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