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 (num_params < 0) {
1802 // A -1 return value from method_parameters_length means there is no
1803 // parameter data. Return null to indicate this to the reflection
1804 // API.
1805 assert(num_params == -1);
1806 return (jobjectArray)NULL;
1807 } else {
1808 // Otherwise, we return something up to reflection, even if it is
1809 // a zero-length array. Why? Because in some cases this can
1810 // trigger a MalformedParametersException.
1811
1812 // make sure all the symbols are properly formatted
1813 for (int i = 0; i < num_params; i++) {
1814 MethodParametersElement* params = mh->method_parameters_start();
1815 int index = params[i].name_cp_index;
1816 bounds_check(mh->constants(), index, CHECK_NULL);
1817
1818 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1819 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1820 "Wrong type at constant pool index");
1821 }
1822
1823 }
1824
1825 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1826 objArrayHandle result (THREAD, result_oop);
1827
1828 for (int i = 0; i < num_params; i++) {
1829 MethodParametersElement* params = mh->method_parameters_start();
1830 // For a 0 index, give a NULL symbol
1831 Symbol* sym = 0 != params[i].name_cp_index ?
1832 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1833 int flags = params[i].flags;
1834 oop param = Reflection::new_parameter(reflected_method, i, sym,
1835 flags, CHECK_NULL);
1836 result->obj_at_put(i, param);
1837 }
1838 return (jobjectArray)JNIHandles::make_local(env, result());
1839 }
1840 }
1841 JVM_END
1842
1843 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1844
1845 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1846 {
1847 JVMWrapper("JVM_GetClassDeclaredFields");
1848 JvmtiVMObjectAllocEventCollector oam;
1849
1850 // Exclude primitive types and array types
1851 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1852 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1853 // Return empty array
1854 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1855 return (jobjectArray) JNIHandles::make_local(env, res);
1856 }
1857
1858 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1859 constantPoolHandle cp(THREAD, k->constants());
1860
1861 // Ensure class is linked
1862 k->link_class(CHECK_NULL);
1863
1864 // 4496456 We need to filter out java.lang.Throwable.backtrace
1865 bool skip_backtrace = false;
1866
1867 // Allocate result
1868 int num_fields;
1869
1870 if (publicOnly) {
1871 num_fields = 0;
1872 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1873 if (fs.access_flags().is_public()) ++num_fields;
1874 }
1875 } else {
1876 num_fields = k->java_fields_count();
1877
1878 if (k() == SystemDictionary::Throwable_klass()) {
1879 num_fields--;
1880 skip_backtrace = true;
1881 }
1882 }
1883
1884 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1885 objArrayHandle result (THREAD, r);
1886
1887 int out_idx = 0;
1888 fieldDescriptor fd;
1889 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1890 if (skip_backtrace) {
1891 // 4496456 skip java.lang.Throwable.backtrace
1892 int offset = fs.offset();
1893 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1894 }
1895
1896 if (!publicOnly || fs.access_flags().is_public()) {
1897 fd.reinitialize(k(), fs.index());
1898 oop field = Reflection::new_field(&fd, CHECK_NULL);
1899 result->obj_at_put(out_idx, field);
1900 ++out_idx;
1901 }
1902 }
1903 assert(out_idx == num_fields, "just checking");
1904 return (jobjectArray) JNIHandles::make_local(env, result());
1905 }
1906 JVM_END
1907
1908 static bool select_method(methodHandle method, bool want_constructor) {
1909 if (want_constructor) {
1910 return (method->is_initializer() && !method->is_static());
1911 } else {
1912 return (!method->is_initializer() && !method->is_overpass());
1913 }
1914 }
1915
1916 static jobjectArray get_class_declared_methods_helper(
1917 JNIEnv *env,
1918 jclass ofClass, jboolean publicOnly,
1919 bool want_constructor,
1920 Klass* klass, TRAPS) {
1921
1922 JvmtiVMObjectAllocEventCollector oam;
1923
1924 // Exclude primitive types and array types
1925 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1926 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1927 // Return empty array
1928 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1929 return (jobjectArray) JNIHandles::make_local(env, res);
1930 }
1931
1932 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1933
1934 // Ensure class is linked
1935 k->link_class(CHECK_NULL);
1936
1937 Array<Method*>* methods = k->methods();
1938 int methods_length = methods->length();
1939
1940 // Save original method_idnum in case of redefinition, which can change
1941 // the idnum of obsolete methods. The new method will have the same idnum
1942 // but if we refresh the methods array, the counts will be wrong.
1943 ResourceMark rm(THREAD);
1944 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1945 int num_methods = 0;
1946
1947 for (int i = 0; i < methods_length; i++) {
1948 methodHandle method(THREAD, methods->at(i));
1949 if (select_method(method, want_constructor)) {
1950 if (!publicOnly || method->is_public()) {
1951 idnums->push(method->method_idnum());
1952 ++num_methods;
1953 }
1954 }
1955 }
1956
1957 // Allocate result
1958 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1959 objArrayHandle result (THREAD, r);
1960
1961 // Now just put the methods that we selected above, but go by their idnum
1962 // in case of redefinition. The methods can be redefined at any safepoint,
1963 // so above when allocating the oop array and below when creating reflect
1964 // objects.
1965 for (int i = 0; i < num_methods; i++) {
1966 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1967 if (method.is_null()) {
1968 // Method may have been deleted and seems this API can handle null
1969 // Otherwise should probably put a method that throws NSME
1970 result->obj_at_put(i, NULL);
1971 } else {
1972 oop m;
1973 if (want_constructor) {
1974 m = Reflection::new_constructor(method, CHECK_NULL);
1975 } else {
1976 m = Reflection::new_method(method, false, CHECK_NULL);
1977 }
1978 result->obj_at_put(i, m);
1979 }
1980 }
1981
1982 return (jobjectArray) JNIHandles::make_local(env, result());
1983 }
1984
1985 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1986 {
1987 JVMWrapper("JVM_GetClassDeclaredMethods");
1988 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1989 /*want_constructor*/ false,
1990 SystemDictionary::reflect_Method_klass(), THREAD);
1991 }
1992 JVM_END
1993
1994 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1995 {
1996 JVMWrapper("JVM_GetClassDeclaredConstructors");
1997 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1998 /*want_constructor*/ true,
1999 SystemDictionary::reflect_Constructor_klass(), THREAD);
2000 }
2001 JVM_END
2002
2003 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2004 {
2005 JVMWrapper("JVM_GetClassAccessFlags");
2006 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2007 // Primitive type
2008 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2009 }
2010
2011 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2012 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2013 }
2014 JVM_END
2015
2016
2017 // Constant pool access //////////////////////////////////////////////////////////
2018
2019 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2020 {
2021 JVMWrapper("JVM_GetClassConstantPool");
2022 JvmtiVMObjectAllocEventCollector oam;
2023
2024 // Return null for primitives and arrays
2025 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2027 if (k->oop_is_instance()) {
2028 instanceKlassHandle k_h(THREAD, k);
2029 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2030 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2031 return JNIHandles::make_local(jcp());
2032 }
2033 }
2034 return NULL;
2035 }
2036 JVM_END
2037
2038
2039 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetSize");
2042 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2043 return cp->length();
2044 }
2045 JVM_END
2046
2047
2048 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2049 {
2050 JVMWrapper("JVM_ConstantPoolGetClassAt");
2051 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2052 bounds_check(cp, index, CHECK_NULL);
2053 constantTag tag = cp->tag_at(index);
2054 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2055 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2056 }
2057 Klass* k = cp->klass_at(index, CHECK_NULL);
2058 return (jclass) JNIHandles::make_local(k->java_mirror());
2059 }
2060 JVM_END
2061
2062 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2063 {
2064 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2065 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2066 bounds_check(cp, index, CHECK_NULL);
2067 constantTag tag = cp->tag_at(index);
2068 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2070 }
2071 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2072 if (k == NULL) return NULL;
2073 return (jclass) JNIHandles::make_local(k->java_mirror());
2074 }
2075 JVM_END
2076
2077 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2078 constantTag tag = cp->tag_at(index);
2079 if (!tag.is_method() && !tag.is_interface_method()) {
2080 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2081 }
2082 int klass_ref = cp->uncached_klass_ref_index_at(index);
2083 Klass* k_o;
2084 if (force_resolution) {
2085 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2086 } else {
2087 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2088 if (k_o == NULL) return NULL;
2089 }
2090 instanceKlassHandle k(THREAD, k_o);
2091 Symbol* name = cp->uncached_name_ref_at(index);
2092 Symbol* sig = cp->uncached_signature_ref_at(index);
2093 methodHandle m (THREAD, k->find_method(name, sig));
2094 if (m.is_null()) {
2095 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2096 }
2097 oop method;
2098 if (!m->is_initializer() || m->is_static()) {
2099 method = Reflection::new_method(m, true, CHECK_NULL);
2100 } else {
2101 method = Reflection::new_constructor(m, CHECK_NULL);
2102 }
2103 return JNIHandles::make_local(method);
2104 }
2105
2106 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2107 {
2108 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2109 JvmtiVMObjectAllocEventCollector oam;
2110 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2111 bounds_check(cp, index, CHECK_NULL);
2112 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2113 return res;
2114 }
2115 JVM_END
2116
2117 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2118 {
2119 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2120 JvmtiVMObjectAllocEventCollector oam;
2121 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2122 bounds_check(cp, index, CHECK_NULL);
2123 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2124 return res;
2125 }
2126 JVM_END
2127
2128 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2129 constantTag tag = cp->tag_at(index);
2130 if (!tag.is_field()) {
2131 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2132 }
2133 int klass_ref = cp->uncached_klass_ref_index_at(index);
2134 Klass* k_o;
2135 if (force_resolution) {
2136 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2137 } else {
2138 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2139 if (k_o == NULL) return NULL;
2140 }
2141 instanceKlassHandle k(THREAD, k_o);
2142 Symbol* name = cp->uncached_name_ref_at(index);
2143 Symbol* sig = cp->uncached_signature_ref_at(index);
2144 fieldDescriptor fd;
2145 Klass* target_klass = k->find_field(name, sig, &fd);
2146 if (target_klass == NULL) {
2147 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2148 }
2149 oop field = Reflection::new_field(&fd, CHECK_NULL);
2150 return JNIHandles::make_local(field);
2151 }
2152
2153 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2154 {
2155 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2156 JvmtiVMObjectAllocEventCollector oam;
2157 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2158 bounds_check(cp, index, CHECK_NULL);
2159 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2160 return res;
2161 }
2162 JVM_END
2163
2164 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2165 {
2166 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2167 JvmtiVMObjectAllocEventCollector oam;
2168 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2169 bounds_check(cp, index, CHECK_NULL);
2170 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2171 return res;
2172 }
2173 JVM_END
2174
2175 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2178 JvmtiVMObjectAllocEventCollector oam;
2179 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_NULL);
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_field_or_method()) {
2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 int klass_ref = cp->uncached_klass_ref_index_at(index);
2186 Symbol* klass_name = cp->klass_name_at(klass_ref);
2187 Symbol* member_name = cp->uncached_name_ref_at(index);
2188 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2189 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2190 objArrayHandle dest(THREAD, dest_o);
2191 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2192 dest->obj_at_put(0, str());
2193 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2194 dest->obj_at_put(1, str());
2195 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2196 dest->obj_at_put(2, str());
2197 return (jobjectArray) JNIHandles::make_local(dest());
2198 }
2199 JVM_END
2200
2201 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2202 {
2203 JVMWrapper("JVM_ConstantPoolGetIntAt");
2204 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_0);
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_int()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 return cp->int_at(index);
2211 }
2212 JVM_END
2213
2214 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2215 {
2216 JVMWrapper("JVM_ConstantPoolGetLongAt");
2217 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2218 bounds_check(cp, index, CHECK_(0L));
2219 constantTag tag = cp->tag_at(index);
2220 if (!tag.is_long()) {
2221 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2222 }
2223 return cp->long_at(index);
2224 }
2225 JVM_END
2226
2227 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2228 {
2229 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2230 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2231 bounds_check(cp, index, CHECK_(0.0f));
2232 constantTag tag = cp->tag_at(index);
2233 if (!tag.is_float()) {
2234 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2235 }
2236 return cp->float_at(index);
2237 }
2238 JVM_END
2239
2240 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2241 {
2242 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2243 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2244 bounds_check(cp, index, CHECK_(0.0));
2245 constantTag tag = cp->tag_at(index);
2246 if (!tag.is_double()) {
2247 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2248 }
2249 return cp->double_at(index);
2250 }
2251 JVM_END
2252
2253 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2254 {
2255 JVMWrapper("JVM_ConstantPoolGetStringAt");
2256 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2257 bounds_check(cp, index, CHECK_NULL);
2258 constantTag tag = cp->tag_at(index);
2259 if (!tag.is_string()) {
2260 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2261 }
2262 oop str = cp->string_at(index, CHECK_NULL);
2263 return (jstring) JNIHandles::make_local(str);
2264 }
2265 JVM_END
2266
2267 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2268 {
2269 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2270 JvmtiVMObjectAllocEventCollector oam;
2271 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2272 bounds_check(cp, index, CHECK_NULL);
2273 constantTag tag = cp->tag_at(index);
2274 if (!tag.is_symbol()) {
2275 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2276 }
2277 Symbol* sym = cp->symbol_at(index);
2278 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2279 return (jstring) JNIHandles::make_local(str());
2280 }
2281 JVM_END
2282
2283
2284 // Assertion support. //////////////////////////////////////////////////////////
2285
2286 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2287 JVMWrapper("JVM_DesiredAssertionStatus");
2288 assert(cls != NULL, "bad class");
2289
2290 oop r = JNIHandles::resolve(cls);
2291 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2292 if (java_lang_Class::is_primitive(r)) return false;
2293
2294 Klass* k = java_lang_Class::as_Klass(r);
2295 assert(k->oop_is_instance(), "must be an instance klass");
2296 if (! k->oop_is_instance()) return false;
2297
2298 ResourceMark rm(THREAD);
2299 const char* name = k->name()->as_C_string();
2300 bool system_class = k->class_loader() == NULL;
2301 return JavaAssertions::enabled(name, system_class);
2302
2303 JVM_END
2304
2305
2306 // Return a new AssertionStatusDirectives object with the fields filled in with
2307 // command-line assertion arguments (i.e., -ea, -da).
2308 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2309 JVMWrapper("JVM_AssertionStatusDirectives");
2310 JvmtiVMObjectAllocEventCollector oam;
2311 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2312 return JNIHandles::make_local(env, asd);
2313 JVM_END
2314
2315 // Verification ////////////////////////////////////////////////////////////////////////////////
2316
2317 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2318
2319 // RedefineClasses support: bug 6214132 caused verification to fail.
2320 // All functions from this section should call the jvmtiThreadSate function:
2321 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2322 // The function returns a Klass* of the _scratch_class if the verifier
2323 // was invoked in the middle of the class redefinition.
2324 // Otherwise it returns its argument value which is the _the_class Klass*.
2325 // Please, refer to the description in the jvmtiThreadSate.hpp.
2326
2327 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2328 JVMWrapper("JVM_GetClassNameUTF");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 return k->name()->as_utf8();
2332 JVM_END
2333
2334
2335 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2336 JVMWrapper("JVM_GetClassCPTypes");
2337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 // types will have length zero if this is not an InstanceKlass
2340 // (length is determined by call to JVM_GetClassCPEntriesCount)
2341 if (k->oop_is_instance()) {
2342 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2343 for (int index = cp->length() - 1; index >= 0; index--) {
2344 constantTag tag = cp->tag_at(index);
2345 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2346 }
2347 }
2348 JVM_END
2349
2350
2351 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2352 JVMWrapper("JVM_GetClassCPEntriesCount");
2353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2354 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2355 if (!k->oop_is_instance())
2356 return 0;
2357 return InstanceKlass::cast(k)->constants()->length();
2358 JVM_END
2359
2360
2361 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2362 JVMWrapper("JVM_GetClassFieldsCount");
2363 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2364 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365 if (!k->oop_is_instance())
2366 return 0;
2367 return InstanceKlass::cast(k)->java_fields_count();
2368 JVM_END
2369
2370
2371 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2372 JVMWrapper("JVM_GetClassMethodsCount");
2373 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2374 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2375 if (!k->oop_is_instance())
2376 return 0;
2377 return InstanceKlass::cast(k)->methods()->length();
2378 JVM_END
2379
2380
2381 // The following methods, used for the verifier, are never called with
2382 // array klasses, so a direct cast to InstanceKlass is safe.
2383 // Typically, these methods are called in a loop with bounds determined
2384 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2385 // zero for arrays.
2386 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2387 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2389 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2390 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2391 int length = method->checked_exceptions_length();
2392 if (length > 0) {
2393 CheckedExceptionElement* table= method->checked_exceptions_start();
2394 for (int i = 0; i < length; i++) {
2395 exceptions[i] = table[i].class_cp_index;
2396 }
2397 }
2398 JVM_END
2399
2400
2401 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2402 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2403 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2406 return method->checked_exceptions_length();
2407 JVM_END
2408
2409
2410 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2411 JVMWrapper("JVM_GetMethodIxByteCode");
2412 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2413 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2414 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2415 memcpy(code, method->code_base(), method->code_size());
2416 JVM_END
2417
2418
2419 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2420 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2422 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2423 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2424 return method->code_size();
2425 JVM_END
2426
2427
2428 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2429 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2433 ExceptionTable extable(method);
2434 entry->start_pc = extable.start_pc(entry_index);
2435 entry->end_pc = extable.end_pc(entry_index);
2436 entry->handler_pc = extable.handler_pc(entry_index);
2437 entry->catchType = extable.catch_type_index(entry_index);
2438 JVM_END
2439
2440
2441 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2442 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2443 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2444 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2445 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2446 return method->exception_table_length();
2447 JVM_END
2448
2449
2450 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2451 JVMWrapper("JVM_GetMethodIxModifiers");
2452 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2453 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2454 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2455 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2456 JVM_END
2457
2458
2459 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2460 JVMWrapper("JVM_GetFieldIxModifiers");
2461 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2462 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2463 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2464 JVM_END
2465
2466
2467 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2468 JVMWrapper("JVM_GetMethodIxLocalsCount");
2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2471 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2472 return method->max_locals();
2473 JVM_END
2474
2475
2476 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2477 JVMWrapper("JVM_GetMethodIxArgsSize");
2478 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2480 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2481 return method->size_of_parameters();
2482 JVM_END
2483
2484
2485 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2486 JVMWrapper("JVM_GetMethodIxMaxStack");
2487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2488 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2489 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2490 return method->verifier_max_stack();
2491 JVM_END
2492
2493
2494 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2495 JVMWrapper("JVM_IsConstructorIx");
2496 ResourceMark rm(THREAD);
2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2500 return method->name() == vmSymbols::object_initializer_name();
2501 JVM_END
2502
2503
2504 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2505 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2506 ResourceMark rm(THREAD);
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->is_overpass();
2511 JVM_END
2512
2513 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2514 JVMWrapper("JVM_GetMethodIxIxUTF");
2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2517 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2518 return method->name()->as_utf8();
2519 JVM_END
2520
2521
2522 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2523 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2527 return method->signature()->as_utf8();
2528 JVM_END
2529
2530 /**
2531 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2532 * read entries in the constant pool. Since the old verifier always
2533 * works on a copy of the code, it will not see any rewriting that
2534 * may possibly occur in the middle of verification. So it is important
2535 * that nothing it calls tries to use the cpCache instead of the raw
2536 * constant pool, so we must use cp->uncached_x methods when appropriate.
2537 */
2538 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2539 JVMWrapper("JVM_GetCPFieldNameUTF");
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2543 switch (cp->tag_at(cp_index).value()) {
2544 case JVM_CONSTANT_Fieldref:
2545 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2546 default:
2547 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2548 }
2549 ShouldNotReachHere();
2550 return NULL;
2551 JVM_END
2552
2553
2554 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2555 JVMWrapper("JVM_GetCPMethodNameUTF");
2556 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2557 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2558 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2559 switch (cp->tag_at(cp_index).value()) {
2560 case JVM_CONSTANT_InterfaceMethodref:
2561 case JVM_CONSTANT_Methodref:
2562 case JVM_CONSTANT_NameAndType: // for invokedynamic
2563 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2564 default:
2565 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2566 }
2567 ShouldNotReachHere();
2568 return NULL;
2569 JVM_END
2570
2571
2572 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2573 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2577 switch (cp->tag_at(cp_index).value()) {
2578 case JVM_CONSTANT_InterfaceMethodref:
2579 case JVM_CONSTANT_Methodref:
2580 case JVM_CONSTANT_NameAndType: // for invokedynamic
2581 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2582 default:
2583 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2584 }
2585 ShouldNotReachHere();
2586 return NULL;
2587 JVM_END
2588
2589
2590 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2591 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2593 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2594 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2595 switch (cp->tag_at(cp_index).value()) {
2596 case JVM_CONSTANT_Fieldref:
2597 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2598 default:
2599 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2600 }
2601 ShouldNotReachHere();
2602 return NULL;
2603 JVM_END
2604
2605
2606 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2607 JVMWrapper("JVM_GetCPClassNameUTF");
2608 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2609 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2610 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2611 Symbol* classname = cp->klass_name_at(cp_index);
2612 return classname->as_utf8();
2613 JVM_END
2614
2615
2616 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2617 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2621 switch (cp->tag_at(cp_index).value()) {
2622 case JVM_CONSTANT_Fieldref: {
2623 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2624 Symbol* classname = cp->klass_name_at(class_index);
2625 return classname->as_utf8();
2626 }
2627 default:
2628 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2629 }
2630 ShouldNotReachHere();
2631 return NULL;
2632 JVM_END
2633
2634
2635 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2636 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2637 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2638 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2639 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2640 switch (cp->tag_at(cp_index).value()) {
2641 case JVM_CONSTANT_Methodref:
2642 case JVM_CONSTANT_InterfaceMethodref: {
2643 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2644 Symbol* classname = cp->klass_name_at(class_index);
2645 return classname->as_utf8();
2646 }
2647 default:
2648 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2649 }
2650 ShouldNotReachHere();
2651 return NULL;
2652 JVM_END
2653
2654
2655 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2656 JVMWrapper("JVM_GetCPFieldModifiers");
2657 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2658 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2659 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2660 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2661 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2662 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2663 switch (cp->tag_at(cp_index).value()) {
2664 case JVM_CONSTANT_Fieldref: {
2665 Symbol* name = cp->uncached_name_ref_at(cp_index);
2666 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2667 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2668 if (fs.name() == name && fs.signature() == signature) {
2669 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2670 }
2671 }
2672 return -1;
2673 }
2674 default:
2675 fatal("JVM_GetCPFieldModifiers: illegal constant");
2676 }
2677 ShouldNotReachHere();
2678 return 0;
2679 JVM_END
2680
2681
2682 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2683 JVMWrapper("JVM_GetCPMethodModifiers");
2684 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2685 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2686 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2687 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2688 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2689 switch (cp->tag_at(cp_index).value()) {
2690 case JVM_CONSTANT_Methodref:
2691 case JVM_CONSTANT_InterfaceMethodref: {
2692 Symbol* name = cp->uncached_name_ref_at(cp_index);
2693 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2694 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2695 int methods_count = methods->length();
2696 for (int i = 0; i < methods_count; i++) {
2697 Method* method = methods->at(i);
2698 if (method->name() == name && method->signature() == signature) {
2699 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2700 }
2701 }
2702 return -1;
2703 }
2704 default:
2705 fatal("JVM_GetCPMethodModifiers: illegal constant");
2706 }
2707 ShouldNotReachHere();
2708 return 0;
2709 JVM_END
2710
2711
2712 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2713
2714 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2715 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2716 JVM_END
2717
2718
2719 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2720 JVMWrapper("JVM_IsSameClassPackage");
2721 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2722 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2723 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2724 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2725 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2726 JVM_END
2727
2728
2729 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2730
2731 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2732 JVMWrapper2("JVM_Open (%s)", fname);
2733
2734 //%note jvm_r6
2735 int result = os::open(fname, flags, mode);
2736 if (result >= 0) {
2737 return result;
2738 } else {
2739 switch(errno) {
2740 case EEXIST:
2741 return JVM_EEXIST;
2742 default:
2743 return -1;
2744 }
2745 }
2746 JVM_END
2747
2748
2749 JVM_LEAF(jint, JVM_Close(jint fd))
2750 JVMWrapper2("JVM_Close (0x%x)", fd);
2751 //%note jvm_r6
2752 return os::close(fd);
2753 JVM_END
2754
2755
2756 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2757 JVMWrapper2("JVM_Read (0x%x)", fd);
2758
2759 //%note jvm_r6
2760 return (jint)os::restartable_read(fd, buf, nbytes);
2761 JVM_END
2762
2763
2764 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2765 JVMWrapper2("JVM_Write (0x%x)", fd);
2766
2767 //%note jvm_r6
2768 return (jint)os::write(fd, buf, nbytes);
2769 JVM_END
2770
2771
2772 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2773 JVMWrapper2("JVM_Available (0x%x)", fd);
2774 //%note jvm_r6
2775 return os::available(fd, pbytes);
2776 JVM_END
2777
2778
2779 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2780 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2781 //%note jvm_r6
2782 return os::lseek(fd, offset, whence);
2783 JVM_END
2784
2785
2786 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2787 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2788 return os::ftruncate(fd, length);
2789 JVM_END
2790
2791
2792 JVM_LEAF(jint, JVM_Sync(jint fd))
2793 JVMWrapper2("JVM_Sync (0x%x)", fd);
2794 //%note jvm_r6
2795 return os::fsync(fd);
2796 JVM_END
2797
2798
2799 // Printing support //////////////////////////////////////////////////
2800 extern "C" {
2801
2802 ATTRIBUTE_PRINTF(3, 0)
2803 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2804 // see bug 4399518, 4417214
2805 if ((intptr_t)count <= 0) return -1;
2806 return vsnprintf(str, count, fmt, args);
2807 }
2808
2809 ATTRIBUTE_PRINTF(3, 0)
2810 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2811 va_list args;
2812 int len;
2813 va_start(args, fmt);
2814 len = jio_vsnprintf(str, count, fmt, args);
2815 va_end(args);
2816 return len;
2817 }
2818
2819 ATTRIBUTE_PRINTF(2,3)
2820 int jio_fprintf(FILE* f, const char *fmt, ...) {
2821 int len;
2822 va_list args;
2823 va_start(args, fmt);
2824 len = jio_vfprintf(f, fmt, args);
2825 va_end(args);
2826 return len;
2827 }
2828
2829 ATTRIBUTE_PRINTF(2, 0)
2830 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2831 if (Arguments::vfprintf_hook() != NULL) {
2832 return Arguments::vfprintf_hook()(f, fmt, args);
2833 } else {
2834 return vfprintf(f, fmt, args);
2835 }
2836 }
2837
2838 ATTRIBUTE_PRINTF(1, 2)
2839 JNIEXPORT int jio_printf(const char *fmt, ...) {
2840 int len;
2841 va_list args;
2842 va_start(args, fmt);
2843 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2844 va_end(args);
2845 return len;
2846 }
2847
2848
2849 // HotSpot specific jio method
2850 void jio_print(const char* s) {
2851 // Try to make this function as atomic as possible.
2852 if (Arguments::vfprintf_hook() != NULL) {
2853 jio_fprintf(defaultStream::output_stream(), "%s", s);
2854 } else {
2855 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2856 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2857 }
2858 }
2859
2860 } // Extern C
2861
2862 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2863
2864 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2865 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2866 // OSThread objects. The exception to this rule is when the target object is the thread
2867 // doing the operation, in which case we know that the thread won't exit until the
2868 // operation is done (all exits being voluntary). There are a few cases where it is
2869 // rather silly to do operations on yourself, like resuming yourself or asking whether
2870 // you are alive. While these can still happen, they are not subject to deadlocks if
2871 // the lock is held while the operation occurs (this is not the case for suspend, for
2872 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2873 // implementation is local to this file, we always lock Threads_lock for that one.
2874
2875 static void thread_entry(JavaThread* thread, TRAPS) {
2876 HandleMark hm(THREAD);
2877 Handle obj(THREAD, thread->threadObj());
2878 JavaValue result(T_VOID);
2879 JavaCalls::call_virtual(&result,
2880 obj,
2881 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2882 vmSymbols::run_method_name(),
2883 vmSymbols::void_method_signature(),
2884 THREAD);
2885 }
2886
2887
2888 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2889 JVMWrapper("JVM_StartThread");
2890 JavaThread *native_thread = NULL;
2891
2892 // We cannot hold the Threads_lock when we throw an exception,
2893 // due to rank ordering issues. Example: we might need to grab the
2894 // Heap_lock while we construct the exception.
2895 bool throw_illegal_thread_state = false;
2896
2897 // We must release the Threads_lock before we can post a jvmti event
2898 // in Thread::start.
2899 {
2900 // Ensure that the C++ Thread and OSThread structures aren't freed before
2901 // we operate.
2902 MutexLocker mu(Threads_lock);
2903
2904 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2905 // re-starting an already started thread, so we should usually find
2906 // that the JavaThread is null. However for a JNI attached thread
2907 // there is a small window between the Thread object being created
2908 // (with its JavaThread set) and the update to its threadStatus, so we
2909 // have to check for this
2910 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2911 throw_illegal_thread_state = true;
2912 } else {
2913 // We could also check the stillborn flag to see if this thread was already stopped, but
2914 // for historical reasons we let the thread detect that itself when it starts running
2915
2916 jlong size =
2917 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2918 // Allocate the C++ Thread structure and create the native thread. The
2919 // stack size retrieved from java is signed, but the constructor takes
2920 // size_t (an unsigned type), so avoid passing negative values which would
2921 // result in really large stacks.
2922 size_t sz = size > 0 ? (size_t) size : 0;
2923 native_thread = new JavaThread(&thread_entry, sz);
2924
2925 // At this point it may be possible that no osthread was created for the
2926 // JavaThread due to lack of memory. Check for this situation and throw
2927 // an exception if necessary. Eventually we may want to change this so
2928 // that we only grab the lock if the thread was created successfully -
2929 // then we can also do this check and throw the exception in the
2930 // JavaThread constructor.
2931 if (native_thread->osthread() != NULL) {
2932 // Note: the current thread is not being used within "prepare".
2933 native_thread->prepare(jthread);
2934 }
2935 }
2936 }
2937
2938 if (throw_illegal_thread_state) {
2939 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2940 }
2941
2942 assert(native_thread != NULL, "Starting null thread?");
2943
2944 if (native_thread->osthread() == NULL) {
2945 // No one should hold a reference to the 'native_thread'.
2946 delete native_thread;
2947 if (JvmtiExport::should_post_resource_exhausted()) {
2948 JvmtiExport::post_resource_exhausted(
2949 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2950 os::native_thread_creation_failed_msg());
2951 }
2952 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2953 os::native_thread_creation_failed_msg());
2954 }
2955
2956 Thread::start(native_thread);
2957
2958 JVM_END
2959
2960 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2961 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2962 // but is thought to be reliable and simple. In the case, where the receiver is the
2963 // same thread as the sender, no safepoint is needed.
2964 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2965 JVMWrapper("JVM_StopThread");
2966
2967 oop java_throwable = JNIHandles::resolve(throwable);
2968 if (java_throwable == NULL) {
2969 THROW(vmSymbols::java_lang_NullPointerException());
2970 }
2971 oop java_thread = JNIHandles::resolve_non_null(jthread);
2972 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2973 Events::log_exception(JavaThread::current(),
2974 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2975 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2976 // First check if thread is alive
2977 if (receiver != NULL) {
2978 // Check if exception is getting thrown at self (use oop equality, since the
2979 // target object might exit)
2980 if (java_thread == thread->threadObj()) {
2981 THROW_OOP(java_throwable);
2982 } else {
2983 // Enques a VM_Operation to stop all threads and then deliver the exception...
2984 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2985 }
2986 }
2987 else {
2988 // Either:
2989 // - target thread has not been started before being stopped, or
2990 // - target thread already terminated
2991 // We could read the threadStatus to determine which case it is
2992 // but that is overkill as it doesn't matter. We must set the
2993 // stillborn flag for the first case, and if the thread has already
2994 // exited setting this flag has no affect
2995 java_lang_Thread::set_stillborn(java_thread);
2996 }
2997 JVM_END
2998
2999
3000 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3001 JVMWrapper("JVM_IsThreadAlive");
3002
3003 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3004 return java_lang_Thread::is_alive(thread_oop);
3005 JVM_END
3006
3007
3008 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3009 JVMWrapper("JVM_SuspendThread");
3010 oop java_thread = JNIHandles::resolve_non_null(jthread);
3011 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3012
3013 if (receiver != NULL) {
3014 // thread has run and has not exited (still on threads list)
3015
3016 {
3017 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3018 if (receiver->is_external_suspend()) {
3019 // Don't allow nested external suspend requests. We can't return
3020 // an error from this interface so just ignore the problem.
3021 return;
3022 }
3023 if (receiver->is_exiting()) { // thread is in the process of exiting
3024 return;
3025 }
3026 receiver->set_external_suspend();
3027 }
3028
3029 // java_suspend() will catch threads in the process of exiting
3030 // and will ignore them.
3031 receiver->java_suspend();
3032
3033 // It would be nice to have the following assertion in all the
3034 // time, but it is possible for a racing resume request to have
3035 // resumed this thread right after we suspended it. Temporarily
3036 // enable this assertion if you are chasing a different kind of
3037 // bug.
3038 //
3039 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3040 // receiver->is_being_ext_suspended(), "thread is not suspended");
3041 }
3042 JVM_END
3043
3044
3045 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3046 JVMWrapper("JVM_ResumeThread");
3047 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3048 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3049 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3050 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3051 // looks at it.
3052 MutexLocker ml(Threads_lock);
3053 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3054 if (thr != NULL) {
3055 // the thread has run and is not in the process of exiting
3056 thr->java_resume();
3057 }
3058 JVM_END
3059
3060
3061 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3062 JVMWrapper("JVM_SetThreadPriority");
3063 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3064 MutexLocker ml(Threads_lock);
3065 oop java_thread = JNIHandles::resolve_non_null(jthread);
3066 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3067 JavaThread* thr = java_lang_Thread::thread(java_thread);
3068 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3069 Thread::set_priority(thr, (ThreadPriority)prio);
3070 }
3071 JVM_END
3072
3073
3074 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3075 JVMWrapper("JVM_Yield");
3076 if (os::dont_yield()) return;
3077 HOTSPOT_THREAD_YIELD();
3078
3079 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3080 // Critical for similar threading behaviour
3081 if (ConvertYieldToSleep) {
3082 os::sleep(thread, MinSleepInterval, false);
3083 } else {
3084 os::naked_yield();
3085 }
3086 JVM_END
3087
3088
3089 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3090 JVMWrapper("JVM_Sleep");
3091
3092 if (millis < 0) {
3093 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3094 }
3095
3096 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3097 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3098 }
3099
3100 // Save current thread state and restore it at the end of this block.
3101 // And set new thread state to SLEEPING.
3102 JavaThreadSleepState jtss(thread);
3103
3104 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3105
3106 EventThreadSleep event;
3107
3108 if (millis == 0) {
3109 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3110 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3111 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3112 // for SOLARIS
3113 if (ConvertSleepToYield) {
3114 os::naked_yield();
3115 } else {
3116 ThreadState old_state = thread->osthread()->get_state();
3117 thread->osthread()->set_state(SLEEPING);
3118 os::sleep(thread, MinSleepInterval, false);
3119 thread->osthread()->set_state(old_state);
3120 }
3121 } else {
3122 ThreadState old_state = thread->osthread()->get_state();
3123 thread->osthread()->set_state(SLEEPING);
3124 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3125 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3126 // us while we were sleeping. We do not overwrite those.
3127 if (!HAS_PENDING_EXCEPTION) {
3128 if (event.should_commit()) {
3129 event.set_time(millis);
3130 event.commit();
3131 }
3132 HOTSPOT_THREAD_SLEEP_END(1);
3133
3134 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3135 // to properly restore the thread state. That's likely wrong.
3136 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3137 }
3138 }
3139 thread->osthread()->set_state(old_state);
3140 }
3141 if (event.should_commit()) {
3142 event.set_time(millis);
3143 event.commit();
3144 }
3145 HOTSPOT_THREAD_SLEEP_END(0);
3146 JVM_END
3147
3148 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3149 JVMWrapper("JVM_CurrentThread");
3150 oop jthread = thread->threadObj();
3151 assert (thread != NULL, "no current thread!");
3152 return JNIHandles::make_local(env, jthread);
3153 JVM_END
3154
3155
3156 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3157 JVMWrapper("JVM_CountStackFrames");
3158
3159 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3160 oop java_thread = JNIHandles::resolve_non_null(jthread);
3161 bool throw_illegal_thread_state = false;
3162 int count = 0;
3163
3164 {
3165 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3166 // We need to re-resolve the java_thread, since a GC might have happened during the
3167 // acquire of the lock
3168 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3169
3170 if (thr == NULL) {
3171 // do nothing
3172 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3173 // Check whether this java thread has been suspended already. If not, throws
3174 // IllegalThreadStateException. We defer to throw that exception until
3175 // Threads_lock is released since loading exception class has to leave VM.
3176 // The correct way to test a thread is actually suspended is
3177 // wait_for_ext_suspend_completion(), but we can't call that while holding
3178 // the Threads_lock. The above tests are sufficient for our purposes
3179 // provided the walkability of the stack is stable - which it isn't
3180 // 100% but close enough for most practical purposes.
3181 throw_illegal_thread_state = true;
3182 } else {
3183 // Count all java activation, i.e., number of vframes
3184 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3185 // Native frames are not counted
3186 if (!vfst.method()->is_native()) count++;
3187 }
3188 }
3189 }
3190
3191 if (throw_illegal_thread_state) {
3192 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3193 "this thread is not suspended");
3194 }
3195 return count;
3196 JVM_END
3197
3198 // Consider: A better way to implement JVM_Interrupt() is to acquire
3199 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3200 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3201 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3202 // outside the critical section. Threads_lock is hot so we want to minimize
3203 // the hold-time. A cleaner interface would be to decompose interrupt into
3204 // two steps. The 1st phase, performed under Threads_lock, would return
3205 // a closure that'd be invoked after Threads_lock was dropped.
3206 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3207 // admit spurious wakeups.
3208
3209 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3210 JVMWrapper("JVM_Interrupt");
3211
3212 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3213 oop java_thread = JNIHandles::resolve_non_null(jthread);
3214 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3215 // We need to re-resolve the java_thread, since a GC might have happened during the
3216 // acquire of the lock
3217 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3218 if (thr != NULL) {
3219 Thread::interrupt(thr);
3220 }
3221 JVM_END
3222
3223
3224 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3225 JVMWrapper("JVM_IsInterrupted");
3226
3227 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3228 oop java_thread = JNIHandles::resolve_non_null(jthread);
3229 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3230 // We need to re-resolve the java_thread, since a GC might have happened during the
3231 // acquire of the lock
3232 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3233 if (thr == NULL) {
3234 return JNI_FALSE;
3235 } else {
3236 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3237 }
3238 JVM_END
3239
3240
3241 // Return true iff the current thread has locked the object passed in
3242
3243 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3244 JVMWrapper("JVM_HoldsLock");
3245 assert(THREAD->is_Java_thread(), "sanity check");
3246 if (obj == NULL) {
3247 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3248 }
3249 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3250 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3251 JVM_END
3252
3253
3254 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3255 JVMWrapper("JVM_DumpAllStacks");
3256 VM_PrintThreads op;
3257 VMThread::execute(&op);
3258 if (JvmtiExport::should_post_data_dump()) {
3259 JvmtiExport::post_data_dump();
3260 }
3261 JVM_END
3262
3263 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3264 JVMWrapper("JVM_SetNativeThreadName");
3265 ResourceMark rm(THREAD);
3266 oop java_thread = JNIHandles::resolve_non_null(jthread);
3267 JavaThread* thr = java_lang_Thread::thread(java_thread);
3268 // Thread naming only supported for the current thread, doesn't work for
3269 // target threads.
3270 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3271 // we don't set the name of an attached thread to avoid stepping
3272 // on other programs
3273 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3274 os::set_native_thread_name(thread_name);
3275 }
3276 JVM_END
3277
3278 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3279
3280 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3281 assert(jthread->is_Java_thread(), "must be a Java thread");
3282 if (jthread->privileged_stack_top() == NULL) return false;
3283 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3284 oop loader = jthread->privileged_stack_top()->class_loader();
3285 if (loader == NULL) return true;
3286 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3287 if (trusted) return true;
3288 }
3289 return false;
3290 }
3291
3292 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3293 JVMWrapper("JVM_CurrentLoadedClass");
3294 ResourceMark rm(THREAD);
3295
3296 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3297 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3298 bool trusted = is_trusted_frame(thread, &vfst);
3299 if (trusted) return NULL;
3300
3301 Method* m = vfst.method();
3302 if (!m->is_native()) {
3303 InstanceKlass* holder = m->method_holder();
3304 oop loader = holder->class_loader();
3305 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3306 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3307 }
3308 }
3309 }
3310 return NULL;
3311 JVM_END
3312
3313
3314 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3315 JVMWrapper("JVM_CurrentClassLoader");
3316 ResourceMark rm(THREAD);
3317
3318 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3319
3320 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3321 bool trusted = is_trusted_frame(thread, &vfst);
3322 if (trusted) return NULL;
3323
3324 Method* m = vfst.method();
3325 if (!m->is_native()) {
3326 InstanceKlass* holder = m->method_holder();
3327 assert(holder->is_klass(), "just checking");
3328 oop loader = holder->class_loader();
3329 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3330 return JNIHandles::make_local(env, loader);
3331 }
3332 }
3333 }
3334 return NULL;
3335 JVM_END
3336
3337
3338 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3339 JVMWrapper("JVM_GetClassContext");
3340 ResourceMark rm(THREAD);
3341 JvmtiVMObjectAllocEventCollector oam;
3342 vframeStream vfst(thread);
3343
3344 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3345 // This must only be called from SecurityManager.getClassContext
3346 Method* m = vfst.method();
3347 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3348 m->name() == vmSymbols::getClassContext_name() &&
3349 m->signature() == vmSymbols::void_class_array_signature())) {
3350 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3351 }
3352 }
3353
3354 // Collect method holders
3355 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3356 for (; !vfst.at_end(); vfst.security_next()) {
3357 Method* m = vfst.method();
3358 // Native frames are not returned
3359 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3360 Klass* holder = m->method_holder();
3361 assert(holder->is_klass(), "just checking");
3362 klass_array->append(holder);
3363 }
3364 }
3365
3366 // Create result array of type [Ljava/lang/Class;
3367 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3368 // Fill in mirrors corresponding to method holders
3369 for (int i = 0; i < klass_array->length(); i++) {
3370 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3371 }
3372
3373 return (jobjectArray) JNIHandles::make_local(env, result);
3374 JVM_END
3375
3376
3377 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3378 JVMWrapper("JVM_ClassDepth");
3379 ResourceMark rm(THREAD);
3380 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3381 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3382
3383 const char* str = java_lang_String::as_utf8_string(class_name_str());
3384 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3385 if (class_name_sym == NULL) {
3386 return -1;
3387 }
3388
3389 int depth = 0;
3390
3391 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3392 if (!vfst.method()->is_native()) {
3393 InstanceKlass* holder = vfst.method()->method_holder();
3394 assert(holder->is_klass(), "just checking");
3395 if (holder->name() == class_name_sym) {
3396 return depth;
3397 }
3398 depth++;
3399 }
3400 }
3401 return -1;
3402 JVM_END
3403
3404
3405 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3406 JVMWrapper("JVM_ClassLoaderDepth");
3407 ResourceMark rm(THREAD);
3408 int depth = 0;
3409 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3410 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3411 bool trusted = is_trusted_frame(thread, &vfst);
3412 if (trusted) return -1;
3413
3414 Method* m = vfst.method();
3415 if (!m->is_native()) {
3416 InstanceKlass* holder = m->method_holder();
3417 assert(holder->is_klass(), "just checking");
3418 oop loader = holder->class_loader();
3419 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3420 return depth;
3421 }
3422 depth++;
3423 }
3424 }
3425 return -1;
3426 JVM_END
3427
3428
3429 // java.lang.Package ////////////////////////////////////////////////////////////////
3430
3431
3432 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3433 JVMWrapper("JVM_GetSystemPackage");
3434 ResourceMark rm(THREAD);
3435 JvmtiVMObjectAllocEventCollector oam;
3436 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3437 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3438 return (jstring) JNIHandles::make_local(result);
3439 JVM_END
3440
3441
3442 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3443 JVMWrapper("JVM_GetSystemPackages");
3444 JvmtiVMObjectAllocEventCollector oam;
3445 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3446 return (jobjectArray) JNIHandles::make_local(result);
3447 JVM_END
3448
3449
3450 // ObjectInputStream ///////////////////////////////////////////////////////////////
3451
3452 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3453 if (current_class == NULL) {
3454 return true;
3455 }
3456 if ((current_class == field_class) || access.is_public()) {
3457 return true;
3458 }
3459
3460 if (access.is_protected()) {
3461 // See if current_class is a subclass of field_class
3462 if (current_class->is_subclass_of(field_class)) {
3463 return true;
3464 }
3465 }
3466
3467 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3468 }
3469
3470
3471 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3472 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3473 JVMWrapper("JVM_AllocateNewObject");
3474 JvmtiVMObjectAllocEventCollector oam;
3475 // Receiver is not used
3476 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3477 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3478
3479 // Cannot instantiate primitive types
3480 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3481 ResourceMark rm(THREAD);
3482 THROW_0(vmSymbols::java_lang_InvalidClassException());
3483 }
3484
3485 // Arrays not allowed here, must use JVM_AllocateNewArray
3486 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3487 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3488 ResourceMark rm(THREAD);
3489 THROW_0(vmSymbols::java_lang_InvalidClassException());
3490 }
3491
3492 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3493 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3494
3495 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3496
3497 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3498 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3499
3500 // Make sure klass is initialized, since we are about to instantiate one of them.
3501 curr_klass->initialize(CHECK_NULL);
3502
3503 methodHandle m (THREAD,
3504 init_klass->find_method(vmSymbols::object_initializer_name(),
3505 vmSymbols::void_method_signature()));
3506 if (m.is_null()) {
3507 ResourceMark rm(THREAD);
3508 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3509 Method::name_and_sig_as_C_string(init_klass(),
3510 vmSymbols::object_initializer_name(),
3511 vmSymbols::void_method_signature()));
3512 }
3513
3514 if (curr_klass == init_klass && !m->is_public()) {
3515 // Calling the constructor for class 'curr_klass'.
3516 // Only allow calls to a public no-arg constructor.
3517 // This path corresponds to creating an Externalizable object.
3518 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3519 }
3520
3521 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3522 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3523 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3524 }
3525
3526 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3527 // Call constructor m. This might call a constructor higher up in the hierachy
3528 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3529
3530 return JNIHandles::make_local(obj());
3531 JVM_END
3532
3533
3534 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3535 JVMWrapper("JVM_AllocateNewArray");
3536 JvmtiVMObjectAllocEventCollector oam;
3537 oop mirror = JNIHandles::resolve_non_null(currClass);
3538
3539 if (java_lang_Class::is_primitive(mirror)) {
3540 THROW_0(vmSymbols::java_lang_InvalidClassException());
3541 }
3542 Klass* k = java_lang_Class::as_Klass(mirror);
3543 oop result;
3544
3545 if (k->oop_is_typeArray()) {
3546 // typeArray
3547 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3548 } else if (k->oop_is_objArray()) {
3549 // objArray
3550 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3551 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3552 result = oak->allocate(length, CHECK_NULL);
3553 } else {
3554 THROW_0(vmSymbols::java_lang_InvalidClassException());
3555 }
3556 return JNIHandles::make_local(env, result);
3557 JVM_END
3558
3559
3560 // Return the first non-null class loader up the execution stack, or null
3561 // if only code from the null class loader is on the stack.
3562
3563 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3564 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3565 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3566 oop loader = vfst.method()->method_holder()->class_loader();
3567 if (loader != NULL) {
3568 return JNIHandles::make_local(env, loader);
3569 }
3570 }
3571 return NULL;
3572 JVM_END
3573
3574
3575 // Load a class relative to the most recent class on the stack with a non-null
3576 // classloader.
3577 // This function has been deprecated and should not be considered part of the
3578 // specified JVM interface.
3579
3580 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3581 jclass currClass, jstring currClassName))
3582 JVMWrapper("JVM_LoadClass0");
3583 // Receiver is not used
3584 ResourceMark rm(THREAD);
3585
3586 // Class name argument is not guaranteed to be in internal format
3587 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3588 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3589
3590 const char* str = java_lang_String::as_utf8_string(string());
3591
3592 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3593 // It's impossible to create this class; the name cannot fit
3594 // into the constant pool.
3595 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3596 }
3597
3598 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3599 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3600 // Find the most recent class on the stack with a non-null classloader
3601 oop loader = NULL;
3602 oop protection_domain = NULL;
3603 if (curr_klass.is_null()) {
3604 for (vframeStream vfst(thread);
3605 !vfst.at_end() && loader == NULL;
3606 vfst.next()) {
3607 if (!vfst.method()->is_native()) {
3608 InstanceKlass* holder = vfst.method()->method_holder();
3609 loader = holder->class_loader();
3610 protection_domain = holder->protection_domain();
3611 }
3612 }
3613 } else {
3614 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3615 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3616 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3617 }
3618 Handle h_loader(THREAD, loader);
3619 Handle h_prot (THREAD, protection_domain);
3620 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3621 false, thread);
3622 if (TraceClassResolution && result != NULL) {
3623 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3624 }
3625 return result;
3626 JVM_END
3627
3628
3629 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3630
3631
3632 // resolve array handle and check arguments
3633 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3634 if (arr == NULL) {
3635 THROW_0(vmSymbols::java_lang_NullPointerException());
3636 }
3637 oop a = JNIHandles::resolve_non_null(arr);
3638 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3639 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3640 }
3641 return arrayOop(a);
3642 }
3643
3644
3645 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3646 JVMWrapper("JVM_GetArrayLength");
3647 arrayOop a = check_array(env, arr, false, CHECK_0);
3648 return a->length();
3649 JVM_END
3650
3651
3652 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3653 JVMWrapper("JVM_Array_Get");
3654 JvmtiVMObjectAllocEventCollector oam;
3655 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3656 jvalue value;
3657 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3658 oop box = Reflection::box(&value, type, CHECK_NULL);
3659 return JNIHandles::make_local(env, box);
3660 JVM_END
3661
3662
3663 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3664 JVMWrapper("JVM_GetPrimitiveArrayElement");
3665 jvalue value;
3666 value.i = 0; // to initialize value before getting used in CHECK
3667 arrayOop a = check_array(env, arr, true, CHECK_(value));
3668 assert(a->is_typeArray(), "just checking");
3669 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3670 BasicType wide_type = (BasicType) wCode;
3671 if (type != wide_type) {
3672 Reflection::widen(&value, type, wide_type, CHECK_(value));
3673 }
3674 return value;
3675 JVM_END
3676
3677
3678 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3679 JVMWrapper("JVM_SetArrayElement");
3680 arrayOop a = check_array(env, arr, false, CHECK);
3681 oop box = JNIHandles::resolve(val);
3682 jvalue value;
3683 value.i = 0; // to initialize value before getting used in CHECK
3684 BasicType value_type;
3685 if (a->is_objArray()) {
3686 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3687 value_type = Reflection::unbox_for_regular_object(box, &value);
3688 } else {
3689 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3690 }
3691 Reflection::array_set(&value, a, index, value_type, CHECK);
3692 JVM_END
3693
3694
3695 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3696 JVMWrapper("JVM_SetPrimitiveArrayElement");
3697 arrayOop a = check_array(env, arr, true, CHECK);
3698 assert(a->is_typeArray(), "just checking");
3699 BasicType value_type = (BasicType) vCode;
3700 Reflection::array_set(&v, a, index, value_type, CHECK);
3701 JVM_END
3702
3703
3704 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3705 JVMWrapper("JVM_NewArray");
3706 JvmtiVMObjectAllocEventCollector oam;
3707 oop element_mirror = JNIHandles::resolve(eltClass);
3708 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3709 return JNIHandles::make_local(env, result);
3710 JVM_END
3711
3712
3713 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3714 JVMWrapper("JVM_NewMultiArray");
3715 JvmtiVMObjectAllocEventCollector oam;
3716 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3717 oop element_mirror = JNIHandles::resolve(eltClass);
3718 assert(dim_array->is_typeArray(), "just checking");
3719 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3720 return JNIHandles::make_local(env, result);
3721 JVM_END
3722
3723
3724 // Networking library support ////////////////////////////////////////////////////////////////////
3725
3726 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3727 JVMWrapper("JVM_InitializeSocketLibrary");
3728 return 0;
3729 JVM_END
3730
3731
3732 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3733 JVMWrapper("JVM_Socket");
3734 return os::socket(domain, type, protocol);
3735 JVM_END
3736
3737
3738 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3739 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3740 //%note jvm_r6
3741 return os::socket_close(fd);
3742 JVM_END
3743
3744
3745 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3746 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3747 //%note jvm_r6
3748 return os::socket_shutdown(fd, howto);
3749 JVM_END
3750
3751
3752 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3753 JVMWrapper2("JVM_Recv (0x%x)", fd);
3754 //%note jvm_r6
3755 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3756 JVM_END
3757
3758
3759 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3760 JVMWrapper2("JVM_Send (0x%x)", fd);
3761 //%note jvm_r6
3762 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3763 JVM_END
3764
3765
3766 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3767 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3768 //%note jvm_r6
3769 return os::timeout(fd, timeout);
3770 JVM_END
3771
3772
3773 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3774 JVMWrapper2("JVM_Listen (0x%x)", fd);
3775 //%note jvm_r6
3776 return os::listen(fd, count);
3777 JVM_END
3778
3779
3780 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3781 JVMWrapper2("JVM_Connect (0x%x)", fd);
3782 //%note jvm_r6
3783 return os::connect(fd, him, (socklen_t)len);
3784 JVM_END
3785
3786
3787 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3788 JVMWrapper2("JVM_Bind (0x%x)", fd);
3789 //%note jvm_r6
3790 return os::bind(fd, him, (socklen_t)len);
3791 JVM_END
3792
3793
3794 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3795 JVMWrapper2("JVM_Accept (0x%x)", fd);
3796 //%note jvm_r6
3797 socklen_t socklen = (socklen_t)(*len);
3798 jint result = os::accept(fd, him, &socklen);
3799 *len = (jint)socklen;
3800 return result;
3801 JVM_END
3802
3803
3804 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3805 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3806 //%note jvm_r6
3807 socklen_t socklen = (socklen_t)(*fromlen);
3808 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3809 *fromlen = (int)socklen;
3810 return result;
3811 JVM_END
3812
3813
3814 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3815 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3816 //%note jvm_r6
3817 socklen_t socklen = (socklen_t)(*len);
3818 jint result = os::get_sock_name(fd, him, &socklen);
3819 *len = (int)socklen;
3820 return result;
3821 JVM_END
3822
3823
3824 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3825 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3826 //%note jvm_r6
3827 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3828 JVM_END
3829
3830
3831 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3832 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3833 //%note jvm_r6
3834 return os::socket_available(fd, pbytes);
3835 JVM_END
3836
3837
3838 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3839 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3840 //%note jvm_r6
3841 socklen_t socklen = (socklen_t)(*optlen);
3842 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3843 *optlen = (int)socklen;
3844 return result;
3845 JVM_END
3846
3847
3848 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3849 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3850 //%note jvm_r6
3851 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3852 JVM_END
3853
3854
3855 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3856 JVMWrapper("JVM_GetHostName");
3857 return os::get_host_name(name, namelen);
3858 JVM_END
3859
3860
3861 // Library support ///////////////////////////////////////////////////////////////////////////
3862
3863 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3864 //%note jvm_ct
3865 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3866 char ebuf[1024];
3867 void *load_result;
3868 {
3869 ThreadToNativeFromVM ttnfvm(thread);
3870 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3871 }
3872 if (load_result == NULL) {
3873 char msg[1024];
3874 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3875 // Since 'ebuf' may contain a string encoded using
3876 // platform encoding scheme, we need to pass
3877 // Exceptions::unsafe_to_utf8 to the new_exception method
3878 // as the last argument. See bug 6367357.
3879 Handle h_exception =
3880 Exceptions::new_exception(thread,
3881 vmSymbols::java_lang_UnsatisfiedLinkError(),
3882 msg, Exceptions::unsafe_to_utf8);
3883
3884 THROW_HANDLE_0(h_exception);
3885 }
3886 return load_result;
3887 JVM_END
3888
3889
3890 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3891 JVMWrapper("JVM_UnloadLibrary");
3892 os::dll_unload(handle);
3893 JVM_END
3894
3895
3896 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3897 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3898 return os::dll_lookup(handle, name);
3899 JVM_END
3900
3901
3902 // Floating point support ////////////////////////////////////////////////////////////////////
3903
3904 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3905 JVMWrapper("JVM_IsNaN");
3906 return g_isnan(a);
3907 JVM_END
3908
3909
3910 // JNI version ///////////////////////////////////////////////////////////////////////////////
3911
3912 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3913 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3914 return Threads::is_supported_jni_version_including_1_1(version);
3915 JVM_END
3916
3917
3918 // String support ///////////////////////////////////////////////////////////////////////////
3919
3920 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3921 JVMWrapper("JVM_InternString");
3922 JvmtiVMObjectAllocEventCollector oam;
3923 if (str == NULL) return NULL;
3924 oop string = JNIHandles::resolve_non_null(str);
3925 oop result = StringTable::intern(string, CHECK_NULL);
3926 return (jstring) JNIHandles::make_local(env, result);
3927 JVM_END
3928
3929
3930 // Raw monitor support //////////////////////////////////////////////////////////////////////
3931
3932 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3933 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3934 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3935 // that only works with java threads.
3936
3937
3938 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3939 VM_Exit::block_if_vm_exited();
3940 JVMWrapper("JVM_RawMonitorCreate");
3941 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3942 }
3943
3944
3945 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3946 VM_Exit::block_if_vm_exited();
3947 JVMWrapper("JVM_RawMonitorDestroy");
3948 delete ((Mutex*) mon);
3949 }
3950
3951
3952 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3953 VM_Exit::block_if_vm_exited();
3954 JVMWrapper("JVM_RawMonitorEnter");
3955 ((Mutex*) mon)->jvm_raw_lock();
3956 return 0;
3957 }
3958
3959
3960 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3961 VM_Exit::block_if_vm_exited();
3962 JVMWrapper("JVM_RawMonitorExit");
3963 ((Mutex*) mon)->jvm_raw_unlock();
3964 }
3965
3966
3967 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3968
3969 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3970 Handle loader, Handle protection_domain,
3971 jboolean throwError, TRAPS) {
3972 // Security Note:
3973 // The Java level wrapper will perform the necessary security check allowing
3974 // us to pass the NULL as the initiating class loader. The VM is responsible for
3975 // the checkPackageAccess relative to the initiating class loader via the
3976 // protection_domain. The protection_domain is passed as NULL by the java code
3977 // if there is no security manager in 3-arg Class.forName().
3978 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3979
3980 KlassHandle klass_handle(THREAD, klass);
3981 // Check if we should initialize the class
3982 if (init && klass_handle->oop_is_instance()) {
3983 klass_handle->initialize(CHECK_NULL);
3984 }
3985 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3986 }
3987
3988
3989 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3990
3991 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3992 JVMWrapper("JVM_InvokeMethod");
3993 Handle method_handle;
3994 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3995 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3996 Handle receiver(THREAD, JNIHandles::resolve(obj));
3997 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3998 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3999 jobject res = JNIHandles::make_local(env, result);
4000 if (JvmtiExport::should_post_vm_object_alloc()) {
4001 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4002 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4003 if (java_lang_Class::is_primitive(ret_type)) {
4004 // Only for primitive type vm allocates memory for java object.
4005 // See box() method.
4006 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4007 }
4008 }
4009 return res;
4010 } else {
4011 THROW_0(vmSymbols::java_lang_StackOverflowError());
4012 }
4013 JVM_END
4014
4015
4016 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4017 JVMWrapper("JVM_NewInstanceFromConstructor");
4018 oop constructor_mirror = JNIHandles::resolve(c);
4019 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4020 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4021 jobject res = JNIHandles::make_local(env, result);
4022 if (JvmtiExport::should_post_vm_object_alloc()) {
4023 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4024 }
4025 return res;
4026 JVM_END
4027
4028 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4029
4030 JVM_LEAF(jboolean, JVM_SupportsCX8())
4031 JVMWrapper("JVM_SupportsCX8");
4032 return VM_Version::supports_cx8();
4033 JVM_END
4034
4035
4036 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4037 JVMWrapper("JVM_CX8Field");
4038 jlong res;
4039 oop o = JNIHandles::resolve(obj);
4040 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4041 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4042
4043 assert(VM_Version::supports_cx8(), "cx8 not supported");
4044 res = Atomic::cmpxchg(newVal, addr, oldVal);
4045
4046 return res == oldVal;
4047 JVM_END
4048
4049 // DTrace ///////////////////////////////////////////////////////////////////
4050
4051 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4052 JVMWrapper("JVM_DTraceGetVersion");
4053 return (jint)JVM_TRACING_DTRACE_VERSION;
4054 JVM_END
4055
4056 JVM_ENTRY(jlong,JVM_DTraceActivate(
4057 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4058 JVM_DTraceProvider* providers))
4059 JVMWrapper("JVM_DTraceActivate");
4060 return DTraceJSDT::activate(
4061 version, module_name, providers_count, providers, CHECK_0);
4062 JVM_END
4063
4064 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4065 JVMWrapper("JVM_DTraceIsProbeEnabled");
4066 return DTraceJSDT::is_probe_enabled(method);
4067 JVM_END
4068
4069 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4070 JVMWrapper("JVM_DTraceDispose");
4071 DTraceJSDT::dispose(handle);
4072 JVM_END
4073
4074 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4075 JVMWrapper("JVM_DTraceIsSupported");
4076 return DTraceJSDT::is_supported();
4077 JVM_END
4078
4079 // Returns an array of all live Thread objects (VM internal JavaThreads,
4080 // jvmti agent threads, and JNI attaching threads are skipped)
4081 // See CR 6404306 regarding JNI attaching threads
4082 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4083 ResourceMark rm(THREAD);
4084 ThreadsListEnumerator tle(THREAD, false, false);
4085 JvmtiVMObjectAllocEventCollector oam;
4086
4087 int num_threads = tle.num_threads();
4088 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4089 objArrayHandle threads_ah(THREAD, r);
4090
4091 for (int i = 0; i < num_threads; i++) {
4092 Handle h = tle.get_threadObj(i);
4093 threads_ah->obj_at_put(i, h());
4094 }
4095
4096 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4097 JVM_END
4098
4099
4100 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4101 // Return StackTraceElement[][], each element is the stack trace of a thread in
4102 // the corresponding entry in the given threads array
4103 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4104 JVMWrapper("JVM_DumpThreads");
4105 JvmtiVMObjectAllocEventCollector oam;
4106
4107 // Check if threads is null
4108 if (threads == NULL) {
4109 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4110 }
4111
4112 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4113 objArrayHandle ah(THREAD, a);
4114 int num_threads = ah->length();
4115 // check if threads is non-empty array
4116 if (num_threads == 0) {
4117 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4118 }
4119
4120 // check if threads is not an array of objects of Thread class
4121 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4122 if (k != SystemDictionary::Thread_klass()) {
4123 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4124 }
4125
4126 ResourceMark rm(THREAD);
4127
4128 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4129 for (int i = 0; i < num_threads; i++) {
4130 oop thread_obj = ah->obj_at(i);
4131 instanceHandle h(THREAD, (instanceOop) thread_obj);
4132 thread_handle_array->append(h);
4133 }
4134
4135 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4136 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4137
4138 JVM_END
4139
4140 // JVM monitoring and management support
4141 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4142 return Management::get_jmm_interface(version);
4143 JVM_END
4144
4145 // com.sun.tools.attach.VirtualMachine agent properties support
4146 //
4147 // Initialize the agent properties with the properties maintained in the VM
4148 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4149 JVMWrapper("JVM_InitAgentProperties");
4150 ResourceMark rm;
4151
4152 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4153
4154 PUTPROP(props, "sun.java.command", Arguments::java_command());
4155 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4156 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4157 return properties;
4158 JVM_END
4159
4160 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4161 {
4162 JVMWrapper("JVM_GetEnclosingMethodInfo");
4163 JvmtiVMObjectAllocEventCollector oam;
4164
4165 if (ofClass == NULL) {
4166 return NULL;
4167 }
4168 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4169 // Special handling for primitive objects
4170 if (java_lang_Class::is_primitive(mirror())) {
4171 return NULL;
4172 }
4173 Klass* k = java_lang_Class::as_Klass(mirror());
4174 if (!k->oop_is_instance()) {
4175 return NULL;
4176 }
4177 instanceKlassHandle ik_h(THREAD, k);
4178 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4179 if (encl_method_class_idx == 0) {
4180 return NULL;
4181 }
4182 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4183 objArrayHandle dest(THREAD, dest_o);
4184 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4185 dest->obj_at_put(0, enc_k->java_mirror());
4186 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4187 if (encl_method_method_idx != 0) {
4188 Symbol* sym = ik_h->constants()->symbol_at(
4189 extract_low_short_from_int(
4190 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4191 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4192 dest->obj_at_put(1, str());
4193 sym = ik_h->constants()->symbol_at(
4194 extract_high_short_from_int(
4195 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4196 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4197 dest->obj_at_put(2, str());
4198 }
4199 return (jobjectArray) JNIHandles::make_local(dest());
4200 }
4201 JVM_END
4202
4203 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4204 jint javaThreadState))
4205 {
4206 // If new thread states are added in future JDK and VM versions,
4207 // this should check if the JDK version is compatible with thread
4208 // states supported by the VM. Return NULL if not compatible.
4209 //
4210 // This function must map the VM java_lang_Thread::ThreadStatus
4211 // to the Java thread state that the JDK supports.
4212 //
4213
4214 typeArrayHandle values_h;
4215 switch (javaThreadState) {
4216 case JAVA_THREAD_STATE_NEW : {
4217 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4218 values_h = typeArrayHandle(THREAD, r);
4219 values_h->int_at_put(0, java_lang_Thread::NEW);
4220 break;
4221 }
4222 case JAVA_THREAD_STATE_RUNNABLE : {
4223 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4224 values_h = typeArrayHandle(THREAD, r);
4225 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4226 break;
4227 }
4228 case JAVA_THREAD_STATE_BLOCKED : {
4229 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4230 values_h = typeArrayHandle(THREAD, r);
4231 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4232 break;
4233 }
4234 case JAVA_THREAD_STATE_WAITING : {
4235 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4236 values_h = typeArrayHandle(THREAD, r);
4237 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4238 values_h->int_at_put(1, java_lang_Thread::PARKED);
4239 break;
4240 }
4241 case JAVA_THREAD_STATE_TIMED_WAITING : {
4242 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4243 values_h = typeArrayHandle(THREAD, r);
4244 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4245 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4246 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4247 break;
4248 }
4249 case JAVA_THREAD_STATE_TERMINATED : {
4250 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4251 values_h = typeArrayHandle(THREAD, r);
4252 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4253 break;
4254 }
4255 default:
4256 // Unknown state - probably incompatible JDK version
4257 return NULL;
4258 }
4259
4260 return (jintArray) JNIHandles::make_local(env, values_h());
4261 }
4262 JVM_END
4263
4264
4265 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4266 jint javaThreadState,
4267 jintArray values))
4268 {
4269 // If new thread states are added in future JDK and VM versions,
4270 // this should check if the JDK version is compatible with thread
4271 // states supported by the VM. Return NULL if not compatible.
4272 //
4273 // This function must map the VM java_lang_Thread::ThreadStatus
4274 // to the Java thread state that the JDK supports.
4275 //
4276
4277 ResourceMark rm;
4278
4279 // Check if threads is null
4280 if (values == NULL) {
4281 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4282 }
4283
4284 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4285 typeArrayHandle values_h(THREAD, v);
4286
4287 objArrayHandle names_h;
4288 switch (javaThreadState) {
4289 case JAVA_THREAD_STATE_NEW : {
4290 assert(values_h->length() == 1 &&
4291 values_h->int_at(0) == java_lang_Thread::NEW,
4292 "Invalid threadStatus value");
4293
4294 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4295 1, /* only 1 substate */
4296 CHECK_NULL);
4297 names_h = objArrayHandle(THREAD, r);
4298 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4299 names_h->obj_at_put(0, name());
4300 break;
4301 }
4302 case JAVA_THREAD_STATE_RUNNABLE : {
4303 assert(values_h->length() == 1 &&
4304 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4305 "Invalid threadStatus value");
4306
4307 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4308 1, /* only 1 substate */
4309 CHECK_NULL);
4310 names_h = objArrayHandle(THREAD, r);
4311 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4312 names_h->obj_at_put(0, name());
4313 break;
4314 }
4315 case JAVA_THREAD_STATE_BLOCKED : {
4316 assert(values_h->length() == 1 &&
4317 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4318 "Invalid threadStatus value");
4319
4320 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4321 1, /* only 1 substate */
4322 CHECK_NULL);
4323 names_h = objArrayHandle(THREAD, r);
4324 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4325 names_h->obj_at_put(0, name());
4326 break;
4327 }
4328 case JAVA_THREAD_STATE_WAITING : {
4329 assert(values_h->length() == 2 &&
4330 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4331 values_h->int_at(1) == java_lang_Thread::PARKED,
4332 "Invalid threadStatus value");
4333 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4334 2, /* number of substates */
4335 CHECK_NULL);
4336 names_h = objArrayHandle(THREAD, r);
4337 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4338 CHECK_NULL);
4339 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4340 CHECK_NULL);
4341 names_h->obj_at_put(0, name0());
4342 names_h->obj_at_put(1, name1());
4343 break;
4344 }
4345 case JAVA_THREAD_STATE_TIMED_WAITING : {
4346 assert(values_h->length() == 3 &&
4347 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4348 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4349 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4350 "Invalid threadStatus value");
4351 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4352 3, /* number of substates */
4353 CHECK_NULL);
4354 names_h = objArrayHandle(THREAD, r);
4355 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4356 CHECK_NULL);
4357 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4358 CHECK_NULL);
4359 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4360 CHECK_NULL);
4361 names_h->obj_at_put(0, name0());
4362 names_h->obj_at_put(1, name1());
4363 names_h->obj_at_put(2, name2());
4364 break;
4365 }
4366 case JAVA_THREAD_STATE_TERMINATED : {
4367 assert(values_h->length() == 1 &&
4368 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4369 "Invalid threadStatus value");
4370 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4371 1, /* only 1 substate */
4372 CHECK_NULL);
4373 names_h = objArrayHandle(THREAD, r);
4374 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4375 names_h->obj_at_put(0, name());
4376 break;
4377 }
4378 default:
4379 // Unknown state - probably incompatible JDK version
4380 return NULL;
4381 }
4382 return (jobjectArray) JNIHandles::make_local(env, names_h());
4383 }
4384 JVM_END
4385
4386 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4387 {
4388 memset(info, 0, info_size);
4389
4390 info->jvm_version = Abstract_VM_Version::jvm_version();
4391 info->update_version = 0; /* 0 in HotSpot Express VM */
4392 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4393
4394 // when we add a new capability in the jvm_version_info struct, we should also
4395 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4396 // counter defined in runtimeService.cpp.
4397 info->is_attachable = AttachListener::is_attach_supported();
4398 }
4399 JVM_END