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.inline.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 "runtime/vm_version.hpp"
63 #include "services/attachListener.hpp"
64 #include "services/management.hpp"
65 #include "services/threadService.hpp"
66 #include "trace/tracing.hpp"
67 #include "utilities/copy.hpp"
68 #include "utilities/defaultStream.hpp"
69 #include "utilities/dtrace.hpp"
70 #include "utilities/events.hpp"
71 #include "utilities/histogram.hpp"
72 #include "utilities/top.hpp"
73 #include "utilities/utf8.hpp"
74 #ifdef TARGET_OS_FAMILY_linux
75 # include "jvm_linux.h"
76 #endif
77 #ifdef TARGET_OS_FAMILY_solaris
78 # include "jvm_solaris.h"
79 #endif
80 #ifdef TARGET_OS_FAMILY_windows
81 # include "jvm_windows.h"
82 #endif
83 #ifdef TARGET_OS_FAMILY_aix
84 # include "jvm_aix.h"
85 #endif
86 #ifdef TARGET_OS_FAMILY_bsd
87 # include "jvm_bsd.h"
88 #endif
89
90 #include <errno.h>
91
92 /*
93 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
94 such ctors and calls MUST NOT come between an oop declaration/init and its
95 usage because if objects are move this may cause various memory stomps, bus
96 errors and segfaults. Here is a cookbook for causing so called "naked oop
97 failures":
98
99 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
100 JVMWrapper("JVM_GetClassDeclaredFields");
101
102 // Object address to be held directly in mirror & not visible to GC
103 oop mirror = JNIHandles::resolve_non_null(ofClass);
104
105 // If this ctor can hit a safepoint, moving objects around, then
106 ComplexConstructor foo;
107
108 // Boom! mirror may point to JUNK instead of the intended object
109 (some dereference of mirror)
110
111 // Here's another call that may block for GC, making mirror stale
112 MutexLocker ml(some_lock);
113
114 // And here's an initializer that can result in a stale oop
115 // all in one step.
116 oop o = call_that_can_throw_exception(TRAPS);
117
118
119 The solution is to keep the oop declaration BELOW the ctor or function
120 call that might cause a GC, do another resolve to reassign the oop, or
121 consider use of a Handle instead of an oop so there is immunity from object
122 motion. But note that the "QUICK" entries below do not have a handlemark
123 and thus can only support use of handles passed in.
124 */
125
126 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
127 ResourceMark rm;
128 int line_number = -1;
129 const char * source_file = NULL;
130 const char * trace = "explicit";
131 InstanceKlass* caller = NULL;
132 JavaThread* jthread = JavaThread::current();
133 if (jthread->has_last_Java_frame()) {
134 vframeStream vfst(jthread);
135
136 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
137 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
138 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
139 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
140 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
141
142 Method* last_caller = NULL;
143
144 while (!vfst.at_end()) {
145 Method* m = vfst.method();
146 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
147 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
148 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
149 break;
150 }
151 last_caller = m;
152 vfst.next();
153 }
154 // if this is called from Class.forName0 and that is called from Class.forName,
155 // then print the caller of Class.forName. If this is Class.loadClass, then print
156 // that caller, otherwise keep quiet since this should be picked up elsewhere.
157 bool found_it = false;
158 if (!vfst.at_end() &&
159 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
160 vfst.method()->name() == vmSymbols::forName0_name()) {
161 vfst.next();
162 if (!vfst.at_end() &&
163 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
164 vfst.method()->name() == vmSymbols::forName_name()) {
165 vfst.next();
166 found_it = true;
167 }
168 } else if (last_caller != NULL &&
169 last_caller->method_holder()->name() ==
170 vmSymbols::java_lang_ClassLoader() &&
171 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
172 last_caller->name() == vmSymbols::loadClass_name())) {
173 found_it = true;
174 } else if (!vfst.at_end()) {
175 if (vfst.method()->is_native()) {
176 // JNI call
177 found_it = true;
178 }
179 }
180 if (found_it && !vfst.at_end()) {
181 // found the caller
182 caller = vfst.method()->method_holder();
183 line_number = vfst.method()->line_number_from_bci(vfst.bci());
184 if (line_number == -1) {
185 // show method name if it's a native method
186 trace = vfst.method()->name_and_sig_as_C_string();
187 }
188 Symbol* s = caller->source_file_name();
189 if (s != NULL) {
190 source_file = s->as_C_string();
191 }
192 }
193 }
194 if (caller != NULL) {
195 if (to_class != caller) {
196 const char * from = caller->external_name();
197 const char * to = to_class->external_name();
198 // print in a single call to reduce interleaving between threads
199 if (source_file != NULL) {
200 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
201 } else {
202 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
203 }
204 }
205 }
206 }
207
208 void trace_class_resolution(Klass* to_class) {
209 EXCEPTION_MARK;
210 trace_class_resolution_impl(to_class, THREAD);
211 if (HAS_PENDING_EXCEPTION) {
212 CLEAR_PENDING_EXCEPTION;
213 }
214 }
215
216 // Wrapper to trace JVM functions
217
218 #ifdef ASSERT
219 class JVMTraceWrapper : public StackObj {
220 public:
221 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
222 if (TraceJVMCalls) {
223 va_list ap;
224 va_start(ap, format);
225 tty->print("JVM ");
226 tty->vprint_cr(format, ap);
227 va_end(ap);
228 }
229 }
230 };
231
232 Histogram* JVMHistogram;
233 volatile jint JVMHistogram_lock = 0;
234
235 class JVMHistogramElement : public HistogramElement {
236 public:
237 JVMHistogramElement(const char* name);
238 };
239
240 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
241 _name = elementName;
242 uintx count = 0;
243
244 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
245 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
246 count +=1;
247 if ( (WarnOnStalledSpinLock > 0)
248 && (count % WarnOnStalledSpinLock == 0)) {
249 warning("JVMHistogram_lock seems to be stalled");
250 }
251 }
252 }
253
254 if(JVMHistogram == NULL)
255 JVMHistogram = new Histogram("JVM Call Counts",100);
256
257 JVMHistogram->add_element(this);
258 Atomic::dec(&JVMHistogram_lock);
259 }
260
261 #define JVMCountWrapper(arg) \
262 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
263 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
264
265 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
266 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
267 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
268 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
269 #else
270 #define JVMWrapper(arg1)
271 #define JVMWrapper2(arg1, arg2)
272 #define JVMWrapper3(arg1, arg2, arg3)
273 #define JVMWrapper4(arg1, arg2, arg3, arg4)
274 #endif
275
276
277 // Interface version /////////////////////////////////////////////////////////////////////
278
279
280 JVM_LEAF(jint, JVM_GetInterfaceVersion())
281 return JVM_INTERFACE_VERSION;
282 JVM_END
283
284
285 // java.lang.System //////////////////////////////////////////////////////////////////////
286
287
288 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
289 JVMWrapper("JVM_CurrentTimeMillis");
290 return os::javaTimeMillis();
291 JVM_END
292
293 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
294 JVMWrapper("JVM_NanoTime");
295 return os::javaTimeNanos();
296 JVM_END
297
298
299 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
300 jobject dst, jint dst_pos, jint length))
301 JVMWrapper("JVM_ArrayCopy");
302 // Check if we have null pointers
303 if (src == NULL || dst == NULL) {
304 THROW(vmSymbols::java_lang_NullPointerException());
305 }
306 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
307 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
308 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
309 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
310 // Do copy
311 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
312 JVM_END
313
314
315 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
316 JavaValue r(T_OBJECT);
317 // public synchronized Object put(Object key, Object value);
318 HandleMark hm(THREAD);
319 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
320 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
321 JavaCalls::call_virtual(&r,
322 props,
323 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
324 vmSymbols::put_name(),
325 vmSymbols::object_object_object_signature(),
326 key_str,
327 value_str,
328 THREAD);
329 }
330
331
332 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
333
334
335 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
336 JVMWrapper("JVM_InitProperties");
337 ResourceMark rm;
338
339 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
340
341 // System property list includes both user set via -D option and
342 // jvm system specific properties.
343 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
344 PUTPROP(props, p->key(), p->value());
345 }
346
347 // Convert the -XX:MaxDirectMemorySize= command line flag
348 // to the sun.nio.MaxDirectMemorySize property.
349 // Do this after setting user properties to prevent people
350 // from setting the value with a -D option, as requested.
351 {
352 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
353 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
354 } else {
355 char as_chars[256];
356 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
357 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
358 }
359 }
360
361 // JVM monitoring and management support
362 // Add the sun.management.compiler property for the compiler's name
363 {
364 #undef CSIZE
365 #if defined(_LP64) || defined(_WIN64)
366 #define CSIZE "64-Bit "
367 #else
368 #define CSIZE
369 #endif // 64bit
370
371 #ifdef TIERED
372 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
373 #else
374 #if defined(COMPILER1)
375 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
376 #elif defined(COMPILER2)
377 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
378 #else
379 const char* compiler_name = "";
380 #endif // compilers
381 #endif // TIERED
382
383 if (*compiler_name != '\0' &&
384 (Arguments::mode() != Arguments::_int)) {
385 PUTPROP(props, "sun.management.compiler", compiler_name);
386 }
387 }
388
389 return properties;
390 JVM_END
391
392
393 /*
394 * Return the temporary directory that the VM uses for the attach
395 * and perf data files.
396 *
397 * It is important that this directory is well-known and the
398 * same for all VM instances. It cannot be affected by configuration
399 * variables such as java.io.tmpdir.
400 */
401 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
402 JVMWrapper("JVM_GetTemporaryDirectory");
403 HandleMark hm(THREAD);
404 const char* temp_dir = os::get_temp_directory();
405 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
406 return (jstring) JNIHandles::make_local(env, h());
407 JVM_END
408
409
410 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
411
412 extern volatile jint vm_created;
413
414 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
415 if (vm_created != 0 && (code == 0)) {
416 // The VM is about to exit. We call back into Java to check whether finalizers should be run
417 Universe::run_finalizers_on_exit();
418 }
419 before_exit(thread);
420 vm_exit(code);
421 JVM_END
422
423
424 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
425 before_exit(thread);
426 vm_exit(code);
427 JVM_END
428
429
430 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
431 register_on_exit_function(func);
432 JVM_END
433
434
435 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
436 JVMWrapper("JVM_GC");
437 if (!DisableExplicitGC) {
438 Universe::heap()->collect(GCCause::_java_lang_system_gc);
439 }
440 JVM_END
441
442
443 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
444 JVMWrapper("JVM_MaxObjectInspectionAge");
445 return Universe::heap()->millis_since_last_gc();
446 JVM_END
447
448
449 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
450 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
451 JVM_END
452
453
454 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
455 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
456 JVM_END
457
458 static inline jlong convert_size_t_to_jlong(size_t val) {
459 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
460 NOT_LP64 (return (jlong)val;)
461 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
462 }
463
464 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
465 JVMWrapper("JVM_TotalMemory");
466 size_t n = Universe::heap()->capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
469
470
471 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
472 JVMWrapper("JVM_FreeMemory");
473 CollectedHeap* ch = Universe::heap();
474 size_t n;
475 {
476 MutexLocker x(Heap_lock);
477 n = ch->capacity() - ch->used();
478 }
479 return convert_size_t_to_jlong(n);
480 JVM_END
481
482
483 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
484 JVMWrapper("JVM_MaxMemory");
485 size_t n = Universe::heap()->max_capacity();
486 return convert_size_t_to_jlong(n);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
491 JVMWrapper("JVM_ActiveProcessorCount");
492 return os::active_processor_count();
493 JVM_END
494
495
496
497 // java.lang.Throwable //////////////////////////////////////////////////////
498
499
500 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
501 JVMWrapper("JVM_FillInStackTrace");
502 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
503 java_lang_Throwable::fill_in_stack_trace(exception);
504 JVM_END
505
506
507 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
508 JVMWrapper("JVM_GetStackTraceDepth");
509 oop exception = JNIHandles::resolve(throwable);
510 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
511 JVM_END
512
513
514 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
515 JVMWrapper("JVM_GetStackTraceElement");
516 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
517 oop exception = JNIHandles::resolve(throwable);
518 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
519 return JNIHandles::make_local(env, element);
520 JVM_END
521
522
523 // java.lang.Object ///////////////////////////////////////////////
524
525
526 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
527 JVMWrapper("JVM_IHashCode");
528 // as implemented in the classic virtual machine; return 0 if object is NULL
529 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
530 JVM_END
531
532
533 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
534 JVMWrapper("JVM_MonitorWait");
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
536 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
537 if (JvmtiExport::should_post_monitor_wait()) {
538 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
539
540 // The current thread already owns the monitor and it has not yet
541 // been added to the wait queue so the current thread cannot be
542 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
543 // event handler cannot accidentally consume an unpark() meant for
544 // the ParkEvent associated with this ObjectMonitor.
545 }
546 ObjectSynchronizer::wait(obj, ms, CHECK);
547 JVM_END
548
549
550 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
551 JVMWrapper("JVM_MonitorNotify");
552 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
553 ObjectSynchronizer::notify(obj, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
558 JVMWrapper("JVM_MonitorNotifyAll");
559 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
560 ObjectSynchronizer::notifyall(obj, CHECK);
561 JVM_END
562
563
564 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
565 JVMWrapper("JVM_Clone");
566 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
567 const KlassHandle klass (THREAD, obj->klass());
568 JvmtiVMObjectAllocEventCollector oam;
569
570 #ifdef ASSERT
571 // Just checking that the cloneable flag is set correct
572 if (obj->is_array()) {
573 guarantee(klass->is_cloneable(), "all arrays are cloneable");
574 } else {
575 guarantee(obj->is_instance(), "should be instanceOop");
576 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
577 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
578 }
579 #endif
580
581 // Check if class of obj supports the Cloneable interface.
582 // All arrays are considered to be cloneable (See JLS 20.1.5)
583 if (!klass->is_cloneable()) {
584 ResourceMark rm(THREAD);
585 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
586 }
587
588 // Make shallow object copy
589 const int size = obj->size();
590 oop new_obj = NULL;
591 if (obj->is_array()) {
592 const int length = ((arrayOop)obj())->length();
593 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
594 } else {
595 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
596 }
597 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
598 // is modifying a reference field in the clonee, a non-oop-atomic copy might
599 // be suspended in the middle of copying the pointer and end up with parts
600 // of two different pointers in the field. Subsequent dereferences will crash.
601 // 4846409: an oop-copy of objects with long or double fields or arrays of same
602 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
603 // of oops. We know objects are aligned on a minimum of an jlong boundary.
604 // The same is true of StubRoutines::object_copy and the various oop_copy
605 // variants, and of the code generated by the inline_native_clone intrinsic.
606 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
607 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
608 (size_t)align_object_size(size) / HeapWordsPerLong);
609 // Clear the header
610 new_obj->init_mark();
611
612 // Store check (mark entire object and let gc sort it out)
613 BarrierSet* bs = Universe::heap()->barrier_set();
614 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
615 bs->write_region(MemRegion((HeapWord*)new_obj, size));
616
617 // Caution: this involves a java upcall, so the clone should be
618 // "gc-robust" by this stage.
619 if (klass->has_finalizer()) {
620 assert(obj->is_instance(), "should be instanceOop");
621 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
622 }
623
624 return JNIHandles::make_local(env, oop(new_obj));
625 JVM_END
626
627 // java.lang.Compiler ////////////////////////////////////////////////////
628
629 // The initial cuts of the HotSpot VM will not support JITs, and all existing
630 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
631 // functions are all silently ignored unless JVM warnings are printed.
632
633 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
634 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
635 JVM_END
636
637
638 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
639 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
640 return JNI_FALSE;
641 JVM_END
642
643
644 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
645 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
646 return JNI_FALSE;
647 JVM_END
648
649
650 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
651 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
652 return JNI_FALSE;
653 JVM_END
654
655
656 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
657 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
658 return NULL;
659 JVM_END
660
661
662 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
663 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
664 JVM_END
665
666
667 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
668 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
669 JVM_END
670
671
672
673 // Error message support //////////////////////////////////////////////////////
674
675 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
676 JVMWrapper("JVM_GetLastErrorString");
677 return (jint)os::lasterror(buf, len);
678 JVM_END
679
680
681 // java.io.File ///////////////////////////////////////////////////////////////
682
683 JVM_LEAF(char*, JVM_NativePath(char* path))
684 JVMWrapper2("JVM_NativePath (%s)", path);
685 return os::native_path(path);
686 JVM_END
687
688
689 // Misc. class handling ///////////////////////////////////////////////////////////
690
691
692 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
693 JVMWrapper("JVM_GetCallerClass");
694
695 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
696 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
697 // temporarily for existing code to use until a replacement API is defined.
698 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
699 Klass* k = thread->security_get_caller_class(depth);
700 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
701 }
702
703 // Getting the class of the caller frame.
704 //
705 // The call stack at this point looks something like this:
706 //
707 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
708 // [1] [ @CallerSensitive API.method ]
709 // [.] [ (skipped intermediate frames) ]
710 // [n] [ caller ]
711 vframeStream vfst(thread);
712 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
713 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
714 Method* m = vfst.method();
715 assert(m != NULL, "sanity");
716 switch (n) {
717 case 0:
718 // This must only be called from Reflection.getCallerClass
719 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
720 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
721 }
722 // fall-through
723 case 1:
724 // Frame 0 and 1 must be caller sensitive.
725 if (!m->caller_sensitive()) {
726 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
727 }
728 break;
729 default:
730 if (!m->is_ignored_by_security_stack_walk()) {
731 // We have reached the desired frame; return the holder class.
732 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
733 }
734 break;
735 }
736 }
737 return NULL;
738 JVM_END
739
740
741 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
742 JVMWrapper("JVM_FindPrimitiveClass");
743 oop mirror = NULL;
744 BasicType t = name2type(utf);
745 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
746 mirror = Universe::java_mirror(t);
747 }
748 if (mirror == NULL) {
749 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
750 } else {
751 return (jclass) JNIHandles::make_local(env, mirror);
752 }
753 JVM_END
754
755
756 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
757 JVMWrapper("JVM_ResolveClass");
758 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
759 JVM_END
760
761
762 // Returns a class loaded by the bootstrap class loader; or null
763 // if not found. ClassNotFoundException is not thrown.
764 //
765 // Rationale behind JVM_FindClassFromBootLoader
766 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
767 // b> because of (a) java.dll has a direct dependecy on the unexported
768 // private symbol "_JVM_FindClassFromClassLoader@20".
769 // c> the launcher cannot use the private symbol as it dynamically opens
770 // the entry point, so if something changes, the launcher will fail
771 // unexpectedly at runtime, it is safest for the launcher to dlopen a
772 // stable exported interface.
773 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
774 // signature to change from _JVM_FindClassFromClassLoader@20 to
775 // JVM_FindClassFromClassLoader and will not be backward compatible
776 // with older JDKs.
777 // Thus a public/stable exported entry point is the right solution,
778 // public here means public in linker semantics, and is exported only
779 // to the JDK, and is not intended to be a public API.
780
781 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
782 const char* name))
783 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
784
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 return NULL;
790 }
791
792 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
793 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
794 if (k == NULL) {
795 return NULL;
796 }
797
798 if (TraceClassResolution) {
799 trace_class_resolution(k);
800 }
801 return (jclass) JNIHandles::make_local(env, k->java_mirror());
802 JVM_END
803
804 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
805 jboolean init, jobject loader,
806 jboolean throwError))
807 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
808 throwError ? "error" : "exception");
809 // Java libraries should ensure that name is never null...
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 if (throwError) {
814 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
815 } else {
816 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
817 }
818 }
819 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
820 Handle h_loader(THREAD, JNIHandles::resolve(loader));
821 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
822 Handle(), throwError, THREAD);
823
824 if (TraceClassResolution && result != NULL) {
825 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
826 }
827 return result;
828 JVM_END
829
830
831 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
832 jboolean init, jclass from))
833 JVMWrapper2("JVM_FindClassFromClass %s", name);
834 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
835 // It's impossible to create this class; the name cannot fit
836 // into the constant pool.
837 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
838 }
839 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
840 oop from_class_oop = JNIHandles::resolve(from);
841 Klass* from_class = (from_class_oop == NULL)
842 ? (Klass*)NULL
843 : java_lang_Class::as_Klass(from_class_oop);
844 oop class_loader = NULL;
845 oop protection_domain = NULL;
846 if (from_class != NULL) {
847 class_loader = from_class->class_loader();
848 protection_domain = from_class->protection_domain();
849 }
850 Handle h_loader(THREAD, class_loader);
851 Handle h_prot (THREAD, protection_domain);
852 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
853 h_prot, true, thread);
854
855 if (TraceClassResolution && result != NULL) {
856 // this function is generally only used for class loading during verification.
857 ResourceMark rm;
858 oop from_mirror = JNIHandles::resolve_non_null(from);
859 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
860 const char * from_name = from_class->external_name();
861
862 oop mirror = JNIHandles::resolve_non_null(result);
863 Klass* to_class = java_lang_Class::as_Klass(mirror);
864 const char * to = to_class->external_name();
865 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
866 }
867
868 return result;
869 JVM_END
870
871 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
872 if (loader.is_null()) {
873 return;
874 }
875
876 // check whether the current caller thread holds the lock or not.
877 // If not, increment the corresponding counter
878 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
879 ObjectSynchronizer::owner_self) {
880 counter->inc();
881 }
882 }
883
884 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
885 // and JVM_DefineClassWithSourceCond()
886 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
887 jobject loader, const jbyte *buf,
888 jsize len, jobject pd, const char *source,
889 jboolean verify, TRAPS) {
890 if (source == NULL) source = "__JVM_DefineClass__";
891
892 assert(THREAD->is_Java_thread(), "must be a JavaThread");
893 JavaThread* jt = (JavaThread*) THREAD;
894
895 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
896 ClassLoader::perf_define_appclass_selftime(),
897 ClassLoader::perf_define_appclasses(),
898 jt->get_thread_stat()->perf_recursion_counts_addr(),
899 jt->get_thread_stat()->perf_timers_addr(),
900 PerfClassTraceTime::DEFINE_CLASS);
901
902 if (UsePerfData) {
903 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
904 }
905
906 // Since exceptions can be thrown, class initialization can take place
907 // if name is NULL no check for class name in .class stream has to be made.
908 TempNewSymbol class_name = NULL;
909 if (name != NULL) {
910 const int str_len = (int)strlen(name);
911 if (str_len > Symbol::max_length()) {
912 // It's impossible to create this class; the name cannot fit
913 // into the constant pool.
914 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
915 }
916 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
917 }
918
919 ResourceMark rm(THREAD);
920 ClassFileStream st((u1*) buf, len, (char *)source);
921 Handle class_loader (THREAD, JNIHandles::resolve(loader));
922 if (UsePerfData) {
923 is_lock_held_by_thread(class_loader,
924 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
925 THREAD);
926 }
927 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
928 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
929 protection_domain, &st,
930 verify != 0,
931 CHECK_NULL);
932
933 if (TraceClassResolution && k != NULL) {
934 trace_class_resolution(k);
935 }
936
937 return (jclass) JNIHandles::make_local(env, k->java_mirror());
938 }
939
940
941 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
942 JVMWrapper2("JVM_DefineClass %s", name);
943
944 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
945 JVM_END
946
947
948 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
949 JVMWrapper2("JVM_DefineClassWithSource %s", name);
950
951 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
952 JVM_END
953
954 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
955 jobject loader, const jbyte *buf,
956 jsize len, jobject pd,
957 const char *source, jboolean verify))
958 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
959
960 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
961 JVM_END
962
963 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
964 JVMWrapper("JVM_FindLoadedClass");
965 ResourceMark rm(THREAD);
966
967 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
968 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
969
970 const char* str = java_lang_String::as_utf8_string(string());
971 // Sanity check, don't expect null
972 if (str == NULL) return NULL;
973
974 const int str_len = (int)strlen(str);
975 if (str_len > Symbol::max_length()) {
976 // It's impossible to create this class; the name cannot fit
977 // into the constant pool.
978 return NULL;
979 }
980 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
981
982 // Security Note:
983 // The Java level wrapper will perform the necessary security check allowing
984 // us to pass the NULL as the initiating class loader.
985 Handle h_loader(THREAD, JNIHandles::resolve(loader));
986 if (UsePerfData) {
987 is_lock_held_by_thread(h_loader,
988 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
989 THREAD);
990 }
991
992 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
993 h_loader,
994 Handle(),
995 CHECK_NULL);
996
997 return (k == NULL) ? NULL :
998 (jclass) JNIHandles::make_local(env, k->java_mirror());
999 JVM_END
1000
1001
1002 // Reflection support //////////////////////////////////////////////////////////////////////////////
1003
1004 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1005 assert (cls != NULL, "illegal class");
1006 JVMWrapper("JVM_GetClassName");
1007 JvmtiVMObjectAllocEventCollector oam;
1008 ResourceMark rm(THREAD);
1009 const char* name;
1010 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1011 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1012 } else {
1013 // Consider caching interned string in Klass
1014 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1015 assert(k->is_klass(), "just checking");
1016 name = k->external_name();
1017 }
1018 oop result = StringTable::intern((char*) name, CHECK_NULL);
1019 return (jstring) JNIHandles::make_local(env, result);
1020 JVM_END
1021
1022
1023 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1024 JVMWrapper("JVM_GetClassInterfaces");
1025 JvmtiVMObjectAllocEventCollector oam;
1026 oop mirror = JNIHandles::resolve_non_null(cls);
1027
1028 // Special handling for primitive objects
1029 if (java_lang_Class::is_primitive(mirror)) {
1030 // Primitive objects does not have any interfaces
1031 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1032 return (jobjectArray) JNIHandles::make_local(env, r);
1033 }
1034
1035 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1036 // Figure size of result array
1037 int size;
1038 if (klass->oop_is_instance()) {
1039 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1040 } else {
1041 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1042 size = 2;
1043 }
1044
1045 // Allocate result array
1046 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1047 objArrayHandle result (THREAD, r);
1048 // Fill in result
1049 if (klass->oop_is_instance()) {
1050 // Regular instance klass, fill in all local interfaces
1051 for (int index = 0; index < size; index++) {
1052 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1053 result->obj_at_put(index, k->java_mirror());
1054 }
1055 } else {
1056 // All arrays implement java.lang.Cloneable and java.io.Serializable
1057 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1058 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1059 }
1060 return (jobjectArray) JNIHandles::make_local(env, result());
1061 JVM_END
1062
1063
1064 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1065 JVMWrapper("JVM_GetClassLoader");
1066 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1067 return NULL;
1068 }
1069 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1070 oop loader = k->class_loader();
1071 return JNIHandles::make_local(env, loader);
1072 JVM_END
1073
1074
1075 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1076 JVMWrapper("JVM_IsInterface");
1077 oop mirror = JNIHandles::resolve_non_null(cls);
1078 if (java_lang_Class::is_primitive(mirror)) {
1079 return JNI_FALSE;
1080 }
1081 Klass* k = java_lang_Class::as_Klass(mirror);
1082 jboolean result = k->is_interface();
1083 assert(!result || k->oop_is_instance(),
1084 "all interfaces are instance types");
1085 // The compiler intrinsic for isInterface tests the
1086 // Klass::_access_flags bits in the same way.
1087 return result;
1088 JVM_END
1089
1090
1091 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1092 JVMWrapper("JVM_GetClassSigners");
1093 JvmtiVMObjectAllocEventCollector oam;
1094 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1095 // There are no signers for primitive types
1096 return NULL;
1097 }
1098
1099 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1100
1101 // If there are no signers set in the class, or if the class
1102 // is an array, return NULL.
1103 if (signers == NULL) return NULL;
1104
1105 // copy of the signers array
1106 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1107 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1108 for (int index = 0; index < signers->length(); index++) {
1109 signers_copy->obj_at_put(index, signers->obj_at(index));
1110 }
1111
1112 // return the copy
1113 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1114 JVM_END
1115
1116
1117 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1118 JVMWrapper("JVM_SetClassSigners");
1119 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1120 // This call is ignored for primitive types and arrays.
1121 // Signers are only set once, ClassLoader.java, and thus shouldn't
1122 // be called with an array. Only the bootstrap loader creates arrays.
1123 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1124 if (k->oop_is_instance()) {
1125 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1126 }
1127 }
1128 JVM_END
1129
1130
1131 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1132 JVMWrapper("JVM_GetProtectionDomain");
1133 if (JNIHandles::resolve(cls) == NULL) {
1134 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1135 }
1136
1137 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1138 // Primitive types does not have a protection domain.
1139 return NULL;
1140 }
1141
1142 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1143 return (jobject) JNIHandles::make_local(env, pd);
1144 JVM_END
1145
1146
1147 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1148 // If there is a security manager and protection domain, check the access
1149 // in the protection domain, otherwise it is authorized.
1150 if (java_lang_System::has_security_manager()) {
1151
1152 // For bootstrapping, if pd implies method isn't in the JDK, allow
1153 // this context to revert to older behavior.
1154 // In this case the isAuthorized field in AccessControlContext is also not
1155 // present.
1156 if (Universe::protection_domain_implies_method() == NULL) {
1157 return true;
1158 }
1159
1160 // Whitelist certain access control contexts
1161 if (java_security_AccessControlContext::is_authorized(context)) {
1162 return true;
1163 }
1164
1165 oop prot = klass->protection_domain();
1166 if (prot != NULL) {
1167 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1168 // in the new wrapper.
1169 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1170 Handle h_prot(THREAD, prot);
1171 JavaValue result(T_BOOLEAN);
1172 JavaCallArguments args(h_prot);
1173 JavaCalls::call(&result, m, &args, CHECK_false);
1174 return (result.get_jboolean() != 0);
1175 }
1176 }
1177 return true;
1178 }
1179
1180 // Create an AccessControlContext with a protection domain with null codesource
1181 // and null permissions - which gives no permissions.
1182 oop create_dummy_access_control_context(TRAPS) {
1183 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1184 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1185 // Call constructor ProtectionDomain(null, null);
1186 JavaValue result(T_VOID);
1187 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1188 vmSymbols::object_initializer_name(),
1189 vmSymbols::codesource_permissioncollection_signature(),
1190 Handle(), Handle(), CHECK_NULL);
1191
1192 // new ProtectionDomain[] {pd};
1193 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1194 context->obj_at_put(0, obj());
1195
1196 // new AccessControlContext(new ProtectionDomain[] {pd})
1197 objArrayHandle h_context(THREAD, context);
1198 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1199 return acc;
1200 }
1201
1202 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1203 JVMWrapper("JVM_DoPrivileged");
1204
1205 if (action == NULL) {
1206 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1207 }
1208
1209 // Compute the frame initiating the do privileged operation and setup the privileged stack
1210 vframeStream vfst(thread);
1211 vfst.security_get_caller_frame(1);
1212
1213 if (vfst.at_end()) {
1214 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1215 }
1216
1217 Method* method = vfst.method();
1218 instanceKlassHandle klass (THREAD, method->method_holder());
1219
1220 // Check that action object understands "Object run()"
1221 Handle h_context;
1222 if (context != NULL) {
1223 h_context = Handle(THREAD, JNIHandles::resolve(context));
1224 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1225 if (!authorized) {
1226 // Create an unprivileged access control object and call it's run function
1227 // instead.
1228 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1229 h_context = Handle(THREAD, noprivs);
1230 }
1231 }
1232
1233 // Check that action object understands "Object run()"
1234 Handle object (THREAD, JNIHandles::resolve(action));
1235
1236 // get run() method
1237 Method* m_oop = object->klass()->uncached_lookup_method(
1238 vmSymbols::run_method_name(),
1239 vmSymbols::void_object_signature(),
1240 Klass::normal);
1241 methodHandle m (THREAD, m_oop);
1242 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1243 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1244 }
1245
1246 // Stack allocated list of privileged stack elements
1247 PrivilegedElement pi;
1248 if (!vfst.at_end()) {
1249 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1250 thread->set_privileged_stack_top(&pi);
1251 }
1252
1253
1254 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1255 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1256 Handle pending_exception;
1257 JavaValue result(T_OBJECT);
1258 JavaCallArguments args(object);
1259 JavaCalls::call(&result, m, &args, THREAD);
1260
1261 // done with action, remove ourselves from the list
1262 if (!vfst.at_end()) {
1263 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1264 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1265 }
1266
1267 if (HAS_PENDING_EXCEPTION) {
1268 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1269 CLEAR_PENDING_EXCEPTION;
1270 // JVMTI has already reported the pending exception
1271 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1272 if (THREAD->is_Java_thread()) {
1273 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1274 }
1275 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1276 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1277 // Throw a java.security.PrivilegedActionException(Exception e) exception
1278 JavaCallArguments args(pending_exception);
1279 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1280 vmSymbols::exception_void_signature(),
1281 &args);
1282 }
1283 }
1284
1285 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1286 return JNIHandles::make_local(env, (oop) result.get_jobject());
1287 JVM_END
1288
1289
1290 // Returns the inherited_access_control_context field of the running thread.
1291 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1292 JVMWrapper("JVM_GetInheritedAccessControlContext");
1293 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1294 return JNIHandles::make_local(env, result);
1295 JVM_END
1296
1297 class RegisterArrayForGC {
1298 private:
1299 JavaThread *_thread;
1300 public:
1301 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1302 _thread = thread;
1303 _thread->register_array_for_gc(array);
1304 }
1305
1306 ~RegisterArrayForGC() {
1307 _thread->register_array_for_gc(NULL);
1308 }
1309 };
1310
1311
1312 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1313 JVMWrapper("JVM_GetStackAccessControlContext");
1314 if (!UsePrivilegedStack) return NULL;
1315
1316 ResourceMark rm(THREAD);
1317 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1318 JvmtiVMObjectAllocEventCollector oam;
1319
1320 // count the protection domains on the execution stack. We collapse
1321 // duplicate consecutive protection domains into a single one, as
1322 // well as stopping when we hit a privileged frame.
1323
1324 // Use vframeStream to iterate through Java frames
1325 vframeStream vfst(thread);
1326
1327 oop previous_protection_domain = NULL;
1328 Handle privileged_context(thread, NULL);
1329 bool is_privileged = false;
1330 oop protection_domain = NULL;
1331
1332 for(; !vfst.at_end(); vfst.next()) {
1333 // get method of frame
1334 Method* method = vfst.method();
1335 intptr_t* frame_id = vfst.frame_id();
1336
1337 // check the privileged frames to see if we have a match
1338 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1339 // this frame is privileged
1340 is_privileged = true;
1341 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1342 protection_domain = thread->privileged_stack_top()->protection_domain();
1343 } else {
1344 protection_domain = method->method_holder()->protection_domain();
1345 }
1346
1347 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1348 local_array->push(protection_domain);
1349 previous_protection_domain = protection_domain;
1350 }
1351
1352 if (is_privileged) break;
1353 }
1354
1355
1356 // either all the domains on the stack were system domains, or
1357 // we had a privileged system domain
1358 if (local_array->is_empty()) {
1359 if (is_privileged && privileged_context.is_null()) return NULL;
1360
1361 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1362 return JNIHandles::make_local(env, result);
1363 }
1364
1365 // the resource area must be registered in case of a gc
1366 RegisterArrayForGC ragc(thread, local_array);
1367 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1368 local_array->length(), CHECK_NULL);
1369 objArrayHandle h_context(thread, context);
1370 for (int index = 0; index < local_array->length(); index++) {
1371 h_context->obj_at_put(index, local_array->at(index));
1372 }
1373
1374 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1375
1376 return JNIHandles::make_local(env, result);
1377 JVM_END
1378
1379
1380 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1381 JVMWrapper("JVM_IsArrayClass");
1382 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1383 return (k != NULL) && k->oop_is_array() ? true : false;
1384 JVM_END
1385
1386
1387 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1388 JVMWrapper("JVM_IsPrimitiveClass");
1389 oop mirror = JNIHandles::resolve_non_null(cls);
1390 return (jboolean) java_lang_Class::is_primitive(mirror);
1391 JVM_END
1392
1393
1394 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1395 JVMWrapper("JVM_GetComponentType");
1396 oop mirror = JNIHandles::resolve_non_null(cls);
1397 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1398 return (jclass) JNIHandles::make_local(env, result);
1399 JVM_END
1400
1401
1402 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1403 JVMWrapper("JVM_GetClassModifiers");
1404 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1405 // Primitive type
1406 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1407 }
1408
1409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1410 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1411 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1412 return k->modifier_flags();
1413 JVM_END
1414
1415
1416 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1417
1418 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1419 JvmtiVMObjectAllocEventCollector oam;
1420 // ofClass is a reference to a java_lang_Class object. The mirror object
1421 // of an InstanceKlass
1422
1423 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1424 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1425 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1426 return (jobjectArray)JNIHandles::make_local(env, result);
1427 }
1428
1429 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1430 InnerClassesIterator iter(k);
1431
1432 if (iter.length() == 0) {
1433 // Neither an inner nor outer class
1434 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1435 return (jobjectArray)JNIHandles::make_local(env, result);
1436 }
1437
1438 // find inner class info
1439 constantPoolHandle cp(thread, k->constants());
1440 int length = iter.length();
1441
1442 // Allocate temp. result array
1443 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1444 objArrayHandle result (THREAD, r);
1445 int members = 0;
1446
1447 for (; !iter.done(); iter.next()) {
1448 int ioff = iter.inner_class_info_index();
1449 int ooff = iter.outer_class_info_index();
1450
1451 if (ioff != 0 && ooff != 0) {
1452 // Check to see if the name matches the class we're looking for
1453 // before attempting to find the class.
1454 if (cp->klass_name_at_matches(k, ooff)) {
1455 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1456 if (outer_klass == k()) {
1457 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1458 instanceKlassHandle inner_klass (THREAD, ik);
1459
1460 // Throws an exception if outer klass has not declared k as
1461 // an inner klass
1462 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1463
1464 result->obj_at_put(members, inner_klass->java_mirror());
1465 members++;
1466 }
1467 }
1468 }
1469 }
1470
1471 if (members != length) {
1472 // Return array of right length
1473 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1474 for(int i = 0; i < members; i++) {
1475 res->obj_at_put(i, result->obj_at(i));
1476 }
1477 return (jobjectArray)JNIHandles::make_local(env, res);
1478 }
1479
1480 return (jobjectArray)JNIHandles::make_local(env, result());
1481 JVM_END
1482
1483
1484 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1485 {
1486 // ofClass is a reference to a java_lang_Class object.
1487 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1488 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1489 return NULL;
1490 }
1491
1492 bool inner_is_member = false;
1493 Klass* outer_klass
1494 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1495 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1496 if (outer_klass == NULL) return NULL; // already a top-level class
1497 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1498 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1499 }
1500 JVM_END
1501
1502 // should be in InstanceKlass.cpp, but is here for historical reasons
1503 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1504 bool* inner_is_member,
1505 TRAPS) {
1506 Thread* thread = THREAD;
1507 InnerClassesIterator iter(k);
1508 if (iter.length() == 0) {
1509 // No inner class info => no declaring class
1510 return NULL;
1511 }
1512
1513 constantPoolHandle i_cp(thread, k->constants());
1514
1515 bool found = false;
1516 Klass* ok;
1517 instanceKlassHandle outer_klass;
1518 *inner_is_member = false;
1519
1520 // Find inner_klass attribute
1521 for (; !iter.done() && !found; iter.next()) {
1522 int ioff = iter.inner_class_info_index();
1523 int ooff = iter.outer_class_info_index();
1524 int noff = iter.inner_name_index();
1525 if (ioff != 0) {
1526 // Check to see if the name matches the class we're looking for
1527 // before attempting to find the class.
1528 if (i_cp->klass_name_at_matches(k, ioff)) {
1529 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1530 found = (k() == inner_klass);
1531 if (found && ooff != 0) {
1532 ok = i_cp->klass_at(ooff, CHECK_NULL);
1533 outer_klass = instanceKlassHandle(thread, ok);
1534 *inner_is_member = true;
1535 }
1536 }
1537 }
1538 }
1539
1540 if (found && outer_klass.is_null()) {
1541 // It may be anonymous; try for that.
1542 int encl_method_class_idx = k->enclosing_method_class_index();
1543 if (encl_method_class_idx != 0) {
1544 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1545 outer_klass = instanceKlassHandle(thread, ok);
1546 *inner_is_member = false;
1547 }
1548 }
1549
1550 // If no inner class attribute found for this class.
1551 if (outer_klass.is_null()) return NULL;
1552
1553 // Throws an exception if outer klass has not declared k as an inner klass
1554 // We need evidence that each klass knows about the other, or else
1555 // the system could allow a spoof of an inner class to gain access rights.
1556 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1557 return outer_klass();
1558 }
1559
1560 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1561 assert (cls != NULL, "illegal class");
1562 JVMWrapper("JVM_GetClassSignature");
1563 JvmtiVMObjectAllocEventCollector oam;
1564 ResourceMark rm(THREAD);
1565 // Return null for arrays and primatives
1566 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1567 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1568 if (k->oop_is_instance()) {
1569 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1570 if (sym == NULL) return NULL;
1571 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1572 return (jstring) JNIHandles::make_local(env, str());
1573 }
1574 }
1575 return NULL;
1576 JVM_END
1577
1578
1579 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1580 assert (cls != NULL, "illegal class");
1581 JVMWrapper("JVM_GetClassAnnotations");
1582
1583 // Return null for arrays and primitives
1584 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1585 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1586 if (k->oop_is_instance()) {
1587 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1588 return (jbyteArray) JNIHandles::make_local(env, a);
1589 }
1590 }
1591 return NULL;
1592 JVM_END
1593
1594
1595 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1596 // some of this code was adapted from from jni_FromReflectedField
1597
1598 oop reflected = JNIHandles::resolve_non_null(field);
1599 oop mirror = java_lang_reflect_Field::clazz(reflected);
1600 Klass* k = java_lang_Class::as_Klass(mirror);
1601 int slot = java_lang_reflect_Field::slot(reflected);
1602 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1603
1604 KlassHandle kh(THREAD, k);
1605 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1606
1607 if (modifiers & JVM_ACC_STATIC) {
1608 // for static fields we only look in the current class
1609 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1610 assert(false, "cannot find static field");
1611 return false;
1612 }
1613 } else {
1614 // for instance fields we start with the current class and work
1615 // our way up through the superclass chain
1616 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1617 assert(false, "cannot find instance field");
1618 return false;
1619 }
1620 }
1621 return true;
1622 }
1623
1624 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1625 // field is a handle to a java.lang.reflect.Field object
1626 assert(field != NULL, "illegal field");
1627 JVMWrapper("JVM_GetFieldAnnotations");
1628
1629 fieldDescriptor fd;
1630 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1631 if (!gotFd) {
1632 return NULL;
1633 }
1634
1635 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1636 JVM_END
1637
1638
1639 static Method* jvm_get_method_common(jobject method) {
1640 // some of this code was adapted from from jni_FromReflectedMethod
1641
1642 oop reflected = JNIHandles::resolve_non_null(method);
1643 oop mirror = NULL;
1644 int slot = 0;
1645
1646 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1647 mirror = java_lang_reflect_Constructor::clazz(reflected);
1648 slot = java_lang_reflect_Constructor::slot(reflected);
1649 } else {
1650 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1651 "wrong type");
1652 mirror = java_lang_reflect_Method::clazz(reflected);
1653 slot = java_lang_reflect_Method::slot(reflected);
1654 }
1655 Klass* k = java_lang_Class::as_Klass(mirror);
1656
1657 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1658 assert(m != NULL, "cannot find method");
1659 return m; // caller has to deal with NULL in product mode
1660 }
1661
1662
1663 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1664 JVMWrapper("JVM_GetMethodAnnotations");
1665
1666 // method is a handle to a java.lang.reflect.Method object
1667 Method* m = jvm_get_method_common(method);
1668 if (m == NULL) {
1669 return NULL;
1670 }
1671
1672 return (jbyteArray) JNIHandles::make_local(env,
1673 Annotations::make_java_array(m->annotations(), THREAD));
1674 JVM_END
1675
1676
1677 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1678 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1679
1680 // method is a handle to a java.lang.reflect.Method object
1681 Method* m = jvm_get_method_common(method);
1682 if (m == NULL) {
1683 return NULL;
1684 }
1685
1686 return (jbyteArray) JNIHandles::make_local(env,
1687 Annotations::make_java_array(m->annotation_default(), THREAD));
1688 JVM_END
1689
1690
1691 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1692 JVMWrapper("JVM_GetMethodParameterAnnotations");
1693
1694 // method is a handle to a java.lang.reflect.Method object
1695 Method* m = jvm_get_method_common(method);
1696 if (m == NULL) {
1697 return NULL;
1698 }
1699
1700 return (jbyteArray) JNIHandles::make_local(env,
1701 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1702 JVM_END
1703
1704 /* Type use annotations support (JDK 1.8) */
1705
1706 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1707 assert (cls != NULL, "illegal class");
1708 JVMWrapper("JVM_GetClassTypeAnnotations");
1709 ResourceMark rm(THREAD);
1710 // Return null for arrays and primitives
1711 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1712 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1713 if (k->oop_is_instance()) {
1714 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1715 if (type_annotations != NULL) {
1716 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1717 return (jbyteArray) JNIHandles::make_local(env, a);
1718 }
1719 }
1720 }
1721 return NULL;
1722 JVM_END
1723
1724 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1725 assert (method != NULL, "illegal method");
1726 JVMWrapper("JVM_GetMethodTypeAnnotations");
1727
1728 // method is a handle to a java.lang.reflect.Method object
1729 Method* m = jvm_get_method_common(method);
1730 if (m == NULL) {
1731 return NULL;
1732 }
1733
1734 AnnotationArray* type_annotations = m->type_annotations();
1735 if (type_annotations != NULL) {
1736 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1737 return (jbyteArray) JNIHandles::make_local(env, a);
1738 }
1739
1740 return NULL;
1741 JVM_END
1742
1743 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1744 assert (field != NULL, "illegal field");
1745 JVMWrapper("JVM_GetFieldTypeAnnotations");
1746
1747 fieldDescriptor fd;
1748 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1749 if (!gotFd) {
1750 return NULL;
1751 }
1752
1753 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1754 JVM_END
1755
1756 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1757 if (!cp->is_within_bounds(index)) {
1758 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1759 }
1760 }
1761
1762 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1763 {
1764 JVMWrapper("JVM_GetMethodParameters");
1765 // method is a handle to a java.lang.reflect.Method object
1766 Method* method_ptr = jvm_get_method_common(method);
1767 methodHandle mh (THREAD, method_ptr);
1768 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1769 const int num_params = mh->method_parameters_length();
1770
1771 if (0 != num_params) {
1772 // make sure all the symbols are properly formatted
1773 for (int i = 0; i < num_params; i++) {
1774 MethodParametersElement* params = mh->method_parameters_start();
1775 int index = params[i].name_cp_index;
1776 bounds_check(mh->constants(), index, CHECK_NULL);
1777
1778 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1779 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1780 "Wrong type at constant pool index");
1781 }
1782
1783 }
1784
1785 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1786 objArrayHandle result (THREAD, result_oop);
1787
1788 for (int i = 0; i < num_params; i++) {
1789 MethodParametersElement* params = mh->method_parameters_start();
1790 // For a 0 index, give a NULL symbol
1791 Symbol* sym = 0 != params[i].name_cp_index ?
1792 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1793 int flags = params[i].flags;
1794 oop param = Reflection::new_parameter(reflected_method, i, sym,
1795 flags, CHECK_NULL);
1796 result->obj_at_put(i, param);
1797 }
1798 return (jobjectArray)JNIHandles::make_local(env, result());
1799 } else {
1800 return (jobjectArray)NULL;
1801 }
1802 }
1803 JVM_END
1804
1805 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1806
1807 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1808 {
1809 JVMWrapper("JVM_GetClassDeclaredFields");
1810 JvmtiVMObjectAllocEventCollector oam;
1811
1812 // Exclude primitive types and array types
1813 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1814 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1815 // Return empty array
1816 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1817 return (jobjectArray) JNIHandles::make_local(env, res);
1818 }
1819
1820 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1821 constantPoolHandle cp(THREAD, k->constants());
1822
1823 // Ensure class is linked
1824 k->link_class(CHECK_NULL);
1825
1826 // 4496456 We need to filter out java.lang.Throwable.backtrace
1827 bool skip_backtrace = false;
1828
1829 // Allocate result
1830 int num_fields;
1831
1832 if (publicOnly) {
1833 num_fields = 0;
1834 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1835 if (fs.access_flags().is_public()) ++num_fields;
1836 }
1837 } else {
1838 num_fields = k->java_fields_count();
1839
1840 if (k() == SystemDictionary::Throwable_klass()) {
1841 num_fields--;
1842 skip_backtrace = true;
1843 }
1844 }
1845
1846 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1847 objArrayHandle result (THREAD, r);
1848
1849 int out_idx = 0;
1850 fieldDescriptor fd;
1851 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1852 if (skip_backtrace) {
1853 // 4496456 skip java.lang.Throwable.backtrace
1854 int offset = fs.offset();
1855 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1856 }
1857
1858 if (!publicOnly || fs.access_flags().is_public()) {
1859 fd.reinitialize(k(), fs.index());
1860 oop field = Reflection::new_field(&fd, CHECK_NULL);
1861 result->obj_at_put(out_idx, field);
1862 ++out_idx;
1863 }
1864 }
1865 assert(out_idx == num_fields, "just checking");
1866 return (jobjectArray) JNIHandles::make_local(env, result());
1867 }
1868 JVM_END
1869
1870 static bool select_method(methodHandle method, bool want_constructor) {
1871 if (want_constructor) {
1872 return (method->is_initializer() && !method->is_static());
1873 } else {
1874 return (!method->is_initializer() && !method->is_overpass());
1875 }
1876 }
1877
1878 static jobjectArray get_class_declared_methods_helper(
1879 JNIEnv *env,
1880 jclass ofClass, jboolean publicOnly,
1881 bool want_constructor,
1882 Klass* klass, TRAPS) {
1883
1884 JvmtiVMObjectAllocEventCollector oam;
1885
1886 // Exclude primitive types and array types
1887 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1888 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1889 // Return empty array
1890 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1891 return (jobjectArray) JNIHandles::make_local(env, res);
1892 }
1893
1894 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1895
1896 // Ensure class is linked
1897 k->link_class(CHECK_NULL);
1898
1899 Array<Method*>* methods = k->methods();
1900 int methods_length = methods->length();
1901
1902 // Save original method_idnum in case of redefinition, which can change
1903 // the idnum of obsolete methods. The new method will have the same idnum
1904 // but if we refresh the methods array, the counts will be wrong.
1905 ResourceMark rm(THREAD);
1906 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1907 int num_methods = 0;
1908
1909 for (int i = 0; i < methods_length; i++) {
1910 methodHandle method(THREAD, methods->at(i));
1911 if (select_method(method, want_constructor)) {
1912 if (!publicOnly || method->is_public()) {
1913 idnums->push(method->method_idnum());
1914 ++num_methods;
1915 }
1916 }
1917 }
1918
1919 // Allocate result
1920 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1921 objArrayHandle result (THREAD, r);
1922
1923 // Now just put the methods that we selected above, but go by their idnum
1924 // in case of redefinition. The methods can be redefined at any safepoint,
1925 // so above when allocating the oop array and below when creating reflect
1926 // objects.
1927 for (int i = 0; i < num_methods; i++) {
1928 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1929 if (method.is_null()) {
1930 // Method may have been deleted and seems this API can handle null
1931 // Otherwise should probably put a method that throws NSME
1932 result->obj_at_put(i, NULL);
1933 } else {
1934 oop m;
1935 if (want_constructor) {
1936 m = Reflection::new_constructor(method, CHECK_NULL);
1937 } else {
1938 m = Reflection::new_method(method, false, CHECK_NULL);
1939 }
1940 result->obj_at_put(i, m);
1941 }
1942 }
1943
1944 return (jobjectArray) JNIHandles::make_local(env, result());
1945 }
1946
1947 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1948 {
1949 JVMWrapper("JVM_GetClassDeclaredMethods");
1950 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1951 /*want_constructor*/ false,
1952 SystemDictionary::reflect_Method_klass(), THREAD);
1953 }
1954 JVM_END
1955
1956 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1957 {
1958 JVMWrapper("JVM_GetClassDeclaredConstructors");
1959 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1960 /*want_constructor*/ true,
1961 SystemDictionary::reflect_Constructor_klass(), THREAD);
1962 }
1963 JVM_END
1964
1965 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1966 {
1967 JVMWrapper("JVM_GetClassAccessFlags");
1968 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1969 // Primitive type
1970 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1971 }
1972
1973 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1974 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1975 }
1976 JVM_END
1977
1978
1979 // Constant pool access //////////////////////////////////////////////////////////
1980
1981 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1982 {
1983 JVMWrapper("JVM_GetClassConstantPool");
1984 JvmtiVMObjectAllocEventCollector oam;
1985
1986 // Return null for primitives and arrays
1987 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1988 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1989 if (k->oop_is_instance()) {
1990 instanceKlassHandle k_h(THREAD, k);
1991 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1992 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1993 return JNIHandles::make_local(jcp());
1994 }
1995 }
1996 return NULL;
1997 }
1998 JVM_END
1999
2000
2001 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2002 {
2003 JVMWrapper("JVM_ConstantPoolGetSize");
2004 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2005 return cp->length();
2006 }
2007 JVM_END
2008
2009
2010 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2011 {
2012 JVMWrapper("JVM_ConstantPoolGetClassAt");
2013 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2014 bounds_check(cp, index, CHECK_NULL);
2015 constantTag tag = cp->tag_at(index);
2016 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2017 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2018 }
2019 Klass* k = cp->klass_at(index, CHECK_NULL);
2020 return (jclass) JNIHandles::make_local(k->java_mirror());
2021 }
2022 JVM_END
2023
2024 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2025 {
2026 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2027 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2028 bounds_check(cp, index, CHECK_NULL);
2029 constantTag tag = cp->tag_at(index);
2030 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2031 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2032 }
2033 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2034 if (k == NULL) return NULL;
2035 return (jclass) JNIHandles::make_local(k->java_mirror());
2036 }
2037 JVM_END
2038
2039 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2040 constantTag tag = cp->tag_at(index);
2041 if (!tag.is_method() && !tag.is_interface_method()) {
2042 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2043 }
2044 int klass_ref = cp->uncached_klass_ref_index_at(index);
2045 Klass* k_o;
2046 if (force_resolution) {
2047 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2048 } else {
2049 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2050 if (k_o == NULL) return NULL;
2051 }
2052 instanceKlassHandle k(THREAD, k_o);
2053 Symbol* name = cp->uncached_name_ref_at(index);
2054 Symbol* sig = cp->uncached_signature_ref_at(index);
2055 methodHandle m (THREAD, k->find_method(name, sig));
2056 if (m.is_null()) {
2057 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2058 }
2059 oop method;
2060 if (!m->is_initializer() || m->is_static()) {
2061 method = Reflection::new_method(m, true, CHECK_NULL);
2062 } else {
2063 method = Reflection::new_constructor(m, CHECK_NULL);
2064 }
2065 return JNIHandles::make_local(method);
2066 }
2067
2068 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2069 {
2070 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2071 JvmtiVMObjectAllocEventCollector oam;
2072 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073 bounds_check(cp, index, CHECK_NULL);
2074 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2075 return res;
2076 }
2077 JVM_END
2078
2079 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2080 {
2081 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2082 JvmtiVMObjectAllocEventCollector oam;
2083 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2084 bounds_check(cp, index, CHECK_NULL);
2085 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2086 return res;
2087 }
2088 JVM_END
2089
2090 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2091 constantTag tag = cp->tag_at(index);
2092 if (!tag.is_field()) {
2093 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2094 }
2095 int klass_ref = cp->uncached_klass_ref_index_at(index);
2096 Klass* k_o;
2097 if (force_resolution) {
2098 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2099 } else {
2100 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2101 if (k_o == NULL) return NULL;
2102 }
2103 instanceKlassHandle k(THREAD, k_o);
2104 Symbol* name = cp->uncached_name_ref_at(index);
2105 Symbol* sig = cp->uncached_signature_ref_at(index);
2106 fieldDescriptor fd;
2107 Klass* target_klass = k->find_field(name, sig, &fd);
2108 if (target_klass == NULL) {
2109 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2110 }
2111 oop field = Reflection::new_field(&fd, CHECK_NULL);
2112 return JNIHandles::make_local(field);
2113 }
2114
2115 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2118 JvmtiVMObjectAllocEventCollector oam;
2119 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_NULL);
2121 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2122 return res;
2123 }
2124 JVM_END
2125
2126 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2127 {
2128 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2129 JvmtiVMObjectAllocEventCollector oam;
2130 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2131 bounds_check(cp, index, CHECK_NULL);
2132 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2133 return res;
2134 }
2135 JVM_END
2136
2137 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2138 {
2139 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2140 JvmtiVMObjectAllocEventCollector oam;
2141 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2142 bounds_check(cp, index, CHECK_NULL);
2143 constantTag tag = cp->tag_at(index);
2144 if (!tag.is_field_or_method()) {
2145 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2146 }
2147 int klass_ref = cp->uncached_klass_ref_index_at(index);
2148 Symbol* klass_name = cp->klass_name_at(klass_ref);
2149 Symbol* member_name = cp->uncached_name_ref_at(index);
2150 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2151 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2152 objArrayHandle dest(THREAD, dest_o);
2153 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2154 dest->obj_at_put(0, str());
2155 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2156 dest->obj_at_put(1, str());
2157 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2158 dest->obj_at_put(2, str());
2159 return (jobjectArray) JNIHandles::make_local(dest());
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2164 {
2165 JVMWrapper("JVM_ConstantPoolGetIntAt");
2166 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2167 bounds_check(cp, index, CHECK_0);
2168 constantTag tag = cp->tag_at(index);
2169 if (!tag.is_int()) {
2170 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2171 }
2172 return cp->int_at(index);
2173 }
2174 JVM_END
2175
2176 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2177 {
2178 JVMWrapper("JVM_ConstantPoolGetLongAt");
2179 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_(0L));
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_long()) {
2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 return cp->long_at(index);
2186 }
2187 JVM_END
2188
2189 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2190 {
2191 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2192 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2193 bounds_check(cp, index, CHECK_(0.0f));
2194 constantTag tag = cp->tag_at(index);
2195 if (!tag.is_float()) {
2196 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2197 }
2198 return cp->float_at(index);
2199 }
2200 JVM_END
2201
2202 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2203 {
2204 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2205 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2206 bounds_check(cp, index, CHECK_(0.0));
2207 constantTag tag = cp->tag_at(index);
2208 if (!tag.is_double()) {
2209 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2210 }
2211 return cp->double_at(index);
2212 }
2213 JVM_END
2214
2215 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2216 {
2217 JVMWrapper("JVM_ConstantPoolGetStringAt");
2218 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2219 bounds_check(cp, index, CHECK_NULL);
2220 constantTag tag = cp->tag_at(index);
2221 if (!tag.is_string()) {
2222 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2223 }
2224 oop str = cp->string_at(index, CHECK_NULL);
2225 return (jstring) JNIHandles::make_local(str);
2226 }
2227 JVM_END
2228
2229 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2230 {
2231 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2232 JvmtiVMObjectAllocEventCollector oam;
2233 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2234 bounds_check(cp, index, CHECK_NULL);
2235 constantTag tag = cp->tag_at(index);
2236 if (!tag.is_symbol()) {
2237 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2238 }
2239 Symbol* sym = cp->symbol_at(index);
2240 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2241 return (jstring) JNIHandles::make_local(str());
2242 }
2243 JVM_END
2244
2245
2246 // Assertion support. //////////////////////////////////////////////////////////
2247
2248 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2249 JVMWrapper("JVM_DesiredAssertionStatus");
2250 assert(cls != NULL, "bad class");
2251
2252 oop r = JNIHandles::resolve(cls);
2253 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2254 if (java_lang_Class::is_primitive(r)) return false;
2255
2256 Klass* k = java_lang_Class::as_Klass(r);
2257 assert(k->oop_is_instance(), "must be an instance klass");
2258 if (! k->oop_is_instance()) return false;
2259
2260 ResourceMark rm(THREAD);
2261 const char* name = k->name()->as_C_string();
2262 bool system_class = k->class_loader() == NULL;
2263 return JavaAssertions::enabled(name, system_class);
2264
2265 JVM_END
2266
2267
2268 // Return a new AssertionStatusDirectives object with the fields filled in with
2269 // command-line assertion arguments (i.e., -ea, -da).
2270 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2271 JVMWrapper("JVM_AssertionStatusDirectives");
2272 JvmtiVMObjectAllocEventCollector oam;
2273 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2274 return JNIHandles::make_local(env, asd);
2275 JVM_END
2276
2277 // Verification ////////////////////////////////////////////////////////////////////////////////
2278
2279 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2280
2281 // RedefineClasses support: bug 6214132 caused verification to fail.
2282 // All functions from this section should call the jvmtiThreadSate function:
2283 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2284 // The function returns a Klass* of the _scratch_class if the verifier
2285 // was invoked in the middle of the class redefinition.
2286 // Otherwise it returns its argument value which is the _the_class Klass*.
2287 // Please, refer to the description in the jvmtiThreadSate.hpp.
2288
2289 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2290 JVMWrapper("JVM_GetClassNameUTF");
2291 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2293 return k->name()->as_utf8();
2294 JVM_END
2295
2296
2297 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2298 JVMWrapper("JVM_GetClassCPTypes");
2299 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2300 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2301 // types will have length zero if this is not an InstanceKlass
2302 // (length is determined by call to JVM_GetClassCPEntriesCount)
2303 if (k->oop_is_instance()) {
2304 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2305 for (int index = cp->length() - 1; index >= 0; index--) {
2306 constantTag tag = cp->tag_at(index);
2307 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2308 }
2309 }
2310 JVM_END
2311
2312
2313 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2314 JVMWrapper("JVM_GetClassCPEntriesCount");
2315 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2316 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2317 if (!k->oop_is_instance())
2318 return 0;
2319 return InstanceKlass::cast(k)->constants()->length();
2320 JVM_END
2321
2322
2323 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2324 JVMWrapper("JVM_GetClassFieldsCount");
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 if (!k->oop_is_instance())
2328 return 0;
2329 return InstanceKlass::cast(k)->java_fields_count();
2330 JVM_END
2331
2332
2333 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2334 JVMWrapper("JVM_GetClassMethodsCount");
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 if (!k->oop_is_instance())
2338 return 0;
2339 return InstanceKlass::cast(k)->methods()->length();
2340 JVM_END
2341
2342
2343 // The following methods, used for the verifier, are never called with
2344 // array klasses, so a direct cast to InstanceKlass is safe.
2345 // Typically, these methods are called in a loop with bounds determined
2346 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2347 // zero for arrays.
2348 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2349 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2353 int length = method->checked_exceptions_length();
2354 if (length > 0) {
2355 CheckedExceptionElement* table= method->checked_exceptions_start();
2356 for (int i = 0; i < length; i++) {
2357 exceptions[i] = table[i].class_cp_index;
2358 }
2359 }
2360 JVM_END
2361
2362
2363 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2364 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2365 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2368 return method->checked_exceptions_length();
2369 JVM_END
2370
2371
2372 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2373 JVMWrapper("JVM_GetMethodIxByteCode");
2374 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2377 memcpy(code, method->code_base(), method->code_size());
2378 JVM_END
2379
2380
2381 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2382 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2384 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2385 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2386 return method->code_size();
2387 JVM_END
2388
2389
2390 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2391 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2395 ExceptionTable extable(method);
2396 entry->start_pc = extable.start_pc(entry_index);
2397 entry->end_pc = extable.end_pc(entry_index);
2398 entry->handler_pc = extable.handler_pc(entry_index);
2399 entry->catchType = extable.catch_type_index(entry_index);
2400 JVM_END
2401
2402
2403 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2404 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408 return method->exception_table_length();
2409 JVM_END
2410
2411
2412 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2413 JVMWrapper("JVM_GetMethodIxModifiers");
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2418 JVM_END
2419
2420
2421 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2422 JVMWrapper("JVM_GetFieldIxModifiers");
2423 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2424 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2425 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2426 JVM_END
2427
2428
2429 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2430 JVMWrapper("JVM_GetMethodIxLocalsCount");
2431 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2432 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2433 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2434 return method->max_locals();
2435 JVM_END
2436
2437
2438 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2439 JVMWrapper("JVM_GetMethodIxArgsSize");
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2443 return method->size_of_parameters();
2444 JVM_END
2445
2446
2447 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2448 JVMWrapper("JVM_GetMethodIxMaxStack");
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->verifier_max_stack();
2453 JVM_END
2454
2455
2456 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2457 JVMWrapper("JVM_IsConstructorIx");
2458 ResourceMark rm(THREAD);
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 return method->name() == vmSymbols::object_initializer_name();
2463 JVM_END
2464
2465
2466 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2467 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2468 ResourceMark rm(THREAD);
2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2471 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2472 return method->is_overpass();
2473 JVM_END
2474
2475 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2476 JVMWrapper("JVM_GetMethodIxIxUTF");
2477 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2478 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2479 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2480 return method->name()->as_utf8();
2481 JVM_END
2482
2483
2484 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2485 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2486 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2487 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2488 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2489 return method->signature()->as_utf8();
2490 JVM_END
2491
2492 /**
2493 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2494 * read entries in the constant pool. Since the old verifier always
2495 * works on a copy of the code, it will not see any rewriting that
2496 * may possibly occur in the middle of verification. So it is important
2497 * that nothing it calls tries to use the cpCache instead of the raw
2498 * constant pool, so we must use cp->uncached_x methods when appropriate.
2499 */
2500 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2501 JVMWrapper("JVM_GetCPFieldNameUTF");
2502 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2503 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2504 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2505 switch (cp->tag_at(cp_index).value()) {
2506 case JVM_CONSTANT_Fieldref:
2507 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2508 default:
2509 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2510 }
2511 ShouldNotReachHere();
2512 return NULL;
2513 JVM_END
2514
2515
2516 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2517 JVMWrapper("JVM_GetCPMethodNameUTF");
2518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2519 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2520 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_InterfaceMethodref:
2523 case JVM_CONSTANT_Methodref:
2524 case JVM_CONSTANT_NameAndType: // for invokedynamic
2525 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2526 default:
2527 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2528 }
2529 ShouldNotReachHere();
2530 return NULL;
2531 JVM_END
2532
2533
2534 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2535 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2536 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2538 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2539 switch (cp->tag_at(cp_index).value()) {
2540 case JVM_CONSTANT_InterfaceMethodref:
2541 case JVM_CONSTANT_Methodref:
2542 case JVM_CONSTANT_NameAndType: // for invokedynamic
2543 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2544 default:
2545 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2546 }
2547 ShouldNotReachHere();
2548 return NULL;
2549 JVM_END
2550
2551
2552 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2553 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2556 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2557 switch (cp->tag_at(cp_index).value()) {
2558 case JVM_CONSTANT_Fieldref:
2559 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2560 default:
2561 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2562 }
2563 ShouldNotReachHere();
2564 return NULL;
2565 JVM_END
2566
2567
2568 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2569 JVMWrapper("JVM_GetCPClassNameUTF");
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2573 Symbol* classname = cp->klass_name_at(cp_index);
2574 return classname->as_utf8();
2575 JVM_END
2576
2577
2578 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2579 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2580 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2581 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2582 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2583 switch (cp->tag_at(cp_index).value()) {
2584 case JVM_CONSTANT_Fieldref: {
2585 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2586 Symbol* classname = cp->klass_name_at(class_index);
2587 return classname->as_utf8();
2588 }
2589 default:
2590 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2591 }
2592 ShouldNotReachHere();
2593 return NULL;
2594 JVM_END
2595
2596
2597 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2598 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2599 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2600 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2601 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2602 switch (cp->tag_at(cp_index).value()) {
2603 case JVM_CONSTANT_Methodref:
2604 case JVM_CONSTANT_InterfaceMethodref: {
2605 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2606 Symbol* classname = cp->klass_name_at(class_index);
2607 return classname->as_utf8();
2608 }
2609 default:
2610 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2611 }
2612 ShouldNotReachHere();
2613 return NULL;
2614 JVM_END
2615
2616
2617 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2618 JVMWrapper("JVM_GetCPFieldModifiers");
2619 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2620 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2621 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2622 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2623 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2624 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2625 switch (cp->tag_at(cp_index).value()) {
2626 case JVM_CONSTANT_Fieldref: {
2627 Symbol* name = cp->uncached_name_ref_at(cp_index);
2628 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2629 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2630 if (fs.name() == name && fs.signature() == signature) {
2631 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2632 }
2633 }
2634 return -1;
2635 }
2636 default:
2637 fatal("JVM_GetCPFieldModifiers: illegal constant");
2638 }
2639 ShouldNotReachHere();
2640 return 0;
2641 JVM_END
2642
2643
2644 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2645 JVMWrapper("JVM_GetCPMethodModifiers");
2646 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2647 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2648 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2649 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2650 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2651 switch (cp->tag_at(cp_index).value()) {
2652 case JVM_CONSTANT_Methodref:
2653 case JVM_CONSTANT_InterfaceMethodref: {
2654 Symbol* name = cp->uncached_name_ref_at(cp_index);
2655 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2656 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2657 int methods_count = methods->length();
2658 for (int i = 0; i < methods_count; i++) {
2659 Method* method = methods->at(i);
2660 if (method->name() == name && method->signature() == signature) {
2661 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2662 }
2663 }
2664 return -1;
2665 }
2666 default:
2667 fatal("JVM_GetCPMethodModifiers: illegal constant");
2668 }
2669 ShouldNotReachHere();
2670 return 0;
2671 JVM_END
2672
2673
2674 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2675
2676 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2677 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2678 JVM_END
2679
2680
2681 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2682 JVMWrapper("JVM_IsSameClassPackage");
2683 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2684 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2685 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2686 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2687 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2688 JVM_END
2689
2690
2691 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2692
2693 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2694 JVMWrapper2("JVM_Open (%s)", fname);
2695
2696 //%note jvm_r6
2697 int result = os::open(fname, flags, mode);
2698 if (result >= 0) {
2699 return result;
2700 } else {
2701 switch(errno) {
2702 case EEXIST:
2703 return JVM_EEXIST;
2704 default:
2705 return -1;
2706 }
2707 }
2708 JVM_END
2709
2710
2711 JVM_LEAF(jint, JVM_Close(jint fd))
2712 JVMWrapper2("JVM_Close (0x%x)", fd);
2713 //%note jvm_r6
2714 return os::close(fd);
2715 JVM_END
2716
2717
2718 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2719 JVMWrapper2("JVM_Read (0x%x)", fd);
2720
2721 //%note jvm_r6
2722 return (jint)os::restartable_read(fd, buf, nbytes);
2723 JVM_END
2724
2725
2726 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2727 JVMWrapper2("JVM_Write (0x%x)", fd);
2728
2729 //%note jvm_r6
2730 return (jint)os::write(fd, buf, nbytes);
2731 JVM_END
2732
2733
2734 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2735 JVMWrapper2("JVM_Available (0x%x)", fd);
2736 //%note jvm_r6
2737 return os::available(fd, pbytes);
2738 JVM_END
2739
2740
2741 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2742 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2743 //%note jvm_r6
2744 return os::lseek(fd, offset, whence);
2745 JVM_END
2746
2747
2748 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2749 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2750 return os::ftruncate(fd, length);
2751 JVM_END
2752
2753
2754 JVM_LEAF(jint, JVM_Sync(jint fd))
2755 JVMWrapper2("JVM_Sync (0x%x)", fd);
2756 //%note jvm_r6
2757 return os::fsync(fd);
2758 JVM_END
2759
2760
2761 // Printing support //////////////////////////////////////////////////
2762 extern "C" {
2763
2764 ATTRIBUTE_PRINTF(3, 0)
2765 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2766 // see bug 4399518, 4417214
2767 if ((intptr_t)count <= 0) return -1;
2768 return vsnprintf(str, count, fmt, args);
2769 }
2770
2771 ATTRIBUTE_PRINTF(3, 0)
2772 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2773 va_list args;
2774 int len;
2775 va_start(args, fmt);
2776 len = jio_vsnprintf(str, count, fmt, args);
2777 va_end(args);
2778 return len;
2779 }
2780
2781 ATTRIBUTE_PRINTF(2,3)
2782 int jio_fprintf(FILE* f, const char *fmt, ...) {
2783 int len;
2784 va_list args;
2785 va_start(args, fmt);
2786 len = jio_vfprintf(f, fmt, args);
2787 va_end(args);
2788 return len;
2789 }
2790
2791 ATTRIBUTE_PRINTF(2, 0)
2792 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2793 if (Arguments::vfprintf_hook() != NULL) {
2794 return Arguments::vfprintf_hook()(f, fmt, args);
2795 } else {
2796 return vfprintf(f, fmt, args);
2797 }
2798 }
2799
2800 ATTRIBUTE_PRINTF(1, 2)
2801 JNIEXPORT int jio_printf(const char *fmt, ...) {
2802 int len;
2803 va_list args;
2804 va_start(args, fmt);
2805 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2806 va_end(args);
2807 return len;
2808 }
2809
2810
2811 // HotSpot specific jio method
2812 void jio_print(const char* s) {
2813 // Try to make this function as atomic as possible.
2814 if (Arguments::vfprintf_hook() != NULL) {
2815 jio_fprintf(defaultStream::output_stream(), "%s", s);
2816 } else {
2817 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2818 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2819 }
2820 }
2821
2822 } // Extern C
2823
2824 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2825
2826 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2827 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2828 // OSThread objects. The exception to this rule is when the target object is the thread
2829 // doing the operation, in which case we know that the thread won't exit until the
2830 // operation is done (all exits being voluntary). There are a few cases where it is
2831 // rather silly to do operations on yourself, like resuming yourself or asking whether
2832 // you are alive. While these can still happen, they are not subject to deadlocks if
2833 // the lock is held while the operation occurs (this is not the case for suspend, for
2834 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2835 // implementation is local to this file, we always lock Threads_lock for that one.
2836
2837 static void thread_entry(JavaThread* thread, TRAPS) {
2838 HandleMark hm(THREAD);
2839 Handle obj(THREAD, thread->threadObj());
2840 JavaValue result(T_VOID);
2841 JavaCalls::call_virtual(&result,
2842 obj,
2843 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2844 vmSymbols::run_method_name(),
2845 vmSymbols::void_method_signature(),
2846 THREAD);
2847 }
2848
2849
2850 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2851 JVMWrapper("JVM_StartThread");
2852 JavaThread *native_thread = NULL;
2853
2854 // We cannot hold the Threads_lock when we throw an exception,
2855 // due to rank ordering issues. Example: we might need to grab the
2856 // Heap_lock while we construct the exception.
2857 bool throw_illegal_thread_state = false;
2858
2859 // We must release the Threads_lock before we can post a jvmti event
2860 // in Thread::start.
2861 {
2862 // Ensure that the C++ Thread and OSThread structures aren't freed before
2863 // we operate.
2864 MutexLocker mu(Threads_lock);
2865
2866 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2867 // re-starting an already started thread, so we should usually find
2868 // that the JavaThread is null. However for a JNI attached thread
2869 // there is a small window between the Thread object being created
2870 // (with its JavaThread set) and the update to its threadStatus, so we
2871 // have to check for this
2872 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2873 throw_illegal_thread_state = true;
2874 } else {
2875 // We could also check the stillborn flag to see if this thread was already stopped, but
2876 // for historical reasons we let the thread detect that itself when it starts running
2877
2878 jlong size =
2879 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2880 // Allocate the C++ Thread structure and create the native thread. The
2881 // stack size retrieved from java is signed, but the constructor takes
2882 // size_t (an unsigned type), so avoid passing negative values which would
2883 // result in really large stacks.
2884 size_t sz = size > 0 ? (size_t) size : 0;
2885 native_thread = new JavaThread(&thread_entry, sz);
2886
2887 // At this point it may be possible that no osthread was created for the
2888 // JavaThread due to lack of memory. Check for this situation and throw
2889 // an exception if necessary. Eventually we may want to change this so
2890 // that we only grab the lock if the thread was created successfully -
2891 // then we can also do this check and throw the exception in the
2892 // JavaThread constructor.
2893 if (native_thread->osthread() != NULL) {
2894 // Note: the current thread is not being used within "prepare".
2895 native_thread->prepare(jthread);
2896 }
2897 }
2898 }
2899
2900 if (throw_illegal_thread_state) {
2901 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2902 }
2903
2904 assert(native_thread != NULL, "Starting null thread?");
2905
2906 if (native_thread->osthread() == NULL) {
2907 // No one should hold a reference to the 'native_thread'.
2908 delete native_thread;
2909 if (JvmtiExport::should_post_resource_exhausted()) {
2910 JvmtiExport::post_resource_exhausted(
2911 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2912 os::native_thread_creation_failed_msg());
2913 }
2914 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2915 os::native_thread_creation_failed_msg());
2916 }
2917
2918 Thread::start(native_thread);
2919
2920 JVM_END
2921
2922 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2923 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2924 // but is thought to be reliable and simple. In the case, where the receiver is the
2925 // same thread as the sender, no safepoint is needed.
2926 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2927 JVMWrapper("JVM_StopThread");
2928
2929 oop java_throwable = JNIHandles::resolve(throwable);
2930 if (java_throwable == NULL) {
2931 THROW(vmSymbols::java_lang_NullPointerException());
2932 }
2933 oop java_thread = JNIHandles::resolve_non_null(jthread);
2934 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2935 Events::log_exception(JavaThread::current(),
2936 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2937 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2938 // First check if thread is alive
2939 if (receiver != NULL) {
2940 // Check if exception is getting thrown at self (use oop equality, since the
2941 // target object might exit)
2942 if (java_thread == thread->threadObj()) {
2943 THROW_OOP(java_throwable);
2944 } else {
2945 // Enques a VM_Operation to stop all threads and then deliver the exception...
2946 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2947 }
2948 }
2949 else {
2950 // Either:
2951 // - target thread has not been started before being stopped, or
2952 // - target thread already terminated
2953 // We could read the threadStatus to determine which case it is
2954 // but that is overkill as it doesn't matter. We must set the
2955 // stillborn flag for the first case, and if the thread has already
2956 // exited setting this flag has no affect
2957 java_lang_Thread::set_stillborn(java_thread);
2958 }
2959 JVM_END
2960
2961
2962 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2963 JVMWrapper("JVM_IsThreadAlive");
2964
2965 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2966 return java_lang_Thread::is_alive(thread_oop);
2967 JVM_END
2968
2969
2970 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2971 JVMWrapper("JVM_SuspendThread");
2972 oop java_thread = JNIHandles::resolve_non_null(jthread);
2973 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2974
2975 if (receiver != NULL) {
2976 // thread has run and has not exited (still on threads list)
2977
2978 {
2979 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2980 if (receiver->is_external_suspend()) {
2981 // Don't allow nested external suspend requests. We can't return
2982 // an error from this interface so just ignore the problem.
2983 return;
2984 }
2985 if (receiver->is_exiting()) { // thread is in the process of exiting
2986 return;
2987 }
2988 receiver->set_external_suspend();
2989 }
2990
2991 // java_suspend() will catch threads in the process of exiting
2992 // and will ignore them.
2993 receiver->java_suspend();
2994
2995 // It would be nice to have the following assertion in all the
2996 // time, but it is possible for a racing resume request to have
2997 // resumed this thread right after we suspended it. Temporarily
2998 // enable this assertion if you are chasing a different kind of
2999 // bug.
3000 //
3001 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3002 // receiver->is_being_ext_suspended(), "thread is not suspended");
3003 }
3004 JVM_END
3005
3006
3007 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3008 JVMWrapper("JVM_ResumeThread");
3009 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3010 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3011 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3012 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3013 // looks at it.
3014 MutexLocker ml(Threads_lock);
3015 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3016 if (thr != NULL) {
3017 // the thread has run and is not in the process of exiting
3018 thr->java_resume();
3019 }
3020 JVM_END
3021
3022
3023 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3024 JVMWrapper("JVM_SetThreadPriority");
3025 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3026 MutexLocker ml(Threads_lock);
3027 oop java_thread = JNIHandles::resolve_non_null(jthread);
3028 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3029 JavaThread* thr = java_lang_Thread::thread(java_thread);
3030 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3031 Thread::set_priority(thr, (ThreadPriority)prio);
3032 }
3033 JVM_END
3034
3035
3036 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3037 JVMWrapper("JVM_Yield");
3038 if (os::dont_yield()) return;
3039 HOTSPOT_THREAD_YIELD();
3040
3041 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3042 // Critical for similar threading behaviour
3043 if (ConvertYieldToSleep) {
3044 os::sleep(thread, MinSleepInterval, false);
3045 } else {
3046 os::naked_yield();
3047 }
3048 JVM_END
3049
3050
3051 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3052 JVMWrapper("JVM_Sleep");
3053
3054 if (millis < 0) {
3055 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3056 }
3057
3058 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3059 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3060 }
3061
3062 // Save current thread state and restore it at the end of this block.
3063 // And set new thread state to SLEEPING.
3064 JavaThreadSleepState jtss(thread);
3065
3066 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3067
3068 EventThreadSleep event;
3069
3070 if (millis == 0) {
3071 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3072 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3073 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3074 // for SOLARIS
3075 if (ConvertSleepToYield) {
3076 os::naked_yield();
3077 } else {
3078 ThreadState old_state = thread->osthread()->get_state();
3079 thread->osthread()->set_state(SLEEPING);
3080 os::sleep(thread, MinSleepInterval, false);
3081 thread->osthread()->set_state(old_state);
3082 }
3083 } else {
3084 ThreadState old_state = thread->osthread()->get_state();
3085 thread->osthread()->set_state(SLEEPING);
3086 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3087 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3088 // us while we were sleeping. We do not overwrite those.
3089 if (!HAS_PENDING_EXCEPTION) {
3090 if (event.should_commit()) {
3091 event.set_time(millis);
3092 event.commit();
3093 }
3094 HOTSPOT_THREAD_SLEEP_END(1);
3095
3096 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3097 // to properly restore the thread state. That's likely wrong.
3098 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3099 }
3100 }
3101 thread->osthread()->set_state(old_state);
3102 }
3103 if (event.should_commit()) {
3104 event.set_time(millis);
3105 event.commit();
3106 }
3107 HOTSPOT_THREAD_SLEEP_END(0);
3108 JVM_END
3109
3110 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3111 JVMWrapper("JVM_CurrentThread");
3112 oop jthread = thread->threadObj();
3113 assert (thread != NULL, "no current thread!");
3114 return JNIHandles::make_local(env, jthread);
3115 JVM_END
3116
3117
3118 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3119 JVMWrapper("JVM_CountStackFrames");
3120
3121 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3122 oop java_thread = JNIHandles::resolve_non_null(jthread);
3123 bool throw_illegal_thread_state = false;
3124 int count = 0;
3125
3126 {
3127 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3128 // We need to re-resolve the java_thread, since a GC might have happened during the
3129 // acquire of the lock
3130 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3131
3132 if (thr == NULL) {
3133 // do nothing
3134 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3135 // Check whether this java thread has been suspended already. If not, throws
3136 // IllegalThreadStateException. We defer to throw that exception until
3137 // Threads_lock is released since loading exception class has to leave VM.
3138 // The correct way to test a thread is actually suspended is
3139 // wait_for_ext_suspend_completion(), but we can't call that while holding
3140 // the Threads_lock. The above tests are sufficient for our purposes
3141 // provided the walkability of the stack is stable - which it isn't
3142 // 100% but close enough for most practical purposes.
3143 throw_illegal_thread_state = true;
3144 } else {
3145 // Count all java activation, i.e., number of vframes
3146 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3147 // Native frames are not counted
3148 if (!vfst.method()->is_native()) count++;
3149 }
3150 }
3151 }
3152
3153 if (throw_illegal_thread_state) {
3154 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3155 "this thread is not suspended");
3156 }
3157 return count;
3158 JVM_END
3159
3160 // Consider: A better way to implement JVM_Interrupt() is to acquire
3161 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3162 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3163 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3164 // outside the critical section. Threads_lock is hot so we want to minimize
3165 // the hold-time. A cleaner interface would be to decompose interrupt into
3166 // two steps. The 1st phase, performed under Threads_lock, would return
3167 // a closure that'd be invoked after Threads_lock was dropped.
3168 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3169 // admit spurious wakeups.
3170
3171 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3172 JVMWrapper("JVM_Interrupt");
3173
3174 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3175 oop java_thread = JNIHandles::resolve_non_null(jthread);
3176 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3177 // We need to re-resolve the java_thread, since a GC might have happened during the
3178 // acquire of the lock
3179 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3180 if (thr != NULL) {
3181 Thread::interrupt(thr);
3182 }
3183 JVM_END
3184
3185
3186 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3187 JVMWrapper("JVM_IsInterrupted");
3188
3189 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3190 oop java_thread = JNIHandles::resolve_non_null(jthread);
3191 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3192 // We need to re-resolve the java_thread, since a GC might have happened during the
3193 // acquire of the lock
3194 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3195 if (thr == NULL) {
3196 return JNI_FALSE;
3197 } else {
3198 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3199 }
3200 JVM_END
3201
3202
3203 // Return true iff the current thread has locked the object passed in
3204
3205 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3206 JVMWrapper("JVM_HoldsLock");
3207 assert(THREAD->is_Java_thread(), "sanity check");
3208 if (obj == NULL) {
3209 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3210 }
3211 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3212 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3213 JVM_END
3214
3215
3216 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3217 JVMWrapper("JVM_DumpAllStacks");
3218 VM_PrintThreads op;
3219 VMThread::execute(&op);
3220 if (JvmtiExport::should_post_data_dump()) {
3221 JvmtiExport::post_data_dump();
3222 }
3223 JVM_END
3224
3225 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3226 JVMWrapper("JVM_SetNativeThreadName");
3227 ResourceMark rm(THREAD);
3228 oop java_thread = JNIHandles::resolve_non_null(jthread);
3229 JavaThread* thr = java_lang_Thread::thread(java_thread);
3230 // Thread naming only supported for the current thread, doesn't work for
3231 // target threads.
3232 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3233 // we don't set the name of an attached thread to avoid stepping
3234 // on other programs
3235 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3236 os::set_native_thread_name(thread_name);
3237 }
3238 JVM_END
3239
3240 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3241
3242 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3243 assert(jthread->is_Java_thread(), "must be a Java thread");
3244 if (jthread->privileged_stack_top() == NULL) return false;
3245 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3246 oop loader = jthread->privileged_stack_top()->class_loader();
3247 if (loader == NULL) return true;
3248 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3249 if (trusted) return true;
3250 }
3251 return false;
3252 }
3253
3254 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3255 JVMWrapper("JVM_CurrentLoadedClass");
3256 ResourceMark rm(THREAD);
3257
3258 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3259 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3260 bool trusted = is_trusted_frame(thread, &vfst);
3261 if (trusted) return NULL;
3262
3263 Method* m = vfst.method();
3264 if (!m->is_native()) {
3265 InstanceKlass* holder = m->method_holder();
3266 oop loader = holder->class_loader();
3267 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3268 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3269 }
3270 }
3271 }
3272 return NULL;
3273 JVM_END
3274
3275
3276 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3277 JVMWrapper("JVM_CurrentClassLoader");
3278 ResourceMark rm(THREAD);
3279
3280 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3281
3282 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3283 bool trusted = is_trusted_frame(thread, &vfst);
3284 if (trusted) return NULL;
3285
3286 Method* m = vfst.method();
3287 if (!m->is_native()) {
3288 InstanceKlass* holder = m->method_holder();
3289 assert(holder->is_klass(), "just checking");
3290 oop loader = holder->class_loader();
3291 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3292 return JNIHandles::make_local(env, loader);
3293 }
3294 }
3295 }
3296 return NULL;
3297 JVM_END
3298
3299
3300 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3301 JVMWrapper("JVM_GetClassContext");
3302 ResourceMark rm(THREAD);
3303 JvmtiVMObjectAllocEventCollector oam;
3304 vframeStream vfst(thread);
3305
3306 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3307 // This must only be called from SecurityManager.getClassContext
3308 Method* m = vfst.method();
3309 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3310 m->name() == vmSymbols::getClassContext_name() &&
3311 m->signature() == vmSymbols::void_class_array_signature())) {
3312 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3313 }
3314 }
3315
3316 // Collect method holders
3317 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3318 for (; !vfst.at_end(); vfst.security_next()) {
3319 Method* m = vfst.method();
3320 // Native frames are not returned
3321 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3322 Klass* holder = m->method_holder();
3323 assert(holder->is_klass(), "just checking");
3324 klass_array->append(holder);
3325 }
3326 }
3327
3328 // Create result array of type [Ljava/lang/Class;
3329 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3330 // Fill in mirrors corresponding to method holders
3331 for (int i = 0; i < klass_array->length(); i++) {
3332 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3333 }
3334
3335 return (jobjectArray) JNIHandles::make_local(env, result);
3336 JVM_END
3337
3338
3339 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3340 JVMWrapper("JVM_ClassDepth");
3341 ResourceMark rm(THREAD);
3342 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3343 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3344
3345 const char* str = java_lang_String::as_utf8_string(class_name_str());
3346 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3347 if (class_name_sym == NULL) {
3348 return -1;
3349 }
3350
3351 int depth = 0;
3352
3353 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3354 if (!vfst.method()->is_native()) {
3355 InstanceKlass* holder = vfst.method()->method_holder();
3356 assert(holder->is_klass(), "just checking");
3357 if (holder->name() == class_name_sym) {
3358 return depth;
3359 }
3360 depth++;
3361 }
3362 }
3363 return -1;
3364 JVM_END
3365
3366
3367 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3368 JVMWrapper("JVM_ClassLoaderDepth");
3369 ResourceMark rm(THREAD);
3370 int depth = 0;
3371 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3372 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3373 bool trusted = is_trusted_frame(thread, &vfst);
3374 if (trusted) return -1;
3375
3376 Method* m = vfst.method();
3377 if (!m->is_native()) {
3378 InstanceKlass* holder = m->method_holder();
3379 assert(holder->is_klass(), "just checking");
3380 oop loader = holder->class_loader();
3381 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3382 return depth;
3383 }
3384 depth++;
3385 }
3386 }
3387 return -1;
3388 JVM_END
3389
3390
3391 // java.lang.Package ////////////////////////////////////////////////////////////////
3392
3393
3394 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3395 JVMWrapper("JVM_GetSystemPackage");
3396 ResourceMark rm(THREAD);
3397 JvmtiVMObjectAllocEventCollector oam;
3398 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3399 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3400 return (jstring) JNIHandles::make_local(result);
3401 JVM_END
3402
3403
3404 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3405 JVMWrapper("JVM_GetSystemPackages");
3406 JvmtiVMObjectAllocEventCollector oam;
3407 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3408 return (jobjectArray) JNIHandles::make_local(result);
3409 JVM_END
3410
3411
3412 // ObjectInputStream ///////////////////////////////////////////////////////////////
3413
3414 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3415 if (current_class == NULL) {
3416 return true;
3417 }
3418 if ((current_class == field_class) || access.is_public()) {
3419 return true;
3420 }
3421
3422 if (access.is_protected()) {
3423 // See if current_class is a subclass of field_class
3424 if (current_class->is_subclass_of(field_class)) {
3425 return true;
3426 }
3427 }
3428
3429 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3430 }
3431
3432
3433 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3434 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3435 JVMWrapper("JVM_AllocateNewObject");
3436 JvmtiVMObjectAllocEventCollector oam;
3437 // Receiver is not used
3438 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3439 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3440
3441 // Cannot instantiate primitive types
3442 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3443 ResourceMark rm(THREAD);
3444 THROW_0(vmSymbols::java_lang_InvalidClassException());
3445 }
3446
3447 // Arrays not allowed here, must use JVM_AllocateNewArray
3448 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3449 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3450 ResourceMark rm(THREAD);
3451 THROW_0(vmSymbols::java_lang_InvalidClassException());
3452 }
3453
3454 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3455 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3456
3457 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3458
3459 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3460 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3461
3462 // Make sure klass is initialized, since we are about to instantiate one of them.
3463 curr_klass->initialize(CHECK_NULL);
3464
3465 methodHandle m (THREAD,
3466 init_klass->find_method(vmSymbols::object_initializer_name(),
3467 vmSymbols::void_method_signature()));
3468 if (m.is_null()) {
3469 ResourceMark rm(THREAD);
3470 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3471 Method::name_and_sig_as_C_string(init_klass(),
3472 vmSymbols::object_initializer_name(),
3473 vmSymbols::void_method_signature()));
3474 }
3475
3476 if (curr_klass == init_klass && !m->is_public()) {
3477 // Calling the constructor for class 'curr_klass'.
3478 // Only allow calls to a public no-arg constructor.
3479 // This path corresponds to creating an Externalizable object.
3480 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3481 }
3482
3483 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3484 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3485 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3486 }
3487
3488 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3489 // Call constructor m. This might call a constructor higher up in the hierachy
3490 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3491
3492 return JNIHandles::make_local(obj());
3493 JVM_END
3494
3495
3496 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3497 JVMWrapper("JVM_AllocateNewArray");
3498 JvmtiVMObjectAllocEventCollector oam;
3499 oop mirror = JNIHandles::resolve_non_null(currClass);
3500
3501 if (java_lang_Class::is_primitive(mirror)) {
3502 THROW_0(vmSymbols::java_lang_InvalidClassException());
3503 }
3504 Klass* k = java_lang_Class::as_Klass(mirror);
3505 oop result;
3506
3507 if (k->oop_is_typeArray()) {
3508 // typeArray
3509 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3510 } else if (k->oop_is_objArray()) {
3511 // objArray
3512 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3513 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3514 result = oak->allocate(length, CHECK_NULL);
3515 } else {
3516 THROW_0(vmSymbols::java_lang_InvalidClassException());
3517 }
3518 return JNIHandles::make_local(env, result);
3519 JVM_END
3520
3521
3522 // Return the first non-null class loader up the execution stack, or null
3523 // if only code from the null class loader is on the stack.
3524
3525 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3526 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3527 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3528 oop loader = vfst.method()->method_holder()->class_loader();
3529 if (loader != NULL) {
3530 return JNIHandles::make_local(env, loader);
3531 }
3532 }
3533 return NULL;
3534 JVM_END
3535
3536
3537 // Load a class relative to the most recent class on the stack with a non-null
3538 // classloader.
3539 // This function has been deprecated and should not be considered part of the
3540 // specified JVM interface.
3541
3542 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3543 jclass currClass, jstring currClassName))
3544 JVMWrapper("JVM_LoadClass0");
3545 // Receiver is not used
3546 ResourceMark rm(THREAD);
3547
3548 // Class name argument is not guaranteed to be in internal format
3549 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3550 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3551
3552 const char* str = java_lang_String::as_utf8_string(string());
3553
3554 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3555 // It's impossible to create this class; the name cannot fit
3556 // into the constant pool.
3557 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3558 }
3559
3560 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3561 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3562 // Find the most recent class on the stack with a non-null classloader
3563 oop loader = NULL;
3564 oop protection_domain = NULL;
3565 if (curr_klass.is_null()) {
3566 for (vframeStream vfst(thread);
3567 !vfst.at_end() && loader == NULL;
3568 vfst.next()) {
3569 if (!vfst.method()->is_native()) {
3570 InstanceKlass* holder = vfst.method()->method_holder();
3571 loader = holder->class_loader();
3572 protection_domain = holder->protection_domain();
3573 }
3574 }
3575 } else {
3576 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3577 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3578 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3579 }
3580 Handle h_loader(THREAD, loader);
3581 Handle h_prot (THREAD, protection_domain);
3582 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3583 false, thread);
3584 if (TraceClassResolution && result != NULL) {
3585 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3586 }
3587 return result;
3588 JVM_END
3589
3590
3591 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3592
3593
3594 // resolve array handle and check arguments
3595 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3596 if (arr == NULL) {
3597 THROW_0(vmSymbols::java_lang_NullPointerException());
3598 }
3599 oop a = JNIHandles::resolve_non_null(arr);
3600 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3601 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3602 }
3603 return arrayOop(a);
3604 }
3605
3606
3607 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3608 JVMWrapper("JVM_GetArrayLength");
3609 arrayOop a = check_array(env, arr, false, CHECK_0);
3610 return a->length();
3611 JVM_END
3612
3613
3614 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3615 JVMWrapper("JVM_Array_Get");
3616 JvmtiVMObjectAllocEventCollector oam;
3617 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3618 jvalue value;
3619 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3620 oop box = Reflection::box(&value, type, CHECK_NULL);
3621 return JNIHandles::make_local(env, box);
3622 JVM_END
3623
3624
3625 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3626 JVMWrapper("JVM_GetPrimitiveArrayElement");
3627 jvalue value;
3628 value.i = 0; // to initialize value before getting used in CHECK
3629 arrayOop a = check_array(env, arr, true, CHECK_(value));
3630 assert(a->is_typeArray(), "just checking");
3631 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3632 BasicType wide_type = (BasicType) wCode;
3633 if (type != wide_type) {
3634 Reflection::widen(&value, type, wide_type, CHECK_(value));
3635 }
3636 return value;
3637 JVM_END
3638
3639
3640 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3641 JVMWrapper("JVM_SetArrayElement");
3642 arrayOop a = check_array(env, arr, false, CHECK);
3643 oop box = JNIHandles::resolve(val);
3644 jvalue value;
3645 value.i = 0; // to initialize value before getting used in CHECK
3646 BasicType value_type;
3647 if (a->is_objArray()) {
3648 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3649 value_type = Reflection::unbox_for_regular_object(box, &value);
3650 } else {
3651 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3652 }
3653 Reflection::array_set(&value, a, index, value_type, CHECK);
3654 JVM_END
3655
3656
3657 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3658 JVMWrapper("JVM_SetPrimitiveArrayElement");
3659 arrayOop a = check_array(env, arr, true, CHECK);
3660 assert(a->is_typeArray(), "just checking");
3661 BasicType value_type = (BasicType) vCode;
3662 Reflection::array_set(&v, a, index, value_type, CHECK);
3663 JVM_END
3664
3665
3666 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3667 JVMWrapper("JVM_NewArray");
3668 JvmtiVMObjectAllocEventCollector oam;
3669 oop element_mirror = JNIHandles::resolve(eltClass);
3670 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3671 return JNIHandles::make_local(env, result);
3672 JVM_END
3673
3674
3675 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3676 JVMWrapper("JVM_NewMultiArray");
3677 JvmtiVMObjectAllocEventCollector oam;
3678 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3679 oop element_mirror = JNIHandles::resolve(eltClass);
3680 assert(dim_array->is_typeArray(), "just checking");
3681 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3682 return JNIHandles::make_local(env, result);
3683 JVM_END
3684
3685
3686 // Networking library support ////////////////////////////////////////////////////////////////////
3687
3688 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3689 JVMWrapper("JVM_InitializeSocketLibrary");
3690 return 0;
3691 JVM_END
3692
3693
3694 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3695 JVMWrapper("JVM_Socket");
3696 return os::socket(domain, type, protocol);
3697 JVM_END
3698
3699
3700 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3701 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3702 //%note jvm_r6
3703 return os::socket_close(fd);
3704 JVM_END
3705
3706
3707 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3708 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3709 //%note jvm_r6
3710 return os::socket_shutdown(fd, howto);
3711 JVM_END
3712
3713
3714 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3715 JVMWrapper2("JVM_Recv (0x%x)", fd);
3716 //%note jvm_r6
3717 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3718 JVM_END
3719
3720
3721 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3722 JVMWrapper2("JVM_Send (0x%x)", fd);
3723 //%note jvm_r6
3724 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3725 JVM_END
3726
3727
3728 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3729 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3730 //%note jvm_r6
3731 return os::timeout(fd, timeout);
3732 JVM_END
3733
3734
3735 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3736 JVMWrapper2("JVM_Listen (0x%x)", fd);
3737 //%note jvm_r6
3738 return os::listen(fd, count);
3739 JVM_END
3740
3741
3742 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3743 JVMWrapper2("JVM_Connect (0x%x)", fd);
3744 //%note jvm_r6
3745 return os::connect(fd, him, (socklen_t)len);
3746 JVM_END
3747
3748
3749 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3750 JVMWrapper2("JVM_Bind (0x%x)", fd);
3751 //%note jvm_r6
3752 return os::bind(fd, him, (socklen_t)len);
3753 JVM_END
3754
3755
3756 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3757 JVMWrapper2("JVM_Accept (0x%x)", fd);
3758 //%note jvm_r6
3759 socklen_t socklen = (socklen_t)(*len);
3760 jint result = os::accept(fd, him, &socklen);
3761 *len = (jint)socklen;
3762 return result;
3763 JVM_END
3764
3765
3766 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3767 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3768 //%note jvm_r6
3769 socklen_t socklen = (socklen_t)(*fromlen);
3770 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3771 *fromlen = (int)socklen;
3772 return result;
3773 JVM_END
3774
3775
3776 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3777 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3778 //%note jvm_r6
3779 socklen_t socklen = (socklen_t)(*len);
3780 jint result = os::get_sock_name(fd, him, &socklen);
3781 *len = (int)socklen;
3782 return result;
3783 JVM_END
3784
3785
3786 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3787 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3788 //%note jvm_r6
3789 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3790 JVM_END
3791
3792
3793 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3794 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3795 //%note jvm_r6
3796 return os::socket_available(fd, pbytes);
3797 JVM_END
3798
3799
3800 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3801 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3802 //%note jvm_r6
3803 socklen_t socklen = (socklen_t)(*optlen);
3804 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3805 *optlen = (int)socklen;
3806 return result;
3807 JVM_END
3808
3809
3810 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3811 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3812 //%note jvm_r6
3813 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3814 JVM_END
3815
3816
3817 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3818 JVMWrapper("JVM_GetHostName");
3819 return os::get_host_name(name, namelen);
3820 JVM_END
3821
3822
3823 // Library support ///////////////////////////////////////////////////////////////////////////
3824
3825 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3826 //%note jvm_ct
3827 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3828 char ebuf[1024];
3829 void *load_result;
3830 {
3831 ThreadToNativeFromVM ttnfvm(thread);
3832 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3833 }
3834 if (load_result == NULL) {
3835 char msg[1024];
3836 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3837 // Since 'ebuf' may contain a string encoded using
3838 // platform encoding scheme, we need to pass
3839 // Exceptions::unsafe_to_utf8 to the new_exception method
3840 // as the last argument. See bug 6367357.
3841 Handle h_exception =
3842 Exceptions::new_exception(thread,
3843 vmSymbols::java_lang_UnsatisfiedLinkError(),
3844 msg, Exceptions::unsafe_to_utf8);
3845
3846 THROW_HANDLE_0(h_exception);
3847 }
3848 return load_result;
3849 JVM_END
3850
3851
3852 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3853 JVMWrapper("JVM_UnloadLibrary");
3854 os::dll_unload(handle);
3855 JVM_END
3856
3857
3858 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3859 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3860 return os::dll_lookup(handle, name);
3861 JVM_END
3862
3863
3864 // Floating point support ////////////////////////////////////////////////////////////////////
3865
3866 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3867 JVMWrapper("JVM_IsNaN");
3868 return g_isnan(a);
3869 JVM_END
3870
3871
3872 // JNI version ///////////////////////////////////////////////////////////////////////////////
3873
3874 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3875 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3876 return Threads::is_supported_jni_version_including_1_1(version);
3877 JVM_END
3878
3879
3880 // String support ///////////////////////////////////////////////////////////////////////////
3881
3882 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3883 JVMWrapper("JVM_InternString");
3884 JvmtiVMObjectAllocEventCollector oam;
3885 if (str == NULL) return NULL;
3886 oop string = JNIHandles::resolve_non_null(str);
3887 oop result = StringTable::intern(string, CHECK_NULL);
3888 return (jstring) JNIHandles::make_local(env, result);
3889 JVM_END
3890
3891
3892 // Raw monitor support //////////////////////////////////////////////////////////////////////
3893
3894 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3895 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3896 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3897 // that only works with java threads.
3898
3899
3900 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3901 VM_Exit::block_if_vm_exited();
3902 JVMWrapper("JVM_RawMonitorCreate");
3903 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3904 }
3905
3906
3907 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3908 VM_Exit::block_if_vm_exited();
3909 JVMWrapper("JVM_RawMonitorDestroy");
3910 delete ((Mutex*) mon);
3911 }
3912
3913
3914 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3915 VM_Exit::block_if_vm_exited();
3916 JVMWrapper("JVM_RawMonitorEnter");
3917 ((Mutex*) mon)->jvm_raw_lock();
3918 return 0;
3919 }
3920
3921
3922 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3923 VM_Exit::block_if_vm_exited();
3924 JVMWrapper("JVM_RawMonitorExit");
3925 ((Mutex*) mon)->jvm_raw_unlock();
3926 }
3927
3928
3929 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3930
3931 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3932 // Security Note:
3933 // The Java level wrapper will perform the necessary security check allowing
3934 // us to pass the NULL as the initiating class loader.
3935 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3936
3937 KlassHandle klass_handle(THREAD, klass);
3938 // Check if we should initialize the class
3939 if (init && klass_handle->oop_is_instance()) {
3940 klass_handle->initialize(CHECK_NULL);
3941 }
3942 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3943 }
3944
3945
3946 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3947
3948 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3949 JVMWrapper("JVM_InvokeMethod");
3950 Handle method_handle;
3951 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3952 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3953 Handle receiver(THREAD, JNIHandles::resolve(obj));
3954 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3955 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3956 jobject res = JNIHandles::make_local(env, result);
3957 if (JvmtiExport::should_post_vm_object_alloc()) {
3958 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3959 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3960 if (java_lang_Class::is_primitive(ret_type)) {
3961 // Only for primitive type vm allocates memory for java object.
3962 // See box() method.
3963 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3964 }
3965 }
3966 return res;
3967 } else {
3968 THROW_0(vmSymbols::java_lang_StackOverflowError());
3969 }
3970 JVM_END
3971
3972
3973 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3974 JVMWrapper("JVM_NewInstanceFromConstructor");
3975 oop constructor_mirror = JNIHandles::resolve(c);
3976 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3977 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3978 jobject res = JNIHandles::make_local(env, result);
3979 if (JvmtiExport::should_post_vm_object_alloc()) {
3980 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3981 }
3982 return res;
3983 JVM_END
3984
3985 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3986
3987 JVM_LEAF(jboolean, JVM_SupportsCX8())
3988 JVMWrapper("JVM_SupportsCX8");
3989 return VM_Version::supports_cx8();
3990 JVM_END
3991
3992
3993 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
3994 JVMWrapper("JVM_CX8Field");
3995 jlong res;
3996 oop o = JNIHandles::resolve(obj);
3997 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3998 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
3999
4000 assert(VM_Version::supports_cx8(), "cx8 not supported");
4001 res = Atomic::cmpxchg(newVal, addr, oldVal);
4002
4003 return res == oldVal;
4004 JVM_END
4005
4006 // DTrace ///////////////////////////////////////////////////////////////////
4007
4008 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4009 JVMWrapper("JVM_DTraceGetVersion");
4010 return (jint)JVM_TRACING_DTRACE_VERSION;
4011 JVM_END
4012
4013 JVM_ENTRY(jlong,JVM_DTraceActivate(
4014 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4015 JVM_DTraceProvider* providers))
4016 JVMWrapper("JVM_DTraceActivate");
4017 return DTraceJSDT::activate(
4018 version, module_name, providers_count, providers, CHECK_0);
4019 JVM_END
4020
4021 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4022 JVMWrapper("JVM_DTraceIsProbeEnabled");
4023 return DTraceJSDT::is_probe_enabled(method);
4024 JVM_END
4025
4026 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4027 JVMWrapper("JVM_DTraceDispose");
4028 DTraceJSDT::dispose(handle);
4029 JVM_END
4030
4031 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4032 JVMWrapper("JVM_DTraceIsSupported");
4033 return DTraceJSDT::is_supported();
4034 JVM_END
4035
4036 // Returns an array of all live Thread objects (VM internal JavaThreads,
4037 // jvmti agent threads, and JNI attaching threads are skipped)
4038 // See CR 6404306 regarding JNI attaching threads
4039 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4040 ResourceMark rm(THREAD);
4041 ThreadsListEnumerator tle(THREAD, false, false);
4042 JvmtiVMObjectAllocEventCollector oam;
4043
4044 int num_threads = tle.num_threads();
4045 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4046 objArrayHandle threads_ah(THREAD, r);
4047
4048 for (int i = 0; i < num_threads; i++) {
4049 Handle h = tle.get_threadObj(i);
4050 threads_ah->obj_at_put(i, h());
4051 }
4052
4053 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4054 JVM_END
4055
4056
4057 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4058 // Return StackTraceElement[][], each element is the stack trace of a thread in
4059 // the corresponding entry in the given threads array
4060 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4061 JVMWrapper("JVM_DumpThreads");
4062 JvmtiVMObjectAllocEventCollector oam;
4063
4064 // Check if threads is null
4065 if (threads == NULL) {
4066 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4067 }
4068
4069 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4070 objArrayHandle ah(THREAD, a);
4071 int num_threads = ah->length();
4072 // check if threads is non-empty array
4073 if (num_threads == 0) {
4074 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4075 }
4076
4077 // check if threads is not an array of objects of Thread class
4078 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4079 if (k != SystemDictionary::Thread_klass()) {
4080 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4081 }
4082
4083 ResourceMark rm(THREAD);
4084
4085 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4086 for (int i = 0; i < num_threads; i++) {
4087 oop thread_obj = ah->obj_at(i);
4088 instanceHandle h(THREAD, (instanceOop) thread_obj);
4089 thread_handle_array->append(h);
4090 }
4091
4092 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4093 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4094
4095 JVM_END
4096
4097 // JVM monitoring and management support
4098 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4099 return Management::get_jmm_interface(version);
4100 JVM_END
4101
4102 // com.sun.tools.attach.VirtualMachine agent properties support
4103 //
4104 // Initialize the agent properties with the properties maintained in the VM
4105 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4106 JVMWrapper("JVM_InitAgentProperties");
4107 ResourceMark rm;
4108
4109 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4110
4111 PUTPROP(props, "sun.java.command", Arguments::java_command());
4112 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4113 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4114 return properties;
4115 JVM_END
4116
4117 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4118 {
4119 JVMWrapper("JVM_GetEnclosingMethodInfo");
4120 JvmtiVMObjectAllocEventCollector oam;
4121
4122 if (ofClass == NULL) {
4123 return NULL;
4124 }
4125 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4126 // Special handling for primitive objects
4127 if (java_lang_Class::is_primitive(mirror())) {
4128 return NULL;
4129 }
4130 Klass* k = java_lang_Class::as_Klass(mirror());
4131 if (!k->oop_is_instance()) {
4132 return NULL;
4133 }
4134 instanceKlassHandle ik_h(THREAD, k);
4135 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4136 if (encl_method_class_idx == 0) {
4137 return NULL;
4138 }
4139 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4140 objArrayHandle dest(THREAD, dest_o);
4141 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4142 dest->obj_at_put(0, enc_k->java_mirror());
4143 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4144 if (encl_method_method_idx != 0) {
4145 Symbol* sym = ik_h->constants()->symbol_at(
4146 extract_low_short_from_int(
4147 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4148 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4149 dest->obj_at_put(1, str());
4150 sym = ik_h->constants()->symbol_at(
4151 extract_high_short_from_int(
4152 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4153 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4154 dest->obj_at_put(2, str());
4155 }
4156 return (jobjectArray) JNIHandles::make_local(dest());
4157 }
4158 JVM_END
4159
4160 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4161 jint javaThreadState))
4162 {
4163 // If new thread states are added in future JDK and VM versions,
4164 // this should check if the JDK version is compatible with thread
4165 // states supported by the VM. Return NULL if not compatible.
4166 //
4167 // This function must map the VM java_lang_Thread::ThreadStatus
4168 // to the Java thread state that the JDK supports.
4169 //
4170
4171 typeArrayHandle values_h;
4172 switch (javaThreadState) {
4173 case JAVA_THREAD_STATE_NEW : {
4174 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4175 values_h = typeArrayHandle(THREAD, r);
4176 values_h->int_at_put(0, java_lang_Thread::NEW);
4177 break;
4178 }
4179 case JAVA_THREAD_STATE_RUNNABLE : {
4180 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4181 values_h = typeArrayHandle(THREAD, r);
4182 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4183 break;
4184 }
4185 case JAVA_THREAD_STATE_BLOCKED : {
4186 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4187 values_h = typeArrayHandle(THREAD, r);
4188 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4189 break;
4190 }
4191 case JAVA_THREAD_STATE_WAITING : {
4192 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4193 values_h = typeArrayHandle(THREAD, r);
4194 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4195 values_h->int_at_put(1, java_lang_Thread::PARKED);
4196 break;
4197 }
4198 case JAVA_THREAD_STATE_TIMED_WAITING : {
4199 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4200 values_h = typeArrayHandle(THREAD, r);
4201 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4202 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4203 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4204 break;
4205 }
4206 case JAVA_THREAD_STATE_TERMINATED : {
4207 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4208 values_h = typeArrayHandle(THREAD, r);
4209 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4210 break;
4211 }
4212 default:
4213 // Unknown state - probably incompatible JDK version
4214 return NULL;
4215 }
4216
4217 return (jintArray) JNIHandles::make_local(env, values_h());
4218 }
4219 JVM_END
4220
4221
4222 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4223 jint javaThreadState,
4224 jintArray values))
4225 {
4226 // If new thread states are added in future JDK and VM versions,
4227 // this should check if the JDK version is compatible with thread
4228 // states supported by the VM. Return NULL if not compatible.
4229 //
4230 // This function must map the VM java_lang_Thread::ThreadStatus
4231 // to the Java thread state that the JDK supports.
4232 //
4233
4234 ResourceMark rm;
4235
4236 // Check if threads is null
4237 if (values == NULL) {
4238 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4239 }
4240
4241 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4242 typeArrayHandle values_h(THREAD, v);
4243
4244 objArrayHandle names_h;
4245 switch (javaThreadState) {
4246 case JAVA_THREAD_STATE_NEW : {
4247 assert(values_h->length() == 1 &&
4248 values_h->int_at(0) == java_lang_Thread::NEW,
4249 "Invalid threadStatus value");
4250
4251 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4252 1, /* only 1 substate */
4253 CHECK_NULL);
4254 names_h = objArrayHandle(THREAD, r);
4255 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4256 names_h->obj_at_put(0, name());
4257 break;
4258 }
4259 case JAVA_THREAD_STATE_RUNNABLE : {
4260 assert(values_h->length() == 1 &&
4261 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4262 "Invalid threadStatus value");
4263
4264 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4265 1, /* only 1 substate */
4266 CHECK_NULL);
4267 names_h = objArrayHandle(THREAD, r);
4268 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4269 names_h->obj_at_put(0, name());
4270 break;
4271 }
4272 case JAVA_THREAD_STATE_BLOCKED : {
4273 assert(values_h->length() == 1 &&
4274 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4275 "Invalid threadStatus value");
4276
4277 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4278 1, /* only 1 substate */
4279 CHECK_NULL);
4280 names_h = objArrayHandle(THREAD, r);
4281 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4282 names_h->obj_at_put(0, name());
4283 break;
4284 }
4285 case JAVA_THREAD_STATE_WAITING : {
4286 assert(values_h->length() == 2 &&
4287 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4288 values_h->int_at(1) == java_lang_Thread::PARKED,
4289 "Invalid threadStatus value");
4290 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4291 2, /* number of substates */
4292 CHECK_NULL);
4293 names_h = objArrayHandle(THREAD, r);
4294 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4295 CHECK_NULL);
4296 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4297 CHECK_NULL);
4298 names_h->obj_at_put(0, name0());
4299 names_h->obj_at_put(1, name1());
4300 break;
4301 }
4302 case JAVA_THREAD_STATE_TIMED_WAITING : {
4303 assert(values_h->length() == 3 &&
4304 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4305 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4306 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4307 "Invalid threadStatus value");
4308 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4309 3, /* number of substates */
4310 CHECK_NULL);
4311 names_h = objArrayHandle(THREAD, r);
4312 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4313 CHECK_NULL);
4314 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4315 CHECK_NULL);
4316 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4317 CHECK_NULL);
4318 names_h->obj_at_put(0, name0());
4319 names_h->obj_at_put(1, name1());
4320 names_h->obj_at_put(2, name2());
4321 break;
4322 }
4323 case JAVA_THREAD_STATE_TERMINATED : {
4324 assert(values_h->length() == 1 &&
4325 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4326 "Invalid threadStatus value");
4327 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4328 1, /* only 1 substate */
4329 CHECK_NULL);
4330 names_h = objArrayHandle(THREAD, r);
4331 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4332 names_h->obj_at_put(0, name());
4333 break;
4334 }
4335 default:
4336 // Unknown state - probably incompatible JDK version
4337 return NULL;
4338 }
4339 return (jobjectArray) JNIHandles::make_local(env, names_h());
4340 }
4341 JVM_END
4342
4343 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4344 {
4345 memset(info, 0, info_size);
4346
4347 info->jvm_version = Abstract_VM_Version::jvm_version();
4348 info->update_version = 0; /* 0 in HotSpot Express VM */
4349 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4350
4351 // when we add a new capability in the jvm_version_info struct, we should also
4352 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4353 // counter defined in runtimeService.cpp.
4354 info->is_attachable = AttachListener::is_attach_supported();
4355 }
4356 JVM_END