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