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/classLoaderExt.hpp"
28 #include "classfile/javaAssertions.hpp"
29 #include "classfile/javaClasses.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #if INCLUDE_CDS
33 #include "classfile/sharedClassUtil.hpp"
34 #include "classfile/systemDictionaryShared.hpp"
35 #endif
36 #include "classfile/vmSymbols.hpp"
37 #include "gc_interface/collectedHeap.inline.hpp"
38 #include "interpreter/bytecode.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/fieldStreams.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/objArrayKlass.hpp"
44 #include "oops/method.hpp"
45 #include "prims/jvm.h"
46 #include "prims/jvm_misc.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/jvmtiThreadState.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "prims/privilegedStack.hpp"
51 #include "runtime/arguments.hpp"
52 #include "runtime/dtraceJSDT.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/jfieldIDWorkaround.hpp"
59 #include "runtime/orderAccess.inline.hpp"
60 #include "runtime/os.hpp"
61 #include "runtime/perfData.hpp"
62 #include "runtime/reflection.hpp"
63 #include "runtime/vframe.hpp"
64 #include "runtime/vm_operations.hpp"
65 #include "services/attachListener.hpp"
66 #include "services/management.hpp"
67 #include "services/threadService.hpp"
68 #include "trace/tracing.hpp"
69 #include "utilities/copy.hpp"
70 #include "utilities/defaultStream.hpp"
71 #include "utilities/dtrace.hpp"
72 #include "utilities/events.hpp"
73 #include "utilities/histogram.hpp"
74 #include "utilities/top.hpp"
75 #include "utilities/utf8.hpp"
76 #ifdef TARGET_OS_FAMILY_linux
77 # include "jvm_linux.h"
78 #endif
79 #ifdef TARGET_OS_FAMILY_solaris
80 # include "jvm_solaris.h"
81 #endif
82 #ifdef TARGET_OS_FAMILY_windows
83 # include "jvm_windows.h"
84 #endif
85 #ifdef TARGET_OS_FAMILY_aix
86 # include "jvm_aix.h"
87 #endif
88 #ifdef TARGET_OS_FAMILY_bsd
89 # include "jvm_bsd.h"
90 #endif
91
92 #include <errno.h>
93
94 #ifndef USDT2
95 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
96 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
97 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
98 #endif /* !USDT2 */
99
100 /*
101 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
102 such ctors and calls MUST NOT come between an oop declaration/init and its
103 usage because if objects are move this may cause various memory stomps, bus
104 errors and segfaults. Here is a cookbook for causing so called "naked oop
105 failures":
106
107 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
108 JVMWrapper("JVM_GetClassDeclaredFields");
109
110 // Object address to be held directly in mirror & not visible to GC
111 oop mirror = JNIHandles::resolve_non_null(ofClass);
112
113 // If this ctor can hit a safepoint, moving objects around, then
114 ComplexConstructor foo;
115
116 // Boom! mirror may point to JUNK instead of the intended object
117 (some dereference of mirror)
118
119 // Here's another call that may block for GC, making mirror stale
120 MutexLocker ml(some_lock);
121
122 // And here's an initializer that can result in a stale oop
123 // all in one step.
124 oop o = call_that_can_throw_exception(TRAPS);
125
126
127 The solution is to keep the oop declaration BELOW the ctor or function
128 call that might cause a GC, do another resolve to reassign the oop, or
129 consider use of a Handle instead of an oop so there is immunity from object
130 motion. But note that the "QUICK" entries below do not have a handlemark
131 and thus can only support use of handles passed in.
132 */
133
134 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
135 ResourceMark rm;
136 int line_number = -1;
137 const char * source_file = NULL;
138 const char * trace = "explicit";
139 InstanceKlass* caller = NULL;
140 JavaThread* jthread = JavaThread::current();
141 if (jthread->has_last_Java_frame()) {
142 vframeStream vfst(jthread);
143
144 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
145 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
146 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
147 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
148 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
149
150 Method* last_caller = NULL;
151
152 while (!vfst.at_end()) {
153 Method* m = vfst.method();
154 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
155 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
156 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
157 break;
158 }
159 last_caller = m;
160 vfst.next();
161 }
162 // if this is called from Class.forName0 and that is called from Class.forName,
163 // then print the caller of Class.forName. If this is Class.loadClass, then print
164 // that caller, otherwise keep quiet since this should be picked up elsewhere.
165 bool found_it = false;
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName0_name()) {
169 vfst.next();
170 if (!vfst.at_end() &&
171 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
172 vfst.method()->name() == vmSymbols::forName_name()) {
173 vfst.next();
174 found_it = true;
175 }
176 } else if (last_caller != NULL &&
177 last_caller->method_holder()->name() ==
178 vmSymbols::java_lang_ClassLoader() &&
179 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
180 last_caller->name() == vmSymbols::loadClass_name())) {
181 found_it = true;
182 } else if (!vfst.at_end()) {
183 if (vfst.method()->is_native()) {
184 // JNI call
185 found_it = true;
186 }
187 }
188 if (found_it && !vfst.at_end()) {
189 // found the caller
190 caller = vfst.method()->method_holder();
191 line_number = vfst.method()->line_number_from_bci(vfst.bci());
192 if (line_number == -1) {
193 // show method name if it's a native method
194 trace = vfst.method()->name_and_sig_as_C_string();
195 }
196 Symbol* s = caller->source_file_name();
197 if (s != NULL) {
198 source_file = s->as_C_string();
199 }
200 }
201 }
202 if (caller != NULL) {
203 if (to_class != caller) {
204 const char * from = caller->external_name();
205 const char * to = to_class->external_name();
206 // print in a single call to reduce interleaving between threads
207 if (source_file != NULL) {
208 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
209 } else {
210 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
211 }
212 }
213 }
214 }
215
216 void trace_class_resolution(Klass* to_class) {
217 EXCEPTION_MARK;
218 trace_class_resolution_impl(to_class, THREAD);
219 if (HAS_PENDING_EXCEPTION) {
220 CLEAR_PENDING_EXCEPTION;
221 }
222 }
223
224 // Wrapper to trace JVM functions
225
226 #ifdef ASSERT
227 class JVMTraceWrapper : public StackObj {
228 public:
229 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
230 if (TraceJVMCalls) {
231 va_list ap;
232 va_start(ap, format);
233 tty->print("JVM ");
234 tty->vprint_cr(format, ap);
235 va_end(ap);
236 }
237 }
238 };
239
240 Histogram* JVMHistogram;
241 volatile jint JVMHistogram_lock = 0;
242
243 class JVMHistogramElement : public HistogramElement {
244 public:
245 JVMHistogramElement(const char* name);
246 };
247
248 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
249 _name = elementName;
250 uintx count = 0;
251
252 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
253 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
254 count +=1;
255 if ( (WarnOnStalledSpinLock > 0)
256 && (count % WarnOnStalledSpinLock == 0)) {
257 warning("JVMHistogram_lock seems to be stalled");
258 }
259 }
260 }
261
262 if(JVMHistogram == NULL)
263 JVMHistogram = new Histogram("JVM Call Counts",100);
264
265 JVMHistogram->add_element(this);
266 Atomic::dec(&JVMHistogram_lock);
267 }
268
269 #define JVMCountWrapper(arg) \
270 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
271 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
272
273 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
274 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
275 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
276 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
277 #else
278 #define JVMWrapper(arg1)
279 #define JVMWrapper2(arg1, arg2)
280 #define JVMWrapper3(arg1, arg2, arg3)
281 #define JVMWrapper4(arg1, arg2, arg3, arg4)
282 #endif
283
284
285 // Interface version /////////////////////////////////////////////////////////////////////
286
287
288 JVM_LEAF(jint, JVM_GetInterfaceVersion())
289 return JVM_INTERFACE_VERSION;
290 JVM_END
291
292
293 // java.lang.System //////////////////////////////////////////////////////////////////////
294
295
296 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
297 JVMWrapper("JVM_CurrentTimeMillis");
298 return os::javaTimeMillis();
299 JVM_END
300
301 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
302 JVMWrapper("JVM_NanoTime");
303 return os::javaTimeNanos();
304 JVM_END
305
306
307 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
308 jobject dst, jint dst_pos, jint length))
309 JVMWrapper("JVM_ArrayCopy");
310 // Check if we have null pointers
311 if (src == NULL || dst == NULL) {
312 THROW(vmSymbols::java_lang_NullPointerException());
313 }
314 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
315 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
316 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
317 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
318 // Do copy
319 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
320 JVM_END
321
322
323 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
324 JavaValue r(T_OBJECT);
325 // public synchronized Object put(Object key, Object value);
326 HandleMark hm(THREAD);
327 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
328 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
329 JavaCalls::call_virtual(&r,
330 props,
331 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
332 vmSymbols::put_name(),
333 vmSymbols::object_object_object_signature(),
334 key_str,
335 value_str,
336 THREAD);
337 }
338
339
340 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
341
342
343 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
344 JVMWrapper("JVM_InitProperties");
345 ResourceMark rm;
346
347 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
348
349 // System property list includes both user set via -D option and
350 // jvm system specific properties.
351 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
352 PUTPROP(props, p->key(), p->value());
353 }
354
355 // Convert the -XX:MaxDirectMemorySize= command line flag
356 // to the sun.nio.MaxDirectMemorySize property.
357 // Do this after setting user properties to prevent people
358 // from setting the value with a -D option, as requested.
359 {
360 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
361 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
362 } else {
363 char as_chars[256];
364 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
365 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
366 }
367 }
368
369 // JVM monitoring and management support
370 // Add the sun.management.compiler property for the compiler's name
371 {
372 #undef CSIZE
373 #if defined(_LP64) || defined(_WIN64)
374 #define CSIZE "64-Bit "
375 #else
376 #define CSIZE
377 #endif // 64bit
378
379 #ifdef TIERED
380 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
381 #else
382 #if defined(COMPILER1)
383 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
384 #elif defined(COMPILER2)
385 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
386 #else
387 const char* compiler_name = "";
388 #endif // compilers
389 #endif // TIERED
390
391 if (*compiler_name != '\0' &&
392 (Arguments::mode() != Arguments::_int)) {
393 PUTPROP(props, "sun.management.compiler", compiler_name);
394 }
395 }
396
397 const char* enableSharedLookupCache = "false";
398 #if INCLUDE_CDS
399 if (ClassLoaderExt::is_lookup_cache_enabled()) {
400 enableSharedLookupCache = "true";
401 }
402 #endif
403 PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache);
404
405 return properties;
406 JVM_END
407
408
409 /*
410 * Return the temporary directory that the VM uses for the attach
411 * and perf data files.
412 *
413 * It is important that this directory is well-known and the
414 * same for all VM instances. It cannot be affected by configuration
415 * variables such as java.io.tmpdir.
416 */
417 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
418 JVMWrapper("JVM_GetTemporaryDirectory");
419 HandleMark hm(THREAD);
420 const char* temp_dir = os::get_temp_directory();
421 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
422 return (jstring) JNIHandles::make_local(env, h());
423 JVM_END
424
425
426 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
427
428 extern volatile jint vm_created;
429
430 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
431 if (vm_created != 0 && (code == 0)) {
432 // The VM is about to exit. We call back into Java to check whether finalizers should be run
433 Universe::run_finalizers_on_exit();
434 }
435 before_exit(thread);
436 vm_exit(code);
437 JVM_END
438
439
440 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
441 before_exit(thread);
442 vm_exit(code);
443 JVM_END
444
445
446 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
447 register_on_exit_function(func);
448 JVM_END
449
450
451 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
452 JVMWrapper("JVM_GC");
453 if (!DisableExplicitGC) {
454 Universe::heap()->collect(GCCause::_java_lang_system_gc);
455 }
456 JVM_END
457
458
459 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
460 JVMWrapper("JVM_MaxObjectInspectionAge");
461 return Universe::heap()->millis_since_last_gc();
462 JVM_END
463
464
465 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
466 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
467 JVM_END
468
469
470 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
471 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
472 JVM_END
473
474 static inline jlong convert_size_t_to_jlong(size_t val) {
475 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
476 NOT_LP64 (return (jlong)val;)
477 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
478 }
479
480 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
481 JVMWrapper("JVM_TotalMemory");
482 size_t n = Universe::heap()->capacity();
483 return convert_size_t_to_jlong(n);
484 JVM_END
485
486
487 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
488 JVMWrapper("JVM_FreeMemory");
489 CollectedHeap* ch = Universe::heap();
490 size_t n;
491 {
492 MutexLocker x(Heap_lock);
493 n = ch->capacity() - ch->used();
494 }
495 return convert_size_t_to_jlong(n);
496 JVM_END
497
498
499 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
500 JVMWrapper("JVM_MaxMemory");
501 size_t n = Universe::heap()->max_capacity();
502 return convert_size_t_to_jlong(n);
503 JVM_END
504
505
506 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
507 JVMWrapper("JVM_ActiveProcessorCount");
508 return os::active_processor_count();
509 JVM_END
510
511
512
513 // java.lang.Throwable //////////////////////////////////////////////////////
514
515
516 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
517 JVMWrapper("JVM_FillInStackTrace");
518 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
519 java_lang_Throwable::fill_in_stack_trace(exception);
520 JVM_END
521
522
523 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
524 JVMWrapper("JVM_GetStackTraceDepth");
525 oop exception = JNIHandles::resolve(throwable);
526 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
527 JVM_END
528
529
530 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
531 JVMWrapper("JVM_GetStackTraceElement");
532 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
533 oop exception = JNIHandles::resolve(throwable);
534 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
535 return JNIHandles::make_local(env, element);
536 JVM_END
537
538
539 // java.lang.Object ///////////////////////////////////////////////
540
541
542 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
543 JVMWrapper("JVM_IHashCode");
544 // as implemented in the classic virtual machine; return 0 if object is NULL
545 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
546 JVM_END
547
548
549 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
550 JVMWrapper("JVM_MonitorWait");
551 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
552 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
553 if (JvmtiExport::should_post_monitor_wait()) {
554 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
555
556 // The current thread already owns the monitor and it has not yet
557 // been added to the wait queue so the current thread cannot be
558 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
559 // event handler cannot accidentally consume an unpark() meant for
560 // the ParkEvent associated with this ObjectMonitor.
561 }
562 ObjectSynchronizer::wait(obj, ms, CHECK);
563 JVM_END
564
565
566 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
567 JVMWrapper("JVM_MonitorNotify");
568 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
569 ObjectSynchronizer::notify(obj, CHECK);
570 JVM_END
571
572
573 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
574 JVMWrapper("JVM_MonitorNotifyAll");
575 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
576 ObjectSynchronizer::notifyall(obj, CHECK);
577 JVM_END
578
579
580 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
581 JVMWrapper("JVM_Clone");
582 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
583 const KlassHandle klass (THREAD, obj->klass());
584 JvmtiVMObjectAllocEventCollector oam;
585
586 #ifdef ASSERT
587 // Just checking that the cloneable flag is set correct
588 if (obj->is_array()) {
589 guarantee(klass->is_cloneable(), "all arrays are cloneable");
590 } else {
591 guarantee(obj->is_instance(), "should be instanceOop");
592 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
593 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
594 }
595 #endif
596
597 // Check if class of obj supports the Cloneable interface.
598 // All arrays are considered to be cloneable (See JLS 20.1.5)
599 if (!klass->is_cloneable()) {
600 ResourceMark rm(THREAD);
601 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
602 }
603
604 // Make shallow object copy
605 const int size = obj->size();
606 oop new_obj_oop = NULL;
607 if (obj->is_array()) {
608 const int length = ((arrayOop)obj())->length();
609 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
610 } else {
611 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
612 }
613
614 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
615 // is modifying a reference field in the clonee, a non-oop-atomic copy might
616 // be suspended in the middle of copying the pointer and end up with parts
617 // of two different pointers in the field. Subsequent dereferences will crash.
618 // 4846409: an oop-copy of objects with long or double fields or arrays of same
619 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
620 // of oops. We know objects are aligned on a minimum of an jlong boundary.
621 // The same is true of StubRoutines::object_copy and the various oop_copy
622 // variants, and of the code generated by the inline_native_clone intrinsic.
623 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
624 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
625 (size_t)align_object_size(size) / HeapWordsPerLong);
626 // Clear the header
627 new_obj_oop->init_mark();
628
629 // Store check (mark entire object and let gc sort it out)
630 BarrierSet* bs = Universe::heap()->barrier_set();
631 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
632 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
633
634 Handle new_obj(THREAD, new_obj_oop);
635 // Special handling for MemberNames. Since they contain Method* metadata, they
636 // must be registered so that RedefineClasses can fix metadata contained in them.
637 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
638 java_lang_invoke_MemberName::is_method(new_obj())) {
639 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
640 // MemberName may be unresolved, so doesn't need registration until resolved.
641 if (method != NULL) {
642 methodHandle m(THREAD, method);
643 // This can safepoint and redefine method, so need both new_obj and method
644 // in a handle, for two different reasons. new_obj can move, method can be
645 // deleted if nothing is using it on the stack.
646 m->method_holder()->add_member_name(new_obj());
647 }
648 }
649
650 // Caution: this involves a java upcall, so the clone should be
651 // "gc-robust" by this stage.
652 if (klass->has_finalizer()) {
653 assert(obj->is_instance(), "should be instanceOop");
654 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
655 new_obj = Handle(THREAD, new_obj_oop);
656 }
657
658 return JNIHandles::make_local(env, new_obj());
659 JVM_END
660
661 // java.lang.Compiler ////////////////////////////////////////////////////
662
663 // The initial cuts of the HotSpot VM will not support JITs, and all existing
664 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
665 // functions are all silently ignored unless JVM warnings are printed.
666
667 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
668 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
669 JVM_END
670
671
672 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
673 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
674 return JNI_FALSE;
675 JVM_END
676
677
678 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
679 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
680 return JNI_FALSE;
681 JVM_END
682
683
684 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
685 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
686 return JNI_FALSE;
687 JVM_END
688
689
690 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
691 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
692 return NULL;
693 JVM_END
694
695
696 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
697 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
698 JVM_END
699
700
701 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
702 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
703 JVM_END
704
705
706
707 // Error message support //////////////////////////////////////////////////////
708
709 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
710 JVMWrapper("JVM_GetLastErrorString");
711 return (jint)os::lasterror(buf, len);
712 JVM_END
713
714
715 // java.io.File ///////////////////////////////////////////////////////////////
716
717 JVM_LEAF(char*, JVM_NativePath(char* path))
718 JVMWrapper2("JVM_NativePath (%s)", path);
719 return os::native_path(path);
720 JVM_END
721
722
723 // Misc. class handling ///////////////////////////////////////////////////////////
724
725
726 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
727 JVMWrapper("JVM_GetCallerClass");
728
729 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
730 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
731 // temporarily for existing code to use until a replacement API is defined.
732 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
733 Klass* k = thread->security_get_caller_class(depth);
734 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
735 }
736
737 // Getting the class of the caller frame.
738 //
739 // The call stack at this point looks something like this:
740 //
741 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
742 // [1] [ @CallerSensitive API.method ]
743 // [.] [ (skipped intermediate frames) ]
744 // [n] [ caller ]
745 vframeStream vfst(thread);
746 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
747 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
748 Method* m = vfst.method();
749 assert(m != NULL, "sanity");
750 switch (n) {
751 case 0:
752 // This must only be called from Reflection.getCallerClass
753 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
754 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
755 }
756 // fall-through
757 case 1:
758 // Frame 0 and 1 must be caller sensitive.
759 if (!m->caller_sensitive()) {
760 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
761 }
762 break;
763 default:
764 if (!m->is_ignored_by_security_stack_walk()) {
765 // We have reached the desired frame; return the holder class.
766 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
767 }
768 break;
769 }
770 }
771 return NULL;
772 JVM_END
773
774
775 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
776 JVMWrapper("JVM_FindPrimitiveClass");
777 oop mirror = NULL;
778 BasicType t = name2type(utf);
779 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
780 mirror = Universe::java_mirror(t);
781 }
782 if (mirror == NULL) {
783 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
784 } else {
785 return (jclass) JNIHandles::make_local(env, mirror);
786 }
787 JVM_END
788
789
790 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
791 JVMWrapper("JVM_ResolveClass");
792 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
793 JVM_END
794
795
796 JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname))
797 JVMWrapper("JVM_KnownToNotExist");
798 #if INCLUDE_CDS
799 return ClassLoaderExt::known_to_not_exist(env, loader, classname, CHECK_(false));
800 #else
801 return false;
802 #endif
803 JVM_END
804
805
806 JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader))
807 JVMWrapper("JVM_GetResourceLookupCacheURLs");
808 #if INCLUDE_CDS
809 return ClassLoaderExt::get_lookup_cache_urls(env, loader, CHECK_NULL);
810 #else
811 return NULL;
812 #endif
813 JVM_END
814
815
816 JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name))
817 JVMWrapper("JVM_GetResourceLookupCache");
818 #if INCLUDE_CDS
819 return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, CHECK_NULL);
820 #else
821 return NULL;
822 #endif
823 JVM_END
824
825
826 // Returns a class loaded by the bootstrap class loader; or null
827 // if not found. ClassNotFoundException is not thrown.
828 //
829 // Rationale behind JVM_FindClassFromBootLoader
830 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
831 // b> because of (a) java.dll has a direct dependecy on the unexported
832 // private symbol "_JVM_FindClassFromClassLoader@20".
833 // c> the launcher cannot use the private symbol as it dynamically opens
834 // the entry point, so if something changes, the launcher will fail
835 // unexpectedly at runtime, it is safest for the launcher to dlopen a
836 // stable exported interface.
837 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
838 // signature to change from _JVM_FindClassFromClassLoader@20 to
839 // JVM_FindClassFromClassLoader and will not be backward compatible
840 // with older JDKs.
841 // Thus a public/stable exported entry point is the right solution,
842 // public here means public in linker semantics, and is exported only
843 // to the JDK, and is not intended to be a public API.
844
845 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
846 const char* name))
847 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
848
849 // Java libraries should ensure that name is never null...
850 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
851 // It's impossible to create this class; the name cannot fit
852 // into the constant pool.
853 return NULL;
854 }
855
856 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
857 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
858 if (k == NULL) {
859 return NULL;
860 }
861
862 if (TraceClassResolution) {
863 trace_class_resolution(k);
864 }
865 return (jclass) JNIHandles::make_local(env, k->java_mirror());
866 JVM_END
867
868 // Not used; JVM_FindClassFromCaller replaces this.
869 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
870 jboolean init, jobject loader,
871 jboolean throwError))
872 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
873 throwError ? "error" : "exception");
874 // Java libraries should ensure that name is never null...
875 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
876 // It's impossible to create this class; the name cannot fit
877 // into the constant pool.
878 if (throwError) {
879 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
880 } else {
881 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
882 }
883 }
884 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
885 Handle h_loader(THREAD, JNIHandles::resolve(loader));
886 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
887 Handle(), throwError, THREAD);
888
889 if (TraceClassResolution && result != NULL) {
890 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
891 }
892 return result;
893 JVM_END
894
895 // Find a class with this name in this loader, using the caller's protection domain.
896 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
897 jboolean init, jobject loader,
898 jclass caller))
899 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
900 // Java libraries should ensure that name is never null...
901 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
902 // It's impossible to create this class; the name cannot fit
903 // into the constant pool.
904 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
905 }
906
907 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
908
909 oop loader_oop = JNIHandles::resolve(loader);
910 oop from_class = JNIHandles::resolve(caller);
911 oop protection_domain = NULL;
912 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
913 // NPE. Put it in another way, the bootstrap class loader has all permission and
914 // thus no checkPackageAccess equivalence in the VM class loader.
915 // The caller is also passed as NULL by the java code if there is no security
916 // manager to avoid the performance cost of getting the calling class.
917 if (from_class != NULL && loader_oop != NULL) {
918 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
919 }
920
921 Handle h_loader(THREAD, loader_oop);
922 Handle h_prot(THREAD, protection_domain);
923 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
924 h_prot, false, THREAD);
925
926 if (TraceClassResolution && result != NULL) {
927 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
928 }
929 return result;
930 JVM_END
931
932 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
933 jboolean init, jclass from))
934 JVMWrapper2("JVM_FindClassFromClass %s", name);
935 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
936 // It's impossible to create this class; the name cannot fit
937 // into the constant pool.
938 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
939 }
940 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
941 oop from_class_oop = JNIHandles::resolve(from);
942 Klass* from_class = (from_class_oop == NULL)
943 ? (Klass*)NULL
944 : java_lang_Class::as_Klass(from_class_oop);
945 oop class_loader = NULL;
946 oop protection_domain = NULL;
947 if (from_class != NULL) {
948 class_loader = from_class->class_loader();
949 protection_domain = from_class->protection_domain();
950 }
951 Handle h_loader(THREAD, class_loader);
952 Handle h_prot (THREAD, protection_domain);
953 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
954 h_prot, true, thread);
955
956 if (TraceClassResolution && result != NULL) {
957 // this function is generally only used for class loading during verification.
958 ResourceMark rm;
959 oop from_mirror = JNIHandles::resolve_non_null(from);
960 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
961 const char * from_name = from_class->external_name();
962
963 oop mirror = JNIHandles::resolve_non_null(result);
964 Klass* to_class = java_lang_Class::as_Klass(mirror);
965 const char * to = to_class->external_name();
966 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
967 }
968
969 return result;
970 JVM_END
971
972 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
973 if (loader.is_null()) {
974 return;
975 }
976
977 // check whether the current caller thread holds the lock or not.
978 // If not, increment the corresponding counter
979 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
980 ObjectSynchronizer::owner_self) {
981 counter->inc();
982 }
983 }
984
985 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
986 // and JVM_DefineClassWithSourceCond()
987 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
988 jobject loader, const jbyte *buf,
989 jsize len, jobject pd, const char *source,
990 jboolean verify, TRAPS) {
991 if (source == NULL) source = "__JVM_DefineClass__";
992
993 assert(THREAD->is_Java_thread(), "must be a JavaThread");
994 JavaThread* jt = (JavaThread*) THREAD;
995
996 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
997 ClassLoader::perf_define_appclass_selftime(),
998 ClassLoader::perf_define_appclasses(),
999 jt->get_thread_stat()->perf_recursion_counts_addr(),
1000 jt->get_thread_stat()->perf_timers_addr(),
1001 PerfClassTraceTime::DEFINE_CLASS);
1002
1003 if (UsePerfData) {
1004 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
1005 }
1006
1007 // Since exceptions can be thrown, class initialization can take place
1008 // if name is NULL no check for class name in .class stream has to be made.
1009 TempNewSymbol class_name = NULL;
1010 if (name != NULL) {
1011 const int str_len = (int)strlen(name);
1012 if (str_len > Symbol::max_length()) {
1013 // It's impossible to create this class; the name cannot fit
1014 // into the constant pool.
1015 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1016 }
1017 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
1018 }
1019
1020 ResourceMark rm(THREAD);
1021 ClassFileStream st((u1*) buf, len, (char *)source);
1022 Handle class_loader (THREAD, JNIHandles::resolve(loader));
1023 if (UsePerfData) {
1024 is_lock_held_by_thread(class_loader,
1025 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
1026 THREAD);
1027 }
1028 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1029 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
1030 protection_domain, &st,
1031 verify != 0,
1032 CHECK_NULL);
1033
1034 if (TraceClassResolution && k != NULL) {
1035 trace_class_resolution(k);
1036 }
1037
1038 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1039 }
1040
1041
1042 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1043 JVMWrapper2("JVM_DefineClass %s", name);
1044
1045 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1046 JVM_END
1047
1048
1049 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1050 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1051
1052 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1053 JVM_END
1054
1055 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1056 jobject loader, const jbyte *buf,
1057 jsize len, jobject pd,
1058 const char *source, jboolean verify))
1059 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1060
1061 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1062 JVM_END
1063
1064 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1065 JVMWrapper("JVM_FindLoadedClass");
1066 ResourceMark rm(THREAD);
1067
1068 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1069 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1070
1071 const char* str = java_lang_String::as_utf8_string(string());
1072 // Sanity check, don't expect null
1073 if (str == NULL) return NULL;
1074
1075 const int str_len = (int)strlen(str);
1076 if (str_len > Symbol::max_length()) {
1077 // It's impossible to create this class; the name cannot fit
1078 // into the constant pool.
1079 return NULL;
1080 }
1081 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1082
1083 // Security Note:
1084 // The Java level wrapper will perform the necessary security check allowing
1085 // us to pass the NULL as the initiating class loader.
1086 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1087 if (UsePerfData) {
1088 is_lock_held_by_thread(h_loader,
1089 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1090 THREAD);
1091 }
1092
1093 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1094 h_loader,
1095 Handle(),
1096 CHECK_NULL);
1097 #if INCLUDE_CDS
1098 if (k == NULL) {
1099 // If the class is not already loaded, try to see if it's in the shared
1100 // archive for the current classloader (h_loader).
1101 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1102 klass_name, h_loader, CHECK_NULL);
1103 k = ik();
1104 }
1105 #endif
1106 return (k == NULL) ? NULL :
1107 (jclass) JNIHandles::make_local(env, k->java_mirror());
1108 JVM_END
1109
1110
1111 // Reflection support //////////////////////////////////////////////////////////////////////////////
1112
1113 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1114 assert (cls != NULL, "illegal class");
1115 JVMWrapper("JVM_GetClassName");
1116 JvmtiVMObjectAllocEventCollector oam;
1117 ResourceMark rm(THREAD);
1118 const char* name;
1119 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1120 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1121 } else {
1122 // Consider caching interned string in Klass
1123 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1124 assert(k->is_klass(), "just checking");
1125 name = k->external_name();
1126 }
1127 oop result = StringTable::intern((char*) name, CHECK_NULL);
1128 return (jstring) JNIHandles::make_local(env, result);
1129 JVM_END
1130
1131
1132 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1133 JVMWrapper("JVM_GetClassInterfaces");
1134 JvmtiVMObjectAllocEventCollector oam;
1135 oop mirror = JNIHandles::resolve_non_null(cls);
1136
1137 // Special handling for primitive objects
1138 if (java_lang_Class::is_primitive(mirror)) {
1139 // Primitive objects does not have any interfaces
1140 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1141 return (jobjectArray) JNIHandles::make_local(env, r);
1142 }
1143
1144 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1145 // Figure size of result array
1146 int size;
1147 if (klass->oop_is_instance()) {
1148 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1149 } else {
1150 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1151 size = 2;
1152 }
1153
1154 // Allocate result array
1155 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1156 objArrayHandle result (THREAD, r);
1157 // Fill in result
1158 if (klass->oop_is_instance()) {
1159 // Regular instance klass, fill in all local interfaces
1160 for (int index = 0; index < size; index++) {
1161 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1162 result->obj_at_put(index, k->java_mirror());
1163 }
1164 } else {
1165 // All arrays implement java.lang.Cloneable and java.io.Serializable
1166 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1167 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1168 }
1169 return (jobjectArray) JNIHandles::make_local(env, result());
1170 JVM_END
1171
1172
1173 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1174 JVMWrapper("JVM_GetClassLoader");
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1176 return NULL;
1177 }
1178 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1179 oop loader = k->class_loader();
1180 return JNIHandles::make_local(env, loader);
1181 JVM_END
1182
1183
1184 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1185 JVMWrapper("JVM_IsInterface");
1186 oop mirror = JNIHandles::resolve_non_null(cls);
1187 if (java_lang_Class::is_primitive(mirror)) {
1188 return JNI_FALSE;
1189 }
1190 Klass* k = java_lang_Class::as_Klass(mirror);
1191 jboolean result = k->is_interface();
1192 assert(!result || k->oop_is_instance(),
1193 "all interfaces are instance types");
1194 // The compiler intrinsic for isInterface tests the
1195 // Klass::_access_flags bits in the same way.
1196 return result;
1197 JVM_END
1198
1199
1200 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1201 JVMWrapper("JVM_GetClassSigners");
1202 JvmtiVMObjectAllocEventCollector oam;
1203 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1204 // There are no signers for primitive types
1205 return NULL;
1206 }
1207
1208 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1209
1210 // If there are no signers set in the class, or if the class
1211 // is an array, return NULL.
1212 if (signers == NULL) return NULL;
1213
1214 // copy of the signers array
1215 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1216 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1217 for (int index = 0; index < signers->length(); index++) {
1218 signers_copy->obj_at_put(index, signers->obj_at(index));
1219 }
1220
1221 // return the copy
1222 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1223 JVM_END
1224
1225
1226 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1227 JVMWrapper("JVM_SetClassSigners");
1228 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1229 // This call is ignored for primitive types and arrays.
1230 // Signers are only set once, ClassLoader.java, and thus shouldn't
1231 // be called with an array. Only the bootstrap loader creates arrays.
1232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1233 if (k->oop_is_instance()) {
1234 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1235 }
1236 }
1237 JVM_END
1238
1239
1240 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1241 JVMWrapper("JVM_GetProtectionDomain");
1242 if (JNIHandles::resolve(cls) == NULL) {
1243 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1244 }
1245
1246 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1247 // Primitive types does not have a protection domain.
1248 return NULL;
1249 }
1250
1251 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1252 return (jobject) JNIHandles::make_local(env, pd);
1253 JVM_END
1254
1255
1256 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1257 // If there is a security manager and protection domain, check the access
1258 // in the protection domain, otherwise it is authorized.
1259 if (java_lang_System::has_security_manager()) {
1260
1261 // For bootstrapping, if pd implies method isn't in the JDK, allow
1262 // this context to revert to older behavior.
1263 // In this case the isAuthorized field in AccessControlContext is also not
1264 // present.
1265 if (Universe::protection_domain_implies_method() == NULL) {
1266 return true;
1267 }
1268
1269 // Whitelist certain access control contexts
1270 if (java_security_AccessControlContext::is_authorized(context)) {
1271 return true;
1272 }
1273
1274 oop prot = klass->protection_domain();
1275 if (prot != NULL) {
1276 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1277 // in the new wrapper.
1278 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1279 Handle h_prot(THREAD, prot);
1280 JavaValue result(T_BOOLEAN);
1281 JavaCallArguments args(h_prot);
1282 JavaCalls::call(&result, m, &args, CHECK_false);
1283 return (result.get_jboolean() != 0);
1284 }
1285 }
1286 return true;
1287 }
1288
1289 // Create an AccessControlContext with a protection domain with null codesource
1290 // and null permissions - which gives no permissions.
1291 oop create_dummy_access_control_context(TRAPS) {
1292 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1293 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1294 // Call constructor ProtectionDomain(null, null);
1295 JavaValue result(T_VOID);
1296 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1297 vmSymbols::object_initializer_name(),
1298 vmSymbols::codesource_permissioncollection_signature(),
1299 Handle(), Handle(), CHECK_NULL);
1300
1301 // new ProtectionDomain[] {pd};
1302 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1303 context->obj_at_put(0, obj());
1304
1305 // new AccessControlContext(new ProtectionDomain[] {pd})
1306 objArrayHandle h_context(THREAD, context);
1307 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1308 return acc;
1309 }
1310
1311 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1312 JVMWrapper("JVM_DoPrivileged");
1313
1314 if (action == NULL) {
1315 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1316 }
1317
1318 // Compute the frame initiating the do privileged operation and setup the privileged stack
1319 vframeStream vfst(thread);
1320 vfst.security_get_caller_frame(1);
1321
1322 if (vfst.at_end()) {
1323 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1324 }
1325
1326 Method* method = vfst.method();
1327 instanceKlassHandle klass (THREAD, method->method_holder());
1328
1329 // Check that action object understands "Object run()"
1330 Handle h_context;
1331 if (context != NULL) {
1332 h_context = Handle(THREAD, JNIHandles::resolve(context));
1333 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1334 if (!authorized) {
1335 // Create an unprivileged access control object and call it's run function
1336 // instead.
1337 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1338 h_context = Handle(THREAD, noprivs);
1339 }
1340 }
1341
1342 // Check that action object understands "Object run()"
1343 Handle object (THREAD, JNIHandles::resolve(action));
1344
1345 // get run() method
1346 Method* m_oop = object->klass()->uncached_lookup_method(
1347 vmSymbols::run_method_name(),
1348 vmSymbols::void_object_signature(),
1349 Klass::normal);
1350 methodHandle m (THREAD, m_oop);
1351 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1352 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1353 }
1354
1355 // Stack allocated list of privileged stack elements
1356 PrivilegedElement pi;
1357 if (!vfst.at_end()) {
1358 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1359 thread->set_privileged_stack_top(&pi);
1360 }
1361
1362
1363 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1364 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1365 Handle pending_exception;
1366 JavaValue result(T_OBJECT);
1367 JavaCallArguments args(object);
1368 JavaCalls::call(&result, m, &args, THREAD);
1369
1370 // done with action, remove ourselves from the list
1371 if (!vfst.at_end()) {
1372 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1373 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1374 }
1375
1376 if (HAS_PENDING_EXCEPTION) {
1377 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1378 CLEAR_PENDING_EXCEPTION;
1379 // JVMTI has already reported the pending exception
1380 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1381 if (THREAD->is_Java_thread()) {
1382 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1383 }
1384 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1385 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1386 // Throw a java.security.PrivilegedActionException(Exception e) exception
1387 JavaCallArguments args(pending_exception);
1388 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1389 vmSymbols::exception_void_signature(),
1390 &args);
1391 }
1392 }
1393
1394 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1395 return JNIHandles::make_local(env, (oop) result.get_jobject());
1396 JVM_END
1397
1398
1399 // Returns the inherited_access_control_context field of the running thread.
1400 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1401 JVMWrapper("JVM_GetInheritedAccessControlContext");
1402 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1403 return JNIHandles::make_local(env, result);
1404 JVM_END
1405
1406 class RegisterArrayForGC {
1407 private:
1408 JavaThread *_thread;
1409 public:
1410 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1411 _thread = thread;
1412 _thread->register_array_for_gc(array);
1413 }
1414
1415 ~RegisterArrayForGC() {
1416 _thread->register_array_for_gc(NULL);
1417 }
1418 };
1419
1420
1421 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1422 JVMWrapper("JVM_GetStackAccessControlContext");
1423 if (!UsePrivilegedStack) return NULL;
1424
1425 ResourceMark rm(THREAD);
1426 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1427 JvmtiVMObjectAllocEventCollector oam;
1428
1429 // count the protection domains on the execution stack. We collapse
1430 // duplicate consecutive protection domains into a single one, as
1431 // well as stopping when we hit a privileged frame.
1432
1433 // Use vframeStream to iterate through Java frames
1434 vframeStream vfst(thread);
1435
1436 oop previous_protection_domain = NULL;
1437 Handle privileged_context(thread, NULL);
1438 bool is_privileged = false;
1439 oop protection_domain = NULL;
1440
1441 for(; !vfst.at_end(); vfst.next()) {
1442 // get method of frame
1443 Method* method = vfst.method();
1444 intptr_t* frame_id = vfst.frame_id();
1445
1446 // check the privileged frames to see if we have a match
1447 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1448 // this frame is privileged
1449 is_privileged = true;
1450 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1451 protection_domain = thread->privileged_stack_top()->protection_domain();
1452 } else {
1453 protection_domain = method->method_holder()->protection_domain();
1454 }
1455
1456 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1457 local_array->push(protection_domain);
1458 previous_protection_domain = protection_domain;
1459 }
1460
1461 if (is_privileged) break;
1462 }
1463
1464
1465 // either all the domains on the stack were system domains, or
1466 // we had a privileged system domain
1467 if (local_array->is_empty()) {
1468 if (is_privileged && privileged_context.is_null()) return NULL;
1469
1470 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1471 return JNIHandles::make_local(env, result);
1472 }
1473
1474 // the resource area must be registered in case of a gc
1475 RegisterArrayForGC ragc(thread, local_array);
1476 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1477 local_array->length(), CHECK_NULL);
1478 objArrayHandle h_context(thread, context);
1479 for (int index = 0; index < local_array->length(); index++) {
1480 h_context->obj_at_put(index, local_array->at(index));
1481 }
1482
1483 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1484
1485 return JNIHandles::make_local(env, result);
1486 JVM_END
1487
1488
1489 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1490 JVMWrapper("JVM_IsArrayClass");
1491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1492 return (k != NULL) && k->oop_is_array() ? true : false;
1493 JVM_END
1494
1495
1496 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1497 JVMWrapper("JVM_IsPrimitiveClass");
1498 oop mirror = JNIHandles::resolve_non_null(cls);
1499 return (jboolean) java_lang_Class::is_primitive(mirror);
1500 JVM_END
1501
1502
1503 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1504 JVMWrapper("JVM_GetComponentType");
1505 oop mirror = JNIHandles::resolve_non_null(cls);
1506 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1507 return (jclass) JNIHandles::make_local(env, result);
1508 JVM_END
1509
1510
1511 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1512 JVMWrapper("JVM_GetClassModifiers");
1513 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1514 // Primitive type
1515 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1516 }
1517
1518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1519 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1520 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1521 return k->modifier_flags();
1522 JVM_END
1523
1524
1525 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1526
1527 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1528 JvmtiVMObjectAllocEventCollector oam;
1529 // ofClass is a reference to a java_lang_Class object. The mirror object
1530 // of an InstanceKlass
1531
1532 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1533 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1534 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1535 return (jobjectArray)JNIHandles::make_local(env, result);
1536 }
1537
1538 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1539 InnerClassesIterator iter(k);
1540
1541 if (iter.length() == 0) {
1542 // Neither an inner nor outer class
1543 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1544 return (jobjectArray)JNIHandles::make_local(env, result);
1545 }
1546
1547 // find inner class info
1548 constantPoolHandle cp(thread, k->constants());
1549 int length = iter.length();
1550
1551 // Allocate temp. result array
1552 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1553 objArrayHandle result (THREAD, r);
1554 int members = 0;
1555
1556 for (; !iter.done(); iter.next()) {
1557 int ioff = iter.inner_class_info_index();
1558 int ooff = iter.outer_class_info_index();
1559
1560 if (ioff != 0 && ooff != 0) {
1561 // Check to see if the name matches the class we're looking for
1562 // before attempting to find the class.
1563 if (cp->klass_name_at_matches(k, ooff)) {
1564 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1565 if (outer_klass == k()) {
1566 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1567 instanceKlassHandle inner_klass (THREAD, ik);
1568
1569 // Throws an exception if outer klass has not declared k as
1570 // an inner klass
1571 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1572
1573 result->obj_at_put(members, inner_klass->java_mirror());
1574 members++;
1575 }
1576 }
1577 }
1578 }
1579
1580 if (members != length) {
1581 // Return array of right length
1582 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1583 for(int i = 0; i < members; i++) {
1584 res->obj_at_put(i, result->obj_at(i));
1585 }
1586 return (jobjectArray)JNIHandles::make_local(env, res);
1587 }
1588
1589 return (jobjectArray)JNIHandles::make_local(env, result());
1590 JVM_END
1591
1592
1593 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1594 {
1595 // ofClass is a reference to a java_lang_Class object.
1596 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1597 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1598 return NULL;
1599 }
1600
1601 bool inner_is_member = false;
1602 Klass* outer_klass
1603 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1604 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1605 if (outer_klass == NULL) return NULL; // already a top-level class
1606 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1607 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1608 }
1609 JVM_END
1610
1611 // should be in InstanceKlass.cpp, but is here for historical reasons
1612 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1613 bool* inner_is_member,
1614 TRAPS) {
1615 Thread* thread = THREAD;
1616 InnerClassesIterator iter(k);
1617 if (iter.length() == 0) {
1618 // No inner class info => no declaring class
1619 return NULL;
1620 }
1621
1622 constantPoolHandle i_cp(thread, k->constants());
1623
1624 bool found = false;
1625 Klass* ok;
1626 instanceKlassHandle outer_klass;
1627 *inner_is_member = false;
1628
1629 // Find inner_klass attribute
1630 for (; !iter.done() && !found; iter.next()) {
1631 int ioff = iter.inner_class_info_index();
1632 int ooff = iter.outer_class_info_index();
1633 int noff = iter.inner_name_index();
1634 if (ioff != 0) {
1635 // Check to see if the name matches the class we're looking for
1636 // before attempting to find the class.
1637 if (i_cp->klass_name_at_matches(k, ioff)) {
1638 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1639 found = (k() == inner_klass);
1640 if (found && ooff != 0) {
1641 ok = i_cp->klass_at(ooff, CHECK_NULL);
1642 outer_klass = instanceKlassHandle(thread, ok);
1643 *inner_is_member = true;
1644 }
1645 }
1646 }
1647 }
1648
1649 if (found && outer_klass.is_null()) {
1650 // It may be anonymous; try for that.
1651 int encl_method_class_idx = k->enclosing_method_class_index();
1652 if (encl_method_class_idx != 0) {
1653 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1654 outer_klass = instanceKlassHandle(thread, ok);
1655 *inner_is_member = false;
1656 }
1657 }
1658
1659 // If no inner class attribute found for this class.
1660 if (outer_klass.is_null()) return NULL;
1661
1662 // Throws an exception if outer klass has not declared k as an inner klass
1663 // We need evidence that each klass knows about the other, or else
1664 // the system could allow a spoof of an inner class to gain access rights.
1665 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1666 return outer_klass();
1667 }
1668
1669 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1670 assert (cls != NULL, "illegal class");
1671 JVMWrapper("JVM_GetClassSignature");
1672 JvmtiVMObjectAllocEventCollector oam;
1673 ResourceMark rm(THREAD);
1674 // Return null for arrays and primatives
1675 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1676 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1677 if (k->oop_is_instance()) {
1678 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1679 if (sym == NULL) return NULL;
1680 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1681 return (jstring) JNIHandles::make_local(env, str());
1682 }
1683 }
1684 return NULL;
1685 JVM_END
1686
1687
1688 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1689 assert (cls != NULL, "illegal class");
1690 JVMWrapper("JVM_GetClassAnnotations");
1691
1692 // Return null for arrays and primitives
1693 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1694 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1695 if (k->oop_is_instance()) {
1696 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1697 return (jbyteArray) JNIHandles::make_local(env, a);
1698 }
1699 }
1700 return NULL;
1701 JVM_END
1702
1703
1704 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1705 // some of this code was adapted from from jni_FromReflectedField
1706
1707 oop reflected = JNIHandles::resolve_non_null(field);
1708 oop mirror = java_lang_reflect_Field::clazz(reflected);
1709 Klass* k = java_lang_Class::as_Klass(mirror);
1710 int slot = java_lang_reflect_Field::slot(reflected);
1711 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1712
1713 KlassHandle kh(THREAD, k);
1714 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1715
1716 if (modifiers & JVM_ACC_STATIC) {
1717 // for static fields we only look in the current class
1718 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1719 assert(false, "cannot find static field");
1720 return false;
1721 }
1722 } else {
1723 // for instance fields we start with the current class and work
1724 // our way up through the superclass chain
1725 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1726 assert(false, "cannot find instance field");
1727 return false;
1728 }
1729 }
1730 return true;
1731 }
1732
1733 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1734 // field is a handle to a java.lang.reflect.Field object
1735 assert(field != NULL, "illegal field");
1736 JVMWrapper("JVM_GetFieldAnnotations");
1737
1738 fieldDescriptor fd;
1739 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1740 if (!gotFd) {
1741 return NULL;
1742 }
1743
1744 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1745 JVM_END
1746
1747
1748 static Method* jvm_get_method_common(jobject method) {
1749 // some of this code was adapted from from jni_FromReflectedMethod
1750
1751 oop reflected = JNIHandles::resolve_non_null(method);
1752 oop mirror = NULL;
1753 int slot = 0;
1754
1755 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1756 mirror = java_lang_reflect_Constructor::clazz(reflected);
1757 slot = java_lang_reflect_Constructor::slot(reflected);
1758 } else {
1759 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1760 "wrong type");
1761 mirror = java_lang_reflect_Method::clazz(reflected);
1762 slot = java_lang_reflect_Method::slot(reflected);
1763 }
1764 Klass* k = java_lang_Class::as_Klass(mirror);
1765
1766 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1767 assert(m != NULL, "cannot find method");
1768 return m; // caller has to deal with NULL in product mode
1769 }
1770
1771
1772 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1773 JVMWrapper("JVM_GetMethodAnnotations");
1774
1775 // method is a handle to a java.lang.reflect.Method object
1776 Method* m = jvm_get_method_common(method);
1777 if (m == NULL) {
1778 return NULL;
1779 }
1780
1781 return (jbyteArray) JNIHandles::make_local(env,
1782 Annotations::make_java_array(m->annotations(), THREAD));
1783 JVM_END
1784
1785
1786 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1787 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1788
1789 // method is a handle to a java.lang.reflect.Method object
1790 Method* m = jvm_get_method_common(method);
1791 if (m == NULL) {
1792 return NULL;
1793 }
1794
1795 return (jbyteArray) JNIHandles::make_local(env,
1796 Annotations::make_java_array(m->annotation_default(), THREAD));
1797 JVM_END
1798
1799
1800 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1801 JVMWrapper("JVM_GetMethodParameterAnnotations");
1802
1803 // method is a handle to a java.lang.reflect.Method object
1804 Method* m = jvm_get_method_common(method);
1805 if (m == NULL) {
1806 return NULL;
1807 }
1808
1809 return (jbyteArray) JNIHandles::make_local(env,
1810 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1811 JVM_END
1812
1813 /* Type use annotations support (JDK 1.8) */
1814
1815 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1816 assert (cls != NULL, "illegal class");
1817 JVMWrapper("JVM_GetClassTypeAnnotations");
1818 ResourceMark rm(THREAD);
1819 // Return null for arrays and primitives
1820 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1821 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1822 if (k->oop_is_instance()) {
1823 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1824 if (type_annotations != NULL) {
1825 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1826 return (jbyteArray) JNIHandles::make_local(env, a);
1827 }
1828 }
1829 }
1830 return NULL;
1831 JVM_END
1832
1833 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1834 assert (method != NULL, "illegal method");
1835 JVMWrapper("JVM_GetMethodTypeAnnotations");
1836
1837 // method is a handle to a java.lang.reflect.Method object
1838 Method* m = jvm_get_method_common(method);
1839 if (m == NULL) {
1840 return NULL;
1841 }
1842
1843 AnnotationArray* type_annotations = m->type_annotations();
1844 if (type_annotations != NULL) {
1845 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1846 return (jbyteArray) JNIHandles::make_local(env, a);
1847 }
1848
1849 return NULL;
1850 JVM_END
1851
1852 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1853 assert (field != NULL, "illegal field");
1854 JVMWrapper("JVM_GetFieldTypeAnnotations");
1855
1856 fieldDescriptor fd;
1857 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1858 if (!gotFd) {
1859 return NULL;
1860 }
1861
1862 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1863 JVM_END
1864
1865 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1866 if (!cp->is_within_bounds(index)) {
1867 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1868 }
1869 }
1870
1871 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1872 {
1873 JVMWrapper("JVM_GetMethodParameters");
1874 // method is a handle to a java.lang.reflect.Method object
1875 Method* method_ptr = jvm_get_method_common(method);
1876 methodHandle mh (THREAD, method_ptr);
1877 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1878 const int num_params = mh->method_parameters_length();
1879
1880 if (0 != num_params) {
1881 // make sure all the symbols are properly formatted
1882 for (int i = 0; i < num_params; i++) {
1883 MethodParametersElement* params = mh->method_parameters_start();
1884 int index = params[i].name_cp_index;
1885 bounds_check(mh->constants(), index, CHECK_NULL);
1886
1887 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1888 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1889 "Wrong type at constant pool index");
1890 }
1891
1892 }
1893
1894 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1895 objArrayHandle result (THREAD, result_oop);
1896
1897 for (int i = 0; i < num_params; i++) {
1898 MethodParametersElement* params = mh->method_parameters_start();
1899 // For a 0 index, give a NULL symbol
1900 Symbol* sym = 0 != params[i].name_cp_index ?
1901 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1902 int flags = params[i].flags;
1903 oop param = Reflection::new_parameter(reflected_method, i, sym,
1904 flags, CHECK_NULL);
1905 result->obj_at_put(i, param);
1906 }
1907 return (jobjectArray)JNIHandles::make_local(env, result());
1908 } else {
1909 return (jobjectArray)NULL;
1910 }
1911 }
1912 JVM_END
1913
1914 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1915
1916 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1917 {
1918 JVMWrapper("JVM_GetClassDeclaredFields");
1919 JvmtiVMObjectAllocEventCollector oam;
1920
1921 // Exclude primitive types and array types
1922 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1923 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1924 // Return empty array
1925 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1926 return (jobjectArray) JNIHandles::make_local(env, res);
1927 }
1928
1929 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1930 constantPoolHandle cp(THREAD, k->constants());
1931
1932 // Ensure class is linked
1933 k->link_class(CHECK_NULL);
1934
1935 // 4496456 We need to filter out java.lang.Throwable.backtrace
1936 bool skip_backtrace = false;
1937
1938 // Allocate result
1939 int num_fields;
1940
1941 if (publicOnly) {
1942 num_fields = 0;
1943 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1944 if (fs.access_flags().is_public()) ++num_fields;
1945 }
1946 } else {
1947 num_fields = k->java_fields_count();
1948
1949 if (k() == SystemDictionary::Throwable_klass()) {
1950 num_fields--;
1951 skip_backtrace = true;
1952 }
1953 }
1954
1955 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1956 objArrayHandle result (THREAD, r);
1957
1958 int out_idx = 0;
1959 fieldDescriptor fd;
1960 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1961 if (skip_backtrace) {
1962 // 4496456 skip java.lang.Throwable.backtrace
1963 int offset = fs.offset();
1964 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1965 }
1966
1967 if (!publicOnly || fs.access_flags().is_public()) {
1968 fd.reinitialize(k(), fs.index());
1969 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1970 result->obj_at_put(out_idx, field);
1971 ++out_idx;
1972 }
1973 }
1974 assert(out_idx == num_fields, "just checking");
1975 return (jobjectArray) JNIHandles::make_local(env, result());
1976 }
1977 JVM_END
1978
1979 static bool select_method(methodHandle method, bool want_constructor) {
1980 if (want_constructor) {
1981 return (method->is_initializer() && !method->is_static());
1982 } else {
1983 return (!method->is_initializer() && !method->is_overpass());
1984 }
1985 }
1986
1987 static jobjectArray get_class_declared_methods_helper(
1988 JNIEnv *env,
1989 jclass ofClass, jboolean publicOnly,
1990 bool want_constructor,
1991 Klass* klass, TRAPS) {
1992
1993 JvmtiVMObjectAllocEventCollector oam;
1994
1995 // Exclude primitive types and array types
1996 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1997 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1998 // Return empty array
1999 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
2000 return (jobjectArray) JNIHandles::make_local(env, res);
2001 }
2002
2003 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2004
2005 // Ensure class is linked
2006 k->link_class(CHECK_NULL);
2007
2008 Array<Method*>* methods = k->methods();
2009 int methods_length = methods->length();
2010
2011 // Save original method_idnum in case of redefinition, which can change
2012 // the idnum of obsolete methods. The new method will have the same idnum
2013 // but if we refresh the methods array, the counts will be wrong.
2014 ResourceMark rm(THREAD);
2015 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2016 int num_methods = 0;
2017
2018 for (int i = 0; i < methods_length; i++) {
2019 methodHandle method(THREAD, methods->at(i));
2020 if (select_method(method, want_constructor)) {
2021 if (!publicOnly || method->is_public()) {
2022 idnums->push(method->method_idnum());
2023 ++num_methods;
2024 }
2025 }
2026 }
2027
2028 // Allocate result
2029 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2030 objArrayHandle result (THREAD, r);
2031
2032 // Now just put the methods that we selected above, but go by their idnum
2033 // in case of redefinition. The methods can be redefined at any safepoint,
2034 // so above when allocating the oop array and below when creating reflect
2035 // objects.
2036 for (int i = 0; i < num_methods; i++) {
2037 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2038 if (method.is_null()) {
2039 // Method may have been deleted and seems this API can handle null
2040 // Otherwise should probably put a method that throws NSME
2041 result->obj_at_put(i, NULL);
2042 } else {
2043 oop m;
2044 if (want_constructor) {
2045 m = Reflection::new_constructor(method, CHECK_NULL);
2046 } else {
2047 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2048 }
2049 result->obj_at_put(i, m);
2050 }
2051 }
2052
2053 return (jobjectArray) JNIHandles::make_local(env, result());
2054 }
2055
2056 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2057 {
2058 JVMWrapper("JVM_GetClassDeclaredMethods");
2059 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2060 /*want_constructor*/ false,
2061 SystemDictionary::reflect_Method_klass(), THREAD);
2062 }
2063 JVM_END
2064
2065 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2066 {
2067 JVMWrapper("JVM_GetClassDeclaredConstructors");
2068 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2069 /*want_constructor*/ true,
2070 SystemDictionary::reflect_Constructor_klass(), THREAD);
2071 }
2072 JVM_END
2073
2074 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2075 {
2076 JVMWrapper("JVM_GetClassAccessFlags");
2077 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2078 // Primitive type
2079 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2080 }
2081
2082 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2083 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2084 }
2085 JVM_END
2086
2087
2088 // Constant pool access //////////////////////////////////////////////////////////
2089
2090 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2091 {
2092 JVMWrapper("JVM_GetClassConstantPool");
2093 JvmtiVMObjectAllocEventCollector oam;
2094
2095 // Return null for primitives and arrays
2096 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2097 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2098 if (k->oop_is_instance()) {
2099 instanceKlassHandle k_h(THREAD, k);
2100 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2101 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2102 return JNIHandles::make_local(jcp());
2103 }
2104 }
2105 return NULL;
2106 }
2107 JVM_END
2108
2109
2110 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2111 {
2112 JVMWrapper("JVM_ConstantPoolGetSize");
2113 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2114 return cp->length();
2115 }
2116 JVM_END
2117
2118
2119 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2120 {
2121 JVMWrapper("JVM_ConstantPoolGetClassAt");
2122 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2123 bounds_check(cp, index, CHECK_NULL);
2124 constantTag tag = cp->tag_at(index);
2125 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2126 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2127 }
2128 Klass* k = cp->klass_at(index, CHECK_NULL);
2129 return (jclass) JNIHandles::make_local(k->java_mirror());
2130 }
2131 JVM_END
2132
2133 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_NULL);
2138 constantTag tag = cp->tag_at(index);
2139 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2141 }
2142 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2143 if (k == NULL) return NULL;
2144 return (jclass) JNIHandles::make_local(k->java_mirror());
2145 }
2146 JVM_END
2147
2148 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2149 constantTag tag = cp->tag_at(index);
2150 if (!tag.is_method() && !tag.is_interface_method()) {
2151 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2152 }
2153 int klass_ref = cp->uncached_klass_ref_index_at(index);
2154 Klass* k_o;
2155 if (force_resolution) {
2156 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2157 } else {
2158 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2159 if (k_o == NULL) return NULL;
2160 }
2161 instanceKlassHandle k(THREAD, k_o);
2162 Symbol* name = cp->uncached_name_ref_at(index);
2163 Symbol* sig = cp->uncached_signature_ref_at(index);
2164 methodHandle m (THREAD, k->find_method(name, sig));
2165 if (m.is_null()) {
2166 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2167 }
2168 oop method;
2169 if (!m->is_initializer() || m->is_static()) {
2170 method = Reflection::new_method(m, true, true, CHECK_NULL);
2171 } else {
2172 method = Reflection::new_constructor(m, CHECK_NULL);
2173 }
2174 return JNIHandles::make_local(method);
2175 }
2176
2177 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2178 {
2179 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2180 JvmtiVMObjectAllocEventCollector oam;
2181 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2182 bounds_check(cp, index, CHECK_NULL);
2183 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2184 return res;
2185 }
2186 JVM_END
2187
2188 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2191 JvmtiVMObjectAllocEventCollector oam;
2192 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2193 bounds_check(cp, index, CHECK_NULL);
2194 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2195 return res;
2196 }
2197 JVM_END
2198
2199 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2200 constantTag tag = cp->tag_at(index);
2201 if (!tag.is_field()) {
2202 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203 }
2204 int klass_ref = cp->uncached_klass_ref_index_at(index);
2205 Klass* k_o;
2206 if (force_resolution) {
2207 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2208 } else {
2209 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2210 if (k_o == NULL) return NULL;
2211 }
2212 instanceKlassHandle k(THREAD, k_o);
2213 Symbol* name = cp->uncached_name_ref_at(index);
2214 Symbol* sig = cp->uncached_signature_ref_at(index);
2215 fieldDescriptor fd;
2216 Klass* target_klass = k->find_field(name, sig, &fd);
2217 if (target_klass == NULL) {
2218 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2219 }
2220 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2221 return JNIHandles::make_local(field);
2222 }
2223
2224 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2225 {
2226 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2227 JvmtiVMObjectAllocEventCollector oam;
2228 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2229 bounds_check(cp, index, CHECK_NULL);
2230 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2231 return res;
2232 }
2233 JVM_END
2234
2235 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2236 {
2237 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2238 JvmtiVMObjectAllocEventCollector oam;
2239 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2240 bounds_check(cp, index, CHECK_NULL);
2241 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2242 return res;
2243 }
2244 JVM_END
2245
2246 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2247 {
2248 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2249 JvmtiVMObjectAllocEventCollector oam;
2250 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2251 bounds_check(cp, index, CHECK_NULL);
2252 constantTag tag = cp->tag_at(index);
2253 if (!tag.is_field_or_method()) {
2254 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2255 }
2256 int klass_ref = cp->uncached_klass_ref_index_at(index);
2257 Symbol* klass_name = cp->klass_name_at(klass_ref);
2258 Symbol* member_name = cp->uncached_name_ref_at(index);
2259 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2260 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2261 objArrayHandle dest(THREAD, dest_o);
2262 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2263 dest->obj_at_put(0, str());
2264 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2265 dest->obj_at_put(1, str());
2266 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2267 dest->obj_at_put(2, str());
2268 return (jobjectArray) JNIHandles::make_local(dest());
2269 }
2270 JVM_END
2271
2272 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2273 {
2274 JVMWrapper("JVM_ConstantPoolGetIntAt");
2275 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2276 bounds_check(cp, index, CHECK_0);
2277 constantTag tag = cp->tag_at(index);
2278 if (!tag.is_int()) {
2279 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2280 }
2281 return cp->int_at(index);
2282 }
2283 JVM_END
2284
2285 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2286 {
2287 JVMWrapper("JVM_ConstantPoolGetLongAt");
2288 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2289 bounds_check(cp, index, CHECK_(0L));
2290 constantTag tag = cp->tag_at(index);
2291 if (!tag.is_long()) {
2292 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2293 }
2294 return cp->long_at(index);
2295 }
2296 JVM_END
2297
2298 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2299 {
2300 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2301 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2302 bounds_check(cp, index, CHECK_(0.0f));
2303 constantTag tag = cp->tag_at(index);
2304 if (!tag.is_float()) {
2305 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2306 }
2307 return cp->float_at(index);
2308 }
2309 JVM_END
2310
2311 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2312 {
2313 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2314 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2315 bounds_check(cp, index, CHECK_(0.0));
2316 constantTag tag = cp->tag_at(index);
2317 if (!tag.is_double()) {
2318 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2319 }
2320 return cp->double_at(index);
2321 }
2322 JVM_END
2323
2324 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2325 {
2326 JVMWrapper("JVM_ConstantPoolGetStringAt");
2327 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2328 bounds_check(cp, index, CHECK_NULL);
2329 constantTag tag = cp->tag_at(index);
2330 if (!tag.is_string()) {
2331 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2332 }
2333 oop str = cp->string_at(index, CHECK_NULL);
2334 return (jstring) JNIHandles::make_local(str);
2335 }
2336 JVM_END
2337
2338 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2339 {
2340 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2341 JvmtiVMObjectAllocEventCollector oam;
2342 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2343 bounds_check(cp, index, CHECK_NULL);
2344 constantTag tag = cp->tag_at(index);
2345 if (!tag.is_symbol()) {
2346 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2347 }
2348 Symbol* sym = cp->symbol_at(index);
2349 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2350 return (jstring) JNIHandles::make_local(str());
2351 }
2352 JVM_END
2353
2354
2355 // Assertion support. //////////////////////////////////////////////////////////
2356
2357 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2358 JVMWrapper("JVM_DesiredAssertionStatus");
2359 assert(cls != NULL, "bad class");
2360
2361 oop r = JNIHandles::resolve(cls);
2362 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2363 if (java_lang_Class::is_primitive(r)) return false;
2364
2365 Klass* k = java_lang_Class::as_Klass(r);
2366 assert(k->oop_is_instance(), "must be an instance klass");
2367 if (! k->oop_is_instance()) return false;
2368
2369 ResourceMark rm(THREAD);
2370 const char* name = k->name()->as_C_string();
2371 bool system_class = k->class_loader() == NULL;
2372 return JavaAssertions::enabled(name, system_class);
2373
2374 JVM_END
2375
2376
2377 // Return a new AssertionStatusDirectives object with the fields filled in with
2378 // command-line assertion arguments (i.e., -ea, -da).
2379 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2380 JVMWrapper("JVM_AssertionStatusDirectives");
2381 JvmtiVMObjectAllocEventCollector oam;
2382 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2383 return JNIHandles::make_local(env, asd);
2384 JVM_END
2385
2386 // Verification ////////////////////////////////////////////////////////////////////////////////
2387
2388 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2389
2390 // RedefineClasses support: bug 6214132 caused verification to fail.
2391 // All functions from this section should call the jvmtiThreadSate function:
2392 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2393 // The function returns a Klass* of the _scratch_class if the verifier
2394 // was invoked in the middle of the class redefinition.
2395 // Otherwise it returns its argument value which is the _the_class Klass*.
2396 // Please, refer to the description in the jvmtiThreadSate.hpp.
2397
2398 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2399 JVMWrapper("JVM_GetClassNameUTF");
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 return k->name()->as_utf8();
2403 JVM_END
2404
2405
2406 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2407 JVMWrapper("JVM_GetClassCPTypes");
2408 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410 // types will have length zero if this is not an InstanceKlass
2411 // (length is determined by call to JVM_GetClassCPEntriesCount)
2412 if (k->oop_is_instance()) {
2413 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2414 for (int index = cp->length() - 1; index >= 0; index--) {
2415 constantTag tag = cp->tag_at(index);
2416 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2417 }
2418 }
2419 JVM_END
2420
2421
2422 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2423 JVMWrapper("JVM_GetClassCPEntriesCount");
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 if (!k->oop_is_instance())
2427 return 0;
2428 return InstanceKlass::cast(k)->constants()->length();
2429 JVM_END
2430
2431
2432 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2433 JVMWrapper("JVM_GetClassFieldsCount");
2434 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436 if (!k->oop_is_instance())
2437 return 0;
2438 return InstanceKlass::cast(k)->java_fields_count();
2439 JVM_END
2440
2441
2442 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2443 JVMWrapper("JVM_GetClassMethodsCount");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 if (!k->oop_is_instance())
2447 return 0;
2448 return InstanceKlass::cast(k)->methods()->length();
2449 JVM_END
2450
2451
2452 // The following methods, used for the verifier, are never called with
2453 // array klasses, so a direct cast to InstanceKlass is safe.
2454 // Typically, these methods are called in a loop with bounds determined
2455 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2456 // zero for arrays.
2457 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2458 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 int length = method->checked_exceptions_length();
2463 if (length > 0) {
2464 CheckedExceptionElement* table= method->checked_exceptions_start();
2465 for (int i = 0; i < length; i++) {
2466 exceptions[i] = table[i].class_cp_index;
2467 }
2468 }
2469 JVM_END
2470
2471
2472 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2473 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2477 return method->checked_exceptions_length();
2478 JVM_END
2479
2480
2481 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2482 JVMWrapper("JVM_GetMethodIxByteCode");
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2486 memcpy(code, method->code_base(), method->code_size());
2487 JVM_END
2488
2489
2490 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2491 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2494 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2495 return method->code_size();
2496 JVM_END
2497
2498
2499 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2500 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2501 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2503 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2504 ExceptionTable extable(method);
2505 entry->start_pc = extable.start_pc(entry_index);
2506 entry->end_pc = extable.end_pc(entry_index);
2507 entry->handler_pc = extable.handler_pc(entry_index);
2508 entry->catchType = extable.catch_type_index(entry_index);
2509 JVM_END
2510
2511
2512 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2513 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2517 return method->exception_table_length();
2518 JVM_END
2519
2520
2521 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2522 JVMWrapper("JVM_GetMethodIxModifiers");
2523 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2524 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2525 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2526 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2527 JVM_END
2528
2529
2530 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2531 JVMWrapper("JVM_GetFieldIxModifiers");
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2535 JVM_END
2536
2537
2538 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2539 JVMWrapper("JVM_GetMethodIxLocalsCount");
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2543 return method->max_locals();
2544 JVM_END
2545
2546
2547 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2548 JVMWrapper("JVM_GetMethodIxArgsSize");
2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2551 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2552 return method->size_of_parameters();
2553 JVM_END
2554
2555
2556 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2557 JVMWrapper("JVM_GetMethodIxMaxStack");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2561 return method->verifier_max_stack();
2562 JVM_END
2563
2564
2565 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2566 JVMWrapper("JVM_IsConstructorIx");
2567 ResourceMark rm(THREAD);
2568 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2569 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2570 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2571 return method->name() == vmSymbols::object_initializer_name();
2572 JVM_END
2573
2574
2575 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2576 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2577 ResourceMark rm(THREAD);
2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2581 return method->is_overpass();
2582 JVM_END
2583
2584 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2585 JVMWrapper("JVM_GetMethodIxIxUTF");
2586 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2587 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2588 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2589 return method->name()->as_utf8();
2590 JVM_END
2591
2592
2593 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2594 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2595 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2596 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2597 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2598 return method->signature()->as_utf8();
2599 JVM_END
2600
2601 /**
2602 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2603 * read entries in the constant pool. Since the old verifier always
2604 * works on a copy of the code, it will not see any rewriting that
2605 * may possibly occur in the middle of verification. So it is important
2606 * that nothing it calls tries to use the cpCache instead of the raw
2607 * constant pool, so we must use cp->uncached_x methods when appropriate.
2608 */
2609 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2610 JVMWrapper("JVM_GetCPFieldNameUTF");
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2614 switch (cp->tag_at(cp_index).value()) {
2615 case JVM_CONSTANT_Fieldref:
2616 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2617 default:
2618 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2619 }
2620 ShouldNotReachHere();
2621 return NULL;
2622 JVM_END
2623
2624
2625 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2626 JVMWrapper("JVM_GetCPMethodNameUTF");
2627 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2628 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2629 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2630 switch (cp->tag_at(cp_index).value()) {
2631 case JVM_CONSTANT_InterfaceMethodref:
2632 case JVM_CONSTANT_Methodref:
2633 case JVM_CONSTANT_NameAndType: // for invokedynamic
2634 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2635 default:
2636 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2637 }
2638 ShouldNotReachHere();
2639 return NULL;
2640 JVM_END
2641
2642
2643 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2644 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2646 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2647 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2648 switch (cp->tag_at(cp_index).value()) {
2649 case JVM_CONSTANT_InterfaceMethodref:
2650 case JVM_CONSTANT_Methodref:
2651 case JVM_CONSTANT_NameAndType: // for invokedynamic
2652 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2653 default:
2654 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2655 }
2656 ShouldNotReachHere();
2657 return NULL;
2658 JVM_END
2659
2660
2661 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2662 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2663 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2664 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2665 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2666 switch (cp->tag_at(cp_index).value()) {
2667 case JVM_CONSTANT_Fieldref:
2668 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2669 default:
2670 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2671 }
2672 ShouldNotReachHere();
2673 return NULL;
2674 JVM_END
2675
2676
2677 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2678 JVMWrapper("JVM_GetCPClassNameUTF");
2679 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2680 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2681 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2682 Symbol* classname = cp->klass_name_at(cp_index);
2683 return classname->as_utf8();
2684 JVM_END
2685
2686
2687 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2688 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2689 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2690 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2691 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2692 switch (cp->tag_at(cp_index).value()) {
2693 case JVM_CONSTANT_Fieldref: {
2694 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2695 Symbol* classname = cp->klass_name_at(class_index);
2696 return classname->as_utf8();
2697 }
2698 default:
2699 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2700 }
2701 ShouldNotReachHere();
2702 return NULL;
2703 JVM_END
2704
2705
2706 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2707 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2708 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2709 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2710 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2711 switch (cp->tag_at(cp_index).value()) {
2712 case JVM_CONSTANT_Methodref:
2713 case JVM_CONSTANT_InterfaceMethodref: {
2714 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2715 Symbol* classname = cp->klass_name_at(class_index);
2716 return classname->as_utf8();
2717 }
2718 default:
2719 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2720 }
2721 ShouldNotReachHere();
2722 return NULL;
2723 JVM_END
2724
2725
2726 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2727 JVMWrapper("JVM_GetCPFieldModifiers");
2728 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2729 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2730 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2731 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2732 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2733 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2734 switch (cp->tag_at(cp_index).value()) {
2735 case JVM_CONSTANT_Fieldref: {
2736 Symbol* name = cp->uncached_name_ref_at(cp_index);
2737 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2738 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2739 if (fs.name() == name && fs.signature() == signature) {
2740 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2741 }
2742 }
2743 return -1;
2744 }
2745 default:
2746 fatal("JVM_GetCPFieldModifiers: illegal constant");
2747 }
2748 ShouldNotReachHere();
2749 return 0;
2750 JVM_END
2751
2752
2753 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2754 JVMWrapper("JVM_GetCPMethodModifiers");
2755 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2756 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2757 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2758 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2759 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2760 switch (cp->tag_at(cp_index).value()) {
2761 case JVM_CONSTANT_Methodref:
2762 case JVM_CONSTANT_InterfaceMethodref: {
2763 Symbol* name = cp->uncached_name_ref_at(cp_index);
2764 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2765 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2766 int methods_count = methods->length();
2767 for (int i = 0; i < methods_count; i++) {
2768 Method* method = methods->at(i);
2769 if (method->name() == name && method->signature() == signature) {
2770 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2771 }
2772 }
2773 return -1;
2774 }
2775 default:
2776 fatal("JVM_GetCPMethodModifiers: illegal constant");
2777 }
2778 ShouldNotReachHere();
2779 return 0;
2780 JVM_END
2781
2782
2783 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2784
2785 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2786 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2787 JVM_END
2788
2789
2790 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2791 JVMWrapper("JVM_IsSameClassPackage");
2792 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2793 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2794 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2795 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2796 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2797 JVM_END
2798
2799
2800 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2801
2802 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2803 JVMWrapper2("JVM_Open (%s)", fname);
2804
2805 //%note jvm_r6
2806 int result = os::open(fname, flags, mode);
2807 if (result >= 0) {
2808 return result;
2809 } else {
2810 switch(errno) {
2811 case EEXIST:
2812 return JVM_EEXIST;
2813 default:
2814 return -1;
2815 }
2816 }
2817 JVM_END
2818
2819
2820 JVM_LEAF(jint, JVM_Close(jint fd))
2821 JVMWrapper2("JVM_Close (0x%x)", fd);
2822 //%note jvm_r6
2823 return os::close(fd);
2824 JVM_END
2825
2826
2827 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2828 JVMWrapper2("JVM_Read (0x%x)", fd);
2829
2830 //%note jvm_r6
2831 return (jint)os::restartable_read(fd, buf, nbytes);
2832 JVM_END
2833
2834
2835 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2836 JVMWrapper2("JVM_Write (0x%x)", fd);
2837
2838 //%note jvm_r6
2839 return (jint)os::write(fd, buf, nbytes);
2840 JVM_END
2841
2842
2843 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2844 JVMWrapper2("JVM_Available (0x%x)", fd);
2845 //%note jvm_r6
2846 return os::available(fd, pbytes);
2847 JVM_END
2848
2849
2850 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2851 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2852 //%note jvm_r6
2853 return os::lseek(fd, offset, whence);
2854 JVM_END
2855
2856
2857 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2858 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2859 return os::ftruncate(fd, length);
2860 JVM_END
2861
2862
2863 JVM_LEAF(jint, JVM_Sync(jint fd))
2864 JVMWrapper2("JVM_Sync (0x%x)", fd);
2865 //%note jvm_r6
2866 return os::fsync(fd);
2867 JVM_END
2868
2869
2870 // Printing support //////////////////////////////////////////////////
2871 extern "C" {
2872
2873 ATTRIBUTE_PRINTF(3, 0)
2874 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2875 // see bug 4399518, 4417214
2876 if ((intptr_t)count <= 0) return -1;
2877 return vsnprintf(str, count, fmt, args);
2878 }
2879
2880 ATTRIBUTE_PRINTF(3, 0)
2881 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2882 va_list args;
2883 int len;
2884 va_start(args, fmt);
2885 len = jio_vsnprintf(str, count, fmt, args);
2886 va_end(args);
2887 return len;
2888 }
2889
2890 ATTRIBUTE_PRINTF(2,3)
2891 int jio_fprintf(FILE* f, const char *fmt, ...) {
2892 int len;
2893 va_list args;
2894 va_start(args, fmt);
2895 len = jio_vfprintf(f, fmt, args);
2896 va_end(args);
2897 return len;
2898 }
2899
2900 ATTRIBUTE_PRINTF(2, 0)
2901 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2902 if (Arguments::vfprintf_hook() != NULL) {
2903 return Arguments::vfprintf_hook()(f, fmt, args);
2904 } else {
2905 return vfprintf(f, fmt, args);
2906 }
2907 }
2908
2909 ATTRIBUTE_PRINTF(1, 2)
2910 JNIEXPORT int jio_printf(const char *fmt, ...) {
2911 int len;
2912 va_list args;
2913 va_start(args, fmt);
2914 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2915 va_end(args);
2916 return len;
2917 }
2918
2919
2920 // HotSpot specific jio method
2921 void jio_print(const char* s) {
2922 // Try to make this function as atomic as possible.
2923 if (Arguments::vfprintf_hook() != NULL) {
2924 jio_fprintf(defaultStream::output_stream(), "%s", s);
2925 } else {
2926 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2927 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2928 }
2929 }
2930
2931 } // Extern C
2932
2933 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2934
2935 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2936 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2937 // OSThread objects. The exception to this rule is when the target object is the thread
2938 // doing the operation, in which case we know that the thread won't exit until the
2939 // operation is done (all exits being voluntary). There are a few cases where it is
2940 // rather silly to do operations on yourself, like resuming yourself or asking whether
2941 // you are alive. While these can still happen, they are not subject to deadlocks if
2942 // the lock is held while the operation occurs (this is not the case for suspend, for
2943 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2944 // implementation is local to this file, we always lock Threads_lock for that one.
2945
2946 static void thread_entry(JavaThread* thread, TRAPS) {
2947 HandleMark hm(THREAD);
2948 Handle obj(THREAD, thread->threadObj());
2949 JavaValue result(T_VOID);
2950 JavaCalls::call_virtual(&result,
2951 obj,
2952 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2953 vmSymbols::run_method_name(),
2954 vmSymbols::void_method_signature(),
2955 THREAD);
2956 }
2957
2958
2959 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2960 JVMWrapper("JVM_StartThread");
2961 JavaThread *native_thread = NULL;
2962
2963 // We cannot hold the Threads_lock when we throw an exception,
2964 // due to rank ordering issues. Example: we might need to grab the
2965 // Heap_lock while we construct the exception.
2966 bool throw_illegal_thread_state = false;
2967
2968 // We must release the Threads_lock before we can post a jvmti event
2969 // in Thread::start.
2970 {
2971 // Ensure that the C++ Thread and OSThread structures aren't freed before
2972 // we operate.
2973 MutexLocker mu(Threads_lock);
2974
2975 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2976 // re-starting an already started thread, so we should usually find
2977 // that the JavaThread is null. However for a JNI attached thread
2978 // there is a small window between the Thread object being created
2979 // (with its JavaThread set) and the update to its threadStatus, so we
2980 // have to check for this
2981 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2982 throw_illegal_thread_state = true;
2983 } else {
2984 // We could also check the stillborn flag to see if this thread was already stopped, but
2985 // for historical reasons we let the thread detect that itself when it starts running
2986
2987 jlong size =
2988 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2989 // Allocate the C++ Thread structure and create the native thread. The
2990 // stack size retrieved from java is signed, but the constructor takes
2991 // size_t (an unsigned type), so avoid passing negative values which would
2992 // result in really large stacks.
2993 size_t sz = size > 0 ? (size_t) size : 0;
2994 native_thread = new JavaThread(&thread_entry, sz);
2995
2996 // At this point it may be possible that no osthread was created for the
2997 // JavaThread due to lack of memory. Check for this situation and throw
2998 // an exception if necessary. Eventually we may want to change this so
2999 // that we only grab the lock if the thread was created successfully -
3000 // then we can also do this check and throw the exception in the
3001 // JavaThread constructor.
3002 if (native_thread->osthread() != NULL) {
3003 // Note: the current thread is not being used within "prepare".
3004 native_thread->prepare(jthread);
3005 }
3006 }
3007 }
3008
3009 if (throw_illegal_thread_state) {
3010 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3011 }
3012
3013 assert(native_thread != NULL, "Starting null thread?");
3014
3015 if (native_thread->osthread() == NULL) {
3016 // No one should hold a reference to the 'native_thread'.
3017 delete native_thread;
3018 if (JvmtiExport::should_post_resource_exhausted()) {
3019 JvmtiExport::post_resource_exhausted(
3020 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3021 "unable to create new native thread");
3022 }
3023 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3024 "unable to create new native thread");
3025 }
3026
3027 Thread::start(native_thread);
3028
3029 JVM_END
3030
3031 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3032 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3033 // but is thought to be reliable and simple. In the case, where the receiver is the
3034 // same thread as the sender, no safepoint is needed.
3035 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3036 JVMWrapper("JVM_StopThread");
3037
3038 oop java_throwable = JNIHandles::resolve(throwable);
3039 if (java_throwable == NULL) {
3040 THROW(vmSymbols::java_lang_NullPointerException());
3041 }
3042 oop java_thread = JNIHandles::resolve_non_null(jthread);
3043 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3044 Events::log_exception(JavaThread::current(),
3045 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3046 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3047 // First check if thread is alive
3048 if (receiver != NULL) {
3049 // Check if exception is getting thrown at self (use oop equality, since the
3050 // target object might exit)
3051 if (java_thread == thread->threadObj()) {
3052 THROW_OOP(java_throwable);
3053 } else {
3054 // Enques a VM_Operation to stop all threads and then deliver the exception...
3055 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3056 }
3057 }
3058 else {
3059 // Either:
3060 // - target thread has not been started before being stopped, or
3061 // - target thread already terminated
3062 // We could read the threadStatus to determine which case it is
3063 // but that is overkill as it doesn't matter. We must set the
3064 // stillborn flag for the first case, and if the thread has already
3065 // exited setting this flag has no affect
3066 java_lang_Thread::set_stillborn(java_thread);
3067 }
3068 JVM_END
3069
3070
3071 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3072 JVMWrapper("JVM_IsThreadAlive");
3073
3074 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3075 return java_lang_Thread::is_alive(thread_oop);
3076 JVM_END
3077
3078
3079 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3080 JVMWrapper("JVM_SuspendThread");
3081 oop java_thread = JNIHandles::resolve_non_null(jthread);
3082 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3083
3084 if (receiver != NULL) {
3085 // thread has run and has not exited (still on threads list)
3086
3087 {
3088 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3089 if (receiver->is_external_suspend()) {
3090 // Don't allow nested external suspend requests. We can't return
3091 // an error from this interface so just ignore the problem.
3092 return;
3093 }
3094 if (receiver->is_exiting()) { // thread is in the process of exiting
3095 return;
3096 }
3097 receiver->set_external_suspend();
3098 }
3099
3100 // java_suspend() will catch threads in the process of exiting
3101 // and will ignore them.
3102 receiver->java_suspend();
3103
3104 // It would be nice to have the following assertion in all the
3105 // time, but it is possible for a racing resume request to have
3106 // resumed this thread right after we suspended it. Temporarily
3107 // enable this assertion if you are chasing a different kind of
3108 // bug.
3109 //
3110 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3111 // receiver->is_being_ext_suspended(), "thread is not suspended");
3112 }
3113 JVM_END
3114
3115
3116 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3117 JVMWrapper("JVM_ResumeThread");
3118 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3119 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3120 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3121 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3122 // looks at it.
3123 MutexLocker ml(Threads_lock);
3124 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3125 if (thr != NULL) {
3126 // the thread has run and is not in the process of exiting
3127 thr->java_resume();
3128 }
3129 JVM_END
3130
3131
3132 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3133 JVMWrapper("JVM_SetThreadPriority");
3134 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3135 MutexLocker ml(Threads_lock);
3136 oop java_thread = JNIHandles::resolve_non_null(jthread);
3137 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3138 JavaThread* thr = java_lang_Thread::thread(java_thread);
3139 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3140 Thread::set_priority(thr, (ThreadPriority)prio);
3141 }
3142 JVM_END
3143
3144
3145 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3146 JVMWrapper("JVM_Yield");
3147 if (os::dont_yield()) return;
3148 #ifndef USDT2
3149 HS_DTRACE_PROBE0(hotspot, thread__yield);
3150 #else /* USDT2 */
3151 HOTSPOT_THREAD_YIELD();
3152 #endif /* USDT2 */
3153 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3154 // Critical for similar threading behaviour
3155 if (ConvertYieldToSleep) {
3156 os::sleep(thread, MinSleepInterval, false);
3157 } else {
3158 os::yield();
3159 }
3160 JVM_END
3161
3162
3163 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3164 JVMWrapper("JVM_Sleep");
3165
3166 if (millis < 0) {
3167 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3168 }
3169
3170 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3171 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3172 }
3173
3174 // Save current thread state and restore it at the end of this block.
3175 // And set new thread state to SLEEPING.
3176 JavaThreadSleepState jtss(thread);
3177
3178 #ifndef USDT2
3179 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3180 #else /* USDT2 */
3181 HOTSPOT_THREAD_SLEEP_BEGIN(
3182 millis);
3183 #endif /* USDT2 */
3184
3185 EventThreadSleep event;
3186
3187 if (millis == 0) {
3188 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3189 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3190 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3191 // for SOLARIS
3192 if (ConvertSleepToYield) {
3193 os::yield();
3194 } else {
3195 ThreadState old_state = thread->osthread()->get_state();
3196 thread->osthread()->set_state(SLEEPING);
3197 os::sleep(thread, MinSleepInterval, false);
3198 thread->osthread()->set_state(old_state);
3199 }
3200 } else {
3201 ThreadState old_state = thread->osthread()->get_state();
3202 thread->osthread()->set_state(SLEEPING);
3203 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3204 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3205 // us while we were sleeping. We do not overwrite those.
3206 if (!HAS_PENDING_EXCEPTION) {
3207 if (event.should_commit()) {
3208 event.set_time(millis);
3209 event.commit();
3210 }
3211 #ifndef USDT2
3212 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3213 #else /* USDT2 */
3214 HOTSPOT_THREAD_SLEEP_END(
3215 1);
3216 #endif /* USDT2 */
3217 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3218 // to properly restore the thread state. That's likely wrong.
3219 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3220 }
3221 }
3222 thread->osthread()->set_state(old_state);
3223 }
3224 if (event.should_commit()) {
3225 event.set_time(millis);
3226 event.commit();
3227 }
3228 #ifndef USDT2
3229 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3230 #else /* USDT2 */
3231 HOTSPOT_THREAD_SLEEP_END(
3232 0);
3233 #endif /* USDT2 */
3234 JVM_END
3235
3236 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3237 JVMWrapper("JVM_CurrentThread");
3238 oop jthread = thread->threadObj();
3239 assert (thread != NULL, "no current thread!");
3240 return JNIHandles::make_local(env, jthread);
3241 JVM_END
3242
3243
3244 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3245 JVMWrapper("JVM_CountStackFrames");
3246
3247 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3248 oop java_thread = JNIHandles::resolve_non_null(jthread);
3249 bool throw_illegal_thread_state = false;
3250 int count = 0;
3251
3252 {
3253 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3254 // We need to re-resolve the java_thread, since a GC might have happened during the
3255 // acquire of the lock
3256 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3257
3258 if (thr == NULL) {
3259 // do nothing
3260 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3261 // Check whether this java thread has been suspended already. If not, throws
3262 // IllegalThreadStateException. We defer to throw that exception until
3263 // Threads_lock is released since loading exception class has to leave VM.
3264 // The correct way to test a thread is actually suspended is
3265 // wait_for_ext_suspend_completion(), but we can't call that while holding
3266 // the Threads_lock. The above tests are sufficient for our purposes
3267 // provided the walkability of the stack is stable - which it isn't
3268 // 100% but close enough for most practical purposes.
3269 throw_illegal_thread_state = true;
3270 } else {
3271 // Count all java activation, i.e., number of vframes
3272 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3273 // Native frames are not counted
3274 if (!vfst.method()->is_native()) count++;
3275 }
3276 }
3277 }
3278
3279 if (throw_illegal_thread_state) {
3280 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3281 "this thread is not suspended");
3282 }
3283 return count;
3284 JVM_END
3285
3286 // Consider: A better way to implement JVM_Interrupt() is to acquire
3287 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3288 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3289 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3290 // outside the critical section. Threads_lock is hot so we want to minimize
3291 // the hold-time. A cleaner interface would be to decompose interrupt into
3292 // two steps. The 1st phase, performed under Threads_lock, would return
3293 // a closure that'd be invoked after Threads_lock was dropped.
3294 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3295 // admit spurious wakeups.
3296
3297 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3298 JVMWrapper("JVM_Interrupt");
3299
3300 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3301 oop java_thread = JNIHandles::resolve_non_null(jthread);
3302 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3303 // We need to re-resolve the java_thread, since a GC might have happened during the
3304 // acquire of the lock
3305 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3306 if (thr != NULL) {
3307 Thread::interrupt(thr);
3308 }
3309 JVM_END
3310
3311
3312 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3313 JVMWrapper("JVM_IsInterrupted");
3314
3315 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3316 oop java_thread = JNIHandles::resolve_non_null(jthread);
3317 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3318 // We need to re-resolve the java_thread, since a GC might have happened during the
3319 // acquire of the lock
3320 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3321 if (thr == NULL) {
3322 return JNI_FALSE;
3323 } else {
3324 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3325 }
3326 JVM_END
3327
3328
3329 // Return true iff the current thread has locked the object passed in
3330
3331 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3332 JVMWrapper("JVM_HoldsLock");
3333 assert(THREAD->is_Java_thread(), "sanity check");
3334 if (obj == NULL) {
3335 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3336 }
3337 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3338 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3339 JVM_END
3340
3341
3342 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3343 JVMWrapper("JVM_DumpAllStacks");
3344 VM_PrintThreads op;
3345 VMThread::execute(&op);
3346 if (JvmtiExport::should_post_data_dump()) {
3347 JvmtiExport::post_data_dump();
3348 }
3349 JVM_END
3350
3351 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3352 JVMWrapper("JVM_SetNativeThreadName");
3353 ResourceMark rm(THREAD);
3354 oop java_thread = JNIHandles::resolve_non_null(jthread);
3355 JavaThread* thr = java_lang_Thread::thread(java_thread);
3356 // Thread naming only supported for the current thread, doesn't work for
3357 // target threads.
3358 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3359 // we don't set the name of an attached thread to avoid stepping
3360 // on other programs
3361 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3362 os::set_native_thread_name(thread_name);
3363 }
3364 JVM_END
3365
3366 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3367
3368 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3369 assert(jthread->is_Java_thread(), "must be a Java thread");
3370 if (jthread->privileged_stack_top() == NULL) return false;
3371 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3372 oop loader = jthread->privileged_stack_top()->class_loader();
3373 if (loader == NULL) return true;
3374 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3375 if (trusted) return true;
3376 }
3377 return false;
3378 }
3379
3380 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3381 JVMWrapper("JVM_CurrentLoadedClass");
3382 ResourceMark rm(THREAD);
3383
3384 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3385 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3386 bool trusted = is_trusted_frame(thread, &vfst);
3387 if (trusted) return NULL;
3388
3389 Method* m = vfst.method();
3390 if (!m->is_native()) {
3391 InstanceKlass* holder = m->method_holder();
3392 oop loader = holder->class_loader();
3393 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3394 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3395 }
3396 }
3397 }
3398 return NULL;
3399 JVM_END
3400
3401
3402 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3403 JVMWrapper("JVM_CurrentClassLoader");
3404 ResourceMark rm(THREAD);
3405
3406 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3407
3408 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3409 bool trusted = is_trusted_frame(thread, &vfst);
3410 if (trusted) return NULL;
3411
3412 Method* m = vfst.method();
3413 if (!m->is_native()) {
3414 InstanceKlass* holder = m->method_holder();
3415 assert(holder->is_klass(), "just checking");
3416 oop loader = holder->class_loader();
3417 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3418 return JNIHandles::make_local(env, loader);
3419 }
3420 }
3421 }
3422 return NULL;
3423 JVM_END
3424
3425
3426 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3427 JVMWrapper("JVM_GetClassContext");
3428 ResourceMark rm(THREAD);
3429 JvmtiVMObjectAllocEventCollector oam;
3430 vframeStream vfst(thread);
3431
3432 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3433 // This must only be called from SecurityManager.getClassContext
3434 Method* m = vfst.method();
3435 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3436 m->name() == vmSymbols::getClassContext_name() &&
3437 m->signature() == vmSymbols::void_class_array_signature())) {
3438 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3439 }
3440 }
3441
3442 // Collect method holders
3443 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3444 for (; !vfst.at_end(); vfst.security_next()) {
3445 Method* m = vfst.method();
3446 // Native frames are not returned
3447 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3448 Klass* holder = m->method_holder();
3449 assert(holder->is_klass(), "just checking");
3450 klass_array->append(holder);
3451 }
3452 }
3453
3454 // Create result array of type [Ljava/lang/Class;
3455 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3456 // Fill in mirrors corresponding to method holders
3457 for (int i = 0; i < klass_array->length(); i++) {
3458 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3459 }
3460
3461 return (jobjectArray) JNIHandles::make_local(env, result);
3462 JVM_END
3463
3464
3465 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3466 JVMWrapper("JVM_ClassDepth");
3467 ResourceMark rm(THREAD);
3468 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3469 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3470
3471 const char* str = java_lang_String::as_utf8_string(class_name_str());
3472 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3473 if (class_name_sym == NULL) {
3474 return -1;
3475 }
3476
3477 int depth = 0;
3478
3479 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3480 if (!vfst.method()->is_native()) {
3481 InstanceKlass* holder = vfst.method()->method_holder();
3482 assert(holder->is_klass(), "just checking");
3483 if (holder->name() == class_name_sym) {
3484 return depth;
3485 }
3486 depth++;
3487 }
3488 }
3489 return -1;
3490 JVM_END
3491
3492
3493 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3494 JVMWrapper("JVM_ClassLoaderDepth");
3495 ResourceMark rm(THREAD);
3496 int depth = 0;
3497 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3498 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3499 bool trusted = is_trusted_frame(thread, &vfst);
3500 if (trusted) return -1;
3501
3502 Method* m = vfst.method();
3503 if (!m->is_native()) {
3504 InstanceKlass* holder = m->method_holder();
3505 assert(holder->is_klass(), "just checking");
3506 oop loader = holder->class_loader();
3507 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3508 return depth;
3509 }
3510 depth++;
3511 }
3512 }
3513 return -1;
3514 JVM_END
3515
3516
3517 // java.lang.Package ////////////////////////////////////////////////////////////////
3518
3519
3520 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3521 JVMWrapper("JVM_GetSystemPackage");
3522 ResourceMark rm(THREAD);
3523 JvmtiVMObjectAllocEventCollector oam;
3524 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3525 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3526 return (jstring) JNIHandles::make_local(result);
3527 JVM_END
3528
3529
3530 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3531 JVMWrapper("JVM_GetSystemPackages");
3532 JvmtiVMObjectAllocEventCollector oam;
3533 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3534 return (jobjectArray) JNIHandles::make_local(result);
3535 JVM_END
3536
3537
3538 // ObjectInputStream ///////////////////////////////////////////////////////////////
3539
3540 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3541 if (current_class == NULL) {
3542 return true;
3543 }
3544 if ((current_class == field_class) || access.is_public()) {
3545 return true;
3546 }
3547
3548 if (access.is_protected()) {
3549 // See if current_class is a subclass of field_class
3550 if (current_class->is_subclass_of(field_class)) {
3551 return true;
3552 }
3553 }
3554
3555 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3556 }
3557
3558
3559 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3560 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3561 JVMWrapper("JVM_AllocateNewObject");
3562 JvmtiVMObjectAllocEventCollector oam;
3563 // Receiver is not used
3564 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3565 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3566
3567 // Cannot instantiate primitive types
3568 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3569 ResourceMark rm(THREAD);
3570 THROW_0(vmSymbols::java_lang_InvalidClassException());
3571 }
3572
3573 // Arrays not allowed here, must use JVM_AllocateNewArray
3574 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3575 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3576 ResourceMark rm(THREAD);
3577 THROW_0(vmSymbols::java_lang_InvalidClassException());
3578 }
3579
3580 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3581 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3582
3583 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3584
3585 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3586 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3587
3588 // Make sure klass is initialized, since we are about to instantiate one of them.
3589 curr_klass->initialize(CHECK_NULL);
3590
3591 methodHandle m (THREAD,
3592 init_klass->find_method(vmSymbols::object_initializer_name(),
3593 vmSymbols::void_method_signature()));
3594 if (m.is_null()) {
3595 ResourceMark rm(THREAD);
3596 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3597 Method::name_and_sig_as_C_string(init_klass(),
3598 vmSymbols::object_initializer_name(),
3599 vmSymbols::void_method_signature()));
3600 }
3601
3602 if (curr_klass == init_klass && !m->is_public()) {
3603 // Calling the constructor for class 'curr_klass'.
3604 // Only allow calls to a public no-arg constructor.
3605 // This path corresponds to creating an Externalizable object.
3606 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3607 }
3608
3609 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3610 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3611 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3612 }
3613
3614 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3615 // Call constructor m. This might call a constructor higher up in the hierachy
3616 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3617
3618 return JNIHandles::make_local(obj());
3619 JVM_END
3620
3621
3622 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3623 JVMWrapper("JVM_AllocateNewArray");
3624 JvmtiVMObjectAllocEventCollector oam;
3625 oop mirror = JNIHandles::resolve_non_null(currClass);
3626
3627 if (java_lang_Class::is_primitive(mirror)) {
3628 THROW_0(vmSymbols::java_lang_InvalidClassException());
3629 }
3630 Klass* k = java_lang_Class::as_Klass(mirror);
3631 oop result;
3632
3633 if (k->oop_is_typeArray()) {
3634 // typeArray
3635 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3636 } else if (k->oop_is_objArray()) {
3637 // objArray
3638 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3639 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3640 result = oak->allocate(length, CHECK_NULL);
3641 } else {
3642 THROW_0(vmSymbols::java_lang_InvalidClassException());
3643 }
3644 return JNIHandles::make_local(env, result);
3645 JVM_END
3646
3647
3648 // Return the first non-null class loader up the execution stack, or null
3649 // if only code from the null class loader is on the stack.
3650
3651 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3652 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3653 // UseNewReflection
3654 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3655 oop loader = vfst.method()->method_holder()->class_loader();
3656 if (loader != NULL) {
3657 return JNIHandles::make_local(env, loader);
3658 }
3659 }
3660 return NULL;
3661 JVM_END
3662
3663
3664 // Load a class relative to the most recent class on the stack with a non-null
3665 // classloader.
3666 // This function has been deprecated and should not be considered part of the
3667 // specified JVM interface.
3668
3669 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3670 jclass currClass, jstring currClassName))
3671 JVMWrapper("JVM_LoadClass0");
3672 // Receiver is not used
3673 ResourceMark rm(THREAD);
3674
3675 // Class name argument is not guaranteed to be in internal format
3676 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3677 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3678
3679 const char* str = java_lang_String::as_utf8_string(string());
3680
3681 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3682 // It's impossible to create this class; the name cannot fit
3683 // into the constant pool.
3684 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3685 }
3686
3687 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3688 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3689 // Find the most recent class on the stack with a non-null classloader
3690 oop loader = NULL;
3691 oop protection_domain = NULL;
3692 if (curr_klass.is_null()) {
3693 for (vframeStream vfst(thread);
3694 !vfst.at_end() && loader == NULL;
3695 vfst.next()) {
3696 if (!vfst.method()->is_native()) {
3697 InstanceKlass* holder = vfst.method()->method_holder();
3698 loader = holder->class_loader();
3699 protection_domain = holder->protection_domain();
3700 }
3701 }
3702 } else {
3703 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3704 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3705 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3706 }
3707 Handle h_loader(THREAD, loader);
3708 Handle h_prot (THREAD, protection_domain);
3709 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3710 false, thread);
3711 if (TraceClassResolution && result != NULL) {
3712 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3713 }
3714 return result;
3715 JVM_END
3716
3717
3718 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3719
3720
3721 // resolve array handle and check arguments
3722 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3723 if (arr == NULL) {
3724 THROW_0(vmSymbols::java_lang_NullPointerException());
3725 }
3726 oop a = JNIHandles::resolve_non_null(arr);
3727 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3728 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3729 }
3730 return arrayOop(a);
3731 }
3732
3733
3734 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3735 JVMWrapper("JVM_GetArrayLength");
3736 arrayOop a = check_array(env, arr, false, CHECK_0);
3737 return a->length();
3738 JVM_END
3739
3740
3741 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3742 JVMWrapper("JVM_Array_Get");
3743 JvmtiVMObjectAllocEventCollector oam;
3744 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3745 jvalue value;
3746 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3747 oop box = Reflection::box(&value, type, CHECK_NULL);
3748 return JNIHandles::make_local(env, box);
3749 JVM_END
3750
3751
3752 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3753 JVMWrapper("JVM_GetPrimitiveArrayElement");
3754 jvalue value;
3755 value.i = 0; // to initialize value before getting used in CHECK
3756 arrayOop a = check_array(env, arr, true, CHECK_(value));
3757 assert(a->is_typeArray(), "just checking");
3758 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3759 BasicType wide_type = (BasicType) wCode;
3760 if (type != wide_type) {
3761 Reflection::widen(&value, type, wide_type, CHECK_(value));
3762 }
3763 return value;
3764 JVM_END
3765
3766
3767 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3768 JVMWrapper("JVM_SetArrayElement");
3769 arrayOop a = check_array(env, arr, false, CHECK);
3770 oop box = JNIHandles::resolve(val);
3771 jvalue value;
3772 value.i = 0; // to initialize value before getting used in CHECK
3773 BasicType value_type;
3774 if (a->is_objArray()) {
3775 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3776 value_type = Reflection::unbox_for_regular_object(box, &value);
3777 } else {
3778 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3779 }
3780 Reflection::array_set(&value, a, index, value_type, CHECK);
3781 JVM_END
3782
3783
3784 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3785 JVMWrapper("JVM_SetPrimitiveArrayElement");
3786 arrayOop a = check_array(env, arr, true, CHECK);
3787 assert(a->is_typeArray(), "just checking");
3788 BasicType value_type = (BasicType) vCode;
3789 Reflection::array_set(&v, a, index, value_type, CHECK);
3790 JVM_END
3791
3792
3793 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3794 JVMWrapper("JVM_NewArray");
3795 JvmtiVMObjectAllocEventCollector oam;
3796 oop element_mirror = JNIHandles::resolve(eltClass);
3797 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3798 return JNIHandles::make_local(env, result);
3799 JVM_END
3800
3801
3802 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3803 JVMWrapper("JVM_NewMultiArray");
3804 JvmtiVMObjectAllocEventCollector oam;
3805 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3806 oop element_mirror = JNIHandles::resolve(eltClass);
3807 assert(dim_array->is_typeArray(), "just checking");
3808 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3809 return JNIHandles::make_local(env, result);
3810 JVM_END
3811
3812
3813 // Networking library support ////////////////////////////////////////////////////////////////////
3814
3815 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3816 JVMWrapper("JVM_InitializeSocketLibrary");
3817 return 0;
3818 JVM_END
3819
3820
3821 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3822 JVMWrapper("JVM_Socket");
3823 return os::socket(domain, type, protocol);
3824 JVM_END
3825
3826
3827 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3828 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3829 //%note jvm_r6
3830 return os::socket_close(fd);
3831 JVM_END
3832
3833
3834 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3835 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3836 //%note jvm_r6
3837 return os::socket_shutdown(fd, howto);
3838 JVM_END
3839
3840
3841 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3842 JVMWrapper2("JVM_Recv (0x%x)", fd);
3843 //%note jvm_r6
3844 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3845 JVM_END
3846
3847
3848 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3849 JVMWrapper2("JVM_Send (0x%x)", fd);
3850 //%note jvm_r6
3851 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3852 JVM_END
3853
3854
3855 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3856 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3857 //%note jvm_r6
3858 return os::timeout(fd, timeout);
3859 JVM_END
3860
3861
3862 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3863 JVMWrapper2("JVM_Listen (0x%x)", fd);
3864 //%note jvm_r6
3865 return os::listen(fd, count);
3866 JVM_END
3867
3868
3869 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3870 JVMWrapper2("JVM_Connect (0x%x)", fd);
3871 //%note jvm_r6
3872 return os::connect(fd, him, (socklen_t)len);
3873 JVM_END
3874
3875
3876 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3877 JVMWrapper2("JVM_Bind (0x%x)", fd);
3878 //%note jvm_r6
3879 return os::bind(fd, him, (socklen_t)len);
3880 JVM_END
3881
3882
3883 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3884 JVMWrapper2("JVM_Accept (0x%x)", fd);
3885 //%note jvm_r6
3886 socklen_t socklen = (socklen_t)(*len);
3887 jint result = os::accept(fd, him, &socklen);
3888 *len = (jint)socklen;
3889 return result;
3890 JVM_END
3891
3892
3893 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3894 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3895 //%note jvm_r6
3896 socklen_t socklen = (socklen_t)(*fromlen);
3897 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3898 *fromlen = (int)socklen;
3899 return result;
3900 JVM_END
3901
3902
3903 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3904 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3905 //%note jvm_r6
3906 socklen_t socklen = (socklen_t)(*len);
3907 jint result = os::get_sock_name(fd, him, &socklen);
3908 *len = (int)socklen;
3909 return result;
3910 JVM_END
3911
3912
3913 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3914 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3915 //%note jvm_r6
3916 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3917 JVM_END
3918
3919
3920 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3921 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3922 //%note jvm_r6
3923 return os::socket_available(fd, pbytes);
3924 JVM_END
3925
3926
3927 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3928 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3929 //%note jvm_r6
3930 socklen_t socklen = (socklen_t)(*optlen);
3931 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3932 *optlen = (int)socklen;
3933 return result;
3934 JVM_END
3935
3936
3937 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3938 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3939 //%note jvm_r6
3940 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3941 JVM_END
3942
3943
3944 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3945 JVMWrapper("JVM_GetHostName");
3946 return os::get_host_name(name, namelen);
3947 JVM_END
3948
3949
3950 // Library support ///////////////////////////////////////////////////////////////////////////
3951
3952 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3953 //%note jvm_ct
3954 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3955 char ebuf[1024];
3956 void *load_result;
3957 {
3958 ThreadToNativeFromVM ttnfvm(thread);
3959 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3960 }
3961 if (load_result == NULL) {
3962 char msg[1024];
3963 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3964 // Since 'ebuf' may contain a string encoded using
3965 // platform encoding scheme, we need to pass
3966 // Exceptions::unsafe_to_utf8 to the new_exception method
3967 // as the last argument. See bug 6367357.
3968 Handle h_exception =
3969 Exceptions::new_exception(thread,
3970 vmSymbols::java_lang_UnsatisfiedLinkError(),
3971 msg, Exceptions::unsafe_to_utf8);
3972
3973 THROW_HANDLE_0(h_exception);
3974 }
3975 return load_result;
3976 JVM_END
3977
3978
3979 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3980 JVMWrapper("JVM_UnloadLibrary");
3981 os::dll_unload(handle);
3982 JVM_END
3983
3984
3985 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3986 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3987 return os::dll_lookup(handle, name);
3988 JVM_END
3989
3990
3991 // Floating point support ////////////////////////////////////////////////////////////////////
3992
3993 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3994 JVMWrapper("JVM_IsNaN");
3995 return g_isnan(a);
3996 JVM_END
3997
3998
3999 // JNI version ///////////////////////////////////////////////////////////////////////////////
4000
4001 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
4002 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
4003 return Threads::is_supported_jni_version_including_1_1(version);
4004 JVM_END
4005
4006
4007 // String support ///////////////////////////////////////////////////////////////////////////
4008
4009 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4010 JVMWrapper("JVM_InternString");
4011 JvmtiVMObjectAllocEventCollector oam;
4012 if (str == NULL) return NULL;
4013 oop string = JNIHandles::resolve_non_null(str);
4014 oop result = StringTable::intern(string, CHECK_NULL);
4015 return (jstring) JNIHandles::make_local(env, result);
4016 JVM_END
4017
4018
4019 // Raw monitor support //////////////////////////////////////////////////////////////////////
4020
4021 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4022 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4023 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4024 // that only works with java threads.
4025
4026
4027 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4028 VM_Exit::block_if_vm_exited();
4029 JVMWrapper("JVM_RawMonitorCreate");
4030 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4031 }
4032
4033
4034 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4035 VM_Exit::block_if_vm_exited();
4036 JVMWrapper("JVM_RawMonitorDestroy");
4037 delete ((Mutex*) mon);
4038 }
4039
4040
4041 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4042 VM_Exit::block_if_vm_exited();
4043 JVMWrapper("JVM_RawMonitorEnter");
4044 ((Mutex*) mon)->jvm_raw_lock();
4045 return 0;
4046 }
4047
4048
4049 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4050 VM_Exit::block_if_vm_exited();
4051 JVMWrapper("JVM_RawMonitorExit");
4052 ((Mutex*) mon)->jvm_raw_unlock();
4053 }
4054
4055
4056 // Support for Serialization
4057
4058 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4059 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4060 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4061 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4062
4063 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4064 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4065 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4066 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4067
4068
4069 void initialize_converter_functions() {
4070 if (JDK_Version::is_gte_jdk14x_version()) {
4071 // These functions only exist for compatibility with 1.3.1 and earlier
4072 return;
4073 }
4074
4075 // called from universe_post_init()
4076 assert(
4077 int_bits_to_float_fn == NULL &&
4078 long_bits_to_double_fn == NULL &&
4079 float_to_int_bits_fn == NULL &&
4080 double_to_long_bits_fn == NULL ,
4081 "initialization done twice"
4082 );
4083 // initialize
4084 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4085 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4086 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4087 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4088 // verify
4089 assert(
4090 int_bits_to_float_fn != NULL &&
4091 long_bits_to_double_fn != NULL &&
4092 float_to_int_bits_fn != NULL &&
4093 double_to_long_bits_fn != NULL ,
4094 "initialization failed"
4095 );
4096 }
4097
4098
4099
4100 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4101
4102 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4103 Handle loader, Handle protection_domain,
4104 jboolean throwError, TRAPS) {
4105 // Security Note:
4106 // The Java level wrapper will perform the necessary security check allowing
4107 // us to pass the NULL as the initiating class loader. The VM is responsible for
4108 // the checkPackageAccess relative to the initiating class loader via the
4109 // protection_domain. The protection_domain is passed as NULL by the java code
4110 // if there is no security manager in 3-arg Class.forName().
4111 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4112
4113 KlassHandle klass_handle(THREAD, klass);
4114 // Check if we should initialize the class
4115 if (init && klass_handle->oop_is_instance()) {
4116 klass_handle->initialize(CHECK_NULL);
4117 }
4118 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4119 }
4120
4121
4122 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4123
4124 #ifndef PRODUCT
4125
4126 extern "C" {
4127 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4128 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4129 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4130 }
4131
4132 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4133 JVMWrapper("JVM_AccessBoolVMFlag");
4134 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4135 JVM_END
4136
4137 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4138 JVMWrapper("JVM_AccessVMIntFlag");
4139 intx v;
4140 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4141 *value = (jint)v;
4142 return result;
4143 JVM_END
4144
4145
4146 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4147 JVMWrapper("JVM_VMBreakPoint");
4148 oop the_obj = JNIHandles::resolve(obj);
4149 BREAKPOINT;
4150 JVM_END
4151
4152
4153 #endif
4154
4155
4156 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4157
4158 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4159 JVMWrapper("JVM_InvokeMethod");
4160 Handle method_handle;
4161 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4162 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4163 Handle receiver(THREAD, JNIHandles::resolve(obj));
4164 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4165 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4166 jobject res = JNIHandles::make_local(env, result);
4167 if (JvmtiExport::should_post_vm_object_alloc()) {
4168 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4169 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4170 if (java_lang_Class::is_primitive(ret_type)) {
4171 // Only for primitive type vm allocates memory for java object.
4172 // See box() method.
4173 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4174 }
4175 }
4176 return res;
4177 } else {
4178 THROW_0(vmSymbols::java_lang_StackOverflowError());
4179 }
4180 JVM_END
4181
4182
4183 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4184 JVMWrapper("JVM_NewInstanceFromConstructor");
4185 oop constructor_mirror = JNIHandles::resolve(c);
4186 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4187 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4188 jobject res = JNIHandles::make_local(env, result);
4189 if (JvmtiExport::should_post_vm_object_alloc()) {
4190 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4191 }
4192 return res;
4193 JVM_END
4194
4195 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4196
4197 JVM_LEAF(jboolean, JVM_SupportsCX8())
4198 JVMWrapper("JVM_SupportsCX8");
4199 return VM_Version::supports_cx8();
4200 JVM_END
4201
4202
4203 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4204 JVMWrapper("JVM_CX8Field");
4205 jlong res;
4206 oop o = JNIHandles::resolve(obj);
4207 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4208 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4209
4210 assert(VM_Version::supports_cx8(), "cx8 not supported");
4211 res = Atomic::cmpxchg(newVal, addr, oldVal);
4212
4213 return res == oldVal;
4214 JVM_END
4215
4216 // DTrace ///////////////////////////////////////////////////////////////////
4217
4218 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4219 JVMWrapper("JVM_DTraceGetVersion");
4220 return (jint)JVM_TRACING_DTRACE_VERSION;
4221 JVM_END
4222
4223 JVM_ENTRY(jlong,JVM_DTraceActivate(
4224 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4225 JVM_DTraceProvider* providers))
4226 JVMWrapper("JVM_DTraceActivate");
4227 return DTraceJSDT::activate(
4228 version, module_name, providers_count, providers, CHECK_0);
4229 JVM_END
4230
4231 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4232 JVMWrapper("JVM_DTraceIsProbeEnabled");
4233 return DTraceJSDT::is_probe_enabled(method);
4234 JVM_END
4235
4236 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4237 JVMWrapper("JVM_DTraceDispose");
4238 DTraceJSDT::dispose(handle);
4239 JVM_END
4240
4241 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4242 JVMWrapper("JVM_DTraceIsSupported");
4243 return DTraceJSDT::is_supported();
4244 JVM_END
4245
4246 // Returns an array of all live Thread objects (VM internal JavaThreads,
4247 // jvmti agent threads, and JNI attaching threads are skipped)
4248 // See CR 6404306 regarding JNI attaching threads
4249 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4250 ResourceMark rm(THREAD);
4251 ThreadsListEnumerator tle(THREAD, false, false);
4252 JvmtiVMObjectAllocEventCollector oam;
4253
4254 int num_threads = tle.num_threads();
4255 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4256 objArrayHandle threads_ah(THREAD, r);
4257
4258 for (int i = 0; i < num_threads; i++) {
4259 Handle h = tle.get_threadObj(i);
4260 threads_ah->obj_at_put(i, h());
4261 }
4262
4263 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4264 JVM_END
4265
4266
4267 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4268 // Return StackTraceElement[][], each element is the stack trace of a thread in
4269 // the corresponding entry in the given threads array
4270 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4271 JVMWrapper("JVM_DumpThreads");
4272 JvmtiVMObjectAllocEventCollector oam;
4273
4274 // Check if threads is null
4275 if (threads == NULL) {
4276 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4277 }
4278
4279 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4280 objArrayHandle ah(THREAD, a);
4281 int num_threads = ah->length();
4282 // check if threads is non-empty array
4283 if (num_threads == 0) {
4284 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4285 }
4286
4287 // check if threads is not an array of objects of Thread class
4288 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4289 if (k != SystemDictionary::Thread_klass()) {
4290 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4291 }
4292
4293 ResourceMark rm(THREAD);
4294
4295 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4296 for (int i = 0; i < num_threads; i++) {
4297 oop thread_obj = ah->obj_at(i);
4298 instanceHandle h(THREAD, (instanceOop) thread_obj);
4299 thread_handle_array->append(h);
4300 }
4301
4302 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4303 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4304
4305 JVM_END
4306
4307 // JVM monitoring and management support
4308 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4309 return Management::get_jmm_interface(version);
4310 JVM_END
4311
4312 // com.sun.tools.attach.VirtualMachine agent properties support
4313 //
4314 // Initialize the agent properties with the properties maintained in the VM
4315 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4316 JVMWrapper("JVM_InitAgentProperties");
4317 ResourceMark rm;
4318
4319 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4320
4321 PUTPROP(props, "sun.java.command", Arguments::java_command());
4322 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4323 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4324 return properties;
4325 JVM_END
4326
4327 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4328 {
4329 JVMWrapper("JVM_GetEnclosingMethodInfo");
4330 JvmtiVMObjectAllocEventCollector oam;
4331
4332 if (ofClass == NULL) {
4333 return NULL;
4334 }
4335 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4336 // Special handling for primitive objects
4337 if (java_lang_Class::is_primitive(mirror())) {
4338 return NULL;
4339 }
4340 Klass* k = java_lang_Class::as_Klass(mirror());
4341 if (!k->oop_is_instance()) {
4342 return NULL;
4343 }
4344 instanceKlassHandle ik_h(THREAD, k);
4345 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4346 if (encl_method_class_idx == 0) {
4347 return NULL;
4348 }
4349 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4350 objArrayHandle dest(THREAD, dest_o);
4351 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4352 dest->obj_at_put(0, enc_k->java_mirror());
4353 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4354 if (encl_method_method_idx != 0) {
4355 Symbol* sym = ik_h->constants()->symbol_at(
4356 extract_low_short_from_int(
4357 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4358 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4359 dest->obj_at_put(1, str());
4360 sym = ik_h->constants()->symbol_at(
4361 extract_high_short_from_int(
4362 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4363 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4364 dest->obj_at_put(2, str());
4365 }
4366 return (jobjectArray) JNIHandles::make_local(dest());
4367 }
4368 JVM_END
4369
4370 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4371 jint javaThreadState))
4372 {
4373 // If new thread states are added in future JDK and VM versions,
4374 // this should check if the JDK version is compatible with thread
4375 // states supported by the VM. Return NULL if not compatible.
4376 //
4377 // This function must map the VM java_lang_Thread::ThreadStatus
4378 // to the Java thread state that the JDK supports.
4379 //
4380
4381 typeArrayHandle values_h;
4382 switch (javaThreadState) {
4383 case JAVA_THREAD_STATE_NEW : {
4384 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4385 values_h = typeArrayHandle(THREAD, r);
4386 values_h->int_at_put(0, java_lang_Thread::NEW);
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_RUNNABLE : {
4390 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4391 values_h = typeArrayHandle(THREAD, r);
4392 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_BLOCKED : {
4396 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4397 values_h = typeArrayHandle(THREAD, r);
4398 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4399 break;
4400 }
4401 case JAVA_THREAD_STATE_WAITING : {
4402 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4403 values_h = typeArrayHandle(THREAD, r);
4404 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4405 values_h->int_at_put(1, java_lang_Thread::PARKED);
4406 break;
4407 }
4408 case JAVA_THREAD_STATE_TIMED_WAITING : {
4409 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4410 values_h = typeArrayHandle(THREAD, r);
4411 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4412 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4413 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4414 break;
4415 }
4416 case JAVA_THREAD_STATE_TERMINATED : {
4417 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4418 values_h = typeArrayHandle(THREAD, r);
4419 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4420 break;
4421 }
4422 default:
4423 // Unknown state - probably incompatible JDK version
4424 return NULL;
4425 }
4426
4427 return (jintArray) JNIHandles::make_local(env, values_h());
4428 }
4429 JVM_END
4430
4431
4432 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4433 jint javaThreadState,
4434 jintArray values))
4435 {
4436 // If new thread states are added in future JDK and VM versions,
4437 // this should check if the JDK version is compatible with thread
4438 // states supported by the VM. Return NULL if not compatible.
4439 //
4440 // This function must map the VM java_lang_Thread::ThreadStatus
4441 // to the Java thread state that the JDK supports.
4442 //
4443
4444 ResourceMark rm;
4445
4446 // Check if threads is null
4447 if (values == NULL) {
4448 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4449 }
4450
4451 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4452 typeArrayHandle values_h(THREAD, v);
4453
4454 objArrayHandle names_h;
4455 switch (javaThreadState) {
4456 case JAVA_THREAD_STATE_NEW : {
4457 assert(values_h->length() == 1 &&
4458 values_h->int_at(0) == java_lang_Thread::NEW,
4459 "Invalid threadStatus value");
4460
4461 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4462 1, /* only 1 substate */
4463 CHECK_NULL);
4464 names_h = objArrayHandle(THREAD, r);
4465 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4466 names_h->obj_at_put(0, name());
4467 break;
4468 }
4469 case JAVA_THREAD_STATE_RUNNABLE : {
4470 assert(values_h->length() == 1 &&
4471 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4472 "Invalid threadStatus value");
4473
4474 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4475 1, /* only 1 substate */
4476 CHECK_NULL);
4477 names_h = objArrayHandle(THREAD, r);
4478 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4479 names_h->obj_at_put(0, name());
4480 break;
4481 }
4482 case JAVA_THREAD_STATE_BLOCKED : {
4483 assert(values_h->length() == 1 &&
4484 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4485 "Invalid threadStatus value");
4486
4487 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4488 1, /* only 1 substate */
4489 CHECK_NULL);
4490 names_h = objArrayHandle(THREAD, r);
4491 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4492 names_h->obj_at_put(0, name());
4493 break;
4494 }
4495 case JAVA_THREAD_STATE_WAITING : {
4496 assert(values_h->length() == 2 &&
4497 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4498 values_h->int_at(1) == java_lang_Thread::PARKED,
4499 "Invalid threadStatus value");
4500 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4501 2, /* number of substates */
4502 CHECK_NULL);
4503 names_h = objArrayHandle(THREAD, r);
4504 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4505 CHECK_NULL);
4506 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4507 CHECK_NULL);
4508 names_h->obj_at_put(0, name0());
4509 names_h->obj_at_put(1, name1());
4510 break;
4511 }
4512 case JAVA_THREAD_STATE_TIMED_WAITING : {
4513 assert(values_h->length() == 3 &&
4514 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4515 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4516 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4517 "Invalid threadStatus value");
4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4519 3, /* number of substates */
4520 CHECK_NULL);
4521 names_h = objArrayHandle(THREAD, r);
4522 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4523 CHECK_NULL);
4524 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4525 CHECK_NULL);
4526 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4527 CHECK_NULL);
4528 names_h->obj_at_put(0, name0());
4529 names_h->obj_at_put(1, name1());
4530 names_h->obj_at_put(2, name2());
4531 break;
4532 }
4533 case JAVA_THREAD_STATE_TERMINATED : {
4534 assert(values_h->length() == 1 &&
4535 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4536 "Invalid threadStatus value");
4537 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4538 1, /* only 1 substate */
4539 CHECK_NULL);
4540 names_h = objArrayHandle(THREAD, r);
4541 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4542 names_h->obj_at_put(0, name());
4543 break;
4544 }
4545 default:
4546 // Unknown state - probably incompatible JDK version
4547 return NULL;
4548 }
4549 return (jobjectArray) JNIHandles::make_local(env, names_h());
4550 }
4551 JVM_END
4552
4553 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4554 {
4555 memset(info, 0, info_size);
4556
4557 info->jvm_version = Abstract_VM_Version::jvm_version();
4558 info->update_version = 0; /* 0 in HotSpot Express VM */
4559 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4560
4561 // when we add a new capability in the jvm_version_info struct, we should also
4562 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4563 // counter defined in runtimeService.cpp.
4564 info->is_attachable = AttachListener::is_attach_supported();
4565 }
4566 JVM_END