1 /*
2 * Copyright (c) 1997, 2010, 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/instanceKlass.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "prims/jvm.h"
38 #include "prims/jvm_misc.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiThreadState.hpp"
41 #include "prims/nativeLookup.hpp"
42 #include "prims/privilegedStack.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/dtraceJSDT.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/hpi.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 "hpi_linux.hpp"
69 # include "jvm_linux.h"
70 #endif
71 #ifdef TARGET_OS_FAMILY_solaris
72 # include "hpi_solaris.hpp"
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "hpi_windows.hpp"
77 # include "jvm_windows.h"
78 #endif
79
80 #include <errno.h>
81
82 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
83 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
84 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
85
86 /*
87 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
88 such ctors and calls MUST NOT come between an oop declaration/init and its
89 usage because if objects are move this may cause various memory stomps, bus
90 errors and segfaults. Here is a cookbook for causing so called "naked oop
91 failures":
92
93 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
94 JVMWrapper("JVM_GetClassDeclaredFields");
95
96 // Object address to be held directly in mirror & not visible to GC
97 oop mirror = JNIHandles::resolve_non_null(ofClass);
98
99 // If this ctor can hit a safepoint, moving objects around, then
100 ComplexConstructor foo;
101
102 // Boom! mirror may point to JUNK instead of the intended object
103 (some dereference of mirror)
104
105 // Here's another call that may block for GC, making mirror stale
106 MutexLocker ml(some_lock);
107
108 // And here's an initializer that can result in a stale oop
109 // all in one step.
110 oop o = call_that_can_throw_exception(TRAPS);
111
112
113 The solution is to keep the oop declaration BELOW the ctor or function
114 call that might cause a GC, do another resolve to reassign the oop, or
115 consider use of a Handle instead of an oop so there is immunity from object
116 motion. But note that the "QUICK" entries below do not have a handlemark
117 and thus can only support use of handles passed in.
118 */
119
120 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
121 ResourceMark rm;
122 int line_number = -1;
123 const char * source_file = NULL;
124 const char * trace = "explicit";
125 klassOop caller = NULL;
126 JavaThread* jthread = JavaThread::current();
127 if (jthread->has_last_Java_frame()) {
128 vframeStream vfst(jthread);
129
130 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
131 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK);
132 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
133 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK);
134 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
135
136 methodOop last_caller = NULL;
137
138 while (!vfst.at_end()) {
139 methodOop m = vfst.method();
140 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
141 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
142 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
143 break;
144 }
145 last_caller = m;
146 vfst.next();
147 }
148 // if this is called from Class.forName0 and that is called from Class.forName,
149 // then print the caller of Class.forName. If this is Class.loadClass, then print
150 // that caller, otherwise keep quiet since this should be picked up elsewhere.
151 bool found_it = false;
152 if (!vfst.at_end() &&
153 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
154 vfst.method()->name() == vmSymbols::forName0_name()) {
155 vfst.next();
156 if (!vfst.at_end() &&
157 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName_name()) {
159 vfst.next();
160 found_it = true;
161 }
162 } else if (last_caller != NULL &&
163 instanceKlass::cast(last_caller->method_holder())->name() ==
164 vmSymbols::java_lang_ClassLoader() &&
165 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
166 last_caller->name() == vmSymbols::loadClass_name())) {
167 found_it = true;
168 } else if (!vfst.at_end()) {
169 if (vfst.method()->is_native()) {
170 // JNI call
171 found_it = true;
172 }
173 }
174 if (found_it && !vfst.at_end()) {
175 // found the caller
176 caller = vfst.method()->method_holder();
177 line_number = vfst.method()->line_number_from_bci(vfst.bci());
178 if (line_number == -1) {
179 // show method name if it's a native method
180 trace = vfst.method()->name_and_sig_as_C_string();
181 }
182 symbolOop s = instanceKlass::cast(caller)->source_file_name();
183 if (s != NULL) {
184 source_file = s->as_C_string();
185 }
186 }
187 }
188 if (caller != NULL) {
189 if (to_class != caller) {
190 const char * from = Klass::cast(caller)->external_name();
191 const char * to = Klass::cast(to_class)->external_name();
192 // print in a single call to reduce interleaving between threads
193 if (source_file != NULL) {
194 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
195 } else {
196 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
197 }
198 }
199 }
200 }
201
202 void trace_class_resolution(klassOop to_class) {
203 EXCEPTION_MARK;
204 trace_class_resolution_impl(to_class, THREAD);
205 if (HAS_PENDING_EXCEPTION) {
206 CLEAR_PENDING_EXCEPTION;
207 }
208 }
209
210 // Wrapper to trace JVM functions
211
212 #ifdef ASSERT
213 class JVMTraceWrapper : public StackObj {
214 public:
215 JVMTraceWrapper(const char* format, ...) {
216 if (TraceJVMCalls) {
217 va_list ap;
218 va_start(ap, format);
219 tty->print("JVM ");
220 tty->vprint_cr(format, ap);
221 va_end(ap);
222 }
223 }
224 };
225
226 Histogram* JVMHistogram;
227 volatile jint JVMHistogram_lock = 0;
228
229 class JVMHistogramElement : public HistogramElement {
230 public:
231 JVMHistogramElement(const char* name);
232 };
233
234 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
235 _name = elementName;
236 uintx count = 0;
237
238 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
239 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
240 count +=1;
241 if ( (WarnOnStalledSpinLock > 0)
242 && (count % WarnOnStalledSpinLock == 0)) {
243 warning("JVMHistogram_lock seems to be stalled");
244 }
245 }
246 }
247
248 if(JVMHistogram == NULL)
249 JVMHistogram = new Histogram("JVM Call Counts",100);
250
251 JVMHistogram->add_element(this);
252 Atomic::dec(&JVMHistogram_lock);
253 }
254
255 #define JVMCountWrapper(arg) \
256 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
257 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
258
259 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
260 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
261 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
262 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
263 #else
264 #define JVMWrapper(arg1)
265 #define JVMWrapper2(arg1, arg2)
266 #define JVMWrapper3(arg1, arg2, arg3)
267 #define JVMWrapper4(arg1, arg2, arg3, arg4)
268 #endif
269
270
271 // Interface version /////////////////////////////////////////////////////////////////////
272
273
274 JVM_LEAF(jint, JVM_GetInterfaceVersion())
275 return JVM_INTERFACE_VERSION;
276 JVM_END
277
278
279 // java.lang.System //////////////////////////////////////////////////////////////////////
280
281
282 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
283 JVMWrapper("JVM_CurrentTimeMillis");
284 return os::javaTimeMillis();
285 JVM_END
286
287 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
288 JVMWrapper("JVM_NanoTime");
289 return os::javaTimeNanos();
290 JVM_END
291
292
293 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
294 jobject dst, jint dst_pos, jint length))
295 JVMWrapper("JVM_ArrayCopy");
296 // Check if we have null pointers
297 if (src == NULL || dst == NULL) {
298 THROW(vmSymbols::java_lang_NullPointerException());
299 }
300 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
301 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
302 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
303 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
304 // Do copy
305 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
306 JVM_END
307
308
309 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
310 JavaValue r(T_OBJECT);
311 // public synchronized Object put(Object key, Object value);
312 HandleMark hm(THREAD);
313 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
314 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
315 JavaCalls::call_virtual(&r,
316 props,
317 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
318 vmSymbolHandles::put_name(),
319 vmSymbolHandles::object_object_object_signature(),
320 key_str,
321 value_str,
322 THREAD);
323 }
324
325
326 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
327
328
329 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
330 JVMWrapper("JVM_InitProperties");
331 ResourceMark rm;
332
333 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
334
335 // System property list includes both user set via -D option and
336 // jvm system specific properties.
337 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
338 PUTPROP(props, p->key(), p->value());
339 }
340
341 // Convert the -XX:MaxDirectMemorySize= command line flag
342 // to the sun.nio.MaxDirectMemorySize property.
343 // Do this after setting user properties to prevent people
344 // from setting the value with a -D option, as requested.
345 {
346 char as_chars[256];
347 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
348 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
349 }
350
351 // JVM monitoring and management support
352 // Add the sun.management.compiler property for the compiler's name
353 {
354 #undef CSIZE
355 #if defined(_LP64) || defined(_WIN64)
356 #define CSIZE "64-Bit "
357 #else
358 #define CSIZE
359 #endif // 64bit
360
361 #ifdef TIERED
362 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
363 #else
364 #if defined(COMPILER1)
365 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
366 #elif defined(COMPILER2)
367 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
368 #else
369 const char* compiler_name = "";
370 #endif // compilers
371 #endif // TIERED
372
373 if (*compiler_name != '\0' &&
374 (Arguments::mode() != Arguments::_int)) {
375 PUTPROP(props, "sun.management.compiler", compiler_name);
376 }
377 }
378
379 return properties;
380 JVM_END
381
382
383 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
384
385 extern volatile jint vm_created;
386
387 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
388 if (vm_created != 0 && (code == 0)) {
389 // The VM is about to exit. We call back into Java to check whether finalizers should be run
390 Universe::run_finalizers_on_exit();
391 }
392 before_exit(thread);
393 vm_exit(code);
394 JVM_END
395
396
397 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
398 before_exit(thread);
399 vm_exit(code);
400 JVM_END
401
402
403 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
404 register_on_exit_function(func);
405 JVM_END
406
407
408 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
409 JVMWrapper("JVM_GC");
410 if (!DisableExplicitGC) {
411 Universe::heap()->collect(GCCause::_java_lang_system_gc);
412 }
413 JVM_END
414
415
416 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
417 JVMWrapper("JVM_MaxObjectInspectionAge");
418 return Universe::heap()->millis_since_last_gc();
419 JVM_END
420
421
422 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
423 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
424 JVM_END
425
426
427 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
428 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
429 JVM_END
430
431 static inline jlong convert_size_t_to_jlong(size_t val) {
432 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
433 NOT_LP64 (return (jlong)val;)
434 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
435 }
436
437 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
438 JVMWrapper("JVM_TotalMemory");
439 size_t n = Universe::heap()->capacity();
440 return convert_size_t_to_jlong(n);
441 JVM_END
442
443
444 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
445 JVMWrapper("JVM_FreeMemory");
446 CollectedHeap* ch = Universe::heap();
447 size_t n;
448 {
449 MutexLocker x(Heap_lock);
450 n = ch->capacity() - ch->used();
451 }
452 return convert_size_t_to_jlong(n);
453 JVM_END
454
455
456 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
457 JVMWrapper("JVM_MaxMemory");
458 size_t n = Universe::heap()->max_capacity();
459 return convert_size_t_to_jlong(n);
460 JVM_END
461
462
463 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
464 JVMWrapper("JVM_ActiveProcessorCount");
465 return os::active_processor_count();
466 JVM_END
467
468
469
470 // java.lang.Throwable //////////////////////////////////////////////////////
471
472
473 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
474 JVMWrapper("JVM_FillInStackTrace");
475 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
476 java_lang_Throwable::fill_in_stack_trace(exception);
477 JVM_END
478
479
480 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
481 JVMWrapper("JVM_PrintStackTrace");
482 // Note: This is no longer used in Merlin, but we still support it for compatibility.
483 oop exception = JNIHandles::resolve_non_null(receiver);
484 oop stream = JNIHandles::resolve_non_null(printable);
485 java_lang_Throwable::print_stack_trace(exception, stream);
486 JVM_END
487
488
489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
490 JVMWrapper("JVM_GetStackTraceDepth");
491 oop exception = JNIHandles::resolve(throwable);
492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
493 JVM_END
494
495
496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
497 JVMWrapper("JVM_GetStackTraceElement");
498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
499 oop exception = JNIHandles::resolve(throwable);
500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
501 return JNIHandles::make_local(env, element);
502 JVM_END
503
504
505 // java.lang.Object ///////////////////////////////////////////////
506
507
508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
509 JVMWrapper("JVM_IHashCode");
510 // as implemented in the classic virtual machine; return 0 if object is NULL
511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
512 JVM_END
513
514
515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
516 JVMWrapper("JVM_MonitorWait");
517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
518 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
519 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
520 if (JvmtiExport::should_post_monitor_wait()) {
521 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
522 }
523 ObjectSynchronizer::wait(obj, ms, CHECK);
524 JVM_END
525
526
527 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
528 JVMWrapper("JVM_MonitorNotify");
529 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
530 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
531 ObjectSynchronizer::notify(obj, CHECK);
532 JVM_END
533
534
535 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
536 JVMWrapper("JVM_MonitorNotifyAll");
537 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
538 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
539 ObjectSynchronizer::notifyall(obj, CHECK);
540 JVM_END
541
542
543 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
544 JVMWrapper("JVM_Clone");
545 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
546 const KlassHandle klass (THREAD, obj->klass());
547 JvmtiVMObjectAllocEventCollector oam;
548
549 #ifdef ASSERT
550 // Just checking that the cloneable flag is set correct
551 if (obj->is_javaArray()) {
552 guarantee(klass->is_cloneable(), "all arrays are cloneable");
553 } else {
554 guarantee(obj->is_instance(), "should be instanceOop");
555 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
556 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
557 }
558 #endif
559
560 // Check if class of obj supports the Cloneable interface.
561 // All arrays are considered to be cloneable (See JLS 20.1.5)
562 if (!klass->is_cloneable()) {
563 ResourceMark rm(THREAD);
564 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
565 }
566
567 // Make shallow object copy
568 const int size = obj->size();
569 oop new_obj = NULL;
570 if (obj->is_javaArray()) {
571 const int length = ((arrayOop)obj())->length();
572 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
573 } else {
574 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
575 }
576 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
577 // is modifying a reference field in the clonee, a non-oop-atomic copy might
578 // be suspended in the middle of copying the pointer and end up with parts
579 // of two different pointers in the field. Subsequent dereferences will crash.
580 // 4846409: an oop-copy of objects with long or double fields or arrays of same
581 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
582 // of oops. We know objects are aligned on a minimum of an jlong boundary.
583 // The same is true of StubRoutines::object_copy and the various oop_copy
584 // variants, and of the code generated by the inline_native_clone intrinsic.
585 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
586 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
587 (size_t)align_object_size(size) / HeapWordsPerLong);
588 // Clear the header
589 new_obj->init_mark();
590
591 // Store check (mark entire object and let gc sort it out)
592 BarrierSet* bs = Universe::heap()->barrier_set();
593 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
594 bs->write_region(MemRegion((HeapWord*)new_obj, size));
595
596 // Caution: this involves a java upcall, so the clone should be
597 // "gc-robust" by this stage.
598 if (klass->has_finalizer()) {
599 assert(obj->is_instance(), "should be instanceOop");
600 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
601 }
602
603 return JNIHandles::make_local(env, oop(new_obj));
604 JVM_END
605
606 // java.lang.Compiler ////////////////////////////////////////////////////
607
608 // The initial cuts of the HotSpot VM will not support JITs, and all existing
609 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
610 // functions are all silently ignored unless JVM warnings are printed.
611
612 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
613 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
614 JVM_END
615
616
617 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
618 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
619 return JNI_FALSE;
620 JVM_END
621
622
623 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
624 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
625 return JNI_FALSE;
626 JVM_END
627
628
629 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
630 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
631 return JNI_FALSE;
632 JVM_END
633
634
635 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
636 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
637 return NULL;
638 JVM_END
639
640
641 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
642 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
643 JVM_END
644
645
646 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
647 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
648 JVM_END
649
650
651
652 // Error message support //////////////////////////////////////////////////////
653
654 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
655 JVMWrapper("JVM_GetLastErrorString");
656 return hpi::lasterror(buf, len);
657 JVM_END
658
659
660 // java.io.File ///////////////////////////////////////////////////////////////
661
662 JVM_LEAF(char*, JVM_NativePath(char* path))
663 JVMWrapper2("JVM_NativePath (%s)", path);
664 return hpi::native_path(path);
665 JVM_END
666
667
668 // Misc. class handling ///////////////////////////////////////////////////////////
669
670
671 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
672 JVMWrapper("JVM_GetCallerClass");
673 klassOop k = thread->security_get_caller_class(depth);
674 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
675 JVM_END
676
677
678 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
679 JVMWrapper("JVM_FindPrimitiveClass");
680 oop mirror = NULL;
681 BasicType t = name2type(utf);
682 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
683 mirror = Universe::java_mirror(t);
684 }
685 if (mirror == NULL) {
686 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
687 } else {
688 return (jclass) JNIHandles::make_local(env, mirror);
689 }
690 JVM_END
691
692
693 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
694 JVMWrapper("JVM_ResolveClass");
695 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
696 JVM_END
697
698
699 // Returns a class loaded by the bootstrap class loader; or null
700 // if not found. ClassNotFoundException is not thrown.
701 //
702 // Rationale behind JVM_FindClassFromBootLoader
703 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
704 // b> because of (a) java.dll has a direct dependecy on the unexported
705 // private symbol "_JVM_FindClassFromClassLoader@20".
706 // c> the launcher cannot use the private symbol as it dynamically opens
707 // the entry point, so if something changes, the launcher will fail
708 // unexpectedly at runtime, it is safest for the launcher to dlopen a
709 // stable exported interface.
710 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
711 // signature to change from _JVM_FindClassFromClassLoader@20 to
712 // JVM_FindClassFromClassLoader and will not be backward compatible
713 // with older JDKs.
714 // Thus a public/stable exported entry point is the right solution,
715 // public here means public in linker semantics, and is exported only
716 // to the JDK, and is not intended to be a public API.
717
718 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
719 const char* name))
720 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
721
722 // Java libraries should ensure that name is never null...
723 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
724 // It's impossible to create this class; the name cannot fit
725 // into the constant pool.
726 return NULL;
727 }
728
729 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
730 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
731 if (k == NULL) {
732 return NULL;
733 }
734
735 if (TraceClassResolution) {
736 trace_class_resolution(k);
737 }
738 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
739 JVM_END
740
741 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
742 jboolean init, jobject loader,
743 jboolean throwError))
744 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
745 throwError ? "error" : "exception");
746 // Java libraries should ensure that name is never null...
747 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
748 // It's impossible to create this class; the name cannot fit
749 // into the constant pool.
750 if (throwError) {
751 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
752 } else {
753 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
754 }
755 }
756 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
757 Handle h_loader(THREAD, JNIHandles::resolve(loader));
758 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
759 Handle(), throwError, THREAD);
760
761 if (TraceClassResolution && result != NULL) {
762 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
763 }
764 return result;
765 JVM_END
766
767
768 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
769 jboolean init, jclass from))
770 JVMWrapper2("JVM_FindClassFromClass %s", name);
771 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
772 // It's impossible to create this class; the name cannot fit
773 // into the constant pool.
774 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
775 }
776 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
777 oop from_class_oop = JNIHandles::resolve(from);
778 klassOop from_class = (from_class_oop == NULL)
779 ? (klassOop)NULL
780 : java_lang_Class::as_klassOop(from_class_oop);
781 oop class_loader = NULL;
782 oop protection_domain = NULL;
783 if (from_class != NULL) {
784 class_loader = Klass::cast(from_class)->class_loader();
785 protection_domain = Klass::cast(from_class)->protection_domain();
786 }
787 Handle h_loader(THREAD, class_loader);
788 Handle h_prot (THREAD, protection_domain);
789 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
790 h_prot, true, thread);
791
792 if (TraceClassResolution && result != NULL) {
793 // this function is generally only used for class loading during verification.
794 ResourceMark rm;
795 oop from_mirror = JNIHandles::resolve_non_null(from);
796 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
797 const char * from_name = Klass::cast(from_class)->external_name();
798
799 oop mirror = JNIHandles::resolve_non_null(result);
800 klassOop to_class = java_lang_Class::as_klassOop(mirror);
801 const char * to = Klass::cast(to_class)->external_name();
802 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
803 }
804
805 return result;
806 JVM_END
807
808 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
809 if (loader.is_null()) {
810 return;
811 }
812
813 // check whether the current caller thread holds the lock or not.
814 // If not, increment the corresponding counter
815 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
816 ObjectSynchronizer::owner_self) {
817 counter->inc();
818 }
819 }
820
821 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
822 // and JVM_DefineClassWithSourceCond()
823 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
824 jobject loader, const jbyte *buf,
825 jsize len, jobject pd, const char *source,
826 jboolean verify, TRAPS) {
827 if (source == NULL) source = "__JVM_DefineClass__";
828
829 assert(THREAD->is_Java_thread(), "must be a JavaThread");
830 JavaThread* jt = (JavaThread*) THREAD;
831
832 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
833 ClassLoader::perf_define_appclass_selftime(),
834 ClassLoader::perf_define_appclasses(),
835 jt->get_thread_stat()->perf_recursion_counts_addr(),
836 jt->get_thread_stat()->perf_timers_addr(),
837 PerfClassTraceTime::DEFINE_CLASS);
838
839 if (UsePerfData) {
840 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
841 }
842
843 // Since exceptions can be thrown, class initialization can take place
844 // if name is NULL no check for class name in .class stream has to be made.
845 symbolHandle class_name;
846 if (name != NULL) {
847 const int str_len = (int)strlen(name);
848 if (str_len > symbolOopDesc::max_length()) {
849 // It's impossible to create this class; the name cannot fit
850 // into the constant pool.
851 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
852 }
853 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
854 }
855
856 ResourceMark rm(THREAD);
857 ClassFileStream st((u1*) buf, len, (char *)source);
858 Handle class_loader (THREAD, JNIHandles::resolve(loader));
859 if (UsePerfData) {
860 is_lock_held_by_thread(class_loader,
861 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
862 THREAD);
863 }
864 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
865 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
866 protection_domain, &st,
867 verify != 0,
868 CHECK_NULL);
869
870 if (TraceClassResolution && k != NULL) {
871 trace_class_resolution(k);
872 }
873
874 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
875 }
876
877
878 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
879 JVMWrapper2("JVM_DefineClass %s", name);
880
881 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
882 JVM_END
883
884
885 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
886 JVMWrapper2("JVM_DefineClassWithSource %s", name);
887
888 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
889 JVM_END
890
891 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
892 jobject loader, const jbyte *buf,
893 jsize len, jobject pd,
894 const char *source, jboolean verify))
895 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
896
897 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
898 JVM_END
899
900 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
901 JVMWrapper("JVM_FindLoadedClass");
902 ResourceMark rm(THREAD);
903
904 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
905 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
906
907 const char* str = java_lang_String::as_utf8_string(string());
908 // Sanity check, don't expect null
909 if (str == NULL) return NULL;
910
911 const int str_len = (int)strlen(str);
912 if (str_len > symbolOopDesc::max_length()) {
913 // It's impossible to create this class; the name cannot fit
914 // into the constant pool.
915 return NULL;
916 }
917 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
918
919 // Security Note:
920 // The Java level wrapper will perform the necessary security check allowing
921 // us to pass the NULL as the initiating class loader.
922 Handle h_loader(THREAD, JNIHandles::resolve(loader));
923 if (UsePerfData) {
924 is_lock_held_by_thread(h_loader,
925 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
926 THREAD);
927 }
928
929 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
930 h_loader,
931 Handle(),
932 CHECK_NULL);
933
934 return (k == NULL) ? NULL :
935 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
936 JVM_END
937
938
939 // Reflection support //////////////////////////////////////////////////////////////////////////////
940
941 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
942 assert (cls != NULL, "illegal class");
943 JVMWrapper("JVM_GetClassName");
944 JvmtiVMObjectAllocEventCollector oam;
945 ResourceMark rm(THREAD);
946 const char* name;
947 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
948 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
949 } else {
950 // Consider caching interned string in Klass
951 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
952 assert(k->is_klass(), "just checking");
953 name = Klass::cast(k)->external_name();
954 }
955 oop result = StringTable::intern((char*) name, CHECK_NULL);
956 return (jstring) JNIHandles::make_local(env, result);
957 JVM_END
958
959
960 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
961 JVMWrapper("JVM_GetClassInterfaces");
962 JvmtiVMObjectAllocEventCollector oam;
963 oop mirror = JNIHandles::resolve_non_null(cls);
964
965 // Special handling for primitive objects
966 if (java_lang_Class::is_primitive(mirror)) {
967 // Primitive objects does not have any interfaces
968 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
969 return (jobjectArray) JNIHandles::make_local(env, r);
970 }
971
972 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
973 // Figure size of result array
974 int size;
975 if (klass->oop_is_instance()) {
976 size = instanceKlass::cast(klass())->local_interfaces()->length();
977 } else {
978 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
979 size = 2;
980 }
981
982 // Allocate result array
983 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
984 objArrayHandle result (THREAD, r);
985 // Fill in result
986 if (klass->oop_is_instance()) {
987 // Regular instance klass, fill in all local interfaces
988 for (int index = 0; index < size; index++) {
989 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
990 result->obj_at_put(index, Klass::cast(k)->java_mirror());
991 }
992 } else {
993 // All arrays implement java.lang.Cloneable and java.io.Serializable
994 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
995 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
996 }
997 return (jobjectArray) JNIHandles::make_local(env, result());
998 JVM_END
999
1000
1001 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1002 JVMWrapper("JVM_GetClassLoader");
1003 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1004 return NULL;
1005 }
1006 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1007 oop loader = Klass::cast(k)->class_loader();
1008 return JNIHandles::make_local(env, loader);
1009 JVM_END
1010
1011
1012 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1013 JVMWrapper("JVM_IsInterface");
1014 oop mirror = JNIHandles::resolve_non_null(cls);
1015 if (java_lang_Class::is_primitive(mirror)) {
1016 return JNI_FALSE;
1017 }
1018 klassOop k = java_lang_Class::as_klassOop(mirror);
1019 jboolean result = Klass::cast(k)->is_interface();
1020 assert(!result || Klass::cast(k)->oop_is_instance(),
1021 "all interfaces are instance types");
1022 // The compiler intrinsic for isInterface tests the
1023 // Klass::_access_flags bits in the same way.
1024 return result;
1025 JVM_END
1026
1027
1028 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1029 JVMWrapper("JVM_GetClassSigners");
1030 JvmtiVMObjectAllocEventCollector oam;
1031 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1032 // There are no signers for primitive types
1033 return NULL;
1034 }
1035
1036 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1037 objArrayOop signers = NULL;
1038 if (Klass::cast(k)->oop_is_instance()) {
1039 signers = instanceKlass::cast(k)->signers();
1040 }
1041
1042 // If there are no signers set in the class, or if the class
1043 // is an array, return NULL.
1044 if (signers == NULL) return NULL;
1045
1046 // copy of the signers array
1047 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1048 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1049 for (int index = 0; index < signers->length(); index++) {
1050 signers_copy->obj_at_put(index, signers->obj_at(index));
1051 }
1052
1053 // return the copy
1054 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1055 JVM_END
1056
1057
1058 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1059 JVMWrapper("JVM_SetClassSigners");
1060 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1061 // This call is ignored for primitive types and arrays.
1062 // Signers are only set once, ClassLoader.java, and thus shouldn't
1063 // be called with an array. Only the bootstrap loader creates arrays.
1064 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1065 if (Klass::cast(k)->oop_is_instance()) {
1066 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1067 }
1068 }
1069 JVM_END
1070
1071
1072 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1073 JVMWrapper("JVM_GetProtectionDomain");
1074 if (JNIHandles::resolve(cls) == NULL) {
1075 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1076 }
1077
1078 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1079 // Primitive types does not have a protection domain.
1080 return NULL;
1081 }
1082
1083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1084 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1085 JVM_END
1086
1087
1088 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1089 // still defined in core libraries as of 1.5.
1090 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1091 JVMWrapper("JVM_SetProtectionDomain");
1092 if (JNIHandles::resolve(cls) == NULL) {
1093 THROW(vmSymbols::java_lang_NullPointerException());
1094 }
1095 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1096 // Call is ignored for primitive types
1097 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1098
1099 // cls won't be an array, as this called only from ClassLoader.defineClass
1100 if (Klass::cast(k)->oop_is_instance()) {
1101 oop pd = JNIHandles::resolve(protection_domain);
1102 assert(pd == NULL || pd->is_oop(), "just checking");
1103 instanceKlass::cast(k)->set_protection_domain(pd);
1104 }
1105 }
1106 JVM_END
1107
1108
1109 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1110 JVMWrapper("JVM_DoPrivileged");
1111
1112 if (action == NULL) {
1113 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1114 }
1115
1116 // Stack allocated list of privileged stack elements
1117 PrivilegedElement pi;
1118
1119 // Check that action object understands "Object run()"
1120 Handle object (THREAD, JNIHandles::resolve(action));
1121
1122 // get run() method
1123 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1124 vmSymbols::run_method_name(),
1125 vmSymbols::void_object_signature());
1126 methodHandle m (THREAD, m_oop);
1127 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1128 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1129 }
1130
1131 // Compute the frame initiating the do privileged operation and setup the privileged stack
1132 vframeStream vfst(thread);
1133 vfst.security_get_caller_frame(1);
1134
1135 if (!vfst.at_end()) {
1136 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1137 thread->set_privileged_stack_top(&pi);
1138 }
1139
1140
1141 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1142 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1143 Handle pending_exception;
1144 JavaValue result(T_OBJECT);
1145 JavaCallArguments args(object);
1146 JavaCalls::call(&result, m, &args, THREAD);
1147
1148 // done with action, remove ourselves from the list
1149 if (!vfst.at_end()) {
1150 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1151 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1152 }
1153
1154 if (HAS_PENDING_EXCEPTION) {
1155 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1156 CLEAR_PENDING_EXCEPTION;
1157
1158 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1159 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1160 // Throw a java.security.PrivilegedActionException(Exception e) exception
1161 JavaCallArguments args(pending_exception);
1162 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1163 vmSymbolHandles::exception_void_signature(),
1164 &args);
1165 }
1166 }
1167
1168 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1169 return JNIHandles::make_local(env, (oop) result.get_jobject());
1170 JVM_END
1171
1172
1173 // Returns the inherited_access_control_context field of the running thread.
1174 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1175 JVMWrapper("JVM_GetInheritedAccessControlContext");
1176 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1177 return JNIHandles::make_local(env, result);
1178 JVM_END
1179
1180 class RegisterArrayForGC {
1181 private:
1182 JavaThread *_thread;
1183 public:
1184 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1185 _thread = thread;
1186 _thread->register_array_for_gc(array);
1187 }
1188
1189 ~RegisterArrayForGC() {
1190 _thread->register_array_for_gc(NULL);
1191 }
1192 };
1193
1194
1195 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1196 JVMWrapper("JVM_GetStackAccessControlContext");
1197 if (!UsePrivilegedStack) return NULL;
1198
1199 ResourceMark rm(THREAD);
1200 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1201 JvmtiVMObjectAllocEventCollector oam;
1202
1203 // count the protection domains on the execution stack. We collapse
1204 // duplicate consecutive protection domains into a single one, as
1205 // well as stopping when we hit a privileged frame.
1206
1207 // Use vframeStream to iterate through Java frames
1208 vframeStream vfst(thread);
1209
1210 oop previous_protection_domain = NULL;
1211 Handle privileged_context(thread, NULL);
1212 bool is_privileged = false;
1213 oop protection_domain = NULL;
1214
1215 for(; !vfst.at_end(); vfst.next()) {
1216 // get method of frame
1217 methodOop method = vfst.method();
1218 intptr_t* frame_id = vfst.frame_id();
1219
1220 // check the privileged frames to see if we have a match
1221 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1222 // this frame is privileged
1223 is_privileged = true;
1224 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1225 protection_domain = thread->privileged_stack_top()->protection_domain();
1226 } else {
1227 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1228 }
1229
1230 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1231 local_array->push(protection_domain);
1232 previous_protection_domain = protection_domain;
1233 }
1234
1235 if (is_privileged) break;
1236 }
1237
1238
1239 // either all the domains on the stack were system domains, or
1240 // we had a privileged system domain
1241 if (local_array->is_empty()) {
1242 if (is_privileged && privileged_context.is_null()) return NULL;
1243
1244 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1245 return JNIHandles::make_local(env, result);
1246 }
1247
1248 // the resource area must be registered in case of a gc
1249 RegisterArrayForGC ragc(thread, local_array);
1250 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1251 local_array->length(), CHECK_NULL);
1252 objArrayHandle h_context(thread, context);
1253 for (int index = 0; index < local_array->length(); index++) {
1254 h_context->obj_at_put(index, local_array->at(index));
1255 }
1256
1257 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1258
1259 return JNIHandles::make_local(env, result);
1260 JVM_END
1261
1262
1263 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1264 JVMWrapper("JVM_IsArrayClass");
1265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1266 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1267 JVM_END
1268
1269
1270 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1271 JVMWrapper("JVM_IsPrimitiveClass");
1272 oop mirror = JNIHandles::resolve_non_null(cls);
1273 return (jboolean) java_lang_Class::is_primitive(mirror);
1274 JVM_END
1275
1276
1277 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1278 JVMWrapper("JVM_GetComponentType");
1279 oop mirror = JNIHandles::resolve_non_null(cls);
1280 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1281 return (jclass) JNIHandles::make_local(env, result);
1282 JVM_END
1283
1284
1285 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1286 JVMWrapper("JVM_GetClassModifiers");
1287 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1288 // Primitive type
1289 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1290 }
1291
1292 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1293 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1294 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1295 return k->modifier_flags();
1296 JVM_END
1297
1298
1299 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1300
1301 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1302 const int inner_class_info_index = 0;
1303 const int outer_class_info_index = 1;
1304
1305 JvmtiVMObjectAllocEventCollector oam;
1306 // ofClass is a reference to a java_lang_Class object. The mirror object
1307 // of an instanceKlass
1308
1309 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1310 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1311 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1312 return (jobjectArray)JNIHandles::make_local(env, result);
1313 }
1314
1315 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1316
1317 if (k->inner_classes()->length() == 0) {
1318 // Neither an inner nor outer class
1319 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1320 return (jobjectArray)JNIHandles::make_local(env, result);
1321 }
1322
1323 // find inner class info
1324 typeArrayHandle icls(thread, k->inner_classes());
1325 constantPoolHandle cp(thread, k->constants());
1326 int length = icls->length();
1327
1328 // Allocate temp. result array
1329 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1330 objArrayHandle result (THREAD, r);
1331 int members = 0;
1332
1333 for(int i = 0; i < length; i += 4) {
1334 int ioff = icls->ushort_at(i + inner_class_info_index);
1335 int ooff = icls->ushort_at(i + outer_class_info_index);
1336
1337 if (ioff != 0 && ooff != 0) {
1338 // Check to see if the name matches the class we're looking for
1339 // before attempting to find the class.
1340 if (cp->klass_name_at_matches(k, ooff)) {
1341 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1342 if (outer_klass == k()) {
1343 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1344 instanceKlassHandle inner_klass (THREAD, ik);
1345
1346 // Throws an exception if outer klass has not declared k as
1347 // an inner klass
1348 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1349
1350 result->obj_at_put(members, inner_klass->java_mirror());
1351 members++;
1352 }
1353 }
1354 }
1355 }
1356
1357 if (members != length) {
1358 // Return array of right length
1359 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1360 for(int i = 0; i < members; i++) {
1361 res->obj_at_put(i, result->obj_at(i));
1362 }
1363 return (jobjectArray)JNIHandles::make_local(env, res);
1364 }
1365
1366 return (jobjectArray)JNIHandles::make_local(env, result());
1367 JVM_END
1368
1369
1370 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1371 {
1372 // ofClass is a reference to a java_lang_Class object.
1373 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1374 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1375 return NULL;
1376 }
1377
1378 bool inner_is_member = false;
1379 klassOop outer_klass
1380 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1381 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1382 if (outer_klass == NULL) return NULL; // already a top-level class
1383 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1384 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1385 }
1386 JVM_END
1387
1388 // should be in instanceKlass.cpp, but is here for historical reasons
1389 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1390 bool* inner_is_member,
1391 TRAPS) {
1392 Thread* thread = THREAD;
1393 const int inner_class_info_index = inner_class_inner_class_info_offset;
1394 const int outer_class_info_index = inner_class_outer_class_info_offset;
1395
1396 if (k->inner_classes()->length() == 0) {
1397 // No inner class info => no declaring class
1398 return NULL;
1399 }
1400
1401 typeArrayHandle i_icls(thread, k->inner_classes());
1402 constantPoolHandle i_cp(thread, k->constants());
1403 int i_length = i_icls->length();
1404
1405 bool found = false;
1406 klassOop ok;
1407 instanceKlassHandle outer_klass;
1408 *inner_is_member = false;
1409
1410 // Find inner_klass attribute
1411 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1412 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1413 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1414 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1415 if (ioff != 0) {
1416 // Check to see if the name matches the class we're looking for
1417 // before attempting to find the class.
1418 if (i_cp->klass_name_at_matches(k, ioff)) {
1419 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1420 found = (k() == inner_klass);
1421 if (found && ooff != 0) {
1422 ok = i_cp->klass_at(ooff, CHECK_NULL);
1423 outer_klass = instanceKlassHandle(thread, ok);
1424 *inner_is_member = true;
1425 }
1426 }
1427 }
1428 }
1429
1430 if (found && outer_klass.is_null()) {
1431 // It may be anonymous; try for that.
1432 int encl_method_class_idx = k->enclosing_method_class_index();
1433 if (encl_method_class_idx != 0) {
1434 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1435 outer_klass = instanceKlassHandle(thread, ok);
1436 *inner_is_member = false;
1437 }
1438 }
1439
1440 // If no inner class attribute found for this class.
1441 if (outer_klass.is_null()) return NULL;
1442
1443 // Throws an exception if outer klass has not declared k as an inner klass
1444 // We need evidence that each klass knows about the other, or else
1445 // the system could allow a spoof of an inner class to gain access rights.
1446 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1447 return outer_klass();
1448 }
1449
1450 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1451 assert (cls != NULL, "illegal class");
1452 JVMWrapper("JVM_GetClassSignature");
1453 JvmtiVMObjectAllocEventCollector oam;
1454 ResourceMark rm(THREAD);
1455 // Return null for arrays and primatives
1456 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1457 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1458 if (Klass::cast(k)->oop_is_instance()) {
1459 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1460 if (sym.is_null()) return NULL;
1461 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1462 return (jstring) JNIHandles::make_local(env, str());
1463 }
1464 }
1465 return NULL;
1466 JVM_END
1467
1468
1469 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1470 assert (cls != NULL, "illegal class");
1471 JVMWrapper("JVM_GetClassAnnotations");
1472 ResourceMark rm(THREAD);
1473 // Return null for arrays and primitives
1474 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1475 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1476 if (Klass::cast(k)->oop_is_instance()) {
1477 return (jbyteArray) JNIHandles::make_local(env,
1478 instanceKlass::cast(k)->class_annotations());
1479 }
1480 }
1481 return NULL;
1482 JVM_END
1483
1484
1485 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1486 assert(field != NULL, "illegal field");
1487 JVMWrapper("JVM_GetFieldAnnotations");
1488
1489 // some of this code was adapted from from jni_FromReflectedField
1490
1491 // field is a handle to a java.lang.reflect.Field object
1492 oop reflected = JNIHandles::resolve_non_null(field);
1493 oop mirror = java_lang_reflect_Field::clazz(reflected);
1494 klassOop k = java_lang_Class::as_klassOop(mirror);
1495 int slot = java_lang_reflect_Field::slot(reflected);
1496 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1497
1498 fieldDescriptor fd;
1499 KlassHandle kh(THREAD, k);
1500 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1501
1502 if (modifiers & JVM_ACC_STATIC) {
1503 // for static fields we only look in the current class
1504 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1505 true, &fd)) {
1506 assert(false, "cannot find static field");
1507 return NULL; // robustness
1508 }
1509 } else {
1510 // for instance fields we start with the current class and work
1511 // our way up through the superclass chain
1512 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1513 &fd)) {
1514 assert(false, "cannot find instance field");
1515 return NULL; // robustness
1516 }
1517 }
1518
1519 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1520 JVM_END
1521
1522
1523 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1524 // some of this code was adapted from from jni_FromReflectedMethod
1525
1526 oop reflected = JNIHandles::resolve_non_null(method);
1527 oop mirror = NULL;
1528 int slot = 0;
1529
1530 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1531 mirror = java_lang_reflect_Constructor::clazz(reflected);
1532 slot = java_lang_reflect_Constructor::slot(reflected);
1533 } else {
1534 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1535 "wrong type");
1536 mirror = java_lang_reflect_Method::clazz(reflected);
1537 slot = java_lang_reflect_Method::slot(reflected);
1538 }
1539 klassOop k = java_lang_Class::as_klassOop(mirror);
1540
1541 KlassHandle kh(THREAD, k);
1542 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1543 if (m == NULL) {
1544 assert(false, "cannot find method");
1545 return NULL; // robustness
1546 }
1547
1548 return m;
1549 }
1550
1551
1552 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1553 JVMWrapper("JVM_GetMethodAnnotations");
1554
1555 // method is a handle to a java.lang.reflect.Method object
1556 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1557 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1558 JVM_END
1559
1560
1561 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1562 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1563
1564 // method is a handle to a java.lang.reflect.Method object
1565 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1566 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1567 JVM_END
1568
1569
1570 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1571 JVMWrapper("JVM_GetMethodParameterAnnotations");
1572
1573 // method is a handle to a java.lang.reflect.Method object
1574 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1575 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1576 JVM_END
1577
1578
1579 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1580
1581 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1582 {
1583 JVMWrapper("JVM_GetClassDeclaredFields");
1584 JvmtiVMObjectAllocEventCollector oam;
1585
1586 // Exclude primitive types and array types
1587 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1588 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1589 // Return empty array
1590 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1591 return (jobjectArray) JNIHandles::make_local(env, res);
1592 }
1593
1594 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1595 constantPoolHandle cp(THREAD, k->constants());
1596
1597 // Ensure class is linked
1598 k->link_class(CHECK_NULL);
1599
1600 typeArrayHandle fields(THREAD, k->fields());
1601 int fields_len = fields->length();
1602
1603 // 4496456 We need to filter out java.lang.Throwable.backtrace
1604 bool skip_backtrace = false;
1605
1606 // Allocate result
1607 int num_fields;
1608
1609 if (publicOnly) {
1610 num_fields = 0;
1611 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1612 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1613 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1614 }
1615 } else {
1616 num_fields = fields_len / instanceKlass::next_offset;
1617
1618 if (k() == SystemDictionary::Throwable_klass()) {
1619 num_fields--;
1620 skip_backtrace = true;
1621 }
1622 }
1623
1624 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1625 objArrayHandle result (THREAD, r);
1626
1627 int out_idx = 0;
1628 fieldDescriptor fd;
1629 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1630 if (skip_backtrace) {
1631 // 4496456 skip java.lang.Throwable.backtrace
1632 int offset = k->offset_from_fields(i);
1633 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1634 }
1635
1636 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1637 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1638 fd.initialize(k(), i);
1639 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1640 result->obj_at_put(out_idx, field);
1641 ++out_idx;
1642 }
1643 }
1644 assert(out_idx == num_fields, "just checking");
1645 return (jobjectArray) JNIHandles::make_local(env, result());
1646 }
1647 JVM_END
1648
1649 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1650 {
1651 JVMWrapper("JVM_GetClassDeclaredMethods");
1652 JvmtiVMObjectAllocEventCollector oam;
1653
1654 // Exclude primitive types and array types
1655 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1656 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1657 // Return empty array
1658 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1659 return (jobjectArray) JNIHandles::make_local(env, res);
1660 }
1661
1662 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1663
1664 // Ensure class is linked
1665 k->link_class(CHECK_NULL);
1666
1667 objArrayHandle methods (THREAD, k->methods());
1668 int methods_length = methods->length();
1669 int num_methods = 0;
1670
1671 int i;
1672 for (i = 0; i < methods_length; i++) {
1673 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1674 if (!method->is_initializer()) {
1675 if (!publicOnly || method->is_public()) {
1676 ++num_methods;
1677 }
1678 }
1679 }
1680
1681 // Allocate result
1682 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1683 objArrayHandle result (THREAD, r);
1684
1685 int out_idx = 0;
1686 for (i = 0; i < methods_length; i++) {
1687 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1688 if (!method->is_initializer()) {
1689 if (!publicOnly || method->is_public()) {
1690 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1691 result->obj_at_put(out_idx, m);
1692 ++out_idx;
1693 }
1694 }
1695 }
1696 assert(out_idx == num_methods, "just checking");
1697 return (jobjectArray) JNIHandles::make_local(env, result());
1698 }
1699 JVM_END
1700
1701 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1702 {
1703 JVMWrapper("JVM_GetClassDeclaredConstructors");
1704 JvmtiVMObjectAllocEventCollector oam;
1705
1706 // Exclude primitive types and array types
1707 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1708 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1709 // Return empty array
1710 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1711 return (jobjectArray) JNIHandles::make_local(env, res);
1712 }
1713
1714 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1715
1716 // Ensure class is linked
1717 k->link_class(CHECK_NULL);
1718
1719 objArrayHandle methods (THREAD, k->methods());
1720 int methods_length = methods->length();
1721 int num_constructors = 0;
1722
1723 int i;
1724 for (i = 0; i < methods_length; i++) {
1725 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1726 if (method->is_initializer() && !method->is_static()) {
1727 if (!publicOnly || method->is_public()) {
1728 ++num_constructors;
1729 }
1730 }
1731 }
1732
1733 // Allocate result
1734 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1735 objArrayHandle result(THREAD, r);
1736
1737 int out_idx = 0;
1738 for (i = 0; i < methods_length; i++) {
1739 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1740 if (method->is_initializer() && !method->is_static()) {
1741 if (!publicOnly || method->is_public()) {
1742 oop m = Reflection::new_constructor(method, CHECK_NULL);
1743 result->obj_at_put(out_idx, m);
1744 ++out_idx;
1745 }
1746 }
1747 }
1748 assert(out_idx == num_constructors, "just checking");
1749 return (jobjectArray) JNIHandles::make_local(env, result());
1750 }
1751 JVM_END
1752
1753 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1754 {
1755 JVMWrapper("JVM_GetClassAccessFlags");
1756 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1757 // Primitive type
1758 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1759 }
1760
1761 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1762 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1763 }
1764 JVM_END
1765
1766
1767 // Constant pool access //////////////////////////////////////////////////////////
1768
1769 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1770 {
1771 JVMWrapper("JVM_GetClassConstantPool");
1772 JvmtiVMObjectAllocEventCollector oam;
1773
1774 // Return null for primitives and arrays
1775 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1776 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1777 if (Klass::cast(k)->oop_is_instance()) {
1778 instanceKlassHandle k_h(THREAD, k);
1779 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1780 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1781 return JNIHandles::make_local(jcp());
1782 }
1783 }
1784 return NULL;
1785 }
1786 JVM_END
1787
1788
1789 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1790 {
1791 JVMWrapper("JVM_ConstantPoolGetSize");
1792 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1793 return cp->length();
1794 }
1795 JVM_END
1796
1797
1798 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1799 if (!cp->is_within_bounds(index)) {
1800 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1801 }
1802 }
1803
1804
1805 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1806 {
1807 JVMWrapper("JVM_ConstantPoolGetClassAt");
1808 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1809 bounds_check(cp, index, CHECK_NULL);
1810 constantTag tag = cp->tag_at(index);
1811 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1812 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1813 }
1814 klassOop k = cp->klass_at(index, CHECK_NULL);
1815 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1816 }
1817 JVM_END
1818
1819
1820 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1821 {
1822 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1823 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1824 bounds_check(cp, index, CHECK_NULL);
1825 constantTag tag = cp->tag_at(index);
1826 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1827 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1828 }
1829 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1830 if (k == NULL) return NULL;
1831 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1832 }
1833 JVM_END
1834
1835 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1836 constantTag tag = cp->tag_at(index);
1837 if (!tag.is_method() && !tag.is_interface_method()) {
1838 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1839 }
1840 int klass_ref = cp->uncached_klass_ref_index_at(index);
1841 klassOop k_o;
1842 if (force_resolution) {
1843 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1844 } else {
1845 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1846 if (k_o == NULL) return NULL;
1847 }
1848 instanceKlassHandle k(THREAD, k_o);
1849 symbolOop name = cp->uncached_name_ref_at(index);
1850 symbolOop sig = cp->uncached_signature_ref_at(index);
1851 methodHandle m (THREAD, k->find_method(name, sig));
1852 if (m.is_null()) {
1853 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1854 }
1855 oop method;
1856 if (!m->is_initializer() || m->is_static()) {
1857 method = Reflection::new_method(m, true, true, CHECK_NULL);
1858 } else {
1859 method = Reflection::new_constructor(m, CHECK_NULL);
1860 }
1861 return JNIHandles::make_local(method);
1862 }
1863
1864 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1865 {
1866 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1867 JvmtiVMObjectAllocEventCollector oam;
1868 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1869 bounds_check(cp, index, CHECK_NULL);
1870 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1871 return res;
1872 }
1873 JVM_END
1874
1875 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1876 {
1877 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1878 JvmtiVMObjectAllocEventCollector oam;
1879 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1880 bounds_check(cp, index, CHECK_NULL);
1881 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1882 return res;
1883 }
1884 JVM_END
1885
1886 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1887 constantTag tag = cp->tag_at(index);
1888 if (!tag.is_field()) {
1889 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1890 }
1891 int klass_ref = cp->uncached_klass_ref_index_at(index);
1892 klassOop k_o;
1893 if (force_resolution) {
1894 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1895 } else {
1896 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1897 if (k_o == NULL) return NULL;
1898 }
1899 instanceKlassHandle k(THREAD, k_o);
1900 symbolOop name = cp->uncached_name_ref_at(index);
1901 symbolOop sig = cp->uncached_signature_ref_at(index);
1902 fieldDescriptor fd;
1903 klassOop target_klass = k->find_field(name, sig, &fd);
1904 if (target_klass == NULL) {
1905 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1906 }
1907 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1908 return JNIHandles::make_local(field);
1909 }
1910
1911 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1912 {
1913 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1914 JvmtiVMObjectAllocEventCollector oam;
1915 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1916 bounds_check(cp, index, CHECK_NULL);
1917 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1918 return res;
1919 }
1920 JVM_END
1921
1922 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1923 {
1924 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1925 JvmtiVMObjectAllocEventCollector oam;
1926 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1927 bounds_check(cp, index, CHECK_NULL);
1928 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1929 return res;
1930 }
1931 JVM_END
1932
1933 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1934 {
1935 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1936 JvmtiVMObjectAllocEventCollector oam;
1937 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1938 bounds_check(cp, index, CHECK_NULL);
1939 constantTag tag = cp->tag_at(index);
1940 if (!tag.is_field_or_method()) {
1941 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1942 }
1943 int klass_ref = cp->uncached_klass_ref_index_at(index);
1944 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1945 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1946 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1947 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1948 objArrayHandle dest(THREAD, dest_o);
1949 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1950 dest->obj_at_put(0, str());
1951 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1952 dest->obj_at_put(1, str());
1953 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1954 dest->obj_at_put(2, str());
1955 return (jobjectArray) JNIHandles::make_local(dest());
1956 }
1957 JVM_END
1958
1959 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1960 {
1961 JVMWrapper("JVM_ConstantPoolGetIntAt");
1962 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1963 bounds_check(cp, index, CHECK_0);
1964 constantTag tag = cp->tag_at(index);
1965 if (!tag.is_int()) {
1966 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1967 }
1968 return cp->int_at(index);
1969 }
1970 JVM_END
1971
1972 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1973 {
1974 JVMWrapper("JVM_ConstantPoolGetLongAt");
1975 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1976 bounds_check(cp, index, CHECK_(0L));
1977 constantTag tag = cp->tag_at(index);
1978 if (!tag.is_long()) {
1979 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1980 }
1981 return cp->long_at(index);
1982 }
1983 JVM_END
1984
1985 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1986 {
1987 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1988 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1989 bounds_check(cp, index, CHECK_(0.0f));
1990 constantTag tag = cp->tag_at(index);
1991 if (!tag.is_float()) {
1992 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1993 }
1994 return cp->float_at(index);
1995 }
1996 JVM_END
1997
1998 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1999 {
2000 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2001 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2002 bounds_check(cp, index, CHECK_(0.0));
2003 constantTag tag = cp->tag_at(index);
2004 if (!tag.is_double()) {
2005 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2006 }
2007 return cp->double_at(index);
2008 }
2009 JVM_END
2010
2011 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2012 {
2013 JVMWrapper("JVM_ConstantPoolGetStringAt");
2014 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2015 bounds_check(cp, index, CHECK_NULL);
2016 constantTag tag = cp->tag_at(index);
2017 if (!tag.is_string() && !tag.is_unresolved_string()) {
2018 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2019 }
2020 oop str = cp->string_at(index, CHECK_NULL);
2021 return (jstring) JNIHandles::make_local(str);
2022 }
2023 JVM_END
2024
2025 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2026 {
2027 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2028 JvmtiVMObjectAllocEventCollector oam;
2029 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2030 bounds_check(cp, index, CHECK_NULL);
2031 constantTag tag = cp->tag_at(index);
2032 if (!tag.is_symbol()) {
2033 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2034 }
2035 symbolOop sym_o = cp->symbol_at(index);
2036 symbolHandle sym(THREAD, sym_o);
2037 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2038 return (jstring) JNIHandles::make_local(str());
2039 }
2040 JVM_END
2041
2042
2043 // Assertion support. //////////////////////////////////////////////////////////
2044
2045 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2046 JVMWrapper("JVM_DesiredAssertionStatus");
2047 assert(cls != NULL, "bad class");
2048
2049 oop r = JNIHandles::resolve(cls);
2050 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2051 if (java_lang_Class::is_primitive(r)) return false;
2052
2053 klassOop k = java_lang_Class::as_klassOop(r);
2054 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2055 if (! Klass::cast(k)->oop_is_instance()) return false;
2056
2057 ResourceMark rm(THREAD);
2058 const char* name = Klass::cast(k)->name()->as_C_string();
2059 bool system_class = Klass::cast(k)->class_loader() == NULL;
2060 return JavaAssertions::enabled(name, system_class);
2061
2062 JVM_END
2063
2064
2065 // Return a new AssertionStatusDirectives object with the fields filled in with
2066 // command-line assertion arguments (i.e., -ea, -da).
2067 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2068 JVMWrapper("JVM_AssertionStatusDirectives");
2069 JvmtiVMObjectAllocEventCollector oam;
2070 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2071 return JNIHandles::make_local(env, asd);
2072 JVM_END
2073
2074 // Verification ////////////////////////////////////////////////////////////////////////////////
2075
2076 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2077
2078 // RedefineClasses support: bug 6214132 caused verification to fail.
2079 // All functions from this section should call the jvmtiThreadSate function:
2080 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2081 // The function returns a klassOop of the _scratch_class if the verifier
2082 // was invoked in the middle of the class redefinition.
2083 // Otherwise it returns its argument value which is the _the_class klassOop.
2084 // Please, refer to the description in the jvmtiThreadSate.hpp.
2085
2086 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2087 JVMWrapper("JVM_GetClassNameUTF");
2088 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2089 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2090 return Klass::cast(k)->name()->as_utf8();
2091 JVM_END
2092
2093
2094 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2095 JVMWrapper("JVM_GetClassCPTypes");
2096 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2097 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2098 // types will have length zero if this is not an instanceKlass
2099 // (length is determined by call to JVM_GetClassCPEntriesCount)
2100 if (Klass::cast(k)->oop_is_instance()) {
2101 constantPoolOop cp = instanceKlass::cast(k)->constants();
2102 for (int index = cp->length() - 1; index >= 0; index--) {
2103 constantTag tag = cp->tag_at(index);
2104 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2105 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2106 }
2107 }
2108 JVM_END
2109
2110
2111 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2112 JVMWrapper("JVM_GetClassCPEntriesCount");
2113 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2114 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2115 if (!Klass::cast(k)->oop_is_instance())
2116 return 0;
2117 return instanceKlass::cast(k)->constants()->length();
2118 JVM_END
2119
2120
2121 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2122 JVMWrapper("JVM_GetClassFieldsCount");
2123 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2124 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2125 if (!Klass::cast(k)->oop_is_instance())
2126 return 0;
2127 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
2128 JVM_END
2129
2130
2131 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2132 JVMWrapper("JVM_GetClassMethodsCount");
2133 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2134 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2135 if (!Klass::cast(k)->oop_is_instance())
2136 return 0;
2137 return instanceKlass::cast(k)->methods()->length();
2138 JVM_END
2139
2140
2141 // The following methods, used for the verifier, are never called with
2142 // array klasses, so a direct cast to instanceKlass is safe.
2143 // Typically, these methods are called in a loop with bounds determined
2144 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2145 // zero for arrays.
2146 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2147 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2148 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2149 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2150 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2151 int length = methodOop(method)->checked_exceptions_length();
2152 if (length > 0) {
2153 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2154 for (int i = 0; i < length; i++) {
2155 exceptions[i] = table[i].class_cp_index;
2156 }
2157 }
2158 JVM_END
2159
2160
2161 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2162 JVMWrapper("JVM_GetMethodIxExceptionsCount");
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 return methodOop(method)->checked_exceptions_length();
2167 JVM_END
2168
2169
2170 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2171 JVMWrapper("JVM_GetMethodIxByteCode");
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 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2176 JVM_END
2177
2178
2179 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2180 JVMWrapper("JVM_GetMethodIxByteCodeLength");
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 return methodOop(method)->code_size();
2185 JVM_END
2186
2187
2188 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2189 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2190 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2191 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2192 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2193 typeArrayOop extable = methodOop(method)->exception_table();
2194 entry->start_pc = extable->int_at(entry_index * 4);
2195 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2196 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2197 entry->catchType = extable->int_at(entry_index * 4 + 3);
2198 JVM_END
2199
2200
2201 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2202 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
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)->exception_table()->length() / 4;
2207 JVM_END
2208
2209
2210 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2211 JVMWrapper("JVM_GetMethodIxModifiers");
2212 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2213 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2214 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2215 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2216 JVM_END
2217
2218
2219 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2220 JVMWrapper("JVM_GetFieldIxModifiers");
2221 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2222 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2223 typeArrayOop fields = instanceKlass::cast(k)->fields();
2224 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2225 JVM_END
2226
2227
2228 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2229 JVMWrapper("JVM_GetMethodIxLocalsCount");
2230 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2233 return methodOop(method)->max_locals();
2234 JVM_END
2235
2236
2237 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2238 JVMWrapper("JVM_GetMethodIxArgsSize");
2239 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2240 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2241 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2242 return methodOop(method)->size_of_parameters();
2243 JVM_END
2244
2245
2246 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2247 JVMWrapper("JVM_GetMethodIxMaxStack");
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)->max_stack();
2252 JVM_END
2253
2254
2255 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2256 JVMWrapper("JVM_IsConstructorIx");
2257 ResourceMark rm(THREAD);
2258 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2260 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2261 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2262 JVM_END
2263
2264
2265 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2266 JVMWrapper("JVM_GetMethodIxIxUTF");
2267 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2268 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2269 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2270 return methodOop(method)->name()->as_utf8();
2271 JVM_END
2272
2273
2274 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2275 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2276 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2278 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2279 return methodOop(method)->signature()->as_utf8();
2280 JVM_END
2281
2282 /**
2283 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2284 * read entries in the constant pool. Since the old verifier always
2285 * works on a copy of the code, it will not see any rewriting that
2286 * may possibly occur in the middle of verification. So it is important
2287 * that nothing it calls tries to use the cpCache instead of the raw
2288 * constant pool, so we must use cp->uncached_x methods when appropriate.
2289 */
2290 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2291 JVMWrapper("JVM_GetCPFieldNameUTF");
2292 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294 constantPoolOop cp = instanceKlass::cast(k)->constants();
2295 switch (cp->tag_at(cp_index).value()) {
2296 case JVM_CONSTANT_Fieldref:
2297 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2298 default:
2299 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2300 }
2301 ShouldNotReachHere();
2302 return NULL;
2303 JVM_END
2304
2305
2306 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2307 JVMWrapper("JVM_GetCPMethodNameUTF");
2308 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2309 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310 constantPoolOop cp = instanceKlass::cast(k)->constants();
2311 switch (cp->tag_at(cp_index).value()) {
2312 case JVM_CONSTANT_InterfaceMethodref:
2313 case JVM_CONSTANT_Methodref:
2314 case JVM_CONSTANT_NameAndType: // for invokedynamic
2315 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2316 default:
2317 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2318 }
2319 ShouldNotReachHere();
2320 return NULL;
2321 JVM_END
2322
2323
2324 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2325 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2326 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2327 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2328 constantPoolOop cp = instanceKlass::cast(k)->constants();
2329 switch (cp->tag_at(cp_index).value()) {
2330 case JVM_CONSTANT_InterfaceMethodref:
2331 case JVM_CONSTANT_Methodref:
2332 case JVM_CONSTANT_NameAndType: // for invokedynamic
2333 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2334 default:
2335 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2336 }
2337 ShouldNotReachHere();
2338 return NULL;
2339 JVM_END
2340
2341
2342 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2343 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2344 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2345 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2346 constantPoolOop cp = instanceKlass::cast(k)->constants();
2347 switch (cp->tag_at(cp_index).value()) {
2348 case JVM_CONSTANT_Fieldref:
2349 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2350 default:
2351 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2352 }
2353 ShouldNotReachHere();
2354 return NULL;
2355 JVM_END
2356
2357
2358 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2359 JVMWrapper("JVM_GetCPClassNameUTF");
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 symbolOop classname = cp->klass_name_at(cp_index);
2364 return classname->as_utf8();
2365 JVM_END
2366
2367
2368 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2369 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2370 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2371 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372 constantPoolOop cp = instanceKlass::cast(k)->constants();
2373 switch (cp->tag_at(cp_index).value()) {
2374 case JVM_CONSTANT_Fieldref: {
2375 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2376 symbolOop classname = cp->klass_name_at(class_index);
2377 return classname->as_utf8();
2378 }
2379 default:
2380 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2381 }
2382 ShouldNotReachHere();
2383 return NULL;
2384 JVM_END
2385
2386
2387 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2388 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2389 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2390 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2391 constantPoolOop cp = instanceKlass::cast(k)->constants();
2392 switch (cp->tag_at(cp_index).value()) {
2393 case JVM_CONSTANT_Methodref:
2394 case JVM_CONSTANT_InterfaceMethodref: {
2395 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2396 symbolOop classname = cp->klass_name_at(class_index);
2397 return classname->as_utf8();
2398 }
2399 default:
2400 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2401 }
2402 ShouldNotReachHere();
2403 return NULL;
2404 JVM_END
2405
2406
2407 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2408 JVMWrapper("JVM_GetCPFieldModifiers");
2409 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2410 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2413 constantPoolOop cp = instanceKlass::cast(k)->constants();
2414 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2415 switch (cp->tag_at(cp_index).value()) {
2416 case JVM_CONSTANT_Fieldref: {
2417 symbolOop name = cp->uncached_name_ref_at(cp_index);
2418 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2419 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2420 int fields_count = fields->length();
2421 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2422 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2423 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2424 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2425 }
2426 }
2427 return -1;
2428 }
2429 default:
2430 fatal("JVM_GetCPFieldModifiers: illegal constant");
2431 }
2432 ShouldNotReachHere();
2433 return 0;
2434 JVM_END
2435
2436
2437 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2438 JVMWrapper("JVM_GetCPMethodModifiers");
2439 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2440 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2443 constantPoolOop cp = instanceKlass::cast(k)->constants();
2444 switch (cp->tag_at(cp_index).value()) {
2445 case JVM_CONSTANT_Methodref:
2446 case JVM_CONSTANT_InterfaceMethodref: {
2447 symbolOop name = cp->uncached_name_ref_at(cp_index);
2448 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2449 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2450 int methods_count = methods->length();
2451 for (int i = 0; i < methods_count; i++) {
2452 methodOop method = methodOop(methods->obj_at(i));
2453 if (method->name() == name && method->signature() == signature) {
2454 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2455 }
2456 }
2457 return -1;
2458 }
2459 default:
2460 fatal("JVM_GetCPMethodModifiers: illegal constant");
2461 }
2462 ShouldNotReachHere();
2463 return 0;
2464 JVM_END
2465
2466
2467 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2468
2469 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2470 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2471 JVM_END
2472
2473
2474 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2475 JVMWrapper("JVM_IsSameClassPackage");
2476 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2477 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2478 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2479 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2480 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2481 JVM_END
2482
2483
2484 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2485
2486 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2487 JVMWrapper2("JVM_Open (%s)", fname);
2488
2489 //%note jvm_r6
2490 int result = hpi::open(fname, flags, mode);
2491 if (result >= 0) {
2492 return result;
2493 } else {
2494 switch(errno) {
2495 case EEXIST:
2496 return JVM_EEXIST;
2497 default:
2498 return -1;
2499 }
2500 }
2501 JVM_END
2502
2503
2504 JVM_LEAF(jint, JVM_Close(jint fd))
2505 JVMWrapper2("JVM_Close (0x%x)", fd);
2506 //%note jvm_r6
2507 return hpi::close(fd);
2508 JVM_END
2509
2510
2511 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2512 JVMWrapper2("JVM_Read (0x%x)", fd);
2513
2514 //%note jvm_r6
2515 return (jint)hpi::read(fd, buf, nbytes);
2516 JVM_END
2517
2518
2519 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2520 JVMWrapper2("JVM_Write (0x%x)", fd);
2521
2522 //%note jvm_r6
2523 return (jint)hpi::write(fd, buf, nbytes);
2524 JVM_END
2525
2526
2527 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2528 JVMWrapper2("JVM_Available (0x%x)", fd);
2529 //%note jvm_r6
2530 return hpi::available(fd, pbytes);
2531 JVM_END
2532
2533
2534 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2535 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2536 //%note jvm_r6
2537 return hpi::lseek(fd, offset, whence);
2538 JVM_END
2539
2540
2541 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2542 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2543 return hpi::ftruncate(fd, length);
2544 JVM_END
2545
2546
2547 JVM_LEAF(jint, JVM_Sync(jint fd))
2548 JVMWrapper2("JVM_Sync (0x%x)", fd);
2549 //%note jvm_r6
2550 return hpi::fsync(fd);
2551 JVM_END
2552
2553
2554 // Printing support //////////////////////////////////////////////////
2555 extern "C" {
2556
2557 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2558 // see bug 4399518, 4417214
2559 if ((intptr_t)count <= 0) return -1;
2560 return vsnprintf(str, count, fmt, args);
2561 }
2562
2563
2564 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2565 va_list args;
2566 int len;
2567 va_start(args, fmt);
2568 len = jio_vsnprintf(str, count, fmt, args);
2569 va_end(args);
2570 return len;
2571 }
2572
2573
2574 int jio_fprintf(FILE* f, const char *fmt, ...) {
2575 int len;
2576 va_list args;
2577 va_start(args, fmt);
2578 len = jio_vfprintf(f, fmt, args);
2579 va_end(args);
2580 return len;
2581 }
2582
2583
2584 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2585 if (Arguments::vfprintf_hook() != NULL) {
2586 return Arguments::vfprintf_hook()(f, fmt, args);
2587 } else {
2588 return vfprintf(f, fmt, args);
2589 }
2590 }
2591
2592
2593 int jio_printf(const char *fmt, ...) {
2594 int len;
2595 va_list args;
2596 va_start(args, fmt);
2597 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2598 va_end(args);
2599 return len;
2600 }
2601
2602
2603 // HotSpot specific jio method
2604 void jio_print(const char* s) {
2605 // Try to make this function as atomic as possible.
2606 if (Arguments::vfprintf_hook() != NULL) {
2607 jio_fprintf(defaultStream::output_stream(), "%s", s);
2608 } else {
2609 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2610 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2611 }
2612 }
2613
2614 } // Extern C
2615
2616 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2617
2618 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2619 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2620 // OSThread objects. The exception to this rule is when the target object is the thread
2621 // doing the operation, in which case we know that the thread won't exit until the
2622 // operation is done (all exits being voluntary). There are a few cases where it is
2623 // rather silly to do operations on yourself, like resuming yourself or asking whether
2624 // you are alive. While these can still happen, they are not subject to deadlocks if
2625 // the lock is held while the operation occurs (this is not the case for suspend, for
2626 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2627 // implementation is local to this file, we always lock Threads_lock for that one.
2628
2629 static void thread_entry(JavaThread* thread, TRAPS) {
2630 HandleMark hm(THREAD);
2631 Handle obj(THREAD, thread->threadObj());
2632 JavaValue result(T_VOID);
2633 JavaCalls::call_virtual(&result,
2634 obj,
2635 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2636 vmSymbolHandles::run_method_name(),
2637 vmSymbolHandles::void_method_signature(),
2638 THREAD);
2639 }
2640
2641
2642 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2643 JVMWrapper("JVM_StartThread");
2644 JavaThread *native_thread = NULL;
2645
2646 // We cannot hold the Threads_lock when we throw an exception,
2647 // due to rank ordering issues. Example: we might need to grab the
2648 // Heap_lock while we construct the exception.
2649 bool throw_illegal_thread_state = false;
2650
2651 // We must release the Threads_lock before we can post a jvmti event
2652 // in Thread::start.
2653 {
2654 // Ensure that the C++ Thread and OSThread structures aren't freed before
2655 // we operate.
2656 MutexLocker mu(Threads_lock);
2657
2658 // Check to see if we're running a thread that's already exited or was
2659 // stopped (is_stillborn) or is still active (thread is not NULL).
2660 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2661 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2662 throw_illegal_thread_state = true;
2663 } else {
2664 jlong size =
2665 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2666 // Allocate the C++ Thread structure and create the native thread. The
2667 // stack size retrieved from java is signed, but the constructor takes
2668 // size_t (an unsigned type), so avoid passing negative values which would
2669 // result in really large stacks.
2670 size_t sz = size > 0 ? (size_t) size : 0;
2671 native_thread = new JavaThread(&thread_entry, sz);
2672
2673 // At this point it may be possible that no osthread was created for the
2674 // JavaThread due to lack of memory. Check for this situation and throw
2675 // an exception if necessary. Eventually we may want to change this so
2676 // that we only grab the lock if the thread was created successfully -
2677 // then we can also do this check and throw the exception in the
2678 // JavaThread constructor.
2679 if (native_thread->osthread() != NULL) {
2680 // Note: the current thread is not being used within "prepare".
2681 native_thread->prepare(jthread);
2682 }
2683 }
2684 }
2685
2686 if (throw_illegal_thread_state) {
2687 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2688 }
2689
2690 assert(native_thread != NULL, "Starting null thread?");
2691
2692 if (native_thread->osthread() == NULL) {
2693 // No one should hold a reference to the 'native_thread'.
2694 delete native_thread;
2695 if (JvmtiExport::should_post_resource_exhausted()) {
2696 JvmtiExport::post_resource_exhausted(
2697 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2698 "unable to create new native thread");
2699 }
2700 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2701 "unable to create new native thread");
2702 }
2703
2704 Thread::start(native_thread);
2705
2706 JVM_END
2707
2708 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2709 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2710 // but is thought to be reliable and simple. In the case, where the receiver is the
2711 // save thread as the sender, no safepoint is needed.
2712 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2713 JVMWrapper("JVM_StopThread");
2714
2715 oop java_throwable = JNIHandles::resolve(throwable);
2716 if (java_throwable == NULL) {
2717 THROW(vmSymbols::java_lang_NullPointerException());
2718 }
2719 oop java_thread = JNIHandles::resolve_non_null(jthread);
2720 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2721 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2722 // First check if thread already exited
2723 if (receiver != NULL) {
2724 // Check if exception is getting thrown at self (use oop equality, since the
2725 // target object might exit)
2726 if (java_thread == thread->threadObj()) {
2727 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2728 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2729 // threads from being restarted.
2730 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2731 // any effect on the "liveness" of a thread; see
2732 // JVM_IsThreadAlive, below.
2733 if (java_throwable->is_a(SystemDictionary::ThreadDeath_klass())) {
2734 java_lang_Thread::set_stillborn(java_thread);
2735 }
2736 THROW_OOP(java_throwable);
2737 } else {
2738 // Enques a VM_Operation to stop all threads and then deliver the exception...
2739 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2740 }
2741 }
2742 JVM_END
2743
2744
2745 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2746 JVMWrapper("JVM_IsThreadAlive");
2747
2748 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2749 return java_lang_Thread::is_alive(thread_oop);
2750 JVM_END
2751
2752
2753 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2754 JVMWrapper("JVM_SuspendThread");
2755 oop java_thread = JNIHandles::resolve_non_null(jthread);
2756 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2757
2758 if (receiver != NULL) {
2759 // thread has run and has not exited (still on threads list)
2760
2761 {
2762 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2763 if (receiver->is_external_suspend()) {
2764 // Don't allow nested external suspend requests. We can't return
2765 // an error from this interface so just ignore the problem.
2766 return;
2767 }
2768 if (receiver->is_exiting()) { // thread is in the process of exiting
2769 return;
2770 }
2771 receiver->set_external_suspend();
2772 }
2773
2774 // java_suspend() will catch threads in the process of exiting
2775 // and will ignore them.
2776 receiver->java_suspend();
2777
2778 // It would be nice to have the following assertion in all the
2779 // time, but it is possible for a racing resume request to have
2780 // resumed this thread right after we suspended it. Temporarily
2781 // enable this assertion if you are chasing a different kind of
2782 // bug.
2783 //
2784 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2785 // receiver->is_being_ext_suspended(), "thread is not suspended");
2786 }
2787 JVM_END
2788
2789
2790 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2791 JVMWrapper("JVM_ResumeThread");
2792 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2793 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2794 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2795 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2796 // looks at it.
2797 MutexLocker ml(Threads_lock);
2798 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2799 if (thr != NULL) {
2800 // the thread has run and is not in the process of exiting
2801 thr->java_resume();
2802 }
2803 JVM_END
2804
2805
2806 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2807 JVMWrapper("JVM_SetThreadPriority");
2808 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2809 MutexLocker ml(Threads_lock);
2810 oop java_thread = JNIHandles::resolve_non_null(jthread);
2811 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2812 JavaThread* thr = java_lang_Thread::thread(java_thread);
2813 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2814 Thread::set_priority(thr, (ThreadPriority)prio);
2815 }
2816 JVM_END
2817
2818
2819 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2820 JVMWrapper("JVM_Yield");
2821 if (os::dont_yield()) return;
2822 HS_DTRACE_PROBE0(hotspot, thread__yield);
2823 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2824 // Critical for similar threading behaviour
2825 if (ConvertYieldToSleep) {
2826 os::sleep(thread, MinSleepInterval, false);
2827 } else {
2828 os::yield();
2829 }
2830 JVM_END
2831
2832
2833 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2834 JVMWrapper("JVM_Sleep");
2835
2836 if (millis < 0) {
2837 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2838 }
2839
2840 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2841 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2842 }
2843
2844 // Save current thread state and restore it at the end of this block.
2845 // And set new thread state to SLEEPING.
2846 JavaThreadSleepState jtss(thread);
2847
2848 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2849
2850 if (millis == 0) {
2851 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2852 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2853 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2854 // for SOLARIS
2855 if (ConvertSleepToYield) {
2856 os::yield();
2857 } else {
2858 ThreadState old_state = thread->osthread()->get_state();
2859 thread->osthread()->set_state(SLEEPING);
2860 os::sleep(thread, MinSleepInterval, false);
2861 thread->osthread()->set_state(old_state);
2862 }
2863 } else {
2864 ThreadState old_state = thread->osthread()->get_state();
2865 thread->osthread()->set_state(SLEEPING);
2866 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2867 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2868 // us while we were sleeping. We do not overwrite those.
2869 if (!HAS_PENDING_EXCEPTION) {
2870 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2871 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2872 // to properly restore the thread state. That's likely wrong.
2873 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2874 }
2875 }
2876 thread->osthread()->set_state(old_state);
2877 }
2878 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2879 JVM_END
2880
2881 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2882 JVMWrapper("JVM_CurrentThread");
2883 oop jthread = thread->threadObj();
2884 assert (thread != NULL, "no current thread!");
2885 return JNIHandles::make_local(env, jthread);
2886 JVM_END
2887
2888
2889 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2890 JVMWrapper("JVM_CountStackFrames");
2891
2892 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2893 oop java_thread = JNIHandles::resolve_non_null(jthread);
2894 bool throw_illegal_thread_state = false;
2895 int count = 0;
2896
2897 {
2898 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2899 // We need to re-resolve the java_thread, since a GC might have happened during the
2900 // acquire of the lock
2901 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2902
2903 if (thr == NULL) {
2904 // do nothing
2905 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2906 // Check whether this java thread has been suspended already. If not, throws
2907 // IllegalThreadStateException. We defer to throw that exception until
2908 // Threads_lock is released since loading exception class has to leave VM.
2909 // The correct way to test a thread is actually suspended is
2910 // wait_for_ext_suspend_completion(), but we can't call that while holding
2911 // the Threads_lock. The above tests are sufficient for our purposes
2912 // provided the walkability of the stack is stable - which it isn't
2913 // 100% but close enough for most practical purposes.
2914 throw_illegal_thread_state = true;
2915 } else {
2916 // Count all java activation, i.e., number of vframes
2917 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2918 // Native frames are not counted
2919 if (!vfst.method()->is_native()) count++;
2920 }
2921 }
2922 }
2923
2924 if (throw_illegal_thread_state) {
2925 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2926 "this thread is not suspended");
2927 }
2928 return count;
2929 JVM_END
2930
2931 // Consider: A better way to implement JVM_Interrupt() is to acquire
2932 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2933 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2934 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2935 // outside the critical section. Threads_lock is hot so we want to minimize
2936 // the hold-time. A cleaner interface would be to decompose interrupt into
2937 // two steps. The 1st phase, performed under Threads_lock, would return
2938 // a closure that'd be invoked after Threads_lock was dropped.
2939 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2940 // admit spurious wakeups.
2941
2942 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2943 JVMWrapper("JVM_Interrupt");
2944
2945 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2946 oop java_thread = JNIHandles::resolve_non_null(jthread);
2947 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2948 // We need to re-resolve the java_thread, since a GC might have happened during the
2949 // acquire of the lock
2950 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2951 if (thr != NULL) {
2952 Thread::interrupt(thr);
2953 }
2954 JVM_END
2955
2956
2957 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2958 JVMWrapper("JVM_IsInterrupted");
2959
2960 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2961 oop java_thread = JNIHandles::resolve_non_null(jthread);
2962 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2963 // We need to re-resolve the java_thread, since a GC might have happened during the
2964 // acquire of the lock
2965 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2966 if (thr == NULL) {
2967 return JNI_FALSE;
2968 } else {
2969 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2970 }
2971 JVM_END
2972
2973
2974 // Return true iff the current thread has locked the object passed in
2975
2976 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2977 JVMWrapper("JVM_HoldsLock");
2978 assert(THREAD->is_Java_thread(), "sanity check");
2979 if (obj == NULL) {
2980 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2981 }
2982 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2983 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2984 JVM_END
2985
2986
2987 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2988 JVMWrapper("JVM_DumpAllStacks");
2989 VM_PrintThreads op;
2990 VMThread::execute(&op);
2991 if (JvmtiExport::should_post_data_dump()) {
2992 JvmtiExport::post_data_dump();
2993 }
2994 JVM_END
2995
2996
2997 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2998
2999 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3000 assert(jthread->is_Java_thread(), "must be a Java thread");
3001 if (jthread->privileged_stack_top() == NULL) return false;
3002 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3003 oop loader = jthread->privileged_stack_top()->class_loader();
3004 if (loader == NULL) return true;
3005 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3006 if (trusted) return true;
3007 }
3008 return false;
3009 }
3010
3011 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3012 JVMWrapper("JVM_CurrentLoadedClass");
3013 ResourceMark rm(THREAD);
3014
3015 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3016 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3017 bool trusted = is_trusted_frame(thread, &vfst);
3018 if (trusted) return NULL;
3019
3020 methodOop m = vfst.method();
3021 if (!m->is_native()) {
3022 klassOop holder = m->method_holder();
3023 oop loader = instanceKlass::cast(holder)->class_loader();
3024 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3025 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3026 }
3027 }
3028 }
3029 return NULL;
3030 JVM_END
3031
3032
3033 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3034 JVMWrapper("JVM_CurrentClassLoader");
3035 ResourceMark rm(THREAD);
3036
3037 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3038
3039 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3040 bool trusted = is_trusted_frame(thread, &vfst);
3041 if (trusted) return NULL;
3042
3043 methodOop m = vfst.method();
3044 if (!m->is_native()) {
3045 klassOop holder = m->method_holder();
3046 assert(holder->is_klass(), "just checking");
3047 oop loader = instanceKlass::cast(holder)->class_loader();
3048 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3049 return JNIHandles::make_local(env, loader);
3050 }
3051 }
3052 }
3053 return NULL;
3054 JVM_END
3055
3056
3057 // Utility object for collecting method holders walking down the stack
3058 class KlassLink: public ResourceObj {
3059 public:
3060 KlassHandle klass;
3061 KlassLink* next;
3062
3063 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3064 };
3065
3066
3067 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3068 JVMWrapper("JVM_GetClassContext");
3069 ResourceMark rm(THREAD);
3070 JvmtiVMObjectAllocEventCollector oam;
3071 // Collect linked list of (handles to) method holders
3072 KlassLink* first = NULL;
3073 KlassLink* last = NULL;
3074 int depth = 0;
3075
3076 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3077 // Native frames are not returned
3078 if (!vfst.method()->is_native()) {
3079 klassOop holder = vfst.method()->method_holder();
3080 assert(holder->is_klass(), "just checking");
3081 depth++;
3082 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3083 if (first == NULL) {
3084 first = last = l;
3085 } else {
3086 last->next = l;
3087 last = l;
3088 }
3089 }
3090 }
3091
3092 // Create result array of type [Ljava/lang/Class;
3093 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3094 // Fill in mirrors corresponding to method holders
3095 int index = 0;
3096 while (first != NULL) {
3097 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3098 first = first->next;
3099 }
3100 assert(index == depth, "just checking");
3101
3102 return (jobjectArray) JNIHandles::make_local(env, result);
3103 JVM_END
3104
3105
3106 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3107 JVMWrapper("JVM_ClassDepth");
3108 ResourceMark rm(THREAD);
3109 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3110 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3111
3112 const char* str = java_lang_String::as_utf8_string(class_name_str());
3113 symbolHandle class_name_sym =
3114 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
3115 if (class_name_sym.is_null()) {
3116 return -1;
3117 }
3118
3119 int depth = 0;
3120
3121 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3122 if (!vfst.method()->is_native()) {
3123 klassOop holder = vfst.method()->method_holder();
3124 assert(holder->is_klass(), "just checking");
3125 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
3126 return depth;
3127 }
3128 depth++;
3129 }
3130 }
3131 return -1;
3132 JVM_END
3133
3134
3135 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3136 JVMWrapper("JVM_ClassLoaderDepth");
3137 ResourceMark rm(THREAD);
3138 int depth = 0;
3139 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3140 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3141 bool trusted = is_trusted_frame(thread, &vfst);
3142 if (trusted) return -1;
3143
3144 methodOop m = vfst.method();
3145 if (!m->is_native()) {
3146 klassOop holder = m->method_holder();
3147 assert(holder->is_klass(), "just checking");
3148 oop loader = instanceKlass::cast(holder)->class_loader();
3149 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3150 return depth;
3151 }
3152 depth++;
3153 }
3154 }
3155 return -1;
3156 JVM_END
3157
3158
3159 // java.lang.Package ////////////////////////////////////////////////////////////////
3160
3161
3162 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3163 JVMWrapper("JVM_GetSystemPackage");
3164 ResourceMark rm(THREAD);
3165 JvmtiVMObjectAllocEventCollector oam;
3166 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3167 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3168 return (jstring) JNIHandles::make_local(result);
3169 JVM_END
3170
3171
3172 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3173 JVMWrapper("JVM_GetSystemPackages");
3174 JvmtiVMObjectAllocEventCollector oam;
3175 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3176 return (jobjectArray) JNIHandles::make_local(result);
3177 JVM_END
3178
3179
3180 // ObjectInputStream ///////////////////////////////////////////////////////////////
3181
3182 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3183 if (current_class == NULL) {
3184 return true;
3185 }
3186 if ((current_class == field_class) || access.is_public()) {
3187 return true;
3188 }
3189
3190 if (access.is_protected()) {
3191 // See if current_class is a subclass of field_class
3192 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3193 return true;
3194 }
3195 }
3196
3197 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3198 }
3199
3200
3201 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3202 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3203 JVMWrapper("JVM_AllocateNewObject");
3204 JvmtiVMObjectAllocEventCollector oam;
3205 // Receiver is not used
3206 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3207 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3208
3209 // Cannot instantiate primitive types
3210 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3211 ResourceMark rm(THREAD);
3212 THROW_0(vmSymbols::java_lang_InvalidClassException());
3213 }
3214
3215 // Arrays not allowed here, must use JVM_AllocateNewArray
3216 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3217 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3218 ResourceMark rm(THREAD);
3219 THROW_0(vmSymbols::java_lang_InvalidClassException());
3220 }
3221
3222 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3223 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3224
3225 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3226
3227 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3228 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3229
3230 // Make sure klass is initialized, since we are about to instantiate one of them.
3231 curr_klass->initialize(CHECK_NULL);
3232
3233 methodHandle m (THREAD,
3234 init_klass->find_method(vmSymbols::object_initializer_name(),
3235 vmSymbols::void_method_signature()));
3236 if (m.is_null()) {
3237 ResourceMark rm(THREAD);
3238 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3239 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3240 vmSymbols::object_initializer_name(),
3241 vmSymbols::void_method_signature()));
3242 }
3243
3244 if (curr_klass == init_klass && !m->is_public()) {
3245 // Calling the constructor for class 'curr_klass'.
3246 // Only allow calls to a public no-arg constructor.
3247 // This path corresponds to creating an Externalizable object.
3248 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3249 }
3250
3251 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3252 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3253 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3254 }
3255
3256 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3257 // Call constructor m. This might call a constructor higher up in the hierachy
3258 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3259
3260 return JNIHandles::make_local(obj());
3261 JVM_END
3262
3263
3264 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3265 JVMWrapper("JVM_AllocateNewArray");
3266 JvmtiVMObjectAllocEventCollector oam;
3267 oop mirror = JNIHandles::resolve_non_null(currClass);
3268
3269 if (java_lang_Class::is_primitive(mirror)) {
3270 THROW_0(vmSymbols::java_lang_InvalidClassException());
3271 }
3272 klassOop k = java_lang_Class::as_klassOop(mirror);
3273 oop result;
3274
3275 if (k->klass_part()->oop_is_typeArray()) {
3276 // typeArray
3277 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3278 } else if (k->klass_part()->oop_is_objArray()) {
3279 // objArray
3280 objArrayKlassHandle oak(THREAD, k);
3281 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3282 result = oak->allocate(length, CHECK_NULL);
3283 } else {
3284 THROW_0(vmSymbols::java_lang_InvalidClassException());
3285 }
3286 return JNIHandles::make_local(env, result);
3287 JVM_END
3288
3289
3290 // Return the first non-null class loader up the execution stack, or null
3291 // if only code from the null class loader is on the stack.
3292
3293 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3294 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3295 // UseNewReflection
3296 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3297 klassOop holder = vfst.method()->method_holder();
3298 oop loader = instanceKlass::cast(holder)->class_loader();
3299 if (loader != NULL) {
3300 return JNIHandles::make_local(env, loader);
3301 }
3302 }
3303 return NULL;
3304 JVM_END
3305
3306
3307 // Load a class relative to the most recent class on the stack with a non-null
3308 // classloader.
3309 // This function has been deprecated and should not be considered part of the
3310 // specified JVM interface.
3311
3312 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3313 jclass currClass, jstring currClassName))
3314 JVMWrapper("JVM_LoadClass0");
3315 // Receiver is not used
3316 ResourceMark rm(THREAD);
3317
3318 // Class name argument is not guaranteed to be in internal format
3319 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3320 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3321
3322 const char* str = java_lang_String::as_utf8_string(string());
3323
3324 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3325 // It's impossible to create this class; the name cannot fit
3326 // into the constant pool.
3327 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3328 }
3329
3330 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3331 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3332 // Find the most recent class on the stack with a non-null classloader
3333 oop loader = NULL;
3334 oop protection_domain = NULL;
3335 if (curr_klass.is_null()) {
3336 for (vframeStream vfst(thread);
3337 !vfst.at_end() && loader == NULL;
3338 vfst.next()) {
3339 if (!vfst.method()->is_native()) {
3340 klassOop holder = vfst.method()->method_holder();
3341 loader = instanceKlass::cast(holder)->class_loader();
3342 protection_domain = instanceKlass::cast(holder)->protection_domain();
3343 }
3344 }
3345 } else {
3346 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3347 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3348 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3349 }
3350 Handle h_loader(THREAD, loader);
3351 Handle h_prot (THREAD, protection_domain);
3352 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3353 false, thread);
3354 if (TraceClassResolution && result != NULL) {
3355 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3356 }
3357 return result;
3358 JVM_END
3359
3360
3361 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3362
3363
3364 // resolve array handle and check arguments
3365 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3366 if (arr == NULL) {
3367 THROW_0(vmSymbols::java_lang_NullPointerException());
3368 }
3369 oop a = JNIHandles::resolve_non_null(arr);
3370 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3371 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3372 }
3373 return arrayOop(a);
3374 }
3375
3376
3377 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3378 JVMWrapper("JVM_GetArrayLength");
3379 arrayOop a = check_array(env, arr, false, CHECK_0);
3380 return a->length();
3381 JVM_END
3382
3383
3384 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3385 JVMWrapper("JVM_Array_Get");
3386 JvmtiVMObjectAllocEventCollector oam;
3387 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3388 jvalue value;
3389 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3390 oop box = Reflection::box(&value, type, CHECK_NULL);
3391 return JNIHandles::make_local(env, box);
3392 JVM_END
3393
3394
3395 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3396 JVMWrapper("JVM_GetPrimitiveArrayElement");
3397 jvalue value;
3398 value.i = 0; // to initialize value before getting used in CHECK
3399 arrayOop a = check_array(env, arr, true, CHECK_(value));
3400 assert(a->is_typeArray(), "just checking");
3401 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3402 BasicType wide_type = (BasicType) wCode;
3403 if (type != wide_type) {
3404 Reflection::widen(&value, type, wide_type, CHECK_(value));
3405 }
3406 return value;
3407 JVM_END
3408
3409
3410 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3411 JVMWrapper("JVM_SetArrayElement");
3412 arrayOop a = check_array(env, arr, false, CHECK);
3413 oop box = JNIHandles::resolve(val);
3414 jvalue value;
3415 value.i = 0; // to initialize value before getting used in CHECK
3416 BasicType value_type;
3417 if (a->is_objArray()) {
3418 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3419 value_type = Reflection::unbox_for_regular_object(box, &value);
3420 } else {
3421 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3422 }
3423 Reflection::array_set(&value, a, index, value_type, CHECK);
3424 JVM_END
3425
3426
3427 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3428 JVMWrapper("JVM_SetPrimitiveArrayElement");
3429 arrayOop a = check_array(env, arr, true, CHECK);
3430 assert(a->is_typeArray(), "just checking");
3431 BasicType value_type = (BasicType) vCode;
3432 Reflection::array_set(&v, a, index, value_type, CHECK);
3433 JVM_END
3434
3435
3436 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3437 JVMWrapper("JVM_NewArray");
3438 JvmtiVMObjectAllocEventCollector oam;
3439 oop element_mirror = JNIHandles::resolve(eltClass);
3440 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3441 return JNIHandles::make_local(env, result);
3442 JVM_END
3443
3444
3445 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3446 JVMWrapper("JVM_NewMultiArray");
3447 JvmtiVMObjectAllocEventCollector oam;
3448 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3449 oop element_mirror = JNIHandles::resolve(eltClass);
3450 assert(dim_array->is_typeArray(), "just checking");
3451 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3452 return JNIHandles::make_local(env, result);
3453 JVM_END
3454
3455
3456 // Networking library support ////////////////////////////////////////////////////////////////////
3457
3458 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3459 JVMWrapper("JVM_InitializeSocketLibrary");
3460 return hpi::initialize_socket_library();
3461 JVM_END
3462
3463
3464 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3465 JVMWrapper("JVM_Socket");
3466 return hpi::socket(domain, type, protocol);
3467 JVM_END
3468
3469
3470 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3471 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3472 //%note jvm_r6
3473 return hpi::socket_close(fd);
3474 JVM_END
3475
3476
3477 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3478 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3479 //%note jvm_r6
3480 return hpi::socket_shutdown(fd, howto);
3481 JVM_END
3482
3483
3484 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3485 JVMWrapper2("JVM_Recv (0x%x)", fd);
3486 //%note jvm_r6
3487 return hpi::recv(fd, buf, nBytes, flags);
3488 JVM_END
3489
3490
3491 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3492 JVMWrapper2("JVM_Send (0x%x)", fd);
3493 //%note jvm_r6
3494 return hpi::send(fd, buf, nBytes, flags);
3495 JVM_END
3496
3497
3498 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3499 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3500 //%note jvm_r6
3501 return hpi::timeout(fd, timeout);
3502 JVM_END
3503
3504
3505 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3506 JVMWrapper2("JVM_Listen (0x%x)", fd);
3507 //%note jvm_r6
3508 return hpi::listen(fd, count);
3509 JVM_END
3510
3511
3512 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3513 JVMWrapper2("JVM_Connect (0x%x)", fd);
3514 //%note jvm_r6
3515 return hpi::connect(fd, him, len);
3516 JVM_END
3517
3518
3519 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3520 JVMWrapper2("JVM_Bind (0x%x)", fd);
3521 //%note jvm_r6
3522 return hpi::bind(fd, him, len);
3523 JVM_END
3524
3525
3526 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3527 JVMWrapper2("JVM_Accept (0x%x)", fd);
3528 //%note jvm_r6
3529 return hpi::accept(fd, him, (int *)len);
3530 JVM_END
3531
3532
3533 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3534 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3535 //%note jvm_r6
3536 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3537 JVM_END
3538
3539
3540 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3541 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3542 //%note jvm_r6
3543 return hpi::get_sock_name(fd, him, len);
3544 JVM_END
3545
3546
3547 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3548 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3549 //%note jvm_r6
3550 return hpi::sendto(fd, buf, len, flags, to, tolen);
3551 JVM_END
3552
3553
3554 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3555 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3556 //%note jvm_r6
3557 return hpi::socket_available(fd, pbytes);
3558 JVM_END
3559
3560
3561 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3562 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3563 //%note jvm_r6
3564 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3565 JVM_END
3566
3567
3568 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3569 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3570 //%note jvm_r6
3571 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3572 JVM_END
3573
3574 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3575 JVMWrapper("JVM_GetHostName");
3576 return hpi::get_host_name(name, namelen);
3577 JVM_END
3578
3579 #ifdef _WINDOWS
3580
3581 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3582 JVMWrapper("JVM_GetHostByAddr");
3583 return hpi::get_host_by_addr(name, len, type);
3584 JVM_END
3585
3586
3587 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3588 JVMWrapper("JVM_GetHostByName");
3589 return hpi::get_host_by_name(name);
3590 JVM_END
3591
3592
3593 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3594 JVMWrapper("JVM_GetProtoByName");
3595 return hpi::get_proto_by_name(name);
3596 JVM_END
3597
3598 #endif
3599
3600 // Library support ///////////////////////////////////////////////////////////////////////////
3601
3602 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3603 //%note jvm_ct
3604 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3605 char ebuf[1024];
3606 void *load_result;
3607 {
3608 ThreadToNativeFromVM ttnfvm(thread);
3609 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3610 }
3611 if (load_result == NULL) {
3612 char msg[1024];
3613 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3614 // Since 'ebuf' may contain a string encoded using
3615 // platform encoding scheme, we need to pass
3616 // Exceptions::unsafe_to_utf8 to the new_exception method
3617 // as the last argument. See bug 6367357.
3618 Handle h_exception =
3619 Exceptions::new_exception(thread,
3620 vmSymbols::java_lang_UnsatisfiedLinkError(),
3621 msg, Exceptions::unsafe_to_utf8);
3622
3623 THROW_HANDLE_0(h_exception);
3624 }
3625 return load_result;
3626 JVM_END
3627
3628
3629 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3630 JVMWrapper("JVM_UnloadLibrary");
3631 hpi::dll_unload(handle);
3632 JVM_END
3633
3634
3635 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3636 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3637 return hpi::dll_lookup(handle, name);
3638 JVM_END
3639
3640 // Floating point support ////////////////////////////////////////////////////////////////////
3641
3642 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3643 JVMWrapper("JVM_IsNaN");
3644 return g_isnan(a);
3645 JVM_END
3646
3647
3648
3649 // JNI version ///////////////////////////////////////////////////////////////////////////////
3650
3651 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3652 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3653 return Threads::is_supported_jni_version_including_1_1(version);
3654 JVM_END
3655
3656
3657 // String support ///////////////////////////////////////////////////////////////////////////
3658
3659 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3660 JVMWrapper("JVM_InternString");
3661 JvmtiVMObjectAllocEventCollector oam;
3662 if (str == NULL) return NULL;
3663 oop string = JNIHandles::resolve_non_null(str);
3664 oop result = StringTable::intern(string, CHECK_NULL);
3665 return (jstring) JNIHandles::make_local(env, result);
3666 JVM_END
3667
3668
3669 // Raw monitor support //////////////////////////////////////////////////////////////////////
3670
3671 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3672 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3673 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3674 // that only works with java threads.
3675
3676
3677 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3678 VM_Exit::block_if_vm_exited();
3679 JVMWrapper("JVM_RawMonitorCreate");
3680 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3681 }
3682
3683
3684 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3685 VM_Exit::block_if_vm_exited();
3686 JVMWrapper("JVM_RawMonitorDestroy");
3687 delete ((Mutex*) mon);
3688 }
3689
3690
3691 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3692 VM_Exit::block_if_vm_exited();
3693 JVMWrapper("JVM_RawMonitorEnter");
3694 ((Mutex*) mon)->jvm_raw_lock();
3695 return 0;
3696 }
3697
3698
3699 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3700 VM_Exit::block_if_vm_exited();
3701 JVMWrapper("JVM_RawMonitorExit");
3702 ((Mutex*) mon)->jvm_raw_unlock();
3703 }
3704
3705
3706 // Support for Serialization
3707
3708 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3709 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3710 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3711 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3712
3713 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3714 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3715 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3716 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3717
3718
3719 void initialize_converter_functions() {
3720 if (JDK_Version::is_gte_jdk14x_version()) {
3721 // These functions only exist for compatibility with 1.3.1 and earlier
3722 return;
3723 }
3724
3725 // called from universe_post_init()
3726 assert(
3727 int_bits_to_float_fn == NULL &&
3728 long_bits_to_double_fn == NULL &&
3729 float_to_int_bits_fn == NULL &&
3730 double_to_long_bits_fn == NULL ,
3731 "initialization done twice"
3732 );
3733 // initialize
3734 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3735 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3736 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3737 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3738 // verify
3739 assert(
3740 int_bits_to_float_fn != NULL &&
3741 long_bits_to_double_fn != NULL &&
3742 float_to_int_bits_fn != NULL &&
3743 double_to_long_bits_fn != NULL ,
3744 "initialization failed"
3745 );
3746 }
3747
3748
3749 // Serialization
3750 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3751 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3752 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3753
3754 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3755 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3756 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3757 oop o = JNIHandles::resolve(obj);
3758
3759 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3760 THROW(vmSymbols::java_lang_NullPointerException());
3761 }
3762
3763 jsize nfids = fids->length();
3764 if (nfids == 0) return;
3765
3766 if (tcodes->length() < nfids) {
3767 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3768 }
3769
3770 jsize off = 0;
3771 /* loop through fields, setting values */
3772 for (jsize i = 0; i < nfids; i++) {
3773 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3774 int field_offset;
3775 if (fid != NULL) {
3776 // NULL is a legal value for fid, but retrieving the field offset
3777 // trigger assertion in that case
3778 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3779 }
3780
3781 switch (tcodes->char_at(i)) {
3782 case 'Z':
3783 if (fid != NULL) {
3784 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3785 o->bool_field_put(field_offset, val);
3786 }
3787 off++;
3788 break;
3789
3790 case 'B':
3791 if (fid != NULL) {
3792 o->byte_field_put(field_offset, dbuf->byte_at(off));
3793 }
3794 off++;
3795 break;
3796
3797 case 'C':
3798 if (fid != NULL) {
3799 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3800 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3801 o->char_field_put(field_offset, val);
3802 }
3803 off += 2;
3804 break;
3805
3806 case 'S':
3807 if (fid != NULL) {
3808 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3809 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3810 o->short_field_put(field_offset, val);
3811 }
3812 off += 2;
3813 break;
3814
3815 case 'I':
3816 if (fid != NULL) {
3817 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3818 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3819 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3820 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3821 o->int_field_put(field_offset, ival);
3822 }
3823 off += 4;
3824 break;
3825
3826 case 'F':
3827 if (fid != NULL) {
3828 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3829 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3830 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3831 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3832 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3833 o->float_field_put(field_offset, fval);
3834 }
3835 off += 4;
3836 break;
3837
3838 case 'J':
3839 if (fid != NULL) {
3840 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3841 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3842 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3843 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3844 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3845 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3846 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3847 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3848 o->long_field_put(field_offset, lval);
3849 }
3850 off += 8;
3851 break;
3852
3853 case 'D':
3854 if (fid != NULL) {
3855 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3856 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3857 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3858 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3859 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3860 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3861 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3862 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3863 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3864 o->double_field_put(field_offset, dval);
3865 }
3866 off += 8;
3867 break;
3868
3869 default:
3870 // Illegal typecode
3871 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3872 }
3873 }
3874 JVM_END
3875
3876
3877 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3878 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3879 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3880
3881 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3882 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3883 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3884 oop o = JNIHandles::resolve(obj);
3885
3886 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3887 THROW(vmSymbols::java_lang_NullPointerException());
3888 }
3889
3890 jsize nfids = fids->length();
3891 if (nfids == 0) return;
3892
3893 if (tcodes->length() < nfids) {
3894 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3895 }
3896
3897 /* loop through fields, fetching values */
3898 jsize off = 0;
3899 for (jsize i = 0; i < nfids; i++) {
3900 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3901 if (fid == NULL) {
3902 THROW(vmSymbols::java_lang_NullPointerException());
3903 }
3904 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3905
3906 switch (tcodes->char_at(i)) {
3907 case 'Z':
3908 {
3909 jboolean val = o->bool_field(field_offset);
3910 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3911 }
3912 break;
3913
3914 case 'B':
3915 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3916 break;
3917
3918 case 'C':
3919 {
3920 jchar val = o->char_field(field_offset);
3921 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3922 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3923 }
3924 break;
3925
3926 case 'S':
3927 {
3928 jshort val = o->short_field(field_offset);
3929 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3930 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3931 }
3932 break;
3933
3934 case 'I':
3935 {
3936 jint val = o->int_field(field_offset);
3937 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3938 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3939 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3940 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3941 }
3942 break;
3943
3944 case 'F':
3945 {
3946 jfloat fval = o->float_field(field_offset);
3947 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3948 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3949 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3950 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3951 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3952 }
3953 break;
3954
3955 case 'J':
3956 {
3957 jlong val = o->long_field(field_offset);
3958 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3959 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3960 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3961 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3962 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3963 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3964 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3965 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3966 }
3967 break;
3968
3969 case 'D':
3970 {
3971 jdouble dval = o->double_field(field_offset);
3972 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3973 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3974 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3975 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3976 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3977 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3978 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3979 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3980 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3981 }
3982 break;
3983
3984 default:
3985 // Illegal typecode
3986 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3987 }
3988 }
3989 JVM_END
3990
3991
3992 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3993
3994 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3995 // Security Note:
3996 // The Java level wrapper will perform the necessary security check allowing
3997 // us to pass the NULL as the initiating class loader.
3998 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3999
4000 KlassHandle klass_handle(THREAD, klass);
4001 // Check if we should initialize the class
4002 if (init && klass_handle->oop_is_instance()) {
4003 klass_handle->initialize(CHECK_NULL);
4004 }
4005 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4006 }
4007
4008
4009 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4010
4011 #ifndef PRODUCT
4012
4013 extern "C" {
4014 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4015 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4016 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4017 }
4018
4019 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4020 JVMWrapper("JVM_AccessBoolVMFlag");
4021 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4022 JVM_END
4023
4024 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4025 JVMWrapper("JVM_AccessVMIntFlag");
4026 intx v;
4027 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4028 *value = (jint)v;
4029 return result;
4030 JVM_END
4031
4032
4033 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4034 JVMWrapper("JVM_VMBreakPoint");
4035 oop the_obj = JNIHandles::resolve(obj);
4036 BREAKPOINT;
4037 JVM_END
4038
4039
4040 #endif
4041
4042
4043 //---------------------------------------------------------------------------
4044 //
4045 // Support for old native code-based reflection (pre-JDK 1.4)
4046 // Disabled by default in the product build.
4047 //
4048 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
4049 //
4050 //---------------------------------------------------------------------------
4051
4052 #ifdef SUPPORT_OLD_REFLECTION
4053
4054 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
4055 JVMWrapper("JVM_GetClassFields");
4056 JvmtiVMObjectAllocEventCollector oam;
4057 oop mirror = JNIHandles::resolve_non_null(cls);
4058 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
4059 return (jobjectArray) JNIHandles::make_local(env, result);
4060 JVM_END
4061
4062
4063 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
4064 JVMWrapper("JVM_GetClassMethods");
4065 JvmtiVMObjectAllocEventCollector oam;
4066 oop mirror = JNIHandles::resolve_non_null(cls);
4067 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
4068 //%note jvm_r4
4069 return (jobjectArray) JNIHandles::make_local(env, result);
4070 JVM_END
4071
4072
4073 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
4074 JVMWrapper("JVM_GetClassConstructors");
4075 JvmtiVMObjectAllocEventCollector oam;
4076 oop mirror = JNIHandles::resolve_non_null(cls);
4077 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
4078 //%note jvm_r4
4079 return (jobjectArray) JNIHandles::make_local(env, result);
4080 JVM_END
4081
4082
4083 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
4084 JVMWrapper("JVM_GetClassField");
4085 JvmtiVMObjectAllocEventCollector oam;
4086 if (name == NULL) return NULL;
4087 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4088
4089 const char* cstr = java_lang_String::as_utf8_string(str());
4090 symbolHandle field_name =
4091 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4092 if (field_name.is_null()) {
4093 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4094 }
4095
4096 oop mirror = JNIHandles::resolve_non_null(cls);
4097 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
4098 if (result == NULL) {
4099 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
4100 }
4101 return JNIHandles::make_local(env, result);
4102 JVM_END
4103
4104
4105 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
4106 JVMWrapper("JVM_GetClassMethod");
4107 JvmtiVMObjectAllocEventCollector oam;
4108 if (name == NULL) {
4109 THROW_0(vmSymbols::java_lang_NullPointerException());
4110 }
4111 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4112
4113 const char* cstr = java_lang_String::as_utf8_string(str());
4114 symbolHandle method_name =
4115 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4116 if (method_name.is_null()) {
4117 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4118 }
4119
4120 oop mirror = JNIHandles::resolve_non_null(cls);
4121 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4122 oop result = Reflection::reflect_method(mirror, method_name, tarray,
4123 which, CHECK_NULL);
4124 if (result == NULL) {
4125 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4126 }
4127 return JNIHandles::make_local(env, result);
4128 JVM_END
4129
4130
4131 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
4132 JVMWrapper("JVM_GetClassConstructor");
4133 JvmtiVMObjectAllocEventCollector oam;
4134 oop mirror = JNIHandles::resolve_non_null(cls);
4135 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4136 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
4137 if (result == NULL) {
4138 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4139 }
4140 return (jobject) JNIHandles::make_local(env, result);
4141 JVM_END
4142
4143
4144 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4145
4146 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4147 JVMWrapper("JVM_NewInstance");
4148 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4149
4150 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4151 if (resolved_constructor == NULL) {
4152 klassOop k = java_lang_Class::as_klassOop(mirror());
4153 // The java.lang.Class object caches a resolved constructor if all the checks
4154 // below were done successfully and a constructor was found.
4155
4156 // Do class based checks
4157 if (java_lang_Class::is_primitive(mirror())) {
4158 const char* msg = "";
4159 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4160 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4161 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4162 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4163 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4164 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4165 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4166 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4167 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4168 }
4169
4170 // Check whether we are allowed to instantiate this class
4171 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4172 instanceKlassHandle klass(THREAD, k);
4173 // Make sure class is initialized (also so all methods are rewritten)
4174 klass->initialize(CHECK_NULL);
4175
4176 // Lookup default constructor
4177 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4178 if (resolved_constructor == NULL) {
4179 ResourceMark rm(THREAD);
4180 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4181 }
4182
4183 // Cache result in java.lang.Class object. Does not have to be MT safe.
4184 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4185 }
4186
4187 assert(resolved_constructor != NULL, "sanity check");
4188 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4189
4190 // We have an initialized instanceKlass with a default constructor
4191 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4192 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4193
4194 // Do security check
4195 klassOop caller_klass = NULL;
4196 if (UsePrivilegedStack) {
4197 caller_klass = thread->security_get_caller_class(2);
4198
4199 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4200 !Reflection::verify_field_access(caller_klass,
4201 klass(),
4202 klass(),
4203 constructor->access_flags(),
4204 false,
4205 true)) {
4206 ResourceMark rm(THREAD);
4207 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4208 }
4209 }
4210
4211 // Allocate object and call constructor
4212 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4213 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4214
4215 jobject res = JNIHandles::make_local(env, receiver());
4216 if (JvmtiExport::should_post_vm_object_alloc()) {
4217 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4218 }
4219 return res;
4220 JVM_END
4221
4222
4223 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4224
4225 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4226 JVMWrapper("JVM_GetField");
4227 JvmtiVMObjectAllocEventCollector oam;
4228 Handle field_mirror(thread, JNIHandles::resolve(field));
4229 Handle receiver (thread, JNIHandles::resolve(obj));
4230 fieldDescriptor fd;
4231 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4232 jvalue value;
4233 BasicType type = Reflection::field_get(&value, &fd, receiver);
4234 oop box = Reflection::box(&value, type, CHECK_NULL);
4235 return JNIHandles::make_local(env, box);
4236 JVM_END
4237
4238
4239 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4240 JVMWrapper("JVM_GetPrimitiveField");
4241 Handle field_mirror(thread, JNIHandles::resolve(field));
4242 Handle receiver (thread, JNIHandles::resolve(obj));
4243 fieldDescriptor fd;
4244 jvalue value;
4245 value.j = 0;
4246 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4247 BasicType type = Reflection::field_get(&value, &fd, receiver);
4248 BasicType wide_type = (BasicType) wCode;
4249 if (type != wide_type) {
4250 Reflection::widen(&value, type, wide_type, CHECK_(value));
4251 }
4252 return value;
4253 JVM_END // should really be JVM_END, but that doesn't work for union types!
4254
4255
4256 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4257 JVMWrapper("JVM_SetField");
4258 Handle field_mirror(thread, JNIHandles::resolve(field));
4259 Handle receiver (thread, JNIHandles::resolve(obj));
4260 oop box = JNIHandles::resolve(val);
4261 fieldDescriptor fd;
4262 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4263 BasicType field_type = fd.field_type();
4264 jvalue value;
4265 BasicType value_type;
4266 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4267 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4268 value_type = Reflection::unbox_for_regular_object(box, &value);
4269 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4270 } else {
4271 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4272 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4273 }
4274 JVM_END
4275
4276
4277 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4278 JVMWrapper("JVM_SetPrimitiveField");
4279 Handle field_mirror(thread, JNIHandles::resolve(field));
4280 Handle receiver (thread, JNIHandles::resolve(obj));
4281 fieldDescriptor fd;
4282 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4283 BasicType value_type = (BasicType) vCode;
4284 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4285 JVM_END
4286
4287
4288 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4289
4290 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4291 JVMWrapper("JVM_InvokeMethod");
4292 Handle method_handle;
4293 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4294 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4295 Handle receiver(THREAD, JNIHandles::resolve(obj));
4296 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4297 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4298 jobject res = JNIHandles::make_local(env, result);
4299 if (JvmtiExport::should_post_vm_object_alloc()) {
4300 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4301 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4302 if (java_lang_Class::is_primitive(ret_type)) {
4303 // Only for primitive type vm allocates memory for java object.
4304 // See box() method.
4305 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4306 }
4307 }
4308 return res;
4309 } else {
4310 THROW_0(vmSymbols::java_lang_StackOverflowError());
4311 }
4312 JVM_END
4313
4314
4315 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4316 JVMWrapper("JVM_NewInstanceFromConstructor");
4317 oop constructor_mirror = JNIHandles::resolve(c);
4318 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4319 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4320 jobject res = JNIHandles::make_local(env, result);
4321 if (JvmtiExport::should_post_vm_object_alloc()) {
4322 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4323 }
4324 return res;
4325 JVM_END
4326
4327 #endif /* SUPPORT_OLD_REFLECTION */
4328
4329 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4330
4331 JVM_LEAF(jboolean, JVM_SupportsCX8())
4332 JVMWrapper("JVM_SupportsCX8");
4333 return VM_Version::supports_cx8();
4334 JVM_END
4335
4336
4337 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4338 JVMWrapper("JVM_CX8Field");
4339 jlong res;
4340 oop o = JNIHandles::resolve(obj);
4341 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4342 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4343
4344 assert(VM_Version::supports_cx8(), "cx8 not supported");
4345 res = Atomic::cmpxchg(newVal, addr, oldVal);
4346
4347 return res == oldVal;
4348 JVM_END
4349
4350 // DTrace ///////////////////////////////////////////////////////////////////
4351
4352 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4353 JVMWrapper("JVM_DTraceGetVersion");
4354 return (jint)JVM_TRACING_DTRACE_VERSION;
4355 JVM_END
4356
4357 JVM_ENTRY(jlong,JVM_DTraceActivate(
4358 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4359 JVM_DTraceProvider* providers))
4360 JVMWrapper("JVM_DTraceActivate");
4361 return DTraceJSDT::activate(
4362 version, module_name, providers_count, providers, CHECK_0);
4363 JVM_END
4364
4365 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4366 JVMWrapper("JVM_DTraceIsProbeEnabled");
4367 return DTraceJSDT::is_probe_enabled(method);
4368 JVM_END
4369
4370 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4371 JVMWrapper("JVM_DTraceDispose");
4372 DTraceJSDT::dispose(handle);
4373 JVM_END
4374
4375 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4376 JVMWrapper("JVM_DTraceIsSupported");
4377 return DTraceJSDT::is_supported();
4378 JVM_END
4379
4380 // Returns an array of all live Thread objects (VM internal JavaThreads,
4381 // jvmti agent threads, and JNI attaching threads are skipped)
4382 // See CR 6404306 regarding JNI attaching threads
4383 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4384 ResourceMark rm(THREAD);
4385 ThreadsListEnumerator tle(THREAD, false, false);
4386 JvmtiVMObjectAllocEventCollector oam;
4387
4388 int num_threads = tle.num_threads();
4389 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4390 objArrayHandle threads_ah(THREAD, r);
4391
4392 for (int i = 0; i < num_threads; i++) {
4393 Handle h = tle.get_threadObj(i);
4394 threads_ah->obj_at_put(i, h());
4395 }
4396
4397 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4398 JVM_END
4399
4400
4401 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4402 // Return StackTraceElement[][], each element is the stack trace of a thread in
4403 // the corresponding entry in the given threads array
4404 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4405 JVMWrapper("JVM_DumpThreads");
4406 JvmtiVMObjectAllocEventCollector oam;
4407
4408 // Check if threads is null
4409 if (threads == NULL) {
4410 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4411 }
4412
4413 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4414 objArrayHandle ah(THREAD, a);
4415 int num_threads = ah->length();
4416 // check if threads is non-empty array
4417 if (num_threads == 0) {
4418 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4419 }
4420
4421 // check if threads is not an array of objects of Thread class
4422 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4423 if (k != SystemDictionary::Thread_klass()) {
4424 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4425 }
4426
4427 ResourceMark rm(THREAD);
4428
4429 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4430 for (int i = 0; i < num_threads; i++) {
4431 oop thread_obj = ah->obj_at(i);
4432 instanceHandle h(THREAD, (instanceOop) thread_obj);
4433 thread_handle_array->append(h);
4434 }
4435
4436 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4437 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4438
4439 JVM_END
4440
4441 // JVM monitoring and management support
4442 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4443 return Management::get_jmm_interface(version);
4444 JVM_END
4445
4446 // com.sun.tools.attach.VirtualMachine agent properties support
4447 //
4448 // Initialize the agent properties with the properties maintained in the VM
4449 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4450 JVMWrapper("JVM_InitAgentProperties");
4451 ResourceMark rm;
4452
4453 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4454
4455 PUTPROP(props, "sun.java.command", Arguments::java_command());
4456 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4457 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4458 return properties;
4459 JVM_END
4460
4461 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4462 {
4463 JVMWrapper("JVM_GetEnclosingMethodInfo");
4464 JvmtiVMObjectAllocEventCollector oam;
4465
4466 if (ofClass == NULL) {
4467 return NULL;
4468 }
4469 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4470 // Special handling for primitive objects
4471 if (java_lang_Class::is_primitive(mirror())) {
4472 return NULL;
4473 }
4474 klassOop k = java_lang_Class::as_klassOop(mirror());
4475 if (!Klass::cast(k)->oop_is_instance()) {
4476 return NULL;
4477 }
4478 instanceKlassHandle ik_h(THREAD, k);
4479 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4480 if (encl_method_class_idx == 0) {
4481 return NULL;
4482 }
4483 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4484 objArrayHandle dest(THREAD, dest_o);
4485 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4486 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4487 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4488 if (encl_method_method_idx != 0) {
4489 symbolOop sym_o = ik_h->constants()->symbol_at(
4490 extract_low_short_from_int(
4491 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4492 symbolHandle sym(THREAD, sym_o);
4493 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4494 dest->obj_at_put(1, str());
4495 sym_o = ik_h->constants()->symbol_at(
4496 extract_high_short_from_int(
4497 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4498 sym = symbolHandle(THREAD, sym_o);
4499 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4500 dest->obj_at_put(2, str());
4501 }
4502 return (jobjectArray) JNIHandles::make_local(dest());
4503 }
4504 JVM_END
4505
4506 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4507 jint javaThreadState))
4508 {
4509 // If new thread states are added in future JDK and VM versions,
4510 // this should check if the JDK version is compatible with thread
4511 // states supported by the VM. Return NULL if not compatible.
4512 //
4513 // This function must map the VM java_lang_Thread::ThreadStatus
4514 // to the Java thread state that the JDK supports.
4515 //
4516
4517 typeArrayHandle values_h;
4518 switch (javaThreadState) {
4519 case JAVA_THREAD_STATE_NEW : {
4520 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4521 values_h = typeArrayHandle(THREAD, r);
4522 values_h->int_at_put(0, java_lang_Thread::NEW);
4523 break;
4524 }
4525 case JAVA_THREAD_STATE_RUNNABLE : {
4526 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4527 values_h = typeArrayHandle(THREAD, r);
4528 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4529 break;
4530 }
4531 case JAVA_THREAD_STATE_BLOCKED : {
4532 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4533 values_h = typeArrayHandle(THREAD, r);
4534 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4535 break;
4536 }
4537 case JAVA_THREAD_STATE_WAITING : {
4538 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4539 values_h = typeArrayHandle(THREAD, r);
4540 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4541 values_h->int_at_put(1, java_lang_Thread::PARKED);
4542 break;
4543 }
4544 case JAVA_THREAD_STATE_TIMED_WAITING : {
4545 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4546 values_h = typeArrayHandle(THREAD, r);
4547 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4548 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4549 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4550 break;
4551 }
4552 case JAVA_THREAD_STATE_TERMINATED : {
4553 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4554 values_h = typeArrayHandle(THREAD, r);
4555 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4556 break;
4557 }
4558 default:
4559 // Unknown state - probably incompatible JDK version
4560 return NULL;
4561 }
4562
4563 return (jintArray) JNIHandles::make_local(env, values_h());
4564 }
4565 JVM_END
4566
4567
4568 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4569 jint javaThreadState,
4570 jintArray values))
4571 {
4572 // If new thread states are added in future JDK and VM versions,
4573 // this should check if the JDK version is compatible with thread
4574 // states supported by the VM. Return NULL if not compatible.
4575 //
4576 // This function must map the VM java_lang_Thread::ThreadStatus
4577 // to the Java thread state that the JDK supports.
4578 //
4579
4580 ResourceMark rm;
4581
4582 // Check if threads is null
4583 if (values == NULL) {
4584 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4585 }
4586
4587 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4588 typeArrayHandle values_h(THREAD, v);
4589
4590 objArrayHandle names_h;
4591 switch (javaThreadState) {
4592 case JAVA_THREAD_STATE_NEW : {
4593 assert(values_h->length() == 1 &&
4594 values_h->int_at(0) == java_lang_Thread::NEW,
4595 "Invalid threadStatus value");
4596
4597 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4598 1, /* only 1 substate */
4599 CHECK_NULL);
4600 names_h = objArrayHandle(THREAD, r);
4601 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4602 names_h->obj_at_put(0, name());
4603 break;
4604 }
4605 case JAVA_THREAD_STATE_RUNNABLE : {
4606 assert(values_h->length() == 1 &&
4607 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4608 "Invalid threadStatus value");
4609
4610 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4611 1, /* only 1 substate */
4612 CHECK_NULL);
4613 names_h = objArrayHandle(THREAD, r);
4614 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4615 names_h->obj_at_put(0, name());
4616 break;
4617 }
4618 case JAVA_THREAD_STATE_BLOCKED : {
4619 assert(values_h->length() == 1 &&
4620 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4621 "Invalid threadStatus value");
4622
4623 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4624 1, /* only 1 substate */
4625 CHECK_NULL);
4626 names_h = objArrayHandle(THREAD, r);
4627 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4628 names_h->obj_at_put(0, name());
4629 break;
4630 }
4631 case JAVA_THREAD_STATE_WAITING : {
4632 assert(values_h->length() == 2 &&
4633 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4634 values_h->int_at(1) == java_lang_Thread::PARKED,
4635 "Invalid threadStatus value");
4636 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4637 2, /* number of substates */
4638 CHECK_NULL);
4639 names_h = objArrayHandle(THREAD, r);
4640 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4641 CHECK_NULL);
4642 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4643 CHECK_NULL);
4644 names_h->obj_at_put(0, name0());
4645 names_h->obj_at_put(1, name1());
4646 break;
4647 }
4648 case JAVA_THREAD_STATE_TIMED_WAITING : {
4649 assert(values_h->length() == 3 &&
4650 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4651 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4652 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4653 "Invalid threadStatus value");
4654 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4655 3, /* number of substates */
4656 CHECK_NULL);
4657 names_h = objArrayHandle(THREAD, r);
4658 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4659 CHECK_NULL);
4660 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4661 CHECK_NULL);
4662 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4663 CHECK_NULL);
4664 names_h->obj_at_put(0, name0());
4665 names_h->obj_at_put(1, name1());
4666 names_h->obj_at_put(2, name2());
4667 break;
4668 }
4669 case JAVA_THREAD_STATE_TERMINATED : {
4670 assert(values_h->length() == 1 &&
4671 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4672 "Invalid threadStatus value");
4673 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4674 1, /* only 1 substate */
4675 CHECK_NULL);
4676 names_h = objArrayHandle(THREAD, r);
4677 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4678 names_h->obj_at_put(0, name());
4679 break;
4680 }
4681 default:
4682 // Unknown state - probably incompatible JDK version
4683 return NULL;
4684 }
4685 return (jobjectArray) JNIHandles::make_local(env, names_h());
4686 }
4687 JVM_END
4688
4689 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4690 {
4691 memset(info, 0, sizeof(info_size));
4692
4693 info->jvm_version = Abstract_VM_Version::jvm_version();
4694 info->update_version = 0; /* 0 in HotSpot Express VM */
4695 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4696
4697 // when we add a new capability in the jvm_version_info struct, we should also
4698 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4699 // counter defined in runtimeService.cpp.
4700 info->is_attachable = AttachListener::is_attach_supported();
4701 #ifdef KERNEL
4702 info->is_kernel_jvm = 1; // true;
4703 #else // KERNEL
4704 info->is_kernel_jvm = 0; // false;
4705 #endif // KERNEL
4706 }
4707 JVM_END