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 false);
1220 methodHandle m (THREAD, m_oop);
1221 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1222 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1223 }
1224
1225 // Stack allocated list of privileged stack elements
1226 PrivilegedElement pi;
1227 if (!vfst.at_end()) {
1228 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1229 thread->set_privileged_stack_top(&pi);
1230 }
1231
1232
1233 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1234 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1235 Handle pending_exception;
1236 JavaValue result(T_OBJECT);
1237 JavaCallArguments args(object);
1238 JavaCalls::call(&result, m, &args, THREAD);
1239
1240 // done with action, remove ourselves from the list
1241 if (!vfst.at_end()) {
1242 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1243 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1244 }
1245
1246 if (HAS_PENDING_EXCEPTION) {
1247 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1248 CLEAR_PENDING_EXCEPTION;
1249 // JVMTI has already reported the pending exception
1250 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1251 if (THREAD->is_Java_thread()) {
1252 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1253 }
1254 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1255 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1256 // Throw a java.security.PrivilegedActionException(Exception e) exception
1257 JavaCallArguments args(pending_exception);
1258 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1259 vmSymbols::exception_void_signature(),
1260 &args);
1261 }
1262 }
1263
1264 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1265 return JNIHandles::make_local(env, (oop) result.get_jobject());
1266 JVM_END
1267
1268
1269 // Returns the inherited_access_control_context field of the running thread.
1270 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1271 JVMWrapper("JVM_GetInheritedAccessControlContext");
1272 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1273 return JNIHandles::make_local(env, result);
1274 JVM_END
1275
1276 class RegisterArrayForGC {
1277 private:
1278 JavaThread *_thread;
1279 public:
1280 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1281 _thread = thread;
1282 _thread->register_array_for_gc(array);
1283 }
1284
1285 ~RegisterArrayForGC() {
1286 _thread->register_array_for_gc(NULL);
1287 }
1288 };
1289
1290
1291 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1292 JVMWrapper("JVM_GetStackAccessControlContext");
1293 if (!UsePrivilegedStack) return NULL;
1294
1295 ResourceMark rm(THREAD);
1296 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1297 JvmtiVMObjectAllocEventCollector oam;
1298
1299 // count the protection domains on the execution stack. We collapse
1300 // duplicate consecutive protection domains into a single one, as
1301 // well as stopping when we hit a privileged frame.
1302
1303 // Use vframeStream to iterate through Java frames
1304 vframeStream vfst(thread);
1305
1306 oop previous_protection_domain = NULL;
1307 Handle privileged_context(thread, NULL);
1308 bool is_privileged = false;
1309 oop protection_domain = NULL;
1310
1311 for(; !vfst.at_end(); vfst.next()) {
1312 // get method of frame
1313 Method* method = vfst.method();
1314 intptr_t* frame_id = vfst.frame_id();
1315
1316 // check the privileged frames to see if we have a match
1317 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1318 // this frame is privileged
1319 is_privileged = true;
1320 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1321 protection_domain = thread->privileged_stack_top()->protection_domain();
1322 } else {
1323 protection_domain = method->method_holder()->protection_domain();
1324 }
1325
1326 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1327 local_array->push(protection_domain);
1328 previous_protection_domain = protection_domain;
1329 }
1330
1331 if (is_privileged) break;
1332 }
1333
1334
1335 // either all the domains on the stack were system domains, or
1336 // we had a privileged system domain
1337 if (local_array->is_empty()) {
1338 if (is_privileged && privileged_context.is_null()) return NULL;
1339
1340 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1341 return JNIHandles::make_local(env, result);
1342 }
1343
1344 // the resource area must be registered in case of a gc
1345 RegisterArrayForGC ragc(thread, local_array);
1346 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1347 local_array->length(), CHECK_NULL);
1348 objArrayHandle h_context(thread, context);
1349 for (int index = 0; index < local_array->length(); index++) {
1350 h_context->obj_at_put(index, local_array->at(index));
1351 }
1352
1353 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1354
1355 return JNIHandles::make_local(env, result);
1356 JVM_END
1357
1358
1359 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1360 JVMWrapper("JVM_IsArrayClass");
1361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1362 return (k != NULL) && k->oop_is_array() ? true : false;
1363 JVM_END
1364
1365
1366 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1367 JVMWrapper("JVM_IsPrimitiveClass");
1368 oop mirror = JNIHandles::resolve_non_null(cls);
1369 return (jboolean) java_lang_Class::is_primitive(mirror);
1370 JVM_END
1371
1372
1373 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1374 JVMWrapper("JVM_GetComponentType");
1375 oop mirror = JNIHandles::resolve_non_null(cls);
1376 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1377 return (jclass) JNIHandles::make_local(env, result);
1378 JVM_END
1379
1380
1381 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1382 JVMWrapper("JVM_GetClassModifiers");
1383 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1384 // Primitive type
1385 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1386 }
1387
1388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1389 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1390 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1391 return k->modifier_flags();
1392 JVM_END
1393
1394
1395 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1396
1397 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1398 JvmtiVMObjectAllocEventCollector oam;
1399 // ofClass is a reference to a java_lang_Class object. The mirror object
1400 // of an InstanceKlass
1401
1402 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1403 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1404 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1405 return (jobjectArray)JNIHandles::make_local(env, result);
1406 }
1407
1408 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1409 InnerClassesIterator iter(k);
1410
1411 if (iter.length() == 0) {
1412 // Neither an inner nor outer class
1413 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1414 return (jobjectArray)JNIHandles::make_local(env, result);
1415 }
1416
1417 // find inner class info
1418 constantPoolHandle cp(thread, k->constants());
1419 int length = iter.length();
1420
1421 // Allocate temp. result array
1422 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1423 objArrayHandle result (THREAD, r);
1424 int members = 0;
1425
1426 for (; !iter.done(); iter.next()) {
1427 int ioff = iter.inner_class_info_index();
1428 int ooff = iter.outer_class_info_index();
1429
1430 if (ioff != 0 && ooff != 0) {
1431 // Check to see if the name matches the class we're looking for
1432 // before attempting to find the class.
1433 if (cp->klass_name_at_matches(k, ooff)) {
1434 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1435 if (outer_klass == k()) {
1436 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1437 instanceKlassHandle inner_klass (THREAD, ik);
1438
1439 // Throws an exception if outer klass has not declared k as
1440 // an inner klass
1441 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1442
1443 result->obj_at_put(members, inner_klass->java_mirror());
1444 members++;
1445 }
1446 }
1447 }
1448 }
1449
1450 if (members != length) {
1451 // Return array of right length
1452 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1453 for(int i = 0; i < members; i++) {
1454 res->obj_at_put(i, result->obj_at(i));
1455 }
1456 return (jobjectArray)JNIHandles::make_local(env, res);
1457 }
1458
1459 return (jobjectArray)JNIHandles::make_local(env, result());
1460 JVM_END
1461
1462
1463 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1464 {
1465 // ofClass is a reference to a java_lang_Class object.
1466 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1467 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1468 return NULL;
1469 }
1470
1471 bool inner_is_member = false;
1472 Klass* outer_klass
1473 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1474 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1475 if (outer_klass == NULL) return NULL; // already a top-level class
1476 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1477 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1478 }
1479 JVM_END
1480
1481 // should be in InstanceKlass.cpp, but is here for historical reasons
1482 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1483 bool* inner_is_member,
1484 TRAPS) {
1485 Thread* thread = THREAD;
1486 InnerClassesIterator iter(k);
1487 if (iter.length() == 0) {
1488 // No inner class info => no declaring class
1489 return NULL;
1490 }
1491
1492 constantPoolHandle i_cp(thread, k->constants());
1493
1494 bool found = false;
1495 Klass* ok;
1496 instanceKlassHandle outer_klass;
1497 *inner_is_member = false;
1498
1499 // Find inner_klass attribute
1500 for (; !iter.done() && !found; iter.next()) {
1501 int ioff = iter.inner_class_info_index();
1502 int ooff = iter.outer_class_info_index();
1503 int noff = iter.inner_name_index();
1504 if (ioff != 0) {
1505 // Check to see if the name matches the class we're looking for
1506 // before attempting to find the class.
1507 if (i_cp->klass_name_at_matches(k, ioff)) {
1508 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1509 found = (k() == inner_klass);
1510 if (found && ooff != 0) {
1511 ok = i_cp->klass_at(ooff, CHECK_NULL);
1512 outer_klass = instanceKlassHandle(thread, ok);
1513 *inner_is_member = true;
1514 }
1515 }
1516 }
1517 }
1518
1519 if (found && outer_klass.is_null()) {
1520 // It may be anonymous; try for that.
1521 int encl_method_class_idx = k->enclosing_method_class_index();
1522 if (encl_method_class_idx != 0) {
1523 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1524 outer_klass = instanceKlassHandle(thread, ok);
1525 *inner_is_member = false;
1526 }
1527 }
1528
1529 // If no inner class attribute found for this class.
1530 if (outer_klass.is_null()) return NULL;
1531
1532 // Throws an exception if outer klass has not declared k as an inner klass
1533 // We need evidence that each klass knows about the other, or else
1534 // the system could allow a spoof of an inner class to gain access rights.
1535 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1536 return outer_klass();
1537 }
1538
1539 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1540 assert (cls != NULL, "illegal class");
1541 JVMWrapper("JVM_GetClassSignature");
1542 JvmtiVMObjectAllocEventCollector oam;
1543 ResourceMark rm(THREAD);
1544 // Return null for arrays and primatives
1545 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1547 if (k->oop_is_instance()) {
1548 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1549 if (sym == NULL) return NULL;
1550 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1551 return (jstring) JNIHandles::make_local(env, str());
1552 }
1553 }
1554 return NULL;
1555 JVM_END
1556
1557
1558 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1559 assert (cls != NULL, "illegal class");
1560 JVMWrapper("JVM_GetClassAnnotations");
1561
1562 // Return null for arrays and primitives
1563 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1565 if (k->oop_is_instance()) {
1566 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1567 return (jbyteArray) JNIHandles::make_local(env, a);
1568 }
1569 }
1570 return NULL;
1571 JVM_END
1572
1573
1574 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1575 // some of this code was adapted from from jni_FromReflectedField
1576
1577 oop reflected = JNIHandles::resolve_non_null(field);
1578 oop mirror = java_lang_reflect_Field::clazz(reflected);
1579 Klass* k = java_lang_Class::as_Klass(mirror);
1580 int slot = java_lang_reflect_Field::slot(reflected);
1581 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1582
1583 KlassHandle kh(THREAD, k);
1584 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1585
1586 if (modifiers & JVM_ACC_STATIC) {
1587 // for static fields we only look in the current class
1588 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1589 assert(false, "cannot find static field");
1590 return false;
1591 }
1592 } else {
1593 // for instance fields we start with the current class and work
1594 // our way up through the superclass chain
1595 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1596 assert(false, "cannot find instance field");
1597 return false;
1598 }
1599 }
1600 return true;
1601 }
1602
1603 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1604 // field is a handle to a java.lang.reflect.Field object
1605 assert(field != NULL, "illegal field");
1606 JVMWrapper("JVM_GetFieldAnnotations");
1607
1608 fieldDescriptor fd;
1609 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1610 if (!gotFd) {
1611 return NULL;
1612 }
1613
1614 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1615 JVM_END
1616
1617
1618 static Method* jvm_get_method_common(jobject method) {
1619 // some of this code was adapted from from jni_FromReflectedMethod
1620
1621 oop reflected = JNIHandles::resolve_non_null(method);
1622 oop mirror = NULL;
1623 int slot = 0;
1624
1625 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1626 mirror = java_lang_reflect_Constructor::clazz(reflected);
1627 slot = java_lang_reflect_Constructor::slot(reflected);
1628 } else {
1629 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1630 "wrong type");
1631 mirror = java_lang_reflect_Method::clazz(reflected);
1632 slot = java_lang_reflect_Method::slot(reflected);
1633 }
1634 Klass* k = java_lang_Class::as_Klass(mirror);
1635
1636 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1637 assert(m != NULL, "cannot find method");
1638 return m; // caller has to deal with NULL in product mode
1639 }
1640
1641
1642 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1643 JVMWrapper("JVM_GetMethodAnnotations");
1644
1645 // method is a handle to a java.lang.reflect.Method object
1646 Method* m = jvm_get_method_common(method);
1647 if (m == NULL) {
1648 return NULL;
1649 }
1650
1651 return (jbyteArray) JNIHandles::make_local(env,
1652 Annotations::make_java_array(m->annotations(), THREAD));
1653 JVM_END
1654
1655
1656 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1657 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1658
1659 // method is a handle to a java.lang.reflect.Method object
1660 Method* m = jvm_get_method_common(method);
1661 if (m == NULL) {
1662 return NULL;
1663 }
1664
1665 return (jbyteArray) JNIHandles::make_local(env,
1666 Annotations::make_java_array(m->annotation_default(), THREAD));
1667 JVM_END
1668
1669
1670 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1671 JVMWrapper("JVM_GetMethodParameterAnnotations");
1672
1673 // method is a handle to a java.lang.reflect.Method object
1674 Method* m = jvm_get_method_common(method);
1675 if (m == NULL) {
1676 return NULL;
1677 }
1678
1679 return (jbyteArray) JNIHandles::make_local(env,
1680 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1681 JVM_END
1682
1683 /* Type use annotations support (JDK 1.8) */
1684
1685 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1686 assert (cls != NULL, "illegal class");
1687 JVMWrapper("JVM_GetClassTypeAnnotations");
1688 ResourceMark rm(THREAD);
1689 // Return null for arrays and primitives
1690 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1691 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1692 if (k->oop_is_instance()) {
1693 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1694 if (type_annotations != NULL) {
1695 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1696 return (jbyteArray) JNIHandles::make_local(env, a);
1697 }
1698 }
1699 }
1700 return NULL;
1701 JVM_END
1702
1703 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1704 assert (method != NULL, "illegal method");
1705 JVMWrapper("JVM_GetMethodTypeAnnotations");
1706
1707 // method is a handle to a java.lang.reflect.Method object
1708 Method* m = jvm_get_method_common(method);
1709 if (m == NULL) {
1710 return NULL;
1711 }
1712
1713 AnnotationArray* type_annotations = m->type_annotations();
1714 if (type_annotations != NULL) {
1715 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1716 return (jbyteArray) JNIHandles::make_local(env, a);
1717 }
1718
1719 return NULL;
1720 JVM_END
1721
1722 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1723 assert (field != NULL, "illegal field");
1724 JVMWrapper("JVM_GetFieldTypeAnnotations");
1725
1726 fieldDescriptor fd;
1727 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1728 if (!gotFd) {
1729 return NULL;
1730 }
1731
1732 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1733 JVM_END
1734
1735 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1736 if (!cp->is_within_bounds(index)) {
1737 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1738 }
1739 }
1740
1741 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1742 {
1743 JVMWrapper("JVM_GetMethodParameters");
1744 // method is a handle to a java.lang.reflect.Method object
1745 Method* method_ptr = jvm_get_method_common(method);
1746 methodHandle mh (THREAD, method_ptr);
1747 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1748 const int num_params = mh->method_parameters_length();
1749
1750 if (0 != num_params) {
1751 // make sure all the symbols are properly formatted
1752 for (int i = 0; i < num_params; i++) {
1753 MethodParametersElement* params = mh->method_parameters_start();
1754 int index = params[i].name_cp_index;
1755 bounds_check(mh->constants(), index, CHECK_NULL);
1756
1757 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1758 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1759 "Wrong type at constant pool index");
1760 }
1761
1762 }
1763
1764 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1765 objArrayHandle result (THREAD, result_oop);
1766
1767 for (int i = 0; i < num_params; i++) {
1768 MethodParametersElement* params = mh->method_parameters_start();
1769 // For a 0 index, give a NULL symbol
1770 Symbol* sym = 0 != params[i].name_cp_index ?
1771 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1772 int flags = params[i].flags;
1773 oop param = Reflection::new_parameter(reflected_method, i, sym,
1774 flags, CHECK_NULL);
1775 result->obj_at_put(i, param);
1776 }
1777 return (jobjectArray)JNIHandles::make_local(env, result());
1778 } else {
1779 return (jobjectArray)NULL;
1780 }
1781 }
1782 JVM_END
1783
1784 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1785
1786 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1787 {
1788 JVMWrapper("JVM_GetClassDeclaredFields");
1789 JvmtiVMObjectAllocEventCollector oam;
1790
1791 // Exclude primitive types and array types
1792 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1793 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1794 // Return empty array
1795 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1796 return (jobjectArray) JNIHandles::make_local(env, res);
1797 }
1798
1799 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1800 constantPoolHandle cp(THREAD, k->constants());
1801
1802 // Ensure class is linked
1803 k->link_class(CHECK_NULL);
1804
1805 // 4496456 We need to filter out java.lang.Throwable.backtrace
1806 bool skip_backtrace = false;
1807
1808 // Allocate result
1809 int num_fields;
1810
1811 if (publicOnly) {
1812 num_fields = 0;
1813 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1814 if (fs.access_flags().is_public()) ++num_fields;
1815 }
1816 } else {
1817 num_fields = k->java_fields_count();
1818
1819 if (k() == SystemDictionary::Throwable_klass()) {
1820 num_fields--;
1821 skip_backtrace = true;
1822 }
1823 }
1824
1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1826 objArrayHandle result (THREAD, r);
1827
1828 int out_idx = 0;
1829 fieldDescriptor fd;
1830 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1831 if (skip_backtrace) {
1832 // 4496456 skip java.lang.Throwable.backtrace
1833 int offset = fs.offset();
1834 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1835 }
1836
1837 if (!publicOnly || fs.access_flags().is_public()) {
1838 fd.reinitialize(k(), fs.index());
1839 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1840 result->obj_at_put(out_idx, field);
1841 ++out_idx;
1842 }
1843 }
1844 assert(out_idx == num_fields, "just checking");
1845 return (jobjectArray) JNIHandles::make_local(env, result());
1846 }
1847 JVM_END
1848
1849 static bool select_method(methodHandle method, bool want_constructor) {
1850 if (want_constructor) {
1851 return (method->is_initializer() && !method->is_static());
1852 } else {
1853 return (!method->is_initializer() && !method->is_overpass());
1854 }
1855 }
1856
1857 static jobjectArray get_class_declared_methods_helper(
1858 JNIEnv *env,
1859 jclass ofClass, jboolean publicOnly,
1860 bool want_constructor,
1861 Klass* klass, TRAPS) {
1862
1863 JvmtiVMObjectAllocEventCollector oam;
1864
1865 // Exclude primitive types and array types
1866 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1867 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1868 // Return empty array
1869 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1870 return (jobjectArray) JNIHandles::make_local(env, res);
1871 }
1872
1873 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1874
1875 // Ensure class is linked
1876 k->link_class(CHECK_NULL);
1877
1878 Array<Method*>* methods = k->methods();
1879 int methods_length = methods->length();
1880
1881 // Save original method_idnum in case of redefinition, which can change
1882 // the idnum of obsolete methods. The new method will have the same idnum
1883 // but if we refresh the methods array, the counts will be wrong.
1884 ResourceMark rm(THREAD);
1885 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1886 int num_methods = 0;
1887
1888 for (int i = 0; i < methods_length; i++) {
1889 methodHandle method(THREAD, methods->at(i));
1890 if (select_method(method, want_constructor)) {
1891 if (!publicOnly || method->is_public()) {
1892 idnums->push(method->method_idnum());
1893 ++num_methods;
1894 }
1895 }
1896 }
1897
1898 // Allocate result
1899 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1900 objArrayHandle result (THREAD, r);
1901
1902 // Now just put the methods that we selected above, but go by their idnum
1903 // in case of redefinition. The methods can be redefined at any safepoint,
1904 // so above when allocating the oop array and below when creating reflect
1905 // objects.
1906 for (int i = 0; i < num_methods; i++) {
1907 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1908 if (method.is_null()) {
1909 // Method may have been deleted and seems this API can handle null
1910 // Otherwise should probably put a method that throws NSME
1911 result->obj_at_put(i, NULL);
1912 } else {
1913 oop m;
1914 if (want_constructor) {
1915 m = Reflection::new_constructor(method, CHECK_NULL);
1916 } else {
1917 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1918 }
1919 result->obj_at_put(i, m);
1920 }
1921 }
1922
1923 return (jobjectArray) JNIHandles::make_local(env, result());
1924 }
1925
1926 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1927 {
1928 JVMWrapper("JVM_GetClassDeclaredMethods");
1929 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1930 /*want_constructor*/ false,
1931 SystemDictionary::reflect_Method_klass(), THREAD);
1932 }
1933 JVM_END
1934
1935 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1936 {
1937 JVMWrapper("JVM_GetClassDeclaredConstructors");
1938 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1939 /*want_constructor*/ true,
1940 SystemDictionary::reflect_Constructor_klass(), THREAD);
1941 }
1942 JVM_END
1943
1944 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1945 {
1946 JVMWrapper("JVM_GetClassAccessFlags");
1947 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1948 // Primitive type
1949 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1950 }
1951
1952 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1953 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1954 }
1955 JVM_END
1956
1957
1958 // Constant pool access //////////////////////////////////////////////////////////
1959
1960 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1961 {
1962 JVMWrapper("JVM_GetClassConstantPool");
1963 JvmtiVMObjectAllocEventCollector oam;
1964
1965 // Return null for primitives and arrays
1966 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1967 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1968 if (k->oop_is_instance()) {
1969 instanceKlassHandle k_h(THREAD, k);
1970 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1971 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1972 return JNIHandles::make_local(jcp());
1973 }
1974 }
1975 return NULL;
1976 }
1977 JVM_END
1978
1979
1980 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1981 {
1982 JVMWrapper("JVM_ConstantPoolGetSize");
1983 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1984 return cp->length();
1985 }
1986 JVM_END
1987
1988
1989 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1990 {
1991 JVMWrapper("JVM_ConstantPoolGetClassAt");
1992 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1993 bounds_check(cp, index, CHECK_NULL);
1994 constantTag tag = cp->tag_at(index);
1995 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1996 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1997 }
1998 Klass* k = cp->klass_at(index, CHECK_NULL);
1999 return (jclass) JNIHandles::make_local(k->java_mirror());
2000 }
2001 JVM_END
2002
2003 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2004 {
2005 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2006 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2007 bounds_check(cp, index, CHECK_NULL);
2008 constantTag tag = cp->tag_at(index);
2009 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2010 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2011 }
2012 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2013 if (k == NULL) return NULL;
2014 return (jclass) JNIHandles::make_local(k->java_mirror());
2015 }
2016 JVM_END
2017
2018 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2019 constantTag tag = cp->tag_at(index);
2020 if (!tag.is_method() && !tag.is_interface_method()) {
2021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2022 }
2023 int klass_ref = cp->uncached_klass_ref_index_at(index);
2024 Klass* k_o;
2025 if (force_resolution) {
2026 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2027 } else {
2028 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2029 if (k_o == NULL) return NULL;
2030 }
2031 instanceKlassHandle k(THREAD, k_o);
2032 Symbol* name = cp->uncached_name_ref_at(index);
2033 Symbol* sig = cp->uncached_signature_ref_at(index);
2034 methodHandle m (THREAD, k->find_method(name, sig));
2035 if (m.is_null()) {
2036 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2037 }
2038 oop method;
2039 if (!m->is_initializer() || m->is_static()) {
2040 method = Reflection::new_method(m, true, true, CHECK_NULL);
2041 } else {
2042 method = Reflection::new_constructor(m, CHECK_NULL);
2043 }
2044 return JNIHandles::make_local(method);
2045 }
2046
2047 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2048 {
2049 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2050 JvmtiVMObjectAllocEventCollector oam;
2051 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2052 bounds_check(cp, index, CHECK_NULL);
2053 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2054 return res;
2055 }
2056 JVM_END
2057
2058 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2059 {
2060 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2061 JvmtiVMObjectAllocEventCollector oam;
2062 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2063 bounds_check(cp, index, CHECK_NULL);
2064 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2065 return res;
2066 }
2067 JVM_END
2068
2069 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2070 constantTag tag = cp->tag_at(index);
2071 if (!tag.is_field()) {
2072 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073 }
2074 int klass_ref = cp->uncached_klass_ref_index_at(index);
2075 Klass* k_o;
2076 if (force_resolution) {
2077 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2078 } else {
2079 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2080 if (k_o == NULL) return NULL;
2081 }
2082 instanceKlassHandle k(THREAD, k_o);
2083 Symbol* name = cp->uncached_name_ref_at(index);
2084 Symbol* sig = cp->uncached_signature_ref_at(index);
2085 fieldDescriptor fd;
2086 Klass* target_klass = k->find_field(name, sig, &fd);
2087 if (target_klass == NULL) {
2088 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2089 }
2090 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2091 return JNIHandles::make_local(field);
2092 }
2093
2094 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2095 {
2096 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2097 JvmtiVMObjectAllocEventCollector oam;
2098 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2099 bounds_check(cp, index, CHECK_NULL);
2100 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2101 return res;
2102 }
2103 JVM_END
2104
2105 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2106 {
2107 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2108 JvmtiVMObjectAllocEventCollector oam;
2109 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2110 bounds_check(cp, index, CHECK_NULL);
2111 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2112 return res;
2113 }
2114 JVM_END
2115
2116 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2117 {
2118 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2119 JvmtiVMObjectAllocEventCollector oam;
2120 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2121 bounds_check(cp, index, CHECK_NULL);
2122 constantTag tag = cp->tag_at(index);
2123 if (!tag.is_field_or_method()) {
2124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2125 }
2126 int klass_ref = cp->uncached_klass_ref_index_at(index);
2127 Symbol* klass_name = cp->klass_name_at(klass_ref);
2128 Symbol* member_name = cp->uncached_name_ref_at(index);
2129 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2130 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2131 objArrayHandle dest(THREAD, dest_o);
2132 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2133 dest->obj_at_put(0, str());
2134 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2135 dest->obj_at_put(1, str());
2136 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2137 dest->obj_at_put(2, str());
2138 return (jobjectArray) JNIHandles::make_local(dest());
2139 }
2140 JVM_END
2141
2142 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2143 {
2144 JVMWrapper("JVM_ConstantPoolGetIntAt");
2145 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2146 bounds_check(cp, index, CHECK_0);
2147 constantTag tag = cp->tag_at(index);
2148 if (!tag.is_int()) {
2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2150 }
2151 return cp->int_at(index);
2152 }
2153 JVM_END
2154
2155 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2156 {
2157 JVMWrapper("JVM_ConstantPoolGetLongAt");
2158 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2159 bounds_check(cp, index, CHECK_(0L));
2160 constantTag tag = cp->tag_at(index);
2161 if (!tag.is_long()) {
2162 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2163 }
2164 return cp->long_at(index);
2165 }
2166 JVM_END
2167
2168 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2169 {
2170 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2171 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2172 bounds_check(cp, index, CHECK_(0.0f));
2173 constantTag tag = cp->tag_at(index);
2174 if (!tag.is_float()) {
2175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2176 }
2177 return cp->float_at(index);
2178 }
2179 JVM_END
2180
2181 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2182 {
2183 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2184 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2185 bounds_check(cp, index, CHECK_(0.0));
2186 constantTag tag = cp->tag_at(index);
2187 if (!tag.is_double()) {
2188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2189 }
2190 return cp->double_at(index);
2191 }
2192 JVM_END
2193
2194 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2195 {
2196 JVMWrapper("JVM_ConstantPoolGetStringAt");
2197 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2198 bounds_check(cp, index, CHECK_NULL);
2199 constantTag tag = cp->tag_at(index);
2200 if (!tag.is_string()) {
2201 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2202 }
2203 oop str = cp->string_at(index, CHECK_NULL);
2204 return (jstring) JNIHandles::make_local(str);
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2209 {
2210 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2211 JvmtiVMObjectAllocEventCollector oam;
2212 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2213 bounds_check(cp, index, CHECK_NULL);
2214 constantTag tag = cp->tag_at(index);
2215 if (!tag.is_symbol()) {
2216 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2217 }
2218 Symbol* sym = cp->symbol_at(index);
2219 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2220 return (jstring) JNIHandles::make_local(str());
2221 }
2222 JVM_END
2223
2224
2225 // Assertion support. //////////////////////////////////////////////////////////
2226
2227 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2228 JVMWrapper("JVM_DesiredAssertionStatus");
2229 assert(cls != NULL, "bad class");
2230
2231 oop r = JNIHandles::resolve(cls);
2232 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2233 if (java_lang_Class::is_primitive(r)) return false;
2234
2235 Klass* k = java_lang_Class::as_Klass(r);
2236 assert(k->oop_is_instance(), "must be an instance klass");
2237 if (! k->oop_is_instance()) return false;
2238
2239 ResourceMark rm(THREAD);
2240 const char* name = k->name()->as_C_string();
2241 bool system_class = k->class_loader() == NULL;
2242 return JavaAssertions::enabled(name, system_class);
2243
2244 JVM_END
2245
2246
2247 // Return a new AssertionStatusDirectives object with the fields filled in with
2248 // command-line assertion arguments (i.e., -ea, -da).
2249 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2250 JVMWrapper("JVM_AssertionStatusDirectives");
2251 JvmtiVMObjectAllocEventCollector oam;
2252 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2253 return JNIHandles::make_local(env, asd);
2254 JVM_END
2255
2256 // Verification ////////////////////////////////////////////////////////////////////////////////
2257
2258 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2259
2260 // RedefineClasses support: bug 6214132 caused verification to fail.
2261 // All functions from this section should call the jvmtiThreadSate function:
2262 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2263 // The function returns a Klass* of the _scratch_class if the verifier
2264 // was invoked in the middle of the class redefinition.
2265 // Otherwise it returns its argument value which is the _the_class Klass*.
2266 // Please, refer to the description in the jvmtiThreadSate.hpp.
2267
2268 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2269 JVMWrapper("JVM_GetClassNameUTF");
2270 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 return k->name()->as_utf8();
2273 JVM_END
2274
2275
2276 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2277 JVMWrapper("JVM_GetClassCPTypes");
2278 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2279 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2280 // types will have length zero if this is not an InstanceKlass
2281 // (length is determined by call to JVM_GetClassCPEntriesCount)
2282 if (k->oop_is_instance()) {
2283 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2284 for (int index = cp->length() - 1; index >= 0; index--) {
2285 constantTag tag = cp->tag_at(index);
2286 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2287 }
2288 }
2289 JVM_END
2290
2291
2292 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2293 JVMWrapper("JVM_GetClassCPEntriesCount");
2294 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296 if (!k->oop_is_instance())
2297 return 0;
2298 return InstanceKlass::cast(k)->constants()->length();
2299 JVM_END
2300
2301
2302 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2303 JVMWrapper("JVM_GetClassFieldsCount");
2304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2305 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2306 if (!k->oop_is_instance())
2307 return 0;
2308 return InstanceKlass::cast(k)->java_fields_count();
2309 JVM_END
2310
2311
2312 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2313 JVMWrapper("JVM_GetClassMethodsCount");
2314 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316 if (!k->oop_is_instance())
2317 return 0;
2318 return InstanceKlass::cast(k)->methods()->length();
2319 JVM_END
2320
2321
2322 // The following methods, used for the verifier, are never called with
2323 // array klasses, so a direct cast to InstanceKlass is safe.
2324 // Typically, these methods are called in a loop with bounds determined
2325 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2326 // zero for arrays.
2327 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2328 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2332 int length = method->checked_exceptions_length();
2333 if (length > 0) {
2334 CheckedExceptionElement* table= method->checked_exceptions_start();
2335 for (int i = 0; i < length; i++) {
2336 exceptions[i] = table[i].class_cp_index;
2337 }
2338 }
2339 JVM_END
2340
2341
2342 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2343 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2344 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2345 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2346 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2347 return method->checked_exceptions_length();
2348 JVM_END
2349
2350
2351 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2352 JVMWrapper("JVM_GetMethodIxByteCode");
2353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2354 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2355 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2356 memcpy(code, method->code_base(), method->code_size());
2357 JVM_END
2358
2359
2360 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2361 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2365 return method->code_size();
2366 JVM_END
2367
2368
2369 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2370 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2374 ExceptionTable extable(method);
2375 entry->start_pc = extable.start_pc(entry_index);
2376 entry->end_pc = extable.end_pc(entry_index);
2377 entry->handler_pc = extable.handler_pc(entry_index);
2378 entry->catchType = extable.catch_type_index(entry_index);
2379 JVM_END
2380
2381
2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2383 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2387 return method->exception_table_length();
2388 JVM_END
2389
2390
2391 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2392 JVMWrapper("JVM_GetMethodIxModifiers");
2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2395 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2396 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2397 JVM_END
2398
2399
2400 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2401 JVMWrapper("JVM_GetFieldIxModifiers");
2402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2404 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2405 JVM_END
2406
2407
2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2409 JVMWrapper("JVM_GetMethodIxLocalsCount");
2410 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2413 return method->max_locals();
2414 JVM_END
2415
2416
2417 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2418 JVMWrapper("JVM_GetMethodIxArgsSize");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2422 return method->size_of_parameters();
2423 JVM_END
2424
2425
2426 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2427 JVMWrapper("JVM_GetMethodIxMaxStack");
2428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2429 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2430 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2431 return method->verifier_max_stack();
2432 JVM_END
2433
2434
2435 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2436 JVMWrapper("JVM_IsConstructorIx");
2437 ResourceMark rm(THREAD);
2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2440 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2441 return method->name() == vmSymbols::object_initializer_name();
2442 JVM_END
2443
2444
2445 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2446 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2447 ResourceMark rm(THREAD);
2448 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2449 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2450 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2451 return method->is_overpass();
2452 JVM_END
2453
2454 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2455 JVMWrapper("JVM_GetMethodIxIxUTF");
2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2459 return method->name()->as_utf8();
2460 JVM_END
2461
2462
2463 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2464 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->signature()->as_utf8();
2469 JVM_END
2470
2471 /**
2472 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2473 * read entries in the constant pool. Since the old verifier always
2474 * works on a copy of the code, it will not see any rewriting that
2475 * may possibly occur in the middle of verification. So it is important
2476 * that nothing it calls tries to use the cpCache instead of the raw
2477 * constant pool, so we must use cp->uncached_x methods when appropriate.
2478 */
2479 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2480 JVMWrapper("JVM_GetCPFieldNameUTF");
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2484 switch (cp->tag_at(cp_index).value()) {
2485 case JVM_CONSTANT_Fieldref:
2486 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2487 default:
2488 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2489 }
2490 ShouldNotReachHere();
2491 return NULL;
2492 JVM_END
2493
2494
2495 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2496 JVMWrapper("JVM_GetCPMethodNameUTF");
2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2500 switch (cp->tag_at(cp_index).value()) {
2501 case JVM_CONSTANT_InterfaceMethodref:
2502 case JVM_CONSTANT_Methodref:
2503 case JVM_CONSTANT_NameAndType: // for invokedynamic
2504 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2505 default:
2506 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2507 }
2508 ShouldNotReachHere();
2509 return NULL;
2510 JVM_END
2511
2512
2513 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2514 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2517 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2518 switch (cp->tag_at(cp_index).value()) {
2519 case JVM_CONSTANT_InterfaceMethodref:
2520 case JVM_CONSTANT_Methodref:
2521 case JVM_CONSTANT_NameAndType: // for invokedynamic
2522 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2523 default:
2524 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2525 }
2526 ShouldNotReachHere();
2527 return NULL;
2528 JVM_END
2529
2530
2531 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2532 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2533 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2534 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2535 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2536 switch (cp->tag_at(cp_index).value()) {
2537 case JVM_CONSTANT_Fieldref:
2538 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2539 default:
2540 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2541 }
2542 ShouldNotReachHere();
2543 return NULL;
2544 JVM_END
2545
2546
2547 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2548 JVMWrapper("JVM_GetCPClassNameUTF");
2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2551 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2552 Symbol* classname = cp->klass_name_at(cp_index);
2553 return classname->as_utf8();
2554 JVM_END
2555
2556
2557 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2558 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2559 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2560 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2561 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2562 switch (cp->tag_at(cp_index).value()) {
2563 case JVM_CONSTANT_Fieldref: {
2564 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2565 Symbol* classname = cp->klass_name_at(class_index);
2566 return classname->as_utf8();
2567 }
2568 default:
2569 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2570 }
2571 ShouldNotReachHere();
2572 return NULL;
2573 JVM_END
2574
2575
2576 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2577 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2581 switch (cp->tag_at(cp_index).value()) {
2582 case JVM_CONSTANT_Methodref:
2583 case JVM_CONSTANT_InterfaceMethodref: {
2584 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2585 Symbol* classname = cp->klass_name_at(class_index);
2586 return classname->as_utf8();
2587 }
2588 default:
2589 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2590 }
2591 ShouldNotReachHere();
2592 return NULL;
2593 JVM_END
2594
2595
2596 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2597 JVMWrapper("JVM_GetCPFieldModifiers");
2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2600 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2601 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2602 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2603 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2604 switch (cp->tag_at(cp_index).value()) {
2605 case JVM_CONSTANT_Fieldref: {
2606 Symbol* name = cp->uncached_name_ref_at(cp_index);
2607 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2608 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2609 if (fs.name() == name && fs.signature() == signature) {
2610 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2611 }
2612 }
2613 return -1;
2614 }
2615 default:
2616 fatal("JVM_GetCPFieldModifiers: illegal constant");
2617 }
2618 ShouldNotReachHere();
2619 return 0;
2620 JVM_END
2621
2622
2623 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2624 JVMWrapper("JVM_GetCPMethodModifiers");
2625 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2626 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2627 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2628 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2629 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2630 switch (cp->tag_at(cp_index).value()) {
2631 case JVM_CONSTANT_Methodref:
2632 case JVM_CONSTANT_InterfaceMethodref: {
2633 Symbol* name = cp->uncached_name_ref_at(cp_index);
2634 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2635 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2636 int methods_count = methods->length();
2637 for (int i = 0; i < methods_count; i++) {
2638 Method* method = methods->at(i);
2639 if (method->name() == name && method->signature() == signature) {
2640 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2641 }
2642 }
2643 return -1;
2644 }
2645 default:
2646 fatal("JVM_GetCPMethodModifiers: illegal constant");
2647 }
2648 ShouldNotReachHere();
2649 return 0;
2650 JVM_END
2651
2652
2653 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2654
2655 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2656 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2657 JVM_END
2658
2659
2660 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2661 JVMWrapper("JVM_IsSameClassPackage");
2662 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2663 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2664 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2665 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2666 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2667 JVM_END
2668
2669
2670 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2671
2672 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2673 JVMWrapper2("JVM_Open (%s)", fname);
2674
2675 //%note jvm_r6
2676 int result = os::open(fname, flags, mode);
2677 if (result >= 0) {
2678 return result;
2679 } else {
2680 switch(errno) {
2681 case EEXIST:
2682 return JVM_EEXIST;
2683 default:
2684 return -1;
2685 }
2686 }
2687 JVM_END
2688
2689
2690 JVM_LEAF(jint, JVM_Close(jint fd))
2691 JVMWrapper2("JVM_Close (0x%x)", fd);
2692 //%note jvm_r6
2693 return os::close(fd);
2694 JVM_END
2695
2696
2697 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2698 JVMWrapper2("JVM_Read (0x%x)", fd);
2699
2700 //%note jvm_r6
2701 return (jint)os::restartable_read(fd, buf, nbytes);
2702 JVM_END
2703
2704
2705 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2706 JVMWrapper2("JVM_Write (0x%x)", fd);
2707
2708 //%note jvm_r6
2709 return (jint)os::write(fd, buf, nbytes);
2710 JVM_END
2711
2712
2713 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2714 JVMWrapper2("JVM_Available (0x%x)", fd);
2715 //%note jvm_r6
2716 return os::available(fd, pbytes);
2717 JVM_END
2718
2719
2720 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2721 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2722 //%note jvm_r6
2723 return os::lseek(fd, offset, whence);
2724 JVM_END
2725
2726
2727 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2728 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2729 return os::ftruncate(fd, length);
2730 JVM_END
2731
2732
2733 JVM_LEAF(jint, JVM_Sync(jint fd))
2734 JVMWrapper2("JVM_Sync (0x%x)", fd);
2735 //%note jvm_r6
2736 return os::fsync(fd);
2737 JVM_END
2738
2739
2740 // Printing support //////////////////////////////////////////////////
2741 extern "C" {
2742
2743 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2744 // see bug 4399518, 4417214
2745 if ((intptr_t)count <= 0) return -1;
2746 return vsnprintf(str, count, fmt, args);
2747 }
2748
2749
2750 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2751 va_list args;
2752 int len;
2753 va_start(args, fmt);
2754 len = jio_vsnprintf(str, count, fmt, args);
2755 va_end(args);
2756 return len;
2757 }
2758
2759
2760 int jio_fprintf(FILE* f, const char *fmt, ...) {
2761 int len;
2762 va_list args;
2763 va_start(args, fmt);
2764 len = jio_vfprintf(f, fmt, args);
2765 va_end(args);
2766 return len;
2767 }
2768
2769
2770 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2771 if (Arguments::vfprintf_hook() != NULL) {
2772 return Arguments::vfprintf_hook()(f, fmt, args);
2773 } else {
2774 return vfprintf(f, fmt, args);
2775 }
2776 }
2777
2778
2779 JNIEXPORT int jio_printf(const char *fmt, ...) {
2780 int len;
2781 va_list args;
2782 va_start(args, fmt);
2783 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2784 va_end(args);
2785 return len;
2786 }
2787
2788
2789 // HotSpot specific jio method
2790 void jio_print(const char* s) {
2791 // Try to make this function as atomic as possible.
2792 if (Arguments::vfprintf_hook() != NULL) {
2793 jio_fprintf(defaultStream::output_stream(), "%s", s);
2794 } else {
2795 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2796 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2797 }
2798 }
2799
2800 } // Extern C
2801
2802 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2803
2804 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2805 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2806 // OSThread objects. The exception to this rule is when the target object is the thread
2807 // doing the operation, in which case we know that the thread won't exit until the
2808 // operation is done (all exits being voluntary). There are a few cases where it is
2809 // rather silly to do operations on yourself, like resuming yourself or asking whether
2810 // you are alive. While these can still happen, they are not subject to deadlocks if
2811 // the lock is held while the operation occurs (this is not the case for suspend, for
2812 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2813 // implementation is local to this file, we always lock Threads_lock for that one.
2814
2815 static void thread_entry(JavaThread* thread, TRAPS) {
2816 HandleMark hm(THREAD);
2817 Handle obj(THREAD, thread->threadObj());
2818 JavaValue result(T_VOID);
2819 JavaCalls::call_virtual(&result,
2820 obj,
2821 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2822 vmSymbols::run_method_name(),
2823 vmSymbols::void_method_signature(),
2824 THREAD);
2825 }
2826
2827
2828 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2829 JVMWrapper("JVM_StartThread");
2830 JavaThread *native_thread = NULL;
2831
2832 // We cannot hold the Threads_lock when we throw an exception,
2833 // due to rank ordering issues. Example: we might need to grab the
2834 // Heap_lock while we construct the exception.
2835 bool throw_illegal_thread_state = false;
2836
2837 // We must release the Threads_lock before we can post a jvmti event
2838 // in Thread::start.
2839 {
2840 // Ensure that the C++ Thread and OSThread structures aren't freed before
2841 // we operate.
2842 MutexLocker mu(Threads_lock);
2843
2844 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2845 // re-starting an already started thread, so we should usually find
2846 // that the JavaThread is null. However for a JNI attached thread
2847 // there is a small window between the Thread object being created
2848 // (with its JavaThread set) and the update to its threadStatus, so we
2849 // have to check for this
2850 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2851 throw_illegal_thread_state = true;
2852 } else {
2853 // We could also check the stillborn flag to see if this thread was already stopped, but
2854 // for historical reasons we let the thread detect that itself when it starts running
2855
2856 jlong size =
2857 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2858 // Allocate the C++ Thread structure and create the native thread. The
2859 // stack size retrieved from java is signed, but the constructor takes
2860 // size_t (an unsigned type), so avoid passing negative values which would
2861 // result in really large stacks.
2862 size_t sz = size > 0 ? (size_t) size : 0;
2863 native_thread = new JavaThread(&thread_entry, sz);
2864
2865 // At this point it may be possible that no osthread was created for the
2866 // JavaThread due to lack of memory. Check for this situation and throw
2867 // an exception if necessary. Eventually we may want to change this so
2868 // that we only grab the lock if the thread was created successfully -
2869 // then we can also do this check and throw the exception in the
2870 // JavaThread constructor.
2871 if (native_thread->osthread() != NULL) {
2872 // Note: the current thread is not being used within "prepare".
2873 native_thread->prepare(jthread);
2874 }
2875 }
2876 }
2877
2878 if (throw_illegal_thread_state) {
2879 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2880 }
2881
2882 assert(native_thread != NULL, "Starting null thread?");
2883
2884 if (native_thread->osthread() == NULL) {
2885 // No one should hold a reference to the 'native_thread'.
2886 delete native_thread;
2887 if (JvmtiExport::should_post_resource_exhausted()) {
2888 JvmtiExport::post_resource_exhausted(
2889 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2890 os::native_thread_creation_failed_msg());
2891 }
2892 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2893 os::native_thread_creation_failed_msg());
2894 }
2895
2896 Thread::start(native_thread);
2897
2898 JVM_END
2899
2900 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2901 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2902 // but is thought to be reliable and simple. In the case, where the receiver is the
2903 // same thread as the sender, no safepoint is needed.
2904 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2905 JVMWrapper("JVM_StopThread");
2906
2907 oop java_throwable = JNIHandles::resolve(throwable);
2908 if (java_throwable == NULL) {
2909 THROW(vmSymbols::java_lang_NullPointerException());
2910 }
2911 oop java_thread = JNIHandles::resolve_non_null(jthread);
2912 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2913 Events::log_exception(JavaThread::current(),
2914 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2915 receiver, (address)java_thread, throwable);
2916 // First check if thread is alive
2917 if (receiver != NULL) {
2918 // Check if exception is getting thrown at self (use oop equality, since the
2919 // target object might exit)
2920 if (java_thread == thread->threadObj()) {
2921 THROW_OOP(java_throwable);
2922 } else {
2923 // Enques a VM_Operation to stop all threads and then deliver the exception...
2924 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2925 }
2926 }
2927 else {
2928 // Either:
2929 // - target thread has not been started before being stopped, or
2930 // - target thread already terminated
2931 // We could read the threadStatus to determine which case it is
2932 // but that is overkill as it doesn't matter. We must set the
2933 // stillborn flag for the first case, and if the thread has already
2934 // exited setting this flag has no affect
2935 java_lang_Thread::set_stillborn(java_thread);
2936 }
2937 JVM_END
2938
2939
2940 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2941 JVMWrapper("JVM_IsThreadAlive");
2942
2943 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2944 return java_lang_Thread::is_alive(thread_oop);
2945 JVM_END
2946
2947
2948 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2949 JVMWrapper("JVM_SuspendThread");
2950 oop java_thread = JNIHandles::resolve_non_null(jthread);
2951 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2952
2953 if (receiver != NULL) {
2954 // thread has run and has not exited (still on threads list)
2955
2956 {
2957 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2958 if (receiver->is_external_suspend()) {
2959 // Don't allow nested external suspend requests. We can't return
2960 // an error from this interface so just ignore the problem.
2961 return;
2962 }
2963 if (receiver->is_exiting()) { // thread is in the process of exiting
2964 return;
2965 }
2966 receiver->set_external_suspend();
2967 }
2968
2969 // java_suspend() will catch threads in the process of exiting
2970 // and will ignore them.
2971 receiver->java_suspend();
2972
2973 // It would be nice to have the following assertion in all the
2974 // time, but it is possible for a racing resume request to have
2975 // resumed this thread right after we suspended it. Temporarily
2976 // enable this assertion if you are chasing a different kind of
2977 // bug.
2978 //
2979 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2980 // receiver->is_being_ext_suspended(), "thread is not suspended");
2981 }
2982 JVM_END
2983
2984
2985 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2986 JVMWrapper("JVM_ResumeThread");
2987 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2988 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2989 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2990 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2991 // looks at it.
2992 MutexLocker ml(Threads_lock);
2993 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2994 if (thr != NULL) {
2995 // the thread has run and is not in the process of exiting
2996 thr->java_resume();
2997 }
2998 JVM_END
2999
3000
3001 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3002 JVMWrapper("JVM_SetThreadPriority");
3003 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3004 MutexLocker ml(Threads_lock);
3005 oop java_thread = JNIHandles::resolve_non_null(jthread);
3006 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3007 JavaThread* thr = java_lang_Thread::thread(java_thread);
3008 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3009 Thread::set_priority(thr, (ThreadPriority)prio);
3010 }
3011 JVM_END
3012
3013
3014 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3015 JVMWrapper("JVM_Yield");
3016 if (os::dont_yield()) return;
3017 HOTSPOT_THREAD_YIELD();
3018
3019 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3020 // Critical for similar threading behaviour
3021 if (ConvertYieldToSleep) {
3022 os::sleep(thread, MinSleepInterval, false);
3023 } else {
3024 os::yield();
3025 }
3026 JVM_END
3027
3028
3029 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3030 JVMWrapper("JVM_Sleep");
3031
3032 if (millis < 0) {
3033 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3034 }
3035
3036 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3037 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3038 }
3039
3040 // Save current thread state and restore it at the end of this block.
3041 // And set new thread state to SLEEPING.
3042 JavaThreadSleepState jtss(thread);
3043
3044 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3045
3046 EventThreadSleep event;
3047
3048 if (millis == 0) {
3049 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3050 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3051 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3052 // for SOLARIS
3053 if (ConvertSleepToYield) {
3054 os::yield();
3055 } else {
3056 ThreadState old_state = thread->osthread()->get_state();
3057 thread->osthread()->set_state(SLEEPING);
3058 os::sleep(thread, MinSleepInterval, false);
3059 thread->osthread()->set_state(old_state);
3060 }
3061 } else {
3062 ThreadState old_state = thread->osthread()->get_state();
3063 thread->osthread()->set_state(SLEEPING);
3064 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3065 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3066 // us while we were sleeping. We do not overwrite those.
3067 if (!HAS_PENDING_EXCEPTION) {
3068 if (event.should_commit()) {
3069 event.set_time(millis);
3070 event.commit();
3071 }
3072 HOTSPOT_THREAD_SLEEP_END(1);
3073
3074 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3075 // to properly restore the thread state. That's likely wrong.
3076 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3077 }
3078 }
3079 thread->osthread()->set_state(old_state);
3080 }
3081 if (event.should_commit()) {
3082 event.set_time(millis);
3083 event.commit();
3084 }
3085 HOTSPOT_THREAD_SLEEP_END(0);
3086 JVM_END
3087
3088 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3089 JVMWrapper("JVM_CurrentThread");
3090 oop jthread = thread->threadObj();
3091 assert (thread != NULL, "no current thread!");
3092 return JNIHandles::make_local(env, jthread);
3093 JVM_END
3094
3095
3096 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3097 JVMWrapper("JVM_CountStackFrames");
3098
3099 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3100 oop java_thread = JNIHandles::resolve_non_null(jthread);
3101 bool throw_illegal_thread_state = false;
3102 int count = 0;
3103
3104 {
3105 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3106 // We need to re-resolve the java_thread, since a GC might have happened during the
3107 // acquire of the lock
3108 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3109
3110 if (thr == NULL) {
3111 // do nothing
3112 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3113 // Check whether this java thread has been suspended already. If not, throws
3114 // IllegalThreadStateException. We defer to throw that exception until
3115 // Threads_lock is released since loading exception class has to leave VM.
3116 // The correct way to test a thread is actually suspended is
3117 // wait_for_ext_suspend_completion(), but we can't call that while holding
3118 // the Threads_lock. The above tests are sufficient for our purposes
3119 // provided the walkability of the stack is stable - which it isn't
3120 // 100% but close enough for most practical purposes.
3121 throw_illegal_thread_state = true;
3122 } else {
3123 // Count all java activation, i.e., number of vframes
3124 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3125 // Native frames are not counted
3126 if (!vfst.method()->is_native()) count++;
3127 }
3128 }
3129 }
3130
3131 if (throw_illegal_thread_state) {
3132 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3133 "this thread is not suspended");
3134 }
3135 return count;
3136 JVM_END
3137
3138 // Consider: A better way to implement JVM_Interrupt() is to acquire
3139 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3140 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3141 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3142 // outside the critical section. Threads_lock is hot so we want to minimize
3143 // the hold-time. A cleaner interface would be to decompose interrupt into
3144 // two steps. The 1st phase, performed under Threads_lock, would return
3145 // a closure that'd be invoked after Threads_lock was dropped.
3146 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3147 // admit spurious wakeups.
3148
3149 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3150 JVMWrapper("JVM_Interrupt");
3151
3152 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3153 oop java_thread = JNIHandles::resolve_non_null(jthread);
3154 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3155 // We need to re-resolve the java_thread, since a GC might have happened during the
3156 // acquire of the lock
3157 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3158 if (thr != NULL) {
3159 Thread::interrupt(thr);
3160 }
3161 JVM_END
3162
3163
3164 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3165 JVMWrapper("JVM_IsInterrupted");
3166
3167 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3168 oop java_thread = JNIHandles::resolve_non_null(jthread);
3169 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3170 // We need to re-resolve the java_thread, since a GC might have happened during the
3171 // acquire of the lock
3172 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3173 if (thr == NULL) {
3174 return JNI_FALSE;
3175 } else {
3176 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3177 }
3178 JVM_END
3179
3180
3181 // Return true iff the current thread has locked the object passed in
3182
3183 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3184 JVMWrapper("JVM_HoldsLock");
3185 assert(THREAD->is_Java_thread(), "sanity check");
3186 if (obj == NULL) {
3187 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3188 }
3189 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3190 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3191 JVM_END
3192
3193
3194 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3195 JVMWrapper("JVM_DumpAllStacks");
3196 VM_PrintThreads op;
3197 VMThread::execute(&op);
3198 if (JvmtiExport::should_post_data_dump()) {
3199 JvmtiExport::post_data_dump();
3200 }
3201 JVM_END
3202
3203 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3204 JVMWrapper("JVM_SetNativeThreadName");
3205 ResourceMark rm(THREAD);
3206 oop java_thread = JNIHandles::resolve_non_null(jthread);
3207 JavaThread* thr = java_lang_Thread::thread(java_thread);
3208 // Thread naming only supported for the current thread, doesn't work for
3209 // target threads.
3210 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3211 // we don't set the name of an attached thread to avoid stepping
3212 // on other programs
3213 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3214 os::set_native_thread_name(thread_name);
3215 }
3216 JVM_END
3217
3218 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3219
3220 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3221 assert(jthread->is_Java_thread(), "must be a Java thread");
3222 if (jthread->privileged_stack_top() == NULL) return false;
3223 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3224 oop loader = jthread->privileged_stack_top()->class_loader();
3225 if (loader == NULL) return true;
3226 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3227 if (trusted) return true;
3228 }
3229 return false;
3230 }
3231
3232 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3233 JVMWrapper("JVM_CurrentLoadedClass");
3234 ResourceMark rm(THREAD);
3235
3236 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3237 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3238 bool trusted = is_trusted_frame(thread, &vfst);
3239 if (trusted) return NULL;
3240
3241 Method* m = vfst.method();
3242 if (!m->is_native()) {
3243 InstanceKlass* holder = m->method_holder();
3244 oop loader = holder->class_loader();
3245 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3246 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3247 }
3248 }
3249 }
3250 return NULL;
3251 JVM_END
3252
3253
3254 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3255 JVMWrapper("JVM_CurrentClassLoader");
3256 ResourceMark rm(THREAD);
3257
3258 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3259
3260 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3261 bool trusted = is_trusted_frame(thread, &vfst);
3262 if (trusted) return NULL;
3263
3264 Method* m = vfst.method();
3265 if (!m->is_native()) {
3266 InstanceKlass* holder = m->method_holder();
3267 assert(holder->is_klass(), "just checking");
3268 oop loader = holder->class_loader();
3269 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3270 return JNIHandles::make_local(env, loader);
3271 }
3272 }
3273 }
3274 return NULL;
3275 JVM_END
3276
3277
3278 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3279 JVMWrapper("JVM_GetClassContext");
3280 ResourceMark rm(THREAD);
3281 JvmtiVMObjectAllocEventCollector oam;
3282 vframeStream vfst(thread);
3283
3284 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3285 // This must only be called from SecurityManager.getClassContext
3286 Method* m = vfst.method();
3287 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3288 m->name() == vmSymbols::getClassContext_name() &&
3289 m->signature() == vmSymbols::void_class_array_signature())) {
3290 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3291 }
3292 }
3293
3294 // Collect method holders
3295 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3296 for (; !vfst.at_end(); vfst.security_next()) {
3297 Method* m = vfst.method();
3298 // Native frames are not returned
3299 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3300 Klass* holder = m->method_holder();
3301 assert(holder->is_klass(), "just checking");
3302 klass_array->append(holder);
3303 }
3304 }
3305
3306 // Create result array of type [Ljava/lang/Class;
3307 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3308 // Fill in mirrors corresponding to method holders
3309 for (int i = 0; i < klass_array->length(); i++) {
3310 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3311 }
3312
3313 return (jobjectArray) JNIHandles::make_local(env, result);
3314 JVM_END
3315
3316
3317 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3318 JVMWrapper("JVM_ClassDepth");
3319 ResourceMark rm(THREAD);
3320 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3321 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3322
3323 const char* str = java_lang_String::as_utf8_string(class_name_str());
3324 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3325 if (class_name_sym == NULL) {
3326 return -1;
3327 }
3328
3329 int depth = 0;
3330
3331 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3332 if (!vfst.method()->is_native()) {
3333 InstanceKlass* holder = vfst.method()->method_holder();
3334 assert(holder->is_klass(), "just checking");
3335 if (holder->name() == class_name_sym) {
3336 return depth;
3337 }
3338 depth++;
3339 }
3340 }
3341 return -1;
3342 JVM_END
3343
3344
3345 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3346 JVMWrapper("JVM_ClassLoaderDepth");
3347 ResourceMark rm(THREAD);
3348 int depth = 0;
3349 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3350 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3351 bool trusted = is_trusted_frame(thread, &vfst);
3352 if (trusted) return -1;
3353
3354 Method* m = vfst.method();
3355 if (!m->is_native()) {
3356 InstanceKlass* holder = m->method_holder();
3357 assert(holder->is_klass(), "just checking");
3358 oop loader = holder->class_loader();
3359 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3360 return depth;
3361 }
3362 depth++;
3363 }
3364 }
3365 return -1;
3366 JVM_END
3367
3368
3369 // java.lang.Package ////////////////////////////////////////////////////////////////
3370
3371
3372 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3373 JVMWrapper("JVM_GetSystemPackage");
3374 ResourceMark rm(THREAD);
3375 JvmtiVMObjectAllocEventCollector oam;
3376 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3377 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3378 return (jstring) JNIHandles::make_local(result);
3379 JVM_END
3380
3381
3382 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3383 JVMWrapper("JVM_GetSystemPackages");
3384 JvmtiVMObjectAllocEventCollector oam;
3385 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3386 return (jobjectArray) JNIHandles::make_local(result);
3387 JVM_END
3388
3389
3390 // ObjectInputStream ///////////////////////////////////////////////////////////////
3391
3392 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3393 if (current_class == NULL) {
3394 return true;
3395 }
3396 if ((current_class == field_class) || access.is_public()) {
3397 return true;
3398 }
3399
3400 if (access.is_protected()) {
3401 // See if current_class is a subclass of field_class
3402 if (current_class->is_subclass_of(field_class)) {
3403 return true;
3404 }
3405 }
3406
3407 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3408 }
3409
3410
3411 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3412 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3413 JVMWrapper("JVM_AllocateNewObject");
3414 JvmtiVMObjectAllocEventCollector oam;
3415 // Receiver is not used
3416 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3417 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3418
3419 // Cannot instantiate primitive types
3420 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3421 ResourceMark rm(THREAD);
3422 THROW_0(vmSymbols::java_lang_InvalidClassException());
3423 }
3424
3425 // Arrays not allowed here, must use JVM_AllocateNewArray
3426 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3427 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3428 ResourceMark rm(THREAD);
3429 THROW_0(vmSymbols::java_lang_InvalidClassException());
3430 }
3431
3432 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3433 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3434
3435 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3436
3437 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3438 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3439
3440 // Make sure klass is initialized, since we are about to instantiate one of them.
3441 curr_klass->initialize(CHECK_NULL);
3442
3443 methodHandle m (THREAD,
3444 init_klass->find_method(vmSymbols::object_initializer_name(),
3445 vmSymbols::void_method_signature()));
3446 if (m.is_null()) {
3447 ResourceMark rm(THREAD);
3448 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3449 Method::name_and_sig_as_C_string(init_klass(),
3450 vmSymbols::object_initializer_name(),
3451 vmSymbols::void_method_signature()));
3452 }
3453
3454 if (curr_klass == init_klass && !m->is_public()) {
3455 // Calling the constructor for class 'curr_klass'.
3456 // Only allow calls to a public no-arg constructor.
3457 // This path corresponds to creating an Externalizable object.
3458 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3459 }
3460
3461 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3462 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3463 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3464 }
3465
3466 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3467 // Call constructor m. This might call a constructor higher up in the hierachy
3468 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3469
3470 return JNIHandles::make_local(obj());
3471 JVM_END
3472
3473
3474 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3475 JVMWrapper("JVM_AllocateNewArray");
3476 JvmtiVMObjectAllocEventCollector oam;
3477 oop mirror = JNIHandles::resolve_non_null(currClass);
3478
3479 if (java_lang_Class::is_primitive(mirror)) {
3480 THROW_0(vmSymbols::java_lang_InvalidClassException());
3481 }
3482 Klass* k = java_lang_Class::as_Klass(mirror);
3483 oop result;
3484
3485 if (k->oop_is_typeArray()) {
3486 // typeArray
3487 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3488 } else if (k->oop_is_objArray()) {
3489 // objArray
3490 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3491 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3492 result = oak->allocate(length, CHECK_NULL);
3493 } else {
3494 THROW_0(vmSymbols::java_lang_InvalidClassException());
3495 }
3496 return JNIHandles::make_local(env, result);
3497 JVM_END
3498
3499
3500 // Return the first non-null class loader up the execution stack, or null
3501 // if only code from the null class loader is on the stack.
3502
3503 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3504 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3505 // UseNewReflection
3506 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3507 oop loader = vfst.method()->method_holder()->class_loader();
3508 if (loader != NULL) {
3509 return JNIHandles::make_local(env, loader);
3510 }
3511 }
3512 return NULL;
3513 JVM_END
3514
3515
3516 // Load a class relative to the most recent class on the stack with a non-null
3517 // classloader.
3518 // This function has been deprecated and should not be considered part of the
3519 // specified JVM interface.
3520
3521 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3522 jclass currClass, jstring currClassName))
3523 JVMWrapper("JVM_LoadClass0");
3524 // Receiver is not used
3525 ResourceMark rm(THREAD);
3526
3527 // Class name argument is not guaranteed to be in internal format
3528 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3529 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3530
3531 const char* str = java_lang_String::as_utf8_string(string());
3532
3533 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3534 // It's impossible to create this class; the name cannot fit
3535 // into the constant pool.
3536 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3537 }
3538
3539 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3540 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3541 // Find the most recent class on the stack with a non-null classloader
3542 oop loader = NULL;
3543 oop protection_domain = NULL;
3544 if (curr_klass.is_null()) {
3545 for (vframeStream vfst(thread);
3546 !vfst.at_end() && loader == NULL;
3547 vfst.next()) {
3548 if (!vfst.method()->is_native()) {
3549 InstanceKlass* holder = vfst.method()->method_holder();
3550 loader = holder->class_loader();
3551 protection_domain = holder->protection_domain();
3552 }
3553 }
3554 } else {
3555 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3556 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3557 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3558 }
3559 Handle h_loader(THREAD, loader);
3560 Handle h_prot (THREAD, protection_domain);
3561 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3562 false, thread);
3563 if (TraceClassResolution && result != NULL) {
3564 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3565 }
3566 return result;
3567 JVM_END
3568
3569
3570 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3571
3572
3573 // resolve array handle and check arguments
3574 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3575 if (arr == NULL) {
3576 THROW_0(vmSymbols::java_lang_NullPointerException());
3577 }
3578 oop a = JNIHandles::resolve_non_null(arr);
3579 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3580 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3581 }
3582 return arrayOop(a);
3583 }
3584
3585
3586 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3587 JVMWrapper("JVM_GetArrayLength");
3588 arrayOop a = check_array(env, arr, false, CHECK_0);
3589 return a->length();
3590 JVM_END
3591
3592
3593 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3594 JVMWrapper("JVM_Array_Get");
3595 JvmtiVMObjectAllocEventCollector oam;
3596 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3597 jvalue value;
3598 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3599 oop box = Reflection::box(&value, type, CHECK_NULL);
3600 return JNIHandles::make_local(env, box);
3601 JVM_END
3602
3603
3604 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3605 JVMWrapper("JVM_GetPrimitiveArrayElement");
3606 jvalue value;
3607 value.i = 0; // to initialize value before getting used in CHECK
3608 arrayOop a = check_array(env, arr, true, CHECK_(value));
3609 assert(a->is_typeArray(), "just checking");
3610 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3611 BasicType wide_type = (BasicType) wCode;
3612 if (type != wide_type) {
3613 Reflection::widen(&value, type, wide_type, CHECK_(value));
3614 }
3615 return value;
3616 JVM_END
3617
3618
3619 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3620 JVMWrapper("JVM_SetArrayElement");
3621 arrayOop a = check_array(env, arr, false, CHECK);
3622 oop box = JNIHandles::resolve(val);
3623 jvalue value;
3624 value.i = 0; // to initialize value before getting used in CHECK
3625 BasicType value_type;
3626 if (a->is_objArray()) {
3627 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3628 value_type = Reflection::unbox_for_regular_object(box, &value);
3629 } else {
3630 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3631 }
3632 Reflection::array_set(&value, a, index, value_type, CHECK);
3633 JVM_END
3634
3635
3636 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3637 JVMWrapper("JVM_SetPrimitiveArrayElement");
3638 arrayOop a = check_array(env, arr, true, CHECK);
3639 assert(a->is_typeArray(), "just checking");
3640 BasicType value_type = (BasicType) vCode;
3641 Reflection::array_set(&v, a, index, value_type, CHECK);
3642 JVM_END
3643
3644
3645 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3646 JVMWrapper("JVM_NewArray");
3647 JvmtiVMObjectAllocEventCollector oam;
3648 oop element_mirror = JNIHandles::resolve(eltClass);
3649 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3650 return JNIHandles::make_local(env, result);
3651 JVM_END
3652
3653
3654 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3655 JVMWrapper("JVM_NewMultiArray");
3656 JvmtiVMObjectAllocEventCollector oam;
3657 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3658 oop element_mirror = JNIHandles::resolve(eltClass);
3659 assert(dim_array->is_typeArray(), "just checking");
3660 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3661 return JNIHandles::make_local(env, result);
3662 JVM_END
3663
3664
3665 // Networking library support ////////////////////////////////////////////////////////////////////
3666
3667 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3668 JVMWrapper("JVM_InitializeSocketLibrary");
3669 return 0;
3670 JVM_END
3671
3672
3673 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3674 JVMWrapper("JVM_Socket");
3675 return os::socket(domain, type, protocol);
3676 JVM_END
3677
3678
3679 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3680 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3681 //%note jvm_r6
3682 return os::socket_close(fd);
3683 JVM_END
3684
3685
3686 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3687 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3688 //%note jvm_r6
3689 return os::socket_shutdown(fd, howto);
3690 JVM_END
3691
3692
3693 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3694 JVMWrapper2("JVM_Recv (0x%x)", fd);
3695 //%note jvm_r6
3696 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3697 JVM_END
3698
3699
3700 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3701 JVMWrapper2("JVM_Send (0x%x)", fd);
3702 //%note jvm_r6
3703 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3704 JVM_END
3705
3706
3707 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3708 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3709 //%note jvm_r6
3710 return os::timeout(fd, timeout);
3711 JVM_END
3712
3713
3714 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3715 JVMWrapper2("JVM_Listen (0x%x)", fd);
3716 //%note jvm_r6
3717 return os::listen(fd, count);
3718 JVM_END
3719
3720
3721 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3722 JVMWrapper2("JVM_Connect (0x%x)", fd);
3723 //%note jvm_r6
3724 return os::connect(fd, him, (socklen_t)len);
3725 JVM_END
3726
3727
3728 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3729 JVMWrapper2("JVM_Bind (0x%x)", fd);
3730 //%note jvm_r6
3731 return os::bind(fd, him, (socklen_t)len);
3732 JVM_END
3733
3734
3735 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3736 JVMWrapper2("JVM_Accept (0x%x)", fd);
3737 //%note jvm_r6
3738 socklen_t socklen = (socklen_t)(*len);
3739 jint result = os::accept(fd, him, &socklen);
3740 *len = (jint)socklen;
3741 return result;
3742 JVM_END
3743
3744
3745 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3746 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3747 //%note jvm_r6
3748 socklen_t socklen = (socklen_t)(*fromlen);
3749 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3750 *fromlen = (int)socklen;
3751 return result;
3752 JVM_END
3753
3754
3755 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3756 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3757 //%note jvm_r6
3758 socklen_t socklen = (socklen_t)(*len);
3759 jint result = os::get_sock_name(fd, him, &socklen);
3760 *len = (int)socklen;
3761 return result;
3762 JVM_END
3763
3764
3765 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3766 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3767 //%note jvm_r6
3768 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3769 JVM_END
3770
3771
3772 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3773 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3774 //%note jvm_r6
3775 return os::socket_available(fd, pbytes);
3776 JVM_END
3777
3778
3779 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3780 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3781 //%note jvm_r6
3782 socklen_t socklen = (socklen_t)(*optlen);
3783 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3784 *optlen = (int)socklen;
3785 return result;
3786 JVM_END
3787
3788
3789 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3790 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3791 //%note jvm_r6
3792 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3793 JVM_END
3794
3795
3796 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3797 JVMWrapper("JVM_GetHostName");
3798 return os::get_host_name(name, namelen);
3799 JVM_END
3800
3801
3802 // Library support ///////////////////////////////////////////////////////////////////////////
3803
3804 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3805 //%note jvm_ct
3806 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3807 char ebuf[1024];
3808 void *load_result;
3809 {
3810 ThreadToNativeFromVM ttnfvm(thread);
3811 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3812 }
3813 if (load_result == NULL) {
3814 char msg[1024];
3815 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3816 // Since 'ebuf' may contain a string encoded using
3817 // platform encoding scheme, we need to pass
3818 // Exceptions::unsafe_to_utf8 to the new_exception method
3819 // as the last argument. See bug 6367357.
3820 Handle h_exception =
3821 Exceptions::new_exception(thread,
3822 vmSymbols::java_lang_UnsatisfiedLinkError(),
3823 msg, Exceptions::unsafe_to_utf8);
3824
3825 THROW_HANDLE_0(h_exception);
3826 }
3827 return load_result;
3828 JVM_END
3829
3830
3831 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3832 JVMWrapper("JVM_UnloadLibrary");
3833 os::dll_unload(handle);
3834 JVM_END
3835
3836
3837 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3838 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3839 return os::dll_lookup(handle, name);
3840 JVM_END
3841
3842
3843 // Floating point support ////////////////////////////////////////////////////////////////////
3844
3845 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3846 JVMWrapper("JVM_IsNaN");
3847 return g_isnan(a);
3848 JVM_END
3849
3850
3851 // JNI version ///////////////////////////////////////////////////////////////////////////////
3852
3853 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3854 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3855 return Threads::is_supported_jni_version_including_1_1(version);
3856 JVM_END
3857
3858
3859 // String support ///////////////////////////////////////////////////////////////////////////
3860
3861 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3862 JVMWrapper("JVM_InternString");
3863 JvmtiVMObjectAllocEventCollector oam;
3864 if (str == NULL) return NULL;
3865 oop string = JNIHandles::resolve_non_null(str);
3866 oop result = StringTable::intern(string, CHECK_NULL);
3867 return (jstring) JNIHandles::make_local(env, result);
3868 JVM_END
3869
3870
3871 // Raw monitor support //////////////////////////////////////////////////////////////////////
3872
3873 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3874 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3875 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3876 // that only works with java threads.
3877
3878
3879 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3880 VM_Exit::block_if_vm_exited();
3881 JVMWrapper("JVM_RawMonitorCreate");
3882 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3883 }
3884
3885
3886 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3887 VM_Exit::block_if_vm_exited();
3888 JVMWrapper("JVM_RawMonitorDestroy");
3889 delete ((Mutex*) mon);
3890 }
3891
3892
3893 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3894 VM_Exit::block_if_vm_exited();
3895 JVMWrapper("JVM_RawMonitorEnter");
3896 ((Mutex*) mon)->jvm_raw_lock();
3897 return 0;
3898 }
3899
3900
3901 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3902 VM_Exit::block_if_vm_exited();
3903 JVMWrapper("JVM_RawMonitorExit");
3904 ((Mutex*) mon)->jvm_raw_unlock();
3905 }
3906
3907
3908 // Support for Serialization
3909
3910 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3911 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3912 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3913 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3914
3915 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3916 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3917 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3918 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3919
3920
3921 void initialize_converter_functions() {
3922 if (JDK_Version::is_gte_jdk14x_version()) {
3923 // These functions only exist for compatibility with 1.3.1 and earlier
3924 return;
3925 }
3926
3927 // called from universe_post_init()
3928 assert(
3929 int_bits_to_float_fn == NULL &&
3930 long_bits_to_double_fn == NULL &&
3931 float_to_int_bits_fn == NULL &&
3932 double_to_long_bits_fn == NULL ,
3933 "initialization done twice"
3934 );
3935 // initialize
3936 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3937 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3938 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3939 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3940 // verify
3941 assert(
3942 int_bits_to_float_fn != NULL &&
3943 long_bits_to_double_fn != NULL &&
3944 float_to_int_bits_fn != NULL &&
3945 double_to_long_bits_fn != NULL ,
3946 "initialization failed"
3947 );
3948 }
3949
3950
3951
3952 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3953
3954 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3955 // Security Note:
3956 // The Java level wrapper will perform the necessary security check allowing
3957 // us to pass the NULL as the initiating class loader.
3958 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3959
3960 KlassHandle klass_handle(THREAD, klass);
3961 // Check if we should initialize the class
3962 if (init && klass_handle->oop_is_instance()) {
3963 klass_handle->initialize(CHECK_NULL);
3964 }
3965 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3966 }
3967
3968
3969 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3970
3971 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3972 JVMWrapper("JVM_InvokeMethod");
3973 Handle method_handle;
3974 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3975 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3976 Handle receiver(THREAD, JNIHandles::resolve(obj));
3977 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3978 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3979 jobject res = JNIHandles::make_local(env, result);
3980 if (JvmtiExport::should_post_vm_object_alloc()) {
3981 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3982 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3983 if (java_lang_Class::is_primitive(ret_type)) {
3984 // Only for primitive type vm allocates memory for java object.
3985 // See box() method.
3986 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3987 }
3988 }
3989 return res;
3990 } else {
3991 THROW_0(vmSymbols::java_lang_StackOverflowError());
3992 }
3993 JVM_END
3994
3995
3996 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3997 JVMWrapper("JVM_NewInstanceFromConstructor");
3998 oop constructor_mirror = JNIHandles::resolve(c);
3999 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4000 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4001 jobject res = JNIHandles::make_local(env, result);
4002 if (JvmtiExport::should_post_vm_object_alloc()) {
4003 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4004 }
4005 return res;
4006 JVM_END
4007
4008 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4009
4010 JVM_LEAF(jboolean, JVM_SupportsCX8())
4011 JVMWrapper("JVM_SupportsCX8");
4012 return VM_Version::supports_cx8();
4013 JVM_END
4014
4015
4016 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4017 JVMWrapper("JVM_CX8Field");
4018 jlong res;
4019 oop o = JNIHandles::resolve(obj);
4020 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4021 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4022
4023 assert(VM_Version::supports_cx8(), "cx8 not supported");
4024 res = Atomic::cmpxchg(newVal, addr, oldVal);
4025
4026 return res == oldVal;
4027 JVM_END
4028
4029 // DTrace ///////////////////////////////////////////////////////////////////
4030
4031 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4032 JVMWrapper("JVM_DTraceGetVersion");
4033 return (jint)JVM_TRACING_DTRACE_VERSION;
4034 JVM_END
4035
4036 JVM_ENTRY(jlong,JVM_DTraceActivate(
4037 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4038 JVM_DTraceProvider* providers))
4039 JVMWrapper("JVM_DTraceActivate");
4040 return DTraceJSDT::activate(
4041 version, module_name, providers_count, providers, CHECK_0);
4042 JVM_END
4043
4044 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4045 JVMWrapper("JVM_DTraceIsProbeEnabled");
4046 return DTraceJSDT::is_probe_enabled(method);
4047 JVM_END
4048
4049 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4050 JVMWrapper("JVM_DTraceDispose");
4051 DTraceJSDT::dispose(handle);
4052 JVM_END
4053
4054 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4055 JVMWrapper("JVM_DTraceIsSupported");
4056 return DTraceJSDT::is_supported();
4057 JVM_END
4058
4059 // Returns an array of all live Thread objects (VM internal JavaThreads,
4060 // jvmti agent threads, and JNI attaching threads are skipped)
4061 // See CR 6404306 regarding JNI attaching threads
4062 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4063 ResourceMark rm(THREAD);
4064 ThreadsListEnumerator tle(THREAD, false, false);
4065 JvmtiVMObjectAllocEventCollector oam;
4066
4067 int num_threads = tle.num_threads();
4068 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4069 objArrayHandle threads_ah(THREAD, r);
4070
4071 for (int i = 0; i < num_threads; i++) {
4072 Handle h = tle.get_threadObj(i);
4073 threads_ah->obj_at_put(i, h());
4074 }
4075
4076 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4077 JVM_END
4078
4079
4080 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4081 // Return StackTraceElement[][], each element is the stack trace of a thread in
4082 // the corresponding entry in the given threads array
4083 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4084 JVMWrapper("JVM_DumpThreads");
4085 JvmtiVMObjectAllocEventCollector oam;
4086
4087 // Check if threads is null
4088 if (threads == NULL) {
4089 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4090 }
4091
4092 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4093 objArrayHandle ah(THREAD, a);
4094 int num_threads = ah->length();
4095 // check if threads is non-empty array
4096 if (num_threads == 0) {
4097 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4098 }
4099
4100 // check if threads is not an array of objects of Thread class
4101 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4102 if (k != SystemDictionary::Thread_klass()) {
4103 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4104 }
4105
4106 ResourceMark rm(THREAD);
4107
4108 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4109 for (int i = 0; i < num_threads; i++) {
4110 oop thread_obj = ah->obj_at(i);
4111 instanceHandle h(THREAD, (instanceOop) thread_obj);
4112 thread_handle_array->append(h);
4113 }
4114
4115 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4116 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4117
4118 JVM_END
4119
4120 // JVM monitoring and management support
4121 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4122 return Management::get_jmm_interface(version);
4123 JVM_END
4124
4125 // com.sun.tools.attach.VirtualMachine agent properties support
4126 //
4127 // Initialize the agent properties with the properties maintained in the VM
4128 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4129 JVMWrapper("JVM_InitAgentProperties");
4130 ResourceMark rm;
4131
4132 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4133
4134 PUTPROP(props, "sun.java.command", Arguments::java_command());
4135 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4136 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4137 return properties;
4138 JVM_END
4139
4140 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4141 {
4142 JVMWrapper("JVM_GetEnclosingMethodInfo");
4143 JvmtiVMObjectAllocEventCollector oam;
4144
4145 if (ofClass == NULL) {
4146 return NULL;
4147 }
4148 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4149 // Special handling for primitive objects
4150 if (java_lang_Class::is_primitive(mirror())) {
4151 return NULL;
4152 }
4153 Klass* k = java_lang_Class::as_Klass(mirror());
4154 if (!k->oop_is_instance()) {
4155 return NULL;
4156 }
4157 instanceKlassHandle ik_h(THREAD, k);
4158 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4159 if (encl_method_class_idx == 0) {
4160 return NULL;
4161 }
4162 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4163 objArrayHandle dest(THREAD, dest_o);
4164 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4165 dest->obj_at_put(0, enc_k->java_mirror());
4166 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4167 if (encl_method_method_idx != 0) {
4168 Symbol* sym = ik_h->constants()->symbol_at(
4169 extract_low_short_from_int(
4170 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4171 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4172 dest->obj_at_put(1, str());
4173 sym = ik_h->constants()->symbol_at(
4174 extract_high_short_from_int(
4175 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4176 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4177 dest->obj_at_put(2, str());
4178 }
4179 return (jobjectArray) JNIHandles::make_local(dest());
4180 }
4181 JVM_END
4182
4183 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4184 jint javaThreadState))
4185 {
4186 // If new thread states are added in future JDK and VM versions,
4187 // this should check if the JDK version is compatible with thread
4188 // states supported by the VM. Return NULL if not compatible.
4189 //
4190 // This function must map the VM java_lang_Thread::ThreadStatus
4191 // to the Java thread state that the JDK supports.
4192 //
4193
4194 typeArrayHandle values_h;
4195 switch (javaThreadState) {
4196 case JAVA_THREAD_STATE_NEW : {
4197 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4198 values_h = typeArrayHandle(THREAD, r);
4199 values_h->int_at_put(0, java_lang_Thread::NEW);
4200 break;
4201 }
4202 case JAVA_THREAD_STATE_RUNNABLE : {
4203 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4204 values_h = typeArrayHandle(THREAD, r);
4205 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4206 break;
4207 }
4208 case JAVA_THREAD_STATE_BLOCKED : {
4209 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4210 values_h = typeArrayHandle(THREAD, r);
4211 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4212 break;
4213 }
4214 case JAVA_THREAD_STATE_WAITING : {
4215 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4216 values_h = typeArrayHandle(THREAD, r);
4217 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4218 values_h->int_at_put(1, java_lang_Thread::PARKED);
4219 break;
4220 }
4221 case JAVA_THREAD_STATE_TIMED_WAITING : {
4222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4223 values_h = typeArrayHandle(THREAD, r);
4224 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4225 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4226 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4227 break;
4228 }
4229 case JAVA_THREAD_STATE_TERMINATED : {
4230 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4231 values_h = typeArrayHandle(THREAD, r);
4232 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4233 break;
4234 }
4235 default:
4236 // Unknown state - probably incompatible JDK version
4237 return NULL;
4238 }
4239
4240 return (jintArray) JNIHandles::make_local(env, values_h());
4241 }
4242 JVM_END
4243
4244
4245 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4246 jint javaThreadState,
4247 jintArray values))
4248 {
4249 // If new thread states are added in future JDK and VM versions,
4250 // this should check if the JDK version is compatible with thread
4251 // states supported by the VM. Return NULL if not compatible.
4252 //
4253 // This function must map the VM java_lang_Thread::ThreadStatus
4254 // to the Java thread state that the JDK supports.
4255 //
4256
4257 ResourceMark rm;
4258
4259 // Check if threads is null
4260 if (values == NULL) {
4261 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4262 }
4263
4264 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4265 typeArrayHandle values_h(THREAD, v);
4266
4267 objArrayHandle names_h;
4268 switch (javaThreadState) {
4269 case JAVA_THREAD_STATE_NEW : {
4270 assert(values_h->length() == 1 &&
4271 values_h->int_at(0) == java_lang_Thread::NEW,
4272 "Invalid threadStatus value");
4273
4274 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4275 1, /* only 1 substate */
4276 CHECK_NULL);
4277 names_h = objArrayHandle(THREAD, r);
4278 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4279 names_h->obj_at_put(0, name());
4280 break;
4281 }
4282 case JAVA_THREAD_STATE_RUNNABLE : {
4283 assert(values_h->length() == 1 &&
4284 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4285 "Invalid threadStatus value");
4286
4287 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4288 1, /* only 1 substate */
4289 CHECK_NULL);
4290 names_h = objArrayHandle(THREAD, r);
4291 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4292 names_h->obj_at_put(0, name());
4293 break;
4294 }
4295 case JAVA_THREAD_STATE_BLOCKED : {
4296 assert(values_h->length() == 1 &&
4297 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4298 "Invalid threadStatus value");
4299
4300 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4301 1, /* only 1 substate */
4302 CHECK_NULL);
4303 names_h = objArrayHandle(THREAD, r);
4304 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4305 names_h->obj_at_put(0, name());
4306 break;
4307 }
4308 case JAVA_THREAD_STATE_WAITING : {
4309 assert(values_h->length() == 2 &&
4310 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4311 values_h->int_at(1) == java_lang_Thread::PARKED,
4312 "Invalid threadStatus value");
4313 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4314 2, /* number of substates */
4315 CHECK_NULL);
4316 names_h = objArrayHandle(THREAD, r);
4317 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4318 CHECK_NULL);
4319 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4320 CHECK_NULL);
4321 names_h->obj_at_put(0, name0());
4322 names_h->obj_at_put(1, name1());
4323 break;
4324 }
4325 case JAVA_THREAD_STATE_TIMED_WAITING : {
4326 assert(values_h->length() == 3 &&
4327 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4328 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4329 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4330 "Invalid threadStatus value");
4331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4332 3, /* number of substates */
4333 CHECK_NULL);
4334 names_h = objArrayHandle(THREAD, r);
4335 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4336 CHECK_NULL);
4337 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4338 CHECK_NULL);
4339 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4340 CHECK_NULL);
4341 names_h->obj_at_put(0, name0());
4342 names_h->obj_at_put(1, name1());
4343 names_h->obj_at_put(2, name2());
4344 break;
4345 }
4346 case JAVA_THREAD_STATE_TERMINATED : {
4347 assert(values_h->length() == 1 &&
4348 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4349 "Invalid threadStatus value");
4350 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4351 1, /* only 1 substate */
4352 CHECK_NULL);
4353 names_h = objArrayHandle(THREAD, r);
4354 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4355 names_h->obj_at_put(0, name());
4356 break;
4357 }
4358 default:
4359 // Unknown state - probably incompatible JDK version
4360 return NULL;
4361 }
4362 return (jobjectArray) JNIHandles::make_local(env, names_h());
4363 }
4364 JVM_END
4365
4366 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4367 {
4368 memset(info, 0, info_size);
4369
4370 info->jvm_version = Abstract_VM_Version::jvm_version();
4371 info->update_version = 0; /* 0 in HotSpot Express VM */
4372 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4373
4374 // when we add a new capability in the jvm_version_info struct, we should also
4375 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4376 // counter defined in runtimeService.cpp.
4377 info->is_attachable = AttachListener::is_attach_supported();
4378 }
4379 JVM_END