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