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