1 /*
2 * Copyright (c) 1997, 2018, 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/classLoaderData.inline.hpp"
28 #include "classfile/classLoaderExt.hpp"
29 #include "classfile/javaAssertions.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #if INCLUDE_CDS
34 #include "classfile/sharedClassUtil.hpp"
35 #include "classfile/systemDictionaryShared.hpp"
36 #endif
37 #include "classfile/vmSymbols.hpp"
38 #include "gc_interface/collectedHeap.inline.hpp"
39 #include "interpreter/bytecode.hpp"
40 #if INCLUDE_JFR
41 #include "jfr/jfrEvents.hpp"
42 #endif
43 #include "memory/oopFactory.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/fieldStreams.hpp"
47 #include "oops/instanceKlass.hpp"
48 #include "oops/objArrayKlass.hpp"
49 #include "oops/method.hpp"
50 #include "prims/jvm.h"
51 #include "prims/jvm_misc.hpp"
52 #include "prims/jvmtiExport.hpp"
53 #include "prims/jvmtiThreadState.hpp"
54 #include "prims/nativeLookup.hpp"
55 #include "prims/privilegedStack.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/dtraceJSDT.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/init.hpp"
60 #include "runtime/interfaceSupport.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/orderAccess.inline.hpp"
65 #include "runtime/os.hpp"
66 #include "runtime/perfData.hpp"
67 #include "runtime/reflection.hpp"
68 #include "runtime/vframe.hpp"
69 #include "runtime/vm_operations.hpp"
70 #include "services/attachListener.hpp"
71 #include "services/management.hpp"
72 #include "services/threadService.hpp"
73 #include "utilities/copy.hpp"
74 #include "utilities/defaultStream.hpp"
75 #include "utilities/dtrace.hpp"
76 #include "utilities/events.hpp"
77 #include "utilities/histogram.hpp"
78 #include "utilities/top.hpp"
79 #include "utilities/utf8.hpp"
80 #ifdef TARGET_OS_FAMILY_linux
81 # include "jvm_linux.h"
82 #endif
83 #ifdef TARGET_OS_FAMILY_solaris
84 # include "jvm_solaris.h"
85 #endif
86 #ifdef TARGET_OS_FAMILY_windows
87 # include "jvm_windows.h"
88 #endif
89 #ifdef TARGET_OS_FAMILY_aix
90 # include "jvm_aix.h"
91 #endif
92 #ifdef TARGET_OS_FAMILY_bsd
93 # include "jvm_bsd.h"
94 #endif
95
96 #if INCLUDE_ALL_GCS
97 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
98 #endif // INCLUDE_ALL_GCS
99
100 #include <errno.h>
101
102 #ifndef USDT2
103 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
104 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
105 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
106 #endif /* !USDT2 */
107
108 /*
109 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
110 such ctors and calls MUST NOT come between an oop declaration/init and its
111 usage because if objects are move this may cause various memory stomps, bus
112 errors and segfaults. Here is a cookbook for causing so called "naked oop
113 failures":
114
115 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
116 JVMWrapper("JVM_GetClassDeclaredFields");
117
118 // Object address to be held directly in mirror & not visible to GC
119 oop mirror = JNIHandles::resolve_non_null(ofClass);
120
121 // If this ctor can hit a safepoint, moving objects around, then
122 ComplexConstructor foo;
123
124 // Boom! mirror may point to JUNK instead of the intended object
125 (some dereference of mirror)
126
127 // Here's another call that may block for GC, making mirror stale
128 MutexLocker ml(some_lock);
129
130 // And here's an initializer that can result in a stale oop
131 // all in one step.
132 oop o = call_that_can_throw_exception(TRAPS);
133
134
135 The solution is to keep the oop declaration BELOW the ctor or function
136 call that might cause a GC, do another resolve to reassign the oop, or
137 consider use of a Handle instead of an oop so there is immunity from object
138 motion. But note that the "QUICK" entries below do not have a handlemark
139 and thus can only support use of handles passed in.
140 */
141
142 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
143 ResourceMark rm;
144 int line_number = -1;
145 const char * source_file = NULL;
146 const char * trace = "explicit";
147 InstanceKlass* caller = NULL;
148 JavaThread* jthread = JavaThread::current();
149 if (jthread->has_last_Java_frame()) {
150 vframeStream vfst(jthread);
151
152 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
153 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
154 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
155 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
156 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
157
158 Method* last_caller = NULL;
159
160 while (!vfst.at_end()) {
161 Method* m = vfst.method();
162 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
163 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
164 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
165 break;
166 }
167 last_caller = m;
168 vfst.next();
169 }
170 // if this is called from Class.forName0 and that is called from Class.forName,
171 // then print the caller of Class.forName. If this is Class.loadClass, then print
172 // that caller, otherwise keep quiet since this should be picked up elsewhere.
173 bool found_it = false;
174 if (!vfst.at_end() &&
175 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
176 vfst.method()->name() == vmSymbols::forName0_name()) {
177 vfst.next();
178 if (!vfst.at_end() &&
179 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
180 vfst.method()->name() == vmSymbols::forName_name()) {
181 vfst.next();
182 found_it = true;
183 }
184 } else if (last_caller != NULL &&
185 last_caller->method_holder()->name() ==
186 vmSymbols::java_lang_ClassLoader() &&
187 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
188 last_caller->name() == vmSymbols::loadClass_name())) {
189 found_it = true;
190 } else if (!vfst.at_end()) {
191 if (vfst.method()->is_native()) {
192 // JNI call
193 found_it = true;
194 }
195 }
196 if (found_it && !vfst.at_end()) {
197 // found the caller
198 caller = vfst.method()->method_holder();
199 line_number = vfst.method()->line_number_from_bci(vfst.bci());
200 if (line_number == -1) {
201 // show method name if it's a native method
202 trace = vfst.method()->name_and_sig_as_C_string();
203 }
204 Symbol* s = caller->source_file_name();
205 if (s != NULL) {
206 source_file = s->as_C_string();
207 }
208 }
209 }
210 if (caller != NULL) {
211 if (to_class != caller) {
212 const char * from = caller->external_name();
213 const char * to = to_class->external_name();
214 // print in a single call to reduce interleaving between threads
215 if (source_file != NULL) {
216 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
217 } else {
218 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
219 }
220 }
221 }
222 }
223
224 void trace_class_resolution(Klass* to_class) {
225 EXCEPTION_MARK;
226 trace_class_resolution_impl(to_class, THREAD);
227 if (HAS_PENDING_EXCEPTION) {
228 CLEAR_PENDING_EXCEPTION;
229 }
230 }
231
232 // Wrapper to trace JVM functions
233
234 #ifdef ASSERT
235 class JVMTraceWrapper : public StackObj {
236 public:
237 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
238 if (TraceJVMCalls) {
239 va_list ap;
240 va_start(ap, format);
241 tty->print("JVM ");
242 tty->vprint_cr(format, ap);
243 va_end(ap);
244 }
245 }
246 };
247
248 Histogram* JVMHistogram;
249 volatile jint JVMHistogram_lock = 0;
250
251 class JVMHistogramElement : public HistogramElement {
252 public:
253 JVMHistogramElement(const char* name);
254 };
255
256 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
257 _name = elementName;
258 uintx count = 0;
259
260 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
261 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
262 count +=1;
263 if ( (WarnOnStalledSpinLock > 0)
264 && (count % WarnOnStalledSpinLock == 0)) {
265 warning("JVMHistogram_lock seems to be stalled");
266 }
267 }
268 }
269
270 if(JVMHistogram == NULL)
271 JVMHistogram = new Histogram("JVM Call Counts",100);
272
273 JVMHistogram->add_element(this);
274 Atomic::dec(&JVMHistogram_lock);
275 }
276
277 #define JVMCountWrapper(arg) \
278 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
279 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
280
281 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
282 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
283 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
284 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
285 #else
286 #define JVMWrapper(arg1)
287 #define JVMWrapper2(arg1, arg2)
288 #define JVMWrapper3(arg1, arg2, arg3)
289 #define JVMWrapper4(arg1, arg2, arg3, arg4)
290 #endif
291
292
293 // Interface version /////////////////////////////////////////////////////////////////////
294
295
296 JVM_LEAF(jint, JVM_GetInterfaceVersion())
297 return JVM_INTERFACE_VERSION;
298 JVM_END
299
300
301 // java.lang.System //////////////////////////////////////////////////////////////////////
302
303
304 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
305 JVMWrapper("JVM_CurrentTimeMillis");
306 return os::javaTimeMillis();
307 JVM_END
308
309 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
310 JVMWrapper("JVM_NanoTime");
311 return os::javaTimeNanos();
312 JVM_END
313
314
315 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
316 jobject dst, jint dst_pos, jint length))
317 JVMWrapper("JVM_ArrayCopy");
318 // Check if we have null pointers
319 if (src == NULL || dst == NULL) {
320 THROW(vmSymbols::java_lang_NullPointerException());
321 }
322 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
323 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
324 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
325 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
326 // Do copy
327 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
328 JVM_END
329
330
331 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
332 JavaValue r(T_OBJECT);
333 // public synchronized Object put(Object key, Object value);
334 HandleMark hm(THREAD);
335 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
336 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
337 JavaCalls::call_virtual(&r,
338 props,
339 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
340 vmSymbols::put_name(),
341 vmSymbols::object_object_object_signature(),
342 key_str,
343 value_str,
344 THREAD);
345 }
346
347
348 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
349
350
351 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
352 JVMWrapper("JVM_InitProperties");
353 ResourceMark rm;
354
355 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
356
357 // System property list includes both user set via -D option and
358 // jvm system specific properties.
359 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
360 PUTPROP(props, p->key(), p->value());
361 }
362
363 // Convert the -XX:MaxDirectMemorySize= command line flag
364 // to the sun.nio.MaxDirectMemorySize property.
365 // Do this after setting user properties to prevent people
366 // from setting the value with a -D option, as requested.
367 {
368 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
369 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
370 } else {
371 char as_chars[256];
372 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
373 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
374 }
375 }
376
377 // JVM monitoring and management support
378 // Add the sun.management.compiler property for the compiler's name
379 {
380 #undef CSIZE
381 #if defined(_LP64) || defined(_WIN64)
382 #define CSIZE "64-Bit "
383 #else
384 #define CSIZE
385 #endif // 64bit
386
387 #ifdef TIERED
388 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
389 #else
390 #if defined(COMPILER1)
391 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
392 #elif defined(COMPILER2)
393 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
394 #else
395 const char* compiler_name = "";
396 #endif // compilers
397 #endif // TIERED
398
399 if (*compiler_name != '\0' &&
400 (Arguments::mode() != Arguments::_int)) {
401 PUTPROP(props, "sun.management.compiler", compiler_name);
402 }
403 }
404
405 const char* enableSharedLookupCache = "false";
406 #if INCLUDE_CDS
407 if (ClassLoaderExt::is_lookup_cache_enabled()) {
408 enableSharedLookupCache = "true";
409 }
410 #endif
411 PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache);
412
413 return properties;
414 JVM_END
415
416
417 /*
418 * Return the temporary directory that the VM uses for the attach
419 * and perf data files.
420 *
421 * It is important that this directory is well-known and the
422 * same for all VM instances. It cannot be affected by configuration
423 * variables such as java.io.tmpdir.
424 */
425 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
426 JVMWrapper("JVM_GetTemporaryDirectory");
427 HandleMark hm(THREAD);
428 const char* temp_dir = os::get_temp_directory();
429 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
430 return (jstring) JNIHandles::make_local(env, h());
431 JVM_END
432
433
434 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
435
436 extern volatile jint vm_created;
437
438 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
439 if (vm_created != 0 && (code == 0)) {
440 // The VM is about to exit. We call back into Java to check whether finalizers should be run
441 Universe::run_finalizers_on_exit();
442 }
443 before_exit(thread);
444 vm_exit(code);
445 JVM_END
446
447
448 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
449 JVMWrapper("JVM_BeforeHalt");
450 #if INCLUDE_JFR
451 EventShutdown event;
452 if (event.should_commit()) {
453 event.set_reason("Shutdown requested from Java");
454 event.commit();
455 }
456 #endif
457 JVM_END
458
459
460 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
461 before_exit(thread);
462 vm_exit(code);
463 JVM_END
464
465
466 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
467 register_on_exit_function(func);
468 JVM_END
469
470
471 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
472 JVMWrapper("JVM_GC");
473 if (!DisableExplicitGC) {
474 Universe::heap()->collect(GCCause::_java_lang_system_gc);
475 }
476 JVM_END
477
478
479 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
480 JVMWrapper("JVM_MaxObjectInspectionAge");
481 return Universe::heap()->millis_since_last_gc();
482 JVM_END
483
484
485 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
486 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
487 JVM_END
488
489
490 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
491 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
492 JVM_END
493
494 static inline jlong convert_size_t_to_jlong(size_t val) {
495 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
496 NOT_LP64 (return (jlong)val;)
497 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
498 }
499
500 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
501 JVMWrapper("JVM_TotalMemory");
502 size_t n = Universe::heap()->capacity();
503 return convert_size_t_to_jlong(n);
504 JVM_END
505
506
507 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
508 JVMWrapper("JVM_FreeMemory");
509 CollectedHeap* ch = Universe::heap();
510 size_t n;
511 {
512 MutexLocker x(Heap_lock);
513 n = ch->capacity() - ch->used();
514 }
515 return convert_size_t_to_jlong(n);
516 JVM_END
517
518
519 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
520 JVMWrapper("JVM_MaxMemory");
521 size_t n = Universe::heap()->max_capacity();
522 return convert_size_t_to_jlong(n);
523 JVM_END
524
525
526 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
527 JVMWrapper("JVM_ActiveProcessorCount");
528 return os::active_processor_count();
529 JVM_END
530
531
532
533 // java.lang.Throwable //////////////////////////////////////////////////////
534
535
536 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
537 JVMWrapper("JVM_FillInStackTrace");
538 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
539 java_lang_Throwable::fill_in_stack_trace(exception);
540 JVM_END
541
542
543 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
544 JVMWrapper("JVM_GetStackTraceDepth");
545 oop exception = JNIHandles::resolve(throwable);
546 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
547 JVM_END
548
549
550 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
551 JVMWrapper("JVM_GetStackTraceElement");
552 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
553 oop exception = JNIHandles::resolve(throwable);
554 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
555 return JNIHandles::make_local(env, element);
556 JVM_END
557
558
559 // java.lang.Object ///////////////////////////////////////////////
560
561
562 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
563 JVMWrapper("JVM_IHashCode");
564 // as implemented in the classic virtual machine; return 0 if object is NULL
565 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
566 JVM_END
567
568
569 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
570 JVMWrapper("JVM_MonitorWait");
571 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
572 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
573 if (JvmtiExport::should_post_monitor_wait()) {
574 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
575
576 // The current thread already owns the monitor and it has not yet
577 // been added to the wait queue so the current thread cannot be
578 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
579 // event handler cannot accidentally consume an unpark() meant for
580 // the ParkEvent associated with this ObjectMonitor.
581 }
582 ObjectSynchronizer::wait(obj, ms, CHECK);
583 JVM_END
584
585
586 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
587 JVMWrapper("JVM_MonitorNotify");
588 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
589 ObjectSynchronizer::notify(obj, CHECK);
590 JVM_END
591
592
593 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
594 JVMWrapper("JVM_MonitorNotifyAll");
595 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
596 ObjectSynchronizer::notifyall(obj, CHECK);
597 JVM_END
598
599
600 static void fixup_cloned_reference(ReferenceType ref_type, oop src, oop clone) {
601 // If G1 is enabled then we need to register a non-null referent
602 // with the SATB barrier.
603 #if INCLUDE_ALL_GCS
604 if (UseG1GC) {
605 oop referent = java_lang_ref_Reference::referent(clone);
606 if (referent != NULL) {
607 G1SATBCardTableModRefBS::enqueue(referent);
608 }
609 }
610 #endif // INCLUDE_ALL_GCS
611 if ((java_lang_ref_Reference::next(clone) != NULL) ||
612 (java_lang_ref_Reference::queue(clone) == java_lang_ref_ReferenceQueue::ENQUEUED_queue())) {
613 // If the source has been enqueued or is being enqueued, don't
614 // register the clone with a queue.
615 java_lang_ref_Reference::set_queue(clone, java_lang_ref_ReferenceQueue::NULL_queue());
616 }
617 // discovered and next are list links; the clone is not in those lists.
618 java_lang_ref_Reference::set_discovered(clone, NULL);
619 java_lang_ref_Reference::set_next(clone, NULL);
620 }
621
622 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
623 JVMWrapper("JVM_Clone");
624 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
625 const KlassHandle klass (THREAD, obj->klass());
626 JvmtiVMObjectAllocEventCollector oam;
627
628 #ifdef ASSERT
629 // Just checking that the cloneable flag is set correct
630 if (obj->is_array()) {
631 guarantee(klass->is_cloneable(), "all arrays are cloneable");
632 } else {
633 guarantee(obj->is_instance(), "should be instanceOop");
634 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
635 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
636 }
637 #endif
638
639 // Check if class of obj supports the Cloneable interface.
640 // All arrays are considered to be cloneable (See JLS 20.1.5)
641 if (!klass->is_cloneable()) {
642 ResourceMark rm(THREAD);
643 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
644 }
645
646 // Make shallow object copy
647 ReferenceType ref_type = REF_NONE;
648 const int size = obj->size();
649 oop new_obj_oop = NULL;
650 if (obj->is_array()) {
651 const int length = ((arrayOop)obj())->length();
652 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
653 } else {
654 ref_type = InstanceKlass::cast(klass())->reference_type();
655 assert((ref_type == REF_NONE) ==
656 !klass->is_subclass_of(SystemDictionary::Reference_klass()),
657 "invariant");
658 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
659 }
660
661 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
662 // is modifying a reference field in the clonee, a non-oop-atomic copy might
663 // be suspended in the middle of copying the pointer and end up with parts
664 // of two different pointers in the field. Subsequent dereferences will crash.
665 // 4846409: an oop-copy of objects with long or double fields or arrays of same
666 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
667 // of oops. We know objects are aligned on a minimum of an jlong boundary.
668 // The same is true of StubRoutines::object_copy and the various oop_copy
669 // variants, and of the code generated by the inline_native_clone intrinsic.
670 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
671 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
672 (size_t)align_object_size(size) / HeapWordsPerLong);
673 // Clear the header
674 new_obj_oop->init_mark();
675
676 // Store check (mark entire object and let gc sort it out)
677 BarrierSet* bs = Universe::heap()->barrier_set();
678 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
679 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
680
681 // If cloning a Reference, set Reference fields to a safe state.
682 // Fixup must be completed before any safepoint.
683 if (ref_type != REF_NONE) {
684 fixup_cloned_reference(ref_type, obj(), new_obj_oop);
685 }
686
687 Handle new_obj(THREAD, new_obj_oop);
688 // Special handling for MemberNames. Since they contain Method* metadata, they
689 // must be registered so that RedefineClasses can fix metadata contained in them.
690 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
691 java_lang_invoke_MemberName::is_method(new_obj())) {
692 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
693 // MemberName may be unresolved, so doesn't need registration until resolved.
694 if (method != NULL) {
695 methodHandle m(THREAD, method);
696 // This can safepoint and redefine method, so need both new_obj and method
697 // in a handle, for two different reasons. new_obj can move, method can be
698 // deleted if nothing is using it on the stack.
699 m->method_holder()->add_member_name(new_obj(), false);
700 }
701 }
702
703 // Caution: this involves a java upcall, so the clone should be
704 // "gc-robust" by this stage.
705 if (klass->has_finalizer()) {
706 assert(obj->is_instance(), "should be instanceOop");
707 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
708 new_obj = Handle(THREAD, new_obj_oop);
709 }
710
711 return JNIHandles::make_local(env, new_obj());
712 JVM_END
713
714 // java.lang.Compiler ////////////////////////////////////////////////////
715
716 // The initial cuts of the HotSpot VM will not support JITs, and all existing
717 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
718 // functions are all silently ignored unless JVM warnings are printed.
719
720 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
721 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
722 JVM_END
723
724
725 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
726 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
727 return JNI_FALSE;
728 JVM_END
729
730
731 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
732 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
733 return JNI_FALSE;
734 JVM_END
735
736
737 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
738 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
739 return JNI_FALSE;
740 JVM_END
741
742
743 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
744 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
745 return NULL;
746 JVM_END
747
748
749 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
750 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
751 JVM_END
752
753
754 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
755 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
756 JVM_END
757
758
759
760 // Error message support //////////////////////////////////////////////////////
761
762 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
763 JVMWrapper("JVM_GetLastErrorString");
764 return (jint)os::lasterror(buf, len);
765 JVM_END
766
767
768 // java.io.File ///////////////////////////////////////////////////////////////
769
770 JVM_LEAF(char*, JVM_NativePath(char* path))
771 JVMWrapper2("JVM_NativePath (%s)", path);
772 return os::native_path(path);
773 JVM_END
774
775
776 // java.nio.Bits ///////////////////////////////////////////////////////////////
777
778 #define MAX_OBJECT_SIZE \
779 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \
780 + ((julong)max_jint * sizeof(double)) )
781
782 static inline jlong field_offset_to_byte_offset(jlong field_offset) {
783 return field_offset;
784 }
785
786 static inline void assert_field_offset_sane(oop p, jlong field_offset) {
787 #ifdef ASSERT
788 jlong byte_offset = field_offset_to_byte_offset(field_offset);
789
790 if (p != NULL) {
791 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset");
792 if (byte_offset == (jint)byte_offset) {
793 void* ptr_plus_disp = (address)p + byte_offset;
794 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp,
795 "raw [ptr+disp] must be consistent with oop::field_base");
796 }
797 jlong p_size = HeapWordSize * (jlong)(p->size());
798 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT
799 " > object's size " INT64_FORMAT,
800 (int64_t)byte_offset, (int64_t)p_size));
801 }
802 #endif
803 }
804
805 static inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
806 assert_field_offset_sane(p, field_offset);
807 jlong byte_offset = field_offset_to_byte_offset(field_offset);
808
809 if (sizeof(char*) == sizeof(jint)) { // (this constant folds!)
810 return (address)p + (jint) byte_offset;
811 } else {
812 return (address)p + byte_offset;
813 }
814 }
815
816 // This function is a leaf since if the source and destination are both in native memory
817 // the copy may potentially be very large, and we don't want to disable GC if we can avoid it.
818 // If either source or destination (or both) are on the heap, the function will enter VM using
819 // JVM_ENTRY_FROM_LEAF
820 JVM_LEAF(void, JVM_CopySwapMemory(JNIEnv *env, jobject srcObj, jlong srcOffset,
821 jobject dstObj, jlong dstOffset, jlong size,
822 jlong elemSize)) {
823
824 size_t sz = (size_t)size;
825 size_t esz = (size_t)elemSize;
826
827 if (srcObj == NULL && dstObj == NULL) {
828 // Both src & dst are in native memory
829 address src = (address)srcOffset;
830 address dst = (address)dstOffset;
831
832 Copy::conjoint_swap(src, dst, sz, esz);
833 } else {
834 // At least one of src/dst are on heap, transition to VM to access raw pointers
835
836 JVM_ENTRY_FROM_LEAF(env, void, JVM_CopySwapMemory) {
837 oop srcp = JNIHandles::resolve(srcObj);
838 oop dstp = JNIHandles::resolve(dstObj);
839
840 address src = (address)index_oop_from_field_offset_long(srcp, srcOffset);
841 address dst = (address)index_oop_from_field_offset_long(dstp, dstOffset);
842
843 Copy::conjoint_swap(src, dst, sz, esz);
844 } JVM_END
845 }
846 } JVM_END
847
848
849 // Misc. class handling ///////////////////////////////////////////////////////////
850
851
852 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
853 JVMWrapper("JVM_GetCallerClass");
854
855 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
856 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
857 // temporarily for existing code to use until a replacement API is defined.
858 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
859 Klass* k = thread->security_get_caller_class(depth);
860 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
861 }
862
863 // Getting the class of the caller frame.
864 //
865 // The call stack at this point looks something like this:
866 //
867 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
868 // [1] [ @CallerSensitive API.method ]
869 // [.] [ (skipped intermediate frames) ]
870 // [n] [ caller ]
871 vframeStream vfst(thread);
872 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
873 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
874 Method* m = vfst.method();
875 assert(m != NULL, "sanity");
876 switch (n) {
877 case 0:
878 // This must only be called from Reflection.getCallerClass
879 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
880 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
881 }
882 // fall-through
883 case 1:
884 // Frame 0 and 1 must be caller sensitive.
885 if (!m->caller_sensitive()) {
886 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
887 }
888 break;
889 default:
890 if (!m->is_ignored_by_security_stack_walk()) {
891 // We have reached the desired frame; return the holder class.
892 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
893 }
894 break;
895 }
896 }
897 return NULL;
898 JVM_END
899
900
901 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
902 JVMWrapper("JVM_FindPrimitiveClass");
903 oop mirror = NULL;
904 BasicType t = name2type(utf);
905 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
906 mirror = Universe::java_mirror(t);
907 }
908 if (mirror == NULL) {
909 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
910 } else {
911 return (jclass) JNIHandles::make_local(env, mirror);
912 }
913 JVM_END
914
915
916 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
917 JVMWrapper("JVM_ResolveClass");
918 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
919 JVM_END
920
921
922 JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname))
923 JVMWrapper("JVM_KnownToNotExist");
924 #if INCLUDE_CDS
925 return ClassLoaderExt::known_to_not_exist(env, loader, classname, CHECK_(false));
926 #else
927 return false;
928 #endif
929 JVM_END
930
931
932 JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader))
933 JVMWrapper("JVM_GetResourceLookupCacheURLs");
934 #if INCLUDE_CDS
935 return ClassLoaderExt::get_lookup_cache_urls(env, loader, CHECK_NULL);
936 #else
937 return NULL;
938 #endif
939 JVM_END
940
941
942 JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name))
943 JVMWrapper("JVM_GetResourceLookupCache");
944 #if INCLUDE_CDS
945 return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, CHECK_NULL);
946 #else
947 return NULL;
948 #endif
949 JVM_END
950
951
952 // Returns a class loaded by the bootstrap class loader; or null
953 // if not found. ClassNotFoundException is not thrown.
954 //
955 // Rationale behind JVM_FindClassFromBootLoader
956 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
957 // b> because of (a) java.dll has a direct dependecy on the unexported
958 // private symbol "_JVM_FindClassFromClassLoader@20".
959 // c> the launcher cannot use the private symbol as it dynamically opens
960 // the entry point, so if something changes, the launcher will fail
961 // unexpectedly at runtime, it is safest for the launcher to dlopen a
962 // stable exported interface.
963 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
964 // signature to change from _JVM_FindClassFromClassLoader@20 to
965 // JVM_FindClassFromClassLoader and will not be backward compatible
966 // with older JDKs.
967 // Thus a public/stable exported entry point is the right solution,
968 // public here means public in linker semantics, and is exported only
969 // to the JDK, and is not intended to be a public API.
970
971 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
972 const char* name))
973 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
974
975 // Java libraries should ensure that name is never null...
976 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
977 // It's impossible to create this class; the name cannot fit
978 // into the constant pool.
979 return NULL;
980 }
981
982 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
983 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
984 if (k == NULL) {
985 return NULL;
986 }
987
988 if (TraceClassResolution) {
989 trace_class_resolution(k);
990 }
991 return (jclass) JNIHandles::make_local(env, k->java_mirror());
992 JVM_END
993
994 // Not used; JVM_FindClassFromCaller replaces this.
995 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
996 jboolean init, jobject loader,
997 jboolean throwError))
998 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
999 throwError ? "error" : "exception");
1000 // Java libraries should ensure that name is never null...
1001 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1002 // It's impossible to create this class; the name cannot fit
1003 // into the constant pool.
1004 if (throwError) {
1005 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1006 } else {
1007 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
1008 }
1009 }
1010 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1011 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1012 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1013 Handle(), throwError, THREAD);
1014
1015 if (TraceClassResolution && result != NULL) {
1016 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
1017 }
1018 return result;
1019 JVM_END
1020
1021 // Find a class with this name in this loader, using the caller's protection domain.
1022 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
1023 jboolean init, jobject loader,
1024 jclass caller))
1025 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
1026 // Java libraries should ensure that name is never null...
1027 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1028 // It's impossible to create this class; the name cannot fit
1029 // into the constant pool.
1030 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
1031 }
1032
1033 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1034
1035 oop loader_oop = JNIHandles::resolve(loader);
1036 oop from_class = JNIHandles::resolve(caller);
1037 oop protection_domain = NULL;
1038 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
1039 // NPE. Put it in another way, the bootstrap class loader has all permission and
1040 // thus no checkPackageAccess equivalence in the VM class loader.
1041 // The caller is also passed as NULL by the java code if there is no security
1042 // manager to avoid the performance cost of getting the calling class.
1043 if (from_class != NULL && loader_oop != NULL) {
1044 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
1045 }
1046
1047 Handle h_loader(THREAD, loader_oop);
1048 Handle h_prot(THREAD, protection_domain);
1049 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1050 h_prot, false, THREAD);
1051
1052 if (TraceClassResolution && result != NULL) {
1053 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
1054 }
1055 return result;
1056 JVM_END
1057
1058 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
1059 jboolean init, jclass from))
1060 JVMWrapper2("JVM_FindClassFromClass %s", name);
1061 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1062 // It's impossible to create this class; the name cannot fit
1063 // into the constant pool.
1064 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1065 }
1066 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1067 oop from_class_oop = JNIHandles::resolve(from);
1068 Klass* from_class = (from_class_oop == NULL)
1069 ? (Klass*)NULL
1070 : java_lang_Class::as_Klass(from_class_oop);
1071 oop class_loader = NULL;
1072 oop protection_domain = NULL;
1073 if (from_class != NULL) {
1074 class_loader = from_class->class_loader();
1075 protection_domain = from_class->protection_domain();
1076 }
1077 Handle h_loader(THREAD, class_loader);
1078 Handle h_prot (THREAD, protection_domain);
1079 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1080 h_prot, true, thread);
1081
1082 if (TraceClassResolution && result != NULL) {
1083 // this function is generally only used for class loading during verification.
1084 ResourceMark rm;
1085 oop from_mirror = JNIHandles::resolve_non_null(from);
1086 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
1087 const char * from_name = from_class->external_name();
1088
1089 oop mirror = JNIHandles::resolve_non_null(result);
1090 Klass* to_class = java_lang_Class::as_Klass(mirror);
1091 const char * to = to_class->external_name();
1092 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
1093 }
1094
1095 return result;
1096 JVM_END
1097
1098 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
1099 if (loader.is_null()) {
1100 return;
1101 }
1102
1103 // check whether the current caller thread holds the lock or not.
1104 // If not, increment the corresponding counter
1105 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
1106 ObjectSynchronizer::owner_self) {
1107 counter->inc();
1108 }
1109 }
1110
1111 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
1112 // and JVM_DefineClassWithSourceCond()
1113 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
1114 jobject loader, const jbyte *buf,
1115 jsize len, jobject pd, const char *source,
1116 jboolean verify, TRAPS) {
1117 if (source == NULL) source = "__JVM_DefineClass__";
1118
1119 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1120 JavaThread* jt = (JavaThread*) THREAD;
1121
1122 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
1123 ClassLoader::perf_define_appclass_selftime(),
1124 ClassLoader::perf_define_appclasses(),
1125 jt->get_thread_stat()->perf_recursion_counts_addr(),
1126 jt->get_thread_stat()->perf_timers_addr(),
1127 PerfClassTraceTime::DEFINE_CLASS);
1128
1129 if (UsePerfData) {
1130 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
1131 }
1132
1133 // Since exceptions can be thrown, class initialization can take place
1134 // if name is NULL no check for class name in .class stream has to be made.
1135 TempNewSymbol class_name = NULL;
1136 if (name != NULL) {
1137 const int str_len = (int)strlen(name);
1138 if (str_len > Symbol::max_length()) {
1139 // It's impossible to create this class; the name cannot fit
1140 // into the constant pool.
1141 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1142 }
1143 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
1144 }
1145
1146 ResourceMark rm(THREAD);
1147 ClassFileStream st((u1*) buf, len, (char *)source);
1148 Handle class_loader (THREAD, JNIHandles::resolve(loader));
1149 if (UsePerfData) {
1150 is_lock_held_by_thread(class_loader,
1151 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
1152 THREAD);
1153 }
1154 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1155 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
1156 protection_domain, &st,
1157 verify != 0,
1158 CHECK_NULL);
1159
1160 if (TraceClassResolution && k != NULL) {
1161 trace_class_resolution(k);
1162 }
1163
1164 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1165 }
1166
1167
1168 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1169 JVMWrapper2("JVM_DefineClass %s", name);
1170
1171 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1172 JVM_END
1173
1174
1175 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1176 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1177
1178 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1179 JVM_END
1180
1181 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1182 jobject loader, const jbyte *buf,
1183 jsize len, jobject pd,
1184 const char *source, jboolean verify))
1185 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1186
1187 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1188 JVM_END
1189
1190 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1191 JVMWrapper("JVM_FindLoadedClass");
1192 ResourceMark rm(THREAD);
1193
1194 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1195 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1196
1197 const char* str = java_lang_String::as_utf8_string(string());
1198 // Sanity check, don't expect null
1199 if (str == NULL) return NULL;
1200
1201 const int str_len = (int)strlen(str);
1202 if (str_len > Symbol::max_length()) {
1203 // It's impossible to create this class; the name cannot fit
1204 // into the constant pool.
1205 return NULL;
1206 }
1207 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1208
1209 // Security Note:
1210 // The Java level wrapper will perform the necessary security check allowing
1211 // us to pass the NULL as the initiating class loader.
1212 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1213 if (UsePerfData) {
1214 is_lock_held_by_thread(h_loader,
1215 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1216 THREAD);
1217 }
1218
1219 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1220 h_loader,
1221 Handle(),
1222 CHECK_NULL);
1223 #if INCLUDE_CDS
1224 if (k == NULL) {
1225 // If the class is not already loaded, try to see if it's in the shared
1226 // archive for the current classloader (h_loader).
1227 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1228 klass_name, h_loader, CHECK_NULL);
1229 k = ik();
1230 }
1231 #endif
1232 return (k == NULL) ? NULL :
1233 (jclass) JNIHandles::make_local(env, k->java_mirror());
1234 JVM_END
1235
1236
1237 // Reflection support //////////////////////////////////////////////////////////////////////////////
1238
1239 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1240 assert (cls != NULL, "illegal class");
1241 JVMWrapper("JVM_GetClassName");
1242 JvmtiVMObjectAllocEventCollector oam;
1243 ResourceMark rm(THREAD);
1244 const char* name;
1245 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1246 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1247 } else {
1248 // Consider caching interned string in Klass
1249 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1250 assert(k->is_klass(), "just checking");
1251 name = k->external_name();
1252 }
1253 oop result = StringTable::intern((char*) name, CHECK_NULL);
1254 return (jstring) JNIHandles::make_local(env, result);
1255 JVM_END
1256
1257
1258 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1259 JVMWrapper("JVM_GetClassInterfaces");
1260 JvmtiVMObjectAllocEventCollector oam;
1261 oop mirror = JNIHandles::resolve_non_null(cls);
1262
1263 // Special handling for primitive objects
1264 if (java_lang_Class::is_primitive(mirror)) {
1265 // Primitive objects does not have any interfaces
1266 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1267 return (jobjectArray) JNIHandles::make_local(env, r);
1268 }
1269
1270 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1271 // Figure size of result array
1272 int size;
1273 if (klass->oop_is_instance()) {
1274 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1275 } else {
1276 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1277 size = 2;
1278 }
1279
1280 // Allocate result array
1281 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1282 objArrayHandle result (THREAD, r);
1283 // Fill in result
1284 if (klass->oop_is_instance()) {
1285 // Regular instance klass, fill in all local interfaces
1286 for (int index = 0; index < size; index++) {
1287 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1288 result->obj_at_put(index, k->java_mirror());
1289 }
1290 } else {
1291 // All arrays implement java.lang.Cloneable and java.io.Serializable
1292 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1293 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1294 }
1295 return (jobjectArray) JNIHandles::make_local(env, result());
1296 JVM_END
1297
1298
1299 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1300 JVMWrapper("JVM_GetClassLoader");
1301 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1302 return NULL;
1303 }
1304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1305 oop loader = k->class_loader();
1306 return JNIHandles::make_local(env, loader);
1307 JVM_END
1308
1309
1310 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1311 JVMWrapper("JVM_IsInterface");
1312 oop mirror = JNIHandles::resolve_non_null(cls);
1313 if (java_lang_Class::is_primitive(mirror)) {
1314 return JNI_FALSE;
1315 }
1316 Klass* k = java_lang_Class::as_Klass(mirror);
1317 jboolean result = k->is_interface();
1318 assert(!result || k->oop_is_instance(),
1319 "all interfaces are instance types");
1320 // The compiler intrinsic for isInterface tests the
1321 // Klass::_access_flags bits in the same way.
1322 return result;
1323 JVM_END
1324
1325
1326 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1327 JVMWrapper("JVM_GetClassSigners");
1328 JvmtiVMObjectAllocEventCollector oam;
1329 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1330 // There are no signers for primitive types
1331 return NULL;
1332 }
1333
1334 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1335
1336 // If there are no signers set in the class, or if the class
1337 // is an array, return NULL.
1338 if (signers == NULL) return NULL;
1339
1340 // copy of the signers array
1341 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1342 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1343 for (int index = 0; index < signers->length(); index++) {
1344 signers_copy->obj_at_put(index, signers->obj_at(index));
1345 }
1346
1347 // return the copy
1348 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1349 JVM_END
1350
1351
1352 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1353 JVMWrapper("JVM_SetClassSigners");
1354 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1355 // This call is ignored for primitive types and arrays.
1356 // Signers are only set once, ClassLoader.java, and thus shouldn't
1357 // be called with an array. Only the bootstrap loader creates arrays.
1358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1359 if (k->oop_is_instance()) {
1360 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1361 }
1362 }
1363 JVM_END
1364
1365
1366 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1367 JVMWrapper("JVM_GetProtectionDomain");
1368 if (JNIHandles::resolve(cls) == NULL) {
1369 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1370 }
1371
1372 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1373 // Primitive types does not have a protection domain.
1374 return NULL;
1375 }
1376
1377 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1378 return (jobject) JNIHandles::make_local(env, pd);
1379 JVM_END
1380
1381
1382 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1383 // If there is a security manager and protection domain, check the access
1384 // in the protection domain, otherwise it is authorized.
1385 if (java_lang_System::has_security_manager()) {
1386
1387 // For bootstrapping, if pd implies method isn't in the JDK, allow
1388 // this context to revert to older behavior.
1389 // In this case the isAuthorized field in AccessControlContext is also not
1390 // present.
1391 if (Universe::protection_domain_implies_method() == NULL) {
1392 return true;
1393 }
1394
1395 // Whitelist certain access control contexts
1396 if (java_security_AccessControlContext::is_authorized(context)) {
1397 return true;
1398 }
1399
1400 oop prot = klass->protection_domain();
1401 if (prot != NULL) {
1402 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1403 // in the new wrapper.
1404 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1405 Handle h_prot(THREAD, prot);
1406 JavaValue result(T_BOOLEAN);
1407 JavaCallArguments args(h_prot);
1408 JavaCalls::call(&result, m, &args, CHECK_false);
1409 return (result.get_jboolean() != 0);
1410 }
1411 }
1412 return true;
1413 }
1414
1415 // Create an AccessControlContext with a protection domain with null codesource
1416 // and null permissions - which gives no permissions.
1417 oop create_dummy_access_control_context(TRAPS) {
1418 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1419 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1420 // Call constructor ProtectionDomain(null, null);
1421 JavaValue result(T_VOID);
1422 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1423 vmSymbols::object_initializer_name(),
1424 vmSymbols::codesource_permissioncollection_signature(),
1425 Handle(), Handle(), CHECK_NULL);
1426
1427 // new ProtectionDomain[] {pd};
1428 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1429 context->obj_at_put(0, obj());
1430
1431 // new AccessControlContext(new ProtectionDomain[] {pd})
1432 objArrayHandle h_context(THREAD, context);
1433 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1434 return acc;
1435 }
1436
1437 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1438 JVMWrapper("JVM_DoPrivileged");
1439
1440 if (action == NULL) {
1441 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1442 }
1443
1444 // Compute the frame initiating the do privileged operation and setup the privileged stack
1445 vframeStream vfst(thread);
1446 vfst.security_get_caller_frame(1);
1447
1448 if (vfst.at_end()) {
1449 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1450 }
1451
1452 Method* method = vfst.method();
1453 instanceKlassHandle klass (THREAD, method->method_holder());
1454
1455 // Check that action object understands "Object run()"
1456 Handle h_context;
1457 if (context != NULL) {
1458 h_context = Handle(THREAD, JNIHandles::resolve(context));
1459 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1460 if (!authorized) {
1461 // Create an unprivileged access control object and call it's run function
1462 // instead.
1463 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1464 h_context = Handle(THREAD, noprivs);
1465 }
1466 }
1467
1468 // Check that action object understands "Object run()"
1469 Handle object (THREAD, JNIHandles::resolve(action));
1470
1471 // get run() method
1472 Method* m_oop = object->klass()->uncached_lookup_method(
1473 vmSymbols::run_method_name(),
1474 vmSymbols::void_object_signature(),
1475 Klass::find_overpass);
1476 methodHandle m (THREAD, m_oop);
1477 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1478 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1479 }
1480
1481 // Stack allocated list of privileged stack elements
1482 PrivilegedElement pi;
1483 if (!vfst.at_end()) {
1484 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1485 thread->set_privileged_stack_top(&pi);
1486 }
1487
1488
1489 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1490 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1491 Handle pending_exception;
1492 JavaValue result(T_OBJECT);
1493 JavaCallArguments args(object);
1494 JavaCalls::call(&result, m, &args, THREAD);
1495
1496 // done with action, remove ourselves from the list
1497 if (!vfst.at_end()) {
1498 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1499 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1500 }
1501
1502 if (HAS_PENDING_EXCEPTION) {
1503 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1504 CLEAR_PENDING_EXCEPTION;
1505 // JVMTI has already reported the pending exception
1506 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1507 if (THREAD->is_Java_thread()) {
1508 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1509 }
1510 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1511 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1512 // Throw a java.security.PrivilegedActionException(Exception e) exception
1513 JavaCallArguments args(pending_exception);
1514 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1515 vmSymbols::exception_void_signature(),
1516 &args);
1517 }
1518 }
1519
1520 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1521 return JNIHandles::make_local(env, (oop) result.get_jobject());
1522 JVM_END
1523
1524
1525 // Returns the inherited_access_control_context field of the running thread.
1526 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1527 JVMWrapper("JVM_GetInheritedAccessControlContext");
1528 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1529 return JNIHandles::make_local(env, result);
1530 JVM_END
1531
1532 class RegisterArrayForGC {
1533 private:
1534 JavaThread *_thread;
1535 public:
1536 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1537 _thread = thread;
1538 _thread->register_array_for_gc(array);
1539 }
1540
1541 ~RegisterArrayForGC() {
1542 _thread->register_array_for_gc(NULL);
1543 }
1544 };
1545
1546
1547 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1548 JVMWrapper("JVM_GetStackAccessControlContext");
1549 if (!UsePrivilegedStack) return NULL;
1550
1551 ResourceMark rm(THREAD);
1552 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1553 JvmtiVMObjectAllocEventCollector oam;
1554
1555 // count the protection domains on the execution stack. We collapse
1556 // duplicate consecutive protection domains into a single one, as
1557 // well as stopping when we hit a privileged frame.
1558
1559 // Use vframeStream to iterate through Java frames
1560 vframeStream vfst(thread);
1561
1562 oop previous_protection_domain = NULL;
1563 Handle privileged_context(thread, NULL);
1564 bool is_privileged = false;
1565 oop protection_domain = NULL;
1566
1567 for(; !vfst.at_end(); vfst.next()) {
1568 // get method of frame
1569 Method* method = vfst.method();
1570 intptr_t* frame_id = vfst.frame_id();
1571
1572 // check the privileged frames to see if we have a match
1573 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1574 // this frame is privileged
1575 is_privileged = true;
1576 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1577 protection_domain = thread->privileged_stack_top()->protection_domain();
1578 } else {
1579 protection_domain = method->method_holder()->protection_domain();
1580 }
1581
1582 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1583 local_array->push(protection_domain);
1584 previous_protection_domain = protection_domain;
1585 }
1586
1587 if (is_privileged) break;
1588 }
1589
1590
1591 // either all the domains on the stack were system domains, or
1592 // we had a privileged system domain
1593 if (local_array->is_empty()) {
1594 if (is_privileged && privileged_context.is_null()) return NULL;
1595
1596 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1597 return JNIHandles::make_local(env, result);
1598 }
1599
1600 // the resource area must be registered in case of a gc
1601 RegisterArrayForGC ragc(thread, local_array);
1602 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1603 local_array->length(), CHECK_NULL);
1604 objArrayHandle h_context(thread, context);
1605 for (int index = 0; index < local_array->length(); index++) {
1606 h_context->obj_at_put(index, local_array->at(index));
1607 }
1608
1609 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1610
1611 return JNIHandles::make_local(env, result);
1612 JVM_END
1613
1614
1615 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1616 JVMWrapper("JVM_IsArrayClass");
1617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1618 return (k != NULL) && k->oop_is_array() ? true : false;
1619 JVM_END
1620
1621
1622 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1623 JVMWrapper("JVM_IsPrimitiveClass");
1624 oop mirror = JNIHandles::resolve_non_null(cls);
1625 return (jboolean) java_lang_Class::is_primitive(mirror);
1626 JVM_END
1627
1628
1629 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1630 JVMWrapper("JVM_GetComponentType");
1631 oop mirror = JNIHandles::resolve_non_null(cls);
1632 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1633 return (jclass) JNIHandles::make_local(env, result);
1634 JVM_END
1635
1636
1637 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1638 JVMWrapper("JVM_GetClassModifiers");
1639 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1640 // Primitive type
1641 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1642 }
1643
1644 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1645 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1646 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1647 return k->modifier_flags();
1648 JVM_END
1649
1650
1651 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1652
1653 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1654 JvmtiVMObjectAllocEventCollector oam;
1655 // ofClass is a reference to a java_lang_Class object. The mirror object
1656 // of an InstanceKlass
1657
1658 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1659 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1660 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1661 return (jobjectArray)JNIHandles::make_local(env, result);
1662 }
1663
1664 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1665 InnerClassesIterator iter(k);
1666
1667 if (iter.length() == 0) {
1668 // Neither an inner nor outer class
1669 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1670 return (jobjectArray)JNIHandles::make_local(env, result);
1671 }
1672
1673 // find inner class info
1674 constantPoolHandle cp(thread, k->constants());
1675 int length = iter.length();
1676
1677 // Allocate temp. result array
1678 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1679 objArrayHandle result (THREAD, r);
1680 int members = 0;
1681
1682 for (; !iter.done(); iter.next()) {
1683 int ioff = iter.inner_class_info_index();
1684 int ooff = iter.outer_class_info_index();
1685
1686 if (ioff != 0 && ooff != 0) {
1687 // Check to see if the name matches the class we're looking for
1688 // before attempting to find the class.
1689 if (cp->klass_name_at_matches(k, ooff)) {
1690 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1691 if (outer_klass == k()) {
1692 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1693 instanceKlassHandle inner_klass (THREAD, ik);
1694
1695 // Throws an exception if outer klass has not declared k as
1696 // an inner klass
1697 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1698
1699 result->obj_at_put(members, inner_klass->java_mirror());
1700 members++;
1701 }
1702 }
1703 }
1704 }
1705
1706 if (members != length) {
1707 // Return array of right length
1708 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1709 for(int i = 0; i < members; i++) {
1710 res->obj_at_put(i, result->obj_at(i));
1711 }
1712 return (jobjectArray)JNIHandles::make_local(env, res);
1713 }
1714
1715 return (jobjectArray)JNIHandles::make_local(env, result());
1716 JVM_END
1717
1718
1719 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1720 {
1721 // ofClass is a reference to a java_lang_Class object.
1722 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1723 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1724 return NULL;
1725 }
1726
1727 bool inner_is_member = false;
1728 Klass* outer_klass
1729 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1730 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1731 if (outer_klass == NULL) return NULL; // already a top-level class
1732 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1733 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1734 }
1735 JVM_END
1736
1737 // should be in InstanceKlass.cpp, but is here for historical reasons
1738 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1739 bool* inner_is_member,
1740 TRAPS) {
1741 Thread* thread = THREAD;
1742 InnerClassesIterator iter(k);
1743 if (iter.length() == 0) {
1744 // No inner class info => no declaring class
1745 return NULL;
1746 }
1747
1748 constantPoolHandle i_cp(thread, k->constants());
1749
1750 bool found = false;
1751 Klass* ok;
1752 instanceKlassHandle outer_klass;
1753 *inner_is_member = false;
1754
1755 // Find inner_klass attribute
1756 for (; !iter.done() && !found; iter.next()) {
1757 int ioff = iter.inner_class_info_index();
1758 int ooff = iter.outer_class_info_index();
1759 int noff = iter.inner_name_index();
1760 if (ioff != 0) {
1761 // Check to see if the name matches the class we're looking for
1762 // before attempting to find the class.
1763 if (i_cp->klass_name_at_matches(k, ioff)) {
1764 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1765 found = (k() == inner_klass);
1766 if (found && ooff != 0) {
1767 ok = i_cp->klass_at(ooff, CHECK_NULL);
1768 outer_klass = instanceKlassHandle(thread, ok);
1769 *inner_is_member = true;
1770 }
1771 }
1772 }
1773 }
1774
1775 if (found && outer_klass.is_null()) {
1776 // It may be anonymous; try for that.
1777 int encl_method_class_idx = k->enclosing_method_class_index();
1778 if (encl_method_class_idx != 0) {
1779 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1780 outer_klass = instanceKlassHandle(thread, ok);
1781 *inner_is_member = false;
1782 }
1783 }
1784
1785 // If no inner class attribute found for this class.
1786 if (outer_klass.is_null()) return NULL;
1787
1788 // Throws an exception if outer klass has not declared k as an inner klass
1789 // We need evidence that each klass knows about the other, or else
1790 // the system could allow a spoof of an inner class to gain access rights.
1791 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1792 return outer_klass();
1793 }
1794
1795 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1796 assert (cls != NULL, "illegal class");
1797 JVMWrapper("JVM_GetClassSignature");
1798 JvmtiVMObjectAllocEventCollector oam;
1799 ResourceMark rm(THREAD);
1800 // Return null for arrays and primatives
1801 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1802 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1803 if (k->oop_is_instance()) {
1804 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1805 if (sym == NULL) return NULL;
1806 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1807 return (jstring) JNIHandles::make_local(env, str());
1808 }
1809 }
1810 return NULL;
1811 JVM_END
1812
1813
1814 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1815 assert (cls != NULL, "illegal class");
1816 JVMWrapper("JVM_GetClassAnnotations");
1817
1818 // Return null for arrays and primitives
1819 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1820 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1821 if (k->oop_is_instance()) {
1822 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1823 return (jbyteArray) JNIHandles::make_local(env, a);
1824 }
1825 }
1826 return NULL;
1827 JVM_END
1828
1829
1830 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1831 // some of this code was adapted from from jni_FromReflectedField
1832
1833 oop reflected = JNIHandles::resolve_non_null(field);
1834 oop mirror = java_lang_reflect_Field::clazz(reflected);
1835 Klass* k = java_lang_Class::as_Klass(mirror);
1836 int slot = java_lang_reflect_Field::slot(reflected);
1837 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1838
1839 KlassHandle kh(THREAD, k);
1840 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1841
1842 if (modifiers & JVM_ACC_STATIC) {
1843 // for static fields we only look in the current class
1844 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1845 assert(false, "cannot find static field");
1846 return false;
1847 }
1848 } else {
1849 // for instance fields we start with the current class and work
1850 // our way up through the superclass chain
1851 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1852 assert(false, "cannot find instance field");
1853 return false;
1854 }
1855 }
1856 return true;
1857 }
1858
1859 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1860 // field is a handle to a java.lang.reflect.Field object
1861 assert(field != NULL, "illegal field");
1862 JVMWrapper("JVM_GetFieldAnnotations");
1863
1864 fieldDescriptor fd;
1865 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1866 if (!gotFd) {
1867 return NULL;
1868 }
1869
1870 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1871 JVM_END
1872
1873
1874 static Method* jvm_get_method_common(jobject method) {
1875 // some of this code was adapted from from jni_FromReflectedMethod
1876
1877 oop reflected = JNIHandles::resolve_non_null(method);
1878 oop mirror = NULL;
1879 int slot = 0;
1880
1881 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1882 mirror = java_lang_reflect_Constructor::clazz(reflected);
1883 slot = java_lang_reflect_Constructor::slot(reflected);
1884 } else {
1885 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1886 "wrong type");
1887 mirror = java_lang_reflect_Method::clazz(reflected);
1888 slot = java_lang_reflect_Method::slot(reflected);
1889 }
1890 Klass* k = java_lang_Class::as_Klass(mirror);
1891
1892 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1893 assert(m != NULL, "cannot find method");
1894 return m; // caller has to deal with NULL in product mode
1895 }
1896
1897
1898 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1899 JVMWrapper("JVM_GetMethodAnnotations");
1900
1901 // method is a handle to a java.lang.reflect.Method object
1902 Method* m = jvm_get_method_common(method);
1903 if (m == NULL) {
1904 return NULL;
1905 }
1906
1907 return (jbyteArray) JNIHandles::make_local(env,
1908 Annotations::make_java_array(m->annotations(), THREAD));
1909 JVM_END
1910
1911
1912 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1913 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1914
1915 // method is a handle to a java.lang.reflect.Method object
1916 Method* m = jvm_get_method_common(method);
1917 if (m == NULL) {
1918 return NULL;
1919 }
1920
1921 return (jbyteArray) JNIHandles::make_local(env,
1922 Annotations::make_java_array(m->annotation_default(), THREAD));
1923 JVM_END
1924
1925
1926 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1927 JVMWrapper("JVM_GetMethodParameterAnnotations");
1928
1929 // method is a handle to a java.lang.reflect.Method object
1930 Method* m = jvm_get_method_common(method);
1931 if (m == NULL) {
1932 return NULL;
1933 }
1934
1935 return (jbyteArray) JNIHandles::make_local(env,
1936 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1937 JVM_END
1938
1939 /* Type use annotations support (JDK 1.8) */
1940
1941 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1942 assert (cls != NULL, "illegal class");
1943 JVMWrapper("JVM_GetClassTypeAnnotations");
1944 ResourceMark rm(THREAD);
1945 // Return null for arrays and primitives
1946 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1947 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1948 if (k->oop_is_instance()) {
1949 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1950 if (type_annotations != NULL) {
1951 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1952 return (jbyteArray) JNIHandles::make_local(env, a);
1953 }
1954 }
1955 }
1956 return NULL;
1957 JVM_END
1958
1959 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1960 assert (method != NULL, "illegal method");
1961 JVMWrapper("JVM_GetMethodTypeAnnotations");
1962
1963 // method is a handle to a java.lang.reflect.Method object
1964 Method* m = jvm_get_method_common(method);
1965 if (m == NULL) {
1966 return NULL;
1967 }
1968
1969 AnnotationArray* type_annotations = m->type_annotations();
1970 if (type_annotations != NULL) {
1971 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1972 return (jbyteArray) JNIHandles::make_local(env, a);
1973 }
1974
1975 return NULL;
1976 JVM_END
1977
1978 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1979 assert (field != NULL, "illegal field");
1980 JVMWrapper("JVM_GetFieldTypeAnnotations");
1981
1982 fieldDescriptor fd;
1983 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1984 if (!gotFd) {
1985 return NULL;
1986 }
1987
1988 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1989 JVM_END
1990
1991 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1992 if (!cp->is_within_bounds(index)) {
1993 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1994 }
1995 }
1996
1997 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1998 {
1999 JVMWrapper("JVM_GetMethodParameters");
2000 // method is a handle to a java.lang.reflect.Method object
2001 Method* method_ptr = jvm_get_method_common(method);
2002 methodHandle mh (THREAD, method_ptr);
2003 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
2004 const int num_params = mh->method_parameters_length();
2005
2006 if (0 != num_params) {
2007 // make sure all the symbols are properly formatted
2008 for (int i = 0; i < num_params; i++) {
2009 MethodParametersElement* params = mh->method_parameters_start();
2010 int index = params[i].name_cp_index;
2011 bounds_check(mh->constants(), index, CHECK_NULL);
2012
2013 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
2015 "Wrong type at constant pool index");
2016 }
2017
2018 }
2019
2020 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
2021 objArrayHandle result (THREAD, result_oop);
2022
2023 for (int i = 0; i < num_params; i++) {
2024 MethodParametersElement* params = mh->method_parameters_start();
2025 // For a 0 index, give a NULL symbol
2026 Symbol* sym = 0 != params[i].name_cp_index ?
2027 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
2028 int flags = params[i].flags;
2029 oop param = Reflection::new_parameter(reflected_method, i, sym,
2030 flags, CHECK_NULL);
2031 result->obj_at_put(i, param);
2032 }
2033 return (jobjectArray)JNIHandles::make_local(env, result());
2034 } else {
2035 return (jobjectArray)NULL;
2036 }
2037 }
2038 JVM_END
2039
2040 // New (JDK 1.4) reflection implementation /////////////////////////////////////
2041
2042 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2043 {
2044 JVMWrapper("JVM_GetClassDeclaredFields");
2045 JvmtiVMObjectAllocEventCollector oam;
2046
2047 // Exclude primitive types and array types
2048 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
2049 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2050 // Return empty array
2051 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
2052 return (jobjectArray) JNIHandles::make_local(env, res);
2053 }
2054
2055 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2056 constantPoolHandle cp(THREAD, k->constants());
2057
2058 // Ensure class is linked
2059 k->link_class(CHECK_NULL);
2060
2061 // 4496456 We need to filter out java.lang.Throwable.backtrace
2062 bool skip_backtrace = false;
2063
2064 // Allocate result
2065 int num_fields;
2066
2067 if (publicOnly) {
2068 num_fields = 0;
2069 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
2070 if (fs.access_flags().is_public()) ++num_fields;
2071 }
2072 } else {
2073 num_fields = k->java_fields_count();
2074
2075 if (k() == SystemDictionary::Throwable_klass()) {
2076 num_fields--;
2077 skip_backtrace = true;
2078 }
2079 }
2080
2081 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
2082 objArrayHandle result (THREAD, r);
2083
2084 int out_idx = 0;
2085 fieldDescriptor fd;
2086 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
2087 if (skip_backtrace) {
2088 // 4496456 skip java.lang.Throwable.backtrace
2089 int offset = fs.offset();
2090 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
2091 }
2092
2093 if (!publicOnly || fs.access_flags().is_public()) {
2094 fd.reinitialize(k(), fs.index());
2095 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
2096 result->obj_at_put(out_idx, field);
2097 ++out_idx;
2098 }
2099 }
2100 assert(out_idx == num_fields, "just checking");
2101 return (jobjectArray) JNIHandles::make_local(env, result());
2102 }
2103 JVM_END
2104
2105 static bool select_method(methodHandle method, bool want_constructor) {
2106 if (want_constructor) {
2107 return (method->is_initializer() && !method->is_static());
2108 } else {
2109 return (!method->is_initializer() && !method->is_overpass());
2110 }
2111 }
2112
2113 static jobjectArray get_class_declared_methods_helper(
2114 JNIEnv *env,
2115 jclass ofClass, jboolean publicOnly,
2116 bool want_constructor,
2117 Klass* klass, TRAPS) {
2118
2119 JvmtiVMObjectAllocEventCollector oam;
2120
2121 // Exclude primitive types and array types
2122 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
2123 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2124 // Return empty array
2125 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
2126 return (jobjectArray) JNIHandles::make_local(env, res);
2127 }
2128
2129 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2130
2131 // Ensure class is linked
2132 k->link_class(CHECK_NULL);
2133
2134 Array<Method*>* methods = k->methods();
2135 int methods_length = methods->length();
2136
2137 // Save original method_idnum in case of redefinition, which can change
2138 // the idnum of obsolete methods. The new method will have the same idnum
2139 // but if we refresh the methods array, the counts will be wrong.
2140 ResourceMark rm(THREAD);
2141 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2142 int num_methods = 0;
2143
2144 for (int i = 0; i < methods_length; i++) {
2145 methodHandle method(THREAD, methods->at(i));
2146 if (select_method(method, want_constructor)) {
2147 if (!publicOnly || method->is_public()) {
2148 idnums->push(method->method_idnum());
2149 ++num_methods;
2150 }
2151 }
2152 }
2153
2154 // Allocate result
2155 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2156 objArrayHandle result (THREAD, r);
2157
2158 // Now just put the methods that we selected above, but go by their idnum
2159 // in case of redefinition. The methods can be redefined at any safepoint,
2160 // so above when allocating the oop array and below when creating reflect
2161 // objects.
2162 for (int i = 0; i < num_methods; i++) {
2163 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2164 if (method.is_null()) {
2165 // Method may have been deleted and seems this API can handle null
2166 // Otherwise should probably put a method that throws NSME
2167 result->obj_at_put(i, NULL);
2168 } else {
2169 oop m;
2170 if (want_constructor) {
2171 m = Reflection::new_constructor(method, CHECK_NULL);
2172 } else {
2173 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2174 }
2175 result->obj_at_put(i, m);
2176 }
2177 }
2178
2179 return (jobjectArray) JNIHandles::make_local(env, result());
2180 }
2181
2182 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2183 {
2184 JVMWrapper("JVM_GetClassDeclaredMethods");
2185 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2186 /*want_constructor*/ false,
2187 SystemDictionary::reflect_Method_klass(), THREAD);
2188 }
2189 JVM_END
2190
2191 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2192 {
2193 JVMWrapper("JVM_GetClassDeclaredConstructors");
2194 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2195 /*want_constructor*/ true,
2196 SystemDictionary::reflect_Constructor_klass(), THREAD);
2197 }
2198 JVM_END
2199
2200 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2201 {
2202 JVMWrapper("JVM_GetClassAccessFlags");
2203 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2204 // Primitive type
2205 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2206 }
2207
2208 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2209 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2210 }
2211 JVM_END
2212
2213
2214 // Constant pool access //////////////////////////////////////////////////////////
2215
2216 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2217 {
2218 JVMWrapper("JVM_GetClassConstantPool");
2219 JvmtiVMObjectAllocEventCollector oam;
2220
2221 // Return null for primitives and arrays
2222 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2223 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2224 if (k->oop_is_instance()) {
2225 instanceKlassHandle k_h(THREAD, k);
2226 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2227 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2228 return JNIHandles::make_local(jcp());
2229 }
2230 }
2231 return NULL;
2232 }
2233 JVM_END
2234
2235
2236 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2237 {
2238 JVMWrapper("JVM_ConstantPoolGetSize");
2239 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2240 return cp->length();
2241 }
2242 JVM_END
2243
2244
2245 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2246 {
2247 JVMWrapper("JVM_ConstantPoolGetClassAt");
2248 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2249 bounds_check(cp, index, CHECK_NULL);
2250 constantTag tag = cp->tag_at(index);
2251 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2252 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2253 }
2254 Klass* k = cp->klass_at(index, CHECK_NULL);
2255 return (jclass) JNIHandles::make_local(k->java_mirror());
2256 }
2257 JVM_END
2258
2259 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2260 {
2261 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2262 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2263 bounds_check(cp, index, CHECK_NULL);
2264 constantTag tag = cp->tag_at(index);
2265 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2266 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2267 }
2268 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2269 if (k == NULL) return NULL;
2270 return (jclass) JNIHandles::make_local(k->java_mirror());
2271 }
2272 JVM_END
2273
2274 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2275 constantTag tag = cp->tag_at(index);
2276 if (!tag.is_method() && !tag.is_interface_method()) {
2277 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2278 }
2279 int klass_ref = cp->uncached_klass_ref_index_at(index);
2280 Klass* k_o;
2281 if (force_resolution) {
2282 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2283 } else {
2284 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2285 if (k_o == NULL) return NULL;
2286 }
2287 instanceKlassHandle k(THREAD, k_o);
2288 Symbol* name = cp->uncached_name_ref_at(index);
2289 Symbol* sig = cp->uncached_signature_ref_at(index);
2290 methodHandle m (THREAD, k->find_method(name, sig));
2291 if (m.is_null()) {
2292 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2293 }
2294 oop method;
2295 if (!m->is_initializer() || m->is_static()) {
2296 method = Reflection::new_method(m, true, true, CHECK_NULL);
2297 } else {
2298 method = Reflection::new_constructor(m, CHECK_NULL);
2299 }
2300 return JNIHandles::make_local(method);
2301 }
2302
2303 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2304 {
2305 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2306 JvmtiVMObjectAllocEventCollector oam;
2307 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2308 bounds_check(cp, index, CHECK_NULL);
2309 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2310 return res;
2311 }
2312 JVM_END
2313
2314 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2315 {
2316 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2317 JvmtiVMObjectAllocEventCollector oam;
2318 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2319 bounds_check(cp, index, CHECK_NULL);
2320 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2321 return res;
2322 }
2323 JVM_END
2324
2325 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2326 constantTag tag = cp->tag_at(index);
2327 if (!tag.is_field()) {
2328 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2329 }
2330 int klass_ref = cp->uncached_klass_ref_index_at(index);
2331 Klass* k_o;
2332 if (force_resolution) {
2333 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2334 } else {
2335 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2336 if (k_o == NULL) return NULL;
2337 }
2338 instanceKlassHandle k(THREAD, k_o);
2339 Symbol* name = cp->uncached_name_ref_at(index);
2340 Symbol* sig = cp->uncached_signature_ref_at(index);
2341 fieldDescriptor fd;
2342 Klass* target_klass = k->find_field(name, sig, &fd);
2343 if (target_klass == NULL) {
2344 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2345 }
2346 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2347 return JNIHandles::make_local(field);
2348 }
2349
2350 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2351 {
2352 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2353 JvmtiVMObjectAllocEventCollector oam;
2354 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2355 bounds_check(cp, index, CHECK_NULL);
2356 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2357 return res;
2358 }
2359 JVM_END
2360
2361 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2362 {
2363 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2364 JvmtiVMObjectAllocEventCollector oam;
2365 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2366 bounds_check(cp, index, CHECK_NULL);
2367 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2368 return res;
2369 }
2370 JVM_END
2371
2372 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2373 {
2374 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2375 JvmtiVMObjectAllocEventCollector oam;
2376 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2377 bounds_check(cp, index, CHECK_NULL);
2378 constantTag tag = cp->tag_at(index);
2379 if (!tag.is_field_or_method()) {
2380 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2381 }
2382 int klass_ref = cp->uncached_klass_ref_index_at(index);
2383 Symbol* klass_name = cp->klass_name_at(klass_ref);
2384 Symbol* member_name = cp->uncached_name_ref_at(index);
2385 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2386 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2387 objArrayHandle dest(THREAD, dest_o);
2388 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2389 dest->obj_at_put(0, str());
2390 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2391 dest->obj_at_put(1, str());
2392 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2393 dest->obj_at_put(2, str());
2394 return (jobjectArray) JNIHandles::make_local(dest());
2395 }
2396 JVM_END
2397
2398 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2399 {
2400 JVMWrapper("JVM_ConstantPoolGetIntAt");
2401 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2402 bounds_check(cp, index, CHECK_0);
2403 constantTag tag = cp->tag_at(index);
2404 if (!tag.is_int()) {
2405 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2406 }
2407 return cp->int_at(index);
2408 }
2409 JVM_END
2410
2411 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2412 {
2413 JVMWrapper("JVM_ConstantPoolGetLongAt");
2414 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2415 bounds_check(cp, index, CHECK_(0L));
2416 constantTag tag = cp->tag_at(index);
2417 if (!tag.is_long()) {
2418 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2419 }
2420 return cp->long_at(index);
2421 }
2422 JVM_END
2423
2424 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2425 {
2426 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2427 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2428 bounds_check(cp, index, CHECK_(0.0f));
2429 constantTag tag = cp->tag_at(index);
2430 if (!tag.is_float()) {
2431 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2432 }
2433 return cp->float_at(index);
2434 }
2435 JVM_END
2436
2437 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2438 {
2439 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2440 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2441 bounds_check(cp, index, CHECK_(0.0));
2442 constantTag tag = cp->tag_at(index);
2443 if (!tag.is_double()) {
2444 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2445 }
2446 return cp->double_at(index);
2447 }
2448 JVM_END
2449
2450 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2451 {
2452 JVMWrapper("JVM_ConstantPoolGetStringAt");
2453 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2454 bounds_check(cp, index, CHECK_NULL);
2455 constantTag tag = cp->tag_at(index);
2456 if (!tag.is_string()) {
2457 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2458 }
2459 oop str = cp->string_at(index, CHECK_NULL);
2460 return (jstring) JNIHandles::make_local(str);
2461 }
2462 JVM_END
2463
2464 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2465 {
2466 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2467 JvmtiVMObjectAllocEventCollector oam;
2468 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2469 bounds_check(cp, index, CHECK_NULL);
2470 constantTag tag = cp->tag_at(index);
2471 if (!tag.is_symbol()) {
2472 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2473 }
2474 Symbol* sym = cp->symbol_at(index);
2475 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2476 return (jstring) JNIHandles::make_local(str());
2477 }
2478 JVM_END
2479
2480
2481 // Assertion support. //////////////////////////////////////////////////////////
2482
2483 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2484 JVMWrapper("JVM_DesiredAssertionStatus");
2485 assert(cls != NULL, "bad class");
2486
2487 oop r = JNIHandles::resolve(cls);
2488 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2489 if (java_lang_Class::is_primitive(r)) return false;
2490
2491 Klass* k = java_lang_Class::as_Klass(r);
2492 assert(k->oop_is_instance(), "must be an instance klass");
2493 if (! k->oop_is_instance()) return false;
2494
2495 ResourceMark rm(THREAD);
2496 const char* name = k->name()->as_C_string();
2497 bool system_class = k->class_loader() == NULL;
2498 return JavaAssertions::enabled(name, system_class);
2499
2500 JVM_END
2501
2502
2503 // Return a new AssertionStatusDirectives object with the fields filled in with
2504 // command-line assertion arguments (i.e., -ea, -da).
2505 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2506 JVMWrapper("JVM_AssertionStatusDirectives");
2507 JvmtiVMObjectAllocEventCollector oam;
2508 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2509 return JNIHandles::make_local(env, asd);
2510 JVM_END
2511
2512 // Verification ////////////////////////////////////////////////////////////////////////////////
2513
2514 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2515
2516 // RedefineClasses support: bug 6214132 caused verification to fail.
2517 // All functions from this section should call the jvmtiThreadSate function:
2518 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2519 // The function returns a Klass* of the _scratch_class if the verifier
2520 // was invoked in the middle of the class redefinition.
2521 // Otherwise it returns its argument value which is the _the_class Klass*.
2522 // Please, refer to the description in the jvmtiThreadSate.hpp.
2523
2524 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2525 JVMWrapper("JVM_GetClassNameUTF");
2526 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2528 return k->name()->as_utf8();
2529 JVM_END
2530
2531
2532 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2533 JVMWrapper("JVM_GetClassCPTypes");
2534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2535 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2536 // types will have length zero if this is not an InstanceKlass
2537 // (length is determined by call to JVM_GetClassCPEntriesCount)
2538 if (k->oop_is_instance()) {
2539 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2540 for (int index = cp->length() - 1; index >= 0; index--) {
2541 constantTag tag = cp->tag_at(index);
2542 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2543 }
2544 }
2545 JVM_END
2546
2547
2548 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2549 JVMWrapper("JVM_GetClassCPEntriesCount");
2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2552 if (!k->oop_is_instance())
2553 return 0;
2554 return InstanceKlass::cast(k)->constants()->length();
2555 JVM_END
2556
2557
2558 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2559 JVMWrapper("JVM_GetClassFieldsCount");
2560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2561 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2562 if (!k->oop_is_instance())
2563 return 0;
2564 return InstanceKlass::cast(k)->java_fields_count();
2565 JVM_END
2566
2567
2568 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2569 JVMWrapper("JVM_GetClassMethodsCount");
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 if (!k->oop_is_instance())
2573 return 0;
2574 return InstanceKlass::cast(k)->methods()->length();
2575 JVM_END
2576
2577
2578 // The following methods, used for the verifier, are never called with
2579 // array klasses, so a direct cast to InstanceKlass is safe.
2580 // Typically, these methods are called in a loop with bounds determined
2581 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2582 // zero for arrays.
2583 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2584 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2585 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2586 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2587 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2588 int length = method->checked_exceptions_length();
2589 if (length > 0) {
2590 CheckedExceptionElement* table= method->checked_exceptions_start();
2591 for (int i = 0; i < length; i++) {
2592 exceptions[i] = table[i].class_cp_index;
2593 }
2594 }
2595 JVM_END
2596
2597
2598 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2599 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2602 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2603 return method->checked_exceptions_length();
2604 JVM_END
2605
2606
2607 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2608 JVMWrapper("JVM_GetMethodIxByteCode");
2609 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2610 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2611 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2612 memcpy(code, method->code_base(), method->code_size());
2613 JVM_END
2614
2615
2616 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2617 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2621 return method->code_size();
2622 JVM_END
2623
2624
2625 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2626 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2627 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2628 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2629 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2630 ExceptionTable extable(method);
2631 entry->start_pc = extable.start_pc(entry_index);
2632 entry->end_pc = extable.end_pc(entry_index);
2633 entry->handler_pc = extable.handler_pc(entry_index);
2634 entry->catchType = extable.catch_type_index(entry_index);
2635 JVM_END
2636
2637
2638 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2639 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2640 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2641 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2642 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2643 return method->exception_table_length();
2644 JVM_END
2645
2646
2647 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2648 JVMWrapper("JVM_GetMethodIxModifiers");
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2652 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2653 JVM_END
2654
2655
2656 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2657 JVMWrapper("JVM_GetFieldIxModifiers");
2658 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2659 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2660 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2661 JVM_END
2662
2663
2664 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2665 JVMWrapper("JVM_GetMethodIxLocalsCount");
2666 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2667 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2668 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2669 return method->max_locals();
2670 JVM_END
2671
2672
2673 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2674 JVMWrapper("JVM_GetMethodIxArgsSize");
2675 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2676 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2677 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2678 return method->size_of_parameters();
2679 JVM_END
2680
2681
2682 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2683 JVMWrapper("JVM_GetMethodIxMaxStack");
2684 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2685 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2686 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2687 return method->verifier_max_stack();
2688 JVM_END
2689
2690
2691 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2692 JVMWrapper("JVM_IsConstructorIx");
2693 ResourceMark rm(THREAD);
2694 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2695 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2696 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2697 return method->name() == vmSymbols::object_initializer_name();
2698 JVM_END
2699
2700
2701 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2702 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2703 ResourceMark rm(THREAD);
2704 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2705 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2706 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2707 return method->is_overpass();
2708 JVM_END
2709
2710 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2711 JVMWrapper("JVM_GetMethodIxIxUTF");
2712 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2713 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2714 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2715 return method->name()->as_utf8();
2716 JVM_END
2717
2718
2719 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2720 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2721 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2722 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2723 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2724 return method->signature()->as_utf8();
2725 JVM_END
2726
2727 /**
2728 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2729 * read entries in the constant pool. Since the old verifier always
2730 * works on a copy of the code, it will not see any rewriting that
2731 * may possibly occur in the middle of verification. So it is important
2732 * that nothing it calls tries to use the cpCache instead of the raw
2733 * constant pool, so we must use cp->uncached_x methods when appropriate.
2734 */
2735 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2736 JVMWrapper("JVM_GetCPFieldNameUTF");
2737 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2738 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2739 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2740 switch (cp->tag_at(cp_index).value()) {
2741 case JVM_CONSTANT_Fieldref:
2742 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2743 default:
2744 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2745 }
2746 ShouldNotReachHere();
2747 return NULL;
2748 JVM_END
2749
2750
2751 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2752 JVMWrapper("JVM_GetCPMethodNameUTF");
2753 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2754 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2755 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2756 switch (cp->tag_at(cp_index).value()) {
2757 case JVM_CONSTANT_InterfaceMethodref:
2758 case JVM_CONSTANT_Methodref:
2759 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2760 default:
2761 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2762 }
2763 ShouldNotReachHere();
2764 return NULL;
2765 JVM_END
2766
2767
2768 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2769 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2770 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2771 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2772 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2773 switch (cp->tag_at(cp_index).value()) {
2774 case JVM_CONSTANT_InterfaceMethodref:
2775 case JVM_CONSTANT_Methodref:
2776 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2777 default:
2778 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2779 }
2780 ShouldNotReachHere();
2781 return NULL;
2782 JVM_END
2783
2784
2785 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2786 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2787 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2788 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2789 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2790 switch (cp->tag_at(cp_index).value()) {
2791 case JVM_CONSTANT_Fieldref:
2792 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2793 default:
2794 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2795 }
2796 ShouldNotReachHere();
2797 return NULL;
2798 JVM_END
2799
2800
2801 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2802 JVMWrapper("JVM_GetCPClassNameUTF");
2803 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2804 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2805 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2806 Symbol* classname = cp->klass_name_at(cp_index);
2807 return classname->as_utf8();
2808 JVM_END
2809
2810
2811 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2812 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2813 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2814 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2815 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2816 switch (cp->tag_at(cp_index).value()) {
2817 case JVM_CONSTANT_Fieldref: {
2818 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2819 Symbol* classname = cp->klass_name_at(class_index);
2820 return classname->as_utf8();
2821 }
2822 default:
2823 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2824 }
2825 ShouldNotReachHere();
2826 return NULL;
2827 JVM_END
2828
2829
2830 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2831 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2832 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2833 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2834 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2835 switch (cp->tag_at(cp_index).value()) {
2836 case JVM_CONSTANT_Methodref:
2837 case JVM_CONSTANT_InterfaceMethodref: {
2838 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2839 Symbol* classname = cp->klass_name_at(class_index);
2840 return classname->as_utf8();
2841 }
2842 default:
2843 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2844 }
2845 ShouldNotReachHere();
2846 return NULL;
2847 JVM_END
2848
2849
2850 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2851 JVMWrapper("JVM_GetCPFieldModifiers");
2852 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2853 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2854 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2855 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2856 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2857 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2858 switch (cp->tag_at(cp_index).value()) {
2859 case JVM_CONSTANT_Fieldref: {
2860 Symbol* name = cp->uncached_name_ref_at(cp_index);
2861 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2862 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2863 if (fs.name() == name && fs.signature() == signature) {
2864 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2865 }
2866 }
2867 return -1;
2868 }
2869 default:
2870 fatal("JVM_GetCPFieldModifiers: illegal constant");
2871 }
2872 ShouldNotReachHere();
2873 return 0;
2874 JVM_END
2875
2876
2877 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2878 JVMWrapper("JVM_GetCPMethodModifiers");
2879 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2880 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2881 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2882 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2883 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2884 switch (cp->tag_at(cp_index).value()) {
2885 case JVM_CONSTANT_Methodref:
2886 case JVM_CONSTANT_InterfaceMethodref: {
2887 Symbol* name = cp->uncached_name_ref_at(cp_index);
2888 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2889 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2890 int methods_count = methods->length();
2891 for (int i = 0; i < methods_count; i++) {
2892 Method* method = methods->at(i);
2893 if (method->name() == name && method->signature() == signature) {
2894 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2895 }
2896 }
2897 return -1;
2898 }
2899 default:
2900 fatal("JVM_GetCPMethodModifiers: illegal constant");
2901 }
2902 ShouldNotReachHere();
2903 return 0;
2904 JVM_END
2905
2906
2907 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2908
2909 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2910 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2911 JVM_END
2912
2913
2914 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2915 JVMWrapper("JVM_IsSameClassPackage");
2916 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2917 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2918 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2919 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2920 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2921 JVM_END
2922
2923
2924 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2925
2926 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2927 JVMWrapper2("JVM_Open (%s)", fname);
2928
2929 //%note jvm_r6
2930 int result = os::open(fname, flags, mode);
2931 if (result >= 0) {
2932 return result;
2933 } else {
2934 switch(errno) {
2935 case EEXIST:
2936 return JVM_EEXIST;
2937 default:
2938 return -1;
2939 }
2940 }
2941 JVM_END
2942
2943
2944 JVM_LEAF(jint, JVM_Close(jint fd))
2945 JVMWrapper2("JVM_Close (0x%x)", fd);
2946 //%note jvm_r6
2947 return os::close(fd);
2948 JVM_END
2949
2950
2951 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2952 JVMWrapper2("JVM_Read (0x%x)", fd);
2953
2954 //%note jvm_r6
2955 return (jint)os::restartable_read(fd, buf, nbytes);
2956 JVM_END
2957
2958
2959 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2960 JVMWrapper2("JVM_Write (0x%x)", fd);
2961
2962 //%note jvm_r6
2963 return (jint)os::write(fd, buf, nbytes);
2964 JVM_END
2965
2966
2967 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2968 JVMWrapper2("JVM_Available (0x%x)", fd);
2969 //%note jvm_r6
2970 return os::available(fd, pbytes);
2971 JVM_END
2972
2973
2974 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2975 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2976 //%note jvm_r6
2977 return os::lseek(fd, offset, whence);
2978 JVM_END
2979
2980
2981 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2982 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2983 return os::ftruncate(fd, length);
2984 JVM_END
2985
2986
2987 JVM_LEAF(jint, JVM_Sync(jint fd))
2988 JVMWrapper2("JVM_Sync (0x%x)", fd);
2989 //%note jvm_r6
2990 return os::fsync(fd);
2991 JVM_END
2992
2993
2994 // Printing support //////////////////////////////////////////////////
2995 extern "C" {
2996
2997 ATTRIBUTE_PRINTF(3, 0)
2998 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2999 // Reject count values that are negative signed values converted to
3000 // unsigned; see bug 4399518, 4417214
3001 if ((intptr_t)count <= 0) return -1;
3002
3003 int result = os::vsnprintf(str, count, fmt, args);
3004 if (result > 0 && (size_t)result >= count) {
3005 result = -1;
3006 }
3007
3008 return result;
3009 }
3010
3011 ATTRIBUTE_PRINTF(3, 0)
3012 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
3013 va_list args;
3014 int len;
3015 va_start(args, fmt);
3016 len = jio_vsnprintf(str, count, fmt, args);
3017 va_end(args);
3018 return len;
3019 }
3020
3021 ATTRIBUTE_PRINTF(2,3)
3022 int jio_fprintf(FILE* f, const char *fmt, ...) {
3023 int len;
3024 va_list args;
3025 va_start(args, fmt);
3026 len = jio_vfprintf(f, fmt, args);
3027 va_end(args);
3028 return len;
3029 }
3030
3031 ATTRIBUTE_PRINTF(2, 0)
3032 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
3033 if (Arguments::vfprintf_hook() != NULL) {
3034 return Arguments::vfprintf_hook()(f, fmt, args);
3035 } else {
3036 return vfprintf(f, fmt, args);
3037 }
3038 }
3039
3040 ATTRIBUTE_PRINTF(1, 2)
3041 JNIEXPORT int jio_printf(const char *fmt, ...) {
3042 int len;
3043 va_list args;
3044 va_start(args, fmt);
3045 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
3046 va_end(args);
3047 return len;
3048 }
3049
3050
3051 // HotSpot specific jio method
3052 void jio_print(const char* s) {
3053 // Try to make this function as atomic as possible.
3054 if (Arguments::vfprintf_hook() != NULL) {
3055 jio_fprintf(defaultStream::output_stream(), "%s", s);
3056 } else {
3057 // Make an unused local variable to avoid warning from gcc 4.x compiler.
3058 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
3059 }
3060 }
3061
3062 } // Extern C
3063
3064 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
3065
3066 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
3067 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
3068 // OSThread objects. The exception to this rule is when the target object is the thread
3069 // doing the operation, in which case we know that the thread won't exit until the
3070 // operation is done (all exits being voluntary). There are a few cases where it is
3071 // rather silly to do operations on yourself, like resuming yourself or asking whether
3072 // you are alive. While these can still happen, they are not subject to deadlocks if
3073 // the lock is held while the operation occurs (this is not the case for suspend, for
3074 // instance), and are very unlikely. Because IsAlive needs to be fast and its
3075 // implementation is local to this file, we always lock Threads_lock for that one.
3076
3077 static void thread_entry(JavaThread* thread, TRAPS) {
3078 HandleMark hm(THREAD);
3079 Handle obj(THREAD, thread->threadObj());
3080 JavaValue result(T_VOID);
3081 JavaCalls::call_virtual(&result,
3082 obj,
3083 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
3084 vmSymbols::run_method_name(),
3085 vmSymbols::void_method_signature(),
3086 THREAD);
3087 }
3088
3089
3090 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
3091 JVMWrapper("JVM_StartThread");
3092 JavaThread *native_thread = NULL;
3093
3094 // We cannot hold the Threads_lock when we throw an exception,
3095 // due to rank ordering issues. Example: we might need to grab the
3096 // Heap_lock while we construct the exception.
3097 bool throw_illegal_thread_state = false;
3098
3099 // We must release the Threads_lock before we can post a jvmti event
3100 // in Thread::start.
3101 {
3102 // Ensure that the C++ Thread and OSThread structures aren't freed before
3103 // we operate.
3104 MutexLocker mu(Threads_lock);
3105
3106 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
3107 // re-starting an already started thread, so we should usually find
3108 // that the JavaThread is null. However for a JNI attached thread
3109 // there is a small window between the Thread object being created
3110 // (with its JavaThread set) and the update to its threadStatus, so we
3111 // have to check for this
3112 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
3113 throw_illegal_thread_state = true;
3114 } else {
3115 // We could also check the stillborn flag to see if this thread was already stopped, but
3116 // for historical reasons we let the thread detect that itself when it starts running
3117
3118 jlong size =
3119 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
3120 // Allocate the C++ Thread structure and create the native thread. The
3121 // stack size retrieved from java is signed, but the constructor takes
3122 // size_t (an unsigned type), so avoid passing negative values which would
3123 // result in really large stacks.
3124 size_t sz = size > 0 ? (size_t) size : 0;
3125 native_thread = new JavaThread(&thread_entry, sz);
3126
3127 // At this point it may be possible that no osthread was created for the
3128 // JavaThread due to lack of memory. Check for this situation and throw
3129 // an exception if necessary. Eventually we may want to change this so
3130 // that we only grab the lock if the thread was created successfully -
3131 // then we can also do this check and throw the exception in the
3132 // JavaThread constructor.
3133 if (native_thread->osthread() != NULL) {
3134 // Note: the current thread is not being used within "prepare".
3135 native_thread->prepare(jthread);
3136 }
3137 }
3138 }
3139
3140 if (throw_illegal_thread_state) {
3141 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3142 }
3143
3144 assert(native_thread != NULL, "Starting null thread?");
3145
3146 if (native_thread->osthread() == NULL) {
3147 // No one should hold a reference to the 'native_thread'.
3148 delete native_thread;
3149 if (JvmtiExport::should_post_resource_exhausted()) {
3150 JvmtiExport::post_resource_exhausted(
3151 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3152 "unable to create new native thread");
3153 }
3154 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3155 "unable to create new native thread");
3156 }
3157
3158 Thread::start(native_thread);
3159
3160 JVM_END
3161
3162 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3163 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3164 // but is thought to be reliable and simple. In the case, where the receiver is the
3165 // same thread as the sender, no safepoint is needed.
3166 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3167 JVMWrapper("JVM_StopThread");
3168
3169 oop java_throwable = JNIHandles::resolve(throwable);
3170 if (java_throwable == NULL) {
3171 THROW(vmSymbols::java_lang_NullPointerException());
3172 }
3173 oop java_thread = JNIHandles::resolve_non_null(jthread);
3174 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3175 Events::log_exception(JavaThread::current(),
3176 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3177 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3178 // First check if thread is alive
3179 if (receiver != NULL) {
3180 // Check if exception is getting thrown at self (use oop equality, since the
3181 // target object might exit)
3182 if (java_thread == thread->threadObj()) {
3183 THROW_OOP(java_throwable);
3184 } else {
3185 // Enques a VM_Operation to stop all threads and then deliver the exception...
3186 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3187 }
3188 }
3189 else {
3190 // Either:
3191 // - target thread has not been started before being stopped, or
3192 // - target thread already terminated
3193 // We could read the threadStatus to determine which case it is
3194 // but that is overkill as it doesn't matter. We must set the
3195 // stillborn flag for the first case, and if the thread has already
3196 // exited setting this flag has no affect
3197 java_lang_Thread::set_stillborn(java_thread);
3198 }
3199 JVM_END
3200
3201
3202 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3203 JVMWrapper("JVM_IsThreadAlive");
3204
3205 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3206 return java_lang_Thread::is_alive(thread_oop);
3207 JVM_END
3208
3209
3210 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3211 JVMWrapper("JVM_SuspendThread");
3212 oop java_thread = JNIHandles::resolve_non_null(jthread);
3213 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3214
3215 if (receiver != NULL) {
3216 // thread has run and has not exited (still on threads list)
3217
3218 {
3219 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3220 if (receiver->is_external_suspend()) {
3221 // Don't allow nested external suspend requests. We can't return
3222 // an error from this interface so just ignore the problem.
3223 return;
3224 }
3225 if (receiver->is_exiting()) { // thread is in the process of exiting
3226 return;
3227 }
3228 receiver->set_external_suspend();
3229 }
3230
3231 // java_suspend() will catch threads in the process of exiting
3232 // and will ignore them.
3233 receiver->java_suspend();
3234
3235 // It would be nice to have the following assertion in all the
3236 // time, but it is possible for a racing resume request to have
3237 // resumed this thread right after we suspended it. Temporarily
3238 // enable this assertion if you are chasing a different kind of
3239 // bug.
3240 //
3241 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3242 // receiver->is_being_ext_suspended(), "thread is not suspended");
3243 }
3244 JVM_END
3245
3246
3247 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3248 JVMWrapper("JVM_ResumeThread");
3249 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3250 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3251 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3252 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3253 // looks at it.
3254 MutexLocker ml(Threads_lock);
3255 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3256 if (thr != NULL) {
3257 // the thread has run and is not in the process of exiting
3258 thr->java_resume();
3259 }
3260 JVM_END
3261
3262
3263 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3264 JVMWrapper("JVM_SetThreadPriority");
3265 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3266 MutexLocker ml(Threads_lock);
3267 oop java_thread = JNIHandles::resolve_non_null(jthread);
3268 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3269 JavaThread* thr = java_lang_Thread::thread(java_thread);
3270 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3271 Thread::set_priority(thr, (ThreadPriority)prio);
3272 }
3273 JVM_END
3274
3275
3276 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3277 JVMWrapper("JVM_Yield");
3278 if (os::dont_yield()) return;
3279 #ifndef USDT2
3280 HS_DTRACE_PROBE0(hotspot, thread__yield);
3281 #else /* USDT2 */
3282 HOTSPOT_THREAD_YIELD();
3283 #endif /* USDT2 */
3284 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3285 // Critical for similar threading behaviour
3286 if (ConvertYieldToSleep) {
3287 os::sleep(thread, MinSleepInterval, false);
3288 } else {
3289 os::yield();
3290 }
3291 JVM_END
3292
3293 #if INCLUDE_JFR
3294 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3295 assert(event != NULL, "invariant");
3296 assert(event->should_commit(), "invariant");
3297 event->set_time(millis);
3298 event->commit();
3299 }
3300 #endif
3301
3302 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3303 JVMWrapper("JVM_Sleep");
3304
3305 if (millis < 0) {
3306 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3307 }
3308
3309 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3310 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3311 }
3312
3313 // Save current thread state and restore it at the end of this block.
3314 // And set new thread state to SLEEPING.
3315 JavaThreadSleepState jtss(thread);
3316
3317 #ifndef USDT2
3318 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3319 #else /* USDT2 */
3320 HOTSPOT_THREAD_SLEEP_BEGIN(
3321 millis);
3322 #endif /* USDT2 */
3323
3324 #if INCLUDE_JFR
3325 EventThreadSleep event;
3326 #endif
3327
3328 if (millis == 0) {
3329 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3330 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3331 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3332 // for SOLARIS
3333 if (ConvertSleepToYield) {
3334 os::yield();
3335 } else {
3336 ThreadState old_state = thread->osthread()->get_state();
3337 thread->osthread()->set_state(SLEEPING);
3338 os::sleep(thread, MinSleepInterval, false);
3339 thread->osthread()->set_state(old_state);
3340 }
3341 } else {
3342 ThreadState old_state = thread->osthread()->get_state();
3343 thread->osthread()->set_state(SLEEPING);
3344 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3345 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3346 // us while we were sleeping. We do not overwrite those.
3347 if (!HAS_PENDING_EXCEPTION) {
3348 #if INCLUDE_JFR
3349 if (event.should_commit()) {
3350 post_thread_sleep_event(&event, millis);
3351 }
3352 #endif
3353 #ifndef USDT2
3354 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3355 #else /* USDT2 */
3356 HOTSPOT_THREAD_SLEEP_END(
3357 1);
3358 #endif /* USDT2 */
3359 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3360 // to properly restore the thread state. That's likely wrong.
3361 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3362 }
3363 }
3364 thread->osthread()->set_state(old_state);
3365 }
3366 #if INCLUDE_JFR
3367 if (event.should_commit()) {
3368 post_thread_sleep_event(&event, millis);
3369 }
3370 #endif
3371 #ifndef USDT2
3372 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3373 #else /* USDT2 */
3374 HOTSPOT_THREAD_SLEEP_END(
3375 0);
3376 #endif /* USDT2 */
3377 JVM_END
3378
3379 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3380 JVMWrapper("JVM_CurrentThread");
3381 oop jthread = thread->threadObj();
3382 assert (thread != NULL, "no current thread!");
3383 return JNIHandles::make_local(env, jthread);
3384 JVM_END
3385
3386
3387 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3388 JVMWrapper("JVM_CountStackFrames");
3389
3390 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3391 oop java_thread = JNIHandles::resolve_non_null(jthread);
3392 bool throw_illegal_thread_state = false;
3393 int count = 0;
3394
3395 {
3396 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3397 // We need to re-resolve the java_thread, since a GC might have happened during the
3398 // acquire of the lock
3399 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3400
3401 if (thr == NULL) {
3402 // do nothing
3403 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3404 // Check whether this java thread has been suspended already. If not, throws
3405 // IllegalThreadStateException. We defer to throw that exception until
3406 // Threads_lock is released since loading exception class has to leave VM.
3407 // The correct way to test a thread is actually suspended is
3408 // wait_for_ext_suspend_completion(), but we can't call that while holding
3409 // the Threads_lock. The above tests are sufficient for our purposes
3410 // provided the walkability of the stack is stable - which it isn't
3411 // 100% but close enough for most practical purposes.
3412 throw_illegal_thread_state = true;
3413 } else {
3414 // Count all java activation, i.e., number of vframes
3415 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3416 // Native frames are not counted
3417 if (!vfst.method()->is_native()) count++;
3418 }
3419 }
3420 }
3421
3422 if (throw_illegal_thread_state) {
3423 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3424 "this thread is not suspended");
3425 }
3426 return count;
3427 JVM_END
3428
3429 // Consider: A better way to implement JVM_Interrupt() is to acquire
3430 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3431 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3432 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3433 // outside the critical section. Threads_lock is hot so we want to minimize
3434 // the hold-time. A cleaner interface would be to decompose interrupt into
3435 // two steps. The 1st phase, performed under Threads_lock, would return
3436 // a closure that'd be invoked after Threads_lock was dropped.
3437 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3438 // admit spurious wakeups.
3439
3440 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3441 JVMWrapper("JVM_Interrupt");
3442
3443 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3444 oop java_thread = JNIHandles::resolve_non_null(jthread);
3445 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3446 // We need to re-resolve the java_thread, since a GC might have happened during the
3447 // acquire of the lock
3448 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3449 if (thr != NULL) {
3450 Thread::interrupt(thr);
3451 }
3452 JVM_END
3453
3454
3455 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3456 JVMWrapper("JVM_IsInterrupted");
3457
3458 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3459 oop java_thread = JNIHandles::resolve_non_null(jthread);
3460 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3461 // We need to re-resolve the java_thread, since a GC might have happened during the
3462 // acquire of the lock
3463 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3464 if (thr == NULL) {
3465 return JNI_FALSE;
3466 } else {
3467 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3468 }
3469 JVM_END
3470
3471
3472 // Return true iff the current thread has locked the object passed in
3473
3474 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3475 JVMWrapper("JVM_HoldsLock");
3476 assert(THREAD->is_Java_thread(), "sanity check");
3477 if (obj == NULL) {
3478 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3479 }
3480 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3481 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3482 JVM_END
3483
3484
3485 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3486 JVMWrapper("JVM_DumpAllStacks");
3487 VM_PrintThreads op;
3488 VMThread::execute(&op);
3489 if (JvmtiExport::should_post_data_dump()) {
3490 JvmtiExport::post_data_dump();
3491 }
3492 JVM_END
3493
3494 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3495 JVMWrapper("JVM_SetNativeThreadName");
3496 ResourceMark rm(THREAD);
3497 oop java_thread = JNIHandles::resolve_non_null(jthread);
3498 JavaThread* thr = java_lang_Thread::thread(java_thread);
3499 // Thread naming only supported for the current thread, doesn't work for
3500 // target threads.
3501 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3502 // we don't set the name of an attached thread to avoid stepping
3503 // on other programs
3504 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3505 os::set_native_thread_name(thread_name);
3506 }
3507 JVM_END
3508
3509 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3510
3511 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3512 assert(jthread->is_Java_thread(), "must be a Java thread");
3513 if (jthread->privileged_stack_top() == NULL) return false;
3514 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3515 oop loader = jthread->privileged_stack_top()->class_loader();
3516 if (loader == NULL) return true;
3517 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3518 if (trusted) return true;
3519 }
3520 return false;
3521 }
3522
3523 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3524 JVMWrapper("JVM_CurrentLoadedClass");
3525 ResourceMark rm(THREAD);
3526
3527 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3528 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3529 bool trusted = is_trusted_frame(thread, &vfst);
3530 if (trusted) return NULL;
3531
3532 Method* m = vfst.method();
3533 if (!m->is_native()) {
3534 InstanceKlass* holder = m->method_holder();
3535 oop loader = holder->class_loader();
3536 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3537 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3538 }
3539 }
3540 }
3541 return NULL;
3542 JVM_END
3543
3544
3545 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3546 JVMWrapper("JVM_CurrentClassLoader");
3547 ResourceMark rm(THREAD);
3548
3549 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3550
3551 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3552 bool trusted = is_trusted_frame(thread, &vfst);
3553 if (trusted) return NULL;
3554
3555 Method* m = vfst.method();
3556 if (!m->is_native()) {
3557 InstanceKlass* holder = m->method_holder();
3558 assert(holder->is_klass(), "just checking");
3559 oop loader = holder->class_loader();
3560 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3561 return JNIHandles::make_local(env, loader);
3562 }
3563 }
3564 }
3565 return NULL;
3566 JVM_END
3567
3568
3569 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3570 JVMWrapper("JVM_GetClassContext");
3571 ResourceMark rm(THREAD);
3572 JvmtiVMObjectAllocEventCollector oam;
3573 vframeStream vfst(thread);
3574
3575 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3576 // This must only be called from SecurityManager.getClassContext
3577 Method* m = vfst.method();
3578 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3579 m->name() == vmSymbols::getClassContext_name() &&
3580 m->signature() == vmSymbols::void_class_array_signature())) {
3581 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3582 }
3583 }
3584
3585 // Collect method holders
3586 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3587 for (; !vfst.at_end(); vfst.security_next()) {
3588 Method* m = vfst.method();
3589 // Native frames are not returned
3590 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3591 Klass* holder = m->method_holder();
3592 assert(holder->is_klass(), "just checking");
3593 klass_array->append(holder);
3594 }
3595 }
3596
3597 // Create result array of type [Ljava/lang/Class;
3598 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3599 // Fill in mirrors corresponding to method holders
3600 for (int i = 0; i < klass_array->length(); i++) {
3601 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3602 }
3603
3604 return (jobjectArray) JNIHandles::make_local(env, result);
3605 JVM_END
3606
3607
3608 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3609 JVMWrapper("JVM_ClassDepth");
3610 ResourceMark rm(THREAD);
3611 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3612 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3613
3614 const char* str = java_lang_String::as_utf8_string(class_name_str());
3615 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3616 if (class_name_sym == NULL) {
3617 return -1;
3618 }
3619
3620 int depth = 0;
3621
3622 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3623 if (!vfst.method()->is_native()) {
3624 InstanceKlass* holder = vfst.method()->method_holder();
3625 assert(holder->is_klass(), "just checking");
3626 if (holder->name() == class_name_sym) {
3627 return depth;
3628 }
3629 depth++;
3630 }
3631 }
3632 return -1;
3633 JVM_END
3634
3635
3636 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3637 JVMWrapper("JVM_ClassLoaderDepth");
3638 ResourceMark rm(THREAD);
3639 int depth = 0;
3640 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3641 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3642 bool trusted = is_trusted_frame(thread, &vfst);
3643 if (trusted) return -1;
3644
3645 Method* m = vfst.method();
3646 if (!m->is_native()) {
3647 InstanceKlass* holder = m->method_holder();
3648 assert(holder->is_klass(), "just checking");
3649 oop loader = holder->class_loader();
3650 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3651 return depth;
3652 }
3653 depth++;
3654 }
3655 }
3656 return -1;
3657 JVM_END
3658
3659
3660 // java.lang.Package ////////////////////////////////////////////////////////////////
3661
3662
3663 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3664 JVMWrapper("JVM_GetSystemPackage");
3665 ResourceMark rm(THREAD);
3666 JvmtiVMObjectAllocEventCollector oam;
3667 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3668 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3669 return (jstring) JNIHandles::make_local(result);
3670 JVM_END
3671
3672
3673 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3674 JVMWrapper("JVM_GetSystemPackages");
3675 JvmtiVMObjectAllocEventCollector oam;
3676 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3677 return (jobjectArray) JNIHandles::make_local(result);
3678 JVM_END
3679
3680
3681 // ObjectInputStream ///////////////////////////////////////////////////////////////
3682
3683 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3684 if (current_class == NULL) {
3685 return true;
3686 }
3687 if ((current_class == field_class) || access.is_public()) {
3688 return true;
3689 }
3690
3691 if (access.is_protected()) {
3692 // See if current_class is a subclass of field_class
3693 if (current_class->is_subclass_of(field_class)) {
3694 return true;
3695 }
3696 }
3697
3698 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3699 }
3700
3701
3702 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3703 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3704 JVMWrapper("JVM_AllocateNewObject");
3705 JvmtiVMObjectAllocEventCollector oam;
3706 // Receiver is not used
3707 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3708 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3709
3710 // Cannot instantiate primitive types
3711 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3712 ResourceMark rm(THREAD);
3713 THROW_0(vmSymbols::java_lang_InvalidClassException());
3714 }
3715
3716 // Arrays not allowed here, must use JVM_AllocateNewArray
3717 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3718 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3719 ResourceMark rm(THREAD);
3720 THROW_0(vmSymbols::java_lang_InvalidClassException());
3721 }
3722
3723 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3724 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3725
3726 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3727
3728 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3729 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3730
3731 // Make sure klass is initialized, since we are about to instantiate one of them.
3732 curr_klass->initialize(CHECK_NULL);
3733
3734 methodHandle m (THREAD,
3735 init_klass->find_method(vmSymbols::object_initializer_name(),
3736 vmSymbols::void_method_signature()));
3737 if (m.is_null()) {
3738 ResourceMark rm(THREAD);
3739 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3740 Method::name_and_sig_as_C_string(init_klass(),
3741 vmSymbols::object_initializer_name(),
3742 vmSymbols::void_method_signature()));
3743 }
3744
3745 if (curr_klass == init_klass && !m->is_public()) {
3746 // Calling the constructor for class 'curr_klass'.
3747 // Only allow calls to a public no-arg constructor.
3748 // This path corresponds to creating an Externalizable object.
3749 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3750 }
3751
3752 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3753 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3754 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3755 }
3756
3757 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3758 // Call constructor m. This might call a constructor higher up in the hierachy
3759 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3760
3761 return JNIHandles::make_local(obj());
3762 JVM_END
3763
3764
3765 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3766 JVMWrapper("JVM_AllocateNewArray");
3767 JvmtiVMObjectAllocEventCollector oam;
3768 oop mirror = JNIHandles::resolve_non_null(currClass);
3769
3770 if (java_lang_Class::is_primitive(mirror)) {
3771 THROW_0(vmSymbols::java_lang_InvalidClassException());
3772 }
3773 Klass* k = java_lang_Class::as_Klass(mirror);
3774 oop result;
3775
3776 if (k->oop_is_typeArray()) {
3777 // typeArray
3778 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3779 } else if (k->oop_is_objArray()) {
3780 // objArray
3781 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3782 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3783 result = oak->allocate(length, CHECK_NULL);
3784 } else {
3785 THROW_0(vmSymbols::java_lang_InvalidClassException());
3786 }
3787 return JNIHandles::make_local(env, result);
3788 JVM_END
3789
3790
3791 // Returns first non-privileged class loader on the stack (excluding reflection
3792 // generated frames) or null if only classes loaded by the boot class loader
3793 // and extension class loader are found on the stack.
3794
3795 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3796 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3797 // UseNewReflection
3798 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3799 oop loader = vfst.method()->method_holder()->class_loader();
3800 if (loader != NULL && !SystemDictionary::is_ext_class_loader(loader)) {
3801 return JNIHandles::make_local(env, loader);
3802 }
3803 }
3804 return NULL;
3805 JVM_END
3806
3807
3808 // Load a class relative to the most recent class on the stack with a non-null
3809 // classloader.
3810 // This function has been deprecated and should not be considered part of the
3811 // specified JVM interface.
3812
3813 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3814 jclass currClass, jstring currClassName))
3815 JVMWrapper("JVM_LoadClass0");
3816 // Receiver is not used
3817 ResourceMark rm(THREAD);
3818
3819 // Class name argument is not guaranteed to be in internal format
3820 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3821 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3822
3823 const char* str = java_lang_String::as_utf8_string(string());
3824
3825 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3826 // It's impossible to create this class; the name cannot fit
3827 // into the constant pool.
3828 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3829 }
3830
3831 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3832 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3833 // Find the most recent class on the stack with a non-null classloader
3834 oop loader = NULL;
3835 oop protection_domain = NULL;
3836 if (curr_klass.is_null()) {
3837 for (vframeStream vfst(thread);
3838 !vfst.at_end() && loader == NULL;
3839 vfst.next()) {
3840 if (!vfst.method()->is_native()) {
3841 InstanceKlass* holder = vfst.method()->method_holder();
3842 loader = holder->class_loader();
3843 protection_domain = holder->protection_domain();
3844 }
3845 }
3846 } else {
3847 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3848 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3849 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3850 }
3851 Handle h_loader(THREAD, loader);
3852 Handle h_prot (THREAD, protection_domain);
3853 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3854 false, thread);
3855 if (TraceClassResolution && result != NULL) {
3856 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3857 }
3858 return result;
3859 JVM_END
3860
3861
3862 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3863
3864
3865 // resolve array handle and check arguments
3866 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3867 if (arr == NULL) {
3868 THROW_0(vmSymbols::java_lang_NullPointerException());
3869 }
3870 oop a = JNIHandles::resolve_non_null(arr);
3871 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3872 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3873 }
3874 return arrayOop(a);
3875 }
3876
3877
3878 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3879 JVMWrapper("JVM_GetArrayLength");
3880 arrayOop a = check_array(env, arr, false, CHECK_0);
3881 return a->length();
3882 JVM_END
3883
3884
3885 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3886 JVMWrapper("JVM_Array_Get");
3887 JvmtiVMObjectAllocEventCollector oam;
3888 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3889 jvalue value;
3890 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3891 oop box = Reflection::box(&value, type, CHECK_NULL);
3892 return JNIHandles::make_local(env, box);
3893 JVM_END
3894
3895
3896 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3897 JVMWrapper("JVM_GetPrimitiveArrayElement");
3898 jvalue value;
3899 value.i = 0; // to initialize value before getting used in CHECK
3900 arrayOop a = check_array(env, arr, true, CHECK_(value));
3901 assert(a->is_typeArray(), "just checking");
3902 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3903 BasicType wide_type = (BasicType) wCode;
3904 if (type != wide_type) {
3905 Reflection::widen(&value, type, wide_type, CHECK_(value));
3906 }
3907 return value;
3908 JVM_END
3909
3910
3911 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3912 JVMWrapper("JVM_SetArrayElement");
3913 arrayOop a = check_array(env, arr, false, CHECK);
3914 oop box = JNIHandles::resolve(val);
3915 jvalue value;
3916 value.i = 0; // to initialize value before getting used in CHECK
3917 BasicType value_type;
3918 if (a->is_objArray()) {
3919 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3920 value_type = Reflection::unbox_for_regular_object(box, &value);
3921 } else {
3922 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3923 }
3924 Reflection::array_set(&value, a, index, value_type, CHECK);
3925 JVM_END
3926
3927
3928 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3929 JVMWrapper("JVM_SetPrimitiveArrayElement");
3930 arrayOop a = check_array(env, arr, true, CHECK);
3931 assert(a->is_typeArray(), "just checking");
3932 BasicType value_type = (BasicType) vCode;
3933 Reflection::array_set(&v, a, index, value_type, CHECK);
3934 JVM_END
3935
3936
3937 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3938 JVMWrapper("JVM_NewArray");
3939 JvmtiVMObjectAllocEventCollector oam;
3940 oop element_mirror = JNIHandles::resolve(eltClass);
3941 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3942 return JNIHandles::make_local(env, result);
3943 JVM_END
3944
3945
3946 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3947 JVMWrapper("JVM_NewMultiArray");
3948 JvmtiVMObjectAllocEventCollector oam;
3949 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3950 oop element_mirror = JNIHandles::resolve(eltClass);
3951 assert(dim_array->is_typeArray(), "just checking");
3952 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3953 return JNIHandles::make_local(env, result);
3954 JVM_END
3955
3956
3957 // Networking library support ////////////////////////////////////////////////////////////////////
3958
3959 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3960 JVMWrapper("JVM_InitializeSocketLibrary");
3961 return 0;
3962 JVM_END
3963
3964
3965 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3966 JVMWrapper("JVM_Socket");
3967 return os::socket(domain, type, protocol);
3968 JVM_END
3969
3970
3971 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3972 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3973 //%note jvm_r6
3974 return os::socket_close(fd);
3975 JVM_END
3976
3977
3978 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3979 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3980 //%note jvm_r6
3981 return os::socket_shutdown(fd, howto);
3982 JVM_END
3983
3984
3985 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3986 JVMWrapper2("JVM_Recv (0x%x)", fd);
3987 //%note jvm_r6
3988 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3989 JVM_END
3990
3991
3992 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3993 JVMWrapper2("JVM_Send (0x%x)", fd);
3994 //%note jvm_r6
3995 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3996 JVM_END
3997
3998
3999 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
4000 JVMWrapper2("JVM_Timeout (0x%x)", fd);
4001 //%note jvm_r6
4002 return os::timeout(fd, timeout);
4003 JVM_END
4004
4005
4006 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
4007 JVMWrapper2("JVM_Listen (0x%x)", fd);
4008 //%note jvm_r6
4009 return os::listen(fd, count);
4010 JVM_END
4011
4012
4013 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
4014 JVMWrapper2("JVM_Connect (0x%x)", fd);
4015 //%note jvm_r6
4016 return os::connect(fd, him, (socklen_t)len);
4017 JVM_END
4018
4019
4020 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
4021 JVMWrapper2("JVM_Bind (0x%x)", fd);
4022 //%note jvm_r6
4023 return os::bind(fd, him, (socklen_t)len);
4024 JVM_END
4025
4026
4027 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
4028 JVMWrapper2("JVM_Accept (0x%x)", fd);
4029 //%note jvm_r6
4030 socklen_t socklen = (socklen_t)(*len);
4031 jint result = os::accept(fd, him, &socklen);
4032 *len = (jint)socklen;
4033 return result;
4034 JVM_END
4035
4036
4037 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
4038 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
4039 //%note jvm_r6
4040 socklen_t socklen = (socklen_t)(*fromlen);
4041 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
4042 *fromlen = (int)socklen;
4043 return result;
4044 JVM_END
4045
4046
4047 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
4048 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
4049 //%note jvm_r6
4050 socklen_t socklen = (socklen_t)(*len);
4051 jint result = os::get_sock_name(fd, him, &socklen);
4052 *len = (int)socklen;
4053 return result;
4054 JVM_END
4055
4056
4057 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
4058 JVMWrapper2("JVM_SendTo (0x%x)", fd);
4059 //%note jvm_r6
4060 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
4061 JVM_END
4062
4063
4064 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
4065 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
4066 //%note jvm_r6
4067 return os::socket_available(fd, pbytes);
4068 JVM_END
4069
4070
4071 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
4072 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4073 //%note jvm_r6
4074 socklen_t socklen = (socklen_t)(*optlen);
4075 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
4076 *optlen = (int)socklen;
4077 return result;
4078 JVM_END
4079
4080
4081 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
4082 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4083 //%note jvm_r6
4084 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
4085 JVM_END
4086
4087
4088 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
4089 JVMWrapper("JVM_GetHostName");
4090 return os::get_host_name(name, namelen);
4091 JVM_END
4092
4093
4094 // Library support ///////////////////////////////////////////////////////////////////////////
4095
4096 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
4097 //%note jvm_ct
4098 JVMWrapper2("JVM_LoadLibrary (%s)", name);
4099 char ebuf[1024];
4100 void *load_result;
4101 {
4102 ThreadToNativeFromVM ttnfvm(thread);
4103 load_result = os::dll_load(name, ebuf, sizeof ebuf);
4104 }
4105 if (load_result == NULL) {
4106 char msg[1024];
4107 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
4108 // Since 'ebuf' may contain a string encoded using
4109 // platform encoding scheme, we need to pass
4110 // Exceptions::unsafe_to_utf8 to the new_exception method
4111 // as the last argument. See bug 6367357.
4112 Handle h_exception =
4113 Exceptions::new_exception(thread,
4114 vmSymbols::java_lang_UnsatisfiedLinkError(),
4115 msg, Exceptions::unsafe_to_utf8);
4116
4117 THROW_HANDLE_0(h_exception);
4118 }
4119 return load_result;
4120 JVM_END
4121
4122
4123 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
4124 JVMWrapper("JVM_UnloadLibrary");
4125 os::dll_unload(handle);
4126 JVM_END
4127
4128
4129 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
4130 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
4131 return os::dll_lookup(handle, name);
4132 JVM_END
4133
4134
4135 // Floating point support ////////////////////////////////////////////////////////////////////
4136
4137 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
4138 JVMWrapper("JVM_IsNaN");
4139 return g_isnan(a);
4140 JVM_END
4141
4142
4143 // JNI version ///////////////////////////////////////////////////////////////////////////////
4144
4145 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
4146 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
4147 return Threads::is_supported_jni_version_including_1_1(version);
4148 JVM_END
4149
4150
4151 // String support ///////////////////////////////////////////////////////////////////////////
4152
4153 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4154 JVMWrapper("JVM_InternString");
4155 JvmtiVMObjectAllocEventCollector oam;
4156 if (str == NULL) return NULL;
4157 oop string = JNIHandles::resolve_non_null(str);
4158 oop result = StringTable::intern(string, CHECK_NULL);
4159 return (jstring) JNIHandles::make_local(env, result);
4160 JVM_END
4161
4162
4163 // Raw monitor support //////////////////////////////////////////////////////////////////////
4164
4165 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4166 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4167 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4168 // that only works with java threads.
4169
4170
4171 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4172 VM_Exit::block_if_vm_exited();
4173 JVMWrapper("JVM_RawMonitorCreate");
4174 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4175 }
4176
4177
4178 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4179 VM_Exit::block_if_vm_exited();
4180 JVMWrapper("JVM_RawMonitorDestroy");
4181 delete ((Mutex*) mon);
4182 }
4183
4184
4185 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4186 VM_Exit::block_if_vm_exited();
4187 JVMWrapper("JVM_RawMonitorEnter");
4188 ((Mutex*) mon)->jvm_raw_lock();
4189 return 0;
4190 }
4191
4192
4193 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4194 VM_Exit::block_if_vm_exited();
4195 JVMWrapper("JVM_RawMonitorExit");
4196 ((Mutex*) mon)->jvm_raw_unlock();
4197 }
4198
4199
4200 // Support for Serialization
4201
4202 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4203 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4204 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4205 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4206
4207 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4208 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4209 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4210 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4211
4212
4213 void initialize_converter_functions() {
4214 if (JDK_Version::is_gte_jdk14x_version()) {
4215 // These functions only exist for compatibility with 1.3.1 and earlier
4216 return;
4217 }
4218
4219 // called from universe_post_init()
4220 assert(
4221 int_bits_to_float_fn == NULL &&
4222 long_bits_to_double_fn == NULL &&
4223 float_to_int_bits_fn == NULL &&
4224 double_to_long_bits_fn == NULL ,
4225 "initialization done twice"
4226 );
4227 // initialize
4228 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4229 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4230 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4231 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4232 // verify
4233 assert(
4234 int_bits_to_float_fn != NULL &&
4235 long_bits_to_double_fn != NULL &&
4236 float_to_int_bits_fn != NULL &&
4237 double_to_long_bits_fn != NULL ,
4238 "initialization failed"
4239 );
4240 }
4241
4242
4243
4244 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4245
4246 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4247 Handle loader, Handle protection_domain,
4248 jboolean throwError, TRAPS) {
4249 // Security Note:
4250 // The Java level wrapper will perform the necessary security check allowing
4251 // us to pass the NULL as the initiating class loader. The VM is responsible for
4252 // the checkPackageAccess relative to the initiating class loader via the
4253 // protection_domain. The protection_domain is passed as NULL by the java code
4254 // if there is no security manager in 3-arg Class.forName().
4255 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4256
4257 KlassHandle klass_handle(THREAD, klass);
4258 // Check if we should initialize the class
4259 if (init && klass_handle->oop_is_instance()) {
4260 klass_handle->initialize(CHECK_NULL);
4261 }
4262 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4263 }
4264
4265
4266 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4267
4268 #ifndef PRODUCT
4269
4270 extern "C" {
4271 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4272 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4273 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4274 }
4275
4276 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4277 JVMWrapper("JVM_AccessBoolVMFlag");
4278 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4279 JVM_END
4280
4281 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4282 JVMWrapper("JVM_AccessVMIntFlag");
4283 intx v;
4284 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4285 *value = (jint)v;
4286 return result;
4287 JVM_END
4288
4289
4290 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4291 JVMWrapper("JVM_VMBreakPoint");
4292 oop the_obj = JNIHandles::resolve(obj);
4293 BREAKPOINT;
4294 JVM_END
4295
4296
4297 #endif
4298
4299
4300 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4301
4302 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4303 JVMWrapper("JVM_InvokeMethod");
4304 Handle method_handle;
4305 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4306 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4307 Handle receiver(THREAD, JNIHandles::resolve(obj));
4308 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4309 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4310 jobject res = JNIHandles::make_local(env, result);
4311 if (JvmtiExport::should_post_vm_object_alloc()) {
4312 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4313 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4314 if (java_lang_Class::is_primitive(ret_type)) {
4315 // Only for primitive type vm allocates memory for java object.
4316 // See box() method.
4317 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4318 }
4319 }
4320 return res;
4321 } else {
4322 THROW_0(vmSymbols::java_lang_StackOverflowError());
4323 }
4324 JVM_END
4325
4326
4327 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4328 JVMWrapper("JVM_NewInstanceFromConstructor");
4329 oop constructor_mirror = JNIHandles::resolve(c);
4330 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4331 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4332 jobject res = JNIHandles::make_local(env, result);
4333 if (JvmtiExport::should_post_vm_object_alloc()) {
4334 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4335 }
4336 return res;
4337 JVM_END
4338
4339 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4340
4341 JVM_LEAF(jboolean, JVM_SupportsCX8())
4342 JVMWrapper("JVM_SupportsCX8");
4343 return VM_Version::supports_cx8();
4344 JVM_END
4345
4346
4347 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4348 JVMWrapper("JVM_CX8Field");
4349 jlong res;
4350 oop o = JNIHandles::resolve(obj);
4351 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4352 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4353
4354 assert(VM_Version::supports_cx8(), "cx8 not supported");
4355 res = Atomic::cmpxchg(newVal, addr, oldVal);
4356
4357 return res == oldVal;
4358 JVM_END
4359
4360 // DTrace ///////////////////////////////////////////////////////////////////
4361
4362 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4363 JVMWrapper("JVM_DTraceGetVersion");
4364 return (jint)JVM_TRACING_DTRACE_VERSION;
4365 JVM_END
4366
4367 JVM_ENTRY(jlong,JVM_DTraceActivate(
4368 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4369 JVM_DTraceProvider* providers))
4370 JVMWrapper("JVM_DTraceActivate");
4371 return DTraceJSDT::activate(
4372 version, module_name, providers_count, providers, CHECK_0);
4373 JVM_END
4374
4375 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4376 JVMWrapper("JVM_DTraceIsProbeEnabled");
4377 return DTraceJSDT::is_probe_enabled(method);
4378 JVM_END
4379
4380 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4381 JVMWrapper("JVM_DTraceDispose");
4382 DTraceJSDT::dispose(handle);
4383 JVM_END
4384
4385 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4386 JVMWrapper("JVM_DTraceIsSupported");
4387 return DTraceJSDT::is_supported();
4388 JVM_END
4389
4390 // Returns an array of all live Thread objects (VM internal JavaThreads,
4391 // jvmti agent threads, and JNI attaching threads are skipped)
4392 // See CR 6404306 regarding JNI attaching threads
4393 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4394 ResourceMark rm(THREAD);
4395 ThreadsListEnumerator tle(THREAD, false, false);
4396 JvmtiVMObjectAllocEventCollector oam;
4397
4398 int num_threads = tle.num_threads();
4399 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4400 objArrayHandle threads_ah(THREAD, r);
4401
4402 for (int i = 0; i < num_threads; i++) {
4403 Handle h = tle.get_threadObj(i);
4404 threads_ah->obj_at_put(i, h());
4405 }
4406
4407 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4408 JVM_END
4409
4410
4411 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4412 // Return StackTraceElement[][], each element is the stack trace of a thread in
4413 // the corresponding entry in the given threads array
4414 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4415 JVMWrapper("JVM_DumpThreads");
4416 JvmtiVMObjectAllocEventCollector oam;
4417
4418 // Check if threads is null
4419 if (threads == NULL) {
4420 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4421 }
4422
4423 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4424 objArrayHandle ah(THREAD, a);
4425 int num_threads = ah->length();
4426 // check if threads is non-empty array
4427 if (num_threads == 0) {
4428 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4429 }
4430
4431 // check if threads is not an array of objects of Thread class
4432 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4433 if (k != SystemDictionary::Thread_klass()) {
4434 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4435 }
4436
4437 ResourceMark rm(THREAD);
4438
4439 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4440 for (int i = 0; i < num_threads; i++) {
4441 oop thread_obj = ah->obj_at(i);
4442 instanceHandle h(THREAD, (instanceOop) thread_obj);
4443 thread_handle_array->append(h);
4444 }
4445
4446 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4447 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4448
4449 JVM_END
4450
4451 // JVM monitoring and management support
4452 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4453 return Management::get_jmm_interface(version);
4454 JVM_END
4455
4456 // com.sun.tools.attach.VirtualMachine agent properties support
4457 //
4458 // Initialize the agent properties with the properties maintained in the VM
4459 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4460 JVMWrapper("JVM_InitAgentProperties");
4461 ResourceMark rm;
4462
4463 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4464
4465 PUTPROP(props, "sun.java.command", Arguments::java_command());
4466 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4467 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4468 return properties;
4469 JVM_END
4470
4471 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4472 {
4473 JVMWrapper("JVM_GetEnclosingMethodInfo");
4474 JvmtiVMObjectAllocEventCollector oam;
4475
4476 if (ofClass == NULL) {
4477 return NULL;
4478 }
4479 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4480 // Special handling for primitive objects
4481 if (java_lang_Class::is_primitive(mirror())) {
4482 return NULL;
4483 }
4484 Klass* k = java_lang_Class::as_Klass(mirror());
4485 if (!k->oop_is_instance()) {
4486 return NULL;
4487 }
4488 instanceKlassHandle ik_h(THREAD, k);
4489 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4490 if (encl_method_class_idx == 0) {
4491 return NULL;
4492 }
4493 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4494 objArrayHandle dest(THREAD, dest_o);
4495 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4496 dest->obj_at_put(0, enc_k->java_mirror());
4497 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4498 if (encl_method_method_idx != 0) {
4499 Symbol* sym = ik_h->constants()->symbol_at(
4500 extract_low_short_from_int(
4501 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4502 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4503 dest->obj_at_put(1, str());
4504 sym = ik_h->constants()->symbol_at(
4505 extract_high_short_from_int(
4506 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4507 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4508 dest->obj_at_put(2, str());
4509 }
4510 return (jobjectArray) JNIHandles::make_local(dest());
4511 }
4512 JVM_END
4513
4514 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4515 jint javaThreadState))
4516 {
4517 // If new thread states are added in future JDK and VM versions,
4518 // this should check if the JDK version is compatible with thread
4519 // states supported by the VM. Return NULL if not compatible.
4520 //
4521 // This function must map the VM java_lang_Thread::ThreadStatus
4522 // to the Java thread state that the JDK supports.
4523 //
4524
4525 typeArrayHandle values_h;
4526 switch (javaThreadState) {
4527 case JAVA_THREAD_STATE_NEW : {
4528 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4529 values_h = typeArrayHandle(THREAD, r);
4530 values_h->int_at_put(0, java_lang_Thread::NEW);
4531 break;
4532 }
4533 case JAVA_THREAD_STATE_RUNNABLE : {
4534 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4535 values_h = typeArrayHandle(THREAD, r);
4536 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4537 break;
4538 }
4539 case JAVA_THREAD_STATE_BLOCKED : {
4540 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4541 values_h = typeArrayHandle(THREAD, r);
4542 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4543 break;
4544 }
4545 case JAVA_THREAD_STATE_WAITING : {
4546 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4547 values_h = typeArrayHandle(THREAD, r);
4548 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4549 values_h->int_at_put(1, java_lang_Thread::PARKED);
4550 break;
4551 }
4552 case JAVA_THREAD_STATE_TIMED_WAITING : {
4553 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4554 values_h = typeArrayHandle(THREAD, r);
4555 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4556 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4557 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4558 break;
4559 }
4560 case JAVA_THREAD_STATE_TERMINATED : {
4561 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4562 values_h = typeArrayHandle(THREAD, r);
4563 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4564 break;
4565 }
4566 default:
4567 // Unknown state - probably incompatible JDK version
4568 return NULL;
4569 }
4570
4571 return (jintArray) JNIHandles::make_local(env, values_h());
4572 }
4573 JVM_END
4574
4575
4576 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4577 jint javaThreadState,
4578 jintArray values))
4579 {
4580 // If new thread states are added in future JDK and VM versions,
4581 // this should check if the JDK version is compatible with thread
4582 // states supported by the VM. Return NULL if not compatible.
4583 //
4584 // This function must map the VM java_lang_Thread::ThreadStatus
4585 // to the Java thread state that the JDK supports.
4586 //
4587
4588 ResourceMark rm;
4589
4590 // Check if threads is null
4591 if (values == NULL) {
4592 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4593 }
4594
4595 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4596 typeArrayHandle values_h(THREAD, v);
4597
4598 objArrayHandle names_h;
4599 switch (javaThreadState) {
4600 case JAVA_THREAD_STATE_NEW : {
4601 assert(values_h->length() == 1 &&
4602 values_h->int_at(0) == java_lang_Thread::NEW,
4603 "Invalid threadStatus value");
4604
4605 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4606 1, /* only 1 substate */
4607 CHECK_NULL);
4608 names_h = objArrayHandle(THREAD, r);
4609 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4610 names_h->obj_at_put(0, name());
4611 break;
4612 }
4613 case JAVA_THREAD_STATE_RUNNABLE : {
4614 assert(values_h->length() == 1 &&
4615 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4616 "Invalid threadStatus value");
4617
4618 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4619 1, /* only 1 substate */
4620 CHECK_NULL);
4621 names_h = objArrayHandle(THREAD, r);
4622 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4623 names_h->obj_at_put(0, name());
4624 break;
4625 }
4626 case JAVA_THREAD_STATE_BLOCKED : {
4627 assert(values_h->length() == 1 &&
4628 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4629 "Invalid threadStatus value");
4630
4631 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4632 1, /* only 1 substate */
4633 CHECK_NULL);
4634 names_h = objArrayHandle(THREAD, r);
4635 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4636 names_h->obj_at_put(0, name());
4637 break;
4638 }
4639 case JAVA_THREAD_STATE_WAITING : {
4640 assert(values_h->length() == 2 &&
4641 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4642 values_h->int_at(1) == java_lang_Thread::PARKED,
4643 "Invalid threadStatus value");
4644 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4645 2, /* number of substates */
4646 CHECK_NULL);
4647 names_h = objArrayHandle(THREAD, r);
4648 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4649 CHECK_NULL);
4650 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4651 CHECK_NULL);
4652 names_h->obj_at_put(0, name0());
4653 names_h->obj_at_put(1, name1());
4654 break;
4655 }
4656 case JAVA_THREAD_STATE_TIMED_WAITING : {
4657 assert(values_h->length() == 3 &&
4658 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4659 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4660 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4661 "Invalid threadStatus value");
4662 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4663 3, /* number of substates */
4664 CHECK_NULL);
4665 names_h = objArrayHandle(THREAD, r);
4666 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4667 CHECK_NULL);
4668 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4669 CHECK_NULL);
4670 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4671 CHECK_NULL);
4672 names_h->obj_at_put(0, name0());
4673 names_h->obj_at_put(1, name1());
4674 names_h->obj_at_put(2, name2());
4675 break;
4676 }
4677 case JAVA_THREAD_STATE_TERMINATED : {
4678 assert(values_h->length() == 1 &&
4679 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4680 "Invalid threadStatus value");
4681 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4682 1, /* only 1 substate */
4683 CHECK_NULL);
4684 names_h = objArrayHandle(THREAD, r);
4685 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4686 names_h->obj_at_put(0, name());
4687 break;
4688 }
4689 default:
4690 // Unknown state - probably incompatible JDK version
4691 return NULL;
4692 }
4693 return (jobjectArray) JNIHandles::make_local(env, names_h());
4694 }
4695 JVM_END
4696
4697 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4698 {
4699 memset(info, 0, info_size);
4700
4701 info->jvm_version = Abstract_VM_Version::jvm_version();
4702 info->update_version = 0; /* 0 in HotSpot Express VM */
4703 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4704
4705 // when we add a new capability in the jvm_version_info struct, we should also
4706 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4707 // counter defined in runtimeService.cpp.
4708 info->is_attachable = AttachListener::is_attach_supported();
4709 }
4710 JVM_END