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