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 // new ProtectionDomain(null,null);
1294 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1295 Handle null_pd(THREAD, null_protection_domain);
1296
1297 // new ProtectionDomain[] {pd};
1298 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1299 context->obj_at_put(0, null_pd());
1300
1301 // new AccessControlContext(new ProtectionDomain[] {pd})
1302 objArrayHandle h_context(THREAD, context);
1303 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1304 return result;
1305 }
1306
1307 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1308 JVMWrapper("JVM_DoPrivileged");
1309
1310 if (action == NULL) {
1311 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1312 }
1313
1314 // Compute the frame initiating the do privileged operation and setup the privileged stack
1315 vframeStream vfst(thread);
1316 vfst.security_get_caller_frame(1);
1317
1318 if (vfst.at_end()) {
1319 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1320 }
1321
1322 Method* method = vfst.method();
1323 instanceKlassHandle klass (THREAD, method->method_holder());
1324
1325 // Check that action object understands "Object run()"
1326 Handle h_context;
1327 if (context != NULL) {
1328 h_context = Handle(THREAD, JNIHandles::resolve(context));
1329 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1330 if (!authorized) {
1331 // Create an unprivileged access control object and call it's run function
1332 // instead.
1333 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1334 h_context = Handle(THREAD, noprivs);
1335 }
1336 }
1337
1338 // Check that action object understands "Object run()"
1339 Handle object (THREAD, JNIHandles::resolve(action));
1340
1341 // get run() method
1342 Method* m_oop = object->klass()->uncached_lookup_method(
1343 vmSymbols::run_method_name(),
1344 vmSymbols::void_object_signature(),
1345 Klass::normal);
1346 methodHandle m (THREAD, m_oop);
1347 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1348 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1349 }
1350
1351 // Stack allocated list of privileged stack elements
1352 PrivilegedElement pi;
1353 if (!vfst.at_end()) {
1354 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1355 thread->set_privileged_stack_top(&pi);
1356 }
1357
1358
1359 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1360 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1361 Handle pending_exception;
1362 JavaValue result(T_OBJECT);
1363 JavaCallArguments args(object);
1364 JavaCalls::call(&result, m, &args, THREAD);
1365
1366 // done with action, remove ourselves from the list
1367 if (!vfst.at_end()) {
1368 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1369 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1370 }
1371
1372 if (HAS_PENDING_EXCEPTION) {
1373 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1374 CLEAR_PENDING_EXCEPTION;
1375 // JVMTI has already reported the pending exception
1376 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1377 if (THREAD->is_Java_thread()) {
1378 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1379 }
1380 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1381 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1382 // Throw a java.security.PrivilegedActionException(Exception e) exception
1383 JavaCallArguments args(pending_exception);
1384 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1385 vmSymbols::exception_void_signature(),
1386 &args);
1387 }
1388 }
1389
1390 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1391 return JNIHandles::make_local(env, (oop) result.get_jobject());
1392 JVM_END
1393
1394
1395 // Returns the inherited_access_control_context field of the running thread.
1396 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1397 JVMWrapper("JVM_GetInheritedAccessControlContext");
1398 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1399 return JNIHandles::make_local(env, result);
1400 JVM_END
1401
1402 class RegisterArrayForGC {
1403 private:
1404 JavaThread *_thread;
1405 public:
1406 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1407 _thread = thread;
1408 _thread->register_array_for_gc(array);
1409 }
1410
1411 ~RegisterArrayForGC() {
1412 _thread->register_array_for_gc(NULL);
1413 }
1414 };
1415
1416
1417 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1418 JVMWrapper("JVM_GetStackAccessControlContext");
1419 if (!UsePrivilegedStack) return NULL;
1420
1421 ResourceMark rm(THREAD);
1422 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1423 JvmtiVMObjectAllocEventCollector oam;
1424
1425 // count the protection domains on the execution stack. We collapse
1426 // duplicate consecutive protection domains into a single one, as
1427 // well as stopping when we hit a privileged frame.
1428
1429 // Use vframeStream to iterate through Java frames
1430 vframeStream vfst(thread);
1431
1432 oop previous_protection_domain = NULL;
1433 Handle privileged_context(thread, NULL);
1434 bool is_privileged = false;
1435 oop protection_domain = NULL;
1436
1437 for(; !vfst.at_end(); vfst.next()) {
1438 // get method of frame
1439 Method* method = vfst.method();
1440 intptr_t* frame_id = vfst.frame_id();
1441
1442 // check the privileged frames to see if we have a match
1443 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1444 // this frame is privileged
1445 is_privileged = true;
1446 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1447 protection_domain = thread->privileged_stack_top()->protection_domain();
1448 } else {
1449 protection_domain = method->method_holder()->protection_domain();
1450 }
1451
1452 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1453 local_array->push(protection_domain);
1454 previous_protection_domain = protection_domain;
1455 }
1456
1457 if (is_privileged) break;
1458 }
1459
1460
1461 // either all the domains on the stack were system domains, or
1462 // we had a privileged system domain
1463 if (local_array->is_empty()) {
1464 if (is_privileged && privileged_context.is_null()) return NULL;
1465
1466 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1467 return JNIHandles::make_local(env, result);
1468 }
1469
1470 // the resource area must be registered in case of a gc
1471 RegisterArrayForGC ragc(thread, local_array);
1472 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1473 local_array->length(), CHECK_NULL);
1474 objArrayHandle h_context(thread, context);
1475 for (int index = 0; index < local_array->length(); index++) {
1476 h_context->obj_at_put(index, local_array->at(index));
1477 }
1478
1479 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1480
1481 return JNIHandles::make_local(env, result);
1482 JVM_END
1483
1484
1485 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1486 JVMWrapper("JVM_IsArrayClass");
1487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1488 return (k != NULL) && k->oop_is_array() ? true : false;
1489 JVM_END
1490
1491
1492 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1493 JVMWrapper("JVM_IsPrimitiveClass");
1494 oop mirror = JNIHandles::resolve_non_null(cls);
1495 return (jboolean) java_lang_Class::is_primitive(mirror);
1496 JVM_END
1497
1498
1499 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1500 JVMWrapper("JVM_GetComponentType");
1501 oop mirror = JNIHandles::resolve_non_null(cls);
1502 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1503 return (jclass) JNIHandles::make_local(env, result);
1504 JVM_END
1505
1506
1507 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1508 JVMWrapper("JVM_GetClassModifiers");
1509 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1510 // Primitive type
1511 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1512 }
1513
1514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1515 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1516 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1517 return k->modifier_flags();
1518 JVM_END
1519
1520
1521 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1522
1523 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1524 JvmtiVMObjectAllocEventCollector oam;
1525 // ofClass is a reference to a java_lang_Class object. The mirror object
1526 // of an InstanceKlass
1527
1528 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1529 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1530 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1531 return (jobjectArray)JNIHandles::make_local(env, result);
1532 }
1533
1534 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1535 InnerClassesIterator iter(k);
1536
1537 if (iter.length() == 0) {
1538 // Neither an inner nor outer class
1539 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1540 return (jobjectArray)JNIHandles::make_local(env, result);
1541 }
1542
1543 // find inner class info
1544 constantPoolHandle cp(thread, k->constants());
1545 int length = iter.length();
1546
1547 // Allocate temp. result array
1548 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1549 objArrayHandle result (THREAD, r);
1550 int members = 0;
1551
1552 for (; !iter.done(); iter.next()) {
1553 int ioff = iter.inner_class_info_index();
1554 int ooff = iter.outer_class_info_index();
1555
1556 if (ioff != 0 && ooff != 0) {
1557 // Check to see if the name matches the class we're looking for
1558 // before attempting to find the class.
1559 if (cp->klass_name_at_matches(k, ooff)) {
1560 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1561 if (outer_klass == k()) {
1562 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1563 instanceKlassHandle inner_klass (THREAD, ik);
1564
1565 // Throws an exception if outer klass has not declared k as
1566 // an inner klass
1567 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1568
1569 result->obj_at_put(members, inner_klass->java_mirror());
1570 members++;
1571 }
1572 }
1573 }
1574 }
1575
1576 if (members != length) {
1577 // Return array of right length
1578 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1579 for(int i = 0; i < members; i++) {
1580 res->obj_at_put(i, result->obj_at(i));
1581 }
1582 return (jobjectArray)JNIHandles::make_local(env, res);
1583 }
1584
1585 return (jobjectArray)JNIHandles::make_local(env, result());
1586 JVM_END
1587
1588
1589 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1590 {
1591 // ofClass is a reference to a java_lang_Class object.
1592 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1593 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1594 return NULL;
1595 }
1596
1597 bool inner_is_member = false;
1598 Klass* outer_klass
1599 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1600 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1601 if (outer_klass == NULL) return NULL; // already a top-level class
1602 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1603 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1604 }
1605 JVM_END
1606
1607 // should be in InstanceKlass.cpp, but is here for historical reasons
1608 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1609 bool* inner_is_member,
1610 TRAPS) {
1611 Thread* thread = THREAD;
1612 InnerClassesIterator iter(k);
1613 if (iter.length() == 0) {
1614 // No inner class info => no declaring class
1615 return NULL;
1616 }
1617
1618 constantPoolHandle i_cp(thread, k->constants());
1619
1620 bool found = false;
1621 Klass* ok;
1622 instanceKlassHandle outer_klass;
1623 *inner_is_member = false;
1624
1625 // Find inner_klass attribute
1626 for (; !iter.done() && !found; iter.next()) {
1627 int ioff = iter.inner_class_info_index();
1628 int ooff = iter.outer_class_info_index();
1629 int noff = iter.inner_name_index();
1630 if (ioff != 0) {
1631 // Check to see if the name matches the class we're looking for
1632 // before attempting to find the class.
1633 if (i_cp->klass_name_at_matches(k, ioff)) {
1634 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1635 found = (k() == inner_klass);
1636 if (found && ooff != 0) {
1637 ok = i_cp->klass_at(ooff, CHECK_NULL);
1638 outer_klass = instanceKlassHandle(thread, ok);
1639 *inner_is_member = true;
1640 }
1641 }
1642 }
1643 }
1644
1645 if (found && outer_klass.is_null()) {
1646 // It may be anonymous; try for that.
1647 int encl_method_class_idx = k->enclosing_method_class_index();
1648 if (encl_method_class_idx != 0) {
1649 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1650 outer_klass = instanceKlassHandle(thread, ok);
1651 *inner_is_member = false;
1652 }
1653 }
1654
1655 // If no inner class attribute found for this class.
1656 if (outer_klass.is_null()) return NULL;
1657
1658 // Throws an exception if outer klass has not declared k as an inner klass
1659 // We need evidence that each klass knows about the other, or else
1660 // the system could allow a spoof of an inner class to gain access rights.
1661 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1662 return outer_klass();
1663 }
1664
1665 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1666 assert (cls != NULL, "illegal class");
1667 JVMWrapper("JVM_GetClassSignature");
1668 JvmtiVMObjectAllocEventCollector oam;
1669 ResourceMark rm(THREAD);
1670 // Return null for arrays and primatives
1671 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1672 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1673 if (k->oop_is_instance()) {
1674 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1675 if (sym == NULL) return NULL;
1676 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1677 return (jstring) JNIHandles::make_local(env, str());
1678 }
1679 }
1680 return NULL;
1681 JVM_END
1682
1683
1684 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1685 assert (cls != NULL, "illegal class");
1686 JVMWrapper("JVM_GetClassAnnotations");
1687
1688 // Return null for arrays and primitives
1689 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1690 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1691 if (k->oop_is_instance()) {
1692 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1693 return (jbyteArray) JNIHandles::make_local(env, a);
1694 }
1695 }
1696 return NULL;
1697 JVM_END
1698
1699
1700 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1701 // some of this code was adapted from from jni_FromReflectedField
1702
1703 oop reflected = JNIHandles::resolve_non_null(field);
1704 oop mirror = java_lang_reflect_Field::clazz(reflected);
1705 Klass* k = java_lang_Class::as_Klass(mirror);
1706 int slot = java_lang_reflect_Field::slot(reflected);
1707 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1708
1709 KlassHandle kh(THREAD, k);
1710 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1711
1712 if (modifiers & JVM_ACC_STATIC) {
1713 // for static fields we only look in the current class
1714 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1715 assert(false, "cannot find static field");
1716 return false;
1717 }
1718 } else {
1719 // for instance fields we start with the current class and work
1720 // our way up through the superclass chain
1721 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1722 assert(false, "cannot find instance field");
1723 return false;
1724 }
1725 }
1726 return true;
1727 }
1728
1729 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1730 // field is a handle to a java.lang.reflect.Field object
1731 assert(field != NULL, "illegal field");
1732 JVMWrapper("JVM_GetFieldAnnotations");
1733
1734 fieldDescriptor fd;
1735 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1736 if (!gotFd) {
1737 return NULL;
1738 }
1739
1740 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1741 JVM_END
1742
1743
1744 static Method* jvm_get_method_common(jobject method) {
1745 // some of this code was adapted from from jni_FromReflectedMethod
1746
1747 oop reflected = JNIHandles::resolve_non_null(method);
1748 oop mirror = NULL;
1749 int slot = 0;
1750
1751 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1752 mirror = java_lang_reflect_Constructor::clazz(reflected);
1753 slot = java_lang_reflect_Constructor::slot(reflected);
1754 } else {
1755 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1756 "wrong type");
1757 mirror = java_lang_reflect_Method::clazz(reflected);
1758 slot = java_lang_reflect_Method::slot(reflected);
1759 }
1760 Klass* k = java_lang_Class::as_Klass(mirror);
1761
1762 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1763 assert(m != NULL, "cannot find method");
1764 return m; // caller has to deal with NULL in product mode
1765 }
1766
1767
1768 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1769 JVMWrapper("JVM_GetMethodAnnotations");
1770
1771 // method is a handle to a java.lang.reflect.Method object
1772 Method* m = jvm_get_method_common(method);
1773 if (m == NULL) {
1774 return NULL;
1775 }
1776
1777 return (jbyteArray) JNIHandles::make_local(env,
1778 Annotations::make_java_array(m->annotations(), THREAD));
1779 JVM_END
1780
1781
1782 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1783 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1784
1785 // method is a handle to a java.lang.reflect.Method object
1786 Method* m = jvm_get_method_common(method);
1787 if (m == NULL) {
1788 return NULL;
1789 }
1790
1791 return (jbyteArray) JNIHandles::make_local(env,
1792 Annotations::make_java_array(m->annotation_default(), THREAD));
1793 JVM_END
1794
1795
1796 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1797 JVMWrapper("JVM_GetMethodParameterAnnotations");
1798
1799 // method is a handle to a java.lang.reflect.Method object
1800 Method* m = jvm_get_method_common(method);
1801 if (m == NULL) {
1802 return NULL;
1803 }
1804
1805 return (jbyteArray) JNIHandles::make_local(env,
1806 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1807 JVM_END
1808
1809 /* Type use annotations support (JDK 1.8) */
1810
1811 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1812 assert (cls != NULL, "illegal class");
1813 JVMWrapper("JVM_GetClassTypeAnnotations");
1814 ResourceMark rm(THREAD);
1815 // Return null for arrays and primitives
1816 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1817 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1818 if (k->oop_is_instance()) {
1819 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1820 if (type_annotations != NULL) {
1821 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1822 return (jbyteArray) JNIHandles::make_local(env, a);
1823 }
1824 }
1825 }
1826 return NULL;
1827 JVM_END
1828
1829 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1830 assert (method != NULL, "illegal method");
1831 JVMWrapper("JVM_GetMethodTypeAnnotations");
1832
1833 // method is a handle to a java.lang.reflect.Method object
1834 Method* m = jvm_get_method_common(method);
1835 if (m == NULL) {
1836 return NULL;
1837 }
1838
1839 AnnotationArray* type_annotations = m->type_annotations();
1840 if (type_annotations != NULL) {
1841 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1842 return (jbyteArray) JNIHandles::make_local(env, a);
1843 }
1844
1845 return NULL;
1846 JVM_END
1847
1848 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1849 assert (field != NULL, "illegal field");
1850 JVMWrapper("JVM_GetFieldTypeAnnotations");
1851
1852 fieldDescriptor fd;
1853 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1854 if (!gotFd) {
1855 return NULL;
1856 }
1857
1858 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1859 JVM_END
1860
1861 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1862 if (!cp->is_within_bounds(index)) {
1863 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1864 }
1865 }
1866
1867 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1868 {
1869 JVMWrapper("JVM_GetMethodParameters");
1870 // method is a handle to a java.lang.reflect.Method object
1871 Method* method_ptr = jvm_get_method_common(method);
1872 methodHandle mh (THREAD, method_ptr);
1873 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1874 const int num_params = mh->method_parameters_length();
1875
1876 if (0 != num_params) {
1877 // make sure all the symbols are properly formatted
1878 for (int i = 0; i < num_params; i++) {
1879 MethodParametersElement* params = mh->method_parameters_start();
1880 int index = params[i].name_cp_index;
1881 bounds_check(mh->constants(), index, CHECK_NULL);
1882
1883 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1884 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1885 "Wrong type at constant pool index");
1886 }
1887
1888 }
1889
1890 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1891 objArrayHandle result (THREAD, result_oop);
1892
1893 for (int i = 0; i < num_params; i++) {
1894 MethodParametersElement* params = mh->method_parameters_start();
1895 // For a 0 index, give a NULL symbol
1896 Symbol* sym = 0 != params[i].name_cp_index ?
1897 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1898 int flags = params[i].flags;
1899 oop param = Reflection::new_parameter(reflected_method, i, sym,
1900 flags, CHECK_NULL);
1901 result->obj_at_put(i, param);
1902 }
1903 return (jobjectArray)JNIHandles::make_local(env, result());
1904 } else {
1905 return (jobjectArray)NULL;
1906 }
1907 }
1908 JVM_END
1909
1910 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1911
1912 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1913 {
1914 JVMWrapper("JVM_GetClassDeclaredFields");
1915 JvmtiVMObjectAllocEventCollector oam;
1916
1917 // Exclude primitive types and array types
1918 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1919 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1920 // Return empty array
1921 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1922 return (jobjectArray) JNIHandles::make_local(env, res);
1923 }
1924
1925 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1926 constantPoolHandle cp(THREAD, k->constants());
1927
1928 // Ensure class is linked
1929 k->link_class(CHECK_NULL);
1930
1931 // 4496456 We need to filter out java.lang.Throwable.backtrace
1932 bool skip_backtrace = false;
1933
1934 // Allocate result
1935 int num_fields;
1936
1937 if (publicOnly) {
1938 num_fields = 0;
1939 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1940 if (fs.access_flags().is_public()) ++num_fields;
1941 }
1942 } else {
1943 num_fields = k->java_fields_count();
1944
1945 if (k() == SystemDictionary::Throwable_klass()) {
1946 num_fields--;
1947 skip_backtrace = true;
1948 }
1949 }
1950
1951 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1952 objArrayHandle result (THREAD, r);
1953
1954 int out_idx = 0;
1955 fieldDescriptor fd;
1956 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1957 if (skip_backtrace) {
1958 // 4496456 skip java.lang.Throwable.backtrace
1959 int offset = fs.offset();
1960 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1961 }
1962
1963 if (!publicOnly || fs.access_flags().is_public()) {
1964 fd.reinitialize(k(), fs.index());
1965 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1966 result->obj_at_put(out_idx, field);
1967 ++out_idx;
1968 }
1969 }
1970 assert(out_idx == num_fields, "just checking");
1971 return (jobjectArray) JNIHandles::make_local(env, result());
1972 }
1973 JVM_END
1974
1975 static bool select_method(methodHandle method, bool want_constructor) {
1976 if (want_constructor) {
1977 return (method->is_initializer() && !method->is_static());
1978 } else {
1979 return (!method->is_initializer() && !method->is_overpass());
1980 }
1981 }
1982
1983 static jobjectArray get_class_declared_methods_helper(
1984 JNIEnv *env,
1985 jclass ofClass, jboolean publicOnly,
1986 bool want_constructor,
1987 Klass* klass, TRAPS) {
1988
1989 JvmtiVMObjectAllocEventCollector oam;
1990
1991 // Exclude primitive types and array types
1992 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1993 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1994 // Return empty array
1995 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1996 return (jobjectArray) JNIHandles::make_local(env, res);
1997 }
1998
1999 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2000
2001 // Ensure class is linked
2002 k->link_class(CHECK_NULL);
2003
2004 Array<Method*>* methods = k->methods();
2005 int methods_length = methods->length();
2006
2007 // Save original method_idnum in case of redefinition, which can change
2008 // the idnum of obsolete methods. The new method will have the same idnum
2009 // but if we refresh the methods array, the counts will be wrong.
2010 ResourceMark rm(THREAD);
2011 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2012 int num_methods = 0;
2013
2014 for (int i = 0; i < methods_length; i++) {
2015 methodHandle method(THREAD, methods->at(i));
2016 if (select_method(method, want_constructor)) {
2017 if (!publicOnly || method->is_public()) {
2018 idnums->push(method->method_idnum());
2019 ++num_methods;
2020 }
2021 }
2022 }
2023
2024 // Allocate result
2025 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2026 objArrayHandle result (THREAD, r);
2027
2028 // Now just put the methods that we selected above, but go by their idnum
2029 // in case of redefinition. The methods can be redefined at any safepoint,
2030 // so above when allocating the oop array and below when creating reflect
2031 // objects.
2032 for (int i = 0; i < num_methods; i++) {
2033 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2034 if (method.is_null()) {
2035 // Method may have been deleted and seems this API can handle null
2036 // Otherwise should probably put a method that throws NSME
2037 result->obj_at_put(i, NULL);
2038 } else {
2039 oop m;
2040 if (want_constructor) {
2041 m = Reflection::new_constructor(method, CHECK_NULL);
2042 } else {
2043 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2044 }
2045 result->obj_at_put(i, m);
2046 }
2047 }
2048
2049 return (jobjectArray) JNIHandles::make_local(env, result());
2050 }
2051
2052 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2053 {
2054 JVMWrapper("JVM_GetClassDeclaredMethods");
2055 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2056 /*want_constructor*/ false,
2057 SystemDictionary::reflect_Method_klass(), THREAD);
2058 }
2059 JVM_END
2060
2061 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2062 {
2063 JVMWrapper("JVM_GetClassDeclaredConstructors");
2064 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2065 /*want_constructor*/ true,
2066 SystemDictionary::reflect_Constructor_klass(), THREAD);
2067 }
2068 JVM_END
2069
2070 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2071 {
2072 JVMWrapper("JVM_GetClassAccessFlags");
2073 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2074 // Primitive type
2075 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2076 }
2077
2078 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2079 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2080 }
2081 JVM_END
2082
2083
2084 // Constant pool access //////////////////////////////////////////////////////////
2085
2086 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2087 {
2088 JVMWrapper("JVM_GetClassConstantPool");
2089 JvmtiVMObjectAllocEventCollector oam;
2090
2091 // Return null for primitives and arrays
2092 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2093 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2094 if (k->oop_is_instance()) {
2095 instanceKlassHandle k_h(THREAD, k);
2096 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2097 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2098 return JNIHandles::make_local(jcp());
2099 }
2100 }
2101 return NULL;
2102 }
2103 JVM_END
2104
2105
2106 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2107 {
2108 JVMWrapper("JVM_ConstantPoolGetSize");
2109 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2110 return cp->length();
2111 }
2112 JVM_END
2113
2114
2115 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetClassAt");
2118 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119 bounds_check(cp, index, CHECK_NULL);
2120 constantTag tag = cp->tag_at(index);
2121 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123 }
2124 Klass* k = cp->klass_at(index, CHECK_NULL);
2125 return (jclass) JNIHandles::make_local(k->java_mirror());
2126 }
2127 JVM_END
2128
2129 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2130 {
2131 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2132 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2133 bounds_check(cp, index, CHECK_NULL);
2134 constantTag tag = cp->tag_at(index);
2135 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2136 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2137 }
2138 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2139 if (k == NULL) return NULL;
2140 return (jclass) JNIHandles::make_local(k->java_mirror());
2141 }
2142 JVM_END
2143
2144 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2145 constantTag tag = cp->tag_at(index);
2146 if (!tag.is_method() && !tag.is_interface_method()) {
2147 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2148 }
2149 int klass_ref = cp->uncached_klass_ref_index_at(index);
2150 Klass* k_o;
2151 if (force_resolution) {
2152 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2153 } else {
2154 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2155 if (k_o == NULL) return NULL;
2156 }
2157 instanceKlassHandle k(THREAD, k_o);
2158 Symbol* name = cp->uncached_name_ref_at(index);
2159 Symbol* sig = cp->uncached_signature_ref_at(index);
2160 methodHandle m (THREAD, k->find_method(name, sig));
2161 if (m.is_null()) {
2162 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2163 }
2164 oop method;
2165 if (!m->is_initializer() || m->is_static()) {
2166 method = Reflection::new_method(m, true, true, CHECK_NULL);
2167 } else {
2168 method = Reflection::new_constructor(m, CHECK_NULL);
2169 }
2170 return JNIHandles::make_local(method);
2171 }
2172
2173 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2174 {
2175 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2176 JvmtiVMObjectAllocEventCollector oam;
2177 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2178 bounds_check(cp, index, CHECK_NULL);
2179 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2180 return res;
2181 }
2182 JVM_END
2183
2184 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2185 {
2186 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2187 JvmtiVMObjectAllocEventCollector oam;
2188 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_NULL);
2190 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2191 return res;
2192 }
2193 JVM_END
2194
2195 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2196 constantTag tag = cp->tag_at(index);
2197 if (!tag.is_field()) {
2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2199 }
2200 int klass_ref = cp->uncached_klass_ref_index_at(index);
2201 Klass* k_o;
2202 if (force_resolution) {
2203 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2204 } else {
2205 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2206 if (k_o == NULL) return NULL;
2207 }
2208 instanceKlassHandle k(THREAD, k_o);
2209 Symbol* name = cp->uncached_name_ref_at(index);
2210 Symbol* sig = cp->uncached_signature_ref_at(index);
2211 fieldDescriptor fd;
2212 Klass* target_klass = k->find_field(name, sig, &fd);
2213 if (target_klass == NULL) {
2214 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2215 }
2216 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2217 return JNIHandles::make_local(field);
2218 }
2219
2220 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2221 {
2222 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2223 JvmtiVMObjectAllocEventCollector oam;
2224 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2225 bounds_check(cp, index, CHECK_NULL);
2226 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2227 return res;
2228 }
2229 JVM_END
2230
2231 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2232 {
2233 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2234 JvmtiVMObjectAllocEventCollector oam;
2235 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2236 bounds_check(cp, index, CHECK_NULL);
2237 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2238 return res;
2239 }
2240 JVM_END
2241
2242 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2243 {
2244 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2245 JvmtiVMObjectAllocEventCollector oam;
2246 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2247 bounds_check(cp, index, CHECK_NULL);
2248 constantTag tag = cp->tag_at(index);
2249 if (!tag.is_field_or_method()) {
2250 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2251 }
2252 int klass_ref = cp->uncached_klass_ref_index_at(index);
2253 Symbol* klass_name = cp->klass_name_at(klass_ref);
2254 Symbol* member_name = cp->uncached_name_ref_at(index);
2255 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2256 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2257 objArrayHandle dest(THREAD, dest_o);
2258 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2259 dest->obj_at_put(0, str());
2260 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2261 dest->obj_at_put(1, str());
2262 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2263 dest->obj_at_put(2, str());
2264 return (jobjectArray) JNIHandles::make_local(dest());
2265 }
2266 JVM_END
2267
2268 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2269 {
2270 JVMWrapper("JVM_ConstantPoolGetIntAt");
2271 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2272 bounds_check(cp, index, CHECK_0);
2273 constantTag tag = cp->tag_at(index);
2274 if (!tag.is_int()) {
2275 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2276 }
2277 return cp->int_at(index);
2278 }
2279 JVM_END
2280
2281 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2282 {
2283 JVMWrapper("JVM_ConstantPoolGetLongAt");
2284 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2285 bounds_check(cp, index, CHECK_(0L));
2286 constantTag tag = cp->tag_at(index);
2287 if (!tag.is_long()) {
2288 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2289 }
2290 return cp->long_at(index);
2291 }
2292 JVM_END
2293
2294 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2295 {
2296 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2297 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2298 bounds_check(cp, index, CHECK_(0.0f));
2299 constantTag tag = cp->tag_at(index);
2300 if (!tag.is_float()) {
2301 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2302 }
2303 return cp->float_at(index);
2304 }
2305 JVM_END
2306
2307 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2308 {
2309 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2310 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2311 bounds_check(cp, index, CHECK_(0.0));
2312 constantTag tag = cp->tag_at(index);
2313 if (!tag.is_double()) {
2314 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2315 }
2316 return cp->double_at(index);
2317 }
2318 JVM_END
2319
2320 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2321 {
2322 JVMWrapper("JVM_ConstantPoolGetStringAt");
2323 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2324 bounds_check(cp, index, CHECK_NULL);
2325 constantTag tag = cp->tag_at(index);
2326 if (!tag.is_string()) {
2327 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2328 }
2329 oop str = cp->string_at(index, CHECK_NULL);
2330 return (jstring) JNIHandles::make_local(str);
2331 }
2332 JVM_END
2333
2334 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2335 {
2336 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2337 JvmtiVMObjectAllocEventCollector oam;
2338 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2339 bounds_check(cp, index, CHECK_NULL);
2340 constantTag tag = cp->tag_at(index);
2341 if (!tag.is_symbol()) {
2342 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2343 }
2344 Symbol* sym = cp->symbol_at(index);
2345 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2346 return (jstring) JNIHandles::make_local(str());
2347 }
2348 JVM_END
2349
2350
2351 // Assertion support. //////////////////////////////////////////////////////////
2352
2353 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2354 JVMWrapper("JVM_DesiredAssertionStatus");
2355 assert(cls != NULL, "bad class");
2356
2357 oop r = JNIHandles::resolve(cls);
2358 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2359 if (java_lang_Class::is_primitive(r)) return false;
2360
2361 Klass* k = java_lang_Class::as_Klass(r);
2362 assert(k->oop_is_instance(), "must be an instance klass");
2363 if (! k->oop_is_instance()) return false;
2364
2365 ResourceMark rm(THREAD);
2366 const char* name = k->name()->as_C_string();
2367 bool system_class = k->class_loader() == NULL;
2368 return JavaAssertions::enabled(name, system_class);
2369
2370 JVM_END
2371
2372
2373 // Return a new AssertionStatusDirectives object with the fields filled in with
2374 // command-line assertion arguments (i.e., -ea, -da).
2375 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2376 JVMWrapper("JVM_AssertionStatusDirectives");
2377 JvmtiVMObjectAllocEventCollector oam;
2378 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2379 return JNIHandles::make_local(env, asd);
2380 JVM_END
2381
2382 // Verification ////////////////////////////////////////////////////////////////////////////////
2383
2384 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2385
2386 // RedefineClasses support: bug 6214132 caused verification to fail.
2387 // All functions from this section should call the jvmtiThreadSate function:
2388 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2389 // The function returns a Klass* of the _scratch_class if the verifier
2390 // was invoked in the middle of the class redefinition.
2391 // Otherwise it returns its argument value which is the _the_class Klass*.
2392 // Please, refer to the description in the jvmtiThreadSate.hpp.
2393
2394 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2395 JVMWrapper("JVM_GetClassNameUTF");
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 return k->name()->as_utf8();
2399 JVM_END
2400
2401
2402 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2403 JVMWrapper("JVM_GetClassCPTypes");
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 // types will have length zero if this is not an InstanceKlass
2407 // (length is determined by call to JVM_GetClassCPEntriesCount)
2408 if (k->oop_is_instance()) {
2409 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2410 for (int index = cp->length() - 1; index >= 0; index--) {
2411 constantTag tag = cp->tag_at(index);
2412 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2413 }
2414 }
2415 JVM_END
2416
2417
2418 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2419 JVMWrapper("JVM_GetClassCPEntriesCount");
2420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2421 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2422 if (!k->oop_is_instance())
2423 return 0;
2424 return InstanceKlass::cast(k)->constants()->length();
2425 JVM_END
2426
2427
2428 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2429 JVMWrapper("JVM_GetClassFieldsCount");
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 if (!k->oop_is_instance())
2433 return 0;
2434 return InstanceKlass::cast(k)->java_fields_count();
2435 JVM_END
2436
2437
2438 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2439 JVMWrapper("JVM_GetClassMethodsCount");
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 if (!k->oop_is_instance())
2443 return 0;
2444 return InstanceKlass::cast(k)->methods()->length();
2445 JVM_END
2446
2447
2448 // The following methods, used for the verifier, are never called with
2449 // array klasses, so a direct cast to InstanceKlass is safe.
2450 // Typically, these methods are called in a loop with bounds determined
2451 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2452 // zero for arrays.
2453 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2454 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2458 int length = method->checked_exceptions_length();
2459 if (length > 0) {
2460 CheckedExceptionElement* table= method->checked_exceptions_start();
2461 for (int i = 0; i < length; i++) {
2462 exceptions[i] = table[i].class_cp_index;
2463 }
2464 }
2465 JVM_END
2466
2467
2468 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2469 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2473 return method->checked_exceptions_length();
2474 JVM_END
2475
2476
2477 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2478 JVMWrapper("JVM_GetMethodIxByteCode");
2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2482 memcpy(code, method->code_base(), method->code_size());
2483 JVM_END
2484
2485
2486 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2487 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2488 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2489 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2490 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2491 return method->code_size();
2492 JVM_END
2493
2494
2495 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2496 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2500 ExceptionTable extable(method);
2501 entry->start_pc = extable.start_pc(entry_index);
2502 entry->end_pc = extable.end_pc(entry_index);
2503 entry->handler_pc = extable.handler_pc(entry_index);
2504 entry->catchType = extable.catch_type_index(entry_index);
2505 JVM_END
2506
2507
2508 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2509 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2510 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2511 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2512 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2513 return method->exception_table_length();
2514 JVM_END
2515
2516
2517 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2518 JVMWrapper("JVM_GetMethodIxModifiers");
2519 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2520 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2521 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2522 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2523 JVM_END
2524
2525
2526 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2527 JVMWrapper("JVM_GetFieldIxModifiers");
2528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2531 JVM_END
2532
2533
2534 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2535 JVMWrapper("JVM_GetMethodIxLocalsCount");
2536 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2538 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2539 return method->max_locals();
2540 JVM_END
2541
2542
2543 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2544 JVMWrapper("JVM_GetMethodIxArgsSize");
2545 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2546 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2547 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2548 return method->size_of_parameters();
2549 JVM_END
2550
2551
2552 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2553 JVMWrapper("JVM_GetMethodIxMaxStack");
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2556 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2557 return method->verifier_max_stack();
2558 JVM_END
2559
2560
2561 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2562 JVMWrapper("JVM_IsConstructorIx");
2563 ResourceMark rm(THREAD);
2564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2565 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2566 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2567 return method->name() == vmSymbols::object_initializer_name();
2568 JVM_END
2569
2570
2571 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2572 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2573 ResourceMark rm(THREAD);
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2577 return method->is_overpass();
2578 JVM_END
2579
2580 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2581 JVMWrapper("JVM_GetMethodIxIxUTF");
2582 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2583 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2584 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2585 return method->name()->as_utf8();
2586 JVM_END
2587
2588
2589 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2590 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2591 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2592 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2593 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2594 return method->signature()->as_utf8();
2595 JVM_END
2596
2597 /**
2598 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2599 * read entries in the constant pool. Since the old verifier always
2600 * works on a copy of the code, it will not see any rewriting that
2601 * may possibly occur in the middle of verification. So it is important
2602 * that nothing it calls tries to use the cpCache instead of the raw
2603 * constant pool, so we must use cp->uncached_x methods when appropriate.
2604 */
2605 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2606 JVMWrapper("JVM_GetCPFieldNameUTF");
2607 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2608 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2609 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2610 switch (cp->tag_at(cp_index).value()) {
2611 case JVM_CONSTANT_Fieldref:
2612 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2613 default:
2614 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2615 }
2616 ShouldNotReachHere();
2617 return NULL;
2618 JVM_END
2619
2620
2621 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2622 JVMWrapper("JVM_GetCPMethodNameUTF");
2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2625 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2626 switch (cp->tag_at(cp_index).value()) {
2627 case JVM_CONSTANT_InterfaceMethodref:
2628 case JVM_CONSTANT_Methodref:
2629 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2630 default:
2631 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2632 }
2633 ShouldNotReachHere();
2634 return NULL;
2635 JVM_END
2636
2637
2638 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2639 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2640 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2641 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2642 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2643 switch (cp->tag_at(cp_index).value()) {
2644 case JVM_CONSTANT_InterfaceMethodref:
2645 case JVM_CONSTANT_Methodref:
2646 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2647 default:
2648 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2649 }
2650 ShouldNotReachHere();
2651 return NULL;
2652 JVM_END
2653
2654
2655 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2656 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2657 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2658 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2659 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2660 switch (cp->tag_at(cp_index).value()) {
2661 case JVM_CONSTANT_Fieldref:
2662 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2663 default:
2664 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2665 }
2666 ShouldNotReachHere();
2667 return NULL;
2668 JVM_END
2669
2670
2671 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2672 JVMWrapper("JVM_GetCPClassNameUTF");
2673 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2674 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2675 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2676 Symbol* classname = cp->klass_name_at(cp_index);
2677 return classname->as_utf8();
2678 JVM_END
2679
2680
2681 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2682 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2683 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2684 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2685 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2686 switch (cp->tag_at(cp_index).value()) {
2687 case JVM_CONSTANT_Fieldref: {
2688 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2689 Symbol* classname = cp->klass_name_at(class_index);
2690 return classname->as_utf8();
2691 }
2692 default:
2693 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2694 }
2695 ShouldNotReachHere();
2696 return NULL;
2697 JVM_END
2698
2699
2700 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2701 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2702 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2703 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2704 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2705 switch (cp->tag_at(cp_index).value()) {
2706 case JVM_CONSTANT_Methodref:
2707 case JVM_CONSTANT_InterfaceMethodref: {
2708 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2709 Symbol* classname = cp->klass_name_at(class_index);
2710 return classname->as_utf8();
2711 }
2712 default:
2713 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2714 }
2715 ShouldNotReachHere();
2716 return NULL;
2717 JVM_END
2718
2719
2720 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2721 JVMWrapper("JVM_GetCPFieldModifiers");
2722 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2723 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2724 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2725 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2726 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2727 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2728 switch (cp->tag_at(cp_index).value()) {
2729 case JVM_CONSTANT_Fieldref: {
2730 Symbol* name = cp->uncached_name_ref_at(cp_index);
2731 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2732 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2733 if (fs.name() == name && fs.signature() == signature) {
2734 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2735 }
2736 }
2737 return -1;
2738 }
2739 default:
2740 fatal("JVM_GetCPFieldModifiers: illegal constant");
2741 }
2742 ShouldNotReachHere();
2743 return 0;
2744 JVM_END
2745
2746
2747 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2748 JVMWrapper("JVM_GetCPMethodModifiers");
2749 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2750 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2751 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2752 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2753 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2754 switch (cp->tag_at(cp_index).value()) {
2755 case JVM_CONSTANT_Methodref:
2756 case JVM_CONSTANT_InterfaceMethodref: {
2757 Symbol* name = cp->uncached_name_ref_at(cp_index);
2758 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2759 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2760 int methods_count = methods->length();
2761 for (int i = 0; i < methods_count; i++) {
2762 Method* method = methods->at(i);
2763 if (method->name() == name && method->signature() == signature) {
2764 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2765 }
2766 }
2767 return -1;
2768 }
2769 default:
2770 fatal("JVM_GetCPMethodModifiers: illegal constant");
2771 }
2772 ShouldNotReachHere();
2773 return 0;
2774 JVM_END
2775
2776
2777 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2778
2779 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2780 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2781 JVM_END
2782
2783
2784 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2785 JVMWrapper("JVM_IsSameClassPackage");
2786 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2787 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2788 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2789 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2790 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2791 JVM_END
2792
2793
2794 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2795
2796 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2797 JVMWrapper2("JVM_Open (%s)", fname);
2798
2799 //%note jvm_r6
2800 int result = os::open(fname, flags, mode);
2801 if (result >= 0) {
2802 return result;
2803 } else {
2804 switch(errno) {
2805 case EEXIST:
2806 return JVM_EEXIST;
2807 default:
2808 return -1;
2809 }
2810 }
2811 JVM_END
2812
2813
2814 JVM_LEAF(jint, JVM_Close(jint fd))
2815 JVMWrapper2("JVM_Close (0x%x)", fd);
2816 //%note jvm_r6
2817 return os::close(fd);
2818 JVM_END
2819
2820
2821 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2822 JVMWrapper2("JVM_Read (0x%x)", fd);
2823
2824 //%note jvm_r6
2825 return (jint)os::restartable_read(fd, buf, nbytes);
2826 JVM_END
2827
2828
2829 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2830 JVMWrapper2("JVM_Write (0x%x)", fd);
2831
2832 //%note jvm_r6
2833 return (jint)os::write(fd, buf, nbytes);
2834 JVM_END
2835
2836
2837 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2838 JVMWrapper2("JVM_Available (0x%x)", fd);
2839 //%note jvm_r6
2840 return os::available(fd, pbytes);
2841 JVM_END
2842
2843
2844 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2845 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2846 //%note jvm_r6
2847 return os::lseek(fd, offset, whence);
2848 JVM_END
2849
2850
2851 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2852 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2853 return os::ftruncate(fd, length);
2854 JVM_END
2855
2856
2857 JVM_LEAF(jint, JVM_Sync(jint fd))
2858 JVMWrapper2("JVM_Sync (0x%x)", fd);
2859 //%note jvm_r6
2860 return os::fsync(fd);
2861 JVM_END
2862
2863
2864 // Printing support //////////////////////////////////////////////////
2865 extern "C" {
2866
2867 ATTRIBUTE_PRINTF(3, 0)
2868 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2869 // see bug 4399518, 4417214
2870 if ((intptr_t)count <= 0) return -1;
2871 return vsnprintf(str, count, fmt, args);
2872 }
2873
2874 ATTRIBUTE_PRINTF(3, 0)
2875 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2876 va_list args;
2877 int len;
2878 va_start(args, fmt);
2879 len = jio_vsnprintf(str, count, fmt, args);
2880 va_end(args);
2881 return len;
2882 }
2883
2884 ATTRIBUTE_PRINTF(2,3)
2885 int jio_fprintf(FILE* f, const char *fmt, ...) {
2886 int len;
2887 va_list args;
2888 va_start(args, fmt);
2889 len = jio_vfprintf(f, fmt, args);
2890 va_end(args);
2891 return len;
2892 }
2893
2894 ATTRIBUTE_PRINTF(2, 0)
2895 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2896 if (Arguments::vfprintf_hook() != NULL) {
2897 return Arguments::vfprintf_hook()(f, fmt, args);
2898 } else {
2899 return vfprintf(f, fmt, args);
2900 }
2901 }
2902
2903 ATTRIBUTE_PRINTF(1, 2)
2904 JNIEXPORT int jio_printf(const char *fmt, ...) {
2905 int len;
2906 va_list args;
2907 va_start(args, fmt);
2908 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2909 va_end(args);
2910 return len;
2911 }
2912
2913
2914 // HotSpot specific jio method
2915 void jio_print(const char* s) {
2916 // Try to make this function as atomic as possible.
2917 if (Arguments::vfprintf_hook() != NULL) {
2918 jio_fprintf(defaultStream::output_stream(), "%s", s);
2919 } else {
2920 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2921 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2922 }
2923 }
2924
2925 } // Extern C
2926
2927 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2928
2929 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2930 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2931 // OSThread objects. The exception to this rule is when the target object is the thread
2932 // doing the operation, in which case we know that the thread won't exit until the
2933 // operation is done (all exits being voluntary). There are a few cases where it is
2934 // rather silly to do operations on yourself, like resuming yourself or asking whether
2935 // you are alive. While these can still happen, they are not subject to deadlocks if
2936 // the lock is held while the operation occurs (this is not the case for suspend, for
2937 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2938 // implementation is local to this file, we always lock Threads_lock for that one.
2939
2940 static void thread_entry(JavaThread* thread, TRAPS) {
2941 HandleMark hm(THREAD);
2942 Handle obj(THREAD, thread->threadObj());
2943 JavaValue result(T_VOID);
2944 JavaCalls::call_virtual(&result,
2945 obj,
2946 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2947 vmSymbols::run_method_name(),
2948 vmSymbols::void_method_signature(),
2949 THREAD);
2950 }
2951
2952
2953 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2954 JVMWrapper("JVM_StartThread");
2955 JavaThread *native_thread = NULL;
2956
2957 // We cannot hold the Threads_lock when we throw an exception,
2958 // due to rank ordering issues. Example: we might need to grab the
2959 // Heap_lock while we construct the exception.
2960 bool throw_illegal_thread_state = false;
2961
2962 // We must release the Threads_lock before we can post a jvmti event
2963 // in Thread::start.
2964 {
2965 // Ensure that the C++ Thread and OSThread structures aren't freed before
2966 // we operate.
2967 MutexLocker mu(Threads_lock);
2968
2969 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2970 // re-starting an already started thread, so we should usually find
2971 // that the JavaThread is null. However for a JNI attached thread
2972 // there is a small window between the Thread object being created
2973 // (with its JavaThread set) and the update to its threadStatus, so we
2974 // have to check for this
2975 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2976 throw_illegal_thread_state = true;
2977 } else {
2978 // We could also check the stillborn flag to see if this thread was already stopped, but
2979 // for historical reasons we let the thread detect that itself when it starts running
2980
2981 jlong size =
2982 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2983 // Allocate the C++ Thread structure and create the native thread. The
2984 // stack size retrieved from java is signed, but the constructor takes
2985 // size_t (an unsigned type), so avoid passing negative values which would
2986 // result in really large stacks.
2987 size_t sz = size > 0 ? (size_t) size : 0;
2988 native_thread = new JavaThread(&thread_entry, sz);
2989
2990 // At this point it may be possible that no osthread was created for the
2991 // JavaThread due to lack of memory. Check for this situation and throw
2992 // an exception if necessary. Eventually we may want to change this so
2993 // that we only grab the lock if the thread was created successfully -
2994 // then we can also do this check and throw the exception in the
2995 // JavaThread constructor.
2996 if (native_thread->osthread() != NULL) {
2997 // Note: the current thread is not being used within "prepare".
2998 native_thread->prepare(jthread);
2999 }
3000 }
3001 }
3002
3003 if (throw_illegal_thread_state) {
3004 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3005 }
3006
3007 assert(native_thread != NULL, "Starting null thread?");
3008
3009 if (native_thread->osthread() == NULL) {
3010 // No one should hold a reference to the 'native_thread'.
3011 delete native_thread;
3012 if (JvmtiExport::should_post_resource_exhausted()) {
3013 JvmtiExport::post_resource_exhausted(
3014 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3015 "unable to create new native thread");
3016 }
3017 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3018 "unable to create new native thread");
3019 }
3020
3021 Thread::start(native_thread);
3022
3023 JVM_END
3024
3025 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3026 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3027 // but is thought to be reliable and simple. In the case, where the receiver is the
3028 // same thread as the sender, no safepoint is needed.
3029 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3030 JVMWrapper("JVM_StopThread");
3031
3032 oop java_throwable = JNIHandles::resolve(throwable);
3033 if (java_throwable == NULL) {
3034 THROW(vmSymbols::java_lang_NullPointerException());
3035 }
3036 oop java_thread = JNIHandles::resolve_non_null(jthread);
3037 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3038 Events::log_exception(JavaThread::current(),
3039 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3040 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3041 // First check if thread is alive
3042 if (receiver != NULL) {
3043 // Check if exception is getting thrown at self (use oop equality, since the
3044 // target object might exit)
3045 if (java_thread == thread->threadObj()) {
3046 THROW_OOP(java_throwable);
3047 } else {
3048 // Enques a VM_Operation to stop all threads and then deliver the exception...
3049 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3050 }
3051 }
3052 else {
3053 // Either:
3054 // - target thread has not been started before being stopped, or
3055 // - target thread already terminated
3056 // We could read the threadStatus to determine which case it is
3057 // but that is overkill as it doesn't matter. We must set the
3058 // stillborn flag for the first case, and if the thread has already
3059 // exited setting this flag has no affect
3060 java_lang_Thread::set_stillborn(java_thread);
3061 }
3062 JVM_END
3063
3064
3065 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3066 JVMWrapper("JVM_IsThreadAlive");
3067
3068 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3069 return java_lang_Thread::is_alive(thread_oop);
3070 JVM_END
3071
3072
3073 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3074 JVMWrapper("JVM_SuspendThread");
3075 oop java_thread = JNIHandles::resolve_non_null(jthread);
3076 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3077
3078 if (receiver != NULL) {
3079 // thread has run and has not exited (still on threads list)
3080
3081 {
3082 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3083 if (receiver->is_external_suspend()) {
3084 // Don't allow nested external suspend requests. We can't return
3085 // an error from this interface so just ignore the problem.
3086 return;
3087 }
3088 if (receiver->is_exiting()) { // thread is in the process of exiting
3089 return;
3090 }
3091 receiver->set_external_suspend();
3092 }
3093
3094 // java_suspend() will catch threads in the process of exiting
3095 // and will ignore them.
3096 receiver->java_suspend();
3097
3098 // It would be nice to have the following assertion in all the
3099 // time, but it is possible for a racing resume request to have
3100 // resumed this thread right after we suspended it. Temporarily
3101 // enable this assertion if you are chasing a different kind of
3102 // bug.
3103 //
3104 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3105 // receiver->is_being_ext_suspended(), "thread is not suspended");
3106 }
3107 JVM_END
3108
3109
3110 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3111 JVMWrapper("JVM_ResumeThread");
3112 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3113 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3114 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3115 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3116 // looks at it.
3117 MutexLocker ml(Threads_lock);
3118 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3119 if (thr != NULL) {
3120 // the thread has run and is not in the process of exiting
3121 thr->java_resume();
3122 }
3123 JVM_END
3124
3125
3126 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3127 JVMWrapper("JVM_SetThreadPriority");
3128 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3129 MutexLocker ml(Threads_lock);
3130 oop java_thread = JNIHandles::resolve_non_null(jthread);
3131 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3132 JavaThread* thr = java_lang_Thread::thread(java_thread);
3133 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3134 Thread::set_priority(thr, (ThreadPriority)prio);
3135 }
3136 JVM_END
3137
3138
3139 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3140 JVMWrapper("JVM_Yield");
3141 if (os::dont_yield()) return;
3142 #ifndef USDT2
3143 HS_DTRACE_PROBE0(hotspot, thread__yield);
3144 #else /* USDT2 */
3145 HOTSPOT_THREAD_YIELD();
3146 #endif /* USDT2 */
3147 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3148 // Critical for similar threading behaviour
3149 if (ConvertYieldToSleep) {
3150 os::sleep(thread, MinSleepInterval, false);
3151 } else {
3152 os::yield();
3153 }
3154 JVM_END
3155
3156
3157 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3158 JVMWrapper("JVM_Sleep");
3159
3160 if (millis < 0) {
3161 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3162 }
3163
3164 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3165 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3166 }
3167
3168 // Save current thread state and restore it at the end of this block.
3169 // And set new thread state to SLEEPING.
3170 JavaThreadSleepState jtss(thread);
3171
3172 #ifndef USDT2
3173 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3174 #else /* USDT2 */
3175 HOTSPOT_THREAD_SLEEP_BEGIN(
3176 millis);
3177 #endif /* USDT2 */
3178
3179 EventThreadSleep event;
3180
3181 if (millis == 0) {
3182 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3183 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3184 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3185 // for SOLARIS
3186 if (ConvertSleepToYield) {
3187 os::yield();
3188 } else {
3189 ThreadState old_state = thread->osthread()->get_state();
3190 thread->osthread()->set_state(SLEEPING);
3191 os::sleep(thread, MinSleepInterval, false);
3192 thread->osthread()->set_state(old_state);
3193 }
3194 } else {
3195 ThreadState old_state = thread->osthread()->get_state();
3196 thread->osthread()->set_state(SLEEPING);
3197 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3198 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3199 // us while we were sleeping. We do not overwrite those.
3200 if (!HAS_PENDING_EXCEPTION) {
3201 if (event.should_commit()) {
3202 event.set_time(millis);
3203 event.commit();
3204 }
3205 #ifndef USDT2
3206 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3207 #else /* USDT2 */
3208 HOTSPOT_THREAD_SLEEP_END(
3209 1);
3210 #endif /* USDT2 */
3211 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3212 // to properly restore the thread state. That's likely wrong.
3213 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3214 }
3215 }
3216 thread->osthread()->set_state(old_state);
3217 }
3218 if (event.should_commit()) {
3219 event.set_time(millis);
3220 event.commit();
3221 }
3222 #ifndef USDT2
3223 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3224 #else /* USDT2 */
3225 HOTSPOT_THREAD_SLEEP_END(
3226 0);
3227 #endif /* USDT2 */
3228 JVM_END
3229
3230 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3231 JVMWrapper("JVM_CurrentThread");
3232 oop jthread = thread->threadObj();
3233 assert (thread != NULL, "no current thread!");
3234 return JNIHandles::make_local(env, jthread);
3235 JVM_END
3236
3237
3238 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3239 JVMWrapper("JVM_CountStackFrames");
3240
3241 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3242 oop java_thread = JNIHandles::resolve_non_null(jthread);
3243 bool throw_illegal_thread_state = false;
3244 int count = 0;
3245
3246 {
3247 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3248 // We need to re-resolve the java_thread, since a GC might have happened during the
3249 // acquire of the lock
3250 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3251
3252 if (thr == NULL) {
3253 // do nothing
3254 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3255 // Check whether this java thread has been suspended already. If not, throws
3256 // IllegalThreadStateException. We defer to throw that exception until
3257 // Threads_lock is released since loading exception class has to leave VM.
3258 // The correct way to test a thread is actually suspended is
3259 // wait_for_ext_suspend_completion(), but we can't call that while holding
3260 // the Threads_lock. The above tests are sufficient for our purposes
3261 // provided the walkability of the stack is stable - which it isn't
3262 // 100% but close enough for most practical purposes.
3263 throw_illegal_thread_state = true;
3264 } else {
3265 // Count all java activation, i.e., number of vframes
3266 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3267 // Native frames are not counted
3268 if (!vfst.method()->is_native()) count++;
3269 }
3270 }
3271 }
3272
3273 if (throw_illegal_thread_state) {
3274 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3275 "this thread is not suspended");
3276 }
3277 return count;
3278 JVM_END
3279
3280 // Consider: A better way to implement JVM_Interrupt() is to acquire
3281 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3282 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3283 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3284 // outside the critical section. Threads_lock is hot so we want to minimize
3285 // the hold-time. A cleaner interface would be to decompose interrupt into
3286 // two steps. The 1st phase, performed under Threads_lock, would return
3287 // a closure that'd be invoked after Threads_lock was dropped.
3288 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3289 // admit spurious wakeups.
3290
3291 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3292 JVMWrapper("JVM_Interrupt");
3293
3294 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3295 oop java_thread = JNIHandles::resolve_non_null(jthread);
3296 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3297 // We need to re-resolve the java_thread, since a GC might have happened during the
3298 // acquire of the lock
3299 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3300 if (thr != NULL) {
3301 Thread::interrupt(thr);
3302 }
3303 JVM_END
3304
3305
3306 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3307 JVMWrapper("JVM_IsInterrupted");
3308
3309 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3310 oop java_thread = JNIHandles::resolve_non_null(jthread);
3311 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3312 // We need to re-resolve the java_thread, since a GC might have happened during the
3313 // acquire of the lock
3314 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3315 if (thr == NULL) {
3316 return JNI_FALSE;
3317 } else {
3318 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3319 }
3320 JVM_END
3321
3322
3323 // Return true iff the current thread has locked the object passed in
3324
3325 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3326 JVMWrapper("JVM_HoldsLock");
3327 assert(THREAD->is_Java_thread(), "sanity check");
3328 if (obj == NULL) {
3329 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3330 }
3331 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3332 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3333 JVM_END
3334
3335
3336 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3337 JVMWrapper("JVM_DumpAllStacks");
3338 VM_PrintThreads op;
3339 VMThread::execute(&op);
3340 if (JvmtiExport::should_post_data_dump()) {
3341 JvmtiExport::post_data_dump();
3342 }
3343 JVM_END
3344
3345 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3346 JVMWrapper("JVM_SetNativeThreadName");
3347 ResourceMark rm(THREAD);
3348 oop java_thread = JNIHandles::resolve_non_null(jthread);
3349 JavaThread* thr = java_lang_Thread::thread(java_thread);
3350 // Thread naming only supported for the current thread, doesn't work for
3351 // target threads.
3352 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3353 // we don't set the name of an attached thread to avoid stepping
3354 // on other programs
3355 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3356 os::set_native_thread_name(thread_name);
3357 }
3358 JVM_END
3359
3360 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3361
3362 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3363 assert(jthread->is_Java_thread(), "must be a Java thread");
3364 if (jthread->privileged_stack_top() == NULL) return false;
3365 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3366 oop loader = jthread->privileged_stack_top()->class_loader();
3367 if (loader == NULL) return true;
3368 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3369 if (trusted) return true;
3370 }
3371 return false;
3372 }
3373
3374 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3375 JVMWrapper("JVM_CurrentLoadedClass");
3376 ResourceMark rm(THREAD);
3377
3378 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3379 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3380 bool trusted = is_trusted_frame(thread, &vfst);
3381 if (trusted) return NULL;
3382
3383 Method* m = vfst.method();
3384 if (!m->is_native()) {
3385 InstanceKlass* holder = m->method_holder();
3386 oop loader = holder->class_loader();
3387 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3388 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3389 }
3390 }
3391 }
3392 return NULL;
3393 JVM_END
3394
3395
3396 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3397 JVMWrapper("JVM_CurrentClassLoader");
3398 ResourceMark rm(THREAD);
3399
3400 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3401
3402 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3403 bool trusted = is_trusted_frame(thread, &vfst);
3404 if (trusted) return NULL;
3405
3406 Method* m = vfst.method();
3407 if (!m->is_native()) {
3408 InstanceKlass* holder = m->method_holder();
3409 assert(holder->is_klass(), "just checking");
3410 oop loader = holder->class_loader();
3411 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3412 return JNIHandles::make_local(env, loader);
3413 }
3414 }
3415 }
3416 return NULL;
3417 JVM_END
3418
3419
3420 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3421 JVMWrapper("JVM_GetClassContext");
3422 ResourceMark rm(THREAD);
3423 JvmtiVMObjectAllocEventCollector oam;
3424 vframeStream vfst(thread);
3425
3426 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3427 // This must only be called from SecurityManager.getClassContext
3428 Method* m = vfst.method();
3429 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3430 m->name() == vmSymbols::getClassContext_name() &&
3431 m->signature() == vmSymbols::void_class_array_signature())) {
3432 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3433 }
3434 }
3435
3436 // Collect method holders
3437 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3438 for (; !vfst.at_end(); vfst.security_next()) {
3439 Method* m = vfst.method();
3440 // Native frames are not returned
3441 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3442 Klass* holder = m->method_holder();
3443 assert(holder->is_klass(), "just checking");
3444 klass_array->append(holder);
3445 }
3446 }
3447
3448 // Create result array of type [Ljava/lang/Class;
3449 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3450 // Fill in mirrors corresponding to method holders
3451 for (int i = 0; i < klass_array->length(); i++) {
3452 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3453 }
3454
3455 return (jobjectArray) JNIHandles::make_local(env, result);
3456 JVM_END
3457
3458
3459 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3460 JVMWrapper("JVM_ClassDepth");
3461 ResourceMark rm(THREAD);
3462 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3463 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3464
3465 const char* str = java_lang_String::as_utf8_string(class_name_str());
3466 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3467 if (class_name_sym == NULL) {
3468 return -1;
3469 }
3470
3471 int depth = 0;
3472
3473 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3474 if (!vfst.method()->is_native()) {
3475 InstanceKlass* holder = vfst.method()->method_holder();
3476 assert(holder->is_klass(), "just checking");
3477 if (holder->name() == class_name_sym) {
3478 return depth;
3479 }
3480 depth++;
3481 }
3482 }
3483 return -1;
3484 JVM_END
3485
3486
3487 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3488 JVMWrapper("JVM_ClassLoaderDepth");
3489 ResourceMark rm(THREAD);
3490 int depth = 0;
3491 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3492 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3493 bool trusted = is_trusted_frame(thread, &vfst);
3494 if (trusted) return -1;
3495
3496 Method* m = vfst.method();
3497 if (!m->is_native()) {
3498 InstanceKlass* holder = m->method_holder();
3499 assert(holder->is_klass(), "just checking");
3500 oop loader = holder->class_loader();
3501 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3502 return depth;
3503 }
3504 depth++;
3505 }
3506 }
3507 return -1;
3508 JVM_END
3509
3510
3511 // java.lang.Package ////////////////////////////////////////////////////////////////
3512
3513
3514 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3515 JVMWrapper("JVM_GetSystemPackage");
3516 ResourceMark rm(THREAD);
3517 JvmtiVMObjectAllocEventCollector oam;
3518 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3519 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3520 return (jstring) JNIHandles::make_local(result);
3521 JVM_END
3522
3523
3524 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3525 JVMWrapper("JVM_GetSystemPackages");
3526 JvmtiVMObjectAllocEventCollector oam;
3527 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3528 return (jobjectArray) JNIHandles::make_local(result);
3529 JVM_END
3530
3531
3532 // ObjectInputStream ///////////////////////////////////////////////////////////////
3533
3534 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3535 if (current_class == NULL) {
3536 return true;
3537 }
3538 if ((current_class == field_class) || access.is_public()) {
3539 return true;
3540 }
3541
3542 if (access.is_protected()) {
3543 // See if current_class is a subclass of field_class
3544 if (current_class->is_subclass_of(field_class)) {
3545 return true;
3546 }
3547 }
3548
3549 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3550 }
3551
3552
3553 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3554 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3555 JVMWrapper("JVM_AllocateNewObject");
3556 JvmtiVMObjectAllocEventCollector oam;
3557 // Receiver is not used
3558 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3559 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3560
3561 // Cannot instantiate primitive types
3562 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3563 ResourceMark rm(THREAD);
3564 THROW_0(vmSymbols::java_lang_InvalidClassException());
3565 }
3566
3567 // Arrays not allowed here, must use JVM_AllocateNewArray
3568 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3569 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3570 ResourceMark rm(THREAD);
3571 THROW_0(vmSymbols::java_lang_InvalidClassException());
3572 }
3573
3574 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3575 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3576
3577 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3578
3579 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3580 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3581
3582 // Make sure klass is initialized, since we are about to instantiate one of them.
3583 curr_klass->initialize(CHECK_NULL);
3584
3585 methodHandle m (THREAD,
3586 init_klass->find_method(vmSymbols::object_initializer_name(),
3587 vmSymbols::void_method_signature()));
3588 if (m.is_null()) {
3589 ResourceMark rm(THREAD);
3590 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3591 Method::name_and_sig_as_C_string(init_klass(),
3592 vmSymbols::object_initializer_name(),
3593 vmSymbols::void_method_signature()));
3594 }
3595
3596 if (curr_klass == init_klass && !m->is_public()) {
3597 // Calling the constructor for class 'curr_klass'.
3598 // Only allow calls to a public no-arg constructor.
3599 // This path corresponds to creating an Externalizable object.
3600 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3601 }
3602
3603 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3604 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3605 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3606 }
3607
3608 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3609 // Call constructor m. This might call a constructor higher up in the hierachy
3610 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3611
3612 return JNIHandles::make_local(obj());
3613 JVM_END
3614
3615
3616 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3617 JVMWrapper("JVM_AllocateNewArray");
3618 JvmtiVMObjectAllocEventCollector oam;
3619 oop mirror = JNIHandles::resolve_non_null(currClass);
3620
3621 if (java_lang_Class::is_primitive(mirror)) {
3622 THROW_0(vmSymbols::java_lang_InvalidClassException());
3623 }
3624 Klass* k = java_lang_Class::as_Klass(mirror);
3625 oop result;
3626
3627 if (k->oop_is_typeArray()) {
3628 // typeArray
3629 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3630 } else if (k->oop_is_objArray()) {
3631 // objArray
3632 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3633 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3634 result = oak->allocate(length, CHECK_NULL);
3635 } else {
3636 THROW_0(vmSymbols::java_lang_InvalidClassException());
3637 }
3638 return JNIHandles::make_local(env, result);
3639 JVM_END
3640
3641
3642 // Return the first non-null class loader up the execution stack, or null
3643 // if only code from the null class loader is on the stack.
3644
3645 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3646 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3647 // UseNewReflection
3648 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3649 oop loader = vfst.method()->method_holder()->class_loader();
3650 if (loader != NULL) {
3651 return JNIHandles::make_local(env, loader);
3652 }
3653 }
3654 return NULL;
3655 JVM_END
3656
3657
3658 // Load a class relative to the most recent class on the stack with a non-null
3659 // classloader.
3660 // This function has been deprecated and should not be considered part of the
3661 // specified JVM interface.
3662
3663 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3664 jclass currClass, jstring currClassName))
3665 JVMWrapper("JVM_LoadClass0");
3666 // Receiver is not used
3667 ResourceMark rm(THREAD);
3668
3669 // Class name argument is not guaranteed to be in internal format
3670 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3671 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3672
3673 const char* str = java_lang_String::as_utf8_string(string());
3674
3675 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3676 // It's impossible to create this class; the name cannot fit
3677 // into the constant pool.
3678 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3679 }
3680
3681 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3682 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3683 // Find the most recent class on the stack with a non-null classloader
3684 oop loader = NULL;
3685 oop protection_domain = NULL;
3686 if (curr_klass.is_null()) {
3687 for (vframeStream vfst(thread);
3688 !vfst.at_end() && loader == NULL;
3689 vfst.next()) {
3690 if (!vfst.method()->is_native()) {
3691 InstanceKlass* holder = vfst.method()->method_holder();
3692 loader = holder->class_loader();
3693 protection_domain = holder->protection_domain();
3694 }
3695 }
3696 } else {
3697 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3698 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3699 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3700 }
3701 Handle h_loader(THREAD, loader);
3702 Handle h_prot (THREAD, protection_domain);
3703 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3704 false, thread);
3705 if (TraceClassResolution && result != NULL) {
3706 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3707 }
3708 return result;
3709 JVM_END
3710
3711
3712 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3713
3714
3715 // resolve array handle and check arguments
3716 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3717 if (arr == NULL) {
3718 THROW_0(vmSymbols::java_lang_NullPointerException());
3719 }
3720 oop a = JNIHandles::resolve_non_null(arr);
3721 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3722 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3723 }
3724 return arrayOop(a);
3725 }
3726
3727
3728 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3729 JVMWrapper("JVM_GetArrayLength");
3730 arrayOop a = check_array(env, arr, false, CHECK_0);
3731 return a->length();
3732 JVM_END
3733
3734
3735 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3736 JVMWrapper("JVM_Array_Get");
3737 JvmtiVMObjectAllocEventCollector oam;
3738 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3739 jvalue value;
3740 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3741 oop box = Reflection::box(&value, type, CHECK_NULL);
3742 return JNIHandles::make_local(env, box);
3743 JVM_END
3744
3745
3746 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3747 JVMWrapper("JVM_GetPrimitiveArrayElement");
3748 jvalue value;
3749 value.i = 0; // to initialize value before getting used in CHECK
3750 arrayOop a = check_array(env, arr, true, CHECK_(value));
3751 assert(a->is_typeArray(), "just checking");
3752 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3753 BasicType wide_type = (BasicType) wCode;
3754 if (type != wide_type) {
3755 Reflection::widen(&value, type, wide_type, CHECK_(value));
3756 }
3757 return value;
3758 JVM_END
3759
3760
3761 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3762 JVMWrapper("JVM_SetArrayElement");
3763 arrayOop a = check_array(env, arr, false, CHECK);
3764 oop box = JNIHandles::resolve(val);
3765 jvalue value;
3766 value.i = 0; // to initialize value before getting used in CHECK
3767 BasicType value_type;
3768 if (a->is_objArray()) {
3769 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3770 value_type = Reflection::unbox_for_regular_object(box, &value);
3771 } else {
3772 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3773 }
3774 Reflection::array_set(&value, a, index, value_type, CHECK);
3775 JVM_END
3776
3777
3778 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3779 JVMWrapper("JVM_SetPrimitiveArrayElement");
3780 arrayOop a = check_array(env, arr, true, CHECK);
3781 assert(a->is_typeArray(), "just checking");
3782 BasicType value_type = (BasicType) vCode;
3783 Reflection::array_set(&v, a, index, value_type, CHECK);
3784 JVM_END
3785
3786
3787 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3788 JVMWrapper("JVM_NewArray");
3789 JvmtiVMObjectAllocEventCollector oam;
3790 oop element_mirror = JNIHandles::resolve(eltClass);
3791 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3792 return JNIHandles::make_local(env, result);
3793 JVM_END
3794
3795
3796 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3797 JVMWrapper("JVM_NewMultiArray");
3798 JvmtiVMObjectAllocEventCollector oam;
3799 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3800 oop element_mirror = JNIHandles::resolve(eltClass);
3801 assert(dim_array->is_typeArray(), "just checking");
3802 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3803 return JNIHandles::make_local(env, result);
3804 JVM_END
3805
3806
3807 // Networking library support ////////////////////////////////////////////////////////////////////
3808
3809 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3810 JVMWrapper("JVM_InitializeSocketLibrary");
3811 return 0;
3812 JVM_END
3813
3814
3815 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3816 JVMWrapper("JVM_Socket");
3817 return os::socket(domain, type, protocol);
3818 JVM_END
3819
3820
3821 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3822 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3823 //%note jvm_r6
3824 return os::socket_close(fd);
3825 JVM_END
3826
3827
3828 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3829 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3830 //%note jvm_r6
3831 return os::socket_shutdown(fd, howto);
3832 JVM_END
3833
3834
3835 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3836 JVMWrapper2("JVM_Recv (0x%x)", fd);
3837 //%note jvm_r6
3838 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3839 JVM_END
3840
3841
3842 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3843 JVMWrapper2("JVM_Send (0x%x)", fd);
3844 //%note jvm_r6
3845 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3846 JVM_END
3847
3848
3849 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3850 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3851 //%note jvm_r6
3852 return os::timeout(fd, timeout);
3853 JVM_END
3854
3855
3856 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3857 JVMWrapper2("JVM_Listen (0x%x)", fd);
3858 //%note jvm_r6
3859 return os::listen(fd, count);
3860 JVM_END
3861
3862
3863 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3864 JVMWrapper2("JVM_Connect (0x%x)", fd);
3865 //%note jvm_r6
3866 return os::connect(fd, him, (socklen_t)len);
3867 JVM_END
3868
3869
3870 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3871 JVMWrapper2("JVM_Bind (0x%x)", fd);
3872 //%note jvm_r6
3873 return os::bind(fd, him, (socklen_t)len);
3874 JVM_END
3875
3876
3877 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3878 JVMWrapper2("JVM_Accept (0x%x)", fd);
3879 //%note jvm_r6
3880 socklen_t socklen = (socklen_t)(*len);
3881 jint result = os::accept(fd, him, &socklen);
3882 *len = (jint)socklen;
3883 return result;
3884 JVM_END
3885
3886
3887 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3888 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3889 //%note jvm_r6
3890 socklen_t socklen = (socklen_t)(*fromlen);
3891 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3892 *fromlen = (int)socklen;
3893 return result;
3894 JVM_END
3895
3896
3897 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3898 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3899 //%note jvm_r6
3900 socklen_t socklen = (socklen_t)(*len);
3901 jint result = os::get_sock_name(fd, him, &socklen);
3902 *len = (int)socklen;
3903 return result;
3904 JVM_END
3905
3906
3907 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3908 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3909 //%note jvm_r6
3910 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3911 JVM_END
3912
3913
3914 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3915 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3916 //%note jvm_r6
3917 return os::socket_available(fd, pbytes);
3918 JVM_END
3919
3920
3921 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3922 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3923 //%note jvm_r6
3924 socklen_t socklen = (socklen_t)(*optlen);
3925 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3926 *optlen = (int)socklen;
3927 return result;
3928 JVM_END
3929
3930
3931 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3932 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3933 //%note jvm_r6
3934 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3935 JVM_END
3936
3937
3938 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3939 JVMWrapper("JVM_GetHostName");
3940 return os::get_host_name(name, namelen);
3941 JVM_END
3942
3943
3944 // Library support ///////////////////////////////////////////////////////////////////////////
3945
3946 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3947 //%note jvm_ct
3948 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3949 char ebuf[1024];
3950 void *load_result;
3951 {
3952 ThreadToNativeFromVM ttnfvm(thread);
3953 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3954 }
3955 if (load_result == NULL) {
3956 char msg[1024];
3957 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3958 // Since 'ebuf' may contain a string encoded using
3959 // platform encoding scheme, we need to pass
3960 // Exceptions::unsafe_to_utf8 to the new_exception method
3961 // as the last argument. See bug 6367357.
3962 Handle h_exception =
3963 Exceptions::new_exception(thread,
3964 vmSymbols::java_lang_UnsatisfiedLinkError(),
3965 msg, Exceptions::unsafe_to_utf8);
3966
3967 THROW_HANDLE_0(h_exception);
3968 }
3969 return load_result;
3970 JVM_END
3971
3972
3973 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3974 JVMWrapper("JVM_UnloadLibrary");
3975 os::dll_unload(handle);
3976 JVM_END
3977
3978
3979 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3980 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3981 return os::dll_lookup(handle, name);
3982 JVM_END
3983
3984
3985 // Floating point support ////////////////////////////////////////////////////////////////////
3986
3987 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3988 JVMWrapper("JVM_IsNaN");
3989 return g_isnan(a);
3990 JVM_END
3991
3992
3993 // JNI version ///////////////////////////////////////////////////////////////////////////////
3994
3995 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3996 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3997 return Threads::is_supported_jni_version_including_1_1(version);
3998 JVM_END
3999
4000
4001 // String support ///////////////////////////////////////////////////////////////////////////
4002
4003 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4004 JVMWrapper("JVM_InternString");
4005 JvmtiVMObjectAllocEventCollector oam;
4006 if (str == NULL) return NULL;
4007 oop string = JNIHandles::resolve_non_null(str);
4008 oop result = StringTable::intern(string, CHECK_NULL);
4009 return (jstring) JNIHandles::make_local(env, result);
4010 JVM_END
4011
4012
4013 // Raw monitor support //////////////////////////////////////////////////////////////////////
4014
4015 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4016 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4017 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4018 // that only works with java threads.
4019
4020
4021 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4022 VM_Exit::block_if_vm_exited();
4023 JVMWrapper("JVM_RawMonitorCreate");
4024 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4025 }
4026
4027
4028 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4029 VM_Exit::block_if_vm_exited();
4030 JVMWrapper("JVM_RawMonitorDestroy");
4031 delete ((Mutex*) mon);
4032 }
4033
4034
4035 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4036 VM_Exit::block_if_vm_exited();
4037 JVMWrapper("JVM_RawMonitorEnter");
4038 ((Mutex*) mon)->jvm_raw_lock();
4039 return 0;
4040 }
4041
4042
4043 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4044 VM_Exit::block_if_vm_exited();
4045 JVMWrapper("JVM_RawMonitorExit");
4046 ((Mutex*) mon)->jvm_raw_unlock();
4047 }
4048
4049
4050 // Support for Serialization
4051
4052 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4053 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4054 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4055 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4056
4057 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4058 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4059 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4060 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4061
4062
4063 void initialize_converter_functions() {
4064 if (JDK_Version::is_gte_jdk14x_version()) {
4065 // These functions only exist for compatibility with 1.3.1 and earlier
4066 return;
4067 }
4068
4069 // called from universe_post_init()
4070 assert(
4071 int_bits_to_float_fn == NULL &&
4072 long_bits_to_double_fn == NULL &&
4073 float_to_int_bits_fn == NULL &&
4074 double_to_long_bits_fn == NULL ,
4075 "initialization done twice"
4076 );
4077 // initialize
4078 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4079 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4080 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4081 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4082 // verify
4083 assert(
4084 int_bits_to_float_fn != NULL &&
4085 long_bits_to_double_fn != NULL &&
4086 float_to_int_bits_fn != NULL &&
4087 double_to_long_bits_fn != NULL ,
4088 "initialization failed"
4089 );
4090 }
4091
4092
4093
4094 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4095
4096 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4097 Handle loader, Handle protection_domain,
4098 jboolean throwError, TRAPS) {
4099 // Security Note:
4100 // The Java level wrapper will perform the necessary security check allowing
4101 // us to pass the NULL as the initiating class loader. The VM is responsible for
4102 // the checkPackageAccess relative to the initiating class loader via the
4103 // protection_domain. The protection_domain is passed as NULL by the java code
4104 // if there is no security manager in 3-arg Class.forName().
4105 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4106
4107 KlassHandle klass_handle(THREAD, klass);
4108 // Check if we should initialize the class
4109 if (init && klass_handle->oop_is_instance()) {
4110 klass_handle->initialize(CHECK_NULL);
4111 }
4112 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4113 }
4114
4115
4116 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4117
4118 #ifndef PRODUCT
4119
4120 extern "C" {
4121 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4122 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4123 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4124 }
4125
4126 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4127 JVMWrapper("JVM_AccessBoolVMFlag");
4128 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4129 JVM_END
4130
4131 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4132 JVMWrapper("JVM_AccessVMIntFlag");
4133 intx v;
4134 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4135 *value = (jint)v;
4136 return result;
4137 JVM_END
4138
4139
4140 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4141 JVMWrapper("JVM_VMBreakPoint");
4142 oop the_obj = JNIHandles::resolve(obj);
4143 BREAKPOINT;
4144 JVM_END
4145
4146
4147 #endif
4148
4149
4150 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4151
4152 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4153 JVMWrapper("JVM_InvokeMethod");
4154 Handle method_handle;
4155 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4156 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4157 Handle receiver(THREAD, JNIHandles::resolve(obj));
4158 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4159 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4160 jobject res = JNIHandles::make_local(env, result);
4161 if (JvmtiExport::should_post_vm_object_alloc()) {
4162 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4163 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4164 if (java_lang_Class::is_primitive(ret_type)) {
4165 // Only for primitive type vm allocates memory for java object.
4166 // See box() method.
4167 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4168 }
4169 }
4170 return res;
4171 } else {
4172 THROW_0(vmSymbols::java_lang_StackOverflowError());
4173 }
4174 JVM_END
4175
4176
4177 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4178 JVMWrapper("JVM_NewInstanceFromConstructor");
4179 oop constructor_mirror = JNIHandles::resolve(c);
4180 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4181 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4182 jobject res = JNIHandles::make_local(env, result);
4183 if (JvmtiExport::should_post_vm_object_alloc()) {
4184 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4185 }
4186 return res;
4187 JVM_END
4188
4189 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4190
4191 JVM_LEAF(jboolean, JVM_SupportsCX8())
4192 JVMWrapper("JVM_SupportsCX8");
4193 return VM_Version::supports_cx8();
4194 JVM_END
4195
4196
4197 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4198 JVMWrapper("JVM_CX8Field");
4199 jlong res;
4200 oop o = JNIHandles::resolve(obj);
4201 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4202 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4203
4204 assert(VM_Version::supports_cx8(), "cx8 not supported");
4205 res = Atomic::cmpxchg(newVal, addr, oldVal);
4206
4207 return res == oldVal;
4208 JVM_END
4209
4210 // DTrace ///////////////////////////////////////////////////////////////////
4211
4212 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4213 JVMWrapper("JVM_DTraceGetVersion");
4214 return (jint)JVM_TRACING_DTRACE_VERSION;
4215 JVM_END
4216
4217 JVM_ENTRY(jlong,JVM_DTraceActivate(
4218 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4219 JVM_DTraceProvider* providers))
4220 JVMWrapper("JVM_DTraceActivate");
4221 return DTraceJSDT::activate(
4222 version, module_name, providers_count, providers, CHECK_0);
4223 JVM_END
4224
4225 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4226 JVMWrapper("JVM_DTraceIsProbeEnabled");
4227 return DTraceJSDT::is_probe_enabled(method);
4228 JVM_END
4229
4230 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4231 JVMWrapper("JVM_DTraceDispose");
4232 DTraceJSDT::dispose(handle);
4233 JVM_END
4234
4235 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4236 JVMWrapper("JVM_DTraceIsSupported");
4237 return DTraceJSDT::is_supported();
4238 JVM_END
4239
4240 // Returns an array of all live Thread objects (VM internal JavaThreads,
4241 // jvmti agent threads, and JNI attaching threads are skipped)
4242 // See CR 6404306 regarding JNI attaching threads
4243 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4244 ResourceMark rm(THREAD);
4245 ThreadsListEnumerator tle(THREAD, false, false);
4246 JvmtiVMObjectAllocEventCollector oam;
4247
4248 int num_threads = tle.num_threads();
4249 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4250 objArrayHandle threads_ah(THREAD, r);
4251
4252 for (int i = 0; i < num_threads; i++) {
4253 Handle h = tle.get_threadObj(i);
4254 threads_ah->obj_at_put(i, h());
4255 }
4256
4257 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4258 JVM_END
4259
4260
4261 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4262 // Return StackTraceElement[][], each element is the stack trace of a thread in
4263 // the corresponding entry in the given threads array
4264 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4265 JVMWrapper("JVM_DumpThreads");
4266 JvmtiVMObjectAllocEventCollector oam;
4267
4268 // Check if threads is null
4269 if (threads == NULL) {
4270 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4271 }
4272
4273 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4274 objArrayHandle ah(THREAD, a);
4275 int num_threads = ah->length();
4276 // check if threads is non-empty array
4277 if (num_threads == 0) {
4278 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4279 }
4280
4281 // check if threads is not an array of objects of Thread class
4282 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4283 if (k != SystemDictionary::Thread_klass()) {
4284 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4285 }
4286
4287 ResourceMark rm(THREAD);
4288
4289 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4290 for (int i = 0; i < num_threads; i++) {
4291 oop thread_obj = ah->obj_at(i);
4292 instanceHandle h(THREAD, (instanceOop) thread_obj);
4293 thread_handle_array->append(h);
4294 }
4295
4296 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4297 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4298
4299 JVM_END
4300
4301 // JVM monitoring and management support
4302 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4303 return Management::get_jmm_interface(version);
4304 JVM_END
4305
4306 // com.sun.tools.attach.VirtualMachine agent properties support
4307 //
4308 // Initialize the agent properties with the properties maintained in the VM
4309 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4310 JVMWrapper("JVM_InitAgentProperties");
4311 ResourceMark rm;
4312
4313 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4314
4315 PUTPROP(props, "sun.java.command", Arguments::java_command());
4316 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4317 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4318 return properties;
4319 JVM_END
4320
4321 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4322 {
4323 JVMWrapper("JVM_GetEnclosingMethodInfo");
4324 JvmtiVMObjectAllocEventCollector oam;
4325
4326 if (ofClass == NULL) {
4327 return NULL;
4328 }
4329 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4330 // Special handling for primitive objects
4331 if (java_lang_Class::is_primitive(mirror())) {
4332 return NULL;
4333 }
4334 Klass* k = java_lang_Class::as_Klass(mirror());
4335 if (!k->oop_is_instance()) {
4336 return NULL;
4337 }
4338 instanceKlassHandle ik_h(THREAD, k);
4339 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4340 if (encl_method_class_idx == 0) {
4341 return NULL;
4342 }
4343 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4344 objArrayHandle dest(THREAD, dest_o);
4345 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4346 dest->obj_at_put(0, enc_k->java_mirror());
4347 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4348 if (encl_method_method_idx != 0) {
4349 Symbol* sym = ik_h->constants()->symbol_at(
4350 extract_low_short_from_int(
4351 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4352 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4353 dest->obj_at_put(1, str());
4354 sym = ik_h->constants()->symbol_at(
4355 extract_high_short_from_int(
4356 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4357 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4358 dest->obj_at_put(2, str());
4359 }
4360 return (jobjectArray) JNIHandles::make_local(dest());
4361 }
4362 JVM_END
4363
4364 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4365 jint javaThreadState))
4366 {
4367 // If new thread states are added in future JDK and VM versions,
4368 // this should check if the JDK version is compatible with thread
4369 // states supported by the VM. Return NULL if not compatible.
4370 //
4371 // This function must map the VM java_lang_Thread::ThreadStatus
4372 // to the Java thread state that the JDK supports.
4373 //
4374
4375 typeArrayHandle values_h;
4376 switch (javaThreadState) {
4377 case JAVA_THREAD_STATE_NEW : {
4378 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4379 values_h = typeArrayHandle(THREAD, r);
4380 values_h->int_at_put(0, java_lang_Thread::NEW);
4381 break;
4382 }
4383 case JAVA_THREAD_STATE_RUNNABLE : {
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::RUNNABLE);
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_BLOCKED : {
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::BLOCKED_ON_MONITOR_ENTER);
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_WAITING : {
4396 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4397 values_h = typeArrayHandle(THREAD, r);
4398 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4399 values_h->int_at_put(1, java_lang_Thread::PARKED);
4400 break;
4401 }
4402 case JAVA_THREAD_STATE_TIMED_WAITING : {
4403 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4404 values_h = typeArrayHandle(THREAD, r);
4405 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4406 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4407 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4408 break;
4409 }
4410 case JAVA_THREAD_STATE_TERMINATED : {
4411 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4412 values_h = typeArrayHandle(THREAD, r);
4413 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4414 break;
4415 }
4416 default:
4417 // Unknown state - probably incompatible JDK version
4418 return NULL;
4419 }
4420
4421 return (jintArray) JNIHandles::make_local(env, values_h());
4422 }
4423 JVM_END
4424
4425
4426 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4427 jint javaThreadState,
4428 jintArray values))
4429 {
4430 // If new thread states are added in future JDK and VM versions,
4431 // this should check if the JDK version is compatible with thread
4432 // states supported by the VM. Return NULL if not compatible.
4433 //
4434 // This function must map the VM java_lang_Thread::ThreadStatus
4435 // to the Java thread state that the JDK supports.
4436 //
4437
4438 ResourceMark rm;
4439
4440 // Check if threads is null
4441 if (values == NULL) {
4442 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4443 }
4444
4445 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4446 typeArrayHandle values_h(THREAD, v);
4447
4448 objArrayHandle names_h;
4449 switch (javaThreadState) {
4450 case JAVA_THREAD_STATE_NEW : {
4451 assert(values_h->length() == 1 &&
4452 values_h->int_at(0) == java_lang_Thread::NEW,
4453 "Invalid threadStatus value");
4454
4455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4456 1, /* only 1 substate */
4457 CHECK_NULL);
4458 names_h = objArrayHandle(THREAD, r);
4459 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4460 names_h->obj_at_put(0, name());
4461 break;
4462 }
4463 case JAVA_THREAD_STATE_RUNNABLE : {
4464 assert(values_h->length() == 1 &&
4465 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4466 "Invalid threadStatus value");
4467
4468 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4469 1, /* only 1 substate */
4470 CHECK_NULL);
4471 names_h = objArrayHandle(THREAD, r);
4472 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4473 names_h->obj_at_put(0, name());
4474 break;
4475 }
4476 case JAVA_THREAD_STATE_BLOCKED : {
4477 assert(values_h->length() == 1 &&
4478 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4479 "Invalid threadStatus value");
4480
4481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4482 1, /* only 1 substate */
4483 CHECK_NULL);
4484 names_h = objArrayHandle(THREAD, r);
4485 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4486 names_h->obj_at_put(0, name());
4487 break;
4488 }
4489 case JAVA_THREAD_STATE_WAITING : {
4490 assert(values_h->length() == 2 &&
4491 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4492 values_h->int_at(1) == java_lang_Thread::PARKED,
4493 "Invalid threadStatus value");
4494 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4495 2, /* number of substates */
4496 CHECK_NULL);
4497 names_h = objArrayHandle(THREAD, r);
4498 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4499 CHECK_NULL);
4500 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4501 CHECK_NULL);
4502 names_h->obj_at_put(0, name0());
4503 names_h->obj_at_put(1, name1());
4504 break;
4505 }
4506 case JAVA_THREAD_STATE_TIMED_WAITING : {
4507 assert(values_h->length() == 3 &&
4508 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4509 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4510 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4511 "Invalid threadStatus value");
4512 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4513 3, /* number of substates */
4514 CHECK_NULL);
4515 names_h = objArrayHandle(THREAD, r);
4516 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4517 CHECK_NULL);
4518 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4519 CHECK_NULL);
4520 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4521 CHECK_NULL);
4522 names_h->obj_at_put(0, name0());
4523 names_h->obj_at_put(1, name1());
4524 names_h->obj_at_put(2, name2());
4525 break;
4526 }
4527 case JAVA_THREAD_STATE_TERMINATED : {
4528 assert(values_h->length() == 1 &&
4529 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4530 "Invalid threadStatus value");
4531 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4532 1, /* only 1 substate */
4533 CHECK_NULL);
4534 names_h = objArrayHandle(THREAD, r);
4535 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4536 names_h->obj_at_put(0, name());
4537 break;
4538 }
4539 default:
4540 // Unknown state - probably incompatible JDK version
4541 return NULL;
4542 }
4543 return (jobjectArray) JNIHandles::make_local(env, names_h());
4544 }
4545 JVM_END
4546
4547 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4548 {
4549 memset(info, 0, info_size);
4550
4551 info->jvm_version = Abstract_VM_Version::jvm_version();
4552 info->update_version = 0; /* 0 in HotSpot Express VM */
4553 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4554
4555 // when we add a new capability in the jvm_version_info struct, we should also
4556 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4557 // counter defined in runtimeService.cpp.
4558 info->is_attachable = AttachListener::is_attach_supported();
4559 }
4560 JVM_END