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/macros.hpp"
77 #include "utilities/top.hpp"
78 #include "utilities/utf8.hpp"
79 #ifdef TARGET_OS_FAMILY_linux
80 # include "jvm_linux.h"
81 #endif
82 #ifdef TARGET_OS_FAMILY_solaris
83 # include "jvm_solaris.h"
84 #endif
85 #ifdef TARGET_OS_FAMILY_windows
86 # include "jvm_windows.h"
87 #endif
88 #ifdef TARGET_OS_FAMILY_aix
89 # include "jvm_aix.h"
90 #endif
91 #ifdef TARGET_OS_FAMILY_bsd
92 # include "jvm_bsd.h"
93 #endif
94
95 #if INCLUDE_ALL_GCS
96 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
97 #include "gc_implementation/shenandoah/shenandoahBarrierSetClone.inline.hpp"
98 #endif // INCLUDE_ALL_GCS
99
100 #include <errno.h>
101
102 #ifndef USDT2
103 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
104 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
105 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
106 #endif /* !USDT2 */
107
108 /*
109 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
110 such ctors and calls MUST NOT come between an oop declaration/init and its
111 usage because if objects are move this may cause various memory stomps, bus
112 errors and segfaults. Here is a cookbook for causing so called "naked oop
113 failures":
114
115 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
116 JVMWrapper("JVM_GetClassDeclaredFields");
117
118 // Object address to be held directly in mirror & not visible to GC
119 oop mirror = JNIHandles::resolve_non_null(ofClass);
120
121 // If this ctor can hit a safepoint, moving objects around, then
122 ComplexConstructor foo;
123
124 // Boom! mirror may point to JUNK instead of the intended object
125 (some dereference of mirror)
126
127 // Here's another call that may block for GC, making mirror stale
128 MutexLocker ml(some_lock);
129
130 // And here's an initializer that can result in a stale oop
131 // all in one step.
132 oop o = call_that_can_throw_exception(TRAPS);
133
134
135 The solution is to keep the oop declaration BELOW the ctor or function
136 call that might cause a GC, do another resolve to reassign the oop, or
137 consider use of a Handle instead of an oop so there is immunity from object
138 motion. But note that the "QUICK" entries below do not have a handlemark
139 and thus can only support use of handles passed in.
140 */
141
142 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
143 ResourceMark rm;
144 int line_number = -1;
145 const char * source_file = NULL;
146 const char * trace = "explicit";
147 InstanceKlass* caller = NULL;
148 JavaThread* jthread = JavaThread::current();
149 if (jthread->has_last_Java_frame()) {
150 vframeStream vfst(jthread);
151
152 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
153 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
154 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
155 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
156 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
157
158 Method* last_caller = NULL;
159
160 while (!vfst.at_end()) {
161 Method* m = vfst.method();
162 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
163 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
164 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
165 break;
166 }
167 last_caller = m;
168 vfst.next();
169 }
170 // if this is called from Class.forName0 and that is called from Class.forName,
171 // then print the caller of Class.forName. If this is Class.loadClass, then print
172 // that caller, otherwise keep quiet since this should be picked up elsewhere.
173 bool found_it = false;
174 if (!vfst.at_end() &&
175 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
176 vfst.method()->name() == vmSymbols::forName0_name()) {
177 vfst.next();
178 if (!vfst.at_end() &&
179 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
180 vfst.method()->name() == vmSymbols::forName_name()) {
181 vfst.next();
182 found_it = true;
183 }
184 } else if (last_caller != NULL &&
185 last_caller->method_holder()->name() ==
186 vmSymbols::java_lang_ClassLoader() &&
187 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
188 last_caller->name() == vmSymbols::loadClass_name())) {
189 found_it = true;
190 } else if (!vfst.at_end()) {
191 if (vfst.method()->is_native()) {
192 // JNI call
193 found_it = true;
194 }
195 }
196 if (found_it && !vfst.at_end()) {
197 // found the caller
198 caller = vfst.method()->method_holder();
199 line_number = vfst.method()->line_number_from_bci(vfst.bci());
200 if (line_number == -1) {
201 // show method name if it's a native method
202 trace = vfst.method()->name_and_sig_as_C_string();
203 }
204 Symbol* s = caller->source_file_name();
205 if (s != NULL) {
206 source_file = s->as_C_string();
207 }
208 }
209 }
210 if (caller != NULL) {
211 if (to_class != caller) {
212 const char * from = caller->external_name();
213 const char * to = to_class->external_name();
214 // print in a single call to reduce interleaving between threads
215 if (source_file != NULL) {
216 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
217 } else {
218 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
219 }
220 }
221 }
222 }
223
224 void trace_class_resolution(Klass* to_class) {
225 EXCEPTION_MARK;
226 trace_class_resolution_impl(to_class, THREAD);
227 if (HAS_PENDING_EXCEPTION) {
228 CLEAR_PENDING_EXCEPTION;
229 }
230 }
231
232 // Wrapper to trace JVM functions
233
234 #ifdef ASSERT
235 class JVMTraceWrapper : public StackObj {
236 public:
237 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
238 if (TraceJVMCalls) {
239 va_list ap;
240 va_start(ap, format);
241 tty->print("JVM ");
242 tty->vprint_cr(format, ap);
243 va_end(ap);
244 }
245 }
246 };
247
248 Histogram* JVMHistogram;
249 volatile jint JVMHistogram_lock = 0;
250
251 class JVMHistogramElement : public HistogramElement {
252 public:
253 JVMHistogramElement(const char* name);
254 };
255
256 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
257 _name = elementName;
258 uintx count = 0;
259
260 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
261 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
262 count +=1;
263 if ( (WarnOnStalledSpinLock > 0)
264 && (count % WarnOnStalledSpinLock == 0)) {
265 warning("JVMHistogram_lock seems to be stalled");
266 }
267 }
268 }
269
270 if(JVMHistogram == NULL)
271 JVMHistogram = new Histogram("JVM Call Counts",100);
272
273 JVMHistogram->add_element(this);
274 Atomic::dec(&JVMHistogram_lock);
275 }
276
277 #define JVMCountWrapper(arg) \
278 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
279 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
280
281 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
282 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
283 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
284 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
285 #else
286 #define JVMWrapper(arg1)
287 #define JVMWrapper2(arg1, arg2)
288 #define JVMWrapper3(arg1, arg2, arg3)
289 #define JVMWrapper4(arg1, arg2, arg3, arg4)
290 #endif
291
292
293 // Interface version /////////////////////////////////////////////////////////////////////
294
295
296 JVM_LEAF(jint, JVM_GetInterfaceVersion())
297 return JVM_INTERFACE_VERSION;
298 JVM_END
299
300
301 // java.lang.System //////////////////////////////////////////////////////////////////////
302
303
304 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
305 JVMWrapper("JVM_CurrentTimeMillis");
306 return os::javaTimeMillis();
307 JVM_END
308
309 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
310 JVMWrapper("JVM_NanoTime");
311 return os::javaTimeNanos();
312 JVM_END
313
314
315 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
316 jobject dst, jint dst_pos, jint length))
317 JVMWrapper("JVM_ArrayCopy");
318 // Check if we have null pointers
319 if (src == NULL || dst == NULL) {
320 THROW(vmSymbols::java_lang_NullPointerException());
321 }
322 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
323 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
324 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
325 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
326 // Do copy
327 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
328 JVM_END
329
330
331 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
332 JavaValue r(T_OBJECT);
333 // public synchronized Object put(Object key, Object value);
334 HandleMark hm(THREAD);
335 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
336 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
337 JavaCalls::call_virtual(&r,
338 props,
339 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
340 vmSymbols::put_name(),
341 vmSymbols::object_object_object_signature(),
342 key_str,
343 value_str,
344 THREAD);
345 }
346
347
348 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
349
350
351 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
352 JVMWrapper("JVM_InitProperties");
353 ResourceMark rm;
354
355 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
356
357 // System property list includes both user set via -D option and
358 // jvm system specific properties.
359 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
360 PUTPROP(props, p->key(), p->value());
361 }
362
363 // Convert the -XX:MaxDirectMemorySize= command line flag
364 // to the sun.nio.MaxDirectMemorySize property.
365 // Do this after setting user properties to prevent people
366 // from setting the value with a -D option, as requested.
367 {
368 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
369 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
370 } else {
371 char as_chars[256];
372 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
373 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
374 }
375 }
376
377 // JVM monitoring and management support
378 // Add the sun.management.compiler property for the compiler's name
379 {
380 #undef CSIZE
381 #if defined(_LP64) || defined(_WIN64)
382 #define CSIZE "64-Bit "
383 #else
384 #define CSIZE
385 #endif // 64bit
386
387 #ifdef TIERED
388 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
389 #else
390 #if defined(COMPILER1)
391 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
392 #elif defined(COMPILER2)
393 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
394 #else
395 const char* compiler_name = "";
396 #endif // compilers
397 #endif // TIERED
398
399 if (*compiler_name != '\0' &&
400 (Arguments::mode() != Arguments::_int)) {
401 PUTPROP(props, "sun.management.compiler", compiler_name);
402 }
403 }
404
405 const char* enableSharedLookupCache = "false";
406 #if INCLUDE_CDS
407 if (ClassLoaderExt::is_lookup_cache_enabled()) {
408 enableSharedLookupCache = "true";
409 }
410 #endif
411 PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache);
412
413 return properties;
414 JVM_END
415
416
417 /*
418 * Return the temporary directory that the VM uses for the attach
419 * and perf data files.
420 *
421 * It is important that this directory is well-known and the
422 * same for all VM instances. It cannot be affected by configuration
423 * variables such as java.io.tmpdir.
424 */
425 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
426 JVMWrapper("JVM_GetTemporaryDirectory");
427 HandleMark hm(THREAD);
428 const char* temp_dir = os::get_temp_directory();
429 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
430 return (jstring) JNIHandles::make_local(env, h());
431 JVM_END
432
433
434 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
435
436 extern volatile jint vm_created;
437
438 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
439 if (vm_created != 0 && (code == 0)) {
440 // The VM is about to exit. We call back into Java to check whether finalizers should be run
441 Universe::run_finalizers_on_exit();
442 }
443 before_exit(thread);
444 vm_exit(code);
445 JVM_END
446
447
448 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
449 JVMWrapper("JVM_BeforeHalt");
450 EventShutdown event;
451 if (event.should_commit()) {
452 event.set_reason("Shutdown requested from Java");
453 event.commit();
454 }
455 JVM_END
456
457
458 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
459 before_exit(thread);
460 vm_exit(code);
461 JVM_END
462
463
464 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
465 register_on_exit_function(func);
466 JVM_END
467
468
469 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
470 JVMWrapper("JVM_GC");
471 if (!DisableExplicitGC) {
472 Universe::heap()->collect(GCCause::_java_lang_system_gc);
473 }
474 JVM_END
475
476
477 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
478 JVMWrapper("JVM_MaxObjectInspectionAge");
479 return Universe::heap()->millis_since_last_gc();
480 JVM_END
481
482
483 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
484 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
485 JVM_END
486
487
488 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
489 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
490 JVM_END
491
492 static inline jlong convert_size_t_to_jlong(size_t val) {
493 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
494 NOT_LP64 (return (jlong)val;)
495 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
496 }
497
498 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
499 JVMWrapper("JVM_TotalMemory");
500 size_t n = Universe::heap()->capacity();
501 return convert_size_t_to_jlong(n);
502 JVM_END
503
504
505 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
506 JVMWrapper("JVM_FreeMemory");
507 CollectedHeap* ch = Universe::heap();
508 size_t n;
509 {
510 MutexLocker x(Heap_lock);
511 n = ch->capacity() - ch->used();
512 }
513 return convert_size_t_to_jlong(n);
514 JVM_END
515
516
517 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
518 JVMWrapper("JVM_MaxMemory");
519 size_t n = Universe::heap()->max_capacity();
520 return convert_size_t_to_jlong(n);
521 JVM_END
522
523
524 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
525 JVMWrapper("JVM_ActiveProcessorCount");
526 return os::active_processor_count();
527 JVM_END
528
529
530 JVM_ENTRY_NO_ENV(jboolean, JVM_IsUseContainerSupport(void))
531 JVMWrapper("JVM_IsUseContainerSupport");
532 #ifdef TARGET_OS_FAMILY_linux
533 if (UseContainerSupport) {
534 return JNI_TRUE;
535 }
536 #endif
537 return JNI_FALSE;
538 JVM_END
539
540
541
542 // java.lang.Throwable //////////////////////////////////////////////////////
543
544
545 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
546 JVMWrapper("JVM_FillInStackTrace");
547 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
548 java_lang_Throwable::fill_in_stack_trace(exception);
549 JVM_END
550
551
552 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
553 JVMWrapper("JVM_GetStackTraceDepth");
554 oop exception = JNIHandles::resolve(throwable);
555 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
556 JVM_END
557
558
559 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
560 JVMWrapper("JVM_GetStackTraceElement");
561 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
562 oop exception = JNIHandles::resolve(throwable);
563 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
564 return JNIHandles::make_local(env, element);
565 JVM_END
566
567
568 // java.lang.Object ///////////////////////////////////////////////
569
570
571 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
572 JVMWrapper("JVM_IHashCode");
573 // as implemented in the classic virtual machine; return 0 if object is NULL
574 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
575 JVM_END
576
577
578 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
579 JVMWrapper("JVM_MonitorWait");
580 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
581 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
582 if (JvmtiExport::should_post_monitor_wait()) {
583 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
584
585 // The current thread already owns the monitor and it has not yet
586 // been added to the wait queue so the current thread cannot be
587 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
588 // event handler cannot accidentally consume an unpark() meant for
589 // the ParkEvent associated with this ObjectMonitor.
590 }
591 ObjectSynchronizer::wait(obj, ms, CHECK);
592 JVM_END
593
594
595 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
596 JVMWrapper("JVM_MonitorNotify");
597 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
598 ObjectSynchronizer::notify(obj, CHECK);
599 JVM_END
600
601
602 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
603 JVMWrapper("JVM_MonitorNotifyAll");
604 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
605 ObjectSynchronizer::notifyall(obj, CHECK);
606 JVM_END
607
608
609 static void fixup_cloned_reference(ReferenceType ref_type, oop src, oop clone) {
610 // If G1 is enabled then we need to register a non-null referent
611 // with the SATB barrier.
612 #if INCLUDE_ALL_GCS
613 if (UseG1GC || (UseShenandoahGC && ShenandoahSATBBarrier)) {
614 oop referent = java_lang_ref_Reference::referent(clone);
615 if (referent != NULL) {
616 G1SATBCardTableModRefBS::enqueue(referent);
617 }
618 }
619 #endif // INCLUDE_ALL_GCS
620 if ((java_lang_ref_Reference::next(clone) != NULL) ||
621 (java_lang_ref_Reference::queue(clone) == java_lang_ref_ReferenceQueue::ENQUEUED_queue())) {
622 // If the source has been enqueued or is being enqueued, don't
623 // register the clone with a queue.
624 java_lang_ref_Reference::set_queue(clone, java_lang_ref_ReferenceQueue::NULL_queue());
625 }
626 // discovered and next are list links; the clone is not in those lists.
627 java_lang_ref_Reference::set_discovered(clone, NULL);
628 java_lang_ref_Reference::set_next(clone, NULL);
629 }
630
631 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
632 JVMWrapper("JVM_Clone");
633 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
634 const KlassHandle klass (THREAD, obj->klass());
635 JvmtiVMObjectAllocEventCollector oam;
636
637 #ifdef ASSERT
638 // Just checking that the cloneable flag is set correct
639 if (obj->is_array()) {
640 guarantee(klass->is_cloneable(), "all arrays are cloneable");
641 } else {
642 guarantee(obj->is_instance(), "should be instanceOop");
643 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
644 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
645 }
646 #endif
647
648 // Check if class of obj supports the Cloneable interface.
649 // All arrays are considered to be cloneable (See JLS 20.1.5)
650 if (!klass->is_cloneable()) {
651 ResourceMark rm(THREAD);
652 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
653 }
654
655 // Make shallow object copy
656 ReferenceType ref_type = REF_NONE;
657 const int size = obj->size();
658 oop new_obj_oop = NULL;
659 if (obj->is_array()) {
660 const int length = ((arrayOop)obj())->length();
661 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
662 } else {
663 ref_type = InstanceKlass::cast(klass())->reference_type();
664 assert((ref_type == REF_NONE) ==
665 !klass->is_subclass_of(SystemDictionary::Reference_klass()),
666 "invariant");
667 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
668 }
669
670 #if INCLUDE_ALL_GCS
671 if (UseShenandoahGC && ShenandoahCloneBarrier) {
672 ShenandoahBarrierSet::barrier_set()->clone_barrier_runtime(obj());
673 }
674 #endif
675
676 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
677 // is modifying a reference field in the clonee, a non-oop-atomic copy might
678 // be suspended in the middle of copying the pointer and end up with parts
679 // of two different pointers in the field. Subsequent dereferences will crash.
680 // 4846409: an oop-copy of objects with long or double fields or arrays of same
681 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
682 // of oops. We know objects are aligned on a minimum of an jlong boundary.
683 // The same is true of StubRoutines::object_copy and the various oop_copy
684 // variants, and of the code generated by the inline_native_clone intrinsic.
685 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
686 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
687 (size_t)align_object_size(size) / HeapWordsPerLong);
688 // Clear the header
689 new_obj_oop->init_mark();
690
691 // Store check (mark entire object and let gc sort it out)
692 BarrierSet* bs = Universe::heap()->barrier_set();
693 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
694 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
695
696 // If cloning a Reference, set Reference fields to a safe state.
697 // Fixup must be completed before any safepoint.
698 if (ref_type != REF_NONE) {
699 fixup_cloned_reference(ref_type, obj(), new_obj_oop);
700 }
701
702 Handle new_obj(THREAD, new_obj_oop);
703 // Special handling for MemberNames. Since they contain Method* metadata, they
704 // must be registered so that RedefineClasses can fix metadata contained in them.
705 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
706 java_lang_invoke_MemberName::is_method(new_obj())) {
707 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
708 // MemberName may be unresolved, so doesn't need registration until resolved.
709 if (method != NULL) {
710 methodHandle m(THREAD, method);
711 // This can safepoint and redefine method, so need both new_obj and method
712 // in a handle, for two different reasons. new_obj can move, method can be
713 // deleted if nothing is using it on the stack.
714 m->method_holder()->add_member_name(new_obj(), false);
715 }
716 }
717
718 // Caution: this involves a java upcall, so the clone should be
719 // "gc-robust" by this stage.
720 if (klass->has_finalizer()) {
721 assert(obj->is_instance(), "should be instanceOop");
722 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
723 new_obj = Handle(THREAD, new_obj_oop);
724 }
725
726 return JNIHandles::make_local(env, new_obj());
727 JVM_END
728
729 // java.lang.Compiler ////////////////////////////////////////////////////
730
731 // The initial cuts of the HotSpot VM will not support JITs, and all existing
732 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
733 // functions are all silently ignored unless JVM warnings are printed.
734
735 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
736 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
737 JVM_END
738
739
740 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
741 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
742 return JNI_FALSE;
743 JVM_END
744
745
746 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
747 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
748 return JNI_FALSE;
749 JVM_END
750
751
752 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
753 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
754 return JNI_FALSE;
755 JVM_END
756
757
758 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
759 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
760 return NULL;
761 JVM_END
762
763
764 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
765 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
766 JVM_END
767
768
769 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
770 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
771 JVM_END
772
773
774
775 // Error message support //////////////////////////////////////////////////////
776
777 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
778 JVMWrapper("JVM_GetLastErrorString");
779 return (jint)os::lasterror(buf, len);
780 JVM_END
781
782
783 // java.io.File ///////////////////////////////////////////////////////////////
784
785 JVM_LEAF(char*, JVM_NativePath(char* path))
786 JVMWrapper2("JVM_NativePath (%s)", path);
787 return os::native_path(path);
788 JVM_END
789
790
791 // java.nio.Bits ///////////////////////////////////////////////////////////////
792
793 #define MAX_OBJECT_SIZE \
794 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \
795 + ((julong)max_jint * sizeof(double)) )
796
797 static inline jlong field_offset_to_byte_offset(jlong field_offset) {
798 return field_offset;
799 }
800
801 static inline void assert_field_offset_sane(oop p, jlong field_offset) {
802 #ifdef ASSERT
803 jlong byte_offset = field_offset_to_byte_offset(field_offset);
804
805 if (p != NULL) {
806 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset");
807 if (byte_offset == (jint)byte_offset) {
808 void* ptr_plus_disp = (address)p + byte_offset;
809 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp,
810 "raw [ptr+disp] must be consistent with oop::field_base");
811 }
812 jlong p_size = HeapWordSize * (jlong)(p->size());
813 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT
814 " > object's size " INT64_FORMAT,
815 (int64_t)byte_offset, (int64_t)p_size));
816 }
817 #endif
818 }
819
820 static inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
821 assert_field_offset_sane(p, field_offset);
822 jlong byte_offset = field_offset_to_byte_offset(field_offset);
823
824 if (sizeof(char*) == sizeof(jint)) { // (this constant folds!)
825 return (address)p + (jint) byte_offset;
826 } else {
827 return (address)p + byte_offset;
828 }
829 }
830
831 // This function is a leaf since if the source and destination are both in native memory
832 // the copy may potentially be very large, and we don't want to disable GC if we can avoid it.
833 // If either source or destination (or both) are on the heap, the function will enter VM using
834 // JVM_ENTRY_FROM_LEAF
835 JVM_LEAF(void, JVM_CopySwapMemory(JNIEnv *env, jobject srcObj, jlong srcOffset,
836 jobject dstObj, jlong dstOffset, jlong size,
837 jlong elemSize)) {
838
839 size_t sz = (size_t)size;
840 size_t esz = (size_t)elemSize;
841
842 if (srcObj == NULL && dstObj == NULL) {
843 // Both src & dst are in native memory
844 address src = (address)srcOffset;
845 address dst = (address)dstOffset;
846
847 Copy::conjoint_swap(src, dst, sz, esz);
848 } else {
849 // At least one of src/dst are on heap, transition to VM to access raw pointers
850
851 JVM_ENTRY_FROM_LEAF(env, void, JVM_CopySwapMemory) {
852 oop srcp = JNIHandles::resolve(srcObj);
853 oop dstp = JNIHandles::resolve(dstObj);
854
855 address src = (address)index_oop_from_field_offset_long(srcp, srcOffset);
856 address dst = (address)index_oop_from_field_offset_long(dstp, dstOffset);
857
858 Copy::conjoint_swap(src, dst, sz, esz);
859 } JVM_END
860 }
861 } JVM_END
862
863
864 // Misc. class handling ///////////////////////////////////////////////////////////
865
866
867 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
868 JVMWrapper("JVM_GetCallerClass");
869
870 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
871 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
872 // temporarily for existing code to use until a replacement API is defined.
873 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
874 Klass* k = thread->security_get_caller_class(depth);
875 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
876 }
877
878 // Getting the class of the caller frame.
879 //
880 // The call stack at this point looks something like this:
881 //
882 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
883 // [1] [ @CallerSensitive API.method ]
884 // [.] [ (skipped intermediate frames) ]
885 // [n] [ caller ]
886 vframeStream vfst(thread);
887 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
888 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
889 Method* m = vfst.method();
890 assert(m != NULL, "sanity");
891 switch (n) {
892 case 0:
893 // This must only be called from Reflection.getCallerClass
894 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
895 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
896 }
897 // fall-through
898 case 1:
899 // Frame 0 and 1 must be caller sensitive.
900 if (!m->caller_sensitive()) {
901 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
902 }
903 break;
904 default:
905 if (!m->is_ignored_by_security_stack_walk()) {
906 // We have reached the desired frame; return the holder class.
907 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
908 }
909 break;
910 }
911 }
912 return NULL;
913 JVM_END
914
915
916 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
917 JVMWrapper("JVM_FindPrimitiveClass");
918 oop mirror = NULL;
919 BasicType t = name2type(utf);
920 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
921 mirror = Universe::java_mirror(t);
922 }
923 if (mirror == NULL) {
924 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
925 } else {
926 return (jclass) JNIHandles::make_local(env, mirror);
927 }
928 JVM_END
929
930
931 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
932 JVMWrapper("JVM_ResolveClass");
933 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
934 JVM_END
935
936
937 JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname))
938 JVMWrapper("JVM_KnownToNotExist");
939 #if INCLUDE_CDS
940 return ClassLoaderExt::known_to_not_exist(env, loader, classname, THREAD);
941 #else
942 return false;
943 #endif
944 JVM_END
945
946
947 JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader))
948 JVMWrapper("JVM_GetResourceLookupCacheURLs");
949 #if INCLUDE_CDS
950 return ClassLoaderExt::get_lookup_cache_urls(env, loader, THREAD);
951 #else
952 return NULL;
953 #endif
954 JVM_END
955
956
957 JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name))
958 JVMWrapper("JVM_GetResourceLookupCache");
959 #if INCLUDE_CDS
960 return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, THREAD);
961 #else
962 return NULL;
963 #endif
964 JVM_END
965
966
967 // Returns a class loaded by the bootstrap class loader; or null
968 // if not found. ClassNotFoundException is not thrown.
969 //
970 // Rationale behind JVM_FindClassFromBootLoader
971 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
972 // b> because of (a) java.dll has a direct dependecy on the unexported
973 // private symbol "_JVM_FindClassFromClassLoader@20".
974 // c> the launcher cannot use the private symbol as it dynamically opens
975 // the entry point, so if something changes, the launcher will fail
976 // unexpectedly at runtime, it is safest for the launcher to dlopen a
977 // stable exported interface.
978 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
979 // signature to change from _JVM_FindClassFromClassLoader@20 to
980 // JVM_FindClassFromClassLoader and will not be backward compatible
981 // with older JDKs.
982 // Thus a public/stable exported entry point is the right solution,
983 // public here means public in linker semantics, and is exported only
984 // to the JDK, and is not intended to be a public API.
985
986 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
987 const char* name))
988 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
989
990 // Java libraries should ensure that name is never null...
991 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
992 // It's impossible to create this class; the name cannot fit
993 // into the constant pool.
994 return NULL;
995 }
996
997 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
998 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
999 if (k == NULL) {
1000 return NULL;
1001 }
1002
1003 if (TraceClassResolution) {
1004 trace_class_resolution(k);
1005 }
1006 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1007 JVM_END
1008
1009 // Not used; JVM_FindClassFromCaller replaces this.
1010 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
1011 jboolean init, jobject loader,
1012 jboolean throwError))
1013 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
1014 throwError ? "error" : "exception");
1015 // Java libraries should ensure that name is never null...
1016 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1017 // It's impossible to create this class; the name cannot fit
1018 // into the constant pool.
1019 if (throwError) {
1020 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1021 } else {
1022 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
1023 }
1024 }
1025 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1026 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1027 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1028 Handle(), throwError, THREAD);
1029
1030 if (TraceClassResolution && result != NULL) {
1031 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
1032 }
1033 return result;
1034 JVM_END
1035
1036 // Find a class with this name in this loader, using the caller's protection domain.
1037 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
1038 jboolean init, jobject loader,
1039 jclass caller))
1040 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
1041 // Java libraries should ensure that name is never null...
1042 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1043 // It's impossible to create this class; the name cannot fit
1044 // into the constant pool.
1045 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
1046 }
1047
1048 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1049
1050 oop loader_oop = JNIHandles::resolve(loader);
1051 oop from_class = JNIHandles::resolve(caller);
1052 oop protection_domain = NULL;
1053 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
1054 // NPE. Put it in another way, the bootstrap class loader has all permission and
1055 // thus no checkPackageAccess equivalence in the VM class loader.
1056 // The caller is also passed as NULL by the java code if there is no security
1057 // manager to avoid the performance cost of getting the calling class.
1058 if (from_class != NULL && loader_oop != NULL) {
1059 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
1060 }
1061
1062 Handle h_loader(THREAD, loader_oop);
1063 Handle h_prot(THREAD, protection_domain);
1064 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1065 h_prot, false, THREAD);
1066
1067 if (TraceClassResolution && result != NULL) {
1068 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
1069 }
1070 return result;
1071 JVM_END
1072
1073 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
1074 jboolean init, jclass from))
1075 JVMWrapper2("JVM_FindClassFromClass %s", name);
1076 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
1077 // It's impossible to create this class; the name cannot fit
1078 // into the constant pool.
1079 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1080 }
1081 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
1082 oop from_class_oop = JNIHandles::resolve(from);
1083 Klass* from_class = (from_class_oop == NULL)
1084 ? (Klass*)NULL
1085 : java_lang_Class::as_Klass(from_class_oop);
1086 oop class_loader = NULL;
1087 oop protection_domain = NULL;
1088 if (from_class != NULL) {
1089 class_loader = from_class->class_loader();
1090 protection_domain = from_class->protection_domain();
1091 }
1092 Handle h_loader(THREAD, class_loader);
1093 Handle h_prot (THREAD, protection_domain);
1094 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
1095 h_prot, true, thread);
1096
1097 if (TraceClassResolution && result != NULL) {
1098 // this function is generally only used for class loading during verification.
1099 ResourceMark rm;
1100 oop from_mirror = JNIHandles::resolve_non_null(from);
1101 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
1102 const char * from_name = from_class->external_name();
1103
1104 oop mirror = JNIHandles::resolve_non_null(result);
1105 Klass* to_class = java_lang_Class::as_Klass(mirror);
1106 const char * to = to_class->external_name();
1107 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
1108 }
1109
1110 return result;
1111 JVM_END
1112
1113 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
1114 if (loader.is_null()) {
1115 return;
1116 }
1117
1118 // check whether the current caller thread holds the lock or not.
1119 // If not, increment the corresponding counter
1120 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
1121 ObjectSynchronizer::owner_self) {
1122 counter->inc();
1123 }
1124 }
1125
1126 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
1127 // and JVM_DefineClassWithSourceCond()
1128 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
1129 jobject loader, const jbyte *buf,
1130 jsize len, jobject pd, const char *source,
1131 jboolean verify, TRAPS) {
1132 if (source == NULL) source = "__JVM_DefineClass__";
1133
1134 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1135 JavaThread* jt = (JavaThread*) THREAD;
1136
1137 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
1138 ClassLoader::perf_define_appclass_selftime(),
1139 ClassLoader::perf_define_appclasses(),
1140 jt->get_thread_stat()->perf_recursion_counts_addr(),
1141 jt->get_thread_stat()->perf_timers_addr(),
1142 PerfClassTraceTime::DEFINE_CLASS);
1143
1144 if (UsePerfData) {
1145 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
1146 }
1147
1148 // Since exceptions can be thrown, class initialization can take place
1149 // if name is NULL no check for class name in .class stream has to be made.
1150 TempNewSymbol class_name = NULL;
1151 if (name != NULL) {
1152 const int str_len = (int)strlen(name);
1153 if (str_len > Symbol::max_length()) {
1154 // It's impossible to create this class; the name cannot fit
1155 // into the constant pool.
1156 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1157 }
1158 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
1159 }
1160
1161 ResourceMark rm(THREAD);
1162 ClassFileStream st((u1*) buf, len, (char *)source);
1163 Handle class_loader (THREAD, JNIHandles::resolve(loader));
1164 if (UsePerfData) {
1165 is_lock_held_by_thread(class_loader,
1166 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
1167 THREAD);
1168 }
1169 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1170 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
1171 protection_domain, &st,
1172 verify != 0,
1173 CHECK_NULL);
1174
1175 if (TraceClassResolution && k != NULL) {
1176 trace_class_resolution(k);
1177 }
1178
1179 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1180 }
1181
1182 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1183 JVMWrapper2("JVM_DefineClass %s", name);
1184
1185 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1186 JVM_END
1187
1188
1189 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1190 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1191
1192 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1193 JVM_END
1194
1195 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1196 jobject loader, const jbyte *buf,
1197 jsize len, jobject pd,
1198 const char *source, jboolean verify))
1199 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1200
1201 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1202 JVM_END
1203
1204 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1205 JVMWrapper("JVM_FindLoadedClass");
1206 ResourceMark rm(THREAD);
1207
1208 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1209 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1210
1211 const char* str = java_lang_String::as_utf8_string(string());
1212 // Sanity check, don't expect null
1213 if (str == NULL) return NULL;
1214
1215 const int str_len = (int)strlen(str);
1216 if (str_len > Symbol::max_length()) {
1217 // It's impossible to create this class; the name cannot fit
1218 // into the constant pool.
1219 return NULL;
1220 }
1221 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1222
1223 // Security Note:
1224 // The Java level wrapper will perform the necessary security check allowing
1225 // us to pass the NULL as the initiating class loader.
1226 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1227 if (UsePerfData) {
1228 is_lock_held_by_thread(h_loader,
1229 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1230 THREAD);
1231 }
1232
1233 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1234 h_loader,
1235 Handle(),
1236 CHECK_NULL);
1237 #if INCLUDE_CDS
1238 if (k == NULL) {
1239 // If the class is not already loaded, try to see if it's in the shared
1240 // archive for the current classloader (h_loader).
1241 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1242 klass_name, h_loader, CHECK_NULL);
1243 k = ik();
1244 }
1245 #endif
1246 return (k == NULL) ? NULL :
1247 (jclass) JNIHandles::make_local(env, k->java_mirror());
1248 JVM_END
1249
1250
1251 // Reflection support //////////////////////////////////////////////////////////////////////////////
1252
1253 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1254 assert (cls != NULL, "illegal class");
1255 JVMWrapper("JVM_GetClassName");
1256 JvmtiVMObjectAllocEventCollector oam;
1257 ResourceMark rm(THREAD);
1258 const char* name;
1259 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1260 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1261 } else {
1262 // Consider caching interned string in Klass
1263 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1264 assert(k->is_klass(), "just checking");
1265 name = k->external_name();
1266 }
1267 oop result = StringTable::intern((char*) name, CHECK_NULL);
1268 return (jstring) JNIHandles::make_local(env, result);
1269 JVM_END
1270
1271
1272 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1273 JVMWrapper("JVM_GetClassInterfaces");
1274 JvmtiVMObjectAllocEventCollector oam;
1275 oop mirror = JNIHandles::resolve_non_null(cls);
1276
1277 // Special handling for primitive objects
1278 if (java_lang_Class::is_primitive(mirror)) {
1279 // Primitive objects does not have any interfaces
1280 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1281 return (jobjectArray) JNIHandles::make_local(env, r);
1282 }
1283
1284 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1285 // Figure size of result array
1286 int size;
1287 if (klass->oop_is_instance()) {
1288 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1289 } else {
1290 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1291 size = 2;
1292 }
1293
1294 // Allocate result array
1295 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1296 objArrayHandle result (THREAD, r);
1297 // Fill in result
1298 if (klass->oop_is_instance()) {
1299 // Regular instance klass, fill in all local interfaces
1300 for (int index = 0; index < size; index++) {
1301 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1302 result->obj_at_put(index, k->java_mirror());
1303 }
1304 } else {
1305 // All arrays implement java.lang.Cloneable and java.io.Serializable
1306 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1307 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1308 }
1309 return (jobjectArray) JNIHandles::make_local(env, result());
1310 JVM_END
1311
1312
1313 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1314 JVMWrapper("JVM_GetClassLoader");
1315 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1316 return NULL;
1317 }
1318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1319 oop loader = k->class_loader();
1320 return JNIHandles::make_local(env, loader);
1321 JVM_END
1322
1323
1324 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1325 JVMWrapper("JVM_IsInterface");
1326 oop mirror = JNIHandles::resolve_non_null(cls);
1327 if (java_lang_Class::is_primitive(mirror)) {
1328 return JNI_FALSE;
1329 }
1330 Klass* k = java_lang_Class::as_Klass(mirror);
1331 jboolean result = k->is_interface();
1332 assert(!result || k->oop_is_instance(),
1333 "all interfaces are instance types");
1334 // The compiler intrinsic for isInterface tests the
1335 // Klass::_access_flags bits in the same way.
1336 return result;
1337 JVM_END
1338
1339
1340 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1341 JVMWrapper("JVM_GetClassSigners");
1342 JvmtiVMObjectAllocEventCollector oam;
1343 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1344 // There are no signers for primitive types
1345 return NULL;
1346 }
1347
1348 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1349
1350 // If there are no signers set in the class, or if the class
1351 // is an array, return NULL.
1352 if (signers == NULL) return NULL;
1353
1354 // copy of the signers array
1355 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1356 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1357 for (int index = 0; index < signers->length(); index++) {
1358 signers_copy->obj_at_put(index, signers->obj_at(index));
1359 }
1360
1361 // return the copy
1362 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1363 JVM_END
1364
1365
1366 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1367 JVMWrapper("JVM_SetClassSigners");
1368 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1369 // This call is ignored for primitive types and arrays.
1370 // Signers are only set once, ClassLoader.java, and thus shouldn't
1371 // be called with an array. Only the bootstrap loader creates arrays.
1372 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1373 if (k->oop_is_instance()) {
1374 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1375 }
1376 }
1377 JVM_END
1378
1379
1380 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1381 JVMWrapper("JVM_GetProtectionDomain");
1382 if (JNIHandles::resolve(cls) == NULL) {
1383 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1384 }
1385
1386 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1387 // Primitive types does not have a protection domain.
1388 return NULL;
1389 }
1390
1391 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1392 return (jobject) JNIHandles::make_local(env, pd);
1393 JVM_END
1394
1395
1396 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1397 // If there is a security manager and protection domain, check the access
1398 // in the protection domain, otherwise it is authorized.
1399 if (java_lang_System::has_security_manager()) {
1400
1401 // For bootstrapping, if pd implies method isn't in the JDK, allow
1402 // this context to revert to older behavior.
1403 // In this case the isAuthorized field in AccessControlContext is also not
1404 // present.
1405 if (Universe::protection_domain_implies_method() == NULL) {
1406 return true;
1407 }
1408
1409 // Whitelist certain access control contexts
1410 if (java_security_AccessControlContext::is_authorized(context)) {
1411 return true;
1412 }
1413
1414 oop prot = klass->protection_domain();
1415 if (prot != NULL) {
1416 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1417 // in the new wrapper.
1418 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1419 Handle h_prot(THREAD, prot);
1420 JavaValue result(T_BOOLEAN);
1421 JavaCallArguments args(h_prot);
1422 JavaCalls::call(&result, m, &args, CHECK_false);
1423 return (result.get_jboolean() != 0);
1424 }
1425 }
1426 return true;
1427 }
1428
1429 // Create an AccessControlContext with a protection domain with null codesource
1430 // and null permissions - which gives no permissions.
1431 oop create_dummy_access_control_context(TRAPS) {
1432 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1433 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1434 // Call constructor ProtectionDomain(null, null);
1435 JavaValue result(T_VOID);
1436 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1437 vmSymbols::object_initializer_name(),
1438 vmSymbols::codesource_permissioncollection_signature(),
1439 Handle(), Handle(), CHECK_NULL);
1440
1441 // new ProtectionDomain[] {pd};
1442 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1443 context->obj_at_put(0, obj());
1444
1445 // new AccessControlContext(new ProtectionDomain[] {pd})
1446 objArrayHandle h_context(THREAD, context);
1447 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1448 return acc;
1449 }
1450
1451 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1452 JVMWrapper("JVM_DoPrivileged");
1453
1454 if (action == NULL) {
1455 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1456 }
1457
1458 // Compute the frame initiating the do privileged operation and setup the privileged stack
1459 vframeStream vfst(thread);
1460 vfst.security_get_caller_frame(1);
1461
1462 if (vfst.at_end()) {
1463 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1464 }
1465
1466 Method* method = vfst.method();
1467 instanceKlassHandle klass (THREAD, method->method_holder());
1468
1469 // Check that action object understands "Object run()"
1470 Handle h_context;
1471 if (context != NULL) {
1472 h_context = Handle(THREAD, JNIHandles::resolve(context));
1473 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1474 if (!authorized) {
1475 // Create an unprivileged access control object and call it's run function
1476 // instead.
1477 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1478 h_context = Handle(THREAD, noprivs);
1479 }
1480 }
1481
1482 // Check that action object understands "Object run()"
1483 Handle object (THREAD, JNIHandles::resolve(action));
1484
1485 // get run() method
1486 Method* m_oop = object->klass()->uncached_lookup_method(
1487 vmSymbols::run_method_name(),
1488 vmSymbols::void_object_signature(),
1489 Klass::find_overpass);
1490 methodHandle m (THREAD, m_oop);
1491 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1492 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1493 }
1494
1495 // Stack allocated list of privileged stack elements
1496 PrivilegedElement pi;
1497 if (!vfst.at_end()) {
1498 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1499 thread->set_privileged_stack_top(&pi);
1500 }
1501
1502
1503 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1504 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1505 Handle pending_exception;
1506 JavaValue result(T_OBJECT);
1507 JavaCallArguments args(object);
1508 JavaCalls::call(&result, m, &args, THREAD);
1509
1510 // done with action, remove ourselves from the list
1511 if (!vfst.at_end()) {
1512 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1513 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1514 }
1515
1516 if (HAS_PENDING_EXCEPTION) {
1517 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1518 CLEAR_PENDING_EXCEPTION;
1519 // JVMTI has already reported the pending exception
1520 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1521 if (THREAD->is_Java_thread()) {
1522 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1523 }
1524 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1525 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1526 // Throw a java.security.PrivilegedActionException(Exception e) exception
1527 JavaCallArguments args(pending_exception);
1528 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1529 vmSymbols::exception_void_signature(),
1530 &args);
1531 }
1532 }
1533
1534 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1535 return JNIHandles::make_local(env, (oop) result.get_jobject());
1536 JVM_END
1537
1538
1539 // Returns the inherited_access_control_context field of the running thread.
1540 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1541 JVMWrapper("JVM_GetInheritedAccessControlContext");
1542 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1543 return JNIHandles::make_local(env, result);
1544 JVM_END
1545
1546 class RegisterArrayForGC {
1547 private:
1548 JavaThread *_thread;
1549 public:
1550 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1551 _thread = thread;
1552 _thread->register_array_for_gc(array);
1553 }
1554
1555 ~RegisterArrayForGC() {
1556 _thread->register_array_for_gc(NULL);
1557 }
1558 };
1559
1560
1561 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1562 JVMWrapper("JVM_GetStackAccessControlContext");
1563 if (!UsePrivilegedStack) return NULL;
1564
1565 ResourceMark rm(THREAD);
1566 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1567 JvmtiVMObjectAllocEventCollector oam;
1568
1569 // count the protection domains on the execution stack. We collapse
1570 // duplicate consecutive protection domains into a single one, as
1571 // well as stopping when we hit a privileged frame.
1572
1573 // Use vframeStream to iterate through Java frames
1574 vframeStream vfst(thread);
1575
1576 oop previous_protection_domain = NULL;
1577 Handle privileged_context(thread, NULL);
1578 bool is_privileged = false;
1579 oop protection_domain = NULL;
1580
1581 for(; !vfst.at_end(); vfst.next()) {
1582 // get method of frame
1583 Method* method = vfst.method();
1584 intptr_t* frame_id = vfst.frame_id();
1585
1586 // check the privileged frames to see if we have a match
1587 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1588 // this frame is privileged
1589 is_privileged = true;
1590 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1591 protection_domain = thread->privileged_stack_top()->protection_domain();
1592 } else {
1593 protection_domain = method->method_holder()->protection_domain();
1594 }
1595
1596 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1597 local_array->push(protection_domain);
1598 previous_protection_domain = protection_domain;
1599 }
1600
1601 if (is_privileged) break;
1602 }
1603
1604
1605 // either all the domains on the stack were system domains, or
1606 // we had a privileged system domain
1607 if (local_array->is_empty()) {
1608 if (is_privileged && privileged_context.is_null()) return NULL;
1609
1610 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1611 return JNIHandles::make_local(env, result);
1612 }
1613
1614 // the resource area must be registered in case of a gc
1615 RegisterArrayForGC ragc(thread, local_array);
1616 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1617 local_array->length(), CHECK_NULL);
1618 objArrayHandle h_context(thread, context);
1619 for (int index = 0; index < local_array->length(); index++) {
1620 h_context->obj_at_put(index, local_array->at(index));
1621 }
1622
1623 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1624
1625 return JNIHandles::make_local(env, result);
1626 JVM_END
1627
1628
1629 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1630 JVMWrapper("JVM_IsArrayClass");
1631 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1632 return (k != NULL) && k->oop_is_array() ? true : false;
1633 JVM_END
1634
1635
1636 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1637 JVMWrapper("JVM_IsPrimitiveClass");
1638 oop mirror = JNIHandles::resolve_non_null(cls);
1639 return (jboolean) java_lang_Class::is_primitive(mirror);
1640 JVM_END
1641
1642
1643 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1644 JVMWrapper("JVM_GetComponentType");
1645 oop mirror = JNIHandles::resolve_non_null(cls);
1646 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1647 return (jclass) JNIHandles::make_local(env, result);
1648 JVM_END
1649
1650
1651 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1652 JVMWrapper("JVM_GetClassModifiers");
1653 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1654 // Primitive type
1655 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1656 }
1657
1658 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1659 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1660 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1661 return k->modifier_flags();
1662 JVM_END
1663
1664
1665 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1666
1667 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1668 JvmtiVMObjectAllocEventCollector oam;
1669 // ofClass is a reference to a java_lang_Class object. The mirror object
1670 // of an InstanceKlass
1671
1672 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1673 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1674 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1675 return (jobjectArray)JNIHandles::make_local(env, result);
1676 }
1677
1678 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1679 InnerClassesIterator iter(k);
1680
1681 if (iter.length() == 0) {
1682 // Neither an inner nor outer class
1683 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1684 return (jobjectArray)JNIHandles::make_local(env, result);
1685 }
1686
1687 // find inner class info
1688 constantPoolHandle cp(thread, k->constants());
1689 int length = iter.length();
1690
1691 // Allocate temp. result array
1692 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1693 objArrayHandle result (THREAD, r);
1694 int members = 0;
1695
1696 for (; !iter.done(); iter.next()) {
1697 int ioff = iter.inner_class_info_index();
1698 int ooff = iter.outer_class_info_index();
1699
1700 if (ioff != 0 && ooff != 0) {
1701 // Check to see if the name matches the class we're looking for
1702 // before attempting to find the class.
1703 if (cp->klass_name_at_matches(k, ooff)) {
1704 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1705 if (outer_klass == k()) {
1706 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1707 instanceKlassHandle inner_klass (THREAD, ik);
1708
1709 // Throws an exception if outer klass has not declared k as
1710 // an inner klass
1711 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1712
1713 result->obj_at_put(members, inner_klass->java_mirror());
1714 members++;
1715 }
1716 }
1717 }
1718 }
1719
1720 if (members != length) {
1721 // Return array of right length
1722 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1723 for(int i = 0; i < members; i++) {
1724 res->obj_at_put(i, result->obj_at(i));
1725 }
1726 return (jobjectArray)JNIHandles::make_local(env, res);
1727 }
1728
1729 return (jobjectArray)JNIHandles::make_local(env, result());
1730 JVM_END
1731
1732
1733 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1734 {
1735 // ofClass is a reference to a java_lang_Class object.
1736 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1737 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1738 return NULL;
1739 }
1740
1741 bool inner_is_member = false;
1742 Klass* outer_klass
1743 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1744 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1745 if (outer_klass == NULL) return NULL; // already a top-level class
1746 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1747 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1748 }
1749 JVM_END
1750
1751 // should be in InstanceKlass.cpp, but is here for historical reasons
1752 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1753 bool* inner_is_member,
1754 TRAPS) {
1755 Thread* thread = THREAD;
1756 InnerClassesIterator iter(k);
1757 if (iter.length() == 0) {
1758 // No inner class info => no declaring class
1759 return NULL;
1760 }
1761
1762 constantPoolHandle i_cp(thread, k->constants());
1763
1764 bool found = false;
1765 Klass* ok;
1766 instanceKlassHandle outer_klass;
1767 *inner_is_member = false;
1768
1769 // Find inner_klass attribute
1770 for (; !iter.done() && !found; iter.next()) {
1771 int ioff = iter.inner_class_info_index();
1772 int ooff = iter.outer_class_info_index();
1773 int noff = iter.inner_name_index();
1774 if (ioff != 0) {
1775 // Check to see if the name matches the class we're looking for
1776 // before attempting to find the class.
1777 if (i_cp->klass_name_at_matches(k, ioff)) {
1778 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1779 found = (k() == inner_klass);
1780 if (found && ooff != 0) {
1781 ok = i_cp->klass_at(ooff, CHECK_NULL);
1782 if (!ok->oop_is_instance()) {
1783 // If the outer class is not an instance klass then it cannot have
1784 // declared any inner classes.
1785 ResourceMark rm(THREAD);
1786 Exceptions::fthrow(
1787 THREAD_AND_LOCATION,
1788 vmSymbols::java_lang_IncompatibleClassChangeError(),
1789 "%s and %s disagree on InnerClasses attribute",
1790 ok->external_name(),
1791 k->external_name());
1792 return NULL;
1793 }
1794 outer_klass = instanceKlassHandle(thread, ok);
1795 *inner_is_member = true;
1796 }
1797 }
1798 }
1799 }
1800
1801 if (found && outer_klass.is_null()) {
1802 // It may be anonymous; try for that.
1803 int encl_method_class_idx = k->enclosing_method_class_index();
1804 if (encl_method_class_idx != 0) {
1805 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1806 outer_klass = instanceKlassHandle(thread, ok);
1807 *inner_is_member = false;
1808 }
1809 }
1810
1811 // If no inner class attribute found for this class.
1812 if (outer_klass.is_null()) return NULL;
1813
1814 // Throws an exception if outer klass has not declared k as an inner klass
1815 // We need evidence that each klass knows about the other, or else
1816 // the system could allow a spoof of an inner class to gain access rights.
1817 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1818 return outer_klass();
1819 }
1820
1821 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1822 assert (cls != NULL, "illegal class");
1823 JVMWrapper("JVM_GetClassSignature");
1824 JvmtiVMObjectAllocEventCollector oam;
1825 ResourceMark rm(THREAD);
1826 // Return null for arrays and primatives
1827 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1828 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1829 if (k->oop_is_instance()) {
1830 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1831 if (sym == NULL) return NULL;
1832 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1833 return (jstring) JNIHandles::make_local(env, str());
1834 }
1835 }
1836 return NULL;
1837 JVM_END
1838
1839
1840 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1841 assert (cls != NULL, "illegal class");
1842 JVMWrapper("JVM_GetClassAnnotations");
1843
1844 // Return null for arrays and primitives
1845 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1846 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1847 if (k->oop_is_instance()) {
1848 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1849 return (jbyteArray) JNIHandles::make_local(env, a);
1850 }
1851 }
1852 return NULL;
1853 JVM_END
1854
1855
1856 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1857 // some of this code was adapted from from jni_FromReflectedField
1858
1859 oop reflected = JNIHandles::resolve_non_null(field);
1860 oop mirror = java_lang_reflect_Field::clazz(reflected);
1861 Klass* k = java_lang_Class::as_Klass(mirror);
1862 int slot = java_lang_reflect_Field::slot(reflected);
1863 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1864
1865 KlassHandle kh(THREAD, k);
1866 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1867
1868 if (modifiers & JVM_ACC_STATIC) {
1869 // for static fields we only look in the current class
1870 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1871 assert(false, "cannot find static field");
1872 return false;
1873 }
1874 } else {
1875 // for instance fields we start with the current class and work
1876 // our way up through the superclass chain
1877 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1878 assert(false, "cannot find instance field");
1879 return false;
1880 }
1881 }
1882 return true;
1883 }
1884
1885 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1886 // field is a handle to a java.lang.reflect.Field object
1887 assert(field != NULL, "illegal field");
1888 JVMWrapper("JVM_GetFieldAnnotations");
1889
1890 fieldDescriptor fd;
1891 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1892 if (!gotFd) {
1893 return NULL;
1894 }
1895
1896 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1897 JVM_END
1898
1899
1900 static Method* jvm_get_method_common(jobject method) {
1901 // some of this code was adapted from from jni_FromReflectedMethod
1902
1903 oop reflected = JNIHandles::resolve_non_null(method);
1904 oop mirror = NULL;
1905 int slot = 0;
1906
1907 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1908 mirror = java_lang_reflect_Constructor::clazz(reflected);
1909 slot = java_lang_reflect_Constructor::slot(reflected);
1910 } else {
1911 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1912 "wrong type");
1913 mirror = java_lang_reflect_Method::clazz(reflected);
1914 slot = java_lang_reflect_Method::slot(reflected);
1915 }
1916 Klass* k = java_lang_Class::as_Klass(mirror);
1917
1918 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1919 assert(m != NULL, "cannot find method");
1920 return m; // caller has to deal with NULL in product mode
1921 }
1922
1923
1924 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1925 JVMWrapper("JVM_GetMethodAnnotations");
1926
1927 // method is a handle to a java.lang.reflect.Method object
1928 Method* m = jvm_get_method_common(method);
1929 if (m == NULL) {
1930 return NULL;
1931 }
1932
1933 return (jbyteArray) JNIHandles::make_local(env,
1934 Annotations::make_java_array(m->annotations(), THREAD));
1935 JVM_END
1936
1937
1938 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1939 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1940
1941 // method is a handle to a java.lang.reflect.Method object
1942 Method* m = jvm_get_method_common(method);
1943 if (m == NULL) {
1944 return NULL;
1945 }
1946
1947 return (jbyteArray) JNIHandles::make_local(env,
1948 Annotations::make_java_array(m->annotation_default(), THREAD));
1949 JVM_END
1950
1951
1952 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1953 JVMWrapper("JVM_GetMethodParameterAnnotations");
1954
1955 // method is a handle to a java.lang.reflect.Method object
1956 Method* m = jvm_get_method_common(method);
1957 if (m == NULL) {
1958 return NULL;
1959 }
1960
1961 return (jbyteArray) JNIHandles::make_local(env,
1962 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1963 JVM_END
1964
1965 /* Type use annotations support (JDK 1.8) */
1966
1967 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1968 assert (cls != NULL, "illegal class");
1969 JVMWrapper("JVM_GetClassTypeAnnotations");
1970 ResourceMark rm(THREAD);
1971 // Return null for arrays and primitives
1972 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1973 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1974 if (k->oop_is_instance()) {
1975 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1976 if (type_annotations != NULL) {
1977 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1978 return (jbyteArray) JNIHandles::make_local(env, a);
1979 }
1980 }
1981 }
1982 return NULL;
1983 JVM_END
1984
1985 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1986 assert (method != NULL, "illegal method");
1987 JVMWrapper("JVM_GetMethodTypeAnnotations");
1988
1989 // method is a handle to a java.lang.reflect.Method object
1990 Method* m = jvm_get_method_common(method);
1991 if (m == NULL) {
1992 return NULL;
1993 }
1994
1995 AnnotationArray* type_annotations = m->type_annotations();
1996 if (type_annotations != NULL) {
1997 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1998 return (jbyteArray) JNIHandles::make_local(env, a);
1999 }
2000
2001 return NULL;
2002 JVM_END
2003
2004 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
2005 assert (field != NULL, "illegal field");
2006 JVMWrapper("JVM_GetFieldTypeAnnotations");
2007
2008 fieldDescriptor fd;
2009 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
2010 if (!gotFd) {
2011 return NULL;
2012 }
2013
2014 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
2015 JVM_END
2016
2017 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
2018 if (!cp->is_within_bounds(index)) {
2019 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
2020 }
2021 }
2022
2023 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
2024 {
2025 JVMWrapper("JVM_GetMethodParameters");
2026 // method is a handle to a java.lang.reflect.Method object
2027 Method* method_ptr = jvm_get_method_common(method);
2028 methodHandle mh (THREAD, method_ptr);
2029 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
2030 const int num_params = mh->method_parameters_length();
2031
2032 if (0 != num_params) {
2033 // make sure all the symbols are properly formatted
2034 for (int i = 0; i < num_params; i++) {
2035 MethodParametersElement* params = mh->method_parameters_start();
2036 int index = params[i].name_cp_index;
2037 bounds_check(mh->constants(), index, CHECK_NULL);
2038
2039 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
2040 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
2041 "Wrong type at constant pool index");
2042 }
2043
2044 }
2045
2046 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
2047 objArrayHandle result (THREAD, result_oop);
2048
2049 for (int i = 0; i < num_params; i++) {
2050 MethodParametersElement* params = mh->method_parameters_start();
2051 // For a 0 index, give a NULL symbol
2052 Symbol* sym = 0 != params[i].name_cp_index ?
2053 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
2054 int flags = params[i].flags;
2055 oop param = Reflection::new_parameter(reflected_method, i, sym,
2056 flags, CHECK_NULL);
2057 result->obj_at_put(i, param);
2058 }
2059 return (jobjectArray)JNIHandles::make_local(env, result());
2060 } else {
2061 return (jobjectArray)NULL;
2062 }
2063 }
2064 JVM_END
2065
2066 // New (JDK 1.4) reflection implementation /////////////////////////////////////
2067
2068 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2069 {
2070 JVMWrapper("JVM_GetClassDeclaredFields");
2071 JvmtiVMObjectAllocEventCollector oam;
2072
2073 // Exclude primitive types and array types
2074 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
2075 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2076 // Return empty array
2077 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
2078 return (jobjectArray) JNIHandles::make_local(env, res);
2079 }
2080
2081 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2082 constantPoolHandle cp(THREAD, k->constants());
2083
2084 // Ensure class is linked
2085 k->link_class(CHECK_NULL);
2086
2087 // 4496456 We need to filter out java.lang.Throwable.backtrace
2088 bool skip_backtrace = false;
2089
2090 // Allocate result
2091 int num_fields;
2092
2093 if (publicOnly) {
2094 num_fields = 0;
2095 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
2096 if (fs.access_flags().is_public()) ++num_fields;
2097 }
2098 } else {
2099 num_fields = k->java_fields_count();
2100
2101 if (k() == SystemDictionary::Throwable_klass()) {
2102 num_fields--;
2103 skip_backtrace = true;
2104 }
2105 }
2106
2107 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
2108 objArrayHandle result (THREAD, r);
2109
2110 int out_idx = 0;
2111 fieldDescriptor fd;
2112 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
2113 if (skip_backtrace) {
2114 // 4496456 skip java.lang.Throwable.backtrace
2115 int offset = fs.offset();
2116 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
2117 }
2118
2119 if (!publicOnly || fs.access_flags().is_public()) {
2120 fd.reinitialize(k(), fs.index());
2121 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
2122 result->obj_at_put(out_idx, field);
2123 ++out_idx;
2124 }
2125 }
2126 assert(out_idx == num_fields, "just checking");
2127 return (jobjectArray) JNIHandles::make_local(env, result());
2128 }
2129 JVM_END
2130
2131 static bool select_method(methodHandle method, bool want_constructor) {
2132 if (want_constructor) {
2133 return (method->is_initializer() && !method->is_static());
2134 } else {
2135 return (!method->is_initializer() && !method->is_overpass());
2136 }
2137 }
2138
2139 static jobjectArray get_class_declared_methods_helper(
2140 JNIEnv *env,
2141 jclass ofClass, jboolean publicOnly,
2142 bool want_constructor,
2143 Klass* klass, TRAPS) {
2144
2145 JvmtiVMObjectAllocEventCollector oam;
2146
2147 // Exclude primitive types and array types
2148 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
2149 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
2150 // Return empty array
2151 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
2152 return (jobjectArray) JNIHandles::make_local(env, res);
2153 }
2154
2155 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2156
2157 // Ensure class is linked
2158 k->link_class(CHECK_NULL);
2159
2160 Array<Method*>* methods = k->methods();
2161 int methods_length = methods->length();
2162
2163 // Save original method_idnum in case of redefinition, which can change
2164 // the idnum of obsolete methods. The new method will have the same idnum
2165 // but if we refresh the methods array, the counts will be wrong.
2166 ResourceMark rm(THREAD);
2167 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2168 int num_methods = 0;
2169
2170 for (int i = 0; i < methods_length; i++) {
2171 methodHandle method(THREAD, methods->at(i));
2172 if (select_method(method, want_constructor)) {
2173 if (!publicOnly || method->is_public()) {
2174 idnums->push(method->method_idnum());
2175 ++num_methods;
2176 }
2177 }
2178 }
2179
2180 // Allocate result
2181 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2182 objArrayHandle result (THREAD, r);
2183
2184 // Now just put the methods that we selected above, but go by their idnum
2185 // in case of redefinition. The methods can be redefined at any safepoint,
2186 // so above when allocating the oop array and below when creating reflect
2187 // objects.
2188 for (int i = 0; i < num_methods; i++) {
2189 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2190 if (method.is_null()) {
2191 // Method may have been deleted and seems this API can handle null
2192 // Otherwise should probably put a method that throws NSME
2193 result->obj_at_put(i, NULL);
2194 } else {
2195 oop m;
2196 if (want_constructor) {
2197 m = Reflection::new_constructor(method, CHECK_NULL);
2198 } else {
2199 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2200 }
2201 result->obj_at_put(i, m);
2202 }
2203 }
2204
2205 return (jobjectArray) JNIHandles::make_local(env, result());
2206 }
2207
2208 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2209 {
2210 JVMWrapper("JVM_GetClassDeclaredMethods");
2211 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2212 /*want_constructor*/ false,
2213 SystemDictionary::reflect_Method_klass(), THREAD);
2214 }
2215 JVM_END
2216
2217 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2218 {
2219 JVMWrapper("JVM_GetClassDeclaredConstructors");
2220 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2221 /*want_constructor*/ true,
2222 SystemDictionary::reflect_Constructor_klass(), THREAD);
2223 }
2224 JVM_END
2225
2226 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2227 {
2228 JVMWrapper("JVM_GetClassAccessFlags");
2229 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2230 // Primitive type
2231 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2232 }
2233
2234 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2235 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2236 }
2237 JVM_END
2238
2239
2240 // Constant pool access //////////////////////////////////////////////////////////
2241
2242 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2243 {
2244 JVMWrapper("JVM_GetClassConstantPool");
2245 JvmtiVMObjectAllocEventCollector oam;
2246
2247 // Return null for primitives and arrays
2248 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2249 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2250 if (k->oop_is_instance()) {
2251 instanceKlassHandle k_h(THREAD, k);
2252 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2253 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2254 return JNIHandles::make_local(jcp());
2255 }
2256 }
2257 return NULL;
2258 }
2259 JVM_END
2260
2261
2262 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2263 {
2264 JVMWrapper("JVM_ConstantPoolGetSize");
2265 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2266 return cp->length();
2267 }
2268 JVM_END
2269
2270
2271 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2272 {
2273 JVMWrapper("JVM_ConstantPoolGetClassAt");
2274 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2275 bounds_check(cp, index, CHECK_NULL);
2276 constantTag tag = cp->tag_at(index);
2277 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2278 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2279 }
2280 Klass* k = cp->klass_at(index, CHECK_NULL);
2281 return (jclass) JNIHandles::make_local(k->java_mirror());
2282 }
2283 JVM_END
2284
2285 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2286 {
2287 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2288 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2289 bounds_check(cp, index, CHECK_NULL);
2290 constantTag tag = cp->tag_at(index);
2291 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2292 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2293 }
2294 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2295 if (k == NULL) return NULL;
2296 return (jclass) JNIHandles::make_local(k->java_mirror());
2297 }
2298 JVM_END
2299
2300 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2301 constantTag tag = cp->tag_at(index);
2302 if (!tag.is_method() && !tag.is_interface_method()) {
2303 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2304 }
2305 int klass_ref = cp->uncached_klass_ref_index_at(index);
2306 Klass* k_o;
2307 if (force_resolution) {
2308 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2309 } else {
2310 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2311 if (k_o == NULL) return NULL;
2312 }
2313 instanceKlassHandle k(THREAD, k_o);
2314 Symbol* name = cp->uncached_name_ref_at(index);
2315 Symbol* sig = cp->uncached_signature_ref_at(index);
2316 methodHandle m (THREAD, k->find_method(name, sig));
2317 if (m.is_null()) {
2318 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2319 }
2320 oop method;
2321 if (!m->is_initializer() || m->is_static()) {
2322 method = Reflection::new_method(m, true, true, CHECK_NULL);
2323 } else {
2324 method = Reflection::new_constructor(m, CHECK_NULL);
2325 }
2326 return JNIHandles::make_local(method);
2327 }
2328
2329 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2330 {
2331 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2332 JvmtiVMObjectAllocEventCollector oam;
2333 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2334 bounds_check(cp, index, CHECK_NULL);
2335 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2336 return res;
2337 }
2338 JVM_END
2339
2340 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2341 {
2342 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2343 JvmtiVMObjectAllocEventCollector oam;
2344 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2345 bounds_check(cp, index, CHECK_NULL);
2346 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2347 return res;
2348 }
2349 JVM_END
2350
2351 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2352 constantTag tag = cp->tag_at(index);
2353 if (!tag.is_field()) {
2354 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2355 }
2356 int klass_ref = cp->uncached_klass_ref_index_at(index);
2357 Klass* k_o;
2358 if (force_resolution) {
2359 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2360 } else {
2361 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2362 if (k_o == NULL) return NULL;
2363 }
2364 instanceKlassHandle k(THREAD, k_o);
2365 Symbol* name = cp->uncached_name_ref_at(index);
2366 Symbol* sig = cp->uncached_signature_ref_at(index);
2367 fieldDescriptor fd;
2368 Klass* target_klass = k->find_field(name, sig, &fd);
2369 if (target_klass == NULL) {
2370 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2371 }
2372 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2373 return JNIHandles::make_local(field);
2374 }
2375
2376 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2377 {
2378 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2379 JvmtiVMObjectAllocEventCollector oam;
2380 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2381 bounds_check(cp, index, CHECK_NULL);
2382 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2383 return res;
2384 }
2385 JVM_END
2386
2387 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2388 {
2389 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2390 JvmtiVMObjectAllocEventCollector oam;
2391 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2392 bounds_check(cp, index, CHECK_NULL);
2393 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2394 return res;
2395 }
2396 JVM_END
2397
2398 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2399 {
2400 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2401 JvmtiVMObjectAllocEventCollector oam;
2402 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2403 bounds_check(cp, index, CHECK_NULL);
2404 constantTag tag = cp->tag_at(index);
2405 if (!tag.is_field_or_method()) {
2406 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2407 }
2408 int klass_ref = cp->uncached_klass_ref_index_at(index);
2409 Symbol* klass_name = cp->klass_name_at(klass_ref);
2410 Symbol* member_name = cp->uncached_name_ref_at(index);
2411 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2412 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2413 objArrayHandle dest(THREAD, dest_o);
2414 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2415 dest->obj_at_put(0, str());
2416 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2417 dest->obj_at_put(1, str());
2418 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2419 dest->obj_at_put(2, str());
2420 return (jobjectArray) JNIHandles::make_local(dest());
2421 }
2422 JVM_END
2423
2424 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2425 {
2426 JVMWrapper("JVM_ConstantPoolGetIntAt");
2427 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2428 bounds_check(cp, index, CHECK_0);
2429 constantTag tag = cp->tag_at(index);
2430 if (!tag.is_int()) {
2431 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2432 }
2433 return cp->int_at(index);
2434 }
2435 JVM_END
2436
2437 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2438 {
2439 JVMWrapper("JVM_ConstantPoolGetLongAt");
2440 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2441 bounds_check(cp, index, CHECK_(0L));
2442 constantTag tag = cp->tag_at(index);
2443 if (!tag.is_long()) {
2444 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2445 }
2446 return cp->long_at(index);
2447 }
2448 JVM_END
2449
2450 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2451 {
2452 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2453 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2454 bounds_check(cp, index, CHECK_(0.0f));
2455 constantTag tag = cp->tag_at(index);
2456 if (!tag.is_float()) {
2457 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2458 }
2459 return cp->float_at(index);
2460 }
2461 JVM_END
2462
2463 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2464 {
2465 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2466 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2467 bounds_check(cp, index, CHECK_(0.0));
2468 constantTag tag = cp->tag_at(index);
2469 if (!tag.is_double()) {
2470 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2471 }
2472 return cp->double_at(index);
2473 }
2474 JVM_END
2475
2476 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2477 {
2478 JVMWrapper("JVM_ConstantPoolGetStringAt");
2479 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2480 bounds_check(cp, index, CHECK_NULL);
2481 constantTag tag = cp->tag_at(index);
2482 if (!tag.is_string()) {
2483 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2484 }
2485 oop str = cp->string_at(index, CHECK_NULL);
2486 return (jstring) JNIHandles::make_local(str);
2487 }
2488 JVM_END
2489
2490 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2491 {
2492 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2493 JvmtiVMObjectAllocEventCollector oam;
2494 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2495 bounds_check(cp, index, CHECK_NULL);
2496 constantTag tag = cp->tag_at(index);
2497 if (!tag.is_symbol()) {
2498 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2499 }
2500 Symbol* sym = cp->symbol_at(index);
2501 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2502 return (jstring) JNIHandles::make_local(str());
2503 }
2504 JVM_END
2505
2506
2507 // Assertion support. //////////////////////////////////////////////////////////
2508
2509 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2510 JVMWrapper("JVM_DesiredAssertionStatus");
2511 assert(cls != NULL, "bad class");
2512
2513 oop r = JNIHandles::resolve(cls);
2514 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2515 if (java_lang_Class::is_primitive(r)) return false;
2516
2517 Klass* k = java_lang_Class::as_Klass(r);
2518 assert(k->oop_is_instance(), "must be an instance klass");
2519 if (! k->oop_is_instance()) return false;
2520
2521 ResourceMark rm(THREAD);
2522 const char* name = k->name()->as_C_string();
2523 bool system_class = k->class_loader() == NULL;
2524 return JavaAssertions::enabled(name, system_class);
2525
2526 JVM_END
2527
2528
2529 // Return a new AssertionStatusDirectives object with the fields filled in with
2530 // command-line assertion arguments (i.e., -ea, -da).
2531 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2532 JVMWrapper("JVM_AssertionStatusDirectives");
2533 JvmtiVMObjectAllocEventCollector oam;
2534 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2535 return JNIHandles::make_local(env, asd);
2536 JVM_END
2537
2538 // Verification ////////////////////////////////////////////////////////////////////////////////
2539
2540 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2541
2542 // RedefineClasses support: bug 6214132 caused verification to fail.
2543 // All functions from this section should call the jvmtiThreadSate function:
2544 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2545 // The function returns a Klass* of the _scratch_class if the verifier
2546 // was invoked in the middle of the class redefinition.
2547 // Otherwise it returns its argument value which is the _the_class Klass*.
2548 // Please, refer to the description in the jvmtiThreadSate.hpp.
2549
2550 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2551 JVMWrapper("JVM_GetClassNameUTF");
2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2553 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2554 return k->name()->as_utf8();
2555 JVM_END
2556
2557
2558 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2559 JVMWrapper("JVM_GetClassCPTypes");
2560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2561 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2562 // types will have length zero if this is not an InstanceKlass
2563 // (length is determined by call to JVM_GetClassCPEntriesCount)
2564 if (k->oop_is_instance()) {
2565 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2566 for (int index = cp->length() - 1; index >= 0; index--) {
2567 constantTag tag = cp->tag_at(index);
2568 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2569 }
2570 }
2571 JVM_END
2572
2573
2574 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2575 JVMWrapper("JVM_GetClassCPEntriesCount");
2576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2577 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2578 if (!k->oop_is_instance())
2579 return 0;
2580 return InstanceKlass::cast(k)->constants()->length();
2581 JVM_END
2582
2583
2584 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2585 JVMWrapper("JVM_GetClassFieldsCount");
2586 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2587 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2588 if (!k->oop_is_instance())
2589 return 0;
2590 return InstanceKlass::cast(k)->java_fields_count();
2591 JVM_END
2592
2593
2594 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2595 JVMWrapper("JVM_GetClassMethodsCount");
2596 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2597 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2598 if (!k->oop_is_instance())
2599 return 0;
2600 return InstanceKlass::cast(k)->methods()->length();
2601 JVM_END
2602
2603
2604 // The following methods, used for the verifier, are never called with
2605 // array klasses, so a direct cast to InstanceKlass is safe.
2606 // Typically, these methods are called in a loop with bounds determined
2607 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2608 // zero for arrays.
2609 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2610 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2614 int length = method->checked_exceptions_length();
2615 if (length > 0) {
2616 CheckedExceptionElement* table= method->checked_exceptions_start();
2617 for (int i = 0; i < length; i++) {
2618 exceptions[i] = table[i].class_cp_index;
2619 }
2620 }
2621 JVM_END
2622
2623
2624 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2625 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2626 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2627 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2628 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2629 return method->checked_exceptions_length();
2630 JVM_END
2631
2632
2633 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2634 JVMWrapper("JVM_GetMethodIxByteCode");
2635 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2636 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2637 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2638 memcpy(code, method->code_base(), method->code_size());
2639 JVM_END
2640
2641
2642 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2643 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2644 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2645 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2646 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2647 return method->code_size();
2648 JVM_END
2649
2650
2651 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2652 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2653 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2654 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2655 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2656 ExceptionTable extable(method);
2657 entry->start_pc = extable.start_pc(entry_index);
2658 entry->end_pc = extable.end_pc(entry_index);
2659 entry->handler_pc = extable.handler_pc(entry_index);
2660 entry->catchType = extable.catch_type_index(entry_index);
2661 JVM_END
2662
2663
2664 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2665 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2666 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2667 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2668 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2669 return method->exception_table_length();
2670 JVM_END
2671
2672
2673 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2674 JVMWrapper("JVM_GetMethodIxModifiers");
2675 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2676 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2677 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2678 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2679 JVM_END
2680
2681
2682 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2683 JVMWrapper("JVM_GetFieldIxModifiers");
2684 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2685 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2686 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2687 JVM_END
2688
2689
2690 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2691 JVMWrapper("JVM_GetMethodIxLocalsCount");
2692 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2693 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2694 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2695 return method->max_locals();
2696 JVM_END
2697
2698
2699 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2700 JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2705 JVM_END
2706
2707
2708 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2709 JVMWrapper("JVM_GetMethodIxMaxStack");
2710 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2711 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2712 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2713 return method->verifier_max_stack();
2714 JVM_END
2715
2716
2717 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2718 JVMWrapper("JVM_IsConstructorIx");
2719 ResourceMark rm(THREAD);
2720 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2721 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2722 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2723 return method->name() == vmSymbols::object_initializer_name();
2724 JVM_END
2725
2726
2727 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2728 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2729 ResourceMark rm(THREAD);
2730 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2731 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2732 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2733 return method->is_overpass();
2734 JVM_END
2735
2736 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2737 JVMWrapper("JVM_GetMethodIxIxUTF");
2738 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2739 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2740 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2741 return method->name()->as_utf8();
2742 JVM_END
2743
2744
2745 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2746 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2747 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2748 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2749 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2750 return method->signature()->as_utf8();
2751 JVM_END
2752
2753 /**
2754 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2755 * read entries in the constant pool. Since the old verifier always
2756 * works on a copy of the code, it will not see any rewriting that
2757 * may possibly occur in the middle of verification. So it is important
2758 * that nothing it calls tries to use the cpCache instead of the raw
2759 * constant pool, so we must use cp->uncached_x methods when appropriate.
2760 */
2761 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2762 JVMWrapper("JVM_GetCPFieldNameUTF");
2763 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2764 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2765 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2766 switch (cp->tag_at(cp_index).value()) {
2767 case JVM_CONSTANT_Fieldref:
2768 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2769 default:
2770 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2771 }
2772 ShouldNotReachHere();
2773 return NULL;
2774 JVM_END
2775
2776
2777 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2778 JVMWrapper("JVM_GetCPMethodNameUTF");
2779 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2780 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2781 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2782 switch (cp->tag_at(cp_index).value()) {
2783 case JVM_CONSTANT_InterfaceMethodref:
2784 case JVM_CONSTANT_Methodref:
2785 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2786 default:
2787 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2788 }
2789 ShouldNotReachHere();
2790 return NULL;
2791 JVM_END
2792
2793
2794 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2795 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2796 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2797 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2798 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2799 switch (cp->tag_at(cp_index).value()) {
2800 case JVM_CONSTANT_InterfaceMethodref:
2801 case JVM_CONSTANT_Methodref:
2802 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2803 default:
2804 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2805 }
2806 ShouldNotReachHere();
2807 return NULL;
2808 JVM_END
2809
2810
2811 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2812 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2813 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2814 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2815 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2816 switch (cp->tag_at(cp_index).value()) {
2817 case JVM_CONSTANT_Fieldref:
2818 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2819 default:
2820 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2821 }
2822 ShouldNotReachHere();
2823 return NULL;
2824 JVM_END
2825
2826
2827 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2828 JVMWrapper("JVM_GetCPClassNameUTF");
2829 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2830 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2831 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2832 Symbol* classname = cp->klass_name_at(cp_index);
2833 return classname->as_utf8();
2834 JVM_END
2835
2836
2837 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2838 JVMWrapper("JVM_GetCPFieldClassNameUTF");
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_Fieldref: {
2844 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2845 Symbol* classname = cp->klass_name_at(class_index);
2846 return classname->as_utf8();
2847 }
2848 default:
2849 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2850 }
2851 ShouldNotReachHere();
2852 return NULL;
2853 JVM_END
2854
2855
2856 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2857 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2858 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2859 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2860 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2861 switch (cp->tag_at(cp_index).value()) {
2862 case JVM_CONSTANT_Methodref:
2863 case JVM_CONSTANT_InterfaceMethodref: {
2864 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2865 Symbol* classname = cp->klass_name_at(class_index);
2866 return classname->as_utf8();
2867 }
2868 default:
2869 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2870 }
2871 ShouldNotReachHere();
2872 return NULL;
2873 JVM_END
2874
2875
2876 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2877 JVMWrapper("JVM_GetCPFieldModifiers");
2878 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2879 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2880 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2881 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2882 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2883 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2884 switch (cp->tag_at(cp_index).value()) {
2885 case JVM_CONSTANT_Fieldref: {
2886 Symbol* name = cp->uncached_name_ref_at(cp_index);
2887 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2888 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2889 if (fs.name() == name && fs.signature() == signature) {
2890 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2891 }
2892 }
2893 return -1;
2894 }
2895 default:
2896 fatal("JVM_GetCPFieldModifiers: illegal constant");
2897 }
2898 ShouldNotReachHere();
2899 return 0;
2900 JVM_END
2901
2902
2903 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2904 JVMWrapper("JVM_GetCPMethodModifiers");
2905 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2906 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2907 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2908 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2909 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2910 switch (cp->tag_at(cp_index).value()) {
2911 case JVM_CONSTANT_Methodref:
2912 case JVM_CONSTANT_InterfaceMethodref: {
2913 Symbol* name = cp->uncached_name_ref_at(cp_index);
2914 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2915 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2916 int methods_count = methods->length();
2917 for (int i = 0; i < methods_count; i++) {
2918 Method* method = methods->at(i);
2919 if (method->name() == name && method->signature() == signature) {
2920 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2921 }
2922 }
2923 return -1;
2924 }
2925 default:
2926 fatal("JVM_GetCPMethodModifiers: illegal constant");
2927 }
2928 ShouldNotReachHere();
2929 return 0;
2930 JVM_END
2931
2932
2933 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2934
2935 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2936 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2937 JVM_END
2938
2939
2940 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2941 JVMWrapper("JVM_IsSameClassPackage");
2942 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2943 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2944 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2945 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2946 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2947 JVM_END
2948
2949
2950 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2951
2952 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2953 JVMWrapper2("JVM_Open (%s)", fname);
2954
2955 //%note jvm_r6
2956 int result = os::open(fname, flags, mode);
2957 if (result >= 0) {
2958 return result;
2959 } else {
2960 switch(errno) {
2961 case EEXIST:
2962 return JVM_EEXIST;
2963 default:
2964 return -1;
2965 }
2966 }
2967 JVM_END
2968
2969
2970 JVM_LEAF(jint, JVM_Close(jint fd))
2971 JVMWrapper2("JVM_Close (0x%x)", fd);
2972 //%note jvm_r6
2973 return os::close(fd);
2974 JVM_END
2975
2976
2977 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2978 JVMWrapper2("JVM_Read (0x%x)", fd);
2979
2980 //%note jvm_r6
2981 return (jint)os::restartable_read(fd, buf, nbytes);
2982 JVM_END
2983
2984
2985 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2986 JVMWrapper2("JVM_Write (0x%x)", fd);
2987
2988 //%note jvm_r6
2989 return (jint)os::write(fd, buf, nbytes);
2990 JVM_END
2991
2992
2993 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2994 JVMWrapper2("JVM_Available (0x%x)", fd);
2995 //%note jvm_r6
2996 return os::available(fd, pbytes);
2997 JVM_END
2998
2999
3000 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
3001 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
3002 //%note jvm_r6
3003 return os::lseek(fd, offset, whence);
3004 JVM_END
3005
3006
3007 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
3008 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
3009 return os::ftruncate(fd, length);
3010 JVM_END
3011
3012
3013 JVM_LEAF(jint, JVM_Sync(jint fd))
3014 JVMWrapper2("JVM_Sync (0x%x)", fd);
3015 //%note jvm_r6
3016 return os::fsync(fd);
3017 JVM_END
3018
3019
3020 // Printing support //////////////////////////////////////////////////
3021 extern "C" {
3022
3023 ATTRIBUTE_PRINTF(3, 0)
3024 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
3025 // Reject count values that are negative signed values converted to
3026 // unsigned; see bug 4399518, 4417214
3027 if ((intptr_t)count <= 0) return -1;
3028
3029 int result = os::vsnprintf(str, count, fmt, args);
3030 if (result > 0 && (size_t)result >= count) {
3031 result = -1;
3032 }
3033
3034 return result;
3035 }
3036
3037 ATTRIBUTE_PRINTF(3, 0)
3038 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
3039 va_list args;
3040 int len;
3041 va_start(args, fmt);
3042 len = jio_vsnprintf(str, count, fmt, args);
3043 va_end(args);
3044 return len;
3045 }
3046
3047 ATTRIBUTE_PRINTF(2,3)
3048 int jio_fprintf(FILE* f, const char *fmt, ...) {
3049 int len;
3050 va_list args;
3051 va_start(args, fmt);
3052 len = jio_vfprintf(f, fmt, args);
3053 va_end(args);
3054 return len;
3055 }
3056
3057 ATTRIBUTE_PRINTF(2, 0)
3058 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
3059 if (Arguments::vfprintf_hook() != NULL) {
3060 return Arguments::vfprintf_hook()(f, fmt, args);
3061 } else {
3062 return vfprintf(f, fmt, args);
3063 }
3064 }
3065
3066 ATTRIBUTE_PRINTF(1, 2)
3067 JNIEXPORT int jio_printf(const char *fmt, ...) {
3068 int len;
3069 va_list args;
3070 va_start(args, fmt);
3071 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
3072 va_end(args);
3073 return len;
3074 }
3075
3076
3077 // HotSpot specific jio method
3078 void jio_print(const char* s) {
3079 // Try to make this function as atomic as possible.
3080 if (Arguments::vfprintf_hook() != NULL) {
3081 jio_fprintf(defaultStream::output_stream(), "%s", s);
3082 } else {
3083 // Make an unused local variable to avoid warning from gcc 4.x compiler.
3084 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
3085 }
3086 }
3087
3088 } // Extern C
3089
3090 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
3091
3092 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
3093 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
3094 // OSThread objects. The exception to this rule is when the target object is the thread
3095 // doing the operation, in which case we know that the thread won't exit until the
3096 // operation is done (all exits being voluntary). There are a few cases where it is
3097 // rather silly to do operations on yourself, like resuming yourself or asking whether
3098 // you are alive. While these can still happen, they are not subject to deadlocks if
3099 // the lock is held while the operation occurs (this is not the case for suspend, for
3100 // instance), and are very unlikely. Because IsAlive needs to be fast and its
3101 // implementation is local to this file, we always lock Threads_lock for that one.
3102
3103 static void thread_entry(JavaThread* thread, TRAPS) {
3104 HandleMark hm(THREAD);
3105 Handle obj(THREAD, thread->threadObj());
3106 JavaValue result(T_VOID);
3107 JavaCalls::call_virtual(&result,
3108 obj,
3109 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
3110 vmSymbols::run_method_name(),
3111 vmSymbols::void_method_signature(),
3112 THREAD);
3113 }
3114
3115
3116 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
3117 JVMWrapper("JVM_StartThread");
3118 JavaThread *native_thread = NULL;
3119
3120 // We cannot hold the Threads_lock when we throw an exception,
3121 // due to rank ordering issues. Example: we might need to grab the
3122 // Heap_lock while we construct the exception.
3123 bool throw_illegal_thread_state = false;
3124
3125 // We must release the Threads_lock before we can post a jvmti event
3126 // in Thread::start.
3127 {
3128 // Ensure that the C++ Thread and OSThread structures aren't freed before
3129 // we operate.
3130 MutexLocker mu(Threads_lock);
3131
3132 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
3133 // re-starting an already started thread, so we should usually find
3134 // that the JavaThread is null. However for a JNI attached thread
3135 // there is a small window between the Thread object being created
3136 // (with its JavaThread set) and the update to its threadStatus, so we
3137 // have to check for this
3138 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
3139 throw_illegal_thread_state = true;
3140 } else {
3141 // We could also check the stillborn flag to see if this thread was already stopped, but
3142 // for historical reasons we let the thread detect that itself when it starts running
3143
3144 jlong size =
3145 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
3146 // Allocate the C++ Thread structure and create the native thread. The
3147 // stack size retrieved from java is signed, but the constructor takes
3148 // size_t (an unsigned type), so avoid passing negative values which would
3149 // result in really large stacks.
3150 size_t sz = size > 0 ? (size_t) size : 0;
3151 native_thread = new JavaThread(&thread_entry, sz);
3152
3153 // At this point it may be possible that no osthread was created for the
3154 // JavaThread due to lack of memory. Check for this situation and throw
3155 // an exception if necessary. Eventually we may want to change this so
3156 // that we only grab the lock if the thread was created successfully -
3157 // then we can also do this check and throw the exception in the
3158 // JavaThread constructor.
3159 if (native_thread->osthread() != NULL) {
3160 // Note: the current thread is not being used within "prepare".
3161 native_thread->prepare(jthread);
3162 }
3163 }
3164 }
3165
3166 if (throw_illegal_thread_state) {
3167 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3168 }
3169
3170 assert(native_thread != NULL, "Starting null thread?");
3171
3172 if (native_thread->osthread() == NULL) {
3173 // No one should hold a reference to the 'native_thread'.
3174 delete native_thread;
3175 if (JvmtiExport::should_post_resource_exhausted()) {
3176 JvmtiExport::post_resource_exhausted(
3177 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3178 "unable to create new native thread");
3179 }
3180 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3181 "unable to create new native thread");
3182 }
3183
3184 Thread::start(native_thread);
3185
3186 JVM_END
3187
3188 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3189 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3190 // but is thought to be reliable and simple. In the case, where the receiver is the
3191 // same thread as the sender, no safepoint is needed.
3192 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3193 JVMWrapper("JVM_StopThread");
3194
3195 oop java_throwable = JNIHandles::resolve(throwable);
3196 if (java_throwable == NULL) {
3197 THROW(vmSymbols::java_lang_NullPointerException());
3198 }
3199 oop java_thread = JNIHandles::resolve_non_null(jthread);
3200 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3201 Events::log_exception(JavaThread::current(),
3202 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3203 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3204 // First check if thread is alive
3205 if (receiver != NULL) {
3206 // Check if exception is getting thrown at self (use oop equality, since the
3207 // target object might exit)
3208 if (java_thread == thread->threadObj()) {
3209 THROW_OOP(java_throwable);
3210 } else {
3211 // Enques a VM_Operation to stop all threads and then deliver the exception...
3212 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3213 }
3214 }
3215 else {
3216 // Either:
3217 // - target thread has not been started before being stopped, or
3218 // - target thread already terminated
3219 // We could read the threadStatus to determine which case it is
3220 // but that is overkill as it doesn't matter. We must set the
3221 // stillborn flag for the first case, and if the thread has already
3222 // exited setting this flag has no affect
3223 java_lang_Thread::set_stillborn(java_thread);
3224 }
3225 JVM_END
3226
3227
3228 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3229 JVMWrapper("JVM_IsThreadAlive");
3230
3231 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3232 return java_lang_Thread::is_alive(thread_oop);
3233 JVM_END
3234
3235
3236 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3237 JVMWrapper("JVM_SuspendThread");
3238 oop java_thread = JNIHandles::resolve_non_null(jthread);
3239 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3240
3241 if (receiver != NULL) {
3242 // thread has run and has not exited (still on threads list)
3243
3244 {
3245 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3246 if (receiver->is_external_suspend()) {
3247 // Don't allow nested external suspend requests. We can't return
3248 // an error from this interface so just ignore the problem.
3249 return;
3250 }
3251 if (receiver->is_exiting()) { // thread is in the process of exiting
3252 return;
3253 }
3254 receiver->set_external_suspend();
3255 }
3256
3257 // java_suspend() will catch threads in the process of exiting
3258 // and will ignore them.
3259 receiver->java_suspend();
3260
3261 // It would be nice to have the following assertion in all the
3262 // time, but it is possible for a racing resume request to have
3263 // resumed this thread right after we suspended it. Temporarily
3264 // enable this assertion if you are chasing a different kind of
3265 // bug.
3266 //
3267 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3268 // receiver->is_being_ext_suspended(), "thread is not suspended");
3269 }
3270 JVM_END
3271
3272
3273 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3274 JVMWrapper("JVM_ResumeThread");
3275 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3276 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3277 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3278 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3279 // looks at it.
3280 MutexLocker ml(Threads_lock);
3281 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3282 if (thr != NULL) {
3283 // the thread has run and is not in the process of exiting
3284 thr->java_resume();
3285 }
3286 JVM_END
3287
3288
3289 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3290 JVMWrapper("JVM_SetThreadPriority");
3291 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3292 MutexLocker ml(Threads_lock);
3293 oop java_thread = JNIHandles::resolve_non_null(jthread);
3294 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3295 JavaThread* thr = java_lang_Thread::thread(java_thread);
3296 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3297 Thread::set_priority(thr, (ThreadPriority)prio);
3298 }
3299 JVM_END
3300
3301
3302 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3303 JVMWrapper("JVM_Yield");
3304 if (os::dont_yield()) return;
3305 #ifndef USDT2
3306 HS_DTRACE_PROBE0(hotspot, thread__yield);
3307 #else /* USDT2 */
3308 HOTSPOT_THREAD_YIELD();
3309 #endif /* USDT2 */
3310 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3311 // Critical for similar threading behaviour
3312 if (ConvertYieldToSleep) {
3313 os::sleep(thread, MinSleepInterval, false);
3314 } else {
3315 os::yield();
3316 }
3317 JVM_END
3318
3319 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3320 assert(event != NULL, "invariant");
3321 assert(event->should_commit(), "invariant");
3322 event->set_time(millis);
3323 event->commit();
3324 }
3325
3326 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3327 JVMWrapper("JVM_Sleep");
3328
3329 if (millis < 0) {
3330 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3331 }
3332
3333 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3334 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3335 }
3336
3337 // Save current thread state and restore it at the end of this block.
3338 // And set new thread state to SLEEPING.
3339 JavaThreadSleepState jtss(thread);
3340
3341 #ifndef USDT2
3342 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3343 #else /* USDT2 */
3344 HOTSPOT_THREAD_SLEEP_BEGIN(
3345 millis);
3346 #endif /* USDT2 */
3347
3348 EventThreadSleep event;
3349
3350 if (millis == 0) {
3351 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3352 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3353 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3354 // for SOLARIS
3355 if (ConvertSleepToYield) {
3356 os::yield();
3357 } else {
3358 ThreadState old_state = thread->osthread()->get_state();
3359 thread->osthread()->set_state(SLEEPING);
3360 os::sleep(thread, MinSleepInterval, false);
3361 thread->osthread()->set_state(old_state);
3362 }
3363 } else {
3364 ThreadState old_state = thread->osthread()->get_state();
3365 thread->osthread()->set_state(SLEEPING);
3366 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3367 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3368 // us while we were sleeping. We do not overwrite those.
3369 if (!HAS_PENDING_EXCEPTION) {
3370 if (event.should_commit()) {
3371 post_thread_sleep_event(&event, millis);
3372 }
3373 #ifndef USDT2
3374 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3375 #else /* USDT2 */
3376 HOTSPOT_THREAD_SLEEP_END(
3377 1);
3378 #endif /* USDT2 */
3379 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3380 // to properly restore the thread state. That's likely wrong.
3381 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3382 }
3383 }
3384 thread->osthread()->set_state(old_state);
3385 }
3386 if (event.should_commit()) {
3387 post_thread_sleep_event(&event, millis);
3388 }
3389 #ifndef USDT2
3390 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3391 #else /* USDT2 */
3392 HOTSPOT_THREAD_SLEEP_END(
3393 0);
3394 #endif /* USDT2 */
3395 JVM_END
3396
3397 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3398 JVMWrapper("JVM_CurrentThread");
3399 oop jthread = thread->threadObj();
3400 assert (thread != NULL, "no current thread!");
3401 return JNIHandles::make_local(env, jthread);
3402 JVM_END
3403
3404
3405 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3406 JVMWrapper("JVM_CountStackFrames");
3407
3408 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3409 oop java_thread = JNIHandles::resolve_non_null(jthread);
3410 bool throw_illegal_thread_state = false;
3411 int count = 0;
3412
3413 {
3414 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3415 // We need to re-resolve the java_thread, since a GC might have happened during the
3416 // acquire of the lock
3417 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3418
3419 if (thr == NULL) {
3420 // do nothing
3421 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3422 // Check whether this java thread has been suspended already. If not, throws
3423 // IllegalThreadStateException. We defer to throw that exception until
3424 // Threads_lock is released since loading exception class has to leave VM.
3425 // The correct way to test a thread is actually suspended is
3426 // wait_for_ext_suspend_completion(), but we can't call that while holding
3427 // the Threads_lock. The above tests are sufficient for our purposes
3428 // provided the walkability of the stack is stable - which it isn't
3429 // 100% but close enough for most practical purposes.
3430 throw_illegal_thread_state = true;
3431 } else {
3432 // Count all java activation, i.e., number of vframes
3433 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3434 // Native frames are not counted
3435 if (!vfst.method()->is_native()) count++;
3436 }
3437 }
3438 }
3439
3440 if (throw_illegal_thread_state) {
3441 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3442 "this thread is not suspended");
3443 }
3444 return count;
3445 JVM_END
3446
3447 // Consider: A better way to implement JVM_Interrupt() is to acquire
3448 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3449 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3450 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3451 // outside the critical section. Threads_lock is hot so we want to minimize
3452 // the hold-time. A cleaner interface would be to decompose interrupt into
3453 // two steps. The 1st phase, performed under Threads_lock, would return
3454 // a closure that'd be invoked after Threads_lock was dropped.
3455 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3456 // admit spurious wakeups.
3457
3458 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3459 JVMWrapper("JVM_Interrupt");
3460
3461 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3462 oop java_thread = JNIHandles::resolve_non_null(jthread);
3463 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3464 // We need to re-resolve the java_thread, since a GC might have happened during the
3465 // acquire of the lock
3466 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3467 if (thr != NULL) {
3468 Thread::interrupt(thr);
3469 }
3470 JVM_END
3471
3472
3473 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3474 JVMWrapper("JVM_IsInterrupted");
3475
3476 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3477 oop java_thread = JNIHandles::resolve_non_null(jthread);
3478 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3479 // We need to re-resolve the java_thread, since a GC might have happened during the
3480 // acquire of the lock
3481 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3482 if (thr == NULL) {
3483 return JNI_FALSE;
3484 } else {
3485 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3486 }
3487 JVM_END
3488
3489
3490 // Return true iff the current thread has locked the object passed in
3491
3492 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3493 JVMWrapper("JVM_HoldsLock");
3494 assert(THREAD->is_Java_thread(), "sanity check");
3495 if (obj == NULL) {
3496 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3497 }
3498 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3499 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3500 JVM_END
3501
3502
3503 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3504 JVMWrapper("JVM_DumpAllStacks");
3505 VM_PrintThreads op;
3506 VMThread::execute(&op);
3507 if (JvmtiExport::should_post_data_dump()) {
3508 JvmtiExport::post_data_dump();
3509 }
3510 JVM_END
3511
3512 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3513 JVMWrapper("JVM_SetNativeThreadName");
3514 ResourceMark rm(THREAD);
3515 oop java_thread = JNIHandles::resolve_non_null(jthread);
3516 JavaThread* thr = java_lang_Thread::thread(java_thread);
3517 // Thread naming only supported for the current thread, doesn't work for
3518 // target threads.
3519 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3520 // we don't set the name of an attached thread to avoid stepping
3521 // on other programs
3522 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3523 os::set_native_thread_name(thread_name);
3524 }
3525 JVM_END
3526
3527 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3528
3529 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3530 assert(jthread->is_Java_thread(), "must be a Java thread");
3531 if (jthread->privileged_stack_top() == NULL) return false;
3532 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3533 oop loader = jthread->privileged_stack_top()->class_loader();
3534 if (loader == NULL) return true;
3535 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3536 if (trusted) return true;
3537 }
3538 return false;
3539 }
3540
3541 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3542 JVMWrapper("JVM_CurrentLoadedClass");
3543 ResourceMark rm(THREAD);
3544
3545 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3546 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3547 bool trusted = is_trusted_frame(thread, &vfst);
3548 if (trusted) return NULL;
3549
3550 Method* m = vfst.method();
3551 if (!m->is_native()) {
3552 InstanceKlass* holder = m->method_holder();
3553 oop loader = holder->class_loader();
3554 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3555 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3556 }
3557 }
3558 }
3559 return NULL;
3560 JVM_END
3561
3562
3563 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3564 JVMWrapper("JVM_CurrentClassLoader");
3565 ResourceMark rm(THREAD);
3566
3567 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3568
3569 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3570 bool trusted = is_trusted_frame(thread, &vfst);
3571 if (trusted) return NULL;
3572
3573 Method* m = vfst.method();
3574 if (!m->is_native()) {
3575 InstanceKlass* holder = m->method_holder();
3576 assert(holder->is_klass(), "just checking");
3577 oop loader = holder->class_loader();
3578 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3579 return JNIHandles::make_local(env, loader);
3580 }
3581 }
3582 }
3583 return NULL;
3584 JVM_END
3585
3586
3587 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3588 JVMWrapper("JVM_GetClassContext");
3589 ResourceMark rm(THREAD);
3590 JvmtiVMObjectAllocEventCollector oam;
3591 vframeStream vfst(thread);
3592
3593 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3594 // This must only be called from SecurityManager.getClassContext
3595 Method* m = vfst.method();
3596 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3597 m->name() == vmSymbols::getClassContext_name() &&
3598 m->signature() == vmSymbols::void_class_array_signature())) {
3599 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3600 }
3601 }
3602
3603 // Collect method holders
3604 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3605 for (; !vfst.at_end(); vfst.security_next()) {
3606 Method* m = vfst.method();
3607 // Native frames are not returned
3608 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3609 Klass* holder = m->method_holder();
3610 assert(holder->is_klass(), "just checking");
3611 klass_array->append(holder);
3612 }
3613 }
3614
3615 // Create result array of type [Ljava/lang/Class;
3616 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3617 // Fill in mirrors corresponding to method holders
3618 for (int i = 0; i < klass_array->length(); i++) {
3619 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3620 }
3621
3622 return (jobjectArray) JNIHandles::make_local(env, result);
3623 JVM_END
3624
3625
3626 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3627 JVMWrapper("JVM_ClassDepth");
3628 ResourceMark rm(THREAD);
3629 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3630 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3631
3632 const char* str = java_lang_String::as_utf8_string(class_name_str());
3633 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3634 if (class_name_sym == NULL) {
3635 return -1;
3636 }
3637
3638 int depth = 0;
3639
3640 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3641 if (!vfst.method()->is_native()) {
3642 InstanceKlass* holder = vfst.method()->method_holder();
3643 assert(holder->is_klass(), "just checking");
3644 if (holder->name() == class_name_sym) {
3645 return depth;
3646 }
3647 depth++;
3648 }
3649 }
3650 return -1;
3651 JVM_END
3652
3653
3654 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3655 JVMWrapper("JVM_ClassLoaderDepth");
3656 ResourceMark rm(THREAD);
3657 int depth = 0;
3658 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3659 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3660 bool trusted = is_trusted_frame(thread, &vfst);
3661 if (trusted) return -1;
3662
3663 Method* m = vfst.method();
3664 if (!m->is_native()) {
3665 InstanceKlass* holder = m->method_holder();
3666 assert(holder->is_klass(), "just checking");
3667 oop loader = holder->class_loader();
3668 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3669 return depth;
3670 }
3671 depth++;
3672 }
3673 }
3674 return -1;
3675 JVM_END
3676
3677
3678 // java.lang.Package ////////////////////////////////////////////////////////////////
3679
3680
3681 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3682 JVMWrapper("JVM_GetSystemPackage");
3683 ResourceMark rm(THREAD);
3684 JvmtiVMObjectAllocEventCollector oam;
3685 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3686 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3687 return (jstring) JNIHandles::make_local(result);
3688 JVM_END
3689
3690
3691 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3692 JVMWrapper("JVM_GetSystemPackages");
3693 JvmtiVMObjectAllocEventCollector oam;
3694 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3695 return (jobjectArray) JNIHandles::make_local(result);
3696 JVM_END
3697
3698
3699 // ObjectInputStream ///////////////////////////////////////////////////////////////
3700
3701 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3702 if (current_class == NULL) {
3703 return true;
3704 }
3705 if ((current_class == field_class) || access.is_public()) {
3706 return true;
3707 }
3708
3709 if (access.is_protected()) {
3710 // See if current_class is a subclass of field_class
3711 if (current_class->is_subclass_of(field_class)) {
3712 return true;
3713 }
3714 }
3715
3716 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3717 }
3718
3719
3720 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3721 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3722 JVMWrapper("JVM_AllocateNewObject");
3723 JvmtiVMObjectAllocEventCollector oam;
3724 // Receiver is not used
3725 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3726 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3727
3728 // Cannot instantiate primitive types
3729 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3730 ResourceMark rm(THREAD);
3731 THROW_0(vmSymbols::java_lang_InvalidClassException());
3732 }
3733
3734 // Arrays not allowed here, must use JVM_AllocateNewArray
3735 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3736 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3737 ResourceMark rm(THREAD);
3738 THROW_0(vmSymbols::java_lang_InvalidClassException());
3739 }
3740
3741 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3742 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3743
3744 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3745
3746 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3747 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3748
3749 // Make sure klass is initialized, since we are about to instantiate one of them.
3750 curr_klass->initialize(CHECK_NULL);
3751
3752 methodHandle m (THREAD,
3753 init_klass->find_method(vmSymbols::object_initializer_name(),
3754 vmSymbols::void_method_signature()));
3755 if (m.is_null()) {
3756 ResourceMark rm(THREAD);
3757 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3758 Method::name_and_sig_as_C_string(init_klass(),
3759 vmSymbols::object_initializer_name(),
3760 vmSymbols::void_method_signature()));
3761 }
3762
3763 if (curr_klass == init_klass && !m->is_public()) {
3764 // Calling the constructor for class 'curr_klass'.
3765 // Only allow calls to a public no-arg constructor.
3766 // This path corresponds to creating an Externalizable object.
3767 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3768 }
3769
3770 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3771 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3772 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3773 }
3774
3775 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3776 // Call constructor m. This might call a constructor higher up in the hierachy
3777 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3778
3779 return JNIHandles::make_local(obj());
3780 JVM_END
3781
3782
3783 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3784 JVMWrapper("JVM_AllocateNewArray");
3785 JvmtiVMObjectAllocEventCollector oam;
3786 oop mirror = JNIHandles::resolve_non_null(currClass);
3787
3788 if (java_lang_Class::is_primitive(mirror)) {
3789 THROW_0(vmSymbols::java_lang_InvalidClassException());
3790 }
3791 Klass* k = java_lang_Class::as_Klass(mirror);
3792 oop result;
3793
3794 if (k->oop_is_typeArray()) {
3795 // typeArray
3796 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3797 } else if (k->oop_is_objArray()) {
3798 // objArray
3799 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3800 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3801 result = oak->allocate(length, CHECK_NULL);
3802 } else {
3803 THROW_0(vmSymbols::java_lang_InvalidClassException());
3804 }
3805 return JNIHandles::make_local(env, result);
3806 JVM_END
3807
3808
3809 // Returns first non-privileged class loader on the stack (excluding reflection
3810 // generated frames) or null if only classes loaded by the boot class loader
3811 // and extension class loader are found on the stack.
3812
3813 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3814 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3815 // UseNewReflection
3816 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3817 oop loader = vfst.method()->method_holder()->class_loader();
3818 if (loader != NULL && !SystemDictionary::is_ext_class_loader(loader)) {
3819 return JNIHandles::make_local(env, loader);
3820 }
3821 }
3822 return NULL;
3823 JVM_END
3824
3825
3826 // Load a class relative to the most recent class on the stack with a non-null
3827 // classloader.
3828 // This function has been deprecated and should not be considered part of the
3829 // specified JVM interface.
3830
3831 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3832 jclass currClass, jstring currClassName))
3833 JVMWrapper("JVM_LoadClass0");
3834 // Receiver is not used
3835 ResourceMark rm(THREAD);
3836
3837 // Class name argument is not guaranteed to be in internal format
3838 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3839 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3840
3841 const char* str = java_lang_String::as_utf8_string(string());
3842
3843 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3844 // It's impossible to create this class; the name cannot fit
3845 // into the constant pool.
3846 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3847 }
3848
3849 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3850 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3851 // Find the most recent class on the stack with a non-null classloader
3852 oop loader = NULL;
3853 oop protection_domain = NULL;
3854 if (curr_klass.is_null()) {
3855 for (vframeStream vfst(thread);
3856 !vfst.at_end() && loader == NULL;
3857 vfst.next()) {
3858 if (!vfst.method()->is_native()) {
3859 InstanceKlass* holder = vfst.method()->method_holder();
3860 loader = holder->class_loader();
3861 protection_domain = holder->protection_domain();
3862 }
3863 }
3864 } else {
3865 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3866 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3867 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3868 }
3869 Handle h_loader(THREAD, loader);
3870 Handle h_prot (THREAD, protection_domain);
3871 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3872 false, thread);
3873 if (TraceClassResolution && result != NULL) {
3874 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3875 }
3876 return result;
3877 JVM_END
3878
3879
3880 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3881
3882
3883 // resolve array handle and check arguments
3884 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3885 if (arr == NULL) {
3886 THROW_0(vmSymbols::java_lang_NullPointerException());
3887 }
3888 oop a = JNIHandles::resolve_non_null(arr);
3889 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3890 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3891 }
3892 return arrayOop(a);
3893 }
3894
3895
3896 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3897 JVMWrapper("JVM_GetArrayLength");
3898 arrayOop a = check_array(env, arr, false, CHECK_0);
3899 return a->length();
3900 JVM_END
3901
3902
3903 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3904 JVMWrapper("JVM_Array_Get");
3905 JvmtiVMObjectAllocEventCollector oam;
3906 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3907 jvalue value;
3908 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3909 oop box = Reflection::box(&value, type, CHECK_NULL);
3910 return JNIHandles::make_local(env, box);
3911 JVM_END
3912
3913
3914 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3915 JVMWrapper("JVM_GetPrimitiveArrayElement");
3916 jvalue value;
3917 value.i = 0; // to initialize value before getting used in CHECK
3918 arrayOop a = check_array(env, arr, true, CHECK_(value));
3919 assert(a->is_typeArray(), "just checking");
3920 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3921 BasicType wide_type = (BasicType) wCode;
3922 if (type != wide_type) {
3923 Reflection::widen(&value, type, wide_type, CHECK_(value));
3924 }
3925 return value;
3926 JVM_END
3927
3928
3929 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3930 JVMWrapper("JVM_SetArrayElement");
3931 arrayOop a = check_array(env, arr, false, CHECK);
3932 oop box = JNIHandles::resolve(val);
3933 jvalue value;
3934 value.i = 0; // to initialize value before getting used in CHECK
3935 BasicType value_type;
3936 if (a->is_objArray()) {
3937 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3938 value_type = Reflection::unbox_for_regular_object(box, &value);
3939 } else {
3940 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3941 }
3942 Reflection::array_set(&value, a, index, value_type, CHECK);
3943 JVM_END
3944
3945
3946 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3947 JVMWrapper("JVM_SetPrimitiveArrayElement");
3948 arrayOop a = check_array(env, arr, true, CHECK);
3949 assert(a->is_typeArray(), "just checking");
3950 BasicType value_type = (BasicType) vCode;
3951 Reflection::array_set(&v, a, index, value_type, CHECK);
3952 JVM_END
3953
3954
3955 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3956 JVMWrapper("JVM_NewArray");
3957 JvmtiVMObjectAllocEventCollector oam;
3958 oop element_mirror = JNIHandles::resolve(eltClass);
3959 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3960 return JNIHandles::make_local(env, result);
3961 JVM_END
3962
3963
3964 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3965 JVMWrapper("JVM_NewMultiArray");
3966 JvmtiVMObjectAllocEventCollector oam;
3967 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3968 oop element_mirror = JNIHandles::resolve(eltClass);
3969 assert(dim_array->is_typeArray(), "just checking");
3970 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3971 return JNIHandles::make_local(env, result);
3972 JVM_END
3973
3974
3975 // Networking library support ////////////////////////////////////////////////////////////////////
3976
3977 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3978 JVMWrapper("JVM_InitializeSocketLibrary");
3979 return 0;
3980 JVM_END
3981
3982
3983 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3984 JVMWrapper("JVM_Socket");
3985 return os::socket(domain, type, protocol);
3986 JVM_END
3987
3988
3989 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3990 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3991 //%note jvm_r6
3992 return os::socket_close(fd);
3993 JVM_END
3994
3995
3996 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3997 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3998 //%note jvm_r6
3999 return os::socket_shutdown(fd, howto);
4000 JVM_END
4001
4002
4003 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
4004 JVMWrapper2("JVM_Recv (0x%x)", fd);
4005 //%note jvm_r6
4006 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
4007 JVM_END
4008
4009
4010 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
4011 JVMWrapper2("JVM_Send (0x%x)", fd);
4012 //%note jvm_r6
4013 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
4014 JVM_END
4015
4016
4017 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
4018 JVMWrapper2("JVM_Timeout (0x%x)", fd);
4019 //%note jvm_r6
4020 return os::timeout(fd, timeout);
4021 JVM_END
4022
4023
4024 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
4025 JVMWrapper2("JVM_Listen (0x%x)", fd);
4026 //%note jvm_r6
4027 return os::listen(fd, count);
4028 JVM_END
4029
4030
4031 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
4032 JVMWrapper2("JVM_Connect (0x%x)", fd);
4033 //%note jvm_r6
4034 return os::connect(fd, him, (socklen_t)len);
4035 JVM_END
4036
4037
4038 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
4039 JVMWrapper2("JVM_Bind (0x%x)", fd);
4040 //%note jvm_r6
4041 return os::bind(fd, him, (socklen_t)len);
4042 JVM_END
4043
4044
4045 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
4046 JVMWrapper2("JVM_Accept (0x%x)", fd);
4047 //%note jvm_r6
4048 socklen_t socklen = (socklen_t)(*len);
4049 jint result = os::accept(fd, him, &socklen);
4050 *len = (jint)socklen;
4051 return result;
4052 JVM_END
4053
4054
4055 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
4056 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
4057 //%note jvm_r6
4058 socklen_t socklen = (socklen_t)(*fromlen);
4059 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
4060 *fromlen = (int)socklen;
4061 return result;
4062 JVM_END
4063
4064
4065 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
4066 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
4067 //%note jvm_r6
4068 socklen_t socklen = (socklen_t)(*len);
4069 jint result = os::get_sock_name(fd, him, &socklen);
4070 *len = (int)socklen;
4071 return result;
4072 JVM_END
4073
4074
4075 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
4076 JVMWrapper2("JVM_SendTo (0x%x)", fd);
4077 //%note jvm_r6
4078 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
4079 JVM_END
4080
4081
4082 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
4083 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
4084 //%note jvm_r6
4085 return os::socket_available(fd, pbytes);
4086 JVM_END
4087
4088
4089 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
4090 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4091 //%note jvm_r6
4092 socklen_t socklen = (socklen_t)(*optlen);
4093 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
4094 *optlen = (int)socklen;
4095 return result;
4096 JVM_END
4097
4098
4099 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
4100 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
4101 //%note jvm_r6
4102 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
4103 JVM_END
4104
4105
4106 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
4107 JVMWrapper("JVM_GetHostName");
4108 return os::get_host_name(name, namelen);
4109 JVM_END
4110
4111
4112 // Library support ///////////////////////////////////////////////////////////////////////////
4113
4114 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
4115 //%note jvm_ct
4116 JVMWrapper2("JVM_LoadLibrary (%s)", name);
4117 char ebuf[1024];
4118 void *load_result;
4119 {
4120 ThreadToNativeFromVM ttnfvm(thread);
4121 load_result = os::dll_load(name, ebuf, sizeof ebuf);
4122 }
4123 if (load_result == NULL) {
4124 char msg[1024];
4125 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
4126 // Since 'ebuf' may contain a string encoded using
4127 // platform encoding scheme, we need to pass
4128 // Exceptions::unsafe_to_utf8 to the new_exception method
4129 // as the last argument. See bug 6367357.
4130 Handle h_exception =
4131 Exceptions::new_exception(thread,
4132 vmSymbols::java_lang_UnsatisfiedLinkError(),
4133 msg, Exceptions::unsafe_to_utf8);
4134
4135 THROW_HANDLE_0(h_exception);
4136 }
4137 return load_result;
4138 JVM_END
4139
4140
4141 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
4142 JVMWrapper("JVM_UnloadLibrary");
4143 os::dll_unload(handle);
4144 JVM_END
4145
4146
4147 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
4148 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
4149 return os::dll_lookup(handle, name);
4150 JVM_END
4151
4152
4153 // Floating point support ////////////////////////////////////////////////////////////////////
4154
4155 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
4156 JVMWrapper("JVM_IsNaN");
4157 return g_isnan(a);
4158 JVM_END
4159
4160
4161 // JNI version ///////////////////////////////////////////////////////////////////////////////
4162
4163 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
4164 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
4165 return Threads::is_supported_jni_version_including_1_1(version);
4166 JVM_END
4167
4168
4169 // String support ///////////////////////////////////////////////////////////////////////////
4170
4171 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4172 JVMWrapper("JVM_InternString");
4173 JvmtiVMObjectAllocEventCollector oam;
4174 if (str == NULL) return NULL;
4175 oop string = JNIHandles::resolve_non_null(str);
4176 oop result = StringTable::intern(string, CHECK_NULL);
4177 return (jstring) JNIHandles::make_local(env, result);
4178 JVM_END
4179
4180
4181 // Raw monitor support //////////////////////////////////////////////////////////////////////
4182
4183 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4184 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4185 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4186 // that only works with java threads.
4187
4188
4189 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4190 VM_Exit::block_if_vm_exited();
4191 JVMWrapper("JVM_RawMonitorCreate");
4192 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4193 }
4194
4195
4196 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4197 VM_Exit::block_if_vm_exited();
4198 JVMWrapper("JVM_RawMonitorDestroy");
4199 delete ((Mutex*) mon);
4200 }
4201
4202
4203 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4204 VM_Exit::block_if_vm_exited();
4205 JVMWrapper("JVM_RawMonitorEnter");
4206 ((Mutex*) mon)->jvm_raw_lock();
4207 return 0;
4208 }
4209
4210
4211 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4212 VM_Exit::block_if_vm_exited();
4213 JVMWrapper("JVM_RawMonitorExit");
4214 ((Mutex*) mon)->jvm_raw_unlock();
4215 }
4216
4217
4218 // Support for Serialization
4219
4220 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4221 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4222 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4223 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4224
4225 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4226 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4227 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4228 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4229
4230
4231 void initialize_converter_functions() {
4232 if (JDK_Version::is_gte_jdk14x_version()) {
4233 // These functions only exist for compatibility with 1.3.1 and earlier
4234 return;
4235 }
4236
4237 // called from universe_post_init()
4238 assert(
4239 int_bits_to_float_fn == NULL &&
4240 long_bits_to_double_fn == NULL &&
4241 float_to_int_bits_fn == NULL &&
4242 double_to_long_bits_fn == NULL ,
4243 "initialization done twice"
4244 );
4245 // initialize
4246 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4247 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4248 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4249 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4250 // verify
4251 assert(
4252 int_bits_to_float_fn != NULL &&
4253 long_bits_to_double_fn != NULL &&
4254 float_to_int_bits_fn != NULL &&
4255 double_to_long_bits_fn != NULL ,
4256 "initialization failed"
4257 );
4258 }
4259
4260
4261
4262 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4263
4264 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4265 Handle loader, Handle protection_domain,
4266 jboolean throwError, TRAPS) {
4267 // Security Note:
4268 // The Java level wrapper will perform the necessary security check allowing
4269 // us to pass the NULL as the initiating class loader. The VM is responsible for
4270 // the checkPackageAccess relative to the initiating class loader via the
4271 // protection_domain. The protection_domain is passed as NULL by the java code
4272 // if there is no security manager in 3-arg Class.forName().
4273 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4274
4275 KlassHandle klass_handle(THREAD, klass);
4276 // Check if we should initialize the class
4277 if (init && klass_handle->oop_is_instance()) {
4278 klass_handle->initialize(CHECK_NULL);
4279 }
4280 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4281 }
4282
4283
4284 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4285
4286 #ifndef PRODUCT
4287
4288 extern "C" {
4289 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4290 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4291 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4292 }
4293
4294 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4295 JVMWrapper("JVM_AccessBoolVMFlag");
4296 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4297 JVM_END
4298
4299 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4300 JVMWrapper("JVM_AccessVMIntFlag");
4301 intx v;
4302 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4303 *value = (jint)v;
4304 return result;
4305 JVM_END
4306
4307
4308 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4309 JVMWrapper("JVM_VMBreakPoint");
4310 oop the_obj = JNIHandles::resolve(obj);
4311 BREAKPOINT;
4312 JVM_END
4313
4314
4315 #endif
4316
4317
4318 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4319
4320 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4321 JVMWrapper("JVM_InvokeMethod");
4322 Handle method_handle;
4323 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4324 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4325 Handle receiver(THREAD, JNIHandles::resolve(obj));
4326 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4327 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4328 jobject res = JNIHandles::make_local(env, result);
4329 if (JvmtiExport::should_post_vm_object_alloc()) {
4330 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4331 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4332 if (java_lang_Class::is_primitive(ret_type)) {
4333 // Only for primitive type vm allocates memory for java object.
4334 // See box() method.
4335 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4336 }
4337 }
4338 return res;
4339 } else {
4340 THROW_0(vmSymbols::java_lang_StackOverflowError());
4341 }
4342 JVM_END
4343
4344
4345 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4346 JVMWrapper("JVM_NewInstanceFromConstructor");
4347 oop constructor_mirror = JNIHandles::resolve(c);
4348 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4349 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4350 jobject res = JNIHandles::make_local(env, result);
4351 if (JvmtiExport::should_post_vm_object_alloc()) {
4352 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4353 }
4354 return res;
4355 JVM_END
4356
4357 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4358
4359 JVM_LEAF(jboolean, JVM_SupportsCX8())
4360 JVMWrapper("JVM_SupportsCX8");
4361 return VM_Version::supports_cx8();
4362 JVM_END
4363
4364
4365 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4366 JVMWrapper("JVM_CX8Field");
4367 jlong res;
4368 oop o = JNIHandles::resolve(obj);
4369 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4370 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4371
4372 assert(VM_Version::supports_cx8(), "cx8 not supported");
4373 res = Atomic::cmpxchg(newVal, addr, oldVal);
4374
4375 return res == oldVal;
4376 JVM_END
4377
4378 // DTrace ///////////////////////////////////////////////////////////////////
4379
4380 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4381 JVMWrapper("JVM_DTraceGetVersion");
4382 return (jint)JVM_TRACING_DTRACE_VERSION;
4383 JVM_END
4384
4385 JVM_ENTRY(jlong,JVM_DTraceActivate(
4386 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4387 JVM_DTraceProvider* providers))
4388 JVMWrapper("JVM_DTraceActivate");
4389 return DTraceJSDT::activate(
4390 version, module_name, providers_count, providers, THREAD);
4391 JVM_END
4392
4393 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4394 JVMWrapper("JVM_DTraceIsProbeEnabled");
4395 return DTraceJSDT::is_probe_enabled(method);
4396 JVM_END
4397
4398 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4399 JVMWrapper("JVM_DTraceDispose");
4400 DTraceJSDT::dispose(handle);
4401 JVM_END
4402
4403 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4404 JVMWrapper("JVM_DTraceIsSupported");
4405 return DTraceJSDT::is_supported();
4406 JVM_END
4407
4408 // Returns an array of all live Thread objects (VM internal JavaThreads,
4409 // jvmti agent threads, and JNI attaching threads are skipped)
4410 // See CR 6404306 regarding JNI attaching threads
4411 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4412 ResourceMark rm(THREAD);
4413 ThreadsListEnumerator tle(THREAD, false, false);
4414 JvmtiVMObjectAllocEventCollector oam;
4415
4416 int num_threads = tle.num_threads();
4417 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4418 objArrayHandle threads_ah(THREAD, r);
4419
4420 for (int i = 0; i < num_threads; i++) {
4421 Handle h = tle.get_threadObj(i);
4422 threads_ah->obj_at_put(i, h());
4423 }
4424
4425 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4426 JVM_END
4427
4428
4429 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4430 // Return StackTraceElement[][], each element is the stack trace of a thread in
4431 // the corresponding entry in the given threads array
4432 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4433 JVMWrapper("JVM_DumpThreads");
4434 JvmtiVMObjectAllocEventCollector oam;
4435
4436 // Check if threads is null
4437 if (threads == NULL) {
4438 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4439 }
4440
4441 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4442 objArrayHandle ah(THREAD, a);
4443 int num_threads = ah->length();
4444 // check if threads is non-empty array
4445 if (num_threads == 0) {
4446 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4447 }
4448
4449 // check if threads is not an array of objects of Thread class
4450 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4451 if (k != SystemDictionary::Thread_klass()) {
4452 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4453 }
4454
4455 ResourceMark rm(THREAD);
4456
4457 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4458 for (int i = 0; i < num_threads; i++) {
4459 oop thread_obj = ah->obj_at(i);
4460 instanceHandle h(THREAD, (instanceOop) thread_obj);
4461 thread_handle_array->append(h);
4462 }
4463
4464 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4465 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4466
4467 JVM_END
4468
4469 // JVM monitoring and management support
4470 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4471 return Management::get_jmm_interface(version);
4472 JVM_END
4473
4474 // com.sun.tools.attach.VirtualMachine agent properties support
4475 //
4476 // Initialize the agent properties with the properties maintained in the VM
4477 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4478 JVMWrapper("JVM_InitAgentProperties");
4479 ResourceMark rm;
4480
4481 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4482
4483 PUTPROP(props, "sun.java.command", Arguments::java_command());
4484 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4485 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4486 return properties;
4487 JVM_END
4488
4489 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4490 {
4491 JVMWrapper("JVM_GetEnclosingMethodInfo");
4492 JvmtiVMObjectAllocEventCollector oam;
4493
4494 if (ofClass == NULL) {
4495 return NULL;
4496 }
4497 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4498 // Special handling for primitive objects
4499 if (java_lang_Class::is_primitive(mirror())) {
4500 return NULL;
4501 }
4502 Klass* k = java_lang_Class::as_Klass(mirror());
4503 if (!k->oop_is_instance()) {
4504 return NULL;
4505 }
4506 instanceKlassHandle ik_h(THREAD, k);
4507 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4508 if (encl_method_class_idx == 0) {
4509 return NULL;
4510 }
4511 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4512 objArrayHandle dest(THREAD, dest_o);
4513 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4514 dest->obj_at_put(0, enc_k->java_mirror());
4515 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4516 if (encl_method_method_idx != 0) {
4517 Symbol* sym = ik_h->constants()->symbol_at(
4518 extract_low_short_from_int(
4519 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4520 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4521 dest->obj_at_put(1, str());
4522 sym = ik_h->constants()->symbol_at(
4523 extract_high_short_from_int(
4524 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4525 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4526 dest->obj_at_put(2, str());
4527 }
4528 return (jobjectArray) JNIHandles::make_local(dest());
4529 }
4530 JVM_END
4531
4532 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4533 jint javaThreadState))
4534 {
4535 // If new thread states are added in future JDK and VM versions,
4536 // this should check if the JDK version is compatible with thread
4537 // states supported by the VM. Return NULL if not compatible.
4538 //
4539 // This function must map the VM java_lang_Thread::ThreadStatus
4540 // to the Java thread state that the JDK supports.
4541 //
4542
4543 typeArrayHandle values_h;
4544 switch (javaThreadState) {
4545 case JAVA_THREAD_STATE_NEW : {
4546 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4547 values_h = typeArrayHandle(THREAD, r);
4548 values_h->int_at_put(0, java_lang_Thread::NEW);
4549 break;
4550 }
4551 case JAVA_THREAD_STATE_RUNNABLE : {
4552 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4553 values_h = typeArrayHandle(THREAD, r);
4554 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4555 break;
4556 }
4557 case JAVA_THREAD_STATE_BLOCKED : {
4558 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4559 values_h = typeArrayHandle(THREAD, r);
4560 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4561 break;
4562 }
4563 case JAVA_THREAD_STATE_WAITING : {
4564 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4565 values_h = typeArrayHandle(THREAD, r);
4566 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4567 values_h->int_at_put(1, java_lang_Thread::PARKED);
4568 break;
4569 }
4570 case JAVA_THREAD_STATE_TIMED_WAITING : {
4571 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4572 values_h = typeArrayHandle(THREAD, r);
4573 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4574 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4575 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4576 break;
4577 }
4578 case JAVA_THREAD_STATE_TERMINATED : {
4579 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4580 values_h = typeArrayHandle(THREAD, r);
4581 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4582 break;
4583 }
4584 default:
4585 // Unknown state - probably incompatible JDK version
4586 return NULL;
4587 }
4588
4589 return (jintArray) JNIHandles::make_local(env, values_h());
4590 }
4591 JVM_END
4592
4593
4594 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4595 jint javaThreadState,
4596 jintArray values))
4597 {
4598 // If new thread states are added in future JDK and VM versions,
4599 // this should check if the JDK version is compatible with thread
4600 // states supported by the VM. Return NULL if not compatible.
4601 //
4602 // This function must map the VM java_lang_Thread::ThreadStatus
4603 // to the Java thread state that the JDK supports.
4604 //
4605
4606 ResourceMark rm;
4607
4608 // Check if threads is null
4609 if (values == NULL) {
4610 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4611 }
4612
4613 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4614 typeArrayHandle values_h(THREAD, v);
4615
4616 objArrayHandle names_h;
4617 switch (javaThreadState) {
4618 case JAVA_THREAD_STATE_NEW : {
4619 assert(values_h->length() == 1 &&
4620 values_h->int_at(0) == java_lang_Thread::NEW,
4621 "Invalid threadStatus value");
4622
4623 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4624 1, /* only 1 substate */
4625 CHECK_NULL);
4626 names_h = objArrayHandle(THREAD, r);
4627 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4628 names_h->obj_at_put(0, name());
4629 break;
4630 }
4631 case JAVA_THREAD_STATE_RUNNABLE : {
4632 assert(values_h->length() == 1 &&
4633 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4634 "Invalid threadStatus value");
4635
4636 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4637 1, /* only 1 substate */
4638 CHECK_NULL);
4639 names_h = objArrayHandle(THREAD, r);
4640 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4641 names_h->obj_at_put(0, name());
4642 break;
4643 }
4644 case JAVA_THREAD_STATE_BLOCKED : {
4645 assert(values_h->length() == 1 &&
4646 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4647 "Invalid threadStatus value");
4648
4649 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4650 1, /* only 1 substate */
4651 CHECK_NULL);
4652 names_h = objArrayHandle(THREAD, r);
4653 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4654 names_h->obj_at_put(0, name());
4655 break;
4656 }
4657 case JAVA_THREAD_STATE_WAITING : {
4658 assert(values_h->length() == 2 &&
4659 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4660 values_h->int_at(1) == java_lang_Thread::PARKED,
4661 "Invalid threadStatus value");
4662 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4663 2, /* number of substates */
4664 CHECK_NULL);
4665 names_h = objArrayHandle(THREAD, r);
4666 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4667 CHECK_NULL);
4668 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4669 CHECK_NULL);
4670 names_h->obj_at_put(0, name0());
4671 names_h->obj_at_put(1, name1());
4672 break;
4673 }
4674 case JAVA_THREAD_STATE_TIMED_WAITING : {
4675 assert(values_h->length() == 3 &&
4676 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4677 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4678 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4679 "Invalid threadStatus value");
4680 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4681 3, /* number of substates */
4682 CHECK_NULL);
4683 names_h = objArrayHandle(THREAD, r);
4684 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4685 CHECK_NULL);
4686 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4687 CHECK_NULL);
4688 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4689 CHECK_NULL);
4690 names_h->obj_at_put(0, name0());
4691 names_h->obj_at_put(1, name1());
4692 names_h->obj_at_put(2, name2());
4693 break;
4694 }
4695 case JAVA_THREAD_STATE_TERMINATED : {
4696 assert(values_h->length() == 1 &&
4697 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4698 "Invalid threadStatus value");
4699 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4700 1, /* only 1 substate */
4701 CHECK_NULL);
4702 names_h = objArrayHandle(THREAD, r);
4703 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4704 names_h->obj_at_put(0, name());
4705 break;
4706 }
4707 default:
4708 // Unknown state - probably incompatible JDK version
4709 return NULL;
4710 }
4711 return (jobjectArray) JNIHandles::make_local(env, names_h());
4712 }
4713 JVM_END
4714
4715 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4716 {
4717 memset(info, 0, info_size);
4718
4719 info->jvm_version = Abstract_VM_Version::jvm_version();
4720 info->update_version = 0; /* 0 in HotSpot Express VM */
4721 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4722
4723 // when we add a new capability in the jvm_version_info struct, we should also
4724 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4725 // counter defined in runtimeService.cpp.
4726 info->is_attachable = AttachListener::is_attach_supported();
4727 }
4728 JVM_END