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