1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/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_aix
80 # include "jvm_aix.h"
81 #endif
82 #ifdef TARGET_OS_FAMILY_bsd
83 # include "jvm_bsd.h"
84 #endif
85
86 #include <errno.h>
87
88 /*
89 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
90 such ctors and calls MUST NOT come between an oop declaration/init and its
91 usage because if objects are move this may cause various memory stomps, bus
92 errors and segfaults. Here is a cookbook for causing so called "naked oop
93 failures":
94
95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
96 JVMWrapper("JVM_GetClassDeclaredFields");
97
98 // Object address to be held directly in mirror & not visible to GC
99 oop mirror = JNIHandles::resolve_non_null(ofClass);
100
101 // If this ctor can hit a safepoint, moving objects around, then
102 ComplexConstructor foo;
103
104 // Boom! mirror may point to JUNK instead of the intended object
105 (some dereference of mirror)
106
107 // Here's another call that may block for GC, making mirror stale
108 MutexLocker ml(some_lock);
109
110 // And here's an initializer that can result in a stale oop
111 // all in one step.
112 oop o = call_that_can_throw_exception(TRAPS);
113
114
115 The solution is to keep the oop declaration BELOW the ctor or function
116 call that might cause a GC, do another resolve to reassign the oop, or
117 consider use of a Handle instead of an oop so there is immunity from object
118 motion. But note that the "QUICK" entries below do not have a handlemark
119 and thus can only support use of handles passed in.
120 */
121
122 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
123 ResourceMark rm;
124 int line_number = -1;
125 const char * source_file = NULL;
126 const char * trace = "explicit";
127 InstanceKlass* caller = NULL;
128 JavaThread* jthread = JavaThread::current();
129 if (jthread->has_last_Java_frame()) {
130 vframeStream vfst(jthread);
131
132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
134 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
136 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
137
138 Method* last_caller = NULL;
139
140 while (!vfst.at_end()) {
141 Method* m = vfst.method();
142 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
143 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
144 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
145 break;
146 }
147 last_caller = m;
148 vfst.next();
149 }
150 // if this is called from Class.forName0 and that is called from Class.forName,
151 // then print the caller of Class.forName. If this is Class.loadClass, then print
152 // that caller, otherwise keep quiet since this should be picked up elsewhere.
153 bool found_it = false;
154 if (!vfst.at_end() &&
155 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
156 vfst.method()->name() == vmSymbols::forName0_name()) {
157 vfst.next();
158 if (!vfst.at_end() &&
159 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
160 vfst.method()->name() == vmSymbols::forName_name()) {
161 vfst.next();
162 found_it = true;
163 }
164 } else if (last_caller != NULL &&
165 last_caller->method_holder()->name() ==
166 vmSymbols::java_lang_ClassLoader() &&
167 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
168 last_caller->name() == vmSymbols::loadClass_name())) {
169 found_it = true;
170 } else if (!vfst.at_end()) {
171 if (vfst.method()->is_native()) {
172 // JNI call
173 found_it = true;
174 }
175 }
176 if (found_it && !vfst.at_end()) {
177 // found the caller
178 caller = vfst.method()->method_holder();
179 line_number = vfst.method()->line_number_from_bci(vfst.bci());
180 if (line_number == -1) {
181 // show method name if it's a native method
182 trace = vfst.method()->name_and_sig_as_C_string();
183 }
184 Symbol* s = caller->source_file_name();
185 if (s != NULL) {
186 source_file = s->as_C_string();
187 }
188 }
189 }
190 if (caller != NULL) {
191 if (to_class != caller) {
192 const char * from = caller->external_name();
193 const char * to = to_class->external_name();
194 // print in a single call to reduce interleaving between threads
195 if (source_file != NULL) {
196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
197 } else {
198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
199 }
200 }
201 }
202 }
203
204 void trace_class_resolution(Klass* to_class) {
205 EXCEPTION_MARK;
206 trace_class_resolution_impl(to_class, THREAD);
207 if (HAS_PENDING_EXCEPTION) {
208 CLEAR_PENDING_EXCEPTION;
209 }
210 }
211
212 // Wrapper to trace JVM functions
213
214 #ifdef ASSERT
215 class JVMTraceWrapper : public StackObj {
216 public:
217 JVMTraceWrapper(const char* format, ...) {
218 if (TraceJVMCalls) {
219 va_list ap;
220 va_start(ap, format);
221 tty->print("JVM ");
222 tty->vprint_cr(format, ap);
223 va_end(ap);
224 }
225 }
226 };
227
228 Histogram* JVMHistogram;
229 volatile jint JVMHistogram_lock = 0;
230
231 class JVMHistogramElement : public HistogramElement {
232 public:
233 JVMHistogramElement(const char* name);
234 };
235
236 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
237 _name = elementName;
238 uintx count = 0;
239
240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
242 count +=1;
243 if ( (WarnOnStalledSpinLock > 0)
244 && (count % WarnOnStalledSpinLock == 0)) {
245 warning("JVMHistogram_lock seems to be stalled");
246 }
247 }
248 }
249
250 if(JVMHistogram == NULL)
251 JVMHistogram = new Histogram("JVM Call Counts",100);
252
253 JVMHistogram->add_element(this);
254 Atomic::dec(&JVMHistogram_lock);
255 }
256
257 #define JVMCountWrapper(arg) \
258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
260
261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
265 #else
266 #define JVMWrapper(arg1)
267 #define JVMWrapper2(arg1, arg2)
268 #define JVMWrapper3(arg1, arg2, arg3)
269 #define JVMWrapper4(arg1, arg2, arg3, arg4)
270 #endif
271
272
273 // Interface version /////////////////////////////////////////////////////////////////////
274
275
276 JVM_LEAF(jint, JVM_GetInterfaceVersion())
277 return JVM_INTERFACE_VERSION;
278 JVM_END
279
280
281 // java.lang.System //////////////////////////////////////////////////////////////////////
282
283
284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
285 JVMWrapper("JVM_CurrentTimeMillis");
286 return os::javaTimeMillis();
287 JVM_END
288
289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
290 JVMWrapper("JVM_NanoTime");
291 return os::javaTimeNanos();
292 JVM_END
293
294
295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
296 jobject dst, jint dst_pos, jint length))
297 JVMWrapper("JVM_ArrayCopy");
298 // Check if we have null pointers
299 if (src == NULL || dst == NULL) {
300 THROW(vmSymbols::java_lang_NullPointerException());
301 }
302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
306 // Do copy
307 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
308 JVM_END
309
310
311 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
312 JavaValue r(T_OBJECT);
313 // public synchronized Object put(Object key, Object value);
314 HandleMark hm(THREAD);
315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
317 JavaCalls::call_virtual(&r,
318 props,
319 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
320 vmSymbols::put_name(),
321 vmSymbols::object_object_object_signature(),
322 key_str,
323 value_str,
324 THREAD);
325 }
326
327
328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
329
330
331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
332 JVMWrapper("JVM_InitProperties");
333 ResourceMark rm;
334
335 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
336
337 // System property list includes both user set via -D option and
338 // jvm system specific properties.
339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
340 PUTPROP(props, p->key(), p->value());
341 }
342
343 // Convert the -XX:MaxDirectMemorySize= command line flag
344 // to the sun.nio.MaxDirectMemorySize property.
345 // Do this after setting user properties to prevent people
346 // from setting the value with a -D option, as requested.
347 {
348 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
349 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
350 } else {
351 char as_chars[256];
352 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
353 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
354 }
355 }
356
357 // JVM monitoring and management support
358 // Add the sun.management.compiler property for the compiler's name
359 {
360 #undef CSIZE
361 #if defined(_LP64) || defined(_WIN64)
362 #define CSIZE "64-Bit "
363 #else
364 #define CSIZE
365 #endif // 64bit
366
367 #ifdef TIERED
368 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
369 #else
370 #if defined(COMPILER1)
371 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
372 #elif defined(COMPILER2)
373 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
374 #else
375 const char* compiler_name = "";
376 #endif // compilers
377 #endif // TIERED
378
379 if (*compiler_name != '\0' &&
380 (Arguments::mode() != Arguments::_int)) {
381 PUTPROP(props, "sun.management.compiler", compiler_name);
382 }
383 }
384
385 return properties;
386 JVM_END
387
388
389 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
390
391 extern volatile jint vm_created;
392
393 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
394 if (vm_created != 0 && (code == 0)) {
395 // The VM is about to exit. We call back into Java to check whether finalizers should be run
396 Universe::run_finalizers_on_exit();
397 }
398 before_exit(thread);
399 vm_exit(code);
400 JVM_END
401
402
403 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
404 before_exit(thread);
405 vm_exit(code);
406 JVM_END
407
408
409 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
410 register_on_exit_function(func);
411 JVM_END
412
413
414 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
415 JVMWrapper("JVM_GC");
416 if (!DisableExplicitGC) {
417 Universe::heap()->collect(GCCause::_java_lang_system_gc);
418 }
419 JVM_END
420
421
422 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
423 JVMWrapper("JVM_MaxObjectInspectionAge");
424 return Universe::heap()->millis_since_last_gc();
425 JVM_END
426
427
428 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
429 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
430 JVM_END
431
432
433 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
434 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
435 JVM_END
436
437 static inline jlong convert_size_t_to_jlong(size_t val) {
438 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
439 NOT_LP64 (return (jlong)val;)
440 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
441 }
442
443 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
444 JVMWrapper("JVM_TotalMemory");
445 size_t n = Universe::heap()->capacity();
446 return convert_size_t_to_jlong(n);
447 JVM_END
448
449
450 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
451 JVMWrapper("JVM_FreeMemory");
452 CollectedHeap* ch = Universe::heap();
453 size_t n;
454 {
455 MutexLocker x(Heap_lock);
456 n = ch->capacity() - ch->used();
457 }
458 return convert_size_t_to_jlong(n);
459 JVM_END
460
461
462 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
463 JVMWrapper("JVM_MaxMemory");
464 size_t n = Universe::heap()->max_capacity();
465 return convert_size_t_to_jlong(n);
466 JVM_END
467
468
469 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
470 JVMWrapper("JVM_ActiveProcessorCount");
471 return os::active_processor_count();
472 JVM_END
473
474
475
476 // java.lang.Throwable //////////////////////////////////////////////////////
477
478
479 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
480 JVMWrapper("JVM_FillInStackTrace");
481 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
482 java_lang_Throwable::fill_in_stack_trace(exception);
483 JVM_END
484
485
486 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
487 JVMWrapper("JVM_GetStackTraceDepth");
488 oop exception = JNIHandles::resolve(throwable);
489 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
490 JVM_END
491
492
493 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
494 JVMWrapper("JVM_GetStackTraceElement");
495 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
496 oop exception = JNIHandles::resolve(throwable);
497 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
498 return JNIHandles::make_local(env, element);
499 JVM_END
500
501
502 // java.lang.Object ///////////////////////////////////////////////
503
504
505 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
506 JVMWrapper("JVM_IHashCode");
507 // as implemented in the classic virtual machine; return 0 if object is NULL
508 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
509 JVM_END
510
511
512 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
513 JVMWrapper("JVM_MonitorWait");
514 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
515 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
516 if (JvmtiExport::should_post_monitor_wait()) {
517 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
518
519 // The current thread already owns the monitor and it has not yet
520 // been added to the wait queue so the current thread cannot be
521 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
522 // event handler cannot accidentally consume an unpark() meant for
523 // the ParkEvent associated with this ObjectMonitor.
524 }
525 ObjectSynchronizer::wait(obj, ms, CHECK);
526 JVM_END
527
528
529 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
530 JVMWrapper("JVM_MonitorNotify");
531 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
532 ObjectSynchronizer::notify(obj, CHECK);
533 JVM_END
534
535
536 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
537 JVMWrapper("JVM_MonitorNotifyAll");
538 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
539 ObjectSynchronizer::notifyall(obj, CHECK);
540 JVM_END
541
542
543 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
544 JVMWrapper("JVM_Clone");
545 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
546 const KlassHandle klass (THREAD, obj->klass());
547 JvmtiVMObjectAllocEventCollector oam;
548
549 #ifdef ASSERT
550 // Just checking that the cloneable flag is set correct
551 if (obj->is_array()) {
552 guarantee(klass->is_cloneable(), "all arrays are cloneable");
553 } else {
554 guarantee(obj->is_instance(), "should be instanceOop");
555 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
556 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
557 }
558 #endif
559
560 // Check if class of obj supports the Cloneable interface.
561 // All arrays are considered to be cloneable (See JLS 20.1.5)
562 if (!klass->is_cloneable()) {
563 ResourceMark rm(THREAD);
564 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
565 }
566
567 // Make shallow object copy
568 const int size = obj->size();
569 oop new_obj = NULL;
570 if (obj->is_array()) {
571 const int length = ((arrayOop)obj())->length();
572 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
573 } else {
574 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
575 }
576 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
577 // is modifying a reference field in the clonee, a non-oop-atomic copy might
578 // be suspended in the middle of copying the pointer and end up with parts
579 // of two different pointers in the field. Subsequent dereferences will crash.
580 // 4846409: an oop-copy of objects with long or double fields or arrays of same
581 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
582 // of oops. We know objects are aligned on a minimum of an jlong boundary.
583 // The same is true of StubRoutines::object_copy and the various oop_copy
584 // variants, and of the code generated by the inline_native_clone intrinsic.
585 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
586 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
587 (size_t)align_object_size(size) / HeapWordsPerLong);
588 // Clear the header
589 new_obj->init_mark();
590
591 // Store check (mark entire object and let gc sort it out)
592 BarrierSet* bs = Universe::heap()->barrier_set();
593 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
594 bs->write_region(MemRegion((HeapWord*)new_obj, size));
595
596 // Caution: this involves a java upcall, so the clone should be
597 // "gc-robust" by this stage.
598 if (klass->has_finalizer()) {
599 assert(obj->is_instance(), "should be instanceOop");
600 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
601 }
602
603 return JNIHandles::make_local(env, oop(new_obj));
604 JVM_END
605
606 // java.lang.Compiler ////////////////////////////////////////////////////
607
608 // The initial cuts of the HotSpot VM will not support JITs, and all existing
609 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
610 // functions are all silently ignored unless JVM warnings are printed.
611
612 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
613 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
614 JVM_END
615
616
617 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
618 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
619 return JNI_FALSE;
620 JVM_END
621
622
623 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
624 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
625 return JNI_FALSE;
626 JVM_END
627
628
629 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
630 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
631 return JNI_FALSE;
632 JVM_END
633
634
635 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
636 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
637 return NULL;
638 JVM_END
639
640
641 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
642 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
643 JVM_END
644
645
646 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
647 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
648 JVM_END
649
650
651
652 // Error message support //////////////////////////////////////////////////////
653
654 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
655 JVMWrapper("JVM_GetLastErrorString");
656 return (jint)os::lasterror(buf, len);
657 JVM_END
658
659
660 // java.io.File ///////////////////////////////////////////////////////////////
661
662 JVM_LEAF(char*, JVM_NativePath(char* path))
663 JVMWrapper2("JVM_NativePath (%s)", path);
664 return os::native_path(path);
665 JVM_END
666
667
668 // Misc. class handling ///////////////////////////////////////////////////////////
669
670
671 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
672 JVMWrapper("JVM_GetCallerClass");
673
674 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
675 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
676 // temporarily for existing code to use until a replacement API is defined.
677 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
678 Klass* k = thread->security_get_caller_class(depth);
679 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
680 }
681
682 // Getting the class of the caller frame.
683 //
684 // The call stack at this point looks something like this:
685 //
686 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
687 // [1] [ @CallerSensitive API.method ]
688 // [.] [ (skipped intermediate frames) ]
689 // [n] [ caller ]
690 vframeStream vfst(thread);
691 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
692 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
693 Method* m = vfst.method();
694 assert(m != NULL, "sanity");
695 switch (n) {
696 case 0:
697 // This must only be called from Reflection.getCallerClass
698 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
699 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
700 }
701 // fall-through
702 case 1:
703 // Frame 0 and 1 must be caller sensitive.
704 if (!m->caller_sensitive()) {
705 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
706 }
707 break;
708 default:
709 if (!m->is_ignored_by_security_stack_walk()) {
710 // We have reached the desired frame; return the holder class.
711 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
712 }
713 break;
714 }
715 }
716 return NULL;
717 JVM_END
718
719
720 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
721 JVMWrapper("JVM_FindPrimitiveClass");
722 oop mirror = NULL;
723 BasicType t = name2type(utf);
724 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
725 mirror = Universe::java_mirror(t);
726 }
727 if (mirror == NULL) {
728 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
729 } else {
730 return (jclass) JNIHandles::make_local(env, mirror);
731 }
732 JVM_END
733
734
735 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
736 JVMWrapper("JVM_ResolveClass");
737 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
738 JVM_END
739
740
741 // Returns a class loaded by the bootstrap class loader; or null
742 // if not found. ClassNotFoundException is not thrown.
743 //
744 // Rationale behind JVM_FindClassFromBootLoader
745 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
746 // b> because of (a) java.dll has a direct dependecy on the unexported
747 // private symbol "_JVM_FindClassFromClassLoader@20".
748 // c> the launcher cannot use the private symbol as it dynamically opens
749 // the entry point, so if something changes, the launcher will fail
750 // unexpectedly at runtime, it is safest for the launcher to dlopen a
751 // stable exported interface.
752 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
753 // signature to change from _JVM_FindClassFromClassLoader@20 to
754 // JVM_FindClassFromClassLoader and will not be backward compatible
755 // with older JDKs.
756 // Thus a public/stable exported entry point is the right solution,
757 // public here means public in linker semantics, and is exported only
758 // to the JDK, and is not intended to be a public API.
759
760 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
761 const char* name))
762 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
763
764 // Java libraries should ensure that name is never null...
765 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
766 // It's impossible to create this class; the name cannot fit
767 // into the constant pool.
768 return NULL;
769 }
770
771 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
772 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
773 if (k == NULL) {
774 return NULL;
775 }
776
777 if (TraceClassResolution) {
778 trace_class_resolution(k);
779 }
780 return (jclass) JNIHandles::make_local(env, k->java_mirror());
781 JVM_END
782
783 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
784 jboolean init, jobject loader,
785 jboolean throwError))
786 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
787 throwError ? "error" : "exception");
788 // Java libraries should ensure that name is never null...
789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
790 // It's impossible to create this class; the name cannot fit
791 // into the constant pool.
792 if (throwError) {
793 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
794 } else {
795 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
796 }
797 }
798 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
799 Handle h_loader(THREAD, JNIHandles::resolve(loader));
800 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
801 Handle(), throwError, THREAD);
802
803 if (TraceClassResolution && result != NULL) {
804 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
805 }
806 return result;
807 JVM_END
808
809
810 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
811 jboolean init, jclass from))
812 JVMWrapper2("JVM_FindClassFromClass %s", name);
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
814 // It's impossible to create this class; the name cannot fit
815 // into the constant pool.
816 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
817 }
818 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
819 oop from_class_oop = JNIHandles::resolve(from);
820 Klass* from_class = (from_class_oop == NULL)
821 ? (Klass*)NULL
822 : java_lang_Class::as_Klass(from_class_oop);
823 oop class_loader = NULL;
824 oop protection_domain = NULL;
825 if (from_class != NULL) {
826 class_loader = from_class->class_loader();
827 protection_domain = from_class->protection_domain();
828 }
829 Handle h_loader(THREAD, class_loader);
830 Handle h_prot (THREAD, protection_domain);
831 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
832 h_prot, true, thread);
833
834 if (TraceClassResolution && result != NULL) {
835 // this function is generally only used for class loading during verification.
836 ResourceMark rm;
837 oop from_mirror = JNIHandles::resolve_non_null(from);
838 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
839 const char * from_name = from_class->external_name();
840
841 oop mirror = JNIHandles::resolve_non_null(result);
842 Klass* to_class = java_lang_Class::as_Klass(mirror);
843 const char * to = to_class->external_name();
844 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
845 }
846
847 return result;
848 JVM_END
849
850 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
851 if (loader.is_null()) {
852 return;
853 }
854
855 // check whether the current caller thread holds the lock or not.
856 // If not, increment the corresponding counter
857 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
858 ObjectSynchronizer::owner_self) {
859 counter->inc();
860 }
861 }
862
863 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
864 // and JVM_DefineClassWithSourceCond()
865 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
866 jobject loader, const jbyte *buf,
867 jsize len, jobject pd, const char *source,
868 jboolean verify, TRAPS) {
869 if (source == NULL) source = "__JVM_DefineClass__";
870
871 assert(THREAD->is_Java_thread(), "must be a JavaThread");
872 JavaThread* jt = (JavaThread*) THREAD;
873
874 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
875 ClassLoader::perf_define_appclass_selftime(),
876 ClassLoader::perf_define_appclasses(),
877 jt->get_thread_stat()->perf_recursion_counts_addr(),
878 jt->get_thread_stat()->perf_timers_addr(),
879 PerfClassTraceTime::DEFINE_CLASS);
880
881 if (UsePerfData) {
882 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
883 }
884
885 // Since exceptions can be thrown, class initialization can take place
886 // if name is NULL no check for class name in .class stream has to be made.
887 TempNewSymbol class_name = NULL;
888 if (name != NULL) {
889 const int str_len = (int)strlen(name);
890 if (str_len > Symbol::max_length()) {
891 // It's impossible to create this class; the name cannot fit
892 // into the constant pool.
893 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
894 }
895 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
896 }
897
898 ResourceMark rm(THREAD);
899 ClassFileStream st((u1*) buf, len, (char *)source);
900 Handle class_loader (THREAD, JNIHandles::resolve(loader));
901 if (UsePerfData) {
902 is_lock_held_by_thread(class_loader,
903 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
904 THREAD);
905 }
906 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
907 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
908 protection_domain, &st,
909 verify != 0,
910 CHECK_NULL);
911
912 if (TraceClassResolution && k != NULL) {
913 trace_class_resolution(k);
914 }
915
916 return (jclass) JNIHandles::make_local(env, k->java_mirror());
917 }
918
919
920 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
921 JVMWrapper2("JVM_DefineClass %s", name);
922
923 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
924 JVM_END
925
926
927 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
928 JVMWrapper2("JVM_DefineClassWithSource %s", name);
929
930 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
931 JVM_END
932
933 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
934 jobject loader, const jbyte *buf,
935 jsize len, jobject pd,
936 const char *source, jboolean verify))
937 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
938
939 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
940 JVM_END
941
942 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
943 JVMWrapper("JVM_FindLoadedClass");
944 ResourceMark rm(THREAD);
945
946 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
947 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
948
949 const char* str = java_lang_String::as_utf8_string(string());
950 // Sanity check, don't expect null
951 if (str == NULL) return NULL;
952
953 const int str_len = (int)strlen(str);
954 if (str_len > Symbol::max_length()) {
955 // It's impossible to create this class; the name cannot fit
956 // into the constant pool.
957 return NULL;
958 }
959 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
960
961 // Security Note:
962 // The Java level wrapper will perform the necessary security check allowing
963 // us to pass the NULL as the initiating class loader.
964 Handle h_loader(THREAD, JNIHandles::resolve(loader));
965 if (UsePerfData) {
966 is_lock_held_by_thread(h_loader,
967 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
968 THREAD);
969 }
970
971 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
972 h_loader,
973 Handle(),
974 CHECK_NULL);
975
976 return (k == NULL) ? NULL :
977 (jclass) JNIHandles::make_local(env, k->java_mirror());
978 JVM_END
979
980
981 // Reflection support //////////////////////////////////////////////////////////////////////////////
982
983 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
984 assert (cls != NULL, "illegal class");
985 JVMWrapper("JVM_GetClassName");
986 JvmtiVMObjectAllocEventCollector oam;
987 ResourceMark rm(THREAD);
988 const char* name;
989 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
990 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
991 } else {
992 // Consider caching interned string in Klass
993 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
994 assert(k->is_klass(), "just checking");
995 name = k->external_name();
996 }
997 oop result = StringTable::intern((char*) name, CHECK_NULL);
998 return (jstring) JNIHandles::make_local(env, result);
999 JVM_END
1000
1001
1002 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1003 JVMWrapper("JVM_GetClassInterfaces");
1004 JvmtiVMObjectAllocEventCollector oam;
1005 oop mirror = JNIHandles::resolve_non_null(cls);
1006
1007 // Special handling for primitive objects
1008 if (java_lang_Class::is_primitive(mirror)) {
1009 // Primitive objects does not have any interfaces
1010 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1011 return (jobjectArray) JNIHandles::make_local(env, r);
1012 }
1013
1014 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1015 // Figure size of result array
1016 int size;
1017 if (klass->oop_is_instance()) {
1018 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1019 } else {
1020 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1021 size = 2;
1022 }
1023
1024 // Allocate result array
1025 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1026 objArrayHandle result (THREAD, r);
1027 // Fill in result
1028 if (klass->oop_is_instance()) {
1029 // Regular instance klass, fill in all local interfaces
1030 for (int index = 0; index < size; index++) {
1031 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1032 result->obj_at_put(index, k->java_mirror());
1033 }
1034 } else {
1035 // All arrays implement java.lang.Cloneable and java.io.Serializable
1036 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1037 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1038 }
1039 return (jobjectArray) JNIHandles::make_local(env, result());
1040 JVM_END
1041
1042
1043 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1044 JVMWrapper("JVM_GetClassLoader");
1045 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1046 return NULL;
1047 }
1048 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1049 oop loader = k->class_loader();
1050 return JNIHandles::make_local(env, loader);
1051 JVM_END
1052
1053
1054 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1055 JVMWrapper("JVM_IsInterface");
1056 oop mirror = JNIHandles::resolve_non_null(cls);
1057 if (java_lang_Class::is_primitive(mirror)) {
1058 return JNI_FALSE;
1059 }
1060 Klass* k = java_lang_Class::as_Klass(mirror);
1061 jboolean result = k->is_interface();
1062 assert(!result || k->oop_is_instance(),
1063 "all interfaces are instance types");
1064 // The compiler intrinsic for isInterface tests the
1065 // Klass::_access_flags bits in the same way.
1066 return result;
1067 JVM_END
1068
1069
1070 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1071 JVMWrapper("JVM_GetClassSigners");
1072 JvmtiVMObjectAllocEventCollector oam;
1073 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1074 // There are no signers for primitive types
1075 return NULL;
1076 }
1077
1078 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1079
1080 // If there are no signers set in the class, or if the class
1081 // is an array, return NULL.
1082 if (signers == NULL) return NULL;
1083
1084 // copy of the signers array
1085 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1086 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1087 for (int index = 0; index < signers->length(); index++) {
1088 signers_copy->obj_at_put(index, signers->obj_at(index));
1089 }
1090
1091 // return the copy
1092 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1093 JVM_END
1094
1095
1096 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1097 JVMWrapper("JVM_SetClassSigners");
1098 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1099 // This call is ignored for primitive types and arrays.
1100 // Signers are only set once, ClassLoader.java, and thus shouldn't
1101 // be called with an array. Only the bootstrap loader creates arrays.
1102 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1103 if (k->oop_is_instance()) {
1104 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1105 }
1106 }
1107 JVM_END
1108
1109
1110 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1111 JVMWrapper("JVM_GetProtectionDomain");
1112 if (JNIHandles::resolve(cls) == NULL) {
1113 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1114 }
1115
1116 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1117 // Primitive types does not have a protection domain.
1118 return NULL;
1119 }
1120
1121 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1122 return (jobject) JNIHandles::make_local(env, pd);
1123 JVM_END
1124
1125
1126 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1127 // If there is a security manager and protection domain, check the access
1128 // in the protection domain, otherwise it is authorized.
1129 if (java_lang_System::has_security_manager()) {
1130
1131 // For bootstrapping, if pd implies method isn't in the JDK, allow
1132 // this context to revert to older behavior.
1133 // In this case the isAuthorized field in AccessControlContext is also not
1134 // present.
1135 if (Universe::protection_domain_implies_method() == NULL) {
1136 return true;
1137 }
1138
1139 // Whitelist certain access control contexts
1140 if (java_security_AccessControlContext::is_authorized(context)) {
1141 return true;
1142 }
1143
1144 oop prot = klass->protection_domain();
1145 if (prot != NULL) {
1146 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1147 // in the new wrapper.
1148 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1149 Handle h_prot(THREAD, prot);
1150 JavaValue result(T_BOOLEAN);
1151 JavaCallArguments args(h_prot);
1152 JavaCalls::call(&result, m, &args, CHECK_false);
1153 return (result.get_jboolean() != 0);
1154 }
1155 }
1156 return true;
1157 }
1158
1159 // Create an AccessControlContext with a protection domain with null codesource
1160 // and null permissions - which gives no permissions.
1161 oop create_dummy_access_control_context(TRAPS) {
1162 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1163 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1164 // Call constructor ProtectionDomain(null, null);
1165 JavaValue result(T_VOID);
1166 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1167 vmSymbols::object_initializer_name(),
1168 vmSymbols::codesource_permissioncollection_signature(),
1169 Handle(), Handle(), CHECK_NULL);
1170
1171 // new ProtectionDomain[] {pd};
1172 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1173 context->obj_at_put(0, obj());
1174
1175 // new AccessControlContext(new ProtectionDomain[] {pd})
1176 objArrayHandle h_context(THREAD, context);
1177 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1178 return acc;
1179 }
1180
1181 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1182 JVMWrapper("JVM_DoPrivileged");
1183
1184 if (action == NULL) {
1185 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1186 }
1187
1188 // Compute the frame initiating the do privileged operation and setup the privileged stack
1189 vframeStream vfst(thread);
1190 vfst.security_get_caller_frame(1);
1191
1192 if (vfst.at_end()) {
1193 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1194 }
1195
1196 Method* method = vfst.method();
1197 instanceKlassHandle klass (THREAD, method->method_holder());
1198
1199 // Check that action object understands "Object run()"
1200 Handle h_context;
1201 if (context != NULL) {
1202 h_context = Handle(THREAD, JNIHandles::resolve(context));
1203 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1204 if (!authorized) {
1205 // Create an unprivileged access control object and call it's run function
1206 // instead.
1207 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1208 h_context = Handle(THREAD, noprivs);
1209 }
1210 }
1211
1212 // Check that action object understands "Object run()"
1213 Handle object (THREAD, JNIHandles::resolve(action));
1214
1215 // get run() method
1216 Method* m_oop = object->klass()->uncached_lookup_method(
1217 vmSymbols::run_method_name(),
1218 vmSymbols::void_object_signature());
1219 methodHandle m (THREAD, m_oop);
1220 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1221 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1222 }
1223
1224 // Stack allocated list of privileged stack elements
1225 PrivilegedElement pi;
1226 if (!vfst.at_end()) {
1227 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1228 thread->set_privileged_stack_top(&pi);
1229 }
1230
1231
1232 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1233 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1234 Handle pending_exception;
1235 JavaValue result(T_OBJECT);
1236 JavaCallArguments args(object);
1237 JavaCalls::call(&result, m, &args, THREAD);
1238
1239 // done with action, remove ourselves from the list
1240 if (!vfst.at_end()) {
1241 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1242 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1243 }
1244
1245 if (HAS_PENDING_EXCEPTION) {
1246 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1247 CLEAR_PENDING_EXCEPTION;
1248 // JVMTI has already reported the pending exception
1249 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1250 if (THREAD->is_Java_thread()) {
1251 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1252 }
1253 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1254 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1255 // Throw a java.security.PrivilegedActionException(Exception e) exception
1256 JavaCallArguments args(pending_exception);
1257 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1258 vmSymbols::exception_void_signature(),
1259 &args);
1260 }
1261 }
1262
1263 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1264 return JNIHandles::make_local(env, (oop) result.get_jobject());
1265 JVM_END
1266
1267
1268 // Returns the inherited_access_control_context field of the running thread.
1269 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1270 JVMWrapper("JVM_GetInheritedAccessControlContext");
1271 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1272 return JNIHandles::make_local(env, result);
1273 JVM_END
1274
1275 class RegisterArrayForGC {
1276 private:
1277 JavaThread *_thread;
1278 public:
1279 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1280 _thread = thread;
1281 _thread->register_array_for_gc(array);
1282 }
1283
1284 ~RegisterArrayForGC() {
1285 _thread->register_array_for_gc(NULL);
1286 }
1287 };
1288
1289
1290 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1291 JVMWrapper("JVM_GetStackAccessControlContext");
1292 if (!UsePrivilegedStack) return NULL;
1293
1294 ResourceMark rm(THREAD);
1295 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1296 JvmtiVMObjectAllocEventCollector oam;
1297
1298 // count the protection domains on the execution stack. We collapse
1299 // duplicate consecutive protection domains into a single one, as
1300 // well as stopping when we hit a privileged frame.
1301
1302 // Use vframeStream to iterate through Java frames
1303 vframeStream vfst(thread);
1304
1305 oop previous_protection_domain = NULL;
1306 Handle privileged_context(thread, NULL);
1307 bool is_privileged = false;
1308 oop protection_domain = NULL;
1309
1310 for(; !vfst.at_end(); vfst.next()) {
1311 // get method of frame
1312 Method* method = vfst.method();
1313 intptr_t* frame_id = vfst.frame_id();
1314
1315 // check the privileged frames to see if we have a match
1316 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1317 // this frame is privileged
1318 is_privileged = true;
1319 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1320 protection_domain = thread->privileged_stack_top()->protection_domain();
1321 } else {
1322 protection_domain = method->method_holder()->protection_domain();
1323 }
1324
1325 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1326 local_array->push(protection_domain);
1327 previous_protection_domain = protection_domain;
1328 }
1329
1330 if (is_privileged) break;
1331 }
1332
1333
1334 // either all the domains on the stack were system domains, or
1335 // we had a privileged system domain
1336 if (local_array->is_empty()) {
1337 if (is_privileged && privileged_context.is_null()) return NULL;
1338
1339 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1340 return JNIHandles::make_local(env, result);
1341 }
1342
1343 // the resource area must be registered in case of a gc
1344 RegisterArrayForGC ragc(thread, local_array);
1345 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1346 local_array->length(), CHECK_NULL);
1347 objArrayHandle h_context(thread, context);
1348 for (int index = 0; index < local_array->length(); index++) {
1349 h_context->obj_at_put(index, local_array->at(index));
1350 }
1351
1352 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1353
1354 return JNIHandles::make_local(env, result);
1355 JVM_END
1356
1357
1358 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1359 JVMWrapper("JVM_IsArrayClass");
1360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1361 return (k != NULL) && k->oop_is_array() ? true : false;
1362 JVM_END
1363
1364
1365 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1366 JVMWrapper("JVM_IsPrimitiveClass");
1367 oop mirror = JNIHandles::resolve_non_null(cls);
1368 return (jboolean) java_lang_Class::is_primitive(mirror);
1369 JVM_END
1370
1371
1372 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1373 JVMWrapper("JVM_GetComponentType");
1374 oop mirror = JNIHandles::resolve_non_null(cls);
1375 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1376 return (jclass) JNIHandles::make_local(env, result);
1377 JVM_END
1378
1379
1380 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1381 JVMWrapper("JVM_GetClassModifiers");
1382 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1383 // Primitive type
1384 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1385 }
1386
1387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1388 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1389 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1390 return k->modifier_flags();
1391 JVM_END
1392
1393
1394 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1395
1396 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1397 JvmtiVMObjectAllocEventCollector oam;
1398 // ofClass is a reference to a java_lang_Class object. The mirror object
1399 // of an InstanceKlass
1400
1401 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1402 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1403 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1404 return (jobjectArray)JNIHandles::make_local(env, result);
1405 }
1406
1407 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1408 InnerClassesIterator iter(k);
1409
1410 if (iter.length() == 0) {
1411 // Neither an inner nor outer class
1412 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1413 return (jobjectArray)JNIHandles::make_local(env, result);
1414 }
1415
1416 // find inner class info
1417 constantPoolHandle cp(thread, k->constants());
1418 int length = iter.length();
1419
1420 // Allocate temp. result array
1421 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1422 objArrayHandle result (THREAD, r);
1423 int members = 0;
1424
1425 for (; !iter.done(); iter.next()) {
1426 int ioff = iter.inner_class_info_index();
1427 int ooff = iter.outer_class_info_index();
1428
1429 if (ioff != 0 && ooff != 0) {
1430 // Check to see if the name matches the class we're looking for
1431 // before attempting to find the class.
1432 if (cp->klass_name_at_matches(k, ooff)) {
1433 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1434 if (outer_klass == k()) {
1435 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1436 instanceKlassHandle inner_klass (THREAD, ik);
1437
1438 // Throws an exception if outer klass has not declared k as
1439 // an inner klass
1440 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1441
1442 result->obj_at_put(members, inner_klass->java_mirror());
1443 members++;
1444 }
1445 }
1446 }
1447 }
1448
1449 if (members != length) {
1450 // Return array of right length
1451 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1452 for(int i = 0; i < members; i++) {
1453 res->obj_at_put(i, result->obj_at(i));
1454 }
1455 return (jobjectArray)JNIHandles::make_local(env, res);
1456 }
1457
1458 return (jobjectArray)JNIHandles::make_local(env, result());
1459 JVM_END
1460
1461
1462 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1463 {
1464 // ofClass is a reference to a java_lang_Class object.
1465 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1466 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1467 return NULL;
1468 }
1469
1470 bool inner_is_member = false;
1471 Klass* outer_klass
1472 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1473 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1474 if (outer_klass == NULL) return NULL; // already a top-level class
1475 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1476 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1477 }
1478 JVM_END
1479
1480 // should be in InstanceKlass.cpp, but is here for historical reasons
1481 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1482 bool* inner_is_member,
1483 TRAPS) {
1484 Thread* thread = THREAD;
1485 InnerClassesIterator iter(k);
1486 if (iter.length() == 0) {
1487 // No inner class info => no declaring class
1488 return NULL;
1489 }
1490
1491 constantPoolHandle i_cp(thread, k->constants());
1492
1493 bool found = false;
1494 Klass* ok;
1495 instanceKlassHandle outer_klass;
1496 *inner_is_member = false;
1497
1498 // Find inner_klass attribute
1499 for (; !iter.done() && !found; iter.next()) {
1500 int ioff = iter.inner_class_info_index();
1501 int ooff = iter.outer_class_info_index();
1502 int noff = iter.inner_name_index();
1503 if (ioff != 0) {
1504 // Check to see if the name matches the class we're looking for
1505 // before attempting to find the class.
1506 if (i_cp->klass_name_at_matches(k, ioff)) {
1507 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1508 found = (k() == inner_klass);
1509 if (found && ooff != 0) {
1510 ok = i_cp->klass_at(ooff, CHECK_NULL);
1511 outer_klass = instanceKlassHandle(thread, ok);
1512 *inner_is_member = true;
1513 }
1514 }
1515 }
1516 }
1517
1518 if (found && outer_klass.is_null()) {
1519 // It may be anonymous; try for that.
1520 int encl_method_class_idx = k->enclosing_method_class_index();
1521 if (encl_method_class_idx != 0) {
1522 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1523 outer_klass = instanceKlassHandle(thread, ok);
1524 *inner_is_member = false;
1525 }
1526 }
1527
1528 // If no inner class attribute found for this class.
1529 if (outer_klass.is_null()) return NULL;
1530
1531 // Throws an exception if outer klass has not declared k as an inner klass
1532 // We need evidence that each klass knows about the other, or else
1533 // the system could allow a spoof of an inner class to gain access rights.
1534 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1535 return outer_klass();
1536 }
1537
1538 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1539 assert (cls != NULL, "illegal class");
1540 JVMWrapper("JVM_GetClassSignature");
1541 JvmtiVMObjectAllocEventCollector oam;
1542 ResourceMark rm(THREAD);
1543 // Return null for arrays and primatives
1544 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1545 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1546 if (k->oop_is_instance()) {
1547 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1548 if (sym == NULL) return NULL;
1549 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1550 return (jstring) JNIHandles::make_local(env, str());
1551 }
1552 }
1553 return NULL;
1554 JVM_END
1555
1556
1557 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1558 assert (cls != NULL, "illegal class");
1559 JVMWrapper("JVM_GetClassAnnotations");
1560
1561 // Return null for arrays and primitives
1562 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1563 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1564 if (k->oop_is_instance()) {
1565 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1566 return (jbyteArray) JNIHandles::make_local(env, a);
1567 }
1568 }
1569 return NULL;
1570 JVM_END
1571
1572
1573 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1574 // some of this code was adapted from from jni_FromReflectedField
1575
1576 oop reflected = JNIHandles::resolve_non_null(field);
1577 oop mirror = java_lang_reflect_Field::clazz(reflected);
1578 Klass* k = java_lang_Class::as_Klass(mirror);
1579 int slot = java_lang_reflect_Field::slot(reflected);
1580 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1581
1582 KlassHandle kh(THREAD, k);
1583 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1584
1585 if (modifiers & JVM_ACC_STATIC) {
1586 // for static fields we only look in the current class
1587 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1588 assert(false, "cannot find static field");
1589 return false;
1590 }
1591 } else {
1592 // for instance fields we start with the current class and work
1593 // our way up through the superclass chain
1594 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1595 assert(false, "cannot find instance field");
1596 return false;
1597 }
1598 }
1599 return true;
1600 }
1601
1602 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1603 // field is a handle to a java.lang.reflect.Field object
1604 assert(field != NULL, "illegal field");
1605 JVMWrapper("JVM_GetFieldAnnotations");
1606
1607 fieldDescriptor fd;
1608 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1609 if (!gotFd) {
1610 return NULL;
1611 }
1612
1613 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1614 JVM_END
1615
1616
1617 static Method* jvm_get_method_common(jobject method) {
1618 // some of this code was adapted from from jni_FromReflectedMethod
1619
1620 oop reflected = JNIHandles::resolve_non_null(method);
1621 oop mirror = NULL;
1622 int slot = 0;
1623
1624 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1625 mirror = java_lang_reflect_Constructor::clazz(reflected);
1626 slot = java_lang_reflect_Constructor::slot(reflected);
1627 } else {
1628 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1629 "wrong type");
1630 mirror = java_lang_reflect_Method::clazz(reflected);
1631 slot = java_lang_reflect_Method::slot(reflected);
1632 }
1633 Klass* k = java_lang_Class::as_Klass(mirror);
1634
1635 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1636 assert(m != NULL, "cannot find method");
1637 return m; // caller has to deal with NULL in product mode
1638 }
1639
1640
1641 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1642 JVMWrapper("JVM_GetMethodAnnotations");
1643
1644 // method is a handle to a java.lang.reflect.Method object
1645 Method* m = jvm_get_method_common(method);
1646 if (m == NULL) {
1647 return NULL;
1648 }
1649
1650 return (jbyteArray) JNIHandles::make_local(env,
1651 Annotations::make_java_array(m->annotations(), THREAD));
1652 JVM_END
1653
1654
1655 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1656 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1657
1658 // method is a handle to a java.lang.reflect.Method object
1659 Method* m = jvm_get_method_common(method);
1660 if (m == NULL) {
1661 return NULL;
1662 }
1663
1664 return (jbyteArray) JNIHandles::make_local(env,
1665 Annotations::make_java_array(m->annotation_default(), THREAD));
1666 JVM_END
1667
1668
1669 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1670 JVMWrapper("JVM_GetMethodParameterAnnotations");
1671
1672 // method is a handle to a java.lang.reflect.Method object
1673 Method* m = jvm_get_method_common(method);
1674 if (m == NULL) {
1675 return NULL;
1676 }
1677
1678 return (jbyteArray) JNIHandles::make_local(env,
1679 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1680 JVM_END
1681
1682 /* Type use annotations support (JDK 1.8) */
1683
1684 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1685 assert (cls != NULL, "illegal class");
1686 JVMWrapper("JVM_GetClassTypeAnnotations");
1687 ResourceMark rm(THREAD);
1688 // Return null for arrays and primitives
1689 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1690 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1691 if (k->oop_is_instance()) {
1692 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1693 if (type_annotations != NULL) {
1694 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1695 return (jbyteArray) JNIHandles::make_local(env, a);
1696 }
1697 }
1698 }
1699 return NULL;
1700 JVM_END
1701
1702 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1703 assert (method != NULL, "illegal method");
1704 JVMWrapper("JVM_GetMethodTypeAnnotations");
1705
1706 // method is a handle to a java.lang.reflect.Method object
1707 Method* m = jvm_get_method_common(method);
1708 if (m == NULL) {
1709 return NULL;
1710 }
1711
1712 AnnotationArray* type_annotations = m->type_annotations();
1713 if (type_annotations != NULL) {
1714 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1715 return (jbyteArray) JNIHandles::make_local(env, a);
1716 }
1717
1718 return NULL;
1719 JVM_END
1720
1721 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1722 assert (field != NULL, "illegal field");
1723 JVMWrapper("JVM_GetFieldTypeAnnotations");
1724
1725 fieldDescriptor fd;
1726 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1727 if (!gotFd) {
1728 return NULL;
1729 }
1730
1731 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1732 JVM_END
1733
1734 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1735 if (!cp->is_within_bounds(index)) {
1736 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1737 }
1738 }
1739
1740 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1741 {
1742 JVMWrapper("JVM_GetMethodParameters");
1743 // method is a handle to a java.lang.reflect.Method object
1744 Method* method_ptr = jvm_get_method_common(method);
1745 methodHandle mh (THREAD, method_ptr);
1746 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1747 const int num_params = mh->method_parameters_length();
1748
1749 if (0 != num_params) {
1750 // make sure all the symbols are properly formatted
1751 for (int i = 0; i < num_params; i++) {
1752 MethodParametersElement* params = mh->method_parameters_start();
1753 int index = params[i].name_cp_index;
1754 bounds_check(mh->constants(), index, CHECK_NULL);
1755
1756 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1757 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1758 "Wrong type at constant pool index");
1759 }
1760
1761 }
1762
1763 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1764 objArrayHandle result (THREAD, result_oop);
1765
1766 for (int i = 0; i < num_params; i++) {
1767 MethodParametersElement* params = mh->method_parameters_start();
1768 // For a 0 index, give a NULL symbol
1769 Symbol* sym = 0 != params[i].name_cp_index ?
1770 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1771 int flags = params[i].flags;
1772 oop param = Reflection::new_parameter(reflected_method, i, sym,
1773 flags, CHECK_NULL);
1774 result->obj_at_put(i, param);
1775 }
1776 return (jobjectArray)JNIHandles::make_local(env, result());
1777 } else {
1778 return (jobjectArray)NULL;
1779 }
1780 }
1781 JVM_END
1782
1783 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1784
1785 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1786 {
1787 JVMWrapper("JVM_GetClassDeclaredFields");
1788 JvmtiVMObjectAllocEventCollector oam;
1789
1790 // Exclude primitive types and array types
1791 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1792 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1793 // Return empty array
1794 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1795 return (jobjectArray) JNIHandles::make_local(env, res);
1796 }
1797
1798 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1799 constantPoolHandle cp(THREAD, k->constants());
1800
1801 // Ensure class is linked
1802 k->link_class(CHECK_NULL);
1803
1804 // 4496456 We need to filter out java.lang.Throwable.backtrace
1805 bool skip_backtrace = false;
1806
1807 // Allocate result
1808 int num_fields;
1809
1810 if (publicOnly) {
1811 num_fields = 0;
1812 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1813 if (fs.access_flags().is_public()) ++num_fields;
1814 }
1815 } else {
1816 num_fields = k->java_fields_count();
1817
1818 if (k() == SystemDictionary::Throwable_klass()) {
1819 num_fields--;
1820 skip_backtrace = true;
1821 }
1822 }
1823
1824 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1825 objArrayHandle result (THREAD, r);
1826
1827 int out_idx = 0;
1828 fieldDescriptor fd;
1829 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1830 if (skip_backtrace) {
1831 // 4496456 skip java.lang.Throwable.backtrace
1832 int offset = fs.offset();
1833 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1834 }
1835
1836 if (!publicOnly || fs.access_flags().is_public()) {
1837 fd.reinitialize(k(), fs.index());
1838 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1839 result->obj_at_put(out_idx, field);
1840 ++out_idx;
1841 }
1842 }
1843 assert(out_idx == num_fields, "just checking");
1844 return (jobjectArray) JNIHandles::make_local(env, result());
1845 }
1846 JVM_END
1847
1848 static bool select_method(methodHandle method, bool want_constructor) {
1849 if (want_constructor) {
1850 return (method->is_initializer() && !method->is_static());
1851 } else {
1852 return (!method->is_initializer() && !method->is_overpass());
1853 }
1854 }
1855
1856 static jobjectArray get_class_declared_methods_helper(
1857 JNIEnv *env,
1858 jclass ofClass, jboolean publicOnly,
1859 bool want_constructor,
1860 Klass* klass, TRAPS) {
1861
1862 JvmtiVMObjectAllocEventCollector oam;
1863
1864 // Exclude primitive types and array types
1865 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1866 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1867 // Return empty array
1868 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1869 return (jobjectArray) JNIHandles::make_local(env, res);
1870 }
1871
1872 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1873
1874 // Ensure class is linked
1875 k->link_class(CHECK_NULL);
1876
1877 Array<Method*>* methods = k->methods();
1878 int methods_length = methods->length();
1879
1880 // Save original method_idnum in case of redefinition, which can change
1881 // the idnum of obsolete methods. The new method will have the same idnum
1882 // but if we refresh the methods array, the counts will be wrong.
1883 ResourceMark rm(THREAD);
1884 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1885 int num_methods = 0;
1886
1887 for (int i = 0; i < methods_length; i++) {
1888 methodHandle method(THREAD, methods->at(i));
1889 if (select_method(method, want_constructor)) {
1890 if (!publicOnly || method->is_public()) {
1891 idnums->push(method->method_idnum());
1892 ++num_methods;
1893 }
1894 }
1895 }
1896
1897 // Allocate result
1898 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1899 objArrayHandle result (THREAD, r);
1900
1901 // Now just put the methods that we selected above, but go by their idnum
1902 // in case of redefinition. The methods can be redefined at any safepoint,
1903 // so above when allocating the oop array and below when creating reflect
1904 // objects.
1905 for (int i = 0; i < num_methods; i++) {
1906 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1907 if (method.is_null()) {
1908 // Method may have been deleted and seems this API can handle null
1909 // Otherwise should probably put a method that throws NSME
1910 result->obj_at_put(i, NULL);
1911 } else {
1912 oop m;
1913 if (want_constructor) {
1914 m = Reflection::new_constructor(method, CHECK_NULL);
1915 } else {
1916 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1917 }
1918 result->obj_at_put(i, m);
1919 }
1920 }
1921
1922 return (jobjectArray) JNIHandles::make_local(env, result());
1923 }
1924
1925 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1926 {
1927 JVMWrapper("JVM_GetClassDeclaredMethods");
1928 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1929 /*want_constructor*/ false,
1930 SystemDictionary::reflect_Method_klass(), THREAD);
1931 }
1932 JVM_END
1933
1934 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1935 {
1936 JVMWrapper("JVM_GetClassDeclaredConstructors");
1937 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1938 /*want_constructor*/ true,
1939 SystemDictionary::reflect_Constructor_klass(), THREAD);
1940 }
1941 JVM_END
1942
1943 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1944 {
1945 JVMWrapper("JVM_GetClassAccessFlags");
1946 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1947 // Primitive type
1948 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1949 }
1950
1951 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1952 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1953 }
1954 JVM_END
1955
1956
1957 // Constant pool access //////////////////////////////////////////////////////////
1958
1959 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1960 {
1961 JVMWrapper("JVM_GetClassConstantPool");
1962 JvmtiVMObjectAllocEventCollector oam;
1963
1964 // Return null for primitives and arrays
1965 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1966 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1967 if (k->oop_is_instance()) {
1968 instanceKlassHandle k_h(THREAD, k);
1969 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1970 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1971 return JNIHandles::make_local(jcp());
1972 }
1973 }
1974 return NULL;
1975 }
1976 JVM_END
1977
1978
1979 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1980 {
1981 JVMWrapper("JVM_ConstantPoolGetSize");
1982 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1983 return cp->length();
1984 }
1985 JVM_END
1986
1987
1988 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1989 {
1990 JVMWrapper("JVM_ConstantPoolGetClassAt");
1991 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1992 bounds_check(cp, index, CHECK_NULL);
1993 constantTag tag = cp->tag_at(index);
1994 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1995 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1996 }
1997 Klass* k = cp->klass_at(index, CHECK_NULL);
1998 return (jclass) JNIHandles::make_local(k->java_mirror());
1999 }
2000 JVM_END
2001
2002 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2003 {
2004 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2005 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2006 bounds_check(cp, index, CHECK_NULL);
2007 constantTag tag = cp->tag_at(index);
2008 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2009 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2010 }
2011 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2012 if (k == NULL) return NULL;
2013 return (jclass) JNIHandles::make_local(k->java_mirror());
2014 }
2015 JVM_END
2016
2017 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2018 constantTag tag = cp->tag_at(index);
2019 if (!tag.is_method() && !tag.is_interface_method()) {
2020 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2021 }
2022 int klass_ref = cp->uncached_klass_ref_index_at(index);
2023 Klass* k_o;
2024 if (force_resolution) {
2025 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2026 } else {
2027 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2028 if (k_o == NULL) return NULL;
2029 }
2030 instanceKlassHandle k(THREAD, k_o);
2031 Symbol* name = cp->uncached_name_ref_at(index);
2032 Symbol* sig = cp->uncached_signature_ref_at(index);
2033 methodHandle m (THREAD, k->find_method(name, sig));
2034 if (m.is_null()) {
2035 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2036 }
2037 oop method;
2038 if (!m->is_initializer() || m->is_static()) {
2039 method = Reflection::new_method(m, true, true, CHECK_NULL);
2040 } else {
2041 method = Reflection::new_constructor(m, CHECK_NULL);
2042 }
2043 return JNIHandles::make_local(method);
2044 }
2045
2046 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2047 {
2048 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2049 JvmtiVMObjectAllocEventCollector oam;
2050 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2051 bounds_check(cp, index, CHECK_NULL);
2052 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2053 return res;
2054 }
2055 JVM_END
2056
2057 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2058 {
2059 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2060 JvmtiVMObjectAllocEventCollector oam;
2061 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2062 bounds_check(cp, index, CHECK_NULL);
2063 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2064 return res;
2065 }
2066 JVM_END
2067
2068 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2069 constantTag tag = cp->tag_at(index);
2070 if (!tag.is_field()) {
2071 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2072 }
2073 int klass_ref = cp->uncached_klass_ref_index_at(index);
2074 Klass* k_o;
2075 if (force_resolution) {
2076 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2077 } else {
2078 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2079 if (k_o == NULL) return NULL;
2080 }
2081 instanceKlassHandle k(THREAD, k_o);
2082 Symbol* name = cp->uncached_name_ref_at(index);
2083 Symbol* sig = cp->uncached_signature_ref_at(index);
2084 fieldDescriptor fd;
2085 Klass* target_klass = k->find_field(name, sig, &fd);
2086 if (target_klass == NULL) {
2087 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2088 }
2089 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2090 return JNIHandles::make_local(field);
2091 }
2092
2093 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2094 {
2095 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2096 JvmtiVMObjectAllocEventCollector oam;
2097 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2098 bounds_check(cp, index, CHECK_NULL);
2099 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2100 return res;
2101 }
2102 JVM_END
2103
2104 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2105 {
2106 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2107 JvmtiVMObjectAllocEventCollector oam;
2108 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2109 bounds_check(cp, index, CHECK_NULL);
2110 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2111 return res;
2112 }
2113 JVM_END
2114
2115 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2118 JvmtiVMObjectAllocEventCollector oam;
2119 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_NULL);
2121 constantTag tag = cp->tag_at(index);
2122 if (!tag.is_field_or_method()) {
2123 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124 }
2125 int klass_ref = cp->uncached_klass_ref_index_at(index);
2126 Symbol* klass_name = cp->klass_name_at(klass_ref);
2127 Symbol* member_name = cp->uncached_name_ref_at(index);
2128 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2129 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2130 objArrayHandle dest(THREAD, dest_o);
2131 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2132 dest->obj_at_put(0, str());
2133 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2134 dest->obj_at_put(1, str());
2135 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2136 dest->obj_at_put(2, str());
2137 return (jobjectArray) JNIHandles::make_local(dest());
2138 }
2139 JVM_END
2140
2141 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2142 {
2143 JVMWrapper("JVM_ConstantPoolGetIntAt");
2144 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2145 bounds_check(cp, index, CHECK_0);
2146 constantTag tag = cp->tag_at(index);
2147 if (!tag.is_int()) {
2148 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2149 }
2150 return cp->int_at(index);
2151 }
2152 JVM_END
2153
2154 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2155 {
2156 JVMWrapper("JVM_ConstantPoolGetLongAt");
2157 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2158 bounds_check(cp, index, CHECK_(0L));
2159 constantTag tag = cp->tag_at(index);
2160 if (!tag.is_long()) {
2161 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2162 }
2163 return cp->long_at(index);
2164 }
2165 JVM_END
2166
2167 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2168 {
2169 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2170 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_(0.0f));
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_float()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 return cp->float_at(index);
2177 }
2178 JVM_END
2179
2180 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2181 {
2182 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2183 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2184 bounds_check(cp, index, CHECK_(0.0));
2185 constantTag tag = cp->tag_at(index);
2186 if (!tag.is_double()) {
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2188 }
2189 return cp->double_at(index);
2190 }
2191 JVM_END
2192
2193 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2194 {
2195 JVMWrapper("JVM_ConstantPoolGetStringAt");
2196 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_NULL);
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_string()) {
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 oop str = cp->string_at(index, CHECK_NULL);
2203 return (jstring) JNIHandles::make_local(str);
2204 }
2205 JVM_END
2206
2207 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2208 {
2209 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2210 JvmtiVMObjectAllocEventCollector oam;
2211 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2212 bounds_check(cp, index, CHECK_NULL);
2213 constantTag tag = cp->tag_at(index);
2214 if (!tag.is_symbol()) {
2215 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2216 }
2217 Symbol* sym = cp->symbol_at(index);
2218 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2219 return (jstring) JNIHandles::make_local(str());
2220 }
2221 JVM_END
2222
2223
2224 // Assertion support. //////////////////////////////////////////////////////////
2225
2226 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2227 JVMWrapper("JVM_DesiredAssertionStatus");
2228 assert(cls != NULL, "bad class");
2229
2230 oop r = JNIHandles::resolve(cls);
2231 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2232 if (java_lang_Class::is_primitive(r)) return false;
2233
2234 Klass* k = java_lang_Class::as_Klass(r);
2235 assert(k->oop_is_instance(), "must be an instance klass");
2236 if (! k->oop_is_instance()) return false;
2237
2238 ResourceMark rm(THREAD);
2239 const char* name = k->name()->as_C_string();
2240 bool system_class = k->class_loader() == NULL;
2241 return JavaAssertions::enabled(name, system_class);
2242
2243 JVM_END
2244
2245
2246 // Return a new AssertionStatusDirectives object with the fields filled in with
2247 // command-line assertion arguments (i.e., -ea, -da).
2248 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2249 JVMWrapper("JVM_AssertionStatusDirectives");
2250 JvmtiVMObjectAllocEventCollector oam;
2251 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2252 return JNIHandles::make_local(env, asd);
2253 JVM_END
2254
2255 // Verification ////////////////////////////////////////////////////////////////////////////////
2256
2257 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2258
2259 // RedefineClasses support: bug 6214132 caused verification to fail.
2260 // All functions from this section should call the jvmtiThreadSate function:
2261 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2262 // The function returns a Klass* of the _scratch_class if the verifier
2263 // was invoked in the middle of the class redefinition.
2264 // Otherwise it returns its argument value which is the _the_class Klass*.
2265 // Please, refer to the description in the jvmtiThreadSate.hpp.
2266
2267 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2268 JVMWrapper("JVM_GetClassNameUTF");
2269 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2270 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2271 return k->name()->as_utf8();
2272 JVM_END
2273
2274
2275 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2276 JVMWrapper("JVM_GetClassCPTypes");
2277 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2278 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2279 // types will have length zero if this is not an InstanceKlass
2280 // (length is determined by call to JVM_GetClassCPEntriesCount)
2281 if (k->oop_is_instance()) {
2282 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2283 for (int index = cp->length() - 1; index >= 0; index--) {
2284 constantTag tag = cp->tag_at(index);
2285 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2286 }
2287 }
2288 JVM_END
2289
2290
2291 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2292 JVMWrapper("JVM_GetClassCPEntriesCount");
2293 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2294 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2295 if (!k->oop_is_instance())
2296 return 0;
2297 return InstanceKlass::cast(k)->constants()->length();
2298 JVM_END
2299
2300
2301 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2302 JVMWrapper("JVM_GetClassFieldsCount");
2303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 if (!k->oop_is_instance())
2306 return 0;
2307 return InstanceKlass::cast(k)->java_fields_count();
2308 JVM_END
2309
2310
2311 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2312 JVMWrapper("JVM_GetClassMethodsCount");
2313 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2314 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2315 if (!k->oop_is_instance())
2316 return 0;
2317 return InstanceKlass::cast(k)->methods()->length();
2318 JVM_END
2319
2320
2321 // The following methods, used for the verifier, are never called with
2322 // array klasses, so a direct cast to InstanceKlass is safe.
2323 // Typically, these methods are called in a loop with bounds determined
2324 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2325 // zero for arrays.
2326 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2327 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2330 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2331 int length = method->checked_exceptions_length();
2332 if (length > 0) {
2333 CheckedExceptionElement* table= method->checked_exceptions_start();
2334 for (int i = 0; i < length; i++) {
2335 exceptions[i] = table[i].class_cp_index;
2336 }
2337 }
2338 JVM_END
2339
2340
2341 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2342 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2346 return method->checked_exceptions_length();
2347 JVM_END
2348
2349
2350 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2351 JVMWrapper("JVM_GetMethodIxByteCode");
2352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2353 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2354 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2355 memcpy(code, method->code_base(), method->code_size());
2356 JVM_END
2357
2358
2359 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2360 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2362 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2363 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2364 return method->code_size();
2365 JVM_END
2366
2367
2368 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2369 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2370 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2371 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2373 ExceptionTable extable(method);
2374 entry->start_pc = extable.start_pc(entry_index);
2375 entry->end_pc = extable.end_pc(entry_index);
2376 entry->handler_pc = extable.handler_pc(entry_index);
2377 entry->catchType = extable.catch_type_index(entry_index);
2378 JVM_END
2379
2380
2381 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2382 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2384 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2385 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2386 return method->exception_table_length();
2387 JVM_END
2388
2389
2390 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2391 JVMWrapper("JVM_GetMethodIxModifiers");
2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2395 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2396 JVM_END
2397
2398
2399 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2400 JVMWrapper("JVM_GetFieldIxModifiers");
2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2404 JVM_END
2405
2406
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2408 JVMWrapper("JVM_GetMethodIxLocalsCount");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->max_locals();
2413 JVM_END
2414
2415
2416 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2417 JVMWrapper("JVM_GetMethodIxArgsSize");
2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2421 return method->size_of_parameters();
2422 JVM_END
2423
2424
2425 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2426 JVMWrapper("JVM_GetMethodIxMaxStack");
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430 return method->verifier_max_stack();
2431 JVM_END
2432
2433
2434 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2435 JVMWrapper("JVM_IsConstructorIx");
2436 ResourceMark rm(THREAD);
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2440 return method->name() == vmSymbols::object_initializer_name();
2441 JVM_END
2442
2443
2444 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2445 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2446 ResourceMark rm(THREAD);
2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2450 return method->is_overpass();
2451 JVM_END
2452
2453 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2454 JVMWrapper("JVM_GetMethodIxIxUTF");
2455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2458 return method->name()->as_utf8();
2459 JVM_END
2460
2461
2462 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2463 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2464 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2465 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2466 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2467 return method->signature()->as_utf8();
2468 JVM_END
2469
2470 /**
2471 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2472 * read entries in the constant pool. Since the old verifier always
2473 * works on a copy of the code, it will not see any rewriting that
2474 * may possibly occur in the middle of verification. So it is important
2475 * that nothing it calls tries to use the cpCache instead of the raw
2476 * constant pool, so we must use cp->uncached_x methods when appropriate.
2477 */
2478 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2479 JVMWrapper("JVM_GetCPFieldNameUTF");
2480 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2481 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2482 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2483 switch (cp->tag_at(cp_index).value()) {
2484 case JVM_CONSTANT_Fieldref:
2485 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2486 default:
2487 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2488 }
2489 ShouldNotReachHere();
2490 return NULL;
2491 JVM_END
2492
2493
2494 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2495 JVMWrapper("JVM_GetCPMethodNameUTF");
2496 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2497 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2498 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2499 switch (cp->tag_at(cp_index).value()) {
2500 case JVM_CONSTANT_InterfaceMethodref:
2501 case JVM_CONSTANT_Methodref:
2502 case JVM_CONSTANT_NameAndType: // for invokedynamic
2503 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2504 default:
2505 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2506 }
2507 ShouldNotReachHere();
2508 return NULL;
2509 JVM_END
2510
2511
2512 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2513 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2517 switch (cp->tag_at(cp_index).value()) {
2518 case JVM_CONSTANT_InterfaceMethodref:
2519 case JVM_CONSTANT_Methodref:
2520 case JVM_CONSTANT_NameAndType: // for invokedynamic
2521 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2522 default:
2523 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2524 }
2525 ShouldNotReachHere();
2526 return NULL;
2527 JVM_END
2528
2529
2530 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2531 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2535 switch (cp->tag_at(cp_index).value()) {
2536 case JVM_CONSTANT_Fieldref:
2537 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2538 default:
2539 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2540 }
2541 ShouldNotReachHere();
2542 return NULL;
2543 JVM_END
2544
2545
2546 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2547 JVMWrapper("JVM_GetCPClassNameUTF");
2548 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2549 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2550 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2551 Symbol* classname = cp->klass_name_at(cp_index);
2552 return classname->as_utf8();
2553 JVM_END
2554
2555
2556 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2557 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2561 switch (cp->tag_at(cp_index).value()) {
2562 case JVM_CONSTANT_Fieldref: {
2563 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2564 Symbol* classname = cp->klass_name_at(class_index);
2565 return classname->as_utf8();
2566 }
2567 default:
2568 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2569 }
2570 ShouldNotReachHere();
2571 return NULL;
2572 JVM_END
2573
2574
2575 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2576 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2579 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2580 switch (cp->tag_at(cp_index).value()) {
2581 case JVM_CONSTANT_Methodref:
2582 case JVM_CONSTANT_InterfaceMethodref: {
2583 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2584 Symbol* classname = cp->klass_name_at(class_index);
2585 return classname->as_utf8();
2586 }
2587 default:
2588 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2589 }
2590 ShouldNotReachHere();
2591 return NULL;
2592 JVM_END
2593
2594
2595 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2596 JVMWrapper("JVM_GetCPFieldModifiers");
2597 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2598 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2599 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2600 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2601 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2602 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2603 switch (cp->tag_at(cp_index).value()) {
2604 case JVM_CONSTANT_Fieldref: {
2605 Symbol* name = cp->uncached_name_ref_at(cp_index);
2606 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2607 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2608 if (fs.name() == name && fs.signature() == signature) {
2609 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2610 }
2611 }
2612 return -1;
2613 }
2614 default:
2615 fatal("JVM_GetCPFieldModifiers: illegal constant");
2616 }
2617 ShouldNotReachHere();
2618 return 0;
2619 JVM_END
2620
2621
2622 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2623 JVMWrapper("JVM_GetCPMethodModifiers");
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2625 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2626 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2627 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2628 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2629 switch (cp->tag_at(cp_index).value()) {
2630 case JVM_CONSTANT_Methodref:
2631 case JVM_CONSTANT_InterfaceMethodref: {
2632 Symbol* name = cp->uncached_name_ref_at(cp_index);
2633 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2634 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2635 int methods_count = methods->length();
2636 for (int i = 0; i < methods_count; i++) {
2637 Method* method = methods->at(i);
2638 if (method->name() == name && method->signature() == signature) {
2639 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2640 }
2641 }
2642 return -1;
2643 }
2644 default:
2645 fatal("JVM_GetCPMethodModifiers: illegal constant");
2646 }
2647 ShouldNotReachHere();
2648 return 0;
2649 JVM_END
2650
2651
2652 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2653
2654 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2655 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2656 JVM_END
2657
2658
2659 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2660 JVMWrapper("JVM_IsSameClassPackage");
2661 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2662 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2663 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2664 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2665 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2666 JVM_END
2667
2668
2669 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2670
2671 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2672 JVMWrapper2("JVM_Open (%s)", fname);
2673
2674 //%note jvm_r6
2675 int result = os::open(fname, flags, mode);
2676 if (result >= 0) {
2677 return result;
2678 } else {
2679 switch(errno) {
2680 case EEXIST:
2681 return JVM_EEXIST;
2682 default:
2683 return -1;
2684 }
2685 }
2686 JVM_END
2687
2688
2689 JVM_LEAF(jint, JVM_Close(jint fd))
2690 JVMWrapper2("JVM_Close (0x%x)", fd);
2691 //%note jvm_r6
2692 return os::close(fd);
2693 JVM_END
2694
2695
2696 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2697 JVMWrapper2("JVM_Read (0x%x)", fd);
2698
2699 //%note jvm_r6
2700 return (jint)os::restartable_read(fd, buf, nbytes);
2701 JVM_END
2702
2703
2704 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2705 JVMWrapper2("JVM_Write (0x%x)", fd);
2706
2707 //%note jvm_r6
2708 return (jint)os::write(fd, buf, nbytes);
2709 JVM_END
2710
2711
2712 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2713 JVMWrapper2("JVM_Available (0x%x)", fd);
2714 //%note jvm_r6
2715 return os::available(fd, pbytes);
2716 JVM_END
2717
2718
2719 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2720 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2721 //%note jvm_r6
2722 return os::lseek(fd, offset, whence);
2723 JVM_END
2724
2725
2726 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2727 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2728 return os::ftruncate(fd, length);
2729 JVM_END
2730
2731
2732 JVM_LEAF(jint, JVM_Sync(jint fd))
2733 JVMWrapper2("JVM_Sync (0x%x)", fd);
2734 //%note jvm_r6
2735 return os::fsync(fd);
2736 JVM_END
2737
2738
2739 // Printing support //////////////////////////////////////////////////
2740 extern "C" {
2741
2742 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2743 // see bug 4399518, 4417214
2744 if ((intptr_t)count <= 0) return -1;
2745 return vsnprintf(str, count, fmt, args);
2746 }
2747
2748
2749 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2750 va_list args;
2751 int len;
2752 va_start(args, fmt);
2753 len = jio_vsnprintf(str, count, fmt, args);
2754 va_end(args);
2755 return len;
2756 }
2757
2758
2759 int jio_fprintf(FILE* f, const char *fmt, ...) {
2760 int len;
2761 va_list args;
2762 va_start(args, fmt);
2763 len = jio_vfprintf(f, fmt, args);
2764 va_end(args);
2765 return len;
2766 }
2767
2768
2769 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2770 if (Arguments::vfprintf_hook() != NULL) {
2771 return Arguments::vfprintf_hook()(f, fmt, args);
2772 } else {
2773 return vfprintf(f, fmt, args);
2774 }
2775 }
2776
2777
2778 JNIEXPORT int jio_printf(const char *fmt, ...) {
2779 int len;
2780 va_list args;
2781 va_start(args, fmt);
2782 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2783 va_end(args);
2784 return len;
2785 }
2786
2787
2788 // HotSpot specific jio method
2789 void jio_print(const char* s) {
2790 // Try to make this function as atomic as possible.
2791 if (Arguments::vfprintf_hook() != NULL) {
2792 jio_fprintf(defaultStream::output_stream(), "%s", s);
2793 } else {
2794 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2795 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2796 }
2797 }
2798
2799 } // Extern C
2800
2801 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2802
2803 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2804 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2805 // OSThread objects. The exception to this rule is when the target object is the thread
2806 // doing the operation, in which case we know that the thread won't exit until the
2807 // operation is done (all exits being voluntary). There are a few cases where it is
2808 // rather silly to do operations on yourself, like resuming yourself or asking whether
2809 // you are alive. While these can still happen, they are not subject to deadlocks if
2810 // the lock is held while the operation occurs (this is not the case for suspend, for
2811 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2812 // implementation is local to this file, we always lock Threads_lock for that one.
2813
2814 static void thread_entry(JavaThread* thread, TRAPS) {
2815 HandleMark hm(THREAD);
2816 Handle obj(THREAD, thread->threadObj());
2817 JavaValue result(T_VOID);
2818 JavaCalls::call_virtual(&result,
2819 obj,
2820 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2821 vmSymbols::run_method_name(),
2822 vmSymbols::void_method_signature(),
2823 THREAD);
2824 }
2825
2826
2827 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2828 JVMWrapper("JVM_StartThread");
2829 JavaThread *native_thread = NULL;
2830
2831 // We cannot hold the Threads_lock when we throw an exception,
2832 // due to rank ordering issues. Example: we might need to grab the
2833 // Heap_lock while we construct the exception.
2834 bool throw_illegal_thread_state = false;
2835
2836 // We must release the Threads_lock before we can post a jvmti event
2837 // in Thread::start.
2838 {
2839 // Ensure that the C++ Thread and OSThread structures aren't freed before
2840 // we operate.
2841 MutexLocker mu(Threads_lock);
2842
2843 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2844 // re-starting an already started thread, so we should usually find
2845 // that the JavaThread is null. However for a JNI attached thread
2846 // there is a small window between the Thread object being created
2847 // (with its JavaThread set) and the update to its threadStatus, so we
2848 // have to check for this
2849 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2850 throw_illegal_thread_state = true;
2851 } else {
2852 // We could also check the stillborn flag to see if this thread was already stopped, but
2853 // for historical reasons we let the thread detect that itself when it starts running
2854
2855 jlong size =
2856 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2857 // Allocate the C++ Thread structure and create the native thread. The
2858 // stack size retrieved from java is signed, but the constructor takes
2859 // size_t (an unsigned type), so avoid passing negative values which would
2860 // result in really large stacks.
2861 size_t sz = size > 0 ? (size_t) size : 0;
2862 native_thread = new JavaThread(&thread_entry, sz);
2863
2864 // At this point it may be possible that no osthread was created for the
2865 // JavaThread due to lack of memory. Check for this situation and throw
2866 // an exception if necessary. Eventually we may want to change this so
2867 // that we only grab the lock if the thread was created successfully -
2868 // then we can also do this check and throw the exception in the
2869 // JavaThread constructor.
2870 if (native_thread->osthread() != NULL) {
2871 // Note: the current thread is not being used within "prepare".
2872 native_thread->prepare(jthread);
2873 }
2874 }
2875 }
2876
2877 if (throw_illegal_thread_state) {
2878 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2879 }
2880
2881 assert(native_thread != NULL, "Starting null thread?");
2882
2883 if (native_thread->osthread() == NULL) {
2884 // No one should hold a reference to the 'native_thread'.
2885 delete native_thread;
2886 if (JvmtiExport::should_post_resource_exhausted()) {
2887 JvmtiExport::post_resource_exhausted(
2888 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2889 os::native_thread_creation_failed_msg());
2890 }
2891 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2892 os::native_thread_creation_failed_msg());
2893 }
2894
2895 Thread::start(native_thread);
2896
2897 JVM_END
2898
2899 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2900 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2901 // but is thought to be reliable and simple. In the case, where the receiver is the
2902 // same thread as the sender, no safepoint is needed.
2903 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2904 JVMWrapper("JVM_StopThread");
2905
2906 oop java_throwable = JNIHandles::resolve(throwable);
2907 if (java_throwable == NULL) {
2908 THROW(vmSymbols::java_lang_NullPointerException());
2909 }
2910 oop java_thread = JNIHandles::resolve_non_null(jthread);
2911 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2912 Events::log_exception(JavaThread::current(),
2913 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2914 receiver, (address)java_thread, throwable);
2915 // First check if thread is alive
2916 if (receiver != NULL) {
2917 // Check if exception is getting thrown at self (use oop equality, since the
2918 // target object might exit)
2919 if (java_thread == thread->threadObj()) {
2920 THROW_OOP(java_throwable);
2921 } else {
2922 // Enques a VM_Operation to stop all threads and then deliver the exception...
2923 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2924 }
2925 }
2926 else {
2927 // Either:
2928 // - target thread has not been started before being stopped, or
2929 // - target thread already terminated
2930 // We could read the threadStatus to determine which case it is
2931 // but that is overkill as it doesn't matter. We must set the
2932 // stillborn flag for the first case, and if the thread has already
2933 // exited setting this flag has no affect
2934 java_lang_Thread::set_stillborn(java_thread);
2935 }
2936 JVM_END
2937
2938
2939 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2940 JVMWrapper("JVM_IsThreadAlive");
2941
2942 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2943 return java_lang_Thread::is_alive(thread_oop);
2944 JVM_END
2945
2946
2947 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2948 JVMWrapper("JVM_SuspendThread");
2949 oop java_thread = JNIHandles::resolve_non_null(jthread);
2950 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2951
2952 if (receiver != NULL) {
2953 // thread has run and has not exited (still on threads list)
2954
2955 {
2956 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2957 if (receiver->is_external_suspend()) {
2958 // Don't allow nested external suspend requests. We can't return
2959 // an error from this interface so just ignore the problem.
2960 return;
2961 }
2962 if (receiver->is_exiting()) { // thread is in the process of exiting
2963 return;
2964 }
2965 receiver->set_external_suspend();
2966 }
2967
2968 // java_suspend() will catch threads in the process of exiting
2969 // and will ignore them.
2970 receiver->java_suspend();
2971
2972 // It would be nice to have the following assertion in all the
2973 // time, but it is possible for a racing resume request to have
2974 // resumed this thread right after we suspended it. Temporarily
2975 // enable this assertion if you are chasing a different kind of
2976 // bug.
2977 //
2978 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2979 // receiver->is_being_ext_suspended(), "thread is not suspended");
2980 }
2981 JVM_END
2982
2983
2984 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2985 JVMWrapper("JVM_ResumeThread");
2986 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2987 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2988 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2989 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2990 // looks at it.
2991 MutexLocker ml(Threads_lock);
2992 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2993 if (thr != NULL) {
2994 // the thread has run and is not in the process of exiting
2995 thr->java_resume();
2996 }
2997 JVM_END
2998
2999
3000 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3001 JVMWrapper("JVM_SetThreadPriority");
3002 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3003 MutexLocker ml(Threads_lock);
3004 oop java_thread = JNIHandles::resolve_non_null(jthread);
3005 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3006 JavaThread* thr = java_lang_Thread::thread(java_thread);
3007 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3008 Thread::set_priority(thr, (ThreadPriority)prio);
3009 }
3010 JVM_END
3011
3012
3013 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3014 JVMWrapper("JVM_Yield");
3015 if (os::dont_yield()) return;
3016 HOTSPOT_THREAD_YIELD();
3017
3018 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3019 // Critical for similar threading behaviour
3020 if (ConvertYieldToSleep) {
3021 os::sleep(thread, MinSleepInterval, false);
3022 } else {
3023 os::yield();
3024 }
3025 JVM_END
3026
3027
3028 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3029 JVMWrapper("JVM_Sleep");
3030
3031 if (millis < 0) {
3032 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3033 }
3034
3035 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3036 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3037 }
3038
3039 // Save current thread state and restore it at the end of this block.
3040 // And set new thread state to SLEEPING.
3041 JavaThreadSleepState jtss(thread);
3042
3043 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3044
3045 EventThreadSleep event;
3046
3047 if (millis == 0) {
3048 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3049 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3050 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3051 // for SOLARIS
3052 if (ConvertSleepToYield) {
3053 os::yield();
3054 } else {
3055 ThreadState old_state = thread->osthread()->get_state();
3056 thread->osthread()->set_state(SLEEPING);
3057 os::sleep(thread, MinSleepInterval, false);
3058 thread->osthread()->set_state(old_state);
3059 }
3060 } else {
3061 ThreadState old_state = thread->osthread()->get_state();
3062 thread->osthread()->set_state(SLEEPING);
3063 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3064 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3065 // us while we were sleeping. We do not overwrite those.
3066 if (!HAS_PENDING_EXCEPTION) {
3067 if (event.should_commit()) {
3068 event.set_time(millis);
3069 event.commit();
3070 }
3071 HOTSPOT_THREAD_SLEEP_END(1);
3072
3073 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3074 // to properly restore the thread state. That's likely wrong.
3075 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3076 }
3077 }
3078 thread->osthread()->set_state(old_state);
3079 }
3080 if (event.should_commit()) {
3081 event.set_time(millis);
3082 event.commit();
3083 }
3084 HOTSPOT_THREAD_SLEEP_END(0);
3085 JVM_END
3086
3087 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3088 JVMWrapper("JVM_CurrentThread");
3089 oop jthread = thread->threadObj();
3090 assert (thread != NULL, "no current thread!");
3091 return JNIHandles::make_local(env, jthread);
3092 JVM_END
3093
3094
3095 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3096 JVMWrapper("JVM_CountStackFrames");
3097
3098 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3099 oop java_thread = JNIHandles::resolve_non_null(jthread);
3100 bool throw_illegal_thread_state = false;
3101 int count = 0;
3102
3103 {
3104 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3105 // We need to re-resolve the java_thread, since a GC might have happened during the
3106 // acquire of the lock
3107 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3108
3109 if (thr == NULL) {
3110 // do nothing
3111 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3112 // Check whether this java thread has been suspended already. If not, throws
3113 // IllegalThreadStateException. We defer to throw that exception until
3114 // Threads_lock is released since loading exception class has to leave VM.
3115 // The correct way to test a thread is actually suspended is
3116 // wait_for_ext_suspend_completion(), but we can't call that while holding
3117 // the Threads_lock. The above tests are sufficient for our purposes
3118 // provided the walkability of the stack is stable - which it isn't
3119 // 100% but close enough for most practical purposes.
3120 throw_illegal_thread_state = true;
3121 } else {
3122 // Count all java activation, i.e., number of vframes
3123 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3124 // Native frames are not counted
3125 if (!vfst.method()->is_native()) count++;
3126 }
3127 }
3128 }
3129
3130 if (throw_illegal_thread_state) {
3131 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3132 "this thread is not suspended");
3133 }
3134 return count;
3135 JVM_END
3136
3137 // Consider: A better way to implement JVM_Interrupt() is to acquire
3138 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3139 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3140 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3141 // outside the critical section. Threads_lock is hot so we want to minimize
3142 // the hold-time. A cleaner interface would be to decompose interrupt into
3143 // two steps. The 1st phase, performed under Threads_lock, would return
3144 // a closure that'd be invoked after Threads_lock was dropped.
3145 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3146 // admit spurious wakeups.
3147
3148 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3149 JVMWrapper("JVM_Interrupt");
3150
3151 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3152 oop java_thread = JNIHandles::resolve_non_null(jthread);
3153 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3154 // We need to re-resolve the java_thread, since a GC might have happened during the
3155 // acquire of the lock
3156 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3157 if (thr != NULL) {
3158 Thread::interrupt(thr);
3159 }
3160 JVM_END
3161
3162
3163 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3164 JVMWrapper("JVM_IsInterrupted");
3165
3166 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3167 oop java_thread = JNIHandles::resolve_non_null(jthread);
3168 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3169 // We need to re-resolve the java_thread, since a GC might have happened during the
3170 // acquire of the lock
3171 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3172 if (thr == NULL) {
3173 return JNI_FALSE;
3174 } else {
3175 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3176 }
3177 JVM_END
3178
3179
3180 // Return true iff the current thread has locked the object passed in
3181
3182 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3183 JVMWrapper("JVM_HoldsLock");
3184 assert(THREAD->is_Java_thread(), "sanity check");
3185 if (obj == NULL) {
3186 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3187 }
3188 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3189 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3190 JVM_END
3191
3192
3193 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3194 JVMWrapper("JVM_DumpAllStacks");
3195 VM_PrintThreads op;
3196 VMThread::execute(&op);
3197 if (JvmtiExport::should_post_data_dump()) {
3198 JvmtiExport::post_data_dump();
3199 }
3200 JVM_END
3201
3202 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3203 JVMWrapper("JVM_SetNativeThreadName");
3204 ResourceMark rm(THREAD);
3205 oop java_thread = JNIHandles::resolve_non_null(jthread);
3206 JavaThread* thr = java_lang_Thread::thread(java_thread);
3207 // Thread naming only supported for the current thread, doesn't work for
3208 // target threads.
3209 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3210 // we don't set the name of an attached thread to avoid stepping
3211 // on other programs
3212 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3213 os::set_native_thread_name(thread_name);
3214 }
3215 JVM_END
3216
3217 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3218
3219 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3220 assert(jthread->is_Java_thread(), "must be a Java thread");
3221 if (jthread->privileged_stack_top() == NULL) return false;
3222 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3223 oop loader = jthread->privileged_stack_top()->class_loader();
3224 if (loader == NULL) return true;
3225 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3226 if (trusted) return true;
3227 }
3228 return false;
3229 }
3230
3231 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3232 JVMWrapper("JVM_CurrentLoadedClass");
3233 ResourceMark rm(THREAD);
3234
3235 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3236 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3237 bool trusted = is_trusted_frame(thread, &vfst);
3238 if (trusted) return NULL;
3239
3240 Method* m = vfst.method();
3241 if (!m->is_native()) {
3242 InstanceKlass* holder = m->method_holder();
3243 oop loader = holder->class_loader();
3244 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3245 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3246 }
3247 }
3248 }
3249 return NULL;
3250 JVM_END
3251
3252
3253 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3254 JVMWrapper("JVM_CurrentClassLoader");
3255 ResourceMark rm(THREAD);
3256
3257 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3258
3259 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3260 bool trusted = is_trusted_frame(thread, &vfst);
3261 if (trusted) return NULL;
3262
3263 Method* m = vfst.method();
3264 if (!m->is_native()) {
3265 InstanceKlass* holder = m->method_holder();
3266 assert(holder->is_klass(), "just checking");
3267 oop loader = holder->class_loader();
3268 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3269 return JNIHandles::make_local(env, loader);
3270 }
3271 }
3272 }
3273 return NULL;
3274 JVM_END
3275
3276
3277 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3278 JVMWrapper("JVM_GetClassContext");
3279 ResourceMark rm(THREAD);
3280 JvmtiVMObjectAllocEventCollector oam;
3281 vframeStream vfst(thread);
3282
3283 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3284 // This must only be called from SecurityManager.getClassContext
3285 Method* m = vfst.method();
3286 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3287 m->name() == vmSymbols::getClassContext_name() &&
3288 m->signature() == vmSymbols::void_class_array_signature())) {
3289 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3290 }
3291 }
3292
3293 // Collect method holders
3294 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3295 for (; !vfst.at_end(); vfst.security_next()) {
3296 Method* m = vfst.method();
3297 // Native frames are not returned
3298 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3299 Klass* holder = m->method_holder();
3300 assert(holder->is_klass(), "just checking");
3301 klass_array->append(holder);
3302 }
3303 }
3304
3305 // Create result array of type [Ljava/lang/Class;
3306 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3307 // Fill in mirrors corresponding to method holders
3308 for (int i = 0; i < klass_array->length(); i++) {
3309 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3310 }
3311
3312 return (jobjectArray) JNIHandles::make_local(env, result);
3313 JVM_END
3314
3315
3316 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3317 JVMWrapper("JVM_ClassDepth");
3318 ResourceMark rm(THREAD);
3319 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3320 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3321
3322 const char* str = java_lang_String::as_utf8_string(class_name_str());
3323 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3324 if (class_name_sym == NULL) {
3325 return -1;
3326 }
3327
3328 int depth = 0;
3329
3330 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3331 if (!vfst.method()->is_native()) {
3332 InstanceKlass* holder = vfst.method()->method_holder();
3333 assert(holder->is_klass(), "just checking");
3334 if (holder->name() == class_name_sym) {
3335 return depth;
3336 }
3337 depth++;
3338 }
3339 }
3340 return -1;
3341 JVM_END
3342
3343
3344 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3345 JVMWrapper("JVM_ClassLoaderDepth");
3346 ResourceMark rm(THREAD);
3347 int depth = 0;
3348 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3349 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3350 bool trusted = is_trusted_frame(thread, &vfst);
3351 if (trusted) return -1;
3352
3353 Method* m = vfst.method();
3354 if (!m->is_native()) {
3355 InstanceKlass* holder = m->method_holder();
3356 assert(holder->is_klass(), "just checking");
3357 oop loader = holder->class_loader();
3358 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3359 return depth;
3360 }
3361 depth++;
3362 }
3363 }
3364 return -1;
3365 JVM_END
3366
3367
3368 // java.lang.Package ////////////////////////////////////////////////////////////////
3369
3370
3371 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3372 JVMWrapper("JVM_GetSystemPackage");
3373 ResourceMark rm(THREAD);
3374 JvmtiVMObjectAllocEventCollector oam;
3375 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3376 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3377 return (jstring) JNIHandles::make_local(result);
3378 JVM_END
3379
3380
3381 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3382 JVMWrapper("JVM_GetSystemPackages");
3383 JvmtiVMObjectAllocEventCollector oam;
3384 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3385 return (jobjectArray) JNIHandles::make_local(result);
3386 JVM_END
3387
3388
3389 // ObjectInputStream ///////////////////////////////////////////////////////////////
3390
3391 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3392 if (current_class == NULL) {
3393 return true;
3394 }
3395 if ((current_class == field_class) || access.is_public()) {
3396 return true;
3397 }
3398
3399 if (access.is_protected()) {
3400 // See if current_class is a subclass of field_class
3401 if (current_class->is_subclass_of(field_class)) {
3402 return true;
3403 }
3404 }
3405
3406 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3407 }
3408
3409
3410 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3411 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3412 JVMWrapper("JVM_AllocateNewObject");
3413 JvmtiVMObjectAllocEventCollector oam;
3414 // Receiver is not used
3415 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3416 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3417
3418 // Cannot instantiate primitive types
3419 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3420 ResourceMark rm(THREAD);
3421 THROW_0(vmSymbols::java_lang_InvalidClassException());
3422 }
3423
3424 // Arrays not allowed here, must use JVM_AllocateNewArray
3425 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3426 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3427 ResourceMark rm(THREAD);
3428 THROW_0(vmSymbols::java_lang_InvalidClassException());
3429 }
3430
3431 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3432 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3433
3434 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3435
3436 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3437 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3438
3439 // Make sure klass is initialized, since we are about to instantiate one of them.
3440 curr_klass->initialize(CHECK_NULL);
3441
3442 methodHandle m (THREAD,
3443 init_klass->find_method(vmSymbols::object_initializer_name(),
3444 vmSymbols::void_method_signature()));
3445 if (m.is_null()) {
3446 ResourceMark rm(THREAD);
3447 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3448 Method::name_and_sig_as_C_string(init_klass(),
3449 vmSymbols::object_initializer_name(),
3450 vmSymbols::void_method_signature()));
3451 }
3452
3453 if (curr_klass == init_klass && !m->is_public()) {
3454 // Calling the constructor for class 'curr_klass'.
3455 // Only allow calls to a public no-arg constructor.
3456 // This path corresponds to creating an Externalizable object.
3457 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3458 }
3459
3460 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3461 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3462 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3463 }
3464
3465 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3466 // Call constructor m. This might call a constructor higher up in the hierachy
3467 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3468
3469 return JNIHandles::make_local(obj());
3470 JVM_END
3471
3472
3473 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3474 JVMWrapper("JVM_AllocateNewArray");
3475 JvmtiVMObjectAllocEventCollector oam;
3476 oop mirror = JNIHandles::resolve_non_null(currClass);
3477
3478 if (java_lang_Class::is_primitive(mirror)) {
3479 THROW_0(vmSymbols::java_lang_InvalidClassException());
3480 }
3481 Klass* k = java_lang_Class::as_Klass(mirror);
3482 oop result;
3483
3484 if (k->oop_is_typeArray()) {
3485 // typeArray
3486 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3487 } else if (k->oop_is_objArray()) {
3488 // objArray
3489 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3490 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3491 result = oak->allocate(length, CHECK_NULL);
3492 } else {
3493 THROW_0(vmSymbols::java_lang_InvalidClassException());
3494 }
3495 return JNIHandles::make_local(env, result);
3496 JVM_END
3497
3498
3499 // Return the first non-null class loader up the execution stack, or null
3500 // if only code from the null class loader is on the stack.
3501
3502 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3503 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3504 // UseNewReflection
3505 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3506 oop loader = vfst.method()->method_holder()->class_loader();
3507 if (loader != NULL) {
3508 return JNIHandles::make_local(env, loader);
3509 }
3510 }
3511 return NULL;
3512 JVM_END
3513
3514
3515 // Load a class relative to the most recent class on the stack with a non-null
3516 // classloader.
3517 // This function has been deprecated and should not be considered part of the
3518 // specified JVM interface.
3519
3520 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3521 jclass currClass, jstring currClassName))
3522 JVMWrapper("JVM_LoadClass0");
3523 // Receiver is not used
3524 ResourceMark rm(THREAD);
3525
3526 // Class name argument is not guaranteed to be in internal format
3527 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3528 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3529
3530 const char* str = java_lang_String::as_utf8_string(string());
3531
3532 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3533 // It's impossible to create this class; the name cannot fit
3534 // into the constant pool.
3535 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3536 }
3537
3538 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3539 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3540 // Find the most recent class on the stack with a non-null classloader
3541 oop loader = NULL;
3542 oop protection_domain = NULL;
3543 if (curr_klass.is_null()) {
3544 for (vframeStream vfst(thread);
3545 !vfst.at_end() && loader == NULL;
3546 vfst.next()) {
3547 if (!vfst.method()->is_native()) {
3548 InstanceKlass* holder = vfst.method()->method_holder();
3549 loader = holder->class_loader();
3550 protection_domain = holder->protection_domain();
3551 }
3552 }
3553 } else {
3554 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3555 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3556 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3557 }
3558 Handle h_loader(THREAD, loader);
3559 Handle h_prot (THREAD, protection_domain);
3560 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3561 false, thread);
3562 if (TraceClassResolution && result != NULL) {
3563 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3564 }
3565 return result;
3566 JVM_END
3567
3568
3569 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3570
3571
3572 // resolve array handle and check arguments
3573 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3574 if (arr == NULL) {
3575 THROW_0(vmSymbols::java_lang_NullPointerException());
3576 }
3577 oop a = JNIHandles::resolve_non_null(arr);
3578 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3579 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3580 }
3581 return arrayOop(a);
3582 }
3583
3584
3585 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3586 JVMWrapper("JVM_GetArrayLength");
3587 arrayOop a = check_array(env, arr, false, CHECK_0);
3588 return a->length();
3589 JVM_END
3590
3591
3592 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3593 JVMWrapper("JVM_Array_Get");
3594 JvmtiVMObjectAllocEventCollector oam;
3595 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3596 jvalue value;
3597 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3598 oop box = Reflection::box(&value, type, CHECK_NULL);
3599 return JNIHandles::make_local(env, box);
3600 JVM_END
3601
3602
3603 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3604 JVMWrapper("JVM_GetPrimitiveArrayElement");
3605 jvalue value;
3606 value.i = 0; // to initialize value before getting used in CHECK
3607 arrayOop a = check_array(env, arr, true, CHECK_(value));
3608 assert(a->is_typeArray(), "just checking");
3609 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3610 BasicType wide_type = (BasicType) wCode;
3611 if (type != wide_type) {
3612 Reflection::widen(&value, type, wide_type, CHECK_(value));
3613 }
3614 return value;
3615 JVM_END
3616
3617
3618 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3619 JVMWrapper("JVM_SetArrayElement");
3620 arrayOop a = check_array(env, arr, false, CHECK);
3621 oop box = JNIHandles::resolve(val);
3622 jvalue value;
3623 value.i = 0; // to initialize value before getting used in CHECK
3624 BasicType value_type;
3625 if (a->is_objArray()) {
3626 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3627 value_type = Reflection::unbox_for_regular_object(box, &value);
3628 } else {
3629 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3630 }
3631 Reflection::array_set(&value, a, index, value_type, CHECK);
3632 JVM_END
3633
3634
3635 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3636 JVMWrapper("JVM_SetPrimitiveArrayElement");
3637 arrayOop a = check_array(env, arr, true, CHECK);
3638 assert(a->is_typeArray(), "just checking");
3639 BasicType value_type = (BasicType) vCode;
3640 Reflection::array_set(&v, a, index, value_type, CHECK);
3641 JVM_END
3642
3643
3644 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3645 JVMWrapper("JVM_NewArray");
3646 JvmtiVMObjectAllocEventCollector oam;
3647 oop element_mirror = JNIHandles::resolve(eltClass);
3648 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3649 return JNIHandles::make_local(env, result);
3650 JVM_END
3651
3652
3653 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3654 JVMWrapper("JVM_NewMultiArray");
3655 JvmtiVMObjectAllocEventCollector oam;
3656 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3657 oop element_mirror = JNIHandles::resolve(eltClass);
3658 assert(dim_array->is_typeArray(), "just checking");
3659 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3660 return JNIHandles::make_local(env, result);
3661 JVM_END
3662
3663
3664 // Networking library support ////////////////////////////////////////////////////////////////////
3665
3666 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3667 JVMWrapper("JVM_InitializeSocketLibrary");
3668 return 0;
3669 JVM_END
3670
3671
3672 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3673 JVMWrapper("JVM_Socket");
3674 return os::socket(domain, type, protocol);
3675 JVM_END
3676
3677
3678 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3679 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3680 //%note jvm_r6
3681 return os::socket_close(fd);
3682 JVM_END
3683
3684
3685 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3686 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3687 //%note jvm_r6
3688 return os::socket_shutdown(fd, howto);
3689 JVM_END
3690
3691
3692 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3693 JVMWrapper2("JVM_Recv (0x%x)", fd);
3694 //%note jvm_r6
3695 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3696 JVM_END
3697
3698
3699 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3700 JVMWrapper2("JVM_Send (0x%x)", fd);
3701 //%note jvm_r6
3702 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3703 JVM_END
3704
3705
3706 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3707 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3708 //%note jvm_r6
3709 return os::timeout(fd, timeout);
3710 JVM_END
3711
3712
3713 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3714 JVMWrapper2("JVM_Listen (0x%x)", fd);
3715 //%note jvm_r6
3716 return os::listen(fd, count);
3717 JVM_END
3718
3719
3720 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3721 JVMWrapper2("JVM_Connect (0x%x)", fd);
3722 //%note jvm_r6
3723 return os::connect(fd, him, (socklen_t)len);
3724 JVM_END
3725
3726
3727 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3728 JVMWrapper2("JVM_Bind (0x%x)", fd);
3729 //%note jvm_r6
3730 return os::bind(fd, him, (socklen_t)len);
3731 JVM_END
3732
3733
3734 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3735 JVMWrapper2("JVM_Accept (0x%x)", fd);
3736 //%note jvm_r6
3737 socklen_t socklen = (socklen_t)(*len);
3738 jint result = os::accept(fd, him, &socklen);
3739 *len = (jint)socklen;
3740 return result;
3741 JVM_END
3742
3743
3744 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3745 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3746 //%note jvm_r6
3747 socklen_t socklen = (socklen_t)(*fromlen);
3748 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3749 *fromlen = (int)socklen;
3750 return result;
3751 JVM_END
3752
3753
3754 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3755 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3756 //%note jvm_r6
3757 socklen_t socklen = (socklen_t)(*len);
3758 jint result = os::get_sock_name(fd, him, &socklen);
3759 *len = (int)socklen;
3760 return result;
3761 JVM_END
3762
3763
3764 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3765 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3766 //%note jvm_r6
3767 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3768 JVM_END
3769
3770
3771 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3772 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3773 //%note jvm_r6
3774 return os::socket_available(fd, pbytes);
3775 JVM_END
3776
3777
3778 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3779 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3780 //%note jvm_r6
3781 socklen_t socklen = (socklen_t)(*optlen);
3782 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3783 *optlen = (int)socklen;
3784 return result;
3785 JVM_END
3786
3787
3788 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3789 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3790 //%note jvm_r6
3791 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3792 JVM_END
3793
3794
3795 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3796 JVMWrapper("JVM_GetHostName");
3797 return os::get_host_name(name, namelen);
3798 JVM_END
3799
3800
3801 // Library support ///////////////////////////////////////////////////////////////////////////
3802
3803 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3804 //%note jvm_ct
3805 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3806 char ebuf[1024];
3807 void *load_result;
3808 {
3809 ThreadToNativeFromVM ttnfvm(thread);
3810 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3811 }
3812 if (load_result == NULL) {
3813 char msg[1024];
3814 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3815 // Since 'ebuf' may contain a string encoded using
3816 // platform encoding scheme, we need to pass
3817 // Exceptions::unsafe_to_utf8 to the new_exception method
3818 // as the last argument. See bug 6367357.
3819 Handle h_exception =
3820 Exceptions::new_exception(thread,
3821 vmSymbols::java_lang_UnsatisfiedLinkError(),
3822 msg, Exceptions::unsafe_to_utf8);
3823
3824 THROW_HANDLE_0(h_exception);
3825 }
3826 return load_result;
3827 JVM_END
3828
3829
3830 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3831 JVMWrapper("JVM_UnloadLibrary");
3832 os::dll_unload(handle);
3833 JVM_END
3834
3835
3836 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3837 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3838 return os::dll_lookup(handle, name);
3839 JVM_END
3840
3841
3842 // Floating point support ////////////////////////////////////////////////////////////////////
3843
3844 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3845 JVMWrapper("JVM_IsNaN");
3846 return g_isnan(a);
3847 JVM_END
3848
3849
3850 // JNI version ///////////////////////////////////////////////////////////////////////////////
3851
3852 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3853 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3854 return Threads::is_supported_jni_version_including_1_1(version);
3855 JVM_END
3856
3857
3858 // String support ///////////////////////////////////////////////////////////////////////////
3859
3860 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3861 JVMWrapper("JVM_InternString");
3862 JvmtiVMObjectAllocEventCollector oam;
3863 if (str == NULL) return NULL;
3864 oop string = JNIHandles::resolve_non_null(str);
3865 oop result = StringTable::intern(string, CHECK_NULL);
3866 return (jstring) JNIHandles::make_local(env, result);
3867 JVM_END
3868
3869
3870 // Raw monitor support //////////////////////////////////////////////////////////////////////
3871
3872 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3873 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3874 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3875 // that only works with java threads.
3876
3877
3878 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3879 VM_Exit::block_if_vm_exited();
3880 JVMWrapper("JVM_RawMonitorCreate");
3881 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3882 }
3883
3884
3885 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3886 VM_Exit::block_if_vm_exited();
3887 JVMWrapper("JVM_RawMonitorDestroy");
3888 delete ((Mutex*) mon);
3889 }
3890
3891
3892 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3893 VM_Exit::block_if_vm_exited();
3894 JVMWrapper("JVM_RawMonitorEnter");
3895 ((Mutex*) mon)->jvm_raw_lock();
3896 return 0;
3897 }
3898
3899
3900 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3901 VM_Exit::block_if_vm_exited();
3902 JVMWrapper("JVM_RawMonitorExit");
3903 ((Mutex*) mon)->jvm_raw_unlock();
3904 }
3905
3906
3907 // Support for Serialization
3908
3909 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3910 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3911 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3912 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3913
3914 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3915 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3916 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3917 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3918
3919
3920 void initialize_converter_functions() {
3921 if (JDK_Version::is_gte_jdk14x_version()) {
3922 // These functions only exist for compatibility with 1.3.1 and earlier
3923 return;
3924 }
3925
3926 // called from universe_post_init()
3927 assert(
3928 int_bits_to_float_fn == NULL &&
3929 long_bits_to_double_fn == NULL &&
3930 float_to_int_bits_fn == NULL &&
3931 double_to_long_bits_fn == NULL ,
3932 "initialization done twice"
3933 );
3934 // initialize
3935 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3936 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3937 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3938 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3939 // verify
3940 assert(
3941 int_bits_to_float_fn != NULL &&
3942 long_bits_to_double_fn != NULL &&
3943 float_to_int_bits_fn != NULL &&
3944 double_to_long_bits_fn != NULL ,
3945 "initialization failed"
3946 );
3947 }
3948
3949
3950
3951 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3952
3953 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3954 // Security Note:
3955 // The Java level wrapper will perform the necessary security check allowing
3956 // us to pass the NULL as the initiating class loader.
3957 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3958
3959 KlassHandle klass_handle(THREAD, klass);
3960 // Check if we should initialize the class
3961 if (init && klass_handle->oop_is_instance()) {
3962 klass_handle->initialize(CHECK_NULL);
3963 }
3964 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3965 }
3966
3967
3968 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3969
3970 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3971 JVMWrapper("JVM_InvokeMethod");
3972 Handle method_handle;
3973 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3974 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3975 Handle receiver(THREAD, JNIHandles::resolve(obj));
3976 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3977 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3978 jobject res = JNIHandles::make_local(env, result);
3979 if (JvmtiExport::should_post_vm_object_alloc()) {
3980 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3981 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3982 if (java_lang_Class::is_primitive(ret_type)) {
3983 // Only for primitive type vm allocates memory for java object.
3984 // See box() method.
3985 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3986 }
3987 }
3988 return res;
3989 } else {
3990 THROW_0(vmSymbols::java_lang_StackOverflowError());
3991 }
3992 JVM_END
3993
3994
3995 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3996 JVMWrapper("JVM_NewInstanceFromConstructor");
3997 oop constructor_mirror = JNIHandles::resolve(c);
3998 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3999 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4000 jobject res = JNIHandles::make_local(env, result);
4001 if (JvmtiExport::should_post_vm_object_alloc()) {
4002 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4003 }
4004 return res;
4005 JVM_END
4006
4007 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4008
4009 JVM_LEAF(jboolean, JVM_SupportsCX8())
4010 JVMWrapper("JVM_SupportsCX8");
4011 return VM_Version::supports_cx8();
4012 JVM_END
4013
4014
4015 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4016 JVMWrapper("JVM_CX8Field");
4017 jlong res;
4018 oop o = JNIHandles::resolve(obj);
4019 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4020 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4021
4022 assert(VM_Version::supports_cx8(), "cx8 not supported");
4023 res = Atomic::cmpxchg(newVal, addr, oldVal);
4024
4025 return res == oldVal;
4026 JVM_END
4027
4028 // DTrace ///////////////////////////////////////////////////////////////////
4029
4030 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4031 JVMWrapper("JVM_DTraceGetVersion");
4032 return (jint)JVM_TRACING_DTRACE_VERSION;
4033 JVM_END
4034
4035 JVM_ENTRY(jlong,JVM_DTraceActivate(
4036 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4037 JVM_DTraceProvider* providers))
4038 JVMWrapper("JVM_DTraceActivate");
4039 return DTraceJSDT::activate(
4040 version, module_name, providers_count, providers, CHECK_0);
4041 JVM_END
4042
4043 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4044 JVMWrapper("JVM_DTraceIsProbeEnabled");
4045 return DTraceJSDT::is_probe_enabled(method);
4046 JVM_END
4047
4048 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4049 JVMWrapper("JVM_DTraceDispose");
4050 DTraceJSDT::dispose(handle);
4051 JVM_END
4052
4053 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4054 JVMWrapper("JVM_DTraceIsSupported");
4055 return DTraceJSDT::is_supported();
4056 JVM_END
4057
4058 // Returns an array of all live Thread objects (VM internal JavaThreads,
4059 // jvmti agent threads, and JNI attaching threads are skipped)
4060 // See CR 6404306 regarding JNI attaching threads
4061 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4062 ResourceMark rm(THREAD);
4063 ThreadsListEnumerator tle(THREAD, false, false);
4064 JvmtiVMObjectAllocEventCollector oam;
4065
4066 int num_threads = tle.num_threads();
4067 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4068 objArrayHandle threads_ah(THREAD, r);
4069
4070 for (int i = 0; i < num_threads; i++) {
4071 Handle h = tle.get_threadObj(i);
4072 threads_ah->obj_at_put(i, h());
4073 }
4074
4075 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4076 JVM_END
4077
4078
4079 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4080 // Return StackTraceElement[][], each element is the stack trace of a thread in
4081 // the corresponding entry in the given threads array
4082 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4083 JVMWrapper("JVM_DumpThreads");
4084 JvmtiVMObjectAllocEventCollector oam;
4085
4086 // Check if threads is null
4087 if (threads == NULL) {
4088 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4089 }
4090
4091 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4092 objArrayHandle ah(THREAD, a);
4093 int num_threads = ah->length();
4094 // check if threads is non-empty array
4095 if (num_threads == 0) {
4096 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4097 }
4098
4099 // check if threads is not an array of objects of Thread class
4100 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4101 if (k != SystemDictionary::Thread_klass()) {
4102 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4103 }
4104
4105 ResourceMark rm(THREAD);
4106
4107 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4108 for (int i = 0; i < num_threads; i++) {
4109 oop thread_obj = ah->obj_at(i);
4110 instanceHandle h(THREAD, (instanceOop) thread_obj);
4111 thread_handle_array->append(h);
4112 }
4113
4114 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4115 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4116
4117 JVM_END
4118
4119 // JVM monitoring and management support
4120 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4121 return Management::get_jmm_interface(version);
4122 JVM_END
4123
4124 // com.sun.tools.attach.VirtualMachine agent properties support
4125 //
4126 // Initialize the agent properties with the properties maintained in the VM
4127 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4128 JVMWrapper("JVM_InitAgentProperties");
4129 ResourceMark rm;
4130
4131 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4132
4133 PUTPROP(props, "sun.java.command", Arguments::java_command());
4134 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4135 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4136 return properties;
4137 JVM_END
4138
4139 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4140 {
4141 JVMWrapper("JVM_GetEnclosingMethodInfo");
4142 JvmtiVMObjectAllocEventCollector oam;
4143
4144 if (ofClass == NULL) {
4145 return NULL;
4146 }
4147 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4148 // Special handling for primitive objects
4149 if (java_lang_Class::is_primitive(mirror())) {
4150 return NULL;
4151 }
4152 Klass* k = java_lang_Class::as_Klass(mirror());
4153 if (!k->oop_is_instance()) {
4154 return NULL;
4155 }
4156 instanceKlassHandle ik_h(THREAD, k);
4157 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4158 if (encl_method_class_idx == 0) {
4159 return NULL;
4160 }
4161 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4162 objArrayHandle dest(THREAD, dest_o);
4163 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4164 dest->obj_at_put(0, enc_k->java_mirror());
4165 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4166 if (encl_method_method_idx != 0) {
4167 Symbol* sym = ik_h->constants()->symbol_at(
4168 extract_low_short_from_int(
4169 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4170 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4171 dest->obj_at_put(1, str());
4172 sym = ik_h->constants()->symbol_at(
4173 extract_high_short_from_int(
4174 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4175 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4176 dest->obj_at_put(2, str());
4177 }
4178 return (jobjectArray) JNIHandles::make_local(dest());
4179 }
4180 JVM_END
4181
4182 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4183 jint javaThreadState))
4184 {
4185 // If new thread states are added in future JDK and VM versions,
4186 // this should check if the JDK version is compatible with thread
4187 // states supported by the VM. Return NULL if not compatible.
4188 //
4189 // This function must map the VM java_lang_Thread::ThreadStatus
4190 // to the Java thread state that the JDK supports.
4191 //
4192
4193 typeArrayHandle values_h;
4194 switch (javaThreadState) {
4195 case JAVA_THREAD_STATE_NEW : {
4196 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4197 values_h = typeArrayHandle(THREAD, r);
4198 values_h->int_at_put(0, java_lang_Thread::NEW);
4199 break;
4200 }
4201 case JAVA_THREAD_STATE_RUNNABLE : {
4202 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4203 values_h = typeArrayHandle(THREAD, r);
4204 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4205 break;
4206 }
4207 case JAVA_THREAD_STATE_BLOCKED : {
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::BLOCKED_ON_MONITOR_ENTER);
4211 break;
4212 }
4213 case JAVA_THREAD_STATE_WAITING : {
4214 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4215 values_h = typeArrayHandle(THREAD, r);
4216 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4217 values_h->int_at_put(1, java_lang_Thread::PARKED);
4218 break;
4219 }
4220 case JAVA_THREAD_STATE_TIMED_WAITING : {
4221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4222 values_h = typeArrayHandle(THREAD, r);
4223 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4224 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4225 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4226 break;
4227 }
4228 case JAVA_THREAD_STATE_TERMINATED : {
4229 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4230 values_h = typeArrayHandle(THREAD, r);
4231 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4232 break;
4233 }
4234 default:
4235 // Unknown state - probably incompatible JDK version
4236 return NULL;
4237 }
4238
4239 return (jintArray) JNIHandles::make_local(env, values_h());
4240 }
4241 JVM_END
4242
4243
4244 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4245 jint javaThreadState,
4246 jintArray values))
4247 {
4248 // If new thread states are added in future JDK and VM versions,
4249 // this should check if the JDK version is compatible with thread
4250 // states supported by the VM. Return NULL if not compatible.
4251 //
4252 // This function must map the VM java_lang_Thread::ThreadStatus
4253 // to the Java thread state that the JDK supports.
4254 //
4255
4256 ResourceMark rm;
4257
4258 // Check if threads is null
4259 if (values == NULL) {
4260 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4261 }
4262
4263 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4264 typeArrayHandle values_h(THREAD, v);
4265
4266 objArrayHandle names_h;
4267 switch (javaThreadState) {
4268 case JAVA_THREAD_STATE_NEW : {
4269 assert(values_h->length() == 1 &&
4270 values_h->int_at(0) == java_lang_Thread::NEW,
4271 "Invalid threadStatus value");
4272
4273 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4274 1, /* only 1 substate */
4275 CHECK_NULL);
4276 names_h = objArrayHandle(THREAD, r);
4277 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4278 names_h->obj_at_put(0, name());
4279 break;
4280 }
4281 case JAVA_THREAD_STATE_RUNNABLE : {
4282 assert(values_h->length() == 1 &&
4283 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4284 "Invalid threadStatus value");
4285
4286 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4287 1, /* only 1 substate */
4288 CHECK_NULL);
4289 names_h = objArrayHandle(THREAD, r);
4290 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4291 names_h->obj_at_put(0, name());
4292 break;
4293 }
4294 case JAVA_THREAD_STATE_BLOCKED : {
4295 assert(values_h->length() == 1 &&
4296 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4297 "Invalid threadStatus value");
4298
4299 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4300 1, /* only 1 substate */
4301 CHECK_NULL);
4302 names_h = objArrayHandle(THREAD, r);
4303 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4304 names_h->obj_at_put(0, name());
4305 break;
4306 }
4307 case JAVA_THREAD_STATE_WAITING : {
4308 assert(values_h->length() == 2 &&
4309 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4310 values_h->int_at(1) == java_lang_Thread::PARKED,
4311 "Invalid threadStatus value");
4312 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4313 2, /* number of substates */
4314 CHECK_NULL);
4315 names_h = objArrayHandle(THREAD, r);
4316 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4317 CHECK_NULL);
4318 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4319 CHECK_NULL);
4320 names_h->obj_at_put(0, name0());
4321 names_h->obj_at_put(1, name1());
4322 break;
4323 }
4324 case JAVA_THREAD_STATE_TIMED_WAITING : {
4325 assert(values_h->length() == 3 &&
4326 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4327 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4328 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4329 "Invalid threadStatus value");
4330 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4331 3, /* number of substates */
4332 CHECK_NULL);
4333 names_h = objArrayHandle(THREAD, r);
4334 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4335 CHECK_NULL);
4336 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4337 CHECK_NULL);
4338 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4339 CHECK_NULL);
4340 names_h->obj_at_put(0, name0());
4341 names_h->obj_at_put(1, name1());
4342 names_h->obj_at_put(2, name2());
4343 break;
4344 }
4345 case JAVA_THREAD_STATE_TERMINATED : {
4346 assert(values_h->length() == 1 &&
4347 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4348 "Invalid threadStatus value");
4349 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4350 1, /* only 1 substate */
4351 CHECK_NULL);
4352 names_h = objArrayHandle(THREAD, r);
4353 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4354 names_h->obj_at_put(0, name());
4355 break;
4356 }
4357 default:
4358 // Unknown state - probably incompatible JDK version
4359 return NULL;
4360 }
4361 return (jobjectArray) JNIHandles::make_local(env, names_h());
4362 }
4363 JVM_END
4364
4365 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4366 {
4367 memset(info, 0, info_size);
4368
4369 info->jvm_version = Abstract_VM_Version::jvm_version();
4370 info->update_version = 0; /* 0 in HotSpot Express VM */
4371 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4372
4373 // when we add a new capability in the jvm_version_info struct, we should also
4374 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4375 // counter defined in runtimeService.cpp.
4376 info->is_attachable = AttachListener::is_attach_supported();
4377 }
4378 JVM_END