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