1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "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(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
488 JVMWrapper("JVM_GetStackTraceDepth");
489 oop exception = JNIHandles::resolve(throwable);
490 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
491 JVM_END
492
493
494 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
495 JVMWrapper("JVM_GetStackTraceElement");
496 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
497 oop exception = JNIHandles::resolve(throwable);
498 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
499 return JNIHandles::make_local(env, element);
500 JVM_END
501
502
503 // java.lang.Object ///////////////////////////////////////////////
504
505
506 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
507 JVMWrapper("JVM_IHashCode");
508 // as implemented in the classic virtual machine; return 0 if object is NULL
509 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
510 JVM_END
511
512
513 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
514 JVMWrapper("JVM_MonitorWait");
515 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
516 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
517 if (JvmtiExport::should_post_monitor_wait()) {
518 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
519 }
520 ObjectSynchronizer::wait(obj, ms, CHECK);
521 JVM_END
522
523
524 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
525 JVMWrapper("JVM_MonitorNotify");
526 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
527 ObjectSynchronizer::notify(obj, CHECK);
528 JVM_END
529
530
531 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
532 JVMWrapper("JVM_MonitorNotifyAll");
533 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
534 ObjectSynchronizer::notifyall(obj, CHECK);
535 JVM_END
536
537
538 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
539 JVMWrapper("JVM_Clone");
540 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
541 const KlassHandle klass (THREAD, obj->klass());
542 JvmtiVMObjectAllocEventCollector oam;
543
544 #ifdef ASSERT
545 // Just checking that the cloneable flag is set correct
546 if (obj->is_array()) {
547 guarantee(klass->is_cloneable(), "all arrays are cloneable");
548 } else {
549 guarantee(obj->is_instance(), "should be instanceOop");
550 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
551 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
552 }
553 #endif
554
555 // Check if class of obj supports the Cloneable interface.
556 // All arrays are considered to be cloneable (See JLS 20.1.5)
557 if (!klass->is_cloneable()) {
558 ResourceMark rm(THREAD);
559 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
560 }
561
562 // Make shallow object copy
563 const int size = obj->size();
564 oop new_obj = NULL;
565 if (obj->is_array()) {
566 const int length = ((arrayOop)obj())->length();
567 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
568 } else {
569 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
570 }
571 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
572 // is modifying a reference field in the clonee, a non-oop-atomic copy might
573 // be suspended in the middle of copying the pointer and end up with parts
574 // of two different pointers in the field. Subsequent dereferences will crash.
575 // 4846409: an oop-copy of objects with long or double fields or arrays of same
576 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
577 // of oops. We know objects are aligned on a minimum of an jlong boundary.
578 // The same is true of StubRoutines::object_copy and the various oop_copy
579 // variants, and of the code generated by the inline_native_clone intrinsic.
580 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
581 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
582 (size_t)align_object_size(size) / HeapWordsPerLong);
583 // Clear the header
584 new_obj->init_mark();
585
586 // Store check (mark entire object and let gc sort it out)
587 BarrierSet* bs = Universe::heap()->barrier_set();
588 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
589 bs->write_region(MemRegion((HeapWord*)new_obj, size));
590
591 // Caution: this involves a java upcall, so the clone should be
592 // "gc-robust" by this stage.
593 if (klass->has_finalizer()) {
594 assert(obj->is_instance(), "should be instanceOop");
595 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
596 }
597
598 return JNIHandles::make_local(env, oop(new_obj));
599 JVM_END
600
601 // java.lang.Compiler ////////////////////////////////////////////////////
602
603 // The initial cuts of the HotSpot VM will not support JITs, and all existing
604 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
605 // functions are all silently ignored unless JVM warnings are printed.
606
607 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
608 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
609 JVM_END
610
611
612 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
613 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
614 return JNI_FALSE;
615 JVM_END
616
617
618 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
619 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
620 return JNI_FALSE;
621 JVM_END
622
623
624 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
625 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
626 return JNI_FALSE;
627 JVM_END
628
629
630 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
631 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
632 return NULL;
633 JVM_END
634
635
636 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
637 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
638 JVM_END
639
640
641 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
642 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
643 JVM_END
644
645
646
647 // Error message support //////////////////////////////////////////////////////
648
649 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
650 JVMWrapper("JVM_GetLastErrorString");
651 return (jint)os::lasterror(buf, len);
652 JVM_END
653
654
655 // java.io.File ///////////////////////////////////////////////////////////////
656
657 JVM_LEAF(char*, JVM_NativePath(char* path))
658 JVMWrapper2("JVM_NativePath (%s)", path);
659 return os::native_path(path);
660 JVM_END
661
662
663 // Misc. class handling ///////////////////////////////////////////////////////////
664
665
666 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
667 JVMWrapper("JVM_GetCallerClass");
668 Klass* k = thread->security_get_caller_class(depth);
669 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
670 JVM_END
671
672
673 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
674 JVMWrapper("JVM_FindPrimitiveClass");
675 oop mirror = NULL;
676 BasicType t = name2type(utf);
677 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
678 mirror = Universe::java_mirror(t);
679 }
680 if (mirror == NULL) {
681 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
682 } else {
683 return (jclass) JNIHandles::make_local(env, mirror);
684 }
685 JVM_END
686
687
688 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
689 JVMWrapper("JVM_ResolveClass");
690 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
691 JVM_END
692
693
694 // Returns a class loaded by the bootstrap class loader; or null
695 // if not found. ClassNotFoundException is not thrown.
696 //
697 // Rationale behind JVM_FindClassFromBootLoader
698 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
699 // b> because of (a) java.dll has a direct dependecy on the unexported
700 // private symbol "_JVM_FindClassFromClassLoader@20".
701 // c> the launcher cannot use the private symbol as it dynamically opens
702 // the entry point, so if something changes, the launcher will fail
703 // unexpectedly at runtime, it is safest for the launcher to dlopen a
704 // stable exported interface.
705 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
706 // signature to change from _JVM_FindClassFromClassLoader@20 to
707 // JVM_FindClassFromClassLoader and will not be backward compatible
708 // with older JDKs.
709 // Thus a public/stable exported entry point is the right solution,
710 // public here means public in linker semantics, and is exported only
711 // to the JDK, and is not intended to be a public API.
712
713 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
714 const char* name))
715 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
716
717 // Java libraries should ensure that name is never null...
718 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
719 // It's impossible to create this class; the name cannot fit
720 // into the constant pool.
721 return NULL;
722 }
723
724 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
725 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
726 if (k == NULL) {
727 return NULL;
728 }
729
730 if (TraceClassResolution) {
731 trace_class_resolution(k);
732 }
733 return (jclass) JNIHandles::make_local(env, k->java_mirror());
734 JVM_END
735
736 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
737 jboolean init, jobject loader,
738 jboolean throwError))
739 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
740 throwError ? "error" : "exception");
741 // Java libraries should ensure that name is never null...
742 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
743 // It's impossible to create this class; the name cannot fit
744 // into the constant pool.
745 if (throwError) {
746 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
747 } else {
748 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
749 }
750 }
751 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
752 Handle h_loader(THREAD, JNIHandles::resolve(loader));
753 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
754 Handle(), throwError, THREAD);
755
756 if (TraceClassResolution && result != NULL) {
757 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
758 }
759 return result;
760 JVM_END
761
762
763 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
764 jboolean init, jclass from))
765 JVMWrapper2("JVM_FindClassFromClass %s", name);
766 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
767 // It's impossible to create this class; the name cannot fit
768 // into the constant pool.
769 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
770 }
771 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
772 oop from_class_oop = JNIHandles::resolve(from);
773 Klass* from_class = (from_class_oop == NULL)
774 ? (Klass*)NULL
775 : java_lang_Class::as_Klass(from_class_oop);
776 oop class_loader = NULL;
777 oop protection_domain = NULL;
778 if (from_class != NULL) {
779 class_loader = from_class->class_loader();
780 protection_domain = from_class->protection_domain();
781 }
782 Handle h_loader(THREAD, class_loader);
783 Handle h_prot (THREAD, protection_domain);
784 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
785 h_prot, true, thread);
786
787 if (TraceClassResolution && result != NULL) {
788 // this function is generally only used for class loading during verification.
789 ResourceMark rm;
790 oop from_mirror = JNIHandles::resolve_non_null(from);
791 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
792 const char * from_name = from_class->external_name();
793
794 oop mirror = JNIHandles::resolve_non_null(result);
795 Klass* to_class = java_lang_Class::as_Klass(mirror);
796 const char * to = to_class->external_name();
797 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
798 }
799
800 return result;
801 JVM_END
802
803 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
804 if (loader.is_null()) {
805 return;
806 }
807
808 // check whether the current caller thread holds the lock or not.
809 // If not, increment the corresponding counter
810 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
811 ObjectSynchronizer::owner_self) {
812 counter->inc();
813 }
814 }
815
816 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
817 // and JVM_DefineClassWithSourceCond()
818 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
819 jobject loader, const jbyte *buf,
820 jsize len, jobject pd, const char *source,
821 jboolean verify, TRAPS) {
822 if (source == NULL) source = "__JVM_DefineClass__";
823
824 assert(THREAD->is_Java_thread(), "must be a JavaThread");
825 JavaThread* jt = (JavaThread*) THREAD;
826
827 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
828 ClassLoader::perf_define_appclass_selftime(),
829 ClassLoader::perf_define_appclasses(),
830 jt->get_thread_stat()->perf_recursion_counts_addr(),
831 jt->get_thread_stat()->perf_timers_addr(),
832 PerfClassTraceTime::DEFINE_CLASS);
833
834 if (UsePerfData) {
835 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
836 }
837
838 // Since exceptions can be thrown, class initialization can take place
839 // if name is NULL no check for class name in .class stream has to be made.
840 TempNewSymbol class_name = NULL;
841 if (name != NULL) {
842 const int str_len = (int)strlen(name);
843 if (str_len > Symbol::max_length()) {
844 // It's impossible to create this class; the name cannot fit
845 // into the constant pool.
846 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
847 }
848 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
849 }
850
851 ResourceMark rm(THREAD);
852 ClassFileStream st((u1*) buf, len, (char *)source);
853 Handle class_loader (THREAD, JNIHandles::resolve(loader));
854 if (UsePerfData) {
855 is_lock_held_by_thread(class_loader,
856 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
857 THREAD);
858 }
859 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
860 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
861 protection_domain, &st,
862 verify != 0,
863 CHECK_NULL);
864
865 if (TraceClassResolution && k != NULL) {
866 trace_class_resolution(k);
867 }
868
869 return (jclass) JNIHandles::make_local(env, k->java_mirror());
870 }
871
872
873 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
874 JVMWrapper2("JVM_DefineClass %s", name);
875
876 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
877 JVM_END
878
879
880 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
881 JVMWrapper2("JVM_DefineClassWithSource %s", name);
882
883 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
884 JVM_END
885
886 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
887 jobject loader, const jbyte *buf,
888 jsize len, jobject pd,
889 const char *source, jboolean verify))
890 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
891
892 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
893 JVM_END
894
895 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
896 JVMWrapper("JVM_FindLoadedClass");
897 ResourceMark rm(THREAD);
898
899 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
900 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
901
902 const char* str = java_lang_String::as_utf8_string(string());
903 // Sanity check, don't expect null
904 if (str == NULL) return NULL;
905
906 const int str_len = (int)strlen(str);
907 if (str_len > Symbol::max_length()) {
908 // It's impossible to create this class; the name cannot fit
909 // into the constant pool.
910 return NULL;
911 }
912 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
913
914 // Security Note:
915 // The Java level wrapper will perform the necessary security check allowing
916 // us to pass the NULL as the initiating class loader.
917 Handle h_loader(THREAD, JNIHandles::resolve(loader));
918 if (UsePerfData) {
919 is_lock_held_by_thread(h_loader,
920 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
921 THREAD);
922 }
923
924 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
925 h_loader,
926 Handle(),
927 CHECK_NULL);
928
929 return (k == NULL) ? NULL :
930 (jclass) JNIHandles::make_local(env, k->java_mirror());
931 JVM_END
932
933
934 // Reflection support //////////////////////////////////////////////////////////////////////////////
935
936 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
937 assert (cls != NULL, "illegal class");
938 JVMWrapper("JVM_GetClassName");
939 JvmtiVMObjectAllocEventCollector oam;
940 ResourceMark rm(THREAD);
941 const char* name;
942 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
943 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
944 } else {
945 // Consider caching interned string in Klass
946 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
947 assert(k->is_klass(), "just checking");
948 name = k->external_name();
949 }
950 oop result = StringTable::intern((char*) name, CHECK_NULL);
951 return (jstring) JNIHandles::make_local(env, result);
952 JVM_END
953
954
955 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
956 JVMWrapper("JVM_GetClassInterfaces");
957 JvmtiVMObjectAllocEventCollector oam;
958 oop mirror = JNIHandles::resolve_non_null(cls);
959
960 // Special handling for primitive objects
961 if (java_lang_Class::is_primitive(mirror)) {
962 // Primitive objects does not have any interfaces
963 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
964 return (jobjectArray) JNIHandles::make_local(env, r);
965 }
966
967 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
968 // Figure size of result array
969 int size;
970 if (klass->oop_is_instance()) {
971 size = InstanceKlass::cast(klass())->local_interfaces()->length();
972 } else {
973 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
974 size = 2;
975 }
976
977 // Allocate result array
978 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
979 objArrayHandle result (THREAD, r);
980 // Fill in result
981 if (klass->oop_is_instance()) {
982 // Regular instance klass, fill in all local interfaces
983 for (int index = 0; index < size; index++) {
984 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
985 result->obj_at_put(index, k->java_mirror());
986 }
987 } else {
988 // All arrays implement java.lang.Cloneable and java.io.Serializable
989 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
990 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
991 }
992 return (jobjectArray) JNIHandles::make_local(env, result());
993 JVM_END
994
995
996 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
997 JVMWrapper("JVM_GetClassLoader");
998 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
999 return NULL;
1000 }
1001 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1002 oop loader = k->class_loader();
1003 return JNIHandles::make_local(env, loader);
1004 JVM_END
1005
1006
1007 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1008 JVMWrapper("JVM_IsInterface");
1009 oop mirror = JNIHandles::resolve_non_null(cls);
1010 if (java_lang_Class::is_primitive(mirror)) {
1011 return JNI_FALSE;
1012 }
1013 Klass* k = java_lang_Class::as_Klass(mirror);
1014 jboolean result = k->is_interface();
1015 assert(!result || k->oop_is_instance(),
1016 "all interfaces are instance types");
1017 // The compiler intrinsic for isInterface tests the
1018 // Klass::_access_flags bits in the same way.
1019 return result;
1020 JVM_END
1021
1022
1023 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1024 JVMWrapper("JVM_GetClassSigners");
1025 JvmtiVMObjectAllocEventCollector oam;
1026 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1027 // There are no signers for primitive types
1028 return NULL;
1029 }
1030
1031 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1032 objArrayOop signers = NULL;
1033 if (k->oop_is_instance()) {
1034 signers = InstanceKlass::cast(k)->signers();
1035 }
1036
1037 // If there are no signers set in the class, or if the class
1038 // is an array, return NULL.
1039 if (signers == NULL) return NULL;
1040
1041 // copy of the signers array
1042 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1043 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1044 for (int index = 0; index < signers->length(); index++) {
1045 signers_copy->obj_at_put(index, signers->obj_at(index));
1046 }
1047
1048 // return the copy
1049 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1050 JVM_END
1051
1052
1053 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1054 JVMWrapper("JVM_SetClassSigners");
1055 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1056 // This call is ignored for primitive types and arrays.
1057 // Signers are only set once, ClassLoader.java, and thus shouldn't
1058 // be called with an array. Only the bootstrap loader creates arrays.
1059 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1060 if (k->oop_is_instance()) {
1061 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1062 }
1063 }
1064 JVM_END
1065
1066
1067 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1068 JVMWrapper("JVM_GetProtectionDomain");
1069 if (JNIHandles::resolve(cls) == NULL) {
1070 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1071 }
1072
1073 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1074 // Primitive types does not have a protection domain.
1075 return NULL;
1076 }
1077
1078 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1079 return (jobject) JNIHandles::make_local(env, k->protection_domain());
1080 JVM_END
1081
1082
1083 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1084 // still defined in core libraries as of 1.5.
1085 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1086 JVMWrapper("JVM_SetProtectionDomain");
1087 if (JNIHandles::resolve(cls) == NULL) {
1088 THROW(vmSymbols::java_lang_NullPointerException());
1089 }
1090 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1091 // Call is ignored for primitive types
1092 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1093
1094 // cls won't be an array, as this called only from ClassLoader.defineClass
1095 if (k->oop_is_instance()) {
1096 oop pd = JNIHandles::resolve(protection_domain);
1097 assert(pd == NULL || pd->is_oop(), "just checking");
1098 InstanceKlass::cast(k)->set_protection_domain(pd);
1099 }
1100 }
1101 JVM_END
1102
1103
1104 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1105 JVMWrapper("JVM_DoPrivileged");
1106
1107 if (action == NULL) {
1108 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1109 }
1110
1111 // Stack allocated list of privileged stack elements
1112 PrivilegedElement pi;
1113
1114 // Check that action object understands "Object run()"
1115 Handle object (THREAD, JNIHandles::resolve(action));
1116
1117 // get run() method
1118 Method* m_oop = object->klass()->uncached_lookup_method(
1119 vmSymbols::run_method_name(),
1120 vmSymbols::void_object_signature());
1121 methodHandle m (THREAD, m_oop);
1122 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1123 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1124 }
1125
1126 // Compute the frame initiating the do privileged operation and setup the privileged stack
1127 vframeStream vfst(thread);
1128 vfst.security_get_caller_frame(1);
1129
1130 if (!vfst.at_end()) {
1131 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1132 thread->set_privileged_stack_top(&pi);
1133 }
1134
1135
1136 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1137 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1138 Handle pending_exception;
1139 JavaValue result(T_OBJECT);
1140 JavaCallArguments args(object);
1141 JavaCalls::call(&result, m, &args, THREAD);
1142
1143 // done with action, remove ourselves from the list
1144 if (!vfst.at_end()) {
1145 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1146 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1147 }
1148
1149 if (HAS_PENDING_EXCEPTION) {
1150 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1151 CLEAR_PENDING_EXCEPTION;
1152
1153 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1154 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1155 // Throw a java.security.PrivilegedActionException(Exception e) exception
1156 JavaCallArguments args(pending_exception);
1157 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1158 vmSymbols::exception_void_signature(),
1159 &args);
1160 }
1161 }
1162
1163 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1164 return JNIHandles::make_local(env, (oop) result.get_jobject());
1165 JVM_END
1166
1167
1168 // Returns the inherited_access_control_context field of the running thread.
1169 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1170 JVMWrapper("JVM_GetInheritedAccessControlContext");
1171 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1172 return JNIHandles::make_local(env, result);
1173 JVM_END
1174
1175 class RegisterArrayForGC {
1176 private:
1177 JavaThread *_thread;
1178 public:
1179 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1180 _thread = thread;
1181 _thread->register_array_for_gc(array);
1182 }
1183
1184 ~RegisterArrayForGC() {
1185 _thread->register_array_for_gc(NULL);
1186 }
1187 };
1188
1189
1190 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1191 JVMWrapper("JVM_GetStackAccessControlContext");
1192 if (!UsePrivilegedStack) return NULL;
1193
1194 ResourceMark rm(THREAD);
1195 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1196 JvmtiVMObjectAllocEventCollector oam;
1197
1198 // count the protection domains on the execution stack. We collapse
1199 // duplicate consecutive protection domains into a single one, as
1200 // well as stopping when we hit a privileged frame.
1201
1202 // Use vframeStream to iterate through Java frames
1203 vframeStream vfst(thread);
1204
1205 oop previous_protection_domain = NULL;
1206 Handle privileged_context(thread, NULL);
1207 bool is_privileged = false;
1208 oop protection_domain = NULL;
1209
1210 for(; !vfst.at_end(); vfst.next()) {
1211 // get method of frame
1212 Method* method = vfst.method();
1213 intptr_t* frame_id = vfst.frame_id();
1214
1215 // check the privileged frames to see if we have a match
1216 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1217 // this frame is privileged
1218 is_privileged = true;
1219 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1220 protection_domain = thread->privileged_stack_top()->protection_domain();
1221 } else {
1222 protection_domain = method->method_holder()->protection_domain();
1223 }
1224
1225 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1226 local_array->push(protection_domain);
1227 previous_protection_domain = protection_domain;
1228 }
1229
1230 if (is_privileged) break;
1231 }
1232
1233
1234 // either all the domains on the stack were system domains, or
1235 // we had a privileged system domain
1236 if (local_array->is_empty()) {
1237 if (is_privileged && privileged_context.is_null()) return NULL;
1238
1239 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1240 return JNIHandles::make_local(env, result);
1241 }
1242
1243 // the resource area must be registered in case of a gc
1244 RegisterArrayForGC ragc(thread, local_array);
1245 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1246 local_array->length(), CHECK_NULL);
1247 objArrayHandle h_context(thread, context);
1248 for (int index = 0; index < local_array->length(); index++) {
1249 h_context->obj_at_put(index, local_array->at(index));
1250 }
1251
1252 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1253
1254 return JNIHandles::make_local(env, result);
1255 JVM_END
1256
1257
1258 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1259 JVMWrapper("JVM_IsArrayClass");
1260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1261 return (k != NULL) && k->oop_is_array() ? true : false;
1262 JVM_END
1263
1264
1265 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1266 JVMWrapper("JVM_IsPrimitiveClass");
1267 oop mirror = JNIHandles::resolve_non_null(cls);
1268 return (jboolean) java_lang_Class::is_primitive(mirror);
1269 JVM_END
1270
1271
1272 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1273 JVMWrapper("JVM_GetComponentType");
1274 oop mirror = JNIHandles::resolve_non_null(cls);
1275 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1276 return (jclass) JNIHandles::make_local(env, result);
1277 JVM_END
1278
1279
1280 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1281 JVMWrapper("JVM_GetClassModifiers");
1282 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1283 // Primitive type
1284 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1285 }
1286
1287 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1288 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1289 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1290 return k->modifier_flags();
1291 JVM_END
1292
1293
1294 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1295
1296 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1297 JvmtiVMObjectAllocEventCollector oam;
1298 // ofClass is a reference to a java_lang_Class object. The mirror object
1299 // of an InstanceKlass
1300
1301 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1302 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1303 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1304 return (jobjectArray)JNIHandles::make_local(env, result);
1305 }
1306
1307 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1308 InnerClassesIterator iter(k);
1309
1310 if (iter.length() == 0) {
1311 // Neither an inner nor outer class
1312 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1313 return (jobjectArray)JNIHandles::make_local(env, result);
1314 }
1315
1316 // find inner class info
1317 constantPoolHandle cp(thread, k->constants());
1318 int length = iter.length();
1319
1320 // Allocate temp. result array
1321 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1322 objArrayHandle result (THREAD, r);
1323 int members = 0;
1324
1325 for (; !iter.done(); iter.next()) {
1326 int ioff = iter.inner_class_info_index();
1327 int ooff = iter.outer_class_info_index();
1328
1329 if (ioff != 0 && ooff != 0) {
1330 // Check to see if the name matches the class we're looking for
1331 // before attempting to find the class.
1332 if (cp->klass_name_at_matches(k, ooff)) {
1333 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1334 if (outer_klass == k()) {
1335 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1336 instanceKlassHandle inner_klass (THREAD, ik);
1337
1338 // Throws an exception if outer klass has not declared k as
1339 // an inner klass
1340 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1341
1342 result->obj_at_put(members, inner_klass->java_mirror());
1343 members++;
1344 }
1345 }
1346 }
1347 }
1348
1349 if (members != length) {
1350 // Return array of right length
1351 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1352 for(int i = 0; i < members; i++) {
1353 res->obj_at_put(i, result->obj_at(i));
1354 }
1355 return (jobjectArray)JNIHandles::make_local(env, res);
1356 }
1357
1358 return (jobjectArray)JNIHandles::make_local(env, result());
1359 JVM_END
1360
1361
1362 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1363 {
1364 // ofClass is a reference to a java_lang_Class object.
1365 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1366 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1367 return NULL;
1368 }
1369
1370 bool inner_is_member = false;
1371 Klass* outer_klass
1372 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1373 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1374 if (outer_klass == NULL) return NULL; // already a top-level class
1375 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1376 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1377 }
1378 JVM_END
1379
1380 // should be in InstanceKlass.cpp, but is here for historical reasons
1381 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1382 bool* inner_is_member,
1383 TRAPS) {
1384 Thread* thread = THREAD;
1385 InnerClassesIterator iter(k);
1386 if (iter.length() == 0) {
1387 // No inner class info => no declaring class
1388 return NULL;
1389 }
1390
1391 constantPoolHandle i_cp(thread, k->constants());
1392
1393 bool found = false;
1394 Klass* ok;
1395 instanceKlassHandle outer_klass;
1396 *inner_is_member = false;
1397
1398 // Find inner_klass attribute
1399 for (; !iter.done() && !found; iter.next()) {
1400 int ioff = iter.inner_class_info_index();
1401 int ooff = iter.outer_class_info_index();
1402 int noff = iter.inner_name_index();
1403 if (ioff != 0) {
1404 // Check to see if the name matches the class we're looking for
1405 // before attempting to find the class.
1406 if (i_cp->klass_name_at_matches(k, ioff)) {
1407 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1408 found = (k() == inner_klass);
1409 if (found && ooff != 0) {
1410 ok = i_cp->klass_at(ooff, CHECK_NULL);
1411 outer_klass = instanceKlassHandle(thread, ok);
1412 *inner_is_member = true;
1413 }
1414 }
1415 }
1416 }
1417
1418 if (found && outer_klass.is_null()) {
1419 // It may be anonymous; try for that.
1420 int encl_method_class_idx = k->enclosing_method_class_index();
1421 if (encl_method_class_idx != 0) {
1422 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1423 outer_klass = instanceKlassHandle(thread, ok);
1424 *inner_is_member = false;
1425 }
1426 }
1427
1428 // If no inner class attribute found for this class.
1429 if (outer_klass.is_null()) return NULL;
1430
1431 // Throws an exception if outer klass has not declared k as an inner klass
1432 // We need evidence that each klass knows about the other, or else
1433 // the system could allow a spoof of an inner class to gain access rights.
1434 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1435 return outer_klass();
1436 }
1437
1438 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1439 assert (cls != NULL, "illegal class");
1440 JVMWrapper("JVM_GetClassSignature");
1441 JvmtiVMObjectAllocEventCollector oam;
1442 ResourceMark rm(THREAD);
1443 // Return null for arrays and primatives
1444 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1446 if (k->oop_is_instance()) {
1447 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1448 if (sym == NULL) return NULL;
1449 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1450 return (jstring) JNIHandles::make_local(env, str());
1451 }
1452 }
1453 return NULL;
1454 JVM_END
1455
1456
1457 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1458 assert (cls != NULL, "illegal class");
1459 JVMWrapper("JVM_GetClassAnnotations");
1460 ResourceMark rm(THREAD);
1461 // Return null for arrays and primitives
1462 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1464 if (k->oop_is_instance()) {
1465 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1466 return (jbyteArray) JNIHandles::make_local(env, a);
1467 }
1468 }
1469 return NULL;
1470 JVM_END
1471
1472
1473 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1474 assert(field != NULL, "illegal field");
1475 JVMWrapper("JVM_GetFieldAnnotations");
1476
1477 // some of this code was adapted from from jni_FromReflectedField
1478
1479 // field is a handle to a java.lang.reflect.Field object
1480 oop reflected = JNIHandles::resolve_non_null(field);
1481 oop mirror = java_lang_reflect_Field::clazz(reflected);
1482 Klass* k = java_lang_Class::as_Klass(mirror);
1483 int slot = java_lang_reflect_Field::slot(reflected);
1484 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1485
1486 fieldDescriptor fd;
1487 KlassHandle kh(THREAD, k);
1488 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1489
1490 if (modifiers & JVM_ACC_STATIC) {
1491 // for static fields we only look in the current class
1492 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1493 assert(false, "cannot find static field");
1494 return NULL; // robustness
1495 }
1496 } else {
1497 // for instance fields we start with the current class and work
1498 // our way up through the superclass chain
1499 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1500 assert(false, "cannot find instance field");
1501 return NULL; // robustness
1502 }
1503 }
1504
1505 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1506 JVM_END
1507
1508
1509 static Method* jvm_get_method_common(jobject method) {
1510 // some of this code was adapted from from jni_FromReflectedMethod
1511
1512 oop reflected = JNIHandles::resolve_non_null(method);
1513 oop mirror = NULL;
1514 int slot = 0;
1515
1516 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1517 mirror = java_lang_reflect_Constructor::clazz(reflected);
1518 slot = java_lang_reflect_Constructor::slot(reflected);
1519 } else {
1520 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1521 "wrong type");
1522 mirror = java_lang_reflect_Method::clazz(reflected);
1523 slot = java_lang_reflect_Method::slot(reflected);
1524 }
1525 Klass* k = java_lang_Class::as_Klass(mirror);
1526
1527 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1528 if (m == NULL) {
1529 assert(false, "cannot find method");
1530 return NULL; // robustness
1531 }
1532
1533 return m;
1534 }
1535
1536
1537 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1538 JVMWrapper("JVM_GetMethodAnnotations");
1539
1540 // method is a handle to a java.lang.reflect.Method object
1541 Method* m = jvm_get_method_common(method);
1542 return (jbyteArray) JNIHandles::make_local(env,
1543 Annotations::make_java_array(m->annotations(), THREAD));
1544 JVM_END
1545
1546
1547 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1548 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1549
1550 // method is a handle to a java.lang.reflect.Method object
1551 Method* m = jvm_get_method_common(method);
1552 return (jbyteArray) JNIHandles::make_local(env,
1553 Annotations::make_java_array(m->annotation_default(), THREAD));
1554 JVM_END
1555
1556
1557 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1558 JVMWrapper("JVM_GetMethodParameterAnnotations");
1559
1560 // method is a handle to a java.lang.reflect.Method object
1561 Method* m = jvm_get_method_common(method);
1562 return (jbyteArray) JNIHandles::make_local(env,
1563 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1564 JVM_END
1565
1566 /* Type use annotations support (JDK 1.8) */
1567
1568 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1569 assert (cls != NULL, "illegal class");
1570 JVMWrapper("JVM_GetClassTypeAnnotations");
1571 ResourceMark rm(THREAD);
1572 // Return null for arrays and primitives
1573 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1575 if (k->oop_is_instance()) {
1576 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1577 if (type_annotations != NULL) {
1578 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1579 return (jbyteArray) JNIHandles::make_local(env, a);
1580 }
1581 }
1582 }
1583 return NULL;
1584 JVM_END
1585
1586 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1587 if (!cp->is_within_bounds(index)) {
1588 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1589 }
1590 }
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 // make sure all the symbols are properly formatted
1603 for (int i = 0; i < num_params; i++) {
1604 MethodParametersElement* params = mh->method_parameters_start();
1605 int index = params[i].name_cp_index;
1606 bounds_check(mh->constants(), index, CHECK_NULL);
1607
1608 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1609 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1610 "Wrong type at constant pool index");
1611 }
1612
1613 }
1614
1615 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1616 objArrayHandle result (THREAD, result_oop);
1617
1618 for (int i = 0; i < num_params; i++) {
1619 MethodParametersElement* params = mh->method_parameters_start();
1620 // For a 0 index, give a NULL symbol
1621 Symbol* const sym = 0 != params[i].name_cp_index ?
1622 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1623 int flags = params[i].flags;
1624 oop param = Reflection::new_parameter(reflected_method, i, sym,
1625 flags, CHECK_NULL);
1626 result->obj_at_put(i, param);
1627 }
1628 return (jobjectArray)JNIHandles::make_local(env, result());
1629 } else {
1630 return (jobjectArray)NULL;
1631 }
1632 }
1633 JVM_END
1634
1635 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1636
1637 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1638 {
1639 JVMWrapper("JVM_GetClassDeclaredFields");
1640 JvmtiVMObjectAllocEventCollector oam;
1641
1642 // Exclude primitive types and array types
1643 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1644 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1645 // Return empty array
1646 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1647 return (jobjectArray) JNIHandles::make_local(env, res);
1648 }
1649
1650 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1651 constantPoolHandle cp(THREAD, k->constants());
1652
1653 // Ensure class is linked
1654 k->link_class(CHECK_NULL);
1655
1656 // 4496456 We need to filter out java.lang.Throwable.backtrace
1657 bool skip_backtrace = false;
1658
1659 // Allocate result
1660 int num_fields;
1661
1662 if (publicOnly) {
1663 num_fields = 0;
1664 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1665 if (fs.access_flags().is_public()) ++num_fields;
1666 }
1667 } else {
1668 num_fields = k->java_fields_count();
1669
1670 if (k() == SystemDictionary::Throwable_klass()) {
1671 num_fields--;
1672 skip_backtrace = true;
1673 }
1674 }
1675
1676 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1677 objArrayHandle result (THREAD, r);
1678
1679 int out_idx = 0;
1680 fieldDescriptor fd;
1681 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1682 if (skip_backtrace) {
1683 // 4496456 skip java.lang.Throwable.backtrace
1684 int offset = fs.offset();
1685 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1686 }
1687
1688 if (!publicOnly || fs.access_flags().is_public()) {
1689 fd.initialize(k(), fs.index());
1690 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1691 result->obj_at_put(out_idx, field);
1692 ++out_idx;
1693 }
1694 }
1695 assert(out_idx == num_fields, "just checking");
1696 return (jobjectArray) JNIHandles::make_local(env, result());
1697 }
1698 JVM_END
1699
1700 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1701 {
1702 JVMWrapper("JVM_GetClassDeclaredMethods");
1703 JvmtiVMObjectAllocEventCollector oam;
1704
1705 // Exclude primitive types and array types
1706 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1707 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1708 // Return empty array
1709 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1710 return (jobjectArray) JNIHandles::make_local(env, res);
1711 }
1712
1713 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1714
1715 // Ensure class is linked
1716 k->link_class(CHECK_NULL);
1717
1718 Array<Method*>* methods = k->methods();
1719 int methods_length = methods->length();
1720 int num_methods = 0;
1721
1722 int i;
1723 for (i = 0; i < methods_length; i++) {
1724 methodHandle method(THREAD, methods->at(i));
1725 if (!method->is_initializer()) {
1726 if (!publicOnly || method->is_public()) {
1727 ++num_methods;
1728 }
1729 }
1730 }
1731
1732 // Allocate result
1733 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1734 objArrayHandle result (THREAD, r);
1735
1736 int out_idx = 0;
1737 for (i = 0; i < methods_length; i++) {
1738 methodHandle method(THREAD, methods->at(i));
1739 if (!method->is_initializer()) {
1740 if (!publicOnly || method->is_public()) {
1741 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1742 result->obj_at_put(out_idx, m);
1743 ++out_idx;
1744 }
1745 }
1746 }
1747 assert(out_idx == num_methods, "just checking");
1748 return (jobjectArray) JNIHandles::make_local(env, result());
1749 }
1750 JVM_END
1751
1752 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1753 {
1754 JVMWrapper("JVM_GetClassDeclaredConstructors");
1755 JvmtiVMObjectAllocEventCollector oam;
1756
1757 // Exclude primitive types and array types
1758 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1759 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1760 // Return empty array
1761 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1762 return (jobjectArray) JNIHandles::make_local(env, res);
1763 }
1764
1765 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1766
1767 // Ensure class is linked
1768 k->link_class(CHECK_NULL);
1769
1770 Array<Method*>* methods = k->methods();
1771 int methods_length = methods->length();
1772 int num_constructors = 0;
1773
1774 int i;
1775 for (i = 0; i < methods_length; i++) {
1776 methodHandle method(THREAD, methods->at(i));
1777 if (method->is_initializer() && !method->is_static()) {
1778 if (!publicOnly || method->is_public()) {
1779 ++num_constructors;
1780 }
1781 }
1782 }
1783
1784 // Allocate result
1785 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1786 objArrayHandle result(THREAD, r);
1787
1788 int out_idx = 0;
1789 for (i = 0; i < methods_length; i++) {
1790 methodHandle method(THREAD, methods->at(i));
1791 if (method->is_initializer() && !method->is_static()) {
1792 if (!publicOnly || method->is_public()) {
1793 oop m = Reflection::new_constructor(method, CHECK_NULL);
1794 result->obj_at_put(out_idx, m);
1795 ++out_idx;
1796 }
1797 }
1798 }
1799 assert(out_idx == num_constructors, "just checking");
1800 return (jobjectArray) JNIHandles::make_local(env, result());
1801 }
1802 JVM_END
1803
1804 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1805 {
1806 JVMWrapper("JVM_GetClassAccessFlags");
1807 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1808 // Primitive type
1809 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1810 }
1811
1812 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1813 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1814 }
1815 JVM_END
1816
1817
1818 // Constant pool access //////////////////////////////////////////////////////////
1819
1820 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1821 {
1822 JVMWrapper("JVM_GetClassConstantPool");
1823 JvmtiVMObjectAllocEventCollector oam;
1824
1825 // Return null for primitives and arrays
1826 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1827 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1828 if (k->oop_is_instance()) {
1829 instanceKlassHandle k_h(THREAD, k);
1830 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1831 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1832 return JNIHandles::make_local(jcp());
1833 }
1834 }
1835 return NULL;
1836 }
1837 JVM_END
1838
1839
1840 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1841 {
1842 JVMWrapper("JVM_ConstantPoolGetSize");
1843 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1844 return cp->length();
1845 }
1846 JVM_END
1847
1848
1849 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1850 {
1851 JVMWrapper("JVM_ConstantPoolGetClassAt");
1852 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1853 bounds_check(cp, index, CHECK_NULL);
1854 constantTag tag = cp->tag_at(index);
1855 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1856 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1857 }
1858 Klass* k = cp->klass_at(index, CHECK_NULL);
1859 return (jclass) JNIHandles::make_local(k->java_mirror());
1860 }
1861 JVM_END
1862
1863 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1864 {
1865 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1866 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1867 bounds_check(cp, index, CHECK_NULL);
1868 constantTag tag = cp->tag_at(index);
1869 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1870 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1871 }
1872 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1873 if (k == NULL) return NULL;
1874 return (jclass) JNIHandles::make_local(k->java_mirror());
1875 }
1876 JVM_END
1877
1878 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1879 constantTag tag = cp->tag_at(index);
1880 if (!tag.is_method() && !tag.is_interface_method()) {
1881 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1882 }
1883 int klass_ref = cp->uncached_klass_ref_index_at(index);
1884 Klass* k_o;
1885 if (force_resolution) {
1886 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1887 } else {
1888 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1889 if (k_o == NULL) return NULL;
1890 }
1891 instanceKlassHandle k(THREAD, k_o);
1892 Symbol* name = cp->uncached_name_ref_at(index);
1893 Symbol* sig = cp->uncached_signature_ref_at(index);
1894 methodHandle m (THREAD, k->find_method(name, sig));
1895 if (m.is_null()) {
1896 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1897 }
1898 oop method;
1899 if (!m->is_initializer() || m->is_static()) {
1900 method = Reflection::new_method(m, true, true, CHECK_NULL);
1901 } else {
1902 method = Reflection::new_constructor(m, CHECK_NULL);
1903 }
1904 return JNIHandles::make_local(method);
1905 }
1906
1907 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1908 {
1909 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1910 JvmtiVMObjectAllocEventCollector oam;
1911 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1912 bounds_check(cp, index, CHECK_NULL);
1913 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1914 return res;
1915 }
1916 JVM_END
1917
1918 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1919 {
1920 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1921 JvmtiVMObjectAllocEventCollector oam;
1922 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1923 bounds_check(cp, index, CHECK_NULL);
1924 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1925 return res;
1926 }
1927 JVM_END
1928
1929 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1930 constantTag tag = cp->tag_at(index);
1931 if (!tag.is_field()) {
1932 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1933 }
1934 int klass_ref = cp->uncached_klass_ref_index_at(index);
1935 Klass* k_o;
1936 if (force_resolution) {
1937 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1938 } else {
1939 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1940 if (k_o == NULL) return NULL;
1941 }
1942 instanceKlassHandle k(THREAD, k_o);
1943 Symbol* name = cp->uncached_name_ref_at(index);
1944 Symbol* sig = cp->uncached_signature_ref_at(index);
1945 fieldDescriptor fd;
1946 Klass* target_klass = k->find_field(name, sig, &fd);
1947 if (target_klass == NULL) {
1948 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1949 }
1950 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1951 return JNIHandles::make_local(field);
1952 }
1953
1954 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
1955 {
1956 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1957 JvmtiVMObjectAllocEventCollector oam;
1958 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1959 bounds_check(cp, index, CHECK_NULL);
1960 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1961 return res;
1962 }
1963 JVM_END
1964
1965 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1966 {
1967 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1968 JvmtiVMObjectAllocEventCollector oam;
1969 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1970 bounds_check(cp, index, CHECK_NULL);
1971 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1972 return res;
1973 }
1974 JVM_END
1975
1976 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1977 {
1978 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1979 JvmtiVMObjectAllocEventCollector oam;
1980 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1981 bounds_check(cp, index, CHECK_NULL);
1982 constantTag tag = cp->tag_at(index);
1983 if (!tag.is_field_or_method()) {
1984 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1985 }
1986 int klass_ref = cp->uncached_klass_ref_index_at(index);
1987 Symbol* klass_name = cp->klass_name_at(klass_ref);
1988 Symbol* member_name = cp->uncached_name_ref_at(index);
1989 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1990 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1991 objArrayHandle dest(THREAD, dest_o);
1992 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1993 dest->obj_at_put(0, str());
1994 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1995 dest->obj_at_put(1, str());
1996 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1997 dest->obj_at_put(2, str());
1998 return (jobjectArray) JNIHandles::make_local(dest());
1999 }
2000 JVM_END
2001
2002 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2003 {
2004 JVMWrapper("JVM_ConstantPoolGetIntAt");
2005 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2006 bounds_check(cp, index, CHECK_0);
2007 constantTag tag = cp->tag_at(index);
2008 if (!tag.is_int()) {
2009 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2010 }
2011 return cp->int_at(index);
2012 }
2013 JVM_END
2014
2015 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2016 {
2017 JVMWrapper("JVM_ConstantPoolGetLongAt");
2018 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2019 bounds_check(cp, index, CHECK_(0L));
2020 constantTag tag = cp->tag_at(index);
2021 if (!tag.is_long()) {
2022 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2023 }
2024 return cp->long_at(index);
2025 }
2026 JVM_END
2027
2028 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2029 {
2030 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2031 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2032 bounds_check(cp, index, CHECK_(0.0f));
2033 constantTag tag = cp->tag_at(index);
2034 if (!tag.is_float()) {
2035 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2036 }
2037 return cp->float_at(index);
2038 }
2039 JVM_END
2040
2041 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2042 {
2043 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2044 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2045 bounds_check(cp, index, CHECK_(0.0));
2046 constantTag tag = cp->tag_at(index);
2047 if (!tag.is_double()) {
2048 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2049 }
2050 return cp->double_at(index);
2051 }
2052 JVM_END
2053
2054 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2055 {
2056 JVMWrapper("JVM_ConstantPoolGetStringAt");
2057 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058 bounds_check(cp, index, CHECK_NULL);
2059 constantTag tag = cp->tag_at(index);
2060 if (!tag.is_string()) {
2061 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2062 }
2063 oop str = cp->string_at(index, CHECK_NULL);
2064 return (jstring) JNIHandles::make_local(str);
2065 }
2066 JVM_END
2067
2068 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2069 {
2070 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2071 JvmtiVMObjectAllocEventCollector oam;
2072 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073 bounds_check(cp, index, CHECK_NULL);
2074 constantTag tag = cp->tag_at(index);
2075 if (!tag.is_symbol()) {
2076 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2077 }
2078 Symbol* sym = cp->symbol_at(index);
2079 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2080 return (jstring) JNIHandles::make_local(str());
2081 }
2082 JVM_END
2083
2084
2085 // Assertion support. //////////////////////////////////////////////////////////
2086
2087 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2088 JVMWrapper("JVM_DesiredAssertionStatus");
2089 assert(cls != NULL, "bad class");
2090
2091 oop r = JNIHandles::resolve(cls);
2092 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2093 if (java_lang_Class::is_primitive(r)) return false;
2094
2095 Klass* k = java_lang_Class::as_Klass(r);
2096 assert(k->oop_is_instance(), "must be an instance klass");
2097 if (! k->oop_is_instance()) return false;
2098
2099 ResourceMark rm(THREAD);
2100 const char* name = k->name()->as_C_string();
2101 bool system_class = k->class_loader() == NULL;
2102 return JavaAssertions::enabled(name, system_class);
2103
2104 JVM_END
2105
2106
2107 // Return a new AssertionStatusDirectives object with the fields filled in with
2108 // command-line assertion arguments (i.e., -ea, -da).
2109 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2110 JVMWrapper("JVM_AssertionStatusDirectives");
2111 JvmtiVMObjectAllocEventCollector oam;
2112 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2113 return JNIHandles::make_local(env, asd);
2114 JVM_END
2115
2116 // Verification ////////////////////////////////////////////////////////////////////////////////
2117
2118 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2119
2120 // RedefineClasses support: bug 6214132 caused verification to fail.
2121 // All functions from this section should call the jvmtiThreadSate function:
2122 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2123 // The function returns a Klass* of the _scratch_class if the verifier
2124 // was invoked in the middle of the class redefinition.
2125 // Otherwise it returns its argument value which is the _the_class Klass*.
2126 // Please, refer to the description in the jvmtiThreadSate.hpp.
2127
2128 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2129 JVMWrapper("JVM_GetClassNameUTF");
2130 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2131 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2132 return k->name()->as_utf8();
2133 JVM_END
2134
2135
2136 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2137 JVMWrapper("JVM_GetClassCPTypes");
2138 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2140 // types will have length zero if this is not an InstanceKlass
2141 // (length is determined by call to JVM_GetClassCPEntriesCount)
2142 if (k->oop_is_instance()) {
2143 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2144 for (int index = cp->length() - 1; index >= 0; index--) {
2145 constantTag tag = cp->tag_at(index);
2146 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2147 }
2148 }
2149 JVM_END
2150
2151
2152 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2153 JVMWrapper("JVM_GetClassCPEntriesCount");
2154 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2156 if (!k->oop_is_instance())
2157 return 0;
2158 return InstanceKlass::cast(k)->constants()->length();
2159 JVM_END
2160
2161
2162 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2163 JVMWrapper("JVM_GetClassFieldsCount");
2164 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2165 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2166 if (!k->oop_is_instance())
2167 return 0;
2168 return InstanceKlass::cast(k)->java_fields_count();
2169 JVM_END
2170
2171
2172 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2173 JVMWrapper("JVM_GetClassMethodsCount");
2174 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2175 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2176 if (!k->oop_is_instance())
2177 return 0;
2178 return InstanceKlass::cast(k)->methods()->length();
2179 JVM_END
2180
2181
2182 // The following methods, used for the verifier, are never called with
2183 // array klasses, so a direct cast to InstanceKlass is safe.
2184 // Typically, these methods are called in a loop with bounds determined
2185 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2186 // zero for arrays.
2187 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2188 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2189 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2190 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2191 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2192 int length = method->checked_exceptions_length();
2193 if (length > 0) {
2194 CheckedExceptionElement* table= method->checked_exceptions_start();
2195 for (int i = 0; i < length; i++) {
2196 exceptions[i] = table[i].class_cp_index;
2197 }
2198 }
2199 JVM_END
2200
2201
2202 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2203 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2204 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2205 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2206 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2207 return method->checked_exceptions_length();
2208 JVM_END
2209
2210
2211 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2212 JVMWrapper("JVM_GetMethodIxByteCode");
2213 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2214 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2215 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2216 memcpy(code, method->code_base(), method->code_size());
2217 JVM_END
2218
2219
2220 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2221 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2222 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2223 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2224 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2225 return method->code_size();
2226 JVM_END
2227
2228
2229 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2230 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2231 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2232 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2233 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2234 ExceptionTable extable(method);
2235 entry->start_pc = extable.start_pc(entry_index);
2236 entry->end_pc = extable.end_pc(entry_index);
2237 entry->handler_pc = extable.handler_pc(entry_index);
2238 entry->catchType = extable.catch_type_index(entry_index);
2239 JVM_END
2240
2241
2242 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2243 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2244 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2245 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2246 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2247 return method->exception_table_length();
2248 JVM_END
2249
2250
2251 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2252 JVMWrapper("JVM_GetMethodIxModifiers");
2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2255 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2256 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2257 JVM_END
2258
2259
2260 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2261 JVMWrapper("JVM_GetFieldIxModifiers");
2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2265 JVM_END
2266
2267
2268 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2269 JVMWrapper("JVM_GetMethodIxLocalsCount");
2270 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2273 return method->max_locals();
2274 JVM_END
2275
2276
2277 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2278 JVMWrapper("JVM_GetMethodIxArgsSize");
2279 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2280 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2281 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2282 return method->size_of_parameters();
2283 JVM_END
2284
2285
2286 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2287 JVMWrapper("JVM_GetMethodIxMaxStack");
2288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2290 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2291 return method->verifier_max_stack();
2292 JVM_END
2293
2294
2295 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2296 JVMWrapper("JVM_IsConstructorIx");
2297 ResourceMark rm(THREAD);
2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2301 return method->name() == vmSymbols::object_initializer_name();
2302 JVM_END
2303
2304
2305 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2306 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2307 ResourceMark rm(THREAD);
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->is_overpass();
2312 JVM_END
2313
2314 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2315 JVMWrapper("JVM_GetMethodIxIxUTF");
2316 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2317 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2318 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2319 return method->name()->as_utf8();
2320 JVM_END
2321
2322
2323 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2324 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2328 return method->signature()->as_utf8();
2329 JVM_END
2330
2331 /**
2332 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2333 * read entries in the constant pool. Since the old verifier always
2334 * works on a copy of the code, it will not see any rewriting that
2335 * may possibly occur in the middle of verification. So it is important
2336 * that nothing it calls tries to use the cpCache instead of the raw
2337 * constant pool, so we must use cp->uncached_x methods when appropriate.
2338 */
2339 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2340 JVMWrapper("JVM_GetCPFieldNameUTF");
2341 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2342 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2343 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2344 switch (cp->tag_at(cp_index).value()) {
2345 case JVM_CONSTANT_Fieldref:
2346 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2347 default:
2348 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2349 }
2350 ShouldNotReachHere();
2351 return NULL;
2352 JVM_END
2353
2354
2355 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2356 JVMWrapper("JVM_GetCPMethodNameUTF");
2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2360 switch (cp->tag_at(cp_index).value()) {
2361 case JVM_CONSTANT_InterfaceMethodref:
2362 case JVM_CONSTANT_Methodref:
2363 case JVM_CONSTANT_NameAndType: // for invokedynamic
2364 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2365 default:
2366 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2367 }
2368 ShouldNotReachHere();
2369 return NULL;
2370 JVM_END
2371
2372
2373 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2374 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2375 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2376 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2377 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2378 switch (cp->tag_at(cp_index).value()) {
2379 case JVM_CONSTANT_InterfaceMethodref:
2380 case JVM_CONSTANT_Methodref:
2381 case JVM_CONSTANT_NameAndType: // for invokedynamic
2382 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2383 default:
2384 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2385 }
2386 ShouldNotReachHere();
2387 return NULL;
2388 JVM_END
2389
2390
2391 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2392 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2395 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2396 switch (cp->tag_at(cp_index).value()) {
2397 case JVM_CONSTANT_Fieldref:
2398 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2399 default:
2400 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2401 }
2402 ShouldNotReachHere();
2403 return NULL;
2404 JVM_END
2405
2406
2407 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2408 JVMWrapper("JVM_GetCPClassNameUTF");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2412 Symbol* classname = cp->klass_name_at(cp_index);
2413 return classname->as_utf8();
2414 JVM_END
2415
2416
2417 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2418 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2422 switch (cp->tag_at(cp_index).value()) {
2423 case JVM_CONSTANT_Fieldref: {
2424 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2425 Symbol* classname = cp->klass_name_at(class_index);
2426 return classname->as_utf8();
2427 }
2428 default:
2429 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2430 }
2431 ShouldNotReachHere();
2432 return NULL;
2433 JVM_END
2434
2435
2436 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2437 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2440 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2441 switch (cp->tag_at(cp_index).value()) {
2442 case JVM_CONSTANT_Methodref:
2443 case JVM_CONSTANT_InterfaceMethodref: {
2444 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2445 Symbol* classname = cp->klass_name_at(class_index);
2446 return classname->as_utf8();
2447 }
2448 default:
2449 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2450 }
2451 ShouldNotReachHere();
2452 return NULL;
2453 JVM_END
2454
2455
2456 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2457 JVMWrapper("JVM_GetCPFieldModifiers");
2458 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2459 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2462 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2463 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2464 switch (cp->tag_at(cp_index).value()) {
2465 case JVM_CONSTANT_Fieldref: {
2466 Symbol* name = cp->uncached_name_ref_at(cp_index);
2467 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2468 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2469 if (fs.name() == name && fs.signature() == signature) {
2470 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2471 }
2472 }
2473 return -1;
2474 }
2475 default:
2476 fatal("JVM_GetCPFieldModifiers: illegal constant");
2477 }
2478 ShouldNotReachHere();
2479 return 0;
2480 JVM_END
2481
2482
2483 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2484 JVMWrapper("JVM_GetCPMethodModifiers");
2485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2486 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2487 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2488 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2489 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2490 switch (cp->tag_at(cp_index).value()) {
2491 case JVM_CONSTANT_Methodref:
2492 case JVM_CONSTANT_InterfaceMethodref: {
2493 Symbol* name = cp->uncached_name_ref_at(cp_index);
2494 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2495 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2496 int methods_count = methods->length();
2497 for (int i = 0; i < methods_count; i++) {
2498 Method* method = methods->at(i);
2499 if (method->name() == name && method->signature() == signature) {
2500 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2501 }
2502 }
2503 return -1;
2504 }
2505 default:
2506 fatal("JVM_GetCPMethodModifiers: illegal constant");
2507 }
2508 ShouldNotReachHere();
2509 return 0;
2510 JVM_END
2511
2512
2513 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2514
2515 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2516 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2517 JVM_END
2518
2519
2520 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2521 JVMWrapper("JVM_IsSameClassPackage");
2522 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2523 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2524 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2525 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2526 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2527 JVM_END
2528
2529
2530 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2531
2532 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2533 JVMWrapper2("JVM_Open (%s)", fname);
2534
2535 //%note jvm_r6
2536 int result = os::open(fname, flags, mode);
2537 if (result >= 0) {
2538 return result;
2539 } else {
2540 switch(errno) {
2541 case EEXIST:
2542 return JVM_EEXIST;
2543 default:
2544 return -1;
2545 }
2546 }
2547 JVM_END
2548
2549
2550 JVM_LEAF(jint, JVM_Close(jint fd))
2551 JVMWrapper2("JVM_Close (0x%x)", fd);
2552 //%note jvm_r6
2553 return os::close(fd);
2554 JVM_END
2555
2556
2557 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2558 JVMWrapper2("JVM_Read (0x%x)", fd);
2559
2560 //%note jvm_r6
2561 return (jint)os::restartable_read(fd, buf, nbytes);
2562 JVM_END
2563
2564
2565 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2566 JVMWrapper2("JVM_Write (0x%x)", fd);
2567
2568 //%note jvm_r6
2569 return (jint)os::write(fd, buf, nbytes);
2570 JVM_END
2571
2572
2573 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2574 JVMWrapper2("JVM_Available (0x%x)", fd);
2575 //%note jvm_r6
2576 return os::available(fd, pbytes);
2577 JVM_END
2578
2579
2580 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2581 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2582 //%note jvm_r6
2583 return os::lseek(fd, offset, whence);
2584 JVM_END
2585
2586
2587 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2588 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2589 return os::ftruncate(fd, length);
2590 JVM_END
2591
2592
2593 JVM_LEAF(jint, JVM_Sync(jint fd))
2594 JVMWrapper2("JVM_Sync (0x%x)", fd);
2595 //%note jvm_r6
2596 return os::fsync(fd);
2597 JVM_END
2598
2599
2600 // Printing support //////////////////////////////////////////////////
2601 extern "C" {
2602
2603 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2604 // see bug 4399518, 4417214
2605 if ((intptr_t)count <= 0) return -1;
2606 return vsnprintf(str, count, fmt, args);
2607 }
2608
2609
2610 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2611 va_list args;
2612 int len;
2613 va_start(args, fmt);
2614 len = jio_vsnprintf(str, count, fmt, args);
2615 va_end(args);
2616 return len;
2617 }
2618
2619
2620 int jio_fprintf(FILE* f, const char *fmt, ...) {
2621 int len;
2622 va_list args;
2623 va_start(args, fmt);
2624 len = jio_vfprintf(f, fmt, args);
2625 va_end(args);
2626 return len;
2627 }
2628
2629
2630 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2631 if (Arguments::vfprintf_hook() != NULL) {
2632 return Arguments::vfprintf_hook()(f, fmt, args);
2633 } else {
2634 return vfprintf(f, fmt, args);
2635 }
2636 }
2637
2638
2639 JNIEXPORT int jio_printf(const char *fmt, ...) {
2640 int len;
2641 va_list args;
2642 va_start(args, fmt);
2643 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2644 va_end(args);
2645 return len;
2646 }
2647
2648
2649 // HotSpot specific jio method
2650 void jio_print(const char* s) {
2651 // Try to make this function as atomic as possible.
2652 if (Arguments::vfprintf_hook() != NULL) {
2653 jio_fprintf(defaultStream::output_stream(), "%s", s);
2654 } else {
2655 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2656 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2657 }
2658 }
2659
2660 } // Extern C
2661
2662 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2663
2664 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2665 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2666 // OSThread objects. The exception to this rule is when the target object is the thread
2667 // doing the operation, in which case we know that the thread won't exit until the
2668 // operation is done (all exits being voluntary). There are a few cases where it is
2669 // rather silly to do operations on yourself, like resuming yourself or asking whether
2670 // you are alive. While these can still happen, they are not subject to deadlocks if
2671 // the lock is held while the operation occurs (this is not the case for suspend, for
2672 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2673 // implementation is local to this file, we always lock Threads_lock for that one.
2674
2675 static void thread_entry(JavaThread* thread, TRAPS) {
2676 HandleMark hm(THREAD);
2677 Handle obj(THREAD, thread->threadObj());
2678 JavaValue result(T_VOID);
2679 JavaCalls::call_virtual(&result,
2680 obj,
2681 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2682 vmSymbols::run_method_name(),
2683 vmSymbols::void_method_signature(),
2684 THREAD);
2685 }
2686
2687
2688 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2689 JVMWrapper("JVM_StartThread");
2690 JavaThread *native_thread = NULL;
2691
2692 // We cannot hold the Threads_lock when we throw an exception,
2693 // due to rank ordering issues. Example: we might need to grab the
2694 // Heap_lock while we construct the exception.
2695 bool throw_illegal_thread_state = false;
2696
2697 // We must release the Threads_lock before we can post a jvmti event
2698 // in Thread::start.
2699 {
2700 // Ensure that the C++ Thread and OSThread structures aren't freed before
2701 // we operate.
2702 MutexLocker mu(Threads_lock);
2703
2704 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2705 // re-starting an already started thread, so we should usually find
2706 // that the JavaThread is null. However for a JNI attached thread
2707 // there is a small window between the Thread object being created
2708 // (with its JavaThread set) and the update to its threadStatus, so we
2709 // have to check for this
2710 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2711 throw_illegal_thread_state = true;
2712 } else {
2713 // We could also check the stillborn flag to see if this thread was already stopped, but
2714 // for historical reasons we let the thread detect that itself when it starts running
2715
2716 jlong size =
2717 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2718 // Allocate the C++ Thread structure and create the native thread. The
2719 // stack size retrieved from java is signed, but the constructor takes
2720 // size_t (an unsigned type), so avoid passing negative values which would
2721 // result in really large stacks.
2722 size_t sz = size > 0 ? (size_t) size : 0;
2723 native_thread = new JavaThread(&thread_entry, sz);
2724
2725 // At this point it may be possible that no osthread was created for the
2726 // JavaThread due to lack of memory. Check for this situation and throw
2727 // an exception if necessary. Eventually we may want to change this so
2728 // that we only grab the lock if the thread was created successfully -
2729 // then we can also do this check and throw the exception in the
2730 // JavaThread constructor.
2731 if (native_thread->osthread() != NULL) {
2732 // Note: the current thread is not being used within "prepare".
2733 native_thread->prepare(jthread);
2734 }
2735 }
2736 }
2737
2738 if (throw_illegal_thread_state) {
2739 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2740 }
2741
2742 assert(native_thread != NULL, "Starting null thread?");
2743
2744 if (native_thread->osthread() == NULL) {
2745 // No one should hold a reference to the 'native_thread'.
2746 delete native_thread;
2747 if (JvmtiExport::should_post_resource_exhausted()) {
2748 JvmtiExport::post_resource_exhausted(
2749 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2750 "unable to create new native thread");
2751 }
2752 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2753 "unable to create new native thread");
2754 }
2755
2756 Thread::start(native_thread);
2757
2758 JVM_END
2759
2760 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2761 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2762 // but is thought to be reliable and simple. In the case, where the receiver is the
2763 // same thread as the sender, no safepoint is needed.
2764 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2765 JVMWrapper("JVM_StopThread");
2766
2767 oop java_throwable = JNIHandles::resolve(throwable);
2768 if (java_throwable == NULL) {
2769 THROW(vmSymbols::java_lang_NullPointerException());
2770 }
2771 oop java_thread = JNIHandles::resolve_non_null(jthread);
2772 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2773 Events::log_exception(JavaThread::current(),
2774 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2775 receiver, (address)java_thread, throwable);
2776 // First check if thread is alive
2777 if (receiver != NULL) {
2778 // Check if exception is getting thrown at self (use oop equality, since the
2779 // target object might exit)
2780 if (java_thread == thread->threadObj()) {
2781 THROW_OOP(java_throwable);
2782 } else {
2783 // Enques a VM_Operation to stop all threads and then deliver the exception...
2784 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2785 }
2786 }
2787 else {
2788 // Either:
2789 // - target thread has not been started before being stopped, or
2790 // - target thread already terminated
2791 // We could read the threadStatus to determine which case it is
2792 // but that is overkill as it doesn't matter. We must set the
2793 // stillborn flag for the first case, and if the thread has already
2794 // exited setting this flag has no affect
2795 java_lang_Thread::set_stillborn(java_thread);
2796 }
2797 JVM_END
2798
2799
2800 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2801 JVMWrapper("JVM_IsThreadAlive");
2802
2803 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2804 return java_lang_Thread::is_alive(thread_oop);
2805 JVM_END
2806
2807
2808 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2809 JVMWrapper("JVM_SuspendThread");
2810 oop java_thread = JNIHandles::resolve_non_null(jthread);
2811 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2812
2813 if (receiver != NULL) {
2814 // thread has run and has not exited (still on threads list)
2815
2816 {
2817 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2818 if (receiver->is_external_suspend()) {
2819 // Don't allow nested external suspend requests. We can't return
2820 // an error from this interface so just ignore the problem.
2821 return;
2822 }
2823 if (receiver->is_exiting()) { // thread is in the process of exiting
2824 return;
2825 }
2826 receiver->set_external_suspend();
2827 }
2828
2829 // java_suspend() will catch threads in the process of exiting
2830 // and will ignore them.
2831 receiver->java_suspend();
2832
2833 // It would be nice to have the following assertion in all the
2834 // time, but it is possible for a racing resume request to have
2835 // resumed this thread right after we suspended it. Temporarily
2836 // enable this assertion if you are chasing a different kind of
2837 // bug.
2838 //
2839 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2840 // receiver->is_being_ext_suspended(), "thread is not suspended");
2841 }
2842 JVM_END
2843
2844
2845 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2846 JVMWrapper("JVM_ResumeThread");
2847 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2848 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2849 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2850 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2851 // looks at it.
2852 MutexLocker ml(Threads_lock);
2853 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2854 if (thr != NULL) {
2855 // the thread has run and is not in the process of exiting
2856 thr->java_resume();
2857 }
2858 JVM_END
2859
2860
2861 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2862 JVMWrapper("JVM_SetThreadPriority");
2863 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2864 MutexLocker ml(Threads_lock);
2865 oop java_thread = JNIHandles::resolve_non_null(jthread);
2866 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2867 JavaThread* thr = java_lang_Thread::thread(java_thread);
2868 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2869 Thread::set_priority(thr, (ThreadPriority)prio);
2870 }
2871 JVM_END
2872
2873
2874 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2875 JVMWrapper("JVM_Yield");
2876 if (os::dont_yield()) return;
2877 #ifndef USDT2
2878 HS_DTRACE_PROBE0(hotspot, thread__yield);
2879 #else /* USDT2 */
2880 HOTSPOT_THREAD_YIELD();
2881 #endif /* USDT2 */
2882 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2883 // Critical for similar threading behaviour
2884 if (ConvertYieldToSleep) {
2885 os::sleep(thread, MinSleepInterval, false);
2886 } else {
2887 os::yield();
2888 }
2889 JVM_END
2890
2891
2892 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2893 JVMWrapper("JVM_Sleep");
2894
2895 if (millis < 0) {
2896 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2897 }
2898
2899 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2900 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2901 }
2902
2903 // Save current thread state and restore it at the end of this block.
2904 // And set new thread state to SLEEPING.
2905 JavaThreadSleepState jtss(thread);
2906
2907 #ifndef USDT2
2908 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2909 #else /* USDT2 */
2910 HOTSPOT_THREAD_SLEEP_BEGIN(
2911 millis);
2912 #endif /* USDT2 */
2913
2914 if (millis == 0) {
2915 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2916 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2917 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2918 // for SOLARIS
2919 if (ConvertSleepToYield) {
2920 os::yield();
2921 } else {
2922 ThreadState old_state = thread->osthread()->get_state();
2923 thread->osthread()->set_state(SLEEPING);
2924 os::sleep(thread, MinSleepInterval, false);
2925 thread->osthread()->set_state(old_state);
2926 }
2927 } else {
2928 ThreadState old_state = thread->osthread()->get_state();
2929 thread->osthread()->set_state(SLEEPING);
2930 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2931 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2932 // us while we were sleeping. We do not overwrite those.
2933 if (!HAS_PENDING_EXCEPTION) {
2934 #ifndef USDT2
2935 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2936 #else /* USDT2 */
2937 HOTSPOT_THREAD_SLEEP_END(
2938 1);
2939 #endif /* USDT2 */
2940 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2941 // to properly restore the thread state. That's likely wrong.
2942 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2943 }
2944 }
2945 thread->osthread()->set_state(old_state);
2946 }
2947 #ifndef USDT2
2948 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2949 #else /* USDT2 */
2950 HOTSPOT_THREAD_SLEEP_END(
2951 0);
2952 #endif /* USDT2 */
2953 JVM_END
2954
2955 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2956 JVMWrapper("JVM_CurrentThread");
2957 oop jthread = thread->threadObj();
2958 assert (thread != NULL, "no current thread!");
2959 return JNIHandles::make_local(env, jthread);
2960 JVM_END
2961
2962
2963 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2964 JVMWrapper("JVM_CountStackFrames");
2965
2966 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2967 oop java_thread = JNIHandles::resolve_non_null(jthread);
2968 bool throw_illegal_thread_state = false;
2969 int count = 0;
2970
2971 {
2972 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2973 // We need to re-resolve the java_thread, since a GC might have happened during the
2974 // acquire of the lock
2975 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2976
2977 if (thr == NULL) {
2978 // do nothing
2979 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2980 // Check whether this java thread has been suspended already. If not, throws
2981 // IllegalThreadStateException. We defer to throw that exception until
2982 // Threads_lock is released since loading exception class has to leave VM.
2983 // The correct way to test a thread is actually suspended is
2984 // wait_for_ext_suspend_completion(), but we can't call that while holding
2985 // the Threads_lock. The above tests are sufficient for our purposes
2986 // provided the walkability of the stack is stable - which it isn't
2987 // 100% but close enough for most practical purposes.
2988 throw_illegal_thread_state = true;
2989 } else {
2990 // Count all java activation, i.e., number of vframes
2991 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2992 // Native frames are not counted
2993 if (!vfst.method()->is_native()) count++;
2994 }
2995 }
2996 }
2997
2998 if (throw_illegal_thread_state) {
2999 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3000 "this thread is not suspended");
3001 }
3002 return count;
3003 JVM_END
3004
3005 // Consider: A better way to implement JVM_Interrupt() is to acquire
3006 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3007 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3008 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3009 // outside the critical section. Threads_lock is hot so we want to minimize
3010 // the hold-time. A cleaner interface would be to decompose interrupt into
3011 // two steps. The 1st phase, performed under Threads_lock, would return
3012 // a closure that'd be invoked after Threads_lock was dropped.
3013 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3014 // admit spurious wakeups.
3015
3016 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3017 JVMWrapper("JVM_Interrupt");
3018
3019 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3020 oop java_thread = JNIHandles::resolve_non_null(jthread);
3021 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3022 // We need to re-resolve the java_thread, since a GC might have happened during the
3023 // acquire of the lock
3024 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3025 if (thr != NULL) {
3026 Thread::interrupt(thr);
3027 }
3028 JVM_END
3029
3030
3031 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3032 JVMWrapper("JVM_IsInterrupted");
3033
3034 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3035 oop java_thread = JNIHandles::resolve_non_null(jthread);
3036 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3037 // We need to re-resolve the java_thread, since a GC might have happened during the
3038 // acquire of the lock
3039 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3040 if (thr == NULL) {
3041 return JNI_FALSE;
3042 } else {
3043 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3044 }
3045 JVM_END
3046
3047
3048 // Return true iff the current thread has locked the object passed in
3049
3050 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3051 JVMWrapper("JVM_HoldsLock");
3052 assert(THREAD->is_Java_thread(), "sanity check");
3053 if (obj == NULL) {
3054 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3055 }
3056 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3057 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3058 JVM_END
3059
3060
3061 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3062 JVMWrapper("JVM_DumpAllStacks");
3063 VM_PrintThreads op;
3064 VMThread::execute(&op);
3065 if (JvmtiExport::should_post_data_dump()) {
3066 JvmtiExport::post_data_dump();
3067 }
3068 JVM_END
3069
3070 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3071 JVMWrapper("JVM_SetNativeThreadName");
3072 ResourceMark rm(THREAD);
3073 oop java_thread = JNIHandles::resolve_non_null(jthread);
3074 JavaThread* thr = java_lang_Thread::thread(java_thread);
3075 // Thread naming only supported for the current thread, doesn't work for
3076 // target threads.
3077 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3078 // we don't set the name of an attached thread to avoid stepping
3079 // on other programs
3080 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3081 os::set_native_thread_name(thread_name);
3082 }
3083 JVM_END
3084
3085 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3086
3087 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3088 assert(jthread->is_Java_thread(), "must be a Java thread");
3089 if (jthread->privileged_stack_top() == NULL) return false;
3090 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3091 oop loader = jthread->privileged_stack_top()->class_loader();
3092 if (loader == NULL) return true;
3093 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3094 if (trusted) return true;
3095 }
3096 return false;
3097 }
3098
3099 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3100 JVMWrapper("JVM_CurrentLoadedClass");
3101 ResourceMark rm(THREAD);
3102
3103 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3104 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3105 bool trusted = is_trusted_frame(thread, &vfst);
3106 if (trusted) return NULL;
3107
3108 Method* m = vfst.method();
3109 if (!m->is_native()) {
3110 InstanceKlass* holder = m->method_holder();
3111 oop loader = holder->class_loader();
3112 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3113 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3114 }
3115 }
3116 }
3117 return NULL;
3118 JVM_END
3119
3120
3121 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3122 JVMWrapper("JVM_CurrentClassLoader");
3123 ResourceMark rm(THREAD);
3124
3125 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3126
3127 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3128 bool trusted = is_trusted_frame(thread, &vfst);
3129 if (trusted) return NULL;
3130
3131 Method* m = vfst.method();
3132 if (!m->is_native()) {
3133 InstanceKlass* holder = m->method_holder();
3134 assert(holder->is_klass(), "just checking");
3135 oop loader = holder->class_loader();
3136 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3137 return JNIHandles::make_local(env, loader);
3138 }
3139 }
3140 }
3141 return NULL;
3142 JVM_END
3143
3144
3145 // Utility object for collecting method holders walking down the stack
3146 class KlassLink: public ResourceObj {
3147 public:
3148 KlassHandle klass;
3149 KlassLink* next;
3150
3151 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3152 };
3153
3154
3155 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3156 JVMWrapper("JVM_GetClassContext");
3157 ResourceMark rm(THREAD);
3158 JvmtiVMObjectAllocEventCollector oam;
3159 // Collect linked list of (handles to) method holders
3160 KlassLink* first = NULL;
3161 KlassLink* last = NULL;
3162 int depth = 0;
3163
3164 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3165 // Native frames are not returned
3166 if (!vfst.method()->is_native()) {
3167 Klass* holder = vfst.method()->method_holder();
3168 assert(holder->is_klass(), "just checking");
3169 depth++;
3170 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3171 if (first == NULL) {
3172 first = last = l;
3173 } else {
3174 last->next = l;
3175 last = l;
3176 }
3177 }
3178 }
3179
3180 // Create result array of type [Ljava/lang/Class;
3181 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3182 // Fill in mirrors corresponding to method holders
3183 int index = 0;
3184 while (first != NULL) {
3185 result->obj_at_put(index++, first->klass()->java_mirror());
3186 first = first->next;
3187 }
3188 assert(index == depth, "just checking");
3189
3190 return (jobjectArray) JNIHandles::make_local(env, result);
3191 JVM_END
3192
3193
3194 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3195 JVMWrapper("JVM_ClassDepth");
3196 ResourceMark rm(THREAD);
3197 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3198 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3199
3200 const char* str = java_lang_String::as_utf8_string(class_name_str());
3201 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3202 if (class_name_sym == NULL) {
3203 return -1;
3204 }
3205
3206 int depth = 0;
3207
3208 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3209 if (!vfst.method()->is_native()) {
3210 InstanceKlass* holder = vfst.method()->method_holder();
3211 assert(holder->is_klass(), "just checking");
3212 if (holder->name() == class_name_sym) {
3213 return depth;
3214 }
3215 depth++;
3216 }
3217 }
3218 return -1;
3219 JVM_END
3220
3221
3222 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3223 JVMWrapper("JVM_ClassLoaderDepth");
3224 ResourceMark rm(THREAD);
3225 int depth = 0;
3226 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3227 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3228 bool trusted = is_trusted_frame(thread, &vfst);
3229 if (trusted) return -1;
3230
3231 Method* m = vfst.method();
3232 if (!m->is_native()) {
3233 InstanceKlass* holder = m->method_holder();
3234 assert(holder->is_klass(), "just checking");
3235 oop loader = holder->class_loader();
3236 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3237 return depth;
3238 }
3239 depth++;
3240 }
3241 }
3242 return -1;
3243 JVM_END
3244
3245
3246 // java.lang.Package ////////////////////////////////////////////////////////////////
3247
3248
3249 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3250 JVMWrapper("JVM_GetSystemPackage");
3251 ResourceMark rm(THREAD);
3252 JvmtiVMObjectAllocEventCollector oam;
3253 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3254 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3255 return (jstring) JNIHandles::make_local(result);
3256 JVM_END
3257
3258
3259 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3260 JVMWrapper("JVM_GetSystemPackages");
3261 JvmtiVMObjectAllocEventCollector oam;
3262 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3263 return (jobjectArray) JNIHandles::make_local(result);
3264 JVM_END
3265
3266
3267 // ObjectInputStream ///////////////////////////////////////////////////////////////
3268
3269 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3270 if (current_class == NULL) {
3271 return true;
3272 }
3273 if ((current_class == field_class) || access.is_public()) {
3274 return true;
3275 }
3276
3277 if (access.is_protected()) {
3278 // See if current_class is a subclass of field_class
3279 if (current_class->is_subclass_of(field_class)) {
3280 return true;
3281 }
3282 }
3283
3284 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3285 }
3286
3287
3288 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3289 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3290 JVMWrapper("JVM_AllocateNewObject");
3291 JvmtiVMObjectAllocEventCollector oam;
3292 // Receiver is not used
3293 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3294 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3295
3296 // Cannot instantiate primitive types
3297 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3298 ResourceMark rm(THREAD);
3299 THROW_0(vmSymbols::java_lang_InvalidClassException());
3300 }
3301
3302 // Arrays not allowed here, must use JVM_AllocateNewArray
3303 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3304 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3305 ResourceMark rm(THREAD);
3306 THROW_0(vmSymbols::java_lang_InvalidClassException());
3307 }
3308
3309 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3310 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3311
3312 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3313
3314 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3315 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3316
3317 // Make sure klass is initialized, since we are about to instantiate one of them.
3318 curr_klass->initialize(CHECK_NULL);
3319
3320 methodHandle m (THREAD,
3321 init_klass->find_method(vmSymbols::object_initializer_name(),
3322 vmSymbols::void_method_signature()));
3323 if (m.is_null()) {
3324 ResourceMark rm(THREAD);
3325 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3326 Method::name_and_sig_as_C_string(init_klass(),
3327 vmSymbols::object_initializer_name(),
3328 vmSymbols::void_method_signature()));
3329 }
3330
3331 if (curr_klass == init_klass && !m->is_public()) {
3332 // Calling the constructor for class 'curr_klass'.
3333 // Only allow calls to a public no-arg constructor.
3334 // This path corresponds to creating an Externalizable object.
3335 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3336 }
3337
3338 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3339 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3340 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3341 }
3342
3343 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3344 // Call constructor m. This might call a constructor higher up in the hierachy
3345 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3346
3347 return JNIHandles::make_local(obj());
3348 JVM_END
3349
3350
3351 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3352 JVMWrapper("JVM_AllocateNewArray");
3353 JvmtiVMObjectAllocEventCollector oam;
3354 oop mirror = JNIHandles::resolve_non_null(currClass);
3355
3356 if (java_lang_Class::is_primitive(mirror)) {
3357 THROW_0(vmSymbols::java_lang_InvalidClassException());
3358 }
3359 Klass* k = java_lang_Class::as_Klass(mirror);
3360 oop result;
3361
3362 if (k->oop_is_typeArray()) {
3363 // typeArray
3364 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3365 } else if (k->oop_is_objArray()) {
3366 // objArray
3367 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3368 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3369 result = oak->allocate(length, CHECK_NULL);
3370 } else {
3371 THROW_0(vmSymbols::java_lang_InvalidClassException());
3372 }
3373 return JNIHandles::make_local(env, result);
3374 JVM_END
3375
3376
3377 // Return the first non-null class loader up the execution stack, or null
3378 // if only code from the null class loader is on the stack.
3379
3380 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3381 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3382 // UseNewReflection
3383 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3384 oop loader = vfst.method()->method_holder()->class_loader();
3385 if (loader != NULL) {
3386 return JNIHandles::make_local(env, loader);
3387 }
3388 }
3389 return NULL;
3390 JVM_END
3391
3392
3393 // Load a class relative to the most recent class on the stack with a non-null
3394 // classloader.
3395 // This function has been deprecated and should not be considered part of the
3396 // specified JVM interface.
3397
3398 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3399 jclass currClass, jstring currClassName))
3400 JVMWrapper("JVM_LoadClass0");
3401 // Receiver is not used
3402 ResourceMark rm(THREAD);
3403
3404 // Class name argument is not guaranteed to be in internal format
3405 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3406 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3407
3408 const char* str = java_lang_String::as_utf8_string(string());
3409
3410 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3411 // It's impossible to create this class; the name cannot fit
3412 // into the constant pool.
3413 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3414 }
3415
3416 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3417 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3418 // Find the most recent class on the stack with a non-null classloader
3419 oop loader = NULL;
3420 oop protection_domain = NULL;
3421 if (curr_klass.is_null()) {
3422 for (vframeStream vfst(thread);
3423 !vfst.at_end() && loader == NULL;
3424 vfst.next()) {
3425 if (!vfst.method()->is_native()) {
3426 InstanceKlass* holder = vfst.method()->method_holder();
3427 loader = holder->class_loader();
3428 protection_domain = holder->protection_domain();
3429 }
3430 }
3431 } else {
3432 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3433 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3434 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3435 }
3436 Handle h_loader(THREAD, loader);
3437 Handle h_prot (THREAD, protection_domain);
3438 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3439 false, thread);
3440 if (TraceClassResolution && result != NULL) {
3441 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3442 }
3443 return result;
3444 JVM_END
3445
3446
3447 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3448
3449
3450 // resolve array handle and check arguments
3451 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3452 if (arr == NULL) {
3453 THROW_0(vmSymbols::java_lang_NullPointerException());
3454 }
3455 oop a = JNIHandles::resolve_non_null(arr);
3456 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3457 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3458 }
3459 return arrayOop(a);
3460 }
3461
3462
3463 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3464 JVMWrapper("JVM_GetArrayLength");
3465 arrayOop a = check_array(env, arr, false, CHECK_0);
3466 return a->length();
3467 JVM_END
3468
3469
3470 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3471 JVMWrapper("JVM_Array_Get");
3472 JvmtiVMObjectAllocEventCollector oam;
3473 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3474 jvalue value;
3475 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3476 oop box = Reflection::box(&value, type, CHECK_NULL);
3477 return JNIHandles::make_local(env, box);
3478 JVM_END
3479
3480
3481 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3482 JVMWrapper("JVM_GetPrimitiveArrayElement");
3483 jvalue value;
3484 value.i = 0; // to initialize value before getting used in CHECK
3485 arrayOop a = check_array(env, arr, true, CHECK_(value));
3486 assert(a->is_typeArray(), "just checking");
3487 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3488 BasicType wide_type = (BasicType) wCode;
3489 if (type != wide_type) {
3490 Reflection::widen(&value, type, wide_type, CHECK_(value));
3491 }
3492 return value;
3493 JVM_END
3494
3495
3496 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3497 JVMWrapper("JVM_SetArrayElement");
3498 arrayOop a = check_array(env, arr, false, CHECK);
3499 oop box = JNIHandles::resolve(val);
3500 jvalue value;
3501 value.i = 0; // to initialize value before getting used in CHECK
3502 BasicType value_type;
3503 if (a->is_objArray()) {
3504 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3505 value_type = Reflection::unbox_for_regular_object(box, &value);
3506 } else {
3507 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3508 }
3509 Reflection::array_set(&value, a, index, value_type, CHECK);
3510 JVM_END
3511
3512
3513 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3514 JVMWrapper("JVM_SetPrimitiveArrayElement");
3515 arrayOop a = check_array(env, arr, true, CHECK);
3516 assert(a->is_typeArray(), "just checking");
3517 BasicType value_type = (BasicType) vCode;
3518 Reflection::array_set(&v, a, index, value_type, CHECK);
3519 JVM_END
3520
3521
3522 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3523 JVMWrapper("JVM_NewArray");
3524 JvmtiVMObjectAllocEventCollector oam;
3525 oop element_mirror = JNIHandles::resolve(eltClass);
3526 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3527 return JNIHandles::make_local(env, result);
3528 JVM_END
3529
3530
3531 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3532 JVMWrapper("JVM_NewMultiArray");
3533 JvmtiVMObjectAllocEventCollector oam;
3534 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3535 oop element_mirror = JNIHandles::resolve(eltClass);
3536 assert(dim_array->is_typeArray(), "just checking");
3537 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3538 return JNIHandles::make_local(env, result);
3539 JVM_END
3540
3541
3542 // Networking library support ////////////////////////////////////////////////////////////////////
3543
3544 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3545 JVMWrapper("JVM_InitializeSocketLibrary");
3546 return 0;
3547 JVM_END
3548
3549
3550 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3551 JVMWrapper("JVM_Socket");
3552 return os::socket(domain, type, protocol);
3553 JVM_END
3554
3555
3556 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3557 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3558 //%note jvm_r6
3559 return os::socket_close(fd);
3560 JVM_END
3561
3562
3563 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3564 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3565 //%note jvm_r6
3566 return os::socket_shutdown(fd, howto);
3567 JVM_END
3568
3569
3570 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3571 JVMWrapper2("JVM_Recv (0x%x)", fd);
3572 //%note jvm_r6
3573 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3574 JVM_END
3575
3576
3577 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3578 JVMWrapper2("JVM_Send (0x%x)", fd);
3579 //%note jvm_r6
3580 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3581 JVM_END
3582
3583
3584 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3585 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3586 //%note jvm_r6
3587 return os::timeout(fd, timeout);
3588 JVM_END
3589
3590
3591 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3592 JVMWrapper2("JVM_Listen (0x%x)", fd);
3593 //%note jvm_r6
3594 return os::listen(fd, count);
3595 JVM_END
3596
3597
3598 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3599 JVMWrapper2("JVM_Connect (0x%x)", fd);
3600 //%note jvm_r6
3601 return os::connect(fd, him, (socklen_t)len);
3602 JVM_END
3603
3604
3605 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3606 JVMWrapper2("JVM_Bind (0x%x)", fd);
3607 //%note jvm_r6
3608 return os::bind(fd, him, (socklen_t)len);
3609 JVM_END
3610
3611
3612 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3613 JVMWrapper2("JVM_Accept (0x%x)", fd);
3614 //%note jvm_r6
3615 socklen_t socklen = (socklen_t)(*len);
3616 jint result = os::accept(fd, him, &socklen);
3617 *len = (jint)socklen;
3618 return result;
3619 JVM_END
3620
3621
3622 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3623 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3624 //%note jvm_r6
3625 socklen_t socklen = (socklen_t)(*fromlen);
3626 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3627 *fromlen = (int)socklen;
3628 return result;
3629 JVM_END
3630
3631
3632 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3633 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3634 //%note jvm_r6
3635 socklen_t socklen = (socklen_t)(*len);
3636 jint result = os::get_sock_name(fd, him, &socklen);
3637 *len = (int)socklen;
3638 return result;
3639 JVM_END
3640
3641
3642 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3643 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3644 //%note jvm_r6
3645 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3646 JVM_END
3647
3648
3649 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3650 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3651 //%note jvm_r6
3652 return os::socket_available(fd, pbytes);
3653 JVM_END
3654
3655
3656 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3657 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3658 //%note jvm_r6
3659 socklen_t socklen = (socklen_t)(*optlen);
3660 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3661 *optlen = (int)socklen;
3662 return result;
3663 JVM_END
3664
3665
3666 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3667 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3668 //%note jvm_r6
3669 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3670 JVM_END
3671
3672
3673 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3674 JVMWrapper("JVM_GetHostName");
3675 return os::get_host_name(name, namelen);
3676 JVM_END
3677
3678
3679 // Library support ///////////////////////////////////////////////////////////////////////////
3680
3681 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3682 //%note jvm_ct
3683 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3684 char ebuf[1024];
3685 void *load_result;
3686 {
3687 ThreadToNativeFromVM ttnfvm(thread);
3688 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3689 }
3690 if (load_result == NULL) {
3691 char msg[1024];
3692 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3693 // Since 'ebuf' may contain a string encoded using
3694 // platform encoding scheme, we need to pass
3695 // Exceptions::unsafe_to_utf8 to the new_exception method
3696 // as the last argument. See bug 6367357.
3697 Handle h_exception =
3698 Exceptions::new_exception(thread,
3699 vmSymbols::java_lang_UnsatisfiedLinkError(),
3700 msg, Exceptions::unsafe_to_utf8);
3701
3702 THROW_HANDLE_0(h_exception);
3703 }
3704 return load_result;
3705 JVM_END
3706
3707
3708 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3709 JVMWrapper("JVM_UnloadLibrary");
3710 os::dll_unload(handle);
3711 JVM_END
3712
3713
3714 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3715 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3716 return os::dll_lookup(handle, name);
3717 JVM_END
3718
3719
3720 // Floating point support ////////////////////////////////////////////////////////////////////
3721
3722 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3723 JVMWrapper("JVM_IsNaN");
3724 return g_isnan(a);
3725 JVM_END
3726
3727
3728 // JNI version ///////////////////////////////////////////////////////////////////////////////
3729
3730 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3731 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3732 return Threads::is_supported_jni_version_including_1_1(version);
3733 JVM_END
3734
3735
3736 // String support ///////////////////////////////////////////////////////////////////////////
3737
3738 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3739 JVMWrapper("JVM_InternString");
3740 JvmtiVMObjectAllocEventCollector oam;
3741 if (str == NULL) return NULL;
3742 oop string = JNIHandles::resolve_non_null(str);
3743 oop result = StringTable::intern(string, CHECK_NULL);
3744 return (jstring) JNIHandles::make_local(env, result);
3745 JVM_END
3746
3747
3748 // Raw monitor support //////////////////////////////////////////////////////////////////////
3749
3750 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3751 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3752 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3753 // that only works with java threads.
3754
3755
3756 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3757 VM_Exit::block_if_vm_exited();
3758 JVMWrapper("JVM_RawMonitorCreate");
3759 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3760 }
3761
3762
3763 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3764 VM_Exit::block_if_vm_exited();
3765 JVMWrapper("JVM_RawMonitorDestroy");
3766 delete ((Mutex*) mon);
3767 }
3768
3769
3770 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3771 VM_Exit::block_if_vm_exited();
3772 JVMWrapper("JVM_RawMonitorEnter");
3773 ((Mutex*) mon)->jvm_raw_lock();
3774 return 0;
3775 }
3776
3777
3778 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3779 VM_Exit::block_if_vm_exited();
3780 JVMWrapper("JVM_RawMonitorExit");
3781 ((Mutex*) mon)->jvm_raw_unlock();
3782 }
3783
3784
3785 // Support for Serialization
3786
3787 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3788 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3789 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3790 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3791
3792 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3793 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3794 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3795 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3796
3797
3798 void initialize_converter_functions() {
3799 if (JDK_Version::is_gte_jdk14x_version()) {
3800 // These functions only exist for compatibility with 1.3.1 and earlier
3801 return;
3802 }
3803
3804 // called from universe_post_init()
3805 assert(
3806 int_bits_to_float_fn == NULL &&
3807 long_bits_to_double_fn == NULL &&
3808 float_to_int_bits_fn == NULL &&
3809 double_to_long_bits_fn == NULL ,
3810 "initialization done twice"
3811 );
3812 // initialize
3813 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3814 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3815 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3816 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3817 // verify
3818 assert(
3819 int_bits_to_float_fn != NULL &&
3820 long_bits_to_double_fn != NULL &&
3821 float_to_int_bits_fn != NULL &&
3822 double_to_long_bits_fn != NULL ,
3823 "initialization failed"
3824 );
3825 }
3826
3827
3828 // Serialization
3829 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3830 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3831 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3832
3833 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3834 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3835 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3836 oop o = JNIHandles::resolve(obj);
3837
3838 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3839 THROW(vmSymbols::java_lang_NullPointerException());
3840 }
3841
3842 jsize nfids = fids->length();
3843 if (nfids == 0) return;
3844
3845 if (tcodes->length() < nfids) {
3846 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3847 }
3848
3849 jsize off = 0;
3850 /* loop through fields, setting values */
3851 for (jsize i = 0; i < nfids; i++) {
3852 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3853 int field_offset;
3854 if (fid != NULL) {
3855 // NULL is a legal value for fid, but retrieving the field offset
3856 // trigger assertion in that case
3857 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3858 }
3859
3860 switch (tcodes->char_at(i)) {
3861 case 'Z':
3862 if (fid != NULL) {
3863 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3864 o->bool_field_put(field_offset, val);
3865 }
3866 off++;
3867 break;
3868
3869 case 'B':
3870 if (fid != NULL) {
3871 o->byte_field_put(field_offset, dbuf->byte_at(off));
3872 }
3873 off++;
3874 break;
3875
3876 case 'C':
3877 if (fid != NULL) {
3878 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3879 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3880 o->char_field_put(field_offset, val);
3881 }
3882 off += 2;
3883 break;
3884
3885 case 'S':
3886 if (fid != NULL) {
3887 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3888 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3889 o->short_field_put(field_offset, val);
3890 }
3891 off += 2;
3892 break;
3893
3894 case 'I':
3895 if (fid != NULL) {
3896 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3897 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3898 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3899 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3900 o->int_field_put(field_offset, ival);
3901 }
3902 off += 4;
3903 break;
3904
3905 case 'F':
3906 if (fid != NULL) {
3907 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3908 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3909 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3910 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3911 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3912 o->float_field_put(field_offset, fval);
3913 }
3914 off += 4;
3915 break;
3916
3917 case 'J':
3918 if (fid != NULL) {
3919 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3920 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3921 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3922 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3923 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3924 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3925 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3926 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3927 o->long_field_put(field_offset, lval);
3928 }
3929 off += 8;
3930 break;
3931
3932 case 'D':
3933 if (fid != NULL) {
3934 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3935 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3936 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3937 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3938 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3939 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3940 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3941 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3942 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3943 o->double_field_put(field_offset, dval);
3944 }
3945 off += 8;
3946 break;
3947
3948 default:
3949 // Illegal typecode
3950 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3951 }
3952 }
3953 JVM_END
3954
3955
3956 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3957 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3958 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3959
3960 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3961 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3962 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3963 oop o = JNIHandles::resolve(obj);
3964
3965 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3966 THROW(vmSymbols::java_lang_NullPointerException());
3967 }
3968
3969 jsize nfids = fids->length();
3970 if (nfids == 0) return;
3971
3972 if (tcodes->length() < nfids) {
3973 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3974 }
3975
3976 /* loop through fields, fetching values */
3977 jsize off = 0;
3978 for (jsize i = 0; i < nfids; i++) {
3979 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3980 if (fid == NULL) {
3981 THROW(vmSymbols::java_lang_NullPointerException());
3982 }
3983 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3984
3985 switch (tcodes->char_at(i)) {
3986 case 'Z':
3987 {
3988 jboolean val = o->bool_field(field_offset);
3989 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3990 }
3991 break;
3992
3993 case 'B':
3994 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3995 break;
3996
3997 case 'C':
3998 {
3999 jchar val = o->char_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 'S':
4006 {
4007 jshort val = o->short_field(field_offset);
4008 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4009 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4010 }
4011 break;
4012
4013 case 'I':
4014 {
4015 jint val = o->int_field(field_offset);
4016 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4017 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4018 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4019 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4020 }
4021 break;
4022
4023 case 'F':
4024 {
4025 jfloat fval = o->float_field(field_offset);
4026 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4027 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4028 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4029 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4030 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4031 }
4032 break;
4033
4034 case 'J':
4035 {
4036 jlong val = o->long_field(field_offset);
4037 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4038 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4039 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4040 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4041 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4042 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4043 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4044 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4045 }
4046 break;
4047
4048 case 'D':
4049 {
4050 jdouble dval = o->double_field(field_offset);
4051 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4052 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4053 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4054 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4055 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4056 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4057 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4058 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4059 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4060 }
4061 break;
4062
4063 default:
4064 // Illegal typecode
4065 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4066 }
4067 }
4068 JVM_END
4069
4070
4071 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4072
4073 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4074 // Security Note:
4075 // The Java level wrapper will perform the necessary security check allowing
4076 // us to pass the NULL as the initiating class loader.
4077 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4078
4079 KlassHandle klass_handle(THREAD, klass);
4080 // Check if we should initialize the class
4081 if (init && klass_handle->oop_is_instance()) {
4082 klass_handle->initialize(CHECK_NULL);
4083 }
4084 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4085 }
4086
4087
4088 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4089
4090 #ifndef PRODUCT
4091
4092 extern "C" {
4093 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4094 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4095 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4096 }
4097
4098 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4099 JVMWrapper("JVM_AccessBoolVMFlag");
4100 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4101 JVM_END
4102
4103 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4104 JVMWrapper("JVM_AccessVMIntFlag");
4105 intx v;
4106 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4107 *value = (jint)v;
4108 return result;
4109 JVM_END
4110
4111
4112 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4113 JVMWrapper("JVM_VMBreakPoint");
4114 oop the_obj = JNIHandles::resolve(obj);
4115 BREAKPOINT;
4116 JVM_END
4117
4118
4119 #endif
4120
4121
4122 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4123
4124 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4125 JVMWrapper("JVM_InvokeMethod");
4126 Handle method_handle;
4127 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4128 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4129 Handle receiver(THREAD, JNIHandles::resolve(obj));
4130 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4131 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4132 jobject res = JNIHandles::make_local(env, result);
4133 if (JvmtiExport::should_post_vm_object_alloc()) {
4134 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4135 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4136 if (java_lang_Class::is_primitive(ret_type)) {
4137 // Only for primitive type vm allocates memory for java object.
4138 // See box() method.
4139 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4140 }
4141 }
4142 return res;
4143 } else {
4144 THROW_0(vmSymbols::java_lang_StackOverflowError());
4145 }
4146 JVM_END
4147
4148
4149 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4150 JVMWrapper("JVM_NewInstanceFromConstructor");
4151 oop constructor_mirror = JNIHandles::resolve(c);
4152 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4153 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4154 jobject res = JNIHandles::make_local(env, result);
4155 if (JvmtiExport::should_post_vm_object_alloc()) {
4156 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4157 }
4158 return res;
4159 JVM_END
4160
4161 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4162
4163 JVM_LEAF(jboolean, JVM_SupportsCX8())
4164 JVMWrapper("JVM_SupportsCX8");
4165 return VM_Version::supports_cx8();
4166 JVM_END
4167
4168
4169 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4170 JVMWrapper("JVM_CX8Field");
4171 jlong res;
4172 oop o = JNIHandles::resolve(obj);
4173 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4174 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4175
4176 assert(VM_Version::supports_cx8(), "cx8 not supported");
4177 res = Atomic::cmpxchg(newVal, addr, oldVal);
4178
4179 return res == oldVal;
4180 JVM_END
4181
4182 // DTrace ///////////////////////////////////////////////////////////////////
4183
4184 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4185 JVMWrapper("JVM_DTraceGetVersion");
4186 return (jint)JVM_TRACING_DTRACE_VERSION;
4187 JVM_END
4188
4189 JVM_ENTRY(jlong,JVM_DTraceActivate(
4190 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4191 JVM_DTraceProvider* providers))
4192 JVMWrapper("JVM_DTraceActivate");
4193 return DTraceJSDT::activate(
4194 version, module_name, providers_count, providers, CHECK_0);
4195 JVM_END
4196
4197 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4198 JVMWrapper("JVM_DTraceIsProbeEnabled");
4199 return DTraceJSDT::is_probe_enabled(method);
4200 JVM_END
4201
4202 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4203 JVMWrapper("JVM_DTraceDispose");
4204 DTraceJSDT::dispose(handle);
4205 JVM_END
4206
4207 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4208 JVMWrapper("JVM_DTraceIsSupported");
4209 return DTraceJSDT::is_supported();
4210 JVM_END
4211
4212 // Returns an array of all live Thread objects (VM internal JavaThreads,
4213 // jvmti agent threads, and JNI attaching threads are skipped)
4214 // See CR 6404306 regarding JNI attaching threads
4215 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4216 ResourceMark rm(THREAD);
4217 ThreadsListEnumerator tle(THREAD, false, false);
4218 JvmtiVMObjectAllocEventCollector oam;
4219
4220 int num_threads = tle.num_threads();
4221 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4222 objArrayHandle threads_ah(THREAD, r);
4223
4224 for (int i = 0; i < num_threads; i++) {
4225 Handle h = tle.get_threadObj(i);
4226 threads_ah->obj_at_put(i, h());
4227 }
4228
4229 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4230 JVM_END
4231
4232
4233 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4234 // Return StackTraceElement[][], each element is the stack trace of a thread in
4235 // the corresponding entry in the given threads array
4236 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4237 JVMWrapper("JVM_DumpThreads");
4238 JvmtiVMObjectAllocEventCollector oam;
4239
4240 // Check if threads is null
4241 if (threads == NULL) {
4242 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4243 }
4244
4245 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4246 objArrayHandle ah(THREAD, a);
4247 int num_threads = ah->length();
4248 // check if threads is non-empty array
4249 if (num_threads == 0) {
4250 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4251 }
4252
4253 // check if threads is not an array of objects of Thread class
4254 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4255 if (k != SystemDictionary::Thread_klass()) {
4256 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4257 }
4258
4259 ResourceMark rm(THREAD);
4260
4261 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4262 for (int i = 0; i < num_threads; i++) {
4263 oop thread_obj = ah->obj_at(i);
4264 instanceHandle h(THREAD, (instanceOop) thread_obj);
4265 thread_handle_array->append(h);
4266 }
4267
4268 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4269 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4270
4271 JVM_END
4272
4273 // JVM monitoring and management support
4274 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4275 return Management::get_jmm_interface(version);
4276 JVM_END
4277
4278 // com.sun.tools.attach.VirtualMachine agent properties support
4279 //
4280 // Initialize the agent properties with the properties maintained in the VM
4281 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4282 JVMWrapper("JVM_InitAgentProperties");
4283 ResourceMark rm;
4284
4285 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4286
4287 PUTPROP(props, "sun.java.command", Arguments::java_command());
4288 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4289 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4290 return properties;
4291 JVM_END
4292
4293 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4294 {
4295 JVMWrapper("JVM_GetEnclosingMethodInfo");
4296 JvmtiVMObjectAllocEventCollector oam;
4297
4298 if (ofClass == NULL) {
4299 return NULL;
4300 }
4301 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4302 // Special handling for primitive objects
4303 if (java_lang_Class::is_primitive(mirror())) {
4304 return NULL;
4305 }
4306 Klass* k = java_lang_Class::as_Klass(mirror());
4307 if (!k->oop_is_instance()) {
4308 return NULL;
4309 }
4310 instanceKlassHandle ik_h(THREAD, k);
4311 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4312 if (encl_method_class_idx == 0) {
4313 return NULL;
4314 }
4315 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4316 objArrayHandle dest(THREAD, dest_o);
4317 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4318 dest->obj_at_put(0, enc_k->java_mirror());
4319 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4320 if (encl_method_method_idx != 0) {
4321 Symbol* sym = ik_h->constants()->symbol_at(
4322 extract_low_short_from_int(
4323 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4324 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4325 dest->obj_at_put(1, str());
4326 sym = ik_h->constants()->symbol_at(
4327 extract_high_short_from_int(
4328 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4329 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4330 dest->obj_at_put(2, str());
4331 }
4332 return (jobjectArray) JNIHandles::make_local(dest());
4333 }
4334 JVM_END
4335
4336 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4337 jint javaThreadState))
4338 {
4339 // If new thread states are added in future JDK and VM versions,
4340 // this should check if the JDK version is compatible with thread
4341 // states supported by the VM. Return NULL if not compatible.
4342 //
4343 // This function must map the VM java_lang_Thread::ThreadStatus
4344 // to the Java thread state that the JDK supports.
4345 //
4346
4347 typeArrayHandle values_h;
4348 switch (javaThreadState) {
4349 case JAVA_THREAD_STATE_NEW : {
4350 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4351 values_h = typeArrayHandle(THREAD, r);
4352 values_h->int_at_put(0, java_lang_Thread::NEW);
4353 break;
4354 }
4355 case JAVA_THREAD_STATE_RUNNABLE : {
4356 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4357 values_h = typeArrayHandle(THREAD, r);
4358 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4359 break;
4360 }
4361 case JAVA_THREAD_STATE_BLOCKED : {
4362 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4363 values_h = typeArrayHandle(THREAD, r);
4364 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4365 break;
4366 }
4367 case JAVA_THREAD_STATE_WAITING : {
4368 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4369 values_h = typeArrayHandle(THREAD, r);
4370 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4371 values_h->int_at_put(1, java_lang_Thread::PARKED);
4372 break;
4373 }
4374 case JAVA_THREAD_STATE_TIMED_WAITING : {
4375 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4376 values_h = typeArrayHandle(THREAD, r);
4377 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4378 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4379 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4380 break;
4381 }
4382 case JAVA_THREAD_STATE_TERMINATED : {
4383 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4384 values_h = typeArrayHandle(THREAD, r);
4385 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4386 break;
4387 }
4388 default:
4389 // Unknown state - probably incompatible JDK version
4390 return NULL;
4391 }
4392
4393 return (jintArray) JNIHandles::make_local(env, values_h());
4394 }
4395 JVM_END
4396
4397
4398 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4399 jint javaThreadState,
4400 jintArray values))
4401 {
4402 // If new thread states are added in future JDK and VM versions,
4403 // this should check if the JDK version is compatible with thread
4404 // states supported by the VM. Return NULL if not compatible.
4405 //
4406 // This function must map the VM java_lang_Thread::ThreadStatus
4407 // to the Java thread state that the JDK supports.
4408 //
4409
4410 ResourceMark rm;
4411
4412 // Check if threads is null
4413 if (values == NULL) {
4414 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4415 }
4416
4417 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4418 typeArrayHandle values_h(THREAD, v);
4419
4420 objArrayHandle names_h;
4421 switch (javaThreadState) {
4422 case JAVA_THREAD_STATE_NEW : {
4423 assert(values_h->length() == 1 &&
4424 values_h->int_at(0) == java_lang_Thread::NEW,
4425 "Invalid threadStatus value");
4426
4427 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4428 1, /* only 1 substate */
4429 CHECK_NULL);
4430 names_h = objArrayHandle(THREAD, r);
4431 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4432 names_h->obj_at_put(0, name());
4433 break;
4434 }
4435 case JAVA_THREAD_STATE_RUNNABLE : {
4436 assert(values_h->length() == 1 &&
4437 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4438 "Invalid threadStatus value");
4439
4440 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4441 1, /* only 1 substate */
4442 CHECK_NULL);
4443 names_h = objArrayHandle(THREAD, r);
4444 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4445 names_h->obj_at_put(0, name());
4446 break;
4447 }
4448 case JAVA_THREAD_STATE_BLOCKED : {
4449 assert(values_h->length() == 1 &&
4450 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4451 "Invalid threadStatus value");
4452
4453 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4454 1, /* only 1 substate */
4455 CHECK_NULL);
4456 names_h = objArrayHandle(THREAD, r);
4457 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4458 names_h->obj_at_put(0, name());
4459 break;
4460 }
4461 case JAVA_THREAD_STATE_WAITING : {
4462 assert(values_h->length() == 2 &&
4463 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4464 values_h->int_at(1) == java_lang_Thread::PARKED,
4465 "Invalid threadStatus value");
4466 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4467 2, /* number of substates */
4468 CHECK_NULL);
4469 names_h = objArrayHandle(THREAD, r);
4470 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4471 CHECK_NULL);
4472 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4473 CHECK_NULL);
4474 names_h->obj_at_put(0, name0());
4475 names_h->obj_at_put(1, name1());
4476 break;
4477 }
4478 case JAVA_THREAD_STATE_TIMED_WAITING : {
4479 assert(values_h->length() == 3 &&
4480 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4481 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4482 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4483 "Invalid threadStatus value");
4484 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4485 3, /* number of substates */
4486 CHECK_NULL);
4487 names_h = objArrayHandle(THREAD, r);
4488 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4489 CHECK_NULL);
4490 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4491 CHECK_NULL);
4492 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4493 CHECK_NULL);
4494 names_h->obj_at_put(0, name0());
4495 names_h->obj_at_put(1, name1());
4496 names_h->obj_at_put(2, name2());
4497 break;
4498 }
4499 case JAVA_THREAD_STATE_TERMINATED : {
4500 assert(values_h->length() == 1 &&
4501 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4502 "Invalid threadStatus value");
4503 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4504 1, /* only 1 substate */
4505 CHECK_NULL);
4506 names_h = objArrayHandle(THREAD, r);
4507 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4508 names_h->obj_at_put(0, name());
4509 break;
4510 }
4511 default:
4512 // Unknown state - probably incompatible JDK version
4513 return NULL;
4514 }
4515 return (jobjectArray) JNIHandles::make_local(env, names_h());
4516 }
4517 JVM_END
4518
4519 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4520 {
4521 memset(info, 0, sizeof(info_size));
4522
4523 info->jvm_version = Abstract_VM_Version::jvm_version();
4524 info->update_version = 0; /* 0 in HotSpot Express VM */
4525 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4526
4527 // when we add a new capability in the jvm_version_info struct, we should also
4528 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4529 // counter defined in runtimeService.cpp.
4530 info->is_attachable = AttachListener::is_attach_supported();
4531 }
4532 JVM_END