1 /*
2 * Copyright (c) 1997, 2012, 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 "oops/method.hpp"
39 #include "prims/jvm.h"
40 #include "prims/jvm_misc.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "prims/jvmtiThreadState.hpp"
43 #include "prims/nativeLookup.hpp"
44 #include "prims/privilegedStack.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/dtraceJSDT.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/init.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/os.hpp"
54 #include "runtime/perfData.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/vframe.hpp"
57 #include "runtime/vm_operations.hpp"
58 #include "services/attachListener.hpp"
59 #include "services/management.hpp"
60 #include "services/threadService.hpp"
61 #include "utilities/copy.hpp"
62 #include "utilities/defaultStream.hpp"
63 #include "utilities/dtrace.hpp"
64 #include "utilities/events.hpp"
65 #include "utilities/histogram.hpp"
66 #include "utilities/top.hpp"
67 #include "utilities/utf8.hpp"
68 #ifdef TARGET_OS_FAMILY_linux
69 # include "jvm_linux.h"
70 #endif
71 #ifdef TARGET_OS_FAMILY_solaris
72 # include "jvm_solaris.h"
73 #endif
74 #ifdef TARGET_OS_FAMILY_windows
75 # include "jvm_windows.h"
76 #endif
77 #ifdef TARGET_OS_FAMILY_bsd
78 # include "jvm_bsd.h"
79 #endif
80
81 #include <errno.h>
82
83 #ifndef USDT2
84 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
86 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
87 #endif /* !USDT2 */
88
89 /*
90 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
91 such ctors and calls MUST NOT come between an oop declaration/init and its
92 usage because if objects are move this may cause various memory stomps, bus
93 errors and segfaults. Here is a cookbook for causing so called "naked oop
94 failures":
95
96 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
97 JVMWrapper("JVM_GetClassDeclaredFields");
98
99 // Object address to be held directly in mirror & not visible to GC
100 oop mirror = JNIHandles::resolve_non_null(ofClass);
101
102 // If this ctor can hit a safepoint, moving objects around, then
103 ComplexConstructor foo;
104
105 // Boom! mirror may point to JUNK instead of the intended object
106 (some dereference of mirror)
107
108 // Here's another call that may block for GC, making mirror stale
109 MutexLocker ml(some_lock);
110
111 // And here's an initializer that can result in a stale oop
112 // all in one step.
113 oop o = call_that_can_throw_exception(TRAPS);
114
115
116 The solution is to keep the oop declaration BELOW the ctor or function
117 call that might cause a GC, do another resolve to reassign the oop, or
118 consider use of a Handle instead of an oop so there is immunity from object
119 motion. But note that the "QUICK" entries below do not have a handlemark
120 and thus can only support use of handles passed in.
121 */
122
123 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
124 ResourceMark rm;
125 int line_number = -1;
126 const char * source_file = NULL;
127 const char * trace = "explicit";
128 InstanceKlass* caller = NULL;
129 JavaThread* jthread = JavaThread::current();
130 if (jthread->has_last_Java_frame()) {
131 vframeStream vfst(jthread);
132
133 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
134 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
135 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
136 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
137 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
138
139 Method* last_caller = NULL;
140
141 while (!vfst.at_end()) {
142 Method* m = vfst.method();
143 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
144 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
145 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
146 break;
147 }
148 last_caller = m;
149 vfst.next();
150 }
151 // if this is called from Class.forName0 and that is called from Class.forName,
152 // then print the caller of Class.forName. If this is Class.loadClass, then print
153 // that caller, otherwise keep quiet since this should be picked up elsewhere.
154 bool found_it = false;
155 if (!vfst.at_end() &&
156 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
157 vfst.method()->name() == vmSymbols::forName0_name()) {
158 vfst.next();
159 if (!vfst.at_end() &&
160 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
161 vfst.method()->name() == vmSymbols::forName_name()) {
162 vfst.next();
163 found_it = true;
164 }
165 } else if (last_caller != NULL &&
166 last_caller->method_holder()->name() ==
167 vmSymbols::java_lang_ClassLoader() &&
168 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
169 last_caller->name() == vmSymbols::loadClass_name())) {
170 found_it = true;
171 } else if (!vfst.at_end()) {
172 if (vfst.method()->is_native()) {
173 // JNI call
174 found_it = true;
175 }
176 }
177 if (found_it && !vfst.at_end()) {
178 // found the caller
179 caller = vfst.method()->method_holder();
180 line_number = vfst.method()->line_number_from_bci(vfst.bci());
181 if (line_number == -1) {
182 // show method name if it's a native method
183 trace = vfst.method()->name_and_sig_as_C_string();
184 }
185 Symbol* s = caller->source_file_name();
186 if (s != NULL) {
187 source_file = s->as_C_string();
188 }
189 }
190 }
191 if (caller != NULL) {
192 if (to_class != caller) {
193 const char * from = caller->external_name();
194 const char * to = to_class->external_name();
195 // print in a single call to reduce interleaving between threads
196 if (source_file != NULL) {
197 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
198 } else {
199 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
200 }
201 }
202 }
203 }
204
205 void trace_class_resolution(Klass* to_class) {
206 EXCEPTION_MARK;
207 trace_class_resolution_impl(to_class, THREAD);
208 if (HAS_PENDING_EXCEPTION) {
209 CLEAR_PENDING_EXCEPTION;
210 }
211 }
212
213 // Wrapper to trace JVM functions
214
215 #ifdef ASSERT
216 class JVMTraceWrapper : public StackObj {
217 public:
218 JVMTraceWrapper(const char* format, ...) {
219 if (TraceJVMCalls) {
220 va_list ap;
221 va_start(ap, format);
222 tty->print("JVM ");
223 tty->vprint_cr(format, ap);
224 va_end(ap);
225 }
226 }
227 };
228
229 Histogram* JVMHistogram;
230 volatile jint JVMHistogram_lock = 0;
231
232 class JVMHistogramElement : public HistogramElement {
233 public:
234 JVMHistogramElement(const char* name);
235 };
236
237 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
238 _name = elementName;
239 uintx count = 0;
240
241 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
242 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
243 count +=1;
244 if ( (WarnOnStalledSpinLock > 0)
245 && (count % WarnOnStalledSpinLock == 0)) {
246 warning("JVMHistogram_lock seems to be stalled");
247 }
248 }
249 }
250
251 if(JVMHistogram == NULL)
252 JVMHistogram = new Histogram("JVM Call Counts",100);
253
254 JVMHistogram->add_element(this);
255 Atomic::dec(&JVMHistogram_lock);
256 }
257
258 #define JVMCountWrapper(arg) \
259 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
260 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
261
262 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
263 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
264 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
265 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
266 #else
267 #define JVMWrapper(arg1)
268 #define JVMWrapper2(arg1, arg2)
269 #define JVMWrapper3(arg1, arg2, arg3)
270 #define JVMWrapper4(arg1, arg2, arg3, arg4)
271 #endif
272
273
274 // Interface version /////////////////////////////////////////////////////////////////////
275
276
277 JVM_LEAF(jint, JVM_GetInterfaceVersion())
278 return JVM_INTERFACE_VERSION;
279 JVM_END
280
281
282 // java.lang.System //////////////////////////////////////////////////////////////////////
283
284
285 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
286 JVMWrapper("JVM_CurrentTimeMillis");
287 return os::javaTimeMillis();
288 JVM_END
289
290 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
291 JVMWrapper("JVM_NanoTime");
292 return os::javaTimeNanos();
293 JVM_END
294
295
296 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
297 jobject dst, jint dst_pos, jint length))
298 JVMWrapper("JVM_ArrayCopy");
299 // Check if we have null pointers
300 if (src == NULL || dst == NULL) {
301 THROW(vmSymbols::java_lang_NullPointerException());
302 }
303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
305 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
306 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
307 // Do copy
308 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
309 JVM_END
310
311
312 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
313 JavaValue r(T_OBJECT);
314 // public synchronized Object put(Object key, Object value);
315 HandleMark hm(THREAD);
316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
318 JavaCalls::call_virtual(&r,
319 props,
320 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
321 vmSymbols::put_name(),
322 vmSymbols::object_object_object_signature(),
323 key_str,
324 value_str,
325 THREAD);
326 }
327
328
329 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
330
331
332 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
333 JVMWrapper("JVM_InitProperties");
334 ResourceMark rm;
335
336 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
337
338 // System property list includes both user set via -D option and
339 // jvm system specific properties.
340 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
341 PUTPROP(props, p->key(), p->value());
342 }
343
344 // Convert the -XX:MaxDirectMemorySize= command line flag
345 // to the sun.nio.MaxDirectMemorySize property.
346 // Do this after setting user properties to prevent people
347 // from setting the value with a -D option, as requested.
348 {
349 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
350 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
351 } else {
352 char as_chars[256];
353 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
354 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
355 }
356 }
357
358 // JVM monitoring and management support
359 // Add the sun.management.compiler property for the compiler's name
360 {
361 #undef CSIZE
362 #if defined(_LP64) || defined(_WIN64)
363 #define CSIZE "64-Bit "
364 #else
365 #define CSIZE
366 #endif // 64bit
367
368 #ifdef TIERED
369 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
370 #else
371 #if defined(COMPILER1)
372 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
373 #elif defined(COMPILER2)
374 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
375 #else
376 const char* compiler_name = "";
377 #endif // compilers
378 #endif // TIERED
379
380 if (*compiler_name != '\0' &&
381 (Arguments::mode() != Arguments::_int)) {
382 PUTPROP(props, "sun.management.compiler", compiler_name);
383 }
384 }
385
386 return properties;
387 JVM_END
388
389
390 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
391
392 extern volatile jint vm_created;
393
394 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
395 if (vm_created != 0 && (code == 0)) {
396 // The VM is about to exit. We call back into Java to check whether finalizers should be run
397 Universe::run_finalizers_on_exit();
398 }
399 before_exit(thread);
400 vm_exit(code);
401 JVM_END
402
403
404 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
405 before_exit(thread);
406 vm_exit(code);
407 JVM_END
408
409
410 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
411 register_on_exit_function(func);
412 JVM_END
413
414
415 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
416 JVMWrapper("JVM_GC");
417 if (!DisableExplicitGC) {
418 Universe::heap()->collect(GCCause::_java_lang_system_gc);
419 }
420 JVM_END
421
422
423 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
424 JVMWrapper("JVM_MaxObjectInspectionAge");
425 return Universe::heap()->millis_since_last_gc();
426 JVM_END
427
428
429 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
430 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
431 JVM_END
432
433
434 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
435 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
436 JVM_END
437
438 static inline jlong convert_size_t_to_jlong(size_t val) {
439 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
440 NOT_LP64 (return (jlong)val;)
441 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
442 }
443
444 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
445 JVMWrapper("JVM_TotalMemory");
446 size_t n = Universe::heap()->capacity();
447 return convert_size_t_to_jlong(n);
448 JVM_END
449
450
451 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
452 JVMWrapper("JVM_FreeMemory");
453 CollectedHeap* ch = Universe::heap();
454 size_t n;
455 {
456 MutexLocker x(Heap_lock);
457 n = ch->capacity() - ch->used();
458 }
459 return convert_size_t_to_jlong(n);
460 JVM_END
461
462
463 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
464 JVMWrapper("JVM_MaxMemory");
465 size_t n = Universe::heap()->max_capacity();
466 return convert_size_t_to_jlong(n);
467 JVM_END
468
469
470 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
471 JVMWrapper("JVM_ActiveProcessorCount");
472 return os::active_processor_count();
473 JVM_END
474
475
476
477 // java.lang.Throwable //////////////////////////////////////////////////////
478
479
480 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
481 JVMWrapper("JVM_FillInStackTrace");
482 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
483 java_lang_Throwable::fill_in_stack_trace(exception);
484 JVM_END
485
486
487 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
488 JVMWrapper("JVM_PrintStackTrace");
489 // Note: This is no longer used in Merlin, but we still support it for compatibility.
490 oop exception = JNIHandles::resolve_non_null(receiver);
491 oop stream = JNIHandles::resolve_non_null(printable);
492 java_lang_Throwable::print_stack_trace(exception, stream);
493 JVM_END
494
495
496 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
497 JVMWrapper("JVM_GetStackTraceDepth");
498 oop exception = JNIHandles::resolve(throwable);
499 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
500 JVM_END
501
502
503 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
504 JVMWrapper("JVM_GetStackTraceElement");
505 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
506 oop exception = JNIHandles::resolve(throwable);
507 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
508 return JNIHandles::make_local(env, element);
509 JVM_END
510
511
512 // java.lang.Object ///////////////////////////////////////////////
513
514
515 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
516 JVMWrapper("JVM_IHashCode");
517 // as implemented in the classic virtual machine; return 0 if object is NULL
518 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
519 JVM_END
520
521
522 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
523 JVMWrapper("JVM_MonitorWait");
524 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
525 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
526 if (JvmtiExport::should_post_monitor_wait()) {
527 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
528 }
529 ObjectSynchronizer::wait(obj, ms, CHECK);
530 JVM_END
531
532
533 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
534 JVMWrapper("JVM_MonitorNotify");
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
536 ObjectSynchronizer::notify(obj, CHECK);
537 JVM_END
538
539
540 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
541 JVMWrapper("JVM_MonitorNotifyAll");
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
543 ObjectSynchronizer::notifyall(obj, CHECK);
544 JVM_END
545
546
547 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
548 JVMWrapper("JVM_Clone");
549 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
550 const KlassHandle klass (THREAD, obj->klass());
551 JvmtiVMObjectAllocEventCollector oam;
552
553 #ifdef ASSERT
554 // Just checking that the cloneable flag is set correct
555 if (obj->is_array()) {
556 guarantee(klass->is_cloneable(), "all arrays are cloneable");
557 } else {
558 guarantee(obj->is_instance(), "should be instanceOop");
559 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
560 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
561 }
562 #endif
563
564 // Check if class of obj supports the Cloneable interface.
565 // All arrays are considered to be cloneable (See JLS 20.1.5)
566 if (!klass->is_cloneable()) {
567 ResourceMark rm(THREAD);
568 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
569 }
570
571 // Make shallow object copy
572 const int size = obj->size();
573 oop new_obj = NULL;
574 if (obj->is_array()) {
575 const int length = ((arrayOop)obj())->length();
576 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
577 } else {
578 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
579 }
580 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
581 // is modifying a reference field in the clonee, a non-oop-atomic copy might
582 // be suspended in the middle of copying the pointer and end up with parts
583 // of two different pointers in the field. Subsequent dereferences will crash.
584 // 4846409: an oop-copy of objects with long or double fields or arrays of same
585 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
586 // of oops. We know objects are aligned on a minimum of an jlong boundary.
587 // The same is true of StubRoutines::object_copy and the various oop_copy
588 // variants, and of the code generated by the inline_native_clone intrinsic.
589 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
590 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
591 (size_t)align_object_size(size) / HeapWordsPerLong);
592 // Clear the header
593 new_obj->init_mark();
594
595 // Store check (mark entire object and let gc sort it out)
596 BarrierSet* bs = Universe::heap()->barrier_set();
597 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
598 bs->write_region(MemRegion((HeapWord*)new_obj, size));
599
600 // Caution: this involves a java upcall, so the clone should be
601 // "gc-robust" by this stage.
602 if (klass->has_finalizer()) {
603 assert(obj->is_instance(), "should be instanceOop");
604 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
605 }
606
607 return JNIHandles::make_local(env, oop(new_obj));
608 JVM_END
609
610 // java.lang.Compiler ////////////////////////////////////////////////////
611
612 // The initial cuts of the HotSpot VM will not support JITs, and all existing
613 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
614 // functions are all silently ignored unless JVM warnings are printed.
615
616 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
617 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
618 JVM_END
619
620
621 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
622 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
623 return JNI_FALSE;
624 JVM_END
625
626
627 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
628 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
629 return JNI_FALSE;
630 JVM_END
631
632
633 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
634 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
635 return JNI_FALSE;
636 JVM_END
637
638
639 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
640 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
641 return NULL;
642 JVM_END
643
644
645 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
646 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
647 JVM_END
648
649
650 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
651 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
652 JVM_END
653
654
655
656 // Error message support //////////////////////////////////////////////////////
657
658 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
659 JVMWrapper("JVM_GetLastErrorString");
660 return (jint)os::lasterror(buf, len);
661 JVM_END
662
663
664 // java.io.File ///////////////////////////////////////////////////////////////
665
666 JVM_LEAF(char*, JVM_NativePath(char* path))
667 JVMWrapper2("JVM_NativePath (%s)", path);
668 return os::native_path(path);
669 JVM_END
670
671
672 // Misc. class handling ///////////////////////////////////////////////////////////
673
674
675 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
676 JVMWrapper("JVM_GetCallerClass");
677 Klass* k = thread->security_get_caller_class(depth);
678 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
679 JVM_END
680
681
682 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
683 JVMWrapper("JVM_FindPrimitiveClass");
684 oop mirror = NULL;
685 BasicType t = name2type(utf);
686 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
687 mirror = Universe::java_mirror(t);
688 }
689 if (mirror == NULL) {
690 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
691 } else {
692 return (jclass) JNIHandles::make_local(env, mirror);
693 }
694 JVM_END
695
696
697 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
698 JVMWrapper("JVM_ResolveClass");
699 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
700 JVM_END
701
702
703 // Returns a class loaded by the bootstrap class loader; or null
704 // if not found. ClassNotFoundException is not thrown.
705 //
706 // Rationale behind JVM_FindClassFromBootLoader
707 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
708 // b> because of (a) java.dll has a direct dependecy on the unexported
709 // private symbol "_JVM_FindClassFromClassLoader@20".
710 // c> the launcher cannot use the private symbol as it dynamically opens
711 // the entry point, so if something changes, the launcher will fail
712 // unexpectedly at runtime, it is safest for the launcher to dlopen a
713 // stable exported interface.
714 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
715 // signature to change from _JVM_FindClassFromClassLoader@20 to
716 // JVM_FindClassFromClassLoader and will not be backward compatible
717 // with older JDKs.
718 // Thus a public/stable exported entry point is the right solution,
719 // public here means public in linker semantics, and is exported only
720 // to the JDK, and is not intended to be a public API.
721
722 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
723 const char* name))
724 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
725
726 // Java libraries should ensure that name is never null...
727 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
728 // It's impossible to create this class; the name cannot fit
729 // into the constant pool.
730 return NULL;
731 }
732
733 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
734 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
735 if (k == NULL) {
736 return NULL;
737 }
738
739 if (TraceClassResolution) {
740 trace_class_resolution(k);
741 }
742 return (jclass) JNIHandles::make_local(env, k->java_mirror());
743 JVM_END
744
745 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
746 jboolean init, jobject loader,
747 jboolean throwError))
748 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
749 throwError ? "error" : "exception");
750 // Java libraries should ensure that name is never null...
751 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
752 // It's impossible to create this class; the name cannot fit
753 // into the constant pool.
754 if (throwError) {
755 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
756 } else {
757 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
758 }
759 }
760 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
761 Handle h_loader(THREAD, JNIHandles::resolve(loader));
762 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
763 Handle(), throwError, THREAD);
764
765 if (TraceClassResolution && result != NULL) {
766 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
767 }
768 return result;
769 JVM_END
770
771
772 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
773 jboolean init, jclass from))
774 JVMWrapper2("JVM_FindClassFromClass %s", name);
775 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
776 // It's impossible to create this class; the name cannot fit
777 // into the constant pool.
778 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
779 }
780 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
781 oop from_class_oop = JNIHandles::resolve(from);
782 Klass* from_class = (from_class_oop == NULL)
783 ? (Klass*)NULL
784 : java_lang_Class::as_Klass(from_class_oop);
785 oop class_loader = NULL;
786 oop protection_domain = NULL;
787 if (from_class != NULL) {
788 class_loader = from_class->class_loader();
789 protection_domain = from_class->protection_domain();
790 }
791 Handle h_loader(THREAD, class_loader);
792 Handle h_prot (THREAD, protection_domain);
793 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
794 h_prot, true, thread);
795
796 if (TraceClassResolution && result != NULL) {
797 // this function is generally only used for class loading during verification.
798 ResourceMark rm;
799 oop from_mirror = JNIHandles::resolve_non_null(from);
800 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
801 const char * from_name = from_class->external_name();
802
803 oop mirror = JNIHandles::resolve_non_null(result);
804 Klass* to_class = java_lang_Class::as_Klass(mirror);
805 const char * to = to_class->external_name();
806 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
807 }
808
809 return result;
810 JVM_END
811
812 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
813 if (loader.is_null()) {
814 return;
815 }
816
817 // check whether the current caller thread holds the lock or not.
818 // If not, increment the corresponding counter
819 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
820 ObjectSynchronizer::owner_self) {
821 counter->inc();
822 }
823 }
824
825 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
826 // and JVM_DefineClassWithSourceCond()
827 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
828 jobject loader, const jbyte *buf,
829 jsize len, jobject pd, const char *source,
830 jboolean verify, TRAPS) {
831 if (source == NULL) source = "__JVM_DefineClass__";
832
833 assert(THREAD->is_Java_thread(), "must be a JavaThread");
834 JavaThread* jt = (JavaThread*) THREAD;
835
836 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
837 ClassLoader::perf_define_appclass_selftime(),
838 ClassLoader::perf_define_appclasses(),
839 jt->get_thread_stat()->perf_recursion_counts_addr(),
840 jt->get_thread_stat()->perf_timers_addr(),
841 PerfClassTraceTime::DEFINE_CLASS);
842
843 if (UsePerfData) {
844 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
845 }
846
847 // Since exceptions can be thrown, class initialization can take place
848 // if name is NULL no check for class name in .class stream has to be made.
849 TempNewSymbol class_name = NULL;
850 if (name != NULL) {
851 const int str_len = (int)strlen(name);
852 if (str_len > Symbol::max_length()) {
853 // It's impossible to create this class; the name cannot fit
854 // into the constant pool.
855 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
856 }
857 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
858 }
859
860 ResourceMark rm(THREAD);
861 ClassFileStream st((u1*) buf, len, (char *)source);
862 Handle class_loader (THREAD, JNIHandles::resolve(loader));
863 if (UsePerfData) {
864 is_lock_held_by_thread(class_loader,
865 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
866 THREAD);
867 }
868 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
869 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
870 protection_domain, &st,
871 verify != 0,
872 CHECK_NULL);
873
874 if (TraceClassResolution && k != NULL) {
875 trace_class_resolution(k);
876 }
877
878 return (jclass) JNIHandles::make_local(env, k->java_mirror());
879 }
880
881
882 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
883 JVMWrapper2("JVM_DefineClass %s", name);
884
885 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
886 JVM_END
887
888
889 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
890 JVMWrapper2("JVM_DefineClassWithSource %s", name);
891
892 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
893 JVM_END
894
895 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
896 jobject loader, const jbyte *buf,
897 jsize len, jobject pd,
898 const char *source, jboolean verify))
899 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
900
901 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
902 JVM_END
903
904 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
905 JVMWrapper("JVM_FindLoadedClass");
906 ResourceMark rm(THREAD);
907
908 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
909 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
910
911 const char* str = java_lang_String::as_utf8_string(string());
912 // Sanity check, don't expect null
913 if (str == NULL) return NULL;
914
915 const int str_len = (int)strlen(str);
916 if (str_len > Symbol::max_length()) {
917 // It's impossible to create this class; the name cannot fit
918 // into the constant pool.
919 return NULL;
920 }
921 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
922
923 // Security Note:
924 // The Java level wrapper will perform the necessary security check allowing
925 // us to pass the NULL as the initiating class loader.
926 Handle h_loader(THREAD, JNIHandles::resolve(loader));
927 if (UsePerfData) {
928 is_lock_held_by_thread(h_loader,
929 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
930 THREAD);
931 }
932
933 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
934 h_loader,
935 Handle(),
936 CHECK_NULL);
937
938 return (k == NULL) ? NULL :
939 (jclass) JNIHandles::make_local(env, k->java_mirror());
940 JVM_END
941
942
943 // Reflection support //////////////////////////////////////////////////////////////////////////////
944
945 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
946 assert (cls != NULL, "illegal class");
947 JVMWrapper("JVM_GetClassName");
948 JvmtiVMObjectAllocEventCollector oam;
949 ResourceMark rm(THREAD);
950 const char* name;
951 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
952 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
953 } else {
954 // Consider caching interned string in Klass
955 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
956 assert(k->is_klass(), "just checking");
957 name = k->external_name();
958 }
959 oop result = StringTable::intern((char*) name, CHECK_NULL);
960 return (jstring) JNIHandles::make_local(env, result);
961 JVM_END
962
963
964 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
965 JVMWrapper("JVM_GetClassInterfaces");
966 JvmtiVMObjectAllocEventCollector oam;
967 oop mirror = JNIHandles::resolve_non_null(cls);
968
969 // Special handling for primitive objects
970 if (java_lang_Class::is_primitive(mirror)) {
971 // Primitive objects does not have any interfaces
972 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
973 return (jobjectArray) JNIHandles::make_local(env, r);
974 }
975
976 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
977 // Figure size of result array
978 int size;
979 if (klass->oop_is_instance()) {
980 size = InstanceKlass::cast(klass())->local_interfaces()->length();
981 } else {
982 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
983 size = 2;
984 }
985
986 // Allocate result array
987 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
988 objArrayHandle result (THREAD, r);
989 // Fill in result
990 if (klass->oop_is_instance()) {
991 // Regular instance klass, fill in all local interfaces
992 for (int index = 0; index < size; index++) {
993 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
994 result->obj_at_put(index, k->java_mirror());
995 }
996 } else {
997 // All arrays implement java.lang.Cloneable and java.io.Serializable
998 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
999 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1000 }
1001 return (jobjectArray) JNIHandles::make_local(env, result());
1002 JVM_END
1003
1004
1005 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1006 JVMWrapper("JVM_GetClassLoader");
1007 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1008 return NULL;
1009 }
1010 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1011 oop loader = k->class_loader();
1012 return JNIHandles::make_local(env, loader);
1013 JVM_END
1014
1015
1016 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1017 JVMWrapper("JVM_IsInterface");
1018 oop mirror = JNIHandles::resolve_non_null(cls);
1019 if (java_lang_Class::is_primitive(mirror)) {
1020 return JNI_FALSE;
1021 }
1022 Klass* k = java_lang_Class::as_Klass(mirror);
1023 jboolean result = k->is_interface();
1024 assert(!result || k->oop_is_instance(),
1025 "all interfaces are instance types");
1026 // The compiler intrinsic for isInterface tests the
1027 // Klass::_access_flags bits in the same way.
1028 return result;
1029 JVM_END
1030
1031
1032 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1033 JVMWrapper("JVM_GetClassSigners");
1034 JvmtiVMObjectAllocEventCollector oam;
1035 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1036 // There are no signers for primitive types
1037 return NULL;
1038 }
1039
1040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1041 objArrayOop signers = NULL;
1042 if (k->oop_is_instance()) {
1043 signers = InstanceKlass::cast(k)->signers();
1044 }
1045
1046 // If there are no signers set in the class, or if the class
1047 // is an array, return NULL.
1048 if (signers == NULL) return NULL;
1049
1050 // copy of the signers array
1051 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1052 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1053 for (int index = 0; index < signers->length(); index++) {
1054 signers_copy->obj_at_put(index, signers->obj_at(index));
1055 }
1056
1057 // return the copy
1058 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1059 JVM_END
1060
1061
1062 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1063 JVMWrapper("JVM_SetClassSigners");
1064 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1065 // This call is ignored for primitive types and arrays.
1066 // Signers are only set once, ClassLoader.java, and thus shouldn't
1067 // be called with an array. Only the bootstrap loader creates arrays.
1068 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1069 if (k->oop_is_instance()) {
1070 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1071 }
1072 }
1073 JVM_END
1074
1075
1076 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1077 JVMWrapper("JVM_GetProtectionDomain");
1078 if (JNIHandles::resolve(cls) == NULL) {
1079 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1080 }
1081
1082 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1083 // Primitive types does not have a protection domain.
1084 return NULL;
1085 }
1086
1087 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1088 return (jobject) JNIHandles::make_local(env, k->protection_domain());
1089 JVM_END
1090
1091
1092 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1093 // still defined in core libraries as of 1.5.
1094 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1095 JVMWrapper("JVM_SetProtectionDomain");
1096 if (JNIHandles::resolve(cls) == NULL) {
1097 THROW(vmSymbols::java_lang_NullPointerException());
1098 }
1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1100 // Call is ignored for primitive types
1101 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1102
1103 // cls won't be an array, as this called only from ClassLoader.defineClass
1104 if (k->oop_is_instance()) {
1105 oop pd = JNIHandles::resolve(protection_domain);
1106 assert(pd == NULL || pd->is_oop(), "just checking");
1107 InstanceKlass::cast(k)->set_protection_domain(pd);
1108 }
1109 }
1110 JVM_END
1111
1112
1113 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1114 JVMWrapper("JVM_DoPrivileged");
1115
1116 if (action == NULL) {
1117 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1118 }
1119
1120 // Stack allocated list of privileged stack elements
1121 PrivilegedElement pi;
1122
1123 // Check that action object understands "Object run()"
1124 Handle object (THREAD, JNIHandles::resolve(action));
1125
1126 // get run() method
1127 Method* m_oop = object->klass()->uncached_lookup_method(
1128 vmSymbols::run_method_name(),
1129 vmSymbols::void_object_signature());
1130 methodHandle m (THREAD, m_oop);
1131 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1132 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1133 }
1134
1135 // Compute the frame initiating the do privileged operation and setup the privileged stack
1136 vframeStream vfst(thread);
1137 vfst.security_get_caller_frame(1);
1138
1139 if (!vfst.at_end()) {
1140 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1141 thread->set_privileged_stack_top(&pi);
1142 }
1143
1144
1145 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1146 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1147 Handle pending_exception;
1148 JavaValue result(T_OBJECT);
1149 JavaCallArguments args(object);
1150 JavaCalls::call(&result, m, &args, THREAD);
1151
1152 // done with action, remove ourselves from the list
1153 if (!vfst.at_end()) {
1154 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1155 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1156 }
1157
1158 if (HAS_PENDING_EXCEPTION) {
1159 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1160 CLEAR_PENDING_EXCEPTION;
1161
1162 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1163 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1164 // Throw a java.security.PrivilegedActionException(Exception e) exception
1165 JavaCallArguments args(pending_exception);
1166 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1167 vmSymbols::exception_void_signature(),
1168 &args);
1169 }
1170 }
1171
1172 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1173 return JNIHandles::make_local(env, (oop) result.get_jobject());
1174 JVM_END
1175
1176
1177 // Returns the inherited_access_control_context field of the running thread.
1178 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1179 JVMWrapper("JVM_GetInheritedAccessControlContext");
1180 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1181 return JNIHandles::make_local(env, result);
1182 JVM_END
1183
1184 class RegisterArrayForGC {
1185 private:
1186 JavaThread *_thread;
1187 public:
1188 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1189 _thread = thread;
1190 _thread->register_array_for_gc(array);
1191 }
1192
1193 ~RegisterArrayForGC() {
1194 _thread->register_array_for_gc(NULL);
1195 }
1196 };
1197
1198
1199 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1200 JVMWrapper("JVM_GetStackAccessControlContext");
1201 if (!UsePrivilegedStack) return NULL;
1202
1203 ResourceMark rm(THREAD);
1204 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1205 JvmtiVMObjectAllocEventCollector oam;
1206
1207 // count the protection domains on the execution stack. We collapse
1208 // duplicate consecutive protection domains into a single one, as
1209 // well as stopping when we hit a privileged frame.
1210
1211 // Use vframeStream to iterate through Java frames
1212 vframeStream vfst(thread);
1213
1214 oop previous_protection_domain = NULL;
1215 Handle privileged_context(thread, NULL);
1216 bool is_privileged = false;
1217 oop protection_domain = NULL;
1218
1219 for(; !vfst.at_end(); vfst.next()) {
1220 // get method of frame
1221 Method* method = vfst.method();
1222 intptr_t* frame_id = vfst.frame_id();
1223
1224 // check the privileged frames to see if we have a match
1225 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1226 // this frame is privileged
1227 is_privileged = true;
1228 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1229 protection_domain = thread->privileged_stack_top()->protection_domain();
1230 } else {
1231 protection_domain = method->method_holder()->protection_domain();
1232 }
1233
1234 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1235 local_array->push(protection_domain);
1236 previous_protection_domain = protection_domain;
1237 }
1238
1239 if (is_privileged) break;
1240 }
1241
1242
1243 // either all the domains on the stack were system domains, or
1244 // we had a privileged system domain
1245 if (local_array->is_empty()) {
1246 if (is_privileged && privileged_context.is_null()) return NULL;
1247
1248 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1249 return JNIHandles::make_local(env, result);
1250 }
1251
1252 // the resource area must be registered in case of a gc
1253 RegisterArrayForGC ragc(thread, local_array);
1254 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1255 local_array->length(), CHECK_NULL);
1256 objArrayHandle h_context(thread, context);
1257 for (int index = 0; index < local_array->length(); index++) {
1258 h_context->obj_at_put(index, local_array->at(index));
1259 }
1260
1261 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1262
1263 return JNIHandles::make_local(env, result);
1264 JVM_END
1265
1266
1267 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1268 JVMWrapper("JVM_IsArrayClass");
1269 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1270 return (k != NULL) && k->oop_is_array() ? true : false;
1271 JVM_END
1272
1273
1274 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1275 JVMWrapper("JVM_IsPrimitiveClass");
1276 oop mirror = JNIHandles::resolve_non_null(cls);
1277 return (jboolean) java_lang_Class::is_primitive(mirror);
1278 JVM_END
1279
1280
1281 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1282 JVMWrapper("JVM_GetComponentType");
1283 oop mirror = JNIHandles::resolve_non_null(cls);
1284 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1285 return (jclass) JNIHandles::make_local(env, result);
1286 JVM_END
1287
1288
1289 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1290 JVMWrapper("JVM_GetClassModifiers");
1291 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1292 // Primitive type
1293 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1294 }
1295
1296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1297 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1298 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1299 return k->modifier_flags();
1300 JVM_END
1301
1302
1303 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1304
1305 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1306 JvmtiVMObjectAllocEventCollector oam;
1307 // ofClass is a reference to a java_lang_Class object. The mirror object
1308 // of an InstanceKlass
1309
1310 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1311 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1312 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1313 return (jobjectArray)JNIHandles::make_local(env, result);
1314 }
1315
1316 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1317 InnerClassesIterator iter(k);
1318
1319 if (iter.length() == 0) {
1320 // Neither an inner nor outer class
1321 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1322 return (jobjectArray)JNIHandles::make_local(env, result);
1323 }
1324
1325 // find inner class info
1326 constantPoolHandle cp(thread, k->constants());
1327 int length = iter.length();
1328
1329 // Allocate temp. result array
1330 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1331 objArrayHandle result (THREAD, r);
1332 int members = 0;
1333
1334 for (; !iter.done(); iter.next()) {
1335 int ioff = iter.inner_class_info_index();
1336 int ooff = iter.outer_class_info_index();
1337
1338 if (ioff != 0 && ooff != 0) {
1339 // Check to see if the name matches the class we're looking for
1340 // before attempting to find the class.
1341 if (cp->klass_name_at_matches(k, ooff)) {
1342 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1343 if (outer_klass == k()) {
1344 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1345 instanceKlassHandle inner_klass (THREAD, ik);
1346
1347 // Throws an exception if outer klass has not declared k as
1348 // an inner klass
1349 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1350
1351 result->obj_at_put(members, inner_klass->java_mirror());
1352 members++;
1353 }
1354 }
1355 }
1356 }
1357
1358 if (members != length) {
1359 // Return array of right length
1360 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1361 for(int i = 0; i < members; i++) {
1362 res->obj_at_put(i, result->obj_at(i));
1363 }
1364 return (jobjectArray)JNIHandles::make_local(env, res);
1365 }
1366
1367 return (jobjectArray)JNIHandles::make_local(env, result());
1368 JVM_END
1369
1370
1371 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1372 {
1373 // ofClass is a reference to a java_lang_Class object.
1374 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1375 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1376 return NULL;
1377 }
1378
1379 bool inner_is_member = false;
1380 Klass* outer_klass
1381 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1382 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1383 if (outer_klass == NULL) return NULL; // already a top-level class
1384 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1385 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1386 }
1387 JVM_END
1388
1389 // should be in InstanceKlass.cpp, but is here for historical reasons
1390 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1391 bool* inner_is_member,
1392 TRAPS) {
1393 Thread* thread = THREAD;
1394 InnerClassesIterator iter(k);
1395 if (iter.length() == 0) {
1396 // No inner class info => no declaring class
1397 return NULL;
1398 }
1399
1400 constantPoolHandle i_cp(thread, k->constants());
1401
1402 bool found = false;
1403 Klass* ok;
1404 instanceKlassHandle outer_klass;
1405 *inner_is_member = false;
1406
1407 // Find inner_klass attribute
1408 for (; !iter.done() && !found; iter.next()) {
1409 int ioff = iter.inner_class_info_index();
1410 int ooff = iter.outer_class_info_index();
1411 int noff = iter.inner_name_index();
1412 if (ioff != 0) {
1413 // Check to see if the name matches the class we're looking for
1414 // before attempting to find the class.
1415 if (i_cp->klass_name_at_matches(k, ioff)) {
1416 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1417 found = (k() == inner_klass);
1418 if (found && ooff != 0) {
1419 ok = i_cp->klass_at(ooff, CHECK_NULL);
1420 outer_klass = instanceKlassHandle(thread, ok);
1421 *inner_is_member = true;
1422 }
1423 }
1424 }
1425 }
1426
1427 if (found && outer_klass.is_null()) {
1428 // It may be anonymous; try for that.
1429 int encl_method_class_idx = k->enclosing_method_class_index();
1430 if (encl_method_class_idx != 0) {
1431 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1432 outer_klass = instanceKlassHandle(thread, ok);
1433 *inner_is_member = false;
1434 }
1435 }
1436
1437 // If no inner class attribute found for this class.
1438 if (outer_klass.is_null()) return NULL;
1439
1440 // Throws an exception if outer klass has not declared k as an inner klass
1441 // We need evidence that each klass knows about the other, or else
1442 // the system could allow a spoof of an inner class to gain access rights.
1443 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1444 return outer_klass();
1445 }
1446
1447 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1448 assert (cls != NULL, "illegal class");
1449 JVMWrapper("JVM_GetClassSignature");
1450 JvmtiVMObjectAllocEventCollector oam;
1451 ResourceMark rm(THREAD);
1452 // Return null for arrays and primatives
1453 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1455 if (k->oop_is_instance()) {
1456 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1457 if (sym == NULL) return NULL;
1458 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1459 return (jstring) JNIHandles::make_local(env, str());
1460 }
1461 }
1462 return NULL;
1463 JVM_END
1464
1465
1466 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1467 assert (cls != NULL, "illegal class");
1468 JVMWrapper("JVM_GetClassAnnotations");
1469 ResourceMark rm(THREAD);
1470 // Return null for arrays and primitives
1471 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1473 if (k->oop_is_instance()) {
1474 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1475 return (jbyteArray) JNIHandles::make_local(env, a);
1476 }
1477 }
1478 return NULL;
1479 JVM_END
1480
1481
1482 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1483 assert(field != NULL, "illegal field");
1484 JVMWrapper("JVM_GetFieldAnnotations");
1485
1486 // some of this code was adapted from from jni_FromReflectedField
1487
1488 // field is a handle to a java.lang.reflect.Field object
1489 oop reflected = JNIHandles::resolve_non_null(field);
1490 oop mirror = java_lang_reflect_Field::clazz(reflected);
1491 Klass* k = java_lang_Class::as_Klass(mirror);
1492 int slot = java_lang_reflect_Field::slot(reflected);
1493 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1494
1495 fieldDescriptor fd;
1496 KlassHandle kh(THREAD, k);
1497 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1498
1499 if (modifiers & JVM_ACC_STATIC) {
1500 // for static fields we only look in the current class
1501 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1502 assert(false, "cannot find static field");
1503 return NULL; // robustness
1504 }
1505 } else {
1506 // for instance fields we start with the current class and work
1507 // our way up through the superclass chain
1508 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1509 assert(false, "cannot find instance field");
1510 return NULL; // robustness
1511 }
1512 }
1513
1514 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1515 JVM_END
1516
1517
1518 static Method* jvm_get_method_common(jobject method) {
1519 // some of this code was adapted from from jni_FromReflectedMethod
1520
1521 oop reflected = JNIHandles::resolve_non_null(method);
1522 oop mirror = NULL;
1523 int slot = 0;
1524
1525 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1526 mirror = java_lang_reflect_Constructor::clazz(reflected);
1527 slot = java_lang_reflect_Constructor::slot(reflected);
1528 } else {
1529 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1530 "wrong type");
1531 mirror = java_lang_reflect_Method::clazz(reflected);
1532 slot = java_lang_reflect_Method::slot(reflected);
1533 }
1534 Klass* k = java_lang_Class::as_Klass(mirror);
1535
1536 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1537 if (m == NULL) {
1538 assert(false, "cannot find method");
1539 return NULL; // robustness
1540 }
1541
1542 return m;
1543 }
1544
1545
1546 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1547 JVMWrapper("JVM_GetMethodAnnotations");
1548
1549 // method is a handle to a java.lang.reflect.Method object
1550 Method* m = jvm_get_method_common(method);
1551 return (jbyteArray) JNIHandles::make_local(env,
1552 Annotations::make_java_array(m->annotations(), THREAD));
1553 JVM_END
1554
1555
1556 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1557 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1558
1559 // method is a handle to a java.lang.reflect.Method object
1560 Method* m = jvm_get_method_common(method);
1561 return (jbyteArray) JNIHandles::make_local(env,
1562 Annotations::make_java_array(m->annotation_default(), THREAD));
1563 JVM_END
1564
1565
1566 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1567 JVMWrapper("JVM_GetMethodParameterAnnotations");
1568
1569 // method is a handle to a java.lang.reflect.Method object
1570 Method* m = jvm_get_method_common(method);
1571 return (jbyteArray) JNIHandles::make_local(env,
1572 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1573 JVM_END
1574
1575 /* Type use annotations support (JDK 1.8) */
1576
1577 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1578 assert (cls != NULL, "illegal class");
1579 JVMWrapper("JVM_GetClassTypeAnnotations");
1580 ResourceMark rm(THREAD);
1581 // Return null for arrays and primitives
1582 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1583 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1584 if (k->oop_is_instance()) {
1585 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->type_annotations()->class_annotations(), CHECK_NULL);
1586 return (jbyteArray) JNIHandles::make_local(env, a);
1587 }
1588 }
1589 return NULL;
1590 JVM_END
1591
1592 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1593 {
1594 JVMWrapper("JVM_GetMethodParameters");
1595 // method is a handle to a java.lang.reflect.Method object
1596 Method* method_ptr = jvm_get_method_common(method);
1597 methodHandle mh (THREAD, method_ptr);
1598 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1599 const int num_params = mh->method_parameters_length();
1600
1601 if(0 != num_params) {
1602 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1603 objArrayHandle result (THREAD, result_oop);
1604
1605 for(int i = 0; i < num_params; i++) {
1606 MethodParametersElement* params = mh->method_parameters_start();
1607 Symbol* const sym = mh->constants()->symbol_at(params[i].name_cp_index);
1608 oop param = Reflection::new_parameter(reflected_method, i, sym,
1609 params[i].flags, CHECK_NULL);
1610 result->obj_at_put(i, param);
1611 }
1612 return (jobjectArray)JNIHandles::make_local(env, result());
1613 } else {
1614 return (jobjectArray)NULL;
1615 }
1616 }
1617 JVM_END
1618
1619 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1620
1621 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1622 {
1623 JVMWrapper("JVM_GetClassDeclaredFields");
1624 JvmtiVMObjectAllocEventCollector oam;
1625
1626 // Exclude primitive types and array types
1627 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1628 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1629 // Return empty array
1630 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1631 return (jobjectArray) JNIHandles::make_local(env, res);
1632 }
1633
1634 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1635 constantPoolHandle cp(THREAD, k->constants());
1636
1637 // Ensure class is linked
1638 k->link_class(CHECK_NULL);
1639
1640 // 4496456 We need to filter out java.lang.Throwable.backtrace
1641 bool skip_backtrace = false;
1642
1643 // Allocate result
1644 int num_fields;
1645
1646 if (publicOnly) {
1647 num_fields = 0;
1648 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1649 if (fs.access_flags().is_public()) ++num_fields;
1650 }
1651 } else {
1652 num_fields = k->java_fields_count();
1653
1654 if (k() == SystemDictionary::Throwable_klass()) {
1655 num_fields--;
1656 skip_backtrace = true;
1657 }
1658 }
1659
1660 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1661 objArrayHandle result (THREAD, r);
1662
1663 int out_idx = 0;
1664 fieldDescriptor fd;
1665 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1666 if (skip_backtrace) {
1667 // 4496456 skip java.lang.Throwable.backtrace
1668 int offset = fs.offset();
1669 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1670 }
1671
1672 if (!publicOnly || fs.access_flags().is_public()) {
1673 fd.initialize(k(), fs.index());
1674 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1675 result->obj_at_put(out_idx, field);
1676 ++out_idx;
1677 }
1678 }
1679 assert(out_idx == num_fields, "just checking");
1680 return (jobjectArray) JNIHandles::make_local(env, result());
1681 }
1682 JVM_END
1683
1684 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1685 {
1686 JVMWrapper("JVM_GetClassDeclaredMethods");
1687 JvmtiVMObjectAllocEventCollector oam;
1688
1689 // Exclude primitive types and array types
1690 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1691 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1692 // Return empty array
1693 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1694 return (jobjectArray) JNIHandles::make_local(env, res);
1695 }
1696
1697 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1698
1699 // Ensure class is linked
1700 k->link_class(CHECK_NULL);
1701
1702 Array<Method*>* methods = k->methods();
1703 int methods_length = methods->length();
1704 int num_methods = 0;
1705
1706 int i;
1707 for (i = 0; i < methods_length; i++) {
1708 methodHandle method(THREAD, methods->at(i));
1709 if (!method->is_initializer()) {
1710 if (!publicOnly || method->is_public()) {
1711 ++num_methods;
1712 }
1713 }
1714 }
1715
1716 // Allocate result
1717 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1718 objArrayHandle result (THREAD, r);
1719
1720 int out_idx = 0;
1721 for (i = 0; i < methods_length; i++) {
1722 methodHandle method(THREAD, methods->at(i));
1723 if (!method->is_initializer()) {
1724 if (!publicOnly || method->is_public()) {
1725 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1726 result->obj_at_put(out_idx, m);
1727 ++out_idx;
1728 }
1729 }
1730 }
1731 assert(out_idx == num_methods, "just checking");
1732 return (jobjectArray) JNIHandles::make_local(env, result());
1733 }
1734 JVM_END
1735
1736 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1737 {
1738 JVMWrapper("JVM_GetClassDeclaredConstructors");
1739 JvmtiVMObjectAllocEventCollector oam;
1740
1741 // Exclude primitive types and array types
1742 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1743 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1744 // Return empty array
1745 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1746 return (jobjectArray) JNIHandles::make_local(env, res);
1747 }
1748
1749 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1750
1751 // Ensure class is linked
1752 k->link_class(CHECK_NULL);
1753
1754 Array<Method*>* methods = k->methods();
1755 int methods_length = methods->length();
1756 int num_constructors = 0;
1757
1758 int i;
1759 for (i = 0; i < methods_length; i++) {
1760 methodHandle method(THREAD, methods->at(i));
1761 if (method->is_initializer() && !method->is_static()) {
1762 if (!publicOnly || method->is_public()) {
1763 ++num_constructors;
1764 }
1765 }
1766 }
1767
1768 // Allocate result
1769 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1770 objArrayHandle result(THREAD, r);
1771
1772 int out_idx = 0;
1773 for (i = 0; i < methods_length; i++) {
1774 methodHandle method(THREAD, methods->at(i));
1775 if (method->is_initializer() && !method->is_static()) {
1776 if (!publicOnly || method->is_public()) {
1777 oop m = Reflection::new_constructor(method, CHECK_NULL);
1778 result->obj_at_put(out_idx, m);
1779 ++out_idx;
1780 }
1781 }
1782 }
1783 assert(out_idx == num_constructors, "just checking");
1784 return (jobjectArray) JNIHandles::make_local(env, result());
1785 }
1786 JVM_END
1787
1788 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1789 {
1790 JVMWrapper("JVM_GetClassAccessFlags");
1791 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1792 // Primitive type
1793 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1794 }
1795
1796 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1797 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1798 }
1799 JVM_END
1800
1801
1802 // Constant pool access //////////////////////////////////////////////////////////
1803
1804 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1805 {
1806 JVMWrapper("JVM_GetClassConstantPool");
1807 JvmtiVMObjectAllocEventCollector oam;
1808
1809 // Return null for primitives and arrays
1810 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1811 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1812 if (k->oop_is_instance()) {
1813 instanceKlassHandle k_h(THREAD, k);
1814 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1815 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1816 return JNIHandles::make_local(jcp());
1817 }
1818 }
1819 return NULL;
1820 }
1821 JVM_END
1822
1823
1824 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1825 {
1826 JVMWrapper("JVM_ConstantPoolGetSize");
1827 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1828 return cp->length();
1829 }
1830 JVM_END
1831
1832
1833 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1834 if (!cp->is_within_bounds(index)) {
1835 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1836 }
1837 }
1838
1839
1840 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1841 {
1842 JVMWrapper("JVM_ConstantPoolGetClassAt");
1843 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1844 bounds_check(cp, index, CHECK_NULL);
1845 constantTag tag = cp->tag_at(index);
1846 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1847 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1848 }
1849 Klass* k = cp->klass_at(index, CHECK_NULL);
1850 return (jclass) JNIHandles::make_local(k->java_mirror());
1851 }
1852 JVM_END
1853
1854
1855 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1856 {
1857 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1858 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1859 bounds_check(cp, index, CHECK_NULL);
1860 constantTag tag = cp->tag_at(index);
1861 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1862 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1863 }
1864 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1865 if (k == NULL) return NULL;
1866 return (jclass) JNIHandles::make_local(k->java_mirror());
1867 }
1868 JVM_END
1869
1870 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1871 constantTag tag = cp->tag_at(index);
1872 if (!tag.is_method() && !tag.is_interface_method()) {
1873 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1874 }
1875 int klass_ref = cp->uncached_klass_ref_index_at(index);
1876 Klass* k_o;
1877 if (force_resolution) {
1878 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1879 } else {
1880 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1881 if (k_o == NULL) return NULL;
1882 }
1883 instanceKlassHandle k(THREAD, k_o);
1884 Symbol* name = cp->uncached_name_ref_at(index);
1885 Symbol* sig = cp->uncached_signature_ref_at(index);
1886 methodHandle m (THREAD, k->find_method(name, sig));
1887 if (m.is_null()) {
1888 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1889 }
1890 oop method;
1891 if (!m->is_initializer() || m->is_static()) {
1892 method = Reflection::new_method(m, true, true, CHECK_NULL);
1893 } else {
1894 method = Reflection::new_constructor(m, CHECK_NULL);
1895 }
1896 return JNIHandles::make_local(method);
1897 }
1898
1899 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1900 {
1901 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1902 JvmtiVMObjectAllocEventCollector oam;
1903 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1904 bounds_check(cp, index, CHECK_NULL);
1905 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1906 return res;
1907 }
1908 JVM_END
1909
1910 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1911 {
1912 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1913 JvmtiVMObjectAllocEventCollector oam;
1914 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1915 bounds_check(cp, index, CHECK_NULL);
1916 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1917 return res;
1918 }
1919 JVM_END
1920
1921 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1922 constantTag tag = cp->tag_at(index);
1923 if (!tag.is_field()) {
1924 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1925 }
1926 int klass_ref = cp->uncached_klass_ref_index_at(index);
1927 Klass* k_o;
1928 if (force_resolution) {
1929 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1930 } else {
1931 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1932 if (k_o == NULL) return NULL;
1933 }
1934 instanceKlassHandle k(THREAD, k_o);
1935 Symbol* name = cp->uncached_name_ref_at(index);
1936 Symbol* sig = cp->uncached_signature_ref_at(index);
1937 fieldDescriptor fd;
1938 Klass* target_klass = k->find_field(name, sig, &fd);
1939 if (target_klass == NULL) {
1940 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1941 }
1942 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1943 return JNIHandles::make_local(field);
1944 }
1945
1946 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
1947 {
1948 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1949 JvmtiVMObjectAllocEventCollector oam;
1950 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1951 bounds_check(cp, index, CHECK_NULL);
1952 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1953 return res;
1954 }
1955 JVM_END
1956
1957 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1958 {
1959 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1960 JvmtiVMObjectAllocEventCollector oam;
1961 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1962 bounds_check(cp, index, CHECK_NULL);
1963 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1964 return res;
1965 }
1966 JVM_END
1967
1968 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1969 {
1970 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1971 JvmtiVMObjectAllocEventCollector oam;
1972 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1973 bounds_check(cp, index, CHECK_NULL);
1974 constantTag tag = cp->tag_at(index);
1975 if (!tag.is_field_or_method()) {
1976 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1977 }
1978 int klass_ref = cp->uncached_klass_ref_index_at(index);
1979 Symbol* klass_name = cp->klass_name_at(klass_ref);
1980 Symbol* member_name = cp->uncached_name_ref_at(index);
1981 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1982 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1983 objArrayHandle dest(THREAD, dest_o);
1984 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1985 dest->obj_at_put(0, str());
1986 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1987 dest->obj_at_put(1, str());
1988 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1989 dest->obj_at_put(2, str());
1990 return (jobjectArray) JNIHandles::make_local(dest());
1991 }
1992 JVM_END
1993
1994 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1995 {
1996 JVMWrapper("JVM_ConstantPoolGetIntAt");
1997 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1998 bounds_check(cp, index, CHECK_0);
1999 constantTag tag = cp->tag_at(index);
2000 if (!tag.is_int()) {
2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2002 }
2003 return cp->int_at(index);
2004 }
2005 JVM_END
2006
2007 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2008 {
2009 JVMWrapper("JVM_ConstantPoolGetLongAt");
2010 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2011 bounds_check(cp, index, CHECK_(0L));
2012 constantTag tag = cp->tag_at(index);
2013 if (!tag.is_long()) {
2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2015 }
2016 return cp->long_at(index);
2017 }
2018 JVM_END
2019
2020 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2021 {
2022 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2023 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2024 bounds_check(cp, index, CHECK_(0.0f));
2025 constantTag tag = cp->tag_at(index);
2026 if (!tag.is_float()) {
2027 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2028 }
2029 return cp->float_at(index);
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2034 {
2035 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2036 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037 bounds_check(cp, index, CHECK_(0.0));
2038 constantTag tag = cp->tag_at(index);
2039 if (!tag.is_double()) {
2040 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2041 }
2042 return cp->double_at(index);
2043 }
2044 JVM_END
2045
2046 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2047 {
2048 JVMWrapper("JVM_ConstantPoolGetStringAt");
2049 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2050 bounds_check(cp, index, CHECK_NULL);
2051 constantTag tag = cp->tag_at(index);
2052 if (!tag.is_string()) {
2053 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2054 }
2055 oop str = cp->string_at(index, CHECK_NULL);
2056 return (jstring) JNIHandles::make_local(str);
2057 }
2058 JVM_END
2059
2060 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2061 {
2062 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2063 JvmtiVMObjectAllocEventCollector oam;
2064 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2065 bounds_check(cp, index, CHECK_NULL);
2066 constantTag tag = cp->tag_at(index);
2067 if (!tag.is_symbol()) {
2068 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2069 }
2070 Symbol* sym = cp->symbol_at(index);
2071 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2072 return (jstring) JNIHandles::make_local(str());
2073 }
2074 JVM_END
2075
2076
2077 // Assertion support. //////////////////////////////////////////////////////////
2078
2079 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2080 JVMWrapper("JVM_DesiredAssertionStatus");
2081 assert(cls != NULL, "bad class");
2082
2083 oop r = JNIHandles::resolve(cls);
2084 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2085 if (java_lang_Class::is_primitive(r)) return false;
2086
2087 Klass* k = java_lang_Class::as_Klass(r);
2088 assert(k->oop_is_instance(), "must be an instance klass");
2089 if (! k->oop_is_instance()) return false;
2090
2091 ResourceMark rm(THREAD);
2092 const char* name = k->name()->as_C_string();
2093 bool system_class = k->class_loader() == NULL;
2094 return JavaAssertions::enabled(name, system_class);
2095
2096 JVM_END
2097
2098
2099 // Return a new AssertionStatusDirectives object with the fields filled in with
2100 // command-line assertion arguments (i.e., -ea, -da).
2101 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2102 JVMWrapper("JVM_AssertionStatusDirectives");
2103 JvmtiVMObjectAllocEventCollector oam;
2104 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2105 return JNIHandles::make_local(env, asd);
2106 JVM_END
2107
2108 // Verification ////////////////////////////////////////////////////////////////////////////////
2109
2110 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2111
2112 // RedefineClasses support: bug 6214132 caused verification to fail.
2113 // All functions from this section should call the jvmtiThreadSate function:
2114 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2115 // The function returns a Klass* of the _scratch_class if the verifier
2116 // was invoked in the middle of the class redefinition.
2117 // Otherwise it returns its argument value which is the _the_class Klass*.
2118 // Please, refer to the description in the jvmtiThreadSate.hpp.
2119
2120 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2121 JVMWrapper("JVM_GetClassNameUTF");
2122 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2123 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2124 return k->name()->as_utf8();
2125 JVM_END
2126
2127
2128 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2129 JVMWrapper("JVM_GetClassCPTypes");
2130 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2131 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2132 // types will have length zero if this is not an InstanceKlass
2133 // (length is determined by call to JVM_GetClassCPEntriesCount)
2134 if (k->oop_is_instance()) {
2135 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2136 for (int index = cp->length() - 1; index >= 0; index--) {
2137 constantTag tag = cp->tag_at(index);
2138 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2139 }
2140 }
2141 JVM_END
2142
2143
2144 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2145 JVMWrapper("JVM_GetClassCPEntriesCount");
2146 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2147 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2148 if (!k->oop_is_instance())
2149 return 0;
2150 return InstanceKlass::cast(k)->constants()->length();
2151 JVM_END
2152
2153
2154 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2155 JVMWrapper("JVM_GetClassFieldsCount");
2156 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2157 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2158 if (!k->oop_is_instance())
2159 return 0;
2160 return InstanceKlass::cast(k)->java_fields_count();
2161 JVM_END
2162
2163
2164 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2165 JVMWrapper("JVM_GetClassMethodsCount");
2166 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2168 if (!k->oop_is_instance())
2169 return 0;
2170 return InstanceKlass::cast(k)->methods()->length();
2171 JVM_END
2172
2173
2174 // The following methods, used for the verifier, are never called with
2175 // array klasses, so a direct cast to InstanceKlass is safe.
2176 // Typically, these methods are called in a loop with bounds determined
2177 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2178 // zero for arrays.
2179 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2180 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2181 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2182 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2183 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2184 int length = method->checked_exceptions_length();
2185 if (length > 0) {
2186 CheckedExceptionElement* table= method->checked_exceptions_start();
2187 for (int i = 0; i < length; i++) {
2188 exceptions[i] = table[i].class_cp_index;
2189 }
2190 }
2191 JVM_END
2192
2193
2194 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2195 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2196 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2197 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2198 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2199 return method->checked_exceptions_length();
2200 JVM_END
2201
2202
2203 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2204 JVMWrapper("JVM_GetMethodIxByteCode");
2205 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2206 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2207 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2208 memcpy(code, method->code_base(), method->code_size());
2209 JVM_END
2210
2211
2212 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2213 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2214 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2215 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2216 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2217 return method->code_size();
2218 JVM_END
2219
2220
2221 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2222 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2223 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2224 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2225 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2226 ExceptionTable extable(method);
2227 entry->start_pc = extable.start_pc(entry_index);
2228 entry->end_pc = extable.end_pc(entry_index);
2229 entry->handler_pc = extable.handler_pc(entry_index);
2230 entry->catchType = extable.catch_type_index(entry_index);
2231 JVM_END
2232
2233
2234 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2235 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2236 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2237 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2238 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2239 return method->exception_table_length();
2240 JVM_END
2241
2242
2243 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2244 JVMWrapper("JVM_GetMethodIxModifiers");
2245 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2246 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2247 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2248 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2249 JVM_END
2250
2251
2252 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2253 JVMWrapper("JVM_GetFieldIxModifiers");
2254 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2255 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2256 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2257 JVM_END
2258
2259
2260 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2261 JVMWrapper("JVM_GetMethodIxLocalsCount");
2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2265 return method->max_locals();
2266 JVM_END
2267
2268
2269 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2270 JVMWrapper("JVM_GetMethodIxArgsSize");
2271 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2272 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2273 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2274 return method->size_of_parameters();
2275 JVM_END
2276
2277
2278 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2279 JVMWrapper("JVM_GetMethodIxMaxStack");
2280 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2281 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2282 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2283 return method->verifier_max_stack();
2284 JVM_END
2285
2286
2287 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2288 JVMWrapper("JVM_IsConstructorIx");
2289 ResourceMark rm(THREAD);
2290 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2291 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2292 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2293 return method->name() == vmSymbols::object_initializer_name();
2294 JVM_END
2295
2296
2297 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2298 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2299 ResourceMark rm(THREAD);
2300 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2301 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2302 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2303 return method->is_overpass();
2304 JVM_END
2305
2306 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2307 JVMWrapper("JVM_GetMethodIxIxUTF");
2308 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2309 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2311 return method->name()->as_utf8();
2312 JVM_END
2313
2314
2315 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2316 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2317 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2318 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2319 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2320 return method->signature()->as_utf8();
2321 JVM_END
2322
2323 /**
2324 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2325 * read entries in the constant pool. Since the old verifier always
2326 * works on a copy of the code, it will not see any rewriting that
2327 * may possibly occur in the middle of verification. So it is important
2328 * that nothing it calls tries to use the cpCache instead of the raw
2329 * constant pool, so we must use cp->uncached_x methods when appropriate.
2330 */
2331 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2332 JVMWrapper("JVM_GetCPFieldNameUTF");
2333 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2335 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2336 switch (cp->tag_at(cp_index).value()) {
2337 case JVM_CONSTANT_Fieldref:
2338 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2339 default:
2340 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2341 }
2342 ShouldNotReachHere();
2343 return NULL;
2344 JVM_END
2345
2346
2347 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2348 JVMWrapper("JVM_GetCPMethodNameUTF");
2349 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2350 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2351 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2352 switch (cp->tag_at(cp_index).value()) {
2353 case JVM_CONSTANT_InterfaceMethodref:
2354 case JVM_CONSTANT_Methodref:
2355 case JVM_CONSTANT_NameAndType: // for invokedynamic
2356 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2357 default:
2358 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2359 }
2360 ShouldNotReachHere();
2361 return NULL;
2362 JVM_END
2363
2364
2365 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2366 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2367 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2370 switch (cp->tag_at(cp_index).value()) {
2371 case JVM_CONSTANT_InterfaceMethodref:
2372 case JVM_CONSTANT_Methodref:
2373 case JVM_CONSTANT_NameAndType: // for invokedynamic
2374 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2375 default:
2376 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2377 }
2378 ShouldNotReachHere();
2379 return NULL;
2380 JVM_END
2381
2382
2383 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2384 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2388 switch (cp->tag_at(cp_index).value()) {
2389 case JVM_CONSTANT_Fieldref:
2390 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2391 default:
2392 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2393 }
2394 ShouldNotReachHere();
2395 return NULL;
2396 JVM_END
2397
2398
2399 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2400 JVMWrapper("JVM_GetCPClassNameUTF");
2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2404 Symbol* classname = cp->klass_name_at(cp_index);
2405 return classname->as_utf8();
2406 JVM_END
2407
2408
2409 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2410 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2413 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2414 switch (cp->tag_at(cp_index).value()) {
2415 case JVM_CONSTANT_Fieldref: {
2416 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2417 Symbol* classname = cp->klass_name_at(class_index);
2418 return classname->as_utf8();
2419 }
2420 default:
2421 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2422 }
2423 ShouldNotReachHere();
2424 return NULL;
2425 JVM_END
2426
2427
2428 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2429 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2433 switch (cp->tag_at(cp_index).value()) {
2434 case JVM_CONSTANT_Methodref:
2435 case JVM_CONSTANT_InterfaceMethodref: {
2436 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2437 Symbol* classname = cp->klass_name_at(class_index);
2438 return classname->as_utf8();
2439 }
2440 default:
2441 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2442 }
2443 ShouldNotReachHere();
2444 return NULL;
2445 JVM_END
2446
2447
2448 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2449 JVMWrapper("JVM_GetCPFieldModifiers");
2450 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2451 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2452 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2453 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2454 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2455 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2456 switch (cp->tag_at(cp_index).value()) {
2457 case JVM_CONSTANT_Fieldref: {
2458 Symbol* name = cp->uncached_name_ref_at(cp_index);
2459 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2460 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2461 if (fs.name() == name && fs.signature() == signature) {
2462 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2463 }
2464 }
2465 return -1;
2466 }
2467 default:
2468 fatal("JVM_GetCPFieldModifiers: illegal constant");
2469 }
2470 ShouldNotReachHere();
2471 return 0;
2472 JVM_END
2473
2474
2475 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2476 JVMWrapper("JVM_GetCPMethodModifiers");
2477 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2478 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2480 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2481 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2482 switch (cp->tag_at(cp_index).value()) {
2483 case JVM_CONSTANT_Methodref:
2484 case JVM_CONSTANT_InterfaceMethodref: {
2485 Symbol* name = cp->uncached_name_ref_at(cp_index);
2486 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2487 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2488 int methods_count = methods->length();
2489 for (int i = 0; i < methods_count; i++) {
2490 Method* method = methods->at(i);
2491 if (method->name() == name && method->signature() == signature) {
2492 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2493 }
2494 }
2495 return -1;
2496 }
2497 default:
2498 fatal("JVM_GetCPMethodModifiers: illegal constant");
2499 }
2500 ShouldNotReachHere();
2501 return 0;
2502 JVM_END
2503
2504
2505 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2506
2507 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2508 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2509 JVM_END
2510
2511
2512 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2513 JVMWrapper("JVM_IsSameClassPackage");
2514 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2515 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2516 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2517 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2518 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2519 JVM_END
2520
2521
2522 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2523
2524 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2525 JVMWrapper2("JVM_Open (%s)", fname);
2526
2527 //%note jvm_r6
2528 int result = os::open(fname, flags, mode);
2529 if (result >= 0) {
2530 return result;
2531 } else {
2532 switch(errno) {
2533 case EEXIST:
2534 return JVM_EEXIST;
2535 default:
2536 return -1;
2537 }
2538 }
2539 JVM_END
2540
2541
2542 JVM_LEAF(jint, JVM_Close(jint fd))
2543 JVMWrapper2("JVM_Close (0x%x)", fd);
2544 //%note jvm_r6
2545 return os::close(fd);
2546 JVM_END
2547
2548
2549 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2550 JVMWrapper2("JVM_Read (0x%x)", fd);
2551
2552 //%note jvm_r6
2553 return (jint)os::restartable_read(fd, buf, nbytes);
2554 JVM_END
2555
2556
2557 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2558 JVMWrapper2("JVM_Write (0x%x)", fd);
2559
2560 //%note jvm_r6
2561 return (jint)os::write(fd, buf, nbytes);
2562 JVM_END
2563
2564
2565 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2566 JVMWrapper2("JVM_Available (0x%x)", fd);
2567 //%note jvm_r6
2568 return os::available(fd, pbytes);
2569 JVM_END
2570
2571
2572 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2573 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2574 //%note jvm_r6
2575 return os::lseek(fd, offset, whence);
2576 JVM_END
2577
2578
2579 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2580 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2581 return os::ftruncate(fd, length);
2582 JVM_END
2583
2584
2585 JVM_LEAF(jint, JVM_Sync(jint fd))
2586 JVMWrapper2("JVM_Sync (0x%x)", fd);
2587 //%note jvm_r6
2588 return os::fsync(fd);
2589 JVM_END
2590
2591
2592 // Printing support //////////////////////////////////////////////////
2593 extern "C" {
2594
2595 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2596 // see bug 4399518, 4417214
2597 if ((intptr_t)count <= 0) return -1;
2598 return vsnprintf(str, count, fmt, args);
2599 }
2600
2601
2602 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2603 va_list args;
2604 int len;
2605 va_start(args, fmt);
2606 len = jio_vsnprintf(str, count, fmt, args);
2607 va_end(args);
2608 return len;
2609 }
2610
2611
2612 int jio_fprintf(FILE* f, const char *fmt, ...) {
2613 int len;
2614 va_list args;
2615 va_start(args, fmt);
2616 len = jio_vfprintf(f, fmt, args);
2617 va_end(args);
2618 return len;
2619 }
2620
2621
2622 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2623 if (Arguments::vfprintf_hook() != NULL) {
2624 return Arguments::vfprintf_hook()(f, fmt, args);
2625 } else {
2626 return vfprintf(f, fmt, args);
2627 }
2628 }
2629
2630
2631 JNIEXPORT int jio_printf(const char *fmt, ...) {
2632 int len;
2633 va_list args;
2634 va_start(args, fmt);
2635 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2636 va_end(args);
2637 return len;
2638 }
2639
2640
2641 // HotSpot specific jio method
2642 void jio_print(const char* s) {
2643 // Try to make this function as atomic as possible.
2644 if (Arguments::vfprintf_hook() != NULL) {
2645 jio_fprintf(defaultStream::output_stream(), "%s", s);
2646 } else {
2647 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2648 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2649 }
2650 }
2651
2652 } // Extern C
2653
2654 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2655
2656 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2657 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2658 // OSThread objects. The exception to this rule is when the target object is the thread
2659 // doing the operation, in which case we know that the thread won't exit until the
2660 // operation is done (all exits being voluntary). There are a few cases where it is
2661 // rather silly to do operations on yourself, like resuming yourself or asking whether
2662 // you are alive. While these can still happen, they are not subject to deadlocks if
2663 // the lock is held while the operation occurs (this is not the case for suspend, for
2664 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2665 // implementation is local to this file, we always lock Threads_lock for that one.
2666
2667 static void thread_entry(JavaThread* thread, TRAPS) {
2668 HandleMark hm(THREAD);
2669 Handle obj(THREAD, thread->threadObj());
2670 JavaValue result(T_VOID);
2671 JavaCalls::call_virtual(&result,
2672 obj,
2673 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2674 vmSymbols::run_method_name(),
2675 vmSymbols::void_method_signature(),
2676 THREAD);
2677 }
2678
2679
2680 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2681 JVMWrapper("JVM_StartThread");
2682 JavaThread *native_thread = NULL;
2683
2684 // We cannot hold the Threads_lock when we throw an exception,
2685 // due to rank ordering issues. Example: we might need to grab the
2686 // Heap_lock while we construct the exception.
2687 bool throw_illegal_thread_state = false;
2688
2689 // We must release the Threads_lock before we can post a jvmti event
2690 // in Thread::start.
2691 {
2692 // Ensure that the C++ Thread and OSThread structures aren't freed before
2693 // we operate.
2694 MutexLocker mu(Threads_lock);
2695
2696 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2697 // re-starting an already started thread, so we should usually find
2698 // that the JavaThread is null. However for a JNI attached thread
2699 // there is a small window between the Thread object being created
2700 // (with its JavaThread set) and the update to its threadStatus, so we
2701 // have to check for this
2702 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2703 throw_illegal_thread_state = true;
2704 } else {
2705 // We could also check the stillborn flag to see if this thread was already stopped, but
2706 // for historical reasons we let the thread detect that itself when it starts running
2707
2708 jlong size =
2709 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2710 // Allocate the C++ Thread structure and create the native thread. The
2711 // stack size retrieved from java is signed, but the constructor takes
2712 // size_t (an unsigned type), so avoid passing negative values which would
2713 // result in really large stacks.
2714 size_t sz = size > 0 ? (size_t) size : 0;
2715 native_thread = new JavaThread(&thread_entry, sz);
2716
2717 // At this point it may be possible that no osthread was created for the
2718 // JavaThread due to lack of memory. Check for this situation and throw
2719 // an exception if necessary. Eventually we may want to change this so
2720 // that we only grab the lock if the thread was created successfully -
2721 // then we can also do this check and throw the exception in the
2722 // JavaThread constructor.
2723 if (native_thread->osthread() != NULL) {
2724 // Note: the current thread is not being used within "prepare".
2725 native_thread->prepare(jthread);
2726 }
2727 }
2728 }
2729
2730 if (throw_illegal_thread_state) {
2731 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2732 }
2733
2734 assert(native_thread != NULL, "Starting null thread?");
2735
2736 if (native_thread->osthread() == NULL) {
2737 // No one should hold a reference to the 'native_thread'.
2738 delete native_thread;
2739 if (JvmtiExport::should_post_resource_exhausted()) {
2740 JvmtiExport::post_resource_exhausted(
2741 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2742 "unable to create new native thread");
2743 }
2744 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2745 "unable to create new native thread");
2746 }
2747
2748 Thread::start(native_thread);
2749
2750 JVM_END
2751
2752 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2753 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2754 // but is thought to be reliable and simple. In the case, where the receiver is the
2755 // same thread as the sender, no safepoint is needed.
2756 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2757 JVMWrapper("JVM_StopThread");
2758
2759 oop java_throwable = JNIHandles::resolve(throwable);
2760 if (java_throwable == NULL) {
2761 THROW(vmSymbols::java_lang_NullPointerException());
2762 }
2763 oop java_thread = JNIHandles::resolve_non_null(jthread);
2764 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2765 Events::log_exception(JavaThread::current(),
2766 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2767 receiver, (address)java_thread, throwable);
2768 // First check if thread is alive
2769 if (receiver != NULL) {
2770 // Check if exception is getting thrown at self (use oop equality, since the
2771 // target object might exit)
2772 if (java_thread == thread->threadObj()) {
2773 THROW_OOP(java_throwable);
2774 } else {
2775 // Enques a VM_Operation to stop all threads and then deliver the exception...
2776 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2777 }
2778 }
2779 else {
2780 // Either:
2781 // - target thread has not been started before being stopped, or
2782 // - target thread already terminated
2783 // We could read the threadStatus to determine which case it is
2784 // but that is overkill as it doesn't matter. We must set the
2785 // stillborn flag for the first case, and if the thread has already
2786 // exited setting this flag has no affect
2787 java_lang_Thread::set_stillborn(java_thread);
2788 }
2789 JVM_END
2790
2791
2792 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2793 JVMWrapper("JVM_IsThreadAlive");
2794
2795 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2796 return java_lang_Thread::is_alive(thread_oop);
2797 JVM_END
2798
2799
2800 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2801 JVMWrapper("JVM_SuspendThread");
2802 oop java_thread = JNIHandles::resolve_non_null(jthread);
2803 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2804
2805 if (receiver != NULL) {
2806 // thread has run and has not exited (still on threads list)
2807
2808 {
2809 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2810 if (receiver->is_external_suspend()) {
2811 // Don't allow nested external suspend requests. We can't return
2812 // an error from this interface so just ignore the problem.
2813 return;
2814 }
2815 if (receiver->is_exiting()) { // thread is in the process of exiting
2816 return;
2817 }
2818 receiver->set_external_suspend();
2819 }
2820
2821 // java_suspend() will catch threads in the process of exiting
2822 // and will ignore them.
2823 receiver->java_suspend();
2824
2825 // It would be nice to have the following assertion in all the
2826 // time, but it is possible for a racing resume request to have
2827 // resumed this thread right after we suspended it. Temporarily
2828 // enable this assertion if you are chasing a different kind of
2829 // bug.
2830 //
2831 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2832 // receiver->is_being_ext_suspended(), "thread is not suspended");
2833 }
2834 JVM_END
2835
2836
2837 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2838 JVMWrapper("JVM_ResumeThread");
2839 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2840 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2841 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2842 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2843 // looks at it.
2844 MutexLocker ml(Threads_lock);
2845 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2846 if (thr != NULL) {
2847 // the thread has run and is not in the process of exiting
2848 thr->java_resume();
2849 }
2850 JVM_END
2851
2852
2853 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2854 JVMWrapper("JVM_SetThreadPriority");
2855 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2856 MutexLocker ml(Threads_lock);
2857 oop java_thread = JNIHandles::resolve_non_null(jthread);
2858 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2859 JavaThread* thr = java_lang_Thread::thread(java_thread);
2860 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2861 Thread::set_priority(thr, (ThreadPriority)prio);
2862 }
2863 JVM_END
2864
2865
2866 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2867 JVMWrapper("JVM_Yield");
2868 if (os::dont_yield()) return;
2869 #ifndef USDT2
2870 HS_DTRACE_PROBE0(hotspot, thread__yield);
2871 #else /* USDT2 */
2872 HOTSPOT_THREAD_YIELD();
2873 #endif /* USDT2 */
2874 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2875 // Critical for similar threading behaviour
2876 if (ConvertYieldToSleep) {
2877 os::sleep(thread, MinSleepInterval, false);
2878 } else {
2879 os::yield();
2880 }
2881 JVM_END
2882
2883
2884 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2885 JVMWrapper("JVM_Sleep");
2886
2887 if (millis < 0) {
2888 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2889 }
2890
2891 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2892 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2893 }
2894
2895 // Save current thread state and restore it at the end of this block.
2896 // And set new thread state to SLEEPING.
2897 JavaThreadSleepState jtss(thread);
2898
2899 #ifndef USDT2
2900 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2901 #else /* USDT2 */
2902 HOTSPOT_THREAD_SLEEP_BEGIN(
2903 millis);
2904 #endif /* USDT2 */
2905
2906 if (millis == 0) {
2907 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2908 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2909 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2910 // for SOLARIS
2911 if (ConvertSleepToYield) {
2912 os::yield();
2913 } else {
2914 ThreadState old_state = thread->osthread()->get_state();
2915 thread->osthread()->set_state(SLEEPING);
2916 os::sleep(thread, MinSleepInterval, false);
2917 thread->osthread()->set_state(old_state);
2918 }
2919 } else {
2920 ThreadState old_state = thread->osthread()->get_state();
2921 thread->osthread()->set_state(SLEEPING);
2922 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2923 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2924 // us while we were sleeping. We do not overwrite those.
2925 if (!HAS_PENDING_EXCEPTION) {
2926 #ifndef USDT2
2927 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2928 #else /* USDT2 */
2929 HOTSPOT_THREAD_SLEEP_END(
2930 1);
2931 #endif /* USDT2 */
2932 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2933 // to properly restore the thread state. That's likely wrong.
2934 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2935 }
2936 }
2937 thread->osthread()->set_state(old_state);
2938 }
2939 #ifndef USDT2
2940 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2941 #else /* USDT2 */
2942 HOTSPOT_THREAD_SLEEP_END(
2943 0);
2944 #endif /* USDT2 */
2945 JVM_END
2946
2947 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2948 JVMWrapper("JVM_CurrentThread");
2949 oop jthread = thread->threadObj();
2950 assert (thread != NULL, "no current thread!");
2951 return JNIHandles::make_local(env, jthread);
2952 JVM_END
2953
2954
2955 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2956 JVMWrapper("JVM_CountStackFrames");
2957
2958 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2959 oop java_thread = JNIHandles::resolve_non_null(jthread);
2960 bool throw_illegal_thread_state = false;
2961 int count = 0;
2962
2963 {
2964 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2965 // We need to re-resolve the java_thread, since a GC might have happened during the
2966 // acquire of the lock
2967 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2968
2969 if (thr == NULL) {
2970 // do nothing
2971 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2972 // Check whether this java thread has been suspended already. If not, throws
2973 // IllegalThreadStateException. We defer to throw that exception until
2974 // Threads_lock is released since loading exception class has to leave VM.
2975 // The correct way to test a thread is actually suspended is
2976 // wait_for_ext_suspend_completion(), but we can't call that while holding
2977 // the Threads_lock. The above tests are sufficient for our purposes
2978 // provided the walkability of the stack is stable - which it isn't
2979 // 100% but close enough for most practical purposes.
2980 throw_illegal_thread_state = true;
2981 } else {
2982 // Count all java activation, i.e., number of vframes
2983 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2984 // Native frames are not counted
2985 if (!vfst.method()->is_native()) count++;
2986 }
2987 }
2988 }
2989
2990 if (throw_illegal_thread_state) {
2991 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2992 "this thread is not suspended");
2993 }
2994 return count;
2995 JVM_END
2996
2997 // Consider: A better way to implement JVM_Interrupt() is to acquire
2998 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2999 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3000 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3001 // outside the critical section. Threads_lock is hot so we want to minimize
3002 // the hold-time. A cleaner interface would be to decompose interrupt into
3003 // two steps. The 1st phase, performed under Threads_lock, would return
3004 // a closure that'd be invoked after Threads_lock was dropped.
3005 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3006 // admit spurious wakeups.
3007
3008 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3009 JVMWrapper("JVM_Interrupt");
3010
3011 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3012 oop java_thread = JNIHandles::resolve_non_null(jthread);
3013 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3014 // We need to re-resolve the java_thread, since a GC might have happened during the
3015 // acquire of the lock
3016 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3017 if (thr != NULL) {
3018 Thread::interrupt(thr);
3019 }
3020 JVM_END
3021
3022
3023 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3024 JVMWrapper("JVM_IsInterrupted");
3025
3026 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3027 oop java_thread = JNIHandles::resolve_non_null(jthread);
3028 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3029 // We need to re-resolve the java_thread, since a GC might have happened during the
3030 // acquire of the lock
3031 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3032 if (thr == NULL) {
3033 return JNI_FALSE;
3034 } else {
3035 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3036 }
3037 JVM_END
3038
3039
3040 // Return true iff the current thread has locked the object passed in
3041
3042 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3043 JVMWrapper("JVM_HoldsLock");
3044 assert(THREAD->is_Java_thread(), "sanity check");
3045 if (obj == NULL) {
3046 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3047 }
3048 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3049 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3050 JVM_END
3051
3052
3053 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3054 JVMWrapper("JVM_DumpAllStacks");
3055 VM_PrintThreads op;
3056 VMThread::execute(&op);
3057 if (JvmtiExport::should_post_data_dump()) {
3058 JvmtiExport::post_data_dump();
3059 }
3060 JVM_END
3061
3062 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3063 JVMWrapper("JVM_SetNativeThreadName");
3064 ResourceMark rm(THREAD);
3065 oop java_thread = JNIHandles::resolve_non_null(jthread);
3066 JavaThread* thr = java_lang_Thread::thread(java_thread);
3067 // Thread naming only supported for the current thread, doesn't work for
3068 // target threads.
3069 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3070 // we don't set the name of an attached thread to avoid stepping
3071 // on other programs
3072 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3073 os::set_native_thread_name(thread_name);
3074 }
3075 JVM_END
3076
3077 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3078
3079 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3080 assert(jthread->is_Java_thread(), "must be a Java thread");
3081 if (jthread->privileged_stack_top() == NULL) return false;
3082 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3083 oop loader = jthread->privileged_stack_top()->class_loader();
3084 if (loader == NULL) return true;
3085 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3086 if (trusted) return true;
3087 }
3088 return false;
3089 }
3090
3091 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3092 JVMWrapper("JVM_CurrentLoadedClass");
3093 ResourceMark rm(THREAD);
3094
3095 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3096 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3097 bool trusted = is_trusted_frame(thread, &vfst);
3098 if (trusted) return NULL;
3099
3100 Method* m = vfst.method();
3101 if (!m->is_native()) {
3102 InstanceKlass* holder = m->method_holder();
3103 oop loader = holder->class_loader();
3104 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3105 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3106 }
3107 }
3108 }
3109 return NULL;
3110 JVM_END
3111
3112
3113 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3114 JVMWrapper("JVM_CurrentClassLoader");
3115 ResourceMark rm(THREAD);
3116
3117 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3118
3119 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3120 bool trusted = is_trusted_frame(thread, &vfst);
3121 if (trusted) return NULL;
3122
3123 Method* m = vfst.method();
3124 if (!m->is_native()) {
3125 InstanceKlass* holder = m->method_holder();
3126 assert(holder->is_klass(), "just checking");
3127 oop loader = holder->class_loader();
3128 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3129 return JNIHandles::make_local(env, loader);
3130 }
3131 }
3132 }
3133 return NULL;
3134 JVM_END
3135
3136
3137 // Utility object for collecting method holders walking down the stack
3138 class KlassLink: public ResourceObj {
3139 public:
3140 KlassHandle klass;
3141 KlassLink* next;
3142
3143 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3144 };
3145
3146
3147 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3148 JVMWrapper("JVM_GetClassContext");
3149 ResourceMark rm(THREAD);
3150 JvmtiVMObjectAllocEventCollector oam;
3151 // Collect linked list of (handles to) method holders
3152 KlassLink* first = NULL;
3153 KlassLink* last = NULL;
3154 int depth = 0;
3155
3156 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3157 // Native frames are not returned
3158 if (!vfst.method()->is_native()) {
3159 Klass* holder = vfst.method()->method_holder();
3160 assert(holder->is_klass(), "just checking");
3161 depth++;
3162 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3163 if (first == NULL) {
3164 first = last = l;
3165 } else {
3166 last->next = l;
3167 last = l;
3168 }
3169 }
3170 }
3171
3172 // Create result array of type [Ljava/lang/Class;
3173 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3174 // Fill in mirrors corresponding to method holders
3175 int index = 0;
3176 while (first != NULL) {
3177 result->obj_at_put(index++, first->klass()->java_mirror());
3178 first = first->next;
3179 }
3180 assert(index == depth, "just checking");
3181
3182 return (jobjectArray) JNIHandles::make_local(env, result);
3183 JVM_END
3184
3185
3186 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3187 JVMWrapper("JVM_ClassDepth");
3188 ResourceMark rm(THREAD);
3189 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3190 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3191
3192 const char* str = java_lang_String::as_utf8_string(class_name_str());
3193 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3194 if (class_name_sym == NULL) {
3195 return -1;
3196 }
3197
3198 int depth = 0;
3199
3200 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3201 if (!vfst.method()->is_native()) {
3202 InstanceKlass* holder = vfst.method()->method_holder();
3203 assert(holder->is_klass(), "just checking");
3204 if (holder->name() == class_name_sym) {
3205 return depth;
3206 }
3207 depth++;
3208 }
3209 }
3210 return -1;
3211 JVM_END
3212
3213
3214 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3215 JVMWrapper("JVM_ClassLoaderDepth");
3216 ResourceMark rm(THREAD);
3217 int depth = 0;
3218 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3219 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3220 bool trusted = is_trusted_frame(thread, &vfst);
3221 if (trusted) return -1;
3222
3223 Method* m = vfst.method();
3224 if (!m->is_native()) {
3225 InstanceKlass* holder = m->method_holder();
3226 assert(holder->is_klass(), "just checking");
3227 oop loader = holder->class_loader();
3228 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3229 return depth;
3230 }
3231 depth++;
3232 }
3233 }
3234 return -1;
3235 JVM_END
3236
3237
3238 // java.lang.Package ////////////////////////////////////////////////////////////////
3239
3240
3241 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3242 JVMWrapper("JVM_GetSystemPackage");
3243 ResourceMark rm(THREAD);
3244 JvmtiVMObjectAllocEventCollector oam;
3245 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3246 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3247 return (jstring) JNIHandles::make_local(result);
3248 JVM_END
3249
3250
3251 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3252 JVMWrapper("JVM_GetSystemPackages");
3253 JvmtiVMObjectAllocEventCollector oam;
3254 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3255 return (jobjectArray) JNIHandles::make_local(result);
3256 JVM_END
3257
3258
3259 // ObjectInputStream ///////////////////////////////////////////////////////////////
3260
3261 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3262 if (current_class == NULL) {
3263 return true;
3264 }
3265 if ((current_class == field_class) || access.is_public()) {
3266 return true;
3267 }
3268
3269 if (access.is_protected()) {
3270 // See if current_class is a subclass of field_class
3271 if (current_class->is_subclass_of(field_class)) {
3272 return true;
3273 }
3274 }
3275
3276 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3277 }
3278
3279
3280 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3281 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3282 JVMWrapper("JVM_AllocateNewObject");
3283 JvmtiVMObjectAllocEventCollector oam;
3284 // Receiver is not used
3285 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3286 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3287
3288 // Cannot instantiate primitive types
3289 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3290 ResourceMark rm(THREAD);
3291 THROW_0(vmSymbols::java_lang_InvalidClassException());
3292 }
3293
3294 // Arrays not allowed here, must use JVM_AllocateNewArray
3295 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3296 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3297 ResourceMark rm(THREAD);
3298 THROW_0(vmSymbols::java_lang_InvalidClassException());
3299 }
3300
3301 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3302 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3303
3304 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3305
3306 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3307 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3308
3309 // Make sure klass is initialized, since we are about to instantiate one of them.
3310 curr_klass->initialize(CHECK_NULL);
3311
3312 methodHandle m (THREAD,
3313 init_klass->find_method(vmSymbols::object_initializer_name(),
3314 vmSymbols::void_method_signature()));
3315 if (m.is_null()) {
3316 ResourceMark rm(THREAD);
3317 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3318 Method::name_and_sig_as_C_string(init_klass(),
3319 vmSymbols::object_initializer_name(),
3320 vmSymbols::void_method_signature()));
3321 }
3322
3323 if (curr_klass == init_klass && !m->is_public()) {
3324 // Calling the constructor for class 'curr_klass'.
3325 // Only allow calls to a public no-arg constructor.
3326 // This path corresponds to creating an Externalizable object.
3327 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3328 }
3329
3330 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3331 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3332 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3333 }
3334
3335 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3336 // Call constructor m. This might call a constructor higher up in the hierachy
3337 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3338
3339 return JNIHandles::make_local(obj());
3340 JVM_END
3341
3342
3343 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3344 JVMWrapper("JVM_AllocateNewArray");
3345 JvmtiVMObjectAllocEventCollector oam;
3346 oop mirror = JNIHandles::resolve_non_null(currClass);
3347
3348 if (java_lang_Class::is_primitive(mirror)) {
3349 THROW_0(vmSymbols::java_lang_InvalidClassException());
3350 }
3351 Klass* k = java_lang_Class::as_Klass(mirror);
3352 oop result;
3353
3354 if (k->oop_is_typeArray()) {
3355 // typeArray
3356 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3357 } else if (k->oop_is_objArray()) {
3358 // objArray
3359 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3360 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3361 result = oak->allocate(length, CHECK_NULL);
3362 } else {
3363 THROW_0(vmSymbols::java_lang_InvalidClassException());
3364 }
3365 return JNIHandles::make_local(env, result);
3366 JVM_END
3367
3368
3369 // Return the first non-null class loader up the execution stack, or null
3370 // if only code from the null class loader is on the stack.
3371
3372 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3373 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3374 // UseNewReflection
3375 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3376 oop loader = vfst.method()->method_holder()->class_loader();
3377 if (loader != NULL) {
3378 return JNIHandles::make_local(env, loader);
3379 }
3380 }
3381 return NULL;
3382 JVM_END
3383
3384
3385 // Load a class relative to the most recent class on the stack with a non-null
3386 // classloader.
3387 // This function has been deprecated and should not be considered part of the
3388 // specified JVM interface.
3389
3390 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3391 jclass currClass, jstring currClassName))
3392 JVMWrapper("JVM_LoadClass0");
3393 // Receiver is not used
3394 ResourceMark rm(THREAD);
3395
3396 // Class name argument is not guaranteed to be in internal format
3397 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3398 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3399
3400 const char* str = java_lang_String::as_utf8_string(string());
3401
3402 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3403 // It's impossible to create this class; the name cannot fit
3404 // into the constant pool.
3405 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3406 }
3407
3408 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3409 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3410 // Find the most recent class on the stack with a non-null classloader
3411 oop loader = NULL;
3412 oop protection_domain = NULL;
3413 if (curr_klass.is_null()) {
3414 for (vframeStream vfst(thread);
3415 !vfst.at_end() && loader == NULL;
3416 vfst.next()) {
3417 if (!vfst.method()->is_native()) {
3418 InstanceKlass* holder = vfst.method()->method_holder();
3419 loader = holder->class_loader();
3420 protection_domain = holder->protection_domain();
3421 }
3422 }
3423 } else {
3424 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3425 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3426 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3427 }
3428 Handle h_loader(THREAD, loader);
3429 Handle h_prot (THREAD, protection_domain);
3430 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3431 false, thread);
3432 if (TraceClassResolution && result != NULL) {
3433 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3434 }
3435 return result;
3436 JVM_END
3437
3438
3439 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3440
3441
3442 // resolve array handle and check arguments
3443 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3444 if (arr == NULL) {
3445 THROW_0(vmSymbols::java_lang_NullPointerException());
3446 }
3447 oop a = JNIHandles::resolve_non_null(arr);
3448 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3449 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3450 }
3451 return arrayOop(a);
3452 }
3453
3454
3455 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3456 JVMWrapper("JVM_GetArrayLength");
3457 arrayOop a = check_array(env, arr, false, CHECK_0);
3458 return a->length();
3459 JVM_END
3460
3461
3462 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3463 JVMWrapper("JVM_Array_Get");
3464 JvmtiVMObjectAllocEventCollector oam;
3465 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3466 jvalue value;
3467 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3468 oop box = Reflection::box(&value, type, CHECK_NULL);
3469 return JNIHandles::make_local(env, box);
3470 JVM_END
3471
3472
3473 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3474 JVMWrapper("JVM_GetPrimitiveArrayElement");
3475 jvalue value;
3476 value.i = 0; // to initialize value before getting used in CHECK
3477 arrayOop a = check_array(env, arr, true, CHECK_(value));
3478 assert(a->is_typeArray(), "just checking");
3479 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3480 BasicType wide_type = (BasicType) wCode;
3481 if (type != wide_type) {
3482 Reflection::widen(&value, type, wide_type, CHECK_(value));
3483 }
3484 return value;
3485 JVM_END
3486
3487
3488 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3489 JVMWrapper("JVM_SetArrayElement");
3490 arrayOop a = check_array(env, arr, false, CHECK);
3491 oop box = JNIHandles::resolve(val);
3492 jvalue value;
3493 value.i = 0; // to initialize value before getting used in CHECK
3494 BasicType value_type;
3495 if (a->is_objArray()) {
3496 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3497 value_type = Reflection::unbox_for_regular_object(box, &value);
3498 } else {
3499 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3500 }
3501 Reflection::array_set(&value, a, index, value_type, CHECK);
3502 JVM_END
3503
3504
3505 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3506 JVMWrapper("JVM_SetPrimitiveArrayElement");
3507 arrayOop a = check_array(env, arr, true, CHECK);
3508 assert(a->is_typeArray(), "just checking");
3509 BasicType value_type = (BasicType) vCode;
3510 Reflection::array_set(&v, a, index, value_type, CHECK);
3511 JVM_END
3512
3513
3514 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3515 JVMWrapper("JVM_NewArray");
3516 JvmtiVMObjectAllocEventCollector oam;
3517 oop element_mirror = JNIHandles::resolve(eltClass);
3518 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3519 return JNIHandles::make_local(env, result);
3520 JVM_END
3521
3522
3523 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3524 JVMWrapper("JVM_NewMultiArray");
3525 JvmtiVMObjectAllocEventCollector oam;
3526 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3527 oop element_mirror = JNIHandles::resolve(eltClass);
3528 assert(dim_array->is_typeArray(), "just checking");
3529 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3530 return JNIHandles::make_local(env, result);
3531 JVM_END
3532
3533
3534 // Networking library support ////////////////////////////////////////////////////////////////////
3535
3536 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3537 JVMWrapper("JVM_InitializeSocketLibrary");
3538 return 0;
3539 JVM_END
3540
3541
3542 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3543 JVMWrapper("JVM_Socket");
3544 return os::socket(domain, type, protocol);
3545 JVM_END
3546
3547
3548 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3549 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3550 //%note jvm_r6
3551 return os::socket_close(fd);
3552 JVM_END
3553
3554
3555 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3556 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3557 //%note jvm_r6
3558 return os::socket_shutdown(fd, howto);
3559 JVM_END
3560
3561
3562 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3563 JVMWrapper2("JVM_Recv (0x%x)", fd);
3564 //%note jvm_r6
3565 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3566 JVM_END
3567
3568
3569 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3570 JVMWrapper2("JVM_Send (0x%x)", fd);
3571 //%note jvm_r6
3572 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3573 JVM_END
3574
3575
3576 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3577 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3578 //%note jvm_r6
3579 return os::timeout(fd, timeout);
3580 JVM_END
3581
3582
3583 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3584 JVMWrapper2("JVM_Listen (0x%x)", fd);
3585 //%note jvm_r6
3586 return os::listen(fd, count);
3587 JVM_END
3588
3589
3590 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3591 JVMWrapper2("JVM_Connect (0x%x)", fd);
3592 //%note jvm_r6
3593 return os::connect(fd, him, (socklen_t)len);
3594 JVM_END
3595
3596
3597 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3598 JVMWrapper2("JVM_Bind (0x%x)", fd);
3599 //%note jvm_r6
3600 return os::bind(fd, him, (socklen_t)len);
3601 JVM_END
3602
3603
3604 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3605 JVMWrapper2("JVM_Accept (0x%x)", fd);
3606 //%note jvm_r6
3607 socklen_t socklen = (socklen_t)(*len);
3608 jint result = os::accept(fd, him, &socklen);
3609 *len = (jint)socklen;
3610 return result;
3611 JVM_END
3612
3613
3614 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3615 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3616 //%note jvm_r6
3617 socklen_t socklen = (socklen_t)(*fromlen);
3618 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3619 *fromlen = (int)socklen;
3620 return result;
3621 JVM_END
3622
3623
3624 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3625 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3626 //%note jvm_r6
3627 socklen_t socklen = (socklen_t)(*len);
3628 jint result = os::get_sock_name(fd, him, &socklen);
3629 *len = (int)socklen;
3630 return result;
3631 JVM_END
3632
3633
3634 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3635 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3636 //%note jvm_r6
3637 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3638 JVM_END
3639
3640
3641 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3642 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3643 //%note jvm_r6
3644 return os::socket_available(fd, pbytes);
3645 JVM_END
3646
3647
3648 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3649 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3650 //%note jvm_r6
3651 socklen_t socklen = (socklen_t)(*optlen);
3652 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3653 *optlen = (int)socklen;
3654 return result;
3655 JVM_END
3656
3657
3658 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3659 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3660 //%note jvm_r6
3661 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3662 JVM_END
3663
3664
3665 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3666 JVMWrapper("JVM_GetHostName");
3667 return os::get_host_name(name, namelen);
3668 JVM_END
3669
3670
3671 // Library support ///////////////////////////////////////////////////////////////////////////
3672
3673 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3674 //%note jvm_ct
3675 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3676 char ebuf[1024];
3677 void *load_result;
3678 {
3679 ThreadToNativeFromVM ttnfvm(thread);
3680 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3681 }
3682 if (load_result == NULL) {
3683 char msg[1024];
3684 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3685 // Since 'ebuf' may contain a string encoded using
3686 // platform encoding scheme, we need to pass
3687 // Exceptions::unsafe_to_utf8 to the new_exception method
3688 // as the last argument. See bug 6367357.
3689 Handle h_exception =
3690 Exceptions::new_exception(thread,
3691 vmSymbols::java_lang_UnsatisfiedLinkError(),
3692 msg, Exceptions::unsafe_to_utf8);
3693
3694 THROW_HANDLE_0(h_exception);
3695 }
3696 return load_result;
3697 JVM_END
3698
3699
3700 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3701 JVMWrapper("JVM_UnloadLibrary");
3702 os::dll_unload(handle);
3703 JVM_END
3704
3705
3706 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3707 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3708 return os::dll_lookup(handle, name);
3709 JVM_END
3710
3711
3712 // Floating point support ////////////////////////////////////////////////////////////////////
3713
3714 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3715 JVMWrapper("JVM_IsNaN");
3716 return g_isnan(a);
3717 JVM_END
3718
3719
3720 // JNI version ///////////////////////////////////////////////////////////////////////////////
3721
3722 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3723 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3724 return Threads::is_supported_jni_version_including_1_1(version);
3725 JVM_END
3726
3727
3728 // String support ///////////////////////////////////////////////////////////////////////////
3729
3730 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3731 JVMWrapper("JVM_InternString");
3732 JvmtiVMObjectAllocEventCollector oam;
3733 if (str == NULL) return NULL;
3734 oop string = JNIHandles::resolve_non_null(str);
3735 oop result = StringTable::intern(string, CHECK_NULL);
3736 return (jstring) JNIHandles::make_local(env, result);
3737 JVM_END
3738
3739
3740 // Raw monitor support //////////////////////////////////////////////////////////////////////
3741
3742 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3743 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3744 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3745 // that only works with java threads.
3746
3747
3748 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3749 VM_Exit::block_if_vm_exited();
3750 JVMWrapper("JVM_RawMonitorCreate");
3751 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3752 }
3753
3754
3755 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3756 VM_Exit::block_if_vm_exited();
3757 JVMWrapper("JVM_RawMonitorDestroy");
3758 delete ((Mutex*) mon);
3759 }
3760
3761
3762 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3763 VM_Exit::block_if_vm_exited();
3764 JVMWrapper("JVM_RawMonitorEnter");
3765 ((Mutex*) mon)->jvm_raw_lock();
3766 return 0;
3767 }
3768
3769
3770 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3771 VM_Exit::block_if_vm_exited();
3772 JVMWrapper("JVM_RawMonitorExit");
3773 ((Mutex*) mon)->jvm_raw_unlock();
3774 }
3775
3776
3777 // Support for Serialization
3778
3779 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3780 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3781 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3782 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3783
3784 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3785 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3786 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3787 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3788
3789
3790 void initialize_converter_functions() {
3791 if (JDK_Version::is_gte_jdk14x_version()) {
3792 // These functions only exist for compatibility with 1.3.1 and earlier
3793 return;
3794 }
3795
3796 // called from universe_post_init()
3797 assert(
3798 int_bits_to_float_fn == NULL &&
3799 long_bits_to_double_fn == NULL &&
3800 float_to_int_bits_fn == NULL &&
3801 double_to_long_bits_fn == NULL ,
3802 "initialization done twice"
3803 );
3804 // initialize
3805 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3806 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3807 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3808 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3809 // verify
3810 assert(
3811 int_bits_to_float_fn != NULL &&
3812 long_bits_to_double_fn != NULL &&
3813 float_to_int_bits_fn != NULL &&
3814 double_to_long_bits_fn != NULL ,
3815 "initialization failed"
3816 );
3817 }
3818
3819
3820 // Serialization
3821 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3822 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3823 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3824
3825 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3826 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3827 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3828 oop o = JNIHandles::resolve(obj);
3829
3830 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3831 THROW(vmSymbols::java_lang_NullPointerException());
3832 }
3833
3834 jsize nfids = fids->length();
3835 if (nfids == 0) return;
3836
3837 if (tcodes->length() < nfids) {
3838 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3839 }
3840
3841 jsize off = 0;
3842 /* loop through fields, setting values */
3843 for (jsize i = 0; i < nfids; i++) {
3844 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3845 int field_offset;
3846 if (fid != NULL) {
3847 // NULL is a legal value for fid, but retrieving the field offset
3848 // trigger assertion in that case
3849 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3850 }
3851
3852 switch (tcodes->char_at(i)) {
3853 case 'Z':
3854 if (fid != NULL) {
3855 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3856 o->bool_field_put(field_offset, val);
3857 }
3858 off++;
3859 break;
3860
3861 case 'B':
3862 if (fid != NULL) {
3863 o->byte_field_put(field_offset, dbuf->byte_at(off));
3864 }
3865 off++;
3866 break;
3867
3868 case 'C':
3869 if (fid != NULL) {
3870 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3871 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3872 o->char_field_put(field_offset, val);
3873 }
3874 off += 2;
3875 break;
3876
3877 case 'S':
3878 if (fid != NULL) {
3879 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3880 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3881 o->short_field_put(field_offset, val);
3882 }
3883 off += 2;
3884 break;
3885
3886 case 'I':
3887 if (fid != NULL) {
3888 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3889 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3890 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3891 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3892 o->int_field_put(field_offset, ival);
3893 }
3894 off += 4;
3895 break;
3896
3897 case 'F':
3898 if (fid != NULL) {
3899 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3900 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3901 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3902 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3903 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3904 o->float_field_put(field_offset, fval);
3905 }
3906 off += 4;
3907 break;
3908
3909 case 'J':
3910 if (fid != NULL) {
3911 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3912 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3913 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3914 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3915 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3916 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3917 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3918 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3919 o->long_field_put(field_offset, lval);
3920 }
3921 off += 8;
3922 break;
3923
3924 case 'D':
3925 if (fid != NULL) {
3926 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3927 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3928 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3929 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3930 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3931 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3932 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3933 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3934 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3935 o->double_field_put(field_offset, dval);
3936 }
3937 off += 8;
3938 break;
3939
3940 default:
3941 // Illegal typecode
3942 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3943 }
3944 }
3945 JVM_END
3946
3947
3948 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3949 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3950 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3951
3952 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3953 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3954 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3955 oop o = JNIHandles::resolve(obj);
3956
3957 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3958 THROW(vmSymbols::java_lang_NullPointerException());
3959 }
3960
3961 jsize nfids = fids->length();
3962 if (nfids == 0) return;
3963
3964 if (tcodes->length() < nfids) {
3965 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3966 }
3967
3968 /* loop through fields, fetching values */
3969 jsize off = 0;
3970 for (jsize i = 0; i < nfids; i++) {
3971 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3972 if (fid == NULL) {
3973 THROW(vmSymbols::java_lang_NullPointerException());
3974 }
3975 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3976
3977 switch (tcodes->char_at(i)) {
3978 case 'Z':
3979 {
3980 jboolean val = o->bool_field(field_offset);
3981 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3982 }
3983 break;
3984
3985 case 'B':
3986 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3987 break;
3988
3989 case 'C':
3990 {
3991 jchar val = o->char_field(field_offset);
3992 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3993 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3994 }
3995 break;
3996
3997 case 'S':
3998 {
3999 jshort val = o->short_field(field_offset);
4000 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4001 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4002 }
4003 break;
4004
4005 case 'I':
4006 {
4007 jint val = o->int_field(field_offset);
4008 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4009 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4010 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4011 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4012 }
4013 break;
4014
4015 case 'F':
4016 {
4017 jfloat fval = o->float_field(field_offset);
4018 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4019 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4020 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4021 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4022 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4023 }
4024 break;
4025
4026 case 'J':
4027 {
4028 jlong val = o->long_field(field_offset);
4029 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4030 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4031 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4032 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4033 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4034 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4035 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4036 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4037 }
4038 break;
4039
4040 case 'D':
4041 {
4042 jdouble dval = o->double_field(field_offset);
4043 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4044 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4045 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4046 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4047 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4048 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4049 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4050 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4051 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4052 }
4053 break;
4054
4055 default:
4056 // Illegal typecode
4057 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4058 }
4059 }
4060 JVM_END
4061
4062
4063 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4064
4065 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4066 // Security Note:
4067 // The Java level wrapper will perform the necessary security check allowing
4068 // us to pass the NULL as the initiating class loader.
4069 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4070
4071 KlassHandle klass_handle(THREAD, klass);
4072 // Check if we should initialize the class
4073 if (init && klass_handle->oop_is_instance()) {
4074 klass_handle->initialize(CHECK_NULL);
4075 }
4076 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4077 }
4078
4079
4080 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4081
4082 #ifndef PRODUCT
4083
4084 extern "C" {
4085 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4086 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4087 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4088 }
4089
4090 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4091 JVMWrapper("JVM_AccessBoolVMFlag");
4092 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4093 JVM_END
4094
4095 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4096 JVMWrapper("JVM_AccessVMIntFlag");
4097 intx v;
4098 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4099 *value = (jint)v;
4100 return result;
4101 JVM_END
4102
4103
4104 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4105 JVMWrapper("JVM_VMBreakPoint");
4106 oop the_obj = JNIHandles::resolve(obj);
4107 BREAKPOINT;
4108 JVM_END
4109
4110
4111 #endif
4112
4113
4114 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4115
4116 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4117 JVMWrapper("JVM_InvokeMethod");
4118 Handle method_handle;
4119 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4120 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4121 Handle receiver(THREAD, JNIHandles::resolve(obj));
4122 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4123 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4124 jobject res = JNIHandles::make_local(env, result);
4125 if (JvmtiExport::should_post_vm_object_alloc()) {
4126 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4127 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4128 if (java_lang_Class::is_primitive(ret_type)) {
4129 // Only for primitive type vm allocates memory for java object.
4130 // See box() method.
4131 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4132 }
4133 }
4134 return res;
4135 } else {
4136 THROW_0(vmSymbols::java_lang_StackOverflowError());
4137 }
4138 JVM_END
4139
4140
4141 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4142 JVMWrapper("JVM_NewInstanceFromConstructor");
4143 oop constructor_mirror = JNIHandles::resolve(c);
4144 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4145 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4146 jobject res = JNIHandles::make_local(env, result);
4147 if (JvmtiExport::should_post_vm_object_alloc()) {
4148 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4149 }
4150 return res;
4151 JVM_END
4152
4153 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4154
4155 JVM_LEAF(jboolean, JVM_SupportsCX8())
4156 JVMWrapper("JVM_SupportsCX8");
4157 return VM_Version::supports_cx8();
4158 JVM_END
4159
4160
4161 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4162 JVMWrapper("JVM_CX8Field");
4163 jlong res;
4164 oop o = JNIHandles::resolve(obj);
4165 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4166 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4167
4168 assert(VM_Version::supports_cx8(), "cx8 not supported");
4169 res = Atomic::cmpxchg(newVal, addr, oldVal);
4170
4171 return res == oldVal;
4172 JVM_END
4173
4174 // DTrace ///////////////////////////////////////////////////////////////////
4175
4176 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4177 JVMWrapper("JVM_DTraceGetVersion");
4178 return (jint)JVM_TRACING_DTRACE_VERSION;
4179 JVM_END
4180
4181 JVM_ENTRY(jlong,JVM_DTraceActivate(
4182 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4183 JVM_DTraceProvider* providers))
4184 JVMWrapper("JVM_DTraceActivate");
4185 return DTraceJSDT::activate(
4186 version, module_name, providers_count, providers, CHECK_0);
4187 JVM_END
4188
4189 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4190 JVMWrapper("JVM_DTraceIsProbeEnabled");
4191 return DTraceJSDT::is_probe_enabled(method);
4192 JVM_END
4193
4194 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4195 JVMWrapper("JVM_DTraceDispose");
4196 DTraceJSDT::dispose(handle);
4197 JVM_END
4198
4199 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4200 JVMWrapper("JVM_DTraceIsSupported");
4201 return DTraceJSDT::is_supported();
4202 JVM_END
4203
4204 // Returns an array of all live Thread objects (VM internal JavaThreads,
4205 // jvmti agent threads, and JNI attaching threads are skipped)
4206 // See CR 6404306 regarding JNI attaching threads
4207 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4208 ResourceMark rm(THREAD);
4209 ThreadsListEnumerator tle(THREAD, false, false);
4210 JvmtiVMObjectAllocEventCollector oam;
4211
4212 int num_threads = tle.num_threads();
4213 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4214 objArrayHandle threads_ah(THREAD, r);
4215
4216 for (int i = 0; i < num_threads; i++) {
4217 Handle h = tle.get_threadObj(i);
4218 threads_ah->obj_at_put(i, h());
4219 }
4220
4221 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4222 JVM_END
4223
4224
4225 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4226 // Return StackTraceElement[][], each element is the stack trace of a thread in
4227 // the corresponding entry in the given threads array
4228 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4229 JVMWrapper("JVM_DumpThreads");
4230 JvmtiVMObjectAllocEventCollector oam;
4231
4232 // Check if threads is null
4233 if (threads == NULL) {
4234 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4235 }
4236
4237 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4238 objArrayHandle ah(THREAD, a);
4239 int num_threads = ah->length();
4240 // check if threads is non-empty array
4241 if (num_threads == 0) {
4242 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4243 }
4244
4245 // check if threads is not an array of objects of Thread class
4246 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4247 if (k != SystemDictionary::Thread_klass()) {
4248 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4249 }
4250
4251 ResourceMark rm(THREAD);
4252
4253 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4254 for (int i = 0; i < num_threads; i++) {
4255 oop thread_obj = ah->obj_at(i);
4256 instanceHandle h(THREAD, (instanceOop) thread_obj);
4257 thread_handle_array->append(h);
4258 }
4259
4260 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4261 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4262
4263 JVM_END
4264
4265 // JVM monitoring and management support
4266 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4267 return Management::get_jmm_interface(version);
4268 JVM_END
4269
4270 // com.sun.tools.attach.VirtualMachine agent properties support
4271 //
4272 // Initialize the agent properties with the properties maintained in the VM
4273 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4274 JVMWrapper("JVM_InitAgentProperties");
4275 ResourceMark rm;
4276
4277 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4278
4279 PUTPROP(props, "sun.java.command", Arguments::java_command());
4280 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4281 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4282 return properties;
4283 JVM_END
4284
4285 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4286 {
4287 JVMWrapper("JVM_GetEnclosingMethodInfo");
4288 JvmtiVMObjectAllocEventCollector oam;
4289
4290 if (ofClass == NULL) {
4291 return NULL;
4292 }
4293 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4294 // Special handling for primitive objects
4295 if (java_lang_Class::is_primitive(mirror())) {
4296 return NULL;
4297 }
4298 Klass* k = java_lang_Class::as_Klass(mirror());
4299 if (!k->oop_is_instance()) {
4300 return NULL;
4301 }
4302 instanceKlassHandle ik_h(THREAD, k);
4303 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4304 if (encl_method_class_idx == 0) {
4305 return NULL;
4306 }
4307 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4308 objArrayHandle dest(THREAD, dest_o);
4309 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4310 dest->obj_at_put(0, enc_k->java_mirror());
4311 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4312 if (encl_method_method_idx != 0) {
4313 Symbol* sym = ik_h->constants()->symbol_at(
4314 extract_low_short_from_int(
4315 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4316 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4317 dest->obj_at_put(1, str());
4318 sym = ik_h->constants()->symbol_at(
4319 extract_high_short_from_int(
4320 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4321 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4322 dest->obj_at_put(2, str());
4323 }
4324 return (jobjectArray) JNIHandles::make_local(dest());
4325 }
4326 JVM_END
4327
4328 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4329 jint javaThreadState))
4330 {
4331 // If new thread states are added in future JDK and VM versions,
4332 // this should check if the JDK version is compatible with thread
4333 // states supported by the VM. Return NULL if not compatible.
4334 //
4335 // This function must map the VM java_lang_Thread::ThreadStatus
4336 // to the Java thread state that the JDK supports.
4337 //
4338
4339 typeArrayHandle values_h;
4340 switch (javaThreadState) {
4341 case JAVA_THREAD_STATE_NEW : {
4342 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4343 values_h = typeArrayHandle(THREAD, r);
4344 values_h->int_at_put(0, java_lang_Thread::NEW);
4345 break;
4346 }
4347 case JAVA_THREAD_STATE_RUNNABLE : {
4348 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4349 values_h = typeArrayHandle(THREAD, r);
4350 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4351 break;
4352 }
4353 case JAVA_THREAD_STATE_BLOCKED : {
4354 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4355 values_h = typeArrayHandle(THREAD, r);
4356 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4357 break;
4358 }
4359 case JAVA_THREAD_STATE_WAITING : {
4360 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4361 values_h = typeArrayHandle(THREAD, r);
4362 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4363 values_h->int_at_put(1, java_lang_Thread::PARKED);
4364 break;
4365 }
4366 case JAVA_THREAD_STATE_TIMED_WAITING : {
4367 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4368 values_h = typeArrayHandle(THREAD, r);
4369 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4370 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4371 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4372 break;
4373 }
4374 case JAVA_THREAD_STATE_TERMINATED : {
4375 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4376 values_h = typeArrayHandle(THREAD, r);
4377 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4378 break;
4379 }
4380 default:
4381 // Unknown state - probably incompatible JDK version
4382 return NULL;
4383 }
4384
4385 return (jintArray) JNIHandles::make_local(env, values_h());
4386 }
4387 JVM_END
4388
4389
4390 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4391 jint javaThreadState,
4392 jintArray values))
4393 {
4394 // If new thread states are added in future JDK and VM versions,
4395 // this should check if the JDK version is compatible with thread
4396 // states supported by the VM. Return NULL if not compatible.
4397 //
4398 // This function must map the VM java_lang_Thread::ThreadStatus
4399 // to the Java thread state that the JDK supports.
4400 //
4401
4402 ResourceMark rm;
4403
4404 // Check if threads is null
4405 if (values == NULL) {
4406 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4407 }
4408
4409 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4410 typeArrayHandle values_h(THREAD, v);
4411
4412 objArrayHandle names_h;
4413 switch (javaThreadState) {
4414 case JAVA_THREAD_STATE_NEW : {
4415 assert(values_h->length() == 1 &&
4416 values_h->int_at(0) == java_lang_Thread::NEW,
4417 "Invalid threadStatus value");
4418
4419 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4420 1, /* only 1 substate */
4421 CHECK_NULL);
4422 names_h = objArrayHandle(THREAD, r);
4423 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4424 names_h->obj_at_put(0, name());
4425 break;
4426 }
4427 case JAVA_THREAD_STATE_RUNNABLE : {
4428 assert(values_h->length() == 1 &&
4429 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4430 "Invalid threadStatus value");
4431
4432 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4433 1, /* only 1 substate */
4434 CHECK_NULL);
4435 names_h = objArrayHandle(THREAD, r);
4436 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4437 names_h->obj_at_put(0, name());
4438 break;
4439 }
4440 case JAVA_THREAD_STATE_BLOCKED : {
4441 assert(values_h->length() == 1 &&
4442 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4443 "Invalid threadStatus value");
4444
4445 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4446 1, /* only 1 substate */
4447 CHECK_NULL);
4448 names_h = objArrayHandle(THREAD, r);
4449 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4450 names_h->obj_at_put(0, name());
4451 break;
4452 }
4453 case JAVA_THREAD_STATE_WAITING : {
4454 assert(values_h->length() == 2 &&
4455 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4456 values_h->int_at(1) == java_lang_Thread::PARKED,
4457 "Invalid threadStatus value");
4458 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4459 2, /* number of substates */
4460 CHECK_NULL);
4461 names_h = objArrayHandle(THREAD, r);
4462 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4463 CHECK_NULL);
4464 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4465 CHECK_NULL);
4466 names_h->obj_at_put(0, name0());
4467 names_h->obj_at_put(1, name1());
4468 break;
4469 }
4470 case JAVA_THREAD_STATE_TIMED_WAITING : {
4471 assert(values_h->length() == 3 &&
4472 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4473 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4474 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4475 "Invalid threadStatus value");
4476 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4477 3, /* number of substates */
4478 CHECK_NULL);
4479 names_h = objArrayHandle(THREAD, r);
4480 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4481 CHECK_NULL);
4482 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4483 CHECK_NULL);
4484 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4485 CHECK_NULL);
4486 names_h->obj_at_put(0, name0());
4487 names_h->obj_at_put(1, name1());
4488 names_h->obj_at_put(2, name2());
4489 break;
4490 }
4491 case JAVA_THREAD_STATE_TERMINATED : {
4492 assert(values_h->length() == 1 &&
4493 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4494 "Invalid threadStatus value");
4495 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4496 1, /* only 1 substate */
4497 CHECK_NULL);
4498 names_h = objArrayHandle(THREAD, r);
4499 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4500 names_h->obj_at_put(0, name());
4501 break;
4502 }
4503 default:
4504 // Unknown state - probably incompatible JDK version
4505 return NULL;
4506 }
4507 return (jobjectArray) JNIHandles::make_local(env, names_h());
4508 }
4509 JVM_END
4510
4511 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4512 {
4513 memset(info, 0, sizeof(info_size));
4514
4515 info->jvm_version = Abstract_VM_Version::jvm_version();
4516 info->update_version = 0; /* 0 in HotSpot Express VM */
4517 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4518
4519 // when we add a new capability in the jvm_version_info struct, we should also
4520 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4521 // counter defined in runtimeService.cpp.
4522 info->is_attachable = AttachListener::is_attach_supported();
4523 #ifdef KERNEL
4524 info->is_kernel_jvm = 1; // true;
4525 #else // KERNEL
4526 info->is_kernel_jvm = 0; // false;
4527 #endif // KERNEL
4528 }
4529 JVM_END