1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #if INCLUDE_CDS
32 #include "classfile/sharedClassUtil.hpp"
33 #include "classfile/systemDictionaryShared.hpp"
34 #endif
35 #include "classfile/vmSymbols.hpp"
36 #include "gc_interface/collectedHeap.inline.hpp"
37 #include "interpreter/bytecode.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/fieldStreams.hpp"
41 #include "oops/instanceKlass.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/method.hpp"
44 #include "prims/jvm.h"
45 #include "prims/jvm_misc.hpp"
46 #include "prims/jvmtiExport.hpp"
47 #include "prims/jvmtiThreadState.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "prims/privilegedStack.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/dtraceJSDT.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jfieldIDWorkaround.hpp"
58 #include "runtime/orderAccess.inline.hpp"
59 #include "runtime/os.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/vframe.hpp"
63 #include "runtime/vm_operations.hpp"
64 #include "services/attachListener.hpp"
65 #include "services/management.hpp"
66 #include "services/threadService.hpp"
67 #include "trace/tracing.hpp"
68 #include "utilities/copy.hpp"
69 #include "utilities/defaultStream.hpp"
70 #include "utilities/dtrace.hpp"
71 #include "utilities/events.hpp"
72 #include "utilities/histogram.hpp"
73 #include "utilities/top.hpp"
74 #include "utilities/utf8.hpp"
75 #ifdef TARGET_OS_FAMILY_linux
76 # include "jvm_linux.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_solaris
79 # include "jvm_solaris.h"
80 #endif
81 #ifdef TARGET_OS_FAMILY_windows
82 # include "jvm_windows.h"
83 #endif
84 #ifdef TARGET_OS_FAMILY_aix
85 # include "jvm_aix.h"
86 #endif
87 #ifdef TARGET_OS_FAMILY_bsd
88 # include "jvm_bsd.h"
89 #endif
90
91 #include <errno.h>
92
93 #ifndef USDT2
94 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
95 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
96 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
97 #endif /* !USDT2 */
98
99 /*
100 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
101 such ctors and calls MUST NOT come between an oop declaration/init and its
102 usage because if objects are move this may cause various memory stomps, bus
103 errors and segfaults. Here is a cookbook for causing so called "naked oop
104 failures":
105
106 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
107 JVMWrapper("JVM_GetClassDeclaredFields");
108
109 // Object address to be held directly in mirror & not visible to GC
110 oop mirror = JNIHandles::resolve_non_null(ofClass);
111
112 // If this ctor can hit a safepoint, moving objects around, then
113 ComplexConstructor foo;
114
115 // Boom! mirror may point to JUNK instead of the intended object
116 (some dereference of mirror)
117
118 // Here's another call that may block for GC, making mirror stale
119 MutexLocker ml(some_lock);
120
121 // And here's an initializer that can result in a stale oop
122 // all in one step.
123 oop o = call_that_can_throw_exception(TRAPS);
124
125
126 The solution is to keep the oop declaration BELOW the ctor or function
127 call that might cause a GC, do another resolve to reassign the oop, or
128 consider use of a Handle instead of an oop so there is immunity from object
129 motion. But note that the "QUICK" entries below do not have a handlemark
130 and thus can only support use of handles passed in.
131 */
132
133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
134 ResourceMark rm;
135 int line_number = -1;
136 const char * source_file = NULL;
137 const char * trace = "explicit";
138 InstanceKlass* caller = NULL;
139 JavaThread* jthread = JavaThread::current();
140 if (jthread->has_last_Java_frame()) {
141 vframeStream vfst(jthread);
142
143 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
144 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
145 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
146 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
147 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
148
149 Method* last_caller = NULL;
150
151 while (!vfst.at_end()) {
152 Method* m = vfst.method();
153 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
154 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
155 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
156 break;
157 }
158 last_caller = m;
159 vfst.next();
160 }
161 // if this is called from Class.forName0 and that is called from Class.forName,
162 // then print the caller of Class.forName. If this is Class.loadClass, then print
163 // that caller, otherwise keep quiet since this should be picked up elsewhere.
164 bool found_it = false;
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName0_name()) {
168 vfst.next();
169 if (!vfst.at_end() &&
170 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
171 vfst.method()->name() == vmSymbols::forName_name()) {
172 vfst.next();
173 found_it = true;
174 }
175 } else if (last_caller != NULL &&
176 last_caller->method_holder()->name() ==
177 vmSymbols::java_lang_ClassLoader() &&
178 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
179 last_caller->name() == vmSymbols::loadClass_name())) {
180 found_it = true;
181 } else if (!vfst.at_end()) {
182 if (vfst.method()->is_native()) {
183 // JNI call
184 found_it = true;
185 }
186 }
187 if (found_it && !vfst.at_end()) {
188 // found the caller
189 caller = vfst.method()->method_holder();
190 line_number = vfst.method()->line_number_from_bci(vfst.bci());
191 if (line_number == -1) {
192 // show method name if it's a native method
193 trace = vfst.method()->name_and_sig_as_C_string();
194 }
195 Symbol* s = caller->source_file_name();
196 if (s != NULL) {
197 source_file = s->as_C_string();
198 }
199 }
200 }
201 if (caller != NULL) {
202 if (to_class != caller) {
203 const char * from = caller->external_name();
204 const char * to = to_class->external_name();
205 // print in a single call to reduce interleaving between threads
206 if (source_file != NULL) {
207 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
208 } else {
209 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
210 }
211 }
212 }
213 }
214
215 void trace_class_resolution(Klass* to_class) {
216 EXCEPTION_MARK;
217 trace_class_resolution_impl(to_class, THREAD);
218 if (HAS_PENDING_EXCEPTION) {
219 CLEAR_PENDING_EXCEPTION;
220 }
221 }
222
223 // Wrapper to trace JVM functions
224
225 #ifdef ASSERT
226 class JVMTraceWrapper : public StackObj {
227 public:
228 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
229 if (TraceJVMCalls) {
230 va_list ap;
231 va_start(ap, format);
232 tty->print("JVM ");
233 tty->vprint_cr(format, ap);
234 va_end(ap);
235 }
236 }
237 };
238
239 Histogram* JVMHistogram;
240 volatile jint JVMHistogram_lock = 0;
241
242 class JVMHistogramElement : public HistogramElement {
243 public:
244 JVMHistogramElement(const char* name);
245 };
246
247 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
248 _name = elementName;
249 uintx count = 0;
250
251 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
252 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
253 count +=1;
254 if ( (WarnOnStalledSpinLock > 0)
255 && (count % WarnOnStalledSpinLock == 0)) {
256 warning("JVMHistogram_lock seems to be stalled");
257 }
258 }
259 }
260
261 if(JVMHistogram == NULL)
262 JVMHistogram = new Histogram("JVM Call Counts",100);
263
264 JVMHistogram->add_element(this);
265 Atomic::dec(&JVMHistogram_lock);
266 }
267
268 #define JVMCountWrapper(arg) \
269 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
270 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
271
272 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
273 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
274 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
275 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
276 #else
277 #define JVMWrapper(arg1)
278 #define JVMWrapper2(arg1, arg2)
279 #define JVMWrapper3(arg1, arg2, arg3)
280 #define JVMWrapper4(arg1, arg2, arg3, arg4)
281 #endif
282
283
284 // Interface version /////////////////////////////////////////////////////////////////////
285
286
287 JVM_LEAF(jint, JVM_GetInterfaceVersion())
288 return JVM_INTERFACE_VERSION;
289 JVM_END
290
291
292 // java.lang.System //////////////////////////////////////////////////////////////////////
293
294
295 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
296 JVMWrapper("JVM_CurrentTimeMillis");
297 return os::javaTimeMillis();
298 JVM_END
299
300 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
301 JVMWrapper("JVM_NanoTime");
302 return os::javaTimeNanos();
303 JVM_END
304
305
306 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
307 jobject dst, jint dst_pos, jint length))
308 JVMWrapper("JVM_ArrayCopy");
309 // Check if we have null pointers
310 if (src == NULL || dst == NULL) {
311 THROW(vmSymbols::java_lang_NullPointerException());
312 }
313 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
314 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
315 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
316 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
317 // Do copy
318 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
319 JVM_END
320
321
322 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
323 JavaValue r(T_OBJECT);
324 // public synchronized Object put(Object key, Object value);
325 HandleMark hm(THREAD);
326 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
327 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
328 JavaCalls::call_virtual(&r,
329 props,
330 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
331 vmSymbols::put_name(),
332 vmSymbols::object_object_object_signature(),
333 key_str,
334 value_str,
335 THREAD);
336 }
337
338
339 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
340
341
342 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
343 JVMWrapper("JVM_InitProperties");
344 ResourceMark rm;
345
346 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
347
348 // System property list includes both user set via -D option and
349 // jvm system specific properties.
350 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
351 PUTPROP(props, p->key(), p->value());
352 }
353
354 // Convert the -XX:MaxDirectMemorySize= command line flag
355 // to the sun.nio.MaxDirectMemorySize property.
356 // Do this after setting user properties to prevent people
357 // from setting the value with a -D option, as requested.
358 {
359 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
360 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
361 } else {
362 char as_chars[256];
363 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
364 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
365 }
366 }
367
368 // JVM monitoring and management support
369 // Add the sun.management.compiler property for the compiler's name
370 {
371 #undef CSIZE
372 #if defined(_LP64) || defined(_WIN64)
373 #define CSIZE "64-Bit "
374 #else
375 #define CSIZE
376 #endif // 64bit
377
378 #ifdef TIERED
379 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
380 #else
381 #if defined(COMPILER1)
382 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
383 #elif defined(COMPILER2)
384 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
385 #else
386 const char* compiler_name = "";
387 #endif // compilers
388 #endif // TIERED
389
390 if (*compiler_name != '\0' &&
391 (Arguments::mode() != Arguments::_int)) {
392 PUTPROP(props, "sun.management.compiler", compiler_name);
393 }
394 }
395
396 return properties;
397 JVM_END
398
399
400 /*
401 * Return the temporary directory that the VM uses for the attach
402 * and perf data files.
403 *
404 * It is important that this directory is well-known and the
405 * same for all VM instances. It cannot be affected by configuration
406 * variables such as java.io.tmpdir.
407 */
408 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
409 JVMWrapper("JVM_GetTemporaryDirectory");
410 HandleMark hm(THREAD);
411 const char* temp_dir = os::get_temp_directory();
412 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
413 return (jstring) JNIHandles::make_local(env, h());
414 JVM_END
415
416
417 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
418
419 extern volatile jint vm_created;
420
421 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
422 if (vm_created != 0 && (code == 0)) {
423 // The VM is about to exit. We call back into Java to check whether finalizers should be run
424 Universe::run_finalizers_on_exit();
425 }
426 before_exit(thread);
427 vm_exit(code);
428 JVM_END
429
430
431 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
432 before_exit(thread);
433 vm_exit(code);
434 JVM_END
435
436
437 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
438 register_on_exit_function(func);
439 JVM_END
440
441
442 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
443 JVMWrapper("JVM_GC");
444 if (!DisableExplicitGC) {
445 Universe::heap()->collect(GCCause::_java_lang_system_gc);
446 }
447 JVM_END
448
449
450 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
451 JVMWrapper("JVM_MaxObjectInspectionAge");
452 return Universe::heap()->millis_since_last_gc();
453 JVM_END
454
455
456 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
457 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
458 JVM_END
459
460
461 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
462 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
463 JVM_END
464
465 static inline jlong convert_size_t_to_jlong(size_t val) {
466 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
467 NOT_LP64 (return (jlong)val;)
468 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
469 }
470
471 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
472 JVMWrapper("JVM_TotalMemory");
473 size_t n = Universe::heap()->capacity();
474 return convert_size_t_to_jlong(n);
475 JVM_END
476
477
478 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
479 JVMWrapper("JVM_FreeMemory");
480 CollectedHeap* ch = Universe::heap();
481 size_t n;
482 {
483 MutexLocker x(Heap_lock);
484 n = ch->capacity() - ch->used();
485 }
486 return convert_size_t_to_jlong(n);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
491 JVMWrapper("JVM_MaxMemory");
492 size_t n = Universe::heap()->max_capacity();
493 return convert_size_t_to_jlong(n);
494 JVM_END
495
496
497 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
498 JVMWrapper("JVM_ActiveProcessorCount");
499 return os::active_processor_count();
500 JVM_END
501
502
503
504 // java.lang.Throwable //////////////////////////////////////////////////////
505
506
507 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
508 JVMWrapper("JVM_FillInStackTrace");
509 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
510 java_lang_Throwable::fill_in_stack_trace(exception);
511 JVM_END
512
513
514 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
515 JVMWrapper("JVM_GetStackTraceDepth");
516 oop exception = JNIHandles::resolve(throwable);
517 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
518 JVM_END
519
520
521 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
522 JVMWrapper("JVM_GetStackTraceElement");
523 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
524 oop exception = JNIHandles::resolve(throwable);
525 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
526 return JNIHandles::make_local(env, element);
527 JVM_END
528
529
530 // java.lang.Object ///////////////////////////////////////////////
531
532
533 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
534 JVMWrapper("JVM_IHashCode");
535 // as implemented in the classic virtual machine; return 0 if object is NULL
536 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
537 JVM_END
538
539
540 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
541 JVMWrapper("JVM_MonitorWait");
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
543 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
544 if (JvmtiExport::should_post_monitor_wait()) {
545 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
546
547 // The current thread already owns the monitor and it has not yet
548 // been added to the wait queue so the current thread cannot be
549 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
550 // event handler cannot accidentally consume an unpark() meant for
551 // the ParkEvent associated with this ObjectMonitor.
552 }
553 ObjectSynchronizer::wait(obj, ms, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
558 JVMWrapper("JVM_MonitorNotify");
559 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
560 ObjectSynchronizer::notify(obj, CHECK);
561 JVM_END
562
563
564 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
565 JVMWrapper("JVM_MonitorNotifyAll");
566 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
567 ObjectSynchronizer::notifyall(obj, CHECK);
568 JVM_END
569
570
571 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
572 JVMWrapper("JVM_Clone");
573 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
574 const KlassHandle klass (THREAD, obj->klass());
575 JvmtiVMObjectAllocEventCollector oam;
576
577 #ifdef ASSERT
578 // Just checking that the cloneable flag is set correct
579 if (obj->is_array()) {
580 guarantee(klass->is_cloneable(), "all arrays are cloneable");
581 } else {
582 guarantee(obj->is_instance(), "should be instanceOop");
583 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
584 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
585 }
586 #endif
587
588 // Check if class of obj supports the Cloneable interface.
589 // All arrays are considered to be cloneable (See JLS 20.1.5)
590 if (!klass->is_cloneable()) {
591 ResourceMark rm(THREAD);
592 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
593 }
594
595 // Make shallow object copy
596 const int size = obj->size();
597 oop new_obj = NULL;
598 if (obj->is_array()) {
599 const int length = ((arrayOop)obj())->length();
600 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
601 } else {
602 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
603 }
604 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
605 // is modifying a reference field in the clonee, a non-oop-atomic copy might
606 // be suspended in the middle of copying the pointer and end up with parts
607 // of two different pointers in the field. Subsequent dereferences will crash.
608 // 4846409: an oop-copy of objects with long or double fields or arrays of same
609 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
610 // of oops. We know objects are aligned on a minimum of an jlong boundary.
611 // The same is true of StubRoutines::object_copy and the various oop_copy
612 // variants, and of the code generated by the inline_native_clone intrinsic.
613 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
614 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
615 (size_t)align_object_size(size) / HeapWordsPerLong);
616 // Clear the header
617 new_obj->init_mark();
618
619 // Store check (mark entire object and let gc sort it out)
620 BarrierSet* bs = Universe::heap()->barrier_set();
621 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
622 bs->write_region(MemRegion((HeapWord*)new_obj, size));
623
624 // Caution: this involves a java upcall, so the clone should be
625 // "gc-robust" by this stage.
626 if (klass->has_finalizer()) {
627 assert(obj->is_instance(), "should be instanceOop");
628 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
629 }
630
631 return JNIHandles::make_local(env, oop(new_obj));
632 JVM_END
633
634 // java.lang.Compiler ////////////////////////////////////////////////////
635
636 // The initial cuts of the HotSpot VM will not support JITs, and all existing
637 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
638 // functions are all silently ignored unless JVM warnings are printed.
639
640 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
641 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
642 JVM_END
643
644
645 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
646 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
647 return JNI_FALSE;
648 JVM_END
649
650
651 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
652 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
653 return JNI_FALSE;
654 JVM_END
655
656
657 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
658 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
659 return JNI_FALSE;
660 JVM_END
661
662
663 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
664 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
665 return NULL;
666 JVM_END
667
668
669 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
670 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
671 JVM_END
672
673
674 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
675 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
676 JVM_END
677
678
679
680 // Error message support //////////////////////////////////////////////////////
681
682 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
683 JVMWrapper("JVM_GetLastErrorString");
684 return (jint)os::lasterror(buf, len);
685 JVM_END
686
687
688 // java.io.File ///////////////////////////////////////////////////////////////
689
690 JVM_LEAF(char*, JVM_NativePath(char* path))
691 JVMWrapper2("JVM_NativePath (%s)", path);
692 return os::native_path(path);
693 JVM_END
694
695
696 // Misc. class handling ///////////////////////////////////////////////////////////
697
698
699 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
700 JVMWrapper("JVM_GetCallerClass");
701
702 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
703 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
704 // temporarily for existing code to use until a replacement API is defined.
705 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
706 Klass* k = thread->security_get_caller_class(depth);
707 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
708 }
709
710 // Getting the class of the caller frame.
711 //
712 // The call stack at this point looks something like this:
713 //
714 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
715 // [1] [ @CallerSensitive API.method ]
716 // [.] [ (skipped intermediate frames) ]
717 // [n] [ caller ]
718 vframeStream vfst(thread);
719 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
720 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
721 Method* m = vfst.method();
722 assert(m != NULL, "sanity");
723 switch (n) {
724 case 0:
725 // This must only be called from Reflection.getCallerClass
726 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
727 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
728 }
729 // fall-through
730 case 1:
731 // Frame 0 and 1 must be caller sensitive.
732 if (!m->caller_sensitive()) {
733 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
734 }
735 break;
736 default:
737 if (!m->is_ignored_by_security_stack_walk()) {
738 // We have reached the desired frame; return the holder class.
739 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
740 }
741 break;
742 }
743 }
744 return NULL;
745 JVM_END
746
747
748 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
749 JVMWrapper("JVM_FindPrimitiveClass");
750 oop mirror = NULL;
751 BasicType t = name2type(utf);
752 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
753 mirror = Universe::java_mirror(t);
754 }
755 if (mirror == NULL) {
756 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
757 } else {
758 return (jclass) JNIHandles::make_local(env, mirror);
759 }
760 JVM_END
761
762
763 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
764 JVMWrapper("JVM_ResolveClass");
765 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
766 JVM_END
767
768
769 // Returns a class loaded by the bootstrap class loader; or null
770 // if not found. ClassNotFoundException is not thrown.
771 //
772 // Rationale behind JVM_FindClassFromBootLoader
773 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
774 // b> because of (a) java.dll has a direct dependecy on the unexported
775 // private symbol "_JVM_FindClassFromClassLoader@20".
776 // c> the launcher cannot use the private symbol as it dynamically opens
777 // the entry point, so if something changes, the launcher will fail
778 // unexpectedly at runtime, it is safest for the launcher to dlopen a
779 // stable exported interface.
780 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
781 // signature to change from _JVM_FindClassFromClassLoader@20 to
782 // JVM_FindClassFromClassLoader and will not be backward compatible
783 // with older JDKs.
784 // Thus a public/stable exported entry point is the right solution,
785 // public here means public in linker semantics, and is exported only
786 // to the JDK, and is not intended to be a public API.
787
788 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
789 const char* name))
790 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
791
792 // Java libraries should ensure that name is never null...
793 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
794 // It's impossible to create this class; the name cannot fit
795 // into the constant pool.
796 return NULL;
797 }
798
799 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
800 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
801 if (k == NULL) {
802 return NULL;
803 }
804
805 if (TraceClassResolution) {
806 trace_class_resolution(k);
807 }
808 return (jclass) JNIHandles::make_local(env, k->java_mirror());
809 JVM_END
810
811 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
812 jboolean init, jobject loader,
813 jboolean throwError))
814 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
815 throwError ? "error" : "exception");
816 // Java libraries should ensure that name is never null...
817 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
818 // It's impossible to create this class; the name cannot fit
819 // into the constant pool.
820 if (throwError) {
821 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
822 } else {
823 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
824 }
825 }
826 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
827 Handle h_loader(THREAD, JNIHandles::resolve(loader));
828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
829 Handle(), throwError, THREAD);
830
831 if (TraceClassResolution && result != NULL) {
832 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
833 }
834 return result;
835 JVM_END
836
837
838 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
839 jboolean init, jclass from))
840 JVMWrapper2("JVM_FindClassFromClass %s", name);
841 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
842 // It's impossible to create this class; the name cannot fit
843 // into the constant pool.
844 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
845 }
846 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
847 oop from_class_oop = JNIHandles::resolve(from);
848 Klass* from_class = (from_class_oop == NULL)
849 ? (Klass*)NULL
850 : java_lang_Class::as_Klass(from_class_oop);
851 oop class_loader = NULL;
852 oop protection_domain = NULL;
853 if (from_class != NULL) {
854 class_loader = from_class->class_loader();
855 protection_domain = from_class->protection_domain();
856 }
857 Handle h_loader(THREAD, class_loader);
858 Handle h_prot (THREAD, protection_domain);
859 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
860 h_prot, true, thread);
861
862 if (TraceClassResolution && result != NULL) {
863 // this function is generally only used for class loading during verification.
864 ResourceMark rm;
865 oop from_mirror = JNIHandles::resolve_non_null(from);
866 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
867 const char * from_name = from_class->external_name();
868
869 oop mirror = JNIHandles::resolve_non_null(result);
870 Klass* to_class = java_lang_Class::as_Klass(mirror);
871 const char * to = to_class->external_name();
872 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
873 }
874
875 return result;
876 JVM_END
877
878 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
879 if (loader.is_null()) {
880 return;
881 }
882
883 // check whether the current caller thread holds the lock or not.
884 // If not, increment the corresponding counter
885 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
886 ObjectSynchronizer::owner_self) {
887 counter->inc();
888 }
889 }
890
891 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
892 // and JVM_DefineClassWithSourceCond()
893 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
894 jobject loader, const jbyte *buf,
895 jsize len, jobject pd, const char *source,
896 jboolean verify, TRAPS) {
897 if (source == NULL) source = "__JVM_DefineClass__";
898
899 assert(THREAD->is_Java_thread(), "must be a JavaThread");
900 JavaThread* jt = (JavaThread*) THREAD;
901
902 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
903 ClassLoader::perf_define_appclass_selftime(),
904 ClassLoader::perf_define_appclasses(),
905 jt->get_thread_stat()->perf_recursion_counts_addr(),
906 jt->get_thread_stat()->perf_timers_addr(),
907 PerfClassTraceTime::DEFINE_CLASS);
908
909 if (UsePerfData) {
910 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
911 }
912
913 // Since exceptions can be thrown, class initialization can take place
914 // if name is NULL no check for class name in .class stream has to be made.
915 TempNewSymbol class_name = NULL;
916 if (name != NULL) {
917 const int str_len = (int)strlen(name);
918 if (str_len > Symbol::max_length()) {
919 // It's impossible to create this class; the name cannot fit
920 // into the constant pool.
921 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
922 }
923 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
924 }
925
926 ResourceMark rm(THREAD);
927 ClassFileStream st((u1*) buf, len, (char *)source);
928 Handle class_loader (THREAD, JNIHandles::resolve(loader));
929 if (UsePerfData) {
930 is_lock_held_by_thread(class_loader,
931 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
932 THREAD);
933 }
934 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
935 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
936 protection_domain, &st,
937 verify != 0,
938 CHECK_NULL);
939
940 if (TraceClassResolution && k != NULL) {
941 trace_class_resolution(k);
942 }
943
944 return (jclass) JNIHandles::make_local(env, k->java_mirror());
945 }
946
947
948 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
949 JVMWrapper2("JVM_DefineClass %s", name);
950
951 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
952 JVM_END
953
954
955 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
956 JVMWrapper2("JVM_DefineClassWithSource %s", name);
957
958 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
959 JVM_END
960
961 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
962 jobject loader, const jbyte *buf,
963 jsize len, jobject pd,
964 const char *source, jboolean verify))
965 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
966
967 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
968 JVM_END
969
970 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
971 JVMWrapper("JVM_FindLoadedClass");
972 ResourceMark rm(THREAD);
973
974 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
975 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
976
977 const char* str = java_lang_String::as_utf8_string(string());
978 // Sanity check, don't expect null
979 if (str == NULL) return NULL;
980
981 const int str_len = (int)strlen(str);
982 if (str_len > Symbol::max_length()) {
983 // It's impossible to create this class; the name cannot fit
984 // into the constant pool.
985 return NULL;
986 }
987 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
988
989 // Security Note:
990 // The Java level wrapper will perform the necessary security check allowing
991 // us to pass the NULL as the initiating class loader.
992 Handle h_loader(THREAD, JNIHandles::resolve(loader));
993 if (UsePerfData) {
994 is_lock_held_by_thread(h_loader,
995 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
996 THREAD);
997 }
998
999 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1000 h_loader,
1001 Handle(),
1002 CHECK_NULL);
1003 #if INCLUDE_CDS
1004 if (k == NULL) {
1005 // If the class is not already loaded, try to see if it's in the shared
1006 // archive for the current classloader (h_loader).
1007 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1008 klass_name, h_loader, CHECK_NULL);
1009 k = ik();
1010 }
1011 #endif
1012 return (k == NULL) ? NULL :
1013 (jclass) JNIHandles::make_local(env, k->java_mirror());
1014 JVM_END
1015
1016
1017 // Reflection support //////////////////////////////////////////////////////////////////////////////
1018
1019 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1020 assert (cls != NULL, "illegal class");
1021 JVMWrapper("JVM_GetClassName");
1022 JvmtiVMObjectAllocEventCollector oam;
1023 ResourceMark rm(THREAD);
1024 const char* name;
1025 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1026 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1027 } else {
1028 // Consider caching interned string in Klass
1029 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1030 assert(k->is_klass(), "just checking");
1031 name = k->external_name();
1032 }
1033 oop result = StringTable::intern((char*) name, CHECK_NULL);
1034 return (jstring) JNIHandles::make_local(env, result);
1035 JVM_END
1036
1037
1038 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1039 JVMWrapper("JVM_GetClassInterfaces");
1040 JvmtiVMObjectAllocEventCollector oam;
1041 oop mirror = JNIHandles::resolve_non_null(cls);
1042
1043 // Special handling for primitive objects
1044 if (java_lang_Class::is_primitive(mirror)) {
1045 // Primitive objects does not have any interfaces
1046 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1047 return (jobjectArray) JNIHandles::make_local(env, r);
1048 }
1049
1050 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1051 // Figure size of result array
1052 int size;
1053 if (klass->oop_is_instance()) {
1054 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1055 } else {
1056 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1057 size = 2;
1058 }
1059
1060 // Allocate result array
1061 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1062 objArrayHandle result (THREAD, r);
1063 // Fill in result
1064 if (klass->oop_is_instance()) {
1065 // Regular instance klass, fill in all local interfaces
1066 for (int index = 0; index < size; index++) {
1067 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1068 result->obj_at_put(index, k->java_mirror());
1069 }
1070 } else {
1071 // All arrays implement java.lang.Cloneable and java.io.Serializable
1072 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1073 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1074 }
1075 return (jobjectArray) JNIHandles::make_local(env, result());
1076 JVM_END
1077
1078
1079 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1080 JVMWrapper("JVM_GetClassLoader");
1081 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1082 return NULL;
1083 }
1084 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1085 oop loader = k->class_loader();
1086 return JNIHandles::make_local(env, loader);
1087 JVM_END
1088
1089
1090 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1091 JVMWrapper("JVM_IsInterface");
1092 oop mirror = JNIHandles::resolve_non_null(cls);
1093 if (java_lang_Class::is_primitive(mirror)) {
1094 return JNI_FALSE;
1095 }
1096 Klass* k = java_lang_Class::as_Klass(mirror);
1097 jboolean result = k->is_interface();
1098 assert(!result || k->oop_is_instance(),
1099 "all interfaces are instance types");
1100 // The compiler intrinsic for isInterface tests the
1101 // Klass::_access_flags bits in the same way.
1102 return result;
1103 JVM_END
1104
1105
1106 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1107 JVMWrapper("JVM_GetClassSigners");
1108 JvmtiVMObjectAllocEventCollector oam;
1109 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1110 // There are no signers for primitive types
1111 return NULL;
1112 }
1113
1114 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1115
1116 // If there are no signers set in the class, or if the class
1117 // is an array, return NULL.
1118 if (signers == NULL) return NULL;
1119
1120 // copy of the signers array
1121 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1122 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1123 for (int index = 0; index < signers->length(); index++) {
1124 signers_copy->obj_at_put(index, signers->obj_at(index));
1125 }
1126
1127 // return the copy
1128 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1129 JVM_END
1130
1131
1132 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1133 JVMWrapper("JVM_SetClassSigners");
1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1135 // This call is ignored for primitive types and arrays.
1136 // Signers are only set once, ClassLoader.java, and thus shouldn't
1137 // be called with an array. Only the bootstrap loader creates arrays.
1138 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1139 if (k->oop_is_instance()) {
1140 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1141 }
1142 }
1143 JVM_END
1144
1145
1146 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1147 JVMWrapper("JVM_GetProtectionDomain");
1148 if (JNIHandles::resolve(cls) == NULL) {
1149 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1150 }
1151
1152 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1153 // Primitive types does not have a protection domain.
1154 return NULL;
1155 }
1156
1157 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1158 return (jobject) JNIHandles::make_local(env, pd);
1159 JVM_END
1160
1161
1162 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1163 // If there is a security manager and protection domain, check the access
1164 // in the protection domain, otherwise it is authorized.
1165 if (java_lang_System::has_security_manager()) {
1166
1167 // For bootstrapping, if pd implies method isn't in the JDK, allow
1168 // this context to revert to older behavior.
1169 // In this case the isAuthorized field in AccessControlContext is also not
1170 // present.
1171 if (Universe::protection_domain_implies_method() == NULL) {
1172 return true;
1173 }
1174
1175 // Whitelist certain access control contexts
1176 if (java_security_AccessControlContext::is_authorized(context)) {
1177 return true;
1178 }
1179
1180 oop prot = klass->protection_domain();
1181 if (prot != NULL) {
1182 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1183 // in the new wrapper.
1184 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1185 Handle h_prot(THREAD, prot);
1186 JavaValue result(T_BOOLEAN);
1187 JavaCallArguments args(h_prot);
1188 JavaCalls::call(&result, m, &args, CHECK_false);
1189 return (result.get_jboolean() != 0);
1190 }
1191 }
1192 return true;
1193 }
1194
1195 // Create an AccessControlContext with a protection domain with null codesource
1196 // and null permissions - which gives no permissions.
1197 oop create_dummy_access_control_context(TRAPS) {
1198 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1199 // new ProtectionDomain(null,null);
1200 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1201 Handle null_pd(THREAD, null_protection_domain);
1202
1203 // new ProtectionDomain[] {pd};
1204 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1205 context->obj_at_put(0, null_pd());
1206
1207 // new AccessControlContext(new ProtectionDomain[] {pd})
1208 objArrayHandle h_context(THREAD, context);
1209 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1210 return result;
1211 }
1212
1213 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1214 JVMWrapper("JVM_DoPrivileged");
1215
1216 if (action == NULL) {
1217 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1218 }
1219
1220 // Compute the frame initiating the do privileged operation and setup the privileged stack
1221 vframeStream vfst(thread);
1222 vfst.security_get_caller_frame(1);
1223
1224 if (vfst.at_end()) {
1225 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1226 }
1227
1228 Method* method = vfst.method();
1229 instanceKlassHandle klass (THREAD, method->method_holder());
1230
1231 // Check that action object understands "Object run()"
1232 Handle h_context;
1233 if (context != NULL) {
1234 h_context = Handle(THREAD, JNIHandles::resolve(context));
1235 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1236 if (!authorized) {
1237 // Create an unprivileged access control object and call it's run function
1238 // instead.
1239 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1240 h_context = Handle(THREAD, noprivs);
1241 }
1242 }
1243
1244 // Check that action object understands "Object run()"
1245 Handle object (THREAD, JNIHandles::resolve(action));
1246
1247 // get run() method
1248 Method* m_oop = object->klass()->uncached_lookup_method(
1249 vmSymbols::run_method_name(),
1250 vmSymbols::void_object_signature(),
1251 Klass::normal);
1252 methodHandle m (THREAD, m_oop);
1253 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1254 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1255 }
1256
1257 // Stack allocated list of privileged stack elements
1258 PrivilegedElement pi;
1259 if (!vfst.at_end()) {
1260 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1261 thread->set_privileged_stack_top(&pi);
1262 }
1263
1264
1265 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1266 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1267 Handle pending_exception;
1268 JavaValue result(T_OBJECT);
1269 JavaCallArguments args(object);
1270 JavaCalls::call(&result, m, &args, THREAD);
1271
1272 // done with action, remove ourselves from the list
1273 if (!vfst.at_end()) {
1274 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1275 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1276 }
1277
1278 if (HAS_PENDING_EXCEPTION) {
1279 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1280 CLEAR_PENDING_EXCEPTION;
1281
1282 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1283 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1284 // Throw a java.security.PrivilegedActionException(Exception e) exception
1285 JavaCallArguments args(pending_exception);
1286 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1287 vmSymbols::exception_void_signature(),
1288 &args);
1289 }
1290 }
1291
1292 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1293 return JNIHandles::make_local(env, (oop) result.get_jobject());
1294 JVM_END
1295
1296
1297 // Returns the inherited_access_control_context field of the running thread.
1298 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1299 JVMWrapper("JVM_GetInheritedAccessControlContext");
1300 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1301 return JNIHandles::make_local(env, result);
1302 JVM_END
1303
1304 class RegisterArrayForGC {
1305 private:
1306 JavaThread *_thread;
1307 public:
1308 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1309 _thread = thread;
1310 _thread->register_array_for_gc(array);
1311 }
1312
1313 ~RegisterArrayForGC() {
1314 _thread->register_array_for_gc(NULL);
1315 }
1316 };
1317
1318
1319 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1320 JVMWrapper("JVM_GetStackAccessControlContext");
1321 if (!UsePrivilegedStack) return NULL;
1322
1323 ResourceMark rm(THREAD);
1324 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1325 JvmtiVMObjectAllocEventCollector oam;
1326
1327 // count the protection domains on the execution stack. We collapse
1328 // duplicate consecutive protection domains into a single one, as
1329 // well as stopping when we hit a privileged frame.
1330
1331 // Use vframeStream to iterate through Java frames
1332 vframeStream vfst(thread);
1333
1334 oop previous_protection_domain = NULL;
1335 Handle privileged_context(thread, NULL);
1336 bool is_privileged = false;
1337 oop protection_domain = NULL;
1338
1339 for(; !vfst.at_end(); vfst.next()) {
1340 // get method of frame
1341 Method* method = vfst.method();
1342 intptr_t* frame_id = vfst.frame_id();
1343
1344 // check the privileged frames to see if we have a match
1345 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1346 // this frame is privileged
1347 is_privileged = true;
1348 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1349 protection_domain = thread->privileged_stack_top()->protection_domain();
1350 } else {
1351 protection_domain = method->method_holder()->protection_domain();
1352 }
1353
1354 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1355 local_array->push(protection_domain);
1356 previous_protection_domain = protection_domain;
1357 }
1358
1359 if (is_privileged) break;
1360 }
1361
1362
1363 // either all the domains on the stack were system domains, or
1364 // we had a privileged system domain
1365 if (local_array->is_empty()) {
1366 if (is_privileged && privileged_context.is_null()) return NULL;
1367
1368 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1369 return JNIHandles::make_local(env, result);
1370 }
1371
1372 // the resource area must be registered in case of a gc
1373 RegisterArrayForGC ragc(thread, local_array);
1374 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1375 local_array->length(), CHECK_NULL);
1376 objArrayHandle h_context(thread, context);
1377 for (int index = 0; index < local_array->length(); index++) {
1378 h_context->obj_at_put(index, local_array->at(index));
1379 }
1380
1381 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1382
1383 return JNIHandles::make_local(env, result);
1384 JVM_END
1385
1386
1387 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1388 JVMWrapper("JVM_IsArrayClass");
1389 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1390 return (k != NULL) && k->oop_is_array() ? true : false;
1391 JVM_END
1392
1393
1394 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1395 JVMWrapper("JVM_IsPrimitiveClass");
1396 oop mirror = JNIHandles::resolve_non_null(cls);
1397 return (jboolean) java_lang_Class::is_primitive(mirror);
1398 JVM_END
1399
1400
1401 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1402 JVMWrapper("JVM_GetComponentType");
1403 oop mirror = JNIHandles::resolve_non_null(cls);
1404 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1405 return (jclass) JNIHandles::make_local(env, result);
1406 JVM_END
1407
1408
1409 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1410 JVMWrapper("JVM_GetClassModifiers");
1411 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1412 // Primitive type
1413 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1414 }
1415
1416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1417 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1418 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1419 return k->modifier_flags();
1420 JVM_END
1421
1422
1423 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1424
1425 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1426 JvmtiVMObjectAllocEventCollector oam;
1427 // ofClass is a reference to a java_lang_Class object. The mirror object
1428 // of an InstanceKlass
1429
1430 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1431 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1432 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1433 return (jobjectArray)JNIHandles::make_local(env, result);
1434 }
1435
1436 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1437 InnerClassesIterator iter(k);
1438
1439 if (iter.length() == 0) {
1440 // Neither an inner nor outer class
1441 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1442 return (jobjectArray)JNIHandles::make_local(env, result);
1443 }
1444
1445 // find inner class info
1446 constantPoolHandle cp(thread, k->constants());
1447 int length = iter.length();
1448
1449 // Allocate temp. result array
1450 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1451 objArrayHandle result (THREAD, r);
1452 int members = 0;
1453
1454 for (; !iter.done(); iter.next()) {
1455 int ioff = iter.inner_class_info_index();
1456 int ooff = iter.outer_class_info_index();
1457
1458 if (ioff != 0 && ooff != 0) {
1459 // Check to see if the name matches the class we're looking for
1460 // before attempting to find the class.
1461 if (cp->klass_name_at_matches(k, ooff)) {
1462 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1463 if (outer_klass == k()) {
1464 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1465 instanceKlassHandle inner_klass (THREAD, ik);
1466
1467 // Throws an exception if outer klass has not declared k as
1468 // an inner klass
1469 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1470
1471 result->obj_at_put(members, inner_klass->java_mirror());
1472 members++;
1473 }
1474 }
1475 }
1476 }
1477
1478 if (members != length) {
1479 // Return array of right length
1480 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1481 for(int i = 0; i < members; i++) {
1482 res->obj_at_put(i, result->obj_at(i));
1483 }
1484 return (jobjectArray)JNIHandles::make_local(env, res);
1485 }
1486
1487 return (jobjectArray)JNIHandles::make_local(env, result());
1488 JVM_END
1489
1490
1491 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1492 {
1493 // ofClass is a reference to a java_lang_Class object.
1494 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1495 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1496 return NULL;
1497 }
1498
1499 bool inner_is_member = false;
1500 Klass* outer_klass
1501 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1502 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1503 if (outer_klass == NULL) return NULL; // already a top-level class
1504 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1505 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1506 }
1507 JVM_END
1508
1509 // should be in InstanceKlass.cpp, but is here for historical reasons
1510 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1511 bool* inner_is_member,
1512 TRAPS) {
1513 Thread* thread = THREAD;
1514 InnerClassesIterator iter(k);
1515 if (iter.length() == 0) {
1516 // No inner class info => no declaring class
1517 return NULL;
1518 }
1519
1520 constantPoolHandle i_cp(thread, k->constants());
1521
1522 bool found = false;
1523 Klass* ok;
1524 instanceKlassHandle outer_klass;
1525 *inner_is_member = false;
1526
1527 // Find inner_klass attribute
1528 for (; !iter.done() && !found; iter.next()) {
1529 int ioff = iter.inner_class_info_index();
1530 int ooff = iter.outer_class_info_index();
1531 int noff = iter.inner_name_index();
1532 if (ioff != 0) {
1533 // Check to see if the name matches the class we're looking for
1534 // before attempting to find the class.
1535 if (i_cp->klass_name_at_matches(k, ioff)) {
1536 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1537 found = (k() == inner_klass);
1538 if (found && ooff != 0) {
1539 ok = i_cp->klass_at(ooff, CHECK_NULL);
1540 outer_klass = instanceKlassHandle(thread, ok);
1541 *inner_is_member = true;
1542 }
1543 }
1544 }
1545 }
1546
1547 if (found && outer_klass.is_null()) {
1548 // It may be anonymous; try for that.
1549 int encl_method_class_idx = k->enclosing_method_class_index();
1550 if (encl_method_class_idx != 0) {
1551 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1552 outer_klass = instanceKlassHandle(thread, ok);
1553 *inner_is_member = false;
1554 }
1555 }
1556
1557 // If no inner class attribute found for this class.
1558 if (outer_klass.is_null()) return NULL;
1559
1560 // Throws an exception if outer klass has not declared k as an inner klass
1561 // We need evidence that each klass knows about the other, or else
1562 // the system could allow a spoof of an inner class to gain access rights.
1563 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1564 return outer_klass();
1565 }
1566
1567 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1568 assert (cls != NULL, "illegal class");
1569 JVMWrapper("JVM_GetClassSignature");
1570 JvmtiVMObjectAllocEventCollector oam;
1571 ResourceMark rm(THREAD);
1572 // Return null for arrays and primatives
1573 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1575 if (k->oop_is_instance()) {
1576 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1577 if (sym == NULL) return NULL;
1578 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1579 return (jstring) JNIHandles::make_local(env, str());
1580 }
1581 }
1582 return NULL;
1583 JVM_END
1584
1585
1586 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1587 assert (cls != NULL, "illegal class");
1588 JVMWrapper("JVM_GetClassAnnotations");
1589
1590 // Return null for arrays and primitives
1591 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1593 if (k->oop_is_instance()) {
1594 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1595 return (jbyteArray) JNIHandles::make_local(env, a);
1596 }
1597 }
1598 return NULL;
1599 JVM_END
1600
1601
1602 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1603 // some of this code was adapted from from jni_FromReflectedField
1604
1605 oop reflected = JNIHandles::resolve_non_null(field);
1606 oop mirror = java_lang_reflect_Field::clazz(reflected);
1607 Klass* k = java_lang_Class::as_Klass(mirror);
1608 int slot = java_lang_reflect_Field::slot(reflected);
1609 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1610
1611 KlassHandle kh(THREAD, k);
1612 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1613
1614 if (modifiers & JVM_ACC_STATIC) {
1615 // for static fields we only look in the current class
1616 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1617 assert(false, "cannot find static field");
1618 return false;
1619 }
1620 } else {
1621 // for instance fields we start with the current class and work
1622 // our way up through the superclass chain
1623 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1624 assert(false, "cannot find instance field");
1625 return false;
1626 }
1627 }
1628 return true;
1629 }
1630
1631 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1632 // field is a handle to a java.lang.reflect.Field object
1633 assert(field != NULL, "illegal field");
1634 JVMWrapper("JVM_GetFieldAnnotations");
1635
1636 fieldDescriptor fd;
1637 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1638 if (!gotFd) {
1639 return NULL;
1640 }
1641
1642 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1643 JVM_END
1644
1645
1646 static Method* jvm_get_method_common(jobject method) {
1647 // some of this code was adapted from from jni_FromReflectedMethod
1648
1649 oop reflected = JNIHandles::resolve_non_null(method);
1650 oop mirror = NULL;
1651 int slot = 0;
1652
1653 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1654 mirror = java_lang_reflect_Constructor::clazz(reflected);
1655 slot = java_lang_reflect_Constructor::slot(reflected);
1656 } else {
1657 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1658 "wrong type");
1659 mirror = java_lang_reflect_Method::clazz(reflected);
1660 slot = java_lang_reflect_Method::slot(reflected);
1661 }
1662 Klass* k = java_lang_Class::as_Klass(mirror);
1663
1664 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1665 assert(m != NULL, "cannot find method");
1666 return m; // caller has to deal with NULL in product mode
1667 }
1668
1669
1670 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1671 JVMWrapper("JVM_GetMethodAnnotations");
1672
1673 // method is a handle to a java.lang.reflect.Method object
1674 Method* m = jvm_get_method_common(method);
1675 if (m == NULL) {
1676 return NULL;
1677 }
1678
1679 return (jbyteArray) JNIHandles::make_local(env,
1680 Annotations::make_java_array(m->annotations(), THREAD));
1681 JVM_END
1682
1683
1684 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1685 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1686
1687 // method is a handle to a java.lang.reflect.Method object
1688 Method* m = jvm_get_method_common(method);
1689 if (m == NULL) {
1690 return NULL;
1691 }
1692
1693 return (jbyteArray) JNIHandles::make_local(env,
1694 Annotations::make_java_array(m->annotation_default(), THREAD));
1695 JVM_END
1696
1697
1698 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1699 JVMWrapper("JVM_GetMethodParameterAnnotations");
1700
1701 // method is a handle to a java.lang.reflect.Method object
1702 Method* m = jvm_get_method_common(method);
1703 if (m == NULL) {
1704 return NULL;
1705 }
1706
1707 return (jbyteArray) JNIHandles::make_local(env,
1708 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1709 JVM_END
1710
1711 /* Type use annotations support (JDK 1.8) */
1712
1713 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1714 assert (cls != NULL, "illegal class");
1715 JVMWrapper("JVM_GetClassTypeAnnotations");
1716 ResourceMark rm(THREAD);
1717 // Return null for arrays and primitives
1718 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1719 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1720 if (k->oop_is_instance()) {
1721 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1722 if (type_annotations != NULL) {
1723 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1724 return (jbyteArray) JNIHandles::make_local(env, a);
1725 }
1726 }
1727 }
1728 return NULL;
1729 JVM_END
1730
1731 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1732 assert (method != NULL, "illegal method");
1733 JVMWrapper("JVM_GetMethodTypeAnnotations");
1734
1735 // method is a handle to a java.lang.reflect.Method object
1736 Method* m = jvm_get_method_common(method);
1737 if (m == NULL) {
1738 return NULL;
1739 }
1740
1741 AnnotationArray* type_annotations = m->type_annotations();
1742 if (type_annotations != NULL) {
1743 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1744 return (jbyteArray) JNIHandles::make_local(env, a);
1745 }
1746
1747 return NULL;
1748 JVM_END
1749
1750 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1751 assert (field != NULL, "illegal field");
1752 JVMWrapper("JVM_GetFieldTypeAnnotations");
1753
1754 fieldDescriptor fd;
1755 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1756 if (!gotFd) {
1757 return NULL;
1758 }
1759
1760 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1761 JVM_END
1762
1763 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1764 if (!cp->is_within_bounds(index)) {
1765 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1766 }
1767 }
1768
1769 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1770 {
1771 JVMWrapper("JVM_GetMethodParameters");
1772 // method is a handle to a java.lang.reflect.Method object
1773 Method* method_ptr = jvm_get_method_common(method);
1774 methodHandle mh (THREAD, method_ptr);
1775 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1776 const int num_params = mh->method_parameters_length();
1777
1778 if (0 != num_params) {
1779 // make sure all the symbols are properly formatted
1780 for (int i = 0; i < num_params; i++) {
1781 MethodParametersElement* params = mh->method_parameters_start();
1782 int index = params[i].name_cp_index;
1783 bounds_check(mh->constants(), index, CHECK_NULL);
1784
1785 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1786 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1787 "Wrong type at constant pool index");
1788 }
1789
1790 }
1791
1792 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1793 objArrayHandle result (THREAD, result_oop);
1794
1795 for (int i = 0; i < num_params; i++) {
1796 MethodParametersElement* params = mh->method_parameters_start();
1797 // For a 0 index, give a NULL symbol
1798 Symbol* sym = 0 != params[i].name_cp_index ?
1799 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1800 int flags = params[i].flags;
1801 oop param = Reflection::new_parameter(reflected_method, i, sym,
1802 flags, CHECK_NULL);
1803 result->obj_at_put(i, param);
1804 }
1805 return (jobjectArray)JNIHandles::make_local(env, result());
1806 } else {
1807 return (jobjectArray)NULL;
1808 }
1809 }
1810 JVM_END
1811
1812 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1813
1814 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1815 {
1816 JVMWrapper("JVM_GetClassDeclaredFields");
1817 JvmtiVMObjectAllocEventCollector oam;
1818
1819 // Exclude primitive types and array types
1820 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1821 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1822 // Return empty array
1823 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1824 return (jobjectArray) JNIHandles::make_local(env, res);
1825 }
1826
1827 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1828 constantPoolHandle cp(THREAD, k->constants());
1829
1830 // Ensure class is linked
1831 k->link_class(CHECK_NULL);
1832
1833 // 4496456 We need to filter out java.lang.Throwable.backtrace
1834 bool skip_backtrace = false;
1835
1836 // Allocate result
1837 int num_fields;
1838
1839 if (publicOnly) {
1840 num_fields = 0;
1841 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1842 if (fs.access_flags().is_public()) ++num_fields;
1843 }
1844 } else {
1845 num_fields = k->java_fields_count();
1846
1847 if (k() == SystemDictionary::Throwable_klass()) {
1848 num_fields--;
1849 skip_backtrace = true;
1850 }
1851 }
1852
1853 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1854 objArrayHandle result (THREAD, r);
1855
1856 int out_idx = 0;
1857 fieldDescriptor fd;
1858 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1859 if (skip_backtrace) {
1860 // 4496456 skip java.lang.Throwable.backtrace
1861 int offset = fs.offset();
1862 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1863 }
1864
1865 if (!publicOnly || fs.access_flags().is_public()) {
1866 fd.reinitialize(k(), fs.index());
1867 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1868 result->obj_at_put(out_idx, field);
1869 ++out_idx;
1870 }
1871 }
1872 assert(out_idx == num_fields, "just checking");
1873 return (jobjectArray) JNIHandles::make_local(env, result());
1874 }
1875 JVM_END
1876
1877 static bool select_method(methodHandle method, bool want_constructor) {
1878 if (want_constructor) {
1879 return (method->is_initializer() && !method->is_static());
1880 } else {
1881 return (!method->is_initializer() && !method->is_overpass());
1882 }
1883 }
1884
1885 static jobjectArray get_class_declared_methods_helper(
1886 JNIEnv *env,
1887 jclass ofClass, jboolean publicOnly,
1888 bool want_constructor,
1889 Klass* klass, TRAPS) {
1890
1891 JvmtiVMObjectAllocEventCollector oam;
1892
1893 // Exclude primitive types and array types
1894 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1895 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1896 // Return empty array
1897 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1898 return (jobjectArray) JNIHandles::make_local(env, res);
1899 }
1900
1901 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1902
1903 // Ensure class is linked
1904 k->link_class(CHECK_NULL);
1905
1906 Array<Method*>* methods = k->methods();
1907 int methods_length = methods->length();
1908
1909 // Save original method_idnum in case of redefinition, which can change
1910 // the idnum of obsolete methods. The new method will have the same idnum
1911 // but if we refresh the methods array, the counts will be wrong.
1912 ResourceMark rm(THREAD);
1913 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1914 int num_methods = 0;
1915
1916 for (int i = 0; i < methods_length; i++) {
1917 methodHandle method(THREAD, methods->at(i));
1918 if (select_method(method, want_constructor)) {
1919 if (!publicOnly || method->is_public()) {
1920 idnums->push(method->method_idnum());
1921 ++num_methods;
1922 }
1923 }
1924 }
1925
1926 // Allocate result
1927 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1928 objArrayHandle result (THREAD, r);
1929
1930 // Now just put the methods that we selected above, but go by their idnum
1931 // in case of redefinition. The methods can be redefined at any safepoint,
1932 // so above when allocating the oop array and below when creating reflect
1933 // objects.
1934 for (int i = 0; i < num_methods; i++) {
1935 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1936 if (method.is_null()) {
1937 // Method may have been deleted and seems this API can handle null
1938 // Otherwise should probably put a method that throws NSME
1939 result->obj_at_put(i, NULL);
1940 } else {
1941 oop m;
1942 if (want_constructor) {
1943 m = Reflection::new_constructor(method, CHECK_NULL);
1944 } else {
1945 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1946 }
1947 result->obj_at_put(i, m);
1948 }
1949 }
1950
1951 return (jobjectArray) JNIHandles::make_local(env, result());
1952 }
1953
1954 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1955 {
1956 JVMWrapper("JVM_GetClassDeclaredMethods");
1957 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1958 /*want_constructor*/ false,
1959 SystemDictionary::reflect_Method_klass(), THREAD);
1960 }
1961 JVM_END
1962
1963 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1964 {
1965 JVMWrapper("JVM_GetClassDeclaredConstructors");
1966 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1967 /*want_constructor*/ true,
1968 SystemDictionary::reflect_Constructor_klass(), THREAD);
1969 }
1970 JVM_END
1971
1972 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1973 {
1974 JVMWrapper("JVM_GetClassAccessFlags");
1975 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1976 // Primitive type
1977 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1978 }
1979
1980 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1981 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1982 }
1983 JVM_END
1984
1985
1986 // Constant pool access //////////////////////////////////////////////////////////
1987
1988 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1989 {
1990 JVMWrapper("JVM_GetClassConstantPool");
1991 JvmtiVMObjectAllocEventCollector oam;
1992
1993 // Return null for primitives and arrays
1994 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1995 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1996 if (k->oop_is_instance()) {
1997 instanceKlassHandle k_h(THREAD, k);
1998 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1999 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2000 return JNIHandles::make_local(jcp());
2001 }
2002 }
2003 return NULL;
2004 }
2005 JVM_END
2006
2007
2008 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2009 {
2010 JVMWrapper("JVM_ConstantPoolGetSize");
2011 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2012 return cp->length();
2013 }
2014 JVM_END
2015
2016
2017 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2018 {
2019 JVMWrapper("JVM_ConstantPoolGetClassAt");
2020 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2021 bounds_check(cp, index, CHECK_NULL);
2022 constantTag tag = cp->tag_at(index);
2023 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2025 }
2026 Klass* k = cp->klass_at(index, CHECK_NULL);
2027 return (jclass) JNIHandles::make_local(k->java_mirror());
2028 }
2029 JVM_END
2030
2031 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2032 {
2033 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2034 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2035 bounds_check(cp, index, CHECK_NULL);
2036 constantTag tag = cp->tag_at(index);
2037 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2038 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2039 }
2040 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2041 if (k == NULL) return NULL;
2042 return (jclass) JNIHandles::make_local(k->java_mirror());
2043 }
2044 JVM_END
2045
2046 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2047 constantTag tag = cp->tag_at(index);
2048 if (!tag.is_method() && !tag.is_interface_method()) {
2049 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2050 }
2051 int klass_ref = cp->uncached_klass_ref_index_at(index);
2052 Klass* k_o;
2053 if (force_resolution) {
2054 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2055 } else {
2056 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2057 if (k_o == NULL) return NULL;
2058 }
2059 instanceKlassHandle k(THREAD, k_o);
2060 Symbol* name = cp->uncached_name_ref_at(index);
2061 Symbol* sig = cp->uncached_signature_ref_at(index);
2062 methodHandle m (THREAD, k->find_method(name, sig));
2063 if (m.is_null()) {
2064 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2065 }
2066 oop method;
2067 if (!m->is_initializer() || m->is_static()) {
2068 method = Reflection::new_method(m, true, true, CHECK_NULL);
2069 } else {
2070 method = Reflection::new_constructor(m, CHECK_NULL);
2071 }
2072 return JNIHandles::make_local(method);
2073 }
2074
2075 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2076 {
2077 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2078 JvmtiVMObjectAllocEventCollector oam;
2079 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2080 bounds_check(cp, index, CHECK_NULL);
2081 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2082 return res;
2083 }
2084 JVM_END
2085
2086 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2087 {
2088 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2089 JvmtiVMObjectAllocEventCollector oam;
2090 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2091 bounds_check(cp, index, CHECK_NULL);
2092 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2093 return res;
2094 }
2095 JVM_END
2096
2097 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2098 constantTag tag = cp->tag_at(index);
2099 if (!tag.is_field()) {
2100 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2101 }
2102 int klass_ref = cp->uncached_klass_ref_index_at(index);
2103 Klass* k_o;
2104 if (force_resolution) {
2105 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2106 } else {
2107 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2108 if (k_o == NULL) return NULL;
2109 }
2110 instanceKlassHandle k(THREAD, k_o);
2111 Symbol* name = cp->uncached_name_ref_at(index);
2112 Symbol* sig = cp->uncached_signature_ref_at(index);
2113 fieldDescriptor fd;
2114 Klass* target_klass = k->find_field(name, sig, &fd);
2115 if (target_klass == NULL) {
2116 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2117 }
2118 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2119 return JNIHandles::make_local(field);
2120 }
2121
2122 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2123 {
2124 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2125 JvmtiVMObjectAllocEventCollector oam;
2126 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127 bounds_check(cp, index, CHECK_NULL);
2128 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2129 return res;
2130 }
2131 JVM_END
2132
2133 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2136 JvmtiVMObjectAllocEventCollector oam;
2137 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2138 bounds_check(cp, index, CHECK_NULL);
2139 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2140 return res;
2141 }
2142 JVM_END
2143
2144 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2145 {
2146 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2147 JvmtiVMObjectAllocEventCollector oam;
2148 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2149 bounds_check(cp, index, CHECK_NULL);
2150 constantTag tag = cp->tag_at(index);
2151 if (!tag.is_field_or_method()) {
2152 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2153 }
2154 int klass_ref = cp->uncached_klass_ref_index_at(index);
2155 Symbol* klass_name = cp->klass_name_at(klass_ref);
2156 Symbol* member_name = cp->uncached_name_ref_at(index);
2157 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2158 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2159 objArrayHandle dest(THREAD, dest_o);
2160 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2161 dest->obj_at_put(0, str());
2162 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2163 dest->obj_at_put(1, str());
2164 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2165 dest->obj_at_put(2, str());
2166 return (jobjectArray) JNIHandles::make_local(dest());
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2171 {
2172 JVMWrapper("JVM_ConstantPoolGetIntAt");
2173 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2174 bounds_check(cp, index, CHECK_0);
2175 constantTag tag = cp->tag_at(index);
2176 if (!tag.is_int()) {
2177 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2178 }
2179 return cp->int_at(index);
2180 }
2181 JVM_END
2182
2183 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2184 {
2185 JVMWrapper("JVM_ConstantPoolGetLongAt");
2186 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187 bounds_check(cp, index, CHECK_(0L));
2188 constantTag tag = cp->tag_at(index);
2189 if (!tag.is_long()) {
2190 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2191 }
2192 return cp->long_at(index);
2193 }
2194 JVM_END
2195
2196 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2197 {
2198 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2199 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2200 bounds_check(cp, index, CHECK_(0.0f));
2201 constantTag tag = cp->tag_at(index);
2202 if (!tag.is_float()) {
2203 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2204 }
2205 return cp->float_at(index);
2206 }
2207 JVM_END
2208
2209 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2210 {
2211 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2212 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2213 bounds_check(cp, index, CHECK_(0.0));
2214 constantTag tag = cp->tag_at(index);
2215 if (!tag.is_double()) {
2216 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2217 }
2218 return cp->double_at(index);
2219 }
2220 JVM_END
2221
2222 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2223 {
2224 JVMWrapper("JVM_ConstantPoolGetStringAt");
2225 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2226 bounds_check(cp, index, CHECK_NULL);
2227 constantTag tag = cp->tag_at(index);
2228 if (!tag.is_string()) {
2229 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2230 }
2231 oop str = cp->string_at(index, CHECK_NULL);
2232 return (jstring) JNIHandles::make_local(str);
2233 }
2234 JVM_END
2235
2236 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2237 {
2238 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2239 JvmtiVMObjectAllocEventCollector oam;
2240 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2241 bounds_check(cp, index, CHECK_NULL);
2242 constantTag tag = cp->tag_at(index);
2243 if (!tag.is_symbol()) {
2244 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2245 }
2246 Symbol* sym = cp->symbol_at(index);
2247 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2248 return (jstring) JNIHandles::make_local(str());
2249 }
2250 JVM_END
2251
2252
2253 // Assertion support. //////////////////////////////////////////////////////////
2254
2255 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2256 JVMWrapper("JVM_DesiredAssertionStatus");
2257 assert(cls != NULL, "bad class");
2258
2259 oop r = JNIHandles::resolve(cls);
2260 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2261 if (java_lang_Class::is_primitive(r)) return false;
2262
2263 Klass* k = java_lang_Class::as_Klass(r);
2264 assert(k->oop_is_instance(), "must be an instance klass");
2265 if (! k->oop_is_instance()) return false;
2266
2267 ResourceMark rm(THREAD);
2268 const char* name = k->name()->as_C_string();
2269 bool system_class = k->class_loader() == NULL;
2270 return JavaAssertions::enabled(name, system_class);
2271
2272 JVM_END
2273
2274
2275 // Return a new AssertionStatusDirectives object with the fields filled in with
2276 // command-line assertion arguments (i.e., -ea, -da).
2277 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2278 JVMWrapper("JVM_AssertionStatusDirectives");
2279 JvmtiVMObjectAllocEventCollector oam;
2280 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2281 return JNIHandles::make_local(env, asd);
2282 JVM_END
2283
2284 // Verification ////////////////////////////////////////////////////////////////////////////////
2285
2286 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2287
2288 // RedefineClasses support: bug 6214132 caused verification to fail.
2289 // All functions from this section should call the jvmtiThreadSate function:
2290 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2291 // The function returns a Klass* of the _scratch_class if the verifier
2292 // was invoked in the middle of the class redefinition.
2293 // Otherwise it returns its argument value which is the _the_class Klass*.
2294 // Please, refer to the description in the jvmtiThreadSate.hpp.
2295
2296 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2297 JVMWrapper("JVM_GetClassNameUTF");
2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300 return k->name()->as_utf8();
2301 JVM_END
2302
2303
2304 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2305 JVMWrapper("JVM_GetClassCPTypes");
2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2308 // types will have length zero if this is not an InstanceKlass
2309 // (length is determined by call to JVM_GetClassCPEntriesCount)
2310 if (k->oop_is_instance()) {
2311 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2312 for (int index = cp->length() - 1; index >= 0; index--) {
2313 constantTag tag = cp->tag_at(index);
2314 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2315 }
2316 }
2317 JVM_END
2318
2319
2320 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2321 JVMWrapper("JVM_GetClassCPEntriesCount");
2322 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2323 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2324 if (!k->oop_is_instance())
2325 return 0;
2326 return InstanceKlass::cast(k)->constants()->length();
2327 JVM_END
2328
2329
2330 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2331 JVMWrapper("JVM_GetClassFieldsCount");
2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334 if (!k->oop_is_instance())
2335 return 0;
2336 return InstanceKlass::cast(k)->java_fields_count();
2337 JVM_END
2338
2339
2340 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2341 JVMWrapper("JVM_GetClassMethodsCount");
2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344 if (!k->oop_is_instance())
2345 return 0;
2346 return InstanceKlass::cast(k)->methods()->length();
2347 JVM_END
2348
2349
2350 // The following methods, used for the verifier, are never called with
2351 // array klasses, so a direct cast to InstanceKlass is safe.
2352 // Typically, these methods are called in a loop with bounds determined
2353 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2354 // zero for arrays.
2355 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2356 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2360 int length = method->checked_exceptions_length();
2361 if (length > 0) {
2362 CheckedExceptionElement* table= method->checked_exceptions_start();
2363 for (int i = 0; i < length; i++) {
2364 exceptions[i] = table[i].class_cp_index;
2365 }
2366 }
2367 JVM_END
2368
2369
2370 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2371 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2372 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2373 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2374 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2375 return method->checked_exceptions_length();
2376 JVM_END
2377
2378
2379 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2380 JVMWrapper("JVM_GetMethodIxByteCode");
2381 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2382 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2383 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2384 memcpy(code, method->code_base(), method->code_size());
2385 JVM_END
2386
2387
2388 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2389 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 return method->code_size();
2394 JVM_END
2395
2396
2397 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2398 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2401 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2402 ExceptionTable extable(method);
2403 entry->start_pc = extable.start_pc(entry_index);
2404 entry->end_pc = extable.end_pc(entry_index);
2405 entry->handler_pc = extable.handler_pc(entry_index);
2406 entry->catchType = extable.catch_type_index(entry_index);
2407 JVM_END
2408
2409
2410 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2411 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2412 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2413 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2414 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2415 return method->exception_table_length();
2416 JVM_END
2417
2418
2419 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2420 JVMWrapper("JVM_GetMethodIxModifiers");
2421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2422 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2423 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2424 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2425 JVM_END
2426
2427
2428 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2429 JVMWrapper("JVM_GetFieldIxModifiers");
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2433 JVM_END
2434
2435
2436 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2437 JVMWrapper("JVM_GetMethodIxLocalsCount");
2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2440 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2441 return method->max_locals();
2442 JVM_END
2443
2444
2445 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2446 JVMWrapper("JVM_GetMethodIxArgsSize");
2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2450 return method->size_of_parameters();
2451 JVM_END
2452
2453
2454 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2455 JVMWrapper("JVM_GetMethodIxMaxStack");
2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2459 return method->verifier_max_stack();
2460 JVM_END
2461
2462
2463 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2464 JVMWrapper("JVM_IsConstructorIx");
2465 ResourceMark rm(THREAD);
2466 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2467 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2468 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2469 return method->name() == vmSymbols::object_initializer_name();
2470 JVM_END
2471
2472
2473 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2474 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2475 ResourceMark rm(THREAD);
2476 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2477 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2478 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2479 return method->is_overpass();
2480 JVM_END
2481
2482 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2483 JVMWrapper("JVM_GetMethodIxIxUTF");
2484 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2485 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2486 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2487 return method->name()->as_utf8();
2488 JVM_END
2489
2490
2491 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2492 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2493 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2494 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2495 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2496 return method->signature()->as_utf8();
2497 JVM_END
2498
2499 /**
2500 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2501 * read entries in the constant pool. Since the old verifier always
2502 * works on a copy of the code, it will not see any rewriting that
2503 * may possibly occur in the middle of verification. So it is important
2504 * that nothing it calls tries to use the cpCache instead of the raw
2505 * constant pool, so we must use cp->uncached_x methods when appropriate.
2506 */
2507 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2508 JVMWrapper("JVM_GetCPFieldNameUTF");
2509 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2510 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2511 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2512 switch (cp->tag_at(cp_index).value()) {
2513 case JVM_CONSTANT_Fieldref:
2514 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2515 default:
2516 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2517 }
2518 ShouldNotReachHere();
2519 return NULL;
2520 JVM_END
2521
2522
2523 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2524 JVMWrapper("JVM_GetCPMethodNameUTF");
2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2527 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2528 switch (cp->tag_at(cp_index).value()) {
2529 case JVM_CONSTANT_InterfaceMethodref:
2530 case JVM_CONSTANT_Methodref:
2531 case JVM_CONSTANT_NameAndType: // for invokedynamic
2532 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2533 default:
2534 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2535 }
2536 ShouldNotReachHere();
2537 return NULL;
2538 JVM_END
2539
2540
2541 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2542 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2543 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2544 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2545 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2546 switch (cp->tag_at(cp_index).value()) {
2547 case JVM_CONSTANT_InterfaceMethodref:
2548 case JVM_CONSTANT_Methodref:
2549 case JVM_CONSTANT_NameAndType: // for invokedynamic
2550 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2551 default:
2552 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2553 }
2554 ShouldNotReachHere();
2555 return NULL;
2556 JVM_END
2557
2558
2559 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2560 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2561 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2562 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2563 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2564 switch (cp->tag_at(cp_index).value()) {
2565 case JVM_CONSTANT_Fieldref:
2566 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2567 default:
2568 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2569 }
2570 ShouldNotReachHere();
2571 return NULL;
2572 JVM_END
2573
2574
2575 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2576 JVMWrapper("JVM_GetCPClassNameUTF");
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2579 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2580 Symbol* classname = cp->klass_name_at(cp_index);
2581 return classname->as_utf8();
2582 JVM_END
2583
2584
2585 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2586 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2588 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2589 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2590 switch (cp->tag_at(cp_index).value()) {
2591 case JVM_CONSTANT_Fieldref: {
2592 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2593 Symbol* classname = cp->klass_name_at(class_index);
2594 return classname->as_utf8();
2595 }
2596 default:
2597 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2598 }
2599 ShouldNotReachHere();
2600 return NULL;
2601 JVM_END
2602
2603
2604 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2605 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2607 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2608 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2609 switch (cp->tag_at(cp_index).value()) {
2610 case JVM_CONSTANT_Methodref:
2611 case JVM_CONSTANT_InterfaceMethodref: {
2612 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2613 Symbol* classname = cp->klass_name_at(class_index);
2614 return classname->as_utf8();
2615 }
2616 default:
2617 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2618 }
2619 ShouldNotReachHere();
2620 return NULL;
2621 JVM_END
2622
2623
2624 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2625 JVMWrapper("JVM_GetCPFieldModifiers");
2626 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2627 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2628 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2629 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2630 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2631 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2632 switch (cp->tag_at(cp_index).value()) {
2633 case JVM_CONSTANT_Fieldref: {
2634 Symbol* name = cp->uncached_name_ref_at(cp_index);
2635 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2636 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2637 if (fs.name() == name && fs.signature() == signature) {
2638 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2639 }
2640 }
2641 return -1;
2642 }
2643 default:
2644 fatal("JVM_GetCPFieldModifiers: illegal constant");
2645 }
2646 ShouldNotReachHere();
2647 return 0;
2648 JVM_END
2649
2650
2651 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2652 JVMWrapper("JVM_GetCPMethodModifiers");
2653 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2654 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2655 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2656 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2657 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2658 switch (cp->tag_at(cp_index).value()) {
2659 case JVM_CONSTANT_Methodref:
2660 case JVM_CONSTANT_InterfaceMethodref: {
2661 Symbol* name = cp->uncached_name_ref_at(cp_index);
2662 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2663 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2664 int methods_count = methods->length();
2665 for (int i = 0; i < methods_count; i++) {
2666 Method* method = methods->at(i);
2667 if (method->name() == name && method->signature() == signature) {
2668 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2669 }
2670 }
2671 return -1;
2672 }
2673 default:
2674 fatal("JVM_GetCPMethodModifiers: illegal constant");
2675 }
2676 ShouldNotReachHere();
2677 return 0;
2678 JVM_END
2679
2680
2681 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2682
2683 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2684 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2685 JVM_END
2686
2687
2688 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2689 JVMWrapper("JVM_IsSameClassPackage");
2690 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2691 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2692 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2693 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2694 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2695 JVM_END
2696
2697
2698 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2699
2700 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2701 JVMWrapper2("JVM_Open (%s)", fname);
2702
2703 //%note jvm_r6
2704 int result = os::open(fname, flags, mode);
2705 if (result >= 0) {
2706 return result;
2707 } else {
2708 switch(errno) {
2709 case EEXIST:
2710 return JVM_EEXIST;
2711 default:
2712 return -1;
2713 }
2714 }
2715 JVM_END
2716
2717
2718 JVM_LEAF(jint, JVM_Close(jint fd))
2719 JVMWrapper2("JVM_Close (0x%x)", fd);
2720 //%note jvm_r6
2721 return os::close(fd);
2722 JVM_END
2723
2724
2725 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2726 JVMWrapper2("JVM_Read (0x%x)", fd);
2727
2728 //%note jvm_r6
2729 return (jint)os::restartable_read(fd, buf, nbytes);
2730 JVM_END
2731
2732
2733 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2734 JVMWrapper2("JVM_Write (0x%x)", fd);
2735
2736 //%note jvm_r6
2737 return (jint)os::write(fd, buf, nbytes);
2738 JVM_END
2739
2740
2741 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2742 JVMWrapper2("JVM_Available (0x%x)", fd);
2743 //%note jvm_r6
2744 return os::available(fd, pbytes);
2745 JVM_END
2746
2747
2748 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2749 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2750 //%note jvm_r6
2751 return os::lseek(fd, offset, whence);
2752 JVM_END
2753
2754
2755 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2756 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2757 return os::ftruncate(fd, length);
2758 JVM_END
2759
2760
2761 JVM_LEAF(jint, JVM_Sync(jint fd))
2762 JVMWrapper2("JVM_Sync (0x%x)", fd);
2763 //%note jvm_r6
2764 return os::fsync(fd);
2765 JVM_END
2766
2767
2768 // Printing support //////////////////////////////////////////////////
2769 extern "C" {
2770
2771 ATTRIBUTE_PRINTF(3, 0)
2772 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2773 // see bug 4399518, 4417214
2774 if ((intptr_t)count <= 0) return -1;
2775 return vsnprintf(str, count, fmt, args);
2776 }
2777
2778 ATTRIBUTE_PRINTF(3, 0)
2779 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2780 va_list args;
2781 int len;
2782 va_start(args, fmt);
2783 len = jio_vsnprintf(str, count, fmt, args);
2784 va_end(args);
2785 return len;
2786 }
2787
2788 ATTRIBUTE_PRINTF(2,3)
2789 int jio_fprintf(FILE* f, const char *fmt, ...) {
2790 int len;
2791 va_list args;
2792 va_start(args, fmt);
2793 len = jio_vfprintf(f, fmt, args);
2794 va_end(args);
2795 return len;
2796 }
2797
2798 ATTRIBUTE_PRINTF(2, 0)
2799 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2800 if (Arguments::vfprintf_hook() != NULL) {
2801 return Arguments::vfprintf_hook()(f, fmt, args);
2802 } else {
2803 return vfprintf(f, fmt, args);
2804 }
2805 }
2806
2807 ATTRIBUTE_PRINTF(1, 2)
2808 JNIEXPORT int jio_printf(const char *fmt, ...) {
2809 int len;
2810 va_list args;
2811 va_start(args, fmt);
2812 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2813 va_end(args);
2814 return len;
2815 }
2816
2817
2818 // HotSpot specific jio method
2819 void jio_print(const char* s) {
2820 // Try to make this function as atomic as possible.
2821 if (Arguments::vfprintf_hook() != NULL) {
2822 jio_fprintf(defaultStream::output_stream(), "%s", s);
2823 } else {
2824 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2825 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2826 }
2827 }
2828
2829 } // Extern C
2830
2831 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2832
2833 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2834 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2835 // OSThread objects. The exception to this rule is when the target object is the thread
2836 // doing the operation, in which case we know that the thread won't exit until the
2837 // operation is done (all exits being voluntary). There are a few cases where it is
2838 // rather silly to do operations on yourself, like resuming yourself or asking whether
2839 // you are alive. While these can still happen, they are not subject to deadlocks if
2840 // the lock is held while the operation occurs (this is not the case for suspend, for
2841 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2842 // implementation is local to this file, we always lock Threads_lock for that one.
2843
2844 static void thread_entry(JavaThread* thread, TRAPS) {
2845 HandleMark hm(THREAD);
2846 Handle obj(THREAD, thread->threadObj());
2847 JavaValue result(T_VOID);
2848 JavaCalls::call_virtual(&result,
2849 obj,
2850 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2851 vmSymbols::run_method_name(),
2852 vmSymbols::void_method_signature(),
2853 THREAD);
2854 }
2855
2856
2857 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2858 JVMWrapper("JVM_StartThread");
2859 JavaThread *native_thread = NULL;
2860
2861 // We cannot hold the Threads_lock when we throw an exception,
2862 // due to rank ordering issues. Example: we might need to grab the
2863 // Heap_lock while we construct the exception.
2864 bool throw_illegal_thread_state = false;
2865
2866 // We must release the Threads_lock before we can post a jvmti event
2867 // in Thread::start.
2868 {
2869 // Ensure that the C++ Thread and OSThread structures aren't freed before
2870 // we operate.
2871 MutexLocker mu(Threads_lock);
2872
2873 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2874 // re-starting an already started thread, so we should usually find
2875 // that the JavaThread is null. However for a JNI attached thread
2876 // there is a small window between the Thread object being created
2877 // (with its JavaThread set) and the update to its threadStatus, so we
2878 // have to check for this
2879 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2880 throw_illegal_thread_state = true;
2881 } else {
2882 // We could also check the stillborn flag to see if this thread was already stopped, but
2883 // for historical reasons we let the thread detect that itself when it starts running
2884
2885 jlong size =
2886 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2887 // Allocate the C++ Thread structure and create the native thread. The
2888 // stack size retrieved from java is signed, but the constructor takes
2889 // size_t (an unsigned type), so avoid passing negative values which would
2890 // result in really large stacks.
2891 size_t sz = size > 0 ? (size_t) size : 0;
2892 native_thread = new JavaThread(&thread_entry, sz);
2893
2894 // At this point it may be possible that no osthread was created for the
2895 // JavaThread due to lack of memory. Check for this situation and throw
2896 // an exception if necessary. Eventually we may want to change this so
2897 // that we only grab the lock if the thread was created successfully -
2898 // then we can also do this check and throw the exception in the
2899 // JavaThread constructor.
2900 if (native_thread->osthread() != NULL) {
2901 // Note: the current thread is not being used within "prepare".
2902 native_thread->prepare(jthread);
2903 }
2904 }
2905 }
2906
2907 if (throw_illegal_thread_state) {
2908 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2909 }
2910
2911 assert(native_thread != NULL, "Starting null thread?");
2912
2913 if (native_thread->osthread() == NULL) {
2914 // No one should hold a reference to the 'native_thread'.
2915 delete native_thread;
2916 if (JvmtiExport::should_post_resource_exhausted()) {
2917 JvmtiExport::post_resource_exhausted(
2918 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2919 "unable to create new native thread");
2920 }
2921 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2922 "unable to create new native thread");
2923 }
2924
2925 Thread::start(native_thread);
2926
2927 JVM_END
2928
2929 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2930 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2931 // but is thought to be reliable and simple. In the case, where the receiver is the
2932 // same thread as the sender, no safepoint is needed.
2933 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2934 JVMWrapper("JVM_StopThread");
2935
2936 oop java_throwable = JNIHandles::resolve(throwable);
2937 if (java_throwable == NULL) {
2938 THROW(vmSymbols::java_lang_NullPointerException());
2939 }
2940 oop java_thread = JNIHandles::resolve_non_null(jthread);
2941 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2942 Events::log_exception(JavaThread::current(),
2943 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2944 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2945 // First check if thread is alive
2946 if (receiver != NULL) {
2947 // Check if exception is getting thrown at self (use oop equality, since the
2948 // target object might exit)
2949 if (java_thread == thread->threadObj()) {
2950 THROW_OOP(java_throwable);
2951 } else {
2952 // Enques a VM_Operation to stop all threads and then deliver the exception...
2953 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2954 }
2955 }
2956 else {
2957 // Either:
2958 // - target thread has not been started before being stopped, or
2959 // - target thread already terminated
2960 // We could read the threadStatus to determine which case it is
2961 // but that is overkill as it doesn't matter. We must set the
2962 // stillborn flag for the first case, and if the thread has already
2963 // exited setting this flag has no affect
2964 java_lang_Thread::set_stillborn(java_thread);
2965 }
2966 JVM_END
2967
2968
2969 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2970 JVMWrapper("JVM_IsThreadAlive");
2971
2972 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2973 return java_lang_Thread::is_alive(thread_oop);
2974 JVM_END
2975
2976
2977 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2978 JVMWrapper("JVM_SuspendThread");
2979 oop java_thread = JNIHandles::resolve_non_null(jthread);
2980 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2981
2982 if (receiver != NULL) {
2983 // thread has run and has not exited (still on threads list)
2984
2985 {
2986 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2987 if (receiver->is_external_suspend()) {
2988 // Don't allow nested external suspend requests. We can't return
2989 // an error from this interface so just ignore the problem.
2990 return;
2991 }
2992 if (receiver->is_exiting()) { // thread is in the process of exiting
2993 return;
2994 }
2995 receiver->set_external_suspend();
2996 }
2997
2998 // java_suspend() will catch threads in the process of exiting
2999 // and will ignore them.
3000 receiver->java_suspend();
3001
3002 // It would be nice to have the following assertion in all the
3003 // time, but it is possible for a racing resume request to have
3004 // resumed this thread right after we suspended it. Temporarily
3005 // enable this assertion if you are chasing a different kind of
3006 // bug.
3007 //
3008 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3009 // receiver->is_being_ext_suspended(), "thread is not suspended");
3010 }
3011 JVM_END
3012
3013
3014 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3015 JVMWrapper("JVM_ResumeThread");
3016 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3017 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3018 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3019 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3020 // looks at it.
3021 MutexLocker ml(Threads_lock);
3022 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3023 if (thr != NULL) {
3024 // the thread has run and is not in the process of exiting
3025 thr->java_resume();
3026 }
3027 JVM_END
3028
3029
3030 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3031 JVMWrapper("JVM_SetThreadPriority");
3032 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3033 MutexLocker ml(Threads_lock);
3034 oop java_thread = JNIHandles::resolve_non_null(jthread);
3035 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3036 JavaThread* thr = java_lang_Thread::thread(java_thread);
3037 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3038 Thread::set_priority(thr, (ThreadPriority)prio);
3039 }
3040 JVM_END
3041
3042
3043 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3044 JVMWrapper("JVM_Yield");
3045 if (os::dont_yield()) return;
3046 #ifndef USDT2
3047 HS_DTRACE_PROBE0(hotspot, thread__yield);
3048 #else /* USDT2 */
3049 HOTSPOT_THREAD_YIELD();
3050 #endif /* USDT2 */
3051 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3052 // Critical for similar threading behaviour
3053 if (ConvertYieldToSleep) {
3054 os::sleep(thread, MinSleepInterval, false);
3055 } else {
3056 os::yield();
3057 }
3058 JVM_END
3059
3060
3061 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3062 JVMWrapper("JVM_Sleep");
3063
3064 if (millis < 0) {
3065 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3066 }
3067
3068 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3069 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3070 }
3071
3072 // Save current thread state and restore it at the end of this block.
3073 // And set new thread state to SLEEPING.
3074 JavaThreadSleepState jtss(thread);
3075
3076 #ifndef USDT2
3077 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3078 #else /* USDT2 */
3079 HOTSPOT_THREAD_SLEEP_BEGIN(
3080 millis);
3081 #endif /* USDT2 */
3082
3083 EventThreadSleep event;
3084
3085 if (millis == 0) {
3086 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3087 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3088 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3089 // for SOLARIS
3090 if (ConvertSleepToYield) {
3091 os::yield();
3092 } else {
3093 ThreadState old_state = thread->osthread()->get_state();
3094 thread->osthread()->set_state(SLEEPING);
3095 os::sleep(thread, MinSleepInterval, false);
3096 thread->osthread()->set_state(old_state);
3097 }
3098 } else {
3099 ThreadState old_state = thread->osthread()->get_state();
3100 thread->osthread()->set_state(SLEEPING);
3101 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3102 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3103 // us while we were sleeping. We do not overwrite those.
3104 if (!HAS_PENDING_EXCEPTION) {
3105 if (event.should_commit()) {
3106 event.set_time(millis);
3107 event.commit();
3108 }
3109 #ifndef USDT2
3110 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3111 #else /* USDT2 */
3112 HOTSPOT_THREAD_SLEEP_END(
3113 1);
3114 #endif /* USDT2 */
3115 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3116 // to properly restore the thread state. That's likely wrong.
3117 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3118 }
3119 }
3120 thread->osthread()->set_state(old_state);
3121 }
3122 if (event.should_commit()) {
3123 event.set_time(millis);
3124 event.commit();
3125 }
3126 #ifndef USDT2
3127 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3128 #else /* USDT2 */
3129 HOTSPOT_THREAD_SLEEP_END(
3130 0);
3131 #endif /* USDT2 */
3132 JVM_END
3133
3134 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3135 JVMWrapper("JVM_CurrentThread");
3136 oop jthread = thread->threadObj();
3137 assert (thread != NULL, "no current thread!");
3138 return JNIHandles::make_local(env, jthread);
3139 JVM_END
3140
3141
3142 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3143 JVMWrapper("JVM_CountStackFrames");
3144
3145 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3146 oop java_thread = JNIHandles::resolve_non_null(jthread);
3147 bool throw_illegal_thread_state = false;
3148 int count = 0;
3149
3150 {
3151 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3152 // We need to re-resolve the java_thread, since a GC might have happened during the
3153 // acquire of the lock
3154 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3155
3156 if (thr == NULL) {
3157 // do nothing
3158 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3159 // Check whether this java thread has been suspended already. If not, throws
3160 // IllegalThreadStateException. We defer to throw that exception until
3161 // Threads_lock is released since loading exception class has to leave VM.
3162 // The correct way to test a thread is actually suspended is
3163 // wait_for_ext_suspend_completion(), but we can't call that while holding
3164 // the Threads_lock. The above tests are sufficient for our purposes
3165 // provided the walkability of the stack is stable - which it isn't
3166 // 100% but close enough for most practical purposes.
3167 throw_illegal_thread_state = true;
3168 } else {
3169 // Count all java activation, i.e., number of vframes
3170 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3171 // Native frames are not counted
3172 if (!vfst.method()->is_native()) count++;
3173 }
3174 }
3175 }
3176
3177 if (throw_illegal_thread_state) {
3178 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3179 "this thread is not suspended");
3180 }
3181 return count;
3182 JVM_END
3183
3184 // Consider: A better way to implement JVM_Interrupt() is to acquire
3185 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3186 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3187 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3188 // outside the critical section. Threads_lock is hot so we want to minimize
3189 // the hold-time. A cleaner interface would be to decompose interrupt into
3190 // two steps. The 1st phase, performed under Threads_lock, would return
3191 // a closure that'd be invoked after Threads_lock was dropped.
3192 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3193 // admit spurious wakeups.
3194
3195 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3196 JVMWrapper("JVM_Interrupt");
3197
3198 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3199 oop java_thread = JNIHandles::resolve_non_null(jthread);
3200 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3201 // We need to re-resolve the java_thread, since a GC might have happened during the
3202 // acquire of the lock
3203 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3204 if (thr != NULL) {
3205 Thread::interrupt(thr);
3206 }
3207 JVM_END
3208
3209
3210 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3211 JVMWrapper("JVM_IsInterrupted");
3212
3213 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3214 oop java_thread = JNIHandles::resolve_non_null(jthread);
3215 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3216 // We need to re-resolve the java_thread, since a GC might have happened during the
3217 // acquire of the lock
3218 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3219 if (thr == NULL) {
3220 return JNI_FALSE;
3221 } else {
3222 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3223 }
3224 JVM_END
3225
3226
3227 // Return true iff the current thread has locked the object passed in
3228
3229 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3230 JVMWrapper("JVM_HoldsLock");
3231 assert(THREAD->is_Java_thread(), "sanity check");
3232 if (obj == NULL) {
3233 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3234 }
3235 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3236 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3237 JVM_END
3238
3239
3240 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3241 JVMWrapper("JVM_DumpAllStacks");
3242 VM_PrintThreads op;
3243 VMThread::execute(&op);
3244 if (JvmtiExport::should_post_data_dump()) {
3245 JvmtiExport::post_data_dump();
3246 }
3247 JVM_END
3248
3249 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3250 JVMWrapper("JVM_SetNativeThreadName");
3251 ResourceMark rm(THREAD);
3252 oop java_thread = JNIHandles::resolve_non_null(jthread);
3253 JavaThread* thr = java_lang_Thread::thread(java_thread);
3254 // Thread naming only supported for the current thread, doesn't work for
3255 // target threads.
3256 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3257 // we don't set the name of an attached thread to avoid stepping
3258 // on other programs
3259 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3260 os::set_native_thread_name(thread_name);
3261 }
3262 JVM_END
3263
3264 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3265
3266 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3267 assert(jthread->is_Java_thread(), "must be a Java thread");
3268 if (jthread->privileged_stack_top() == NULL) return false;
3269 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3270 oop loader = jthread->privileged_stack_top()->class_loader();
3271 if (loader == NULL) return true;
3272 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3273 if (trusted) return true;
3274 }
3275 return false;
3276 }
3277
3278 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3279 JVMWrapper("JVM_CurrentLoadedClass");
3280 ResourceMark rm(THREAD);
3281
3282 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3283 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3284 bool trusted = is_trusted_frame(thread, &vfst);
3285 if (trusted) return NULL;
3286
3287 Method* m = vfst.method();
3288 if (!m->is_native()) {
3289 InstanceKlass* holder = m->method_holder();
3290 oop loader = holder->class_loader();
3291 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3292 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3293 }
3294 }
3295 }
3296 return NULL;
3297 JVM_END
3298
3299
3300 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3301 JVMWrapper("JVM_CurrentClassLoader");
3302 ResourceMark rm(THREAD);
3303
3304 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3305
3306 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3307 bool trusted = is_trusted_frame(thread, &vfst);
3308 if (trusted) return NULL;
3309
3310 Method* m = vfst.method();
3311 if (!m->is_native()) {
3312 InstanceKlass* holder = m->method_holder();
3313 assert(holder->is_klass(), "just checking");
3314 oop loader = holder->class_loader();
3315 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3316 return JNIHandles::make_local(env, loader);
3317 }
3318 }
3319 }
3320 return NULL;
3321 JVM_END
3322
3323
3324 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3325 JVMWrapper("JVM_GetClassContext");
3326 ResourceMark rm(THREAD);
3327 JvmtiVMObjectAllocEventCollector oam;
3328 vframeStream vfst(thread);
3329
3330 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3331 // This must only be called from SecurityManager.getClassContext
3332 Method* m = vfst.method();
3333 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3334 m->name() == vmSymbols::getClassContext_name() &&
3335 m->signature() == vmSymbols::void_class_array_signature())) {
3336 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3337 }
3338 }
3339
3340 // Collect method holders
3341 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3342 for (; !vfst.at_end(); vfst.security_next()) {
3343 Method* m = vfst.method();
3344 // Native frames are not returned
3345 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3346 Klass* holder = m->method_holder();
3347 assert(holder->is_klass(), "just checking");
3348 klass_array->append(holder);
3349 }
3350 }
3351
3352 // Create result array of type [Ljava/lang/Class;
3353 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3354 // Fill in mirrors corresponding to method holders
3355 for (int i = 0; i < klass_array->length(); i++) {
3356 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3357 }
3358
3359 return (jobjectArray) JNIHandles::make_local(env, result);
3360 JVM_END
3361
3362
3363 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3364 JVMWrapper("JVM_ClassDepth");
3365 ResourceMark rm(THREAD);
3366 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3367 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3368
3369 const char* str = java_lang_String::as_utf8_string(class_name_str());
3370 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3371 if (class_name_sym == NULL) {
3372 return -1;
3373 }
3374
3375 int depth = 0;
3376
3377 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3378 if (!vfst.method()->is_native()) {
3379 InstanceKlass* holder = vfst.method()->method_holder();
3380 assert(holder->is_klass(), "just checking");
3381 if (holder->name() == class_name_sym) {
3382 return depth;
3383 }
3384 depth++;
3385 }
3386 }
3387 return -1;
3388 JVM_END
3389
3390
3391 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3392 JVMWrapper("JVM_ClassLoaderDepth");
3393 ResourceMark rm(THREAD);
3394 int depth = 0;
3395 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3396 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3397 bool trusted = is_trusted_frame(thread, &vfst);
3398 if (trusted) return -1;
3399
3400 Method* m = vfst.method();
3401 if (!m->is_native()) {
3402 InstanceKlass* holder = m->method_holder();
3403 assert(holder->is_klass(), "just checking");
3404 oop loader = holder->class_loader();
3405 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3406 return depth;
3407 }
3408 depth++;
3409 }
3410 }
3411 return -1;
3412 JVM_END
3413
3414
3415 // java.lang.Package ////////////////////////////////////////////////////////////////
3416
3417
3418 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3419 JVMWrapper("JVM_GetSystemPackage");
3420 ResourceMark rm(THREAD);
3421 JvmtiVMObjectAllocEventCollector oam;
3422 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3423 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3424 return (jstring) JNIHandles::make_local(result);
3425 JVM_END
3426
3427
3428 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3429 JVMWrapper("JVM_GetSystemPackages");
3430 JvmtiVMObjectAllocEventCollector oam;
3431 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3432 return (jobjectArray) JNIHandles::make_local(result);
3433 JVM_END
3434
3435
3436 // ObjectInputStream ///////////////////////////////////////////////////////////////
3437
3438 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3439 if (current_class == NULL) {
3440 return true;
3441 }
3442 if ((current_class == field_class) || access.is_public()) {
3443 return true;
3444 }
3445
3446 if (access.is_protected()) {
3447 // See if current_class is a subclass of field_class
3448 if (current_class->is_subclass_of(field_class)) {
3449 return true;
3450 }
3451 }
3452
3453 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3454 }
3455
3456
3457 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3458 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3459 JVMWrapper("JVM_AllocateNewObject");
3460 JvmtiVMObjectAllocEventCollector oam;
3461 // Receiver is not used
3462 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3463 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3464
3465 // Cannot instantiate primitive types
3466 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3467 ResourceMark rm(THREAD);
3468 THROW_0(vmSymbols::java_lang_InvalidClassException());
3469 }
3470
3471 // Arrays not allowed here, must use JVM_AllocateNewArray
3472 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3473 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3474 ResourceMark rm(THREAD);
3475 THROW_0(vmSymbols::java_lang_InvalidClassException());
3476 }
3477
3478 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3479 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3480
3481 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3482
3483 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3484 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3485
3486 // Make sure klass is initialized, since we are about to instantiate one of them.
3487 curr_klass->initialize(CHECK_NULL);
3488
3489 methodHandle m (THREAD,
3490 init_klass->find_method(vmSymbols::object_initializer_name(),
3491 vmSymbols::void_method_signature()));
3492 if (m.is_null()) {
3493 ResourceMark rm(THREAD);
3494 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3495 Method::name_and_sig_as_C_string(init_klass(),
3496 vmSymbols::object_initializer_name(),
3497 vmSymbols::void_method_signature()));
3498 }
3499
3500 if (curr_klass == init_klass && !m->is_public()) {
3501 // Calling the constructor for class 'curr_klass'.
3502 // Only allow calls to a public no-arg constructor.
3503 // This path corresponds to creating an Externalizable object.
3504 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3505 }
3506
3507 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3508 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3509 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3510 }
3511
3512 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3513 // Call constructor m. This might call a constructor higher up in the hierachy
3514 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3515
3516 return JNIHandles::make_local(obj());
3517 JVM_END
3518
3519
3520 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3521 JVMWrapper("JVM_AllocateNewArray");
3522 JvmtiVMObjectAllocEventCollector oam;
3523 oop mirror = JNIHandles::resolve_non_null(currClass);
3524
3525 if (java_lang_Class::is_primitive(mirror)) {
3526 THROW_0(vmSymbols::java_lang_InvalidClassException());
3527 }
3528 Klass* k = java_lang_Class::as_Klass(mirror);
3529 oop result;
3530
3531 if (k->oop_is_typeArray()) {
3532 // typeArray
3533 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3534 } else if (k->oop_is_objArray()) {
3535 // objArray
3536 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3537 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3538 result = oak->allocate(length, CHECK_NULL);
3539 } else {
3540 THROW_0(vmSymbols::java_lang_InvalidClassException());
3541 }
3542 return JNIHandles::make_local(env, result);
3543 JVM_END
3544
3545
3546 // Return the first non-null class loader up the execution stack, or null
3547 // if only code from the null class loader is on the stack.
3548
3549 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3550 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3551 // UseNewReflection
3552 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3553 oop loader = vfst.method()->method_holder()->class_loader();
3554 if (loader != NULL) {
3555 return JNIHandles::make_local(env, loader);
3556 }
3557 }
3558 return NULL;
3559 JVM_END
3560
3561
3562 // Load a class relative to the most recent class on the stack with a non-null
3563 // classloader.
3564 // This function has been deprecated and should not be considered part of the
3565 // specified JVM interface.
3566
3567 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3568 jclass currClass, jstring currClassName))
3569 JVMWrapper("JVM_LoadClass0");
3570 // Receiver is not used
3571 ResourceMark rm(THREAD);
3572
3573 // Class name argument is not guaranteed to be in internal format
3574 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3575 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3576
3577 const char* str = java_lang_String::as_utf8_string(string());
3578
3579 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3580 // It's impossible to create this class; the name cannot fit
3581 // into the constant pool.
3582 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3583 }
3584
3585 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3586 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3587 // Find the most recent class on the stack with a non-null classloader
3588 oop loader = NULL;
3589 oop protection_domain = NULL;
3590 if (curr_klass.is_null()) {
3591 for (vframeStream vfst(thread);
3592 !vfst.at_end() && loader == NULL;
3593 vfst.next()) {
3594 if (!vfst.method()->is_native()) {
3595 InstanceKlass* holder = vfst.method()->method_holder();
3596 loader = holder->class_loader();
3597 protection_domain = holder->protection_domain();
3598 }
3599 }
3600 } else {
3601 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3602 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3603 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3604 }
3605 Handle h_loader(THREAD, loader);
3606 Handle h_prot (THREAD, protection_domain);
3607 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3608 false, thread);
3609 if (TraceClassResolution && result != NULL) {
3610 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3611 }
3612 return result;
3613 JVM_END
3614
3615
3616 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3617
3618
3619 // resolve array handle and check arguments
3620 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3621 if (arr == NULL) {
3622 THROW_0(vmSymbols::java_lang_NullPointerException());
3623 }
3624 oop a = JNIHandles::resolve_non_null(arr);
3625 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3626 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3627 }
3628 return arrayOop(a);
3629 }
3630
3631
3632 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3633 JVMWrapper("JVM_GetArrayLength");
3634 arrayOop a = check_array(env, arr, false, CHECK_0);
3635 return a->length();
3636 JVM_END
3637
3638
3639 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3640 JVMWrapper("JVM_Array_Get");
3641 JvmtiVMObjectAllocEventCollector oam;
3642 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3643 jvalue value;
3644 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3645 oop box = Reflection::box(&value, type, CHECK_NULL);
3646 return JNIHandles::make_local(env, box);
3647 JVM_END
3648
3649
3650 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3651 JVMWrapper("JVM_GetPrimitiveArrayElement");
3652 jvalue value;
3653 value.i = 0; // to initialize value before getting used in CHECK
3654 arrayOop a = check_array(env, arr, true, CHECK_(value));
3655 assert(a->is_typeArray(), "just checking");
3656 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3657 BasicType wide_type = (BasicType) wCode;
3658 if (type != wide_type) {
3659 Reflection::widen(&value, type, wide_type, CHECK_(value));
3660 }
3661 return value;
3662 JVM_END
3663
3664
3665 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3666 JVMWrapper("JVM_SetArrayElement");
3667 arrayOop a = check_array(env, arr, false, CHECK);
3668 oop box = JNIHandles::resolve(val);
3669 jvalue value;
3670 value.i = 0; // to initialize value before getting used in CHECK
3671 BasicType value_type;
3672 if (a->is_objArray()) {
3673 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3674 value_type = Reflection::unbox_for_regular_object(box, &value);
3675 } else {
3676 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3677 }
3678 Reflection::array_set(&value, a, index, value_type, CHECK);
3679 JVM_END
3680
3681
3682 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3683 JVMWrapper("JVM_SetPrimitiveArrayElement");
3684 arrayOop a = check_array(env, arr, true, CHECK);
3685 assert(a->is_typeArray(), "just checking");
3686 BasicType value_type = (BasicType) vCode;
3687 Reflection::array_set(&v, a, index, value_type, CHECK);
3688 JVM_END
3689
3690
3691 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3692 JVMWrapper("JVM_NewArray");
3693 JvmtiVMObjectAllocEventCollector oam;
3694 oop element_mirror = JNIHandles::resolve(eltClass);
3695 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3696 return JNIHandles::make_local(env, result);
3697 JVM_END
3698
3699
3700 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3701 JVMWrapper("JVM_NewMultiArray");
3702 JvmtiVMObjectAllocEventCollector oam;
3703 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3704 oop element_mirror = JNIHandles::resolve(eltClass);
3705 assert(dim_array->is_typeArray(), "just checking");
3706 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3707 return JNIHandles::make_local(env, result);
3708 JVM_END
3709
3710
3711 // Networking library support ////////////////////////////////////////////////////////////////////
3712
3713 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3714 JVMWrapper("JVM_InitializeSocketLibrary");
3715 return 0;
3716 JVM_END
3717
3718
3719 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3720 JVMWrapper("JVM_Socket");
3721 return os::socket(domain, type, protocol);
3722 JVM_END
3723
3724
3725 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3726 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3727 //%note jvm_r6
3728 return os::socket_close(fd);
3729 JVM_END
3730
3731
3732 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3733 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3734 //%note jvm_r6
3735 return os::socket_shutdown(fd, howto);
3736 JVM_END
3737
3738
3739 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3740 JVMWrapper2("JVM_Recv (0x%x)", fd);
3741 //%note jvm_r6
3742 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3743 JVM_END
3744
3745
3746 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3747 JVMWrapper2("JVM_Send (0x%x)", fd);
3748 //%note jvm_r6
3749 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3750 JVM_END
3751
3752
3753 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3754 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3755 //%note jvm_r6
3756 return os::timeout(fd, timeout);
3757 JVM_END
3758
3759
3760 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3761 JVMWrapper2("JVM_Listen (0x%x)", fd);
3762 //%note jvm_r6
3763 return os::listen(fd, count);
3764 JVM_END
3765
3766
3767 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3768 JVMWrapper2("JVM_Connect (0x%x)", fd);
3769 //%note jvm_r6
3770 return os::connect(fd, him, (socklen_t)len);
3771 JVM_END
3772
3773
3774 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3775 JVMWrapper2("JVM_Bind (0x%x)", fd);
3776 //%note jvm_r6
3777 return os::bind(fd, him, (socklen_t)len);
3778 JVM_END
3779
3780
3781 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3782 JVMWrapper2("JVM_Accept (0x%x)", fd);
3783 //%note jvm_r6
3784 socklen_t socklen = (socklen_t)(*len);
3785 jint result = os::accept(fd, him, &socklen);
3786 *len = (jint)socklen;
3787 return result;
3788 JVM_END
3789
3790
3791 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3792 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3793 //%note jvm_r6
3794 socklen_t socklen = (socklen_t)(*fromlen);
3795 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3796 *fromlen = (int)socklen;
3797 return result;
3798 JVM_END
3799
3800
3801 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3802 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3803 //%note jvm_r6
3804 socklen_t socklen = (socklen_t)(*len);
3805 jint result = os::get_sock_name(fd, him, &socklen);
3806 *len = (int)socklen;
3807 return result;
3808 JVM_END
3809
3810
3811 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3812 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3813 //%note jvm_r6
3814 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3815 JVM_END
3816
3817
3818 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3819 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3820 //%note jvm_r6
3821 return os::socket_available(fd, pbytes);
3822 JVM_END
3823
3824
3825 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3826 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3827 //%note jvm_r6
3828 socklen_t socklen = (socklen_t)(*optlen);
3829 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3830 *optlen = (int)socklen;
3831 return result;
3832 JVM_END
3833
3834
3835 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3836 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3837 //%note jvm_r6
3838 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3839 JVM_END
3840
3841
3842 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3843 JVMWrapper("JVM_GetHostName");
3844 return os::get_host_name(name, namelen);
3845 JVM_END
3846
3847
3848 // Library support ///////////////////////////////////////////////////////////////////////////
3849
3850 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3851 //%note jvm_ct
3852 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3853 char ebuf[1024];
3854 void *load_result;
3855 {
3856 ThreadToNativeFromVM ttnfvm(thread);
3857 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3858 }
3859 if (load_result == NULL) {
3860 char msg[1024];
3861 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3862 // Since 'ebuf' may contain a string encoded using
3863 // platform encoding scheme, we need to pass
3864 // Exceptions::unsafe_to_utf8 to the new_exception method
3865 // as the last argument. See bug 6367357.
3866 Handle h_exception =
3867 Exceptions::new_exception(thread,
3868 vmSymbols::java_lang_UnsatisfiedLinkError(),
3869 msg, Exceptions::unsafe_to_utf8);
3870
3871 THROW_HANDLE_0(h_exception);
3872 }
3873 return load_result;
3874 JVM_END
3875
3876
3877 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3878 JVMWrapper("JVM_UnloadLibrary");
3879 os::dll_unload(handle);
3880 JVM_END
3881
3882
3883 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3884 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3885 return os::dll_lookup(handle, name);
3886 JVM_END
3887
3888
3889 // Floating point support ////////////////////////////////////////////////////////////////////
3890
3891 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3892 JVMWrapper("JVM_IsNaN");
3893 return g_isnan(a);
3894 JVM_END
3895
3896
3897 // JNI version ///////////////////////////////////////////////////////////////////////////////
3898
3899 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3900 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3901 return Threads::is_supported_jni_version_including_1_1(version);
3902 JVM_END
3903
3904
3905 // String support ///////////////////////////////////////////////////////////////////////////
3906
3907 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3908 JVMWrapper("JVM_InternString");
3909 JvmtiVMObjectAllocEventCollector oam;
3910 if (str == NULL) return NULL;
3911 oop string = JNIHandles::resolve_non_null(str);
3912 oop result = StringTable::intern(string, CHECK_NULL);
3913 return (jstring) JNIHandles::make_local(env, result);
3914 JVM_END
3915
3916
3917 // Raw monitor support //////////////////////////////////////////////////////////////////////
3918
3919 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3920 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3921 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3922 // that only works with java threads.
3923
3924
3925 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3926 VM_Exit::block_if_vm_exited();
3927 JVMWrapper("JVM_RawMonitorCreate");
3928 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3929 }
3930
3931
3932 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3933 VM_Exit::block_if_vm_exited();
3934 JVMWrapper("JVM_RawMonitorDestroy");
3935 delete ((Mutex*) mon);
3936 }
3937
3938
3939 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3940 VM_Exit::block_if_vm_exited();
3941 JVMWrapper("JVM_RawMonitorEnter");
3942 ((Mutex*) mon)->jvm_raw_lock();
3943 return 0;
3944 }
3945
3946
3947 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3948 VM_Exit::block_if_vm_exited();
3949 JVMWrapper("JVM_RawMonitorExit");
3950 ((Mutex*) mon)->jvm_raw_unlock();
3951 }
3952
3953
3954 // Support for Serialization
3955
3956 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3957 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3958 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3959 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3960
3961 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3962 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3963 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3964 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3965
3966
3967 void initialize_converter_functions() {
3968 if (JDK_Version::is_gte_jdk14x_version()) {
3969 // These functions only exist for compatibility with 1.3.1 and earlier
3970 return;
3971 }
3972
3973 // called from universe_post_init()
3974 assert(
3975 int_bits_to_float_fn == NULL &&
3976 long_bits_to_double_fn == NULL &&
3977 float_to_int_bits_fn == NULL &&
3978 double_to_long_bits_fn == NULL ,
3979 "initialization done twice"
3980 );
3981 // initialize
3982 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3983 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3984 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3985 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3986 // verify
3987 assert(
3988 int_bits_to_float_fn != NULL &&
3989 long_bits_to_double_fn != NULL &&
3990 float_to_int_bits_fn != NULL &&
3991 double_to_long_bits_fn != NULL ,
3992 "initialization failed"
3993 );
3994 }
3995
3996
3997
3998 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3999
4000 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4001 // Security Note:
4002 // The Java level wrapper will perform the necessary security check allowing
4003 // us to pass the NULL as the initiating class loader.
4004 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4005
4006 KlassHandle klass_handle(THREAD, klass);
4007 // Check if we should initialize the class
4008 if (init && klass_handle->oop_is_instance()) {
4009 klass_handle->initialize(CHECK_NULL);
4010 }
4011 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4012 }
4013
4014
4015 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4016
4017 #ifndef PRODUCT
4018
4019 extern "C" {
4020 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4021 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4022 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4023 }
4024
4025 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4026 JVMWrapper("JVM_AccessBoolVMFlag");
4027 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4028 JVM_END
4029
4030 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4031 JVMWrapper("JVM_AccessVMIntFlag");
4032 intx v;
4033 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4034 *value = (jint)v;
4035 return result;
4036 JVM_END
4037
4038
4039 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4040 JVMWrapper("JVM_VMBreakPoint");
4041 oop the_obj = JNIHandles::resolve(obj);
4042 BREAKPOINT;
4043 JVM_END
4044
4045
4046 #endif
4047
4048
4049 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4050
4051 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4052 JVMWrapper("JVM_InvokeMethod");
4053 Handle method_handle;
4054 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4055 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4056 Handle receiver(THREAD, JNIHandles::resolve(obj));
4057 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4058 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4059 jobject res = JNIHandles::make_local(env, result);
4060 if (JvmtiExport::should_post_vm_object_alloc()) {
4061 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4062 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4063 if (java_lang_Class::is_primitive(ret_type)) {
4064 // Only for primitive type vm allocates memory for java object.
4065 // See box() method.
4066 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4067 }
4068 }
4069 return res;
4070 } else {
4071 THROW_0(vmSymbols::java_lang_StackOverflowError());
4072 }
4073 JVM_END
4074
4075
4076 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4077 JVMWrapper("JVM_NewInstanceFromConstructor");
4078 oop constructor_mirror = JNIHandles::resolve(c);
4079 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4080 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4081 jobject res = JNIHandles::make_local(env, result);
4082 if (JvmtiExport::should_post_vm_object_alloc()) {
4083 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4084 }
4085 return res;
4086 JVM_END
4087
4088 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4089
4090 JVM_LEAF(jboolean, JVM_SupportsCX8())
4091 JVMWrapper("JVM_SupportsCX8");
4092 return VM_Version::supports_cx8();
4093 JVM_END
4094
4095
4096 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4097 JVMWrapper("JVM_CX8Field");
4098 jlong res;
4099 oop o = JNIHandles::resolve(obj);
4100 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4101 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4102
4103 assert(VM_Version::supports_cx8(), "cx8 not supported");
4104 res = Atomic::cmpxchg(newVal, addr, oldVal);
4105
4106 return res == oldVal;
4107 JVM_END
4108
4109 // DTrace ///////////////////////////////////////////////////////////////////
4110
4111 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4112 JVMWrapper("JVM_DTraceGetVersion");
4113 return (jint)JVM_TRACING_DTRACE_VERSION;
4114 JVM_END
4115
4116 JVM_ENTRY(jlong,JVM_DTraceActivate(
4117 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4118 JVM_DTraceProvider* providers))
4119 JVMWrapper("JVM_DTraceActivate");
4120 return DTraceJSDT::activate(
4121 version, module_name, providers_count, providers, CHECK_0);
4122 JVM_END
4123
4124 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4125 JVMWrapper("JVM_DTraceIsProbeEnabled");
4126 return DTraceJSDT::is_probe_enabled(method);
4127 JVM_END
4128
4129 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4130 JVMWrapper("JVM_DTraceDispose");
4131 DTraceJSDT::dispose(handle);
4132 JVM_END
4133
4134 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4135 JVMWrapper("JVM_DTraceIsSupported");
4136 return DTraceJSDT::is_supported();
4137 JVM_END
4138
4139 // Returns an array of all live Thread objects (VM internal JavaThreads,
4140 // jvmti agent threads, and JNI attaching threads are skipped)
4141 // See CR 6404306 regarding JNI attaching threads
4142 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4143 ResourceMark rm(THREAD);
4144 ThreadsListEnumerator tle(THREAD, false, false);
4145 JvmtiVMObjectAllocEventCollector oam;
4146
4147 int num_threads = tle.num_threads();
4148 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4149 objArrayHandle threads_ah(THREAD, r);
4150
4151 for (int i = 0; i < num_threads; i++) {
4152 Handle h = tle.get_threadObj(i);
4153 threads_ah->obj_at_put(i, h());
4154 }
4155
4156 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4157 JVM_END
4158
4159
4160 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4161 // Return StackTraceElement[][], each element is the stack trace of a thread in
4162 // the corresponding entry in the given threads array
4163 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4164 JVMWrapper("JVM_DumpThreads");
4165 JvmtiVMObjectAllocEventCollector oam;
4166
4167 // Check if threads is null
4168 if (threads == NULL) {
4169 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4170 }
4171
4172 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4173 objArrayHandle ah(THREAD, a);
4174 int num_threads = ah->length();
4175 // check if threads is non-empty array
4176 if (num_threads == 0) {
4177 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4178 }
4179
4180 // check if threads is not an array of objects of Thread class
4181 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4182 if (k != SystemDictionary::Thread_klass()) {
4183 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4184 }
4185
4186 ResourceMark rm(THREAD);
4187
4188 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4189 for (int i = 0; i < num_threads; i++) {
4190 oop thread_obj = ah->obj_at(i);
4191 instanceHandle h(THREAD, (instanceOop) thread_obj);
4192 thread_handle_array->append(h);
4193 }
4194
4195 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4196 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4197
4198 JVM_END
4199
4200 // JVM monitoring and management support
4201 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4202 return Management::get_jmm_interface(version);
4203 JVM_END
4204
4205 // com.sun.tools.attach.VirtualMachine agent properties support
4206 //
4207 // Initialize the agent properties with the properties maintained in the VM
4208 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4209 JVMWrapper("JVM_InitAgentProperties");
4210 ResourceMark rm;
4211
4212 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4213
4214 PUTPROP(props, "sun.java.command", Arguments::java_command());
4215 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4216 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4217 return properties;
4218 JVM_END
4219
4220 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4221 {
4222 JVMWrapper("JVM_GetEnclosingMethodInfo");
4223 JvmtiVMObjectAllocEventCollector oam;
4224
4225 if (ofClass == NULL) {
4226 return NULL;
4227 }
4228 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4229 // Special handling for primitive objects
4230 if (java_lang_Class::is_primitive(mirror())) {
4231 return NULL;
4232 }
4233 Klass* k = java_lang_Class::as_Klass(mirror());
4234 if (!k->oop_is_instance()) {
4235 return NULL;
4236 }
4237 instanceKlassHandle ik_h(THREAD, k);
4238 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4239 if (encl_method_class_idx == 0) {
4240 return NULL;
4241 }
4242 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4243 objArrayHandle dest(THREAD, dest_o);
4244 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4245 dest->obj_at_put(0, enc_k->java_mirror());
4246 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4247 if (encl_method_method_idx != 0) {
4248 Symbol* sym = ik_h->constants()->symbol_at(
4249 extract_low_short_from_int(
4250 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4251 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4252 dest->obj_at_put(1, str());
4253 sym = ik_h->constants()->symbol_at(
4254 extract_high_short_from_int(
4255 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4256 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4257 dest->obj_at_put(2, str());
4258 }
4259 return (jobjectArray) JNIHandles::make_local(dest());
4260 }
4261 JVM_END
4262
4263 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4264 jint javaThreadState))
4265 {
4266 // If new thread states are added in future JDK and VM versions,
4267 // this should check if the JDK version is compatible with thread
4268 // states supported by the VM. Return NULL if not compatible.
4269 //
4270 // This function must map the VM java_lang_Thread::ThreadStatus
4271 // to the Java thread state that the JDK supports.
4272 //
4273
4274 typeArrayHandle values_h;
4275 switch (javaThreadState) {
4276 case JAVA_THREAD_STATE_NEW : {
4277 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4278 values_h = typeArrayHandle(THREAD, r);
4279 values_h->int_at_put(0, java_lang_Thread::NEW);
4280 break;
4281 }
4282 case JAVA_THREAD_STATE_RUNNABLE : {
4283 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4284 values_h = typeArrayHandle(THREAD, r);
4285 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4286 break;
4287 }
4288 case JAVA_THREAD_STATE_BLOCKED : {
4289 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4290 values_h = typeArrayHandle(THREAD, r);
4291 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4292 break;
4293 }
4294 case JAVA_THREAD_STATE_WAITING : {
4295 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4296 values_h = typeArrayHandle(THREAD, r);
4297 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4298 values_h->int_at_put(1, java_lang_Thread::PARKED);
4299 break;
4300 }
4301 case JAVA_THREAD_STATE_TIMED_WAITING : {
4302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4303 values_h = typeArrayHandle(THREAD, r);
4304 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4305 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4306 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4307 break;
4308 }
4309 case JAVA_THREAD_STATE_TERMINATED : {
4310 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4311 values_h = typeArrayHandle(THREAD, r);
4312 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4313 break;
4314 }
4315 default:
4316 // Unknown state - probably incompatible JDK version
4317 return NULL;
4318 }
4319
4320 return (jintArray) JNIHandles::make_local(env, values_h());
4321 }
4322 JVM_END
4323
4324
4325 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4326 jint javaThreadState,
4327 jintArray values))
4328 {
4329 // If new thread states are added in future JDK and VM versions,
4330 // this should check if the JDK version is compatible with thread
4331 // states supported by the VM. Return NULL if not compatible.
4332 //
4333 // This function must map the VM java_lang_Thread::ThreadStatus
4334 // to the Java thread state that the JDK supports.
4335 //
4336
4337 ResourceMark rm;
4338
4339 // Check if threads is null
4340 if (values == NULL) {
4341 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4342 }
4343
4344 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4345 typeArrayHandle values_h(THREAD, v);
4346
4347 objArrayHandle names_h;
4348 switch (javaThreadState) {
4349 case JAVA_THREAD_STATE_NEW : {
4350 assert(values_h->length() == 1 &&
4351 values_h->int_at(0) == java_lang_Thread::NEW,
4352 "Invalid threadStatus value");
4353
4354 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4355 1, /* only 1 substate */
4356 CHECK_NULL);
4357 names_h = objArrayHandle(THREAD, r);
4358 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4359 names_h->obj_at_put(0, name());
4360 break;
4361 }
4362 case JAVA_THREAD_STATE_RUNNABLE : {
4363 assert(values_h->length() == 1 &&
4364 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4365 "Invalid threadStatus value");
4366
4367 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4368 1, /* only 1 substate */
4369 CHECK_NULL);
4370 names_h = objArrayHandle(THREAD, r);
4371 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4372 names_h->obj_at_put(0, name());
4373 break;
4374 }
4375 case JAVA_THREAD_STATE_BLOCKED : {
4376 assert(values_h->length() == 1 &&
4377 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4378 "Invalid threadStatus value");
4379
4380 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4381 1, /* only 1 substate */
4382 CHECK_NULL);
4383 names_h = objArrayHandle(THREAD, r);
4384 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4385 names_h->obj_at_put(0, name());
4386 break;
4387 }
4388 case JAVA_THREAD_STATE_WAITING : {
4389 assert(values_h->length() == 2 &&
4390 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4391 values_h->int_at(1) == java_lang_Thread::PARKED,
4392 "Invalid threadStatus value");
4393 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4394 2, /* number of substates */
4395 CHECK_NULL);
4396 names_h = objArrayHandle(THREAD, r);
4397 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4398 CHECK_NULL);
4399 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4400 CHECK_NULL);
4401 names_h->obj_at_put(0, name0());
4402 names_h->obj_at_put(1, name1());
4403 break;
4404 }
4405 case JAVA_THREAD_STATE_TIMED_WAITING : {
4406 assert(values_h->length() == 3 &&
4407 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4408 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4409 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4410 "Invalid threadStatus value");
4411 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4412 3, /* number of substates */
4413 CHECK_NULL);
4414 names_h = objArrayHandle(THREAD, r);
4415 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4416 CHECK_NULL);
4417 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4418 CHECK_NULL);
4419 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4420 CHECK_NULL);
4421 names_h->obj_at_put(0, name0());
4422 names_h->obj_at_put(1, name1());
4423 names_h->obj_at_put(2, name2());
4424 break;
4425 }
4426 case JAVA_THREAD_STATE_TERMINATED : {
4427 assert(values_h->length() == 1 &&
4428 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4429 "Invalid threadStatus value");
4430 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4431 1, /* only 1 substate */
4432 CHECK_NULL);
4433 names_h = objArrayHandle(THREAD, r);
4434 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4435 names_h->obj_at_put(0, name());
4436 break;
4437 }
4438 default:
4439 // Unknown state - probably incompatible JDK version
4440 return NULL;
4441 }
4442 return (jobjectArray) JNIHandles::make_local(env, names_h());
4443 }
4444 JVM_END
4445
4446 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4447 {
4448 memset(info, 0, sizeof(info_size));
4449
4450 info->jvm_version = Abstract_VM_Version::jvm_version();
4451 info->update_version = 0; /* 0 in HotSpot Express VM */
4452 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4453
4454 // when we add a new capability in the jvm_version_info struct, we should also
4455 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4456 // counter defined in runtimeService.cpp.
4457 info->is_attachable = AttachListener::is_attach_supported();
4458 }
4459 JVM_END