1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/fieldStreams.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayKlass.hpp"
38 #include "prims/jvm.h"
39 #include "prims/jvm_misc.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "prims/jvmtiThreadState.hpp"
42 #include "prims/nativeLookup.hpp"
43 #include "prims/privilegedStack.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/dtraceJSDT.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/init.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/jfieldIDWorkaround.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/perfData.hpp"
54 #include "runtime/reflection.hpp"
55 #include "runtime/vframe.hpp"
56 #include "runtime/vm_operations.hpp"
57 #include "services/attachListener.hpp"
58 #include "services/management.hpp"
59 #include "services/threadService.hpp"
60 #include "utilities/copy.hpp"
61 #include "utilities/defaultStream.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/histogram.hpp"
65 #include "utilities/top.hpp"
66 #include "utilities/utf8.hpp"
67 #ifdef TARGET_OS_FAMILY_linux
68 # include "jvm_linux.h"
69 #endif
70 #ifdef TARGET_OS_FAMILY_solaris
71 # include "jvm_solaris.h"
72 #endif
73 #ifdef TARGET_OS_FAMILY_windows
74 # include "jvm_windows.h"
75 #endif
76 #ifdef TARGET_OS_FAMILY_bsd
77 # include "jvm_bsd.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 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
132 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
133 TempNewSymbol privileged_action = SymbolTable::new_symbol("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 Symbol* 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 vmSymbols::put_name(),
319 vmSymbols::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 (jint)os::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 os::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) > Symbol::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 TempNewSymbol h_name = SymbolTable::new_symbol(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) > Symbol::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 TempNewSymbol h_name = SymbolTable::new_symbol(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) > Symbol::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 TempNewSymbol h_name = SymbolTable::new_symbol(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 TempNewSymbol class_name = NULL;
846 if (name != NULL) {
847 const int str_len = (int)strlen(name);
848 if (str_len > Symbol::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 = SymbolTable::new_symbol(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 > Symbol::max_length()) {
913 // It's impossible to create this class; the name cannot fit
914 // into the constant pool.
915 return NULL;
916 }
917 TempNewSymbol klass_name = SymbolTable::new_symbol(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(vmSymbols::java_security_PrivilegedActionException(),
1163 vmSymbols::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 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1460 if (sym == 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())->field_offset(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 // 4496456 We need to filter out java.lang.Throwable.backtrace
1601 bool skip_backtrace = false;
1602
1603 // Allocate result
1604 int num_fields;
1605
1606 if (publicOnly) {
1607 num_fields = 0;
1608 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1609 if (fs.access_flags().is_public()) ++num_fields;
1610 }
1611 } else {
1612 num_fields = k->java_fields_count();
1613
1614 if (k() == SystemDictionary::Throwable_klass()) {
1615 num_fields--;
1616 skip_backtrace = true;
1617 }
1618 }
1619
1620 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1621 objArrayHandle result (THREAD, r);
1622
1623 int out_idx = 0;
1624 fieldDescriptor fd;
1625 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1626 if (skip_backtrace) {
1627 // 4496456 skip java.lang.Throwable.backtrace
1628 int offset = fs.offset();
1629 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1630 }
1631
1632 if (!publicOnly || fs.access_flags().is_public()) {
1633 fd.initialize(k(), fs.index());
1634 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1635 result->obj_at_put(out_idx, field);
1636 ++out_idx;
1637 }
1638 }
1639 assert(out_idx == num_fields, "just checking");
1640 return (jobjectArray) JNIHandles::make_local(env, result());
1641 }
1642 JVM_END
1643
1644 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1645 {
1646 JVMWrapper("JVM_GetClassDeclaredMethods");
1647 JvmtiVMObjectAllocEventCollector oam;
1648
1649 // Exclude primitive types and array types
1650 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1651 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1652 // Return empty array
1653 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1654 return (jobjectArray) JNIHandles::make_local(env, res);
1655 }
1656
1657 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1658
1659 // Ensure class is linked
1660 k->link_class(CHECK_NULL);
1661
1662 objArrayHandle methods (THREAD, k->methods());
1663 int methods_length = methods->length();
1664 int num_methods = 0;
1665
1666 int i;
1667 for (i = 0; i < methods_length; i++) {
1668 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1669 if (!method->is_initializer()) {
1670 if (!publicOnly || method->is_public()) {
1671 ++num_methods;
1672 }
1673 }
1674 }
1675
1676 // Allocate result
1677 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1678 objArrayHandle result (THREAD, r);
1679
1680 int out_idx = 0;
1681 for (i = 0; i < methods_length; i++) {
1682 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1683 if (!method->is_initializer()) {
1684 if (!publicOnly || method->is_public()) {
1685 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1686 result->obj_at_put(out_idx, m);
1687 ++out_idx;
1688 }
1689 }
1690 }
1691 assert(out_idx == num_methods, "just checking");
1692 return (jobjectArray) JNIHandles::make_local(env, result());
1693 }
1694 JVM_END
1695
1696 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1697 {
1698 JVMWrapper("JVM_GetClassDeclaredConstructors");
1699 JvmtiVMObjectAllocEventCollector oam;
1700
1701 // Exclude primitive types and array types
1702 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1703 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1704 // Return empty array
1705 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1706 return (jobjectArray) JNIHandles::make_local(env, res);
1707 }
1708
1709 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1710
1711 // Ensure class is linked
1712 k->link_class(CHECK_NULL);
1713
1714 objArrayHandle methods (THREAD, k->methods());
1715 int methods_length = methods->length();
1716 int num_constructors = 0;
1717
1718 int i;
1719 for (i = 0; i < methods_length; i++) {
1720 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1721 if (method->is_initializer() && !method->is_static()) {
1722 if (!publicOnly || method->is_public()) {
1723 ++num_constructors;
1724 }
1725 }
1726 }
1727
1728 // Allocate result
1729 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1730 objArrayHandle result(THREAD, r);
1731
1732 int out_idx = 0;
1733 for (i = 0; i < methods_length; i++) {
1734 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1735 if (method->is_initializer() && !method->is_static()) {
1736 if (!publicOnly || method->is_public()) {
1737 oop m = Reflection::new_constructor(method, CHECK_NULL);
1738 result->obj_at_put(out_idx, m);
1739 ++out_idx;
1740 }
1741 }
1742 }
1743 assert(out_idx == num_constructors, "just checking");
1744 return (jobjectArray) JNIHandles::make_local(env, result());
1745 }
1746 JVM_END
1747
1748 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1749 {
1750 JVMWrapper("JVM_GetClassAccessFlags");
1751 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1752 // Primitive type
1753 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1754 }
1755
1756 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1757 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1758 }
1759 JVM_END
1760
1761
1762 // Constant pool access //////////////////////////////////////////////////////////
1763
1764 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1765 {
1766 JVMWrapper("JVM_GetClassConstantPool");
1767 JvmtiVMObjectAllocEventCollector oam;
1768
1769 // Return null for primitives and arrays
1770 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1771 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1772 if (Klass::cast(k)->oop_is_instance()) {
1773 instanceKlassHandle k_h(THREAD, k);
1774 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1775 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1776 return JNIHandles::make_local(jcp());
1777 }
1778 }
1779 return NULL;
1780 }
1781 JVM_END
1782
1783
1784 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1785 {
1786 JVMWrapper("JVM_ConstantPoolGetSize");
1787 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1788 return cp->length();
1789 }
1790 JVM_END
1791
1792
1793 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1794 if (!cp->is_within_bounds(index)) {
1795 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1796 }
1797 }
1798
1799
1800 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1801 {
1802 JVMWrapper("JVM_ConstantPoolGetClassAt");
1803 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1804 bounds_check(cp, index, CHECK_NULL);
1805 constantTag tag = cp->tag_at(index);
1806 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1807 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1808 }
1809 klassOop k = cp->klass_at(index, CHECK_NULL);
1810 return (jclass) JNIHandles::make_local(k->java_mirror());
1811 }
1812 JVM_END
1813
1814
1815 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1816 {
1817 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1818 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1819 bounds_check(cp, index, CHECK_NULL);
1820 constantTag tag = cp->tag_at(index);
1821 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1822 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1823 }
1824 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1825 if (k == NULL) return NULL;
1826 return (jclass) JNIHandles::make_local(k->java_mirror());
1827 }
1828 JVM_END
1829
1830 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1831 constantTag tag = cp->tag_at(index);
1832 if (!tag.is_method() && !tag.is_interface_method()) {
1833 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1834 }
1835 int klass_ref = cp->uncached_klass_ref_index_at(index);
1836 klassOop k_o;
1837 if (force_resolution) {
1838 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1839 } else {
1840 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1841 if (k_o == NULL) return NULL;
1842 }
1843 instanceKlassHandle k(THREAD, k_o);
1844 Symbol* name = cp->uncached_name_ref_at(index);
1845 Symbol* sig = cp->uncached_signature_ref_at(index);
1846 methodHandle m (THREAD, k->find_method(name, sig));
1847 if (m.is_null()) {
1848 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1849 }
1850 oop method;
1851 if (!m->is_initializer() || m->is_static()) {
1852 method = Reflection::new_method(m, true, true, CHECK_NULL);
1853 } else {
1854 method = Reflection::new_constructor(m, CHECK_NULL);
1855 }
1856 return JNIHandles::make_local(method);
1857 }
1858
1859 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1860 {
1861 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1862 JvmtiVMObjectAllocEventCollector oam;
1863 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1864 bounds_check(cp, index, CHECK_NULL);
1865 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1866 return res;
1867 }
1868 JVM_END
1869
1870 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1871 {
1872 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1873 JvmtiVMObjectAllocEventCollector oam;
1874 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1875 bounds_check(cp, index, CHECK_NULL);
1876 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1877 return res;
1878 }
1879 JVM_END
1880
1881 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1882 constantTag tag = cp->tag_at(index);
1883 if (!tag.is_field()) {
1884 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1885 }
1886 int klass_ref = cp->uncached_klass_ref_index_at(index);
1887 klassOop k_o;
1888 if (force_resolution) {
1889 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1890 } else {
1891 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1892 if (k_o == NULL) return NULL;
1893 }
1894 instanceKlassHandle k(THREAD, k_o);
1895 Symbol* name = cp->uncached_name_ref_at(index);
1896 Symbol* sig = cp->uncached_signature_ref_at(index);
1897 fieldDescriptor fd;
1898 klassOop target_klass = k->find_field(name, sig, &fd);
1899 if (target_klass == NULL) {
1900 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1901 }
1902 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1903 return JNIHandles::make_local(field);
1904 }
1905
1906 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1907 {
1908 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1909 JvmtiVMObjectAllocEventCollector oam;
1910 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1911 bounds_check(cp, index, CHECK_NULL);
1912 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1913 return res;
1914 }
1915 JVM_END
1916
1917 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1918 {
1919 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1920 JvmtiVMObjectAllocEventCollector oam;
1921 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1922 bounds_check(cp, index, CHECK_NULL);
1923 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1924 return res;
1925 }
1926 JVM_END
1927
1928 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1929 {
1930 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1931 JvmtiVMObjectAllocEventCollector oam;
1932 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1933 bounds_check(cp, index, CHECK_NULL);
1934 constantTag tag = cp->tag_at(index);
1935 if (!tag.is_field_or_method()) {
1936 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1937 }
1938 int klass_ref = cp->uncached_klass_ref_index_at(index);
1939 Symbol* klass_name = cp->klass_name_at(klass_ref);
1940 Symbol* member_name = cp->uncached_name_ref_at(index);
1941 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1942 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1943 objArrayHandle dest(THREAD, dest_o);
1944 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1945 dest->obj_at_put(0, str());
1946 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1947 dest->obj_at_put(1, str());
1948 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1949 dest->obj_at_put(2, str());
1950 return (jobjectArray) JNIHandles::make_local(dest());
1951 }
1952 JVM_END
1953
1954 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1955 {
1956 JVMWrapper("JVM_ConstantPoolGetIntAt");
1957 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1958 bounds_check(cp, index, CHECK_0);
1959 constantTag tag = cp->tag_at(index);
1960 if (!tag.is_int()) {
1961 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1962 }
1963 return cp->int_at(index);
1964 }
1965 JVM_END
1966
1967 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1968 {
1969 JVMWrapper("JVM_ConstantPoolGetLongAt");
1970 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1971 bounds_check(cp, index, CHECK_(0L));
1972 constantTag tag = cp->tag_at(index);
1973 if (!tag.is_long()) {
1974 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1975 }
1976 return cp->long_at(index);
1977 }
1978 JVM_END
1979
1980 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1981 {
1982 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1983 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1984 bounds_check(cp, index, CHECK_(0.0f));
1985 constantTag tag = cp->tag_at(index);
1986 if (!tag.is_float()) {
1987 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1988 }
1989 return cp->float_at(index);
1990 }
1991 JVM_END
1992
1993 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1994 {
1995 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1996 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1997 bounds_check(cp, index, CHECK_(0.0));
1998 constantTag tag = cp->tag_at(index);
1999 if (!tag.is_double()) {
2000 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2001 }
2002 return cp->double_at(index);
2003 }
2004 JVM_END
2005
2006 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2007 {
2008 JVMWrapper("JVM_ConstantPoolGetStringAt");
2009 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2010 bounds_check(cp, index, CHECK_NULL);
2011 constantTag tag = cp->tag_at(index);
2012 if (!tag.is_string() && !tag.is_unresolved_string()) {
2013 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2014 }
2015 oop str = cp->string_at(index, CHECK_NULL);
2016 return (jstring) JNIHandles::make_local(str);
2017 }
2018 JVM_END
2019
2020 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2021 {
2022 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2023 JvmtiVMObjectAllocEventCollector oam;
2024 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2025 bounds_check(cp, index, CHECK_NULL);
2026 constantTag tag = cp->tag_at(index);
2027 if (!tag.is_symbol()) {
2028 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2029 }
2030 Symbol* sym = cp->symbol_at(index);
2031 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2032 return (jstring) JNIHandles::make_local(str());
2033 }
2034 JVM_END
2035
2036
2037 // Assertion support. //////////////////////////////////////////////////////////
2038
2039 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2040 JVMWrapper("JVM_DesiredAssertionStatus");
2041 assert(cls != NULL, "bad class");
2042
2043 oop r = JNIHandles::resolve(cls);
2044 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2045 if (java_lang_Class::is_primitive(r)) return false;
2046
2047 klassOop k = java_lang_Class::as_klassOop(r);
2048 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2049 if (! Klass::cast(k)->oop_is_instance()) return false;
2050
2051 ResourceMark rm(THREAD);
2052 const char* name = Klass::cast(k)->name()->as_C_string();
2053 bool system_class = Klass::cast(k)->class_loader() == NULL;
2054 return JavaAssertions::enabled(name, system_class);
2055
2056 JVM_END
2057
2058
2059 // Return a new AssertionStatusDirectives object with the fields filled in with
2060 // command-line assertion arguments (i.e., -ea, -da).
2061 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2062 JVMWrapper("JVM_AssertionStatusDirectives");
2063 JvmtiVMObjectAllocEventCollector oam;
2064 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2065 return JNIHandles::make_local(env, asd);
2066 JVM_END
2067
2068 // Verification ////////////////////////////////////////////////////////////////////////////////
2069
2070 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2071
2072 // RedefineClasses support: bug 6214132 caused verification to fail.
2073 // All functions from this section should call the jvmtiThreadSate function:
2074 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2075 // The function returns a klassOop of the _scratch_class if the verifier
2076 // was invoked in the middle of the class redefinition.
2077 // Otherwise it returns its argument value which is the _the_class klassOop.
2078 // Please, refer to the description in the jvmtiThreadSate.hpp.
2079
2080 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2081 JVMWrapper("JVM_GetClassNameUTF");
2082 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2083 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2084 return Klass::cast(k)->name()->as_utf8();
2085 JVM_END
2086
2087
2088 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2089 JVMWrapper("JVM_GetClassCPTypes");
2090 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2091 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2092 // types will have length zero if this is not an instanceKlass
2093 // (length is determined by call to JVM_GetClassCPEntriesCount)
2094 if (Klass::cast(k)->oop_is_instance()) {
2095 constantPoolOop cp = instanceKlass::cast(k)->constants();
2096 for (int index = cp->length() - 1; index >= 0; index--) {
2097 constantTag tag = cp->tag_at(index);
2098 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2099 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2100 }
2101 }
2102 JVM_END
2103
2104
2105 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2106 JVMWrapper("JVM_GetClassCPEntriesCount");
2107 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2108 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2109 if (!Klass::cast(k)->oop_is_instance())
2110 return 0;
2111 return instanceKlass::cast(k)->constants()->length();
2112 JVM_END
2113
2114
2115 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2116 JVMWrapper("JVM_GetClassFieldsCount");
2117 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2118 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2119 if (!Klass::cast(k)->oop_is_instance())
2120 return 0;
2121 return instanceKlass::cast(k)->java_fields_count();
2122 JVM_END
2123
2124
2125 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2126 JVMWrapper("JVM_GetClassMethodsCount");
2127 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2128 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2129 if (!Klass::cast(k)->oop_is_instance())
2130 return 0;
2131 return instanceKlass::cast(k)->methods()->length();
2132 JVM_END
2133
2134
2135 // The following methods, used for the verifier, are never called with
2136 // array klasses, so a direct cast to instanceKlass is safe.
2137 // Typically, these methods are called in a loop with bounds determined
2138 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2139 // zero for arrays.
2140 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2141 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2142 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2143 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2144 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2145 int length = methodOop(method)->checked_exceptions_length();
2146 if (length > 0) {
2147 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2148 for (int i = 0; i < length; i++) {
2149 exceptions[i] = table[i].class_cp_index;
2150 }
2151 }
2152 JVM_END
2153
2154
2155 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2156 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2157 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2158 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2159 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2160 return methodOop(method)->checked_exceptions_length();
2161 JVM_END
2162
2163
2164 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2165 JVMWrapper("JVM_GetMethodIxByteCode");
2166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2168 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2169 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2170 JVM_END
2171
2172
2173 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2174 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2175 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2176 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2177 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2178 return methodOop(method)->code_size();
2179 JVM_END
2180
2181
2182 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2183 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2184 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2185 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2186 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2187 typeArrayOop extable = methodOop(method)->exception_table();
2188 entry->start_pc = extable->int_at(entry_index * 4);
2189 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2190 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2191 entry->catchType = extable->int_at(entry_index * 4 + 3);
2192 JVM_END
2193
2194
2195 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2196 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2197 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2198 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2199 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2200 return methodOop(method)->exception_table()->length() / 4;
2201 JVM_END
2202
2203
2204 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2205 JVMWrapper("JVM_GetMethodIxModifiers");
2206 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2207 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2208 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2209 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2210 JVM_END
2211
2212
2213 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2214 JVMWrapper("JVM_GetFieldIxModifiers");
2215 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2216 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2217 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2218 JVM_END
2219
2220
2221 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2222 JVMWrapper("JVM_GetMethodIxLocalsCount");
2223 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2224 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2225 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2226 return methodOop(method)->max_locals();
2227 JVM_END
2228
2229
2230 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2231 JVMWrapper("JVM_GetMethodIxArgsSize");
2232 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2233 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2234 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2235 return methodOop(method)->size_of_parameters();
2236 JVM_END
2237
2238
2239 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2240 JVMWrapper("JVM_GetMethodIxMaxStack");
2241 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2242 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2243 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2244 return methodOop(method)->max_stack();
2245 JVM_END
2246
2247
2248 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2249 JVMWrapper("JVM_IsConstructorIx");
2250 ResourceMark rm(THREAD);
2251 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2252 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2253 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2254 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2255 JVM_END
2256
2257
2258 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2259 JVMWrapper("JVM_GetMethodIxIxUTF");
2260 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2261 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2262 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2263 return methodOop(method)->name()->as_utf8();
2264 JVM_END
2265
2266
2267 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2268 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2269 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2270 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2271 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2272 return methodOop(method)->signature()->as_utf8();
2273 JVM_END
2274
2275 /**
2276 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2277 * read entries in the constant pool. Since the old verifier always
2278 * works on a copy of the code, it will not see any rewriting that
2279 * may possibly occur in the middle of verification. So it is important
2280 * that nothing it calls tries to use the cpCache instead of the raw
2281 * constant pool, so we must use cp->uncached_x methods when appropriate.
2282 */
2283 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2284 JVMWrapper("JVM_GetCPFieldNameUTF");
2285 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287 constantPoolOop cp = instanceKlass::cast(k)->constants();
2288 switch (cp->tag_at(cp_index).value()) {
2289 case JVM_CONSTANT_Fieldref:
2290 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2291 default:
2292 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2293 }
2294 ShouldNotReachHere();
2295 return NULL;
2296 JVM_END
2297
2298
2299 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2300 JVMWrapper("JVM_GetCPMethodNameUTF");
2301 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2302 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2303 constantPoolOop cp = instanceKlass::cast(k)->constants();
2304 switch (cp->tag_at(cp_index).value()) {
2305 case JVM_CONSTANT_InterfaceMethodref:
2306 case JVM_CONSTANT_Methodref:
2307 case JVM_CONSTANT_NameAndType: // for invokedynamic
2308 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2309 default:
2310 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2311 }
2312 ShouldNotReachHere();
2313 return NULL;
2314 JVM_END
2315
2316
2317 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2318 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2319 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 constantPoolOop cp = instanceKlass::cast(k)->constants();
2322 switch (cp->tag_at(cp_index).value()) {
2323 case JVM_CONSTANT_InterfaceMethodref:
2324 case JVM_CONSTANT_Methodref:
2325 case JVM_CONSTANT_NameAndType: // for invokedynamic
2326 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2327 default:
2328 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2329 }
2330 ShouldNotReachHere();
2331 return NULL;
2332 JVM_END
2333
2334
2335 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2336 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2337 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 constantPoolOop cp = instanceKlass::cast(k)->constants();
2340 switch (cp->tag_at(cp_index).value()) {
2341 case JVM_CONSTANT_Fieldref:
2342 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2343 default:
2344 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2345 }
2346 ShouldNotReachHere();
2347 return NULL;
2348 JVM_END
2349
2350
2351 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2352 JVMWrapper("JVM_GetCPClassNameUTF");
2353 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2354 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2355 constantPoolOop cp = instanceKlass::cast(k)->constants();
2356 Symbol* classname = cp->klass_name_at(cp_index);
2357 return classname->as_utf8();
2358 JVM_END
2359
2360
2361 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2362 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2363 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2364 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365 constantPoolOop cp = instanceKlass::cast(k)->constants();
2366 switch (cp->tag_at(cp_index).value()) {
2367 case JVM_CONSTANT_Fieldref: {
2368 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2369 Symbol* classname = cp->klass_name_at(class_index);
2370 return classname->as_utf8();
2371 }
2372 default:
2373 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2374 }
2375 ShouldNotReachHere();
2376 return NULL;
2377 JVM_END
2378
2379
2380 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2381 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2382 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2383 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2384 constantPoolOop cp = instanceKlass::cast(k)->constants();
2385 switch (cp->tag_at(cp_index).value()) {
2386 case JVM_CONSTANT_Methodref:
2387 case JVM_CONSTANT_InterfaceMethodref: {
2388 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2389 Symbol* classname = cp->klass_name_at(class_index);
2390 return classname->as_utf8();
2391 }
2392 default:
2393 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2394 }
2395 ShouldNotReachHere();
2396 return NULL;
2397 JVM_END
2398
2399
2400 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2401 JVMWrapper("JVM_GetCPFieldModifiers");
2402 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2403 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2404 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2406 constantPoolOop cp = instanceKlass::cast(k)->constants();
2407 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2408 switch (cp->tag_at(cp_index).value()) {
2409 case JVM_CONSTANT_Fieldref: {
2410 Symbol* name = cp->uncached_name_ref_at(cp_index);
2411 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2412 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2413 if (fs.name() == name && fs.signature() == signature) {
2414 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2415 }
2416 }
2417 return -1;
2418 }
2419 default:
2420 fatal("JVM_GetCPFieldModifiers: illegal constant");
2421 }
2422 ShouldNotReachHere();
2423 return 0;
2424 JVM_END
2425
2426
2427 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2428 JVMWrapper("JVM_GetCPMethodModifiers");
2429 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2430 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2433 constantPoolOop cp = instanceKlass::cast(k)->constants();
2434 switch (cp->tag_at(cp_index).value()) {
2435 case JVM_CONSTANT_Methodref:
2436 case JVM_CONSTANT_InterfaceMethodref: {
2437 Symbol* name = cp->uncached_name_ref_at(cp_index);
2438 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2439 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2440 int methods_count = methods->length();
2441 for (int i = 0; i < methods_count; i++) {
2442 methodOop method = methodOop(methods->obj_at(i));
2443 if (method->name() == name && method->signature() == signature) {
2444 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2445 }
2446 }
2447 return -1;
2448 }
2449 default:
2450 fatal("JVM_GetCPMethodModifiers: illegal constant");
2451 }
2452 ShouldNotReachHere();
2453 return 0;
2454 JVM_END
2455
2456
2457 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2458
2459 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2460 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2461 JVM_END
2462
2463
2464 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2465 JVMWrapper("JVM_IsSameClassPackage");
2466 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2467 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2468 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2469 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2470 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2471 JVM_END
2472
2473
2474 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2475
2476 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2477 JVMWrapper2("JVM_Open (%s)", fname);
2478
2479 //%note jvm_r6
2480 int result = os::open(fname, flags, mode);
2481 if (result >= 0) {
2482 return result;
2483 } else {
2484 switch(errno) {
2485 case EEXIST:
2486 return JVM_EEXIST;
2487 default:
2488 return -1;
2489 }
2490 }
2491 JVM_END
2492
2493
2494 JVM_LEAF(jint, JVM_Close(jint fd))
2495 JVMWrapper2("JVM_Close (0x%x)", fd);
2496 //%note jvm_r6
2497 return os::close(fd);
2498 JVM_END
2499
2500
2501 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2502 JVMWrapper2("JVM_Read (0x%x)", fd);
2503
2504 //%note jvm_r6
2505 return (jint)os::restartable_read(fd, buf, nbytes);
2506 JVM_END
2507
2508
2509 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2510 JVMWrapper2("JVM_Write (0x%x)", fd);
2511
2512 //%note jvm_r6
2513 return (jint)os::write(fd, buf, nbytes);
2514 JVM_END
2515
2516
2517 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2518 JVMWrapper2("JVM_Available (0x%x)", fd);
2519 //%note jvm_r6
2520 return os::available(fd, pbytes);
2521 JVM_END
2522
2523
2524 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2525 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2526 //%note jvm_r6
2527 return os::lseek(fd, offset, whence);
2528 JVM_END
2529
2530
2531 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2532 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2533 return os::ftruncate(fd, length);
2534 JVM_END
2535
2536
2537 JVM_LEAF(jint, JVM_Sync(jint fd))
2538 JVMWrapper2("JVM_Sync (0x%x)", fd);
2539 //%note jvm_r6
2540 return os::fsync(fd);
2541 JVM_END
2542
2543
2544 // Printing support //////////////////////////////////////////////////
2545 extern "C" {
2546
2547 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2548 // see bug 4399518, 4417214
2549 if ((intptr_t)count <= 0) return -1;
2550 return vsnprintf(str, count, fmt, args);
2551 }
2552
2553
2554 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2555 va_list args;
2556 int len;
2557 va_start(args, fmt);
2558 len = jio_vsnprintf(str, count, fmt, args);
2559 va_end(args);
2560 return len;
2561 }
2562
2563
2564 int jio_fprintf(FILE* f, const char *fmt, ...) {
2565 int len;
2566 va_list args;
2567 va_start(args, fmt);
2568 len = jio_vfprintf(f, fmt, args);
2569 va_end(args);
2570 return len;
2571 }
2572
2573
2574 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2575 if (Arguments::vfprintf_hook() != NULL) {
2576 return Arguments::vfprintf_hook()(f, fmt, args);
2577 } else {
2578 return vfprintf(f, fmt, args);
2579 }
2580 }
2581
2582
2583 JNIEXPORT int jio_printf(const char *fmt, ...) {
2584 int len;
2585 va_list args;
2586 va_start(args, fmt);
2587 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2588 va_end(args);
2589 return len;
2590 }
2591
2592
2593 // HotSpot specific jio method
2594 void jio_print(const char* s) {
2595 // Try to make this function as atomic as possible.
2596 if (Arguments::vfprintf_hook() != NULL) {
2597 jio_fprintf(defaultStream::output_stream(), "%s", s);
2598 } else {
2599 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2600 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2601 }
2602 }
2603
2604 } // Extern C
2605
2606 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2607
2608 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2609 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2610 // OSThread objects. The exception to this rule is when the target object is the thread
2611 // doing the operation, in which case we know that the thread won't exit until the
2612 // operation is done (all exits being voluntary). There are a few cases where it is
2613 // rather silly to do operations on yourself, like resuming yourself or asking whether
2614 // you are alive. While these can still happen, they are not subject to deadlocks if
2615 // the lock is held while the operation occurs (this is not the case for suspend, for
2616 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2617 // implementation is local to this file, we always lock Threads_lock for that one.
2618
2619 static void thread_entry(JavaThread* thread, TRAPS) {
2620 HandleMark hm(THREAD);
2621 Handle obj(THREAD, thread->threadObj());
2622 JavaValue result(T_VOID);
2623 JavaCalls::call_virtual(&result,
2624 obj,
2625 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2626 vmSymbols::run_method_name(),
2627 vmSymbols::void_method_signature(),
2628 THREAD);
2629 }
2630
2631
2632 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2633 JVMWrapper("JVM_StartThread");
2634 JavaThread *native_thread = NULL;
2635
2636 // We cannot hold the Threads_lock when we throw an exception,
2637 // due to rank ordering issues. Example: we might need to grab the
2638 // Heap_lock while we construct the exception.
2639 bool throw_illegal_thread_state = false;
2640
2641 // We must release the Threads_lock before we can post a jvmti event
2642 // in Thread::start.
2643 {
2644 // Ensure that the C++ Thread and OSThread structures aren't freed before
2645 // we operate.
2646 MutexLocker mu(Threads_lock);
2647
2648 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2649 // re-starting an already started thread, so we should usually find
2650 // that the JavaThread is null. However for a JNI attached thread
2651 // there is a small window between the Thread object being created
2652 // (with its JavaThread set) and the update to its threadStatus, so we
2653 // have to check for this
2654 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2655 throw_illegal_thread_state = true;
2656 } else {
2657 // We could also check the stillborn flag to see if this thread was already stopped, but
2658 // for historical reasons we let the thread detect that itself when it starts running
2659
2660 jlong size =
2661 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2662 // Allocate the C++ Thread structure and create the native thread. The
2663 // stack size retrieved from java is signed, but the constructor takes
2664 // size_t (an unsigned type), so avoid passing negative values which would
2665 // result in really large stacks.
2666 size_t sz = size > 0 ? (size_t) size : 0;
2667 native_thread = new JavaThread(&thread_entry, sz);
2668
2669 // At this point it may be possible that no osthread was created for the
2670 // JavaThread due to lack of memory. Check for this situation and throw
2671 // an exception if necessary. Eventually we may want to change this so
2672 // that we only grab the lock if the thread was created successfully -
2673 // then we can also do this check and throw the exception in the
2674 // JavaThread constructor.
2675 if (native_thread->osthread() != NULL) {
2676 // Note: the current thread is not being used within "prepare".
2677 native_thread->prepare(jthread);
2678 }
2679 }
2680 }
2681
2682 if (throw_illegal_thread_state) {
2683 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2684 }
2685
2686 assert(native_thread != NULL, "Starting null thread?");
2687
2688 if (native_thread->osthread() == NULL) {
2689 // No one should hold a reference to the 'native_thread'.
2690 delete native_thread;
2691 if (JvmtiExport::should_post_resource_exhausted()) {
2692 JvmtiExport::post_resource_exhausted(
2693 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2694 "unable to create new native thread");
2695 }
2696 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2697 "unable to create new native thread");
2698 }
2699
2700 Thread::start(native_thread);
2701
2702 JVM_END
2703
2704 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2705 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2706 // but is thought to be reliable and simple. In the case, where the receiver is the
2707 // same thread as the sender, no safepoint is needed.
2708 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2709 JVMWrapper("JVM_StopThread");
2710
2711 oop java_throwable = JNIHandles::resolve(throwable);
2712 if (java_throwable == NULL) {
2713 THROW(vmSymbols::java_lang_NullPointerException());
2714 }
2715 oop java_thread = JNIHandles::resolve_non_null(jthread);
2716 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2717 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2718 // First check if thread is alive
2719 if (receiver != NULL) {
2720 // Check if exception is getting thrown at self (use oop equality, since the
2721 // target object might exit)
2722 if (java_thread == thread->threadObj()) {
2723 THROW_OOP(java_throwable);
2724 } else {
2725 // Enques a VM_Operation to stop all threads and then deliver the exception...
2726 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2727 }
2728 }
2729 else {
2730 // Either:
2731 // - target thread has not been started before being stopped, or
2732 // - target thread already terminated
2733 // We could read the threadStatus to determine which case it is
2734 // but that is overkill as it doesn't matter. We must set the
2735 // stillborn flag for the first case, and if the thread has already
2736 // exited setting this flag has no affect
2737 java_lang_Thread::set_stillborn(java_thread);
2738 }
2739 JVM_END
2740
2741
2742 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2743 JVMWrapper("JVM_IsThreadAlive");
2744
2745 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2746 return java_lang_Thread::is_alive(thread_oop);
2747 JVM_END
2748
2749
2750 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2751 JVMWrapper("JVM_SuspendThread");
2752 oop java_thread = JNIHandles::resolve_non_null(jthread);
2753 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2754
2755 if (receiver != NULL) {
2756 // thread has run and has not exited (still on threads list)
2757
2758 {
2759 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2760 if (receiver->is_external_suspend()) {
2761 // Don't allow nested external suspend requests. We can't return
2762 // an error from this interface so just ignore the problem.
2763 return;
2764 }
2765 if (receiver->is_exiting()) { // thread is in the process of exiting
2766 return;
2767 }
2768 receiver->set_external_suspend();
2769 }
2770
2771 // java_suspend() will catch threads in the process of exiting
2772 // and will ignore them.
2773 receiver->java_suspend();
2774
2775 // It would be nice to have the following assertion in all the
2776 // time, but it is possible for a racing resume request to have
2777 // resumed this thread right after we suspended it. Temporarily
2778 // enable this assertion if you are chasing a different kind of
2779 // bug.
2780 //
2781 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2782 // receiver->is_being_ext_suspended(), "thread is not suspended");
2783 }
2784 JVM_END
2785
2786
2787 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2788 JVMWrapper("JVM_ResumeThread");
2789 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2790 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2791 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2792 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2793 // looks at it.
2794 MutexLocker ml(Threads_lock);
2795 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2796 if (thr != NULL) {
2797 // the thread has run and is not in the process of exiting
2798 thr->java_resume();
2799 }
2800 JVM_END
2801
2802
2803 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2804 JVMWrapper("JVM_SetThreadPriority");
2805 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2806 MutexLocker ml(Threads_lock);
2807 oop java_thread = JNIHandles::resolve_non_null(jthread);
2808 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2809 JavaThread* thr = java_lang_Thread::thread(java_thread);
2810 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2811 Thread::set_priority(thr, (ThreadPriority)prio);
2812 }
2813 JVM_END
2814
2815
2816 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2817 JVMWrapper("JVM_Yield");
2818 if (os::dont_yield()) return;
2819 HS_DTRACE_PROBE0(hotspot, thread__yield);
2820 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2821 // Critical for similar threading behaviour
2822 if (ConvertYieldToSleep) {
2823 os::sleep(thread, MinSleepInterval, false);
2824 } else {
2825 os::yield();
2826 }
2827 JVM_END
2828
2829
2830 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2831 JVMWrapper("JVM_Sleep");
2832
2833 if (millis < 0) {
2834 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2835 }
2836
2837 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2838 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2839 }
2840
2841 // Save current thread state and restore it at the end of this block.
2842 // And set new thread state to SLEEPING.
2843 JavaThreadSleepState jtss(thread);
2844
2845 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2846
2847 if (millis == 0) {
2848 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2849 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2850 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2851 // for SOLARIS
2852 if (ConvertSleepToYield) {
2853 os::yield();
2854 } else {
2855 ThreadState old_state = thread->osthread()->get_state();
2856 thread->osthread()->set_state(SLEEPING);
2857 os::sleep(thread, MinSleepInterval, false);
2858 thread->osthread()->set_state(old_state);
2859 }
2860 } else {
2861 ThreadState old_state = thread->osthread()->get_state();
2862 thread->osthread()->set_state(SLEEPING);
2863 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2864 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2865 // us while we were sleeping. We do not overwrite those.
2866 if (!HAS_PENDING_EXCEPTION) {
2867 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2868 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2869 // to properly restore the thread state. That's likely wrong.
2870 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2871 }
2872 }
2873 thread->osthread()->set_state(old_state);
2874 }
2875 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2876 JVM_END
2877
2878 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2879 JVMWrapper("JVM_CurrentThread");
2880 oop jthread = thread->threadObj();
2881 assert (thread != NULL, "no current thread!");
2882 return JNIHandles::make_local(env, jthread);
2883 JVM_END
2884
2885
2886 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2887 JVMWrapper("JVM_CountStackFrames");
2888
2889 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2890 oop java_thread = JNIHandles::resolve_non_null(jthread);
2891 bool throw_illegal_thread_state = false;
2892 int count = 0;
2893
2894 {
2895 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2896 // We need to re-resolve the java_thread, since a GC might have happened during the
2897 // acquire of the lock
2898 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2899
2900 if (thr == NULL) {
2901 // do nothing
2902 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2903 // Check whether this java thread has been suspended already. If not, throws
2904 // IllegalThreadStateException. We defer to throw that exception until
2905 // Threads_lock is released since loading exception class has to leave VM.
2906 // The correct way to test a thread is actually suspended is
2907 // wait_for_ext_suspend_completion(), but we can't call that while holding
2908 // the Threads_lock. The above tests are sufficient for our purposes
2909 // provided the walkability of the stack is stable - which it isn't
2910 // 100% but close enough for most practical purposes.
2911 throw_illegal_thread_state = true;
2912 } else {
2913 // Count all java activation, i.e., number of vframes
2914 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2915 // Native frames are not counted
2916 if (!vfst.method()->is_native()) count++;
2917 }
2918 }
2919 }
2920
2921 if (throw_illegal_thread_state) {
2922 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2923 "this thread is not suspended");
2924 }
2925 return count;
2926 JVM_END
2927
2928 // Consider: A better way to implement JVM_Interrupt() is to acquire
2929 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2930 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2931 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2932 // outside the critical section. Threads_lock is hot so we want to minimize
2933 // the hold-time. A cleaner interface would be to decompose interrupt into
2934 // two steps. The 1st phase, performed under Threads_lock, would return
2935 // a closure that'd be invoked after Threads_lock was dropped.
2936 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2937 // admit spurious wakeups.
2938
2939 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2940 JVMWrapper("JVM_Interrupt");
2941
2942 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2943 oop java_thread = JNIHandles::resolve_non_null(jthread);
2944 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2945 // We need to re-resolve the java_thread, since a GC might have happened during the
2946 // acquire of the lock
2947 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2948 if (thr != NULL) {
2949 Thread::interrupt(thr);
2950 }
2951 JVM_END
2952
2953
2954 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2955 JVMWrapper("JVM_IsInterrupted");
2956
2957 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2958 oop java_thread = JNIHandles::resolve_non_null(jthread);
2959 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2960 // We need to re-resolve the java_thread, since a GC might have happened during the
2961 // acquire of the lock
2962 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2963 if (thr == NULL) {
2964 return JNI_FALSE;
2965 } else {
2966 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2967 }
2968 JVM_END
2969
2970
2971 // Return true iff the current thread has locked the object passed in
2972
2973 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2974 JVMWrapper("JVM_HoldsLock");
2975 assert(THREAD->is_Java_thread(), "sanity check");
2976 if (obj == NULL) {
2977 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2978 }
2979 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2980 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2981 JVM_END
2982
2983
2984 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2985 JVMWrapper("JVM_DumpAllStacks");
2986 VM_PrintThreads op;
2987 VMThread::execute(&op);
2988 if (JvmtiExport::should_post_data_dump()) {
2989 JvmtiExport::post_data_dump();
2990 }
2991 JVM_END
2992
2993
2994 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2995
2996 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2997 assert(jthread->is_Java_thread(), "must be a Java thread");
2998 if (jthread->privileged_stack_top() == NULL) return false;
2999 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3000 oop loader = jthread->privileged_stack_top()->class_loader();
3001 if (loader == NULL) return true;
3002 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3003 if (trusted) return true;
3004 }
3005 return false;
3006 }
3007
3008 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3009 JVMWrapper("JVM_CurrentLoadedClass");
3010 ResourceMark rm(THREAD);
3011
3012 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3013 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3014 bool trusted = is_trusted_frame(thread, &vfst);
3015 if (trusted) return NULL;
3016
3017 methodOop m = vfst.method();
3018 if (!m->is_native()) {
3019 klassOop holder = m->method_holder();
3020 oop loader = instanceKlass::cast(holder)->class_loader();
3021 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3022 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3023 }
3024 }
3025 }
3026 return NULL;
3027 JVM_END
3028
3029
3030 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3031 JVMWrapper("JVM_CurrentClassLoader");
3032 ResourceMark rm(THREAD);
3033
3034 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3035
3036 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3037 bool trusted = is_trusted_frame(thread, &vfst);
3038 if (trusted) return NULL;
3039
3040 methodOop m = vfst.method();
3041 if (!m->is_native()) {
3042 klassOop holder = m->method_holder();
3043 assert(holder->is_klass(), "just checking");
3044 oop loader = instanceKlass::cast(holder)->class_loader();
3045 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3046 return JNIHandles::make_local(env, loader);
3047 }
3048 }
3049 }
3050 return NULL;
3051 JVM_END
3052
3053
3054 // Utility object for collecting method holders walking down the stack
3055 class KlassLink: public ResourceObj {
3056 public:
3057 KlassHandle klass;
3058 KlassLink* next;
3059
3060 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3061 };
3062
3063
3064 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3065 JVMWrapper("JVM_GetClassContext");
3066 ResourceMark rm(THREAD);
3067 JvmtiVMObjectAllocEventCollector oam;
3068 // Collect linked list of (handles to) method holders
3069 KlassLink* first = NULL;
3070 KlassLink* last = NULL;
3071 int depth = 0;
3072
3073 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3074 // Native frames are not returned
3075 if (!vfst.method()->is_native()) {
3076 klassOop holder = vfst.method()->method_holder();
3077 assert(holder->is_klass(), "just checking");
3078 depth++;
3079 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3080 if (first == NULL) {
3081 first = last = l;
3082 } else {
3083 last->next = l;
3084 last = l;
3085 }
3086 }
3087 }
3088
3089 // Create result array of type [Ljava/lang/Class;
3090 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3091 // Fill in mirrors corresponding to method holders
3092 int index = 0;
3093 while (first != NULL) {
3094 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3095 first = first->next;
3096 }
3097 assert(index == depth, "just checking");
3098
3099 return (jobjectArray) JNIHandles::make_local(env, result);
3100 JVM_END
3101
3102
3103 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3104 JVMWrapper("JVM_ClassDepth");
3105 ResourceMark rm(THREAD);
3106 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3107 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3108
3109 const char* str = java_lang_String::as_utf8_string(class_name_str());
3110 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3111 if (class_name_sym == NULL) {
3112 return -1;
3113 }
3114
3115 int depth = 0;
3116
3117 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3118 if (!vfst.method()->is_native()) {
3119 klassOop holder = vfst.method()->method_holder();
3120 assert(holder->is_klass(), "just checking");
3121 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3122 return depth;
3123 }
3124 depth++;
3125 }
3126 }
3127 return -1;
3128 JVM_END
3129
3130
3131 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3132 JVMWrapper("JVM_ClassLoaderDepth");
3133 ResourceMark rm(THREAD);
3134 int depth = 0;
3135 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3136 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3137 bool trusted = is_trusted_frame(thread, &vfst);
3138 if (trusted) return -1;
3139
3140 methodOop m = vfst.method();
3141 if (!m->is_native()) {
3142 klassOop holder = m->method_holder();
3143 assert(holder->is_klass(), "just checking");
3144 oop loader = instanceKlass::cast(holder)->class_loader();
3145 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3146 return depth;
3147 }
3148 depth++;
3149 }
3150 }
3151 return -1;
3152 JVM_END
3153
3154
3155 // java.lang.Package ////////////////////////////////////////////////////////////////
3156
3157
3158 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3159 JVMWrapper("JVM_GetSystemPackage");
3160 ResourceMark rm(THREAD);
3161 JvmtiVMObjectAllocEventCollector oam;
3162 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3163 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3164 return (jstring) JNIHandles::make_local(result);
3165 JVM_END
3166
3167
3168 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3169 JVMWrapper("JVM_GetSystemPackages");
3170 JvmtiVMObjectAllocEventCollector oam;
3171 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3172 return (jobjectArray) JNIHandles::make_local(result);
3173 JVM_END
3174
3175
3176 // ObjectInputStream ///////////////////////////////////////////////////////////////
3177
3178 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3179 if (current_class == NULL) {
3180 return true;
3181 }
3182 if ((current_class == field_class) || access.is_public()) {
3183 return true;
3184 }
3185
3186 if (access.is_protected()) {
3187 // See if current_class is a subclass of field_class
3188 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3189 return true;
3190 }
3191 }
3192
3193 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3194 }
3195
3196
3197 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3198 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3199 JVMWrapper("JVM_AllocateNewObject");
3200 JvmtiVMObjectAllocEventCollector oam;
3201 // Receiver is not used
3202 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3203 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3204
3205 // Cannot instantiate primitive types
3206 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3207 ResourceMark rm(THREAD);
3208 THROW_0(vmSymbols::java_lang_InvalidClassException());
3209 }
3210
3211 // Arrays not allowed here, must use JVM_AllocateNewArray
3212 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3213 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3214 ResourceMark rm(THREAD);
3215 THROW_0(vmSymbols::java_lang_InvalidClassException());
3216 }
3217
3218 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3219 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3220
3221 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3222
3223 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3224 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3225
3226 // Make sure klass is initialized, since we are about to instantiate one of them.
3227 curr_klass->initialize(CHECK_NULL);
3228
3229 methodHandle m (THREAD,
3230 init_klass->find_method(vmSymbols::object_initializer_name(),
3231 vmSymbols::void_method_signature()));
3232 if (m.is_null()) {
3233 ResourceMark rm(THREAD);
3234 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3235 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3236 vmSymbols::object_initializer_name(),
3237 vmSymbols::void_method_signature()));
3238 }
3239
3240 if (curr_klass == init_klass && !m->is_public()) {
3241 // Calling the constructor for class 'curr_klass'.
3242 // Only allow calls to a public no-arg constructor.
3243 // This path corresponds to creating an Externalizable object.
3244 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3245 }
3246
3247 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3248 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3249 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3250 }
3251
3252 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3253 // Call constructor m. This might call a constructor higher up in the hierachy
3254 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3255
3256 return JNIHandles::make_local(obj());
3257 JVM_END
3258
3259
3260 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3261 JVMWrapper("JVM_AllocateNewArray");
3262 JvmtiVMObjectAllocEventCollector oam;
3263 oop mirror = JNIHandles::resolve_non_null(currClass);
3264
3265 if (java_lang_Class::is_primitive(mirror)) {
3266 THROW_0(vmSymbols::java_lang_InvalidClassException());
3267 }
3268 klassOop k = java_lang_Class::as_klassOop(mirror);
3269 oop result;
3270
3271 if (k->klass_part()->oop_is_typeArray()) {
3272 // typeArray
3273 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3274 } else if (k->klass_part()->oop_is_objArray()) {
3275 // objArray
3276 objArrayKlassHandle oak(THREAD, k);
3277 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3278 result = oak->allocate(length, CHECK_NULL);
3279 } else {
3280 THROW_0(vmSymbols::java_lang_InvalidClassException());
3281 }
3282 return JNIHandles::make_local(env, result);
3283 JVM_END
3284
3285
3286 // Return the first non-null class loader up the execution stack, or null
3287 // if only code from the null class loader is on the stack.
3288
3289 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3290 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3291 // UseNewReflection
3292 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3293 klassOop holder = vfst.method()->method_holder();
3294 oop loader = instanceKlass::cast(holder)->class_loader();
3295 if (loader != NULL) {
3296 return JNIHandles::make_local(env, loader);
3297 }
3298 }
3299 return NULL;
3300 JVM_END
3301
3302
3303 // Load a class relative to the most recent class on the stack with a non-null
3304 // classloader.
3305 // This function has been deprecated and should not be considered part of the
3306 // specified JVM interface.
3307
3308 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3309 jclass currClass, jstring currClassName))
3310 JVMWrapper("JVM_LoadClass0");
3311 // Receiver is not used
3312 ResourceMark rm(THREAD);
3313
3314 // Class name argument is not guaranteed to be in internal format
3315 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3316 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3317
3318 const char* str = java_lang_String::as_utf8_string(string());
3319
3320 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3321 // It's impossible to create this class; the name cannot fit
3322 // into the constant pool.
3323 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3324 }
3325
3326 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3327 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3328 // Find the most recent class on the stack with a non-null classloader
3329 oop loader = NULL;
3330 oop protection_domain = NULL;
3331 if (curr_klass.is_null()) {
3332 for (vframeStream vfst(thread);
3333 !vfst.at_end() && loader == NULL;
3334 vfst.next()) {
3335 if (!vfst.method()->is_native()) {
3336 klassOop holder = vfst.method()->method_holder();
3337 loader = instanceKlass::cast(holder)->class_loader();
3338 protection_domain = instanceKlass::cast(holder)->protection_domain();
3339 }
3340 }
3341 } else {
3342 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3343 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3344 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3345 }
3346 Handle h_loader(THREAD, loader);
3347 Handle h_prot (THREAD, protection_domain);
3348 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3349 false, thread);
3350 if (TraceClassResolution && result != NULL) {
3351 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3352 }
3353 return result;
3354 JVM_END
3355
3356
3357 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3358
3359
3360 // resolve array handle and check arguments
3361 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3362 if (arr == NULL) {
3363 THROW_0(vmSymbols::java_lang_NullPointerException());
3364 }
3365 oop a = JNIHandles::resolve_non_null(arr);
3366 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3367 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3368 }
3369 return arrayOop(a);
3370 }
3371
3372
3373 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3374 JVMWrapper("JVM_GetArrayLength");
3375 arrayOop a = check_array(env, arr, false, CHECK_0);
3376 return a->length();
3377 JVM_END
3378
3379
3380 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3381 JVMWrapper("JVM_Array_Get");
3382 JvmtiVMObjectAllocEventCollector oam;
3383 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3384 jvalue value;
3385 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3386 oop box = Reflection::box(&value, type, CHECK_NULL);
3387 return JNIHandles::make_local(env, box);
3388 JVM_END
3389
3390
3391 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3392 JVMWrapper("JVM_GetPrimitiveArrayElement");
3393 jvalue value;
3394 value.i = 0; // to initialize value before getting used in CHECK
3395 arrayOop a = check_array(env, arr, true, CHECK_(value));
3396 assert(a->is_typeArray(), "just checking");
3397 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3398 BasicType wide_type = (BasicType) wCode;
3399 if (type != wide_type) {
3400 Reflection::widen(&value, type, wide_type, CHECK_(value));
3401 }
3402 return value;
3403 JVM_END
3404
3405
3406 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3407 JVMWrapper("JVM_SetArrayElement");
3408 arrayOop a = check_array(env, arr, false, CHECK);
3409 oop box = JNIHandles::resolve(val);
3410 jvalue value;
3411 value.i = 0; // to initialize value before getting used in CHECK
3412 BasicType value_type;
3413 if (a->is_objArray()) {
3414 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3415 value_type = Reflection::unbox_for_regular_object(box, &value);
3416 } else {
3417 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3418 }
3419 Reflection::array_set(&value, a, index, value_type, CHECK);
3420 JVM_END
3421
3422
3423 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3424 JVMWrapper("JVM_SetPrimitiveArrayElement");
3425 arrayOop a = check_array(env, arr, true, CHECK);
3426 assert(a->is_typeArray(), "just checking");
3427 BasicType value_type = (BasicType) vCode;
3428 Reflection::array_set(&v, a, index, value_type, CHECK);
3429 JVM_END
3430
3431
3432 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3433 JVMWrapper("JVM_NewArray");
3434 JvmtiVMObjectAllocEventCollector oam;
3435 oop element_mirror = JNIHandles::resolve(eltClass);
3436 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3437 return JNIHandles::make_local(env, result);
3438 JVM_END
3439
3440
3441 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3442 JVMWrapper("JVM_NewMultiArray");
3443 JvmtiVMObjectAllocEventCollector oam;
3444 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3445 oop element_mirror = JNIHandles::resolve(eltClass);
3446 assert(dim_array->is_typeArray(), "just checking");
3447 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3448 return JNIHandles::make_local(env, result);
3449 JVM_END
3450
3451
3452 // Networking library support ////////////////////////////////////////////////////////////////////
3453
3454 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3455 JVMWrapper("JVM_InitializeSocketLibrary");
3456 return 0;
3457 JVM_END
3458
3459
3460 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3461 JVMWrapper("JVM_Socket");
3462 return os::socket(domain, type, protocol);
3463 JVM_END
3464
3465
3466 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3467 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3468 //%note jvm_r6
3469 return os::socket_close(fd);
3470 JVM_END
3471
3472
3473 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3474 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3475 //%note jvm_r6
3476 return os::socket_shutdown(fd, howto);
3477 JVM_END
3478
3479
3480 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3481 JVMWrapper2("JVM_Recv (0x%x)", fd);
3482 //%note jvm_r6
3483 return os::recv(fd, buf, nBytes, flags);
3484 JVM_END
3485
3486
3487 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3488 JVMWrapper2("JVM_Send (0x%x)", fd);
3489 //%note jvm_r6
3490 return os::send(fd, buf, nBytes, flags);
3491 JVM_END
3492
3493
3494 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3495 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3496 //%note jvm_r6
3497 return os::timeout(fd, timeout);
3498 JVM_END
3499
3500
3501 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3502 JVMWrapper2("JVM_Listen (0x%x)", fd);
3503 //%note jvm_r6
3504 return os::listen(fd, count);
3505 JVM_END
3506
3507
3508 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3509 JVMWrapper2("JVM_Connect (0x%x)", fd);
3510 //%note jvm_r6
3511 return os::connect(fd, him, len);
3512 JVM_END
3513
3514
3515 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3516 JVMWrapper2("JVM_Bind (0x%x)", fd);
3517 //%note jvm_r6
3518 return os::bind(fd, him, len);
3519 JVM_END
3520
3521
3522 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3523 JVMWrapper2("JVM_Accept (0x%x)", fd);
3524 //%note jvm_r6
3525 return os::accept(fd, him, (int *)len);
3526 JVM_END
3527
3528
3529 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3530 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3531 //%note jvm_r6
3532 return os::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3533 JVM_END
3534
3535
3536 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3537 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3538 //%note jvm_r6
3539 return os::get_sock_name(fd, him, len);
3540 JVM_END
3541
3542
3543 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3544 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3545 //%note jvm_r6
3546 return os::sendto(fd, buf, len, flags, to, tolen);
3547 JVM_END
3548
3549
3550 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3551 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3552 //%note jvm_r6
3553 return os::socket_available(fd, pbytes);
3554 JVM_END
3555
3556
3557 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3558 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3559 //%note jvm_r6
3560 return os::get_sock_opt(fd, level, optname, optval, optlen);
3561 JVM_END
3562
3563
3564 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3565 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3566 //%note jvm_r6
3567 return os::set_sock_opt(fd, level, optname, optval, optlen);
3568 JVM_END
3569
3570 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3571 JVMWrapper("JVM_GetHostName");
3572 return os::get_host_name(name, namelen);
3573 JVM_END
3574
3575 // Library support ///////////////////////////////////////////////////////////////////////////
3576
3577 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3578 //%note jvm_ct
3579 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3580 char ebuf[1024];
3581 void *load_result;
3582 {
3583 ThreadToNativeFromVM ttnfvm(thread);
3584 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3585 }
3586 if (load_result == NULL) {
3587 char msg[1024];
3588 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3589 // Since 'ebuf' may contain a string encoded using
3590 // platform encoding scheme, we need to pass
3591 // Exceptions::unsafe_to_utf8 to the new_exception method
3592 // as the last argument. See bug 6367357.
3593 Handle h_exception =
3594 Exceptions::new_exception(thread,
3595 vmSymbols::java_lang_UnsatisfiedLinkError(),
3596 msg, Exceptions::unsafe_to_utf8);
3597
3598 THROW_HANDLE_0(h_exception);
3599 }
3600 return load_result;
3601 JVM_END
3602
3603
3604 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3605 JVMWrapper("JVM_UnloadLibrary");
3606 os::dll_unload(handle);
3607 JVM_END
3608
3609
3610 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3611 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3612 return os::dll_lookup(handle, name);
3613 JVM_END
3614
3615 // Floating point support ////////////////////////////////////////////////////////////////////
3616
3617 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3618 JVMWrapper("JVM_IsNaN");
3619 return g_isnan(a);
3620 JVM_END
3621
3622
3623
3624 // JNI version ///////////////////////////////////////////////////////////////////////////////
3625
3626 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3627 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3628 return Threads::is_supported_jni_version_including_1_1(version);
3629 JVM_END
3630
3631
3632 // String support ///////////////////////////////////////////////////////////////////////////
3633
3634 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3635 JVMWrapper("JVM_InternString");
3636 JvmtiVMObjectAllocEventCollector oam;
3637 if (str == NULL) return NULL;
3638 oop string = JNIHandles::resolve_non_null(str);
3639 oop result = StringTable::intern(string, CHECK_NULL);
3640 return (jstring) JNIHandles::make_local(env, result);
3641 JVM_END
3642
3643
3644 // Raw monitor support //////////////////////////////////////////////////////////////////////
3645
3646 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3647 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3648 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3649 // that only works with java threads.
3650
3651
3652 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3653 VM_Exit::block_if_vm_exited();
3654 JVMWrapper("JVM_RawMonitorCreate");
3655 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3656 }
3657
3658
3659 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3660 VM_Exit::block_if_vm_exited();
3661 JVMWrapper("JVM_RawMonitorDestroy");
3662 delete ((Mutex*) mon);
3663 }
3664
3665
3666 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3667 VM_Exit::block_if_vm_exited();
3668 JVMWrapper("JVM_RawMonitorEnter");
3669 ((Mutex*) mon)->jvm_raw_lock();
3670 return 0;
3671 }
3672
3673
3674 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3675 VM_Exit::block_if_vm_exited();
3676 JVMWrapper("JVM_RawMonitorExit");
3677 ((Mutex*) mon)->jvm_raw_unlock();
3678 }
3679
3680
3681 // Support for Serialization
3682
3683 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3684 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3685 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3686 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3687
3688 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3689 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3690 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3691 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3692
3693
3694 void initialize_converter_functions() {
3695 if (JDK_Version::is_gte_jdk14x_version()) {
3696 // These functions only exist for compatibility with 1.3.1 and earlier
3697 return;
3698 }
3699
3700 // called from universe_post_init()
3701 assert(
3702 int_bits_to_float_fn == NULL &&
3703 long_bits_to_double_fn == NULL &&
3704 float_to_int_bits_fn == NULL &&
3705 double_to_long_bits_fn == NULL ,
3706 "initialization done twice"
3707 );
3708 // initialize
3709 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3710 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3711 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3712 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3713 // verify
3714 assert(
3715 int_bits_to_float_fn != NULL &&
3716 long_bits_to_double_fn != NULL &&
3717 float_to_int_bits_fn != NULL &&
3718 double_to_long_bits_fn != NULL ,
3719 "initialization failed"
3720 );
3721 }
3722
3723
3724 // Serialization
3725 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3726 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3727 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3728
3729 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3730 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3731 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3732 oop o = JNIHandles::resolve(obj);
3733
3734 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3735 THROW(vmSymbols::java_lang_NullPointerException());
3736 }
3737
3738 jsize nfids = fids->length();
3739 if (nfids == 0) return;
3740
3741 if (tcodes->length() < nfids) {
3742 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3743 }
3744
3745 jsize off = 0;
3746 /* loop through fields, setting values */
3747 for (jsize i = 0; i < nfids; i++) {
3748 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3749 int field_offset;
3750 if (fid != NULL) {
3751 // NULL is a legal value for fid, but retrieving the field offset
3752 // trigger assertion in that case
3753 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3754 }
3755
3756 switch (tcodes->char_at(i)) {
3757 case 'Z':
3758 if (fid != NULL) {
3759 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3760 o->bool_field_put(field_offset, val);
3761 }
3762 off++;
3763 break;
3764
3765 case 'B':
3766 if (fid != NULL) {
3767 o->byte_field_put(field_offset, dbuf->byte_at(off));
3768 }
3769 off++;
3770 break;
3771
3772 case 'C':
3773 if (fid != NULL) {
3774 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3775 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3776 o->char_field_put(field_offset, val);
3777 }
3778 off += 2;
3779 break;
3780
3781 case 'S':
3782 if (fid != NULL) {
3783 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3784 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3785 o->short_field_put(field_offset, val);
3786 }
3787 off += 2;
3788 break;
3789
3790 case 'I':
3791 if (fid != NULL) {
3792 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3793 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3794 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3795 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3796 o->int_field_put(field_offset, ival);
3797 }
3798 off += 4;
3799 break;
3800
3801 case 'F':
3802 if (fid != NULL) {
3803 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3804 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3805 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3806 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3807 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3808 o->float_field_put(field_offset, fval);
3809 }
3810 off += 4;
3811 break;
3812
3813 case 'J':
3814 if (fid != NULL) {
3815 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3816 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3817 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3818 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3819 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3820 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3821 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3822 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3823 o->long_field_put(field_offset, lval);
3824 }
3825 off += 8;
3826 break;
3827
3828 case 'D':
3829 if (fid != NULL) {
3830 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3831 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3832 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3833 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3834 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3835 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3836 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3837 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3838 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3839 o->double_field_put(field_offset, dval);
3840 }
3841 off += 8;
3842 break;
3843
3844 default:
3845 // Illegal typecode
3846 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3847 }
3848 }
3849 JVM_END
3850
3851
3852 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3853 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3854 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3855
3856 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3857 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3858 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3859 oop o = JNIHandles::resolve(obj);
3860
3861 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3862 THROW(vmSymbols::java_lang_NullPointerException());
3863 }
3864
3865 jsize nfids = fids->length();
3866 if (nfids == 0) return;
3867
3868 if (tcodes->length() < nfids) {
3869 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3870 }
3871
3872 /* loop through fields, fetching values */
3873 jsize off = 0;
3874 for (jsize i = 0; i < nfids; i++) {
3875 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3876 if (fid == NULL) {
3877 THROW(vmSymbols::java_lang_NullPointerException());
3878 }
3879 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3880
3881 switch (tcodes->char_at(i)) {
3882 case 'Z':
3883 {
3884 jboolean val = o->bool_field(field_offset);
3885 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3886 }
3887 break;
3888
3889 case 'B':
3890 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3891 break;
3892
3893 case 'C':
3894 {
3895 jchar val = o->char_field(field_offset);
3896 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3897 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3898 }
3899 break;
3900
3901 case 'S':
3902 {
3903 jshort val = o->short_field(field_offset);
3904 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3905 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3906 }
3907 break;
3908
3909 case 'I':
3910 {
3911 jint val = o->int_field(field_offset);
3912 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3913 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3914 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3915 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3916 }
3917 break;
3918
3919 case 'F':
3920 {
3921 jfloat fval = o->float_field(field_offset);
3922 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3923 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3924 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3925 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3926 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3927 }
3928 break;
3929
3930 case 'J':
3931 {
3932 jlong val = o->long_field(field_offset);
3933 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3934 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3935 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3936 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
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 'D':
3945 {
3946 jdouble dval = o->double_field(field_offset);
3947 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3948 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3949 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3950 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3951 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3952 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3953 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3954 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3955 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3956 }
3957 break;
3958
3959 default:
3960 // Illegal typecode
3961 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3962 }
3963 }
3964 JVM_END
3965
3966
3967 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3968
3969 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3970 // Security Note:
3971 // The Java level wrapper will perform the necessary security check allowing
3972 // us to pass the NULL as the initiating class loader.
3973 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3974
3975 KlassHandle klass_handle(THREAD, klass);
3976 // Check if we should initialize the class
3977 if (init && klass_handle->oop_is_instance()) {
3978 klass_handle->initialize(CHECK_NULL);
3979 }
3980 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3981 }
3982
3983
3984 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3985
3986 #ifndef PRODUCT
3987
3988 extern "C" {
3989 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3990 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3991 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3992 }
3993
3994 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3995 JVMWrapper("JVM_AccessBoolVMFlag");
3996 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3997 JVM_END
3998
3999 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4000 JVMWrapper("JVM_AccessVMIntFlag");
4001 intx v;
4002 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4003 *value = (jint)v;
4004 return result;
4005 JVM_END
4006
4007
4008 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4009 JVMWrapper("JVM_VMBreakPoint");
4010 oop the_obj = JNIHandles::resolve(obj);
4011 BREAKPOINT;
4012 JVM_END
4013
4014
4015 #endif
4016
4017
4018 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4019
4020 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4021 JVMWrapper("JVM_InvokeMethod");
4022 Handle method_handle;
4023 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4024 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4025 Handle receiver(THREAD, JNIHandles::resolve(obj));
4026 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4027 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4028 jobject res = JNIHandles::make_local(env, result);
4029 if (JvmtiExport::should_post_vm_object_alloc()) {
4030 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4031 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4032 if (java_lang_Class::is_primitive(ret_type)) {
4033 // Only for primitive type vm allocates memory for java object.
4034 // See box() method.
4035 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4036 }
4037 }
4038 return res;
4039 } else {
4040 THROW_0(vmSymbols::java_lang_StackOverflowError());
4041 }
4042 JVM_END
4043
4044
4045 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4046 JVMWrapper("JVM_NewInstanceFromConstructor");
4047 oop constructor_mirror = JNIHandles::resolve(c);
4048 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4049 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4050 jobject res = JNIHandles::make_local(env, result);
4051 if (JvmtiExport::should_post_vm_object_alloc()) {
4052 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4053 }
4054 return res;
4055 JVM_END
4056
4057 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4058
4059 JVM_LEAF(jboolean, JVM_SupportsCX8())
4060 JVMWrapper("JVM_SupportsCX8");
4061 return VM_Version::supports_cx8();
4062 JVM_END
4063
4064
4065 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4066 JVMWrapper("JVM_CX8Field");
4067 jlong res;
4068 oop o = JNIHandles::resolve(obj);
4069 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4070 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4071
4072 assert(VM_Version::supports_cx8(), "cx8 not supported");
4073 res = Atomic::cmpxchg(newVal, addr, oldVal);
4074
4075 return res == oldVal;
4076 JVM_END
4077
4078 // DTrace ///////////////////////////////////////////////////////////////////
4079
4080 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4081 JVMWrapper("JVM_DTraceGetVersion");
4082 return (jint)JVM_TRACING_DTRACE_VERSION;
4083 JVM_END
4084
4085 JVM_ENTRY(jlong,JVM_DTraceActivate(
4086 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4087 JVM_DTraceProvider* providers))
4088 JVMWrapper("JVM_DTraceActivate");
4089 return DTraceJSDT::activate(
4090 version, module_name, providers_count, providers, CHECK_0);
4091 JVM_END
4092
4093 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4094 JVMWrapper("JVM_DTraceIsProbeEnabled");
4095 return DTraceJSDT::is_probe_enabled(method);
4096 JVM_END
4097
4098 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4099 JVMWrapper("JVM_DTraceDispose");
4100 DTraceJSDT::dispose(handle);
4101 JVM_END
4102
4103 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4104 JVMWrapper("JVM_DTraceIsSupported");
4105 return DTraceJSDT::is_supported();
4106 JVM_END
4107
4108 // Returns an array of all live Thread objects (VM internal JavaThreads,
4109 // jvmti agent threads, and JNI attaching threads are skipped)
4110 // See CR 6404306 regarding JNI attaching threads
4111 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4112 ResourceMark rm(THREAD);
4113 ThreadsListEnumerator tle(THREAD, false, false);
4114 JvmtiVMObjectAllocEventCollector oam;
4115
4116 int num_threads = tle.num_threads();
4117 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4118 objArrayHandle threads_ah(THREAD, r);
4119
4120 for (int i = 0; i < num_threads; i++) {
4121 Handle h = tle.get_threadObj(i);
4122 threads_ah->obj_at_put(i, h());
4123 }
4124
4125 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4126 JVM_END
4127
4128
4129 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4130 // Return StackTraceElement[][], each element is the stack trace of a thread in
4131 // the corresponding entry in the given threads array
4132 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4133 JVMWrapper("JVM_DumpThreads");
4134 JvmtiVMObjectAllocEventCollector oam;
4135
4136 // Check if threads is null
4137 if (threads == NULL) {
4138 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4139 }
4140
4141 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4142 objArrayHandle ah(THREAD, a);
4143 int num_threads = ah->length();
4144 // check if threads is non-empty array
4145 if (num_threads == 0) {
4146 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4147 }
4148
4149 // check if threads is not an array of objects of Thread class
4150 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4151 if (k != SystemDictionary::Thread_klass()) {
4152 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4153 }
4154
4155 ResourceMark rm(THREAD);
4156
4157 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4158 for (int i = 0; i < num_threads; i++) {
4159 oop thread_obj = ah->obj_at(i);
4160 instanceHandle h(THREAD, (instanceOop) thread_obj);
4161 thread_handle_array->append(h);
4162 }
4163
4164 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4165 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4166
4167 JVM_END
4168
4169 // JVM monitoring and management support
4170 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4171 return Management::get_jmm_interface(version);
4172 JVM_END
4173
4174 // com.sun.tools.attach.VirtualMachine agent properties support
4175 //
4176 // Initialize the agent properties with the properties maintained in the VM
4177 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4178 JVMWrapper("JVM_InitAgentProperties");
4179 ResourceMark rm;
4180
4181 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4182
4183 PUTPROP(props, "sun.java.command", Arguments::java_command());
4184 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4185 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4186 return properties;
4187 JVM_END
4188
4189 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4190 {
4191 JVMWrapper("JVM_GetEnclosingMethodInfo");
4192 JvmtiVMObjectAllocEventCollector oam;
4193
4194 if (ofClass == NULL) {
4195 return NULL;
4196 }
4197 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4198 // Special handling for primitive objects
4199 if (java_lang_Class::is_primitive(mirror())) {
4200 return NULL;
4201 }
4202 klassOop k = java_lang_Class::as_klassOop(mirror());
4203 if (!Klass::cast(k)->oop_is_instance()) {
4204 return NULL;
4205 }
4206 instanceKlassHandle ik_h(THREAD, k);
4207 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4208 if (encl_method_class_idx == 0) {
4209 return NULL;
4210 }
4211 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4212 objArrayHandle dest(THREAD, dest_o);
4213 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4214 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4215 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4216 if (encl_method_method_idx != 0) {
4217 Symbol* sym = ik_h->constants()->symbol_at(
4218 extract_low_short_from_int(
4219 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4220 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4221 dest->obj_at_put(1, str());
4222 sym = ik_h->constants()->symbol_at(
4223 extract_high_short_from_int(
4224 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4225 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4226 dest->obj_at_put(2, str());
4227 }
4228 return (jobjectArray) JNIHandles::make_local(dest());
4229 }
4230 JVM_END
4231
4232 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4233 jint javaThreadState))
4234 {
4235 // If new thread states are added in future JDK and VM versions,
4236 // this should check if the JDK version is compatible with thread
4237 // states supported by the VM. Return NULL if not compatible.
4238 //
4239 // This function must map the VM java_lang_Thread::ThreadStatus
4240 // to the Java thread state that the JDK supports.
4241 //
4242
4243 typeArrayHandle values_h;
4244 switch (javaThreadState) {
4245 case JAVA_THREAD_STATE_NEW : {
4246 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4247 values_h = typeArrayHandle(THREAD, r);
4248 values_h->int_at_put(0, java_lang_Thread::NEW);
4249 break;
4250 }
4251 case JAVA_THREAD_STATE_RUNNABLE : {
4252 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4253 values_h = typeArrayHandle(THREAD, r);
4254 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4255 break;
4256 }
4257 case JAVA_THREAD_STATE_BLOCKED : {
4258 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4259 values_h = typeArrayHandle(THREAD, r);
4260 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4261 break;
4262 }
4263 case JAVA_THREAD_STATE_WAITING : {
4264 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4265 values_h = typeArrayHandle(THREAD, r);
4266 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4267 values_h->int_at_put(1, java_lang_Thread::PARKED);
4268 break;
4269 }
4270 case JAVA_THREAD_STATE_TIMED_WAITING : {
4271 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4272 values_h = typeArrayHandle(THREAD, r);
4273 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4274 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4275 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4276 break;
4277 }
4278 case JAVA_THREAD_STATE_TERMINATED : {
4279 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4280 values_h = typeArrayHandle(THREAD, r);
4281 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4282 break;
4283 }
4284 default:
4285 // Unknown state - probably incompatible JDK version
4286 return NULL;
4287 }
4288
4289 return (jintArray) JNIHandles::make_local(env, values_h());
4290 }
4291 JVM_END
4292
4293
4294 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4295 jint javaThreadState,
4296 jintArray values))
4297 {
4298 // If new thread states are added in future JDK and VM versions,
4299 // this should check if the JDK version is compatible with thread
4300 // states supported by the VM. Return NULL if not compatible.
4301 //
4302 // This function must map the VM java_lang_Thread::ThreadStatus
4303 // to the Java thread state that the JDK supports.
4304 //
4305
4306 ResourceMark rm;
4307
4308 // Check if threads is null
4309 if (values == NULL) {
4310 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4311 }
4312
4313 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4314 typeArrayHandle values_h(THREAD, v);
4315
4316 objArrayHandle names_h;
4317 switch (javaThreadState) {
4318 case JAVA_THREAD_STATE_NEW : {
4319 assert(values_h->length() == 1 &&
4320 values_h->int_at(0) == java_lang_Thread::NEW,
4321 "Invalid threadStatus value");
4322
4323 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4324 1, /* only 1 substate */
4325 CHECK_NULL);
4326 names_h = objArrayHandle(THREAD, r);
4327 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4328 names_h->obj_at_put(0, name());
4329 break;
4330 }
4331 case JAVA_THREAD_STATE_RUNNABLE : {
4332 assert(values_h->length() == 1 &&
4333 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4334 "Invalid threadStatus value");
4335
4336 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4337 1, /* only 1 substate */
4338 CHECK_NULL);
4339 names_h = objArrayHandle(THREAD, r);
4340 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4341 names_h->obj_at_put(0, name());
4342 break;
4343 }
4344 case JAVA_THREAD_STATE_BLOCKED : {
4345 assert(values_h->length() == 1 &&
4346 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4347 "Invalid threadStatus value");
4348
4349 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4350 1, /* only 1 substate */
4351 CHECK_NULL);
4352 names_h = objArrayHandle(THREAD, r);
4353 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4354 names_h->obj_at_put(0, name());
4355 break;
4356 }
4357 case JAVA_THREAD_STATE_WAITING : {
4358 assert(values_h->length() == 2 &&
4359 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4360 values_h->int_at(1) == java_lang_Thread::PARKED,
4361 "Invalid threadStatus value");
4362 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4363 2, /* number of substates */
4364 CHECK_NULL);
4365 names_h = objArrayHandle(THREAD, r);
4366 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4367 CHECK_NULL);
4368 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4369 CHECK_NULL);
4370 names_h->obj_at_put(0, name0());
4371 names_h->obj_at_put(1, name1());
4372 break;
4373 }
4374 case JAVA_THREAD_STATE_TIMED_WAITING : {
4375 assert(values_h->length() == 3 &&
4376 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4377 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4378 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4379 "Invalid threadStatus value");
4380 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4381 3, /* number of substates */
4382 CHECK_NULL);
4383 names_h = objArrayHandle(THREAD, r);
4384 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4385 CHECK_NULL);
4386 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4387 CHECK_NULL);
4388 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4389 CHECK_NULL);
4390 names_h->obj_at_put(0, name0());
4391 names_h->obj_at_put(1, name1());
4392 names_h->obj_at_put(2, name2());
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_TERMINATED : {
4396 assert(values_h->length() == 1 &&
4397 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4398 "Invalid threadStatus value");
4399 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4400 1, /* only 1 substate */
4401 CHECK_NULL);
4402 names_h = objArrayHandle(THREAD, r);
4403 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4404 names_h->obj_at_put(0, name());
4405 break;
4406 }
4407 default:
4408 // Unknown state - probably incompatible JDK version
4409 return NULL;
4410 }
4411 return (jobjectArray) JNIHandles::make_local(env, names_h());
4412 }
4413 JVM_END
4414
4415 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4416 {
4417 memset(info, 0, sizeof(info_size));
4418
4419 info->jvm_version = Abstract_VM_Version::jvm_version();
4420 info->update_version = 0; /* 0 in HotSpot Express VM */
4421 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4422
4423 // when we add a new capability in the jvm_version_info struct, we should also
4424 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4425 // counter defined in runtimeService.cpp.
4426 info->is_attachable = AttachListener::is_attach_supported();
4427 #ifdef KERNEL
4428 info->is_kernel_jvm = 1; // true;
4429 #else // KERNEL
4430 info->is_kernel_jvm = 0; // false;
4431 #endif // KERNEL
4432 }
4433 JVM_END