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