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 // Not used; JVM_FindClassFromCaller replaces this.
812 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
813 jboolean init, jobject loader,
814 jboolean throwError))
815 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
816 throwError ? "error" : "exception");
817 // Java libraries should ensure that name is never null...
818 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
819 // It's impossible to create this class; the name cannot fit
820 // into the constant pool.
821 if (throwError) {
822 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
823 } else {
824 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
825 }
826 }
827 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
828 Handle h_loader(THREAD, JNIHandles::resolve(loader));
829 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
830 Handle(), throwError, THREAD);
831
832 if (TraceClassResolution && result != NULL) {
833 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
834 }
835 return result;
836 JVM_END
837
838 // Find a class with this name in this loader, using the caller's protection domain.
839 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
840 jboolean init, jobject loader,
841 jclass caller))
842 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
843 // Java libraries should ensure that name is never null...
844 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
845 // It's impossible to create this class; the name cannot fit
846 // into the constant pool.
847 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
848 }
849
850 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
851
852 oop loader_oop = JNIHandles::resolve(loader);
853 oop from_class = JNIHandles::resolve(caller);
854 oop protection_domain = NULL;
855 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
856 // NPE. Put it in another way, the bootstrap class loader has all permission and
857 // thus no checkPackageAccess equivalence in the VM class loader.
858 // The caller is also passed as NULL by the java code if there is no security
859 // manager to avoid the performance cost of getting the calling class.
860 if (from_class != NULL && loader_oop != NULL) {
861 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
862 }
863
864 Handle h_loader(THREAD, loader_oop);
865 Handle h_prot(THREAD, protection_domain);
866 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
867 h_prot, false, THREAD);
868
869 if (TraceClassResolution && result != NULL) {
870 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
871 }
872 return result;
873 JVM_END
874
875 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
876 jboolean init, jclass from))
877 JVMWrapper2("JVM_FindClassFromClass %s", name);
878 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
879 // It's impossible to create this class; the name cannot fit
880 // into the constant pool.
881 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
882 }
883 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
884 oop from_class_oop = JNIHandles::resolve(from);
885 Klass* from_class = (from_class_oop == NULL)
886 ? (Klass*)NULL
887 : java_lang_Class::as_Klass(from_class_oop);
888 oop class_loader = NULL;
889 oop protection_domain = NULL;
890 if (from_class != NULL) {
891 class_loader = from_class->class_loader();
892 protection_domain = from_class->protection_domain();
893 }
894 Handle h_loader(THREAD, class_loader);
895 Handle h_prot (THREAD, protection_domain);
896 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
897 h_prot, true, thread);
898
899 if (TraceClassResolution && result != NULL) {
900 // this function is generally only used for class loading during verification.
901 ResourceMark rm;
902 oop from_mirror = JNIHandles::resolve_non_null(from);
903 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
904 const char * from_name = from_class->external_name();
905
906 oop mirror = JNIHandles::resolve_non_null(result);
907 Klass* to_class = java_lang_Class::as_Klass(mirror);
908 const char * to = to_class->external_name();
909 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
910 }
911
912 return result;
913 JVM_END
914
915 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
916 if (loader.is_null()) {
917 return;
918 }
919
920 // check whether the current caller thread holds the lock or not.
921 // If not, increment the corresponding counter
922 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
923 ObjectSynchronizer::owner_self) {
924 counter->inc();
925 }
926 }
927
928 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
929 // and JVM_DefineClassWithSourceCond()
930 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
931 jobject loader, const jbyte *buf,
932 jsize len, jobject pd, const char *source,
933 jboolean verify, TRAPS) {
934 if (source == NULL) source = "__JVM_DefineClass__";
935
936 assert(THREAD->is_Java_thread(), "must be a JavaThread");
937 JavaThread* jt = (JavaThread*) THREAD;
938
939 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
940 ClassLoader::perf_define_appclass_selftime(),
941 ClassLoader::perf_define_appclasses(),
942 jt->get_thread_stat()->perf_recursion_counts_addr(),
943 jt->get_thread_stat()->perf_timers_addr(),
944 PerfClassTraceTime::DEFINE_CLASS);
945
946 if (UsePerfData) {
947 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
948 }
949
950 // Since exceptions can be thrown, class initialization can take place
951 // if name is NULL no check for class name in .class stream has to be made.
952 TempNewSymbol class_name = NULL;
953 if (name != NULL) {
954 const int str_len = (int)strlen(name);
955 if (str_len > Symbol::max_length()) {
956 // It's impossible to create this class; the name cannot fit
957 // into the constant pool.
958 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
959 }
960 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
961 }
962
963 ResourceMark rm(THREAD);
964 ClassFileStream st((u1*) buf, len, (char *)source);
965 Handle class_loader (THREAD, JNIHandles::resolve(loader));
966 if (UsePerfData) {
967 is_lock_held_by_thread(class_loader,
968 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
969 THREAD);
970 }
971 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
972 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
973 protection_domain, &st,
974 verify != 0,
975 CHECK_NULL);
976
977 if (TraceClassResolution && k != NULL) {
978 trace_class_resolution(k);
979 }
980
981 return (jclass) JNIHandles::make_local(env, k->java_mirror());
982 }
983
984
985 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
986 JVMWrapper2("JVM_DefineClass %s", name);
987
988 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
989 JVM_END
990
991
992 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
993 JVMWrapper2("JVM_DefineClassWithSource %s", name);
994
995 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
996 JVM_END
997
998 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
999 jobject loader, const jbyte *buf,
1000 jsize len, jobject pd,
1001 const char *source, jboolean verify))
1002 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1003
1004 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1005 JVM_END
1006
1007 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1008 JVMWrapper("JVM_FindLoadedClass");
1009 ResourceMark rm(THREAD);
1010
1011 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1012 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1013
1014 const char* str = java_lang_String::as_utf8_string(string());
1015 // Sanity check, don't expect null
1016 if (str == NULL) return NULL;
1017
1018 const int str_len = (int)strlen(str);
1019 if (str_len > Symbol::max_length()) {
1020 // It's impossible to create this class; the name cannot fit
1021 // into the constant pool.
1022 return NULL;
1023 }
1024 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1025
1026 // Security Note:
1027 // The Java level wrapper will perform the necessary security check allowing
1028 // us to pass the NULL as the initiating class loader.
1029 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1030 if (UsePerfData) {
1031 is_lock_held_by_thread(h_loader,
1032 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1033 THREAD);
1034 }
1035
1036 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1037 h_loader,
1038 Handle(),
1039 CHECK_NULL);
1040 #if INCLUDE_CDS
1041 if (k == NULL) {
1042 // If the class is not already loaded, try to see if it's in the shared
1043 // archive for the current classloader (h_loader).
1044 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1045 klass_name, h_loader, CHECK_NULL);
1046 k = ik();
1047 }
1048 #endif
1049 return (k == NULL) ? NULL :
1050 (jclass) JNIHandles::make_local(env, k->java_mirror());
1051 JVM_END
1052
1053
1054 // Reflection support //////////////////////////////////////////////////////////////////////////////
1055
1056 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1057 assert (cls != NULL, "illegal class");
1058 JVMWrapper("JVM_GetClassName");
1059 JvmtiVMObjectAllocEventCollector oam;
1060 ResourceMark rm(THREAD);
1061 const char* name;
1062 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1063 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1064 } else {
1065 // Consider caching interned string in Klass
1066 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1067 assert(k->is_klass(), "just checking");
1068 name = k->external_name();
1069 }
1070 oop result = StringTable::intern((char*) name, CHECK_NULL);
1071 return (jstring) JNIHandles::make_local(env, result);
1072 JVM_END
1073
1074
1075 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1076 JVMWrapper("JVM_GetClassInterfaces");
1077 JvmtiVMObjectAllocEventCollector oam;
1078 oop mirror = JNIHandles::resolve_non_null(cls);
1079
1080 // Special handling for primitive objects
1081 if (java_lang_Class::is_primitive(mirror)) {
1082 // Primitive objects does not have any interfaces
1083 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1084 return (jobjectArray) JNIHandles::make_local(env, r);
1085 }
1086
1087 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1088 // Figure size of result array
1089 int size;
1090 if (klass->oop_is_instance()) {
1091 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1092 } else {
1093 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1094 size = 2;
1095 }
1096
1097 // Allocate result array
1098 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1099 objArrayHandle result (THREAD, r);
1100 // Fill in result
1101 if (klass->oop_is_instance()) {
1102 // Regular instance klass, fill in all local interfaces
1103 for (int index = 0; index < size; index++) {
1104 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1105 result->obj_at_put(index, k->java_mirror());
1106 }
1107 } else {
1108 // All arrays implement java.lang.Cloneable and java.io.Serializable
1109 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1110 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1111 }
1112 return (jobjectArray) JNIHandles::make_local(env, result());
1113 JVM_END
1114
1115
1116 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1117 JVMWrapper("JVM_GetClassLoader");
1118 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1119 return NULL;
1120 }
1121 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1122 oop loader = k->class_loader();
1123 return JNIHandles::make_local(env, loader);
1124 JVM_END
1125
1126
1127 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1128 JVMWrapper("JVM_IsInterface");
1129 oop mirror = JNIHandles::resolve_non_null(cls);
1130 if (java_lang_Class::is_primitive(mirror)) {
1131 return JNI_FALSE;
1132 }
1133 Klass* k = java_lang_Class::as_Klass(mirror);
1134 jboolean result = k->is_interface();
1135 assert(!result || k->oop_is_instance(),
1136 "all interfaces are instance types");
1137 // The compiler intrinsic for isInterface tests the
1138 // Klass::_access_flags bits in the same way.
1139 return result;
1140 JVM_END
1141
1142
1143 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1144 JVMWrapper("JVM_GetClassSigners");
1145 JvmtiVMObjectAllocEventCollector oam;
1146 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1147 // There are no signers for primitive types
1148 return NULL;
1149 }
1150
1151 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1152
1153 // If there are no signers set in the class, or if the class
1154 // is an array, return NULL.
1155 if (signers == NULL) return NULL;
1156
1157 // copy of the signers array
1158 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1159 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1160 for (int index = 0; index < signers->length(); index++) {
1161 signers_copy->obj_at_put(index, signers->obj_at(index));
1162 }
1163
1164 // return the copy
1165 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1166 JVM_END
1167
1168
1169 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1170 JVMWrapper("JVM_SetClassSigners");
1171 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1172 // This call is ignored for primitive types and arrays.
1173 // Signers are only set once, ClassLoader.java, and thus shouldn't
1174 // be called with an array. Only the bootstrap loader creates arrays.
1175 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1176 if (k->oop_is_instance()) {
1177 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1178 }
1179 }
1180 JVM_END
1181
1182
1183 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1184 JVMWrapper("JVM_GetProtectionDomain");
1185 if (JNIHandles::resolve(cls) == NULL) {
1186 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1187 }
1188
1189 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1190 // Primitive types does not have a protection domain.
1191 return NULL;
1192 }
1193
1194 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1195 return (jobject) JNIHandles::make_local(env, pd);
1196 JVM_END
1197
1198
1199 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1200 // If there is a security manager and protection domain, check the access
1201 // in the protection domain, otherwise it is authorized.
1202 if (java_lang_System::has_security_manager()) {
1203
1204 // For bootstrapping, if pd implies method isn't in the JDK, allow
1205 // this context to revert to older behavior.
1206 // In this case the isAuthorized field in AccessControlContext is also not
1207 // present.
1208 if (Universe::protection_domain_implies_method() == NULL) {
1209 return true;
1210 }
1211
1212 // Whitelist certain access control contexts
1213 if (java_security_AccessControlContext::is_authorized(context)) {
1214 return true;
1215 }
1216
1217 oop prot = klass->protection_domain();
1218 if (prot != NULL) {
1219 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1220 // in the new wrapper.
1221 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1222 Handle h_prot(THREAD, prot);
1223 JavaValue result(T_BOOLEAN);
1224 JavaCallArguments args(h_prot);
1225 JavaCalls::call(&result, m, &args, CHECK_false);
1226 return (result.get_jboolean() != 0);
1227 }
1228 }
1229 return true;
1230 }
1231
1232 // Create an AccessControlContext with a protection domain with null codesource
1233 // and null permissions - which gives no permissions.
1234 oop create_dummy_access_control_context(TRAPS) {
1235 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1236 // new ProtectionDomain(null,null);
1237 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1238 Handle null_pd(THREAD, null_protection_domain);
1239
1240 // new ProtectionDomain[] {pd};
1241 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1242 context->obj_at_put(0, null_pd());
1243
1244 // new AccessControlContext(new ProtectionDomain[] {pd})
1245 objArrayHandle h_context(THREAD, context);
1246 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1247 return result;
1248 }
1249
1250 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1251 JVMWrapper("JVM_DoPrivileged");
1252
1253 if (action == NULL) {
1254 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1255 }
1256
1257 // Compute the frame initiating the do privileged operation and setup the privileged stack
1258 vframeStream vfst(thread);
1259 vfst.security_get_caller_frame(1);
1260
1261 if (vfst.at_end()) {
1262 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1263 }
1264
1265 Method* method = vfst.method();
1266 instanceKlassHandle klass (THREAD, method->method_holder());
1267
1268 // Check that action object understands "Object run()"
1269 Handle h_context;
1270 if (context != NULL) {
1271 h_context = Handle(THREAD, JNIHandles::resolve(context));
1272 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1273 if (!authorized) {
1274 // Create an unprivileged access control object and call it's run function
1275 // instead.
1276 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1277 h_context = Handle(THREAD, noprivs);
1278 }
1279 }
1280
1281 // Check that action object understands "Object run()"
1282 Handle object (THREAD, JNIHandles::resolve(action));
1283
1284 // get run() method
1285 Method* m_oop = object->klass()->uncached_lookup_method(
1286 vmSymbols::run_method_name(),
1287 vmSymbols::void_object_signature(),
1288 Klass::normal);
1289 methodHandle m (THREAD, m_oop);
1290 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1291 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1292 }
1293
1294 // Stack allocated list of privileged stack elements
1295 PrivilegedElement pi;
1296 if (!vfst.at_end()) {
1297 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1298 thread->set_privileged_stack_top(&pi);
1299 }
1300
1301
1302 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1303 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1304 Handle pending_exception;
1305 JavaValue result(T_OBJECT);
1306 JavaCallArguments args(object);
1307 JavaCalls::call(&result, m, &args, THREAD);
1308
1309 // done with action, remove ourselves from the list
1310 if (!vfst.at_end()) {
1311 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1312 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1313 }
1314
1315 if (HAS_PENDING_EXCEPTION) {
1316 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1317 CLEAR_PENDING_EXCEPTION;
1318
1319 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1320 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1321 // Throw a java.security.PrivilegedActionException(Exception e) exception
1322 JavaCallArguments args(pending_exception);
1323 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1324 vmSymbols::exception_void_signature(),
1325 &args);
1326 }
1327 }
1328
1329 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1330 return JNIHandles::make_local(env, (oop) result.get_jobject());
1331 JVM_END
1332
1333
1334 // Returns the inherited_access_control_context field of the running thread.
1335 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1336 JVMWrapper("JVM_GetInheritedAccessControlContext");
1337 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1338 return JNIHandles::make_local(env, result);
1339 JVM_END
1340
1341 class RegisterArrayForGC {
1342 private:
1343 JavaThread *_thread;
1344 public:
1345 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1346 _thread = thread;
1347 _thread->register_array_for_gc(array);
1348 }
1349
1350 ~RegisterArrayForGC() {
1351 _thread->register_array_for_gc(NULL);
1352 }
1353 };
1354
1355
1356 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1357 JVMWrapper("JVM_GetStackAccessControlContext");
1358 if (!UsePrivilegedStack) return NULL;
1359
1360 ResourceMark rm(THREAD);
1361 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1362 JvmtiVMObjectAllocEventCollector oam;
1363
1364 // count the protection domains on the execution stack. We collapse
1365 // duplicate consecutive protection domains into a single one, as
1366 // well as stopping when we hit a privileged frame.
1367
1368 // Use vframeStream to iterate through Java frames
1369 vframeStream vfst(thread);
1370
1371 oop previous_protection_domain = NULL;
1372 Handle privileged_context(thread, NULL);
1373 bool is_privileged = false;
1374 oop protection_domain = NULL;
1375
1376 for(; !vfst.at_end(); vfst.next()) {
1377 // get method of frame
1378 Method* method = vfst.method();
1379 intptr_t* frame_id = vfst.frame_id();
1380
1381 // check the privileged frames to see if we have a match
1382 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1383 // this frame is privileged
1384 is_privileged = true;
1385 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1386 protection_domain = thread->privileged_stack_top()->protection_domain();
1387 } else {
1388 protection_domain = method->method_holder()->protection_domain();
1389 }
1390
1391 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1392 local_array->push(protection_domain);
1393 previous_protection_domain = protection_domain;
1394 }
1395
1396 if (is_privileged) break;
1397 }
1398
1399
1400 // either all the domains on the stack were system domains, or
1401 // we had a privileged system domain
1402 if (local_array->is_empty()) {
1403 if (is_privileged && privileged_context.is_null()) return NULL;
1404
1405 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1406 return JNIHandles::make_local(env, result);
1407 }
1408
1409 // the resource area must be registered in case of a gc
1410 RegisterArrayForGC ragc(thread, local_array);
1411 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1412 local_array->length(), CHECK_NULL);
1413 objArrayHandle h_context(thread, context);
1414 for (int index = 0; index < local_array->length(); index++) {
1415 h_context->obj_at_put(index, local_array->at(index));
1416 }
1417
1418 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1419
1420 return JNIHandles::make_local(env, result);
1421 JVM_END
1422
1423
1424 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1425 JVMWrapper("JVM_IsArrayClass");
1426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1427 return (k != NULL) && k->oop_is_array() ? true : false;
1428 JVM_END
1429
1430
1431 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1432 JVMWrapper("JVM_IsPrimitiveClass");
1433 oop mirror = JNIHandles::resolve_non_null(cls);
1434 return (jboolean) java_lang_Class::is_primitive(mirror);
1435 JVM_END
1436
1437
1438 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1439 JVMWrapper("JVM_GetComponentType");
1440 oop mirror = JNIHandles::resolve_non_null(cls);
1441 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1442 return (jclass) JNIHandles::make_local(env, result);
1443 JVM_END
1444
1445
1446 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1447 JVMWrapper("JVM_GetClassModifiers");
1448 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1449 // Primitive type
1450 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1451 }
1452
1453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1454 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1455 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1456 return k->modifier_flags();
1457 JVM_END
1458
1459
1460 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1461
1462 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1463 JvmtiVMObjectAllocEventCollector oam;
1464 // ofClass is a reference to a java_lang_Class object. The mirror object
1465 // of an InstanceKlass
1466
1467 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1468 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1469 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1470 return (jobjectArray)JNIHandles::make_local(env, result);
1471 }
1472
1473 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1474 InnerClassesIterator iter(k);
1475
1476 if (iter.length() == 0) {
1477 // Neither an inner nor outer class
1478 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1479 return (jobjectArray)JNIHandles::make_local(env, result);
1480 }
1481
1482 // find inner class info
1483 constantPoolHandle cp(thread, k->constants());
1484 int length = iter.length();
1485
1486 // Allocate temp. result array
1487 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1488 objArrayHandle result (THREAD, r);
1489 int members = 0;
1490
1491 for (; !iter.done(); iter.next()) {
1492 int ioff = iter.inner_class_info_index();
1493 int ooff = iter.outer_class_info_index();
1494
1495 if (ioff != 0 && ooff != 0) {
1496 // Check to see if the name matches the class we're looking for
1497 // before attempting to find the class.
1498 if (cp->klass_name_at_matches(k, ooff)) {
1499 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1500 if (outer_klass == k()) {
1501 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1502 instanceKlassHandle inner_klass (THREAD, ik);
1503
1504 // Throws an exception if outer klass has not declared k as
1505 // an inner klass
1506 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1507
1508 result->obj_at_put(members, inner_klass->java_mirror());
1509 members++;
1510 }
1511 }
1512 }
1513 }
1514
1515 if (members != length) {
1516 // Return array of right length
1517 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1518 for(int i = 0; i < members; i++) {
1519 res->obj_at_put(i, result->obj_at(i));
1520 }
1521 return (jobjectArray)JNIHandles::make_local(env, res);
1522 }
1523
1524 return (jobjectArray)JNIHandles::make_local(env, result());
1525 JVM_END
1526
1527
1528 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1529 {
1530 // ofClass is a reference to a java_lang_Class object.
1531 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1532 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1533 return NULL;
1534 }
1535
1536 bool inner_is_member = false;
1537 Klass* outer_klass
1538 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1539 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1540 if (outer_klass == NULL) return NULL; // already a top-level class
1541 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1542 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1543 }
1544 JVM_END
1545
1546 // should be in InstanceKlass.cpp, but is here for historical reasons
1547 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1548 bool* inner_is_member,
1549 TRAPS) {
1550 Thread* thread = THREAD;
1551 InnerClassesIterator iter(k);
1552 if (iter.length() == 0) {
1553 // No inner class info => no declaring class
1554 return NULL;
1555 }
1556
1557 constantPoolHandle i_cp(thread, k->constants());
1558
1559 bool found = false;
1560 Klass* ok;
1561 instanceKlassHandle outer_klass;
1562 *inner_is_member = false;
1563
1564 // Find inner_klass attribute
1565 for (; !iter.done() && !found; iter.next()) {
1566 int ioff = iter.inner_class_info_index();
1567 int ooff = iter.outer_class_info_index();
1568 int noff = iter.inner_name_index();
1569 if (ioff != 0) {
1570 // Check to see if the name matches the class we're looking for
1571 // before attempting to find the class.
1572 if (i_cp->klass_name_at_matches(k, ioff)) {
1573 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1574 found = (k() == inner_klass);
1575 if (found && ooff != 0) {
1576 ok = i_cp->klass_at(ooff, CHECK_NULL);
1577 outer_klass = instanceKlassHandle(thread, ok);
1578 *inner_is_member = true;
1579 }
1580 }
1581 }
1582 }
1583
1584 if (found && outer_klass.is_null()) {
1585 // It may be anonymous; try for that.
1586 int encl_method_class_idx = k->enclosing_method_class_index();
1587 if (encl_method_class_idx != 0) {
1588 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1589 outer_klass = instanceKlassHandle(thread, ok);
1590 *inner_is_member = false;
1591 }
1592 }
1593
1594 // If no inner class attribute found for this class.
1595 if (outer_klass.is_null()) return NULL;
1596
1597 // Throws an exception if outer klass has not declared k as an inner klass
1598 // We need evidence that each klass knows about the other, or else
1599 // the system could allow a spoof of an inner class to gain access rights.
1600 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1601 return outer_klass();
1602 }
1603
1604 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1605 assert (cls != NULL, "illegal class");
1606 JVMWrapper("JVM_GetClassSignature");
1607 JvmtiVMObjectAllocEventCollector oam;
1608 ResourceMark rm(THREAD);
1609 // Return null for arrays and primatives
1610 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1612 if (k->oop_is_instance()) {
1613 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1614 if (sym == NULL) return NULL;
1615 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1616 return (jstring) JNIHandles::make_local(env, str());
1617 }
1618 }
1619 return NULL;
1620 JVM_END
1621
1622
1623 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1624 assert (cls != NULL, "illegal class");
1625 JVMWrapper("JVM_GetClassAnnotations");
1626
1627 // Return null for arrays and primitives
1628 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1629 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1630 if (k->oop_is_instance()) {
1631 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1632 return (jbyteArray) JNIHandles::make_local(env, a);
1633 }
1634 }
1635 return NULL;
1636 JVM_END
1637
1638
1639 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1640 // some of this code was adapted from from jni_FromReflectedField
1641
1642 oop reflected = JNIHandles::resolve_non_null(field);
1643 oop mirror = java_lang_reflect_Field::clazz(reflected);
1644 Klass* k = java_lang_Class::as_Klass(mirror);
1645 int slot = java_lang_reflect_Field::slot(reflected);
1646 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1647
1648 KlassHandle kh(THREAD, k);
1649 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1650
1651 if (modifiers & JVM_ACC_STATIC) {
1652 // for static fields we only look in the current class
1653 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1654 assert(false, "cannot find static field");
1655 return false;
1656 }
1657 } else {
1658 // for instance fields we start with the current class and work
1659 // our way up through the superclass chain
1660 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1661 assert(false, "cannot find instance field");
1662 return false;
1663 }
1664 }
1665 return true;
1666 }
1667
1668 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1669 // field is a handle to a java.lang.reflect.Field object
1670 assert(field != NULL, "illegal field");
1671 JVMWrapper("JVM_GetFieldAnnotations");
1672
1673 fieldDescriptor fd;
1674 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1675 if (!gotFd) {
1676 return NULL;
1677 }
1678
1679 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1680 JVM_END
1681
1682
1683 static Method* jvm_get_method_common(jobject method) {
1684 // some of this code was adapted from from jni_FromReflectedMethod
1685
1686 oop reflected = JNIHandles::resolve_non_null(method);
1687 oop mirror = NULL;
1688 int slot = 0;
1689
1690 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1691 mirror = java_lang_reflect_Constructor::clazz(reflected);
1692 slot = java_lang_reflect_Constructor::slot(reflected);
1693 } else {
1694 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1695 "wrong type");
1696 mirror = java_lang_reflect_Method::clazz(reflected);
1697 slot = java_lang_reflect_Method::slot(reflected);
1698 }
1699 Klass* k = java_lang_Class::as_Klass(mirror);
1700
1701 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1702 assert(m != NULL, "cannot find method");
1703 return m; // caller has to deal with NULL in product mode
1704 }
1705
1706
1707 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1708 JVMWrapper("JVM_GetMethodAnnotations");
1709
1710 // method is a handle to a java.lang.reflect.Method object
1711 Method* m = jvm_get_method_common(method);
1712 if (m == NULL) {
1713 return NULL;
1714 }
1715
1716 return (jbyteArray) JNIHandles::make_local(env,
1717 Annotations::make_java_array(m->annotations(), THREAD));
1718 JVM_END
1719
1720
1721 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1722 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1723
1724 // method is a handle to a java.lang.reflect.Method object
1725 Method* m = jvm_get_method_common(method);
1726 if (m == NULL) {
1727 return NULL;
1728 }
1729
1730 return (jbyteArray) JNIHandles::make_local(env,
1731 Annotations::make_java_array(m->annotation_default(), THREAD));
1732 JVM_END
1733
1734
1735 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1736 JVMWrapper("JVM_GetMethodParameterAnnotations");
1737
1738 // method is a handle to a java.lang.reflect.Method object
1739 Method* m = jvm_get_method_common(method);
1740 if (m == NULL) {
1741 return NULL;
1742 }
1743
1744 return (jbyteArray) JNIHandles::make_local(env,
1745 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1746 JVM_END
1747
1748 /* Type use annotations support (JDK 1.8) */
1749
1750 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1751 assert (cls != NULL, "illegal class");
1752 JVMWrapper("JVM_GetClassTypeAnnotations");
1753 ResourceMark rm(THREAD);
1754 // Return null for arrays and primitives
1755 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1756 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1757 if (k->oop_is_instance()) {
1758 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1759 if (type_annotations != NULL) {
1760 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1761 return (jbyteArray) JNIHandles::make_local(env, a);
1762 }
1763 }
1764 }
1765 return NULL;
1766 JVM_END
1767
1768 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1769 assert (method != NULL, "illegal method");
1770 JVMWrapper("JVM_GetMethodTypeAnnotations");
1771
1772 // method is a handle to a java.lang.reflect.Method object
1773 Method* m = jvm_get_method_common(method);
1774 if (m == NULL) {
1775 return NULL;
1776 }
1777
1778 AnnotationArray* type_annotations = m->type_annotations();
1779 if (type_annotations != NULL) {
1780 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1781 return (jbyteArray) JNIHandles::make_local(env, a);
1782 }
1783
1784 return NULL;
1785 JVM_END
1786
1787 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1788 assert (field != NULL, "illegal field");
1789 JVMWrapper("JVM_GetFieldTypeAnnotations");
1790
1791 fieldDescriptor fd;
1792 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1793 if (!gotFd) {
1794 return NULL;
1795 }
1796
1797 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1798 JVM_END
1799
1800 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1801 if (!cp->is_within_bounds(index)) {
1802 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1803 }
1804 }
1805
1806 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1807 {
1808 JVMWrapper("JVM_GetMethodParameters");
1809 // method is a handle to a java.lang.reflect.Method object
1810 Method* method_ptr = jvm_get_method_common(method);
1811 methodHandle mh (THREAD, method_ptr);
1812 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1813 const int num_params = mh->method_parameters_length();
1814
1815 if (0 != num_params) {
1816 // make sure all the symbols are properly formatted
1817 for (int i = 0; i < num_params; i++) {
1818 MethodParametersElement* params = mh->method_parameters_start();
1819 int index = params[i].name_cp_index;
1820 bounds_check(mh->constants(), index, CHECK_NULL);
1821
1822 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1823 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1824 "Wrong type at constant pool index");
1825 }
1826
1827 }
1828
1829 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1830 objArrayHandle result (THREAD, result_oop);
1831
1832 for (int i = 0; i < num_params; i++) {
1833 MethodParametersElement* params = mh->method_parameters_start();
1834 // For a 0 index, give a NULL symbol
1835 Symbol* sym = 0 != params[i].name_cp_index ?
1836 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1837 int flags = params[i].flags;
1838 oop param = Reflection::new_parameter(reflected_method, i, sym,
1839 flags, CHECK_NULL);
1840 result->obj_at_put(i, param);
1841 }
1842 return (jobjectArray)JNIHandles::make_local(env, result());
1843 } else {
1844 return (jobjectArray)NULL;
1845 }
1846 }
1847 JVM_END
1848
1849 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1850
1851 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1852 {
1853 JVMWrapper("JVM_GetClassDeclaredFields");
1854 JvmtiVMObjectAllocEventCollector oam;
1855
1856 // Exclude primitive types and array types
1857 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1858 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1859 // Return empty array
1860 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1861 return (jobjectArray) JNIHandles::make_local(env, res);
1862 }
1863
1864 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1865 constantPoolHandle cp(THREAD, k->constants());
1866
1867 // Ensure class is linked
1868 k->link_class(CHECK_NULL);
1869
1870 // 4496456 We need to filter out java.lang.Throwable.backtrace
1871 bool skip_backtrace = false;
1872
1873 // Allocate result
1874 int num_fields;
1875
1876 if (publicOnly) {
1877 num_fields = 0;
1878 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1879 if (fs.access_flags().is_public()) ++num_fields;
1880 }
1881 } else {
1882 num_fields = k->java_fields_count();
1883
1884 if (k() == SystemDictionary::Throwable_klass()) {
1885 num_fields--;
1886 skip_backtrace = true;
1887 }
1888 }
1889
1890 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1891 objArrayHandle result (THREAD, r);
1892
1893 int out_idx = 0;
1894 fieldDescriptor fd;
1895 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1896 if (skip_backtrace) {
1897 // 4496456 skip java.lang.Throwable.backtrace
1898 int offset = fs.offset();
1899 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1900 }
1901
1902 if (!publicOnly || fs.access_flags().is_public()) {
1903 fd.reinitialize(k(), fs.index());
1904 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1905 result->obj_at_put(out_idx, field);
1906 ++out_idx;
1907 }
1908 }
1909 assert(out_idx == num_fields, "just checking");
1910 return (jobjectArray) JNIHandles::make_local(env, result());
1911 }
1912 JVM_END
1913
1914 static bool select_method(methodHandle method, bool want_constructor) {
1915 if (want_constructor) {
1916 return (method->is_initializer() && !method->is_static());
1917 } else {
1918 return (!method->is_initializer() && !method->is_overpass());
1919 }
1920 }
1921
1922 static jobjectArray get_class_declared_methods_helper(
1923 JNIEnv *env,
1924 jclass ofClass, jboolean publicOnly,
1925 bool want_constructor,
1926 Klass* klass, TRAPS) {
1927
1928 JvmtiVMObjectAllocEventCollector oam;
1929
1930 // Exclude primitive types and array types
1931 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1932 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1933 // Return empty array
1934 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1935 return (jobjectArray) JNIHandles::make_local(env, res);
1936 }
1937
1938 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1939
1940 // Ensure class is linked
1941 k->link_class(CHECK_NULL);
1942
1943 Array<Method*>* methods = k->methods();
1944 int methods_length = methods->length();
1945
1946 // Save original method_idnum in case of redefinition, which can change
1947 // the idnum of obsolete methods. The new method will have the same idnum
1948 // but if we refresh the methods array, the counts will be wrong.
1949 ResourceMark rm(THREAD);
1950 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1951 int num_methods = 0;
1952
1953 for (int i = 0; i < methods_length; i++) {
1954 methodHandle method(THREAD, methods->at(i));
1955 if (select_method(method, want_constructor)) {
1956 if (!publicOnly || method->is_public()) {
1957 idnums->push(method->method_idnum());
1958 ++num_methods;
1959 }
1960 }
1961 }
1962
1963 // Allocate result
1964 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1965 objArrayHandle result (THREAD, r);
1966
1967 // Now just put the methods that we selected above, but go by their idnum
1968 // in case of redefinition. The methods can be redefined at any safepoint,
1969 // so above when allocating the oop array and below when creating reflect
1970 // objects.
1971 for (int i = 0; i < num_methods; i++) {
1972 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1973 if (method.is_null()) {
1974 // Method may have been deleted and seems this API can handle null
1975 // Otherwise should probably put a method that throws NSME
1976 result->obj_at_put(i, NULL);
1977 } else {
1978 oop m;
1979 if (want_constructor) {
1980 m = Reflection::new_constructor(method, CHECK_NULL);
1981 } else {
1982 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1983 }
1984 result->obj_at_put(i, m);
1985 }
1986 }
1987
1988 return (jobjectArray) JNIHandles::make_local(env, result());
1989 }
1990
1991 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1992 {
1993 JVMWrapper("JVM_GetClassDeclaredMethods");
1994 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1995 /*want_constructor*/ false,
1996 SystemDictionary::reflect_Method_klass(), THREAD);
1997 }
1998 JVM_END
1999
2000 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2001 {
2002 JVMWrapper("JVM_GetClassDeclaredConstructors");
2003 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2004 /*want_constructor*/ true,
2005 SystemDictionary::reflect_Constructor_klass(), THREAD);
2006 }
2007 JVM_END
2008
2009 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2010 {
2011 JVMWrapper("JVM_GetClassAccessFlags");
2012 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2013 // Primitive type
2014 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2015 }
2016
2017 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2018 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2019 }
2020 JVM_END
2021
2022
2023 // Constant pool access //////////////////////////////////////////////////////////
2024
2025 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2026 {
2027 JVMWrapper("JVM_GetClassConstantPool");
2028 JvmtiVMObjectAllocEventCollector oam;
2029
2030 // Return null for primitives and arrays
2031 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2032 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2033 if (k->oop_is_instance()) {
2034 instanceKlassHandle k_h(THREAD, k);
2035 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2036 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2037 return JNIHandles::make_local(jcp());
2038 }
2039 }
2040 return NULL;
2041 }
2042 JVM_END
2043
2044
2045 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2046 {
2047 JVMWrapper("JVM_ConstantPoolGetSize");
2048 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2049 return cp->length();
2050 }
2051 JVM_END
2052
2053
2054 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2055 {
2056 JVMWrapper("JVM_ConstantPoolGetClassAt");
2057 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058 bounds_check(cp, index, CHECK_NULL);
2059 constantTag tag = cp->tag_at(index);
2060 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2061 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2062 }
2063 Klass* k = cp->klass_at(index, CHECK_NULL);
2064 return (jclass) JNIHandles::make_local(k->java_mirror());
2065 }
2066 JVM_END
2067
2068 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2069 {
2070 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2071 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_NULL);
2073 constantTag tag = cp->tag_at(index);
2074 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2075 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2076 }
2077 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2078 if (k == NULL) return NULL;
2079 return (jclass) JNIHandles::make_local(k->java_mirror());
2080 }
2081 JVM_END
2082
2083 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2084 constantTag tag = cp->tag_at(index);
2085 if (!tag.is_method() && !tag.is_interface_method()) {
2086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2087 }
2088 int klass_ref = cp->uncached_klass_ref_index_at(index);
2089 Klass* k_o;
2090 if (force_resolution) {
2091 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2092 } else {
2093 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2094 if (k_o == NULL) return NULL;
2095 }
2096 instanceKlassHandle k(THREAD, k_o);
2097 Symbol* name = cp->uncached_name_ref_at(index);
2098 Symbol* sig = cp->uncached_signature_ref_at(index);
2099 methodHandle m (THREAD, k->find_method(name, sig));
2100 if (m.is_null()) {
2101 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2102 }
2103 oop method;
2104 if (!m->is_initializer() || m->is_static()) {
2105 method = Reflection::new_method(m, true, true, CHECK_NULL);
2106 } else {
2107 method = Reflection::new_constructor(m, CHECK_NULL);
2108 }
2109 return JNIHandles::make_local(method);
2110 }
2111
2112 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2113 {
2114 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2115 JvmtiVMObjectAllocEventCollector oam;
2116 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_NULL);
2118 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2119 return res;
2120 }
2121 JVM_END
2122
2123 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2124 {
2125 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2126 JvmtiVMObjectAllocEventCollector oam;
2127 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2128 bounds_check(cp, index, CHECK_NULL);
2129 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2130 return res;
2131 }
2132 JVM_END
2133
2134 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2135 constantTag tag = cp->tag_at(index);
2136 if (!tag.is_field()) {
2137 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2138 }
2139 int klass_ref = cp->uncached_klass_ref_index_at(index);
2140 Klass* k_o;
2141 if (force_resolution) {
2142 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2143 } else {
2144 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2145 if (k_o == NULL) return NULL;
2146 }
2147 instanceKlassHandle k(THREAD, k_o);
2148 Symbol* name = cp->uncached_name_ref_at(index);
2149 Symbol* sig = cp->uncached_signature_ref_at(index);
2150 fieldDescriptor fd;
2151 Klass* target_klass = k->find_field(name, sig, &fd);
2152 if (target_klass == NULL) {
2153 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2154 }
2155 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2156 return JNIHandles::make_local(field);
2157 }
2158
2159 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2160 {
2161 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2162 JvmtiVMObjectAllocEventCollector oam;
2163 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2164 bounds_check(cp, index, CHECK_NULL);
2165 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2166 return res;
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2171 {
2172 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2173 JvmtiVMObjectAllocEventCollector oam;
2174 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175 bounds_check(cp, index, CHECK_NULL);
2176 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2177 return res;
2178 }
2179 JVM_END
2180
2181 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2182 {
2183 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2184 JvmtiVMObjectAllocEventCollector oam;
2185 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2186 bounds_check(cp, index, CHECK_NULL);
2187 constantTag tag = cp->tag_at(index);
2188 if (!tag.is_field_or_method()) {
2189 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2190 }
2191 int klass_ref = cp->uncached_klass_ref_index_at(index);
2192 Symbol* klass_name = cp->klass_name_at(klass_ref);
2193 Symbol* member_name = cp->uncached_name_ref_at(index);
2194 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2195 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2196 objArrayHandle dest(THREAD, dest_o);
2197 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2198 dest->obj_at_put(0, str());
2199 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2200 dest->obj_at_put(1, str());
2201 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2202 dest->obj_at_put(2, str());
2203 return (jobjectArray) JNIHandles::make_local(dest());
2204 }
2205 JVM_END
2206
2207 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2208 {
2209 JVMWrapper("JVM_ConstantPoolGetIntAt");
2210 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211 bounds_check(cp, index, CHECK_0);
2212 constantTag tag = cp->tag_at(index);
2213 if (!tag.is_int()) {
2214 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215 }
2216 return cp->int_at(index);
2217 }
2218 JVM_END
2219
2220 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2221 {
2222 JVMWrapper("JVM_ConstantPoolGetLongAt");
2223 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2224 bounds_check(cp, index, CHECK_(0L));
2225 constantTag tag = cp->tag_at(index);
2226 if (!tag.is_long()) {
2227 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2228 }
2229 return cp->long_at(index);
2230 }
2231 JVM_END
2232
2233 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2234 {
2235 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2236 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2237 bounds_check(cp, index, CHECK_(0.0f));
2238 constantTag tag = cp->tag_at(index);
2239 if (!tag.is_float()) {
2240 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2241 }
2242 return cp->float_at(index);
2243 }
2244 JVM_END
2245
2246 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2247 {
2248 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2249 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2250 bounds_check(cp, index, CHECK_(0.0));
2251 constantTag tag = cp->tag_at(index);
2252 if (!tag.is_double()) {
2253 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2254 }
2255 return cp->double_at(index);
2256 }
2257 JVM_END
2258
2259 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2260 {
2261 JVMWrapper("JVM_ConstantPoolGetStringAt");
2262 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2263 bounds_check(cp, index, CHECK_NULL);
2264 constantTag tag = cp->tag_at(index);
2265 if (!tag.is_string()) {
2266 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2267 }
2268 oop str = cp->string_at(index, CHECK_NULL);
2269 return (jstring) JNIHandles::make_local(str);
2270 }
2271 JVM_END
2272
2273 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2274 {
2275 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2276 JvmtiVMObjectAllocEventCollector oam;
2277 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2278 bounds_check(cp, index, CHECK_NULL);
2279 constantTag tag = cp->tag_at(index);
2280 if (!tag.is_symbol()) {
2281 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2282 }
2283 Symbol* sym = cp->symbol_at(index);
2284 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2285 return (jstring) JNIHandles::make_local(str());
2286 }
2287 JVM_END
2288
2289
2290 // Assertion support. //////////////////////////////////////////////////////////
2291
2292 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2293 JVMWrapper("JVM_DesiredAssertionStatus");
2294 assert(cls != NULL, "bad class");
2295
2296 oop r = JNIHandles::resolve(cls);
2297 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2298 if (java_lang_Class::is_primitive(r)) return false;
2299
2300 Klass* k = java_lang_Class::as_Klass(r);
2301 assert(k->oop_is_instance(), "must be an instance klass");
2302 if (! k->oop_is_instance()) return false;
2303
2304 ResourceMark rm(THREAD);
2305 const char* name = k->name()->as_C_string();
2306 bool system_class = k->class_loader() == NULL;
2307 return JavaAssertions::enabled(name, system_class);
2308
2309 JVM_END
2310
2311
2312 // Return a new AssertionStatusDirectives object with the fields filled in with
2313 // command-line assertion arguments (i.e., -ea, -da).
2314 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2315 JVMWrapper("JVM_AssertionStatusDirectives");
2316 JvmtiVMObjectAllocEventCollector oam;
2317 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2318 return JNIHandles::make_local(env, asd);
2319 JVM_END
2320
2321 // Verification ////////////////////////////////////////////////////////////////////////////////
2322
2323 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2324
2325 // RedefineClasses support: bug 6214132 caused verification to fail.
2326 // All functions from this section should call the jvmtiThreadSate function:
2327 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2328 // The function returns a Klass* of the _scratch_class if the verifier
2329 // was invoked in the middle of the class redefinition.
2330 // Otherwise it returns its argument value which is the _the_class Klass*.
2331 // Please, refer to the description in the jvmtiThreadSate.hpp.
2332
2333 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2334 JVMWrapper("JVM_GetClassNameUTF");
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 return k->name()->as_utf8();
2338 JVM_END
2339
2340
2341 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2342 JVMWrapper("JVM_GetClassCPTypes");
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345 // types will have length zero if this is not an InstanceKlass
2346 // (length is determined by call to JVM_GetClassCPEntriesCount)
2347 if (k->oop_is_instance()) {
2348 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2349 for (int index = cp->length() - 1; index >= 0; index--) {
2350 constantTag tag = cp->tag_at(index);
2351 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2352 }
2353 }
2354 JVM_END
2355
2356
2357 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2358 JVMWrapper("JVM_GetClassCPEntriesCount");
2359 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2361 if (!k->oop_is_instance())
2362 return 0;
2363 return InstanceKlass::cast(k)->constants()->length();
2364 JVM_END
2365
2366
2367 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2368 JVMWrapper("JVM_GetClassFieldsCount");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 if (!k->oop_is_instance())
2372 return 0;
2373 return InstanceKlass::cast(k)->java_fields_count();
2374 JVM_END
2375
2376
2377 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2378 JVMWrapper("JVM_GetClassMethodsCount");
2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 if (!k->oop_is_instance())
2382 return 0;
2383 return InstanceKlass::cast(k)->methods()->length();
2384 JVM_END
2385
2386
2387 // The following methods, used for the verifier, are never called with
2388 // array klasses, so a direct cast to InstanceKlass is safe.
2389 // Typically, these methods are called in a loop with bounds determined
2390 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2391 // zero for arrays.
2392 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2393 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2394 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2395 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2396 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2397 int length = method->checked_exceptions_length();
2398 if (length > 0) {
2399 CheckedExceptionElement* table= method->checked_exceptions_start();
2400 for (int i = 0; i < length; i++) {
2401 exceptions[i] = table[i].class_cp_index;
2402 }
2403 }
2404 JVM_END
2405
2406
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2408 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->checked_exceptions_length();
2413 JVM_END
2414
2415
2416 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2417 JVMWrapper("JVM_GetMethodIxByteCode");
2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2421 memcpy(code, method->code_base(), method->code_size());
2422 JVM_END
2423
2424
2425 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2426 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430 return method->code_size();
2431 JVM_END
2432
2433
2434 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2435 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439 ExceptionTable extable(method);
2440 entry->start_pc = extable.start_pc(entry_index);
2441 entry->end_pc = extable.end_pc(entry_index);
2442 entry->handler_pc = extable.handler_pc(entry_index);
2443 entry->catchType = extable.catch_type_index(entry_index);
2444 JVM_END
2445
2446
2447 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2448 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->exception_table_length();
2453 JVM_END
2454
2455
2456 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2457 JVMWrapper("JVM_GetMethodIxModifiers");
2458 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2459 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2460 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2461 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2462 JVM_END
2463
2464
2465 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2466 JVMWrapper("JVM_GetFieldIxModifiers");
2467 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2469 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2470 JVM_END
2471
2472
2473 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2474 JVMWrapper("JVM_GetMethodIxLocalsCount");
2475 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2476 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2477 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2478 return method->max_locals();
2479 JVM_END
2480
2481
2482 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2483 JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2488 JVM_END
2489
2490
2491 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2492 JVMWrapper("JVM_GetMethodIxMaxStack");
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->verifier_max_stack();
2497 JVM_END
2498
2499
2500 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2501 JVMWrapper("JVM_IsConstructorIx");
2502 ResourceMark rm(THREAD);
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2506 return method->name() == vmSymbols::object_initializer_name();
2507 JVM_END
2508
2509
2510 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2511 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2512 ResourceMark rm(THREAD);
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2516 return method->is_overpass();
2517 JVM_END
2518
2519 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2520 JVMWrapper("JVM_GetMethodIxIxUTF");
2521 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2522 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2523 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2524 return method->name()->as_utf8();
2525 JVM_END
2526
2527
2528 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2529 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2533 return method->signature()->as_utf8();
2534 JVM_END
2535
2536 /**
2537 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2538 * read entries in the constant pool. Since the old verifier always
2539 * works on a copy of the code, it will not see any rewriting that
2540 * may possibly occur in the middle of verification. So it is important
2541 * that nothing it calls tries to use the cpCache instead of the raw
2542 * constant pool, so we must use cp->uncached_x methods when appropriate.
2543 */
2544 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2545 JVMWrapper("JVM_GetCPFieldNameUTF");
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2548 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2549 switch (cp->tag_at(cp_index).value()) {
2550 case JVM_CONSTANT_Fieldref:
2551 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2552 default:
2553 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2554 }
2555 ShouldNotReachHere();
2556 return NULL;
2557 JVM_END
2558
2559
2560 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2561 JVMWrapper("JVM_GetCPMethodNameUTF");
2562 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2563 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2564 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2565 switch (cp->tag_at(cp_index).value()) {
2566 case JVM_CONSTANT_InterfaceMethodref:
2567 case JVM_CONSTANT_Methodref:
2568 case JVM_CONSTANT_NameAndType: // for invokedynamic
2569 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2570 default:
2571 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2572 }
2573 ShouldNotReachHere();
2574 return NULL;
2575 JVM_END
2576
2577
2578 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2579 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2580 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2581 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2582 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2583 switch (cp->tag_at(cp_index).value()) {
2584 case JVM_CONSTANT_InterfaceMethodref:
2585 case JVM_CONSTANT_Methodref:
2586 case JVM_CONSTANT_NameAndType: // for invokedynamic
2587 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2588 default:
2589 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2590 }
2591 ShouldNotReachHere();
2592 return NULL;
2593 JVM_END
2594
2595
2596 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2597 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2600 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2601 switch (cp->tag_at(cp_index).value()) {
2602 case JVM_CONSTANT_Fieldref:
2603 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2604 default:
2605 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2606 }
2607 ShouldNotReachHere();
2608 return NULL;
2609 JVM_END
2610
2611
2612 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2613 JVMWrapper("JVM_GetCPClassNameUTF");
2614 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2615 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2616 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2617 Symbol* classname = cp->klass_name_at(cp_index);
2618 return classname->as_utf8();
2619 JVM_END
2620
2621
2622 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2623 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2627 switch (cp->tag_at(cp_index).value()) {
2628 case JVM_CONSTANT_Fieldref: {
2629 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2630 Symbol* classname = cp->klass_name_at(class_index);
2631 return classname->as_utf8();
2632 }
2633 default:
2634 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2635 }
2636 ShouldNotReachHere();
2637 return NULL;
2638 JVM_END
2639
2640
2641 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2642 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2643 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2644 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2645 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2646 switch (cp->tag_at(cp_index).value()) {
2647 case JVM_CONSTANT_Methodref:
2648 case JVM_CONSTANT_InterfaceMethodref: {
2649 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2650 Symbol* classname = cp->klass_name_at(class_index);
2651 return classname->as_utf8();
2652 }
2653 default:
2654 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2655 }
2656 ShouldNotReachHere();
2657 return NULL;
2658 JVM_END
2659
2660
2661 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2662 JVMWrapper("JVM_GetCPFieldModifiers");
2663 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2664 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2665 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2666 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2667 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2668 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2669 switch (cp->tag_at(cp_index).value()) {
2670 case JVM_CONSTANT_Fieldref: {
2671 Symbol* name = cp->uncached_name_ref_at(cp_index);
2672 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2673 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2674 if (fs.name() == name && fs.signature() == signature) {
2675 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2676 }
2677 }
2678 return -1;
2679 }
2680 default:
2681 fatal("JVM_GetCPFieldModifiers: illegal constant");
2682 }
2683 ShouldNotReachHere();
2684 return 0;
2685 JVM_END
2686
2687
2688 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2689 JVMWrapper("JVM_GetCPMethodModifiers");
2690 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2691 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2692 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2693 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2694 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2695 switch (cp->tag_at(cp_index).value()) {
2696 case JVM_CONSTANT_Methodref:
2697 case JVM_CONSTANT_InterfaceMethodref: {
2698 Symbol* name = cp->uncached_name_ref_at(cp_index);
2699 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2700 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2701 int methods_count = methods->length();
2702 for (int i = 0; i < methods_count; i++) {
2703 Method* method = methods->at(i);
2704 if (method->name() == name && method->signature() == signature) {
2705 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2706 }
2707 }
2708 return -1;
2709 }
2710 default:
2711 fatal("JVM_GetCPMethodModifiers: illegal constant");
2712 }
2713 ShouldNotReachHere();
2714 return 0;
2715 JVM_END
2716
2717
2718 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2719
2720 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2721 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2722 JVM_END
2723
2724
2725 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2726 JVMWrapper("JVM_IsSameClassPackage");
2727 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2728 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2729 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2730 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2731 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2732 JVM_END
2733
2734
2735 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2736
2737 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2738 JVMWrapper2("JVM_Open (%s)", fname);
2739
2740 //%note jvm_r6
2741 int result = os::open(fname, flags, mode);
2742 if (result >= 0) {
2743 return result;
2744 } else {
2745 switch(errno) {
2746 case EEXIST:
2747 return JVM_EEXIST;
2748 default:
2749 return -1;
2750 }
2751 }
2752 JVM_END
2753
2754
2755 JVM_LEAF(jint, JVM_Close(jint fd))
2756 JVMWrapper2("JVM_Close (0x%x)", fd);
2757 //%note jvm_r6
2758 return os::close(fd);
2759 JVM_END
2760
2761
2762 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2763 JVMWrapper2("JVM_Read (0x%x)", fd);
2764
2765 //%note jvm_r6
2766 return (jint)os::restartable_read(fd, buf, nbytes);
2767 JVM_END
2768
2769
2770 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2771 JVMWrapper2("JVM_Write (0x%x)", fd);
2772
2773 //%note jvm_r6
2774 return (jint)os::write(fd, buf, nbytes);
2775 JVM_END
2776
2777
2778 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2779 JVMWrapper2("JVM_Available (0x%x)", fd);
2780 //%note jvm_r6
2781 return os::available(fd, pbytes);
2782 JVM_END
2783
2784
2785 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2786 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2787 //%note jvm_r6
2788 return os::lseek(fd, offset, whence);
2789 JVM_END
2790
2791
2792 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2793 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2794 return os::ftruncate(fd, length);
2795 JVM_END
2796
2797
2798 JVM_LEAF(jint, JVM_Sync(jint fd))
2799 JVMWrapper2("JVM_Sync (0x%x)", fd);
2800 //%note jvm_r6
2801 return os::fsync(fd);
2802 JVM_END
2803
2804
2805 // Printing support //////////////////////////////////////////////////
2806 extern "C" {
2807
2808 ATTRIBUTE_PRINTF(3, 0)
2809 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2810 // see bug 4399518, 4417214
2811 if ((intptr_t)count <= 0) return -1;
2812 return vsnprintf(str, count, fmt, args);
2813 }
2814
2815 ATTRIBUTE_PRINTF(3, 0)
2816 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2817 va_list args;
2818 int len;
2819 va_start(args, fmt);
2820 len = jio_vsnprintf(str, count, fmt, args);
2821 va_end(args);
2822 return len;
2823 }
2824
2825 ATTRIBUTE_PRINTF(2,3)
2826 int jio_fprintf(FILE* f, const char *fmt, ...) {
2827 int len;
2828 va_list args;
2829 va_start(args, fmt);
2830 len = jio_vfprintf(f, fmt, args);
2831 va_end(args);
2832 return len;
2833 }
2834
2835 ATTRIBUTE_PRINTF(2, 0)
2836 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2837 if (Arguments::vfprintf_hook() != NULL) {
2838 return Arguments::vfprintf_hook()(f, fmt, args);
2839 } else {
2840 return vfprintf(f, fmt, args);
2841 }
2842 }
2843
2844 ATTRIBUTE_PRINTF(1, 2)
2845 JNIEXPORT int jio_printf(const char *fmt, ...) {
2846 int len;
2847 va_list args;
2848 va_start(args, fmt);
2849 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2850 va_end(args);
2851 return len;
2852 }
2853
2854
2855 // HotSpot specific jio method
2856 void jio_print(const char* s) {
2857 // Try to make this function as atomic as possible.
2858 if (Arguments::vfprintf_hook() != NULL) {
2859 jio_fprintf(defaultStream::output_stream(), "%s", s);
2860 } else {
2861 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2862 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2863 }
2864 }
2865
2866 } // Extern C
2867
2868 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2869
2870 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2871 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2872 // OSThread objects. The exception to this rule is when the target object is the thread
2873 // doing the operation, in which case we know that the thread won't exit until the
2874 // operation is done (all exits being voluntary). There are a few cases where it is
2875 // rather silly to do operations on yourself, like resuming yourself or asking whether
2876 // you are alive. While these can still happen, they are not subject to deadlocks if
2877 // the lock is held while the operation occurs (this is not the case for suspend, for
2878 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2879 // implementation is local to this file, we always lock Threads_lock for that one.
2880
2881 static void thread_entry(JavaThread* thread, TRAPS) {
2882 HandleMark hm(THREAD);
2883 Handle obj(THREAD, thread->threadObj());
2884 JavaValue result(T_VOID);
2885 JavaCalls::call_virtual(&result,
2886 obj,
2887 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2888 vmSymbols::run_method_name(),
2889 vmSymbols::void_method_signature(),
2890 THREAD);
2891 }
2892
2893
2894 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2895 JVMWrapper("JVM_StartThread");
2896 JavaThread *native_thread = NULL;
2897
2898 // We cannot hold the Threads_lock when we throw an exception,
2899 // due to rank ordering issues. Example: we might need to grab the
2900 // Heap_lock while we construct the exception.
2901 bool throw_illegal_thread_state = false;
2902
2903 // We must release the Threads_lock before we can post a jvmti event
2904 // in Thread::start.
2905 {
2906 // Ensure that the C++ Thread and OSThread structures aren't freed before
2907 // we operate.
2908 MutexLocker mu(Threads_lock);
2909
2910 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2911 // re-starting an already started thread, so we should usually find
2912 // that the JavaThread is null. However for a JNI attached thread
2913 // there is a small window between the Thread object being created
2914 // (with its JavaThread set) and the update to its threadStatus, so we
2915 // have to check for this
2916 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2917 throw_illegal_thread_state = true;
2918 } else {
2919 // We could also check the stillborn flag to see if this thread was already stopped, but
2920 // for historical reasons we let the thread detect that itself when it starts running
2921
2922 jlong size =
2923 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2924 // Allocate the C++ Thread structure and create the native thread. The
2925 // stack size retrieved from java is signed, but the constructor takes
2926 // size_t (an unsigned type), so avoid passing negative values which would
2927 // result in really large stacks.
2928 size_t sz = size > 0 ? (size_t) size : 0;
2929 native_thread = new JavaThread(&thread_entry, sz);
2930
2931 // At this point it may be possible that no osthread was created for the
2932 // JavaThread due to lack of memory. Check for this situation and throw
2933 // an exception if necessary. Eventually we may want to change this so
2934 // that we only grab the lock if the thread was created successfully -
2935 // then we can also do this check and throw the exception in the
2936 // JavaThread constructor.
2937 if (native_thread->osthread() != NULL) {
2938 // Note: the current thread is not being used within "prepare".
2939 native_thread->prepare(jthread);
2940 }
2941 }
2942 }
2943
2944 if (throw_illegal_thread_state) {
2945 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2946 }
2947
2948 assert(native_thread != NULL, "Starting null thread?");
2949
2950 if (native_thread->osthread() == NULL) {
2951 // No one should hold a reference to the 'native_thread'.
2952 delete native_thread;
2953 if (JvmtiExport::should_post_resource_exhausted()) {
2954 JvmtiExport::post_resource_exhausted(
2955 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2956 "unable to create new native thread");
2957 }
2958 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2959 "unable to create new native thread");
2960 }
2961
2962 Thread::start(native_thread);
2963
2964 JVM_END
2965
2966 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2967 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2968 // but is thought to be reliable and simple. In the case, where the receiver is the
2969 // same thread as the sender, no safepoint is needed.
2970 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2971 JVMWrapper("JVM_StopThread");
2972
2973 oop java_throwable = JNIHandles::resolve(throwable);
2974 if (java_throwable == NULL) {
2975 THROW(vmSymbols::java_lang_NullPointerException());
2976 }
2977 oop java_thread = JNIHandles::resolve_non_null(jthread);
2978 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2979 Events::log_exception(JavaThread::current(),
2980 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2981 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2982 // First check if thread is alive
2983 if (receiver != NULL) {
2984 // Check if exception is getting thrown at self (use oop equality, since the
2985 // target object might exit)
2986 if (java_thread == thread->threadObj()) {
2987 THROW_OOP(java_throwable);
2988 } else {
2989 // Enques a VM_Operation to stop all threads and then deliver the exception...
2990 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2991 }
2992 }
2993 else {
2994 // Either:
2995 // - target thread has not been started before being stopped, or
2996 // - target thread already terminated
2997 // We could read the threadStatus to determine which case it is
2998 // but that is overkill as it doesn't matter. We must set the
2999 // stillborn flag for the first case, and if the thread has already
3000 // exited setting this flag has no affect
3001 java_lang_Thread::set_stillborn(java_thread);
3002 }
3003 JVM_END
3004
3005
3006 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3007 JVMWrapper("JVM_IsThreadAlive");
3008
3009 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3010 return java_lang_Thread::is_alive(thread_oop);
3011 JVM_END
3012
3013
3014 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3015 JVMWrapper("JVM_SuspendThread");
3016 oop java_thread = JNIHandles::resolve_non_null(jthread);
3017 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3018
3019 if (receiver != NULL) {
3020 // thread has run and has not exited (still on threads list)
3021
3022 {
3023 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3024 if (receiver->is_external_suspend()) {
3025 // Don't allow nested external suspend requests. We can't return
3026 // an error from this interface so just ignore the problem.
3027 return;
3028 }
3029 if (receiver->is_exiting()) { // thread is in the process of exiting
3030 return;
3031 }
3032 receiver->set_external_suspend();
3033 }
3034
3035 // java_suspend() will catch threads in the process of exiting
3036 // and will ignore them.
3037 receiver->java_suspend();
3038
3039 // It would be nice to have the following assertion in all the
3040 // time, but it is possible for a racing resume request to have
3041 // resumed this thread right after we suspended it. Temporarily
3042 // enable this assertion if you are chasing a different kind of
3043 // bug.
3044 //
3045 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3046 // receiver->is_being_ext_suspended(), "thread is not suspended");
3047 }
3048 JVM_END
3049
3050
3051 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3052 JVMWrapper("JVM_ResumeThread");
3053 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3054 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3055 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3056 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3057 // looks at it.
3058 MutexLocker ml(Threads_lock);
3059 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3060 if (thr != NULL) {
3061 // the thread has run and is not in the process of exiting
3062 thr->java_resume();
3063 }
3064 JVM_END
3065
3066
3067 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3068 JVMWrapper("JVM_SetThreadPriority");
3069 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3070 MutexLocker ml(Threads_lock);
3071 oop java_thread = JNIHandles::resolve_non_null(jthread);
3072 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3073 JavaThread* thr = java_lang_Thread::thread(java_thread);
3074 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3075 Thread::set_priority(thr, (ThreadPriority)prio);
3076 }
3077 JVM_END
3078
3079
3080 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3081 JVMWrapper("JVM_Yield");
3082 if (os::dont_yield()) return;
3083 #ifndef USDT2
3084 HS_DTRACE_PROBE0(hotspot, thread__yield);
3085 #else /* USDT2 */
3086 HOTSPOT_THREAD_YIELD();
3087 #endif /* USDT2 */
3088 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3089 // Critical for similar threading behaviour
3090 if (ConvertYieldToSleep) {
3091 os::sleep(thread, MinSleepInterval, false);
3092 } else {
3093 os::yield();
3094 }
3095 JVM_END
3096
3097
3098 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3099 JVMWrapper("JVM_Sleep");
3100
3101 if (millis < 0) {
3102 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3103 }
3104
3105 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3106 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3107 }
3108
3109 // Save current thread state and restore it at the end of this block.
3110 // And set new thread state to SLEEPING.
3111 JavaThreadSleepState jtss(thread);
3112
3113 #ifndef USDT2
3114 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3115 #else /* USDT2 */
3116 HOTSPOT_THREAD_SLEEP_BEGIN(
3117 millis);
3118 #endif /* USDT2 */
3119
3120 EventThreadSleep event;
3121
3122 if (millis == 0) {
3123 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3124 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3125 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3126 // for SOLARIS
3127 if (ConvertSleepToYield) {
3128 os::yield();
3129 } else {
3130 ThreadState old_state = thread->osthread()->get_state();
3131 thread->osthread()->set_state(SLEEPING);
3132 os::sleep(thread, MinSleepInterval, false);
3133 thread->osthread()->set_state(old_state);
3134 }
3135 } else {
3136 ThreadState old_state = thread->osthread()->get_state();
3137 thread->osthread()->set_state(SLEEPING);
3138 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3139 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3140 // us while we were sleeping. We do not overwrite those.
3141 if (!HAS_PENDING_EXCEPTION) {
3142 if (event.should_commit()) {
3143 event.set_time(millis);
3144 event.commit();
3145 }
3146 #ifndef USDT2
3147 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3148 #else /* USDT2 */
3149 HOTSPOT_THREAD_SLEEP_END(
3150 1);
3151 #endif /* USDT2 */
3152 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3153 // to properly restore the thread state. That's likely wrong.
3154 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3155 }
3156 }
3157 thread->osthread()->set_state(old_state);
3158 }
3159 if (event.should_commit()) {
3160 event.set_time(millis);
3161 event.commit();
3162 }
3163 #ifndef USDT2
3164 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3165 #else /* USDT2 */
3166 HOTSPOT_THREAD_SLEEP_END(
3167 0);
3168 #endif /* USDT2 */
3169 JVM_END
3170
3171 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3172 JVMWrapper("JVM_CurrentThread");
3173 oop jthread = thread->threadObj();
3174 assert (thread != NULL, "no current thread!");
3175 return JNIHandles::make_local(env, jthread);
3176 JVM_END
3177
3178
3179 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3180 JVMWrapper("JVM_CountStackFrames");
3181
3182 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3183 oop java_thread = JNIHandles::resolve_non_null(jthread);
3184 bool throw_illegal_thread_state = false;
3185 int count = 0;
3186
3187 {
3188 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3189 // We need to re-resolve the java_thread, since a GC might have happened during the
3190 // acquire of the lock
3191 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3192
3193 if (thr == NULL) {
3194 // do nothing
3195 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3196 // Check whether this java thread has been suspended already. If not, throws
3197 // IllegalThreadStateException. We defer to throw that exception until
3198 // Threads_lock is released since loading exception class has to leave VM.
3199 // The correct way to test a thread is actually suspended is
3200 // wait_for_ext_suspend_completion(), but we can't call that while holding
3201 // the Threads_lock. The above tests are sufficient for our purposes
3202 // provided the walkability of the stack is stable - which it isn't
3203 // 100% but close enough for most practical purposes.
3204 throw_illegal_thread_state = true;
3205 } else {
3206 // Count all java activation, i.e., number of vframes
3207 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3208 // Native frames are not counted
3209 if (!vfst.method()->is_native()) count++;
3210 }
3211 }
3212 }
3213
3214 if (throw_illegal_thread_state) {
3215 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3216 "this thread is not suspended");
3217 }
3218 return count;
3219 JVM_END
3220
3221 // Consider: A better way to implement JVM_Interrupt() is to acquire
3222 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3223 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3224 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3225 // outside the critical section. Threads_lock is hot so we want to minimize
3226 // the hold-time. A cleaner interface would be to decompose interrupt into
3227 // two steps. The 1st phase, performed under Threads_lock, would return
3228 // a closure that'd be invoked after Threads_lock was dropped.
3229 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3230 // admit spurious wakeups.
3231
3232 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3233 JVMWrapper("JVM_Interrupt");
3234
3235 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3236 oop java_thread = JNIHandles::resolve_non_null(jthread);
3237 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3238 // We need to re-resolve the java_thread, since a GC might have happened during the
3239 // acquire of the lock
3240 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3241 if (thr != NULL) {
3242 Thread::interrupt(thr);
3243 }
3244 JVM_END
3245
3246
3247 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3248 JVMWrapper("JVM_IsInterrupted");
3249
3250 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3251 oop java_thread = JNIHandles::resolve_non_null(jthread);
3252 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3253 // We need to re-resolve the java_thread, since a GC might have happened during the
3254 // acquire of the lock
3255 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3256 if (thr == NULL) {
3257 return JNI_FALSE;
3258 } else {
3259 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3260 }
3261 JVM_END
3262
3263
3264 // Return true iff the current thread has locked the object passed in
3265
3266 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3267 JVMWrapper("JVM_HoldsLock");
3268 assert(THREAD->is_Java_thread(), "sanity check");
3269 if (obj == NULL) {
3270 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3271 }
3272 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3273 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3274 JVM_END
3275
3276
3277 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3278 JVMWrapper("JVM_DumpAllStacks");
3279 VM_PrintThreads op;
3280 VMThread::execute(&op);
3281 if (JvmtiExport::should_post_data_dump()) {
3282 JvmtiExport::post_data_dump();
3283 }
3284 JVM_END
3285
3286 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3287 JVMWrapper("JVM_SetNativeThreadName");
3288 ResourceMark rm(THREAD);
3289 oop java_thread = JNIHandles::resolve_non_null(jthread);
3290 JavaThread* thr = java_lang_Thread::thread(java_thread);
3291 // Thread naming only supported for the current thread, doesn't work for
3292 // target threads.
3293 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3294 // we don't set the name of an attached thread to avoid stepping
3295 // on other programs
3296 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3297 os::set_native_thread_name(thread_name);
3298 }
3299 JVM_END
3300
3301 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3302
3303 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3304 assert(jthread->is_Java_thread(), "must be a Java thread");
3305 if (jthread->privileged_stack_top() == NULL) return false;
3306 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3307 oop loader = jthread->privileged_stack_top()->class_loader();
3308 if (loader == NULL) return true;
3309 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3310 if (trusted) return true;
3311 }
3312 return false;
3313 }
3314
3315 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3316 JVMWrapper("JVM_CurrentLoadedClass");
3317 ResourceMark rm(THREAD);
3318
3319 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3320 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3321 bool trusted = is_trusted_frame(thread, &vfst);
3322 if (trusted) return NULL;
3323
3324 Method* m = vfst.method();
3325 if (!m->is_native()) {
3326 InstanceKlass* holder = m->method_holder();
3327 oop loader = holder->class_loader();
3328 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3329 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3330 }
3331 }
3332 }
3333 return NULL;
3334 JVM_END
3335
3336
3337 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3338 JVMWrapper("JVM_CurrentClassLoader");
3339 ResourceMark rm(THREAD);
3340
3341 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3342
3343 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3344 bool trusted = is_trusted_frame(thread, &vfst);
3345 if (trusted) return NULL;
3346
3347 Method* m = vfst.method();
3348 if (!m->is_native()) {
3349 InstanceKlass* holder = m->method_holder();
3350 assert(holder->is_klass(), "just checking");
3351 oop loader = holder->class_loader();
3352 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3353 return JNIHandles::make_local(env, loader);
3354 }
3355 }
3356 }
3357 return NULL;
3358 JVM_END
3359
3360
3361 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3362 JVMWrapper("JVM_GetClassContext");
3363 ResourceMark rm(THREAD);
3364 JvmtiVMObjectAllocEventCollector oam;
3365 vframeStream vfst(thread);
3366
3367 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3368 // This must only be called from SecurityManager.getClassContext
3369 Method* m = vfst.method();
3370 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3371 m->name() == vmSymbols::getClassContext_name() &&
3372 m->signature() == vmSymbols::void_class_array_signature())) {
3373 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3374 }
3375 }
3376
3377 // Collect method holders
3378 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3379 for (; !vfst.at_end(); vfst.security_next()) {
3380 Method* m = vfst.method();
3381 // Native frames are not returned
3382 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3383 Klass* holder = m->method_holder();
3384 assert(holder->is_klass(), "just checking");
3385 klass_array->append(holder);
3386 }
3387 }
3388
3389 // Create result array of type [Ljava/lang/Class;
3390 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3391 // Fill in mirrors corresponding to method holders
3392 for (int i = 0; i < klass_array->length(); i++) {
3393 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3394 }
3395
3396 return (jobjectArray) JNIHandles::make_local(env, result);
3397 JVM_END
3398
3399
3400 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3401 JVMWrapper("JVM_ClassDepth");
3402 ResourceMark rm(THREAD);
3403 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3404 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3405
3406 const char* str = java_lang_String::as_utf8_string(class_name_str());
3407 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3408 if (class_name_sym == NULL) {
3409 return -1;
3410 }
3411
3412 int depth = 0;
3413
3414 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3415 if (!vfst.method()->is_native()) {
3416 InstanceKlass* holder = vfst.method()->method_holder();
3417 assert(holder->is_klass(), "just checking");
3418 if (holder->name() == class_name_sym) {
3419 return depth;
3420 }
3421 depth++;
3422 }
3423 }
3424 return -1;
3425 JVM_END
3426
3427
3428 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3429 JVMWrapper("JVM_ClassLoaderDepth");
3430 ResourceMark rm(THREAD);
3431 int depth = 0;
3432 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3433 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3434 bool trusted = is_trusted_frame(thread, &vfst);
3435 if (trusted) return -1;
3436
3437 Method* m = vfst.method();
3438 if (!m->is_native()) {
3439 InstanceKlass* holder = m->method_holder();
3440 assert(holder->is_klass(), "just checking");
3441 oop loader = holder->class_loader();
3442 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3443 return depth;
3444 }
3445 depth++;
3446 }
3447 }
3448 return -1;
3449 JVM_END
3450
3451
3452 // java.lang.Package ////////////////////////////////////////////////////////////////
3453
3454
3455 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3456 JVMWrapper("JVM_GetSystemPackage");
3457 ResourceMark rm(THREAD);
3458 JvmtiVMObjectAllocEventCollector oam;
3459 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3460 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3461 return (jstring) JNIHandles::make_local(result);
3462 JVM_END
3463
3464
3465 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3466 JVMWrapper("JVM_GetSystemPackages");
3467 JvmtiVMObjectAllocEventCollector oam;
3468 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3469 return (jobjectArray) JNIHandles::make_local(result);
3470 JVM_END
3471
3472
3473 // ObjectInputStream ///////////////////////////////////////////////////////////////
3474
3475 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3476 if (current_class == NULL) {
3477 return true;
3478 }
3479 if ((current_class == field_class) || access.is_public()) {
3480 return true;
3481 }
3482
3483 if (access.is_protected()) {
3484 // See if current_class is a subclass of field_class
3485 if (current_class->is_subclass_of(field_class)) {
3486 return true;
3487 }
3488 }
3489
3490 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3491 }
3492
3493
3494 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3495 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3496 JVMWrapper("JVM_AllocateNewObject");
3497 JvmtiVMObjectAllocEventCollector oam;
3498 // Receiver is not used
3499 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3500 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3501
3502 // Cannot instantiate primitive types
3503 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3504 ResourceMark rm(THREAD);
3505 THROW_0(vmSymbols::java_lang_InvalidClassException());
3506 }
3507
3508 // Arrays not allowed here, must use JVM_AllocateNewArray
3509 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3510 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3511 ResourceMark rm(THREAD);
3512 THROW_0(vmSymbols::java_lang_InvalidClassException());
3513 }
3514
3515 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3516 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3517
3518 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3519
3520 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3521 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3522
3523 // Make sure klass is initialized, since we are about to instantiate one of them.
3524 curr_klass->initialize(CHECK_NULL);
3525
3526 methodHandle m (THREAD,
3527 init_klass->find_method(vmSymbols::object_initializer_name(),
3528 vmSymbols::void_method_signature()));
3529 if (m.is_null()) {
3530 ResourceMark rm(THREAD);
3531 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3532 Method::name_and_sig_as_C_string(init_klass(),
3533 vmSymbols::object_initializer_name(),
3534 vmSymbols::void_method_signature()));
3535 }
3536
3537 if (curr_klass == init_klass && !m->is_public()) {
3538 // Calling the constructor for class 'curr_klass'.
3539 // Only allow calls to a public no-arg constructor.
3540 // This path corresponds to creating an Externalizable object.
3541 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3542 }
3543
3544 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3545 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3546 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3547 }
3548
3549 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3550 // Call constructor m. This might call a constructor higher up in the hierachy
3551 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3552
3553 return JNIHandles::make_local(obj());
3554 JVM_END
3555
3556
3557 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3558 JVMWrapper("JVM_AllocateNewArray");
3559 JvmtiVMObjectAllocEventCollector oam;
3560 oop mirror = JNIHandles::resolve_non_null(currClass);
3561
3562 if (java_lang_Class::is_primitive(mirror)) {
3563 THROW_0(vmSymbols::java_lang_InvalidClassException());
3564 }
3565 Klass* k = java_lang_Class::as_Klass(mirror);
3566 oop result;
3567
3568 if (k->oop_is_typeArray()) {
3569 // typeArray
3570 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3571 } else if (k->oop_is_objArray()) {
3572 // objArray
3573 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3574 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3575 result = oak->allocate(length, CHECK_NULL);
3576 } else {
3577 THROW_0(vmSymbols::java_lang_InvalidClassException());
3578 }
3579 return JNIHandles::make_local(env, result);
3580 JVM_END
3581
3582
3583 // Return the first non-null class loader up the execution stack, or null
3584 // if only code from the null class loader is on the stack.
3585
3586 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3587 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3588 // UseNewReflection
3589 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3590 oop loader = vfst.method()->method_holder()->class_loader();
3591 if (loader != NULL) {
3592 return JNIHandles::make_local(env, loader);
3593 }
3594 }
3595 return NULL;
3596 JVM_END
3597
3598
3599 // Load a class relative to the most recent class on the stack with a non-null
3600 // classloader.
3601 // This function has been deprecated and should not be considered part of the
3602 // specified JVM interface.
3603
3604 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3605 jclass currClass, jstring currClassName))
3606 JVMWrapper("JVM_LoadClass0");
3607 // Receiver is not used
3608 ResourceMark rm(THREAD);
3609
3610 // Class name argument is not guaranteed to be in internal format
3611 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3612 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3613
3614 const char* str = java_lang_String::as_utf8_string(string());
3615
3616 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3617 // It's impossible to create this class; the name cannot fit
3618 // into the constant pool.
3619 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3620 }
3621
3622 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3623 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3624 // Find the most recent class on the stack with a non-null classloader
3625 oop loader = NULL;
3626 oop protection_domain = NULL;
3627 if (curr_klass.is_null()) {
3628 for (vframeStream vfst(thread);
3629 !vfst.at_end() && loader == NULL;
3630 vfst.next()) {
3631 if (!vfst.method()->is_native()) {
3632 InstanceKlass* holder = vfst.method()->method_holder();
3633 loader = holder->class_loader();
3634 protection_domain = holder->protection_domain();
3635 }
3636 }
3637 } else {
3638 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3639 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3640 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3641 }
3642 Handle h_loader(THREAD, loader);
3643 Handle h_prot (THREAD, protection_domain);
3644 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3645 false, thread);
3646 if (TraceClassResolution && result != NULL) {
3647 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3648 }
3649 return result;
3650 JVM_END
3651
3652
3653 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3654
3655
3656 // resolve array handle and check arguments
3657 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3658 if (arr == NULL) {
3659 THROW_0(vmSymbols::java_lang_NullPointerException());
3660 }
3661 oop a = JNIHandles::resolve_non_null(arr);
3662 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3663 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3664 }
3665 return arrayOop(a);
3666 }
3667
3668
3669 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3670 JVMWrapper("JVM_GetArrayLength");
3671 arrayOop a = check_array(env, arr, false, CHECK_0);
3672 return a->length();
3673 JVM_END
3674
3675
3676 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3677 JVMWrapper("JVM_Array_Get");
3678 JvmtiVMObjectAllocEventCollector oam;
3679 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3680 jvalue value;
3681 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3682 oop box = Reflection::box(&value, type, CHECK_NULL);
3683 return JNIHandles::make_local(env, box);
3684 JVM_END
3685
3686
3687 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3688 JVMWrapper("JVM_GetPrimitiveArrayElement");
3689 jvalue value;
3690 value.i = 0; // to initialize value before getting used in CHECK
3691 arrayOop a = check_array(env, arr, true, CHECK_(value));
3692 assert(a->is_typeArray(), "just checking");
3693 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3694 BasicType wide_type = (BasicType) wCode;
3695 if (type != wide_type) {
3696 Reflection::widen(&value, type, wide_type, CHECK_(value));
3697 }
3698 return value;
3699 JVM_END
3700
3701
3702 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3703 JVMWrapper("JVM_SetArrayElement");
3704 arrayOop a = check_array(env, arr, false, CHECK);
3705 oop box = JNIHandles::resolve(val);
3706 jvalue value;
3707 value.i = 0; // to initialize value before getting used in CHECK
3708 BasicType value_type;
3709 if (a->is_objArray()) {
3710 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3711 value_type = Reflection::unbox_for_regular_object(box, &value);
3712 } else {
3713 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3714 }
3715 Reflection::array_set(&value, a, index, value_type, CHECK);
3716 JVM_END
3717
3718
3719 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3720 JVMWrapper("JVM_SetPrimitiveArrayElement");
3721 arrayOop a = check_array(env, arr, true, CHECK);
3722 assert(a->is_typeArray(), "just checking");
3723 BasicType value_type = (BasicType) vCode;
3724 Reflection::array_set(&v, a, index, value_type, CHECK);
3725 JVM_END
3726
3727
3728 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3729 JVMWrapper("JVM_NewArray");
3730 JvmtiVMObjectAllocEventCollector oam;
3731 oop element_mirror = JNIHandles::resolve(eltClass);
3732 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3733 return JNIHandles::make_local(env, result);
3734 JVM_END
3735
3736
3737 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3738 JVMWrapper("JVM_NewMultiArray");
3739 JvmtiVMObjectAllocEventCollector oam;
3740 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3741 oop element_mirror = JNIHandles::resolve(eltClass);
3742 assert(dim_array->is_typeArray(), "just checking");
3743 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3744 return JNIHandles::make_local(env, result);
3745 JVM_END
3746
3747
3748 // Networking library support ////////////////////////////////////////////////////////////////////
3749
3750 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3751 JVMWrapper("JVM_InitializeSocketLibrary");
3752 return 0;
3753 JVM_END
3754
3755
3756 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3757 JVMWrapper("JVM_Socket");
3758 return os::socket(domain, type, protocol);
3759 JVM_END
3760
3761
3762 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3763 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3764 //%note jvm_r6
3765 return os::socket_close(fd);
3766 JVM_END
3767
3768
3769 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3770 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3771 //%note jvm_r6
3772 return os::socket_shutdown(fd, howto);
3773 JVM_END
3774
3775
3776 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3777 JVMWrapper2("JVM_Recv (0x%x)", fd);
3778 //%note jvm_r6
3779 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3780 JVM_END
3781
3782
3783 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3784 JVMWrapper2("JVM_Send (0x%x)", fd);
3785 //%note jvm_r6
3786 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3787 JVM_END
3788
3789
3790 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3791 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3792 //%note jvm_r6
3793 return os::timeout(fd, timeout);
3794 JVM_END
3795
3796
3797 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3798 JVMWrapper2("JVM_Listen (0x%x)", fd);
3799 //%note jvm_r6
3800 return os::listen(fd, count);
3801 JVM_END
3802
3803
3804 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3805 JVMWrapper2("JVM_Connect (0x%x)", fd);
3806 //%note jvm_r6
3807 return os::connect(fd, him, (socklen_t)len);
3808 JVM_END
3809
3810
3811 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3812 JVMWrapper2("JVM_Bind (0x%x)", fd);
3813 //%note jvm_r6
3814 return os::bind(fd, him, (socklen_t)len);
3815 JVM_END
3816
3817
3818 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3819 JVMWrapper2("JVM_Accept (0x%x)", fd);
3820 //%note jvm_r6
3821 socklen_t socklen = (socklen_t)(*len);
3822 jint result = os::accept(fd, him, &socklen);
3823 *len = (jint)socklen;
3824 return result;
3825 JVM_END
3826
3827
3828 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3829 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3830 //%note jvm_r6
3831 socklen_t socklen = (socklen_t)(*fromlen);
3832 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3833 *fromlen = (int)socklen;
3834 return result;
3835 JVM_END
3836
3837
3838 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3839 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3840 //%note jvm_r6
3841 socklen_t socklen = (socklen_t)(*len);
3842 jint result = os::get_sock_name(fd, him, &socklen);
3843 *len = (int)socklen;
3844 return result;
3845 JVM_END
3846
3847
3848 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3849 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3850 //%note jvm_r6
3851 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3852 JVM_END
3853
3854
3855 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3856 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3857 //%note jvm_r6
3858 return os::socket_available(fd, pbytes);
3859 JVM_END
3860
3861
3862 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3863 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3864 //%note jvm_r6
3865 socklen_t socklen = (socklen_t)(*optlen);
3866 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3867 *optlen = (int)socklen;
3868 return result;
3869 JVM_END
3870
3871
3872 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3873 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3874 //%note jvm_r6
3875 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3876 JVM_END
3877
3878
3879 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3880 JVMWrapper("JVM_GetHostName");
3881 return os::get_host_name(name, namelen);
3882 JVM_END
3883
3884
3885 // Library support ///////////////////////////////////////////////////////////////////////////
3886
3887 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3888 //%note jvm_ct
3889 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3890 char ebuf[1024];
3891 void *load_result;
3892 {
3893 ThreadToNativeFromVM ttnfvm(thread);
3894 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3895 }
3896 if (load_result == NULL) {
3897 char msg[1024];
3898 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3899 // Since 'ebuf' may contain a string encoded using
3900 // platform encoding scheme, we need to pass
3901 // Exceptions::unsafe_to_utf8 to the new_exception method
3902 // as the last argument. See bug 6367357.
3903 Handle h_exception =
3904 Exceptions::new_exception(thread,
3905 vmSymbols::java_lang_UnsatisfiedLinkError(),
3906 msg, Exceptions::unsafe_to_utf8);
3907
3908 THROW_HANDLE_0(h_exception);
3909 }
3910 return load_result;
3911 JVM_END
3912
3913
3914 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3915 JVMWrapper("JVM_UnloadLibrary");
3916 os::dll_unload(handle);
3917 JVM_END
3918
3919
3920 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3921 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3922 return os::dll_lookup(handle, name);
3923 JVM_END
3924
3925
3926 // Floating point support ////////////////////////////////////////////////////////////////////
3927
3928 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3929 JVMWrapper("JVM_IsNaN");
3930 return g_isnan(a);
3931 JVM_END
3932
3933
3934 // JNI version ///////////////////////////////////////////////////////////////////////////////
3935
3936 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3937 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3938 return Threads::is_supported_jni_version_including_1_1(version);
3939 JVM_END
3940
3941
3942 // String support ///////////////////////////////////////////////////////////////////////////
3943
3944 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3945 JVMWrapper("JVM_InternString");
3946 JvmtiVMObjectAllocEventCollector oam;
3947 if (str == NULL) return NULL;
3948 oop string = JNIHandles::resolve_non_null(str);
3949 oop result = StringTable::intern(string, CHECK_NULL);
3950 return (jstring) JNIHandles::make_local(env, result);
3951 JVM_END
3952
3953
3954 // Raw monitor support //////////////////////////////////////////////////////////////////////
3955
3956 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3957 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3958 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3959 // that only works with java threads.
3960
3961
3962 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3963 VM_Exit::block_if_vm_exited();
3964 JVMWrapper("JVM_RawMonitorCreate");
3965 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3966 }
3967
3968
3969 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3970 VM_Exit::block_if_vm_exited();
3971 JVMWrapper("JVM_RawMonitorDestroy");
3972 delete ((Mutex*) mon);
3973 }
3974
3975
3976 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3977 VM_Exit::block_if_vm_exited();
3978 JVMWrapper("JVM_RawMonitorEnter");
3979 ((Mutex*) mon)->jvm_raw_lock();
3980 return 0;
3981 }
3982
3983
3984 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3985 VM_Exit::block_if_vm_exited();
3986 JVMWrapper("JVM_RawMonitorExit");
3987 ((Mutex*) mon)->jvm_raw_unlock();
3988 }
3989
3990
3991 // Support for Serialization
3992
3993 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3994 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3995 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3996 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3997
3998 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3999 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4000 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4001 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4002
4003
4004 void initialize_converter_functions() {
4005 if (JDK_Version::is_gte_jdk14x_version()) {
4006 // These functions only exist for compatibility with 1.3.1 and earlier
4007 return;
4008 }
4009
4010 // called from universe_post_init()
4011 assert(
4012 int_bits_to_float_fn == NULL &&
4013 long_bits_to_double_fn == NULL &&
4014 float_to_int_bits_fn == NULL &&
4015 double_to_long_bits_fn == NULL ,
4016 "initialization done twice"
4017 );
4018 // initialize
4019 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4020 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4021 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4022 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4023 // verify
4024 assert(
4025 int_bits_to_float_fn != NULL &&
4026 long_bits_to_double_fn != NULL &&
4027 float_to_int_bits_fn != NULL &&
4028 double_to_long_bits_fn != NULL ,
4029 "initialization failed"
4030 );
4031 }
4032
4033
4034
4035 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4036
4037 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4038 Handle loader, Handle protection_domain,
4039 jboolean throwError, TRAPS) {
4040 // Security Note:
4041 // The Java level wrapper will perform the necessary security check allowing
4042 // us to pass the NULL as the initiating class loader. The VM is responsible for
4043 // the checkPackageAccess relative to the initiating class loader via the
4044 // protection_domain. The protection_domain is passed as NULL by the java code
4045 // if there is no security manager in 3-arg Class.forName().
4046 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4047
4048 KlassHandle klass_handle(THREAD, klass);
4049 // Check if we should initialize the class
4050 if (init && klass_handle->oop_is_instance()) {
4051 klass_handle->initialize(CHECK_NULL);
4052 }
4053 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4054 }
4055
4056
4057 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4058
4059 #ifndef PRODUCT
4060
4061 extern "C" {
4062 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4063 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4064 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4065 }
4066
4067 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4068 JVMWrapper("JVM_AccessBoolVMFlag");
4069 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4070 JVM_END
4071
4072 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4073 JVMWrapper("JVM_AccessVMIntFlag");
4074 intx v;
4075 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4076 *value = (jint)v;
4077 return result;
4078 JVM_END
4079
4080
4081 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4082 JVMWrapper("JVM_VMBreakPoint");
4083 oop the_obj = JNIHandles::resolve(obj);
4084 BREAKPOINT;
4085 JVM_END
4086
4087
4088 #endif
4089
4090
4091 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4092
4093 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4094 JVMWrapper("JVM_InvokeMethod");
4095 Handle method_handle;
4096 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4097 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4098 Handle receiver(THREAD, JNIHandles::resolve(obj));
4099 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4100 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4101 jobject res = JNIHandles::make_local(env, result);
4102 if (JvmtiExport::should_post_vm_object_alloc()) {
4103 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4104 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4105 if (java_lang_Class::is_primitive(ret_type)) {
4106 // Only for primitive type vm allocates memory for java object.
4107 // See box() method.
4108 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4109 }
4110 }
4111 return res;
4112 } else {
4113 THROW_0(vmSymbols::java_lang_StackOverflowError());
4114 }
4115 JVM_END
4116
4117
4118 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4119 JVMWrapper("JVM_NewInstanceFromConstructor");
4120 oop constructor_mirror = JNIHandles::resolve(c);
4121 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4122 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4123 jobject res = JNIHandles::make_local(env, result);
4124 if (JvmtiExport::should_post_vm_object_alloc()) {
4125 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4126 }
4127 return res;
4128 JVM_END
4129
4130 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4131
4132 JVM_LEAF(jboolean, JVM_SupportsCX8())
4133 JVMWrapper("JVM_SupportsCX8");
4134 return VM_Version::supports_cx8();
4135 JVM_END
4136
4137
4138 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4139 JVMWrapper("JVM_CX8Field");
4140 jlong res;
4141 oop o = JNIHandles::resolve(obj);
4142 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4143 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4144
4145 assert(VM_Version::supports_cx8(), "cx8 not supported");
4146 res = Atomic::cmpxchg(newVal, addr, oldVal);
4147
4148 return res == oldVal;
4149 JVM_END
4150
4151 // DTrace ///////////////////////////////////////////////////////////////////
4152
4153 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4154 JVMWrapper("JVM_DTraceGetVersion");
4155 return (jint)JVM_TRACING_DTRACE_VERSION;
4156 JVM_END
4157
4158 JVM_ENTRY(jlong,JVM_DTraceActivate(
4159 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4160 JVM_DTraceProvider* providers))
4161 JVMWrapper("JVM_DTraceActivate");
4162 return DTraceJSDT::activate(
4163 version, module_name, providers_count, providers, CHECK_0);
4164 JVM_END
4165
4166 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4167 JVMWrapper("JVM_DTraceIsProbeEnabled");
4168 return DTraceJSDT::is_probe_enabled(method);
4169 JVM_END
4170
4171 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4172 JVMWrapper("JVM_DTraceDispose");
4173 DTraceJSDT::dispose(handle);
4174 JVM_END
4175
4176 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4177 JVMWrapper("JVM_DTraceIsSupported");
4178 return DTraceJSDT::is_supported();
4179 JVM_END
4180
4181 // Returns an array of all live Thread objects (VM internal JavaThreads,
4182 // jvmti agent threads, and JNI attaching threads are skipped)
4183 // See CR 6404306 regarding JNI attaching threads
4184 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4185 ResourceMark rm(THREAD);
4186 ThreadsListEnumerator tle(THREAD, false, false);
4187 JvmtiVMObjectAllocEventCollector oam;
4188
4189 int num_threads = tle.num_threads();
4190 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4191 objArrayHandle threads_ah(THREAD, r);
4192
4193 for (int i = 0; i < num_threads; i++) {
4194 Handle h = tle.get_threadObj(i);
4195 threads_ah->obj_at_put(i, h());
4196 }
4197
4198 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4199 JVM_END
4200
4201
4202 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4203 // Return StackTraceElement[][], each element is the stack trace of a thread in
4204 // the corresponding entry in the given threads array
4205 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4206 JVMWrapper("JVM_DumpThreads");
4207 JvmtiVMObjectAllocEventCollector oam;
4208
4209 // Check if threads is null
4210 if (threads == NULL) {
4211 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4212 }
4213
4214 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4215 objArrayHandle ah(THREAD, a);
4216 int num_threads = ah->length();
4217 // check if threads is non-empty array
4218 if (num_threads == 0) {
4219 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4220 }
4221
4222 // check if threads is not an array of objects of Thread class
4223 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4224 if (k != SystemDictionary::Thread_klass()) {
4225 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4226 }
4227
4228 ResourceMark rm(THREAD);
4229
4230 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4231 for (int i = 0; i < num_threads; i++) {
4232 oop thread_obj = ah->obj_at(i);
4233 instanceHandle h(THREAD, (instanceOop) thread_obj);
4234 thread_handle_array->append(h);
4235 }
4236
4237 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4238 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4239
4240 JVM_END
4241
4242 // JVM monitoring and management support
4243 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4244 return Management::get_jmm_interface(version);
4245 JVM_END
4246
4247 // com.sun.tools.attach.VirtualMachine agent properties support
4248 //
4249 // Initialize the agent properties with the properties maintained in the VM
4250 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4251 JVMWrapper("JVM_InitAgentProperties");
4252 ResourceMark rm;
4253
4254 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4255
4256 PUTPROP(props, "sun.java.command", Arguments::java_command());
4257 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4258 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4259 return properties;
4260 JVM_END
4261
4262 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4263 {
4264 JVMWrapper("JVM_GetEnclosingMethodInfo");
4265 JvmtiVMObjectAllocEventCollector oam;
4266
4267 if (ofClass == NULL) {
4268 return NULL;
4269 }
4270 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4271 // Special handling for primitive objects
4272 if (java_lang_Class::is_primitive(mirror())) {
4273 return NULL;
4274 }
4275 Klass* k = java_lang_Class::as_Klass(mirror());
4276 if (!k->oop_is_instance()) {
4277 return NULL;
4278 }
4279 instanceKlassHandle ik_h(THREAD, k);
4280 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4281 if (encl_method_class_idx == 0) {
4282 return NULL;
4283 }
4284 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4285 objArrayHandle dest(THREAD, dest_o);
4286 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4287 dest->obj_at_put(0, enc_k->java_mirror());
4288 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4289 if (encl_method_method_idx != 0) {
4290 Symbol* sym = ik_h->constants()->symbol_at(
4291 extract_low_short_from_int(
4292 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4293 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4294 dest->obj_at_put(1, str());
4295 sym = ik_h->constants()->symbol_at(
4296 extract_high_short_from_int(
4297 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4298 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4299 dest->obj_at_put(2, str());
4300 }
4301 return (jobjectArray) JNIHandles::make_local(dest());
4302 }
4303 JVM_END
4304
4305 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4306 jint javaThreadState))
4307 {
4308 // If new thread states are added in future JDK and VM versions,
4309 // this should check if the JDK version is compatible with thread
4310 // states supported by the VM. Return NULL if not compatible.
4311 //
4312 // This function must map the VM java_lang_Thread::ThreadStatus
4313 // to the Java thread state that the JDK supports.
4314 //
4315
4316 typeArrayHandle values_h;
4317 switch (javaThreadState) {
4318 case JAVA_THREAD_STATE_NEW : {
4319 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4320 values_h = typeArrayHandle(THREAD, r);
4321 values_h->int_at_put(0, java_lang_Thread::NEW);
4322 break;
4323 }
4324 case JAVA_THREAD_STATE_RUNNABLE : {
4325 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4326 values_h = typeArrayHandle(THREAD, r);
4327 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4328 break;
4329 }
4330 case JAVA_THREAD_STATE_BLOCKED : {
4331 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4332 values_h = typeArrayHandle(THREAD, r);
4333 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4334 break;
4335 }
4336 case JAVA_THREAD_STATE_WAITING : {
4337 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4338 values_h = typeArrayHandle(THREAD, r);
4339 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4340 values_h->int_at_put(1, java_lang_Thread::PARKED);
4341 break;
4342 }
4343 case JAVA_THREAD_STATE_TIMED_WAITING : {
4344 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4345 values_h = typeArrayHandle(THREAD, r);
4346 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4347 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4348 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4349 break;
4350 }
4351 case JAVA_THREAD_STATE_TERMINATED : {
4352 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4353 values_h = typeArrayHandle(THREAD, r);
4354 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4355 break;
4356 }
4357 default:
4358 // Unknown state - probably incompatible JDK version
4359 return NULL;
4360 }
4361
4362 return (jintArray) JNIHandles::make_local(env, values_h());
4363 }
4364 JVM_END
4365
4366
4367 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4368 jint javaThreadState,
4369 jintArray values))
4370 {
4371 // If new thread states are added in future JDK and VM versions,
4372 // this should check if the JDK version is compatible with thread
4373 // states supported by the VM. Return NULL if not compatible.
4374 //
4375 // This function must map the VM java_lang_Thread::ThreadStatus
4376 // to the Java thread state that the JDK supports.
4377 //
4378
4379 ResourceMark rm;
4380
4381 // Check if threads is null
4382 if (values == NULL) {
4383 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4384 }
4385
4386 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4387 typeArrayHandle values_h(THREAD, v);
4388
4389 objArrayHandle names_h;
4390 switch (javaThreadState) {
4391 case JAVA_THREAD_STATE_NEW : {
4392 assert(values_h->length() == 1 &&
4393 values_h->int_at(0) == java_lang_Thread::NEW,
4394 "Invalid threadStatus value");
4395
4396 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4397 1, /* only 1 substate */
4398 CHECK_NULL);
4399 names_h = objArrayHandle(THREAD, r);
4400 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4401 names_h->obj_at_put(0, name());
4402 break;
4403 }
4404 case JAVA_THREAD_STATE_RUNNABLE : {
4405 assert(values_h->length() == 1 &&
4406 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4407 "Invalid threadStatus value");
4408
4409 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4410 1, /* only 1 substate */
4411 CHECK_NULL);
4412 names_h = objArrayHandle(THREAD, r);
4413 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4414 names_h->obj_at_put(0, name());
4415 break;
4416 }
4417 case JAVA_THREAD_STATE_BLOCKED : {
4418 assert(values_h->length() == 1 &&
4419 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4420 "Invalid threadStatus value");
4421
4422 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4423 1, /* only 1 substate */
4424 CHECK_NULL);
4425 names_h = objArrayHandle(THREAD, r);
4426 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4427 names_h->obj_at_put(0, name());
4428 break;
4429 }
4430 case JAVA_THREAD_STATE_WAITING : {
4431 assert(values_h->length() == 2 &&
4432 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4433 values_h->int_at(1) == java_lang_Thread::PARKED,
4434 "Invalid threadStatus value");
4435 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4436 2, /* number of substates */
4437 CHECK_NULL);
4438 names_h = objArrayHandle(THREAD, r);
4439 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4440 CHECK_NULL);
4441 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4442 CHECK_NULL);
4443 names_h->obj_at_put(0, name0());
4444 names_h->obj_at_put(1, name1());
4445 break;
4446 }
4447 case JAVA_THREAD_STATE_TIMED_WAITING : {
4448 assert(values_h->length() == 3 &&
4449 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4450 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4451 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4452 "Invalid threadStatus value");
4453 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4454 3, /* number of substates */
4455 CHECK_NULL);
4456 names_h = objArrayHandle(THREAD, r);
4457 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4458 CHECK_NULL);
4459 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4460 CHECK_NULL);
4461 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4462 CHECK_NULL);
4463 names_h->obj_at_put(0, name0());
4464 names_h->obj_at_put(1, name1());
4465 names_h->obj_at_put(2, name2());
4466 break;
4467 }
4468 case JAVA_THREAD_STATE_TERMINATED : {
4469 assert(values_h->length() == 1 &&
4470 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4471 "Invalid threadStatus value");
4472 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4473 1, /* only 1 substate */
4474 CHECK_NULL);
4475 names_h = objArrayHandle(THREAD, r);
4476 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4477 names_h->obj_at_put(0, name());
4478 break;
4479 }
4480 default:
4481 // Unknown state - probably incompatible JDK version
4482 return NULL;
4483 }
4484 return (jobjectArray) JNIHandles::make_local(env, names_h());
4485 }
4486 JVM_END
4487
4488 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4489 {
4490 memset(info, 0, sizeof(info_size));
4491
4492 info->jvm_version = Abstract_VM_Version::jvm_version();
4493 info->update_version = 0; /* 0 in HotSpot Express VM */
4494 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4495
4496 // when we add a new capability in the jvm_version_info struct, we should also
4497 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4498 // counter defined in runtimeService.cpp.
4499 info->is_attachable = AttachListener::is_attach_supported();
4500 }
4501 JVM_END