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/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "interpreter/bytecode.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/method.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "prims/privilegedStack.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/dtraceJSDT.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jfieldIDWorkaround.hpp"
54 #include "runtime/os.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vm_operations.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/management.hpp"
61 #include "services/threadService.hpp"
62 #include "trace/tracing.hpp"
63 #include "utilities/copy.hpp"
64 #include "utilities/defaultStream.hpp"
65 #include "utilities/dtrace.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/histogram.hpp"
68 #include "utilities/top.hpp"
69 #include "utilities/utf8.hpp"
70 #ifdef TARGET_OS_FAMILY_linux
71 # include "jvm_linux.h"
72 #endif
73 #ifdef TARGET_OS_FAMILY_solaris
74 # include "jvm_solaris.h"
75 #endif
76 #ifdef TARGET_OS_FAMILY_windows
77 # include "jvm_windows.h"
78 #endif
79 #ifdef TARGET_OS_FAMILY_aix
80 # include "jvm_aix.h"
81 #endif
82 #ifdef TARGET_OS_FAMILY_bsd
83 # include "jvm_bsd.h"
84 #endif
85
86 #include <errno.h>
87
88 /*
89 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
90 such ctors and calls MUST NOT come between an oop declaration/init and its
91 usage because if objects are move this may cause various memory stomps, bus
92 errors and segfaults. Here is a cookbook for causing so called "naked oop
93 failures":
94
95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
96 JVMWrapper("JVM_GetClassDeclaredFields");
97
98 // Object address to be held directly in mirror & not visible to GC
99 oop mirror = JNIHandles::resolve_non_null(ofClass);
100
101 // If this ctor can hit a safepoint, moving objects around, then
102 ComplexConstructor foo;
103
104 // Boom! mirror may point to JUNK instead of the intended object
105 (some dereference of mirror)
106
107 // Here's another call that may block for GC, making mirror stale
108 MutexLocker ml(some_lock);
109
110 // And here's an initializer that can result in a stale oop
111 // all in one step.
112 oop o = call_that_can_throw_exception(TRAPS);
113
114
115 The solution is to keep the oop declaration BELOW the ctor or function
116 call that might cause a GC, do another resolve to reassign the oop, or
117 consider use of a Handle instead of an oop so there is immunity from object
118 motion. But note that the "QUICK" entries below do not have a handlemark
119 and thus can only support use of handles passed in.
120 */
121
122 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
123 ResourceMark rm;
124 int line_number = -1;
125 const char * source_file = NULL;
126 const char * trace = "explicit";
127 InstanceKlass* caller = NULL;
128 JavaThread* jthread = JavaThread::current();
129 if (jthread->has_last_Java_frame()) {
130 vframeStream vfst(jthread);
131
132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
134 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
136 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
137
138 Method* last_caller = NULL;
139
140 while (!vfst.at_end()) {
141 Method* m = vfst.method();
142 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
143 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
144 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
145 break;
146 }
147 last_caller = m;
148 vfst.next();
149 }
150 // if this is called from Class.forName0 and that is called from Class.forName,
151 // then print the caller of Class.forName. If this is Class.loadClass, then print
152 // that caller, otherwise keep quiet since this should be picked up elsewhere.
153 bool found_it = false;
154 if (!vfst.at_end() &&
155 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
156 vfst.method()->name() == vmSymbols::forName0_name()) {
157 vfst.next();
158 if (!vfst.at_end() &&
159 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
160 vfst.method()->name() == vmSymbols::forName_name()) {
161 vfst.next();
162 found_it = true;
163 }
164 } else if (last_caller != NULL &&
165 last_caller->method_holder()->name() ==
166 vmSymbols::java_lang_ClassLoader() &&
167 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
168 last_caller->name() == vmSymbols::loadClass_name())) {
169 found_it = true;
170 } else if (!vfst.at_end()) {
171 if (vfst.method()->is_native()) {
172 // JNI call
173 found_it = true;
174 }
175 }
176 if (found_it && !vfst.at_end()) {
177 // found the caller
178 caller = vfst.method()->method_holder();
179 line_number = vfst.method()->line_number_from_bci(vfst.bci());
180 if (line_number == -1) {
181 // show method name if it's a native method
182 trace = vfst.method()->name_and_sig_as_C_string();
183 }
184 Symbol* s = caller->source_file_name();
185 if (s != NULL) {
186 source_file = s->as_C_string();
187 }
188 }
189 }
190 if (caller != NULL) {
191 if (to_class != caller) {
192 const char * from = caller->external_name();
193 const char * to = to_class->external_name();
194 // print in a single call to reduce interleaving between threads
195 if (source_file != NULL) {
196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
197 } else {
198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
199 }
200 }
201 }
202 }
203
204 void trace_class_resolution(Klass* to_class) {
205 EXCEPTION_MARK;
206 trace_class_resolution_impl(to_class, THREAD);
207 if (HAS_PENDING_EXCEPTION) {
208 CLEAR_PENDING_EXCEPTION;
209 }
210 }
211
212 // Wrapper to trace JVM functions
213
214 #ifdef ASSERT
215 class JVMTraceWrapper : public StackObj {
216 public:
217 JVMTraceWrapper(const char* format, ...) {
218 if (TraceJVMCalls) {
219 va_list ap;
220 va_start(ap, format);
221 tty->print("JVM ");
222 tty->vprint_cr(format, ap);
223 va_end(ap);
224 }
225 }
226 };
227
228 Histogram* JVMHistogram;
229 volatile jint JVMHistogram_lock = 0;
230
231 class JVMHistogramElement : public HistogramElement {
232 public:
233 JVMHistogramElement(const char* name);
234 };
235
236 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
237 _name = elementName;
238 uintx count = 0;
239
240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
242 count +=1;
243 if ( (WarnOnStalledSpinLock > 0)
244 && (count % WarnOnStalledSpinLock == 0)) {
245 warning("JVMHistogram_lock seems to be stalled");
246 }
247 }
248 }
249
250 if(JVMHistogram == NULL)
251 JVMHistogram = new Histogram("JVM Call Counts",100);
252
253 JVMHistogram->add_element(this);
254 Atomic::dec(&JVMHistogram_lock);
255 }
256
257 #define JVMCountWrapper(arg) \
258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
260
261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
265 #else
266 #define JVMWrapper(arg1)
267 #define JVMWrapper2(arg1, arg2)
268 #define JVMWrapper3(arg1, arg2, arg3)
269 #define JVMWrapper4(arg1, arg2, arg3, arg4)
270 #endif
271
272
273 // Interface version /////////////////////////////////////////////////////////////////////
274
275
276 JVM_LEAF(jint, JVM_GetInterfaceVersion())
277 return JVM_INTERFACE_VERSION;
278 JVM_END
279
280
281 // java.lang.System //////////////////////////////////////////////////////////////////////
282
283
284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
285 JVMWrapper("JVM_CurrentTimeMillis");
286 return os::javaTimeMillis();
287 JVM_END
288
289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
290 JVMWrapper("JVM_NanoTime");
291 return os::javaTimeNanos();
292 JVM_END
293
294
295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
296 jobject dst, jint dst_pos, jint length))
297 JVMWrapper("JVM_ArrayCopy");
298 // Check if we have null pointers
299 if (src == NULL || dst == NULL) {
300 THROW(vmSymbols::java_lang_NullPointerException());
301 }
302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
306 // Do copy
307 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
308 JVM_END
309
310
311 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
312 JavaValue r(T_OBJECT);
313 // public synchronized Object put(Object key, Object value);
314 HandleMark hm(THREAD);
315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
317 JavaCalls::call_virtual(&r,
318 props,
319 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
320 vmSymbols::put_name(),
321 vmSymbols::object_object_object_signature(),
322 key_str,
323 value_str,
324 THREAD);
325 }
326
327
328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
329
330
331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
332 JVMWrapper("JVM_InitProperties");
333 ResourceMark rm;
334
335 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
336
337 // System property list includes both user set via -D option and
338 // jvm system specific properties.
339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
340 PUTPROP(props, p->key(), p->value());
341 }
342
343 // Convert the -XX:MaxDirectMemorySize= command line flag
344 // to the sun.nio.MaxDirectMemorySize property.
345 // Do this after setting user properties to prevent people
346 // from setting the value with a -D option, as requested.
347 {
348 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
349 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
350 } else {
351 char as_chars[256];
352 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
353 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
354 }
355 }
356
357 // JVM monitoring and management support
358 // Add the sun.management.compiler property for the compiler's name
359 {
360 #undef CSIZE
361 #if defined(_LP64) || defined(_WIN64)
362 #define CSIZE "64-Bit "
363 #else
364 #define CSIZE
365 #endif // 64bit
366
367 #ifdef TIERED
368 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
369 #else
370 #if defined(COMPILER1)
371 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
372 #elif defined(COMPILER2)
373 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
374 #else
375 const char* compiler_name = "";
376 #endif // compilers
377 #endif // TIERED
378
379 if (*compiler_name != '\0' &&
380 (Arguments::mode() != Arguments::_int)) {
381 PUTPROP(props, "sun.management.compiler", compiler_name);
382 }
383 }
384
385 return properties;
386 JVM_END
387
388
389 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
390
391 extern volatile jint vm_created;
392
393 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
394 if (vm_created != 0 && (code == 0)) {
395 // The VM is about to exit. We call back into Java to check whether finalizers should be run
396 Universe::run_finalizers_on_exit();
397 }
398 before_exit(thread);
399 vm_exit(code);
400 JVM_END
401
402
403 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
404 before_exit(thread);
405 vm_exit(code);
406 JVM_END
407
408
409 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
410 register_on_exit_function(func);
411 JVM_END
412
413
414 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
415 JVMWrapper("JVM_GC");
416 if (!DisableExplicitGC) {
417 Universe::heap()->collect(GCCause::_java_lang_system_gc);
418 }
419 JVM_END
420
421
422 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
423 JVMWrapper("JVM_MaxObjectInspectionAge");
424 return Universe::heap()->millis_since_last_gc();
425 JVM_END
426
427
428 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
429 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
430 JVM_END
431
432
433 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
434 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
435 JVM_END
436
437 static inline jlong convert_size_t_to_jlong(size_t val) {
438 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
439 NOT_LP64 (return (jlong)val;)
440 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
441 }
442
443 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
444 JVMWrapper("JVM_TotalMemory");
445 size_t n = Universe::heap()->capacity();
446 return convert_size_t_to_jlong(n);
447 JVM_END
448
449
450 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
451 JVMWrapper("JVM_FreeMemory");
452 CollectedHeap* ch = Universe::heap();
453 size_t n;
454 {
455 MutexLocker x(Heap_lock);
456 n = ch->capacity() - ch->used();
457 }
458 return convert_size_t_to_jlong(n);
459 JVM_END
460
461
462 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
463 JVMWrapper("JVM_MaxMemory");
464 size_t n = Universe::heap()->max_capacity();
465 return convert_size_t_to_jlong(n);
466 JVM_END
467
468
469 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
470 JVMWrapper("JVM_ActiveProcessorCount");
471 return os::active_processor_count();
472 JVM_END
473
474
475
476 // java.lang.Throwable //////////////////////////////////////////////////////
477
478
479 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
480 JVMWrapper("JVM_FillInStackTrace");
481 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
482 java_lang_Throwable::fill_in_stack_trace(exception);
483 JVM_END
484
485
486 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
487 JVMWrapper("JVM_GetStackTraceDepth");
488 oop exception = JNIHandles::resolve(throwable);
489 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
490 JVM_END
491
492
493 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
494 JVMWrapper("JVM_GetStackTraceElement");
495 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
496 oop exception = JNIHandles::resolve(throwable);
497 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
498 return JNIHandles::make_local(env, element);
499 JVM_END
500
501
502 // java.lang.Object ///////////////////////////////////////////////
503
504
505 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
506 JVMWrapper("JVM_IHashCode");
507 // as implemented in the classic virtual machine; return 0 if object is NULL
508 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
509 JVM_END
510
511
512 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
513 JVMWrapper("JVM_MonitorWait");
514 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
515 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
516 if (JvmtiExport::should_post_monitor_wait()) {
517 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
518
519 // The current thread already owns the monitor and it has not yet
520 // been added to the wait queue so the current thread cannot be
521 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
522 // event handler cannot accidentally consume an unpark() meant for
523 // the ParkEvent associated with this ObjectMonitor.
524 }
525 ObjectSynchronizer::wait(obj, ms, CHECK);
526 JVM_END
527
528
529 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
530 JVMWrapper("JVM_MonitorNotify");
531 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
532 ObjectSynchronizer::notify(obj, CHECK);
533 JVM_END
534
535
536 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
537 JVMWrapper("JVM_MonitorNotifyAll");
538 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
539 ObjectSynchronizer::notifyall(obj, CHECK);
540 JVM_END
541
542
543 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
544 JVMWrapper("JVM_Clone");
545 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
546 const KlassHandle klass (THREAD, obj->klass());
547 JvmtiVMObjectAllocEventCollector oam;
548
549 #ifdef ASSERT
550 // Just checking that the cloneable flag is set correct
551 if (obj->is_array()) {
552 guarantee(klass->is_cloneable(), "all arrays are cloneable");
553 } else {
554 guarantee(obj->is_instance(), "should be instanceOop");
555 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
556 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
557 }
558 #endif
559
560 // Check if class of obj supports the Cloneable interface.
561 // All arrays are considered to be cloneable (See JLS 20.1.5)
562 if (!klass->is_cloneable()) {
563 ResourceMark rm(THREAD);
564 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
565 }
566
567 // Make shallow object copy
568 const int size = obj->size();
569 oop new_obj = NULL;
570 if (obj->is_array()) {
571 const int length = ((arrayOop)obj())->length();
572 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
573 } else {
574 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
575 }
576 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
577 // is modifying a reference field in the clonee, a non-oop-atomic copy might
578 // be suspended in the middle of copying the pointer and end up with parts
579 // of two different pointers in the field. Subsequent dereferences will crash.
580 // 4846409: an oop-copy of objects with long or double fields or arrays of same
581 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
582 // of oops. We know objects are aligned on a minimum of an jlong boundary.
583 // The same is true of StubRoutines::object_copy and the various oop_copy
584 // variants, and of the code generated by the inline_native_clone intrinsic.
585 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
586 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
587 (size_t)align_object_size(size) / HeapWordsPerLong);
588 // Clear the header
589 new_obj->init_mark();
590
591 // Store check (mark entire object and let gc sort it out)
592 BarrierSet* bs = Universe::heap()->barrier_set();
593 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
594 bs->write_region(MemRegion((HeapWord*)new_obj, size));
595
596 // Caution: this involves a java upcall, so the clone should be
597 // "gc-robust" by this stage.
598 if (klass->has_finalizer()) {
599 assert(obj->is_instance(), "should be instanceOop");
600 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
601 }
602
603 return JNIHandles::make_local(env, oop(new_obj));
604 JVM_END
605
606 // java.lang.Compiler ////////////////////////////////////////////////////
607
608 // The initial cuts of the HotSpot VM will not support JITs, and all existing
609 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
610 // functions are all silently ignored unless JVM warnings are printed.
611
612 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
613 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
614 JVM_END
615
616
617 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
618 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
619 return JNI_FALSE;
620 JVM_END
621
622
623 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
624 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
625 return JNI_FALSE;
626 JVM_END
627
628
629 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
630 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
631 return JNI_FALSE;
632 JVM_END
633
634
635 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
636 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
637 return NULL;
638 JVM_END
639
640
641 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
642 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
643 JVM_END
644
645
646 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
647 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
648 JVM_END
649
650
651
652 // Error message support //////////////////////////////////////////////////////
653
654 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
655 JVMWrapper("JVM_GetLastErrorString");
656 return (jint)os::lasterror(buf, len);
657 JVM_END
658
659
660 // java.io.File ///////////////////////////////////////////////////////////////
661
662 JVM_LEAF(char*, JVM_NativePath(char* path))
663 JVMWrapper2("JVM_NativePath (%s)", path);
664 return os::native_path(path);
665 JVM_END
666
667
668 // Misc. class handling ///////////////////////////////////////////////////////////
669
670
671 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
672 JVMWrapper("JVM_GetCallerClass");
673
674 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
675 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
676 // temporarily for existing code to use until a replacement API is defined.
677 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
678 Klass* k = thread->security_get_caller_class(depth);
679 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
680 }
681
682 // Getting the class of the caller frame.
683 //
684 // The call stack at this point looks something like this:
685 //
686 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
687 // [1] [ @CallerSensitive API.method ]
688 // [.] [ (skipped intermediate frames) ]
689 // [n] [ caller ]
690 vframeStream vfst(thread);
691 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
692 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
693 Method* m = vfst.method();
694 assert(m != NULL, "sanity");
695 switch (n) {
696 case 0:
697 // This must only be called from Reflection.getCallerClass
698 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
699 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
700 }
701 // fall-through
702 case 1:
703 // Frame 0 and 1 must be caller sensitive.
704 if (!m->caller_sensitive()) {
705 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
706 }
707 break;
708 default:
709 if (!m->is_ignored_by_security_stack_walk()) {
710 // We have reached the desired frame; return the holder class.
711 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
712 }
713 break;
714 }
715 }
716 return NULL;
717 JVM_END
718
719
720 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
721 JVMWrapper("JVM_FindPrimitiveClass");
722 oop mirror = NULL;
723 BasicType t = name2type(utf);
724 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
725 mirror = Universe::java_mirror(t);
726 }
727 if (mirror == NULL) {
728 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
729 } else {
730 return (jclass) JNIHandles::make_local(env, mirror);
731 }
732 JVM_END
733
734
735 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
736 JVMWrapper("JVM_ResolveClass");
737 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
738 JVM_END
739
740
741 // Returns a class loaded by the bootstrap class loader; or null
742 // if not found. ClassNotFoundException is not thrown.
743 //
744 // Rationale behind JVM_FindClassFromBootLoader
745 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
746 // b> because of (a) java.dll has a direct dependecy on the unexported
747 // private symbol "_JVM_FindClassFromClassLoader@20".
748 // c> the launcher cannot use the private symbol as it dynamically opens
749 // the entry point, so if something changes, the launcher will fail
750 // unexpectedly at runtime, it is safest for the launcher to dlopen a
751 // stable exported interface.
752 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
753 // signature to change from _JVM_FindClassFromClassLoader@20 to
754 // JVM_FindClassFromClassLoader and will not be backward compatible
755 // with older JDKs.
756 // Thus a public/stable exported entry point is the right solution,
757 // public here means public in linker semantics, and is exported only
758 // to the JDK, and is not intended to be a public API.
759
760 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
761 const char* name))
762 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
763
764 // Java libraries should ensure that name is never null...
765 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
766 // It's impossible to create this class; the name cannot fit
767 // into the constant pool.
768 return NULL;
769 }
770
771 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
772 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
773 if (k == NULL) {
774 return NULL;
775 }
776
777 if (TraceClassResolution) {
778 trace_class_resolution(k);
779 }
780 return (jclass) JNIHandles::make_local(env, k->java_mirror());
781 JVM_END
782
783 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
784 jboolean init, jobject loader,
785 jboolean throwError))
786 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
787 throwError ? "error" : "exception");
788 // Java libraries should ensure that name is never null...
789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
790 // It's impossible to create this class; the name cannot fit
791 // into the constant pool.
792 if (throwError) {
793 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
794 } else {
795 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
796 }
797 }
798 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
799 Handle h_loader(THREAD, JNIHandles::resolve(loader));
800 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
801 Handle(), throwError, THREAD);
802
803 if (TraceClassResolution && result != NULL) {
804 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
805 }
806 return result;
807 JVM_END
808
809
810 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
811 jboolean init, jclass from))
812 JVMWrapper2("JVM_FindClassFromClass %s", name);
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
814 // It's impossible to create this class; the name cannot fit
815 // into the constant pool.
816 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
817 }
818 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
819 oop from_class_oop = JNIHandles::resolve(from);
820 Klass* from_class = (from_class_oop == NULL)
821 ? (Klass*)NULL
822 : java_lang_Class::as_Klass(from_class_oop);
823 oop class_loader = NULL;
824 oop protection_domain = NULL;
825 if (from_class != NULL) {
826 class_loader = from_class->class_loader();
827 protection_domain = from_class->protection_domain();
828 }
829 Handle h_loader(THREAD, class_loader);
830 Handle h_prot (THREAD, protection_domain);
831 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
832 h_prot, true, thread);
833
834 if (TraceClassResolution && result != NULL) {
835 // this function is generally only used for class loading during verification.
836 ResourceMark rm;
837 oop from_mirror = JNIHandles::resolve_non_null(from);
838 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
839 const char * from_name = from_class->external_name();
840
841 oop mirror = JNIHandles::resolve_non_null(result);
842 Klass* to_class = java_lang_Class::as_Klass(mirror);
843 const char * to = to_class->external_name();
844 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
845 }
846
847 return result;
848 JVM_END
849
850 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
851 if (loader.is_null()) {
852 return;
853 }
854
855 // check whether the current caller thread holds the lock or not.
856 // If not, increment the corresponding counter
857 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
858 ObjectSynchronizer::owner_self) {
859 counter->inc();
860 }
861 }
862
863 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
864 // and JVM_DefineClassWithSourceCond()
865 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
866 jobject loader, const jbyte *buf,
867 jsize len, jobject pd, const char *source,
868 jboolean verify, TRAPS) {
869 if (source == NULL) source = "__JVM_DefineClass__";
870
871 assert(THREAD->is_Java_thread(), "must be a JavaThread");
872 JavaThread* jt = (JavaThread*) THREAD;
873
874 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
875 ClassLoader::perf_define_appclass_selftime(),
876 ClassLoader::perf_define_appclasses(),
877 jt->get_thread_stat()->perf_recursion_counts_addr(),
878 jt->get_thread_stat()->perf_timers_addr(),
879 PerfClassTraceTime::DEFINE_CLASS);
880
881 if (UsePerfData) {
882 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
883 }
884
885 // Since exceptions can be thrown, class initialization can take place
886 // if name is NULL no check for class name in .class stream has to be made.
887 TempNewSymbol class_name = NULL;
888 if (name != NULL) {
889 const int str_len = (int)strlen(name);
890 if (str_len > Symbol::max_length()) {
891 // It's impossible to create this class; the name cannot fit
892 // into the constant pool.
893 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
894 }
895 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
896 }
897
898 ResourceMark rm(THREAD);
899 ClassFileStream st((u1*) buf, len, (char *)source);
900 Handle class_loader (THREAD, JNIHandles::resolve(loader));
901 if (UsePerfData) {
902 is_lock_held_by_thread(class_loader,
903 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
904 THREAD);
905 }
906 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
907 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
908 protection_domain, &st,
909 verify != 0,
910 CHECK_NULL);
911
912 if (TraceClassResolution && k != NULL) {
913 trace_class_resolution(k);
914 }
915
916 return (jclass) JNIHandles::make_local(env, k->java_mirror());
917 }
918
919
920 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
921 JVMWrapper2("JVM_DefineClass %s", name);
922
923 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
924 JVM_END
925
926
927 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
928 JVMWrapper2("JVM_DefineClassWithSource %s", name);
929
930 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
931 JVM_END
932
933 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
934 jobject loader, const jbyte *buf,
935 jsize len, jobject pd,
936 const char *source, jboolean verify))
937 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
938
939 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
940 JVM_END
941
942 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
943 JVMWrapper("JVM_FindLoadedClass");
944 ResourceMark rm(THREAD);
945
946 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
947 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
948
949 const char* str = java_lang_String::as_utf8_string(string());
950 // Sanity check, don't expect null
951 if (str == NULL) return NULL;
952
953 const int str_len = (int)strlen(str);
954 if (str_len > Symbol::max_length()) {
955 // It's impossible to create this class; the name cannot fit
956 // into the constant pool.
957 return NULL;
958 }
959 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
960
961 // Security Note:
962 // The Java level wrapper will perform the necessary security check allowing
963 // us to pass the NULL as the initiating class loader.
964 Handle h_loader(THREAD, JNIHandles::resolve(loader));
965 if (UsePerfData) {
966 is_lock_held_by_thread(h_loader,
967 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
968 THREAD);
969 }
970
971 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
972 h_loader,
973 Handle(),
974 CHECK_NULL);
975
976 return (k == NULL) ? NULL :
977 (jclass) JNIHandles::make_local(env, k->java_mirror());
978 JVM_END
979
980
981 // Reflection support //////////////////////////////////////////////////////////////////////////////
982
983 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
984 assert (cls != NULL, "illegal class");
985 JVMWrapper("JVM_GetClassName");
986 JvmtiVMObjectAllocEventCollector oam;
987 ResourceMark rm(THREAD);
988 const char* name;
989 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
990 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
991 } else {
992 // Consider caching interned string in Klass
993 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
994 assert(k->is_klass(), "just checking");
995 name = k->external_name();
996 }
997 oop result = StringTable::intern((char*) name, CHECK_NULL);
998 return (jstring) JNIHandles::make_local(env, result);
999 JVM_END
1000
1001
1002 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1003 JVMWrapper("JVM_GetClassInterfaces");
1004 JvmtiVMObjectAllocEventCollector oam;
1005 oop mirror = JNIHandles::resolve_non_null(cls);
1006
1007 // Special handling for primitive objects
1008 if (java_lang_Class::is_primitive(mirror)) {
1009 // Primitive objects does not have any interfaces
1010 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1011 return (jobjectArray) JNIHandles::make_local(env, r);
1012 }
1013
1014 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1015 // Figure size of result array
1016 int size;
1017 if (klass->oop_is_instance()) {
1018 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1019 } else {
1020 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1021 size = 2;
1022 }
1023
1024 // Allocate result array
1025 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1026 objArrayHandle result (THREAD, r);
1027 // Fill in result
1028 if (klass->oop_is_instance()) {
1029 // Regular instance klass, fill in all local interfaces
1030 for (int index = 0; index < size; index++) {
1031 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1032 result->obj_at_put(index, k->java_mirror());
1033 }
1034 } else {
1035 // All arrays implement java.lang.Cloneable and java.io.Serializable
1036 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1037 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1038 }
1039 return (jobjectArray) JNIHandles::make_local(env, result());
1040 JVM_END
1041
1042
1043 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1044 JVMWrapper("JVM_GetClassLoader");
1045 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1046 return NULL;
1047 }
1048 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1049 oop loader = k->class_loader();
1050 return JNIHandles::make_local(env, loader);
1051 JVM_END
1052
1053
1054 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1055 JVMWrapper("JVM_IsInterface");
1056 oop mirror = JNIHandles::resolve_non_null(cls);
1057 if (java_lang_Class::is_primitive(mirror)) {
1058 return JNI_FALSE;
1059 }
1060 Klass* k = java_lang_Class::as_Klass(mirror);
1061 jboolean result = k->is_interface();
1062 assert(!result || k->oop_is_instance(),
1063 "all interfaces are instance types");
1064 // The compiler intrinsic for isInterface tests the
1065 // Klass::_access_flags bits in the same way.
1066 return result;
1067 JVM_END
1068
1069
1070 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1071 JVMWrapper("JVM_GetClassSigners");
1072 JvmtiVMObjectAllocEventCollector oam;
1073 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1074 // There are no signers for primitive types
1075 return NULL;
1076 }
1077
1078 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1079
1080 // If there are no signers set in the class, or if the class
1081 // is an array, return NULL.
1082 if (signers == NULL) return NULL;
1083
1084 // copy of the signers array
1085 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1086 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1087 for (int index = 0; index < signers->length(); index++) {
1088 signers_copy->obj_at_put(index, signers->obj_at(index));
1089 }
1090
1091 // return the copy
1092 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1093 JVM_END
1094
1095
1096 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1097 JVMWrapper("JVM_SetClassSigners");
1098 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1099 // This call is ignored for primitive types and arrays.
1100 // Signers are only set once, ClassLoader.java, and thus shouldn't
1101 // be called with an array. Only the bootstrap loader creates arrays.
1102 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1103 if (k->oop_is_instance()) {
1104 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1105 }
1106 }
1107 JVM_END
1108
1109
1110 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1111 JVMWrapper("JVM_GetProtectionDomain");
1112 if (JNIHandles::resolve(cls) == NULL) {
1113 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1114 }
1115
1116 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1117 // Primitive types does not have a protection domain.
1118 return NULL;
1119 }
1120
1121 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1122 return (jobject) JNIHandles::make_local(env, pd);
1123 JVM_END
1124
1125
1126 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1127 // If there is a security manager and protection domain, check the access
1128 // in the protection domain, otherwise it is authorized.
1129 if (java_lang_System::has_security_manager()) {
1130
1131 // For bootstrapping, if pd implies method isn't in the JDK, allow
1132 // this context to revert to older behavior.
1133 // In this case the isAuthorized field in AccessControlContext is also not
1134 // present.
1135 if (Universe::protection_domain_implies_method() == NULL) {
1136 return true;
1137 }
1138
1139 // Whitelist certain access control contexts
1140 if (java_security_AccessControlContext::is_authorized(context)) {
1141 return true;
1142 }
1143
1144 oop prot = klass->protection_domain();
1145 if (prot != NULL) {
1146 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1147 // in the new wrapper.
1148 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1149 Handle h_prot(THREAD, prot);
1150 JavaValue result(T_BOOLEAN);
1151 JavaCallArguments args(h_prot);
1152 JavaCalls::call(&result, m, &args, CHECK_false);
1153 return (result.get_jboolean() != 0);
1154 }
1155 }
1156 return true;
1157 }
1158
1159 // Create an AccessControlContext with a protection domain with null codesource
1160 // and null permissions - which gives no permissions.
1161 oop create_dummy_access_control_context(TRAPS) {
1162 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1163 // new ProtectionDomain(null,null);
1164 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1165 Handle null_pd(THREAD, null_protection_domain);
1166
1167 // new ProtectionDomain[] {pd};
1168 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1169 context->obj_at_put(0, null_pd());
1170
1171 // new AccessControlContext(new ProtectionDomain[] {pd})
1172 objArrayHandle h_context(THREAD, context);
1173 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1174 return result;
1175 }
1176
1177 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1178 JVMWrapper("JVM_DoPrivileged");
1179
1180 if (action == NULL) {
1181 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1182 }
1183
1184 // Compute the frame initiating the do privileged operation and setup the privileged stack
1185 vframeStream vfst(thread);
1186 vfst.security_get_caller_frame(1);
1187
1188 if (vfst.at_end()) {
1189 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1190 }
1191
1192 Method* method = vfst.method();
1193 instanceKlassHandle klass (THREAD, method->method_holder());
1194
1195 // Check that action object understands "Object run()"
1196 Handle h_context;
1197 if (context != NULL) {
1198 h_context = Handle(THREAD, JNIHandles::resolve(context));
1199 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1200 if (!authorized) {
1201 // Create an unprivileged access control object and call it's run function
1202 // instead.
1203 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1204 h_context = Handle(THREAD, noprivs);
1205 }
1206 }
1207
1208 // Check that action object understands "Object run()"
1209 Handle object (THREAD, JNIHandles::resolve(action));
1210
1211 // get run() method
1212 Method* m_oop = object->klass()->uncached_lookup_method(
1213 vmSymbols::run_method_name(),
1214 vmSymbols::void_object_signature());
1215 methodHandle m (THREAD, m_oop);
1216 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1217 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1218 }
1219
1220 // Stack allocated list of privileged stack elements
1221 PrivilegedElement pi;
1222 if (!vfst.at_end()) {
1223 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1224 thread->set_privileged_stack_top(&pi);
1225 }
1226
1227
1228 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1229 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1230 Handle pending_exception;
1231 JavaValue result(T_OBJECT);
1232 JavaCallArguments args(object);
1233 JavaCalls::call(&result, m, &args, THREAD);
1234
1235 // done with action, remove ourselves from the list
1236 if (!vfst.at_end()) {
1237 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1238 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1239 }
1240
1241 if (HAS_PENDING_EXCEPTION) {
1242 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1243 CLEAR_PENDING_EXCEPTION;
1244
1245 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1246 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1247 // Throw a java.security.PrivilegedActionException(Exception e) exception
1248 JavaCallArguments args(pending_exception);
1249 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1250 vmSymbols::exception_void_signature(),
1251 &args);
1252 }
1253 }
1254
1255 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1256 return JNIHandles::make_local(env, (oop) result.get_jobject());
1257 JVM_END
1258
1259
1260 // Returns the inherited_access_control_context field of the running thread.
1261 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1262 JVMWrapper("JVM_GetInheritedAccessControlContext");
1263 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1264 return JNIHandles::make_local(env, result);
1265 JVM_END
1266
1267 class RegisterArrayForGC {
1268 private:
1269 JavaThread *_thread;
1270 public:
1271 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1272 _thread = thread;
1273 _thread->register_array_for_gc(array);
1274 }
1275
1276 ~RegisterArrayForGC() {
1277 _thread->register_array_for_gc(NULL);
1278 }
1279 };
1280
1281
1282 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1283 JVMWrapper("JVM_GetStackAccessControlContext");
1284 if (!UsePrivilegedStack) return NULL;
1285
1286 ResourceMark rm(THREAD);
1287 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1288 JvmtiVMObjectAllocEventCollector oam;
1289
1290 // count the protection domains on the execution stack. We collapse
1291 // duplicate consecutive protection domains into a single one, as
1292 // well as stopping when we hit a privileged frame.
1293
1294 // Use vframeStream to iterate through Java frames
1295 vframeStream vfst(thread);
1296
1297 oop previous_protection_domain = NULL;
1298 Handle privileged_context(thread, NULL);
1299 bool is_privileged = false;
1300 oop protection_domain = NULL;
1301
1302 for(; !vfst.at_end(); vfst.next()) {
1303 // get method of frame
1304 Method* method = vfst.method();
1305 intptr_t* frame_id = vfst.frame_id();
1306
1307 // check the privileged frames to see if we have a match
1308 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1309 // this frame is privileged
1310 is_privileged = true;
1311 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1312 protection_domain = thread->privileged_stack_top()->protection_domain();
1313 } else {
1314 protection_domain = method->method_holder()->protection_domain();
1315 }
1316
1317 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1318 local_array->push(protection_domain);
1319 previous_protection_domain = protection_domain;
1320 }
1321
1322 if (is_privileged) break;
1323 }
1324
1325
1326 // either all the domains on the stack were system domains, or
1327 // we had a privileged system domain
1328 if (local_array->is_empty()) {
1329 if (is_privileged && privileged_context.is_null()) return NULL;
1330
1331 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1332 return JNIHandles::make_local(env, result);
1333 }
1334
1335 // the resource area must be registered in case of a gc
1336 RegisterArrayForGC ragc(thread, local_array);
1337 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1338 local_array->length(), CHECK_NULL);
1339 objArrayHandle h_context(thread, context);
1340 for (int index = 0; index < local_array->length(); index++) {
1341 h_context->obj_at_put(index, local_array->at(index));
1342 }
1343
1344 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1345
1346 return JNIHandles::make_local(env, result);
1347 JVM_END
1348
1349
1350 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1351 JVMWrapper("JVM_IsArrayClass");
1352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1353 return (k != NULL) && k->oop_is_array() ? true : false;
1354 JVM_END
1355
1356
1357 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1358 JVMWrapper("JVM_IsPrimitiveClass");
1359 oop mirror = JNIHandles::resolve_non_null(cls);
1360 return (jboolean) java_lang_Class::is_primitive(mirror);
1361 JVM_END
1362
1363
1364 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1365 JVMWrapper("JVM_GetComponentType");
1366 oop mirror = JNIHandles::resolve_non_null(cls);
1367 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1368 return (jclass) JNIHandles::make_local(env, result);
1369 JVM_END
1370
1371
1372 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1373 JVMWrapper("JVM_GetClassModifiers");
1374 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1375 // Primitive type
1376 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1377 }
1378
1379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1380 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1381 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1382 return k->modifier_flags();
1383 JVM_END
1384
1385
1386 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1387
1388 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1389 JvmtiVMObjectAllocEventCollector oam;
1390 // ofClass is a reference to a java_lang_Class object. The mirror object
1391 // of an InstanceKlass
1392
1393 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1394 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1395 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1396 return (jobjectArray)JNIHandles::make_local(env, result);
1397 }
1398
1399 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1400 InnerClassesIterator iter(k);
1401
1402 if (iter.length() == 0) {
1403 // Neither an inner nor outer class
1404 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1405 return (jobjectArray)JNIHandles::make_local(env, result);
1406 }
1407
1408 // find inner class info
1409 constantPoolHandle cp(thread, k->constants());
1410 int length = iter.length();
1411
1412 // Allocate temp. result array
1413 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1414 objArrayHandle result (THREAD, r);
1415 int members = 0;
1416
1417 for (; !iter.done(); iter.next()) {
1418 int ioff = iter.inner_class_info_index();
1419 int ooff = iter.outer_class_info_index();
1420
1421 if (ioff != 0 && ooff != 0) {
1422 // Check to see if the name matches the class we're looking for
1423 // before attempting to find the class.
1424 if (cp->klass_name_at_matches(k, ooff)) {
1425 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1426 if (outer_klass == k()) {
1427 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1428 instanceKlassHandle inner_klass (THREAD, ik);
1429
1430 // Throws an exception if outer klass has not declared k as
1431 // an inner klass
1432 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1433
1434 result->obj_at_put(members, inner_klass->java_mirror());
1435 members++;
1436 }
1437 }
1438 }
1439 }
1440
1441 if (members != length) {
1442 // Return array of right length
1443 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1444 for(int i = 0; i < members; i++) {
1445 res->obj_at_put(i, result->obj_at(i));
1446 }
1447 return (jobjectArray)JNIHandles::make_local(env, res);
1448 }
1449
1450 return (jobjectArray)JNIHandles::make_local(env, result());
1451 JVM_END
1452
1453
1454 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1455 {
1456 // ofClass is a reference to a java_lang_Class object.
1457 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1458 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1459 return NULL;
1460 }
1461
1462 bool inner_is_member = false;
1463 Klass* outer_klass
1464 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1465 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1466 if (outer_klass == NULL) return NULL; // already a top-level class
1467 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1468 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1469 }
1470 JVM_END
1471
1472 // should be in InstanceKlass.cpp, but is here for historical reasons
1473 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1474 bool* inner_is_member,
1475 TRAPS) {
1476 Thread* thread = THREAD;
1477 InnerClassesIterator iter(k);
1478 if (iter.length() == 0) {
1479 // No inner class info => no declaring class
1480 return NULL;
1481 }
1482
1483 constantPoolHandle i_cp(thread, k->constants());
1484
1485 bool found = false;
1486 Klass* ok;
1487 instanceKlassHandle outer_klass;
1488 *inner_is_member = false;
1489
1490 // Find inner_klass attribute
1491 for (; !iter.done() && !found; iter.next()) {
1492 int ioff = iter.inner_class_info_index();
1493 int ooff = iter.outer_class_info_index();
1494 int noff = iter.inner_name_index();
1495 if (ioff != 0) {
1496 // Check to see if the name matches the class we're looking for
1497 // before attempting to find the class.
1498 if (i_cp->klass_name_at_matches(k, ioff)) {
1499 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1500 found = (k() == inner_klass);
1501 if (found && ooff != 0) {
1502 ok = i_cp->klass_at(ooff, CHECK_NULL);
1503 outer_klass = instanceKlassHandle(thread, ok);
1504 *inner_is_member = true;
1505 }
1506 }
1507 }
1508 }
1509
1510 if (found && outer_klass.is_null()) {
1511 // It may be anonymous; try for that.
1512 int encl_method_class_idx = k->enclosing_method_class_index();
1513 if (encl_method_class_idx != 0) {
1514 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1515 outer_klass = instanceKlassHandle(thread, ok);
1516 *inner_is_member = false;
1517 }
1518 }
1519
1520 // If no inner class attribute found for this class.
1521 if (outer_klass.is_null()) return NULL;
1522
1523 // Throws an exception if outer klass has not declared k as an inner klass
1524 // We need evidence that each klass knows about the other, or else
1525 // the system could allow a spoof of an inner class to gain access rights.
1526 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1527 return outer_klass();
1528 }
1529
1530 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1531 assert (cls != NULL, "illegal class");
1532 JVMWrapper("JVM_GetClassSignature");
1533 JvmtiVMObjectAllocEventCollector oam;
1534 ResourceMark rm(THREAD);
1535 // Return null for arrays and primatives
1536 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1537 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1538 if (k->oop_is_instance()) {
1539 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1540 if (sym == NULL) return NULL;
1541 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1542 return (jstring) JNIHandles::make_local(env, str());
1543 }
1544 }
1545 return NULL;
1546 JVM_END
1547
1548
1549 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1550 assert (cls != NULL, "illegal class");
1551 JVMWrapper("JVM_GetClassAnnotations");
1552
1553 // Return null for arrays and primitives
1554 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1555 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1556 if (k->oop_is_instance()) {
1557 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1558 return (jbyteArray) JNIHandles::make_local(env, a);
1559 }
1560 }
1561 return NULL;
1562 JVM_END
1563
1564
1565 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1566 // some of this code was adapted from from jni_FromReflectedField
1567
1568 oop reflected = JNIHandles::resolve_non_null(field);
1569 oop mirror = java_lang_reflect_Field::clazz(reflected);
1570 Klass* k = java_lang_Class::as_Klass(mirror);
1571 int slot = java_lang_reflect_Field::slot(reflected);
1572 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1573
1574 KlassHandle kh(THREAD, k);
1575 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1576
1577 if (modifiers & JVM_ACC_STATIC) {
1578 // for static fields we only look in the current class
1579 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1580 assert(false, "cannot find static field");
1581 return false;
1582 }
1583 } else {
1584 // for instance fields we start with the current class and work
1585 // our way up through the superclass chain
1586 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1587 assert(false, "cannot find instance field");
1588 return false;
1589 }
1590 }
1591 return true;
1592 }
1593
1594 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1595 // field is a handle to a java.lang.reflect.Field object
1596 assert(field != NULL, "illegal field");
1597 JVMWrapper("JVM_GetFieldAnnotations");
1598
1599 fieldDescriptor fd;
1600 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1601 if (!gotFd) {
1602 return NULL;
1603 }
1604
1605 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1606 JVM_END
1607
1608
1609 static Method* jvm_get_method_common(jobject method) {
1610 // some of this code was adapted from from jni_FromReflectedMethod
1611
1612 oop reflected = JNIHandles::resolve_non_null(method);
1613 oop mirror = NULL;
1614 int slot = 0;
1615
1616 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1617 mirror = java_lang_reflect_Constructor::clazz(reflected);
1618 slot = java_lang_reflect_Constructor::slot(reflected);
1619 } else {
1620 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1621 "wrong type");
1622 mirror = java_lang_reflect_Method::clazz(reflected);
1623 slot = java_lang_reflect_Method::slot(reflected);
1624 }
1625 Klass* k = java_lang_Class::as_Klass(mirror);
1626
1627 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1628 assert(m != NULL, "cannot find method");
1629 return m; // caller has to deal with NULL in product mode
1630 }
1631
1632
1633 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1634 JVMWrapper("JVM_GetMethodAnnotations");
1635
1636 // method is a handle to a java.lang.reflect.Method object
1637 Method* m = jvm_get_method_common(method);
1638 if (m == NULL) {
1639 return NULL;
1640 }
1641
1642 return (jbyteArray) JNIHandles::make_local(env,
1643 Annotations::make_java_array(m->annotations(), THREAD));
1644 JVM_END
1645
1646
1647 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1648 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1649
1650 // method is a handle to a java.lang.reflect.Method object
1651 Method* m = jvm_get_method_common(method);
1652 if (m == NULL) {
1653 return NULL;
1654 }
1655
1656 return (jbyteArray) JNIHandles::make_local(env,
1657 Annotations::make_java_array(m->annotation_default(), THREAD));
1658 JVM_END
1659
1660
1661 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1662 JVMWrapper("JVM_GetMethodParameterAnnotations");
1663
1664 // method is a handle to a java.lang.reflect.Method object
1665 Method* m = jvm_get_method_common(method);
1666 if (m == NULL) {
1667 return NULL;
1668 }
1669
1670 return (jbyteArray) JNIHandles::make_local(env,
1671 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1672 JVM_END
1673
1674 /* Type use annotations support (JDK 1.8) */
1675
1676 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1677 assert (cls != NULL, "illegal class");
1678 JVMWrapper("JVM_GetClassTypeAnnotations");
1679 ResourceMark rm(THREAD);
1680 // Return null for arrays and primitives
1681 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1682 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1683 if (k->oop_is_instance()) {
1684 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1685 if (type_annotations != NULL) {
1686 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1687 return (jbyteArray) JNIHandles::make_local(env, a);
1688 }
1689 }
1690 }
1691 return NULL;
1692 JVM_END
1693
1694 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1695 assert (method != NULL, "illegal method");
1696 JVMWrapper("JVM_GetMethodTypeAnnotations");
1697
1698 // method is a handle to a java.lang.reflect.Method object
1699 Method* m = jvm_get_method_common(method);
1700 if (m == NULL) {
1701 return NULL;
1702 }
1703
1704 AnnotationArray* type_annotations = m->type_annotations();
1705 if (type_annotations != NULL) {
1706 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1707 return (jbyteArray) JNIHandles::make_local(env, a);
1708 }
1709
1710 return NULL;
1711 JVM_END
1712
1713 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1714 assert (field != NULL, "illegal field");
1715 JVMWrapper("JVM_GetFieldTypeAnnotations");
1716
1717 fieldDescriptor fd;
1718 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1719 if (!gotFd) {
1720 return NULL;
1721 }
1722
1723 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1724 JVM_END
1725
1726 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1727 if (!cp->is_within_bounds(index)) {
1728 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1729 }
1730 }
1731
1732 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1733 {
1734 JVMWrapper("JVM_GetMethodParameters");
1735 // method is a handle to a java.lang.reflect.Method object
1736 Method* method_ptr = jvm_get_method_common(method);
1737 methodHandle mh (THREAD, method_ptr);
1738 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1739 const int num_params = mh->method_parameters_length();
1740
1741 if (0 != num_params) {
1742 // make sure all the symbols are properly formatted
1743 for (int i = 0; i < num_params; i++) {
1744 MethodParametersElement* params = mh->method_parameters_start();
1745 int index = params[i].name_cp_index;
1746 bounds_check(mh->constants(), index, CHECK_NULL);
1747
1748 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1749 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1750 "Wrong type at constant pool index");
1751 }
1752
1753 }
1754
1755 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1756 objArrayHandle result (THREAD, result_oop);
1757
1758 for (int i = 0; i < num_params; i++) {
1759 MethodParametersElement* params = mh->method_parameters_start();
1760 // For a 0 index, give a NULL symbol
1761 Symbol* sym = 0 != params[i].name_cp_index ?
1762 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1763 int flags = params[i].flags;
1764 oop param = Reflection::new_parameter(reflected_method, i, sym,
1765 flags, CHECK_NULL);
1766 result->obj_at_put(i, param);
1767 }
1768 return (jobjectArray)JNIHandles::make_local(env, result());
1769 } else {
1770 return (jobjectArray)NULL;
1771 }
1772 }
1773 JVM_END
1774
1775 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1776
1777 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1778 {
1779 JVMWrapper("JVM_GetClassDeclaredFields");
1780 JvmtiVMObjectAllocEventCollector oam;
1781
1782 // Exclude primitive types and array types
1783 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1784 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1785 // Return empty array
1786 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1787 return (jobjectArray) JNIHandles::make_local(env, res);
1788 }
1789
1790 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1791 constantPoolHandle cp(THREAD, k->constants());
1792
1793 // Ensure class is linked
1794 k->link_class(CHECK_NULL);
1795
1796 // 4496456 We need to filter out java.lang.Throwable.backtrace
1797 bool skip_backtrace = false;
1798
1799 // Allocate result
1800 int num_fields;
1801
1802 if (publicOnly) {
1803 num_fields = 0;
1804 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1805 if (fs.access_flags().is_public()) ++num_fields;
1806 }
1807 } else {
1808 num_fields = k->java_fields_count();
1809
1810 if (k() == SystemDictionary::Throwable_klass()) {
1811 num_fields--;
1812 skip_backtrace = true;
1813 }
1814 }
1815
1816 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1817 objArrayHandle result (THREAD, r);
1818
1819 int out_idx = 0;
1820 fieldDescriptor fd;
1821 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1822 if (skip_backtrace) {
1823 // 4496456 skip java.lang.Throwable.backtrace
1824 int offset = fs.offset();
1825 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1826 }
1827
1828 if (!publicOnly || fs.access_flags().is_public()) {
1829 fd.reinitialize(k(), fs.index());
1830 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1831 result->obj_at_put(out_idx, field);
1832 ++out_idx;
1833 }
1834 }
1835 assert(out_idx == num_fields, "just checking");
1836 return (jobjectArray) JNIHandles::make_local(env, result());
1837 }
1838 JVM_END
1839
1840 static bool select_method(methodHandle method, bool want_constructor) {
1841 if (want_constructor) {
1842 return (method->is_initializer() && !method->is_static());
1843 } else {
1844 return (!method->is_initializer() && !method->is_overpass());
1845 }
1846 }
1847
1848 static jobjectArray get_class_declared_methods_helper(
1849 JNIEnv *env,
1850 jclass ofClass, jboolean publicOnly,
1851 bool want_constructor,
1852 Klass* klass, TRAPS) {
1853
1854 JvmtiVMObjectAllocEventCollector oam;
1855
1856 // Exclude primitive types and array types
1857 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1858 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1859 // Return empty array
1860 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1861 return (jobjectArray) JNIHandles::make_local(env, res);
1862 }
1863
1864 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1865
1866 // Ensure class is linked
1867 k->link_class(CHECK_NULL);
1868
1869 Array<Method*>* methods = k->methods();
1870 int methods_length = methods->length();
1871
1872 // Save original method_idnum in case of redefinition, which can change
1873 // the idnum of obsolete methods. The new method will have the same idnum
1874 // but if we refresh the methods array, the counts will be wrong.
1875 ResourceMark rm(THREAD);
1876 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1877 int num_methods = 0;
1878
1879 for (int i = 0; i < methods_length; i++) {
1880 methodHandle method(THREAD, methods->at(i));
1881 if (select_method(method, want_constructor)) {
1882 if (!publicOnly || method->is_public()) {
1883 idnums->push(method->method_idnum());
1884 ++num_methods;
1885 }
1886 }
1887 }
1888
1889 // Allocate result
1890 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1891 objArrayHandle result (THREAD, r);
1892
1893 // Now just put the methods that we selected above, but go by their idnum
1894 // in case of redefinition. The methods can be redefined at any safepoint,
1895 // so above when allocating the oop array and below when creating reflect
1896 // objects.
1897 for (int i = 0; i < num_methods; i++) {
1898 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1899 if (method.is_null()) {
1900 // Method may have been deleted and seems this API can handle null
1901 // Otherwise should probably put a method that throws NSME
1902 result->obj_at_put(i, NULL);
1903 } else {
1904 oop m;
1905 if (want_constructor) {
1906 m = Reflection::new_constructor(method, CHECK_NULL);
1907 } else {
1908 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1909 }
1910 result->obj_at_put(i, m);
1911 }
1912 }
1913
1914 return (jobjectArray) JNIHandles::make_local(env, result());
1915 }
1916
1917 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1918 {
1919 JVMWrapper("JVM_GetClassDeclaredMethods");
1920 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1921 /*want_constructor*/ false,
1922 SystemDictionary::reflect_Method_klass(), THREAD);
1923 }
1924 JVM_END
1925
1926 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1927 {
1928 JVMWrapper("JVM_GetClassDeclaredConstructors");
1929 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1930 /*want_constructor*/ true,
1931 SystemDictionary::reflect_Constructor_klass(), THREAD);
1932 }
1933 JVM_END
1934
1935 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1936 {
1937 JVMWrapper("JVM_GetClassAccessFlags");
1938 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1939 // Primitive type
1940 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1941 }
1942
1943 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1944 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1945 }
1946 JVM_END
1947
1948
1949 // Constant pool access //////////////////////////////////////////////////////////
1950
1951 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1952 {
1953 JVMWrapper("JVM_GetClassConstantPool");
1954 JvmtiVMObjectAllocEventCollector oam;
1955
1956 // Return null for primitives and arrays
1957 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1958 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1959 if (k->oop_is_instance()) {
1960 instanceKlassHandle k_h(THREAD, k);
1961 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1962 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1963 return JNIHandles::make_local(jcp());
1964 }
1965 }
1966 return NULL;
1967 }
1968 JVM_END
1969
1970
1971 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1972 {
1973 JVMWrapper("JVM_ConstantPoolGetSize");
1974 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1975 return cp->length();
1976 }
1977 JVM_END
1978
1979
1980 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1981 {
1982 JVMWrapper("JVM_ConstantPoolGetClassAt");
1983 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1984 bounds_check(cp, index, CHECK_NULL);
1985 constantTag tag = cp->tag_at(index);
1986 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1987 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1988 }
1989 Klass* k = cp->klass_at(index, CHECK_NULL);
1990 return (jclass) JNIHandles::make_local(k->java_mirror());
1991 }
1992 JVM_END
1993
1994 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1995 {
1996 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1997 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1998 bounds_check(cp, index, CHECK_NULL);
1999 constantTag tag = cp->tag_at(index);
2000 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2002 }
2003 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2004 if (k == NULL) return NULL;
2005 return (jclass) JNIHandles::make_local(k->java_mirror());
2006 }
2007 JVM_END
2008
2009 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2010 constantTag tag = cp->tag_at(index);
2011 if (!tag.is_method() && !tag.is_interface_method()) {
2012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2013 }
2014 int klass_ref = cp->uncached_klass_ref_index_at(index);
2015 Klass* k_o;
2016 if (force_resolution) {
2017 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2018 } else {
2019 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2020 if (k_o == NULL) return NULL;
2021 }
2022 instanceKlassHandle k(THREAD, k_o);
2023 Symbol* name = cp->uncached_name_ref_at(index);
2024 Symbol* sig = cp->uncached_signature_ref_at(index);
2025 methodHandle m (THREAD, k->find_method(name, sig));
2026 if (m.is_null()) {
2027 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2028 }
2029 oop method;
2030 if (!m->is_initializer() || m->is_static()) {
2031 method = Reflection::new_method(m, true, true, CHECK_NULL);
2032 } else {
2033 method = Reflection::new_constructor(m, CHECK_NULL);
2034 }
2035 return JNIHandles::make_local(method);
2036 }
2037
2038 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2039 {
2040 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2041 JvmtiVMObjectAllocEventCollector oam;
2042 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2043 bounds_check(cp, index, CHECK_NULL);
2044 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2045 return res;
2046 }
2047 JVM_END
2048
2049 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2050 {
2051 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2052 JvmtiVMObjectAllocEventCollector oam;
2053 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2054 bounds_check(cp, index, CHECK_NULL);
2055 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2056 return res;
2057 }
2058 JVM_END
2059
2060 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2061 constantTag tag = cp->tag_at(index);
2062 if (!tag.is_field()) {
2063 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2064 }
2065 int klass_ref = cp->uncached_klass_ref_index_at(index);
2066 Klass* k_o;
2067 if (force_resolution) {
2068 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2069 } else {
2070 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2071 if (k_o == NULL) return NULL;
2072 }
2073 instanceKlassHandle k(THREAD, k_o);
2074 Symbol* name = cp->uncached_name_ref_at(index);
2075 Symbol* sig = cp->uncached_signature_ref_at(index);
2076 fieldDescriptor fd;
2077 Klass* target_klass = k->find_field(name, sig, &fd);
2078 if (target_klass == NULL) {
2079 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2080 }
2081 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2082 return JNIHandles::make_local(field);
2083 }
2084
2085 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2086 {
2087 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2088 JvmtiVMObjectAllocEventCollector oam;
2089 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2090 bounds_check(cp, index, CHECK_NULL);
2091 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2092 return res;
2093 }
2094 JVM_END
2095
2096 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2097 {
2098 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2099 JvmtiVMObjectAllocEventCollector oam;
2100 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2101 bounds_check(cp, index, CHECK_NULL);
2102 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2103 return res;
2104 }
2105 JVM_END
2106
2107 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2108 {
2109 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2110 JvmtiVMObjectAllocEventCollector oam;
2111 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2112 bounds_check(cp, index, CHECK_NULL);
2113 constantTag tag = cp->tag_at(index);
2114 if (!tag.is_field_or_method()) {
2115 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2116 }
2117 int klass_ref = cp->uncached_klass_ref_index_at(index);
2118 Symbol* klass_name = cp->klass_name_at(klass_ref);
2119 Symbol* member_name = cp->uncached_name_ref_at(index);
2120 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2121 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2122 objArrayHandle dest(THREAD, dest_o);
2123 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2124 dest->obj_at_put(0, str());
2125 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2126 dest->obj_at_put(1, str());
2127 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2128 dest->obj_at_put(2, str());
2129 return (jobjectArray) JNIHandles::make_local(dest());
2130 }
2131 JVM_END
2132
2133 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetIntAt");
2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_0);
2138 constantTag tag = cp->tag_at(index);
2139 if (!tag.is_int()) {
2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2141 }
2142 return cp->int_at(index);
2143 }
2144 JVM_END
2145
2146 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2147 {
2148 JVMWrapper("JVM_ConstantPoolGetLongAt");
2149 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2150 bounds_check(cp, index, CHECK_(0L));
2151 constantTag tag = cp->tag_at(index);
2152 if (!tag.is_long()) {
2153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2154 }
2155 return cp->long_at(index);
2156 }
2157 JVM_END
2158
2159 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2160 {
2161 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2162 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 bounds_check(cp, index, CHECK_(0.0f));
2164 constantTag tag = cp->tag_at(index);
2165 if (!tag.is_float()) {
2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167 }
2168 return cp->float_at(index);
2169 }
2170 JVM_END
2171
2172 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2173 {
2174 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2175 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2176 bounds_check(cp, index, CHECK_(0.0));
2177 constantTag tag = cp->tag_at(index);
2178 if (!tag.is_double()) {
2179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2180 }
2181 return cp->double_at(index);
2182 }
2183 JVM_END
2184
2185 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2186 {
2187 JVMWrapper("JVM_ConstantPoolGetStringAt");
2188 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_NULL);
2190 constantTag tag = cp->tag_at(index);
2191 if (!tag.is_string()) {
2192 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2193 }
2194 oop str = cp->string_at(index, CHECK_NULL);
2195 return (jstring) JNIHandles::make_local(str);
2196 }
2197 JVM_END
2198
2199 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2200 {
2201 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2202 JvmtiVMObjectAllocEventCollector oam;
2203 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2204 bounds_check(cp, index, CHECK_NULL);
2205 constantTag tag = cp->tag_at(index);
2206 if (!tag.is_symbol()) {
2207 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2208 }
2209 Symbol* sym = cp->symbol_at(index);
2210 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2211 return (jstring) JNIHandles::make_local(str());
2212 }
2213 JVM_END
2214
2215
2216 // Assertion support. //////////////////////////////////////////////////////////
2217
2218 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2219 JVMWrapper("JVM_DesiredAssertionStatus");
2220 assert(cls != NULL, "bad class");
2221
2222 oop r = JNIHandles::resolve(cls);
2223 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2224 if (java_lang_Class::is_primitive(r)) return false;
2225
2226 Klass* k = java_lang_Class::as_Klass(r);
2227 assert(k->oop_is_instance(), "must be an instance klass");
2228 if (! k->oop_is_instance()) return false;
2229
2230 ResourceMark rm(THREAD);
2231 const char* name = k->name()->as_C_string();
2232 bool system_class = k->class_loader() == NULL;
2233 return JavaAssertions::enabled(name, system_class);
2234
2235 JVM_END
2236
2237
2238 // Return a new AssertionStatusDirectives object with the fields filled in with
2239 // command-line assertion arguments (i.e., -ea, -da).
2240 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2241 JVMWrapper("JVM_AssertionStatusDirectives");
2242 JvmtiVMObjectAllocEventCollector oam;
2243 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2244 return JNIHandles::make_local(env, asd);
2245 JVM_END
2246
2247 // Verification ////////////////////////////////////////////////////////////////////////////////
2248
2249 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2250
2251 // RedefineClasses support: bug 6214132 caused verification to fail.
2252 // All functions from this section should call the jvmtiThreadSate function:
2253 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2254 // The function returns a Klass* of the _scratch_class if the verifier
2255 // was invoked in the middle of the class redefinition.
2256 // Otherwise it returns its argument value which is the _the_class Klass*.
2257 // Please, refer to the description in the jvmtiThreadSate.hpp.
2258
2259 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2260 JVMWrapper("JVM_GetClassNameUTF");
2261 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2262 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2263 return k->name()->as_utf8();
2264 JVM_END
2265
2266
2267 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2268 JVMWrapper("JVM_GetClassCPTypes");
2269 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2270 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2271 // types will have length zero if this is not an InstanceKlass
2272 // (length is determined by call to JVM_GetClassCPEntriesCount)
2273 if (k->oop_is_instance()) {
2274 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2275 for (int index = cp->length() - 1; index >= 0; index--) {
2276 constantTag tag = cp->tag_at(index);
2277 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2278 }
2279 }
2280 JVM_END
2281
2282
2283 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2284 JVMWrapper("JVM_GetClassCPEntriesCount");
2285 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287 if (!k->oop_is_instance())
2288 return 0;
2289 return InstanceKlass::cast(k)->constants()->length();
2290 JVM_END
2291
2292
2293 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2294 JVMWrapper("JVM_GetClassFieldsCount");
2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2297 if (!k->oop_is_instance())
2298 return 0;
2299 return InstanceKlass::cast(k)->java_fields_count();
2300 JVM_END
2301
2302
2303 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2304 JVMWrapper("JVM_GetClassMethodsCount");
2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 if (!k->oop_is_instance())
2308 return 0;
2309 return InstanceKlass::cast(k)->methods()->length();
2310 JVM_END
2311
2312
2313 // The following methods, used for the verifier, are never called with
2314 // array klasses, so a direct cast to InstanceKlass is safe.
2315 // Typically, these methods are called in a loop with bounds determined
2316 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2317 // zero for arrays.
2318 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2319 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2320 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2323 int length = method->checked_exceptions_length();
2324 if (length > 0) {
2325 CheckedExceptionElement* table= method->checked_exceptions_start();
2326 for (int i = 0; i < length; i++) {
2327 exceptions[i] = table[i].class_cp_index;
2328 }
2329 }
2330 JVM_END
2331
2332
2333 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2334 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2338 return method->checked_exceptions_length();
2339 JVM_END
2340
2341
2342 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2343 JVMWrapper("JVM_GetMethodIxByteCode");
2344 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2345 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2346 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2347 memcpy(code, method->code_base(), method->code_size());
2348 JVM_END
2349
2350
2351 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2352 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2354 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2355 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2356 return method->code_size();
2357 JVM_END
2358
2359
2360 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2361 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2365 ExceptionTable extable(method);
2366 entry->start_pc = extable.start_pc(entry_index);
2367 entry->end_pc = extable.end_pc(entry_index);
2368 entry->handler_pc = extable.handler_pc(entry_index);
2369 entry->catchType = extable.catch_type_index(entry_index);
2370 JVM_END
2371
2372
2373 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2374 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2375 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2376 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2377 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2378 return method->exception_table_length();
2379 JVM_END
2380
2381
2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2383 JVMWrapper("JVM_GetMethodIxModifiers");
2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2387 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2388 JVM_END
2389
2390
2391 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2392 JVMWrapper("JVM_GetFieldIxModifiers");
2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2395 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2396 JVM_END
2397
2398
2399 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2400 JVMWrapper("JVM_GetMethodIxLocalsCount");
2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2404 return method->max_locals();
2405 JVM_END
2406
2407
2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2409 JVMWrapper("JVM_GetMethodIxArgsSize");
2410 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2413 return method->size_of_parameters();
2414 JVM_END
2415
2416
2417 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2418 JVMWrapper("JVM_GetMethodIxMaxStack");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2422 return method->verifier_max_stack();
2423 JVM_END
2424
2425
2426 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2427 JVMWrapper("JVM_IsConstructorIx");
2428 ResourceMark rm(THREAD);
2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2432 return method->name() == vmSymbols::object_initializer_name();
2433 JVM_END
2434
2435
2436 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2437 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2438 ResourceMark rm(THREAD);
2439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2441 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2442 return method->is_overpass();
2443 JVM_END
2444
2445 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2446 JVMWrapper("JVM_GetMethodIxIxUTF");
2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2450 return method->name()->as_utf8();
2451 JVM_END
2452
2453
2454 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2455 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2459 return method->signature()->as_utf8();
2460 JVM_END
2461
2462 /**
2463 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2464 * read entries in the constant pool. Since the old verifier always
2465 * works on a copy of the code, it will not see any rewriting that
2466 * may possibly occur in the middle of verification. So it is important
2467 * that nothing it calls tries to use the cpCache instead of the raw
2468 * constant pool, so we must use cp->uncached_x methods when appropriate.
2469 */
2470 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2471 JVMWrapper("JVM_GetCPFieldNameUTF");
2472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2473 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2474 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2475 switch (cp->tag_at(cp_index).value()) {
2476 case JVM_CONSTANT_Fieldref:
2477 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2478 default:
2479 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2480 }
2481 ShouldNotReachHere();
2482 return NULL;
2483 JVM_END
2484
2485
2486 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2487 JVMWrapper("JVM_GetCPMethodNameUTF");
2488 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2489 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2490 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2491 switch (cp->tag_at(cp_index).value()) {
2492 case JVM_CONSTANT_InterfaceMethodref:
2493 case JVM_CONSTANT_Methodref:
2494 case JVM_CONSTANT_NameAndType: // for invokedynamic
2495 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2496 default:
2497 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2498 }
2499 ShouldNotReachHere();
2500 return NULL;
2501 JVM_END
2502
2503
2504 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2505 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2508 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2509 switch (cp->tag_at(cp_index).value()) {
2510 case JVM_CONSTANT_InterfaceMethodref:
2511 case JVM_CONSTANT_Methodref:
2512 case JVM_CONSTANT_NameAndType: // for invokedynamic
2513 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2514 default:
2515 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2516 }
2517 ShouldNotReachHere();
2518 return NULL;
2519 JVM_END
2520
2521
2522 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2523 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2527 switch (cp->tag_at(cp_index).value()) {
2528 case JVM_CONSTANT_Fieldref:
2529 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2530 default:
2531 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2532 }
2533 ShouldNotReachHere();
2534 return NULL;
2535 JVM_END
2536
2537
2538 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2539 JVMWrapper("JVM_GetCPClassNameUTF");
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 Symbol* classname = cp->klass_name_at(cp_index);
2544 return classname->as_utf8();
2545 JVM_END
2546
2547
2548 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2549 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2552 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2553 switch (cp->tag_at(cp_index).value()) {
2554 case JVM_CONSTANT_Fieldref: {
2555 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2556 Symbol* classname = cp->klass_name_at(class_index);
2557 return classname->as_utf8();
2558 }
2559 default:
2560 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2561 }
2562 ShouldNotReachHere();
2563 return NULL;
2564 JVM_END
2565
2566
2567 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2568 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2569 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2570 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2571 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2572 switch (cp->tag_at(cp_index).value()) {
2573 case JVM_CONSTANT_Methodref:
2574 case JVM_CONSTANT_InterfaceMethodref: {
2575 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2576 Symbol* classname = cp->klass_name_at(class_index);
2577 return classname->as_utf8();
2578 }
2579 default:
2580 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2581 }
2582 ShouldNotReachHere();
2583 return NULL;
2584 JVM_END
2585
2586
2587 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2588 JVMWrapper("JVM_GetCPFieldModifiers");
2589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2590 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2591 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2592 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2593 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2594 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2595 switch (cp->tag_at(cp_index).value()) {
2596 case JVM_CONSTANT_Fieldref: {
2597 Symbol* name = cp->uncached_name_ref_at(cp_index);
2598 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2599 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2600 if (fs.name() == name && fs.signature() == signature) {
2601 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2602 }
2603 }
2604 return -1;
2605 }
2606 default:
2607 fatal("JVM_GetCPFieldModifiers: illegal constant");
2608 }
2609 ShouldNotReachHere();
2610 return 0;
2611 JVM_END
2612
2613
2614 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2615 JVMWrapper("JVM_GetCPMethodModifiers");
2616 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2617 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2619 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2620 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2621 switch (cp->tag_at(cp_index).value()) {
2622 case JVM_CONSTANT_Methodref:
2623 case JVM_CONSTANT_InterfaceMethodref: {
2624 Symbol* name = cp->uncached_name_ref_at(cp_index);
2625 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2626 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2627 int methods_count = methods->length();
2628 for (int i = 0; i < methods_count; i++) {
2629 Method* method = methods->at(i);
2630 if (method->name() == name && method->signature() == signature) {
2631 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2632 }
2633 }
2634 return -1;
2635 }
2636 default:
2637 fatal("JVM_GetCPMethodModifiers: illegal constant");
2638 }
2639 ShouldNotReachHere();
2640 return 0;
2641 JVM_END
2642
2643
2644 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2645
2646 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2647 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2648 JVM_END
2649
2650
2651 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2652 JVMWrapper("JVM_IsSameClassPackage");
2653 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2654 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2655 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2656 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2657 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2658 JVM_END
2659
2660
2661 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2662
2663 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2664 JVMWrapper2("JVM_Open (%s)", fname);
2665
2666 //%note jvm_r6
2667 int result = os::open(fname, flags, mode);
2668 if (result >= 0) {
2669 return result;
2670 } else {
2671 switch(errno) {
2672 case EEXIST:
2673 return JVM_EEXIST;
2674 default:
2675 return -1;
2676 }
2677 }
2678 JVM_END
2679
2680
2681 JVM_LEAF(jint, JVM_Close(jint fd))
2682 JVMWrapper2("JVM_Close (0x%x)", fd);
2683 //%note jvm_r6
2684 return os::close(fd);
2685 JVM_END
2686
2687
2688 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2689 JVMWrapper2("JVM_Read (0x%x)", fd);
2690
2691 //%note jvm_r6
2692 return (jint)os::restartable_read(fd, buf, nbytes);
2693 JVM_END
2694
2695
2696 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2697 JVMWrapper2("JVM_Write (0x%x)", fd);
2698
2699 //%note jvm_r6
2700 return (jint)os::write(fd, buf, nbytes);
2701 JVM_END
2702
2703
2704 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2705 JVMWrapper2("JVM_Available (0x%x)", fd);
2706 //%note jvm_r6
2707 return os::available(fd, pbytes);
2708 JVM_END
2709
2710
2711 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2712 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2713 //%note jvm_r6
2714 return os::lseek(fd, offset, whence);
2715 JVM_END
2716
2717
2718 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2719 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2720 return os::ftruncate(fd, length);
2721 JVM_END
2722
2723
2724 JVM_LEAF(jint, JVM_Sync(jint fd))
2725 JVMWrapper2("JVM_Sync (0x%x)", fd);
2726 //%note jvm_r6
2727 return os::fsync(fd);
2728 JVM_END
2729
2730
2731 // Printing support //////////////////////////////////////////////////
2732 extern "C" {
2733
2734 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2735 // see bug 4399518, 4417214
2736 if ((intptr_t)count <= 0) return -1;
2737 return vsnprintf(str, count, fmt, args);
2738 }
2739
2740
2741 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2742 va_list args;
2743 int len;
2744 va_start(args, fmt);
2745 len = jio_vsnprintf(str, count, fmt, args);
2746 va_end(args);
2747 return len;
2748 }
2749
2750
2751 int jio_fprintf(FILE* f, const char *fmt, ...) {
2752 int len;
2753 va_list args;
2754 va_start(args, fmt);
2755 len = jio_vfprintf(f, fmt, args);
2756 va_end(args);
2757 return len;
2758 }
2759
2760
2761 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2762 if (Arguments::vfprintf_hook() != NULL) {
2763 return Arguments::vfprintf_hook()(f, fmt, args);
2764 } else {
2765 return vfprintf(f, fmt, args);
2766 }
2767 }
2768
2769
2770 JNIEXPORT int jio_printf(const char *fmt, ...) {
2771 int len;
2772 va_list args;
2773 va_start(args, fmt);
2774 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2775 va_end(args);
2776 return len;
2777 }
2778
2779
2780 // HotSpot specific jio method
2781 void jio_print(const char* s) {
2782 // Try to make this function as atomic as possible.
2783 if (Arguments::vfprintf_hook() != NULL) {
2784 jio_fprintf(defaultStream::output_stream(), "%s", s);
2785 } else {
2786 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2787 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2788 }
2789 }
2790
2791 } // Extern C
2792
2793 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2794
2795 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2796 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2797 // OSThread objects. The exception to this rule is when the target object is the thread
2798 // doing the operation, in which case we know that the thread won't exit until the
2799 // operation is done (all exits being voluntary). There are a few cases where it is
2800 // rather silly to do operations on yourself, like resuming yourself or asking whether
2801 // you are alive. While these can still happen, they are not subject to deadlocks if
2802 // the lock is held while the operation occurs (this is not the case for suspend, for
2803 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2804 // implementation is local to this file, we always lock Threads_lock for that one.
2805
2806 static void thread_entry(JavaThread* thread, TRAPS) {
2807 HandleMark hm(THREAD);
2808 Handle obj(THREAD, thread->threadObj());
2809 JavaValue result(T_VOID);
2810 JavaCalls::call_virtual(&result,
2811 obj,
2812 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2813 vmSymbols::run_method_name(),
2814 vmSymbols::void_method_signature(),
2815 THREAD);
2816 }
2817
2818
2819 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2820 JVMWrapper("JVM_StartThread");
2821 JavaThread *native_thread = NULL;
2822
2823 // We cannot hold the Threads_lock when we throw an exception,
2824 // due to rank ordering issues. Example: we might need to grab the
2825 // Heap_lock while we construct the exception.
2826 bool throw_illegal_thread_state = false;
2827
2828 // We must release the Threads_lock before we can post a jvmti event
2829 // in Thread::start.
2830 {
2831 // Ensure that the C++ Thread and OSThread structures aren't freed before
2832 // we operate.
2833 MutexLocker mu(Threads_lock);
2834
2835 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2836 // re-starting an already started thread, so we should usually find
2837 // that the JavaThread is null. However for a JNI attached thread
2838 // there is a small window between the Thread object being created
2839 // (with its JavaThread set) and the update to its threadStatus, so we
2840 // have to check for this
2841 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2842 throw_illegal_thread_state = true;
2843 } else {
2844 // We could also check the stillborn flag to see if this thread was already stopped, but
2845 // for historical reasons we let the thread detect that itself when it starts running
2846
2847 jlong size =
2848 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2849 // Allocate the C++ Thread structure and create the native thread. The
2850 // stack size retrieved from java is signed, but the constructor takes
2851 // size_t (an unsigned type), so avoid passing negative values which would
2852 // result in really large stacks.
2853 size_t sz = size > 0 ? (size_t) size : 0;
2854 native_thread = new JavaThread(&thread_entry, sz);
2855
2856 // At this point it may be possible that no osthread was created for the
2857 // JavaThread due to lack of memory. Check for this situation and throw
2858 // an exception if necessary. Eventually we may want to change this so
2859 // that we only grab the lock if the thread was created successfully -
2860 // then we can also do this check and throw the exception in the
2861 // JavaThread constructor.
2862 if (native_thread->osthread() != NULL) {
2863 // Note: the current thread is not being used within "prepare".
2864 native_thread->prepare(jthread);
2865 }
2866 }
2867 }
2868
2869 if (throw_illegal_thread_state) {
2870 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2871 }
2872
2873 assert(native_thread != NULL, "Starting null thread?");
2874
2875 if (native_thread->osthread() == NULL) {
2876 // No one should hold a reference to the 'native_thread'.
2877 delete native_thread;
2878 if (JvmtiExport::should_post_resource_exhausted()) {
2879 JvmtiExport::post_resource_exhausted(
2880 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2881 os::native_thread_creation_failed_msg());
2882 }
2883 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2884 os::native_thread_creation_failed_msg());
2885 }
2886
2887 Thread::start(native_thread);
2888
2889 JVM_END
2890
2891 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2892 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2893 // but is thought to be reliable and simple. In the case, where the receiver is the
2894 // same thread as the sender, no safepoint is needed.
2895 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2896 JVMWrapper("JVM_StopThread");
2897
2898 oop java_throwable = JNIHandles::resolve(throwable);
2899 if (java_throwable == NULL) {
2900 THROW(vmSymbols::java_lang_NullPointerException());
2901 }
2902 oop java_thread = JNIHandles::resolve_non_null(jthread);
2903 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2904 Events::log_exception(JavaThread::current(),
2905 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2906 receiver, (address)java_thread, throwable);
2907 // First check if thread is alive
2908 if (receiver != NULL) {
2909 // Check if exception is getting thrown at self (use oop equality, since the
2910 // target object might exit)
2911 if (java_thread == thread->threadObj()) {
2912 THROW_OOP(java_throwable);
2913 } else {
2914 // Enques a VM_Operation to stop all threads and then deliver the exception...
2915 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2916 }
2917 }
2918 else {
2919 // Either:
2920 // - target thread has not been started before being stopped, or
2921 // - target thread already terminated
2922 // We could read the threadStatus to determine which case it is
2923 // but that is overkill as it doesn't matter. We must set the
2924 // stillborn flag for the first case, and if the thread has already
2925 // exited setting this flag has no affect
2926 java_lang_Thread::set_stillborn(java_thread);
2927 }
2928 JVM_END
2929
2930
2931 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2932 JVMWrapper("JVM_IsThreadAlive");
2933
2934 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2935 return java_lang_Thread::is_alive(thread_oop);
2936 JVM_END
2937
2938
2939 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2940 JVMWrapper("JVM_SuspendThread");
2941 oop java_thread = JNIHandles::resolve_non_null(jthread);
2942 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2943
2944 if (receiver != NULL) {
2945 // thread has run and has not exited (still on threads list)
2946
2947 {
2948 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2949 if (receiver->is_external_suspend()) {
2950 // Don't allow nested external suspend requests. We can't return
2951 // an error from this interface so just ignore the problem.
2952 return;
2953 }
2954 if (receiver->is_exiting()) { // thread is in the process of exiting
2955 return;
2956 }
2957 receiver->set_external_suspend();
2958 }
2959
2960 // java_suspend() will catch threads in the process of exiting
2961 // and will ignore them.
2962 receiver->java_suspend();
2963
2964 // It would be nice to have the following assertion in all the
2965 // time, but it is possible for a racing resume request to have
2966 // resumed this thread right after we suspended it. Temporarily
2967 // enable this assertion if you are chasing a different kind of
2968 // bug.
2969 //
2970 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2971 // receiver->is_being_ext_suspended(), "thread is not suspended");
2972 }
2973 JVM_END
2974
2975
2976 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2977 JVMWrapper("JVM_ResumeThread");
2978 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2979 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2980 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2981 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2982 // looks at it.
2983 MutexLocker ml(Threads_lock);
2984 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2985 if (thr != NULL) {
2986 // the thread has run and is not in the process of exiting
2987 thr->java_resume();
2988 }
2989 JVM_END
2990
2991
2992 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2993 JVMWrapper("JVM_SetThreadPriority");
2994 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2995 MutexLocker ml(Threads_lock);
2996 oop java_thread = JNIHandles::resolve_non_null(jthread);
2997 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2998 JavaThread* thr = java_lang_Thread::thread(java_thread);
2999 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3000 Thread::set_priority(thr, (ThreadPriority)prio);
3001 }
3002 JVM_END
3003
3004
3005 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3006 JVMWrapper("JVM_Yield");
3007 if (os::dont_yield()) return;
3008 HOTSPOT_THREAD_YIELD();
3009
3010 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3011 // Critical for similar threading behaviour
3012 if (ConvertYieldToSleep) {
3013 os::sleep(thread, MinSleepInterval, false);
3014 } else {
3015 os::yield();
3016 }
3017 JVM_END
3018
3019
3020 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3021 JVMWrapper("JVM_Sleep");
3022
3023 if (millis < 0) {
3024 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3025 }
3026
3027 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3028 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3029 }
3030
3031 // Save current thread state and restore it at the end of this block.
3032 // And set new thread state to SLEEPING.
3033 JavaThreadSleepState jtss(thread);
3034
3035 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3036
3037 EventThreadSleep event;
3038
3039 if (millis == 0) {
3040 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3041 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3042 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3043 // for SOLARIS
3044 if (ConvertSleepToYield) {
3045 os::yield();
3046 } else {
3047 ThreadState old_state = thread->osthread()->get_state();
3048 thread->osthread()->set_state(SLEEPING);
3049 os::sleep(thread, MinSleepInterval, false);
3050 thread->osthread()->set_state(old_state);
3051 }
3052 } else {
3053 ThreadState old_state = thread->osthread()->get_state();
3054 thread->osthread()->set_state(SLEEPING);
3055 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3056 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3057 // us while we were sleeping. We do not overwrite those.
3058 if (!HAS_PENDING_EXCEPTION) {
3059 if (event.should_commit()) {
3060 event.set_time(millis);
3061 event.commit();
3062 }
3063 HOTSPOT_THREAD_SLEEP_END(1);
3064
3065 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3066 // to properly restore the thread state. That's likely wrong.
3067 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3068 }
3069 }
3070 thread->osthread()->set_state(old_state);
3071 }
3072 if (event.should_commit()) {
3073 event.set_time(millis);
3074 event.commit();
3075 }
3076 HOTSPOT_THREAD_SLEEP_END(0);
3077 JVM_END
3078
3079 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3080 JVMWrapper("JVM_CurrentThread");
3081 oop jthread = thread->threadObj();
3082 assert (thread != NULL, "no current thread!");
3083 return JNIHandles::make_local(env, jthread);
3084 JVM_END
3085
3086
3087 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3088 JVMWrapper("JVM_CountStackFrames");
3089
3090 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3091 oop java_thread = JNIHandles::resolve_non_null(jthread);
3092 bool throw_illegal_thread_state = false;
3093 int count = 0;
3094
3095 {
3096 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3097 // We need to re-resolve the java_thread, since a GC might have happened during the
3098 // acquire of the lock
3099 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3100
3101 if (thr == NULL) {
3102 // do nothing
3103 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3104 // Check whether this java thread has been suspended already. If not, throws
3105 // IllegalThreadStateException. We defer to throw that exception until
3106 // Threads_lock is released since loading exception class has to leave VM.
3107 // The correct way to test a thread is actually suspended is
3108 // wait_for_ext_suspend_completion(), but we can't call that while holding
3109 // the Threads_lock. The above tests are sufficient for our purposes
3110 // provided the walkability of the stack is stable - which it isn't
3111 // 100% but close enough for most practical purposes.
3112 throw_illegal_thread_state = true;
3113 } else {
3114 // Count all java activation, i.e., number of vframes
3115 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3116 // Native frames are not counted
3117 if (!vfst.method()->is_native()) count++;
3118 }
3119 }
3120 }
3121
3122 if (throw_illegal_thread_state) {
3123 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3124 "this thread is not suspended");
3125 }
3126 return count;
3127 JVM_END
3128
3129 // Consider: A better way to implement JVM_Interrupt() is to acquire
3130 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3131 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3132 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3133 // outside the critical section. Threads_lock is hot so we want to minimize
3134 // the hold-time. A cleaner interface would be to decompose interrupt into
3135 // two steps. The 1st phase, performed under Threads_lock, would return
3136 // a closure that'd be invoked after Threads_lock was dropped.
3137 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3138 // admit spurious wakeups.
3139
3140 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3141 JVMWrapper("JVM_Interrupt");
3142
3143 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3144 oop java_thread = JNIHandles::resolve_non_null(jthread);
3145 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3146 // We need to re-resolve the java_thread, since a GC might have happened during the
3147 // acquire of the lock
3148 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3149 if (thr != NULL) {
3150 Thread::interrupt(thr);
3151 }
3152 JVM_END
3153
3154
3155 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3156 JVMWrapper("JVM_IsInterrupted");
3157
3158 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3159 oop java_thread = JNIHandles::resolve_non_null(jthread);
3160 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3161 // We need to re-resolve the java_thread, since a GC might have happened during the
3162 // acquire of the lock
3163 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3164 if (thr == NULL) {
3165 return JNI_FALSE;
3166 } else {
3167 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3168 }
3169 JVM_END
3170
3171
3172 // Return true iff the current thread has locked the object passed in
3173
3174 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3175 JVMWrapper("JVM_HoldsLock");
3176 assert(THREAD->is_Java_thread(), "sanity check");
3177 if (obj == NULL) {
3178 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3179 }
3180 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3181 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3182 JVM_END
3183
3184
3185 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3186 JVMWrapper("JVM_DumpAllStacks");
3187 VM_PrintThreads op;
3188 VMThread::execute(&op);
3189 if (JvmtiExport::should_post_data_dump()) {
3190 JvmtiExport::post_data_dump();
3191 }
3192 JVM_END
3193
3194 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3195 JVMWrapper("JVM_SetNativeThreadName");
3196 ResourceMark rm(THREAD);
3197 oop java_thread = JNIHandles::resolve_non_null(jthread);
3198 JavaThread* thr = java_lang_Thread::thread(java_thread);
3199 // Thread naming only supported for the current thread, doesn't work for
3200 // target threads.
3201 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3202 // we don't set the name of an attached thread to avoid stepping
3203 // on other programs
3204 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3205 os::set_native_thread_name(thread_name);
3206 }
3207 JVM_END
3208
3209 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3210
3211 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3212 assert(jthread->is_Java_thread(), "must be a Java thread");
3213 if (jthread->privileged_stack_top() == NULL) return false;
3214 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3215 oop loader = jthread->privileged_stack_top()->class_loader();
3216 if (loader == NULL) return true;
3217 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3218 if (trusted) return true;
3219 }
3220 return false;
3221 }
3222
3223 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3224 JVMWrapper("JVM_CurrentLoadedClass");
3225 ResourceMark rm(THREAD);
3226
3227 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3228 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3229 bool trusted = is_trusted_frame(thread, &vfst);
3230 if (trusted) return NULL;
3231
3232 Method* m = vfst.method();
3233 if (!m->is_native()) {
3234 InstanceKlass* holder = m->method_holder();
3235 oop loader = holder->class_loader();
3236 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3237 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3238 }
3239 }
3240 }
3241 return NULL;
3242 JVM_END
3243
3244
3245 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3246 JVMWrapper("JVM_CurrentClassLoader");
3247 ResourceMark rm(THREAD);
3248
3249 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3250
3251 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3252 bool trusted = is_trusted_frame(thread, &vfst);
3253 if (trusted) return NULL;
3254
3255 Method* m = vfst.method();
3256 if (!m->is_native()) {
3257 InstanceKlass* holder = m->method_holder();
3258 assert(holder->is_klass(), "just checking");
3259 oop loader = holder->class_loader();
3260 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3261 return JNIHandles::make_local(env, loader);
3262 }
3263 }
3264 }
3265 return NULL;
3266 JVM_END
3267
3268
3269 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3270 JVMWrapper("JVM_GetClassContext");
3271 ResourceMark rm(THREAD);
3272 JvmtiVMObjectAllocEventCollector oam;
3273 vframeStream vfst(thread);
3274
3275 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3276 // This must only be called from SecurityManager.getClassContext
3277 Method* m = vfst.method();
3278 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3279 m->name() == vmSymbols::getClassContext_name() &&
3280 m->signature() == vmSymbols::void_class_array_signature())) {
3281 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3282 }
3283 }
3284
3285 // Collect method holders
3286 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3287 for (; !vfst.at_end(); vfst.security_next()) {
3288 Method* m = vfst.method();
3289 // Native frames are not returned
3290 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3291 Klass* holder = m->method_holder();
3292 assert(holder->is_klass(), "just checking");
3293 klass_array->append(holder);
3294 }
3295 }
3296
3297 // Create result array of type [Ljava/lang/Class;
3298 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3299 // Fill in mirrors corresponding to method holders
3300 for (int i = 0; i < klass_array->length(); i++) {
3301 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3302 }
3303
3304 return (jobjectArray) JNIHandles::make_local(env, result);
3305 JVM_END
3306
3307
3308 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3309 JVMWrapper("JVM_ClassDepth");
3310 ResourceMark rm(THREAD);
3311 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3312 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3313
3314 const char* str = java_lang_String::as_utf8_string(class_name_str());
3315 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3316 if (class_name_sym == NULL) {
3317 return -1;
3318 }
3319
3320 int depth = 0;
3321
3322 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3323 if (!vfst.method()->is_native()) {
3324 InstanceKlass* holder = vfst.method()->method_holder();
3325 assert(holder->is_klass(), "just checking");
3326 if (holder->name() == class_name_sym) {
3327 return depth;
3328 }
3329 depth++;
3330 }
3331 }
3332 return -1;
3333 JVM_END
3334
3335
3336 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3337 JVMWrapper("JVM_ClassLoaderDepth");
3338 ResourceMark rm(THREAD);
3339 int depth = 0;
3340 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3341 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3342 bool trusted = is_trusted_frame(thread, &vfst);
3343 if (trusted) return -1;
3344
3345 Method* m = vfst.method();
3346 if (!m->is_native()) {
3347 InstanceKlass* holder = m->method_holder();
3348 assert(holder->is_klass(), "just checking");
3349 oop loader = holder->class_loader();
3350 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3351 return depth;
3352 }
3353 depth++;
3354 }
3355 }
3356 return -1;
3357 JVM_END
3358
3359
3360 // java.lang.Package ////////////////////////////////////////////////////////////////
3361
3362
3363 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3364 JVMWrapper("JVM_GetSystemPackage");
3365 ResourceMark rm(THREAD);
3366 JvmtiVMObjectAllocEventCollector oam;
3367 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3368 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3369 return (jstring) JNIHandles::make_local(result);
3370 JVM_END
3371
3372
3373 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3374 JVMWrapper("JVM_GetSystemPackages");
3375 JvmtiVMObjectAllocEventCollector oam;
3376 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3377 return (jobjectArray) JNIHandles::make_local(result);
3378 JVM_END
3379
3380
3381 // ObjectInputStream ///////////////////////////////////////////////////////////////
3382
3383 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3384 if (current_class == NULL) {
3385 return true;
3386 }
3387 if ((current_class == field_class) || access.is_public()) {
3388 return true;
3389 }
3390
3391 if (access.is_protected()) {
3392 // See if current_class is a subclass of field_class
3393 if (current_class->is_subclass_of(field_class)) {
3394 return true;
3395 }
3396 }
3397
3398 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3399 }
3400
3401
3402 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3403 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3404 JVMWrapper("JVM_AllocateNewObject");
3405 JvmtiVMObjectAllocEventCollector oam;
3406 // Receiver is not used
3407 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3408 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3409
3410 // Cannot instantiate primitive types
3411 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3412 ResourceMark rm(THREAD);
3413 THROW_0(vmSymbols::java_lang_InvalidClassException());
3414 }
3415
3416 // Arrays not allowed here, must use JVM_AllocateNewArray
3417 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3418 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3419 ResourceMark rm(THREAD);
3420 THROW_0(vmSymbols::java_lang_InvalidClassException());
3421 }
3422
3423 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3424 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3425
3426 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3427
3428 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3429 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3430
3431 // Make sure klass is initialized, since we are about to instantiate one of them.
3432 curr_klass->initialize(CHECK_NULL);
3433
3434 methodHandle m (THREAD,
3435 init_klass->find_method(vmSymbols::object_initializer_name(),
3436 vmSymbols::void_method_signature()));
3437 if (m.is_null()) {
3438 ResourceMark rm(THREAD);
3439 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3440 Method::name_and_sig_as_C_string(init_klass(),
3441 vmSymbols::object_initializer_name(),
3442 vmSymbols::void_method_signature()));
3443 }
3444
3445 if (curr_klass == init_klass && !m->is_public()) {
3446 // Calling the constructor for class 'curr_klass'.
3447 // Only allow calls to a public no-arg constructor.
3448 // This path corresponds to creating an Externalizable object.
3449 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3450 }
3451
3452 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3453 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3454 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3455 }
3456
3457 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3458 // Call constructor m. This might call a constructor higher up in the hierachy
3459 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3460
3461 return JNIHandles::make_local(obj());
3462 JVM_END
3463
3464
3465 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3466 JVMWrapper("JVM_AllocateNewArray");
3467 JvmtiVMObjectAllocEventCollector oam;
3468 oop mirror = JNIHandles::resolve_non_null(currClass);
3469
3470 if (java_lang_Class::is_primitive(mirror)) {
3471 THROW_0(vmSymbols::java_lang_InvalidClassException());
3472 }
3473 Klass* k = java_lang_Class::as_Klass(mirror);
3474 oop result;
3475
3476 if (k->oop_is_typeArray()) {
3477 // typeArray
3478 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3479 } else if (k->oop_is_objArray()) {
3480 // objArray
3481 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3482 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3483 result = oak->allocate(length, CHECK_NULL);
3484 } else {
3485 THROW_0(vmSymbols::java_lang_InvalidClassException());
3486 }
3487 return JNIHandles::make_local(env, result);
3488 JVM_END
3489
3490
3491 // Return the first non-null class loader up the execution stack, or null
3492 // if only code from the null class loader is on the stack.
3493
3494 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3495 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3496 // UseNewReflection
3497 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3498 oop loader = vfst.method()->method_holder()->class_loader();
3499 if (loader != NULL) {
3500 return JNIHandles::make_local(env, loader);
3501 }
3502 }
3503 return NULL;
3504 JVM_END
3505
3506
3507 // Load a class relative to the most recent class on the stack with a non-null
3508 // classloader.
3509 // This function has been deprecated and should not be considered part of the
3510 // specified JVM interface.
3511
3512 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3513 jclass currClass, jstring currClassName))
3514 JVMWrapper("JVM_LoadClass0");
3515 // Receiver is not used
3516 ResourceMark rm(THREAD);
3517
3518 // Class name argument is not guaranteed to be in internal format
3519 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3520 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3521
3522 const char* str = java_lang_String::as_utf8_string(string());
3523
3524 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3525 // It's impossible to create this class; the name cannot fit
3526 // into the constant pool.
3527 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3528 }
3529
3530 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3531 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3532 // Find the most recent class on the stack with a non-null classloader
3533 oop loader = NULL;
3534 oop protection_domain = NULL;
3535 if (curr_klass.is_null()) {
3536 for (vframeStream vfst(thread);
3537 !vfst.at_end() && loader == NULL;
3538 vfst.next()) {
3539 if (!vfst.method()->is_native()) {
3540 InstanceKlass* holder = vfst.method()->method_holder();
3541 loader = holder->class_loader();
3542 protection_domain = holder->protection_domain();
3543 }
3544 }
3545 } else {
3546 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3547 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3548 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3549 }
3550 Handle h_loader(THREAD, loader);
3551 Handle h_prot (THREAD, protection_domain);
3552 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3553 false, thread);
3554 if (TraceClassResolution && result != NULL) {
3555 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3556 }
3557 return result;
3558 JVM_END
3559
3560
3561 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3562
3563
3564 // resolve array handle and check arguments
3565 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3566 if (arr == NULL) {
3567 THROW_0(vmSymbols::java_lang_NullPointerException());
3568 }
3569 oop a = JNIHandles::resolve_non_null(arr);
3570 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3571 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3572 }
3573 return arrayOop(a);
3574 }
3575
3576
3577 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3578 JVMWrapper("JVM_GetArrayLength");
3579 arrayOop a = check_array(env, arr, false, CHECK_0);
3580 return a->length();
3581 JVM_END
3582
3583
3584 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3585 JVMWrapper("JVM_Array_Get");
3586 JvmtiVMObjectAllocEventCollector oam;
3587 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3588 jvalue value;
3589 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3590 oop box = Reflection::box(&value, type, CHECK_NULL);
3591 return JNIHandles::make_local(env, box);
3592 JVM_END
3593
3594
3595 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3596 JVMWrapper("JVM_GetPrimitiveArrayElement");
3597 jvalue value;
3598 value.i = 0; // to initialize value before getting used in CHECK
3599 arrayOop a = check_array(env, arr, true, CHECK_(value));
3600 assert(a->is_typeArray(), "just checking");
3601 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3602 BasicType wide_type = (BasicType) wCode;
3603 if (type != wide_type) {
3604 Reflection::widen(&value, type, wide_type, CHECK_(value));
3605 }
3606 return value;
3607 JVM_END
3608
3609
3610 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3611 JVMWrapper("JVM_SetArrayElement");
3612 arrayOop a = check_array(env, arr, false, CHECK);
3613 oop box = JNIHandles::resolve(val);
3614 jvalue value;
3615 value.i = 0; // to initialize value before getting used in CHECK
3616 BasicType value_type;
3617 if (a->is_objArray()) {
3618 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3619 value_type = Reflection::unbox_for_regular_object(box, &value);
3620 } else {
3621 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3622 }
3623 Reflection::array_set(&value, a, index, value_type, CHECK);
3624 JVM_END
3625
3626
3627 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3628 JVMWrapper("JVM_SetPrimitiveArrayElement");
3629 arrayOop a = check_array(env, arr, true, CHECK);
3630 assert(a->is_typeArray(), "just checking");
3631 BasicType value_type = (BasicType) vCode;
3632 Reflection::array_set(&v, a, index, value_type, CHECK);
3633 JVM_END
3634
3635
3636 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3637 JVMWrapper("JVM_NewArray");
3638 JvmtiVMObjectAllocEventCollector oam;
3639 oop element_mirror = JNIHandles::resolve(eltClass);
3640 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3641 return JNIHandles::make_local(env, result);
3642 JVM_END
3643
3644
3645 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3646 JVMWrapper("JVM_NewMultiArray");
3647 JvmtiVMObjectAllocEventCollector oam;
3648 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3649 oop element_mirror = JNIHandles::resolve(eltClass);
3650 assert(dim_array->is_typeArray(), "just checking");
3651 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3652 return JNIHandles::make_local(env, result);
3653 JVM_END
3654
3655
3656 // Networking library support ////////////////////////////////////////////////////////////////////
3657
3658 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3659 JVMWrapper("JVM_InitializeSocketLibrary");
3660 return 0;
3661 JVM_END
3662
3663
3664 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3665 JVMWrapper("JVM_Socket");
3666 return os::socket(domain, type, protocol);
3667 JVM_END
3668
3669
3670 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3671 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3672 //%note jvm_r6
3673 return os::socket_close(fd);
3674 JVM_END
3675
3676
3677 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3678 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3679 //%note jvm_r6
3680 return os::socket_shutdown(fd, howto);
3681 JVM_END
3682
3683
3684 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3685 JVMWrapper2("JVM_Recv (0x%x)", fd);
3686 //%note jvm_r6
3687 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3688 JVM_END
3689
3690
3691 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3692 JVMWrapper2("JVM_Send (0x%x)", fd);
3693 //%note jvm_r6
3694 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3695 JVM_END
3696
3697
3698 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3699 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3700 //%note jvm_r6
3701 return os::timeout(fd, timeout);
3702 JVM_END
3703
3704
3705 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3706 JVMWrapper2("JVM_Listen (0x%x)", fd);
3707 //%note jvm_r6
3708 return os::listen(fd, count);
3709 JVM_END
3710
3711
3712 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3713 JVMWrapper2("JVM_Connect (0x%x)", fd);
3714 //%note jvm_r6
3715 return os::connect(fd, him, (socklen_t)len);
3716 JVM_END
3717
3718
3719 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3720 JVMWrapper2("JVM_Bind (0x%x)", fd);
3721 //%note jvm_r6
3722 return os::bind(fd, him, (socklen_t)len);
3723 JVM_END
3724
3725
3726 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3727 JVMWrapper2("JVM_Accept (0x%x)", fd);
3728 //%note jvm_r6
3729 socklen_t socklen = (socklen_t)(*len);
3730 jint result = os::accept(fd, him, &socklen);
3731 *len = (jint)socklen;
3732 return result;
3733 JVM_END
3734
3735
3736 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3737 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3738 //%note jvm_r6
3739 socklen_t socklen = (socklen_t)(*fromlen);
3740 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3741 *fromlen = (int)socklen;
3742 return result;
3743 JVM_END
3744
3745
3746 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3747 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3748 //%note jvm_r6
3749 socklen_t socklen = (socklen_t)(*len);
3750 jint result = os::get_sock_name(fd, him, &socklen);
3751 *len = (int)socklen;
3752 return result;
3753 JVM_END
3754
3755
3756 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3757 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3758 //%note jvm_r6
3759 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3760 JVM_END
3761
3762
3763 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3764 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3765 //%note jvm_r6
3766 return os::socket_available(fd, pbytes);
3767 JVM_END
3768
3769
3770 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3771 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3772 //%note jvm_r6
3773 socklen_t socklen = (socklen_t)(*optlen);
3774 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3775 *optlen = (int)socklen;
3776 return result;
3777 JVM_END
3778
3779
3780 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3781 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3782 //%note jvm_r6
3783 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3784 JVM_END
3785
3786
3787 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3788 JVMWrapper("JVM_GetHostName");
3789 return os::get_host_name(name, namelen);
3790 JVM_END
3791
3792
3793 // Library support ///////////////////////////////////////////////////////////////////////////
3794
3795 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3796 //%note jvm_ct
3797 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3798 char ebuf[1024];
3799 void *load_result;
3800 {
3801 ThreadToNativeFromVM ttnfvm(thread);
3802 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3803 }
3804 if (load_result == NULL) {
3805 char msg[1024];
3806 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3807 // Since 'ebuf' may contain a string encoded using
3808 // platform encoding scheme, we need to pass
3809 // Exceptions::unsafe_to_utf8 to the new_exception method
3810 // as the last argument. See bug 6367357.
3811 Handle h_exception =
3812 Exceptions::new_exception(thread,
3813 vmSymbols::java_lang_UnsatisfiedLinkError(),
3814 msg, Exceptions::unsafe_to_utf8);
3815
3816 THROW_HANDLE_0(h_exception);
3817 }
3818 return load_result;
3819 JVM_END
3820
3821
3822 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3823 JVMWrapper("JVM_UnloadLibrary");
3824 os::dll_unload(handle);
3825 JVM_END
3826
3827
3828 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3829 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3830 return os::dll_lookup(handle, name);
3831 JVM_END
3832
3833
3834 // Floating point support ////////////////////////////////////////////////////////////////////
3835
3836 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3837 JVMWrapper("JVM_IsNaN");
3838 return g_isnan(a);
3839 JVM_END
3840
3841
3842 // JNI version ///////////////////////////////////////////////////////////////////////////////
3843
3844 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3845 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3846 return Threads::is_supported_jni_version_including_1_1(version);
3847 JVM_END
3848
3849
3850 // String support ///////////////////////////////////////////////////////////////////////////
3851
3852 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3853 JVMWrapper("JVM_InternString");
3854 JvmtiVMObjectAllocEventCollector oam;
3855 if (str == NULL) return NULL;
3856 oop string = JNIHandles::resolve_non_null(str);
3857 oop result = StringTable::intern(string, CHECK_NULL);
3858 return (jstring) JNIHandles::make_local(env, result);
3859 JVM_END
3860
3861
3862 // Raw monitor support //////////////////////////////////////////////////////////////////////
3863
3864 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3865 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3866 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3867 // that only works with java threads.
3868
3869
3870 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3871 VM_Exit::block_if_vm_exited();
3872 JVMWrapper("JVM_RawMonitorCreate");
3873 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3874 }
3875
3876
3877 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3878 VM_Exit::block_if_vm_exited();
3879 JVMWrapper("JVM_RawMonitorDestroy");
3880 delete ((Mutex*) mon);
3881 }
3882
3883
3884 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3885 VM_Exit::block_if_vm_exited();
3886 JVMWrapper("JVM_RawMonitorEnter");
3887 ((Mutex*) mon)->jvm_raw_lock();
3888 return 0;
3889 }
3890
3891
3892 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3893 VM_Exit::block_if_vm_exited();
3894 JVMWrapper("JVM_RawMonitorExit");
3895 ((Mutex*) mon)->jvm_raw_unlock();
3896 }
3897
3898
3899 // Support for Serialization
3900
3901 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3902 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3903 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3904 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3905
3906 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3907 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3908 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3909 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3910
3911
3912 void initialize_converter_functions() {
3913 if (JDK_Version::is_gte_jdk14x_version()) {
3914 // These functions only exist for compatibility with 1.3.1 and earlier
3915 return;
3916 }
3917
3918 // called from universe_post_init()
3919 assert(
3920 int_bits_to_float_fn == NULL &&
3921 long_bits_to_double_fn == NULL &&
3922 float_to_int_bits_fn == NULL &&
3923 double_to_long_bits_fn == NULL ,
3924 "initialization done twice"
3925 );
3926 // initialize
3927 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3928 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3929 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3930 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3931 // verify
3932 assert(
3933 int_bits_to_float_fn != NULL &&
3934 long_bits_to_double_fn != NULL &&
3935 float_to_int_bits_fn != NULL &&
3936 double_to_long_bits_fn != NULL ,
3937 "initialization failed"
3938 );
3939 }
3940
3941
3942
3943 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3944
3945 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3946 // Security Note:
3947 // The Java level wrapper will perform the necessary security check allowing
3948 // us to pass the NULL as the initiating class loader.
3949 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3950
3951 KlassHandle klass_handle(THREAD, klass);
3952 // Check if we should initialize the class
3953 if (init && klass_handle->oop_is_instance()) {
3954 klass_handle->initialize(CHECK_NULL);
3955 }
3956 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3957 }
3958
3959
3960 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3961
3962 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3963 JVMWrapper("JVM_InvokeMethod");
3964 Handle method_handle;
3965 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3966 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3967 Handle receiver(THREAD, JNIHandles::resolve(obj));
3968 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3969 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3970 jobject res = JNIHandles::make_local(env, result);
3971 if (JvmtiExport::should_post_vm_object_alloc()) {
3972 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3973 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3974 if (java_lang_Class::is_primitive(ret_type)) {
3975 // Only for primitive type vm allocates memory for java object.
3976 // See box() method.
3977 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3978 }
3979 }
3980 return res;
3981 } else {
3982 THROW_0(vmSymbols::java_lang_StackOverflowError());
3983 }
3984 JVM_END
3985
3986
3987 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3988 JVMWrapper("JVM_NewInstanceFromConstructor");
3989 oop constructor_mirror = JNIHandles::resolve(c);
3990 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3991 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3992 jobject res = JNIHandles::make_local(env, result);
3993 if (JvmtiExport::should_post_vm_object_alloc()) {
3994 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3995 }
3996 return res;
3997 JVM_END
3998
3999 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4000
4001 JVM_LEAF(jboolean, JVM_SupportsCX8())
4002 JVMWrapper("JVM_SupportsCX8");
4003 return VM_Version::supports_cx8();
4004 JVM_END
4005
4006
4007 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4008 JVMWrapper("JVM_CX8Field");
4009 jlong res;
4010 oop o = JNIHandles::resolve(obj);
4011 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4012 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4013
4014 assert(VM_Version::supports_cx8(), "cx8 not supported");
4015 res = Atomic::cmpxchg(newVal, addr, oldVal);
4016
4017 return res == oldVal;
4018 JVM_END
4019
4020 // DTrace ///////////////////////////////////////////////////////////////////
4021
4022 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4023 JVMWrapper("JVM_DTraceGetVersion");
4024 return (jint)JVM_TRACING_DTRACE_VERSION;
4025 JVM_END
4026
4027 JVM_ENTRY(jlong,JVM_DTraceActivate(
4028 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4029 JVM_DTraceProvider* providers))
4030 JVMWrapper("JVM_DTraceActivate");
4031 return DTraceJSDT::activate(
4032 version, module_name, providers_count, providers, CHECK_0);
4033 JVM_END
4034
4035 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4036 JVMWrapper("JVM_DTraceIsProbeEnabled");
4037 return DTraceJSDT::is_probe_enabled(method);
4038 JVM_END
4039
4040 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4041 JVMWrapper("JVM_DTraceDispose");
4042 DTraceJSDT::dispose(handle);
4043 JVM_END
4044
4045 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4046 JVMWrapper("JVM_DTraceIsSupported");
4047 return DTraceJSDT::is_supported();
4048 JVM_END
4049
4050 // Returns an array of all live Thread objects (VM internal JavaThreads,
4051 // jvmti agent threads, and JNI attaching threads are skipped)
4052 // See CR 6404306 regarding JNI attaching threads
4053 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4054 ResourceMark rm(THREAD);
4055 ThreadsListEnumerator tle(THREAD, false, false);
4056 JvmtiVMObjectAllocEventCollector oam;
4057
4058 int num_threads = tle.num_threads();
4059 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4060 objArrayHandle threads_ah(THREAD, r);
4061
4062 for (int i = 0; i < num_threads; i++) {
4063 Handle h = tle.get_threadObj(i);
4064 threads_ah->obj_at_put(i, h());
4065 }
4066
4067 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4068 JVM_END
4069
4070
4071 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4072 // Return StackTraceElement[][], each element is the stack trace of a thread in
4073 // the corresponding entry in the given threads array
4074 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4075 JVMWrapper("JVM_DumpThreads");
4076 JvmtiVMObjectAllocEventCollector oam;
4077
4078 // Check if threads is null
4079 if (threads == NULL) {
4080 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4081 }
4082
4083 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4084 objArrayHandle ah(THREAD, a);
4085 int num_threads = ah->length();
4086 // check if threads is non-empty array
4087 if (num_threads == 0) {
4088 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4089 }
4090
4091 // check if threads is not an array of objects of Thread class
4092 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4093 if (k != SystemDictionary::Thread_klass()) {
4094 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4095 }
4096
4097 ResourceMark rm(THREAD);
4098
4099 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4100 for (int i = 0; i < num_threads; i++) {
4101 oop thread_obj = ah->obj_at(i);
4102 instanceHandle h(THREAD, (instanceOop) thread_obj);
4103 thread_handle_array->append(h);
4104 }
4105
4106 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4107 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4108
4109 JVM_END
4110
4111 // JVM monitoring and management support
4112 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4113 return Management::get_jmm_interface(version);
4114 JVM_END
4115
4116 // com.sun.tools.attach.VirtualMachine agent properties support
4117 //
4118 // Initialize the agent properties with the properties maintained in the VM
4119 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4120 JVMWrapper("JVM_InitAgentProperties");
4121 ResourceMark rm;
4122
4123 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4124
4125 PUTPROP(props, "sun.java.command", Arguments::java_command());
4126 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4127 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4128 return properties;
4129 JVM_END
4130
4131 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4132 {
4133 JVMWrapper("JVM_GetEnclosingMethodInfo");
4134 JvmtiVMObjectAllocEventCollector oam;
4135
4136 if (ofClass == NULL) {
4137 return NULL;
4138 }
4139 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4140 // Special handling for primitive objects
4141 if (java_lang_Class::is_primitive(mirror())) {
4142 return NULL;
4143 }
4144 Klass* k = java_lang_Class::as_Klass(mirror());
4145 if (!k->oop_is_instance()) {
4146 return NULL;
4147 }
4148 instanceKlassHandle ik_h(THREAD, k);
4149 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4150 if (encl_method_class_idx == 0) {
4151 return NULL;
4152 }
4153 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4154 objArrayHandle dest(THREAD, dest_o);
4155 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4156 dest->obj_at_put(0, enc_k->java_mirror());
4157 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4158 if (encl_method_method_idx != 0) {
4159 Symbol* sym = ik_h->constants()->symbol_at(
4160 extract_low_short_from_int(
4161 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4162 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4163 dest->obj_at_put(1, str());
4164 sym = ik_h->constants()->symbol_at(
4165 extract_high_short_from_int(
4166 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4167 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4168 dest->obj_at_put(2, str());
4169 }
4170 return (jobjectArray) JNIHandles::make_local(dest());
4171 }
4172 JVM_END
4173
4174 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4175 jint javaThreadState))
4176 {
4177 // If new thread states are added in future JDK and VM versions,
4178 // this should check if the JDK version is compatible with thread
4179 // states supported by the VM. Return NULL if not compatible.
4180 //
4181 // This function must map the VM java_lang_Thread::ThreadStatus
4182 // to the Java thread state that the JDK supports.
4183 //
4184
4185 typeArrayHandle values_h;
4186 switch (javaThreadState) {
4187 case JAVA_THREAD_STATE_NEW : {
4188 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4189 values_h = typeArrayHandle(THREAD, r);
4190 values_h->int_at_put(0, java_lang_Thread::NEW);
4191 break;
4192 }
4193 case JAVA_THREAD_STATE_RUNNABLE : {
4194 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4195 values_h = typeArrayHandle(THREAD, r);
4196 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4197 break;
4198 }
4199 case JAVA_THREAD_STATE_BLOCKED : {
4200 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4201 values_h = typeArrayHandle(THREAD, r);
4202 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4203 break;
4204 }
4205 case JAVA_THREAD_STATE_WAITING : {
4206 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4207 values_h = typeArrayHandle(THREAD, r);
4208 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4209 values_h->int_at_put(1, java_lang_Thread::PARKED);
4210 break;
4211 }
4212 case JAVA_THREAD_STATE_TIMED_WAITING : {
4213 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4214 values_h = typeArrayHandle(THREAD, r);
4215 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4216 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4217 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4218 break;
4219 }
4220 case JAVA_THREAD_STATE_TERMINATED : {
4221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4222 values_h = typeArrayHandle(THREAD, r);
4223 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4224 break;
4225 }
4226 default:
4227 // Unknown state - probably incompatible JDK version
4228 return NULL;
4229 }
4230
4231 return (jintArray) JNIHandles::make_local(env, values_h());
4232 }
4233 JVM_END
4234
4235
4236 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4237 jint javaThreadState,
4238 jintArray values))
4239 {
4240 // If new thread states are added in future JDK and VM versions,
4241 // this should check if the JDK version is compatible with thread
4242 // states supported by the VM. Return NULL if not compatible.
4243 //
4244 // This function must map the VM java_lang_Thread::ThreadStatus
4245 // to the Java thread state that the JDK supports.
4246 //
4247
4248 ResourceMark rm;
4249
4250 // Check if threads is null
4251 if (values == NULL) {
4252 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4253 }
4254
4255 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4256 typeArrayHandle values_h(THREAD, v);
4257
4258 objArrayHandle names_h;
4259 switch (javaThreadState) {
4260 case JAVA_THREAD_STATE_NEW : {
4261 assert(values_h->length() == 1 &&
4262 values_h->int_at(0) == java_lang_Thread::NEW,
4263 "Invalid threadStatus value");
4264
4265 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4266 1, /* only 1 substate */
4267 CHECK_NULL);
4268 names_h = objArrayHandle(THREAD, r);
4269 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4270 names_h->obj_at_put(0, name());
4271 break;
4272 }
4273 case JAVA_THREAD_STATE_RUNNABLE : {
4274 assert(values_h->length() == 1 &&
4275 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4276 "Invalid threadStatus value");
4277
4278 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4279 1, /* only 1 substate */
4280 CHECK_NULL);
4281 names_h = objArrayHandle(THREAD, r);
4282 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4283 names_h->obj_at_put(0, name());
4284 break;
4285 }
4286 case JAVA_THREAD_STATE_BLOCKED : {
4287 assert(values_h->length() == 1 &&
4288 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4289 "Invalid threadStatus value");
4290
4291 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4292 1, /* only 1 substate */
4293 CHECK_NULL);
4294 names_h = objArrayHandle(THREAD, r);
4295 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4296 names_h->obj_at_put(0, name());
4297 break;
4298 }
4299 case JAVA_THREAD_STATE_WAITING : {
4300 assert(values_h->length() == 2 &&
4301 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4302 values_h->int_at(1) == java_lang_Thread::PARKED,
4303 "Invalid threadStatus value");
4304 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4305 2, /* number of substates */
4306 CHECK_NULL);
4307 names_h = objArrayHandle(THREAD, r);
4308 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4309 CHECK_NULL);
4310 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4311 CHECK_NULL);
4312 names_h->obj_at_put(0, name0());
4313 names_h->obj_at_put(1, name1());
4314 break;
4315 }
4316 case JAVA_THREAD_STATE_TIMED_WAITING : {
4317 assert(values_h->length() == 3 &&
4318 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4319 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4320 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4321 "Invalid threadStatus value");
4322 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4323 3, /* number of substates */
4324 CHECK_NULL);
4325 names_h = objArrayHandle(THREAD, r);
4326 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4327 CHECK_NULL);
4328 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4329 CHECK_NULL);
4330 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4331 CHECK_NULL);
4332 names_h->obj_at_put(0, name0());
4333 names_h->obj_at_put(1, name1());
4334 names_h->obj_at_put(2, name2());
4335 break;
4336 }
4337 case JAVA_THREAD_STATE_TERMINATED : {
4338 assert(values_h->length() == 1 &&
4339 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4340 "Invalid threadStatus value");
4341 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4342 1, /* only 1 substate */
4343 CHECK_NULL);
4344 names_h = objArrayHandle(THREAD, r);
4345 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4346 names_h->obj_at_put(0, name());
4347 break;
4348 }
4349 default:
4350 // Unknown state - probably incompatible JDK version
4351 return NULL;
4352 }
4353 return (jobjectArray) JNIHandles::make_local(env, names_h());
4354 }
4355 JVM_END
4356
4357 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4358 {
4359 memset(info, 0, info_size);
4360
4361 info->jvm_version = Abstract_VM_Version::jvm_version();
4362 info->update_version = 0; /* 0 in HotSpot Express VM */
4363 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4364
4365 // when we add a new capability in the jvm_version_info struct, we should also
4366 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4367 // counter defined in runtimeService.cpp.
4368 info->is_attachable = AttachListener::is_attach_supported();
4369 }
4370 JVM_END