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 || UseShenandoahGC) {
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 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1154 JVMWrapper2("JVM_DefineClass %s", name);
1155
1156 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1157 JVM_END
1158
1159
1160 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1161 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1162
1163 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1164 JVM_END
1165
1166 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1167 jobject loader, const jbyte *buf,
1168 jsize len, jobject pd,
1169 const char *source, jboolean verify))
1170 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1171
1172 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1173 JVM_END
1174
1175 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1176 JVMWrapper("JVM_FindLoadedClass");
1177 ResourceMark rm(THREAD);
1178
1179 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1180 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1181
1182 const char* str = java_lang_String::as_utf8_string(string());
1183 // Sanity check, don't expect null
1184 if (str == NULL) return NULL;
1185
1186 const int str_len = (int)strlen(str);
1187 if (str_len > Symbol::max_length()) {
1188 // It's impossible to create this class; the name cannot fit
1189 // into the constant pool.
1190 return NULL;
1191 }
1192 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1193
1194 // Security Note:
1195 // The Java level wrapper will perform the necessary security check allowing
1196 // us to pass the NULL as the initiating class loader.
1197 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1198 if (UsePerfData) {
1199 is_lock_held_by_thread(h_loader,
1200 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1201 THREAD);
1202 }
1203
1204 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1205 h_loader,
1206 Handle(),
1207 CHECK_NULL);
1208 #if INCLUDE_CDS
1209 if (k == NULL) {
1210 // If the class is not already loaded, try to see if it's in the shared
1211 // archive for the current classloader (h_loader).
1212 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1213 klass_name, h_loader, CHECK_NULL);
1214 k = ik();
1215 }
1216 #endif
1217 return (k == NULL) ? NULL :
1218 (jclass) JNIHandles::make_local(env, k->java_mirror());
1219 JVM_END
1220
1221
1222 // Reflection support //////////////////////////////////////////////////////////////////////////////
1223
1224 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1225 assert (cls != NULL, "illegal class");
1226 JVMWrapper("JVM_GetClassName");
1227 JvmtiVMObjectAllocEventCollector oam;
1228 ResourceMark rm(THREAD);
1229 const char* name;
1230 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1231 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1232 } else {
1233 // Consider caching interned string in Klass
1234 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1235 assert(k->is_klass(), "just checking");
1236 name = k->external_name();
1237 }
1238 oop result = StringTable::intern((char*) name, CHECK_NULL);
1239 return (jstring) JNIHandles::make_local(env, result);
1240 JVM_END
1241
1242
1243 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1244 JVMWrapper("JVM_GetClassInterfaces");
1245 JvmtiVMObjectAllocEventCollector oam;
1246 oop mirror = JNIHandles::resolve_non_null(cls);
1247
1248 // Special handling for primitive objects
1249 if (java_lang_Class::is_primitive(mirror)) {
1250 // Primitive objects does not have any interfaces
1251 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1252 return (jobjectArray) JNIHandles::make_local(env, r);
1253 }
1254
1255 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1256 // Figure size of result array
1257 int size;
1258 if (klass->oop_is_instance()) {
1259 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1260 } else {
1261 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1262 size = 2;
1263 }
1264
1265 // Allocate result array
1266 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1267 objArrayHandle result (THREAD, r);
1268 // Fill in result
1269 if (klass->oop_is_instance()) {
1270 // Regular instance klass, fill in all local interfaces
1271 for (int index = 0; index < size; index++) {
1272 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1273 result->obj_at_put(index, k->java_mirror());
1274 }
1275 } else {
1276 // All arrays implement java.lang.Cloneable and java.io.Serializable
1277 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1278 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1279 }
1280 return (jobjectArray) JNIHandles::make_local(env, result());
1281 JVM_END
1282
1283
1284 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1285 JVMWrapper("JVM_GetClassLoader");
1286 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1287 return NULL;
1288 }
1289 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1290 oop loader = k->class_loader();
1291 return JNIHandles::make_local(env, loader);
1292 JVM_END
1293
1294
1295 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1296 JVMWrapper("JVM_IsInterface");
1297 oop mirror = JNIHandles::resolve_non_null(cls);
1298 if (java_lang_Class::is_primitive(mirror)) {
1299 return JNI_FALSE;
1300 }
1301 Klass* k = java_lang_Class::as_Klass(mirror);
1302 jboolean result = k->is_interface();
1303 assert(!result || k->oop_is_instance(),
1304 "all interfaces are instance types");
1305 // The compiler intrinsic for isInterface tests the
1306 // Klass::_access_flags bits in the same way.
1307 return result;
1308 JVM_END
1309
1310
1311 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1312 JVMWrapper("JVM_GetClassSigners");
1313 JvmtiVMObjectAllocEventCollector oam;
1314 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1315 // There are no signers for primitive types
1316 return NULL;
1317 }
1318
1319 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1320
1321 // If there are no signers set in the class, or if the class
1322 // is an array, return NULL.
1323 if (signers == NULL) return NULL;
1324
1325 // copy of the signers array
1326 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1327 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1328 for (int index = 0; index < signers->length(); index++) {
1329 signers_copy->obj_at_put(index, signers->obj_at(index));
1330 }
1331
1332 // return the copy
1333 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1334 JVM_END
1335
1336
1337 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1338 JVMWrapper("JVM_SetClassSigners");
1339 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1340 // This call is ignored for primitive types and arrays.
1341 // Signers are only set once, ClassLoader.java, and thus shouldn't
1342 // be called with an array. Only the bootstrap loader creates arrays.
1343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1344 if (k->oop_is_instance()) {
1345 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1346 }
1347 }
1348 JVM_END
1349
1350
1351 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1352 JVMWrapper("JVM_GetProtectionDomain");
1353 if (JNIHandles::resolve(cls) == NULL) {
1354 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1355 }
1356
1357 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1358 // Primitive types does not have a protection domain.
1359 return NULL;
1360 }
1361
1362 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1363 return (jobject) JNIHandles::make_local(env, pd);
1364 JVM_END
1365
1366
1367 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1368 // If there is a security manager and protection domain, check the access
1369 // in the protection domain, otherwise it is authorized.
1370 if (java_lang_System::has_security_manager()) {
1371
1372 // For bootstrapping, if pd implies method isn't in the JDK, allow
1373 // this context to revert to older behavior.
1374 // In this case the isAuthorized field in AccessControlContext is also not
1375 // present.
1376 if (Universe::protection_domain_implies_method() == NULL) {
1377 return true;
1378 }
1379
1380 // Whitelist certain access control contexts
1381 if (java_security_AccessControlContext::is_authorized(context)) {
1382 return true;
1383 }
1384
1385 oop prot = klass->protection_domain();
1386 if (prot != NULL) {
1387 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1388 // in the new wrapper.
1389 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1390 Handle h_prot(THREAD, prot);
1391 JavaValue result(T_BOOLEAN);
1392 JavaCallArguments args(h_prot);
1393 JavaCalls::call(&result, m, &args, CHECK_false);
1394 return (result.get_jboolean() != 0);
1395 }
1396 }
1397 return true;
1398 }
1399
1400 // Create an AccessControlContext with a protection domain with null codesource
1401 // and null permissions - which gives no permissions.
1402 oop create_dummy_access_control_context(TRAPS) {
1403 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1404 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1405 // Call constructor ProtectionDomain(null, null);
1406 JavaValue result(T_VOID);
1407 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1408 vmSymbols::object_initializer_name(),
1409 vmSymbols::codesource_permissioncollection_signature(),
1410 Handle(), Handle(), CHECK_NULL);
1411
1412 // new ProtectionDomain[] {pd};
1413 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1414 context->obj_at_put(0, obj());
1415
1416 // new AccessControlContext(new ProtectionDomain[] {pd})
1417 objArrayHandle h_context(THREAD, context);
1418 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1419 return acc;
1420 }
1421
1422 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1423 JVMWrapper("JVM_DoPrivileged");
1424
1425 if (action == NULL) {
1426 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1427 }
1428
1429 // Compute the frame initiating the do privileged operation and setup the privileged stack
1430 vframeStream vfst(thread);
1431 vfst.security_get_caller_frame(1);
1432
1433 if (vfst.at_end()) {
1434 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1435 }
1436
1437 Method* method = vfst.method();
1438 instanceKlassHandle klass (THREAD, method->method_holder());
1439
1440 // Check that action object understands "Object run()"
1441 Handle h_context;
1442 if (context != NULL) {
1443 h_context = Handle(THREAD, JNIHandles::resolve(context));
1444 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1445 if (!authorized) {
1446 // Create an unprivileged access control object and call it's run function
1447 // instead.
1448 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1449 h_context = Handle(THREAD, noprivs);
1450 }
1451 }
1452
1453 // Check that action object understands "Object run()"
1454 Handle object (THREAD, JNIHandles::resolve(action));
1455
1456 // get run() method
1457 Method* m_oop = object->klass()->uncached_lookup_method(
1458 vmSymbols::run_method_name(),
1459 vmSymbols::void_object_signature(),
1460 Klass::find_overpass);
1461 methodHandle m (THREAD, m_oop);
1462 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1463 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1464 }
1465
1466 // Stack allocated list of privileged stack elements
1467 PrivilegedElement pi;
1468 if (!vfst.at_end()) {
1469 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1470 thread->set_privileged_stack_top(&pi);
1471 }
1472
1473
1474 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1475 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1476 Handle pending_exception;
1477 JavaValue result(T_OBJECT);
1478 JavaCallArguments args(object);
1479 JavaCalls::call(&result, m, &args, THREAD);
1480
1481 // done with action, remove ourselves from the list
1482 if (!vfst.at_end()) {
1483 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1484 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1485 }
1486
1487 if (HAS_PENDING_EXCEPTION) {
1488 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1489 CLEAR_PENDING_EXCEPTION;
1490 // JVMTI has already reported the pending exception
1491 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1492 if (THREAD->is_Java_thread()) {
1493 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1494 }
1495 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1496 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1497 // Throw a java.security.PrivilegedActionException(Exception e) exception
1498 JavaCallArguments args(pending_exception);
1499 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1500 vmSymbols::exception_void_signature(),
1501 &args);
1502 }
1503 }
1504
1505 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1506 return JNIHandles::make_local(env, (oop) result.get_jobject());
1507 JVM_END
1508
1509
1510 // Returns the inherited_access_control_context field of the running thread.
1511 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1512 JVMWrapper("JVM_GetInheritedAccessControlContext");
1513 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1514 return JNIHandles::make_local(env, result);
1515 JVM_END
1516
1517 class RegisterArrayForGC {
1518 private:
1519 JavaThread *_thread;
1520 public:
1521 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1522 _thread = thread;
1523 _thread->register_array_for_gc(array);
1524 }
1525
1526 ~RegisterArrayForGC() {
1527 _thread->register_array_for_gc(NULL);
1528 }
1529 };
1530
1531
1532 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1533 JVMWrapper("JVM_GetStackAccessControlContext");
1534 if (!UsePrivilegedStack) return NULL;
1535
1536 ResourceMark rm(THREAD);
1537 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1538 JvmtiVMObjectAllocEventCollector oam;
1539
1540 // count the protection domains on the execution stack. We collapse
1541 // duplicate consecutive protection domains into a single one, as
1542 // well as stopping when we hit a privileged frame.
1543
1544 // Use vframeStream to iterate through Java frames
1545 vframeStream vfst(thread);
1546
1547 oop previous_protection_domain = NULL;
1548 Handle privileged_context(thread, NULL);
1549 bool is_privileged = false;
1550 oop protection_domain = NULL;
1551
1552 for(; !vfst.at_end(); vfst.next()) {
1553 // get method of frame
1554 Method* method = vfst.method();
1555 intptr_t* frame_id = vfst.frame_id();
1556
1557 // check the privileged frames to see if we have a match
1558 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1559 // this frame is privileged
1560 is_privileged = true;
1561 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1562 protection_domain = thread->privileged_stack_top()->protection_domain();
1563 } else {
1564 protection_domain = method->method_holder()->protection_domain();
1565 }
1566
1567 if ((previous_protection_domain != protection_domain) && protection_domain != NULL) {
1568 local_array->push(protection_domain);
1569 previous_protection_domain = protection_domain;
1570 }
1571
1572 if (is_privileged) break;
1573 }
1574
1575
1576 // either all the domains on the stack were system domains, or
1577 // we had a privileged system domain
1578 if (local_array->is_empty()) {
1579 if (is_privileged && privileged_context.is_null()) return NULL;
1580
1581 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1582 return JNIHandles::make_local(env, result);
1583 }
1584
1585 // the resource area must be registered in case of a gc
1586 RegisterArrayForGC ragc(thread, local_array);
1587 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1588 local_array->length(), CHECK_NULL);
1589 objArrayHandle h_context(thread, context);
1590 for (int index = 0; index < local_array->length(); index++) {
1591 h_context->obj_at_put(index, local_array->at(index));
1592 }
1593
1594 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1595
1596 return JNIHandles::make_local(env, result);
1597 JVM_END
1598
1599
1600 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1601 JVMWrapper("JVM_IsArrayClass");
1602 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1603 return (k != NULL) && k->oop_is_array() ? true : false;
1604 JVM_END
1605
1606
1607 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1608 JVMWrapper("JVM_IsPrimitiveClass");
1609 oop mirror = JNIHandles::resolve_non_null(cls);
1610 return (jboolean) java_lang_Class::is_primitive(mirror);
1611 JVM_END
1612
1613
1614 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1615 JVMWrapper("JVM_GetComponentType");
1616 oop mirror = JNIHandles::resolve_non_null(cls);
1617 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1618 return (jclass) JNIHandles::make_local(env, result);
1619 JVM_END
1620
1621
1622 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1623 JVMWrapper("JVM_GetClassModifiers");
1624 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1625 // Primitive type
1626 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1627 }
1628
1629 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1630 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1631 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1632 return k->modifier_flags();
1633 JVM_END
1634
1635
1636 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1637
1638 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1639 JvmtiVMObjectAllocEventCollector oam;
1640 // ofClass is a reference to a java_lang_Class object. The mirror object
1641 // of an InstanceKlass
1642
1643 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1644 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1645 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1646 return (jobjectArray)JNIHandles::make_local(env, result);
1647 }
1648
1649 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1650 InnerClassesIterator iter(k);
1651
1652 if (iter.length() == 0) {
1653 // Neither an inner nor outer class
1654 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1655 return (jobjectArray)JNIHandles::make_local(env, result);
1656 }
1657
1658 // find inner class info
1659 constantPoolHandle cp(thread, k->constants());
1660 int length = iter.length();
1661
1662 // Allocate temp. result array
1663 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1664 objArrayHandle result (THREAD, r);
1665 int members = 0;
1666
1667 for (; !iter.done(); iter.next()) {
1668 int ioff = iter.inner_class_info_index();
1669 int ooff = iter.outer_class_info_index();
1670
1671 if (ioff != 0 && ooff != 0) {
1672 // Check to see if the name matches the class we're looking for
1673 // before attempting to find the class.
1674 if (cp->klass_name_at_matches(k, ooff)) {
1675 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1676 if (outer_klass == k()) {
1677 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1678 instanceKlassHandle inner_klass (THREAD, ik);
1679
1680 // Throws an exception if outer klass has not declared k as
1681 // an inner klass
1682 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1683
1684 result->obj_at_put(members, inner_klass->java_mirror());
1685 members++;
1686 }
1687 }
1688 }
1689 }
1690
1691 if (members != length) {
1692 // Return array of right length
1693 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1694 for(int i = 0; i < members; i++) {
1695 res->obj_at_put(i, result->obj_at(i));
1696 }
1697 return (jobjectArray)JNIHandles::make_local(env, res);
1698 }
1699
1700 return (jobjectArray)JNIHandles::make_local(env, result());
1701 JVM_END
1702
1703
1704 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1705 {
1706 // ofClass is a reference to a java_lang_Class object.
1707 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1708 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1709 return NULL;
1710 }
1711
1712 bool inner_is_member = false;
1713 Klass* outer_klass
1714 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1715 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1716 if (outer_klass == NULL) return NULL; // already a top-level class
1717 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1718 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1719 }
1720 JVM_END
1721
1722 // should be in InstanceKlass.cpp, but is here for historical reasons
1723 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1724 bool* inner_is_member,
1725 TRAPS) {
1726 Thread* thread = THREAD;
1727 InnerClassesIterator iter(k);
1728 if (iter.length() == 0) {
1729 // No inner class info => no declaring class
1730 return NULL;
1731 }
1732
1733 constantPoolHandle i_cp(thread, k->constants());
1734
1735 bool found = false;
1736 Klass* ok;
1737 instanceKlassHandle outer_klass;
1738 *inner_is_member = false;
1739
1740 // Find inner_klass attribute
1741 for (; !iter.done() && !found; iter.next()) {
1742 int ioff = iter.inner_class_info_index();
1743 int ooff = iter.outer_class_info_index();
1744 int noff = iter.inner_name_index();
1745 if (ioff != 0) {
1746 // Check to see if the name matches the class we're looking for
1747 // before attempting to find the class.
1748 if (i_cp->klass_name_at_matches(k, ioff)) {
1749 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1750 found = (k() == inner_klass);
1751 if (found && ooff != 0) {
1752 ok = i_cp->klass_at(ooff, CHECK_NULL);
1753 outer_klass = instanceKlassHandle(thread, ok);
1754 *inner_is_member = true;
1755 }
1756 }
1757 }
1758 }
1759
1760 if (found && outer_klass.is_null()) {
1761 // It may be anonymous; try for that.
1762 int encl_method_class_idx = k->enclosing_method_class_index();
1763 if (encl_method_class_idx != 0) {
1764 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1765 outer_klass = instanceKlassHandle(thread, ok);
1766 *inner_is_member = false;
1767 }
1768 }
1769
1770 // If no inner class attribute found for this class.
1771 if (outer_klass.is_null()) return NULL;
1772
1773 // Throws an exception if outer klass has not declared k as an inner klass
1774 // We need evidence that each klass knows about the other, or else
1775 // the system could allow a spoof of an inner class to gain access rights.
1776 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1777 return outer_klass();
1778 }
1779
1780 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1781 assert (cls != NULL, "illegal class");
1782 JVMWrapper("JVM_GetClassSignature");
1783 JvmtiVMObjectAllocEventCollector oam;
1784 ResourceMark rm(THREAD);
1785 // Return null for arrays and primatives
1786 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1787 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1788 if (k->oop_is_instance()) {
1789 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1790 if (sym == NULL) return NULL;
1791 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1792 return (jstring) JNIHandles::make_local(env, str());
1793 }
1794 }
1795 return NULL;
1796 JVM_END
1797
1798
1799 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1800 assert (cls != NULL, "illegal class");
1801 JVMWrapper("JVM_GetClassAnnotations");
1802
1803 // Return null for arrays and primitives
1804 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1805 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1806 if (k->oop_is_instance()) {
1807 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1808 return (jbyteArray) JNIHandles::make_local(env, a);
1809 }
1810 }
1811 return NULL;
1812 JVM_END
1813
1814
1815 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1816 // some of this code was adapted from from jni_FromReflectedField
1817
1818 oop reflected = JNIHandles::resolve_non_null(field);
1819 oop mirror = java_lang_reflect_Field::clazz(reflected);
1820 Klass* k = java_lang_Class::as_Klass(mirror);
1821 int slot = java_lang_reflect_Field::slot(reflected);
1822 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1823
1824 KlassHandle kh(THREAD, k);
1825 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1826
1827 if (modifiers & JVM_ACC_STATIC) {
1828 // for static fields we only look in the current class
1829 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1830 assert(false, "cannot find static field");
1831 return false;
1832 }
1833 } else {
1834 // for instance fields we start with the current class and work
1835 // our way up through the superclass chain
1836 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1837 assert(false, "cannot find instance field");
1838 return false;
1839 }
1840 }
1841 return true;
1842 }
1843
1844 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1845 // field is a handle to a java.lang.reflect.Field object
1846 assert(field != NULL, "illegal field");
1847 JVMWrapper("JVM_GetFieldAnnotations");
1848
1849 fieldDescriptor fd;
1850 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1851 if (!gotFd) {
1852 return NULL;
1853 }
1854
1855 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1856 JVM_END
1857
1858
1859 static Method* jvm_get_method_common(jobject method) {
1860 // some of this code was adapted from from jni_FromReflectedMethod
1861
1862 oop reflected = JNIHandles::resolve_non_null(method);
1863 oop mirror = NULL;
1864 int slot = 0;
1865
1866 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1867 mirror = java_lang_reflect_Constructor::clazz(reflected);
1868 slot = java_lang_reflect_Constructor::slot(reflected);
1869 } else {
1870 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1871 "wrong type");
1872 mirror = java_lang_reflect_Method::clazz(reflected);
1873 slot = java_lang_reflect_Method::slot(reflected);
1874 }
1875 Klass* k = java_lang_Class::as_Klass(mirror);
1876
1877 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1878 assert(m != NULL, "cannot find method");
1879 return m; // caller has to deal with NULL in product mode
1880 }
1881
1882
1883 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1884 JVMWrapper("JVM_GetMethodAnnotations");
1885
1886 // method is a handle to a java.lang.reflect.Method object
1887 Method* m = jvm_get_method_common(method);
1888 if (m == NULL) {
1889 return NULL;
1890 }
1891
1892 return (jbyteArray) JNIHandles::make_local(env,
1893 Annotations::make_java_array(m->annotations(), THREAD));
1894 JVM_END
1895
1896
1897 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1898 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1899
1900 // method is a handle to a java.lang.reflect.Method object
1901 Method* m = jvm_get_method_common(method);
1902 if (m == NULL) {
1903 return NULL;
1904 }
1905
1906 return (jbyteArray) JNIHandles::make_local(env,
1907 Annotations::make_java_array(m->annotation_default(), THREAD));
1908 JVM_END
1909
1910
1911 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1912 JVMWrapper("JVM_GetMethodParameterAnnotations");
1913
1914 // method is a handle to a java.lang.reflect.Method object
1915 Method* m = jvm_get_method_common(method);
1916 if (m == NULL) {
1917 return NULL;
1918 }
1919
1920 return (jbyteArray) JNIHandles::make_local(env,
1921 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1922 JVM_END
1923
1924 /* Type use annotations support (JDK 1.8) */
1925
1926 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1927 assert (cls != NULL, "illegal class");
1928 JVMWrapper("JVM_GetClassTypeAnnotations");
1929 ResourceMark rm(THREAD);
1930 // Return null for arrays and primitives
1931 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1932 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1933 if (k->oop_is_instance()) {
1934 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1935 if (type_annotations != NULL) {
1936 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1937 return (jbyteArray) JNIHandles::make_local(env, a);
1938 }
1939 }
1940 }
1941 return NULL;
1942 JVM_END
1943
1944 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1945 assert (method != NULL, "illegal method");
1946 JVMWrapper("JVM_GetMethodTypeAnnotations");
1947
1948 // method is a handle to a java.lang.reflect.Method object
1949 Method* m = jvm_get_method_common(method);
1950 if (m == NULL) {
1951 return NULL;
1952 }
1953
1954 AnnotationArray* type_annotations = m->type_annotations();
1955 if (type_annotations != NULL) {
1956 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1957 return (jbyteArray) JNIHandles::make_local(env, a);
1958 }
1959
1960 return NULL;
1961 JVM_END
1962
1963 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1964 assert (field != NULL, "illegal field");
1965 JVMWrapper("JVM_GetFieldTypeAnnotations");
1966
1967 fieldDescriptor fd;
1968 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1969 if (!gotFd) {
1970 return NULL;
1971 }
1972
1973 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1974 JVM_END
1975
1976 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1977 if (!cp->is_within_bounds(index)) {
1978 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1979 }
1980 }
1981
1982 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1983 {
1984 JVMWrapper("JVM_GetMethodParameters");
1985 // method is a handle to a java.lang.reflect.Method object
1986 Method* method_ptr = jvm_get_method_common(method);
1987 methodHandle mh (THREAD, method_ptr);
1988 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1989 const int num_params = mh->method_parameters_length();
1990
1991 if (0 != num_params) {
1992 // make sure all the symbols are properly formatted
1993 for (int i = 0; i < num_params; i++) {
1994 MethodParametersElement* params = mh->method_parameters_start();
1995 int index = params[i].name_cp_index;
1996 bounds_check(mh->constants(), index, CHECK_NULL);
1997
1998 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1999 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
2000 "Wrong type at constant pool index");
2001 }
2002
2003 }
2004
2005 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
2006 objArrayHandle result (THREAD, result_oop);
2007
2008 for (int i = 0; i < num_params; i++) {
2009 MethodParametersElement* params = mh->method_parameters_start();
2010 // For a 0 index, give a NULL symbol
2011 Symbol* sym = 0 != params[i].name_cp_index ?
2012 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
2013 int flags = params[i].flags;
2014 oop param = Reflection::new_parameter(reflected_method, i, sym,
2015 flags, CHECK_NULL);
2016 result->obj_at_put(i, param);
2017 }
2018 return (jobjectArray)JNIHandles::make_local(env, result());
2019 } else {
2020 return (jobjectArray)NULL;
2021 }
2022 }
2023 JVM_END
2024
2025 // New (JDK 1.4) reflection implementation /////////////////////////////////////
2026
2027 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2028 {
2029 JVMWrapper("JVM_GetClassDeclaredFields");
2030 JvmtiVMObjectAllocEventCollector oam;
2031
2032 // Exclude primitive types and array types
2033 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
2034 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2035 // Return empty array
2036 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
2037 return (jobjectArray) JNIHandles::make_local(env, res);
2038 }
2039
2040 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2041 constantPoolHandle cp(THREAD, k->constants());
2042
2043 // Ensure class is linked
2044 k->link_class(CHECK_NULL);
2045
2046 // 4496456 We need to filter out java.lang.Throwable.backtrace
2047 bool skip_backtrace = false;
2048
2049 // Allocate result
2050 int num_fields;
2051
2052 if (publicOnly) {
2053 num_fields = 0;
2054 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
2055 if (fs.access_flags().is_public()) ++num_fields;
2056 }
2057 } else {
2058 num_fields = k->java_fields_count();
2059
2060 if (k() == SystemDictionary::Throwable_klass()) {
2061 num_fields--;
2062 skip_backtrace = true;
2063 }
2064 }
2065
2066 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
2067 objArrayHandle result (THREAD, r);
2068
2069 int out_idx = 0;
2070 fieldDescriptor fd;
2071 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
2072 if (skip_backtrace) {
2073 // 4496456 skip java.lang.Throwable.backtrace
2074 int offset = fs.offset();
2075 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
2076 }
2077
2078 if (!publicOnly || fs.access_flags().is_public()) {
2079 fd.reinitialize(k(), fs.index());
2080 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
2081 result->obj_at_put(out_idx, field);
2082 ++out_idx;
2083 }
2084 }
2085 assert(out_idx == num_fields, "just checking");
2086 return (jobjectArray) JNIHandles::make_local(env, result());
2087 }
2088 JVM_END
2089
2090 static bool select_method(methodHandle method, bool want_constructor) {
2091 if (want_constructor) {
2092 return (method->is_initializer() && !method->is_static());
2093 } else {
2094 return (!method->is_initializer() && !method->is_overpass());
2095 }
2096 }
2097
2098 static jobjectArray get_class_declared_methods_helper(
2099 JNIEnv *env,
2100 jclass ofClass, jboolean publicOnly,
2101 bool want_constructor,
2102 Klass* klass, TRAPS) {
2103
2104 JvmtiVMObjectAllocEventCollector oam;
2105
2106 // Exclude primitive types and array types
2107 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
2108 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2109 // Return empty array
2110 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
2111 return (jobjectArray) JNIHandles::make_local(env, res);
2112 }
2113
2114 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2115
2116 // Ensure class is linked
2117 k->link_class(CHECK_NULL);
2118
2119 Array<Method*>* methods = k->methods();
2120 int methods_length = methods->length();
2121
2122 // Save original method_idnum in case of redefinition, which can change
2123 // the idnum of obsolete methods. The new method will have the same idnum
2124 // but if we refresh the methods array, the counts will be wrong.
2125 ResourceMark rm(THREAD);
2126 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2127 int num_methods = 0;
2128
2129 for (int i = 0; i < methods_length; i++) {
2130 methodHandle method(THREAD, methods->at(i));
2131 if (select_method(method, want_constructor)) {
2132 if (!publicOnly || method->is_public()) {
2133 idnums->push(method->method_idnum());
2134 ++num_methods;
2135 }
2136 }
2137 }
2138
2139 // Allocate result
2140 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2141 objArrayHandle result (THREAD, r);
2142
2143 // Now just put the methods that we selected above, but go by their idnum
2144 // in case of redefinition. The methods can be redefined at any safepoint,
2145 // so above when allocating the oop array and below when creating reflect
2146 // objects.
2147 for (int i = 0; i < num_methods; i++) {
2148 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2149 if (method.is_null()) {
2150 // Method may have been deleted and seems this API can handle null
2151 // Otherwise should probably put a method that throws NSME
2152 result->obj_at_put(i, NULL);
2153 } else {
2154 oop m;
2155 if (want_constructor) {
2156 m = Reflection::new_constructor(method, CHECK_NULL);
2157 } else {
2158 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2159 }
2160 result->obj_at_put(i, m);
2161 }
2162 }
2163
2164 return (jobjectArray) JNIHandles::make_local(env, result());
2165 }
2166
2167 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2168 {
2169 JVMWrapper("JVM_GetClassDeclaredMethods");
2170 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2171 /*want_constructor*/ false,
2172 SystemDictionary::reflect_Method_klass(), THREAD);
2173 }
2174 JVM_END
2175
2176 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2177 {
2178 JVMWrapper("JVM_GetClassDeclaredConstructors");
2179 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2180 /*want_constructor*/ true,
2181 SystemDictionary::reflect_Constructor_klass(), THREAD);
2182 }
2183 JVM_END
2184
2185 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2186 {
2187 JVMWrapper("JVM_GetClassAccessFlags");
2188 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2189 // Primitive type
2190 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2191 }
2192
2193 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2194 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2195 }
2196 JVM_END
2197
2198
2199 // Constant pool access //////////////////////////////////////////////////////////
2200
2201 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2202 {
2203 JVMWrapper("JVM_GetClassConstantPool");
2204 JvmtiVMObjectAllocEventCollector oam;
2205
2206 // Return null for primitives and arrays
2207 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2208 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2209 if (k->oop_is_instance()) {
2210 instanceKlassHandle k_h(THREAD, k);
2211 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2212 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2213 return JNIHandles::make_local(jcp());
2214 }
2215 }
2216 return NULL;
2217 }
2218 JVM_END
2219
2220
2221 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2222 {
2223 JVMWrapper("JVM_ConstantPoolGetSize");
2224 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2225 return cp->length();
2226 }
2227 JVM_END
2228
2229
2230 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2231 {
2232 JVMWrapper("JVM_ConstantPoolGetClassAt");
2233 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2234 bounds_check(cp, index, CHECK_NULL);
2235 constantTag tag = cp->tag_at(index);
2236 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2237 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2238 }
2239 Klass* k = cp->klass_at(index, CHECK_NULL);
2240 return (jclass) JNIHandles::make_local(k->java_mirror());
2241 }
2242 JVM_END
2243
2244 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2245 {
2246 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2247 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2248 bounds_check(cp, index, CHECK_NULL);
2249 constantTag tag = cp->tag_at(index);
2250 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2251 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2252 }
2253 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2254 if (k == NULL) return NULL;
2255 return (jclass) JNIHandles::make_local(k->java_mirror());
2256 }
2257 JVM_END
2258
2259 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2260 constantTag tag = cp->tag_at(index);
2261 if (!tag.is_method() && !tag.is_interface_method()) {
2262 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2263 }
2264 int klass_ref = cp->uncached_klass_ref_index_at(index);
2265 Klass* k_o;
2266 if (force_resolution) {
2267 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2268 } else {
2269 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2270 if (k_o == NULL) return NULL;
2271 }
2272 instanceKlassHandle k(THREAD, k_o);
2273 Symbol* name = cp->uncached_name_ref_at(index);
2274 Symbol* sig = cp->uncached_signature_ref_at(index);
2275 methodHandle m (THREAD, k->find_method(name, sig));
2276 if (m.is_null()) {
2277 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2278 }
2279 oop method;
2280 if (!m->is_initializer() || m->is_static()) {
2281 method = Reflection::new_method(m, true, true, CHECK_NULL);
2282 } else {
2283 method = Reflection::new_constructor(m, CHECK_NULL);
2284 }
2285 return JNIHandles::make_local(method);
2286 }
2287
2288 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2289 {
2290 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2291 JvmtiVMObjectAllocEventCollector oam;
2292 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2293 bounds_check(cp, index, CHECK_NULL);
2294 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2295 return res;
2296 }
2297 JVM_END
2298
2299 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2300 {
2301 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2302 JvmtiVMObjectAllocEventCollector oam;
2303 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2304 bounds_check(cp, index, CHECK_NULL);
2305 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2306 return res;
2307 }
2308 JVM_END
2309
2310 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2311 constantTag tag = cp->tag_at(index);
2312 if (!tag.is_field()) {
2313 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2314 }
2315 int klass_ref = cp->uncached_klass_ref_index_at(index);
2316 Klass* k_o;
2317 if (force_resolution) {
2318 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2319 } else {
2320 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2321 if (k_o == NULL) return NULL;
2322 }
2323 instanceKlassHandle k(THREAD, k_o);
2324 Symbol* name = cp->uncached_name_ref_at(index);
2325 Symbol* sig = cp->uncached_signature_ref_at(index);
2326 fieldDescriptor fd;
2327 Klass* target_klass = k->find_field(name, sig, &fd);
2328 if (target_klass == NULL) {
2329 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2330 }
2331 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2332 return JNIHandles::make_local(field);
2333 }
2334
2335 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2336 {
2337 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2338 JvmtiVMObjectAllocEventCollector oam;
2339 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2340 bounds_check(cp, index, CHECK_NULL);
2341 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2342 return res;
2343 }
2344 JVM_END
2345
2346 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2347 {
2348 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2349 JvmtiVMObjectAllocEventCollector oam;
2350 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2351 bounds_check(cp, index, CHECK_NULL);
2352 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2353 return res;
2354 }
2355 JVM_END
2356
2357 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2358 {
2359 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2360 JvmtiVMObjectAllocEventCollector oam;
2361 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2362 bounds_check(cp, index, CHECK_NULL);
2363 constantTag tag = cp->tag_at(index);
2364 if (!tag.is_field_or_method()) {
2365 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2366 }
2367 int klass_ref = cp->uncached_klass_ref_index_at(index);
2368 Symbol* klass_name = cp->klass_name_at(klass_ref);
2369 Symbol* member_name = cp->uncached_name_ref_at(index);
2370 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2371 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2372 objArrayHandle dest(THREAD, dest_o);
2373 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2374 dest->obj_at_put(0, str());
2375 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2376 dest->obj_at_put(1, str());
2377 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2378 dest->obj_at_put(2, str());
2379 return (jobjectArray) JNIHandles::make_local(dest());
2380 }
2381 JVM_END
2382
2383 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2384 {
2385 JVMWrapper("JVM_ConstantPoolGetIntAt");
2386 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2387 bounds_check(cp, index, CHECK_0);
2388 constantTag tag = cp->tag_at(index);
2389 if (!tag.is_int()) {
2390 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2391 }
2392 return cp->int_at(index);
2393 }
2394 JVM_END
2395
2396 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2397 {
2398 JVMWrapper("JVM_ConstantPoolGetLongAt");
2399 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2400 bounds_check(cp, index, CHECK_(0L));
2401 constantTag tag = cp->tag_at(index);
2402 if (!tag.is_long()) {
2403 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2404 }
2405 return cp->long_at(index);
2406 }
2407 JVM_END
2408
2409 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2410 {
2411 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2412 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2413 bounds_check(cp, index, CHECK_(0.0f));
2414 constantTag tag = cp->tag_at(index);
2415 if (!tag.is_float()) {
2416 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2417 }
2418 return cp->float_at(index);
2419 }
2420 JVM_END
2421
2422 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2423 {
2424 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2425 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2426 bounds_check(cp, index, CHECK_(0.0));
2427 constantTag tag = cp->tag_at(index);
2428 if (!tag.is_double()) {
2429 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2430 }
2431 return cp->double_at(index);
2432 }
2433 JVM_END
2434
2435 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2436 {
2437 JVMWrapper("JVM_ConstantPoolGetStringAt");
2438 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2439 bounds_check(cp, index, CHECK_NULL);
2440 constantTag tag = cp->tag_at(index);
2441 if (!tag.is_string()) {
2442 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2443 }
2444 oop str = cp->string_at(index, CHECK_NULL);
2445 return (jstring) JNIHandles::make_local(str);
2446 }
2447 JVM_END
2448
2449 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2450 {
2451 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2452 JvmtiVMObjectAllocEventCollector oam;
2453 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2454 bounds_check(cp, index, CHECK_NULL);
2455 constantTag tag = cp->tag_at(index);
2456 if (!tag.is_symbol()) {
2457 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2458 }
2459 Symbol* sym = cp->symbol_at(index);
2460 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2461 return (jstring) JNIHandles::make_local(str());
2462 }
2463 JVM_END
2464
2465
2466 // Assertion support. //////////////////////////////////////////////////////////
2467
2468 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2469 JVMWrapper("JVM_DesiredAssertionStatus");
2470 assert(cls != NULL, "bad class");
2471
2472 oop r = JNIHandles::resolve(cls);
2473 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2474 if (java_lang_Class::is_primitive(r)) return false;
2475
2476 Klass* k = java_lang_Class::as_Klass(r);
2477 assert(k->oop_is_instance(), "must be an instance klass");
2478 if (! k->oop_is_instance()) return false;
2479
2480 ResourceMark rm(THREAD);
2481 const char* name = k->name()->as_C_string();
2482 bool system_class = k->class_loader() == NULL;
2483 return JavaAssertions::enabled(name, system_class);
2484
2485 JVM_END
2486
2487
2488 // Return a new AssertionStatusDirectives object with the fields filled in with
2489 // command-line assertion arguments (i.e., -ea, -da).
2490 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2491 JVMWrapper("JVM_AssertionStatusDirectives");
2492 JvmtiVMObjectAllocEventCollector oam;
2493 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2494 return JNIHandles::make_local(env, asd);
2495 JVM_END
2496
2497 // Verification ////////////////////////////////////////////////////////////////////////////////
2498
2499 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2500
2501 // RedefineClasses support: bug 6214132 caused verification to fail.
2502 // All functions from this section should call the jvmtiThreadSate function:
2503 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2504 // The function returns a Klass* of the _scratch_class if the verifier
2505 // was invoked in the middle of the class redefinition.
2506 // Otherwise it returns its argument value which is the _the_class Klass*.
2507 // Please, refer to the description in the jvmtiThreadSate.hpp.
2508
2509 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2510 JVMWrapper("JVM_GetClassNameUTF");
2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513 return k->name()->as_utf8();
2514 JVM_END
2515
2516
2517 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2518 JVMWrapper("JVM_GetClassCPTypes");
2519 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2520 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2521 // types will have length zero if this is not an InstanceKlass
2522 // (length is determined by call to JVM_GetClassCPEntriesCount)
2523 if (k->oop_is_instance()) {
2524 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2525 for (int index = cp->length() - 1; index >= 0; index--) {
2526 constantTag tag = cp->tag_at(index);
2527 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2528 }
2529 }
2530 JVM_END
2531
2532
2533 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2534 JVMWrapper("JVM_GetClassCPEntriesCount");
2535 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2536 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2537 if (!k->oop_is_instance())
2538 return 0;
2539 return InstanceKlass::cast(k)->constants()->length();
2540 JVM_END
2541
2542
2543 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2544 JVMWrapper("JVM_GetClassFieldsCount");
2545 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2546 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2547 if (!k->oop_is_instance())
2548 return 0;
2549 return InstanceKlass::cast(k)->java_fields_count();
2550 JVM_END
2551
2552
2553 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2554 JVMWrapper("JVM_GetClassMethodsCount");
2555 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2556 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2557 if (!k->oop_is_instance())
2558 return 0;
2559 return InstanceKlass::cast(k)->methods()->length();
2560 JVM_END
2561
2562
2563 // The following methods, used for the verifier, are never called with
2564 // array klasses, so a direct cast to InstanceKlass is safe.
2565 // Typically, these methods are called in a loop with bounds determined
2566 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2567 // zero for arrays.
2568 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2569 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2573 int length = method->checked_exceptions_length();
2574 if (length > 0) {
2575 CheckedExceptionElement* table= method->checked_exceptions_start();
2576 for (int i = 0; i < length; i++) {
2577 exceptions[i] = table[i].class_cp_index;
2578 }
2579 }
2580 JVM_END
2581
2582
2583 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2584 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2585 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2586 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2587 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2588 return method->checked_exceptions_length();
2589 JVM_END
2590
2591
2592 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2593 JVMWrapper("JVM_GetMethodIxByteCode");
2594 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2595 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2596 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2597 memcpy(code, method->code_base(), method->code_size());
2598 JVM_END
2599
2600
2601 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2602 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2603 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2604 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2605 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2606 return method->code_size();
2607 JVM_END
2608
2609
2610 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2611 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2612 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2613 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2614 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2615 ExceptionTable extable(method);
2616 entry->start_pc = extable.start_pc(entry_index);
2617 entry->end_pc = extable.end_pc(entry_index);
2618 entry->handler_pc = extable.handler_pc(entry_index);
2619 entry->catchType = extable.catch_type_index(entry_index);
2620 JVM_END
2621
2622
2623 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2624 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2625 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2626 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2627 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2628 return method->exception_table_length();
2629 JVM_END
2630
2631
2632 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2633 JVMWrapper("JVM_GetMethodIxModifiers");
2634 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2635 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2636 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2637 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2638 JVM_END
2639
2640
2641 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2642 JVMWrapper("JVM_GetFieldIxModifiers");
2643 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2644 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2645 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2646 JVM_END
2647
2648
2649 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2650 JVMWrapper("JVM_GetMethodIxLocalsCount");
2651 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2652 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2653 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2654 return method->max_locals();
2655 JVM_END
2656
2657
2658 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2659 JVMWrapper("JVM_GetMethodIxArgsSize");
2660 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2661 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2662 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2663 return method->size_of_parameters();
2664 JVM_END
2665
2666
2667 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2668 JVMWrapper("JVM_GetMethodIxMaxStack");
2669 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2670 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2671 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2672 return method->verifier_max_stack();
2673 JVM_END
2674
2675
2676 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2677 JVMWrapper("JVM_IsConstructorIx");
2678 ResourceMark rm(THREAD);
2679 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2680 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2681 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2682 return method->name() == vmSymbols::object_initializer_name();
2683 JVM_END
2684
2685
2686 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2687 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2688 ResourceMark rm(THREAD);
2689 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2690 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2691 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2692 return method->is_overpass();
2693 JVM_END
2694
2695 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2696 JVMWrapper("JVM_GetMethodIxIxUTF");
2697 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2698 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2699 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2700 return method->name()->as_utf8();
2701 JVM_END
2702
2703
2704 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2705 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2706 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2707 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2708 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2709 return method->signature()->as_utf8();
2710 JVM_END
2711
2712 /**
2713 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2714 * read entries in the constant pool. Since the old verifier always
2715 * works on a copy of the code, it will not see any rewriting that
2716 * may possibly occur in the middle of verification. So it is important
2717 * that nothing it calls tries to use the cpCache instead of the raw
2718 * constant pool, so we must use cp->uncached_x methods when appropriate.
2719 */
2720 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2721 JVMWrapper("JVM_GetCPFieldNameUTF");
2722 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2723 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2724 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2725 switch (cp->tag_at(cp_index).value()) {
2726 case JVM_CONSTANT_Fieldref:
2727 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2728 default:
2729 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2730 }
2731 ShouldNotReachHere();
2732 return NULL;
2733 JVM_END
2734
2735
2736 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2737 JVMWrapper("JVM_GetCPMethodNameUTF");
2738 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2739 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2740 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2741 switch (cp->tag_at(cp_index).value()) {
2742 case JVM_CONSTANT_InterfaceMethodref:
2743 case JVM_CONSTANT_Methodref:
2744 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2745 default:
2746 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2747 }
2748 ShouldNotReachHere();
2749 return NULL;
2750 JVM_END
2751
2752
2753 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2754 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2755 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2756 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2757 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2758 switch (cp->tag_at(cp_index).value()) {
2759 case JVM_CONSTANT_InterfaceMethodref:
2760 case JVM_CONSTANT_Methodref:
2761 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2762 default:
2763 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2764 }
2765 ShouldNotReachHere();
2766 return NULL;
2767 JVM_END
2768
2769
2770 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2771 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2772 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2773 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2774 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2775 switch (cp->tag_at(cp_index).value()) {
2776 case JVM_CONSTANT_Fieldref:
2777 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2778 default:
2779 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2780 }
2781 ShouldNotReachHere();
2782 return NULL;
2783 JVM_END
2784
2785
2786 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2787 JVMWrapper("JVM_GetCPClassNameUTF");
2788 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2789 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2790 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2791 Symbol* classname = cp->klass_name_at(cp_index);
2792 return classname->as_utf8();
2793 JVM_END
2794
2795
2796 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2797 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2798 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2799 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2800 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2801 switch (cp->tag_at(cp_index).value()) {
2802 case JVM_CONSTANT_Fieldref: {
2803 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2804 Symbol* classname = cp->klass_name_at(class_index);
2805 return classname->as_utf8();
2806 }
2807 default:
2808 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2809 }
2810 ShouldNotReachHere();
2811 return NULL;
2812 JVM_END
2813
2814
2815 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2816 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2817 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2818 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2819 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2820 switch (cp->tag_at(cp_index).value()) {
2821 case JVM_CONSTANT_Methodref:
2822 case JVM_CONSTANT_InterfaceMethodref: {
2823 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2824 Symbol* classname = cp->klass_name_at(class_index);
2825 return classname->as_utf8();
2826 }
2827 default:
2828 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2829 }
2830 ShouldNotReachHere();
2831 return NULL;
2832 JVM_END
2833
2834
2835 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2836 JVMWrapper("JVM_GetCPFieldModifiers");
2837 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2838 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2839 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2840 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2841 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2842 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2843 switch (cp->tag_at(cp_index).value()) {
2844 case JVM_CONSTANT_Fieldref: {
2845 Symbol* name = cp->uncached_name_ref_at(cp_index);
2846 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2847 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2848 if (fs.name() == name && fs.signature() == signature) {
2849 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2850 }
2851 }
2852 return -1;
2853 }
2854 default:
2855 fatal("JVM_GetCPFieldModifiers: illegal constant");
2856 }
2857 ShouldNotReachHere();
2858 return 0;
2859 JVM_END
2860
2861
2862 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2863 JVMWrapper("JVM_GetCPMethodModifiers");
2864 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2865 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2866 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2867 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2868 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2869 switch (cp->tag_at(cp_index).value()) {
2870 case JVM_CONSTANT_Methodref:
2871 case JVM_CONSTANT_InterfaceMethodref: {
2872 Symbol* name = cp->uncached_name_ref_at(cp_index);
2873 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2874 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2875 int methods_count = methods->length();
2876 for (int i = 0; i < methods_count; i++) {
2877 Method* method = methods->at(i);
2878 if (method->name() == name && method->signature() == signature) {
2879 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2880 }
2881 }
2882 return -1;
2883 }
2884 default:
2885 fatal("JVM_GetCPMethodModifiers: illegal constant");
2886 }
2887 ShouldNotReachHere();
2888 return 0;
2889 JVM_END
2890
2891
2892 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2893
2894 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2895 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2896 JVM_END
2897
2898
2899 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2900 JVMWrapper("JVM_IsSameClassPackage");
2901 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2902 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2903 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2904 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2905 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2906 JVM_END
2907
2908
2909 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2910
2911 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2912 JVMWrapper2("JVM_Open (%s)", fname);
2913
2914 //%note jvm_r6
2915 int result = os::open(fname, flags, mode);
2916 if (result >= 0) {
2917 return result;
2918 } else {
2919 switch(errno) {
2920 case EEXIST:
2921 return JVM_EEXIST;
2922 default:
2923 return -1;
2924 }
2925 }
2926 JVM_END
2927
2928
2929 JVM_LEAF(jint, JVM_Close(jint fd))
2930 JVMWrapper2("JVM_Close (0x%x)", fd);
2931 //%note jvm_r6
2932 return os::close(fd);
2933 JVM_END
2934
2935
2936 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2937 JVMWrapper2("JVM_Read (0x%x)", fd);
2938
2939 //%note jvm_r6
2940 return (jint)os::restartable_read(fd, buf, nbytes);
2941 JVM_END
2942
2943
2944 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2945 JVMWrapper2("JVM_Write (0x%x)", fd);
2946
2947 //%note jvm_r6
2948 return (jint)os::write(fd, buf, nbytes);
2949 JVM_END
2950
2951
2952 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2953 JVMWrapper2("JVM_Available (0x%x)", fd);
2954 //%note jvm_r6
2955 return os::available(fd, pbytes);
2956 JVM_END
2957
2958
2959 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2960 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2961 //%note jvm_r6
2962 return os::lseek(fd, offset, whence);
2963 JVM_END
2964
2965
2966 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2967 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2968 return os::ftruncate(fd, length);
2969 JVM_END
2970
2971
2972 JVM_LEAF(jint, JVM_Sync(jint fd))
2973 JVMWrapper2("JVM_Sync (0x%x)", fd);
2974 //%note jvm_r6
2975 return os::fsync(fd);
2976 JVM_END
2977
2978
2979 // Printing support //////////////////////////////////////////////////
2980 extern "C" {
2981
2982 ATTRIBUTE_PRINTF(3, 0)
2983 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2984 // Reject count values that are negative signed values converted to
2985 // unsigned; see bug 4399518, 4417214
2986 if ((intptr_t)count <= 0) return -1;
2987
2988 int result = os::vsnprintf(str, count, fmt, args);
2989 if (result > 0 && (size_t)result >= count) {
2990 result = -1;
2991 }
2992
2993 return result;
2994 }
2995
2996 ATTRIBUTE_PRINTF(3, 0)
2997 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2998 va_list args;
2999 int len;
3000 va_start(args, fmt);
3001 len = jio_vsnprintf(str, count, fmt, args);
3002 va_end(args);
3003 return len;
3004 }
3005
3006 ATTRIBUTE_PRINTF(2,3)
3007 int jio_fprintf(FILE* f, const char *fmt, ...) {
3008 int len;
3009 va_list args;
3010 va_start(args, fmt);
3011 len = jio_vfprintf(f, fmt, args);
3012 va_end(args);
3013 return len;
3014 }
3015
3016 ATTRIBUTE_PRINTF(2, 0)
3017 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
3018 if (Arguments::vfprintf_hook() != NULL) {
3019 return Arguments::vfprintf_hook()(f, fmt, args);
3020 } else {
3021 return vfprintf(f, fmt, args);
3022 }
3023 }
3024
3025 ATTRIBUTE_PRINTF(1, 2)
3026 JNIEXPORT int jio_printf(const char *fmt, ...) {
3027 int len;
3028 va_list args;
3029 va_start(args, fmt);
3030 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
3031 va_end(args);
3032 return len;
3033 }
3034
3035
3036 // HotSpot specific jio method
3037 void jio_print(const char* s) {
3038 // Try to make this function as atomic as possible.
3039 if (Arguments::vfprintf_hook() != NULL) {
3040 jio_fprintf(defaultStream::output_stream(), "%s", s);
3041 } else {
3042 // Make an unused local variable to avoid warning from gcc 4.x compiler.
3043 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
3044 }
3045 }
3046
3047 } // Extern C
3048
3049 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
3050
3051 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
3052 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
3053 // OSThread objects. The exception to this rule is when the target object is the thread
3054 // doing the operation, in which case we know that the thread won't exit until the
3055 // operation is done (all exits being voluntary). There are a few cases where it is
3056 // rather silly to do operations on yourself, like resuming yourself or asking whether
3057 // you are alive. While these can still happen, they are not subject to deadlocks if
3058 // the lock is held while the operation occurs (this is not the case for suspend, for
3059 // instance), and are very unlikely. Because IsAlive needs to be fast and its
3060 // implementation is local to this file, we always lock Threads_lock for that one.
3061
3062 static void thread_entry(JavaThread* thread, TRAPS) {
3063 HandleMark hm(THREAD);
3064 Handle obj(THREAD, thread->threadObj());
3065 JavaValue result(T_VOID);
3066 JavaCalls::call_virtual(&result,
3067 obj,
3068 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
3069 vmSymbols::run_method_name(),
3070 vmSymbols::void_method_signature(),
3071 THREAD);
3072 }
3073
3074
3075 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
3076 JVMWrapper("JVM_StartThread");
3077 JavaThread *native_thread = NULL;
3078
3079 // We cannot hold the Threads_lock when we throw an exception,
3080 // due to rank ordering issues. Example: we might need to grab the
3081 // Heap_lock while we construct the exception.
3082 bool throw_illegal_thread_state = false;
3083
3084 // We must release the Threads_lock before we can post a jvmti event
3085 // in Thread::start.
3086 {
3087 // Ensure that the C++ Thread and OSThread structures aren't freed before
3088 // we operate.
3089 MutexLocker mu(Threads_lock);
3090
3091 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
3092 // re-starting an already started thread, so we should usually find
3093 // that the JavaThread is null. However for a JNI attached thread
3094 // there is a small window between the Thread object being created
3095 // (with its JavaThread set) and the update to its threadStatus, so we
3096 // have to check for this
3097 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
3098 throw_illegal_thread_state = true;
3099 } else {
3100 // We could also check the stillborn flag to see if this thread was already stopped, but
3101 // for historical reasons we let the thread detect that itself when it starts running
3102
3103 jlong size =
3104 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
3105 // Allocate the C++ Thread structure and create the native thread. The
3106 // stack size retrieved from java is signed, but the constructor takes
3107 // size_t (an unsigned type), so avoid passing negative values which would
3108 // result in really large stacks.
3109 size_t sz = size > 0 ? (size_t) size : 0;
3110 native_thread = new JavaThread(&thread_entry, sz);
3111
3112 // At this point it may be possible that no osthread was created for the
3113 // JavaThread due to lack of memory. Check for this situation and throw
3114 // an exception if necessary. Eventually we may want to change this so
3115 // that we only grab the lock if the thread was created successfully -
3116 // then we can also do this check and throw the exception in the
3117 // JavaThread constructor.
3118 if (native_thread->osthread() != NULL) {
3119 // Note: the current thread is not being used within "prepare".
3120 native_thread->prepare(jthread);
3121 }
3122 }
3123 }
3124
3125 if (throw_illegal_thread_state) {
3126 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3127 }
3128
3129 assert(native_thread != NULL, "Starting null thread?");
3130
3131 if (native_thread->osthread() == NULL) {
3132 // No one should hold a reference to the 'native_thread'.
3133 delete native_thread;
3134 if (JvmtiExport::should_post_resource_exhausted()) {
3135 JvmtiExport::post_resource_exhausted(
3136 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3137 "unable to create new native thread");
3138 }
3139 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3140 "unable to create new native thread");
3141 }
3142
3143 Thread::start(native_thread);
3144
3145 JVM_END
3146
3147 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3148 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3149 // but is thought to be reliable and simple. In the case, where the receiver is the
3150 // same thread as the sender, no safepoint is needed.
3151 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3152 JVMWrapper("JVM_StopThread");
3153
3154 oop java_throwable = JNIHandles::resolve(throwable);
3155 if (java_throwable == NULL) {
3156 THROW(vmSymbols::java_lang_NullPointerException());
3157 }
3158 oop java_thread = JNIHandles::resolve_non_null(jthread);
3159 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3160 Events::log_exception(JavaThread::current(),
3161 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3162 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3163 // First check if thread is alive
3164 if (receiver != NULL) {
3165 // Check if exception is getting thrown at self (use oop equality, since the
3166 // target object might exit)
3167 if (java_thread == thread->threadObj()) {
3168 THROW_OOP(java_throwable);
3169 } else {
3170 // Enques a VM_Operation to stop all threads and then deliver the exception...
3171 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3172 }
3173 }
3174 else {
3175 // Either:
3176 // - target thread has not been started before being stopped, or
3177 // - target thread already terminated
3178 // We could read the threadStatus to determine which case it is
3179 // but that is overkill as it doesn't matter. We must set the
3180 // stillborn flag for the first case, and if the thread has already
3181 // exited setting this flag has no affect
3182 java_lang_Thread::set_stillborn(java_thread);
3183 }
3184 JVM_END
3185
3186
3187 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3188 JVMWrapper("JVM_IsThreadAlive");
3189
3190 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3191 return java_lang_Thread::is_alive(thread_oop);
3192 JVM_END
3193
3194
3195 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3196 JVMWrapper("JVM_SuspendThread");
3197 oop java_thread = JNIHandles::resolve_non_null(jthread);
3198 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3199
3200 if (receiver != NULL) {
3201 // thread has run and has not exited (still on threads list)
3202
3203 {
3204 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3205 if (receiver->is_external_suspend()) {
3206 // Don't allow nested external suspend requests. We can't return
3207 // an error from this interface so just ignore the problem.
3208 return;
3209 }
3210 if (receiver->is_exiting()) { // thread is in the process of exiting
3211 return;
3212 }
3213 receiver->set_external_suspend();
3214 }
3215
3216 // java_suspend() will catch threads in the process of exiting
3217 // and will ignore them.
3218 receiver->java_suspend();
3219
3220 // It would be nice to have the following assertion in all the
3221 // time, but it is possible for a racing resume request to have
3222 // resumed this thread right after we suspended it. Temporarily
3223 // enable this assertion if you are chasing a different kind of
3224 // bug.
3225 //
3226 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3227 // receiver->is_being_ext_suspended(), "thread is not suspended");
3228 }
3229 JVM_END
3230
3231
3232 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3233 JVMWrapper("JVM_ResumeThread");
3234 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3235 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3236 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3237 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3238 // looks at it.
3239 MutexLocker ml(Threads_lock);
3240 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3241 if (thr != NULL) {
3242 // the thread has run and is not in the process of exiting
3243 thr->java_resume();
3244 }
3245 JVM_END
3246
3247
3248 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3249 JVMWrapper("JVM_SetThreadPriority");
3250 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3251 MutexLocker ml(Threads_lock);
3252 oop java_thread = JNIHandles::resolve_non_null(jthread);
3253 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3254 JavaThread* thr = java_lang_Thread::thread(java_thread);
3255 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3256 Thread::set_priority(thr, (ThreadPriority)prio);
3257 }
3258 JVM_END
3259
3260
3261 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3262 JVMWrapper("JVM_Yield");
3263 if (os::dont_yield()) return;
3264 #ifndef USDT2
3265 HS_DTRACE_PROBE0(hotspot, thread__yield);
3266 #else /* USDT2 */
3267 HOTSPOT_THREAD_YIELD();
3268 #endif /* USDT2 */
3269 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3270 // Critical for similar threading behaviour
3271 if (ConvertYieldToSleep) {
3272 os::sleep(thread, MinSleepInterval, false);
3273 } else {
3274 os::yield();
3275 }
3276 JVM_END
3277
3278
3279 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3280 JVMWrapper("JVM_Sleep");
3281
3282 if (millis < 0) {
3283 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3284 }
3285
3286 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3287 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3288 }
3289
3290 // Save current thread state and restore it at the end of this block.
3291 // And set new thread state to SLEEPING.
3292 JavaThreadSleepState jtss(thread);
3293
3294 #ifndef USDT2
3295 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3296 #else /* USDT2 */
3297 HOTSPOT_THREAD_SLEEP_BEGIN(
3298 millis);
3299 #endif /* USDT2 */
3300
3301 EventThreadSleep event;
3302
3303 if (millis == 0) {
3304 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3305 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3306 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3307 // for SOLARIS
3308 if (ConvertSleepToYield) {
3309 os::yield();
3310 } else {
3311 ThreadState old_state = thread->osthread()->get_state();
3312 thread->osthread()->set_state(SLEEPING);
3313 os::sleep(thread, MinSleepInterval, false);
3314 thread->osthread()->set_state(old_state);
3315 }
3316 } else {
3317 ThreadState old_state = thread->osthread()->get_state();
3318 thread->osthread()->set_state(SLEEPING);
3319 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3320 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3321 // us while we were sleeping. We do not overwrite those.
3322 if (!HAS_PENDING_EXCEPTION) {
3323 if (event.should_commit()) {
3324 event.set_time(millis);
3325 event.commit();
3326 }
3327 #ifndef USDT2
3328 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3329 #else /* USDT2 */
3330 HOTSPOT_THREAD_SLEEP_END(
3331 1);
3332 #endif /* USDT2 */
3333 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3334 // to properly restore the thread state. That's likely wrong.
3335 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3336 }
3337 }
3338 thread->osthread()->set_state(old_state);
3339 }
3340 if (event.should_commit()) {
3341 event.set_time(millis);
3342 event.commit();
3343 }
3344 #ifndef USDT2
3345 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3346 #else /* USDT2 */
3347 HOTSPOT_THREAD_SLEEP_END(
3348 0);
3349 #endif /* USDT2 */
3350 JVM_END
3351
3352 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3353 JVMWrapper("JVM_CurrentThread");
3354 oop jthread = thread->threadObj();
3355 assert (thread != NULL, "no current thread!");
3356 return JNIHandles::make_local(env, jthread);
3357 JVM_END
3358
3359
3360 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3361 JVMWrapper("JVM_CountStackFrames");
3362
3363 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3364 oop java_thread = JNIHandles::resolve_non_null(jthread);
3365 bool throw_illegal_thread_state = false;
3366 int count = 0;
3367
3368 {
3369 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3370 // We need to re-resolve the java_thread, since a GC might have happened during the
3371 // acquire of the lock
3372 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3373
3374 if (thr == NULL) {
3375 // do nothing
3376 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3377 // Check whether this java thread has been suspended already. If not, throws
3378 // IllegalThreadStateException. We defer to throw that exception until
3379 // Threads_lock is released since loading exception class has to leave VM.
3380 // The correct way to test a thread is actually suspended is
3381 // wait_for_ext_suspend_completion(), but we can't call that while holding
3382 // the Threads_lock. The above tests are sufficient for our purposes
3383 // provided the walkability of the stack is stable - which it isn't
3384 // 100% but close enough for most practical purposes.
3385 throw_illegal_thread_state = true;
3386 } else {
3387 // Count all java activation, i.e., number of vframes
3388 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3389 // Native frames are not counted
3390 if (!vfst.method()->is_native()) count++;
3391 }
3392 }
3393 }
3394
3395 if (throw_illegal_thread_state) {
3396 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3397 "this thread is not suspended");
3398 }
3399 return count;
3400 JVM_END
3401
3402 // Consider: A better way to implement JVM_Interrupt() is to acquire
3403 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3404 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3405 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3406 // outside the critical section. Threads_lock is hot so we want to minimize
3407 // the hold-time. A cleaner interface would be to decompose interrupt into
3408 // two steps. The 1st phase, performed under Threads_lock, would return
3409 // a closure that'd be invoked after Threads_lock was dropped.
3410 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3411 // admit spurious wakeups.
3412
3413 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3414 JVMWrapper("JVM_Interrupt");
3415
3416 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3417 oop java_thread = JNIHandles::resolve_non_null(jthread);
3418 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3419 // We need to re-resolve the java_thread, since a GC might have happened during the
3420 // acquire of the lock
3421 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3422 if (thr != NULL) {
3423 Thread::interrupt(thr);
3424 }
3425 JVM_END
3426
3427
3428 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3429 JVMWrapper("JVM_IsInterrupted");
3430
3431 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3432 oop java_thread = JNIHandles::resolve_non_null(jthread);
3433 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3434 // We need to re-resolve the java_thread, since a GC might have happened during the
3435 // acquire of the lock
3436 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3437 if (thr == NULL) {
3438 return JNI_FALSE;
3439 } else {
3440 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3441 }
3442 JVM_END
3443
3444
3445 // Return true iff the current thread has locked the object passed in
3446
3447 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3448 JVMWrapper("JVM_HoldsLock");
3449 assert(THREAD->is_Java_thread(), "sanity check");
3450 if (obj == NULL) {
3451 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3452 }
3453 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3454 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3455 JVM_END
3456
3457
3458 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3459 JVMWrapper("JVM_DumpAllStacks");
3460 VM_PrintThreads op;
3461 VMThread::execute(&op);
3462 if (JvmtiExport::should_post_data_dump()) {
3463 JvmtiExport::post_data_dump();
3464 }
3465 JVM_END
3466
3467 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3468 JVMWrapper("JVM_SetNativeThreadName");
3469 ResourceMark rm(THREAD);
3470 oop java_thread = JNIHandles::resolve_non_null(jthread);
3471 JavaThread* thr = java_lang_Thread::thread(java_thread);
3472 // Thread naming only supported for the current thread, doesn't work for
3473 // target threads.
3474 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3475 // we don't set the name of an attached thread to avoid stepping
3476 // on other programs
3477 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3478 os::set_native_thread_name(thread_name);
3479 }
3480 JVM_END
3481
3482 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3483
3484 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3485 assert(jthread->is_Java_thread(), "must be a Java thread");
3486 if (jthread->privileged_stack_top() == NULL) return false;
3487 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3488 oop loader = jthread->privileged_stack_top()->class_loader();
3489 if (loader == NULL) return true;
3490 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3491 if (trusted) return true;
3492 }
3493 return false;
3494 }
3495
3496 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3497 JVMWrapper("JVM_CurrentLoadedClass");
3498 ResourceMark rm(THREAD);
3499
3500 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3501 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3502 bool trusted = is_trusted_frame(thread, &vfst);
3503 if (trusted) return NULL;
3504
3505 Method* m = vfst.method();
3506 if (!m->is_native()) {
3507 InstanceKlass* holder = m->method_holder();
3508 oop loader = holder->class_loader();
3509 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3510 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3511 }
3512 }
3513 }
3514 return NULL;
3515 JVM_END
3516
3517
3518 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3519 JVMWrapper("JVM_CurrentClassLoader");
3520 ResourceMark rm(THREAD);
3521
3522 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3523
3524 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3525 bool trusted = is_trusted_frame(thread, &vfst);
3526 if (trusted) return NULL;
3527
3528 Method* m = vfst.method();
3529 if (!m->is_native()) {
3530 InstanceKlass* holder = m->method_holder();
3531 assert(holder->is_klass(), "just checking");
3532 oop loader = holder->class_loader();
3533 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3534 return JNIHandles::make_local(env, loader);
3535 }
3536 }
3537 }
3538 return NULL;
3539 JVM_END
3540
3541
3542 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3543 JVMWrapper("JVM_GetClassContext");
3544 ResourceMark rm(THREAD);
3545 JvmtiVMObjectAllocEventCollector oam;
3546 vframeStream vfst(thread);
3547
3548 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3549 // This must only be called from SecurityManager.getClassContext
3550 Method* m = vfst.method();
3551 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3552 m->name() == vmSymbols::getClassContext_name() &&
3553 m->signature() == vmSymbols::void_class_array_signature())) {
3554 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3555 }
3556 }
3557
3558 // Collect method holders
3559 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3560 for (; !vfst.at_end(); vfst.security_next()) {
3561 Method* m = vfst.method();
3562 // Native frames are not returned
3563 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3564 Klass* holder = m->method_holder();
3565 assert(holder->is_klass(), "just checking");
3566 klass_array->append(holder);
3567 }
3568 }
3569
3570 // Create result array of type [Ljava/lang/Class;
3571 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3572 // Fill in mirrors corresponding to method holders
3573 for (int i = 0; i < klass_array->length(); i++) {
3574 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3575 }
3576
3577 return (jobjectArray) JNIHandles::make_local(env, result);
3578 JVM_END
3579
3580
3581 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3582 JVMWrapper("JVM_ClassDepth");
3583 ResourceMark rm(THREAD);
3584 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3585 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3586
3587 const char* str = java_lang_String::as_utf8_string(class_name_str());
3588 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3589 if (class_name_sym == NULL) {
3590 return -1;
3591 }
3592
3593 int depth = 0;
3594
3595 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3596 if (!vfst.method()->is_native()) {
3597 InstanceKlass* holder = vfst.method()->method_holder();
3598 assert(holder->is_klass(), "just checking");
3599 if (holder->name() == class_name_sym) {
3600 return depth;
3601 }
3602 depth++;
3603 }
3604 }
3605 return -1;
3606 JVM_END
3607
3608
3609 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3610 JVMWrapper("JVM_ClassLoaderDepth");
3611 ResourceMark rm(THREAD);
3612 int depth = 0;
3613 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3614 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3615 bool trusted = is_trusted_frame(thread, &vfst);
3616 if (trusted) return -1;
3617
3618 Method* m = vfst.method();
3619 if (!m->is_native()) {
3620 InstanceKlass* holder = m->method_holder();
3621 assert(holder->is_klass(), "just checking");
3622 oop loader = holder->class_loader();
3623 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3624 return depth;
3625 }
3626 depth++;
3627 }
3628 }
3629 return -1;
3630 JVM_END
3631
3632
3633 // java.lang.Package ////////////////////////////////////////////////////////////////
3634
3635
3636 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3637 JVMWrapper("JVM_GetSystemPackage");
3638 ResourceMark rm(THREAD);
3639 JvmtiVMObjectAllocEventCollector oam;
3640 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3641 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3642 return (jstring) JNIHandles::make_local(result);
3643 JVM_END
3644
3645
3646 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3647 JVMWrapper("JVM_GetSystemPackages");
3648 JvmtiVMObjectAllocEventCollector oam;
3649 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3650 return (jobjectArray) JNIHandles::make_local(result);
3651 JVM_END
3652
3653
3654 // ObjectInputStream ///////////////////////////////////////////////////////////////
3655
3656 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3657 if (current_class == NULL) {
3658 return true;
3659 }
3660 if ((current_class == field_class) || access.is_public()) {
3661 return true;
3662 }
3663
3664 if (access.is_protected()) {
3665 // See if current_class is a subclass of field_class
3666 if (current_class->is_subclass_of(field_class)) {
3667 return true;
3668 }
3669 }
3670
3671 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3672 }
3673
3674
3675 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3676 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3677 JVMWrapper("JVM_AllocateNewObject");
3678 JvmtiVMObjectAllocEventCollector oam;
3679 // Receiver is not used
3680 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3681 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3682
3683 // Cannot instantiate primitive types
3684 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3685 ResourceMark rm(THREAD);
3686 THROW_0(vmSymbols::java_lang_InvalidClassException());
3687 }
3688
3689 // Arrays not allowed here, must use JVM_AllocateNewArray
3690 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3691 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3692 ResourceMark rm(THREAD);
3693 THROW_0(vmSymbols::java_lang_InvalidClassException());
3694 }
3695
3696 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3697 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3698
3699 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3700
3701 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3702 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3703
3704 // Make sure klass is initialized, since we are about to instantiate one of them.
3705 curr_klass->initialize(CHECK_NULL);
3706
3707 methodHandle m (THREAD,
3708 init_klass->find_method(vmSymbols::object_initializer_name(),
3709 vmSymbols::void_method_signature()));
3710 if (m.is_null()) {
3711 ResourceMark rm(THREAD);
3712 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3713 Method::name_and_sig_as_C_string(init_klass(),
3714 vmSymbols::object_initializer_name(),
3715 vmSymbols::void_method_signature()));
3716 }
3717
3718 if (curr_klass == init_klass && !m->is_public()) {
3719 // Calling the constructor for class 'curr_klass'.
3720 // Only allow calls to a public no-arg constructor.
3721 // This path corresponds to creating an Externalizable object.
3722 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3723 }
3724
3725 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3726 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3727 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3728 }
3729
3730 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3731 // Call constructor m. This might call a constructor higher up in the hierachy
3732 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3733
3734 return JNIHandles::make_local(obj());
3735 JVM_END
3736
3737
3738 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3739 JVMWrapper("JVM_AllocateNewArray");
3740 JvmtiVMObjectAllocEventCollector oam;
3741 oop mirror = JNIHandles::resolve_non_null(currClass);
3742
3743 if (java_lang_Class::is_primitive(mirror)) {
3744 THROW_0(vmSymbols::java_lang_InvalidClassException());
3745 }
3746 Klass* k = java_lang_Class::as_Klass(mirror);
3747 oop result;
3748
3749 if (k->oop_is_typeArray()) {
3750 // typeArray
3751 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3752 } else if (k->oop_is_objArray()) {
3753 // objArray
3754 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3755 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3756 result = oak->allocate(length, CHECK_NULL);
3757 } else {
3758 THROW_0(vmSymbols::java_lang_InvalidClassException());
3759 }
3760 return JNIHandles::make_local(env, result);
3761 JVM_END
3762
3763
3764 // Returns first non-privileged class loader on the stack (excluding reflection
3765 // generated frames) or null if only classes loaded by the boot class loader
3766 // and extension class loader are found on the stack.
3767
3768 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3769 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3770 // UseNewReflection
3771 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3772 oop loader = vfst.method()->method_holder()->class_loader();
3773 if (loader != NULL && !SystemDictionary::is_ext_class_loader(loader)) {
3774 return JNIHandles::make_local(env, loader);
3775 }
3776 }
3777 return NULL;
3778 JVM_END
3779
3780
3781 // Load a class relative to the most recent class on the stack with a non-null
3782 // classloader.
3783 // This function has been deprecated and should not be considered part of the
3784 // specified JVM interface.
3785
3786 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3787 jclass currClass, jstring currClassName))
3788 JVMWrapper("JVM_LoadClass0");
3789 // Receiver is not used
3790 ResourceMark rm(THREAD);
3791
3792 // Class name argument is not guaranteed to be in internal format
3793 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3794 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3795
3796 const char* str = java_lang_String::as_utf8_string(string());
3797
3798 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3799 // It's impossible to create this class; the name cannot fit
3800 // into the constant pool.
3801 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3802 }
3803
3804 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3805 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3806 // Find the most recent class on the stack with a non-null classloader
3807 oop loader = NULL;
3808 oop protection_domain = NULL;
3809 if (curr_klass.is_null()) {
3810 for (vframeStream vfst(thread);
3811 !vfst.at_end() && loader == NULL;
3812 vfst.next()) {
3813 if (!vfst.method()->is_native()) {
3814 InstanceKlass* holder = vfst.method()->method_holder();
3815 loader = holder->class_loader();
3816 protection_domain = holder->protection_domain();
3817 }
3818 }
3819 } else {
3820 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3821 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3822 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3823 }
3824 Handle h_loader(THREAD, loader);
3825 Handle h_prot (THREAD, protection_domain);
3826 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3827 false, thread);
3828 if (TraceClassResolution && result != NULL) {
3829 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3830 }
3831 return result;
3832 JVM_END
3833
3834
3835 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3836
3837
3838 // resolve array handle and check arguments
3839 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3840 if (arr == NULL) {
3841 THROW_0(vmSymbols::java_lang_NullPointerException());
3842 }
3843 oop a = JNIHandles::resolve_non_null(arr);
3844 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3845 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3846 }
3847 return arrayOop(a);
3848 }
3849
3850
3851 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3852 JVMWrapper("JVM_GetArrayLength");
3853 arrayOop a = check_array(env, arr, false, CHECK_0);
3854 return a->length();
3855 JVM_END
3856
3857
3858 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3859 JVMWrapper("JVM_Array_Get");
3860 JvmtiVMObjectAllocEventCollector oam;
3861 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3862 jvalue value;
3863 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3864 oop box = Reflection::box(&value, type, CHECK_NULL);
3865 return JNIHandles::make_local(env, box);
3866 JVM_END
3867
3868
3869 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3870 JVMWrapper("JVM_GetPrimitiveArrayElement");
3871 jvalue value;
3872 value.i = 0; // to initialize value before getting used in CHECK
3873 arrayOop a = check_array(env, arr, true, CHECK_(value));
3874 assert(a->is_typeArray(), "just checking");
3875 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3876 BasicType wide_type = (BasicType) wCode;
3877 if (type != wide_type) {
3878 Reflection::widen(&value, type, wide_type, CHECK_(value));
3879 }
3880 return value;
3881 JVM_END
3882
3883
3884 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3885 JVMWrapper("JVM_SetArrayElement");
3886 arrayOop a = check_array(env, arr, false, CHECK);
3887 oop box = JNIHandles::resolve(val);
3888 jvalue value;
3889 value.i = 0; // to initialize value before getting used in CHECK
3890 BasicType value_type;
3891 if (a->is_objArray()) {
3892 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3893 value_type = Reflection::unbox_for_regular_object(box, &value);
3894 } else {
3895 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3896 }
3897 Reflection::array_set(&value, a, index, value_type, CHECK);
3898 JVM_END
3899
3900
3901 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3902 JVMWrapper("JVM_SetPrimitiveArrayElement");
3903 arrayOop a = check_array(env, arr, true, CHECK);
3904 assert(a->is_typeArray(), "just checking");
3905 BasicType value_type = (BasicType) vCode;
3906 Reflection::array_set(&v, a, index, value_type, CHECK);
3907 JVM_END
3908
3909
3910 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3911 JVMWrapper("JVM_NewArray");
3912 JvmtiVMObjectAllocEventCollector oam;
3913 oop element_mirror = JNIHandles::resolve(eltClass);
3914 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3915 return JNIHandles::make_local(env, result);
3916 JVM_END
3917
3918
3919 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3920 JVMWrapper("JVM_NewMultiArray");
3921 JvmtiVMObjectAllocEventCollector oam;
3922 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3923 oop element_mirror = JNIHandles::resolve(eltClass);
3924 assert(dim_array->is_typeArray(), "just checking");
3925 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3926 return JNIHandles::make_local(env, result);
3927 JVM_END
3928
3929
3930 // Networking library support ////////////////////////////////////////////////////////////////////
3931
3932 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3933 JVMWrapper("JVM_InitializeSocketLibrary");
3934 return 0;
3935 JVM_END
3936
3937
3938 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3939 JVMWrapper("JVM_Socket");
3940 return os::socket(domain, type, protocol);
3941 JVM_END
3942
3943
3944 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3945 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3946 //%note jvm_r6
3947 return os::socket_close(fd);
3948 JVM_END
3949
3950
3951 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3952 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3953 //%note jvm_r6
3954 return os::socket_shutdown(fd, howto);
3955 JVM_END
3956
3957
3958 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3959 JVMWrapper2("JVM_Recv (0x%x)", fd);
3960 //%note jvm_r6
3961 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3962 JVM_END
3963
3964
3965 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3966 JVMWrapper2("JVM_Send (0x%x)", fd);
3967 //%note jvm_r6
3968 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3969 JVM_END
3970
3971
3972 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3973 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3974 //%note jvm_r6
3975 return os::timeout(fd, timeout);
3976 JVM_END
3977
3978
3979 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3980 JVMWrapper2("JVM_Listen (0x%x)", fd);
3981 //%note jvm_r6
3982 return os::listen(fd, count);
3983 JVM_END
3984
3985
3986 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3987 JVMWrapper2("JVM_Connect (0x%x)", fd);
3988 //%note jvm_r6
3989 return os::connect(fd, him, (socklen_t)len);
3990 JVM_END
3991
3992
3993 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3994 JVMWrapper2("JVM_Bind (0x%x)", fd);
3995 //%note jvm_r6
3996 return os::bind(fd, him, (socklen_t)len);
3997 JVM_END
3998
3999
4000 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
4001 JVMWrapper2("JVM_Accept (0x%x)", fd);
4002 //%note jvm_r6
4003 socklen_t socklen = (socklen_t)(*len);
4004 jint result = os::accept(fd, him, &socklen);
4005 *len = (jint)socklen;
4006 return result;
4007 JVM_END
4008
4009
4010 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
4011 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
4012 //%note jvm_r6
4013 socklen_t socklen = (socklen_t)(*fromlen);
4014 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
4015 *fromlen = (int)socklen;
4016 return result;
4017 JVM_END
4018
4019
4020 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
4021 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
4022 //%note jvm_r6
4023 socklen_t socklen = (socklen_t)(*len);
4024 jint result = os::get_sock_name(fd, him, &socklen);
4025 *len = (int)socklen;
4026 return result;
4027 JVM_END
4028
4029
4030 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
4031 JVMWrapper2("JVM_SendTo (0x%x)", fd);
4032 //%note jvm_r6
4033 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
4034 JVM_END
4035
4036
4037 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
4038 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
4039 //%note jvm_r6
4040 return os::socket_available(fd, pbytes);
4041 JVM_END
4042
4043
4044 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
4045 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4046 //%note jvm_r6
4047 socklen_t socklen = (socklen_t)(*optlen);
4048 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
4049 *optlen = (int)socklen;
4050 return result;
4051 JVM_END
4052
4053
4054 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
4055 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4056 //%note jvm_r6
4057 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
4058 JVM_END
4059
4060
4061 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
4062 JVMWrapper("JVM_GetHostName");
4063 return os::get_host_name(name, namelen);
4064 JVM_END
4065
4066
4067 // Library support ///////////////////////////////////////////////////////////////////////////
4068
4069 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
4070 //%note jvm_ct
4071 JVMWrapper2("JVM_LoadLibrary (%s)", name);
4072 char ebuf[1024];
4073 void *load_result;
4074 {
4075 ThreadToNativeFromVM ttnfvm(thread);
4076 load_result = os::dll_load(name, ebuf, sizeof ebuf);
4077 }
4078 if (load_result == NULL) {
4079 char msg[1024];
4080 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
4081 // Since 'ebuf' may contain a string encoded using
4082 // platform encoding scheme, we need to pass
4083 // Exceptions::unsafe_to_utf8 to the new_exception method
4084 // as the last argument. See bug 6367357.
4085 Handle h_exception =
4086 Exceptions::new_exception(thread,
4087 vmSymbols::java_lang_UnsatisfiedLinkError(),
4088 msg, Exceptions::unsafe_to_utf8);
4089
4090 THROW_HANDLE_0(h_exception);
4091 }
4092 return load_result;
4093 JVM_END
4094
4095
4096 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
4097 JVMWrapper("JVM_UnloadLibrary");
4098 os::dll_unload(handle);
4099 JVM_END
4100
4101
4102 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
4103 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
4104 return os::dll_lookup(handle, name);
4105 JVM_END
4106
4107
4108 // Floating point support ////////////////////////////////////////////////////////////////////
4109
4110 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
4111 JVMWrapper("JVM_IsNaN");
4112 return g_isnan(a);
4113 JVM_END
4114
4115
4116 // JNI version ///////////////////////////////////////////////////////////////////////////////
4117
4118 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
4119 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
4120 return Threads::is_supported_jni_version_including_1_1(version);
4121 JVM_END
4122
4123
4124 // String support ///////////////////////////////////////////////////////////////////////////
4125
4126 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4127 JVMWrapper("JVM_InternString");
4128 JvmtiVMObjectAllocEventCollector oam;
4129 if (str == NULL) return NULL;
4130 oop string = JNIHandles::resolve_non_null(str);
4131 oop result = StringTable::intern(string, CHECK_NULL);
4132 return (jstring) JNIHandles::make_local(env, result);
4133 JVM_END
4134
4135
4136 // Raw monitor support //////////////////////////////////////////////////////////////////////
4137
4138 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4139 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4140 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4141 // that only works with java threads.
4142
4143
4144 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4145 VM_Exit::block_if_vm_exited();
4146 JVMWrapper("JVM_RawMonitorCreate");
4147 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4148 }
4149
4150
4151 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4152 VM_Exit::block_if_vm_exited();
4153 JVMWrapper("JVM_RawMonitorDestroy");
4154 delete ((Mutex*) mon);
4155 }
4156
4157
4158 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4159 VM_Exit::block_if_vm_exited();
4160 JVMWrapper("JVM_RawMonitorEnter");
4161 ((Mutex*) mon)->jvm_raw_lock();
4162 return 0;
4163 }
4164
4165
4166 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4167 VM_Exit::block_if_vm_exited();
4168 JVMWrapper("JVM_RawMonitorExit");
4169 ((Mutex*) mon)->jvm_raw_unlock();
4170 }
4171
4172
4173 // Support for Serialization
4174
4175 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4176 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4177 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4178 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4179
4180 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4181 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4182 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4183 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4184
4185
4186 void initialize_converter_functions() {
4187 if (JDK_Version::is_gte_jdk14x_version()) {
4188 // These functions only exist for compatibility with 1.3.1 and earlier
4189 return;
4190 }
4191
4192 // called from universe_post_init()
4193 assert(
4194 int_bits_to_float_fn == NULL &&
4195 long_bits_to_double_fn == NULL &&
4196 float_to_int_bits_fn == NULL &&
4197 double_to_long_bits_fn == NULL ,
4198 "initialization done twice"
4199 );
4200 // initialize
4201 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4202 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4203 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4204 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4205 // verify
4206 assert(
4207 int_bits_to_float_fn != NULL &&
4208 long_bits_to_double_fn != NULL &&
4209 float_to_int_bits_fn != NULL &&
4210 double_to_long_bits_fn != NULL ,
4211 "initialization failed"
4212 );
4213 }
4214
4215
4216
4217 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4218
4219 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4220 Handle loader, Handle protection_domain,
4221 jboolean throwError, TRAPS) {
4222 // Security Note:
4223 // The Java level wrapper will perform the necessary security check allowing
4224 // us to pass the NULL as the initiating class loader. The VM is responsible for
4225 // the checkPackageAccess relative to the initiating class loader via the
4226 // protection_domain. The protection_domain is passed as NULL by the java code
4227 // if there is no security manager in 3-arg Class.forName().
4228 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4229
4230 KlassHandle klass_handle(THREAD, klass);
4231 // Check if we should initialize the class
4232 if (init && klass_handle->oop_is_instance()) {
4233 klass_handle->initialize(CHECK_NULL);
4234 }
4235 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4236 }
4237
4238
4239 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4240
4241 #ifndef PRODUCT
4242
4243 extern "C" {
4244 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4245 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4246 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4247 }
4248
4249 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4250 JVMWrapper("JVM_AccessBoolVMFlag");
4251 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4252 JVM_END
4253
4254 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4255 JVMWrapper("JVM_AccessVMIntFlag");
4256 intx v;
4257 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4258 *value = (jint)v;
4259 return result;
4260 JVM_END
4261
4262
4263 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4264 JVMWrapper("JVM_VMBreakPoint");
4265 oop the_obj = JNIHandles::resolve(obj);
4266 BREAKPOINT;
4267 JVM_END
4268
4269
4270 #endif
4271
4272
4273 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4274
4275 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4276 JVMWrapper("JVM_InvokeMethod");
4277 Handle method_handle;
4278 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4279 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4280 Handle receiver(THREAD, JNIHandles::resolve(obj));
4281 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4282 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4283 jobject res = JNIHandles::make_local(env, result);
4284 if (JvmtiExport::should_post_vm_object_alloc()) {
4285 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4286 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4287 if (java_lang_Class::is_primitive(ret_type)) {
4288 // Only for primitive type vm allocates memory for java object.
4289 // See box() method.
4290 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4291 }
4292 }
4293 return res;
4294 } else {
4295 THROW_0(vmSymbols::java_lang_StackOverflowError());
4296 }
4297 JVM_END
4298
4299
4300 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4301 JVMWrapper("JVM_NewInstanceFromConstructor");
4302 oop constructor_mirror = JNIHandles::resolve(c);
4303 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4304 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4305 jobject res = JNIHandles::make_local(env, result);
4306 if (JvmtiExport::should_post_vm_object_alloc()) {
4307 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4308 }
4309 return res;
4310 JVM_END
4311
4312 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4313
4314 JVM_LEAF(jboolean, JVM_SupportsCX8())
4315 JVMWrapper("JVM_SupportsCX8");
4316 return VM_Version::supports_cx8();
4317 JVM_END
4318
4319
4320 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4321 JVMWrapper("JVM_CX8Field");
4322 jlong res;
4323 oop o = JNIHandles::resolve(obj);
4324 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4325 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4326
4327 assert(VM_Version::supports_cx8(), "cx8 not supported");
4328 res = Atomic::cmpxchg(newVal, addr, oldVal);
4329
4330 return res == oldVal;
4331 JVM_END
4332
4333 // DTrace ///////////////////////////////////////////////////////////////////
4334
4335 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4336 JVMWrapper("JVM_DTraceGetVersion");
4337 return (jint)JVM_TRACING_DTRACE_VERSION;
4338 JVM_END
4339
4340 JVM_ENTRY(jlong,JVM_DTraceActivate(
4341 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4342 JVM_DTraceProvider* providers))
4343 JVMWrapper("JVM_DTraceActivate");
4344 return DTraceJSDT::activate(
4345 version, module_name, providers_count, providers, CHECK_0);
4346 JVM_END
4347
4348 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4349 JVMWrapper("JVM_DTraceIsProbeEnabled");
4350 return DTraceJSDT::is_probe_enabled(method);
4351 JVM_END
4352
4353 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4354 JVMWrapper("JVM_DTraceDispose");
4355 DTraceJSDT::dispose(handle);
4356 JVM_END
4357
4358 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4359 JVMWrapper("JVM_DTraceIsSupported");
4360 return DTraceJSDT::is_supported();
4361 JVM_END
4362
4363 // Returns an array of all live Thread objects (VM internal JavaThreads,
4364 // jvmti agent threads, and JNI attaching threads are skipped)
4365 // See CR 6404306 regarding JNI attaching threads
4366 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4367 ResourceMark rm(THREAD);
4368 ThreadsListEnumerator tle(THREAD, false, false);
4369 JvmtiVMObjectAllocEventCollector oam;
4370
4371 int num_threads = tle.num_threads();
4372 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4373 objArrayHandle threads_ah(THREAD, r);
4374
4375 for (int i = 0; i < num_threads; i++) {
4376 Handle h = tle.get_threadObj(i);
4377 threads_ah->obj_at_put(i, h());
4378 }
4379
4380 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4381 JVM_END
4382
4383
4384 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4385 // Return StackTraceElement[][], each element is the stack trace of a thread in
4386 // the corresponding entry in the given threads array
4387 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4388 JVMWrapper("JVM_DumpThreads");
4389 JvmtiVMObjectAllocEventCollector oam;
4390
4391 // Check if threads is null
4392 if (threads == NULL) {
4393 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4394 }
4395
4396 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4397 objArrayHandle ah(THREAD, a);
4398 int num_threads = ah->length();
4399 // check if threads is non-empty array
4400 if (num_threads == 0) {
4401 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4402 }
4403
4404 // check if threads is not an array of objects of Thread class
4405 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4406 if (k != SystemDictionary::Thread_klass()) {
4407 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4408 }
4409
4410 ResourceMark rm(THREAD);
4411
4412 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4413 for (int i = 0; i < num_threads; i++) {
4414 oop thread_obj = ah->obj_at(i);
4415 instanceHandle h(THREAD, (instanceOop) thread_obj);
4416 thread_handle_array->append(h);
4417 }
4418
4419 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4420 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4421
4422 JVM_END
4423
4424 // JVM monitoring and management support
4425 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4426 return Management::get_jmm_interface(version);
4427 JVM_END
4428
4429 // com.sun.tools.attach.VirtualMachine agent properties support
4430 //
4431 // Initialize the agent properties with the properties maintained in the VM
4432 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4433 JVMWrapper("JVM_InitAgentProperties");
4434 ResourceMark rm;
4435
4436 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4437
4438 PUTPROP(props, "sun.java.command", Arguments::java_command());
4439 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4440 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4441 return properties;
4442 JVM_END
4443
4444 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4445 {
4446 JVMWrapper("JVM_GetEnclosingMethodInfo");
4447 JvmtiVMObjectAllocEventCollector oam;
4448
4449 if (ofClass == NULL) {
4450 return NULL;
4451 }
4452 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4453 // Special handling for primitive objects
4454 if (java_lang_Class::is_primitive(mirror())) {
4455 return NULL;
4456 }
4457 Klass* k = java_lang_Class::as_Klass(mirror());
4458 if (!k->oop_is_instance()) {
4459 return NULL;
4460 }
4461 instanceKlassHandle ik_h(THREAD, k);
4462 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4463 if (encl_method_class_idx == 0) {
4464 return NULL;
4465 }
4466 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4467 objArrayHandle dest(THREAD, dest_o);
4468 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4469 dest->obj_at_put(0, enc_k->java_mirror());
4470 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4471 if (encl_method_method_idx != 0) {
4472 Symbol* sym = ik_h->constants()->symbol_at(
4473 extract_low_short_from_int(
4474 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4475 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4476 dest->obj_at_put(1, str());
4477 sym = ik_h->constants()->symbol_at(
4478 extract_high_short_from_int(
4479 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4480 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4481 dest->obj_at_put(2, str());
4482 }
4483 return (jobjectArray) JNIHandles::make_local(dest());
4484 }
4485 JVM_END
4486
4487 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4488 jint javaThreadState))
4489 {
4490 // If new thread states are added in future JDK and VM versions,
4491 // this should check if the JDK version is compatible with thread
4492 // states supported by the VM. Return NULL if not compatible.
4493 //
4494 // This function must map the VM java_lang_Thread::ThreadStatus
4495 // to the Java thread state that the JDK supports.
4496 //
4497
4498 typeArrayHandle values_h;
4499 switch (javaThreadState) {
4500 case JAVA_THREAD_STATE_NEW : {
4501 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4502 values_h = typeArrayHandle(THREAD, r);
4503 values_h->int_at_put(0, java_lang_Thread::NEW);
4504 break;
4505 }
4506 case JAVA_THREAD_STATE_RUNNABLE : {
4507 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4508 values_h = typeArrayHandle(THREAD, r);
4509 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4510 break;
4511 }
4512 case JAVA_THREAD_STATE_BLOCKED : {
4513 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4514 values_h = typeArrayHandle(THREAD, r);
4515 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4516 break;
4517 }
4518 case JAVA_THREAD_STATE_WAITING : {
4519 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4520 values_h = typeArrayHandle(THREAD, r);
4521 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4522 values_h->int_at_put(1, java_lang_Thread::PARKED);
4523 break;
4524 }
4525 case JAVA_THREAD_STATE_TIMED_WAITING : {
4526 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4527 values_h = typeArrayHandle(THREAD, r);
4528 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4529 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4530 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4531 break;
4532 }
4533 case JAVA_THREAD_STATE_TERMINATED : {
4534 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4535 values_h = typeArrayHandle(THREAD, r);
4536 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4537 break;
4538 }
4539 default:
4540 // Unknown state - probably incompatible JDK version
4541 return NULL;
4542 }
4543
4544 return (jintArray) JNIHandles::make_local(env, values_h());
4545 }
4546 JVM_END
4547
4548
4549 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4550 jint javaThreadState,
4551 jintArray values))
4552 {
4553 // If new thread states are added in future JDK and VM versions,
4554 // this should check if the JDK version is compatible with thread
4555 // states supported by the VM. Return NULL if not compatible.
4556 //
4557 // This function must map the VM java_lang_Thread::ThreadStatus
4558 // to the Java thread state that the JDK supports.
4559 //
4560
4561 ResourceMark rm;
4562
4563 // Check if threads is null
4564 if (values == NULL) {
4565 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4566 }
4567
4568 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4569 typeArrayHandle values_h(THREAD, v);
4570
4571 objArrayHandle names_h;
4572 switch (javaThreadState) {
4573 case JAVA_THREAD_STATE_NEW : {
4574 assert(values_h->length() == 1 &&
4575 values_h->int_at(0) == java_lang_Thread::NEW,
4576 "Invalid threadStatus value");
4577
4578 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4579 1, /* only 1 substate */
4580 CHECK_NULL);
4581 names_h = objArrayHandle(THREAD, r);
4582 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4583 names_h->obj_at_put(0, name());
4584 break;
4585 }
4586 case JAVA_THREAD_STATE_RUNNABLE : {
4587 assert(values_h->length() == 1 &&
4588 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4589 "Invalid threadStatus value");
4590
4591 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4592 1, /* only 1 substate */
4593 CHECK_NULL);
4594 names_h = objArrayHandle(THREAD, r);
4595 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4596 names_h->obj_at_put(0, name());
4597 break;
4598 }
4599 case JAVA_THREAD_STATE_BLOCKED : {
4600 assert(values_h->length() == 1 &&
4601 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4602 "Invalid threadStatus value");
4603
4604 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4605 1, /* only 1 substate */
4606 CHECK_NULL);
4607 names_h = objArrayHandle(THREAD, r);
4608 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4609 names_h->obj_at_put(0, name());
4610 break;
4611 }
4612 case JAVA_THREAD_STATE_WAITING : {
4613 assert(values_h->length() == 2 &&
4614 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4615 values_h->int_at(1) == java_lang_Thread::PARKED,
4616 "Invalid threadStatus value");
4617 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4618 2, /* number of substates */
4619 CHECK_NULL);
4620 names_h = objArrayHandle(THREAD, r);
4621 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4622 CHECK_NULL);
4623 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4624 CHECK_NULL);
4625 names_h->obj_at_put(0, name0());
4626 names_h->obj_at_put(1, name1());
4627 break;
4628 }
4629 case JAVA_THREAD_STATE_TIMED_WAITING : {
4630 assert(values_h->length() == 3 &&
4631 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4632 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4633 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4634 "Invalid threadStatus value");
4635 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4636 3, /* number of substates */
4637 CHECK_NULL);
4638 names_h = objArrayHandle(THREAD, r);
4639 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4640 CHECK_NULL);
4641 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4642 CHECK_NULL);
4643 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4644 CHECK_NULL);
4645 names_h->obj_at_put(0, name0());
4646 names_h->obj_at_put(1, name1());
4647 names_h->obj_at_put(2, name2());
4648 break;
4649 }
4650 case JAVA_THREAD_STATE_TERMINATED : {
4651 assert(values_h->length() == 1 &&
4652 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4653 "Invalid threadStatus value");
4654 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4655 1, /* only 1 substate */
4656 CHECK_NULL);
4657 names_h = objArrayHandle(THREAD, r);
4658 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4659 names_h->obj_at_put(0, name());
4660 break;
4661 }
4662 default:
4663 // Unknown state - probably incompatible JDK version
4664 return NULL;
4665 }
4666 return (jobjectArray) JNIHandles::make_local(env, names_h());
4667 }
4668 JVM_END
4669
4670 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4671 {
4672 memset(info, 0, info_size);
4673
4674 info->jvm_version = Abstract_VM_Version::jvm_version();
4675 info->update_version = 0; /* 0 in HotSpot Express VM */
4676 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4677
4678 // when we add a new capability in the jvm_version_info struct, we should also
4679 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4680 // counter defined in runtimeService.cpp.
4681 info->is_attachable = AttachListener::is_attach_supported();
4682 }
4683 JVM_END