1 /*
2 * Copyright (c) 1997, 2011, 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 "memory/oopFactory.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/fieldStreams.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayKlass.hpp"
38 #include "prims/jvm.h"
39 #include "prims/jvm_misc.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "prims/jvmtiThreadState.hpp"
42 #include "prims/nativeLookup.hpp"
43 #include "prims/privilegedStack.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/dtraceJSDT.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/init.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/jfieldIDWorkaround.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/perfData.hpp"
54 #include "runtime/reflection.hpp"
55 #include "runtime/vframe.hpp"
56 #include "runtime/vm_operations.hpp"
57 #include "services/attachListener.hpp"
58 #include "services/management.hpp"
59 #include "services/threadService.hpp"
60 #include "utilities/copy.hpp"
61 #include "utilities/defaultStream.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/histogram.hpp"
65 #include "utilities/top.hpp"
66 #include "utilities/utf8.hpp"
67 #ifdef TARGET_OS_FAMILY_linux
68 # include "jvm_linux.h"
69 #endif
70 #ifdef TARGET_OS_FAMILY_solaris
71 # include "jvm_solaris.h"
72 #endif
73 #ifdef TARGET_OS_FAMILY_windows
74 # include "jvm_windows.h"
75 #endif
76
77 #include <errno.h>
78
79 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
80 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
81 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
82
83 /*
84 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
85 such ctors and calls MUST NOT come between an oop declaration/init and its
86 usage because if objects are move this may cause various memory stomps, bus
87 errors and segfaults. Here is a cookbook for causing so called "naked oop
88 failures":
89
90 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
91 JVMWrapper("JVM_GetClassDeclaredFields");
92
93 // Object address to be held directly in mirror & not visible to GC
94 oop mirror = JNIHandles::resolve_non_null(ofClass);
95
96 // If this ctor can hit a safepoint, moving objects around, then
97 ComplexConstructor foo;
98
99 // Boom! mirror may point to JUNK instead of the intended object
100 (some dereference of mirror)
101
102 // Here's another call that may block for GC, making mirror stale
103 MutexLocker ml(some_lock);
104
105 // And here's an initializer that can result in a stale oop
106 // all in one step.
107 oop o = call_that_can_throw_exception(TRAPS);
108
109
110 The solution is to keep the oop declaration BELOW the ctor or function
111 call that might cause a GC, do another resolve to reassign the oop, or
112 consider use of a Handle instead of an oop so there is immunity from object
113 motion. But note that the "QUICK" entries below do not have a handlemark
114 and thus can only support use of handles passed in.
115 */
116
117 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
118 ResourceMark rm;
119 int line_number = -1;
120 const char * source_file = NULL;
121 const char * trace = "explicit";
122 klassOop caller = NULL;
123 JavaThread* jthread = JavaThread::current();
124 if (jthread->has_last_Java_frame()) {
125 vframeStream vfst(jthread);
126
127 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
128 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
129 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
130 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
131 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
132
133 methodOop last_caller = NULL;
134
135 while (!vfst.at_end()) {
136 methodOop m = vfst.method();
137 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
138 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
139 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
140 break;
141 }
142 last_caller = m;
143 vfst.next();
144 }
145 // if this is called from Class.forName0 and that is called from Class.forName,
146 // then print the caller of Class.forName. If this is Class.loadClass, then print
147 // that caller, otherwise keep quiet since this should be picked up elsewhere.
148 bool found_it = false;
149 if (!vfst.at_end() &&
150 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
151 vfst.method()->name() == vmSymbols::forName0_name()) {
152 vfst.next();
153 if (!vfst.at_end() &&
154 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
155 vfst.method()->name() == vmSymbols::forName_name()) {
156 vfst.next();
157 found_it = true;
158 }
159 } else if (last_caller != NULL &&
160 instanceKlass::cast(last_caller->method_holder())->name() ==
161 vmSymbols::java_lang_ClassLoader() &&
162 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
163 last_caller->name() == vmSymbols::loadClass_name())) {
164 found_it = true;
165 } else if (!vfst.at_end()) {
166 if (vfst.method()->is_native()) {
167 // JNI call
168 found_it = true;
169 }
170 }
171 if (found_it && !vfst.at_end()) {
172 // found the caller
173 caller = vfst.method()->method_holder();
174 line_number = vfst.method()->line_number_from_bci(vfst.bci());
175 if (line_number == -1) {
176 // show method name if it's a native method
177 trace = vfst.method()->name_and_sig_as_C_string();
178 }
179 Symbol* s = instanceKlass::cast(caller)->source_file_name();
180 if (s != NULL) {
181 source_file = s->as_C_string();
182 }
183 }
184 }
185 if (caller != NULL) {
186 if (to_class != caller) {
187 const char * from = Klass::cast(caller)->external_name();
188 const char * to = Klass::cast(to_class)->external_name();
189 // print in a single call to reduce interleaving between threads
190 if (source_file != NULL) {
191 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
192 } else {
193 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
194 }
195 }
196 }
197 }
198
199 void trace_class_resolution(klassOop to_class) {
200 EXCEPTION_MARK;
201 trace_class_resolution_impl(to_class, THREAD);
202 if (HAS_PENDING_EXCEPTION) {
203 CLEAR_PENDING_EXCEPTION;
204 }
205 }
206
207 // Wrapper to trace JVM functions
208
209 #ifdef ASSERT
210 class JVMTraceWrapper : public StackObj {
211 public:
212 JVMTraceWrapper(const char* format, ...) {
213 if (TraceJVMCalls) {
214 va_list ap;
215 va_start(ap, format);
216 tty->print("JVM ");
217 tty->vprint_cr(format, ap);
218 va_end(ap);
219 }
220 }
221 };
222
223 Histogram* JVMHistogram;
224 volatile jint JVMHistogram_lock = 0;
225
226 class JVMHistogramElement : public HistogramElement {
227 public:
228 JVMHistogramElement(const char* name);
229 };
230
231 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
232 _name = elementName;
233 uintx count = 0;
234
235 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
236 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
237 count +=1;
238 if ( (WarnOnStalledSpinLock > 0)
239 && (count % WarnOnStalledSpinLock == 0)) {
240 warning("JVMHistogram_lock seems to be stalled");
241 }
242 }
243 }
244
245 if(JVMHistogram == NULL)
246 JVMHistogram = new Histogram("JVM Call Counts",100);
247
248 JVMHistogram->add_element(this);
249 Atomic::dec(&JVMHistogram_lock);
250 }
251
252 #define JVMCountWrapper(arg) \
253 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
254 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
255
256 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
257 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
258 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
259 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
260 #else
261 #define JVMWrapper(arg1)
262 #define JVMWrapper2(arg1, arg2)
263 #define JVMWrapper3(arg1, arg2, arg3)
264 #define JVMWrapper4(arg1, arg2, arg3, arg4)
265 #endif
266
267
268 // Interface version /////////////////////////////////////////////////////////////////////
269
270
271 JVM_LEAF(jint, JVM_GetInterfaceVersion())
272 return JVM_INTERFACE_VERSION;
273 JVM_END
274
275
276 // java.lang.System //////////////////////////////////////////////////////////////////////
277
278
279 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
280 JVMWrapper("JVM_CurrentTimeMillis");
281 return os::javaTimeMillis();
282 JVM_END
283
284 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
285 JVMWrapper("JVM_NanoTime");
286 return os::javaTimeNanos();
287 JVM_END
288
289
290 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
291 jobject dst, jint dst_pos, jint length))
292 JVMWrapper("JVM_ArrayCopy");
293 // Check if we have null pointers
294 if (src == NULL || dst == NULL) {
295 THROW(vmSymbols::java_lang_NullPointerException());
296 }
297 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
298 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
299 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
300 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
301 // Do copy
302 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
303 JVM_END
304
305
306 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
307 JavaValue r(T_OBJECT);
308 // public synchronized Object put(Object key, Object value);
309 HandleMark hm(THREAD);
310 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
311 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
312 JavaCalls::call_virtual(&r,
313 props,
314 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
315 vmSymbols::put_name(),
316 vmSymbols::object_object_object_signature(),
317 key_str,
318 value_str,
319 THREAD);
320 }
321
322
323 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
324
325
326 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
327 JVMWrapper("JVM_InitProperties");
328 ResourceMark rm;
329
330 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
331
332 // System property list includes both user set via -D option and
333 // jvm system specific properties.
334 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
335 PUTPROP(props, p->key(), p->value());
336 }
337
338 // Convert the -XX:MaxDirectMemorySize= command line flag
339 // to the sun.nio.MaxDirectMemorySize property.
340 // Do this after setting user properties to prevent people
341 // from setting the value with a -D option, as requested.
342 {
343 char as_chars[256];
344 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
345 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
346 }
347
348 // JVM monitoring and management support
349 // Add the sun.management.compiler property for the compiler's name
350 {
351 #undef CSIZE
352 #if defined(_LP64) || defined(_WIN64)
353 #define CSIZE "64-Bit "
354 #else
355 #define CSIZE
356 #endif // 64bit
357
358 #ifdef TIERED
359 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
360 #else
361 #if defined(COMPILER1)
362 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
363 #elif defined(COMPILER2)
364 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
365 #else
366 const char* compiler_name = "";
367 #endif // compilers
368 #endif // TIERED
369
370 if (*compiler_name != '\0' &&
371 (Arguments::mode() != Arguments::_int)) {
372 PUTPROP(props, "sun.management.compiler", compiler_name);
373 }
374 }
375
376 return properties;
377 JVM_END
378
379
380 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
381
382 extern volatile jint vm_created;
383
384 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
385 if (vm_created != 0 && (code == 0)) {
386 // The VM is about to exit. We call back into Java to check whether finalizers should be run
387 Universe::run_finalizers_on_exit();
388 }
389 before_exit(thread);
390 vm_exit(code);
391 JVM_END
392
393
394 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
395 before_exit(thread);
396 vm_exit(code);
397 JVM_END
398
399
400 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
401 register_on_exit_function(func);
402 JVM_END
403
404
405 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
406 JVMWrapper("JVM_GC");
407 if (!DisableExplicitGC) {
408 Universe::heap()->collect(GCCause::_java_lang_system_gc);
409 }
410 JVM_END
411
412
413 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
414 JVMWrapper("JVM_MaxObjectInspectionAge");
415 return Universe::heap()->millis_since_last_gc();
416 JVM_END
417
418
419 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
420 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
421 JVM_END
422
423
424 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
425 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
426 JVM_END
427
428 static inline jlong convert_size_t_to_jlong(size_t val) {
429 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
430 NOT_LP64 (return (jlong)val;)
431 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
432 }
433
434 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
435 JVMWrapper("JVM_TotalMemory");
436 size_t n = Universe::heap()->capacity();
437 return convert_size_t_to_jlong(n);
438 JVM_END
439
440
441 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
442 JVMWrapper("JVM_FreeMemory");
443 CollectedHeap* ch = Universe::heap();
444 size_t n;
445 {
446 MutexLocker x(Heap_lock);
447 n = ch->capacity() - ch->used();
448 }
449 return convert_size_t_to_jlong(n);
450 JVM_END
451
452
453 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
454 JVMWrapper("JVM_MaxMemory");
455 size_t n = Universe::heap()->max_capacity();
456 return convert_size_t_to_jlong(n);
457 JVM_END
458
459
460 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
461 JVMWrapper("JVM_ActiveProcessorCount");
462 return os::active_processor_count();
463 JVM_END
464
465
466
467 // java.lang.Throwable //////////////////////////////////////////////////////
468
469
470 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
471 JVMWrapper("JVM_FillInStackTrace");
472 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
473 java_lang_Throwable::fill_in_stack_trace(exception);
474 JVM_END
475
476
477 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
478 JVMWrapper("JVM_PrintStackTrace");
479 // Note: This is no longer used in Merlin, but we still support it for compatibility.
480 oop exception = JNIHandles::resolve_non_null(receiver);
481 oop stream = JNIHandles::resolve_non_null(printable);
482 java_lang_Throwable::print_stack_trace(exception, stream);
483 JVM_END
484
485
486 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
487 JVMWrapper("JVM_GetStackTraceDepth");
488 oop exception = JNIHandles::resolve(throwable);
489 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
490 JVM_END
491
492
493 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
494 JVMWrapper("JVM_GetStackTraceElement");
495 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
496 oop exception = JNIHandles::resolve(throwable);
497 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
498 return JNIHandles::make_local(env, element);
499 JVM_END
500
501
502 // java.lang.Object ///////////////////////////////////////////////
503
504
505 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
506 JVMWrapper("JVM_IHashCode");
507 // as implemented in the classic virtual machine; return 0 if object is NULL
508 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
509 JVM_END
510
511
512 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
513 JVMWrapper("JVM_MonitorWait");
514 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
515 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
516 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
517 if (JvmtiExport::should_post_monitor_wait()) {
518 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
519 }
520 ObjectSynchronizer::wait(obj, ms, CHECK);
521 JVM_END
522
523
524 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
525 JVMWrapper("JVM_MonitorNotify");
526 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
527 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
528 ObjectSynchronizer::notify(obj, CHECK);
529 JVM_END
530
531
532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
533 JVMWrapper("JVM_MonitorNotifyAll");
534 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
535 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
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_javaArray()) {
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_javaArray()) {
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 klassOop k = thread->security_get_caller_class(depth);
671 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
672 JVM_END
673
674
675 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
676 JVMWrapper("JVM_FindPrimitiveClass");
677 oop mirror = NULL;
678 BasicType t = name2type(utf);
679 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
680 mirror = Universe::java_mirror(t);
681 }
682 if (mirror == NULL) {
683 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
684 } else {
685 return (jclass) JNIHandles::make_local(env, mirror);
686 }
687 JVM_END
688
689
690 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
691 JVMWrapper("JVM_ResolveClass");
692 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
693 JVM_END
694
695
696 // Returns a class loaded by the bootstrap class loader; or null
697 // if not found. ClassNotFoundException is not thrown.
698 //
699 // Rationale behind JVM_FindClassFromBootLoader
700 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
701 // b> because of (a) java.dll has a direct dependecy on the unexported
702 // private symbol "_JVM_FindClassFromClassLoader@20".
703 // c> the launcher cannot use the private symbol as it dynamically opens
704 // the entry point, so if something changes, the launcher will fail
705 // unexpectedly at runtime, it is safest for the launcher to dlopen a
706 // stable exported interface.
707 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
708 // signature to change from _JVM_FindClassFromClassLoader@20 to
709 // JVM_FindClassFromClassLoader and will not be backward compatible
710 // with older JDKs.
711 // Thus a public/stable exported entry point is the right solution,
712 // public here means public in linker semantics, and is exported only
713 // to the JDK, and is not intended to be a public API.
714
715 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
716 const char* name))
717 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
718
719 // Java libraries should ensure that name is never null...
720 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
721 // It's impossible to create this class; the name cannot fit
722 // into the constant pool.
723 return NULL;
724 }
725
726 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
727 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
728 if (k == NULL) {
729 return NULL;
730 }
731
732 if (TraceClassResolution) {
733 trace_class_resolution(k);
734 }
735 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
736 JVM_END
737
738 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
739 jboolean init, jobject loader,
740 jboolean throwError))
741 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
742 throwError ? "error" : "exception");
743 // Java libraries should ensure that name is never null...
744 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
745 // It's impossible to create this class; the name cannot fit
746 // into the constant pool.
747 if (throwError) {
748 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
749 } else {
750 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
751 }
752 }
753 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
754 Handle h_loader(THREAD, JNIHandles::resolve(loader));
755 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
756 Handle(), throwError, THREAD);
757
758 if (TraceClassResolution && result != NULL) {
759 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
760 }
761 return result;
762 JVM_END
763
764
765 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
766 jboolean init, jclass from))
767 JVMWrapper2("JVM_FindClassFromClass %s", name);
768 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
769 // It's impossible to create this class; the name cannot fit
770 // into the constant pool.
771 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
772 }
773 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
774 oop from_class_oop = JNIHandles::resolve(from);
775 klassOop from_class = (from_class_oop == NULL)
776 ? (klassOop)NULL
777 : java_lang_Class::as_klassOop(from_class_oop);
778 oop class_loader = NULL;
779 oop protection_domain = NULL;
780 if (from_class != NULL) {
781 class_loader = Klass::cast(from_class)->class_loader();
782 protection_domain = Klass::cast(from_class)->protection_domain();
783 }
784 Handle h_loader(THREAD, class_loader);
785 Handle h_prot (THREAD, protection_domain);
786 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
787 h_prot, true, thread);
788
789 if (TraceClassResolution && result != NULL) {
790 // this function is generally only used for class loading during verification.
791 ResourceMark rm;
792 oop from_mirror = JNIHandles::resolve_non_null(from);
793 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
794 const char * from_name = Klass::cast(from_class)->external_name();
795
796 oop mirror = JNIHandles::resolve_non_null(result);
797 klassOop to_class = java_lang_Class::as_klassOop(mirror);
798 const char * to = Klass::cast(to_class)->external_name();
799 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
800 }
801
802 return result;
803 JVM_END
804
805 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
806 if (loader.is_null()) {
807 return;
808 }
809
810 // check whether the current caller thread holds the lock or not.
811 // If not, increment the corresponding counter
812 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
813 ObjectSynchronizer::owner_self) {
814 counter->inc();
815 }
816 }
817
818 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
819 // and JVM_DefineClassWithSourceCond()
820 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
821 jobject loader, const jbyte *buf,
822 jsize len, jobject pd, const char *source,
823 jboolean verify, TRAPS) {
824 if (source == NULL) source = "__JVM_DefineClass__";
825
826 assert(THREAD->is_Java_thread(), "must be a JavaThread");
827 JavaThread* jt = (JavaThread*) THREAD;
828
829 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
830 ClassLoader::perf_define_appclass_selftime(),
831 ClassLoader::perf_define_appclasses(),
832 jt->get_thread_stat()->perf_recursion_counts_addr(),
833 jt->get_thread_stat()->perf_timers_addr(),
834 PerfClassTraceTime::DEFINE_CLASS);
835
836 if (UsePerfData) {
837 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
838 }
839
840 // Since exceptions can be thrown, class initialization can take place
841 // if name is NULL no check for class name in .class stream has to be made.
842 TempNewSymbol class_name = NULL;
843 if (name != NULL) {
844 const int str_len = (int)strlen(name);
845 if (str_len > Symbol::max_length()) {
846 // It's impossible to create this class; the name cannot fit
847 // into the constant pool.
848 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
849 }
850 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
851 }
852
853 ResourceMark rm(THREAD);
854 ClassFileStream st((u1*) buf, len, (char *)source);
855 Handle class_loader (THREAD, JNIHandles::resolve(loader));
856 if (UsePerfData) {
857 is_lock_held_by_thread(class_loader,
858 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
859 THREAD);
860 }
861 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
862 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
863 protection_domain, &st,
864 verify != 0,
865 CHECK_NULL);
866
867 if (TraceClassResolution && k != NULL) {
868 trace_class_resolution(k);
869 }
870
871 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
872 }
873
874
875 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
876 JVMWrapper2("JVM_DefineClass %s", name);
877
878 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
879 JVM_END
880
881
882 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
883 JVMWrapper2("JVM_DefineClassWithSource %s", name);
884
885 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
886 JVM_END
887
888 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
889 jobject loader, const jbyte *buf,
890 jsize len, jobject pd,
891 const char *source, jboolean verify))
892 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
893
894 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
895 JVM_END
896
897 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
898 JVMWrapper("JVM_FindLoadedClass");
899 ResourceMark rm(THREAD);
900
901 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
902 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
903
904 const char* str = java_lang_String::as_utf8_string(string());
905 // Sanity check, don't expect null
906 if (str == NULL) return NULL;
907
908 const int str_len = (int)strlen(str);
909 if (str_len > Symbol::max_length()) {
910 // It's impossible to create this class; the name cannot fit
911 // into the constant pool.
912 return NULL;
913 }
914 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
915
916 // Security Note:
917 // The Java level wrapper will perform the necessary security check allowing
918 // us to pass the NULL as the initiating class loader.
919 Handle h_loader(THREAD, JNIHandles::resolve(loader));
920 if (UsePerfData) {
921 is_lock_held_by_thread(h_loader,
922 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
923 THREAD);
924 }
925
926 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
927 h_loader,
928 Handle(),
929 CHECK_NULL);
930
931 return (k == NULL) ? NULL :
932 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
933 JVM_END
934
935
936 // Reflection support //////////////////////////////////////////////////////////////////////////////
937
938 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
939 assert (cls != NULL, "illegal class");
940 JVMWrapper("JVM_GetClassName");
941 JvmtiVMObjectAllocEventCollector oam;
942 ResourceMark rm(THREAD);
943 const char* name;
944 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
945 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
946 } else {
947 // Consider caching interned string in Klass
948 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
949 assert(k->is_klass(), "just checking");
950 name = Klass::cast(k)->external_name();
951 }
952 oop result = StringTable::intern((char*) name, CHECK_NULL);
953 return (jstring) JNIHandles::make_local(env, result);
954 JVM_END
955
956
957 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
958 JVMWrapper("JVM_GetClassInterfaces");
959 JvmtiVMObjectAllocEventCollector oam;
960 oop mirror = JNIHandles::resolve_non_null(cls);
961
962 // Special handling for primitive objects
963 if (java_lang_Class::is_primitive(mirror)) {
964 // Primitive objects does not have any interfaces
965 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
966 return (jobjectArray) JNIHandles::make_local(env, r);
967 }
968
969 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
970 // Figure size of result array
971 int size;
972 if (klass->oop_is_instance()) {
973 size = instanceKlass::cast(klass())->local_interfaces()->length();
974 } else {
975 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
976 size = 2;
977 }
978
979 // Allocate result array
980 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
981 objArrayHandle result (THREAD, r);
982 // Fill in result
983 if (klass->oop_is_instance()) {
984 // Regular instance klass, fill in all local interfaces
985 for (int index = 0; index < size; index++) {
986 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
987 result->obj_at_put(index, Klass::cast(k)->java_mirror());
988 }
989 } else {
990 // All arrays implement java.lang.Cloneable and java.io.Serializable
991 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
992 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
993 }
994 return (jobjectArray) JNIHandles::make_local(env, result());
995 JVM_END
996
997
998 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
999 JVMWrapper("JVM_GetClassLoader");
1000 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1001 return NULL;
1002 }
1003 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1004 oop loader = Klass::cast(k)->class_loader();
1005 return JNIHandles::make_local(env, loader);
1006 JVM_END
1007
1008
1009 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1010 JVMWrapper("JVM_IsInterface");
1011 oop mirror = JNIHandles::resolve_non_null(cls);
1012 if (java_lang_Class::is_primitive(mirror)) {
1013 return JNI_FALSE;
1014 }
1015 klassOop k = java_lang_Class::as_klassOop(mirror);
1016 jboolean result = Klass::cast(k)->is_interface();
1017 assert(!result || Klass::cast(k)->oop_is_instance(),
1018 "all interfaces are instance types");
1019 // The compiler intrinsic for isInterface tests the
1020 // Klass::_access_flags bits in the same way.
1021 return result;
1022 JVM_END
1023
1024
1025 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1026 JVMWrapper("JVM_GetClassSigners");
1027 JvmtiVMObjectAllocEventCollector oam;
1028 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1029 // There are no signers for primitive types
1030 return NULL;
1031 }
1032
1033 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1034 objArrayOop signers = NULL;
1035 if (Klass::cast(k)->oop_is_instance()) {
1036 signers = instanceKlass::cast(k)->signers();
1037 }
1038
1039 // If there are no signers set in the class, or if the class
1040 // is an array, return NULL.
1041 if (signers == NULL) return NULL;
1042
1043 // copy of the signers array
1044 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1045 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1046 for (int index = 0; index < signers->length(); index++) {
1047 signers_copy->obj_at_put(index, signers->obj_at(index));
1048 }
1049
1050 // return the copy
1051 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1052 JVM_END
1053
1054
1055 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1056 JVMWrapper("JVM_SetClassSigners");
1057 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1058 // This call is ignored for primitive types and arrays.
1059 // Signers are only set once, ClassLoader.java, and thus shouldn't
1060 // be called with an array. Only the bootstrap loader creates arrays.
1061 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1062 if (Klass::cast(k)->oop_is_instance()) {
1063 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1064 }
1065 }
1066 JVM_END
1067
1068
1069 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1070 JVMWrapper("JVM_GetProtectionDomain");
1071 if (JNIHandles::resolve(cls) == NULL) {
1072 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1073 }
1074
1075 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1076 // Primitive types does not have a protection domain.
1077 return NULL;
1078 }
1079
1080 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1081 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1082 JVM_END
1083
1084
1085 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1086 // still defined in core libraries as of 1.5.
1087 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1088 JVMWrapper("JVM_SetProtectionDomain");
1089 if (JNIHandles::resolve(cls) == NULL) {
1090 THROW(vmSymbols::java_lang_NullPointerException());
1091 }
1092 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1093 // Call is ignored for primitive types
1094 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1095
1096 // cls won't be an array, as this called only from ClassLoader.defineClass
1097 if (Klass::cast(k)->oop_is_instance()) {
1098 oop pd = JNIHandles::resolve(protection_domain);
1099 assert(pd == NULL || pd->is_oop(), "just checking");
1100 instanceKlass::cast(k)->set_protection_domain(pd);
1101 }
1102 }
1103 JVM_END
1104
1105
1106 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1107 JVMWrapper("JVM_DoPrivileged");
1108
1109 if (action == NULL) {
1110 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1111 }
1112
1113 // Stack allocated list of privileged stack elements
1114 PrivilegedElement pi;
1115
1116 // Check that action object understands "Object run()"
1117 Handle object (THREAD, JNIHandles::resolve(action));
1118
1119 // get run() method
1120 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1121 vmSymbols::run_method_name(),
1122 vmSymbols::void_object_signature());
1123 methodHandle m (THREAD, m_oop);
1124 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1125 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1126 }
1127
1128 // Compute the frame initiating the do privileged operation and setup the privileged stack
1129 vframeStream vfst(thread);
1130 vfst.security_get_caller_frame(1);
1131
1132 if (!vfst.at_end()) {
1133 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1134 thread->set_privileged_stack_top(&pi);
1135 }
1136
1137
1138 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1139 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1140 Handle pending_exception;
1141 JavaValue result(T_OBJECT);
1142 JavaCallArguments args(object);
1143 JavaCalls::call(&result, m, &args, THREAD);
1144
1145 // done with action, remove ourselves from the list
1146 if (!vfst.at_end()) {
1147 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1148 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1149 }
1150
1151 if (HAS_PENDING_EXCEPTION) {
1152 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1153 CLEAR_PENDING_EXCEPTION;
1154
1155 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1156 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1157 // Throw a java.security.PrivilegedActionException(Exception e) exception
1158 JavaCallArguments args(pending_exception);
1159 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1160 vmSymbols::exception_void_signature(),
1161 &args);
1162 }
1163 }
1164
1165 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1166 return JNIHandles::make_local(env, (oop) result.get_jobject());
1167 JVM_END
1168
1169
1170 // Returns the inherited_access_control_context field of the running thread.
1171 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1172 JVMWrapper("JVM_GetInheritedAccessControlContext");
1173 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1174 return JNIHandles::make_local(env, result);
1175 JVM_END
1176
1177 class RegisterArrayForGC {
1178 private:
1179 JavaThread *_thread;
1180 public:
1181 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1182 _thread = thread;
1183 _thread->register_array_for_gc(array);
1184 }
1185
1186 ~RegisterArrayForGC() {
1187 _thread->register_array_for_gc(NULL);
1188 }
1189 };
1190
1191
1192 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1193 JVMWrapper("JVM_GetStackAccessControlContext");
1194 if (!UsePrivilegedStack) return NULL;
1195
1196 ResourceMark rm(THREAD);
1197 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1198 JvmtiVMObjectAllocEventCollector oam;
1199
1200 // count the protection domains on the execution stack. We collapse
1201 // duplicate consecutive protection domains into a single one, as
1202 // well as stopping when we hit a privileged frame.
1203
1204 // Use vframeStream to iterate through Java frames
1205 vframeStream vfst(thread);
1206
1207 oop previous_protection_domain = NULL;
1208 Handle privileged_context(thread, NULL);
1209 bool is_privileged = false;
1210 oop protection_domain = NULL;
1211
1212 for(; !vfst.at_end(); vfst.next()) {
1213 // get method of frame
1214 methodOop method = vfst.method();
1215 intptr_t* frame_id = vfst.frame_id();
1216
1217 // check the privileged frames to see if we have a match
1218 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1219 // this frame is privileged
1220 is_privileged = true;
1221 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1222 protection_domain = thread->privileged_stack_top()->protection_domain();
1223 } else {
1224 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1225 }
1226
1227 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1228 local_array->push(protection_domain);
1229 previous_protection_domain = protection_domain;
1230 }
1231
1232 if (is_privileged) break;
1233 }
1234
1235
1236 // either all the domains on the stack were system domains, or
1237 // we had a privileged system domain
1238 if (local_array->is_empty()) {
1239 if (is_privileged && privileged_context.is_null()) return NULL;
1240
1241 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1242 return JNIHandles::make_local(env, result);
1243 }
1244
1245 // the resource area must be registered in case of a gc
1246 RegisterArrayForGC ragc(thread, local_array);
1247 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1248 local_array->length(), CHECK_NULL);
1249 objArrayHandle h_context(thread, context);
1250 for (int index = 0; index < local_array->length(); index++) {
1251 h_context->obj_at_put(index, local_array->at(index));
1252 }
1253
1254 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1255
1256 return JNIHandles::make_local(env, result);
1257 JVM_END
1258
1259
1260 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1261 JVMWrapper("JVM_IsArrayClass");
1262 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1263 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1264 JVM_END
1265
1266
1267 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1268 JVMWrapper("JVM_IsPrimitiveClass");
1269 oop mirror = JNIHandles::resolve_non_null(cls);
1270 return (jboolean) java_lang_Class::is_primitive(mirror);
1271 JVM_END
1272
1273
1274 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1275 JVMWrapper("JVM_GetComponentType");
1276 oop mirror = JNIHandles::resolve_non_null(cls);
1277 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1278 return (jclass) JNIHandles::make_local(env, result);
1279 JVM_END
1280
1281
1282 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1283 JVMWrapper("JVM_GetClassModifiers");
1284 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1285 // Primitive type
1286 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1287 }
1288
1289 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1290 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1291 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1292 return k->modifier_flags();
1293 JVM_END
1294
1295
1296 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1297
1298 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1299 const int inner_class_info_index = 0;
1300 const int outer_class_info_index = 1;
1301
1302 JvmtiVMObjectAllocEventCollector oam;
1303 // ofClass is a reference to a java_lang_Class object. The mirror object
1304 // of an instanceKlass
1305
1306 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1307 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1308 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1309 return (jobjectArray)JNIHandles::make_local(env, result);
1310 }
1311
1312 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1313
1314 if (k->inner_classes()->length() == 0) {
1315 // Neither an inner nor outer class
1316 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1317 return (jobjectArray)JNIHandles::make_local(env, result);
1318 }
1319
1320 // find inner class info
1321 typeArrayHandle icls(thread, k->inner_classes());
1322 constantPoolHandle cp(thread, k->constants());
1323 int length = icls->length();
1324
1325 // Allocate temp. result array
1326 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1327 objArrayHandle result (THREAD, r);
1328 int members = 0;
1329
1330 for(int i = 0; i < length; i += 4) {
1331 int ioff = icls->ushort_at(i + inner_class_info_index);
1332 int ooff = icls->ushort_at(i + outer_class_info_index);
1333
1334 if (ioff != 0 && ooff != 0) {
1335 // Check to see if the name matches the class we're looking for
1336 // before attempting to find the class.
1337 if (cp->klass_name_at_matches(k, ooff)) {
1338 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1339 if (outer_klass == k()) {
1340 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1341 instanceKlassHandle inner_klass (THREAD, ik);
1342
1343 // Throws an exception if outer klass has not declared k as
1344 // an inner klass
1345 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1346
1347 result->obj_at_put(members, inner_klass->java_mirror());
1348 members++;
1349 }
1350 }
1351 }
1352 }
1353
1354 if (members != length) {
1355 // Return array of right length
1356 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1357 for(int i = 0; i < members; i++) {
1358 res->obj_at_put(i, result->obj_at(i));
1359 }
1360 return (jobjectArray)JNIHandles::make_local(env, res);
1361 }
1362
1363 return (jobjectArray)JNIHandles::make_local(env, result());
1364 JVM_END
1365
1366
1367 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1368 {
1369 // ofClass is a reference to a java_lang_Class object.
1370 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1371 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1372 return NULL;
1373 }
1374
1375 bool inner_is_member = false;
1376 klassOop outer_klass
1377 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1378 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1379 if (outer_klass == NULL) return NULL; // already a top-level class
1380 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1381 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1382 }
1383 JVM_END
1384
1385 // should be in instanceKlass.cpp, but is here for historical reasons
1386 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1387 bool* inner_is_member,
1388 TRAPS) {
1389 Thread* thread = THREAD;
1390 const int inner_class_info_index = inner_class_inner_class_info_offset;
1391 const int outer_class_info_index = inner_class_outer_class_info_offset;
1392
1393 if (k->inner_classes()->length() == 0) {
1394 // No inner class info => no declaring class
1395 return NULL;
1396 }
1397
1398 typeArrayHandle i_icls(thread, k->inner_classes());
1399 constantPoolHandle i_cp(thread, k->constants());
1400 int i_length = i_icls->length();
1401
1402 bool found = false;
1403 klassOop ok;
1404 instanceKlassHandle outer_klass;
1405 *inner_is_member = false;
1406
1407 // Find inner_klass attribute
1408 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1409 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1410 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1411 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1412 if (ioff != 0) {
1413 // Check to see if the name matches the class we're looking for
1414 // before attempting to find the class.
1415 if (i_cp->klass_name_at_matches(k, ioff)) {
1416 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1417 found = (k() == inner_klass);
1418 if (found && ooff != 0) {
1419 ok = i_cp->klass_at(ooff, CHECK_NULL);
1420 outer_klass = instanceKlassHandle(thread, ok);
1421 *inner_is_member = true;
1422 }
1423 }
1424 }
1425 }
1426
1427 if (found && outer_klass.is_null()) {
1428 // It may be anonymous; try for that.
1429 int encl_method_class_idx = k->enclosing_method_class_index();
1430 if (encl_method_class_idx != 0) {
1431 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1432 outer_klass = instanceKlassHandle(thread, ok);
1433 *inner_is_member = false;
1434 }
1435 }
1436
1437 // If no inner class attribute found for this class.
1438 if (outer_klass.is_null()) return NULL;
1439
1440 // Throws an exception if outer klass has not declared k as an inner klass
1441 // We need evidence that each klass knows about the other, or else
1442 // the system could allow a spoof of an inner class to gain access rights.
1443 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1444 return outer_klass();
1445 }
1446
1447 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1448 assert (cls != NULL, "illegal class");
1449 JVMWrapper("JVM_GetClassSignature");
1450 JvmtiVMObjectAllocEventCollector oam;
1451 ResourceMark rm(THREAD);
1452 // Return null for arrays and primatives
1453 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1454 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1455 if (Klass::cast(k)->oop_is_instance()) {
1456 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1457 if (sym == NULL) return NULL;
1458 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1459 return (jstring) JNIHandles::make_local(env, str());
1460 }
1461 }
1462 return NULL;
1463 JVM_END
1464
1465
1466 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1467 assert (cls != NULL, "illegal class");
1468 JVMWrapper("JVM_GetClassAnnotations");
1469 ResourceMark rm(THREAD);
1470 // Return null for arrays and primitives
1471 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1472 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1473 if (Klass::cast(k)->oop_is_instance()) {
1474 return (jbyteArray) JNIHandles::make_local(env,
1475 instanceKlass::cast(k)->class_annotations());
1476 }
1477 }
1478 return NULL;
1479 JVM_END
1480
1481
1482 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1483 assert(field != NULL, "illegal field");
1484 JVMWrapper("JVM_GetFieldAnnotations");
1485
1486 // some of this code was adapted from from jni_FromReflectedField
1487
1488 // field is a handle to a java.lang.reflect.Field object
1489 oop reflected = JNIHandles::resolve_non_null(field);
1490 oop mirror = java_lang_reflect_Field::clazz(reflected);
1491 klassOop k = java_lang_Class::as_klassOop(mirror);
1492 int slot = java_lang_reflect_Field::slot(reflected);
1493 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1494
1495 fieldDescriptor fd;
1496 KlassHandle kh(THREAD, k);
1497 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1498
1499 if (modifiers & JVM_ACC_STATIC) {
1500 // for static fields we only look in the current class
1501 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1502 true, &fd)) {
1503 assert(false, "cannot find static field");
1504 return NULL; // robustness
1505 }
1506 } else {
1507 // for instance fields we start with the current class and work
1508 // our way up through the superclass chain
1509 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1510 &fd)) {
1511 assert(false, "cannot find instance field");
1512 return NULL; // robustness
1513 }
1514 }
1515
1516 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1517 JVM_END
1518
1519
1520 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1521 // some of this code was adapted from from jni_FromReflectedMethod
1522
1523 oop reflected = JNIHandles::resolve_non_null(method);
1524 oop mirror = NULL;
1525 int slot = 0;
1526
1527 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1528 mirror = java_lang_reflect_Constructor::clazz(reflected);
1529 slot = java_lang_reflect_Constructor::slot(reflected);
1530 } else {
1531 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1532 "wrong type");
1533 mirror = java_lang_reflect_Method::clazz(reflected);
1534 slot = java_lang_reflect_Method::slot(reflected);
1535 }
1536 klassOop k = java_lang_Class::as_klassOop(mirror);
1537
1538 KlassHandle kh(THREAD, k);
1539 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1540 if (m == NULL) {
1541 assert(false, "cannot find method");
1542 return NULL; // robustness
1543 }
1544
1545 return m;
1546 }
1547
1548
1549 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1550 JVMWrapper("JVM_GetMethodAnnotations");
1551
1552 // method is a handle to a java.lang.reflect.Method object
1553 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1554 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1555 JVM_END
1556
1557
1558 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1559 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1560
1561 // method is a handle to a java.lang.reflect.Method object
1562 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1563 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1564 JVM_END
1565
1566
1567 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1568 JVMWrapper("JVM_GetMethodParameterAnnotations");
1569
1570 // method is a handle to a java.lang.reflect.Method object
1571 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1572 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1573 JVM_END
1574
1575
1576 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1577
1578 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1579 {
1580 JVMWrapper("JVM_GetClassDeclaredFields");
1581 JvmtiVMObjectAllocEventCollector oam;
1582
1583 // Exclude primitive types and array types
1584 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1585 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1586 // Return empty array
1587 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1588 return (jobjectArray) JNIHandles::make_local(env, res);
1589 }
1590
1591 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1592 constantPoolHandle cp(THREAD, k->constants());
1593
1594 // Ensure class is linked
1595 k->link_class(CHECK_NULL);
1596
1597 // 4496456 We need to filter out java.lang.Throwable.backtrace
1598 bool skip_backtrace = false;
1599
1600 // Allocate result
1601 int num_fields;
1602
1603 if (publicOnly) {
1604 num_fields = 0;
1605 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1606 if (fs.access_flags().is_public()) ++num_fields;
1607 }
1608 } else {
1609 num_fields = k->java_fields_count();
1610
1611 if (k() == SystemDictionary::Throwable_klass()) {
1612 num_fields--;
1613 skip_backtrace = true;
1614 }
1615 }
1616
1617 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1618 objArrayHandle result (THREAD, r);
1619
1620 int out_idx = 0;
1621 fieldDescriptor fd;
1622 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1623 if (skip_backtrace) {
1624 // 4496456 skip java.lang.Throwable.backtrace
1625 int offset = fs.offset();
1626 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1627 }
1628
1629 if (!publicOnly || fs.access_flags().is_public()) {
1630 fd.initialize(k(), fs.index());
1631 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1632 result->obj_at_put(out_idx, field);
1633 ++out_idx;
1634 }
1635 }
1636 assert(out_idx == num_fields, "just checking");
1637 return (jobjectArray) JNIHandles::make_local(env, result());
1638 }
1639 JVM_END
1640
1641 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1642 {
1643 JVMWrapper("JVM_GetClassDeclaredMethods");
1644 JvmtiVMObjectAllocEventCollector oam;
1645
1646 // Exclude primitive types and array types
1647 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1648 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1649 // Return empty array
1650 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1651 return (jobjectArray) JNIHandles::make_local(env, res);
1652 }
1653
1654 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1655
1656 // Ensure class is linked
1657 k->link_class(CHECK_NULL);
1658
1659 objArrayHandle methods (THREAD, k->methods());
1660 int methods_length = methods->length();
1661 int num_methods = 0;
1662
1663 int i;
1664 for (i = 0; i < methods_length; i++) {
1665 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1666 if (!method->is_initializer()) {
1667 if (!publicOnly || method->is_public()) {
1668 ++num_methods;
1669 }
1670 }
1671 }
1672
1673 // Allocate result
1674 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1675 objArrayHandle result (THREAD, r);
1676
1677 int out_idx = 0;
1678 for (i = 0; i < methods_length; i++) {
1679 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1680 if (!method->is_initializer()) {
1681 if (!publicOnly || method->is_public()) {
1682 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1683 result->obj_at_put(out_idx, m);
1684 ++out_idx;
1685 }
1686 }
1687 }
1688 assert(out_idx == num_methods, "just checking");
1689 return (jobjectArray) JNIHandles::make_local(env, result());
1690 }
1691 JVM_END
1692
1693 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1694 {
1695 JVMWrapper("JVM_GetClassDeclaredConstructors");
1696 JvmtiVMObjectAllocEventCollector oam;
1697
1698 // Exclude primitive types and array types
1699 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1700 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1701 // Return empty array
1702 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1703 return (jobjectArray) JNIHandles::make_local(env, res);
1704 }
1705
1706 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1707
1708 // Ensure class is linked
1709 k->link_class(CHECK_NULL);
1710
1711 objArrayHandle methods (THREAD, k->methods());
1712 int methods_length = methods->length();
1713 int num_constructors = 0;
1714
1715 int i;
1716 for (i = 0; i < methods_length; i++) {
1717 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1718 if (method->is_initializer() && !method->is_static()) {
1719 if (!publicOnly || method->is_public()) {
1720 ++num_constructors;
1721 }
1722 }
1723 }
1724
1725 // Allocate result
1726 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1727 objArrayHandle result(THREAD, r);
1728
1729 int out_idx = 0;
1730 for (i = 0; i < methods_length; i++) {
1731 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1732 if (method->is_initializer() && !method->is_static()) {
1733 if (!publicOnly || method->is_public()) {
1734 oop m = Reflection::new_constructor(method, CHECK_NULL);
1735 result->obj_at_put(out_idx, m);
1736 ++out_idx;
1737 }
1738 }
1739 }
1740 assert(out_idx == num_constructors, "just checking");
1741 return (jobjectArray) JNIHandles::make_local(env, result());
1742 }
1743 JVM_END
1744
1745 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1746 {
1747 JVMWrapper("JVM_GetClassAccessFlags");
1748 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1749 // Primitive type
1750 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1751 }
1752
1753 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1754 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1755 }
1756 JVM_END
1757
1758
1759 // Constant pool access //////////////////////////////////////////////////////////
1760
1761 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1762 {
1763 JVMWrapper("JVM_GetClassConstantPool");
1764 JvmtiVMObjectAllocEventCollector oam;
1765
1766 // Return null for primitives and arrays
1767 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1768 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1769 if (Klass::cast(k)->oop_is_instance()) {
1770 instanceKlassHandle k_h(THREAD, k);
1771 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1772 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1773 return JNIHandles::make_local(jcp());
1774 }
1775 }
1776 return NULL;
1777 }
1778 JVM_END
1779
1780
1781 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1782 {
1783 JVMWrapper("JVM_ConstantPoolGetSize");
1784 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1785 return cp->length();
1786 }
1787 JVM_END
1788
1789
1790 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1791 if (!cp->is_within_bounds(index)) {
1792 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1793 }
1794 }
1795
1796
1797 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1798 {
1799 JVMWrapper("JVM_ConstantPoolGetClassAt");
1800 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1801 bounds_check(cp, index, CHECK_NULL);
1802 constantTag tag = cp->tag_at(index);
1803 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1804 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1805 }
1806 klassOop k = cp->klass_at(index, CHECK_NULL);
1807 return (jclass) JNIHandles::make_local(k->java_mirror());
1808 }
1809 JVM_END
1810
1811
1812 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1813 {
1814 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1815 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1816 bounds_check(cp, index, CHECK_NULL);
1817 constantTag tag = cp->tag_at(index);
1818 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1819 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1820 }
1821 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1822 if (k == NULL) return NULL;
1823 return (jclass) JNIHandles::make_local(k->java_mirror());
1824 }
1825 JVM_END
1826
1827 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1828 constantTag tag = cp->tag_at(index);
1829 if (!tag.is_method() && !tag.is_interface_method()) {
1830 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1831 }
1832 int klass_ref = cp->uncached_klass_ref_index_at(index);
1833 klassOop k_o;
1834 if (force_resolution) {
1835 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1836 } else {
1837 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1838 if (k_o == NULL) return NULL;
1839 }
1840 instanceKlassHandle k(THREAD, k_o);
1841 Symbol* name = cp->uncached_name_ref_at(index);
1842 Symbol* sig = cp->uncached_signature_ref_at(index);
1843 methodHandle m (THREAD, k->find_method(name, sig));
1844 if (m.is_null()) {
1845 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1846 }
1847 oop method;
1848 if (!m->is_initializer() || m->is_static()) {
1849 method = Reflection::new_method(m, true, true, CHECK_NULL);
1850 } else {
1851 method = Reflection::new_constructor(m, CHECK_NULL);
1852 }
1853 return JNIHandles::make_local(method);
1854 }
1855
1856 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1857 {
1858 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1859 JvmtiVMObjectAllocEventCollector oam;
1860 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1861 bounds_check(cp, index, CHECK_NULL);
1862 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1863 return res;
1864 }
1865 JVM_END
1866
1867 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1868 {
1869 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1870 JvmtiVMObjectAllocEventCollector oam;
1871 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1872 bounds_check(cp, index, CHECK_NULL);
1873 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1874 return res;
1875 }
1876 JVM_END
1877
1878 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1879 constantTag tag = cp->tag_at(index);
1880 if (!tag.is_field()) {
1881 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1882 }
1883 int klass_ref = cp->uncached_klass_ref_index_at(index);
1884 klassOop k_o;
1885 if (force_resolution) {
1886 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1887 } else {
1888 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1889 if (k_o == NULL) return NULL;
1890 }
1891 instanceKlassHandle k(THREAD, k_o);
1892 Symbol* name = cp->uncached_name_ref_at(index);
1893 Symbol* sig = cp->uncached_signature_ref_at(index);
1894 fieldDescriptor fd;
1895 klassOop target_klass = k->find_field(name, sig, &fd);
1896 if (target_klass == NULL) {
1897 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1898 }
1899 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1900 return JNIHandles::make_local(field);
1901 }
1902
1903 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1904 {
1905 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1906 JvmtiVMObjectAllocEventCollector oam;
1907 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1908 bounds_check(cp, index, CHECK_NULL);
1909 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1910 return res;
1911 }
1912 JVM_END
1913
1914 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1915 {
1916 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1917 JvmtiVMObjectAllocEventCollector oam;
1918 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1919 bounds_check(cp, index, CHECK_NULL);
1920 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1921 return res;
1922 }
1923 JVM_END
1924
1925 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1926 {
1927 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1928 JvmtiVMObjectAllocEventCollector oam;
1929 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1930 bounds_check(cp, index, CHECK_NULL);
1931 constantTag tag = cp->tag_at(index);
1932 if (!tag.is_field_or_method()) {
1933 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1934 }
1935 int klass_ref = cp->uncached_klass_ref_index_at(index);
1936 Symbol* klass_name = cp->klass_name_at(klass_ref);
1937 Symbol* member_name = cp->uncached_name_ref_at(index);
1938 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1939 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1940 objArrayHandle dest(THREAD, dest_o);
1941 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1942 dest->obj_at_put(0, str());
1943 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1944 dest->obj_at_put(1, str());
1945 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1946 dest->obj_at_put(2, str());
1947 return (jobjectArray) JNIHandles::make_local(dest());
1948 }
1949 JVM_END
1950
1951 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1952 {
1953 JVMWrapper("JVM_ConstantPoolGetIntAt");
1954 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1955 bounds_check(cp, index, CHECK_0);
1956 constantTag tag = cp->tag_at(index);
1957 if (!tag.is_int()) {
1958 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1959 }
1960 return cp->int_at(index);
1961 }
1962 JVM_END
1963
1964 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1965 {
1966 JVMWrapper("JVM_ConstantPoolGetLongAt");
1967 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1968 bounds_check(cp, index, CHECK_(0L));
1969 constantTag tag = cp->tag_at(index);
1970 if (!tag.is_long()) {
1971 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1972 }
1973 return cp->long_at(index);
1974 }
1975 JVM_END
1976
1977 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1978 {
1979 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1980 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1981 bounds_check(cp, index, CHECK_(0.0f));
1982 constantTag tag = cp->tag_at(index);
1983 if (!tag.is_float()) {
1984 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1985 }
1986 return cp->float_at(index);
1987 }
1988 JVM_END
1989
1990 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1991 {
1992 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1993 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1994 bounds_check(cp, index, CHECK_(0.0));
1995 constantTag tag = cp->tag_at(index);
1996 if (!tag.is_double()) {
1997 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1998 }
1999 return cp->double_at(index);
2000 }
2001 JVM_END
2002
2003 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2004 {
2005 JVMWrapper("JVM_ConstantPoolGetStringAt");
2006 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2007 bounds_check(cp, index, CHECK_NULL);
2008 constantTag tag = cp->tag_at(index);
2009 if (!tag.is_string() && !tag.is_unresolved_string()) {
2010 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2011 }
2012 oop str = cp->string_at(index, CHECK_NULL);
2013 return (jstring) JNIHandles::make_local(str);
2014 }
2015 JVM_END
2016
2017 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2018 {
2019 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2020 JvmtiVMObjectAllocEventCollector oam;
2021 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2022 bounds_check(cp, index, CHECK_NULL);
2023 constantTag tag = cp->tag_at(index);
2024 if (!tag.is_symbol()) {
2025 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2026 }
2027 Symbol* sym = cp->symbol_at(index);
2028 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2029 return (jstring) JNIHandles::make_local(str());
2030 }
2031 JVM_END
2032
2033
2034 // Assertion support. //////////////////////////////////////////////////////////
2035
2036 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2037 JVMWrapper("JVM_DesiredAssertionStatus");
2038 assert(cls != NULL, "bad class");
2039
2040 oop r = JNIHandles::resolve(cls);
2041 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2042 if (java_lang_Class::is_primitive(r)) return false;
2043
2044 klassOop k = java_lang_Class::as_klassOop(r);
2045 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2046 if (! Klass::cast(k)->oop_is_instance()) return false;
2047
2048 ResourceMark rm(THREAD);
2049 const char* name = Klass::cast(k)->name()->as_C_string();
2050 bool system_class = Klass::cast(k)->class_loader() == NULL;
2051 return JavaAssertions::enabled(name, system_class);
2052
2053 JVM_END
2054
2055
2056 // Return a new AssertionStatusDirectives object with the fields filled in with
2057 // command-line assertion arguments (i.e., -ea, -da).
2058 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2059 JVMWrapper("JVM_AssertionStatusDirectives");
2060 JvmtiVMObjectAllocEventCollector oam;
2061 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2062 return JNIHandles::make_local(env, asd);
2063 JVM_END
2064
2065 // Verification ////////////////////////////////////////////////////////////////////////////////
2066
2067 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2068
2069 // RedefineClasses support: bug 6214132 caused verification to fail.
2070 // All functions from this section should call the jvmtiThreadSate function:
2071 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2072 // The function returns a klassOop of the _scratch_class if the verifier
2073 // was invoked in the middle of the class redefinition.
2074 // Otherwise it returns its argument value which is the _the_class klassOop.
2075 // Please, refer to the description in the jvmtiThreadSate.hpp.
2076
2077 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2078 JVMWrapper("JVM_GetClassNameUTF");
2079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2080 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2081 return Klass::cast(k)->name()->as_utf8();
2082 JVM_END
2083
2084
2085 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2086 JVMWrapper("JVM_GetClassCPTypes");
2087 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2088 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2089 // types will have length zero if this is not an instanceKlass
2090 // (length is determined by call to JVM_GetClassCPEntriesCount)
2091 if (Klass::cast(k)->oop_is_instance()) {
2092 constantPoolOop cp = instanceKlass::cast(k)->constants();
2093 for (int index = cp->length() - 1; index >= 0; index--) {
2094 constantTag tag = cp->tag_at(index);
2095 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2096 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2097 }
2098 }
2099 JVM_END
2100
2101
2102 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2103 JVMWrapper("JVM_GetClassCPEntriesCount");
2104 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2105 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2106 if (!Klass::cast(k)->oop_is_instance())
2107 return 0;
2108 return instanceKlass::cast(k)->constants()->length();
2109 JVM_END
2110
2111
2112 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2113 JVMWrapper("JVM_GetClassFieldsCount");
2114 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2115 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2116 if (!Klass::cast(k)->oop_is_instance())
2117 return 0;
2118 return instanceKlass::cast(k)->java_fields_count();
2119 JVM_END
2120
2121
2122 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2123 JVMWrapper("JVM_GetClassMethodsCount");
2124 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2125 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2126 if (!Klass::cast(k)->oop_is_instance())
2127 return 0;
2128 return instanceKlass::cast(k)->methods()->length();
2129 JVM_END
2130
2131
2132 // The following methods, used for the verifier, are never called with
2133 // array klasses, so a direct cast to instanceKlass is safe.
2134 // Typically, these methods are called in a loop with bounds determined
2135 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2136 // zero for arrays.
2137 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2138 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2139 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2140 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2141 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2142 int length = methodOop(method)->checked_exceptions_length();
2143 if (length > 0) {
2144 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2145 for (int i = 0; i < length; i++) {
2146 exceptions[i] = table[i].class_cp_index;
2147 }
2148 }
2149 JVM_END
2150
2151
2152 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2153 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2154 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2156 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2157 return methodOop(method)->checked_exceptions_length();
2158 JVM_END
2159
2160
2161 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2162 JVMWrapper("JVM_GetMethodIxByteCode");
2163 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2165 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2166 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2167 JVM_END
2168
2169
2170 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2171 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2172 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2173 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2174 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2175 return methodOop(method)->code_size();
2176 JVM_END
2177
2178
2179 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2180 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2181 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2182 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2183 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2184 typeArrayOop extable = methodOop(method)->exception_table();
2185 entry->start_pc = extable->int_at(entry_index * 4);
2186 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2187 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2188 entry->catchType = extable->int_at(entry_index * 4 + 3);
2189 JVM_END
2190
2191
2192 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2193 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2194 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2195 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2196 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2197 return methodOop(method)->exception_table()->length() / 4;
2198 JVM_END
2199
2200
2201 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2202 JVMWrapper("JVM_GetMethodIxModifiers");
2203 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2204 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2205 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2206 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2207 JVM_END
2208
2209
2210 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2211 JVMWrapper("JVM_GetFieldIxModifiers");
2212 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2213 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2214 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2215 JVM_END
2216
2217
2218 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2219 JVMWrapper("JVM_GetMethodIxLocalsCount");
2220 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2221 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2222 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2223 return methodOop(method)->max_locals();
2224 JVM_END
2225
2226
2227 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2228 JVMWrapper("JVM_GetMethodIxArgsSize");
2229 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2230 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2231 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2232 return methodOop(method)->size_of_parameters();
2233 JVM_END
2234
2235
2236 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2237 JVMWrapper("JVM_GetMethodIxMaxStack");
2238 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2239 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2240 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2241 return methodOop(method)->max_stack();
2242 JVM_END
2243
2244
2245 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2246 JVMWrapper("JVM_IsConstructorIx");
2247 ResourceMark rm(THREAD);
2248 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2249 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2250 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2251 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2252 JVM_END
2253
2254
2255 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2256 JVMWrapper("JVM_GetMethodIxIxUTF");
2257 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2258 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2259 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2260 return methodOop(method)->name()->as_utf8();
2261 JVM_END
2262
2263
2264 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2265 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2266 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2268 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2269 return methodOop(method)->signature()->as_utf8();
2270 JVM_END
2271
2272 /**
2273 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2274 * read entries in the constant pool. Since the old verifier always
2275 * works on a copy of the code, it will not see any rewriting that
2276 * may possibly occur in the middle of verification. So it is important
2277 * that nothing it calls tries to use the cpCache instead of the raw
2278 * constant pool, so we must use cp->uncached_x methods when appropriate.
2279 */
2280 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2281 JVMWrapper("JVM_GetCPFieldNameUTF");
2282 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2283 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2284 constantPoolOop cp = instanceKlass::cast(k)->constants();
2285 switch (cp->tag_at(cp_index).value()) {
2286 case JVM_CONSTANT_Fieldref:
2287 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2288 default:
2289 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2290 }
2291 ShouldNotReachHere();
2292 return NULL;
2293 JVM_END
2294
2295
2296 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2297 JVMWrapper("JVM_GetCPMethodNameUTF");
2298 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300 constantPoolOop cp = instanceKlass::cast(k)->constants();
2301 switch (cp->tag_at(cp_index).value()) {
2302 case JVM_CONSTANT_InterfaceMethodref:
2303 case JVM_CONSTANT_Methodref:
2304 case JVM_CONSTANT_NameAndType: // for invokedynamic
2305 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2306 default:
2307 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2308 }
2309 ShouldNotReachHere();
2310 return NULL;
2311 JVM_END
2312
2313
2314 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2315 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2316 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2317 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2318 constantPoolOop cp = instanceKlass::cast(k)->constants();
2319 switch (cp->tag_at(cp_index).value()) {
2320 case JVM_CONSTANT_InterfaceMethodref:
2321 case JVM_CONSTANT_Methodref:
2322 case JVM_CONSTANT_NameAndType: // for invokedynamic
2323 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2324 default:
2325 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2326 }
2327 ShouldNotReachHere();
2328 return NULL;
2329 JVM_END
2330
2331
2332 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2333 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2334 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2335 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2336 constantPoolOop cp = instanceKlass::cast(k)->constants();
2337 switch (cp->tag_at(cp_index).value()) {
2338 case JVM_CONSTANT_Fieldref:
2339 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2340 default:
2341 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2342 }
2343 ShouldNotReachHere();
2344 return NULL;
2345 JVM_END
2346
2347
2348 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2349 JVMWrapper("JVM_GetCPClassNameUTF");
2350 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 constantPoolOop cp = instanceKlass::cast(k)->constants();
2353 Symbol* classname = cp->klass_name_at(cp_index);
2354 return classname->as_utf8();
2355 JVM_END
2356
2357
2358 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2359 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2360 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 constantPoolOop cp = instanceKlass::cast(k)->constants();
2363 switch (cp->tag_at(cp_index).value()) {
2364 case JVM_CONSTANT_Fieldref: {
2365 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2366 Symbol* classname = cp->klass_name_at(class_index);
2367 return classname->as_utf8();
2368 }
2369 default:
2370 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2371 }
2372 ShouldNotReachHere();
2373 return NULL;
2374 JVM_END
2375
2376
2377 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2378 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2379 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 constantPoolOop cp = instanceKlass::cast(k)->constants();
2382 switch (cp->tag_at(cp_index).value()) {
2383 case JVM_CONSTANT_Methodref:
2384 case JVM_CONSTANT_InterfaceMethodref: {
2385 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2386 Symbol* classname = cp->klass_name_at(class_index);
2387 return classname->as_utf8();
2388 }
2389 default:
2390 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2391 }
2392 ShouldNotReachHere();
2393 return NULL;
2394 JVM_END
2395
2396
2397 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2398 JVMWrapper("JVM_GetCPFieldModifiers");
2399 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2400 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2403 constantPoolOop cp = instanceKlass::cast(k)->constants();
2404 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2405 switch (cp->tag_at(cp_index).value()) {
2406 case JVM_CONSTANT_Fieldref: {
2407 Symbol* name = cp->uncached_name_ref_at(cp_index);
2408 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2409 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2410 if (fs.name() == name && fs.signature() == signature) {
2411 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2412 }
2413 }
2414 return -1;
2415 }
2416 default:
2417 fatal("JVM_GetCPFieldModifiers: illegal constant");
2418 }
2419 ShouldNotReachHere();
2420 return 0;
2421 JVM_END
2422
2423
2424 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2425 JVMWrapper("JVM_GetCPMethodModifiers");
2426 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2427 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2430 constantPoolOop cp = instanceKlass::cast(k)->constants();
2431 switch (cp->tag_at(cp_index).value()) {
2432 case JVM_CONSTANT_Methodref:
2433 case JVM_CONSTANT_InterfaceMethodref: {
2434 Symbol* name = cp->uncached_name_ref_at(cp_index);
2435 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2436 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2437 int methods_count = methods->length();
2438 for (int i = 0; i < methods_count; i++) {
2439 methodOop method = methodOop(methods->obj_at(i));
2440 if (method->name() == name && method->signature() == signature) {
2441 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2442 }
2443 }
2444 return -1;
2445 }
2446 default:
2447 fatal("JVM_GetCPMethodModifiers: illegal constant");
2448 }
2449 ShouldNotReachHere();
2450 return 0;
2451 JVM_END
2452
2453
2454 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2455
2456 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2457 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2458 JVM_END
2459
2460
2461 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2462 JVMWrapper("JVM_IsSameClassPackage");
2463 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2464 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2465 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2466 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2467 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2468 JVM_END
2469
2470
2471 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2472
2473 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2474 JVMWrapper2("JVM_Open (%s)", fname);
2475
2476 //%note jvm_r6
2477 int result = os::open(fname, flags, mode);
2478 if (result >= 0) {
2479 return result;
2480 } else {
2481 switch(errno) {
2482 case EEXIST:
2483 return JVM_EEXIST;
2484 default:
2485 return -1;
2486 }
2487 }
2488 JVM_END
2489
2490
2491 JVM_LEAF(jint, JVM_Close(jint fd))
2492 JVMWrapper2("JVM_Close (0x%x)", fd);
2493 //%note jvm_r6
2494 return os::close(fd);
2495 JVM_END
2496
2497
2498 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2499 JVMWrapper2("JVM_Read (0x%x)", fd);
2500
2501 //%note jvm_r6
2502 return (jint)os::restartable_read(fd, buf, nbytes);
2503 JVM_END
2504
2505
2506 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2507 JVMWrapper2("JVM_Write (0x%x)", fd);
2508
2509 //%note jvm_r6
2510 return (jint)os::write(fd, buf, nbytes);
2511 JVM_END
2512
2513
2514 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2515 JVMWrapper2("JVM_Available (0x%x)", fd);
2516 //%note jvm_r6
2517 return os::available(fd, pbytes);
2518 JVM_END
2519
2520
2521 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2522 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2523 //%note jvm_r6
2524 return os::lseek(fd, offset, whence);
2525 JVM_END
2526
2527
2528 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2529 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2530 return os::ftruncate(fd, length);
2531 JVM_END
2532
2533
2534 JVM_LEAF(jint, JVM_Sync(jint fd))
2535 JVMWrapper2("JVM_Sync (0x%x)", fd);
2536 //%note jvm_r6
2537 return os::fsync(fd);
2538 JVM_END
2539
2540
2541 // Printing support //////////////////////////////////////////////////
2542 extern "C" {
2543
2544 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2545 // see bug 4399518, 4417214
2546 if ((intptr_t)count <= 0) return -1;
2547 return vsnprintf(str, count, fmt, args);
2548 }
2549
2550
2551 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2552 va_list args;
2553 int len;
2554 va_start(args, fmt);
2555 len = jio_vsnprintf(str, count, fmt, args);
2556 va_end(args);
2557 return len;
2558 }
2559
2560
2561 int jio_fprintf(FILE* f, const char *fmt, ...) {
2562 int len;
2563 va_list args;
2564 va_start(args, fmt);
2565 len = jio_vfprintf(f, fmt, args);
2566 va_end(args);
2567 return len;
2568 }
2569
2570
2571 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2572 if (Arguments::vfprintf_hook() != NULL) {
2573 return Arguments::vfprintf_hook()(f, fmt, args);
2574 } else {
2575 return vfprintf(f, fmt, args);
2576 }
2577 }
2578
2579
2580 JNIEXPORT int jio_printf(const char *fmt, ...) {
2581 int len;
2582 va_list args;
2583 va_start(args, fmt);
2584 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2585 va_end(args);
2586 return len;
2587 }
2588
2589
2590 // HotSpot specific jio method
2591 void jio_print(const char* s) {
2592 // Try to make this function as atomic as possible.
2593 if (Arguments::vfprintf_hook() != NULL) {
2594 jio_fprintf(defaultStream::output_stream(), "%s", s);
2595 } else {
2596 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2597 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2598 }
2599 }
2600
2601 } // Extern C
2602
2603 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2604
2605 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2606 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2607 // OSThread objects. The exception to this rule is when the target object is the thread
2608 // doing the operation, in which case we know that the thread won't exit until the
2609 // operation is done (all exits being voluntary). There are a few cases where it is
2610 // rather silly to do operations on yourself, like resuming yourself or asking whether
2611 // you are alive. While these can still happen, they are not subject to deadlocks if
2612 // the lock is held while the operation occurs (this is not the case for suspend, for
2613 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2614 // implementation is local to this file, we always lock Threads_lock for that one.
2615
2616 static void thread_entry(JavaThread* thread, TRAPS) {
2617 HandleMark hm(THREAD);
2618 Handle obj(THREAD, thread->threadObj());
2619 JavaValue result(T_VOID);
2620 JavaCalls::call_virtual(&result,
2621 obj,
2622 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2623 vmSymbols::run_method_name(),
2624 vmSymbols::void_method_signature(),
2625 THREAD);
2626 }
2627
2628
2629 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2630 JVMWrapper("JVM_StartThread");
2631 JavaThread *native_thread = NULL;
2632
2633 // We cannot hold the Threads_lock when we throw an exception,
2634 // due to rank ordering issues. Example: we might need to grab the
2635 // Heap_lock while we construct the exception.
2636 bool throw_illegal_thread_state = false;
2637
2638 // We must release the Threads_lock before we can post a jvmti event
2639 // in Thread::start.
2640 {
2641 // Ensure that the C++ Thread and OSThread structures aren't freed before
2642 // we operate.
2643 MutexLocker mu(Threads_lock);
2644
2645 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2646 // re-starting an already started thread, so we should usually find
2647 // that the JavaThread is null. However for a JNI attached thread
2648 // there is a small window between the Thread object being created
2649 // (with its JavaThread set) and the update to its threadStatus, so we
2650 // have to check for this
2651 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2652 throw_illegal_thread_state = true;
2653 } else {
2654 // We could also check the stillborn flag to see if this thread was already stopped, but
2655 // for historical reasons we let the thread detect that itself when it starts running
2656
2657 jlong size =
2658 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2659 // Allocate the C++ Thread structure and create the native thread. The
2660 // stack size retrieved from java is signed, but the constructor takes
2661 // size_t (an unsigned type), so avoid passing negative values which would
2662 // result in really large stacks.
2663 size_t sz = size > 0 ? (size_t) size : 0;
2664 native_thread = new JavaThread(&thread_entry, sz);
2665
2666 // At this point it may be possible that no osthread was created for the
2667 // JavaThread due to lack of memory. Check for this situation and throw
2668 // an exception if necessary. Eventually we may want to change this so
2669 // that we only grab the lock if the thread was created successfully -
2670 // then we can also do this check and throw the exception in the
2671 // JavaThread constructor.
2672 if (native_thread->osthread() != NULL) {
2673 // Note: the current thread is not being used within "prepare".
2674 native_thread->prepare(jthread);
2675 }
2676 }
2677 }
2678
2679 if (throw_illegal_thread_state) {
2680 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2681 }
2682
2683 assert(native_thread != NULL, "Starting null thread?");
2684
2685 if (native_thread->osthread() == NULL) {
2686 // No one should hold a reference to the 'native_thread'.
2687 delete native_thread;
2688 if (JvmtiExport::should_post_resource_exhausted()) {
2689 JvmtiExport::post_resource_exhausted(
2690 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2691 "unable to create new native thread");
2692 }
2693 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2694 "unable to create new native thread");
2695 }
2696
2697 Thread::start(native_thread);
2698
2699 JVM_END
2700
2701 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2702 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2703 // but is thought to be reliable and simple. In the case, where the receiver is the
2704 // same thread as the sender, no safepoint is needed.
2705 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2706 JVMWrapper("JVM_StopThread");
2707
2708 oop java_throwable = JNIHandles::resolve(throwable);
2709 if (java_throwable == NULL) {
2710 THROW(vmSymbols::java_lang_NullPointerException());
2711 }
2712 oop java_thread = JNIHandles::resolve_non_null(jthread);
2713 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2714 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2715 // First check if thread is alive
2716 if (receiver != NULL) {
2717 // Check if exception is getting thrown at self (use oop equality, since the
2718 // target object might exit)
2719 if (java_thread == thread->threadObj()) {
2720 THROW_OOP(java_throwable);
2721 } else {
2722 // Enques a VM_Operation to stop all threads and then deliver the exception...
2723 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2724 }
2725 }
2726 else {
2727 // Either:
2728 // - target thread has not been started before being stopped, or
2729 // - target thread already terminated
2730 // We could read the threadStatus to determine which case it is
2731 // but that is overkill as it doesn't matter. We must set the
2732 // stillborn flag for the first case, and if the thread has already
2733 // exited setting this flag has no affect
2734 java_lang_Thread::set_stillborn(java_thread);
2735 }
2736 JVM_END
2737
2738
2739 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2740 JVMWrapper("JVM_IsThreadAlive");
2741
2742 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2743 return java_lang_Thread::is_alive(thread_oop);
2744 JVM_END
2745
2746
2747 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2748 JVMWrapper("JVM_SuspendThread");
2749 oop java_thread = JNIHandles::resolve_non_null(jthread);
2750 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2751
2752 if (receiver != NULL) {
2753 // thread has run and has not exited (still on threads list)
2754
2755 {
2756 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2757 if (receiver->is_external_suspend()) {
2758 // Don't allow nested external suspend requests. We can't return
2759 // an error from this interface so just ignore the problem.
2760 return;
2761 }
2762 if (receiver->is_exiting()) { // thread is in the process of exiting
2763 return;
2764 }
2765 receiver->set_external_suspend();
2766 }
2767
2768 // java_suspend() will catch threads in the process of exiting
2769 // and will ignore them.
2770 receiver->java_suspend();
2771
2772 // It would be nice to have the following assertion in all the
2773 // time, but it is possible for a racing resume request to have
2774 // resumed this thread right after we suspended it. Temporarily
2775 // enable this assertion if you are chasing a different kind of
2776 // bug.
2777 //
2778 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2779 // receiver->is_being_ext_suspended(), "thread is not suspended");
2780 }
2781 JVM_END
2782
2783
2784 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2785 JVMWrapper("JVM_ResumeThread");
2786 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2787 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2788 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2789 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2790 // looks at it.
2791 MutexLocker ml(Threads_lock);
2792 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2793 if (thr != NULL) {
2794 // the thread has run and is not in the process of exiting
2795 thr->java_resume();
2796 }
2797 JVM_END
2798
2799
2800 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2801 JVMWrapper("JVM_SetThreadPriority");
2802 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2803 MutexLocker ml(Threads_lock);
2804 oop java_thread = JNIHandles::resolve_non_null(jthread);
2805 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2806 JavaThread* thr = java_lang_Thread::thread(java_thread);
2807 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2808 Thread::set_priority(thr, (ThreadPriority)prio);
2809 }
2810 JVM_END
2811
2812
2813 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2814 JVMWrapper("JVM_Yield");
2815 if (os::dont_yield()) return;
2816 HS_DTRACE_PROBE0(hotspot, thread__yield);
2817 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2818 // Critical for similar threading behaviour
2819 if (ConvertYieldToSleep) {
2820 os::sleep(thread, MinSleepInterval, false);
2821 } else {
2822 os::yield();
2823 }
2824 JVM_END
2825
2826
2827 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2828 JVMWrapper("JVM_Sleep");
2829
2830 if (millis < 0) {
2831 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2832 }
2833
2834 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2835 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2836 }
2837
2838 // Save current thread state and restore it at the end of this block.
2839 // And set new thread state to SLEEPING.
2840 JavaThreadSleepState jtss(thread);
2841
2842 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2843
2844 if (millis == 0) {
2845 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2846 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2847 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2848 // for SOLARIS
2849 if (ConvertSleepToYield) {
2850 os::yield();
2851 } else {
2852 ThreadState old_state = thread->osthread()->get_state();
2853 thread->osthread()->set_state(SLEEPING);
2854 os::sleep(thread, MinSleepInterval, false);
2855 thread->osthread()->set_state(old_state);
2856 }
2857 } else {
2858 ThreadState old_state = thread->osthread()->get_state();
2859 thread->osthread()->set_state(SLEEPING);
2860 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2861 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2862 // us while we were sleeping. We do not overwrite those.
2863 if (!HAS_PENDING_EXCEPTION) {
2864 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2865 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2866 // to properly restore the thread state. That's likely wrong.
2867 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2868 }
2869 }
2870 thread->osthread()->set_state(old_state);
2871 }
2872 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2873 JVM_END
2874
2875 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2876 JVMWrapper("JVM_CurrentThread");
2877 oop jthread = thread->threadObj();
2878 assert (thread != NULL, "no current thread!");
2879 return JNIHandles::make_local(env, jthread);
2880 JVM_END
2881
2882
2883 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2884 JVMWrapper("JVM_CountStackFrames");
2885
2886 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2887 oop java_thread = JNIHandles::resolve_non_null(jthread);
2888 bool throw_illegal_thread_state = false;
2889 int count = 0;
2890
2891 {
2892 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2893 // We need to re-resolve the java_thread, since a GC might have happened during the
2894 // acquire of the lock
2895 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2896
2897 if (thr == NULL) {
2898 // do nothing
2899 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2900 // Check whether this java thread has been suspended already. If not, throws
2901 // IllegalThreadStateException. We defer to throw that exception until
2902 // Threads_lock is released since loading exception class has to leave VM.
2903 // The correct way to test a thread is actually suspended is
2904 // wait_for_ext_suspend_completion(), but we can't call that while holding
2905 // the Threads_lock. The above tests are sufficient for our purposes
2906 // provided the walkability of the stack is stable - which it isn't
2907 // 100% but close enough for most practical purposes.
2908 throw_illegal_thread_state = true;
2909 } else {
2910 // Count all java activation, i.e., number of vframes
2911 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2912 // Native frames are not counted
2913 if (!vfst.method()->is_native()) count++;
2914 }
2915 }
2916 }
2917
2918 if (throw_illegal_thread_state) {
2919 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2920 "this thread is not suspended");
2921 }
2922 return count;
2923 JVM_END
2924
2925 // Consider: A better way to implement JVM_Interrupt() is to acquire
2926 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2927 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2928 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2929 // outside the critical section. Threads_lock is hot so we want to minimize
2930 // the hold-time. A cleaner interface would be to decompose interrupt into
2931 // two steps. The 1st phase, performed under Threads_lock, would return
2932 // a closure that'd be invoked after Threads_lock was dropped.
2933 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2934 // admit spurious wakeups.
2935
2936 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2937 JVMWrapper("JVM_Interrupt");
2938
2939 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2940 oop java_thread = JNIHandles::resolve_non_null(jthread);
2941 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2942 // We need to re-resolve the java_thread, since a GC might have happened during the
2943 // acquire of the lock
2944 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2945 if (thr != NULL) {
2946 Thread::interrupt(thr);
2947 }
2948 JVM_END
2949
2950
2951 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2952 JVMWrapper("JVM_IsInterrupted");
2953
2954 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2955 oop java_thread = JNIHandles::resolve_non_null(jthread);
2956 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2957 // We need to re-resolve the java_thread, since a GC might have happened during the
2958 // acquire of the lock
2959 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2960 if (thr == NULL) {
2961 return JNI_FALSE;
2962 } else {
2963 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2964 }
2965 JVM_END
2966
2967
2968 // Return true iff the current thread has locked the object passed in
2969
2970 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2971 JVMWrapper("JVM_HoldsLock");
2972 assert(THREAD->is_Java_thread(), "sanity check");
2973 if (obj == NULL) {
2974 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2975 }
2976 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2977 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2978 JVM_END
2979
2980
2981 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2982 JVMWrapper("JVM_DumpAllStacks");
2983 VM_PrintThreads op;
2984 VMThread::execute(&op);
2985 if (JvmtiExport::should_post_data_dump()) {
2986 JvmtiExport::post_data_dump();
2987 }
2988 JVM_END
2989
2990
2991 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2992
2993 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2994 assert(jthread->is_Java_thread(), "must be a Java thread");
2995 if (jthread->privileged_stack_top() == NULL) return false;
2996 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2997 oop loader = jthread->privileged_stack_top()->class_loader();
2998 if (loader == NULL) return true;
2999 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3000 if (trusted) return true;
3001 }
3002 return false;
3003 }
3004
3005 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3006 JVMWrapper("JVM_CurrentLoadedClass");
3007 ResourceMark rm(THREAD);
3008
3009 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3010 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3011 bool trusted = is_trusted_frame(thread, &vfst);
3012 if (trusted) return NULL;
3013
3014 methodOop m = vfst.method();
3015 if (!m->is_native()) {
3016 klassOop holder = m->method_holder();
3017 oop loader = instanceKlass::cast(holder)->class_loader();
3018 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3019 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3020 }
3021 }
3022 }
3023 return NULL;
3024 JVM_END
3025
3026
3027 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3028 JVMWrapper("JVM_CurrentClassLoader");
3029 ResourceMark rm(THREAD);
3030
3031 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3032
3033 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3034 bool trusted = is_trusted_frame(thread, &vfst);
3035 if (trusted) return NULL;
3036
3037 methodOop m = vfst.method();
3038 if (!m->is_native()) {
3039 klassOop holder = m->method_holder();
3040 assert(holder->is_klass(), "just checking");
3041 oop loader = instanceKlass::cast(holder)->class_loader();
3042 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3043 return JNIHandles::make_local(env, loader);
3044 }
3045 }
3046 }
3047 return NULL;
3048 JVM_END
3049
3050
3051 // Utility object for collecting method holders walking down the stack
3052 class KlassLink: public ResourceObj {
3053 public:
3054 KlassHandle klass;
3055 KlassLink* next;
3056
3057 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3058 };
3059
3060
3061 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3062 JVMWrapper("JVM_GetClassContext");
3063 ResourceMark rm(THREAD);
3064 JvmtiVMObjectAllocEventCollector oam;
3065 // Collect linked list of (handles to) method holders
3066 KlassLink* first = NULL;
3067 KlassLink* last = NULL;
3068 int depth = 0;
3069
3070 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3071 // Native frames are not returned
3072 if (!vfst.method()->is_native()) {
3073 klassOop holder = vfst.method()->method_holder();
3074 assert(holder->is_klass(), "just checking");
3075 depth++;
3076 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3077 if (first == NULL) {
3078 first = last = l;
3079 } else {
3080 last->next = l;
3081 last = l;
3082 }
3083 }
3084 }
3085
3086 // Create result array of type [Ljava/lang/Class;
3087 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3088 // Fill in mirrors corresponding to method holders
3089 int index = 0;
3090 while (first != NULL) {
3091 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3092 first = first->next;
3093 }
3094 assert(index == depth, "just checking");
3095
3096 return (jobjectArray) JNIHandles::make_local(env, result);
3097 JVM_END
3098
3099
3100 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3101 JVMWrapper("JVM_ClassDepth");
3102 ResourceMark rm(THREAD);
3103 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3104 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3105
3106 const char* str = java_lang_String::as_utf8_string(class_name_str());
3107 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3108 if (class_name_sym == NULL) {
3109 return -1;
3110 }
3111
3112 int depth = 0;
3113
3114 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3115 if (!vfst.method()->is_native()) {
3116 klassOop holder = vfst.method()->method_holder();
3117 assert(holder->is_klass(), "just checking");
3118 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3119 return depth;
3120 }
3121 depth++;
3122 }
3123 }
3124 return -1;
3125 JVM_END
3126
3127
3128 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3129 JVMWrapper("JVM_ClassLoaderDepth");
3130 ResourceMark rm(THREAD);
3131 int depth = 0;
3132 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3133 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3134 bool trusted = is_trusted_frame(thread, &vfst);
3135 if (trusted) return -1;
3136
3137 methodOop m = vfst.method();
3138 if (!m->is_native()) {
3139 klassOop holder = m->method_holder();
3140 assert(holder->is_klass(), "just checking");
3141 oop loader = instanceKlass::cast(holder)->class_loader();
3142 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3143 return depth;
3144 }
3145 depth++;
3146 }
3147 }
3148 return -1;
3149 JVM_END
3150
3151
3152 // java.lang.Package ////////////////////////////////////////////////////////////////
3153
3154
3155 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3156 JVMWrapper("JVM_GetSystemPackage");
3157 ResourceMark rm(THREAD);
3158 JvmtiVMObjectAllocEventCollector oam;
3159 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3160 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3161 return (jstring) JNIHandles::make_local(result);
3162 JVM_END
3163
3164
3165 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3166 JVMWrapper("JVM_GetSystemPackages");
3167 JvmtiVMObjectAllocEventCollector oam;
3168 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3169 return (jobjectArray) JNIHandles::make_local(result);
3170 JVM_END
3171
3172
3173 // ObjectInputStream ///////////////////////////////////////////////////////////////
3174
3175 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3176 if (current_class == NULL) {
3177 return true;
3178 }
3179 if ((current_class == field_class) || access.is_public()) {
3180 return true;
3181 }
3182
3183 if (access.is_protected()) {
3184 // See if current_class is a subclass of field_class
3185 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3186 return true;
3187 }
3188 }
3189
3190 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3191 }
3192
3193
3194 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3195 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3196 JVMWrapper("JVM_AllocateNewObject");
3197 JvmtiVMObjectAllocEventCollector oam;
3198 // Receiver is not used
3199 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3200 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3201
3202 // Cannot instantiate primitive types
3203 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3204 ResourceMark rm(THREAD);
3205 THROW_0(vmSymbols::java_lang_InvalidClassException());
3206 }
3207
3208 // Arrays not allowed here, must use JVM_AllocateNewArray
3209 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3210 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3211 ResourceMark rm(THREAD);
3212 THROW_0(vmSymbols::java_lang_InvalidClassException());
3213 }
3214
3215 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3216 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3217
3218 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3219
3220 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3221 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3222
3223 // Make sure klass is initialized, since we are about to instantiate one of them.
3224 curr_klass->initialize(CHECK_NULL);
3225
3226 methodHandle m (THREAD,
3227 init_klass->find_method(vmSymbols::object_initializer_name(),
3228 vmSymbols::void_method_signature()));
3229 if (m.is_null()) {
3230 ResourceMark rm(THREAD);
3231 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3232 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3233 vmSymbols::object_initializer_name(),
3234 vmSymbols::void_method_signature()));
3235 }
3236
3237 if (curr_klass == init_klass && !m->is_public()) {
3238 // Calling the constructor for class 'curr_klass'.
3239 // Only allow calls to a public no-arg constructor.
3240 // This path corresponds to creating an Externalizable object.
3241 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3242 }
3243
3244 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3245 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3246 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3247 }
3248
3249 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3250 // Call constructor m. This might call a constructor higher up in the hierachy
3251 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3252
3253 return JNIHandles::make_local(obj());
3254 JVM_END
3255
3256
3257 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3258 JVMWrapper("JVM_AllocateNewArray");
3259 JvmtiVMObjectAllocEventCollector oam;
3260 oop mirror = JNIHandles::resolve_non_null(currClass);
3261
3262 if (java_lang_Class::is_primitive(mirror)) {
3263 THROW_0(vmSymbols::java_lang_InvalidClassException());
3264 }
3265 klassOop k = java_lang_Class::as_klassOop(mirror);
3266 oop result;
3267
3268 if (k->klass_part()->oop_is_typeArray()) {
3269 // typeArray
3270 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3271 } else if (k->klass_part()->oop_is_objArray()) {
3272 // objArray
3273 objArrayKlassHandle oak(THREAD, k);
3274 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3275 result = oak->allocate(length, CHECK_NULL);
3276 } else {
3277 THROW_0(vmSymbols::java_lang_InvalidClassException());
3278 }
3279 return JNIHandles::make_local(env, result);
3280 JVM_END
3281
3282
3283 // Return the first non-null class loader up the execution stack, or null
3284 // if only code from the null class loader is on the stack.
3285
3286 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3287 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3288 // UseNewReflection
3289 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3290 klassOop holder = vfst.method()->method_holder();
3291 oop loader = instanceKlass::cast(holder)->class_loader();
3292 if (loader != NULL) {
3293 return JNIHandles::make_local(env, loader);
3294 }
3295 }
3296 return NULL;
3297 JVM_END
3298
3299
3300 // Load a class relative to the most recent class on the stack with a non-null
3301 // classloader.
3302 // This function has been deprecated and should not be considered part of the
3303 // specified JVM interface.
3304
3305 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3306 jclass currClass, jstring currClassName))
3307 JVMWrapper("JVM_LoadClass0");
3308 // Receiver is not used
3309 ResourceMark rm(THREAD);
3310
3311 // Class name argument is not guaranteed to be in internal format
3312 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3313 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3314
3315 const char* str = java_lang_String::as_utf8_string(string());
3316
3317 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3318 // It's impossible to create this class; the name cannot fit
3319 // into the constant pool.
3320 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3321 }
3322
3323 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3324 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3325 // Find the most recent class on the stack with a non-null classloader
3326 oop loader = NULL;
3327 oop protection_domain = NULL;
3328 if (curr_klass.is_null()) {
3329 for (vframeStream vfst(thread);
3330 !vfst.at_end() && loader == NULL;
3331 vfst.next()) {
3332 if (!vfst.method()->is_native()) {
3333 klassOop holder = vfst.method()->method_holder();
3334 loader = instanceKlass::cast(holder)->class_loader();
3335 protection_domain = instanceKlass::cast(holder)->protection_domain();
3336 }
3337 }
3338 } else {
3339 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3340 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3341 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3342 }
3343 Handle h_loader(THREAD, loader);
3344 Handle h_prot (THREAD, protection_domain);
3345 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3346 false, thread);
3347 if (TraceClassResolution && result != NULL) {
3348 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3349 }
3350 return result;
3351 JVM_END
3352
3353
3354 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3355
3356
3357 // resolve array handle and check arguments
3358 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3359 if (arr == NULL) {
3360 THROW_0(vmSymbols::java_lang_NullPointerException());
3361 }
3362 oop a = JNIHandles::resolve_non_null(arr);
3363 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3364 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3365 }
3366 return arrayOop(a);
3367 }
3368
3369
3370 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3371 JVMWrapper("JVM_GetArrayLength");
3372 arrayOop a = check_array(env, arr, false, CHECK_0);
3373 return a->length();
3374 JVM_END
3375
3376
3377 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3378 JVMWrapper("JVM_Array_Get");
3379 JvmtiVMObjectAllocEventCollector oam;
3380 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3381 jvalue value;
3382 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3383 oop box = Reflection::box(&value, type, CHECK_NULL);
3384 return JNIHandles::make_local(env, box);
3385 JVM_END
3386
3387
3388 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3389 JVMWrapper("JVM_GetPrimitiveArrayElement");
3390 jvalue value;
3391 value.i = 0; // to initialize value before getting used in CHECK
3392 arrayOop a = check_array(env, arr, true, CHECK_(value));
3393 assert(a->is_typeArray(), "just checking");
3394 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3395 BasicType wide_type = (BasicType) wCode;
3396 if (type != wide_type) {
3397 Reflection::widen(&value, type, wide_type, CHECK_(value));
3398 }
3399 return value;
3400 JVM_END
3401
3402
3403 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3404 JVMWrapper("JVM_SetArrayElement");
3405 arrayOop a = check_array(env, arr, false, CHECK);
3406 oop box = JNIHandles::resolve(val);
3407 jvalue value;
3408 value.i = 0; // to initialize value before getting used in CHECK
3409 BasicType value_type;
3410 if (a->is_objArray()) {
3411 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3412 value_type = Reflection::unbox_for_regular_object(box, &value);
3413 } else {
3414 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3415 }
3416 Reflection::array_set(&value, a, index, value_type, CHECK);
3417 JVM_END
3418
3419
3420 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3421 JVMWrapper("JVM_SetPrimitiveArrayElement");
3422 arrayOop a = check_array(env, arr, true, CHECK);
3423 assert(a->is_typeArray(), "just checking");
3424 BasicType value_type = (BasicType) vCode;
3425 Reflection::array_set(&v, a, index, value_type, CHECK);
3426 JVM_END
3427
3428
3429 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3430 JVMWrapper("JVM_NewArray");
3431 JvmtiVMObjectAllocEventCollector oam;
3432 oop element_mirror = JNIHandles::resolve(eltClass);
3433 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3434 return JNIHandles::make_local(env, result);
3435 JVM_END
3436
3437
3438 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3439 JVMWrapper("JVM_NewMultiArray");
3440 JvmtiVMObjectAllocEventCollector oam;
3441 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3442 oop element_mirror = JNIHandles::resolve(eltClass);
3443 assert(dim_array->is_typeArray(), "just checking");
3444 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3445 return JNIHandles::make_local(env, result);
3446 JVM_END
3447
3448
3449 // Networking library support ////////////////////////////////////////////////////////////////////
3450
3451 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3452 JVMWrapper("JVM_InitializeSocketLibrary");
3453 return 0;
3454 JVM_END
3455
3456
3457 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3458 JVMWrapper("JVM_Socket");
3459 return os::socket(domain, type, protocol);
3460 JVM_END
3461
3462
3463 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3464 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3465 //%note jvm_r6
3466 return os::socket_close(fd);
3467 JVM_END
3468
3469
3470 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3471 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3472 //%note jvm_r6
3473 return os::socket_shutdown(fd, howto);
3474 JVM_END
3475
3476
3477 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3478 JVMWrapper2("JVM_Recv (0x%x)", fd);
3479 //%note jvm_r6
3480 return os::recv(fd, buf, nBytes, flags);
3481 JVM_END
3482
3483
3484 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3485 JVMWrapper2("JVM_Send (0x%x)", fd);
3486 //%note jvm_r6
3487 return os::send(fd, buf, nBytes, flags);
3488 JVM_END
3489
3490
3491 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3492 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3493 //%note jvm_r6
3494 return os::timeout(fd, timeout);
3495 JVM_END
3496
3497
3498 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3499 JVMWrapper2("JVM_Listen (0x%x)", fd);
3500 //%note jvm_r6
3501 return os::listen(fd, count);
3502 JVM_END
3503
3504
3505 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3506 JVMWrapper2("JVM_Connect (0x%x)", fd);
3507 //%note jvm_r6
3508 return os::connect(fd, him, len);
3509 JVM_END
3510
3511
3512 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3513 JVMWrapper2("JVM_Bind (0x%x)", fd);
3514 //%note jvm_r6
3515 return os::bind(fd, him, len);
3516 JVM_END
3517
3518
3519 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3520 JVMWrapper2("JVM_Accept (0x%x)", fd);
3521 //%note jvm_r6
3522 return os::accept(fd, him, (int *)len);
3523 JVM_END
3524
3525
3526 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3527 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3528 //%note jvm_r6
3529 return os::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3530 JVM_END
3531
3532
3533 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3534 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3535 //%note jvm_r6
3536 return os::get_sock_name(fd, him, len);
3537 JVM_END
3538
3539
3540 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3541 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3542 //%note jvm_r6
3543 return os::sendto(fd, buf, len, flags, to, tolen);
3544 JVM_END
3545
3546
3547 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3548 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3549 //%note jvm_r6
3550 return os::socket_available(fd, pbytes);
3551 JVM_END
3552
3553
3554 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3555 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3556 //%note jvm_r6
3557 return os::get_sock_opt(fd, level, optname, optval, optlen);
3558 JVM_END
3559
3560
3561 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3562 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3563 //%note jvm_r6
3564 return os::set_sock_opt(fd, level, optname, optval, optlen);
3565 JVM_END
3566
3567 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3568 JVMWrapper("JVM_GetHostName");
3569 return os::get_host_name(name, namelen);
3570 JVM_END
3571
3572 // Library support ///////////////////////////////////////////////////////////////////////////
3573
3574 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3575 //%note jvm_ct
3576 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3577 char ebuf[1024];
3578 void *load_result;
3579 {
3580 ThreadToNativeFromVM ttnfvm(thread);
3581 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3582 }
3583 if (load_result == NULL) {
3584 char msg[1024];
3585 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3586 // Since 'ebuf' may contain a string encoded using
3587 // platform encoding scheme, we need to pass
3588 // Exceptions::unsafe_to_utf8 to the new_exception method
3589 // as the last argument. See bug 6367357.
3590 Handle h_exception =
3591 Exceptions::new_exception(thread,
3592 vmSymbols::java_lang_UnsatisfiedLinkError(),
3593 msg, Exceptions::unsafe_to_utf8);
3594
3595 THROW_HANDLE_0(h_exception);
3596 }
3597 return load_result;
3598 JVM_END
3599
3600
3601 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3602 JVMWrapper("JVM_UnloadLibrary");
3603 os::dll_unload(handle);
3604 JVM_END
3605
3606
3607 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3608 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3609 return os::dll_lookup(handle, name);
3610 JVM_END
3611
3612 // Floating point support ////////////////////////////////////////////////////////////////////
3613
3614 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3615 JVMWrapper("JVM_IsNaN");
3616 return g_isnan(a);
3617 JVM_END
3618
3619
3620
3621 // JNI version ///////////////////////////////////////////////////////////////////////////////
3622
3623 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3624 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3625 return Threads::is_supported_jni_version_including_1_1(version);
3626 JVM_END
3627
3628
3629 // String support ///////////////////////////////////////////////////////////////////////////
3630
3631 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3632 JVMWrapper("JVM_InternString");
3633 JvmtiVMObjectAllocEventCollector oam;
3634 if (str == NULL) return NULL;
3635 oop string = JNIHandles::resolve_non_null(str);
3636 oop result = StringTable::intern(string, CHECK_NULL);
3637 return (jstring) JNIHandles::make_local(env, result);
3638 JVM_END
3639
3640
3641 // Raw monitor support //////////////////////////////////////////////////////////////////////
3642
3643 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3644 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3645 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3646 // that only works with java threads.
3647
3648
3649 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3650 VM_Exit::block_if_vm_exited();
3651 JVMWrapper("JVM_RawMonitorCreate");
3652 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3653 }
3654
3655
3656 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3657 VM_Exit::block_if_vm_exited();
3658 JVMWrapper("JVM_RawMonitorDestroy");
3659 delete ((Mutex*) mon);
3660 }
3661
3662
3663 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3664 VM_Exit::block_if_vm_exited();
3665 JVMWrapper("JVM_RawMonitorEnter");
3666 ((Mutex*) mon)->jvm_raw_lock();
3667 return 0;
3668 }
3669
3670
3671 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3672 VM_Exit::block_if_vm_exited();
3673 JVMWrapper("JVM_RawMonitorExit");
3674 ((Mutex*) mon)->jvm_raw_unlock();
3675 }
3676
3677
3678 // Support for Serialization
3679
3680 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3681 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3682 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3683 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3684
3685 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3686 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3687 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3688 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3689
3690
3691 void initialize_converter_functions() {
3692 if (JDK_Version::is_gte_jdk14x_version()) {
3693 // These functions only exist for compatibility with 1.3.1 and earlier
3694 return;
3695 }
3696
3697 // called from universe_post_init()
3698 assert(
3699 int_bits_to_float_fn == NULL &&
3700 long_bits_to_double_fn == NULL &&
3701 float_to_int_bits_fn == NULL &&
3702 double_to_long_bits_fn == NULL ,
3703 "initialization done twice"
3704 );
3705 // initialize
3706 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3707 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3708 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3709 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3710 // verify
3711 assert(
3712 int_bits_to_float_fn != NULL &&
3713 long_bits_to_double_fn != NULL &&
3714 float_to_int_bits_fn != NULL &&
3715 double_to_long_bits_fn != NULL ,
3716 "initialization failed"
3717 );
3718 }
3719
3720
3721 // Serialization
3722 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3723 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3724 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3725
3726 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3727 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3728 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3729 oop o = JNIHandles::resolve(obj);
3730
3731 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3732 THROW(vmSymbols::java_lang_NullPointerException());
3733 }
3734
3735 jsize nfids = fids->length();
3736 if (nfids == 0) return;
3737
3738 if (tcodes->length() < nfids) {
3739 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3740 }
3741
3742 jsize off = 0;
3743 /* loop through fields, setting values */
3744 for (jsize i = 0; i < nfids; i++) {
3745 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3746 int field_offset;
3747 if (fid != NULL) {
3748 // NULL is a legal value for fid, but retrieving the field offset
3749 // trigger assertion in that case
3750 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3751 }
3752
3753 switch (tcodes->char_at(i)) {
3754 case 'Z':
3755 if (fid != NULL) {
3756 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3757 o->bool_field_put(field_offset, val);
3758 }
3759 off++;
3760 break;
3761
3762 case 'B':
3763 if (fid != NULL) {
3764 o->byte_field_put(field_offset, dbuf->byte_at(off));
3765 }
3766 off++;
3767 break;
3768
3769 case 'C':
3770 if (fid != NULL) {
3771 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3772 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3773 o->char_field_put(field_offset, val);
3774 }
3775 off += 2;
3776 break;
3777
3778 case 'S':
3779 if (fid != NULL) {
3780 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3781 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3782 o->short_field_put(field_offset, val);
3783 }
3784 off += 2;
3785 break;
3786
3787 case 'I':
3788 if (fid != NULL) {
3789 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3790 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3791 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3792 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3793 o->int_field_put(field_offset, ival);
3794 }
3795 off += 4;
3796 break;
3797
3798 case 'F':
3799 if (fid != NULL) {
3800 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3801 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3802 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3803 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3804 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3805 o->float_field_put(field_offset, fval);
3806 }
3807 off += 4;
3808 break;
3809
3810 case 'J':
3811 if (fid != NULL) {
3812 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3813 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3814 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3815 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3816 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3817 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3818 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3819 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3820 o->long_field_put(field_offset, lval);
3821 }
3822 off += 8;
3823 break;
3824
3825 case 'D':
3826 if (fid != NULL) {
3827 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3828 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3829 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3830 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3831 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3832 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3833 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3834 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3835 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3836 o->double_field_put(field_offset, dval);
3837 }
3838 off += 8;
3839 break;
3840
3841 default:
3842 // Illegal typecode
3843 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3844 }
3845 }
3846 JVM_END
3847
3848
3849 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3850 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3851 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3852
3853 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3854 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3855 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3856 oop o = JNIHandles::resolve(obj);
3857
3858 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3859 THROW(vmSymbols::java_lang_NullPointerException());
3860 }
3861
3862 jsize nfids = fids->length();
3863 if (nfids == 0) return;
3864
3865 if (tcodes->length() < nfids) {
3866 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3867 }
3868
3869 /* loop through fields, fetching values */
3870 jsize off = 0;
3871 for (jsize i = 0; i < nfids; i++) {
3872 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3873 if (fid == NULL) {
3874 THROW(vmSymbols::java_lang_NullPointerException());
3875 }
3876 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3877
3878 switch (tcodes->char_at(i)) {
3879 case 'Z':
3880 {
3881 jboolean val = o->bool_field(field_offset);
3882 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3883 }
3884 break;
3885
3886 case 'B':
3887 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3888 break;
3889
3890 case 'C':
3891 {
3892 jchar val = o->char_field(field_offset);
3893 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3894 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3895 }
3896 break;
3897
3898 case 'S':
3899 {
3900 jshort val = o->short_field(field_offset);
3901 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3902 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3903 }
3904 break;
3905
3906 case 'I':
3907 {
3908 jint val = o->int_field(field_offset);
3909 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3910 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3911 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3912 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3913 }
3914 break;
3915
3916 case 'F':
3917 {
3918 jfloat fval = o->float_field(field_offset);
3919 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3920 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3921 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3922 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3923 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3924 }
3925 break;
3926
3927 case 'J':
3928 {
3929 jlong val = o->long_field(field_offset);
3930 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3931 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3932 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3933 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3934 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3935 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3936 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3937 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3938 }
3939 break;
3940
3941 case 'D':
3942 {
3943 jdouble dval = o->double_field(field_offset);
3944 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3945 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3946 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3947 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3948 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3949 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3950 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3951 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3952 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3953 }
3954 break;
3955
3956 default:
3957 // Illegal typecode
3958 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3959 }
3960 }
3961 JVM_END
3962
3963
3964 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3965
3966 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3967 // Security Note:
3968 // The Java level wrapper will perform the necessary security check allowing
3969 // us to pass the NULL as the initiating class loader.
3970 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3971
3972 KlassHandle klass_handle(THREAD, klass);
3973 // Check if we should initialize the class
3974 if (init && klass_handle->oop_is_instance()) {
3975 klass_handle->initialize(CHECK_NULL);
3976 }
3977 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3978 }
3979
3980
3981 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3982
3983 #ifndef PRODUCT
3984
3985 extern "C" {
3986 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3987 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3988 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3989 }
3990
3991 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3992 JVMWrapper("JVM_AccessBoolVMFlag");
3993 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3994 JVM_END
3995
3996 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3997 JVMWrapper("JVM_AccessVMIntFlag");
3998 intx v;
3999 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4000 *value = (jint)v;
4001 return result;
4002 JVM_END
4003
4004
4005 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4006 JVMWrapper("JVM_VMBreakPoint");
4007 oop the_obj = JNIHandles::resolve(obj);
4008 BREAKPOINT;
4009 JVM_END
4010
4011
4012 #endif
4013
4014
4015 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4016
4017 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4018 JVMWrapper("JVM_InvokeMethod");
4019 Handle method_handle;
4020 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4021 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4022 Handle receiver(THREAD, JNIHandles::resolve(obj));
4023 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4024 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4025 jobject res = JNIHandles::make_local(env, result);
4026 if (JvmtiExport::should_post_vm_object_alloc()) {
4027 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4028 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4029 if (java_lang_Class::is_primitive(ret_type)) {
4030 // Only for primitive type vm allocates memory for java object.
4031 // See box() method.
4032 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4033 }
4034 }
4035 return res;
4036 } else {
4037 THROW_0(vmSymbols::java_lang_StackOverflowError());
4038 }
4039 JVM_END
4040
4041
4042 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4043 JVMWrapper("JVM_NewInstanceFromConstructor");
4044 oop constructor_mirror = JNIHandles::resolve(c);
4045 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4046 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4047 jobject res = JNIHandles::make_local(env, result);
4048 if (JvmtiExport::should_post_vm_object_alloc()) {
4049 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4050 }
4051 return res;
4052 JVM_END
4053
4054 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4055
4056 JVM_LEAF(jboolean, JVM_SupportsCX8())
4057 JVMWrapper("JVM_SupportsCX8");
4058 return VM_Version::supports_cx8();
4059 JVM_END
4060
4061
4062 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4063 JVMWrapper("JVM_CX8Field");
4064 jlong res;
4065 oop o = JNIHandles::resolve(obj);
4066 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4067 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4068
4069 assert(VM_Version::supports_cx8(), "cx8 not supported");
4070 res = Atomic::cmpxchg(newVal, addr, oldVal);
4071
4072 return res == oldVal;
4073 JVM_END
4074
4075 // DTrace ///////////////////////////////////////////////////////////////////
4076
4077 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4078 JVMWrapper("JVM_DTraceGetVersion");
4079 return (jint)JVM_TRACING_DTRACE_VERSION;
4080 JVM_END
4081
4082 JVM_ENTRY(jlong,JVM_DTraceActivate(
4083 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4084 JVM_DTraceProvider* providers))
4085 JVMWrapper("JVM_DTraceActivate");
4086 return DTraceJSDT::activate(
4087 version, module_name, providers_count, providers, CHECK_0);
4088 JVM_END
4089
4090 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4091 JVMWrapper("JVM_DTraceIsProbeEnabled");
4092 return DTraceJSDT::is_probe_enabled(method);
4093 JVM_END
4094
4095 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4096 JVMWrapper("JVM_DTraceDispose");
4097 DTraceJSDT::dispose(handle);
4098 JVM_END
4099
4100 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4101 JVMWrapper("JVM_DTraceIsSupported");
4102 return DTraceJSDT::is_supported();
4103 JVM_END
4104
4105 // Returns an array of all live Thread objects (VM internal JavaThreads,
4106 // jvmti agent threads, and JNI attaching threads are skipped)
4107 // See CR 6404306 regarding JNI attaching threads
4108 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4109 ResourceMark rm(THREAD);
4110 ThreadsListEnumerator tle(THREAD, false, false);
4111 JvmtiVMObjectAllocEventCollector oam;
4112
4113 int num_threads = tle.num_threads();
4114 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4115 objArrayHandle threads_ah(THREAD, r);
4116
4117 for (int i = 0; i < num_threads; i++) {
4118 Handle h = tle.get_threadObj(i);
4119 threads_ah->obj_at_put(i, h());
4120 }
4121
4122 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4123 JVM_END
4124
4125
4126 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4127 // Return StackTraceElement[][], each element is the stack trace of a thread in
4128 // the corresponding entry in the given threads array
4129 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4130 JVMWrapper("JVM_DumpThreads");
4131 JvmtiVMObjectAllocEventCollector oam;
4132
4133 // Check if threads is null
4134 if (threads == NULL) {
4135 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4136 }
4137
4138 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4139 objArrayHandle ah(THREAD, a);
4140 int num_threads = ah->length();
4141 // check if threads is non-empty array
4142 if (num_threads == 0) {
4143 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4144 }
4145
4146 // check if threads is not an array of objects of Thread class
4147 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4148 if (k != SystemDictionary::Thread_klass()) {
4149 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4150 }
4151
4152 ResourceMark rm(THREAD);
4153
4154 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4155 for (int i = 0; i < num_threads; i++) {
4156 oop thread_obj = ah->obj_at(i);
4157 instanceHandle h(THREAD, (instanceOop) thread_obj);
4158 thread_handle_array->append(h);
4159 }
4160
4161 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4162 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4163
4164 JVM_END
4165
4166 // JVM monitoring and management support
4167 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4168 return Management::get_jmm_interface(version);
4169 JVM_END
4170
4171 // com.sun.tools.attach.VirtualMachine agent properties support
4172 //
4173 // Initialize the agent properties with the properties maintained in the VM
4174 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4175 JVMWrapper("JVM_InitAgentProperties");
4176 ResourceMark rm;
4177
4178 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4179
4180 PUTPROP(props, "sun.java.command", Arguments::java_command());
4181 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4182 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4183 return properties;
4184 JVM_END
4185
4186 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4187 {
4188 JVMWrapper("JVM_GetEnclosingMethodInfo");
4189 JvmtiVMObjectAllocEventCollector oam;
4190
4191 if (ofClass == NULL) {
4192 return NULL;
4193 }
4194 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4195 // Special handling for primitive objects
4196 if (java_lang_Class::is_primitive(mirror())) {
4197 return NULL;
4198 }
4199 klassOop k = java_lang_Class::as_klassOop(mirror());
4200 if (!Klass::cast(k)->oop_is_instance()) {
4201 return NULL;
4202 }
4203 instanceKlassHandle ik_h(THREAD, k);
4204 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4205 if (encl_method_class_idx == 0) {
4206 return NULL;
4207 }
4208 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4209 objArrayHandle dest(THREAD, dest_o);
4210 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4211 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4212 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4213 if (encl_method_method_idx != 0) {
4214 Symbol* sym = ik_h->constants()->symbol_at(
4215 extract_low_short_from_int(
4216 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4217 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4218 dest->obj_at_put(1, str());
4219 sym = ik_h->constants()->symbol_at(
4220 extract_high_short_from_int(
4221 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4222 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4223 dest->obj_at_put(2, str());
4224 }
4225 return (jobjectArray) JNIHandles::make_local(dest());
4226 }
4227 JVM_END
4228
4229 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4230 jint javaThreadState))
4231 {
4232 // If new thread states are added in future JDK and VM versions,
4233 // this should check if the JDK version is compatible with thread
4234 // states supported by the VM. Return NULL if not compatible.
4235 //
4236 // This function must map the VM java_lang_Thread::ThreadStatus
4237 // to the Java thread state that the JDK supports.
4238 //
4239
4240 typeArrayHandle values_h;
4241 switch (javaThreadState) {
4242 case JAVA_THREAD_STATE_NEW : {
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::NEW);
4246 break;
4247 }
4248 case JAVA_THREAD_STATE_RUNNABLE : {
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::RUNNABLE);
4252 break;
4253 }
4254 case JAVA_THREAD_STATE_BLOCKED : {
4255 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4256 values_h = typeArrayHandle(THREAD, r);
4257 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4258 break;
4259 }
4260 case JAVA_THREAD_STATE_WAITING : {
4261 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4262 values_h = typeArrayHandle(THREAD, r);
4263 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4264 values_h->int_at_put(1, java_lang_Thread::PARKED);
4265 break;
4266 }
4267 case JAVA_THREAD_STATE_TIMED_WAITING : {
4268 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4269 values_h = typeArrayHandle(THREAD, r);
4270 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4271 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4272 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4273 break;
4274 }
4275 case JAVA_THREAD_STATE_TERMINATED : {
4276 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4277 values_h = typeArrayHandle(THREAD, r);
4278 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4279 break;
4280 }
4281 default:
4282 // Unknown state - probably incompatible JDK version
4283 return NULL;
4284 }
4285
4286 return (jintArray) JNIHandles::make_local(env, values_h());
4287 }
4288 JVM_END
4289
4290
4291 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4292 jint javaThreadState,
4293 jintArray values))
4294 {
4295 // If new thread states are added in future JDK and VM versions,
4296 // this should check if the JDK version is compatible with thread
4297 // states supported by the VM. Return NULL if not compatible.
4298 //
4299 // This function must map the VM java_lang_Thread::ThreadStatus
4300 // to the Java thread state that the JDK supports.
4301 //
4302
4303 ResourceMark rm;
4304
4305 // Check if threads is null
4306 if (values == NULL) {
4307 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4308 }
4309
4310 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4311 typeArrayHandle values_h(THREAD, v);
4312
4313 objArrayHandle names_h;
4314 switch (javaThreadState) {
4315 case JAVA_THREAD_STATE_NEW : {
4316 assert(values_h->length() == 1 &&
4317 values_h->int_at(0) == java_lang_Thread::NEW,
4318 "Invalid threadStatus value");
4319
4320 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4321 1, /* only 1 substate */
4322 CHECK_NULL);
4323 names_h = objArrayHandle(THREAD, r);
4324 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4325 names_h->obj_at_put(0, name());
4326 break;
4327 }
4328 case JAVA_THREAD_STATE_RUNNABLE : {
4329 assert(values_h->length() == 1 &&
4330 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4331 "Invalid threadStatus value");
4332
4333 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4334 1, /* only 1 substate */
4335 CHECK_NULL);
4336 names_h = objArrayHandle(THREAD, r);
4337 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4338 names_h->obj_at_put(0, name());
4339 break;
4340 }
4341 case JAVA_THREAD_STATE_BLOCKED : {
4342 assert(values_h->length() == 1 &&
4343 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4344 "Invalid threadStatus value");
4345
4346 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4347 1, /* only 1 substate */
4348 CHECK_NULL);
4349 names_h = objArrayHandle(THREAD, r);
4350 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4351 names_h->obj_at_put(0, name());
4352 break;
4353 }
4354 case JAVA_THREAD_STATE_WAITING : {
4355 assert(values_h->length() == 2 &&
4356 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4357 values_h->int_at(1) == java_lang_Thread::PARKED,
4358 "Invalid threadStatus value");
4359 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4360 2, /* number of substates */
4361 CHECK_NULL);
4362 names_h = objArrayHandle(THREAD, r);
4363 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4364 CHECK_NULL);
4365 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4366 CHECK_NULL);
4367 names_h->obj_at_put(0, name0());
4368 names_h->obj_at_put(1, name1());
4369 break;
4370 }
4371 case JAVA_THREAD_STATE_TIMED_WAITING : {
4372 assert(values_h->length() == 3 &&
4373 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4374 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4375 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4376 "Invalid threadStatus value");
4377 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4378 3, /* number of substates */
4379 CHECK_NULL);
4380 names_h = objArrayHandle(THREAD, r);
4381 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4382 CHECK_NULL);
4383 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4384 CHECK_NULL);
4385 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4386 CHECK_NULL);
4387 names_h->obj_at_put(0, name0());
4388 names_h->obj_at_put(1, name1());
4389 names_h->obj_at_put(2, name2());
4390 break;
4391 }
4392 case JAVA_THREAD_STATE_TERMINATED : {
4393 assert(values_h->length() == 1 &&
4394 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4395 "Invalid threadStatus value");
4396 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4397 1, /* only 1 substate */
4398 CHECK_NULL);
4399 names_h = objArrayHandle(THREAD, r);
4400 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4401 names_h->obj_at_put(0, name());
4402 break;
4403 }
4404 default:
4405 // Unknown state - probably incompatible JDK version
4406 return NULL;
4407 }
4408 return (jobjectArray) JNIHandles::make_local(env, names_h());
4409 }
4410 JVM_END
4411
4412 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4413 {
4414 memset(info, 0, sizeof(info_size));
4415
4416 info->jvm_version = Abstract_VM_Version::jvm_version();
4417 info->update_version = 0; /* 0 in HotSpot Express VM */
4418 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4419
4420 // when we add a new capability in the jvm_version_info struct, we should also
4421 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4422 // counter defined in runtimeService.cpp.
4423 info->is_attachable = AttachListener::is_attach_supported();
4424 #ifdef KERNEL
4425 info->is_kernel_jvm = 1; // true;
4426 #else // KERNEL
4427 info->is_kernel_jvm = 0; // false;
4428 #endif // KERNEL
4429 }
4430 JVM_END