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