
1018 JVMWrapper("JVM_GetClassName");
1019 JvmtiVMObjectAllocEventCollector oam;
1020 ResourceMark rm(THREAD);
1021 const char* name;
1022 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1023 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1024 } else {
1025 // Consider caching interned string in Klass
1026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1027 assert(k->is_klass(), "just checking");
1028 name = k->external_name();
1029 }
1030 oop result = StringTable::intern((char*) name, CHECK_NULL);
1031 return (jstring) JNIHandles::make_local(env, result);
1032 JVM_END
1033
1034
1035 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1036 JVMWrapper("JVM_GetClassInterfaces");
1037 JvmtiVMObjectAllocEventCollector oam;
1038 oop mirror = JNIHandles::resolve_non_null(cls);
1039
1040 // Special handling for primitive objects
1041 if (java_lang_Class::is_primitive(mirror)) {
1042 // Primitive objects does not have any interfaces
1043 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1044 return (jobjectArray) JNIHandles::make_local(env, r);
1045 }
1046
1047 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1048 // Figure size of result array
1049 int size;
1050 if (klass->oop_is_instance()) {
1051 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1052 } else {
1053 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1054 size = 2;
1055 }
1056
1057 // Allocate result array
1058 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1059 objArrayHandle result (THREAD, r);
1060 // Fill in result
1061 if (klass->oop_is_instance()) {
1062 // Regular instance klass, fill in all local interfaces
1063 for (int index = 0; index < size; index++) {
1064 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1065 result->obj_at_put(index, k->java_mirror());
1066 }
1067 } else {
1068 // All arrays implement java.lang.Cloneable and java.io.Serializable
1069 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1070 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1071 }
1072 return (jobjectArray) JNIHandles::make_local(env, result());
1073 JVM_END
1074
1075
1076 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1077 JVMWrapper("JVM_GetClassLoader");
1078 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1079 return NULL;
1080 }
1081 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1082 oop loader = k->class_loader();
1083 return JNIHandles::make_local(env, loader);
1084 JVM_END
1085
1086
1087 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1088 JVMWrapper("JVM_IsInterface");
1089 oop mirror = JNIHandles::resolve_non_null(cls);
1090 if (java_lang_Class::is_primitive(mirror)) {
1091 return JNI_FALSE;
1092 }
1093 Klass* k = java_lang_Class::as_Klass(mirror);
1094 jboolean result = k->is_interface();
1095 assert(!result || k->oop_is_instance(),
1096 "all interfaces are instance types");
1097 // The compiler intrinsic for isInterface tests the
1098 // Klass::_access_flags bits in the same way.
1099 return result;
1100 JVM_END
1101
1102
1103 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1104 JVMWrapper("JVM_GetClassSigners");
1105 JvmtiVMObjectAllocEventCollector oam;
1106 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1107 // There are no signers for primitive types
1108 return NULL;
1109 }
1110
1111 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1112
1113 // If there are no signers set in the class, or if the class
1114 // is an array, return NULL.
1115 if (signers == NULL) return NULL;
1116
1117 // copy of the signers array
1118 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1119 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1120 for (int index = 0; index < signers->length(); index++) {
1121 signers_copy->obj_at_put(index, signers->obj_at(index));
1122 }
1123
1124 // return the copy
1125 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1126 JVM_END
1127
1128
1129 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1130 JVMWrapper("JVM_SetClassSigners");
1131 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1132 // This call is ignored for primitive types and arrays.
1133 // Signers are only set once, ClassLoader.java, and thus shouldn't
1134 // be called with an array. Only the bootstrap loader creates arrays.
1135 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1136 if (k->oop_is_instance()) {
1137 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1138 }
1139 }
1140 JVM_END
1141
1142
1143 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1144 JVMWrapper("JVM_GetProtectionDomain");
1145 if (JNIHandles::resolve(cls) == NULL) {
1146 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1147 }
1148
1149 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1150 // Primitive types does not have a protection domain.
1151 return NULL;
1152 }
1153
1154 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1155 return (jobject) JNIHandles::make_local(env, pd);
1156 JVM_END
1157
1158
1159 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1160 // If there is a security manager and protection domain, check the access
1161 // in the protection domain, otherwise it is authorized.
1162 if (java_lang_System::has_security_manager()) {
1163
1164 // For bootstrapping, if pd implies method isn't in the JDK, allow
1165 // this context to revert to older behavior.
1166 // In this case the isAuthorized field in AccessControlContext is also not
1167 // present.
1168 if (Universe::protection_domain_implies_method() == NULL) {
1169 return true;
1170 }
1171
1172 // Whitelist certain access control contexts
1173 if (java_security_AccessControlContext::is_authorized(context)) {
1174 return true;
1175 }
1176
1177 oop prot = klass->protection_domain();
1178 if (prot != NULL) {
1179 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1180 // in the new wrapper.
1181 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1182 Handle h_prot(THREAD, prot);
1183 JavaValue result(T_BOOLEAN);
1184 JavaCallArguments args(h_prot);
1185 JavaCalls::call(&result, m, &args, CHECK_false);
1186 return (result.get_jboolean() != 0);
1187 }
1188 }
1189 return true;
1190 }
1191
1192 // Create an AccessControlContext with a protection domain with null codesource
1193 // and null permissions - which gives no permissions.
1194 oop create_dummy_access_control_context(TRAPS) {
1195 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1196 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1197 // Call constructor ProtectionDomain(null, null);
1198 JavaValue result(T_VOID);
1199 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1200 vmSymbols::object_initializer_name(),
1201 vmSymbols::codesource_permissioncollection_signature(),
1202 Handle(), Handle(), CHECK_NULL);
1203
1204 // new ProtectionDomain[] {pd};
1205 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1206 context->obj_at_put(0, obj());
1207
1208 // new AccessControlContext(new ProtectionDomain[] {pd})
1209 objArrayHandle h_context(THREAD, context);
1210 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1211 return acc;
1212 }
1213
1214 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1215 JVMWrapper("JVM_DoPrivileged");
1216
1217 if (action == NULL) {
1218 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1219 }
1220
1221 // Compute the frame initiating the do privileged operation and setup the privileged stack
1222 vframeStream vfst(thread);
1223 vfst.security_get_caller_frame(1);
1224
1225 if (vfst.at_end()) {
1226 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1227 }
1228
1229 Method* method = vfst.method();
1230 instanceKlassHandle klass (THREAD, method->method_holder());
1231
1232 // Check that action object understands "Object run()"
1233 Handle h_context;
1234 if (context != NULL) {
1235 h_context = Handle(THREAD, JNIHandles::resolve(context));
1236 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1237 if (!authorized) {
1238 // Create an unprivileged access control object and call it's run function
1239 // instead.
1240 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1241 h_context = Handle(THREAD, noprivs);
1242 }
1243 }
1244
1245 // Check that action object understands "Object run()"
1246 Handle object (THREAD, JNIHandles::resolve(action));
1247
1248 // get run() method
1249 Method* m_oop = object->klass()->uncached_lookup_method(
1250 vmSymbols::run_method_name(),
1251 vmSymbols::void_object_signature(),
1252 Klass::normal);
1253 methodHandle m (THREAD, m_oop);
1254 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1255 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1256 }
1257
1258 // Stack allocated list of privileged stack elements
1259 PrivilegedElement pi;
1260 if (!vfst.at_end()) {
1261 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1262 thread->set_privileged_stack_top(&pi);
1263 }
1264
1265
1266 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1267 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1268 Handle pending_exception;
1269 JavaValue result(T_OBJECT);
1270 JavaCallArguments args(object);
1271 JavaCalls::call(&result, m, &args, THREAD);
1272
1273 // done with action, remove ourselves from the list
1274 if (!vfst.at_end()) {
1275 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1276 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1277 }
1278
1279 if (HAS_PENDING_EXCEPTION) {
1280 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1281 CLEAR_PENDING_EXCEPTION;
1282 // JVMTI has already reported the pending exception
1283 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1284 if (THREAD->is_Java_thread()) {
1285 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1286 }
1287 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1288 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1289 // Throw a java.security.PrivilegedActionException(Exception e) exception
1290 JavaCallArguments args(pending_exception);
1291 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1292 vmSymbols::exception_void_signature(),
1293 &args);
1294 }
1295 }
1296
1297 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1298 return JNIHandles::make_local(env, (oop) result.get_jobject());
1299 JVM_END
1300
1301
1302 // Returns the inherited_access_control_context field of the running thread.
1303 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1304 JVMWrapper("JVM_GetInheritedAccessControlContext");
1305 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1306 return JNIHandles::make_local(env, result);
1307 JVM_END
1308
1309 class RegisterArrayForGC {
1310 private:
1311 JavaThread *_thread;
1312 public:
1313 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1314 _thread = thread;
1315 _thread->register_array_for_gc(array);
1316 }
1317
1318 ~RegisterArrayForGC() {
1319 _thread->register_array_for_gc(NULL);
1320 }
1321 };
1322
1323
1324 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1325 JVMWrapper("JVM_GetStackAccessControlContext");
1326 if (!UsePrivilegedStack) return NULL;
1327
1328 ResourceMark rm(THREAD);
1329 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1330 JvmtiVMObjectAllocEventCollector oam;
1331
1332 // count the protection domains on the execution stack. We collapse
1333 // duplicate consecutive protection domains into a single one, as
1334 // well as stopping when we hit a privileged frame.
1335
1336 // Use vframeStream to iterate through Java frames
1337 vframeStream vfst(thread);
1338
1339 oop previous_protection_domain = NULL;
1340 Handle privileged_context(thread, NULL);
1341 bool is_privileged = false;
1342 oop protection_domain = NULL;
1343
1344 for(; !vfst.at_end(); vfst.next()) {
1345 // get method of frame
1346 Method* method = vfst.method();
1347 intptr_t* frame_id = vfst.frame_id();
1348
1349 // check the privileged frames to see if we have a match
1350 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1351 // this frame is privileged
1352 is_privileged = true;
1353 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1354 protection_domain = thread->privileged_stack_top()->protection_domain();
1355 } else {
1356 protection_domain = method->method_holder()->protection_domain();
1357 }
1358
1359 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1360 local_array->push(protection_domain);
1361 previous_protection_domain = protection_domain;
1362 }
1363
1364 if (is_privileged) break;
1365 }
1366
1367
1368 // either all the domains on the stack were system domains, or
1369 // we had a privileged system domain
1370 if (local_array->is_empty()) {
1371 if (is_privileged && privileged_context.is_null()) return NULL;
1372
1373 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1374 return JNIHandles::make_local(env, result);
1375 }
1376
1377 // the resource area must be registered in case of a gc
1378 RegisterArrayForGC ragc(thread, local_array);
1379 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1380 local_array->length(), CHECK_NULL);
1381 objArrayHandle h_context(thread, context);
1382 for (int index = 0; index < local_array->length(); index++) {
1383 h_context->obj_at_put(index, local_array->at(index));
1384 }
1385
1386 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1387
1388 return JNIHandles::make_local(env, result);
1389 JVM_END
1390
1391
1392 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1393 JVMWrapper("JVM_IsArrayClass");
1394 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1395 return (k != NULL) && k->oop_is_array() ? true : false;
1396 JVM_END
1397
1398
1399 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1400 JVMWrapper("JVM_IsPrimitiveClass");
1401 oop mirror = JNIHandles::resolve_non_null(cls);
1402 return (jboolean) java_lang_Class::is_primitive(mirror);
1403 JVM_END
1404
1405
1406 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1407 JVMWrapper("JVM_GetComponentType");
1408 oop mirror = JNIHandles::resolve_non_null(cls);
1409 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1410 return (jclass) JNIHandles::make_local(env, result);
1411 JVM_END
1412
1413
1414 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1415 JVMWrapper("JVM_GetClassModifiers");
1416 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1417 // Primitive type
1418 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1419 }
1420
1421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1422 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1423 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1424 return k->modifier_flags();
1425 JVM_END
1426
1427
1428 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1429
1430 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1431 JvmtiVMObjectAllocEventCollector oam;
1432 // ofClass is a reference to a java_lang_Class object. The mirror object
1433 // of an InstanceKlass
1434
1435 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1436 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1437 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1438 return (jobjectArray)JNIHandles::make_local(env, result);
1439 }
1440
1441 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1442 InnerClassesIterator iter(k);
1443
1444 if (iter.length() == 0) {
1445 // Neither an inner nor outer class
1446 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1447 return (jobjectArray)JNIHandles::make_local(env, result);
1448 }
1449
1450 // find inner class info
1451 constantPoolHandle cp(thread, k->constants());
1452 int length = iter.length();
1453
1454 // Allocate temp. result array
1455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1456 objArrayHandle result (THREAD, r);
1457 int members = 0;
1458
1459 for (; !iter.done(); iter.next()) {
1460 int ioff = iter.inner_class_info_index();
1461 int ooff = iter.outer_class_info_index();
1462
1463 if (ioff != 0 && ooff != 0) {
1464 // Check to see if the name matches the class we're looking for
1465 // before attempting to find the class.
1466 if (cp->klass_name_at_matches(k, ooff)) {
1467 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1468 if (outer_klass == k()) {
1469 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1470 instanceKlassHandle inner_klass (THREAD, ik);
1471
1472 // Throws an exception if outer klass has not declared k as
1473 // an inner klass
1474 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1475
1476 result->obj_at_put(members, inner_klass->java_mirror());
1477 members++;
1478 }
1479 }
1480 }
1481 }
1482
1483 if (members != length) {
1484 // Return array of right length
1485 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1486 for(int i = 0; i < members; i++) {
1487 res->obj_at_put(i, result->obj_at(i));
1488 }
1489 return (jobjectArray)JNIHandles::make_local(env, res);
1490 }
1491
1492 return (jobjectArray)JNIHandles::make_local(env, result());
1493 JVM_END
1494
1495
1496 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1497 {
1498 // ofClass is a reference to a java_lang_Class object.
1499 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1500 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1501 return NULL;
1502 }
1503
1504 bool inner_is_member = false;
1505 Klass* outer_klass
1506 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1507 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1508 if (outer_klass == NULL) return NULL; // already a top-level class
1509 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1510 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1511 }
1512 JVM_END
1513
1514 // should be in InstanceKlass.cpp, but is here for historical reasons
1515 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1516 bool* inner_is_member,
1517 TRAPS) {
1518 Thread* thread = THREAD;
1519 InnerClassesIterator iter(k);
1520 if (iter.length() == 0) {
1521 // No inner class info => no declaring class
1522 return NULL;
1523 }
1524
1525 constantPoolHandle i_cp(thread, k->constants());
1526
1527 bool found = false;
1528 Klass* ok;
1529 instanceKlassHandle outer_klass;
1530 *inner_is_member = false;
1531
1532 // Find inner_klass attribute
1533 for (; !iter.done() && !found; iter.next()) {
1534 int ioff = iter.inner_class_info_index();
1535 int ooff = iter.outer_class_info_index();
1536 int noff = iter.inner_name_index();
1537 if (ioff != 0) {
1538 // Check to see if the name matches the class we're looking for
1539 // before attempting to find the class.
1540 if (i_cp->klass_name_at_matches(k, ioff)) {
1541 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1542 found = (k() == inner_klass);
1543 if (found && ooff != 0) {
1544 ok = i_cp->klass_at(ooff, CHECK_NULL);
1545 outer_klass = instanceKlassHandle(thread, ok);
1546 *inner_is_member = true;
1547 }
1548 }
1549 }
1550 }
1551
1552 if (found && outer_klass.is_null()) {
1553 // It may be anonymous; try for that.
1554 int encl_method_class_idx = k->enclosing_method_class_index();
1555 if (encl_method_class_idx != 0) {
1556 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1557 outer_klass = instanceKlassHandle(thread, ok);
1558 *inner_is_member = false;
1559 }
1560 }
1561
1562 // If no inner class attribute found for this class.
1563 if (outer_klass.is_null()) return NULL;
1564
1565 // Throws an exception if outer klass has not declared k as an inner klass
1566 // We need evidence that each klass knows about the other, or else
1567 // the system could allow a spoof of an inner class to gain access rights.
1568 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1569 return outer_klass();
1570 }
1571
1572 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1573 assert (cls != NULL, "illegal class");
1574 JVMWrapper("JVM_GetClassSignature");
1575 JvmtiVMObjectAllocEventCollector oam;
1576 ResourceMark rm(THREAD);
1577 // Return null for arrays and primatives
1578 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1579 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1580 if (k->oop_is_instance()) {
1581 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1582 if (sym == NULL) return NULL;
1583 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1584 return (jstring) JNIHandles::make_local(env, str());
1585 }
1586 }
1587 return NULL;
1588 JVM_END
1589
1590
1591 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1592 assert (cls != NULL, "illegal class");
1593 JVMWrapper("JVM_GetClassAnnotations");
1594
1595 // Return null for arrays and primitives
1596 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1597 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1598 if (k->oop_is_instance()) {
1599 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1600 return (jbyteArray) JNIHandles::make_local(env, a);
1601 }
1602 }
1603 return NULL;
1604 JVM_END
1605
1606
1607 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1608 // some of this code was adapted from from jni_FromReflectedField
1609
1610 oop reflected = JNIHandles::resolve_non_null(field);
1611 oop mirror = java_lang_reflect_Field::clazz(reflected);
1612 Klass* k = java_lang_Class::as_Klass(mirror);
1613 int slot = java_lang_reflect_Field::slot(reflected);
1614 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1615
1616 KlassHandle kh(THREAD, k);
1617 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1618
1619 if (modifiers & JVM_ACC_STATIC) {
1620 // for static fields we only look in the current class
1621 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1622 assert(false, "cannot find static field");
1623 return false;
1624 }
1625 } else {
1626 // for instance fields we start with the current class and work
1627 // our way up through the superclass chain
1628 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1629 assert(false, "cannot find instance field");
1630 return false;
1631 }
1632 }
1633 return true;
1634 }
1635
1636 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1637 // field is a handle to a java.lang.reflect.Field object
1638 assert(field != NULL, "illegal field");
1639 JVMWrapper("JVM_GetFieldAnnotations");
1640
1641 fieldDescriptor fd;
1642 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1643 if (!gotFd) {
1644 return NULL;
1645 }
1646
1647 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1648 JVM_END
1649
1650
1651 static Method* jvm_get_method_common(jobject method) {
1652 // some of this code was adapted from from jni_FromReflectedMethod
1653
1654 oop reflected = JNIHandles::resolve_non_null(method);
1655 oop mirror = NULL;
1656 int slot = 0;
1657
1658 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1659 mirror = java_lang_reflect_Constructor::clazz(reflected);
1660 slot = java_lang_reflect_Constructor::slot(reflected);
1661 } else {
1662 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1663 "wrong type");
1664 mirror = java_lang_reflect_Method::clazz(reflected);
1665 slot = java_lang_reflect_Method::slot(reflected);
1666 }
1667 Klass* k = java_lang_Class::as_Klass(mirror);
1668
1669 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1670 assert(m != NULL, "cannot find method");
1671 return m; // caller has to deal with NULL in product mode
1672 }
1673
1674
1675 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1676 JVMWrapper("JVM_GetMethodAnnotations");
1677
1678 // method is a handle to a java.lang.reflect.Method object
1679 Method* m = jvm_get_method_common(method);
1680 if (m == NULL) {
1681 return NULL;
1682 }
1683
1684 return (jbyteArray) JNIHandles::make_local(env,
1685 Annotations::make_java_array(m->annotations(), THREAD));
1686 JVM_END
1687
1688
1689 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1690 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1691
1692 // method is a handle to a java.lang.reflect.Method object
1693 Method* m = jvm_get_method_common(method);
1694 if (m == NULL) {
1695 return NULL;
1696 }
1697
1698 return (jbyteArray) JNIHandles::make_local(env,
1699 Annotations::make_java_array(m->annotation_default(), THREAD));
1700 JVM_END
1701
1702
1703 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1704 JVMWrapper("JVM_GetMethodParameterAnnotations");
1705
1706 // method is a handle to a java.lang.reflect.Method object
1707 Method* m = jvm_get_method_common(method);
1708 if (m == NULL) {
1709 return NULL;
1710 }
1711
1712 return (jbyteArray) JNIHandles::make_local(env,
1713 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1714 JVM_END
1715
1716 /* Type use annotations support (JDK 1.8) */
1717
1718 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1719 assert (cls != NULL, "illegal class");
1720 JVMWrapper("JVM_GetClassTypeAnnotations");
1721 ResourceMark rm(THREAD);
1722 // Return null for arrays and primitives
1723 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1724 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1725 if (k->oop_is_instance()) {
1726 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1727 if (type_annotations != NULL) {
1728 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1729 return (jbyteArray) JNIHandles::make_local(env, a);
1730 }
1731 }
1732 }
1733 return NULL;
1734 JVM_END
1735
1736 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1737 assert (method != NULL, "illegal method");
1738 JVMWrapper("JVM_GetMethodTypeAnnotations");
1739
1740 // method is a handle to a java.lang.reflect.Method object
1741 Method* m = jvm_get_method_common(method);
1742 if (m == NULL) {
1743 return NULL;
1744 }
1745
1746 AnnotationArray* type_annotations = m->type_annotations();
1747 if (type_annotations != NULL) {
1748 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1749 return (jbyteArray) JNIHandles::make_local(env, a);
1750 }
1751
1752 return NULL;
1753 JVM_END
1754
1755 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1756 assert (field != NULL, "illegal field");
1757 JVMWrapper("JVM_GetFieldTypeAnnotations");
1758
1759 fieldDescriptor fd;
1760 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1761 if (!gotFd) {
1762 return NULL;
1763 }
1764
1765 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1766 JVM_END
1767
1768 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1769 if (!cp->is_within_bounds(index)) {
1770 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1771 }
1772 }
1773
1774 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1775 {
1776 JVMWrapper("JVM_GetMethodParameters");
1777 // method is a handle to a java.lang.reflect.Method object
1778 Method* method_ptr = jvm_get_method_common(method);
1779 methodHandle mh (THREAD, method_ptr);
1780 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1781 const int num_params = mh->method_parameters_length();
1782
1783 if (0 != num_params) {
1784 // make sure all the symbols are properly formatted
1785 for (int i = 0; i < num_params; i++) {
1786 MethodParametersElement* params = mh->method_parameters_start();
1787 int index = params[i].name_cp_index;
1788 bounds_check(mh->constants(), index, CHECK_NULL);
1789
1790 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1791 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1792 "Wrong type at constant pool index");
1793 }
1794
1795 }
1796
1797 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1798 objArrayHandle result (THREAD, result_oop);
1799
1800 for (int i = 0; i < num_params; i++) {
1801 MethodParametersElement* params = mh->method_parameters_start();
1802 // For a 0 index, give a NULL symbol
1803 Symbol* sym = 0 != params[i].name_cp_index ?
1804 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1805 int flags = params[i].flags;
1806 oop param = Reflection::new_parameter(reflected_method, i, sym,
1807 flags, CHECK_NULL);
1808 result->obj_at_put(i, param);
1809 }
1810 return (jobjectArray)JNIHandles::make_local(env, result());
1811 } else {
1812 return (jobjectArray)NULL;
1813 }
1814 }
1815 JVM_END
1816
1817 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1818
1819 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1820 {
1821 JVMWrapper("JVM_GetClassDeclaredFields");
1822 JvmtiVMObjectAllocEventCollector oam;
1823
1824 // Exclude primitive types and array types
1825 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1826 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1827 // Return empty array
1828 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1829 return (jobjectArray) JNIHandles::make_local(env, res);
1830 }
1831
1832 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1833 constantPoolHandle cp(THREAD, k->constants());
1834
1835 // Ensure class is linked
1836 k->link_class(CHECK_NULL);
1837
1838 // 4496456 We need to filter out java.lang.Throwable.backtrace
1839 bool skip_backtrace = false;
1840
1841 // Allocate result
1842 int num_fields;
1843
1844 if (publicOnly) {
1845 num_fields = 0;
1846 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1847 if (fs.access_flags().is_public()) ++num_fields;
1848 }
1849 } else {
1850 num_fields = k->java_fields_count();
1851
1852 if (k() == SystemDictionary::Throwable_klass()) {
1853 num_fields--;
1854 skip_backtrace = true;
1855 }
1856 }
1857
1858 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1859 objArrayHandle result (THREAD, r);
1860
1861 int out_idx = 0;
1862 fieldDescriptor fd;
1863 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1864 if (skip_backtrace) {
1865 // 4496456 skip java.lang.Throwable.backtrace
1866 int offset = fs.offset();
1867 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1868 }
1869
1870 if (!publicOnly || fs.access_flags().is_public()) {
1871 fd.reinitialize(k(), fs.index());
1872 oop field = Reflection::new_field(&fd, CHECK_NULL);
1873 result->obj_at_put(out_idx, field);
1874 ++out_idx;
1875 }
1876 }
1877 assert(out_idx == num_fields, "just checking");
1878 return (jobjectArray) JNIHandles::make_local(env, result());
1879 }
1880 JVM_END
1881
1882 static bool select_method(methodHandle method, bool want_constructor) {
1883 if (want_constructor) {
1884 return (method->is_initializer() && !method->is_static());
1885 } else {
1886 return (!method->is_initializer() && !method->is_overpass());
1887 }
1888 }
1889
1890 static jobjectArray get_class_declared_methods_helper(
1891 JNIEnv *env,
1892 jclass ofClass, jboolean publicOnly,
1893 bool want_constructor,
1894 Klass* klass, TRAPS) {
1895
1896 JvmtiVMObjectAllocEventCollector oam;
1897
1898 // Exclude primitive types and array types
1899 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1900 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1901 // Return empty array
1902 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1903 return (jobjectArray) JNIHandles::make_local(env, res);
1904 }
1905
1906 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1907
1908 // Ensure class is linked
1909 k->link_class(CHECK_NULL);
1910
1911 Array<Method*>* methods = k->methods();
1912 int methods_length = methods->length();
1913
1914 // Save original method_idnum in case of redefinition, which can change
1915 // the idnum of obsolete methods. The new method will have the same idnum
1916 // but if we refresh the methods array, the counts will be wrong.
1917 ResourceMark rm(THREAD);
1918 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1919 int num_methods = 0;
1920
1921 for (int i = 0; i < methods_length; i++) {
1922 methodHandle method(THREAD, methods->at(i));
1923 if (select_method(method, want_constructor)) {
1924 if (!publicOnly || method->is_public()) {
1925 idnums->push(method->method_idnum());
1926 ++num_methods;
1927 }
1928 }
1929 }
1930
1931 // Allocate result
1932 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1933 objArrayHandle result (THREAD, r);
1934
1935 // Now just put the methods that we selected above, but go by their idnum
1936 // in case of redefinition. The methods can be redefined at any safepoint,
1937 // so above when allocating the oop array and below when creating reflect
1938 // objects.
1939 for (int i = 0; i < num_methods; i++) {
1940 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1941 if (method.is_null()) {
1942 // Method may have been deleted and seems this API can handle null
1943 // Otherwise should probably put a method that throws NSME
1944 result->obj_at_put(i, NULL);
1945 } else {
1946 oop m;
1947 if (want_constructor) {
1948 m = Reflection::new_constructor(method, CHECK_NULL);
1949 } else {
1950 m = Reflection::new_method(method, false, CHECK_NULL);
1951 }
1952 result->obj_at_put(i, m);
1953 }
1954 }
1955
1956 return (jobjectArray) JNIHandles::make_local(env, result());
1957 }
1958
1959 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1960 {
1961 JVMWrapper("JVM_GetClassDeclaredMethods");
1962 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1963 /*want_constructor*/ false,
1964 SystemDictionary::reflect_Method_klass(), THREAD);
1965 }
1966 JVM_END
1967
1968 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1969 {
1970 JVMWrapper("JVM_GetClassDeclaredConstructors");
1971 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1972 /*want_constructor*/ true,
1973 SystemDictionary::reflect_Constructor_klass(), THREAD);
1974 }
1975 JVM_END
1976
1977 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1978 {
1979 JVMWrapper("JVM_GetClassAccessFlags");
1980 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1981 // Primitive type
1982 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1983 }
1984
1985 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1986 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1987 }
1988 JVM_END
1989
1990
1991 // Constant pool access //////////////////////////////////////////////////////////
1992
1993 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1994 {
1995 JVMWrapper("JVM_GetClassConstantPool");
1996 JvmtiVMObjectAllocEventCollector oam;
1997
1998 // Return null for primitives and arrays
1999 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2000 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2001 if (k->oop_is_instance()) {
2002 instanceKlassHandle k_h(THREAD, k);
2003 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2004 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2005 return JNIHandles::make_local(jcp());
2006 }
2007 }
2008 return NULL;
2009 }
2010 JVM_END
2011
2012
2013 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2014 {
2015 JVMWrapper("JVM_ConstantPoolGetSize");
2016 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2017 return cp->length();
2018 }
2019 JVM_END
2020
2021
2022 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2023 {
2024 JVMWrapper("JVM_ConstantPoolGetClassAt");
2025 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2026 bounds_check(cp, index, CHECK_NULL);
2027 constantTag tag = cp->tag_at(index);
2028 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2029 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2030 }
2031 Klass* k = cp->klass_at(index, CHECK_NULL);
2032 return (jclass) JNIHandles::make_local(k->java_mirror());
2033 }
2034 JVM_END
2035
2036 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2037 {
2038 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2039 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2040 bounds_check(cp, index, CHECK_NULL);
2041 constantTag tag = cp->tag_at(index);
2042 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2043 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2044 }
2045 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2046 if (k == NULL) return NULL;
2047 return (jclass) JNIHandles::make_local(k->java_mirror());
2048 }
2049 JVM_END
2050
2051 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2052 constantTag tag = cp->tag_at(index);
2053 if (!tag.is_method() && !tag.is_interface_method()) {
2054 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2055 }
2056 int klass_ref = cp->uncached_klass_ref_index_at(index);
2057 Klass* k_o;
2058 if (force_resolution) {
2059 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2060 } else {
2061 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2062 if (k_o == NULL) return NULL;
2063 }
2064 instanceKlassHandle k(THREAD, k_o);
2065 Symbol* name = cp->uncached_name_ref_at(index);
2066 Symbol* sig = cp->uncached_signature_ref_at(index);
2067 methodHandle m (THREAD, k->find_method(name, sig));
2068 if (m.is_null()) {
2069 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2070 }
2071 oop method;
2072 if (!m->is_initializer() || m->is_static()) {
2073 method = Reflection::new_method(m, true, CHECK_NULL);
2074 } else {
2075 method = Reflection::new_constructor(m, CHECK_NULL);
2076 }
2077 return JNIHandles::make_local(method);
2078 }
2079
2080 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2081 {
2082 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2083 JvmtiVMObjectAllocEventCollector oam;
2084 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2085 bounds_check(cp, index, CHECK_NULL);
2086 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2087 return res;
2088 }
2089 JVM_END
2090
2091 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2092 {
2093 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2094 JvmtiVMObjectAllocEventCollector oam;
2095 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2096 bounds_check(cp, index, CHECK_NULL);
2097 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2098 return res;
2099 }
2100 JVM_END
2101
2102 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_field()) {
2105 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 int klass_ref = cp->uncached_klass_ref_index_at(index);
2108 Klass* k_o;
2109 if (force_resolution) {
2110 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2111 } else {
2112 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2113 if (k_o == NULL) return NULL;
2114 }
2115 instanceKlassHandle k(THREAD, k_o);
2116 Symbol* name = cp->uncached_name_ref_at(index);
2117 Symbol* sig = cp->uncached_signature_ref_at(index);
2118 fieldDescriptor fd;
2119 Klass* target_klass = k->find_field(name, sig, &fd);
2120 if (target_klass == NULL) {
2121 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2122 }
2123 oop field = Reflection::new_field(&fd, CHECK_NULL);
2124 return JNIHandles::make_local(field);
2125 }
2126
2127 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2128 {
2129 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2130 JvmtiVMObjectAllocEventCollector oam;
2131 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2132 bounds_check(cp, index, CHECK_NULL);
2133 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2134 return res;
2135 }
2136 JVM_END
2137
2138 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2139 {
2140 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2141 JvmtiVMObjectAllocEventCollector oam;
2142 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_NULL);
2144 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2145 return res;
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2150 {
2151 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2152 JvmtiVMObjectAllocEventCollector oam;
2153 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2154 bounds_check(cp, index, CHECK_NULL);
2155 constantTag tag = cp->tag_at(index);
2156 if (!tag.is_field_or_method()) {
2157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2158 }
2159 int klass_ref = cp->uncached_klass_ref_index_at(index);
2160 Symbol* klass_name = cp->klass_name_at(klass_ref);
2161 Symbol* member_name = cp->uncached_name_ref_at(index);
2162 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2163 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2164 objArrayHandle dest(THREAD, dest_o);
2165 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2166 dest->obj_at_put(0, str());
2167 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2168 dest->obj_at_put(1, str());
2169 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2170 dest->obj_at_put(2, str());
2171 return (jobjectArray) JNIHandles::make_local(dest());
2172 }
2173 JVM_END
2174
2175 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177 JVMWrapper("JVM_ConstantPoolGetIntAt");
2178 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2179 bounds_check(cp, index, CHECK_0);
2180 constantTag tag = cp->tag_at(index);
2181 if (!tag.is_int()) {
2182 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2183 }
2184 return cp->int_at(index);
2185 }
2186 JVM_END
2187
2188 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190 JVMWrapper("JVM_ConstantPoolGetLongAt");
2191 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2192 bounds_check(cp, index, CHECK_(0L));
2193 constantTag tag = cp->tag_at(index);
2194 if (!tag.is_long()) {
2195 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2196 }
2197 return cp->long_at(index);
2198 }
2199 JVM_END
2200
2201 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2202 {
2203 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2204 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_(0.0f));
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_float()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 return cp->float_at(index);
2211 }
2212 JVM_END
2213
2214 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2215 {
2216 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2217 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2218 bounds_check(cp, index, CHECK_(0.0));
2219 constantTag tag = cp->tag_at(index);
2220 if (!tag.is_double()) {
2221 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2222 }
2223 return cp->double_at(index);
2224 }
2225 JVM_END
2226
2227 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2228 {
2229 JVMWrapper("JVM_ConstantPoolGetStringAt");
2230 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2231 bounds_check(cp, index, CHECK_NULL);
2232 constantTag tag = cp->tag_at(index);
2233 if (!tag.is_string()) {
2234 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2235 }
2236 oop str = cp->string_at(index, CHECK_NULL);
2237 return (jstring) JNIHandles::make_local(str);
2238 }
2239 JVM_END
2240
2241 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2242 {
2243 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2244 JvmtiVMObjectAllocEventCollector oam;
2245 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2246 bounds_check(cp, index, CHECK_NULL);
2247 constantTag tag = cp->tag_at(index);
2248 if (!tag.is_symbol()) {
2249 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2250 }
2251 Symbol* sym = cp->symbol_at(index);
2252 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2253 return (jstring) JNIHandles::make_local(str());
2254 }
2255 JVM_END
2256
2257
2258 // Assertion support. //////////////////////////////////////////////////////////
2259
2260 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2261 JVMWrapper("JVM_DesiredAssertionStatus");
2262 assert(cls != NULL, "bad class");
2263
2264 oop r = JNIHandles::resolve(cls);
2265 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2266 if (java_lang_Class::is_primitive(r)) return false;
2267
2268 Klass* k = java_lang_Class::as_Klass(r);
2269 assert(k->oop_is_instance(), "must be an instance klass");
2270 if (! k->oop_is_instance()) return false;
2271
2272 ResourceMark rm(THREAD);
2273 const char* name = k->name()->as_C_string();
2274 bool system_class = k->class_loader() == NULL;
2275 return JavaAssertions::enabled(name, system_class);
2276
2277 JVM_END
2278
2279
2280 // Return a new AssertionStatusDirectives object with the fields filled in with
2281 // command-line assertion arguments (i.e., -ea, -da).
2282 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2283 JVMWrapper("JVM_AssertionStatusDirectives");
2284 JvmtiVMObjectAllocEventCollector oam;
2285 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2286 return JNIHandles::make_local(env, asd);
2287 JVM_END
2288
2289 // Verification ////////////////////////////////////////////////////////////////////////////////
2290
2291 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2292
2293 // RedefineClasses support: bug 6214132 caused verification to fail.
2294 // All functions from this section should call the jvmtiThreadSate function:
2295 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2296 // The function returns a Klass* of the _scratch_class if the verifier
2297 // was invoked in the middle of the class redefinition.
2298 // Otherwise it returns its argument value which is the _the_class Klass*.
2299 // Please, refer to the description in the jvmtiThreadSate.hpp.
2300
2301 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2302 JVMWrapper("JVM_GetClassNameUTF");
2303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 return k->name()->as_utf8();
2306 JVM_END
2307
2308
2309 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2310 JVMWrapper("JVM_GetClassCPTypes");
2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 // types will have length zero if this is not an InstanceKlass
2314 // (length is determined by call to JVM_GetClassCPEntriesCount)
2315 if (k->oop_is_instance()) {
2316 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2317 for (int index = cp->length() - 1; index >= 0; index--) {
2318 constantTag tag = cp->tag_at(index);
2319 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2320 }
2321 }
2322 JVM_END
2323
2324
2325 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2326 JVMWrapper("JVM_GetClassCPEntriesCount");
2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329 if (!k->oop_is_instance())
2330 return 0;
2331 return InstanceKlass::cast(k)->constants()->length();
2332 JVM_END
2333
2334
2335 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2336 JVMWrapper("JVM_GetClassFieldsCount");
2337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 if (!k->oop_is_instance())
2340 return 0;
2341 return InstanceKlass::cast(k)->java_fields_count();
2342 JVM_END
2343
2344
2345 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2346 JVMWrapper("JVM_GetClassMethodsCount");
2347 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2348 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2349 if (!k->oop_is_instance())
2350 return 0;
2351 return InstanceKlass::cast(k)->methods()->length();
2352 JVM_END
2353
2354
2355 // The following methods, used for the verifier, are never called with
2356 // array klasses, so a direct cast to InstanceKlass is safe.
2357 // Typically, these methods are called in a loop with bounds determined
2358 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2359 // zero for arrays.
2360 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2361 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2365 int length = method->checked_exceptions_length();
2366 if (length > 0) {
2367 CheckedExceptionElement* table= method->checked_exceptions_start();
2368 for (int i = 0; i < length; i++) {
2369 exceptions[i] = table[i].class_cp_index;
2370 }
2371 }
2372 JVM_END
2373
2374
2375 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2376 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2378 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2379 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2380 return method->checked_exceptions_length();
2381 JVM_END
2382
2383
2384 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2385 JVMWrapper("JVM_GetMethodIxByteCode");
2386 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389 memcpy(code, method->code_base(), method->code_size());
2390 JVM_END
2391
2392
2393 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2394 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2395 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2396 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2397 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2398 return method->code_size();
2399 JVM_END
2400
2401
2402 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2403 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407 ExceptionTable extable(method);
2408 entry->start_pc = extable.start_pc(entry_index);
2409 entry->end_pc = extable.end_pc(entry_index);
2410 entry->handler_pc = extable.handler_pc(entry_index);
2411 entry->catchType = extable.catch_type_index(entry_index);
2412 JVM_END
2413
2414
2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2416 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2420 return method->exception_table_length();
2421 JVM_END
2422
2423
2424 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2425 JVMWrapper("JVM_GetMethodIxModifiers");
2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2430 JVM_END
2431
2432
2433 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2434 JVMWrapper("JVM_GetFieldIxModifiers");
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2438 JVM_END
2439
2440
2441 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2442 JVMWrapper("JVM_GetMethodIxLocalsCount");
2443 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2444 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2445 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2446 return method->max_locals();
2447 JVM_END
2448
2449
2450 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2451 JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2456 JVM_END
2457
2458
2459 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2460 JVMWrapper("JVM_GetMethodIxMaxStack");
2461 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2462 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2463 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2464 return method->verifier_max_stack();
2465 JVM_END
2466
2467
2468 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2469 JVMWrapper("JVM_IsConstructorIx");
2470 ResourceMark rm(THREAD);
2471 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2472 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2473 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2474 return method->name() == vmSymbols::object_initializer_name();
2475 JVM_END
2476
2477
2478 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2479 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2480 ResourceMark rm(THREAD);
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2484 return method->is_overpass();
2485 JVM_END
2486
2487 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2488 JVMWrapper("JVM_GetMethodIxIxUTF");
2489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2492 return method->name()->as_utf8();
2493 JVM_END
2494
2495
2496 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2497 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2501 return method->signature()->as_utf8();
2502 JVM_END
2503
2504 /**
2505 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2506 * read entries in the constant pool. Since the old verifier always
2507 * works on a copy of the code, it will not see any rewriting that
2508 * may possibly occur in the middle of verification. So it is important
2509 * that nothing it calls tries to use the cpCache instead of the raw
2510 * constant pool, so we must use cp->uncached_x methods when appropriate.
2511 */
2512 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2513 JVMWrapper("JVM_GetCPFieldNameUTF");
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2517 switch (cp->tag_at(cp_index).value()) {
2518 case JVM_CONSTANT_Fieldref:
2519 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2520 default:
2521 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2522 }
2523 ShouldNotReachHere();
2524 return NULL;
2525 JVM_END
2526
2527
2528 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2529 JVMWrapper("JVM_GetCPMethodNameUTF");
2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2533 switch (cp->tag_at(cp_index).value()) {
2534 case JVM_CONSTANT_InterfaceMethodref:
2535 case JVM_CONSTANT_Methodref:
2536 case JVM_CONSTANT_NameAndType: // for invokedynamic
2537 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2538 default:
2539 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2540 }
2541 ShouldNotReachHere();
2542 return NULL;
2543 JVM_END
2544
2545
2546 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2547 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2548 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2549 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2550 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2551 switch (cp->tag_at(cp_index).value()) {
2552 case JVM_CONSTANT_InterfaceMethodref:
2553 case JVM_CONSTANT_Methodref:
2554 case JVM_CONSTANT_NameAndType: // for invokedynamic
2555 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2556 default:
2557 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2558 }
2559 ShouldNotReachHere();
2560 return NULL;
2561 JVM_END
2562
2563
2564 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2565 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2566 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2567 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2568 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2569 switch (cp->tag_at(cp_index).value()) {
2570 case JVM_CONSTANT_Fieldref:
2571 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2572 default:
2573 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2574 }
2575 ShouldNotReachHere();
2576 return NULL;
2577 JVM_END
2578
2579
2580 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2581 JVMWrapper("JVM_GetCPClassNameUTF");
2582 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2583 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2584 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2585 Symbol* classname = cp->klass_name_at(cp_index);
2586 return classname->as_utf8();
2587 JVM_END
2588
2589
2590 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2591 JVMWrapper("JVM_GetCPFieldClassNameUTF");
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_Fieldref: {
2597 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2598 Symbol* classname = cp->klass_name_at(class_index);
2599 return classname->as_utf8();
2600 }
2601 default:
2602 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2603 }
2604 ShouldNotReachHere();
2605 return NULL;
2606 JVM_END
2607
2608
2609 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2610 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2614 switch (cp->tag_at(cp_index).value()) {
2615 case JVM_CONSTANT_Methodref:
2616 case JVM_CONSTANT_InterfaceMethodref: {
2617 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2618 Symbol* classname = cp->klass_name_at(class_index);
2619 return classname->as_utf8();
2620 }
2621 default:
2622 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2623 }
2624 ShouldNotReachHere();
2625 return NULL;
2626 JVM_END
2627
2628
2629 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2630 JVMWrapper("JVM_GetCPFieldModifiers");
2631 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2632 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2633 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2634 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2635 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2636 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2637 switch (cp->tag_at(cp_index).value()) {
2638 case JVM_CONSTANT_Fieldref: {
2639 Symbol* name = cp->uncached_name_ref_at(cp_index);
2640 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2641 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2642 if (fs.name() == name && fs.signature() == signature) {
2643 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2644 }
2645 }
2646 return -1;
2647 }
2648 default:
2649 fatal("JVM_GetCPFieldModifiers: illegal constant");
2650 }
2651 ShouldNotReachHere();
2652 return 0;
2653 JVM_END
2654
2655
2656 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2657 JVMWrapper("JVM_GetCPMethodModifiers");
2658 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2659 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2660 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2661 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2662 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2663 switch (cp->tag_at(cp_index).value()) {
2664 case JVM_CONSTANT_Methodref:
2665 case JVM_CONSTANT_InterfaceMethodref: {
2666 Symbol* name = cp->uncached_name_ref_at(cp_index);
2667 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2668 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2669 int methods_count = methods->length();
2670 for (int i = 0; i < methods_count; i++) {
2671 Method* method = methods->at(i);
2672 if (method->name() == name && method->signature() == signature) {
2673 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2674 }
2675 }
2676 return -1;
2677 }
2678 default:
2679 fatal("JVM_GetCPMethodModifiers: illegal constant");
2680 }
2681 ShouldNotReachHere();
2682 return 0;
2683 JVM_END
2684
2685
2686 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2687
2688 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2689 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2690 JVM_END
2691
2692
2693 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2694 JVMWrapper("JVM_IsSameClassPackage");
2695 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2696 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2697 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2698 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2699 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2700 JVM_END
2701
2702
2703 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2704
2705 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2706 JVMWrapper2("JVM_Open (%s)", fname);
2707
2708 //%note jvm_r6
2709 int result = os::open(fname, flags, mode);
2710 if (result >= 0) {
2711 return result;
2712 } else {
2713 switch(errno) {
2714 case EEXIST:
2715 return JVM_EEXIST;
2716 default:
2717 return -1;
2718 }
2719 }
2720 JVM_END
2721
2722
2723 JVM_LEAF(jint, JVM_Close(jint fd))
2724 JVMWrapper2("JVM_Close (0x%x)", fd);
2725 //%note jvm_r6
2726 return os::close(fd);
2727 JVM_END
2728
2729
2730 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2731 JVMWrapper2("JVM_Read (0x%x)", fd);
2732
2733 //%note jvm_r6
2734 return (jint)os::restartable_read(fd, buf, nbytes);
2735 JVM_END
2736
2737
2738 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2739 JVMWrapper2("JVM_Write (0x%x)", fd);
2740
2741 //%note jvm_r6
2742 return (jint)os::write(fd, buf, nbytes);
2743 JVM_END
2744
2745
2746 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2747 JVMWrapper2("JVM_Available (0x%x)", fd);
2748 //%note jvm_r6
2749 return os::available(fd, pbytes);
2750 JVM_END
2751
2752
2753 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2754 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2755 //%note jvm_r6
2756 return os::lseek(fd, offset, whence);
2757 JVM_END
2758
2759
2760 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2761 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2762 return os::ftruncate(fd, length);
2763 JVM_END
2764
2765
2766 JVM_LEAF(jint, JVM_Sync(jint fd))
2767 JVMWrapper2("JVM_Sync (0x%x)", fd);
2768 //%note jvm_r6
2769 return os::fsync(fd);
2770 JVM_END
2771
2772
2773 // Printing support //////////////////////////////////////////////////
2774 extern "C" {
2775
2776 ATTRIBUTE_PRINTF(3, 0)
2777 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2778 // see bug 4399518, 4417214
2779 if ((intptr_t)count <= 0) return -1;
2780 return vsnprintf(str, count, fmt, args);
2781 }
2782
2783 ATTRIBUTE_PRINTF(3, 0)
2784 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2785 va_list args;
2786 int len;
2787 va_start(args, fmt);
2788 len = jio_vsnprintf(str, count, fmt, args);
2789 va_end(args);
2790 return len;
2791 }
2792
2793 ATTRIBUTE_PRINTF(2,3)
2794 int jio_fprintf(FILE* f, const char *fmt, ...) {
2795 int len;
2796 va_list args;
2797 va_start(args, fmt);
2798 len = jio_vfprintf(f, fmt, args);
2799 va_end(args);
2800 return len;
2801 }
2802
2803 ATTRIBUTE_PRINTF(2, 0)
2804 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2805 if (Arguments::vfprintf_hook() != NULL) {
2806 return Arguments::vfprintf_hook()(f, fmt, args);
2807 } else {
2808 return vfprintf(f, fmt, args);
2809 }
2810 }
2811
2812 ATTRIBUTE_PRINTF(1, 2)
2813 JNIEXPORT int jio_printf(const char *fmt, ...) {
2814 int len;
2815 va_list args;
2816 va_start(args, fmt);
2817 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2818 va_end(args);
2819 return len;
2820 }
2821
2822
2823 // HotSpot specific jio method
2824 void jio_print(const char* s) {
2825 // Try to make this function as atomic as possible.
2826 if (Arguments::vfprintf_hook() != NULL) {
2827 jio_fprintf(defaultStream::output_stream(), "%s", s);
2828 } else {
2829 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2830 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2831 }
2832 }
2833
2834 } // Extern C
2835
2836 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2837
2838 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2839 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2840 // OSThread objects. The exception to this rule is when the target object is the thread
2841 // doing the operation, in which case we know that the thread won't exit until the
2842 // operation is done (all exits being voluntary). There are a few cases where it is
2843 // rather silly to do operations on yourself, like resuming yourself or asking whether
2844 // you are alive. While these can still happen, they are not subject to deadlocks if
2845 // the lock is held while the operation occurs (this is not the case for suspend, for
2846 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2847 // implementation is local to this file, we always lock Threads_lock for that one.
2848
2849 static void thread_entry(JavaThread* thread, TRAPS) {
2850 HandleMark hm(THREAD);
2851 Handle obj(THREAD, thread->threadObj());
2852 JavaValue result(T_VOID);
2853 JavaCalls::call_virtual(&result,
2854 obj,
2855 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2856 vmSymbols::run_method_name(),
2857 vmSymbols::void_method_signature(),
2858 THREAD);
2859 }
2860
2861
2862 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2863 JVMWrapper("JVM_StartThread");
2864 JavaThread *native_thread = NULL;
2865
2866 // We cannot hold the Threads_lock when we throw an exception,
2867 // due to rank ordering issues. Example: we might need to grab the
2868 // Heap_lock while we construct the exception.
2869 bool throw_illegal_thread_state = false;
2870
2871 // We must release the Threads_lock before we can post a jvmti event
2872 // in Thread::start.
2873 {
2874 // Ensure that the C++ Thread and OSThread structures aren't freed before
2875 // we operate.
2876 MutexLocker mu(Threads_lock);
2877
2878 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2879 // re-starting an already started thread, so we should usually find
2880 // that the JavaThread is null. However for a JNI attached thread
2881 // there is a small window between the Thread object being created
2882 // (with its JavaThread set) and the update to its threadStatus, so we
2883 // have to check for this
2884 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2885 throw_illegal_thread_state = true;
2886 } else {
2887 // We could also check the stillborn flag to see if this thread was already stopped, but
2888 // for historical reasons we let the thread detect that itself when it starts running
2889
2890 jlong size =
2891 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2892 // Allocate the C++ Thread structure and create the native thread. The
2893 // stack size retrieved from java is signed, but the constructor takes
2894 // size_t (an unsigned type), so avoid passing negative values which would
2895 // result in really large stacks.
2896 size_t sz = size > 0 ? (size_t) size : 0;
2897 native_thread = new JavaThread(&thread_entry, sz);
2898
2899 // At this point it may be possible that no osthread was created for the
2900 // JavaThread due to lack of memory. Check for this situation and throw
2901 // an exception if necessary. Eventually we may want to change this so
2902 // that we only grab the lock if the thread was created successfully -
2903 // then we can also do this check and throw the exception in the
2904 // JavaThread constructor.
2905 if (native_thread->osthread() != NULL) {
2906 // Note: the current thread is not being used within "prepare".
2907 native_thread->prepare(jthread);
2908 }
2909 }
2910 }
2911
2912 if (throw_illegal_thread_state) {
2913 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2914 }
2915
2916 assert(native_thread != NULL, "Starting null thread?");
2917
2918 if (native_thread->osthread() == NULL) {
2919 // No one should hold a reference to the 'native_thread'.
2920 delete native_thread;
2921 if (JvmtiExport::should_post_resource_exhausted()) {
2922 JvmtiExport::post_resource_exhausted(
2923 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2924 os::native_thread_creation_failed_msg());
2925 }
2926 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2927 os::native_thread_creation_failed_msg());
2928 }
2929
2930 Thread::start(native_thread);
2931
2932 JVM_END
2933
2934 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2935 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2936 // but is thought to be reliable and simple. In the case, where the receiver is the
2937 // same thread as the sender, no safepoint is needed.
2938 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2939 JVMWrapper("JVM_StopThread");
2940
2941 oop java_throwable = JNIHandles::resolve(throwable);
2942 if (java_throwable == NULL) {
2943 THROW(vmSymbols::java_lang_NullPointerException());
2944 }
2945 oop java_thread = JNIHandles::resolve_non_null(jthread);
2946 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2947 Events::log_exception(JavaThread::current(),
2948 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2949 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2950 // First check if thread is alive
2951 if (receiver != NULL) {
2952 // Check if exception is getting thrown at self (use oop equality, since the
2953 // target object might exit)
2954 if (java_thread == thread->threadObj()) {
2955 THROW_OOP(java_throwable);
2956 } else {
2957 // Enques a VM_Operation to stop all threads and then deliver the exception...
2958 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2959 }
2960 }
2961 else {
2962 // Either:
2963 // - target thread has not been started before being stopped, or
2964 // - target thread already terminated
2965 // We could read the threadStatus to determine which case it is
2966 // but that is overkill as it doesn't matter. We must set the
2967 // stillborn flag for the first case, and if the thread has already
2968 // exited setting this flag has no affect
2969 java_lang_Thread::set_stillborn(java_thread);
2970 }
2971 JVM_END
2972
2973
2974 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2975 JVMWrapper("JVM_IsThreadAlive");
2976
2977 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2978 return java_lang_Thread::is_alive(thread_oop);
2979 JVM_END
2980
2981
2982 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2983 JVMWrapper("JVM_SuspendThread");
2984 oop java_thread = JNIHandles::resolve_non_null(jthread);
2985 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2986
2987 if (receiver != NULL) {
2988 // thread has run and has not exited (still on threads list)
2989
2990 {
2991 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2992 if (receiver->is_external_suspend()) {
2993 // Don't allow nested external suspend requests. We can't return
2994 // an error from this interface so just ignore the problem.
2995 return;
2996 }
2997 if (receiver->is_exiting()) { // thread is in the process of exiting
2998 return;
2999 }
3000 receiver->set_external_suspend();
3001 }
3002
3003 // java_suspend() will catch threads in the process of exiting
3004 // and will ignore them.
3005 receiver->java_suspend();
3006
3007 // It would be nice to have the following assertion in all the
3008 // time, but it is possible for a racing resume request to have
3009 // resumed this thread right after we suspended it. Temporarily
3010 // enable this assertion if you are chasing a different kind of
3011 // bug.
3012 //
3013 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3014 // receiver->is_being_ext_suspended(), "thread is not suspended");
3015 }
3016 JVM_END
3017
3018
3019 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3020 JVMWrapper("JVM_ResumeThread");
3021 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3022 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3023 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3024 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3025 // looks at it.
3026 MutexLocker ml(Threads_lock);
3027 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3028 if (thr != NULL) {
3029 // the thread has run and is not in the process of exiting
3030 thr->java_resume();
3031 }
3032 JVM_END
3033
3034
3035 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3036 JVMWrapper("JVM_SetThreadPriority");
3037 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3038 MutexLocker ml(Threads_lock);
3039 oop java_thread = JNIHandles::resolve_non_null(jthread);
3040 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3041 JavaThread* thr = java_lang_Thread::thread(java_thread);
3042 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3043 Thread::set_priority(thr, (ThreadPriority)prio);
3044 }
3045 JVM_END
3046
3047
3048 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3049 JVMWrapper("JVM_Yield");
3050 if (os::dont_yield()) return;
3051 HOTSPOT_THREAD_YIELD();
3052
3053 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3054 // Critical for similar threading behaviour
3055 if (ConvertYieldToSleep) {
3056 os::sleep(thread, MinSleepInterval, false);
3057 } else {
3058 os::naked_yield();
3059 }
3060 JVM_END
3061
3062
3063 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3064 JVMWrapper("JVM_Sleep");
3065
3066 if (millis < 0) {
3067 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3068 }
3069
3070 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3071 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3072 }
3073
3074 // Save current thread state and restore it at the end of this block.
3075 // And set new thread state to SLEEPING.
3076 JavaThreadSleepState jtss(thread);
3077
3078 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3079
3080 EventThreadSleep event;
3081
3082 if (millis == 0) {
3083 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3084 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3085 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3086 // for SOLARIS
3087 if (ConvertSleepToYield) {
3088 os::naked_yield();
3089 } else {
3090 ThreadState old_state = thread->osthread()->get_state();
3091 thread->osthread()->set_state(SLEEPING);
3092 os::sleep(thread, MinSleepInterval, false);
3093 thread->osthread()->set_state(old_state);
3094 }
3095 } else {
3096 ThreadState old_state = thread->osthread()->get_state();
3097 thread->osthread()->set_state(SLEEPING);
3098 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3099 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3100 // us while we were sleeping. We do not overwrite those.
3101 if (!HAS_PENDING_EXCEPTION) {
3102 if (event.should_commit()) {
3103 event.set_time(millis);
3104 event.commit();
3105 }
3106 HOTSPOT_THREAD_SLEEP_END(1);
3107
3108 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3109 // to properly restore the thread state. That's likely wrong.
3110 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3111 }
3112 }
3113 thread->osthread()->set_state(old_state);
3114 }
3115 if (event.should_commit()) {
3116 event.set_time(millis);
3117 event.commit();
3118 }
3119 HOTSPOT_THREAD_SLEEP_END(0);
3120 JVM_END
3121
3122 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3123 JVMWrapper("JVM_CurrentThread");
3124 oop jthread = thread->threadObj();
3125 assert (thread != NULL, "no current thread!");
3126 return JNIHandles::make_local(env, jthread);
3127 JVM_END
3128
3129
3130 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3131 JVMWrapper("JVM_CountStackFrames");
3132
3133 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3134 oop java_thread = JNIHandles::resolve_non_null(jthread);
3135 bool throw_illegal_thread_state = false;
3136 int count = 0;
3137
3138 {
3139 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3140 // We need to re-resolve the java_thread, since a GC might have happened during the
3141 // acquire of the lock
3142 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3143
3144 if (thr == NULL) {
3145 // do nothing
3146 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3147 // Check whether this java thread has been suspended already. If not, throws
3148 // IllegalThreadStateException. We defer to throw that exception until
3149 // Threads_lock is released since loading exception class has to leave VM.
3150 // The correct way to test a thread is actually suspended is
3151 // wait_for_ext_suspend_completion(), but we can't call that while holding
3152 // the Threads_lock. The above tests are sufficient for our purposes
3153 // provided the walkability of the stack is stable - which it isn't
3154 // 100% but close enough for most practical purposes.
3155 throw_illegal_thread_state = true;
3156 } else {
3157 // Count all java activation, i.e., number of vframes
3158 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3159 // Native frames are not counted
3160 if (!vfst.method()->is_native()) count++;
3161 }
3162 }
3163 }
3164
3165 if (throw_illegal_thread_state) {
3166 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3167 "this thread is not suspended");
3168 }
3169 return count;
3170 JVM_END
3171
3172 // Consider: A better way to implement JVM_Interrupt() is to acquire
3173 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3174 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3175 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3176 // outside the critical section. Threads_lock is hot so we want to minimize
3177 // the hold-time. A cleaner interface would be to decompose interrupt into
3178 // two steps. The 1st phase, performed under Threads_lock, would return
3179 // a closure that'd be invoked after Threads_lock was dropped.
3180 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3181 // admit spurious wakeups.
3182
3183 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3184 JVMWrapper("JVM_Interrupt");
3185
3186 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3187 oop java_thread = JNIHandles::resolve_non_null(jthread);
3188 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3189 // We need to re-resolve the java_thread, since a GC might have happened during the
3190 // acquire of the lock
3191 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3192 if (thr != NULL) {
3193 Thread::interrupt(thr);
3194 }
3195 JVM_END
3196
3197
3198 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3199 JVMWrapper("JVM_IsInterrupted");
3200
3201 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3202 oop java_thread = JNIHandles::resolve_non_null(jthread);
3203 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3204 // We need to re-resolve the java_thread, since a GC might have happened during the
3205 // acquire of the lock
3206 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3207 if (thr == NULL) {
3208 return JNI_FALSE;
3209 } else {
3210 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3211 }
3212 JVM_END
3213
3214
3215 // Return true iff the current thread has locked the object passed in
3216
3217 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3218 JVMWrapper("JVM_HoldsLock");
3219 assert(THREAD->is_Java_thread(), "sanity check");
3220 if (obj == NULL) {
3221 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3222 }
3223 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3224 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3225 JVM_END
3226
3227
3228 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3229 JVMWrapper("JVM_DumpAllStacks");
3230 VM_PrintThreads op;
3231 VMThread::execute(&op);
3232 if (JvmtiExport::should_post_data_dump()) {
3233 JvmtiExport::post_data_dump();
3234 }
3235 JVM_END
3236
3237 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3238 JVMWrapper("JVM_SetNativeThreadName");
3239 ResourceMark rm(THREAD);
3240 oop java_thread = JNIHandles::resolve_non_null(jthread);
3241 JavaThread* thr = java_lang_Thread::thread(java_thread);
3242 // Thread naming only supported for the current thread, doesn't work for
3243 // target threads.
3244 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3245 // we don't set the name of an attached thread to avoid stepping
3246 // on other programs
3247 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3248 os::set_native_thread_name(thread_name);
3249 }
3250 JVM_END
3251
3252 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3253
3254 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3255 assert(jthread->is_Java_thread(), "must be a Java thread");
3256 if (jthread->privileged_stack_top() == NULL) return false;
3257 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3258 oop loader = jthread->privileged_stack_top()->class_loader();
3259 if (loader == NULL) return true;
3260 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3261 if (trusted) return true;
3262 }
3263 return false;
3264 }
3265
3266 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3267 JVMWrapper("JVM_CurrentLoadedClass");
3268 ResourceMark rm(THREAD);
3269
3270 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3271 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3272 bool trusted = is_trusted_frame(thread, &vfst);
3273 if (trusted) return NULL;
3274
3275 Method* m = vfst.method();
3276 if (!m->is_native()) {
3277 InstanceKlass* holder = m->method_holder();
3278 oop loader = holder->class_loader();
3279 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3280 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3281 }
3282 }
3283 }
3284 return NULL;
3285 JVM_END
3286
3287
3288 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3289 JVMWrapper("JVM_CurrentClassLoader");
3290 ResourceMark rm(THREAD);
3291
3292 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3293
3294 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3295 bool trusted = is_trusted_frame(thread, &vfst);
3296 if (trusted) return NULL;
3297
3298 Method* m = vfst.method();
3299 if (!m->is_native()) {
3300 InstanceKlass* holder = m->method_holder();
3301 assert(holder->is_klass(), "just checking");
3302 oop loader = holder->class_loader();
3303 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3304 return JNIHandles::make_local(env, loader);
3305 }
3306 }
3307 }
3308 return NULL;
3309 JVM_END
3310
3311
3312 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3313 JVMWrapper("JVM_GetClassContext");
3314 ResourceMark rm(THREAD);
3315 JvmtiVMObjectAllocEventCollector oam;
3316 vframeStream vfst(thread);
3317
3318 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3319 // This must only be called from SecurityManager.getClassContext
3320 Method* m = vfst.method();
3321 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3322 m->name() == vmSymbols::getClassContext_name() &&
3323 m->signature() == vmSymbols::void_class_array_signature())) {
3324 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3325 }
3326 }
3327
3328 // Collect method holders
3329 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3330 for (; !vfst.at_end(); vfst.security_next()) {
3331 Method* m = vfst.method();
3332 // Native frames are not returned
3333 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3334 Klass* holder = m->method_holder();
3335 assert(holder->is_klass(), "just checking");
3336 klass_array->append(holder);
3337 }
3338 }
3339
3340 // Create result array of type [Ljava/lang/Class;
3341 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3342 // Fill in mirrors corresponding to method holders
3343 for (int i = 0; i < klass_array->length(); i++) {
3344 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3345 }
3346
3347 return (jobjectArray) JNIHandles::make_local(env, result);
3348 JVM_END
3349
3350
3351 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3352 JVMWrapper("JVM_ClassDepth");
3353 ResourceMark rm(THREAD);
3354 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3355 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3356
3357 const char* str = java_lang_String::as_utf8_string(class_name_str());
3358 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3359 if (class_name_sym == NULL) {
3360 return -1;
3361 }
3362
3363 int depth = 0;
3364
3365 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3366 if (!vfst.method()->is_native()) {
3367 InstanceKlass* holder = vfst.method()->method_holder();
3368 assert(holder->is_klass(), "just checking");
3369 if (holder->name() == class_name_sym) {
3370 return depth;
3371 }
3372 depth++;
3373 }
3374 }
3375 return -1;
3376 JVM_END
3377
3378
3379 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3380 JVMWrapper("JVM_ClassLoaderDepth");
3381 ResourceMark rm(THREAD);
3382 int depth = 0;
3383 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3384 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3385 bool trusted = is_trusted_frame(thread, &vfst);
3386 if (trusted) return -1;
3387
3388 Method* m = vfst.method();
3389 if (!m->is_native()) {
3390 InstanceKlass* holder = m->method_holder();
3391 assert(holder->is_klass(), "just checking");
3392 oop loader = holder->class_loader();
3393 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3394 return depth;
3395 }
3396 depth++;
3397 }
3398 }
3399 return -1;
3400 JVM_END
3401
3402
3403 // java.lang.Package ////////////////////////////////////////////////////////////////
3404
3405
3406 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3407 JVMWrapper("JVM_GetSystemPackage");
3408 ResourceMark rm(THREAD);
3409 JvmtiVMObjectAllocEventCollector oam;
3410 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3411 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3412 return (jstring) JNIHandles::make_local(result);
3413 JVM_END
3414
3415
3416 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3417 JVMWrapper("JVM_GetSystemPackages");
3418 JvmtiVMObjectAllocEventCollector oam;
3419 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3420 return (jobjectArray) JNIHandles::make_local(result);
3421 JVM_END
3422
3423
3424 // ObjectInputStream ///////////////////////////////////////////////////////////////
3425
3426 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3427 if (current_class == NULL) {
3428 return true;
3429 }
3430 if ((current_class == field_class) || access.is_public()) {
3431 return true;
3432 }
3433
3434 if (access.is_protected()) {
3435 // See if current_class is a subclass of field_class
3436 if (current_class->is_subclass_of(field_class)) {
3437 return true;
3438 }
3439 }
3440
3441 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3442 }
3443
3444
3445 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3446 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3447 JVMWrapper("JVM_AllocateNewObject");
3448 JvmtiVMObjectAllocEventCollector oam;
3449 // Receiver is not used
3450 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3451 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3452
3453 // Cannot instantiate primitive types
3454 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3455 ResourceMark rm(THREAD);
3456 THROW_0(vmSymbols::java_lang_InvalidClassException());
3457 }
3458
3459 // Arrays not allowed here, must use JVM_AllocateNewArray
3460 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3461 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3462 ResourceMark rm(THREAD);
3463 THROW_0(vmSymbols::java_lang_InvalidClassException());
3464 }
3465
3466 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3467 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3468
3469 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3470
3471 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3472 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3473
3474 // Make sure klass is initialized, since we are about to instantiate one of them.
3475 curr_klass->initialize(CHECK_NULL);
3476
3477 methodHandle m (THREAD,
3478 init_klass->find_method(vmSymbols::object_initializer_name(),
3479 vmSymbols::void_method_signature()));
3480 if (m.is_null()) {
3481 ResourceMark rm(THREAD);
3482 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3483 Method::name_and_sig_as_C_string(init_klass(),
3484 vmSymbols::object_initializer_name(),
3485 vmSymbols::void_method_signature()));
3486 }
3487
3488 if (curr_klass == init_klass && !m->is_public()) {
3489 // Calling the constructor for class 'curr_klass'.
3490 // Only allow calls to a public no-arg constructor.
3491 // This path corresponds to creating an Externalizable object.
3492 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3493 }
3494
3495 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3496 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3497 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3498 }
3499
3500 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3501 // Call constructor m. This might call a constructor higher up in the hierachy
3502 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3503
3504 return JNIHandles::make_local(obj());
3505 JVM_END
3506
3507
3508 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3509 JVMWrapper("JVM_AllocateNewArray");
3510 JvmtiVMObjectAllocEventCollector oam;
3511 oop mirror = JNIHandles::resolve_non_null(currClass);
3512
3513 if (java_lang_Class::is_primitive(mirror)) {
3514 THROW_0(vmSymbols::java_lang_InvalidClassException());
3515 }
3516 Klass* k = java_lang_Class::as_Klass(mirror);
3517 oop result;
3518
3519 if (k->oop_is_typeArray()) {
3520 // typeArray
3521 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3522 } else if (k->oop_is_objArray()) {
3523 // objArray
3524 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3525 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3526 result = oak->allocate(length, CHECK_NULL);
3527 } else {
3528 THROW_0(vmSymbols::java_lang_InvalidClassException());
3529 }
3530 return JNIHandles::make_local(env, result);
3531 JVM_END
3532
3533
3534 // Return the first non-null class loader up the execution stack, or null
3535 // if only code from the null class loader is on the stack.
3536
3537 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3538 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3539 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3540 oop loader = vfst.method()->method_holder()->class_loader();
3541 if (loader != NULL) {
3542 return JNIHandles::make_local(env, loader);
3543 }
3544 }
3545 return NULL;
3546 JVM_END
3547
3548
3549 // Load a class relative to the most recent class on the stack with a non-null
3550 // classloader.
3551 // This function has been deprecated and should not be considered part of the
3552 // specified JVM interface.
3553
3554 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3555 jclass currClass, jstring currClassName))
3556 JVMWrapper("JVM_LoadClass0");
3557 // Receiver is not used
3558 ResourceMark rm(THREAD);
3559
3560 // Class name argument is not guaranteed to be in internal format
3561 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3562 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3563
3564 const char* str = java_lang_String::as_utf8_string(string());
3565
3566 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3567 // It's impossible to create this class; the name cannot fit
3568 // into the constant pool.
3569 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3570 }
3571
3572 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3573 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3574 // Find the most recent class on the stack with a non-null classloader
3575 oop loader = NULL;
3576 oop protection_domain = NULL;
3577 if (curr_klass.is_null()) {
3578 for (vframeStream vfst(thread);
3579 !vfst.at_end() && loader == NULL;
3580 vfst.next()) {
3581 if (!vfst.method()->is_native()) {
3582 InstanceKlass* holder = vfst.method()->method_holder();
3583 loader = holder->class_loader();
3584 protection_domain = holder->protection_domain();
3585 }
3586 }
3587 } else {
3588 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3589 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3590 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3591 }
3592 Handle h_loader(THREAD, loader);
3593 Handle h_prot (THREAD, protection_domain);
3594 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3595 false, thread);
3596 if (TraceClassResolution && result != NULL) {
3597 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3598 }
3599 return result;
3600 JVM_END
3601
3602
3603 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3604
3605
3606 // resolve array handle and check arguments
3607 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3608 if (arr == NULL) {
3609 THROW_0(vmSymbols::java_lang_NullPointerException());
3610 }
3611 oop a = JNIHandles::resolve_non_null(arr);
3612 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3613 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3614 }
3615 return arrayOop(a);
3616 }
3617
3618
3619 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3620 JVMWrapper("JVM_GetArrayLength");
3621 arrayOop a = check_array(env, arr, false, CHECK_0);
3622 return a->length();
3623 JVM_END
3624
3625
3626 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3627 JVMWrapper("JVM_Array_Get");
3628 JvmtiVMObjectAllocEventCollector oam;
3629 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3630 jvalue value;
3631 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3632 oop box = Reflection::box(&value, type, CHECK_NULL);
3633 return JNIHandles::make_local(env, box);
3634 JVM_END
3635
3636
3637 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3638 JVMWrapper("JVM_GetPrimitiveArrayElement");
3639 jvalue value;
3640 value.i = 0; // to initialize value before getting used in CHECK
3641 arrayOop a = check_array(env, arr, true, CHECK_(value));
3642 assert(a->is_typeArray(), "just checking");
3643 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3644 BasicType wide_type = (BasicType) wCode;
3645 if (type != wide_type) {
3646 Reflection::widen(&value, type, wide_type, CHECK_(value));
3647 }
3648 return value;
3649 JVM_END
3650
3651
3652 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3653 JVMWrapper("JVM_SetArrayElement");
3654 arrayOop a = check_array(env, arr, false, CHECK);
3655 oop box = JNIHandles::resolve(val);
3656 jvalue value;
3657 value.i = 0; // to initialize value before getting used in CHECK
3658 BasicType value_type;
3659 if (a->is_objArray()) {
3660 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3661 value_type = Reflection::unbox_for_regular_object(box, &value);
3662 } else {
3663 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3664 }
3665 Reflection::array_set(&value, a, index, value_type, CHECK);
3666 JVM_END
3667
3668
3669 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3670 JVMWrapper("JVM_SetPrimitiveArrayElement");
3671 arrayOop a = check_array(env, arr, true, CHECK);
3672 assert(a->is_typeArray(), "just checking");
3673 BasicType value_type = (BasicType) vCode;
3674 Reflection::array_set(&v, a, index, value_type, CHECK);
3675 JVM_END
3676
3677
3678 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3679 JVMWrapper("JVM_NewArray");
3680 JvmtiVMObjectAllocEventCollector oam;
3681 oop element_mirror = JNIHandles::resolve(eltClass);
3682 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3683 return JNIHandles::make_local(env, result);
3684 JVM_END
3685
3686
3687 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3688 JVMWrapper("JVM_NewMultiArray");
3689 JvmtiVMObjectAllocEventCollector oam;
3690 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3691 oop element_mirror = JNIHandles::resolve(eltClass);
3692 assert(dim_array->is_typeArray(), "just checking");
3693 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3694 return JNIHandles::make_local(env, result);
3695 JVM_END
3696
3697
3698 // Networking library support ////////////////////////////////////////////////////////////////////
3699
3700 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3701 JVMWrapper("JVM_InitializeSocketLibrary");
3702 return 0;
3703 JVM_END
3704
3705
3706 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3707 JVMWrapper("JVM_Socket");
3708 return os::socket(domain, type, protocol);
3709 JVM_END
3710
3711
3712 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3713 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3714 //%note jvm_r6
3715 return os::socket_close(fd);
3716 JVM_END
3717
3718
3719 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3720 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3721 //%note jvm_r6
3722 return os::socket_shutdown(fd, howto);
3723 JVM_END
3724
3725
3726 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3727 JVMWrapper2("JVM_Recv (0x%x)", fd);
3728 //%note jvm_r6
3729 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3730 JVM_END
3731
3732
3733 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3734 JVMWrapper2("JVM_Send (0x%x)", fd);
3735 //%note jvm_r6
3736 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3737 JVM_END
3738
3739
3740 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3741 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3742 //%note jvm_r6
3743 return os::timeout(fd, timeout);
3744 JVM_END
3745
3746
3747 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3748 JVMWrapper2("JVM_Listen (0x%x)", fd);
3749 //%note jvm_r6
3750 return os::listen(fd, count);
3751 JVM_END
3752
3753
3754 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3755 JVMWrapper2("JVM_Connect (0x%x)", fd);
3756 //%note jvm_r6
3757 return os::connect(fd, him, (socklen_t)len);
3758 JVM_END
3759
3760
3761 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3762 JVMWrapper2("JVM_Bind (0x%x)", fd);
3763 //%note jvm_r6
3764 return os::bind(fd, him, (socklen_t)len);
3765 JVM_END
3766
3767
3768 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3769 JVMWrapper2("JVM_Accept (0x%x)", fd);
3770 //%note jvm_r6
3771 socklen_t socklen = (socklen_t)(*len);
3772 jint result = os::accept(fd, him, &socklen);
3773 *len = (jint)socklen;
3774 return result;
3775 JVM_END
3776
3777
3778 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3779 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3780 //%note jvm_r6
3781 socklen_t socklen = (socklen_t)(*fromlen);
3782 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3783 *fromlen = (int)socklen;
3784 return result;
3785 JVM_END
3786
3787
3788 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3789 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3790 //%note jvm_r6
3791 socklen_t socklen = (socklen_t)(*len);
3792 jint result = os::get_sock_name(fd, him, &socklen);
3793 *len = (int)socklen;
3794 return result;
3795 JVM_END
3796
3797
3798 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3799 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3800 //%note jvm_r6
3801 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3802 JVM_END
3803
3804
3805 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3806 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3807 //%note jvm_r6
3808 return os::socket_available(fd, pbytes);
3809 JVM_END
3810
3811
3812 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3813 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3814 //%note jvm_r6
3815 socklen_t socklen = (socklen_t)(*optlen);
3816 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3817 *optlen = (int)socklen;
3818 return result;
3819 JVM_END
3820
3821
3822 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3823 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3824 //%note jvm_r6
3825 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3826 JVM_END
3827
3828
3829 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3830 JVMWrapper("JVM_GetHostName");
3831 return os::get_host_name(name, namelen);
3832 JVM_END
3833
3834
3835 // Library support ///////////////////////////////////////////////////////////////////////////
3836
3837 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3838 //%note jvm_ct
3839 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3840 char ebuf[1024];
3841 void *load_result;
3842 {
3843 ThreadToNativeFromVM ttnfvm(thread);
3844 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3845 }
3846 if (load_result == NULL) {
3847 char msg[1024];
3848 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3849 // Since 'ebuf' may contain a string encoded using
3850 // platform encoding scheme, we need to pass
3851 // Exceptions::unsafe_to_utf8 to the new_exception method
3852 // as the last argument. See bug 6367357.
3853 Handle h_exception =
3854 Exceptions::new_exception(thread,
3855 vmSymbols::java_lang_UnsatisfiedLinkError(),
3856 msg, Exceptions::unsafe_to_utf8);
3857
3858 THROW_HANDLE_0(h_exception);
3859 }
3860 return load_result;
3861 JVM_END
3862
3863
3864 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3865 JVMWrapper("JVM_UnloadLibrary");
3866 os::dll_unload(handle);
3867 JVM_END
3868
3869
3870 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3871 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3872 return os::dll_lookup(handle, name);
3873 JVM_END
3874
3875
3876 // Floating point support ////////////////////////////////////////////////////////////////////
3877
3878 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3879 JVMWrapper("JVM_IsNaN");
3880 return g_isnan(a);
3881 JVM_END
3882
3883
3884 // JNI version ///////////////////////////////////////////////////////////////////////////////
3885
3886 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3887 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3888 return Threads::is_supported_jni_version_including_1_1(version);
3889 JVM_END
3890
3891
3892 // String support ///////////////////////////////////////////////////////////////////////////
3893
3894 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3895 JVMWrapper("JVM_InternString");
3896 JvmtiVMObjectAllocEventCollector oam;
3897 if (str == NULL) return NULL;
3898 oop string = JNIHandles::resolve_non_null(str);
3899 oop result = StringTable::intern(string, CHECK_NULL);
3900 return (jstring) JNIHandles::make_local(env, result);
3901 JVM_END
3902
3903
3904 // Raw monitor support //////////////////////////////////////////////////////////////////////
3905
3906 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3907 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3908 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3909 // that only works with java threads.
3910
3911
3912 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3913 VM_Exit::block_if_vm_exited();
3914 JVMWrapper("JVM_RawMonitorCreate");
3915 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3916 }
3917
3918
3919 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3920 VM_Exit::block_if_vm_exited();
3921 JVMWrapper("JVM_RawMonitorDestroy");
3922 delete ((Mutex*) mon);
3923 }
3924
3925
3926 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3927 VM_Exit::block_if_vm_exited();
3928 JVMWrapper("JVM_RawMonitorEnter");
3929 ((Mutex*) mon)->jvm_raw_lock();
3930 return 0;
3931 }
3932
3933
3934 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3935 VM_Exit::block_if_vm_exited();
3936 JVMWrapper("JVM_RawMonitorExit");
3937 ((Mutex*) mon)->jvm_raw_unlock();
3938 }
3939
3940
3941 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3942
3943 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3944 // Security Note:
3945 // The Java level wrapper will perform the necessary security check allowing
3946 // us to pass the NULL as the initiating class loader.
3947 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3948
3949 KlassHandle klass_handle(THREAD, klass);
3950 // Check if we should initialize the class
3951 if (init && klass_handle->oop_is_instance()) {
3952 klass_handle->initialize(CHECK_NULL);
3953 }
3954 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3955 }
3956
3957
3958 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3959
3960 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3961 JVMWrapper("JVM_InvokeMethod");
3962 Handle method_handle;
3963 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3964 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3965 Handle receiver(THREAD, JNIHandles::resolve(obj));
3966 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3967 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3968 jobject res = JNIHandles::make_local(env, result);
3969 if (JvmtiExport::should_post_vm_object_alloc()) {
3970 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3971 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3972 if (java_lang_Class::is_primitive(ret_type)) {
3973 // Only for primitive type vm allocates memory for java object.
3974 // See box() method.
3975 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3976 }
3977 }
3978 return res;
3979 } else {
3980 THROW_0(vmSymbols::java_lang_StackOverflowError());
3981 }
3982 JVM_END
3983
3984
3985 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3986 JVMWrapper("JVM_NewInstanceFromConstructor");
3987 oop constructor_mirror = JNIHandles::resolve(c);
3988 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3989 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3990 jobject res = JNIHandles::make_local(env, result);
3991 if (JvmtiExport::should_post_vm_object_alloc()) {
3992 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3993 }
3994 return res;
3995 JVM_END
3996
3997 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3998
3999 JVM_LEAF(jboolean, JVM_SupportsCX8())
4000 JVMWrapper("JVM_SupportsCX8");
4001 return VM_Version::supports_cx8();
4002 JVM_END
4003
4004
4005 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4006 JVMWrapper("JVM_CX8Field");
4007 jlong res;
4008 oop o = JNIHandles::resolve(obj);
4009 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4010 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4011
4012 assert(VM_Version::supports_cx8(), "cx8 not supported");
4013 res = Atomic::cmpxchg(newVal, addr, oldVal);
4014
4015 return res == oldVal;
4016 JVM_END
4017
4018 // DTrace ///////////////////////////////////////////////////////////////////
4019
4020 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4021 JVMWrapper("JVM_DTraceGetVersion");
4022 return (jint)JVM_TRACING_DTRACE_VERSION;
4023 JVM_END
4024
4025 JVM_ENTRY(jlong,JVM_DTraceActivate(
4026 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4027 JVM_DTraceProvider* providers))
4028 JVMWrapper("JVM_DTraceActivate");
4029 return DTraceJSDT::activate(
4030 version, module_name, providers_count, providers, CHECK_0);
4031 JVM_END
4032
4033 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4034 JVMWrapper("JVM_DTraceIsProbeEnabled");
4035 return DTraceJSDT::is_probe_enabled(method);
4036 JVM_END
4037
4038 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4039 JVMWrapper("JVM_DTraceDispose");
4040 DTraceJSDT::dispose(handle);
4041 JVM_END
4042
4043 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4044 JVMWrapper("JVM_DTraceIsSupported");
4045 return DTraceJSDT::is_supported();
4046 JVM_END
4047
4048 // Returns an array of all live Thread objects (VM internal JavaThreads,
4049 // jvmti agent threads, and JNI attaching threads are skipped)
4050 // See CR 6404306 regarding JNI attaching threads
4051 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4052 ResourceMark rm(THREAD);
4053 ThreadsListEnumerator tle(THREAD, false, false);
4054 JvmtiVMObjectAllocEventCollector oam;
4055
4056 int num_threads = tle.num_threads();
4057 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4058 objArrayHandle threads_ah(THREAD, r);
4059
4060 for (int i = 0; i < num_threads; i++) {
4061 Handle h = tle.get_threadObj(i);
4062 threads_ah->obj_at_put(i, h());
4063 }
4064
4065 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4066 JVM_END
4067
4068
4069 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4070 // Return StackTraceElement[][], each element is the stack trace of a thread in
4071 // the corresponding entry in the given threads array
4072 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4073 JVMWrapper("JVM_DumpThreads");
4074 JvmtiVMObjectAllocEventCollector oam;
4075
4076 // Check if threads is null
4077 if (threads == NULL) {
4078 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4079 }
4080
4081 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4082 objArrayHandle ah(THREAD, a);
4083 int num_threads = ah->length();
4084 // check if threads is non-empty array
4085 if (num_threads == 0) {
4086 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4087 }
4088
4089 // check if threads is not an array of objects of Thread class
4090 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4091 if (k != SystemDictionary::Thread_klass()) {
4092 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4093 }
4094
4095 ResourceMark rm(THREAD);
4096
4097 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4098 for (int i = 0; i < num_threads; i++) {
4099 oop thread_obj = ah->obj_at(i);
4100 instanceHandle h(THREAD, (instanceOop) thread_obj);
4101 thread_handle_array->append(h);
4102 }
4103
4104 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4105 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4106
4107 JVM_END
4108
4109 // JVM monitoring and management support
4110 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4111 return Management::get_jmm_interface(version);
4112 JVM_END
4113
4114 // com.sun.tools.attach.VirtualMachine agent properties support
4115 //
4116 // Initialize the agent properties with the properties maintained in the VM
4117 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4118 JVMWrapper("JVM_InitAgentProperties");
4119 ResourceMark rm;
4120
4121 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4122
4123 PUTPROP(props, "sun.java.command", Arguments::java_command());
4124 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4125 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4126 return properties;
4127 JVM_END
4128
4129 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4130 {
4131 JVMWrapper("JVM_GetEnclosingMethodInfo");
4132 JvmtiVMObjectAllocEventCollector oam;
4133
4134 if (ofClass == NULL) {
4135 return NULL;
4136 }
4137 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4138 // Special handling for primitive objects
4139 if (java_lang_Class::is_primitive(mirror())) {
4140 return NULL;
4141 }
4142 Klass* k = java_lang_Class::as_Klass(mirror());
4143 if (!k->oop_is_instance()) {
4144 return NULL;
4145 }
4146 instanceKlassHandle ik_h(THREAD, k);
4147 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4148 if (encl_method_class_idx == 0) {
4149 return NULL;
4150 }
4151 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4152 objArrayHandle dest(THREAD, dest_o);
4153 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4154 dest->obj_at_put(0, enc_k->java_mirror());
4155 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4156 if (encl_method_method_idx != 0) {
4157 Symbol* sym = ik_h->constants()->symbol_at(
4158 extract_low_short_from_int(
4159 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4160 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4161 dest->obj_at_put(1, str());
4162 sym = ik_h->constants()->symbol_at(
4163 extract_high_short_from_int(
4164 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4165 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4166 dest->obj_at_put(2, str());
4167 }
4168 return (jobjectArray) JNIHandles::make_local(dest());
4169 }
4170 JVM_END
4171
4172 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4173 jint javaThreadState))
4174 {
4175 // If new thread states are added in future JDK and VM versions,
4176 // this should check if the JDK version is compatible with thread
4177 // states supported by the VM. Return NULL if not compatible.
4178 //
4179 // This function must map the VM java_lang_Thread::ThreadStatus
4180 // to the Java thread state that the JDK supports.
4181 //
4182
4183 typeArrayHandle values_h;
4184 switch (javaThreadState) {
4185 case JAVA_THREAD_STATE_NEW : {
4186 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4187 values_h = typeArrayHandle(THREAD, r);
4188 values_h->int_at_put(0, java_lang_Thread::NEW);
4189 break;
4190 }
4191 case JAVA_THREAD_STATE_RUNNABLE : {
4192 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4193 values_h = typeArrayHandle(THREAD, r);
4194 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4195 break;
4196 }
4197 case JAVA_THREAD_STATE_BLOCKED : {
4198 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4199 values_h = typeArrayHandle(THREAD, r);
4200 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4201 break;
4202 }
4203 case JAVA_THREAD_STATE_WAITING : {
4204 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4205 values_h = typeArrayHandle(THREAD, r);
4206 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4207 values_h->int_at_put(1, java_lang_Thread::PARKED);
4208 break;
4209 }
4210 case JAVA_THREAD_STATE_TIMED_WAITING : {
4211 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4212 values_h = typeArrayHandle(THREAD, r);
4213 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4214 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4215 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4216 break;
4217 }
4218 case JAVA_THREAD_STATE_TERMINATED : {
4219 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4220 values_h = typeArrayHandle(THREAD, r);
4221 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4222 break;
4223 }
4224 default:
4225 // Unknown state - probably incompatible JDK version
4226 return NULL;
4227 }
4228
4229 return (jintArray) JNIHandles::make_local(env, values_h());
4230 }
4231 JVM_END
4232
4233
4234 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4235 jint javaThreadState,
4236 jintArray values))
4237 {
4238 // If new thread states are added in future JDK and VM versions,
4239 // this should check if the JDK version is compatible with thread
4240 // states supported by the VM. Return NULL if not compatible.
4241 //
4242 // This function must map the VM java_lang_Thread::ThreadStatus
4243 // to the Java thread state that the JDK supports.
4244 //
4245
4246 ResourceMark rm;
4247
4248 // Check if threads is null
4249 if (values == NULL) {
4250 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4251 }
4252
4253 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4254 typeArrayHandle values_h(THREAD, v);
4255
4256 objArrayHandle names_h;
4257 switch (javaThreadState) {
4258 case JAVA_THREAD_STATE_NEW : {
4259 assert(values_h->length() == 1 &&
4260 values_h->int_at(0) == java_lang_Thread::NEW,
4261 "Invalid threadStatus value");
4262
4263 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4264 1, /* only 1 substate */
4265 CHECK_NULL);
4266 names_h = objArrayHandle(THREAD, r);
4267 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4268 names_h->obj_at_put(0, name());
4269 break;
4270 }
4271 case JAVA_THREAD_STATE_RUNNABLE : {
4272 assert(values_h->length() == 1 &&
4273 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4274 "Invalid threadStatus value");
4275
4276 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4277 1, /* only 1 substate */
4278 CHECK_NULL);
4279 names_h = objArrayHandle(THREAD, r);
4280 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4281 names_h->obj_at_put(0, name());
4282 break;
4283 }
4284 case JAVA_THREAD_STATE_BLOCKED : {
4285 assert(values_h->length() == 1 &&
4286 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4287 "Invalid threadStatus value");
4288
4289 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4290 1, /* only 1 substate */
4291 CHECK_NULL);
4292 names_h = objArrayHandle(THREAD, r);
4293 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4294 names_h->obj_at_put(0, name());
4295 break;
4296 }
4297 case JAVA_THREAD_STATE_WAITING : {
4298 assert(values_h->length() == 2 &&
4299 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4300 values_h->int_at(1) == java_lang_Thread::PARKED,
4301 "Invalid threadStatus value");
4302 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4303 2, /* number of substates */
4304 CHECK_NULL);
4305 names_h = objArrayHandle(THREAD, r);
4306 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4307 CHECK_NULL);
4308 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4309 CHECK_NULL);
4310 names_h->obj_at_put(0, name0());
4311 names_h->obj_at_put(1, name1());
4312 break;
4313 }
4314 case JAVA_THREAD_STATE_TIMED_WAITING : {
4315 assert(values_h->length() == 3 &&
4316 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4317 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4318 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4319 "Invalid threadStatus value");
4320 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4321 3, /* number of substates */
4322 CHECK_NULL);
4323 names_h = objArrayHandle(THREAD, r);
4324 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4325 CHECK_NULL);
4326 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4327 CHECK_NULL);
4328 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4329 CHECK_NULL);
4330 names_h->obj_at_put(0, name0());
4331 names_h->obj_at_put(1, name1());
4332 names_h->obj_at_put(2, name2());
4333 break;
4334 }
4335 case JAVA_THREAD_STATE_TERMINATED : {
4336 assert(values_h->length() == 1 &&
4337 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4338 "Invalid threadStatus value");
4339 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4340 1, /* only 1 substate */
4341 CHECK_NULL);
4342 names_h = objArrayHandle(THREAD, r);
4343 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4344 names_h->obj_at_put(0, name());
4345 break;
4346 }
4347 default:
4348 // Unknown state - probably incompatible JDK version
4349 return NULL;
4350 }
4351 return (jobjectArray) JNIHandles::make_local(env, names_h());
4352 }
4353 JVM_END
4354
4355 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4356 {
4357 memset(info, 0, info_size);
4358
4359 info->jvm_version = Abstract_VM_Version::jvm_version();
4360 info->update_version = 0; /* 0 in HotSpot Express VM */
4361 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4362
4363 // when we add a new capability in the jvm_version_info struct, we should also
4364 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4365 // counter defined in runtimeService.cpp.
4366 info->is_attachable = AttachListener::is_attach_supported();
4367 }
4368 JVM_END