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