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 // Not used; JVM_FindClassFromCaller replaces this.
809 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
810 jboolean init, jobject loader,
811 jboolean throwError))
812 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
813 throwError ? "error" : "exception");
814 // Java libraries should ensure that name is never null...
815 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
816 // It's impossible to create this class; the name cannot fit
817 // into the constant pool.
818 if (throwError) {
819 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
820 } else {
821 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
822 }
823 }
824 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
825 Handle h_loader(THREAD, JNIHandles::resolve(loader));
826 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
827 Handle(), throwError, THREAD);
828
829 if (TraceClassResolution && result != NULL) {
830 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
831 }
832 return result;
833 JVM_END
834
835 // Find a class with this name in this loader, using the caller's protection domain.
836 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
837 jboolean init, jobject loader,
838 jclass caller))
839 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
840 // Java libraries should ensure that name is never null...
841 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
842 // It's impossible to create this class; the name cannot fit
843 // into the constant pool.
844 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
845 }
846
847 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
848
849 oop loader_oop = JNIHandles::resolve(loader);
850 oop from_class = JNIHandles::resolve(caller);
851 oop protection_domain = NULL;
852 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
853 // NPE. Put it in another way, the bootstrap class loader has all permission and
854 // thus no checkPackageAccess equivalence in the VM class loader.
855 // The caller is also passed as NULL by the java code if there is no security
856 // manager to avoid the performance cost of getting the calling class.
857 if (from_class != NULL && loader_oop != NULL) {
858 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
859 }
860
861 Handle h_loader(THREAD, loader_oop);
862 Handle h_prot(THREAD, protection_domain);
863 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
864 h_prot, false, THREAD);
865
866 if (TraceClassResolution && result != NULL) {
867 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
868 }
869 return result;
870 JVM_END
871
872 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
873 jboolean init, jclass from))
874 JVMWrapper2("JVM_FindClassFromClass %s", name);
875 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
876 // It's impossible to create this class; the name cannot fit
877 // into the constant pool.
878 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
879 }
880 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
881 oop from_class_oop = JNIHandles::resolve(from);
882 Klass* from_class = (from_class_oop == NULL)
883 ? (Klass*)NULL
884 : java_lang_Class::as_Klass(from_class_oop);
885 oop class_loader = NULL;
886 oop protection_domain = NULL;
887 if (from_class != NULL) {
888 class_loader = from_class->class_loader();
889 protection_domain = from_class->protection_domain();
890 }
891 Handle h_loader(THREAD, class_loader);
892 Handle h_prot (THREAD, protection_domain);
893 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
894 h_prot, true, thread);
895
896 if (TraceClassResolution && result != NULL) {
897 // this function is generally only used for class loading during verification.
898 ResourceMark rm;
899 oop from_mirror = JNIHandles::resolve_non_null(from);
900 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
901 const char * from_name = from_class->external_name();
902
903 oop mirror = JNIHandles::resolve_non_null(result);
904 Klass* to_class = java_lang_Class::as_Klass(mirror);
905 const char * to = to_class->external_name();
906 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
907 }
908
909 return result;
910 JVM_END
911
912 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
913 if (loader.is_null()) {
914 return;
915 }
916
917 // check whether the current caller thread holds the lock or not.
918 // If not, increment the corresponding counter
919 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
920 ObjectSynchronizer::owner_self) {
921 counter->inc();
922 }
923 }
924
925 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
926 // and JVM_DefineClassWithSourceCond()
927 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
928 jobject loader, const jbyte *buf,
929 jsize len, jobject pd, const char *source,
930 jboolean verify, TRAPS) {
931 if (source == NULL) source = "__JVM_DefineClass__";
932
933 assert(THREAD->is_Java_thread(), "must be a JavaThread");
934 JavaThread* jt = (JavaThread*) THREAD;
935
936 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
937 ClassLoader::perf_define_appclass_selftime(),
938 ClassLoader::perf_define_appclasses(),
939 jt->get_thread_stat()->perf_recursion_counts_addr(),
940 jt->get_thread_stat()->perf_timers_addr(),
941 PerfClassTraceTime::DEFINE_CLASS);
942
943 if (UsePerfData) {
944 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
945 }
946
947 // Since exceptions can be thrown, class initialization can take place
948 // if name is NULL no check for class name in .class stream has to be made.
949 TempNewSymbol class_name = NULL;
950 if (name != NULL) {
951 const int str_len = (int)strlen(name);
952 if (str_len > Symbol::max_length()) {
953 // It's impossible to create this class; the name cannot fit
954 // into the constant pool.
955 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
956 }
957 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
958 }
959
960 ResourceMark rm(THREAD);
961 ClassFileStream st((u1*) buf, len, (char *)source);
962 Handle class_loader (THREAD, JNIHandles::resolve(loader));
963 if (UsePerfData) {
964 is_lock_held_by_thread(class_loader,
965 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
966 THREAD);
967 }
968 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
969 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
970 protection_domain, &st,
971 verify != 0,
972 CHECK_NULL);
973
974 if (TraceClassResolution && k != NULL) {
975 trace_class_resolution(k);
976 }
977
978 return (jclass) JNIHandles::make_local(env, k->java_mirror());
979 }
980
981
982 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
983 JVMWrapper2("JVM_DefineClass %s", name);
984
985 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
986 JVM_END
987
988
989 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
990 JVMWrapper2("JVM_DefineClassWithSource %s", name);
991
992 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
993 JVM_END
994
995 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
996 jobject loader, const jbyte *buf,
997 jsize len, jobject pd,
998 const char *source, jboolean verify))
999 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1000
1001 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1002 JVM_END
1003
1004 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1005 JVMWrapper("JVM_FindLoadedClass");
1006 ResourceMark rm(THREAD);
1007
1008 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1009 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1010
1011 const char* str = java_lang_String::as_utf8_string(string());
1012 // Sanity check, don't expect null
1013 if (str == NULL) return NULL;
1014
1015 const int str_len = (int)strlen(str);
1016 if (str_len > Symbol::max_length()) {
1017 // It's impossible to create this class; the name cannot fit
1018 // into the constant pool.
1019 return NULL;
1020 }
1021 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1022
1023 // Security Note:
1024 // The Java level wrapper will perform the necessary security check allowing
1025 // us to pass the NULL as the initiating class loader.
1026 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1027 if (UsePerfData) {
1028 is_lock_held_by_thread(h_loader,
1029 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1030 THREAD);
1031 }
1032
1033 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1034 h_loader,
1035 Handle(),
1036 CHECK_NULL);
1037 #if INCLUDE_CDS
1038 if (k == NULL) {
1039 // If the class is not already loaded, try to see if it's in the shared
1040 // archive for the current classloader (h_loader).
1041 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1042 klass_name, h_loader, CHECK_NULL);
1043 k = ik();
1044 }
1045 #endif
1046 return (k == NULL) ? NULL :
1047 (jclass) JNIHandles::make_local(env, k->java_mirror());
1048 JVM_END
1049
1050
1051 // Reflection support //////////////////////////////////////////////////////////////////////////////
1052
1053 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1054 assert (cls != NULL, "illegal class");
1055 JVMWrapper("JVM_GetClassName");
1056 JvmtiVMObjectAllocEventCollector oam;
1057 ResourceMark rm(THREAD);
1058 const char* name;
1059 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1060 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1061 } else {
1062 // Consider caching interned string in Klass
1063 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1064 assert(k->is_klass(), "just checking");
1065 name = k->external_name();
1066 }
1067 oop result = StringTable::intern((char*) name, CHECK_NULL);
1068 return (jstring) JNIHandles::make_local(env, result);
1069 JVM_END
1070
1071
1072 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1073 JVMWrapper("JVM_GetClassInterfaces");
1074 JvmtiVMObjectAllocEventCollector oam;
1075 oop mirror = JNIHandles::resolve_non_null(cls);
1076
1077 // Special handling for primitive objects
1078 if (java_lang_Class::is_primitive(mirror)) {
1079 // Primitive objects does not have any interfaces
1080 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1081 return (jobjectArray) JNIHandles::make_local(env, r);
1082 }
1083
1084 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1085 // Figure size of result array
1086 int size;
1087 if (klass->oop_is_instance()) {
1088 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1089 } else {
1090 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1091 size = 2;
1092 }
1093
1094 // Allocate result array
1095 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1096 objArrayHandle result (THREAD, r);
1097 // Fill in result
1098 if (klass->oop_is_instance()) {
1099 // Regular instance klass, fill in all local interfaces
1100 for (int index = 0; index < size; index++) {
1101 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1102 result->obj_at_put(index, k->java_mirror());
1103 }
1104 } else {
1105 // All arrays implement java.lang.Cloneable and java.io.Serializable
1106 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1107 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1108 }
1109 return (jobjectArray) JNIHandles::make_local(env, result());
1110 JVM_END
1111
1112
1113 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1114 JVMWrapper("JVM_IsInterface");
1115 oop mirror = JNIHandles::resolve_non_null(cls);
1116 if (java_lang_Class::is_primitive(mirror)) {
1117 return JNI_FALSE;
1118 }
1119 Klass* k = java_lang_Class::as_Klass(mirror);
1120 jboolean result = k->is_interface();
1121 assert(!result || k->oop_is_instance(),
1122 "all interfaces are instance types");
1123 // The compiler intrinsic for isInterface tests the
1124 // Klass::_access_flags bits in the same way.
1125 return result;
1126 JVM_END
1127
1128
1129 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1130 JVMWrapper("JVM_GetClassSigners");
1131 JvmtiVMObjectAllocEventCollector oam;
1132 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1133 // There are no signers for primitive types
1134 return NULL;
1135 }
1136
1137 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1138
1139 // If there are no signers set in the class, or if the class
1140 // is an array, return NULL.
1141 if (signers == NULL) return NULL;
1142
1143 // copy of the signers array
1144 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1145 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1146 for (int index = 0; index < signers->length(); index++) {
1147 signers_copy->obj_at_put(index, signers->obj_at(index));
1148 }
1149
1150 // return the copy
1151 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1152 JVM_END
1153
1154
1155 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1156 JVMWrapper("JVM_SetClassSigners");
1157 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1158 // This call is ignored for primitive types and arrays.
1159 // Signers are only set once, ClassLoader.java, and thus shouldn't
1160 // be called with an array. Only the bootstrap loader creates arrays.
1161 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1162 if (k->oop_is_instance()) {
1163 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1164 }
1165 }
1166 JVM_END
1167
1168
1169 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1170 JVMWrapper("JVM_GetProtectionDomain");
1171 if (JNIHandles::resolve(cls) == NULL) {
1172 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1173 }
1174
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1176 // Primitive types does not have a protection domain.
1177 return NULL;
1178 }
1179
1180 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1181 return (jobject) JNIHandles::make_local(env, pd);
1182 JVM_END
1183
1184
1185 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1186 // If there is a security manager and protection domain, check the access
1187 // in the protection domain, otherwise it is authorized.
1188 if (java_lang_System::has_security_manager()) {
1189
1190 // For bootstrapping, if pd implies method isn't in the JDK, allow
1191 // this context to revert to older behavior.
1192 // In this case the isAuthorized field in AccessControlContext is also not
1193 // present.
1194 if (Universe::protection_domain_implies_method() == NULL) {
1195 return true;
1196 }
1197
1198 // Whitelist certain access control contexts
1199 if (java_security_AccessControlContext::is_authorized(context)) {
1200 return true;
1201 }
1202
1203 oop prot = klass->protection_domain();
1204 if (prot != NULL) {
1205 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1206 // in the new wrapper.
1207 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1208 Handle h_prot(THREAD, prot);
1209 JavaValue result(T_BOOLEAN);
1210 JavaCallArguments args(h_prot);
1211 JavaCalls::call(&result, m, &args, CHECK_false);
1212 return (result.get_jboolean() != 0);
1213 }
1214 }
1215 return true;
1216 }
1217
1218 // Create an AccessControlContext with a protection domain with null codesource
1219 // and null permissions - which gives no permissions.
1220 oop create_dummy_access_control_context(TRAPS) {
1221 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1222 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1223 // Call constructor ProtectionDomain(null, null);
1224 JavaValue result(T_VOID);
1225 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1226 vmSymbols::object_initializer_name(),
1227 vmSymbols::codesource_permissioncollection_signature(),
1228 Handle(), Handle(), CHECK_NULL);
1229
1230 // new ProtectionDomain[] {pd};
1231 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1232 context->obj_at_put(0, obj());
1233
1234 // new AccessControlContext(new ProtectionDomain[] {pd})
1235 objArrayHandle h_context(THREAD, context);
1236 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1237 return acc;
1238 }
1239
1240 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1241 JVMWrapper("JVM_DoPrivileged");
1242
1243 if (action == NULL) {
1244 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1245 }
1246
1247 // Compute the frame initiating the do privileged operation and setup the privileged stack
1248 vframeStream vfst(thread);
1249 vfst.security_get_caller_frame(1);
1250
1251 if (vfst.at_end()) {
1252 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1253 }
1254
1255 Method* method = vfst.method();
1256 instanceKlassHandle klass (THREAD, method->method_holder());
1257
1258 // Check that action object understands "Object run()"
1259 Handle h_context;
1260 if (context != NULL) {
1261 h_context = Handle(THREAD, JNIHandles::resolve(context));
1262 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1263 if (!authorized) {
1264 // Create an unprivileged access control object and call it's run function
1265 // instead.
1266 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1267 h_context = Handle(THREAD, noprivs);
1268 }
1269 }
1270
1271 // Check that action object understands "Object run()"
1272 Handle object (THREAD, JNIHandles::resolve(action));
1273
1274 // get run() method
1275 Method* m_oop = object->klass()->uncached_lookup_method(
1276 vmSymbols::run_method_name(),
1277 vmSymbols::void_object_signature(),
1278 Klass::normal);
1279 methodHandle m (THREAD, m_oop);
1280 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1281 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1282 }
1283
1284 // Stack allocated list of privileged stack elements
1285 PrivilegedElement pi;
1286 if (!vfst.at_end()) {
1287 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1288 thread->set_privileged_stack_top(&pi);
1289 }
1290
1291
1292 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1293 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1294 Handle pending_exception;
1295 JavaValue result(T_OBJECT);
1296 JavaCallArguments args(object);
1297 JavaCalls::call(&result, m, &args, THREAD);
1298
1299 // done with action, remove ourselves from the list
1300 if (!vfst.at_end()) {
1301 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1302 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1303 }
1304
1305 if (HAS_PENDING_EXCEPTION) {
1306 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1307 CLEAR_PENDING_EXCEPTION;
1308 // JVMTI has already reported the pending exception
1309 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1310 if (THREAD->is_Java_thread()) {
1311 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1312 }
1313 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1314 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1315 // Throw a java.security.PrivilegedActionException(Exception e) exception
1316 JavaCallArguments args(pending_exception);
1317 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1318 vmSymbols::exception_void_signature(),
1319 &args);
1320 }
1321 }
1322
1323 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1324 return JNIHandles::make_local(env, (oop) result.get_jobject());
1325 JVM_END
1326
1327
1328 // Returns the inherited_access_control_context field of the running thread.
1329 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1330 JVMWrapper("JVM_GetInheritedAccessControlContext");
1331 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1332 return JNIHandles::make_local(env, result);
1333 JVM_END
1334
1335 class RegisterArrayForGC {
1336 private:
1337 JavaThread *_thread;
1338 public:
1339 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1340 _thread = thread;
1341 _thread->register_array_for_gc(array);
1342 }
1343
1344 ~RegisterArrayForGC() {
1345 _thread->register_array_for_gc(NULL);
1346 }
1347 };
1348
1349
1350 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1351 JVMWrapper("JVM_GetStackAccessControlContext");
1352 if (!UsePrivilegedStack) return NULL;
1353
1354 ResourceMark rm(THREAD);
1355 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1356 JvmtiVMObjectAllocEventCollector oam;
1357
1358 // count the protection domains on the execution stack. We collapse
1359 // duplicate consecutive protection domains into a single one, as
1360 // well as stopping when we hit a privileged frame.
1361
1362 // Use vframeStream to iterate through Java frames
1363 vframeStream vfst(thread);
1364
1365 oop previous_protection_domain = NULL;
1366 Handle privileged_context(thread, NULL);
1367 bool is_privileged = false;
1368 oop protection_domain = NULL;
1369
1370 for(; !vfst.at_end(); vfst.next()) {
1371 // get method of frame
1372 Method* method = vfst.method();
1373 intptr_t* frame_id = vfst.frame_id();
1374
1375 // check the privileged frames to see if we have a match
1376 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1377 // this frame is privileged
1378 is_privileged = true;
1379 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1380 protection_domain = thread->privileged_stack_top()->protection_domain();
1381 } else {
1382 protection_domain = method->method_holder()->protection_domain();
1383 }
1384
1385 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1386 local_array->push(protection_domain);
1387 previous_protection_domain = protection_domain;
1388 }
1389
1390 if (is_privileged) break;
1391 }
1392
1393
1394 // either all the domains on the stack were system domains, or
1395 // we had a privileged system domain
1396 if (local_array->is_empty()) {
1397 if (is_privileged && privileged_context.is_null()) return NULL;
1398
1399 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1400 return JNIHandles::make_local(env, result);
1401 }
1402
1403 // the resource area must be registered in case of a gc
1404 RegisterArrayForGC ragc(thread, local_array);
1405 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1406 local_array->length(), CHECK_NULL);
1407 objArrayHandle h_context(thread, context);
1408 for (int index = 0; index < local_array->length(); index++) {
1409 h_context->obj_at_put(index, local_array->at(index));
1410 }
1411
1412 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1413
1414 return JNIHandles::make_local(env, result);
1415 JVM_END
1416
1417
1418 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1419 JVMWrapper("JVM_IsArrayClass");
1420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1421 return (k != NULL) && k->oop_is_array() ? true : false;
1422 JVM_END
1423
1424
1425 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1426 JVMWrapper("JVM_IsPrimitiveClass");
1427 oop mirror = JNIHandles::resolve_non_null(cls);
1428 return (jboolean) java_lang_Class::is_primitive(mirror);
1429 JVM_END
1430
1431
1432 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1433 JVMWrapper("JVM_GetClassModifiers");
1434 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1435 // Primitive type
1436 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1437 }
1438
1439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1440 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1441 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1442 return k->modifier_flags();
1443 JVM_END
1444
1445
1446 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1447
1448 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1449 JvmtiVMObjectAllocEventCollector oam;
1450 // ofClass is a reference to a java_lang_Class object. The mirror object
1451 // of an InstanceKlass
1452
1453 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1454 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1455 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1456 return (jobjectArray)JNIHandles::make_local(env, result);
1457 }
1458
1459 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1460 InnerClassesIterator iter(k);
1461
1462 if (iter.length() == 0) {
1463 // Neither an inner nor outer class
1464 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1465 return (jobjectArray)JNIHandles::make_local(env, result);
1466 }
1467
1468 // find inner class info
1469 constantPoolHandle cp(thread, k->constants());
1470 int length = iter.length();
1471
1472 // Allocate temp. result array
1473 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1474 objArrayHandle result (THREAD, r);
1475 int members = 0;
1476
1477 for (; !iter.done(); iter.next()) {
1478 int ioff = iter.inner_class_info_index();
1479 int ooff = iter.outer_class_info_index();
1480
1481 if (ioff != 0 && ooff != 0) {
1482 // Check to see if the name matches the class we're looking for
1483 // before attempting to find the class.
1484 if (cp->klass_name_at_matches(k, ooff)) {
1485 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1486 if (outer_klass == k()) {
1487 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1488 instanceKlassHandle inner_klass (THREAD, ik);
1489
1490 // Throws an exception if outer klass has not declared k as
1491 // an inner klass
1492 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1493
1494 result->obj_at_put(members, inner_klass->java_mirror());
1495 members++;
1496 }
1497 }
1498 }
1499 }
1500
1501 if (members != length) {
1502 // Return array of right length
1503 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1504 for(int i = 0; i < members; i++) {
1505 res->obj_at_put(i, result->obj_at(i));
1506 }
1507 return (jobjectArray)JNIHandles::make_local(env, res);
1508 }
1509
1510 return (jobjectArray)JNIHandles::make_local(env, result());
1511 JVM_END
1512
1513
1514 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1515 {
1516 // ofClass is a reference to a java_lang_Class object.
1517 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1518 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1519 return NULL;
1520 }
1521
1522 bool inner_is_member = false;
1523 Klass* outer_klass
1524 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1525 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1526 if (outer_klass == NULL) return NULL; // already a top-level class
1527 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1528 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1529 }
1530 JVM_END
1531
1532 // should be in InstanceKlass.cpp, but is here for historical reasons
1533 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1534 bool* inner_is_member,
1535 TRAPS) {
1536 Thread* thread = THREAD;
1537 InnerClassesIterator iter(k);
1538 if (iter.length() == 0) {
1539 // No inner class info => no declaring class
1540 return NULL;
1541 }
1542
1543 constantPoolHandle i_cp(thread, k->constants());
1544
1545 bool found = false;
1546 Klass* ok;
1547 instanceKlassHandle outer_klass;
1548 *inner_is_member = false;
1549
1550 // Find inner_klass attribute
1551 for (; !iter.done() && !found; iter.next()) {
1552 int ioff = iter.inner_class_info_index();
1553 int ooff = iter.outer_class_info_index();
1554 int noff = iter.inner_name_index();
1555 if (ioff != 0) {
1556 // Check to see if the name matches the class we're looking for
1557 // before attempting to find the class.
1558 if (i_cp->klass_name_at_matches(k, ioff)) {
1559 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1560 found = (k() == inner_klass);
1561 if (found && ooff != 0) {
1562 ok = i_cp->klass_at(ooff, CHECK_NULL);
1563 outer_klass = instanceKlassHandle(thread, ok);
1564 *inner_is_member = true;
1565 }
1566 }
1567 }
1568 }
1569
1570 if (found && outer_klass.is_null()) {
1571 // It may be anonymous; try for that.
1572 int encl_method_class_idx = k->enclosing_method_class_index();
1573 if (encl_method_class_idx != 0) {
1574 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1575 outer_klass = instanceKlassHandle(thread, ok);
1576 *inner_is_member = false;
1577 }
1578 }
1579
1580 // If no inner class attribute found for this class.
1581 if (outer_klass.is_null()) return NULL;
1582
1583 // Throws an exception if outer klass has not declared k as an inner klass
1584 // We need evidence that each klass knows about the other, or else
1585 // the system could allow a spoof of an inner class to gain access rights.
1586 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1587 return outer_klass();
1588 }
1589
1590 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1591 assert (cls != NULL, "illegal class");
1592 JVMWrapper("JVM_GetClassSignature");
1593 JvmtiVMObjectAllocEventCollector oam;
1594 ResourceMark rm(THREAD);
1595 // Return null for arrays and primatives
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 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1600 if (sym == NULL) return NULL;
1601 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1602 return (jstring) JNIHandles::make_local(env, str());
1603 }
1604 }
1605 return NULL;
1606 JVM_END
1607
1608
1609 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1610 assert (cls != NULL, "illegal class");
1611 JVMWrapper("JVM_GetClassAnnotations");
1612
1613 // Return null for arrays and primitives
1614 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1615 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1616 if (k->oop_is_instance()) {
1617 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1618 return (jbyteArray) JNIHandles::make_local(env, a);
1619 }
1620 }
1621 return NULL;
1622 JVM_END
1623
1624
1625 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1626 // some of this code was adapted from from jni_FromReflectedField
1627
1628 oop reflected = JNIHandles::resolve_non_null(field);
1629 oop mirror = java_lang_reflect_Field::clazz(reflected);
1630 Klass* k = java_lang_Class::as_Klass(mirror);
1631 int slot = java_lang_reflect_Field::slot(reflected);
1632 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1633
1634 KlassHandle kh(THREAD, k);
1635 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1636
1637 if (modifiers & JVM_ACC_STATIC) {
1638 // for static fields we only look in the current class
1639 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1640 assert(false, "cannot find static field");
1641 return false;
1642 }
1643 } else {
1644 // for instance fields we start with the current class and work
1645 // our way up through the superclass chain
1646 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1647 assert(false, "cannot find instance field");
1648 return false;
1649 }
1650 }
1651 return true;
1652 }
1653
1654 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1655 // field is a handle to a java.lang.reflect.Field object
1656 assert(field != NULL, "illegal field");
1657 JVMWrapper("JVM_GetFieldAnnotations");
1658
1659 fieldDescriptor fd;
1660 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1661 if (!gotFd) {
1662 return NULL;
1663 }
1664
1665 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1666 JVM_END
1667
1668
1669 static Method* jvm_get_method_common(jobject method) {
1670 // some of this code was adapted from from jni_FromReflectedMethod
1671
1672 oop reflected = JNIHandles::resolve_non_null(method);
1673 oop mirror = NULL;
1674 int slot = 0;
1675
1676 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1677 mirror = java_lang_reflect_Constructor::clazz(reflected);
1678 slot = java_lang_reflect_Constructor::slot(reflected);
1679 } else {
1680 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1681 "wrong type");
1682 mirror = java_lang_reflect_Method::clazz(reflected);
1683 slot = java_lang_reflect_Method::slot(reflected);
1684 }
1685 Klass* k = java_lang_Class::as_Klass(mirror);
1686
1687 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1688 assert(m != NULL, "cannot find method");
1689 return m; // caller has to deal with NULL in product mode
1690 }
1691
1692
1693 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1694 JVMWrapper("JVM_GetMethodAnnotations");
1695
1696 // method is a handle to a java.lang.reflect.Method object
1697 Method* m = jvm_get_method_common(method);
1698 if (m == NULL) {
1699 return NULL;
1700 }
1701
1702 return (jbyteArray) JNIHandles::make_local(env,
1703 Annotations::make_java_array(m->annotations(), THREAD));
1704 JVM_END
1705
1706
1707 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1708 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1709
1710 // method is a handle to a java.lang.reflect.Method object
1711 Method* m = jvm_get_method_common(method);
1712 if (m == NULL) {
1713 return NULL;
1714 }
1715
1716 return (jbyteArray) JNIHandles::make_local(env,
1717 Annotations::make_java_array(m->annotation_default(), THREAD));
1718 JVM_END
1719
1720
1721 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1722 JVMWrapper("JVM_GetMethodParameterAnnotations");
1723
1724 // method is a handle to a java.lang.reflect.Method object
1725 Method* m = jvm_get_method_common(method);
1726 if (m == NULL) {
1727 return NULL;
1728 }
1729
1730 return (jbyteArray) JNIHandles::make_local(env,
1731 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1732 JVM_END
1733
1734 /* Type use annotations support (JDK 1.8) */
1735
1736 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1737 assert (cls != NULL, "illegal class");
1738 JVMWrapper("JVM_GetClassTypeAnnotations");
1739 ResourceMark rm(THREAD);
1740 // Return null for arrays and primitives
1741 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1742 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1743 if (k->oop_is_instance()) {
1744 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1745 if (type_annotations != NULL) {
1746 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1747 return (jbyteArray) JNIHandles::make_local(env, a);
1748 }
1749 }
1750 }
1751 return NULL;
1752 JVM_END
1753
1754 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1755 assert (method != NULL, "illegal method");
1756 JVMWrapper("JVM_GetMethodTypeAnnotations");
1757
1758 // method is a handle to a java.lang.reflect.Method object
1759 Method* m = jvm_get_method_common(method);
1760 if (m == NULL) {
1761 return NULL;
1762 }
1763
1764 AnnotationArray* type_annotations = m->type_annotations();
1765 if (type_annotations != NULL) {
1766 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1767 return (jbyteArray) JNIHandles::make_local(env, a);
1768 }
1769
1770 return NULL;
1771 JVM_END
1772
1773 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1774 assert (field != NULL, "illegal field");
1775 JVMWrapper("JVM_GetFieldTypeAnnotations");
1776
1777 fieldDescriptor fd;
1778 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1779 if (!gotFd) {
1780 return NULL;
1781 }
1782
1783 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1784 JVM_END
1785
1786 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1787 if (!cp->is_within_bounds(index)) {
1788 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1789 }
1790 }
1791
1792 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1793 {
1794 JVMWrapper("JVM_GetMethodParameters");
1795 // method is a handle to a java.lang.reflect.Method object
1796 Method* method_ptr = jvm_get_method_common(method);
1797 methodHandle mh (THREAD, method_ptr);
1798 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1799 const int num_params = mh->method_parameters_length();
1800
1801 if (0 != num_params) {
1802 // make sure all the symbols are properly formatted
1803 for (int i = 0; i < num_params; i++) {
1804 MethodParametersElement* params = mh->method_parameters_start();
1805 int index = params[i].name_cp_index;
1806 bounds_check(mh->constants(), index, CHECK_NULL);
1807
1808 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1809 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1810 "Wrong type at constant pool index");
1811 }
1812
1813 }
1814
1815 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1816 objArrayHandle result (THREAD, result_oop);
1817
1818 for (int i = 0; i < num_params; i++) {
1819 MethodParametersElement* params = mh->method_parameters_start();
1820 // For a 0 index, give a NULL symbol
1821 Symbol* sym = 0 != params[i].name_cp_index ?
1822 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1823 int flags = params[i].flags;
1824 oop param = Reflection::new_parameter(reflected_method, i, sym,
1825 flags, CHECK_NULL);
1826 result->obj_at_put(i, param);
1827 }
1828 return (jobjectArray)JNIHandles::make_local(env, result());
1829 } else {
1830 return (jobjectArray)NULL;
1831 }
1832 }
1833 JVM_END
1834
1835 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1836
1837 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1838 {
1839 JVMWrapper("JVM_GetClassDeclaredFields");
1840 JvmtiVMObjectAllocEventCollector oam;
1841
1842 // Exclude primitive types and array types
1843 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1844 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1845 // Return empty array
1846 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1847 return (jobjectArray) JNIHandles::make_local(env, res);
1848 }
1849
1850 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1851 constantPoolHandle cp(THREAD, k->constants());
1852
1853 // Ensure class is linked
1854 k->link_class(CHECK_NULL);
1855
1856 // 4496456 We need to filter out java.lang.Throwable.backtrace
1857 bool skip_backtrace = false;
1858
1859 // Allocate result
1860 int num_fields;
1861
1862 if (publicOnly) {
1863 num_fields = 0;
1864 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1865 if (fs.access_flags().is_public()) ++num_fields;
1866 }
1867 } else {
1868 num_fields = k->java_fields_count();
1869
1870 if (k() == SystemDictionary::Throwable_klass()) {
1871 num_fields--;
1872 skip_backtrace = true;
1873 }
1874 }
1875
1876 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1877 objArrayHandle result (THREAD, r);
1878
1879 int out_idx = 0;
1880 fieldDescriptor fd;
1881 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1882 if (skip_backtrace) {
1883 // 4496456 skip java.lang.Throwable.backtrace
1884 int offset = fs.offset();
1885 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1886 }
1887
1888 if (!publicOnly || fs.access_flags().is_public()) {
1889 fd.reinitialize(k(), fs.index());
1890 oop field = Reflection::new_field(&fd, CHECK_NULL);
1891 result->obj_at_put(out_idx, field);
1892 ++out_idx;
1893 }
1894 }
1895 assert(out_idx == num_fields, "just checking");
1896 return (jobjectArray) JNIHandles::make_local(env, result());
1897 }
1898 JVM_END
1899
1900 static bool select_method(methodHandle method, bool want_constructor) {
1901 if (want_constructor) {
1902 return (method->is_initializer() && !method->is_static());
1903 } else {
1904 return (!method->is_initializer() && !method->is_overpass());
1905 }
1906 }
1907
1908 static jobjectArray get_class_declared_methods_helper(
1909 JNIEnv *env,
1910 jclass ofClass, jboolean publicOnly,
1911 bool want_constructor,
1912 Klass* klass, TRAPS) {
1913
1914 JvmtiVMObjectAllocEventCollector oam;
1915
1916 // Exclude primitive types and array types
1917 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1918 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1919 // Return empty array
1920 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1921 return (jobjectArray) JNIHandles::make_local(env, res);
1922 }
1923
1924 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1925
1926 // Ensure class is linked
1927 k->link_class(CHECK_NULL);
1928
1929 Array<Method*>* methods = k->methods();
1930 int methods_length = methods->length();
1931
1932 // Save original method_idnum in case of redefinition, which can change
1933 // the idnum of obsolete methods. The new method will have the same idnum
1934 // but if we refresh the methods array, the counts will be wrong.
1935 ResourceMark rm(THREAD);
1936 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1937 int num_methods = 0;
1938
1939 for (int i = 0; i < methods_length; i++) {
1940 methodHandle method(THREAD, methods->at(i));
1941 if (select_method(method, want_constructor)) {
1942 if (!publicOnly || method->is_public()) {
1943 idnums->push(method->method_idnum());
1944 ++num_methods;
1945 }
1946 }
1947 }
1948
1949 // Allocate result
1950 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1951 objArrayHandle result (THREAD, r);
1952
1953 // Now just put the methods that we selected above, but go by their idnum
1954 // in case of redefinition. The methods can be redefined at any safepoint,
1955 // so above when allocating the oop array and below when creating reflect
1956 // objects.
1957 for (int i = 0; i < num_methods; i++) {
1958 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1959 if (method.is_null()) {
1960 // Method may have been deleted and seems this API can handle null
1961 // Otherwise should probably put a method that throws NSME
1962 result->obj_at_put(i, NULL);
1963 } else {
1964 oop m;
1965 if (want_constructor) {
1966 m = Reflection::new_constructor(method, CHECK_NULL);
1967 } else {
1968 m = Reflection::new_method(method, false, CHECK_NULL);
1969 }
1970 result->obj_at_put(i, m);
1971 }
1972 }
1973
1974 return (jobjectArray) JNIHandles::make_local(env, result());
1975 }
1976
1977 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1978 {
1979 JVMWrapper("JVM_GetClassDeclaredMethods");
1980 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1981 /*want_constructor*/ false,
1982 SystemDictionary::reflect_Method_klass(), THREAD);
1983 }
1984 JVM_END
1985
1986 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1987 {
1988 JVMWrapper("JVM_GetClassDeclaredConstructors");
1989 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1990 /*want_constructor*/ true,
1991 SystemDictionary::reflect_Constructor_klass(), THREAD);
1992 }
1993 JVM_END
1994
1995 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1996 {
1997 JVMWrapper("JVM_GetClassAccessFlags");
1998 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1999 // Primitive type
2000 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2001 }
2002
2003 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2004 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2005 }
2006 JVM_END
2007
2008
2009 // Constant pool access //////////////////////////////////////////////////////////
2010
2011 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2012 {
2013 JVMWrapper("JVM_GetClassConstantPool");
2014 JvmtiVMObjectAllocEventCollector oam;
2015
2016 // Return null for primitives and arrays
2017 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2018 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2019 if (k->oop_is_instance()) {
2020 instanceKlassHandle k_h(THREAD, k);
2021 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2022 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2023 return JNIHandles::make_local(jcp());
2024 }
2025 }
2026 return NULL;
2027 }
2028 JVM_END
2029
2030
2031 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2032 {
2033 JVMWrapper("JVM_ConstantPoolGetSize");
2034 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2035 return cp->length();
2036 }
2037 JVM_END
2038
2039
2040 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2041 {
2042 JVMWrapper("JVM_ConstantPoolGetClassAt");
2043 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2044 bounds_check(cp, index, CHECK_NULL);
2045 constantTag tag = cp->tag_at(index);
2046 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2048 }
2049 Klass* k = cp->klass_at(index, CHECK_NULL);
2050 return (jclass) JNIHandles::make_local(k->java_mirror());
2051 }
2052 JVM_END
2053
2054 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2055 {
2056 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2057 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058 bounds_check(cp, index, CHECK_NULL);
2059 constantTag tag = cp->tag_at(index);
2060 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2061 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2062 }
2063 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2064 if (k == NULL) return NULL;
2065 return (jclass) JNIHandles::make_local(k->java_mirror());
2066 }
2067 JVM_END
2068
2069 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2070 constantTag tag = cp->tag_at(index);
2071 if (!tag.is_method() && !tag.is_interface_method()) {
2072 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073 }
2074 int klass_ref = cp->uncached_klass_ref_index_at(index);
2075 Klass* k_o;
2076 if (force_resolution) {
2077 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2078 } else {
2079 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2080 if (k_o == NULL) return NULL;
2081 }
2082 instanceKlassHandle k(THREAD, k_o);
2083 Symbol* name = cp->uncached_name_ref_at(index);
2084 Symbol* sig = cp->uncached_signature_ref_at(index);
2085 methodHandle m (THREAD, k->find_method(name, sig));
2086 if (m.is_null()) {
2087 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2088 }
2089 oop method;
2090 if (!m->is_initializer() || m->is_static()) {
2091 method = Reflection::new_method(m, true, CHECK_NULL);
2092 } else {
2093 method = Reflection::new_constructor(m, CHECK_NULL);
2094 }
2095 return JNIHandles::make_local(method);
2096 }
2097
2098 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2099 {
2100 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2101 JvmtiVMObjectAllocEventCollector oam;
2102 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2103 bounds_check(cp, index, CHECK_NULL);
2104 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2105 return res;
2106 }
2107 JVM_END
2108
2109 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2110 {
2111 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2112 JvmtiVMObjectAllocEventCollector oam;
2113 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2114 bounds_check(cp, index, CHECK_NULL);
2115 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2116 return res;
2117 }
2118 JVM_END
2119
2120 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2121 constantTag tag = cp->tag_at(index);
2122 if (!tag.is_field()) {
2123 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124 }
2125 int klass_ref = cp->uncached_klass_ref_index_at(index);
2126 Klass* k_o;
2127 if (force_resolution) {
2128 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2129 } else {
2130 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2131 if (k_o == NULL) return NULL;
2132 }
2133 instanceKlassHandle k(THREAD, k_o);
2134 Symbol* name = cp->uncached_name_ref_at(index);
2135 Symbol* sig = cp->uncached_signature_ref_at(index);
2136 fieldDescriptor fd;
2137 Klass* target_klass = k->find_field(name, sig, &fd);
2138 if (target_klass == NULL) {
2139 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2140 }
2141 oop field = Reflection::new_field(&fd, CHECK_NULL);
2142 return JNIHandles::make_local(field);
2143 }
2144
2145 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2146 {
2147 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2148 JvmtiVMObjectAllocEventCollector oam;
2149 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2150 bounds_check(cp, index, CHECK_NULL);
2151 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2152 return res;
2153 }
2154 JVM_END
2155
2156 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2159 JvmtiVMObjectAllocEventCollector oam;
2160 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2161 bounds_check(cp, index, CHECK_NULL);
2162 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2163 return res;
2164 }
2165 JVM_END
2166
2167 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2168 {
2169 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2170 JvmtiVMObjectAllocEventCollector oam;
2171 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2172 bounds_check(cp, index, CHECK_NULL);
2173 constantTag tag = cp->tag_at(index);
2174 if (!tag.is_field_or_method()) {
2175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2176 }
2177 int klass_ref = cp->uncached_klass_ref_index_at(index);
2178 Symbol* klass_name = cp->klass_name_at(klass_ref);
2179 Symbol* member_name = cp->uncached_name_ref_at(index);
2180 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2181 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2182 objArrayHandle dest(THREAD, dest_o);
2183 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2184 dest->obj_at_put(0, str());
2185 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2186 dest->obj_at_put(1, str());
2187 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2188 dest->obj_at_put(2, str());
2189 return (jobjectArray) JNIHandles::make_local(dest());
2190 }
2191 JVM_END
2192
2193 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2194 {
2195 JVMWrapper("JVM_ConstantPoolGetIntAt");
2196 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_0);
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_int()) {
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 return cp->int_at(index);
2203 }
2204 JVM_END
2205
2206 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2207 {
2208 JVMWrapper("JVM_ConstantPoolGetLongAt");
2209 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2210 bounds_check(cp, index, CHECK_(0L));
2211 constantTag tag = cp->tag_at(index);
2212 if (!tag.is_long()) {
2213 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2214 }
2215 return cp->long_at(index);
2216 }
2217 JVM_END
2218
2219 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2220 {
2221 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2222 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2223 bounds_check(cp, index, CHECK_(0.0f));
2224 constantTag tag = cp->tag_at(index);
2225 if (!tag.is_float()) {
2226 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2227 }
2228 return cp->float_at(index);
2229 }
2230 JVM_END
2231
2232 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2233 {
2234 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2235 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2236 bounds_check(cp, index, CHECK_(0.0));
2237 constantTag tag = cp->tag_at(index);
2238 if (!tag.is_double()) {
2239 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2240 }
2241 return cp->double_at(index);
2242 }
2243 JVM_END
2244
2245 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2246 {
2247 JVMWrapper("JVM_ConstantPoolGetStringAt");
2248 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2249 bounds_check(cp, index, CHECK_NULL);
2250 constantTag tag = cp->tag_at(index);
2251 if (!tag.is_string()) {
2252 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2253 }
2254 oop str = cp->string_at(index, CHECK_NULL);
2255 return (jstring) JNIHandles::make_local(str);
2256 }
2257 JVM_END
2258
2259 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2260 {
2261 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2262 JvmtiVMObjectAllocEventCollector oam;
2263 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2264 bounds_check(cp, index, CHECK_NULL);
2265 constantTag tag = cp->tag_at(index);
2266 if (!tag.is_symbol()) {
2267 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2268 }
2269 Symbol* sym = cp->symbol_at(index);
2270 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2271 return (jstring) JNIHandles::make_local(str());
2272 }
2273 JVM_END
2274
2275
2276 // Assertion support. //////////////////////////////////////////////////////////
2277
2278 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2279 JVMWrapper("JVM_DesiredAssertionStatus");
2280 assert(cls != NULL, "bad class");
2281
2282 oop r = JNIHandles::resolve(cls);
2283 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2284 if (java_lang_Class::is_primitive(r)) return false;
2285
2286 Klass* k = java_lang_Class::as_Klass(r);
2287 assert(k->oop_is_instance(), "must be an instance klass");
2288 if (! k->oop_is_instance()) return false;
2289
2290 ResourceMark rm(THREAD);
2291 const char* name = k->name()->as_C_string();
2292 bool system_class = k->class_loader() == NULL;
2293 return JavaAssertions::enabled(name, system_class);
2294
2295 JVM_END
2296
2297
2298 // Return a new AssertionStatusDirectives object with the fields filled in with
2299 // command-line assertion arguments (i.e., -ea, -da).
2300 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2301 JVMWrapper("JVM_AssertionStatusDirectives");
2302 JvmtiVMObjectAllocEventCollector oam;
2303 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2304 return JNIHandles::make_local(env, asd);
2305 JVM_END
2306
2307 // Verification ////////////////////////////////////////////////////////////////////////////////
2308
2309 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2310
2311 // RedefineClasses support: bug 6214132 caused verification to fail.
2312 // All functions from this section should call the jvmtiThreadSate function:
2313 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2314 // The function returns a Klass* of the _scratch_class if the verifier
2315 // was invoked in the middle of the class redefinition.
2316 // Otherwise it returns its argument value which is the _the_class Klass*.
2317 // Please, refer to the description in the jvmtiThreadSate.hpp.
2318
2319 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2320 JVMWrapper("JVM_GetClassNameUTF");
2321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 return k->name()->as_utf8();
2324 JVM_END
2325
2326
2327 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2328 JVMWrapper("JVM_GetClassCPTypes");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 // types will have length zero if this is not an InstanceKlass
2332 // (length is determined by call to JVM_GetClassCPEntriesCount)
2333 if (k->oop_is_instance()) {
2334 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2335 for (int index = cp->length() - 1; index >= 0; index--) {
2336 constantTag tag = cp->tag_at(index);
2337 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2338 }
2339 }
2340 JVM_END
2341
2342
2343 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2344 JVMWrapper("JVM_GetClassCPEntriesCount");
2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 if (!k->oop_is_instance())
2348 return 0;
2349 return InstanceKlass::cast(k)->constants()->length();
2350 JVM_END
2351
2352
2353 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2354 JVMWrapper("JVM_GetClassFieldsCount");
2355 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2357 if (!k->oop_is_instance())
2358 return 0;
2359 return InstanceKlass::cast(k)->java_fields_count();
2360 JVM_END
2361
2362
2363 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2364 JVMWrapper("JVM_GetClassMethodsCount");
2365 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 if (!k->oop_is_instance())
2368 return 0;
2369 return InstanceKlass::cast(k)->methods()->length();
2370 JVM_END
2371
2372
2373 // The following methods, used for the verifier, are never called with
2374 // array klasses, so a direct cast to InstanceKlass is safe.
2375 // Typically, these methods are called in a loop with bounds determined
2376 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2377 // zero for arrays.
2378 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2379 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2383 int length = method->checked_exceptions_length();
2384 if (length > 0) {
2385 CheckedExceptionElement* table= method->checked_exceptions_start();
2386 for (int i = 0; i < length; i++) {
2387 exceptions[i] = table[i].class_cp_index;
2388 }
2389 }
2390 JVM_END
2391
2392
2393 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2394 JVMWrapper("JVM_GetMethodIxExceptionsCount");
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->checked_exceptions_length();
2399 JVM_END
2400
2401
2402 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2403 JVMWrapper("JVM_GetMethodIxByteCode");
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 memcpy(code, method->code_base(), method->code_size());
2408 JVM_END
2409
2410
2411 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2412 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2414 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2415 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2416 return method->code_size();
2417 JVM_END
2418
2419
2420 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2421 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2422 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2423 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2424 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2425 ExceptionTable extable(method);
2426 entry->start_pc = extable.start_pc(entry_index);
2427 entry->end_pc = extable.end_pc(entry_index);
2428 entry->handler_pc = extable.handler_pc(entry_index);
2429 entry->catchType = extable.catch_type_index(entry_index);
2430 JVM_END
2431
2432
2433 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2434 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2438 return method->exception_table_length();
2439 JVM_END
2440
2441
2442 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2443 JVMWrapper("JVM_GetMethodIxModifiers");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2447 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2448 JVM_END
2449
2450
2451 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2452 JVMWrapper("JVM_GetFieldIxModifiers");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2456 JVM_END
2457
2458
2459 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2460 JVMWrapper("JVM_GetMethodIxLocalsCount");
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->max_locals();
2465 JVM_END
2466
2467
2468 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2469 JVMWrapper("JVM_GetMethodIxArgsSize");
2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2473 return method->size_of_parameters();
2474 JVM_END
2475
2476
2477 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2478 JVMWrapper("JVM_GetMethodIxMaxStack");
2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2482 return method->verifier_max_stack();
2483 JVM_END
2484
2485
2486 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2487 JVMWrapper("JVM_IsConstructorIx");
2488 ResourceMark rm(THREAD);
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() == vmSymbols::object_initializer_name();
2493 JVM_END
2494
2495
2496 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2497 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2498 ResourceMark rm(THREAD);
2499 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2500 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2501 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2502 return method->is_overpass();
2503 JVM_END
2504
2505 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2506 JVMWrapper("JVM_GetMethodIxIxUTF");
2507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2510 return method->name()->as_utf8();
2511 JVM_END
2512
2513
2514 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2515 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2516 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2517 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2518 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2519 return method->signature()->as_utf8();
2520 JVM_END
2521
2522 /**
2523 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2524 * read entries in the constant pool. Since the old verifier always
2525 * works on a copy of the code, it will not see any rewriting that
2526 * may possibly occur in the middle of verification. So it is important
2527 * that nothing it calls tries to use the cpCache instead of the raw
2528 * constant pool, so we must use cp->uncached_x methods when appropriate.
2529 */
2530 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2531 JVMWrapper("JVM_GetCPFieldNameUTF");
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2535 switch (cp->tag_at(cp_index).value()) {
2536 case JVM_CONSTANT_Fieldref:
2537 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2538 default:
2539 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2540 }
2541 ShouldNotReachHere();
2542 return NULL;
2543 JVM_END
2544
2545
2546 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2547 JVMWrapper("JVM_GetCPMethodNameUTF");
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_name_ref_at(cp_index)->as_utf8();
2556 default:
2557 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2558 }
2559 ShouldNotReachHere();
2560 return NULL;
2561 JVM_END
2562
2563
2564 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2565 JVMWrapper("JVM_GetCPMethodSignatureUTF");
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_InterfaceMethodref:
2571 case JVM_CONSTANT_Methodref:
2572 case JVM_CONSTANT_NameAndType: // for invokedynamic
2573 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2574 default:
2575 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2576 }
2577 ShouldNotReachHere();
2578 return NULL;
2579 JVM_END
2580
2581
2582 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2583 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref:
2589 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2590 default:
2591 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return NULL;
2595 JVM_END
2596
2597
2598 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2599 JVMWrapper("JVM_GetCPClassNameUTF");
2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2602 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2603 Symbol* classname = cp->klass_name_at(cp_index);
2604 return classname->as_utf8();
2605 JVM_END
2606
2607
2608 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2609 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2610 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2611 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2612 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2613 switch (cp->tag_at(cp_index).value()) {
2614 case JVM_CONSTANT_Fieldref: {
2615 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2616 Symbol* classname = cp->klass_name_at(class_index);
2617 return classname->as_utf8();
2618 }
2619 default:
2620 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2621 }
2622 ShouldNotReachHere();
2623 return NULL;
2624 JVM_END
2625
2626
2627 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2628 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2629 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2630 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2631 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2632 switch (cp->tag_at(cp_index).value()) {
2633 case JVM_CONSTANT_Methodref:
2634 case JVM_CONSTANT_InterfaceMethodref: {
2635 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2636 Symbol* classname = cp->klass_name_at(class_index);
2637 return classname->as_utf8();
2638 }
2639 default:
2640 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2641 }
2642 ShouldNotReachHere();
2643 return NULL;
2644 JVM_END
2645
2646
2647 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2648 JVMWrapper("JVM_GetCPFieldModifiers");
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2651 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2652 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2653 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2654 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2655 switch (cp->tag_at(cp_index).value()) {
2656 case JVM_CONSTANT_Fieldref: {
2657 Symbol* name = cp->uncached_name_ref_at(cp_index);
2658 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2659 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2660 if (fs.name() == name && fs.signature() == signature) {
2661 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2662 }
2663 }
2664 return -1;
2665 }
2666 default:
2667 fatal("JVM_GetCPFieldModifiers: illegal constant");
2668 }
2669 ShouldNotReachHere();
2670 return 0;
2671 JVM_END
2672
2673
2674 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2675 JVMWrapper("JVM_GetCPMethodModifiers");
2676 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2677 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2678 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2679 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2680 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2681 switch (cp->tag_at(cp_index).value()) {
2682 case JVM_CONSTANT_Methodref:
2683 case JVM_CONSTANT_InterfaceMethodref: {
2684 Symbol* name = cp->uncached_name_ref_at(cp_index);
2685 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2686 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2687 int methods_count = methods->length();
2688 for (int i = 0; i < methods_count; i++) {
2689 Method* method = methods->at(i);
2690 if (method->name() == name && method->signature() == signature) {
2691 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2692 }
2693 }
2694 return -1;
2695 }
2696 default:
2697 fatal("JVM_GetCPMethodModifiers: illegal constant");
2698 }
2699 ShouldNotReachHere();
2700 return 0;
2701 JVM_END
2702
2703
2704 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2705
2706 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2707 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2708 JVM_END
2709
2710
2711 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2712 JVMWrapper("JVM_IsSameClassPackage");
2713 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2714 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2715 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2716 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2717 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2718 JVM_END
2719
2720
2721 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2722
2723 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2724 JVMWrapper2("JVM_Open (%s)", fname);
2725
2726 //%note jvm_r6
2727 int result = os::open(fname, flags, mode);
2728 if (result >= 0) {
2729 return result;
2730 } else {
2731 switch(errno) {
2732 case EEXIST:
2733 return JVM_EEXIST;
2734 default:
2735 return -1;
2736 }
2737 }
2738 JVM_END
2739
2740
2741 JVM_LEAF(jint, JVM_Close(jint fd))
2742 JVMWrapper2("JVM_Close (0x%x)", fd);
2743 //%note jvm_r6
2744 return os::close(fd);
2745 JVM_END
2746
2747
2748 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2749 JVMWrapper2("JVM_Read (0x%x)", fd);
2750
2751 //%note jvm_r6
2752 return (jint)os::restartable_read(fd, buf, nbytes);
2753 JVM_END
2754
2755
2756 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2757 JVMWrapper2("JVM_Write (0x%x)", fd);
2758
2759 //%note jvm_r6
2760 return (jint)os::write(fd, buf, nbytes);
2761 JVM_END
2762
2763
2764 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2765 JVMWrapper2("JVM_Available (0x%x)", fd);
2766 //%note jvm_r6
2767 return os::available(fd, pbytes);
2768 JVM_END
2769
2770
2771 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2772 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2773 //%note jvm_r6
2774 return os::lseek(fd, offset, whence);
2775 JVM_END
2776
2777
2778 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2779 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2780 return os::ftruncate(fd, length);
2781 JVM_END
2782
2783
2784 JVM_LEAF(jint, JVM_Sync(jint fd))
2785 JVMWrapper2("JVM_Sync (0x%x)", fd);
2786 //%note jvm_r6
2787 return os::fsync(fd);
2788 JVM_END
2789
2790
2791 // Printing support //////////////////////////////////////////////////
2792 extern "C" {
2793
2794 ATTRIBUTE_PRINTF(3, 0)
2795 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2796 // see bug 4399518, 4417214
2797 if ((intptr_t)count <= 0) return -1;
2798 return vsnprintf(str, count, fmt, args);
2799 }
2800
2801 ATTRIBUTE_PRINTF(3, 0)
2802 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2803 va_list args;
2804 int len;
2805 va_start(args, fmt);
2806 len = jio_vsnprintf(str, count, fmt, args);
2807 va_end(args);
2808 return len;
2809 }
2810
2811 ATTRIBUTE_PRINTF(2,3)
2812 int jio_fprintf(FILE* f, const char *fmt, ...) {
2813 int len;
2814 va_list args;
2815 va_start(args, fmt);
2816 len = jio_vfprintf(f, fmt, args);
2817 va_end(args);
2818 return len;
2819 }
2820
2821 ATTRIBUTE_PRINTF(2, 0)
2822 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2823 if (Arguments::vfprintf_hook() != NULL) {
2824 return Arguments::vfprintf_hook()(f, fmt, args);
2825 } else {
2826 return vfprintf(f, fmt, args);
2827 }
2828 }
2829
2830 ATTRIBUTE_PRINTF(1, 2)
2831 JNIEXPORT int jio_printf(const char *fmt, ...) {
2832 int len;
2833 va_list args;
2834 va_start(args, fmt);
2835 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2836 va_end(args);
2837 return len;
2838 }
2839
2840
2841 // HotSpot specific jio method
2842 void jio_print(const char* s) {
2843 // Try to make this function as atomic as possible.
2844 if (Arguments::vfprintf_hook() != NULL) {
2845 jio_fprintf(defaultStream::output_stream(), "%s", s);
2846 } else {
2847 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2848 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2849 }
2850 }
2851
2852 } // Extern C
2853
2854 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2855
2856 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2857 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2858 // OSThread objects. The exception to this rule is when the target object is the thread
2859 // doing the operation, in which case we know that the thread won't exit until the
2860 // operation is done (all exits being voluntary). There are a few cases where it is
2861 // rather silly to do operations on yourself, like resuming yourself or asking whether
2862 // you are alive. While these can still happen, they are not subject to deadlocks if
2863 // the lock is held while the operation occurs (this is not the case for suspend, for
2864 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2865 // implementation is local to this file, we always lock Threads_lock for that one.
2866
2867 static void thread_entry(JavaThread* thread, TRAPS) {
2868 HandleMark hm(THREAD);
2869 Handle obj(THREAD, thread->threadObj());
2870 JavaValue result(T_VOID);
2871 JavaCalls::call_virtual(&result,
2872 obj,
2873 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2874 vmSymbols::run_method_name(),
2875 vmSymbols::void_method_signature(),
2876 THREAD);
2877 }
2878
2879
2880 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2881 JVMWrapper("JVM_StartThread");
2882 JavaThread *native_thread = NULL;
2883
2884 // We cannot hold the Threads_lock when we throw an exception,
2885 // due to rank ordering issues. Example: we might need to grab the
2886 // Heap_lock while we construct the exception.
2887 bool throw_illegal_thread_state = false;
2888
2889 // We must release the Threads_lock before we can post a jvmti event
2890 // in Thread::start.
2891 {
2892 // Ensure that the C++ Thread and OSThread structures aren't freed before
2893 // we operate.
2894 MutexLocker mu(Threads_lock);
2895
2896 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2897 // re-starting an already started thread, so we should usually find
2898 // that the JavaThread is null. However for a JNI attached thread
2899 // there is a small window between the Thread object being created
2900 // (with its JavaThread set) and the update to its threadStatus, so we
2901 // have to check for this
2902 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2903 throw_illegal_thread_state = true;
2904 } else {
2905 // We could also check the stillborn flag to see if this thread was already stopped, but
2906 // for historical reasons we let the thread detect that itself when it starts running
2907
2908 jlong size =
2909 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2910 // Allocate the C++ Thread structure and create the native thread. The
2911 // stack size retrieved from java is signed, but the constructor takes
2912 // size_t (an unsigned type), so avoid passing negative values which would
2913 // result in really large stacks.
2914 size_t sz = size > 0 ? (size_t) size : 0;
2915 native_thread = new JavaThread(&thread_entry, sz);
2916
2917 // At this point it may be possible that no osthread was created for the
2918 // JavaThread due to lack of memory. Check for this situation and throw
2919 // an exception if necessary. Eventually we may want to change this so
2920 // that we only grab the lock if the thread was created successfully -
2921 // then we can also do this check and throw the exception in the
2922 // JavaThread constructor.
2923 if (native_thread->osthread() != NULL) {
2924 // Note: the current thread is not being used within "prepare".
2925 native_thread->prepare(jthread);
2926 }
2927 }
2928 }
2929
2930 if (throw_illegal_thread_state) {
2931 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2932 }
2933
2934 assert(native_thread != NULL, "Starting null thread?");
2935
2936 if (native_thread->osthread() == NULL) {
2937 // No one should hold a reference to the 'native_thread'.
2938 delete native_thread;
2939 if (JvmtiExport::should_post_resource_exhausted()) {
2940 JvmtiExport::post_resource_exhausted(
2941 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2942 os::native_thread_creation_failed_msg());
2943 }
2944 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2945 os::native_thread_creation_failed_msg());
2946 }
2947
2948 Thread::start(native_thread);
2949
2950 JVM_END
2951
2952 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2953 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2954 // but is thought to be reliable and simple. In the case, where the receiver is the
2955 // same thread as the sender, no safepoint is needed.
2956 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2957 JVMWrapper("JVM_StopThread");
2958
2959 oop java_throwable = JNIHandles::resolve(throwable);
2960 if (java_throwable == NULL) {
2961 THROW(vmSymbols::java_lang_NullPointerException());
2962 }
2963 oop java_thread = JNIHandles::resolve_non_null(jthread);
2964 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2965 Events::log_exception(JavaThread::current(),
2966 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2967 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2968 // First check if thread is alive
2969 if (receiver != NULL) {
2970 // Check if exception is getting thrown at self (use oop equality, since the
2971 // target object might exit)
2972 if (java_thread == thread->threadObj()) {
2973 THROW_OOP(java_throwable);
2974 } else {
2975 // Enques a VM_Operation to stop all threads and then deliver the exception...
2976 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2977 }
2978 }
2979 else {
2980 // Either:
2981 // - target thread has not been started before being stopped, or
2982 // - target thread already terminated
2983 // We could read the threadStatus to determine which case it is
2984 // but that is overkill as it doesn't matter. We must set the
2985 // stillborn flag for the first case, and if the thread has already
2986 // exited setting this flag has no affect
2987 java_lang_Thread::set_stillborn(java_thread);
2988 }
2989 JVM_END
2990
2991
2992 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2993 JVMWrapper("JVM_IsThreadAlive");
2994
2995 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2996 return java_lang_Thread::is_alive(thread_oop);
2997 JVM_END
2998
2999
3000 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3001 JVMWrapper("JVM_SuspendThread");
3002 oop java_thread = JNIHandles::resolve_non_null(jthread);
3003 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3004
3005 if (receiver != NULL) {
3006 // thread has run and has not exited (still on threads list)
3007
3008 {
3009 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3010 if (receiver->is_external_suspend()) {
3011 // Don't allow nested external suspend requests. We can't return
3012 // an error from this interface so just ignore the problem.
3013 return;
3014 }
3015 if (receiver->is_exiting()) { // thread is in the process of exiting
3016 return;
3017 }
3018 receiver->set_external_suspend();
3019 }
3020
3021 // java_suspend() will catch threads in the process of exiting
3022 // and will ignore them.
3023 receiver->java_suspend();
3024
3025 // It would be nice to have the following assertion in all the
3026 // time, but it is possible for a racing resume request to have
3027 // resumed this thread right after we suspended it. Temporarily
3028 // enable this assertion if you are chasing a different kind of
3029 // bug.
3030 //
3031 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3032 // receiver->is_being_ext_suspended(), "thread is not suspended");
3033 }
3034 JVM_END
3035
3036
3037 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3038 JVMWrapper("JVM_ResumeThread");
3039 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3040 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3041 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3042 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3043 // looks at it.
3044 MutexLocker ml(Threads_lock);
3045 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3046 if (thr != NULL) {
3047 // the thread has run and is not in the process of exiting
3048 thr->java_resume();
3049 }
3050 JVM_END
3051
3052
3053 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3054 JVMWrapper("JVM_SetThreadPriority");
3055 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3056 MutexLocker ml(Threads_lock);
3057 oop java_thread = JNIHandles::resolve_non_null(jthread);
3058 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3059 JavaThread* thr = java_lang_Thread::thread(java_thread);
3060 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3061 Thread::set_priority(thr, (ThreadPriority)prio);
3062 }
3063 JVM_END
3064
3065
3066 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3067 JVMWrapper("JVM_Yield");
3068 if (os::dont_yield()) return;
3069 HOTSPOT_THREAD_YIELD();
3070
3071 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3072 // Critical for similar threading behaviour
3073 if (ConvertYieldToSleep) {
3074 os::sleep(thread, MinSleepInterval, false);
3075 } else {
3076 os::naked_yield();
3077 }
3078 JVM_END
3079
3080
3081 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3082 JVMWrapper("JVM_Sleep");
3083
3084 if (millis < 0) {
3085 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3086 }
3087
3088 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3089 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3090 }
3091
3092 // Save current thread state and restore it at the end of this block.
3093 // And set new thread state to SLEEPING.
3094 JavaThreadSleepState jtss(thread);
3095
3096 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3097
3098 EventThreadSleep event;
3099
3100 if (millis == 0) {
3101 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3102 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3103 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3104 // for SOLARIS
3105 if (ConvertSleepToYield) {
3106 os::naked_yield();
3107 } else {
3108 ThreadState old_state = thread->osthread()->get_state();
3109 thread->osthread()->set_state(SLEEPING);
3110 os::sleep(thread, MinSleepInterval, false);
3111 thread->osthread()->set_state(old_state);
3112 }
3113 } else {
3114 ThreadState old_state = thread->osthread()->get_state();
3115 thread->osthread()->set_state(SLEEPING);
3116 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3117 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3118 // us while we were sleeping. We do not overwrite those.
3119 if (!HAS_PENDING_EXCEPTION) {
3120 if (event.should_commit()) {
3121 event.set_time(millis);
3122 event.commit();
3123 }
3124 HOTSPOT_THREAD_SLEEP_END(1);
3125
3126 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3127 // to properly restore the thread state. That's likely wrong.
3128 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3129 }
3130 }
3131 thread->osthread()->set_state(old_state);
3132 }
3133 if (event.should_commit()) {
3134 event.set_time(millis);
3135 event.commit();
3136 }
3137 HOTSPOT_THREAD_SLEEP_END(0);
3138 JVM_END
3139
3140 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3141 JVMWrapper("JVM_CurrentThread");
3142 oop jthread = thread->threadObj();
3143 assert (thread != NULL, "no current thread!");
3144 return JNIHandles::make_local(env, jthread);
3145 JVM_END
3146
3147
3148 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3149 JVMWrapper("JVM_CountStackFrames");
3150
3151 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3152 oop java_thread = JNIHandles::resolve_non_null(jthread);
3153 bool throw_illegal_thread_state = false;
3154 int count = 0;
3155
3156 {
3157 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3158 // We need to re-resolve the java_thread, since a GC might have happened during the
3159 // acquire of the lock
3160 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3161
3162 if (thr == NULL) {
3163 // do nothing
3164 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3165 // Check whether this java thread has been suspended already. If not, throws
3166 // IllegalThreadStateException. We defer to throw that exception until
3167 // Threads_lock is released since loading exception class has to leave VM.
3168 // The correct way to test a thread is actually suspended is
3169 // wait_for_ext_suspend_completion(), but we can't call that while holding
3170 // the Threads_lock. The above tests are sufficient for our purposes
3171 // provided the walkability of the stack is stable - which it isn't
3172 // 100% but close enough for most practical purposes.
3173 throw_illegal_thread_state = true;
3174 } else {
3175 // Count all java activation, i.e., number of vframes
3176 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3177 // Native frames are not counted
3178 if (!vfst.method()->is_native()) count++;
3179 }
3180 }
3181 }
3182
3183 if (throw_illegal_thread_state) {
3184 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3185 "this thread is not suspended");
3186 }
3187 return count;
3188 JVM_END
3189
3190 // Consider: A better way to implement JVM_Interrupt() is to acquire
3191 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3192 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3193 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3194 // outside the critical section. Threads_lock is hot so we want to minimize
3195 // the hold-time. A cleaner interface would be to decompose interrupt into
3196 // two steps. The 1st phase, performed under Threads_lock, would return
3197 // a closure that'd be invoked after Threads_lock was dropped.
3198 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3199 // admit spurious wakeups.
3200
3201 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3202 JVMWrapper("JVM_Interrupt");
3203
3204 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3205 oop java_thread = JNIHandles::resolve_non_null(jthread);
3206 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3207 // We need to re-resolve the java_thread, since a GC might have happened during the
3208 // acquire of the lock
3209 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3210 if (thr != NULL) {
3211 Thread::interrupt(thr);
3212 }
3213 JVM_END
3214
3215
3216 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3217 JVMWrapper("JVM_IsInterrupted");
3218
3219 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3220 oop java_thread = JNIHandles::resolve_non_null(jthread);
3221 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3222 // We need to re-resolve the java_thread, since a GC might have happened during the
3223 // acquire of the lock
3224 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3225 if (thr == NULL) {
3226 return JNI_FALSE;
3227 } else {
3228 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3229 }
3230 JVM_END
3231
3232
3233 // Return true iff the current thread has locked the object passed in
3234
3235 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3236 JVMWrapper("JVM_HoldsLock");
3237 assert(THREAD->is_Java_thread(), "sanity check");
3238 if (obj == NULL) {
3239 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3240 }
3241 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3242 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3243 JVM_END
3244
3245
3246 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3247 JVMWrapper("JVM_DumpAllStacks");
3248 VM_PrintThreads op;
3249 VMThread::execute(&op);
3250 if (JvmtiExport::should_post_data_dump()) {
3251 JvmtiExport::post_data_dump();
3252 }
3253 JVM_END
3254
3255 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3256 JVMWrapper("JVM_SetNativeThreadName");
3257 ResourceMark rm(THREAD);
3258 oop java_thread = JNIHandles::resolve_non_null(jthread);
3259 JavaThread* thr = java_lang_Thread::thread(java_thread);
3260 // Thread naming only supported for the current thread, doesn't work for
3261 // target threads.
3262 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3263 // we don't set the name of an attached thread to avoid stepping
3264 // on other programs
3265 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3266 os::set_native_thread_name(thread_name);
3267 }
3268 JVM_END
3269
3270 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3271
3272 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3273 assert(jthread->is_Java_thread(), "must be a Java thread");
3274 if (jthread->privileged_stack_top() == NULL) return false;
3275 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3276 oop loader = jthread->privileged_stack_top()->class_loader();
3277 if (loader == NULL) return true;
3278 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3279 if (trusted) return true;
3280 }
3281 return false;
3282 }
3283
3284 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3285 JVMWrapper("JVM_CurrentLoadedClass");
3286 ResourceMark rm(THREAD);
3287
3288 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3289 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3290 bool trusted = is_trusted_frame(thread, &vfst);
3291 if (trusted) return NULL;
3292
3293 Method* m = vfst.method();
3294 if (!m->is_native()) {
3295 InstanceKlass* holder = m->method_holder();
3296 oop loader = holder->class_loader();
3297 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3298 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3299 }
3300 }
3301 }
3302 return NULL;
3303 JVM_END
3304
3305
3306 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3307 JVMWrapper("JVM_CurrentClassLoader");
3308 ResourceMark rm(THREAD);
3309
3310 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3311
3312 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3313 bool trusted = is_trusted_frame(thread, &vfst);
3314 if (trusted) return NULL;
3315
3316 Method* m = vfst.method();
3317 if (!m->is_native()) {
3318 InstanceKlass* holder = m->method_holder();
3319 assert(holder->is_klass(), "just checking");
3320 oop loader = holder->class_loader();
3321 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3322 return JNIHandles::make_local(env, loader);
3323 }
3324 }
3325 }
3326 return NULL;
3327 JVM_END
3328
3329
3330 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3331 JVMWrapper("JVM_GetClassContext");
3332 ResourceMark rm(THREAD);
3333 JvmtiVMObjectAllocEventCollector oam;
3334 vframeStream vfst(thread);
3335
3336 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3337 // This must only be called from SecurityManager.getClassContext
3338 Method* m = vfst.method();
3339 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3340 m->name() == vmSymbols::getClassContext_name() &&
3341 m->signature() == vmSymbols::void_class_array_signature())) {
3342 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3343 }
3344 }
3345
3346 // Collect method holders
3347 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3348 for (; !vfst.at_end(); vfst.security_next()) {
3349 Method* m = vfst.method();
3350 // Native frames are not returned
3351 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3352 Klass* holder = m->method_holder();
3353 assert(holder->is_klass(), "just checking");
3354 klass_array->append(holder);
3355 }
3356 }
3357
3358 // Create result array of type [Ljava/lang/Class;
3359 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3360 // Fill in mirrors corresponding to method holders
3361 for (int i = 0; i < klass_array->length(); i++) {
3362 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3363 }
3364
3365 return (jobjectArray) JNIHandles::make_local(env, result);
3366 JVM_END
3367
3368
3369 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3370 JVMWrapper("JVM_ClassDepth");
3371 ResourceMark rm(THREAD);
3372 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3373 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3374
3375 const char* str = java_lang_String::as_utf8_string(class_name_str());
3376 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3377 if (class_name_sym == NULL) {
3378 return -1;
3379 }
3380
3381 int depth = 0;
3382
3383 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3384 if (!vfst.method()->is_native()) {
3385 InstanceKlass* holder = vfst.method()->method_holder();
3386 assert(holder->is_klass(), "just checking");
3387 if (holder->name() == class_name_sym) {
3388 return depth;
3389 }
3390 depth++;
3391 }
3392 }
3393 return -1;
3394 JVM_END
3395
3396
3397 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3398 JVMWrapper("JVM_ClassLoaderDepth");
3399 ResourceMark rm(THREAD);
3400 int depth = 0;
3401 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3402 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3403 bool trusted = is_trusted_frame(thread, &vfst);
3404 if (trusted) return -1;
3405
3406 Method* m = vfst.method();
3407 if (!m->is_native()) {
3408 InstanceKlass* holder = m->method_holder();
3409 assert(holder->is_klass(), "just checking");
3410 oop loader = holder->class_loader();
3411 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3412 return depth;
3413 }
3414 depth++;
3415 }
3416 }
3417 return -1;
3418 JVM_END
3419
3420
3421 // java.lang.Package ////////////////////////////////////////////////////////////////
3422
3423
3424 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3425 JVMWrapper("JVM_GetSystemPackage");
3426 ResourceMark rm(THREAD);
3427 JvmtiVMObjectAllocEventCollector oam;
3428 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3429 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3430 return (jstring) JNIHandles::make_local(result);
3431 JVM_END
3432
3433
3434 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3435 JVMWrapper("JVM_GetSystemPackages");
3436 JvmtiVMObjectAllocEventCollector oam;
3437 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3438 return (jobjectArray) JNIHandles::make_local(result);
3439 JVM_END
3440
3441
3442 // ObjectInputStream ///////////////////////////////////////////////////////////////
3443
3444 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3445 if (current_class == NULL) {
3446 return true;
3447 }
3448 if ((current_class == field_class) || access.is_public()) {
3449 return true;
3450 }
3451
3452 if (access.is_protected()) {
3453 // See if current_class is a subclass of field_class
3454 if (current_class->is_subclass_of(field_class)) {
3455 return true;
3456 }
3457 }
3458
3459 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3460 }
3461
3462
3463 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3464 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3465 JVMWrapper("JVM_AllocateNewObject");
3466 JvmtiVMObjectAllocEventCollector oam;
3467 // Receiver is not used
3468 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3469 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3470
3471 // Cannot instantiate primitive types
3472 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3473 ResourceMark rm(THREAD);
3474 THROW_0(vmSymbols::java_lang_InvalidClassException());
3475 }
3476
3477 // Arrays not allowed here, must use JVM_AllocateNewArray
3478 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3479 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3480 ResourceMark rm(THREAD);
3481 THROW_0(vmSymbols::java_lang_InvalidClassException());
3482 }
3483
3484 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3485 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3486
3487 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3488
3489 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3490 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3491
3492 // Make sure klass is initialized, since we are about to instantiate one of them.
3493 curr_klass->initialize(CHECK_NULL);
3494
3495 methodHandle m (THREAD,
3496 init_klass->find_method(vmSymbols::object_initializer_name(),
3497 vmSymbols::void_method_signature()));
3498 if (m.is_null()) {
3499 ResourceMark rm(THREAD);
3500 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3501 Method::name_and_sig_as_C_string(init_klass(),
3502 vmSymbols::object_initializer_name(),
3503 vmSymbols::void_method_signature()));
3504 }
3505
3506 if (curr_klass == init_klass && !m->is_public()) {
3507 // Calling the constructor for class 'curr_klass'.
3508 // Only allow calls to a public no-arg constructor.
3509 // This path corresponds to creating an Externalizable object.
3510 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3511 }
3512
3513 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3514 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3515 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3516 }
3517
3518 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3519 // Call constructor m. This might call a constructor higher up in the hierachy
3520 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3521
3522 return JNIHandles::make_local(obj());
3523 JVM_END
3524
3525
3526 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3527 JVMWrapper("JVM_AllocateNewArray");
3528 JvmtiVMObjectAllocEventCollector oam;
3529 oop mirror = JNIHandles::resolve_non_null(currClass);
3530
3531 if (java_lang_Class::is_primitive(mirror)) {
3532 THROW_0(vmSymbols::java_lang_InvalidClassException());
3533 }
3534 Klass* k = java_lang_Class::as_Klass(mirror);
3535 oop result;
3536
3537 if (k->oop_is_typeArray()) {
3538 // typeArray
3539 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3540 } else if (k->oop_is_objArray()) {
3541 // objArray
3542 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3543 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3544 result = oak->allocate(length, CHECK_NULL);
3545 } else {
3546 THROW_0(vmSymbols::java_lang_InvalidClassException());
3547 }
3548 return JNIHandles::make_local(env, result);
3549 JVM_END
3550
3551
3552 // Return the first non-null class loader up the execution stack, or null
3553 // if only code from the null class loader is on the stack.
3554
3555 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3556 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3557 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3558 oop loader = vfst.method()->method_holder()->class_loader();
3559 if (loader != NULL) {
3560 return JNIHandles::make_local(env, loader);
3561 }
3562 }
3563 return NULL;
3564 JVM_END
3565
3566
3567 // Load a class relative to the most recent class on the stack with a non-null
3568 // classloader.
3569 // This function has been deprecated and should not be considered part of the
3570 // specified JVM interface.
3571
3572 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3573 jclass currClass, jstring currClassName))
3574 JVMWrapper("JVM_LoadClass0");
3575 // Receiver is not used
3576 ResourceMark rm(THREAD);
3577
3578 // Class name argument is not guaranteed to be in internal format
3579 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3580 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3581
3582 const char* str = java_lang_String::as_utf8_string(string());
3583
3584 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3585 // It's impossible to create this class; the name cannot fit
3586 // into the constant pool.
3587 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3588 }
3589
3590 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3591 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3592 // Find the most recent class on the stack with a non-null classloader
3593 oop loader = NULL;
3594 oop protection_domain = NULL;
3595 if (curr_klass.is_null()) {
3596 for (vframeStream vfst(thread);
3597 !vfst.at_end() && loader == NULL;
3598 vfst.next()) {
3599 if (!vfst.method()->is_native()) {
3600 InstanceKlass* holder = vfst.method()->method_holder();
3601 loader = holder->class_loader();
3602 protection_domain = holder->protection_domain();
3603 }
3604 }
3605 } else {
3606 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3607 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3608 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3609 }
3610 Handle h_loader(THREAD, loader);
3611 Handle h_prot (THREAD, protection_domain);
3612 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3613 false, thread);
3614 if (TraceClassResolution && result != NULL) {
3615 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3616 }
3617 return result;
3618 JVM_END
3619
3620
3621 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3622
3623
3624 // resolve array handle and check arguments
3625 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3626 if (arr == NULL) {
3627 THROW_0(vmSymbols::java_lang_NullPointerException());
3628 }
3629 oop a = JNIHandles::resolve_non_null(arr);
3630 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3631 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3632 }
3633 return arrayOop(a);
3634 }
3635
3636
3637 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3638 JVMWrapper("JVM_GetArrayLength");
3639 arrayOop a = check_array(env, arr, false, CHECK_0);
3640 return a->length();
3641 JVM_END
3642
3643
3644 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3645 JVMWrapper("JVM_Array_Get");
3646 JvmtiVMObjectAllocEventCollector oam;
3647 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3648 jvalue value;
3649 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3650 oop box = Reflection::box(&value, type, CHECK_NULL);
3651 return JNIHandles::make_local(env, box);
3652 JVM_END
3653
3654
3655 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3656 JVMWrapper("JVM_GetPrimitiveArrayElement");
3657 jvalue value;
3658 value.i = 0; // to initialize value before getting used in CHECK
3659 arrayOop a = check_array(env, arr, true, CHECK_(value));
3660 assert(a->is_typeArray(), "just checking");
3661 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3662 BasicType wide_type = (BasicType) wCode;
3663 if (type != wide_type) {
3664 Reflection::widen(&value, type, wide_type, CHECK_(value));
3665 }
3666 return value;
3667 JVM_END
3668
3669
3670 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3671 JVMWrapper("JVM_SetArrayElement");
3672 arrayOop a = check_array(env, arr, false, CHECK);
3673 oop box = JNIHandles::resolve(val);
3674 jvalue value;
3675 value.i = 0; // to initialize value before getting used in CHECK
3676 BasicType value_type;
3677 if (a->is_objArray()) {
3678 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3679 value_type = Reflection::unbox_for_regular_object(box, &value);
3680 } else {
3681 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3682 }
3683 Reflection::array_set(&value, a, index, value_type, CHECK);
3684 JVM_END
3685
3686
3687 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3688 JVMWrapper("JVM_SetPrimitiveArrayElement");
3689 arrayOop a = check_array(env, arr, true, CHECK);
3690 assert(a->is_typeArray(), "just checking");
3691 BasicType value_type = (BasicType) vCode;
3692 Reflection::array_set(&v, a, index, value_type, CHECK);
3693 JVM_END
3694
3695
3696 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3697 JVMWrapper("JVM_NewArray");
3698 JvmtiVMObjectAllocEventCollector oam;
3699 oop element_mirror = JNIHandles::resolve(eltClass);
3700 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3701 return JNIHandles::make_local(env, result);
3702 JVM_END
3703
3704
3705 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3706 JVMWrapper("JVM_NewMultiArray");
3707 JvmtiVMObjectAllocEventCollector oam;
3708 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3709 oop element_mirror = JNIHandles::resolve(eltClass);
3710 assert(dim_array->is_typeArray(), "just checking");
3711 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3712 return JNIHandles::make_local(env, result);
3713 JVM_END
3714
3715
3716 // Networking library support ////////////////////////////////////////////////////////////////////
3717
3718 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3719 JVMWrapper("JVM_InitializeSocketLibrary");
3720 return 0;
3721 JVM_END
3722
3723
3724 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3725 JVMWrapper("JVM_Socket");
3726 return os::socket(domain, type, protocol);
3727 JVM_END
3728
3729
3730 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3731 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3732 //%note jvm_r6
3733 return os::socket_close(fd);
3734 JVM_END
3735
3736
3737 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3738 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3739 //%note jvm_r6
3740 return os::socket_shutdown(fd, howto);
3741 JVM_END
3742
3743
3744 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3745 JVMWrapper2("JVM_Recv (0x%x)", fd);
3746 //%note jvm_r6
3747 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3748 JVM_END
3749
3750
3751 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3752 JVMWrapper2("JVM_Send (0x%x)", fd);
3753 //%note jvm_r6
3754 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3755 JVM_END
3756
3757
3758 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3759 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3760 //%note jvm_r6
3761 return os::timeout(fd, timeout);
3762 JVM_END
3763
3764
3765 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3766 JVMWrapper2("JVM_Listen (0x%x)", fd);
3767 //%note jvm_r6
3768 return os::listen(fd, count);
3769 JVM_END
3770
3771
3772 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3773 JVMWrapper2("JVM_Connect (0x%x)", fd);
3774 //%note jvm_r6
3775 return os::connect(fd, him, (socklen_t)len);
3776 JVM_END
3777
3778
3779 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3780 JVMWrapper2("JVM_Bind (0x%x)", fd);
3781 //%note jvm_r6
3782 return os::bind(fd, him, (socklen_t)len);
3783 JVM_END
3784
3785
3786 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3787 JVMWrapper2("JVM_Accept (0x%x)", fd);
3788 //%note jvm_r6
3789 socklen_t socklen = (socklen_t)(*len);
3790 jint result = os::accept(fd, him, &socklen);
3791 *len = (jint)socklen;
3792 return result;
3793 JVM_END
3794
3795
3796 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3797 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3798 //%note jvm_r6
3799 socklen_t socklen = (socklen_t)(*fromlen);
3800 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3801 *fromlen = (int)socklen;
3802 return result;
3803 JVM_END
3804
3805
3806 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3807 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3808 //%note jvm_r6
3809 socklen_t socklen = (socklen_t)(*len);
3810 jint result = os::get_sock_name(fd, him, &socklen);
3811 *len = (int)socklen;
3812 return result;
3813 JVM_END
3814
3815
3816 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3817 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3818 //%note jvm_r6
3819 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3820 JVM_END
3821
3822
3823 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3824 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3825 //%note jvm_r6
3826 return os::socket_available(fd, pbytes);
3827 JVM_END
3828
3829
3830 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3831 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3832 //%note jvm_r6
3833 socklen_t socklen = (socklen_t)(*optlen);
3834 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3835 *optlen = (int)socklen;
3836 return result;
3837 JVM_END
3838
3839
3840 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3841 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3842 //%note jvm_r6
3843 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3844 JVM_END
3845
3846
3847 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3848 JVMWrapper("JVM_GetHostName");
3849 return os::get_host_name(name, namelen);
3850 JVM_END
3851
3852
3853 // Library support ///////////////////////////////////////////////////////////////////////////
3854
3855 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3856 //%note jvm_ct
3857 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3858 char ebuf[1024];
3859 void *load_result;
3860 {
3861 ThreadToNativeFromVM ttnfvm(thread);
3862 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3863 }
3864 if (load_result == NULL) {
3865 char msg[1024];
3866 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3867 // Since 'ebuf' may contain a string encoded using
3868 // platform encoding scheme, we need to pass
3869 // Exceptions::unsafe_to_utf8 to the new_exception method
3870 // as the last argument. See bug 6367357.
3871 Handle h_exception =
3872 Exceptions::new_exception(thread,
3873 vmSymbols::java_lang_UnsatisfiedLinkError(),
3874 msg, Exceptions::unsafe_to_utf8);
3875
3876 THROW_HANDLE_0(h_exception);
3877 }
3878 return load_result;
3879 JVM_END
3880
3881
3882 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3883 JVMWrapper("JVM_UnloadLibrary");
3884 os::dll_unload(handle);
3885 JVM_END
3886
3887
3888 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3889 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3890 return os::dll_lookup(handle, name);
3891 JVM_END
3892
3893
3894 // Floating point support ////////////////////////////////////////////////////////////////////
3895
3896 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3897 JVMWrapper("JVM_IsNaN");
3898 return g_isnan(a);
3899 JVM_END
3900
3901
3902 // JNI version ///////////////////////////////////////////////////////////////////////////////
3903
3904 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3905 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3906 return Threads::is_supported_jni_version_including_1_1(version);
3907 JVM_END
3908
3909
3910 // String support ///////////////////////////////////////////////////////////////////////////
3911
3912 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3913 JVMWrapper("JVM_InternString");
3914 JvmtiVMObjectAllocEventCollector oam;
3915 if (str == NULL) return NULL;
3916 oop string = JNIHandles::resolve_non_null(str);
3917 oop result = StringTable::intern(string, CHECK_NULL);
3918 return (jstring) JNIHandles::make_local(env, result);
3919 JVM_END
3920
3921
3922 // Raw monitor support //////////////////////////////////////////////////////////////////////
3923
3924 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3925 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3926 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3927 // that only works with java threads.
3928
3929
3930 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3931 VM_Exit::block_if_vm_exited();
3932 JVMWrapper("JVM_RawMonitorCreate");
3933 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3934 }
3935
3936
3937 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3938 VM_Exit::block_if_vm_exited();
3939 JVMWrapper("JVM_RawMonitorDestroy");
3940 delete ((Mutex*) mon);
3941 }
3942
3943
3944 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3945 VM_Exit::block_if_vm_exited();
3946 JVMWrapper("JVM_RawMonitorEnter");
3947 ((Mutex*) mon)->jvm_raw_lock();
3948 return 0;
3949 }
3950
3951
3952 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3953 VM_Exit::block_if_vm_exited();
3954 JVMWrapper("JVM_RawMonitorExit");
3955 ((Mutex*) mon)->jvm_raw_unlock();
3956 }
3957
3958
3959 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3960
3961 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3962 Handle loader, Handle protection_domain,
3963 jboolean throwError, TRAPS) {
3964 // Security Note:
3965 // The Java level wrapper will perform the necessary security check allowing
3966 // us to pass the NULL as the initiating class loader. The VM is responsible for
3967 // the checkPackageAccess relative to the initiating class loader via the
3968 // protection_domain. The protection_domain is passed as NULL by the java code
3969 // if there is no security manager in 3-arg Class.forName().
3970 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3971
3972 KlassHandle klass_handle(THREAD, klass);
3973 // Check if we should initialize the class
3974 if (init && klass_handle->oop_is_instance()) {
3975 klass_handle->initialize(CHECK_NULL);
3976 }
3977 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3978 }
3979
3980
3981 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3982
3983 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3984 JVMWrapper("JVM_InvokeMethod");
3985 Handle method_handle;
3986 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3987 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3988 Handle receiver(THREAD, JNIHandles::resolve(obj));
3989 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3990 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3991 jobject res = JNIHandles::make_local(env, result);
3992 if (JvmtiExport::should_post_vm_object_alloc()) {
3993 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3994 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3995 if (java_lang_Class::is_primitive(ret_type)) {
3996 // Only for primitive type vm allocates memory for java object.
3997 // See box() method.
3998 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3999 }
4000 }
4001 return res;
4002 } else {
4003 THROW_0(vmSymbols::java_lang_StackOverflowError());
4004 }
4005 JVM_END
4006
4007
4008 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4009 JVMWrapper("JVM_NewInstanceFromConstructor");
4010 oop constructor_mirror = JNIHandles::resolve(c);
4011 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4012 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4013 jobject res = JNIHandles::make_local(env, result);
4014 if (JvmtiExport::should_post_vm_object_alloc()) {
4015 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4016 }
4017 return res;
4018 JVM_END
4019
4020 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4021
4022 JVM_LEAF(jboolean, JVM_SupportsCX8())
4023 JVMWrapper("JVM_SupportsCX8");
4024 return VM_Version::supports_cx8();
4025 JVM_END
4026
4027
4028 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4029 JVMWrapper("JVM_CX8Field");
4030 jlong res;
4031 oop o = JNIHandles::resolve(obj);
4032 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4033 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4034
4035 assert(VM_Version::supports_cx8(), "cx8 not supported");
4036 res = Atomic::cmpxchg(newVal, addr, oldVal);
4037
4038 return res == oldVal;
4039 JVM_END
4040
4041 // DTrace ///////////////////////////////////////////////////////////////////
4042
4043 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4044 JVMWrapper("JVM_DTraceGetVersion");
4045 return (jint)JVM_TRACING_DTRACE_VERSION;
4046 JVM_END
4047
4048 JVM_ENTRY(jlong,JVM_DTraceActivate(
4049 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4050 JVM_DTraceProvider* providers))
4051 JVMWrapper("JVM_DTraceActivate");
4052 return DTraceJSDT::activate(
4053 version, module_name, providers_count, providers, CHECK_0);
4054 JVM_END
4055
4056 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4057 JVMWrapper("JVM_DTraceIsProbeEnabled");
4058 return DTraceJSDT::is_probe_enabled(method);
4059 JVM_END
4060
4061 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4062 JVMWrapper("JVM_DTraceDispose");
4063 DTraceJSDT::dispose(handle);
4064 JVM_END
4065
4066 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4067 JVMWrapper("JVM_DTraceIsSupported");
4068 return DTraceJSDT::is_supported();
4069 JVM_END
4070
4071 // Returns an array of all live Thread objects (VM internal JavaThreads,
4072 // jvmti agent threads, and JNI attaching threads are skipped)
4073 // See CR 6404306 regarding JNI attaching threads
4074 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4075 ResourceMark rm(THREAD);
4076 ThreadsListEnumerator tle(THREAD, false, false);
4077 JvmtiVMObjectAllocEventCollector oam;
4078
4079 int num_threads = tle.num_threads();
4080 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4081 objArrayHandle threads_ah(THREAD, r);
4082
4083 for (int i = 0; i < num_threads; i++) {
4084 Handle h = tle.get_threadObj(i);
4085 threads_ah->obj_at_put(i, h());
4086 }
4087
4088 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4089 JVM_END
4090
4091
4092 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4093 // Return StackTraceElement[][], each element is the stack trace of a thread in
4094 // the corresponding entry in the given threads array
4095 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4096 JVMWrapper("JVM_DumpThreads");
4097 JvmtiVMObjectAllocEventCollector oam;
4098
4099 // Check if threads is null
4100 if (threads == NULL) {
4101 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4102 }
4103
4104 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4105 objArrayHandle ah(THREAD, a);
4106 int num_threads = ah->length();
4107 // check if threads is non-empty array
4108 if (num_threads == 0) {
4109 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4110 }
4111
4112 // check if threads is not an array of objects of Thread class
4113 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4114 if (k != SystemDictionary::Thread_klass()) {
4115 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4116 }
4117
4118 ResourceMark rm(THREAD);
4119
4120 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4121 for (int i = 0; i < num_threads; i++) {
4122 oop thread_obj = ah->obj_at(i);
4123 instanceHandle h(THREAD, (instanceOop) thread_obj);
4124 thread_handle_array->append(h);
4125 }
4126
4127 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4128 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4129
4130 JVM_END
4131
4132 // JVM monitoring and management support
4133 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4134 return Management::get_jmm_interface(version);
4135 JVM_END
4136
4137 // com.sun.tools.attach.VirtualMachine agent properties support
4138 //
4139 // Initialize the agent properties with the properties maintained in the VM
4140 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4141 JVMWrapper("JVM_InitAgentProperties");
4142 ResourceMark rm;
4143
4144 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4145
4146 PUTPROP(props, "sun.java.command", Arguments::java_command());
4147 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4148 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4149 return properties;
4150 JVM_END
4151
4152 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4153 {
4154 JVMWrapper("JVM_GetEnclosingMethodInfo");
4155 JvmtiVMObjectAllocEventCollector oam;
4156
4157 if (ofClass == NULL) {
4158 return NULL;
4159 }
4160 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4161 // Special handling for primitive objects
4162 if (java_lang_Class::is_primitive(mirror())) {
4163 return NULL;
4164 }
4165 Klass* k = java_lang_Class::as_Klass(mirror());
4166 if (!k->oop_is_instance()) {
4167 return NULL;
4168 }
4169 instanceKlassHandle ik_h(THREAD, k);
4170 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4171 if (encl_method_class_idx == 0) {
4172 return NULL;
4173 }
4174 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4175 objArrayHandle dest(THREAD, dest_o);
4176 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4177 dest->obj_at_put(0, enc_k->java_mirror());
4178 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4179 if (encl_method_method_idx != 0) {
4180 Symbol* sym = ik_h->constants()->symbol_at(
4181 extract_low_short_from_int(
4182 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4183 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4184 dest->obj_at_put(1, str());
4185 sym = ik_h->constants()->symbol_at(
4186 extract_high_short_from_int(
4187 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4188 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4189 dest->obj_at_put(2, str());
4190 }
4191 return (jobjectArray) JNIHandles::make_local(dest());
4192 }
4193 JVM_END
4194
4195 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4196 jint javaThreadState))
4197 {
4198 // If new thread states are added in future JDK and VM versions,
4199 // this should check if the JDK version is compatible with thread
4200 // states supported by the VM. Return NULL if not compatible.
4201 //
4202 // This function must map the VM java_lang_Thread::ThreadStatus
4203 // to the Java thread state that the JDK supports.
4204 //
4205
4206 typeArrayHandle values_h;
4207 switch (javaThreadState) {
4208 case JAVA_THREAD_STATE_NEW : {
4209 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4210 values_h = typeArrayHandle(THREAD, r);
4211 values_h->int_at_put(0, java_lang_Thread::NEW);
4212 break;
4213 }
4214 case JAVA_THREAD_STATE_RUNNABLE : {
4215 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4216 values_h = typeArrayHandle(THREAD, r);
4217 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4218 break;
4219 }
4220 case JAVA_THREAD_STATE_BLOCKED : {
4221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4222 values_h = typeArrayHandle(THREAD, r);
4223 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4224 break;
4225 }
4226 case JAVA_THREAD_STATE_WAITING : {
4227 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4228 values_h = typeArrayHandle(THREAD, r);
4229 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4230 values_h->int_at_put(1, java_lang_Thread::PARKED);
4231 break;
4232 }
4233 case JAVA_THREAD_STATE_TIMED_WAITING : {
4234 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4235 values_h = typeArrayHandle(THREAD, r);
4236 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4237 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4238 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4239 break;
4240 }
4241 case JAVA_THREAD_STATE_TERMINATED : {
4242 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4243 values_h = typeArrayHandle(THREAD, r);
4244 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4245 break;
4246 }
4247 default:
4248 // Unknown state - probably incompatible JDK version
4249 return NULL;
4250 }
4251
4252 return (jintArray) JNIHandles::make_local(env, values_h());
4253 }
4254 JVM_END
4255
4256
4257 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4258 jint javaThreadState,
4259 jintArray values))
4260 {
4261 // If new thread states are added in future JDK and VM versions,
4262 // this should check if the JDK version is compatible with thread
4263 // states supported by the VM. Return NULL if not compatible.
4264 //
4265 // This function must map the VM java_lang_Thread::ThreadStatus
4266 // to the Java thread state that the JDK supports.
4267 //
4268
4269 ResourceMark rm;
4270
4271 // Check if threads is null
4272 if (values == NULL) {
4273 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4274 }
4275
4276 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4277 typeArrayHandle values_h(THREAD, v);
4278
4279 objArrayHandle names_h;
4280 switch (javaThreadState) {
4281 case JAVA_THREAD_STATE_NEW : {
4282 assert(values_h->length() == 1 &&
4283 values_h->int_at(0) == java_lang_Thread::NEW,
4284 "Invalid threadStatus value");
4285
4286 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4287 1, /* only 1 substate */
4288 CHECK_NULL);
4289 names_h = objArrayHandle(THREAD, r);
4290 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4291 names_h->obj_at_put(0, name());
4292 break;
4293 }
4294 case JAVA_THREAD_STATE_RUNNABLE : {
4295 assert(values_h->length() == 1 &&
4296 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4297 "Invalid threadStatus value");
4298
4299 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4300 1, /* only 1 substate */
4301 CHECK_NULL);
4302 names_h = objArrayHandle(THREAD, r);
4303 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4304 names_h->obj_at_put(0, name());
4305 break;
4306 }
4307 case JAVA_THREAD_STATE_BLOCKED : {
4308 assert(values_h->length() == 1 &&
4309 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4310 "Invalid threadStatus value");
4311
4312 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4313 1, /* only 1 substate */
4314 CHECK_NULL);
4315 names_h = objArrayHandle(THREAD, r);
4316 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4317 names_h->obj_at_put(0, name());
4318 break;
4319 }
4320 case JAVA_THREAD_STATE_WAITING : {
4321 assert(values_h->length() == 2 &&
4322 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4323 values_h->int_at(1) == java_lang_Thread::PARKED,
4324 "Invalid threadStatus value");
4325 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4326 2, /* number of substates */
4327 CHECK_NULL);
4328 names_h = objArrayHandle(THREAD, r);
4329 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4330 CHECK_NULL);
4331 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4332 CHECK_NULL);
4333 names_h->obj_at_put(0, name0());
4334 names_h->obj_at_put(1, name1());
4335 break;
4336 }
4337 case JAVA_THREAD_STATE_TIMED_WAITING : {
4338 assert(values_h->length() == 3 &&
4339 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4340 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4341 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4342 "Invalid threadStatus value");
4343 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4344 3, /* number of substates */
4345 CHECK_NULL);
4346 names_h = objArrayHandle(THREAD, r);
4347 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4348 CHECK_NULL);
4349 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4350 CHECK_NULL);
4351 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4352 CHECK_NULL);
4353 names_h->obj_at_put(0, name0());
4354 names_h->obj_at_put(1, name1());
4355 names_h->obj_at_put(2, name2());
4356 break;
4357 }
4358 case JAVA_THREAD_STATE_TERMINATED : {
4359 assert(values_h->length() == 1 &&
4360 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4361 "Invalid threadStatus value");
4362 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4363 1, /* only 1 substate */
4364 CHECK_NULL);
4365 names_h = objArrayHandle(THREAD, r);
4366 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4367 names_h->obj_at_put(0, name());
4368 break;
4369 }
4370 default:
4371 // Unknown state - probably incompatible JDK version
4372 return NULL;
4373 }
4374 return (jobjectArray) JNIHandles::make_local(env, names_h());
4375 }
4376 JVM_END
4377
4378 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4379 {
4380 memset(info, 0, info_size);
4381
4382 info->jvm_version = Abstract_VM_Version::jvm_version();
4383 info->update_version = 0; /* 0 in HotSpot Express VM */
4384 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4385
4386 // when we add a new capability in the jvm_version_info struct, we should also
4387 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4388 // counter defined in runtimeService.cpp.
4389 info->is_attachable = AttachListener::is_attach_supported();
4390 }
4391 JVM_END