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/methodOop.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 "trace/tracing.hpp"
62 #include "utilities/copy.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/top.hpp"
68 #include "utilities/utf8.hpp"
69 #ifdef TARGET_OS_FAMILY_linux
70 # include "jvm_linux.h"
71 #endif
72 #ifdef TARGET_OS_FAMILY_solaris
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "jvm_windows.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_bsd
79 # include "jvm_bsd.h"
80 #endif
81
82 #include <errno.h>
83
84 #ifndef USDT2
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
88 #endif /* !USDT2 */
89
90 /*
91 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
92 such ctors and calls MUST NOT come between an oop declaration/init and its
93 usage because if objects are move this may cause various memory stomps, bus
94 errors and segfaults. Here is a cookbook for causing so called "naked oop
95 failures":
96
97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
98 JVMWrapper("JVM_GetClassDeclaredFields");
99
100 // Object address to be held directly in mirror & not visible to GC
101 oop mirror = JNIHandles::resolve_non_null(ofClass);
102
103 // If this ctor can hit a safepoint, moving objects around, then
104 ComplexConstructor foo;
105
106 // Boom! mirror may point to JUNK instead of the intended object
107 (some dereference of mirror)
108
109 // Here's another call that may block for GC, making mirror stale
110 MutexLocker ml(some_lock);
111
112 // And here's an initializer that can result in a stale oop
113 // all in one step.
114 oop o = call_that_can_throw_exception(TRAPS);
115
116
117 The solution is to keep the oop declaration BELOW the ctor or function
118 call that might cause a GC, do another resolve to reassign the oop, or
119 consider use of a Handle instead of an oop so there is immunity from object
120 motion. But note that the "QUICK" entries below do not have a handlemark
121 and thus can only support use of handles passed in.
122 */
123
124 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
125 ResourceMark rm;
126 int line_number = -1;
127 const char * source_file = NULL;
128 const char * trace = "explicit";
129 klassOop caller = NULL;
130 JavaThread* jthread = JavaThread::current();
131 if (jthread->has_last_Java_frame()) {
132 vframeStream vfst(jthread);
133
134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
136 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
138 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
139
140 methodOop last_caller = NULL;
141
142 while (!vfst.at_end()) {
143 methodOop m = vfst.method();
144 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
145 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
146 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
147 break;
148 }
149 last_caller = m;
150 vfst.next();
151 }
152 // if this is called from Class.forName0 and that is called from Class.forName,
153 // then print the caller of Class.forName. If this is Class.loadClass, then print
154 // that caller, otherwise keep quiet since this should be picked up elsewhere.
155 bool found_it = false;
156 if (!vfst.at_end() &&
157 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName0_name()) {
159 vfst.next();
160 if (!vfst.at_end() &&
161 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName_name()) {
163 vfst.next();
164 found_it = true;
165 }
166 } else if (last_caller != NULL &&
167 instanceKlass::cast(last_caller->method_holder())->name() ==
168 vmSymbols::java_lang_ClassLoader() &&
169 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
170 last_caller->name() == vmSymbols::loadClass_name())) {
171 found_it = true;
172 } else if (!vfst.at_end()) {
173 if (vfst.method()->is_native()) {
174 // JNI call
175 found_it = true;
176 }
177 }
178 if (found_it && !vfst.at_end()) {
179 // found the caller
180 caller = vfst.method()->method_holder();
181 line_number = vfst.method()->line_number_from_bci(vfst.bci());
182 if (line_number == -1) {
183 // show method name if it's a native method
184 trace = vfst.method()->name_and_sig_as_C_string();
185 }
186 Symbol* s = instanceKlass::cast(caller)->source_file_name();
187 if (s != NULL) {
188 source_file = s->as_C_string();
189 }
190 }
191 }
192 if (caller != NULL) {
193 if (to_class != caller) {
194 const char * from = Klass::cast(caller)->external_name();
195 const char * to = Klass::cast(to_class)->external_name();
196 // print in a single call to reduce interleaving between threads
197 if (source_file != NULL) {
198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
199 } else {
200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
201 }
202 }
203 }
204 }
205
206 void trace_class_resolution(klassOop to_class) {
207 EXCEPTION_MARK;
208 trace_class_resolution_impl(to_class, THREAD);
209 if (HAS_PENDING_EXCEPTION) {
210 CLEAR_PENDING_EXCEPTION;
211 }
212 }
213
214 // Wrapper to trace JVM functions
215
216 #ifdef ASSERT
217 class JVMTraceWrapper : public StackObj {
218 public:
219 JVMTraceWrapper(const char* format, ...) {
220 if (TraceJVMCalls) {
221 va_list ap;
222 va_start(ap, format);
223 tty->print("JVM ");
224 tty->vprint_cr(format, ap);
225 va_end(ap);
226 }
227 }
228 };
229
230 Histogram* JVMHistogram;
231 volatile jint JVMHistogram_lock = 0;
232
233 class JVMHistogramElement : public HistogramElement {
234 public:
235 JVMHistogramElement(const char* name);
236 };
237
238 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
239 _name = elementName;
240 uintx count = 0;
241
242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
244 count +=1;
245 if ( (WarnOnStalledSpinLock > 0)
246 && (count % WarnOnStalledSpinLock == 0)) {
247 warning("JVMHistogram_lock seems to be stalled");
248 }
249 }
250 }
251
252 if(JVMHistogram == NULL)
253 JVMHistogram = new Histogram("JVM Call Counts",100);
254
255 JVMHistogram->add_element(this);
256 Atomic::dec(&JVMHistogram_lock);
257 }
258
259 #define JVMCountWrapper(arg) \
260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
262
263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
267 #else
268 #define JVMWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4)
272 #endif
273
274
275 // Interface version /////////////////////////////////////////////////////////////////////
276
277
278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
279 return JVM_INTERFACE_VERSION;
280 JVM_END
281
282
283 // java.lang.System //////////////////////////////////////////////////////////////////////
284
285
286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
287 JVMWrapper("JVM_CurrentTimeMillis");
288 return os::javaTimeMillis();
289 JVM_END
290
291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_NanoTime");
293 return os::javaTimeNanos();
294 JVM_END
295
296
297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 JVMWrapper("JVM_ArrayCopy");
300 // Check if we have null pointers
301 if (src == NULL || dst == NULL) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
311
312
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
328
329
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
331
332
333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
334 JVMWrapper("JVM_InitProperties");
335 ResourceMark rm;
336
337 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
338
339 // System property list includes both user set via -D option and
340 // jvm system specific properties.
341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
342 PUTPROP(props, p->key(), p->value());
343 }
344
345 // Convert the -XX:MaxDirectMemorySize= command line flag
346 // to the sun.nio.MaxDirectMemorySize property.
347 // Do this after setting user properties to prevent people
348 // from setting the value with a -D option, as requested.
349 {
350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
352 } else {
353 char as_chars[256];
354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
356 }
357 }
358
359 // JVM monitoring and management support
360 // Add the sun.management.compiler property for the compiler's name
361 {
362 #undef CSIZE
363 #if defined(_LP64) || defined(_WIN64)
364 #define CSIZE "64-Bit "
365 #else
366 #define CSIZE
367 #endif // 64bit
368
369 #ifdef TIERED
370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
371 #else
372 #if defined(COMPILER1)
373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
374 #elif defined(COMPILER2)
375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
376 #else
377 const char* compiler_name = "";
378 #endif // compilers
379 #endif // TIERED
380
381 if (*compiler_name != '\0' &&
382 (Arguments::mode() != Arguments::_int)) {
383 PUTPROP(props, "sun.management.compiler", compiler_name);
384 }
385 }
386
387 return properties;
388 JVM_END
389
390
391 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
392
393 extern volatile jint vm_created;
394
395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
396 if (vm_created != 0 && (code == 0)) {
397 // The VM is about to exit. We call back into Java to check whether finalizers should be run
398 Universe::run_finalizers_on_exit();
399 }
400 before_exit(thread);
401 vm_exit(code);
402 JVM_END
403
404
405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
406 before_exit(thread);
407 vm_exit(code);
408 JVM_END
409
410
411 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
412 register_on_exit_function(func);
413 JVM_END
414
415
416 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
417 JVMWrapper("JVM_GC");
418 if (!DisableExplicitGC) {
419 Universe::heap()->collect(GCCause::_java_lang_system_gc);
420 }
421 JVM_END
422
423
424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
425 JVMWrapper("JVM_MaxObjectInspectionAge");
426 return Universe::heap()->millis_since_last_gc();
427 JVM_END
428
429
430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
431 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
432 JVM_END
433
434
435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
436 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
437 JVM_END
438
439 static inline jlong convert_size_t_to_jlong(size_t val) {
440 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
441 NOT_LP64 (return (jlong)val;)
442 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
443 }
444
445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
446 JVMWrapper("JVM_TotalMemory");
447 size_t n = Universe::heap()->capacity();
448 return convert_size_t_to_jlong(n);
449 JVM_END
450
451
452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
453 JVMWrapper("JVM_FreeMemory");
454 CollectedHeap* ch = Universe::heap();
455 size_t n;
456 {
457 MutexLocker x(Heap_lock);
458 n = ch->capacity() - ch->used();
459 }
460 return convert_size_t_to_jlong(n);
461 JVM_END
462
463
464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
465 JVMWrapper("JVM_MaxMemory");
466 size_t n = Universe::heap()->max_capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
469
470
471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
472 JVMWrapper("JVM_ActiveProcessorCount");
473 return os::active_processor_count();
474 JVM_END
475
476
477
478 // java.lang.Throwable //////////////////////////////////////////////////////
479
480
481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
482 JVMWrapper("JVM_FillInStackTrace");
483 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
484 java_lang_Throwable::fill_in_stack_trace(exception);
485 JVM_END
486
487
488 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
489 JVMWrapper("JVM_PrintStackTrace");
490 // Note: This is no longer used in Merlin, but we still support it for compatibility.
491 oop exception = JNIHandles::resolve_non_null(receiver);
492 oop stream = JNIHandles::resolve_non_null(printable);
493 java_lang_Throwable::print_stack_trace(exception, stream);
494 JVM_END
495
496
497 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
498 JVMWrapper("JVM_GetStackTraceDepth");
499 oop exception = JNIHandles::resolve(throwable);
500 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
501 JVM_END
502
503
504 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
505 JVMWrapper("JVM_GetStackTraceElement");
506 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
507 oop exception = JNIHandles::resolve(throwable);
508 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
509 return JNIHandles::make_local(env, element);
510 JVM_END
511
512
513 // java.lang.Object ///////////////////////////////////////////////
514
515
516 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
517 JVMWrapper("JVM_IHashCode");
518 // as implemented in the classic virtual machine; return 0 if object is NULL
519 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
520 JVM_END
521
522
523 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
524 JVMWrapper("JVM_MonitorWait");
525 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
526 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
527 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
528 if (JvmtiExport::should_post_monitor_wait()) {
529 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
530 }
531 ObjectSynchronizer::wait(obj, ms, THREAD);
532 JVM_END
533
534
535 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
536 JVMWrapper("JVM_MonitorNotify");
537 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
538 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
539 ObjectSynchronizer::notify(obj, CHECK);
540 JVM_END
541
542
543 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
544 JVMWrapper("JVM_MonitorNotifyAll");
545 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
546 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
547 ObjectSynchronizer::notifyall(obj, CHECK);
548 JVM_END
549
550
551 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
552 JVMWrapper("JVM_Clone");
553 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
554 const KlassHandle klass (THREAD, obj->klass());
555 JvmtiVMObjectAllocEventCollector oam;
556
557 #ifdef ASSERT
558 // Just checking that the cloneable flag is set correct
559 if (obj->is_javaArray()) {
560 guarantee(klass->is_cloneable(), "all arrays are cloneable");
561 } else {
562 guarantee(obj->is_instance(), "should be instanceOop");
563 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
564 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
565 }
566 #endif
567
568 // Check if class of obj supports the Cloneable interface.
569 // All arrays are considered to be cloneable (See JLS 20.1.5)
570 if (!klass->is_cloneable()) {
571 ResourceMark rm(THREAD);
572 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
573 }
574
575 // Make shallow object copy
576 const int size = obj->size();
577 oop new_obj = NULL;
578 if (obj->is_javaArray()) {
579 const int length = ((arrayOop)obj())->length();
580 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
581 } else {
582 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
583 }
584 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
585 // is modifying a reference field in the clonee, a non-oop-atomic copy might
586 // be suspended in the middle of copying the pointer and end up with parts
587 // of two different pointers in the field. Subsequent dereferences will crash.
588 // 4846409: an oop-copy of objects with long or double fields or arrays of same
589 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
590 // of oops. We know objects are aligned on a minimum of an jlong boundary.
591 // The same is true of StubRoutines::object_copy and the various oop_copy
592 // variants, and of the code generated by the inline_native_clone intrinsic.
593 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
594 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
595 (size_t)align_object_size(size) / HeapWordsPerLong);
596 // Clear the header
597 new_obj->init_mark();
598
599 // Store check (mark entire object and let gc sort it out)
600 BarrierSet* bs = Universe::heap()->barrier_set();
601 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
602 bs->write_region(MemRegion((HeapWord*)new_obj, size));
603
604 // Caution: this involves a java upcall, so the clone should be
605 // "gc-robust" by this stage.
606 if (klass->has_finalizer()) {
607 assert(obj->is_instance(), "should be instanceOop");
608 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
609 }
610
611 return JNIHandles::make_local(env, oop(new_obj));
612 JVM_END
613
614 // java.lang.Compiler ////////////////////////////////////////////////////
615
616 // The initial cuts of the HotSpot VM will not support JITs, and all existing
617 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
618 // functions are all silently ignored unless JVM warnings are printed.
619
620 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
621 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
622 JVM_END
623
624
625 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
626 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
627 return JNI_FALSE;
628 JVM_END
629
630
631 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
632 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
633 return JNI_FALSE;
634 JVM_END
635
636
637 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
638 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
639 return JNI_FALSE;
640 JVM_END
641
642
643 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
644 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
645 return NULL;
646 JVM_END
647
648
649 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
650 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
651 JVM_END
652
653
654 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
655 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
656 JVM_END
657
658
659
660 // Error message support //////////////////////////////////////////////////////
661
662 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
663 JVMWrapper("JVM_GetLastErrorString");
664 return (jint)os::lasterror(buf, len);
665 JVM_END
666
667
668 // java.io.File ///////////////////////////////////////////////////////////////
669
670 JVM_LEAF(char*, JVM_NativePath(char* path))
671 JVMWrapper2("JVM_NativePath (%s)", path);
672 return os::native_path(path);
673 JVM_END
674
675
676 // Misc. class handling ///////////////////////////////////////////////////////////
677
678
679 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
680 JVMWrapper("JVM_GetCallerClass");
681 klassOop k = thread->security_get_caller_class(depth);
682 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
683 JVM_END
684
685
686 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
687 JVMWrapper("JVM_FindPrimitiveClass");
688 oop mirror = NULL;
689 BasicType t = name2type(utf);
690 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
691 mirror = Universe::java_mirror(t);
692 }
693 if (mirror == NULL) {
694 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
695 } else {
696 return (jclass) JNIHandles::make_local(env, mirror);
697 }
698 JVM_END
699
700
701 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
702 JVMWrapper("JVM_ResolveClass");
703 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
704 JVM_END
705
706
707 // Returns a class loaded by the bootstrap class loader; or null
708 // if not found. ClassNotFoundException is not thrown.
709 //
710 // Rationale behind JVM_FindClassFromBootLoader
711 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
712 // b> because of (a) java.dll has a direct dependecy on the unexported
713 // private symbol "_JVM_FindClassFromClassLoader@20".
714 // c> the launcher cannot use the private symbol as it dynamically opens
715 // the entry point, so if something changes, the launcher will fail
716 // unexpectedly at runtime, it is safest for the launcher to dlopen a
717 // stable exported interface.
718 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
719 // signature to change from _JVM_FindClassFromClassLoader@20 to
720 // JVM_FindClassFromClassLoader and will not be backward compatible
721 // with older JDKs.
722 // Thus a public/stable exported entry point is the right solution,
723 // public here means public in linker semantics, and is exported only
724 // to the JDK, and is not intended to be a public API.
725
726 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
727 const char* name))
728 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
729
730 // Java libraries should ensure that name is never null...
731 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
732 // It's impossible to create this class; the name cannot fit
733 // into the constant pool.
734 return NULL;
735 }
736
737 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
738 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
739 if (k == NULL) {
740 return NULL;
741 }
742
743 if (TraceClassResolution) {
744 trace_class_resolution(k);
745 }
746 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
747 JVM_END
748
749 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
750 jboolean init, jobject loader,
751 jboolean throwError))
752 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
753 throwError ? "error" : "exception");
754 // Java libraries should ensure that name is never null...
755 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
756 // It's impossible to create this class; the name cannot fit
757 // into the constant pool.
758 if (throwError) {
759 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
760 } else {
761 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
762 }
763 }
764 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
765 Handle h_loader(THREAD, JNIHandles::resolve(loader));
766 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
767 Handle(), throwError, THREAD);
768
769 if (TraceClassResolution && result != NULL) {
770 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
771 }
772 return result;
773 JVM_END
774
775
776 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
777 jboolean init, jclass from))
778 JVMWrapper2("JVM_FindClassFromClass %s", name);
779 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
780 // It's impossible to create this class; the name cannot fit
781 // into the constant pool.
782 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
783 }
784 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
785 oop from_class_oop = JNIHandles::resolve(from);
786 klassOop from_class = (from_class_oop == NULL)
787 ? (klassOop)NULL
788 : java_lang_Class::as_klassOop(from_class_oop);
789 oop class_loader = NULL;
790 oop protection_domain = NULL;
791 if (from_class != NULL) {
792 class_loader = Klass::cast(from_class)->class_loader();
793 protection_domain = Klass::cast(from_class)->protection_domain();
794 }
795 Handle h_loader(THREAD, class_loader);
796 Handle h_prot (THREAD, protection_domain);
797 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
798 h_prot, true, thread);
799
800 if (TraceClassResolution && result != NULL) {
801 // this function is generally only used for class loading during verification.
802 ResourceMark rm;
803 oop from_mirror = JNIHandles::resolve_non_null(from);
804 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
805 const char * from_name = Klass::cast(from_class)->external_name();
806
807 oop mirror = JNIHandles::resolve_non_null(result);
808 klassOop to_class = java_lang_Class::as_klassOop(mirror);
809 const char * to = Klass::cast(to_class)->external_name();
810 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
811 }
812
813 return result;
814 JVM_END
815
816 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
817 if (loader.is_null()) {
818 return;
819 }
820
821 // check whether the current caller thread holds the lock or not.
822 // If not, increment the corresponding counter
823 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
824 ObjectSynchronizer::owner_self) {
825 counter->inc();
826 }
827 }
828
829 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
830 // and JVM_DefineClassWithSourceCond()
831 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
832 jobject loader, const jbyte *buf,
833 jsize len, jobject pd, const char *source,
834 jboolean verify, TRAPS) {
835 if (source == NULL) source = "__JVM_DefineClass__";
836
837 assert(THREAD->is_Java_thread(), "must be a JavaThread");
838 JavaThread* jt = (JavaThread*) THREAD;
839
840 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
841 ClassLoader::perf_define_appclass_selftime(),
842 ClassLoader::perf_define_appclasses(),
843 jt->get_thread_stat()->perf_recursion_counts_addr(),
844 jt->get_thread_stat()->perf_timers_addr(),
845 PerfClassTraceTime::DEFINE_CLASS);
846
847 if (UsePerfData) {
848 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
849 }
850
851 // Since exceptions can be thrown, class initialization can take place
852 // if name is NULL no check for class name in .class stream has to be made.
853 TempNewSymbol class_name = NULL;
854 if (name != NULL) {
855 const int str_len = (int)strlen(name);
856 if (str_len > Symbol::max_length()) {
857 // It's impossible to create this class; the name cannot fit
858 // into the constant pool.
859 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
860 }
861 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
862 }
863
864 ResourceMark rm(THREAD);
865 ClassFileStream st((u1*) buf, len, (char *)source);
866 Handle class_loader (THREAD, JNIHandles::resolve(loader));
867 if (UsePerfData) {
868 is_lock_held_by_thread(class_loader,
869 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
870 THREAD);
871 }
872 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
873 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
874 protection_domain, &st,
875 verify != 0,
876 CHECK_NULL);
877
878 if (TraceClassResolution && k != NULL) {
879 trace_class_resolution(k);
880 }
881
882 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
883 }
884
885
886 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
887 JVMWrapper2("JVM_DefineClass %s", name);
888
889 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
890 JVM_END
891
892
893 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
894 JVMWrapper2("JVM_DefineClassWithSource %s", name);
895
896 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
897 JVM_END
898
899 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
900 jobject loader, const jbyte *buf,
901 jsize len, jobject pd,
902 const char *source, jboolean verify))
903 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
904
905 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
906 JVM_END
907
908 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
909 JVMWrapper("JVM_FindLoadedClass");
910 ResourceMark rm(THREAD);
911
912 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
913 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
914
915 const char* str = java_lang_String::as_utf8_string(string());
916 // Sanity check, don't expect null
917 if (str == NULL) return NULL;
918
919 const int str_len = (int)strlen(str);
920 if (str_len > Symbol::max_length()) {
921 // It's impossible to create this class; the name cannot fit
922 // into the constant pool.
923 return NULL;
924 }
925 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
926
927 // Security Note:
928 // The Java level wrapper will perform the necessary security check allowing
929 // us to pass the NULL as the initiating class loader.
930 Handle h_loader(THREAD, JNIHandles::resolve(loader));
931 if (UsePerfData) {
932 is_lock_held_by_thread(h_loader,
933 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
934 THREAD);
935 }
936
937 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
938 h_loader,
939 Handle(),
940 CHECK_NULL);
941
942 return (k == NULL) ? NULL :
943 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
944 JVM_END
945
946
947 // Reflection support //////////////////////////////////////////////////////////////////////////////
948
949 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
950 assert (cls != NULL, "illegal class");
951 JVMWrapper("JVM_GetClassName");
952 JvmtiVMObjectAllocEventCollector oam;
953 ResourceMark rm(THREAD);
954 const char* name;
955 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
956 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
957 } else {
958 // Consider caching interned string in Klass
959 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
960 assert(k->is_klass(), "just checking");
961 name = Klass::cast(k)->external_name();
962 }
963 oop result = StringTable::intern((char*) name, CHECK_NULL);
964 return (jstring) JNIHandles::make_local(env, result);
965 JVM_END
966
967
968 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
969 JVMWrapper("JVM_GetClassInterfaces");
970 JvmtiVMObjectAllocEventCollector oam;
971 oop mirror = JNIHandles::resolve_non_null(cls);
972
973 // Special handling for primitive objects
974 if (java_lang_Class::is_primitive(mirror)) {
975 // Primitive objects does not have any interfaces
976 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
977 return (jobjectArray) JNIHandles::make_local(env, r);
978 }
979
980 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
981 // Figure size of result array
982 int size;
983 if (klass->oop_is_instance()) {
984 size = instanceKlass::cast(klass())->local_interfaces()->length();
985 } else {
986 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
987 size = 2;
988 }
989
990 // Allocate result array
991 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
992 objArrayHandle result (THREAD, r);
993 // Fill in result
994 if (klass->oop_is_instance()) {
995 // Regular instance klass, fill in all local interfaces
996 for (int index = 0; index < size; index++) {
997 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
998 result->obj_at_put(index, Klass::cast(k)->java_mirror());
999 }
1000 } else {
1001 // All arrays implement java.lang.Cloneable and java.io.Serializable
1002 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
1003 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
1004 }
1005 return (jobjectArray) JNIHandles::make_local(env, result());
1006 JVM_END
1007
1008
1009 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1010 JVMWrapper("JVM_GetClassLoader");
1011 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1012 return NULL;
1013 }
1014 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1015 oop loader = Klass::cast(k)->class_loader();
1016 return JNIHandles::make_local(env, loader);
1017 JVM_END
1018
1019
1020 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1021 JVMWrapper("JVM_IsInterface");
1022 oop mirror = JNIHandles::resolve_non_null(cls);
1023 if (java_lang_Class::is_primitive(mirror)) {
1024 return JNI_FALSE;
1025 }
1026 klassOop k = java_lang_Class::as_klassOop(mirror);
1027 jboolean result = Klass::cast(k)->is_interface();
1028 assert(!result || Klass::cast(k)->oop_is_instance(),
1029 "all interfaces are instance types");
1030 // The compiler intrinsic for isInterface tests the
1031 // Klass::_access_flags bits in the same way.
1032 return result;
1033 JVM_END
1034
1035
1036 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1037 JVMWrapper("JVM_GetClassSigners");
1038 JvmtiVMObjectAllocEventCollector oam;
1039 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1040 // There are no signers for primitive types
1041 return NULL;
1042 }
1043
1044 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1045 objArrayOop signers = NULL;
1046 if (Klass::cast(k)->oop_is_instance()) {
1047 signers = instanceKlass::cast(k)->signers();
1048 }
1049
1050 // If there are no signers set in the class, or if the class
1051 // is an array, return NULL.
1052 if (signers == NULL) return NULL;
1053
1054 // copy of the signers array
1055 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1056 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1057 for (int index = 0; index < signers->length(); index++) {
1058 signers_copy->obj_at_put(index, signers->obj_at(index));
1059 }
1060
1061 // return the copy
1062 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1063 JVM_END
1064
1065
1066 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1067 JVMWrapper("JVM_SetClassSigners");
1068 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1069 // This call is ignored for primitive types and arrays.
1070 // Signers are only set once, ClassLoader.java, and thus shouldn't
1071 // be called with an array. Only the bootstrap loader creates arrays.
1072 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1073 if (Klass::cast(k)->oop_is_instance()) {
1074 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1075 }
1076 }
1077 JVM_END
1078
1079
1080 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1081 JVMWrapper("JVM_GetProtectionDomain");
1082 if (JNIHandles::resolve(cls) == NULL) {
1083 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1084 }
1085
1086 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1087 // Primitive types does not have a protection domain.
1088 return NULL;
1089 }
1090
1091 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1092 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1093 JVM_END
1094
1095
1096 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1097 // still defined in core libraries as of 1.5.
1098 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1099 JVMWrapper("JVM_SetProtectionDomain");
1100 if (JNIHandles::resolve(cls) == NULL) {
1101 THROW(vmSymbols::java_lang_NullPointerException());
1102 }
1103 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1104 // Call is ignored for primitive types
1105 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1106
1107 // cls won't be an array, as this called only from ClassLoader.defineClass
1108 if (Klass::cast(k)->oop_is_instance()) {
1109 oop pd = JNIHandles::resolve(protection_domain);
1110 assert(pd == NULL || pd->is_oop(), "just checking");
1111 instanceKlass::cast(k)->set_protection_domain(pd);
1112 }
1113 }
1114 JVM_END
1115
1116 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1117 // If there is a security manager and protection domain, check the access
1118 // in the protection domain, otherwise it is authorized.
1119 if (java_lang_System::has_security_manager()) {
1120
1121 // For bootstrapping, if pd implies method isn't in the JDK, allow
1122 // this context to revert to older behavior.
1123 // In this case the isAuthorized field in AccessControlContext is also not
1124 // present.
1125 if (Universe::protection_domain_implies_method() == NULL) {
1126 return true;
1127 }
1128
1129 // Whitelist certain access control contexts
1130 if (java_security_AccessControlContext::is_authorized(context)) {
1131 return true;
1132 }
1133
1134 oop prot = klass->protection_domain();
1135 if (prot != NULL) {
1136 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1137 // in the new wrapper.
1138 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1139 Handle h_prot(THREAD, prot);
1140 JavaValue result(T_BOOLEAN);
1141 JavaCallArguments args(h_prot);
1142 JavaCalls::call(&result, m, &args, CHECK_false);
1143 return (result.get_jboolean() != 0);
1144 }
1145 }
1146 return true;
1147 }
1148
1149 // Create an AccessControlContext with a protection domain with null codesource
1150 // and null permissions - which gives no permissions.
1151 oop create_dummy_access_control_context(TRAPS) {
1152 instanceKlassHandle pd_klass (THREAD, SystemDictionary::ProtectionDomain_klass());
1153 // new ProtectionDomain(null,null);
1154 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1155 Handle null_pd(THREAD, null_protection_domain);
1156
1157 // new ProtectionDomain[] {pd};
1158 objArrayOop context = oopFactory::new_objArray(pd_klass(), 1, CHECK_NULL);
1159 context->obj_at_put(0, null_pd());
1160
1161 // new AccessControlContext(new ProtectionDomain[] {pd})
1162 objArrayHandle h_context(THREAD, context);
1163 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1164 return result;
1165 }
1166
1167
1168 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1169 JVMWrapper("JVM_DoPrivileged");
1170
1171 if (action == NULL) {
1172 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1173 }
1174
1175
1176 // Compute the frame initiating the do privileged operation and setup the privileged stack
1177 vframeStream vfst(thread);
1178 vfst.security_get_caller_frame(1);
1179
1180 if (vfst.at_end()) {
1181 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1182 }
1183
1184 methodOop method = vfst.method();
1185 instanceKlassHandle klass (THREAD, method->method_holder());
1186
1187 // Check that action object understands "Object run()"
1188 Handle h_context;
1189 if (context != NULL) {
1190 h_context = Handle(THREAD, JNIHandles::resolve(context));
1191 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1192 if (!authorized) {
1193 // Create an unprivileged access control object and call it's run function
1194 // instead.
1195 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1196 h_context = Handle(THREAD, noprivs);
1197 }
1198 }
1199
1200 // Check that action object understands "Object run()"
1201 Handle object (THREAD, JNIHandles::resolve(action));
1202
1203 // get run() method
1204 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1205 vmSymbols::run_method_name(),
1206 vmSymbols::void_object_signature());
1207 methodHandle m (THREAD, m_oop);
1208 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1209 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1210 }
1211
1212 // Stack allocated list of privileged stack elements
1213 PrivilegedElement pi;
1214
1215 if (!vfst.at_end()) {
1216 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1217 thread->set_privileged_stack_top(&pi);
1218 }
1219
1220
1221 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1222 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1223 Handle pending_exception;
1224 JavaValue result(T_OBJECT);
1225 JavaCallArguments args(object);
1226 JavaCalls::call(&result, m, &args, THREAD);
1227
1228 // done with action, remove ourselves from the list
1229 if (!vfst.at_end()) {
1230 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1231 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1232 }
1233
1234 if (HAS_PENDING_EXCEPTION) {
1235 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1236 CLEAR_PENDING_EXCEPTION;
1237
1238 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1239 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1240 // Throw a java.security.PrivilegedActionException(Exception e) exception
1241 JavaCallArguments args(pending_exception);
1242 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1243 vmSymbols::exception_void_signature(),
1244 &args);
1245 }
1246 }
1247
1248 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1249 return JNIHandles::make_local(env, (oop) result.get_jobject());
1250 JVM_END
1251
1252
1253 // Returns the inherited_access_control_context field of the running thread.
1254 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1255 JVMWrapper("JVM_GetInheritedAccessControlContext");
1256 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1257 return JNIHandles::make_local(env, result);
1258 JVM_END
1259
1260 class RegisterArrayForGC {
1261 private:
1262 JavaThread *_thread;
1263 public:
1264 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1265 _thread = thread;
1266 _thread->register_array_for_gc(array);
1267 }
1268
1269 ~RegisterArrayForGC() {
1270 _thread->register_array_for_gc(NULL);
1271 }
1272 };
1273
1274
1275 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1276 JVMWrapper("JVM_GetStackAccessControlContext");
1277 if (!UsePrivilegedStack) return NULL;
1278
1279 ResourceMark rm(THREAD);
1280 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1281 JvmtiVMObjectAllocEventCollector oam;
1282
1283 // count the protection domains on the execution stack. We collapse
1284 // duplicate consecutive protection domains into a single one, as
1285 // well as stopping when we hit a privileged frame.
1286
1287 // Use vframeStream to iterate through Java frames
1288 vframeStream vfst(thread);
1289
1290 oop previous_protection_domain = NULL;
1291 Handle privileged_context(thread, NULL);
1292 bool is_privileged = false;
1293 oop protection_domain = NULL;
1294
1295 for(; !vfst.at_end(); vfst.next()) {
1296 // get method of frame
1297 methodOop method = vfst.method();
1298 intptr_t* frame_id = vfst.frame_id();
1299
1300 // check the privileged frames to see if we have a match
1301 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1302 // this frame is privileged
1303 is_privileged = true;
1304 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1305 protection_domain = thread->privileged_stack_top()->protection_domain();
1306 } else {
1307 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1308 }
1309
1310 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1311 local_array->push(protection_domain);
1312 previous_protection_domain = protection_domain;
1313 }
1314
1315 if (is_privileged) break;
1316 }
1317
1318
1319 // either all the domains on the stack were system domains, or
1320 // we had a privileged system domain
1321 if (local_array->is_empty()) {
1322 if (is_privileged && privileged_context.is_null()) return NULL;
1323
1324 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1325 return JNIHandles::make_local(env, result);
1326 }
1327
1328 // the resource area must be registered in case of a gc
1329 RegisterArrayForGC ragc(thread, local_array);
1330 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1331 local_array->length(), CHECK_NULL);
1332 objArrayHandle h_context(thread, context);
1333 for (int index = 0; index < local_array->length(); index++) {
1334 h_context->obj_at_put(index, local_array->at(index));
1335 }
1336
1337 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1338
1339 return JNIHandles::make_local(env, result);
1340 JVM_END
1341
1342
1343 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1344 JVMWrapper("JVM_IsArrayClass");
1345 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1346 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1347 JVM_END
1348
1349
1350 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1351 JVMWrapper("JVM_IsPrimitiveClass");
1352 oop mirror = JNIHandles::resolve_non_null(cls);
1353 return (jboolean) java_lang_Class::is_primitive(mirror);
1354 JVM_END
1355
1356
1357 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1358 JVMWrapper("JVM_GetComponentType");
1359 oop mirror = JNIHandles::resolve_non_null(cls);
1360 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1361 return (jclass) JNIHandles::make_local(env, result);
1362 JVM_END
1363
1364
1365 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1366 JVMWrapper("JVM_GetClassModifiers");
1367 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1368 // Primitive type
1369 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1370 }
1371
1372 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1373 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1374 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1375 return k->modifier_flags();
1376 JVM_END
1377
1378
1379 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1380
1381 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1382 JvmtiVMObjectAllocEventCollector oam;
1383 // ofClass is a reference to a java_lang_Class object. The mirror object
1384 // of an instanceKlass
1385
1386 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1387 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1388 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1389 return (jobjectArray)JNIHandles::make_local(env, result);
1390 }
1391
1392 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1393 InnerClassesIterator iter(k);
1394
1395 if (iter.length() == 0) {
1396 // Neither an inner nor outer class
1397 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1398 return (jobjectArray)JNIHandles::make_local(env, result);
1399 }
1400
1401 // find inner class info
1402 constantPoolHandle cp(thread, k->constants());
1403 int length = iter.length();
1404
1405 // Allocate temp. result array
1406 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1407 objArrayHandle result (THREAD, r);
1408 int members = 0;
1409
1410 for (; !iter.done(); iter.next()) {
1411 int ioff = iter.inner_class_info_index();
1412 int ooff = iter.outer_class_info_index();
1413
1414 if (ioff != 0 && ooff != 0) {
1415 // Check to see if the name matches the class we're looking for
1416 // before attempting to find the class.
1417 if (cp->klass_name_at_matches(k, ooff)) {
1418 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1419 if (outer_klass == k()) {
1420 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1421 instanceKlassHandle inner_klass (THREAD, ik);
1422
1423 // Throws an exception if outer klass has not declared k as
1424 // an inner klass
1425 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1426
1427 result->obj_at_put(members, inner_klass->java_mirror());
1428 members++;
1429 }
1430 }
1431 }
1432 }
1433
1434 if (members != length) {
1435 // Return array of right length
1436 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1437 for(int i = 0; i < members; i++) {
1438 res->obj_at_put(i, result->obj_at(i));
1439 }
1440 return (jobjectArray)JNIHandles::make_local(env, res);
1441 }
1442
1443 return (jobjectArray)JNIHandles::make_local(env, result());
1444 JVM_END
1445
1446
1447 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1448 {
1449 // ofClass is a reference to a java_lang_Class object.
1450 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1451 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1452 return NULL;
1453 }
1454
1455 bool inner_is_member = false;
1456 klassOop outer_klass
1457 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1458 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1459 if (outer_klass == NULL) return NULL; // already a top-level class
1460 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1461 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1462 }
1463 JVM_END
1464
1465 // should be in instanceKlass.cpp, but is here for historical reasons
1466 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1467 bool* inner_is_member,
1468 TRAPS) {
1469 Thread* thread = THREAD;
1470 InnerClassesIterator iter(k);
1471 if (iter.length() == 0) {
1472 // No inner class info => no declaring class
1473 return NULL;
1474 }
1475
1476 constantPoolHandle i_cp(thread, k->constants());
1477
1478 bool found = false;
1479 klassOop ok;
1480 instanceKlassHandle outer_klass;
1481 *inner_is_member = false;
1482
1483 // Find inner_klass attribute
1484 for (; !iter.done() && !found; iter.next()) {
1485 int ioff = iter.inner_class_info_index();
1486 int ooff = iter.outer_class_info_index();
1487 int noff = iter.inner_name_index();
1488 if (ioff != 0) {
1489 // Check to see if the name matches the class we're looking for
1490 // before attempting to find the class.
1491 if (i_cp->klass_name_at_matches(k, ioff)) {
1492 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1493 found = (k() == inner_klass);
1494 if (found && ooff != 0) {
1495 ok = i_cp->klass_at(ooff, CHECK_NULL);
1496 outer_klass = instanceKlassHandle(thread, ok);
1497 *inner_is_member = true;
1498 }
1499 }
1500 }
1501 }
1502
1503 if (found && outer_klass.is_null()) {
1504 // It may be anonymous; try for that.
1505 int encl_method_class_idx = k->enclosing_method_class_index();
1506 if (encl_method_class_idx != 0) {
1507 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1508 outer_klass = instanceKlassHandle(thread, ok);
1509 *inner_is_member = false;
1510 }
1511 }
1512
1513 // If no inner class attribute found for this class.
1514 if (outer_klass.is_null()) return NULL;
1515
1516 // Throws an exception if outer klass has not declared k as an inner klass
1517 // We need evidence that each klass knows about the other, or else
1518 // the system could allow a spoof of an inner class to gain access rights.
1519 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1520 return outer_klass();
1521 }
1522
1523 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1524 assert (cls != NULL, "illegal class");
1525 JVMWrapper("JVM_GetClassSignature");
1526 JvmtiVMObjectAllocEventCollector oam;
1527 ResourceMark rm(THREAD);
1528 // Return null for arrays and primatives
1529 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1530 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1531 if (Klass::cast(k)->oop_is_instance()) {
1532 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1533 if (sym == NULL) return NULL;
1534 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1535 return (jstring) JNIHandles::make_local(env, str());
1536 }
1537 }
1538 return NULL;
1539 JVM_END
1540
1541
1542 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1543 assert (cls != NULL, "illegal class");
1544 JVMWrapper("JVM_GetClassAnnotations");
1545 ResourceMark rm(THREAD);
1546 // Return null for arrays and primitives
1547 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1548 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1549 if (Klass::cast(k)->oop_is_instance()) {
1550 return (jbyteArray) JNIHandles::make_local(env,
1551 instanceKlass::cast(k)->class_annotations());
1552 }
1553 }
1554 return NULL;
1555 JVM_END
1556
1557
1558 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1559 assert(field != NULL, "illegal field");
1560 JVMWrapper("JVM_GetFieldAnnotations");
1561
1562 // some of this code was adapted from from jni_FromReflectedField
1563
1564 // field is a handle to a java.lang.reflect.Field object
1565 oop reflected = JNIHandles::resolve_non_null(field);
1566 oop mirror = java_lang_reflect_Field::clazz(reflected);
1567 klassOop k = java_lang_Class::as_klassOop(mirror);
1568 int slot = java_lang_reflect_Field::slot(reflected);
1569 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1570
1571 fieldDescriptor fd;
1572 KlassHandle kh(THREAD, k);
1573 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1574
1575 if (modifiers & JVM_ACC_STATIC) {
1576 // for static fields we only look in the current class
1577 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1578 true, &fd)) {
1579 assert(false, "cannot find static field");
1580 return NULL; // robustness
1581 }
1582 } else {
1583 // for instance fields we start with the current class and work
1584 // our way up through the superclass chain
1585 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1586 &fd)) {
1587 assert(false, "cannot find instance field");
1588 return NULL; // robustness
1589 }
1590 }
1591
1592 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1593 JVM_END
1594
1595
1596 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1597 // some of this code was adapted from from jni_FromReflectedMethod
1598
1599 oop reflected = JNIHandles::resolve_non_null(method);
1600 oop mirror = NULL;
1601 int slot = 0;
1602
1603 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1604 mirror = java_lang_reflect_Constructor::clazz(reflected);
1605 slot = java_lang_reflect_Constructor::slot(reflected);
1606 } else {
1607 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1608 "wrong type");
1609 mirror = java_lang_reflect_Method::clazz(reflected);
1610 slot = java_lang_reflect_Method::slot(reflected);
1611 }
1612 klassOop k = java_lang_Class::as_klassOop(mirror);
1613
1614 KlassHandle kh(THREAD, k);
1615 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1616 if (m == NULL) {
1617 assert(false, "cannot find method");
1618 return NULL; // robustness
1619 }
1620
1621 return m;
1622 }
1623
1624
1625 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1626 JVMWrapper("JVM_GetMethodAnnotations");
1627
1628 // method is a handle to a java.lang.reflect.Method object
1629 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1630 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1631 JVM_END
1632
1633
1634 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1635 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1636
1637 // method is a handle to a java.lang.reflect.Method object
1638 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1639 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1640 JVM_END
1641
1642
1643 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1644 JVMWrapper("JVM_GetMethodParameterAnnotations");
1645
1646 // method is a handle to a java.lang.reflect.Method object
1647 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1648 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1649 JVM_END
1650
1651
1652 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1653
1654 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1655 {
1656 JVMWrapper("JVM_GetClassDeclaredFields");
1657 JvmtiVMObjectAllocEventCollector oam;
1658
1659 // Exclude primitive types and array types
1660 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1661 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1662 // Return empty array
1663 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1664 return (jobjectArray) JNIHandles::make_local(env, res);
1665 }
1666
1667 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1668 constantPoolHandle cp(THREAD, k->constants());
1669
1670 // Ensure class is linked
1671 k->link_class(CHECK_NULL);
1672
1673 // 4496456 We need to filter out java.lang.Throwable.backtrace
1674 bool skip_backtrace = false;
1675
1676 // Allocate result
1677 int num_fields;
1678
1679 if (publicOnly) {
1680 num_fields = 0;
1681 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1682 if (fs.access_flags().is_public()) ++num_fields;
1683 }
1684 } else {
1685 num_fields = k->java_fields_count();
1686
1687 if (k() == SystemDictionary::Throwable_klass()) {
1688 num_fields--;
1689 skip_backtrace = true;
1690 }
1691 }
1692
1693 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1694 objArrayHandle result (THREAD, r);
1695
1696 int out_idx = 0;
1697 fieldDescriptor fd;
1698 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1699 if (skip_backtrace) {
1700 // 4496456 skip java.lang.Throwable.backtrace
1701 int offset = fs.offset();
1702 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1703 }
1704
1705 if (!publicOnly || fs.access_flags().is_public()) {
1706 fd.initialize(k(), fs.index());
1707 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1708 result->obj_at_put(out_idx, field);
1709 ++out_idx;
1710 }
1711 }
1712 assert(out_idx == num_fields, "just checking");
1713 return (jobjectArray) JNIHandles::make_local(env, result());
1714 }
1715 JVM_END
1716
1717 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1718 {
1719 JVMWrapper("JVM_GetClassDeclaredMethods");
1720 JvmtiVMObjectAllocEventCollector oam;
1721
1722 // Exclude primitive types and array types
1723 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1724 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1725 // Return empty array
1726 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1727 return (jobjectArray) JNIHandles::make_local(env, res);
1728 }
1729
1730 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1731
1732 // Ensure class is linked
1733 k->link_class(CHECK_NULL);
1734
1735 objArrayHandle methods (THREAD, k->methods());
1736 int methods_length = methods->length();
1737 int num_methods = 0;
1738
1739 int i;
1740 for (i = 0; i < methods_length; i++) {
1741 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1742 if (!method->is_initializer()) {
1743 if (!publicOnly || method->is_public()) {
1744 ++num_methods;
1745 }
1746 }
1747 }
1748
1749 // Allocate result
1750 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1751 objArrayHandle result (THREAD, r);
1752
1753 int out_idx = 0;
1754 for (i = 0; i < methods_length; i++) {
1755 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1756 if (!method->is_initializer()) {
1757 if (!publicOnly || method->is_public()) {
1758 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1759 result->obj_at_put(out_idx, m);
1760 ++out_idx;
1761 }
1762 }
1763 }
1764 assert(out_idx == num_methods, "just checking");
1765 return (jobjectArray) JNIHandles::make_local(env, result());
1766 }
1767 JVM_END
1768
1769 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1770 {
1771 JVMWrapper("JVM_GetClassDeclaredConstructors");
1772 JvmtiVMObjectAllocEventCollector oam;
1773
1774 // Exclude primitive types and array types
1775 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1776 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1777 // Return empty array
1778 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1779 return (jobjectArray) JNIHandles::make_local(env, res);
1780 }
1781
1782 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1783
1784 // Ensure class is linked
1785 k->link_class(CHECK_NULL);
1786
1787 objArrayHandle methods (THREAD, k->methods());
1788 int methods_length = methods->length();
1789 int num_constructors = 0;
1790
1791 int i;
1792 for (i = 0; i < methods_length; i++) {
1793 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1794 if (method->is_initializer() && !method->is_static()) {
1795 if (!publicOnly || method->is_public()) {
1796 ++num_constructors;
1797 }
1798 }
1799 }
1800
1801 // Allocate result
1802 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1803 objArrayHandle result(THREAD, r);
1804
1805 int out_idx = 0;
1806 for (i = 0; i < methods_length; i++) {
1807 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1808 if (method->is_initializer() && !method->is_static()) {
1809 if (!publicOnly || method->is_public()) {
1810 oop m = Reflection::new_constructor(method, CHECK_NULL);
1811 result->obj_at_put(out_idx, m);
1812 ++out_idx;
1813 }
1814 }
1815 }
1816 assert(out_idx == num_constructors, "just checking");
1817 return (jobjectArray) JNIHandles::make_local(env, result());
1818 }
1819 JVM_END
1820
1821 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1822 {
1823 JVMWrapper("JVM_GetClassAccessFlags");
1824 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1825 // Primitive type
1826 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1827 }
1828
1829 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1830 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1831 }
1832 JVM_END
1833
1834
1835 // Constant pool access //////////////////////////////////////////////////////////
1836
1837 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1838 {
1839 JVMWrapper("JVM_GetClassConstantPool");
1840 JvmtiVMObjectAllocEventCollector oam;
1841
1842 // Return null for primitives and arrays
1843 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1844 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1845 if (Klass::cast(k)->oop_is_instance()) {
1846 instanceKlassHandle k_h(THREAD, k);
1847 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1848 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1849 return JNIHandles::make_local(jcp());
1850 }
1851 }
1852 return NULL;
1853 }
1854 JVM_END
1855
1856
1857 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1858 {
1859 JVMWrapper("JVM_ConstantPoolGetSize");
1860 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1861 return cp->length();
1862 }
1863 JVM_END
1864
1865
1866 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1867 if (!cp->is_within_bounds(index)) {
1868 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1869 }
1870 }
1871
1872
1873 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1874 {
1875 JVMWrapper("JVM_ConstantPoolGetClassAt");
1876 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1877 bounds_check(cp, index, CHECK_NULL);
1878 constantTag tag = cp->tag_at(index);
1879 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1880 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1881 }
1882 klassOop k = cp->klass_at(index, CHECK_NULL);
1883 return (jclass) JNIHandles::make_local(k->java_mirror());
1884 }
1885 JVM_END
1886
1887
1888 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1889 {
1890 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1891 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1892 bounds_check(cp, index, CHECK_NULL);
1893 constantTag tag = cp->tag_at(index);
1894 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1895 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1896 }
1897 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1898 if (k == NULL) return NULL;
1899 return (jclass) JNIHandles::make_local(k->java_mirror());
1900 }
1901 JVM_END
1902
1903 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1904 constantTag tag = cp->tag_at(index);
1905 if (!tag.is_method() && !tag.is_interface_method()) {
1906 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1907 }
1908 int klass_ref = cp->uncached_klass_ref_index_at(index);
1909 klassOop k_o;
1910 if (force_resolution) {
1911 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1912 } else {
1913 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1914 if (k_o == NULL) return NULL;
1915 }
1916 instanceKlassHandle k(THREAD, k_o);
1917 Symbol* name = cp->uncached_name_ref_at(index);
1918 Symbol* sig = cp->uncached_signature_ref_at(index);
1919 methodHandle m (THREAD, k->find_method(name, sig));
1920 if (m.is_null()) {
1921 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1922 }
1923 oop method;
1924 if (!m->is_initializer() || m->is_static()) {
1925 method = Reflection::new_method(m, true, true, CHECK_NULL);
1926 } else {
1927 method = Reflection::new_constructor(m, CHECK_NULL);
1928 }
1929 return JNIHandles::make_local(method);
1930 }
1931
1932 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1933 {
1934 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1935 JvmtiVMObjectAllocEventCollector oam;
1936 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1937 bounds_check(cp, index, CHECK_NULL);
1938 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1939 return res;
1940 }
1941 JVM_END
1942
1943 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1944 {
1945 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1946 JvmtiVMObjectAllocEventCollector oam;
1947 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1948 bounds_check(cp, index, CHECK_NULL);
1949 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1950 return res;
1951 }
1952 JVM_END
1953
1954 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1955 constantTag tag = cp->tag_at(index);
1956 if (!tag.is_field()) {
1957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1958 }
1959 int klass_ref = cp->uncached_klass_ref_index_at(index);
1960 klassOop k_o;
1961 if (force_resolution) {
1962 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1963 } else {
1964 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1965 if (k_o == NULL) return NULL;
1966 }
1967 instanceKlassHandle k(THREAD, k_o);
1968 Symbol* name = cp->uncached_name_ref_at(index);
1969 Symbol* sig = cp->uncached_signature_ref_at(index);
1970 fieldDescriptor fd;
1971 klassOop target_klass = k->find_field(name, sig, &fd);
1972 if (target_klass == NULL) {
1973 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1974 }
1975 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1976 return JNIHandles::make_local(field);
1977 }
1978
1979 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1980 {
1981 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1982 JvmtiVMObjectAllocEventCollector oam;
1983 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1984 bounds_check(cp, index, CHECK_NULL);
1985 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1986 return res;
1987 }
1988 JVM_END
1989
1990 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1991 {
1992 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1993 JvmtiVMObjectAllocEventCollector oam;
1994 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1995 bounds_check(cp, index, CHECK_NULL);
1996 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1997 return res;
1998 }
1999 JVM_END
2000
2001 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2002 {
2003 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2004 JvmtiVMObjectAllocEventCollector oam;
2005 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2006 bounds_check(cp, index, CHECK_NULL);
2007 constantTag tag = cp->tag_at(index);
2008 if (!tag.is_field_or_method()) {
2009 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2010 }
2011 int klass_ref = cp->uncached_klass_ref_index_at(index);
2012 Symbol* klass_name = cp->klass_name_at(klass_ref);
2013 Symbol* member_name = cp->uncached_name_ref_at(index);
2014 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2015 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2016 objArrayHandle dest(THREAD, dest_o);
2017 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2018 dest->obj_at_put(0, str());
2019 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2020 dest->obj_at_put(1, str());
2021 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2022 dest->obj_at_put(2, str());
2023 return (jobjectArray) JNIHandles::make_local(dest());
2024 }
2025 JVM_END
2026
2027 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2028 {
2029 JVMWrapper("JVM_ConstantPoolGetIntAt");
2030 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2031 bounds_check(cp, index, CHECK_0);
2032 constantTag tag = cp->tag_at(index);
2033 if (!tag.is_int()) {
2034 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2035 }
2036 return cp->int_at(index);
2037 }
2038 JVM_END
2039
2040 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2041 {
2042 JVMWrapper("JVM_ConstantPoolGetLongAt");
2043 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2044 bounds_check(cp, index, CHECK_(0L));
2045 constantTag tag = cp->tag_at(index);
2046 if (!tag.is_long()) {
2047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2048 }
2049 return cp->long_at(index);
2050 }
2051 JVM_END
2052
2053 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2054 {
2055 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2056 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2057 bounds_check(cp, index, CHECK_(0.0f));
2058 constantTag tag = cp->tag_at(index);
2059 if (!tag.is_float()) {
2060 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2061 }
2062 return cp->float_at(index);
2063 }
2064 JVM_END
2065
2066 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2067 {
2068 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2069 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2070 bounds_check(cp, index, CHECK_(0.0));
2071 constantTag tag = cp->tag_at(index);
2072 if (!tag.is_double()) {
2073 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2074 }
2075 return cp->double_at(index);
2076 }
2077 JVM_END
2078
2079 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2080 {
2081 JVMWrapper("JVM_ConstantPoolGetStringAt");
2082 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2083 bounds_check(cp, index, CHECK_NULL);
2084 constantTag tag = cp->tag_at(index);
2085 if (!tag.is_string() && !tag.is_unresolved_string()) {
2086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2087 }
2088 oop str = cp->string_at(index, CHECK_NULL);
2089 return (jstring) JNIHandles::make_local(str);
2090 }
2091 JVM_END
2092
2093 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2094 {
2095 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2096 JvmtiVMObjectAllocEventCollector oam;
2097 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2098 bounds_check(cp, index, CHECK_NULL);
2099 constantTag tag = cp->tag_at(index);
2100 if (!tag.is_symbol()) {
2101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2102 }
2103 Symbol* sym = cp->symbol_at(index);
2104 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2105 return (jstring) JNIHandles::make_local(str());
2106 }
2107 JVM_END
2108
2109
2110 // Assertion support. //////////////////////////////////////////////////////////
2111
2112 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2113 JVMWrapper("JVM_DesiredAssertionStatus");
2114 assert(cls != NULL, "bad class");
2115
2116 oop r = JNIHandles::resolve(cls);
2117 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2118 if (java_lang_Class::is_primitive(r)) return false;
2119
2120 klassOop k = java_lang_Class::as_klassOop(r);
2121 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2122 if (! Klass::cast(k)->oop_is_instance()) return false;
2123
2124 ResourceMark rm(THREAD);
2125 const char* name = Klass::cast(k)->name()->as_C_string();
2126 bool system_class = Klass::cast(k)->class_loader() == NULL;
2127 return JavaAssertions::enabled(name, system_class);
2128
2129 JVM_END
2130
2131
2132 // Return a new AssertionStatusDirectives object with the fields filled in with
2133 // command-line assertion arguments (i.e., -ea, -da).
2134 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2135 JVMWrapper("JVM_AssertionStatusDirectives");
2136 JvmtiVMObjectAllocEventCollector oam;
2137 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2138 return JNIHandles::make_local(env, asd);
2139 JVM_END
2140
2141 // Verification ////////////////////////////////////////////////////////////////////////////////
2142
2143 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2144
2145 // RedefineClasses support: bug 6214132 caused verification to fail.
2146 // All functions from this section should call the jvmtiThreadSate function:
2147 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2148 // The function returns a klassOop of the _scratch_class if the verifier
2149 // was invoked in the middle of the class redefinition.
2150 // Otherwise it returns its argument value which is the _the_class klassOop.
2151 // Please, refer to the description in the jvmtiThreadSate.hpp.
2152
2153 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2154 JVMWrapper("JVM_GetClassNameUTF");
2155 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2156 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2157 return Klass::cast(k)->name()->as_utf8();
2158 JVM_END
2159
2160
2161 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2162 JVMWrapper("JVM_GetClassCPTypes");
2163 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2165 // types will have length zero if this is not an instanceKlass
2166 // (length is determined by call to JVM_GetClassCPEntriesCount)
2167 if (Klass::cast(k)->oop_is_instance()) {
2168 constantPoolOop cp = instanceKlass::cast(k)->constants();
2169 for (int index = cp->length() - 1; index >= 0; index--) {
2170 constantTag tag = cp->tag_at(index);
2171 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2172 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2173 }
2174 }
2175 JVM_END
2176
2177
2178 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2179 JVMWrapper("JVM_GetClassCPEntriesCount");
2180 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2181 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2182 if (!Klass::cast(k)->oop_is_instance())
2183 return 0;
2184 return instanceKlass::cast(k)->constants()->length();
2185 JVM_END
2186
2187
2188 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2189 JVMWrapper("JVM_GetClassFieldsCount");
2190 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2191 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2192 if (!Klass::cast(k)->oop_is_instance())
2193 return 0;
2194 return instanceKlass::cast(k)->java_fields_count();
2195 JVM_END
2196
2197
2198 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2199 JVMWrapper("JVM_GetClassMethodsCount");
2200 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2201 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2202 if (!Klass::cast(k)->oop_is_instance())
2203 return 0;
2204 return instanceKlass::cast(k)->methods()->length();
2205 JVM_END
2206
2207
2208 // The following methods, used for the verifier, are never called with
2209 // array klasses, so a direct cast to instanceKlass is safe.
2210 // Typically, these methods are called in a loop with bounds determined
2211 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2212 // zero for arrays.
2213 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2214 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2215 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2216 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2217 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2218 int length = methodOop(method)->checked_exceptions_length();
2219 if (length > 0) {
2220 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2221 for (int i = 0; i < length; i++) {
2222 exceptions[i] = table[i].class_cp_index;
2223 }
2224 }
2225 JVM_END
2226
2227
2228 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2229 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2230 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2233 return methodOop(method)->checked_exceptions_length();
2234 JVM_END
2235
2236
2237 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2238 JVMWrapper("JVM_GetMethodIxByteCode");
2239 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2240 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2241 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2242 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2243 JVM_END
2244
2245
2246 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2247 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2248 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2249 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2250 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2251 return methodOop(method)->code_size();
2252 JVM_END
2253
2254
2255 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2256 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2257 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2258 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2259 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2260 ExceptionTable extable((methodOop(method)));
2261 entry->start_pc = extable.start_pc(entry_index);
2262 entry->end_pc = extable.end_pc(entry_index);
2263 entry->handler_pc = extable.handler_pc(entry_index);
2264 entry->catchType = extable.catch_type_index(entry_index);
2265 JVM_END
2266
2267
2268 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2269 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2270 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2273 return methodOop(method)->exception_table_length();
2274 JVM_END
2275
2276
2277 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2278 JVMWrapper("JVM_GetMethodIxModifiers");
2279 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2280 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2281 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2282 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2283 JVM_END
2284
2285
2286 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2287 JVMWrapper("JVM_GetFieldIxModifiers");
2288 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2290 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2291 JVM_END
2292
2293
2294 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2295 JVMWrapper("JVM_GetMethodIxLocalsCount");
2296 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2298 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2299 return methodOop(method)->max_locals();
2300 JVM_END
2301
2302
2303 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2304 JVMWrapper("JVM_GetMethodIxArgsSize");
2305 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2308 return methodOop(method)->size_of_parameters();
2309 JVM_END
2310
2311
2312 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2313 JVMWrapper("JVM_GetMethodIxMaxStack");
2314 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2317 return methodOop(method)->verifier_max_stack();
2318 JVM_END
2319
2320
2321 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2322 JVMWrapper("JVM_IsConstructorIx");
2323 ResourceMark rm(THREAD);
2324 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2325 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2326 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2327 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2328 JVM_END
2329
2330
2331 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2332 JVMWrapper("JVM_GetMethodIxIxUTF");
2333 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2335 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2336 return methodOop(method)->name()->as_utf8();
2337 JVM_END
2338
2339
2340 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2341 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2342 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2345 return methodOop(method)->signature()->as_utf8();
2346 JVM_END
2347
2348 /**
2349 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2350 * read entries in the constant pool. Since the old verifier always
2351 * works on a copy of the code, it will not see any rewriting that
2352 * may possibly occur in the middle of verification. So it is important
2353 * that nothing it calls tries to use the cpCache instead of the raw
2354 * constant pool, so we must use cp->uncached_x methods when appropriate.
2355 */
2356 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2357 JVMWrapper("JVM_GetCPFieldNameUTF");
2358 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2359 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360 constantPoolOop cp = instanceKlass::cast(k)->constants();
2361 switch (cp->tag_at(cp_index).value()) {
2362 case JVM_CONSTANT_Fieldref:
2363 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2364 default:
2365 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2366 }
2367 ShouldNotReachHere();
2368 return NULL;
2369 JVM_END
2370
2371
2372 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2373 JVMWrapper("JVM_GetCPMethodNameUTF");
2374 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 constantPoolOop cp = instanceKlass::cast(k)->constants();
2377 switch (cp->tag_at(cp_index).value()) {
2378 case JVM_CONSTANT_InterfaceMethodref:
2379 case JVM_CONSTANT_Methodref:
2380 case JVM_CONSTANT_NameAndType: // for invokedynamic
2381 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2382 default:
2383 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2384 }
2385 ShouldNotReachHere();
2386 return NULL;
2387 JVM_END
2388
2389
2390 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2391 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2392 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394 constantPoolOop cp = instanceKlass::cast(k)->constants();
2395 switch (cp->tag_at(cp_index).value()) {
2396 case JVM_CONSTANT_InterfaceMethodref:
2397 case JVM_CONSTANT_Methodref:
2398 case JVM_CONSTANT_NameAndType: // for invokedynamic
2399 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2400 default:
2401 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2402 }
2403 ShouldNotReachHere();
2404 return NULL;
2405 JVM_END
2406
2407
2408 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2409 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2410 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2412 constantPoolOop cp = instanceKlass::cast(k)->constants();
2413 switch (cp->tag_at(cp_index).value()) {
2414 case JVM_CONSTANT_Fieldref:
2415 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2416 default:
2417 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2418 }
2419 ShouldNotReachHere();
2420 return NULL;
2421 JVM_END
2422
2423
2424 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2425 JVMWrapper("JVM_GetCPClassNameUTF");
2426 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 constantPoolOop cp = instanceKlass::cast(k)->constants();
2429 Symbol* classname = cp->klass_name_at(cp_index);
2430 return classname->as_utf8();
2431 JVM_END
2432
2433
2434 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2435 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2436 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438 constantPoolOop cp = instanceKlass::cast(k)->constants();
2439 switch (cp->tag_at(cp_index).value()) {
2440 case JVM_CONSTANT_Fieldref: {
2441 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2442 Symbol* classname = cp->klass_name_at(class_index);
2443 return classname->as_utf8();
2444 }
2445 default:
2446 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2447 }
2448 ShouldNotReachHere();
2449 return NULL;
2450 JVM_END
2451
2452
2453 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2454 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2455 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 constantPoolOop cp = instanceKlass::cast(k)->constants();
2458 switch (cp->tag_at(cp_index).value()) {
2459 case JVM_CONSTANT_Methodref:
2460 case JVM_CONSTANT_InterfaceMethodref: {
2461 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2462 Symbol* classname = cp->klass_name_at(class_index);
2463 return classname->as_utf8();
2464 }
2465 default:
2466 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2467 }
2468 ShouldNotReachHere();
2469 return NULL;
2470 JVM_END
2471
2472
2473 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2474 JVMWrapper("JVM_GetCPFieldModifiers");
2475 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2476 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2477 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2478 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2479 constantPoolOop cp = instanceKlass::cast(k)->constants();
2480 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2481 switch (cp->tag_at(cp_index).value()) {
2482 case JVM_CONSTANT_Fieldref: {
2483 Symbol* name = cp->uncached_name_ref_at(cp_index);
2484 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2485 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2486 if (fs.name() == name && fs.signature() == signature) {
2487 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2488 }
2489 }
2490 return -1;
2491 }
2492 default:
2493 fatal("JVM_GetCPFieldModifiers: illegal constant");
2494 }
2495 ShouldNotReachHere();
2496 return 0;
2497 JVM_END
2498
2499
2500 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2501 JVMWrapper("JVM_GetCPMethodModifiers");
2502 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2503 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2506 constantPoolOop cp = instanceKlass::cast(k)->constants();
2507 switch (cp->tag_at(cp_index).value()) {
2508 case JVM_CONSTANT_Methodref:
2509 case JVM_CONSTANT_InterfaceMethodref: {
2510 Symbol* name = cp->uncached_name_ref_at(cp_index);
2511 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2512 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2513 int methods_count = methods->length();
2514 for (int i = 0; i < methods_count; i++) {
2515 methodOop method = methodOop(methods->obj_at(i));
2516 if (method->name() == name && method->signature() == signature) {
2517 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2518 }
2519 }
2520 return -1;
2521 }
2522 default:
2523 fatal("JVM_GetCPMethodModifiers: illegal constant");
2524 }
2525 ShouldNotReachHere();
2526 return 0;
2527 JVM_END
2528
2529
2530 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2531
2532 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2533 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2534 JVM_END
2535
2536
2537 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2538 JVMWrapper("JVM_IsSameClassPackage");
2539 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2540 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2541 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2542 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2543 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2544 JVM_END
2545
2546
2547 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2548
2549 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2550 JVMWrapper2("JVM_Open (%s)", fname);
2551
2552 //%note jvm_r6
2553 int result = os::open(fname, flags, mode);
2554 if (result >= 0) {
2555 return result;
2556 } else {
2557 switch(errno) {
2558 case EEXIST:
2559 return JVM_EEXIST;
2560 default:
2561 return -1;
2562 }
2563 }
2564 JVM_END
2565
2566
2567 JVM_LEAF(jint, JVM_Close(jint fd))
2568 JVMWrapper2("JVM_Close (0x%x)", fd);
2569 //%note jvm_r6
2570 return os::close(fd);
2571 JVM_END
2572
2573
2574 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2575 JVMWrapper2("JVM_Read (0x%x)", fd);
2576
2577 //%note jvm_r6
2578 return (jint)os::restartable_read(fd, buf, nbytes);
2579 JVM_END
2580
2581
2582 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2583 JVMWrapper2("JVM_Write (0x%x)", fd);
2584
2585 //%note jvm_r6
2586 return (jint)os::write(fd, buf, nbytes);
2587 JVM_END
2588
2589
2590 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2591 JVMWrapper2("JVM_Available (0x%x)", fd);
2592 //%note jvm_r6
2593 return os::available(fd, pbytes);
2594 JVM_END
2595
2596
2597 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2598 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2599 //%note jvm_r6
2600 return os::lseek(fd, offset, whence);
2601 JVM_END
2602
2603
2604 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2605 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2606 return os::ftruncate(fd, length);
2607 JVM_END
2608
2609
2610 JVM_LEAF(jint, JVM_Sync(jint fd))
2611 JVMWrapper2("JVM_Sync (0x%x)", fd);
2612 //%note jvm_r6
2613 return os::fsync(fd);
2614 JVM_END
2615
2616
2617 // Printing support //////////////////////////////////////////////////
2618 extern "C" {
2619
2620 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2621 // see bug 4399518, 4417214
2622 if ((intptr_t)count <= 0) return -1;
2623 return vsnprintf(str, count, fmt, args);
2624 }
2625
2626
2627 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2628 va_list args;
2629 int len;
2630 va_start(args, fmt);
2631 len = jio_vsnprintf(str, count, fmt, args);
2632 va_end(args);
2633 return len;
2634 }
2635
2636
2637 int jio_fprintf(FILE* f, const char *fmt, ...) {
2638 int len;
2639 va_list args;
2640 va_start(args, fmt);
2641 len = jio_vfprintf(f, fmt, args);
2642 va_end(args);
2643 return len;
2644 }
2645
2646
2647 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2648 if (Arguments::vfprintf_hook() != NULL) {
2649 return Arguments::vfprintf_hook()(f, fmt, args);
2650 } else {
2651 return vfprintf(f, fmt, args);
2652 }
2653 }
2654
2655
2656 JNIEXPORT int jio_printf(const char *fmt, ...) {
2657 int len;
2658 va_list args;
2659 va_start(args, fmt);
2660 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2661 va_end(args);
2662 return len;
2663 }
2664
2665
2666 // HotSpot specific jio method
2667 void jio_print(const char* s) {
2668 // Try to make this function as atomic as possible.
2669 if (Arguments::vfprintf_hook() != NULL) {
2670 jio_fprintf(defaultStream::output_stream(), "%s", s);
2671 } else {
2672 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2673 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2674 }
2675 }
2676
2677 } // Extern C
2678
2679 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2680
2681 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2682 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2683 // OSThread objects. The exception to this rule is when the target object is the thread
2684 // doing the operation, in which case we know that the thread won't exit until the
2685 // operation is done (all exits being voluntary). There are a few cases where it is
2686 // rather silly to do operations on yourself, like resuming yourself or asking whether
2687 // you are alive. While these can still happen, they are not subject to deadlocks if
2688 // the lock is held while the operation occurs (this is not the case for suspend, for
2689 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2690 // implementation is local to this file, we always lock Threads_lock for that one.
2691
2692 static void thread_entry(JavaThread* thread, TRAPS) {
2693 HandleMark hm(THREAD);
2694 Handle obj(THREAD, thread->threadObj());
2695 JavaValue result(T_VOID);
2696 JavaCalls::call_virtual(&result,
2697 obj,
2698 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2699 vmSymbols::run_method_name(),
2700 vmSymbols::void_method_signature(),
2701 THREAD);
2702 }
2703
2704
2705 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2706 JVMWrapper("JVM_StartThread");
2707 JavaThread *native_thread = NULL;
2708
2709 // We cannot hold the Threads_lock when we throw an exception,
2710 // due to rank ordering issues. Example: we might need to grab the
2711 // Heap_lock while we construct the exception.
2712 bool throw_illegal_thread_state = false;
2713
2714 // We must release the Threads_lock before we can post a jvmti event
2715 // in Thread::start.
2716 {
2717 // Ensure that the C++ Thread and OSThread structures aren't freed before
2718 // we operate.
2719 MutexLocker mu(Threads_lock);
2720
2721 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2722 // re-starting an already started thread, so we should usually find
2723 // that the JavaThread is null. However for a JNI attached thread
2724 // there is a small window between the Thread object being created
2725 // (with its JavaThread set) and the update to its threadStatus, so we
2726 // have to check for this
2727 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2728 throw_illegal_thread_state = true;
2729 } else {
2730 // We could also check the stillborn flag to see if this thread was already stopped, but
2731 // for historical reasons we let the thread detect that itself when it starts running
2732
2733 jlong size =
2734 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2735 // Allocate the C++ Thread structure and create the native thread. The
2736 // stack size retrieved from java is signed, but the constructor takes
2737 // size_t (an unsigned type), so avoid passing negative values which would
2738 // result in really large stacks.
2739 size_t sz = size > 0 ? (size_t) size : 0;
2740 native_thread = new JavaThread(&thread_entry, sz);
2741
2742 // At this point it may be possible that no osthread was created for the
2743 // JavaThread due to lack of memory. Check for this situation and throw
2744 // an exception if necessary. Eventually we may want to change this so
2745 // that we only grab the lock if the thread was created successfully -
2746 // then we can also do this check and throw the exception in the
2747 // JavaThread constructor.
2748 if (native_thread->osthread() != NULL) {
2749 // Note: the current thread is not being used within "prepare".
2750 native_thread->prepare(jthread);
2751 }
2752 }
2753 }
2754
2755 if (throw_illegal_thread_state) {
2756 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2757 }
2758
2759 assert(native_thread != NULL, "Starting null thread?");
2760
2761 if (native_thread->osthread() == NULL) {
2762 // No one should hold a reference to the 'native_thread'.
2763 delete native_thread;
2764 if (JvmtiExport::should_post_resource_exhausted()) {
2765 JvmtiExport::post_resource_exhausted(
2766 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2767 "unable to create new native thread");
2768 }
2769 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2770 "unable to create new native thread");
2771 }
2772
2773 Thread::start(native_thread);
2774
2775 JVM_END
2776
2777 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2778 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2779 // but is thought to be reliable and simple. In the case, where the receiver is the
2780 // same thread as the sender, no safepoint is needed.
2781 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2782 JVMWrapper("JVM_StopThread");
2783
2784 oop java_throwable = JNIHandles::resolve(throwable);
2785 if (java_throwable == NULL) {
2786 THROW(vmSymbols::java_lang_NullPointerException());
2787 }
2788 oop java_thread = JNIHandles::resolve_non_null(jthread);
2789 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2790 Events::log_exception(JavaThread::current(),
2791 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2792 receiver, (address)java_thread, throwable);
2793 // First check if thread is alive
2794 if (receiver != NULL) {
2795 // Check if exception is getting thrown at self (use oop equality, since the
2796 // target object might exit)
2797 if (java_thread == thread->threadObj()) {
2798 THROW_OOP(java_throwable);
2799 } else {
2800 // Enques a VM_Operation to stop all threads and then deliver the exception...
2801 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2802 }
2803 }
2804 else {
2805 // Either:
2806 // - target thread has not been started before being stopped, or
2807 // - target thread already terminated
2808 // We could read the threadStatus to determine which case it is
2809 // but that is overkill as it doesn't matter. We must set the
2810 // stillborn flag for the first case, and if the thread has already
2811 // exited setting this flag has no affect
2812 java_lang_Thread::set_stillborn(java_thread);
2813 }
2814 JVM_END
2815
2816
2817 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2818 JVMWrapper("JVM_IsThreadAlive");
2819
2820 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2821 return java_lang_Thread::is_alive(thread_oop);
2822 JVM_END
2823
2824
2825 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2826 JVMWrapper("JVM_SuspendThread");
2827 oop java_thread = JNIHandles::resolve_non_null(jthread);
2828 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2829
2830 if (receiver != NULL) {
2831 // thread has run and has not exited (still on threads list)
2832
2833 {
2834 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2835 if (receiver->is_external_suspend()) {
2836 // Don't allow nested external suspend requests. We can't return
2837 // an error from this interface so just ignore the problem.
2838 return;
2839 }
2840 if (receiver->is_exiting()) { // thread is in the process of exiting
2841 return;
2842 }
2843 receiver->set_external_suspend();
2844 }
2845
2846 // java_suspend() will catch threads in the process of exiting
2847 // and will ignore them.
2848 receiver->java_suspend();
2849
2850 // It would be nice to have the following assertion in all the
2851 // time, but it is possible for a racing resume request to have
2852 // resumed this thread right after we suspended it. Temporarily
2853 // enable this assertion if you are chasing a different kind of
2854 // bug.
2855 //
2856 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2857 // receiver->is_being_ext_suspended(), "thread is not suspended");
2858 }
2859 JVM_END
2860
2861
2862 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2863 JVMWrapper("JVM_ResumeThread");
2864 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2865 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2866 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2867 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2868 // looks at it.
2869 MutexLocker ml(Threads_lock);
2870 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2871 if (thr != NULL) {
2872 // the thread has run and is not in the process of exiting
2873 thr->java_resume();
2874 }
2875 JVM_END
2876
2877
2878 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2879 JVMWrapper("JVM_SetThreadPriority");
2880 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2881 MutexLocker ml(Threads_lock);
2882 oop java_thread = JNIHandles::resolve_non_null(jthread);
2883 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2884 JavaThread* thr = java_lang_Thread::thread(java_thread);
2885 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2886 Thread::set_priority(thr, (ThreadPriority)prio);
2887 }
2888 JVM_END
2889
2890
2891 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2892 JVMWrapper("JVM_Yield");
2893 if (os::dont_yield()) return;
2894 #ifndef USDT2
2895 HS_DTRACE_PROBE0(hotspot, thread__yield);
2896 #else /* USDT2 */
2897 HOTSPOT_THREAD_YIELD();
2898 #endif /* USDT2 */
2899 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2900 // Critical for similar threading behaviour
2901 if (ConvertYieldToSleep) {
2902 os::sleep(thread, MinSleepInterval, false);
2903 } else {
2904 os::yield();
2905 }
2906 JVM_END
2907
2908
2909 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2910 JVMWrapper("JVM_Sleep");
2911
2912 if (millis < 0) {
2913 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2914 }
2915
2916 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2917 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2918 }
2919
2920 // Save current thread state and restore it at the end of this block.
2921 // And set new thread state to SLEEPING.
2922 JavaThreadSleepState jtss(thread);
2923
2924 #ifndef USDT2
2925 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2926 #else /* USDT2 */
2927 HOTSPOT_THREAD_SLEEP_BEGIN(
2928 millis);
2929 #endif /* USDT2 */
2930
2931 EventThreadSleep event;
2932
2933 if (millis == 0) {
2934 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2935 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2936 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2937 // for SOLARIS
2938 if (ConvertSleepToYield) {
2939 os::yield();
2940 } else {
2941 ThreadState old_state = thread->osthread()->get_state();
2942 thread->osthread()->set_state(SLEEPING);
2943 os::sleep(thread, MinSleepInterval, false);
2944 thread->osthread()->set_state(old_state);
2945 }
2946 } else {
2947 ThreadState old_state = thread->osthread()->get_state();
2948 thread->osthread()->set_state(SLEEPING);
2949 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2950 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2951 // us while we were sleeping. We do not overwrite those.
2952 if (!HAS_PENDING_EXCEPTION) {
2953 if (event.should_commit()) {
2954 event.set_time(millis);
2955 event.commit();
2956 }
2957 #ifndef USDT2
2958 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2959 #else /* USDT2 */
2960 HOTSPOT_THREAD_SLEEP_END(
2961 1);
2962 #endif /* USDT2 */
2963 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2964 // to properly restore the thread state. That's likely wrong.
2965 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2966 }
2967 }
2968 thread->osthread()->set_state(old_state);
2969 }
2970 if (event.should_commit()) {
2971 event.set_time(millis);
2972 event.commit();
2973 }
2974 #ifndef USDT2
2975 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2976 #else /* USDT2 */
2977 HOTSPOT_THREAD_SLEEP_END(
2978 0);
2979 #endif /* USDT2 */
2980 JVM_END
2981
2982 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2983 JVMWrapper("JVM_CurrentThread");
2984 oop jthread = thread->threadObj();
2985 assert (thread != NULL, "no current thread!");
2986 return JNIHandles::make_local(env, jthread);
2987 JVM_END
2988
2989
2990 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2991 JVMWrapper("JVM_CountStackFrames");
2992
2993 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2994 oop java_thread = JNIHandles::resolve_non_null(jthread);
2995 bool throw_illegal_thread_state = false;
2996 int count = 0;
2997
2998 {
2999 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3000 // We need to re-resolve the java_thread, since a GC might have happened during the
3001 // acquire of the lock
3002 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3003
3004 if (thr == NULL) {
3005 // do nothing
3006 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3007 // Check whether this java thread has been suspended already. If not, throws
3008 // IllegalThreadStateException. We defer to throw that exception until
3009 // Threads_lock is released since loading exception class has to leave VM.
3010 // The correct way to test a thread is actually suspended is
3011 // wait_for_ext_suspend_completion(), but we can't call that while holding
3012 // the Threads_lock. The above tests are sufficient for our purposes
3013 // provided the walkability of the stack is stable - which it isn't
3014 // 100% but close enough for most practical purposes.
3015 throw_illegal_thread_state = true;
3016 } else {
3017 // Count all java activation, i.e., number of vframes
3018 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3019 // Native frames are not counted
3020 if (!vfst.method()->is_native()) count++;
3021 }
3022 }
3023 }
3024
3025 if (throw_illegal_thread_state) {
3026 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3027 "this thread is not suspended");
3028 }
3029 return count;
3030 JVM_END
3031
3032 // Consider: A better way to implement JVM_Interrupt() is to acquire
3033 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3034 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3035 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3036 // outside the critical section. Threads_lock is hot so we want to minimize
3037 // the hold-time. A cleaner interface would be to decompose interrupt into
3038 // two steps. The 1st phase, performed under Threads_lock, would return
3039 // a closure that'd be invoked after Threads_lock was dropped.
3040 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3041 // admit spurious wakeups.
3042
3043 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3044 JVMWrapper("JVM_Interrupt");
3045
3046 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3047 oop java_thread = JNIHandles::resolve_non_null(jthread);
3048 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3049 // We need to re-resolve the java_thread, since a GC might have happened during the
3050 // acquire of the lock
3051 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3052 if (thr != NULL) {
3053 Thread::interrupt(thr);
3054 }
3055 JVM_END
3056
3057
3058 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3059 JVMWrapper("JVM_IsInterrupted");
3060
3061 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3062 oop java_thread = JNIHandles::resolve_non_null(jthread);
3063 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3064 // We need to re-resolve the java_thread, since a GC might have happened during the
3065 // acquire of the lock
3066 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3067 if (thr == NULL) {
3068 return JNI_FALSE;
3069 } else {
3070 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3071 }
3072 JVM_END
3073
3074
3075 // Return true iff the current thread has locked the object passed in
3076
3077 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3078 JVMWrapper("JVM_HoldsLock");
3079 assert(THREAD->is_Java_thread(), "sanity check");
3080 if (obj == NULL) {
3081 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3082 }
3083 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3084 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3085 JVM_END
3086
3087
3088 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3089 JVMWrapper("JVM_DumpAllStacks");
3090 VM_PrintThreads op;
3091 VMThread::execute(&op);
3092 if (JvmtiExport::should_post_data_dump()) {
3093 JvmtiExport::post_data_dump();
3094 }
3095 JVM_END
3096
3097 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3098 JVMWrapper("JVM_SetNativeThreadName");
3099 ResourceMark rm(THREAD);
3100 oop java_thread = JNIHandles::resolve_non_null(jthread);
3101 JavaThread* thr = java_lang_Thread::thread(java_thread);
3102 // Thread naming only supported for the current thread, doesn't work for
3103 // target threads.
3104 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3105 // we don't set the name of an attached thread to avoid stepping
3106 // on other programs
3107 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3108 os::set_native_thread_name(thread_name);
3109 }
3110 JVM_END
3111
3112 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3113
3114 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3115 assert(jthread->is_Java_thread(), "must be a Java thread");
3116 if (jthread->privileged_stack_top() == NULL) return false;
3117 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3118 oop loader = jthread->privileged_stack_top()->class_loader();
3119 if (loader == NULL) return true;
3120 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3121 if (trusted) return true;
3122 }
3123 return false;
3124 }
3125
3126 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3127 JVMWrapper("JVM_CurrentLoadedClass");
3128 ResourceMark rm(THREAD);
3129
3130 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3131 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3132 bool trusted = is_trusted_frame(thread, &vfst);
3133 if (trusted) return NULL;
3134
3135 methodOop m = vfst.method();
3136 if (!m->is_native()) {
3137 klassOop holder = m->method_holder();
3138 oop loader = instanceKlass::cast(holder)->class_loader();
3139 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3140 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3141 }
3142 }
3143 }
3144 return NULL;
3145 JVM_END
3146
3147
3148 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3149 JVMWrapper("JVM_CurrentClassLoader");
3150 ResourceMark rm(THREAD);
3151
3152 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3153
3154 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3155 bool trusted = is_trusted_frame(thread, &vfst);
3156 if (trusted) return NULL;
3157
3158 methodOop m = vfst.method();
3159 if (!m->is_native()) {
3160 klassOop holder = m->method_holder();
3161 assert(holder->is_klass(), "just checking");
3162 oop loader = instanceKlass::cast(holder)->class_loader();
3163 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3164 return JNIHandles::make_local(env, loader);
3165 }
3166 }
3167 }
3168 return NULL;
3169 JVM_END
3170
3171
3172 // Utility object for collecting method holders walking down the stack
3173 class KlassLink: public ResourceObj {
3174 public:
3175 KlassHandle klass;
3176 KlassLink* next;
3177
3178 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3179 };
3180
3181
3182 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3183 JVMWrapper("JVM_GetClassContext");
3184 ResourceMark rm(THREAD);
3185 JvmtiVMObjectAllocEventCollector oam;
3186 // Collect linked list of (handles to) method holders
3187 KlassLink* first = NULL;
3188 KlassLink* last = NULL;
3189 int depth = 0;
3190
3191 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3192 // Native frames are not returned
3193 if (!vfst.method()->is_native()) {
3194 klassOop holder = vfst.method()->method_holder();
3195 assert(holder->is_klass(), "just checking");
3196 depth++;
3197 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3198 if (first == NULL) {
3199 first = last = l;
3200 } else {
3201 last->next = l;
3202 last = l;
3203 }
3204 }
3205 }
3206
3207 // Create result array of type [Ljava/lang/Class;
3208 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3209 // Fill in mirrors corresponding to method holders
3210 int index = 0;
3211 while (first != NULL) {
3212 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3213 first = first->next;
3214 }
3215 assert(index == depth, "just checking");
3216
3217 return (jobjectArray) JNIHandles::make_local(env, result);
3218 JVM_END
3219
3220
3221 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3222 JVMWrapper("JVM_ClassDepth");
3223 ResourceMark rm(THREAD);
3224 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3225 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3226
3227 const char* str = java_lang_String::as_utf8_string(class_name_str());
3228 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3229 if (class_name_sym == NULL) {
3230 return -1;
3231 }
3232
3233 int depth = 0;
3234
3235 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3236 if (!vfst.method()->is_native()) {
3237 klassOop holder = vfst.method()->method_holder();
3238 assert(holder->is_klass(), "just checking");
3239 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3240 return depth;
3241 }
3242 depth++;
3243 }
3244 }
3245 return -1;
3246 JVM_END
3247
3248
3249 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3250 JVMWrapper("JVM_ClassLoaderDepth");
3251 ResourceMark rm(THREAD);
3252 int depth = 0;
3253 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3254 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3255 bool trusted = is_trusted_frame(thread, &vfst);
3256 if (trusted) return -1;
3257
3258 methodOop m = vfst.method();
3259 if (!m->is_native()) {
3260 klassOop holder = m->method_holder();
3261 assert(holder->is_klass(), "just checking");
3262 oop loader = instanceKlass::cast(holder)->class_loader();
3263 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3264 return depth;
3265 }
3266 depth++;
3267 }
3268 }
3269 return -1;
3270 JVM_END
3271
3272
3273 // java.lang.Package ////////////////////////////////////////////////////////////////
3274
3275
3276 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3277 JVMWrapper("JVM_GetSystemPackage");
3278 ResourceMark rm(THREAD);
3279 JvmtiVMObjectAllocEventCollector oam;
3280 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3281 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3282 return (jstring) JNIHandles::make_local(result);
3283 JVM_END
3284
3285
3286 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3287 JVMWrapper("JVM_GetSystemPackages");
3288 JvmtiVMObjectAllocEventCollector oam;
3289 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3290 return (jobjectArray) JNIHandles::make_local(result);
3291 JVM_END
3292
3293
3294 // ObjectInputStream ///////////////////////////////////////////////////////////////
3295
3296 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3297 if (current_class == NULL) {
3298 return true;
3299 }
3300 if ((current_class == field_class) || access.is_public()) {
3301 return true;
3302 }
3303
3304 if (access.is_protected()) {
3305 // See if current_class is a subclass of field_class
3306 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3307 return true;
3308 }
3309 }
3310
3311 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3312 }
3313
3314
3315 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3316 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3317 JVMWrapper("JVM_AllocateNewObject");
3318 JvmtiVMObjectAllocEventCollector oam;
3319 // Receiver is not used
3320 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3321 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3322
3323 // Cannot instantiate primitive types
3324 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3325 ResourceMark rm(THREAD);
3326 THROW_0(vmSymbols::java_lang_InvalidClassException());
3327 }
3328
3329 // Arrays not allowed here, must use JVM_AllocateNewArray
3330 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3331 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3332 ResourceMark rm(THREAD);
3333 THROW_0(vmSymbols::java_lang_InvalidClassException());
3334 }
3335
3336 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3337 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3338
3339 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3340
3341 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3342 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3343
3344 // Make sure klass is initialized, since we are about to instantiate one of them.
3345 curr_klass->initialize(CHECK_NULL);
3346
3347 methodHandle m (THREAD,
3348 init_klass->find_method(vmSymbols::object_initializer_name(),
3349 vmSymbols::void_method_signature()));
3350 if (m.is_null()) {
3351 ResourceMark rm(THREAD);
3352 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3353 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3354 vmSymbols::object_initializer_name(),
3355 vmSymbols::void_method_signature()));
3356 }
3357
3358 if (curr_klass == init_klass && !m->is_public()) {
3359 // Calling the constructor for class 'curr_klass'.
3360 // Only allow calls to a public no-arg constructor.
3361 // This path corresponds to creating an Externalizable object.
3362 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3363 }
3364
3365 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3366 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3367 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3368 }
3369
3370 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3371 // Call constructor m. This might call a constructor higher up in the hierachy
3372 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3373
3374 return JNIHandles::make_local(obj());
3375 JVM_END
3376
3377
3378 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3379 JVMWrapper("JVM_AllocateNewArray");
3380 JvmtiVMObjectAllocEventCollector oam;
3381 oop mirror = JNIHandles::resolve_non_null(currClass);
3382
3383 if (java_lang_Class::is_primitive(mirror)) {
3384 THROW_0(vmSymbols::java_lang_InvalidClassException());
3385 }
3386 klassOop k = java_lang_Class::as_klassOop(mirror);
3387 oop result;
3388
3389 if (k->klass_part()->oop_is_typeArray()) {
3390 // typeArray
3391 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3392 } else if (k->klass_part()->oop_is_objArray()) {
3393 // objArray
3394 objArrayKlassHandle oak(THREAD, k);
3395 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3396 result = oak->allocate(length, CHECK_NULL);
3397 } else {
3398 THROW_0(vmSymbols::java_lang_InvalidClassException());
3399 }
3400 return JNIHandles::make_local(env, result);
3401 JVM_END
3402
3403
3404 // Return the first non-null class loader up the execution stack, or null
3405 // if only code from the null class loader is on the stack.
3406
3407 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3408 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3409 // UseNewReflection
3410 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3411 klassOop holder = vfst.method()->method_holder();
3412 oop loader = instanceKlass::cast(holder)->class_loader();
3413 if (loader != NULL) {
3414 return JNIHandles::make_local(env, loader);
3415 }
3416 }
3417 return NULL;
3418 JVM_END
3419
3420
3421 // Load a class relative to the most recent class on the stack with a non-null
3422 // classloader.
3423 // This function has been deprecated and should not be considered part of the
3424 // specified JVM interface.
3425
3426 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3427 jclass currClass, jstring currClassName))
3428 JVMWrapper("JVM_LoadClass0");
3429 // Receiver is not used
3430 ResourceMark rm(THREAD);
3431
3432 // Class name argument is not guaranteed to be in internal format
3433 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3434 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3435
3436 const char* str = java_lang_String::as_utf8_string(string());
3437
3438 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3439 // It's impossible to create this class; the name cannot fit
3440 // into the constant pool.
3441 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3442 }
3443
3444 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3445 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3446 // Find the most recent class on the stack with a non-null classloader
3447 oop loader = NULL;
3448 oop protection_domain = NULL;
3449 if (curr_klass.is_null()) {
3450 for (vframeStream vfst(thread);
3451 !vfst.at_end() && loader == NULL;
3452 vfst.next()) {
3453 if (!vfst.method()->is_native()) {
3454 klassOop holder = vfst.method()->method_holder();
3455 loader = instanceKlass::cast(holder)->class_loader();
3456 protection_domain = instanceKlass::cast(holder)->protection_domain();
3457 }
3458 }
3459 } else {
3460 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3461 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3462 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3463 }
3464 Handle h_loader(THREAD, loader);
3465 Handle h_prot (THREAD, protection_domain);
3466 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3467 false, thread);
3468 if (TraceClassResolution && result != NULL) {
3469 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3470 }
3471 return result;
3472 JVM_END
3473
3474
3475 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3476
3477
3478 // resolve array handle and check arguments
3479 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3480 if (arr == NULL) {
3481 THROW_0(vmSymbols::java_lang_NullPointerException());
3482 }
3483 oop a = JNIHandles::resolve_non_null(arr);
3484 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3485 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3486 }
3487 return arrayOop(a);
3488 }
3489
3490
3491 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3492 JVMWrapper("JVM_GetArrayLength");
3493 arrayOop a = check_array(env, arr, false, CHECK_0);
3494 return a->length();
3495 JVM_END
3496
3497
3498 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3499 JVMWrapper("JVM_Array_Get");
3500 JvmtiVMObjectAllocEventCollector oam;
3501 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3502 jvalue value;
3503 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3504 oop box = Reflection::box(&value, type, CHECK_NULL);
3505 return JNIHandles::make_local(env, box);
3506 JVM_END
3507
3508
3509 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3510 JVMWrapper("JVM_GetPrimitiveArrayElement");
3511 jvalue value;
3512 value.i = 0; // to initialize value before getting used in CHECK
3513 arrayOop a = check_array(env, arr, true, CHECK_(value));
3514 assert(a->is_typeArray(), "just checking");
3515 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3516 BasicType wide_type = (BasicType) wCode;
3517 if (type != wide_type) {
3518 Reflection::widen(&value, type, wide_type, CHECK_(value));
3519 }
3520 return value;
3521 JVM_END
3522
3523
3524 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3525 JVMWrapper("JVM_SetArrayElement");
3526 arrayOop a = check_array(env, arr, false, CHECK);
3527 oop box = JNIHandles::resolve(val);
3528 jvalue value;
3529 value.i = 0; // to initialize value before getting used in CHECK
3530 BasicType value_type;
3531 if (a->is_objArray()) {
3532 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3533 value_type = Reflection::unbox_for_regular_object(box, &value);
3534 } else {
3535 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3536 }
3537 Reflection::array_set(&value, a, index, value_type, CHECK);
3538 JVM_END
3539
3540
3541 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3542 JVMWrapper("JVM_SetPrimitiveArrayElement");
3543 arrayOop a = check_array(env, arr, true, CHECK);
3544 assert(a->is_typeArray(), "just checking");
3545 BasicType value_type = (BasicType) vCode;
3546 Reflection::array_set(&v, a, index, value_type, CHECK);
3547 JVM_END
3548
3549
3550 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3551 JVMWrapper("JVM_NewArray");
3552 JvmtiVMObjectAllocEventCollector oam;
3553 oop element_mirror = JNIHandles::resolve(eltClass);
3554 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3555 return JNIHandles::make_local(env, result);
3556 JVM_END
3557
3558
3559 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3560 JVMWrapper("JVM_NewMultiArray");
3561 JvmtiVMObjectAllocEventCollector oam;
3562 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3563 oop element_mirror = JNIHandles::resolve(eltClass);
3564 assert(dim_array->is_typeArray(), "just checking");
3565 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3566 return JNIHandles::make_local(env, result);
3567 JVM_END
3568
3569
3570 // Networking library support ////////////////////////////////////////////////////////////////////
3571
3572 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3573 JVMWrapper("JVM_InitializeSocketLibrary");
3574 return 0;
3575 JVM_END
3576
3577
3578 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3579 JVMWrapper("JVM_Socket");
3580 return os::socket(domain, type, protocol);
3581 JVM_END
3582
3583
3584 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3585 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3586 //%note jvm_r6
3587 return os::socket_close(fd);
3588 JVM_END
3589
3590
3591 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3592 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3593 //%note jvm_r6
3594 return os::socket_shutdown(fd, howto);
3595 JVM_END
3596
3597
3598 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3599 JVMWrapper2("JVM_Recv (0x%x)", fd);
3600 //%note jvm_r6
3601 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3602 JVM_END
3603
3604
3605 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3606 JVMWrapper2("JVM_Send (0x%x)", fd);
3607 //%note jvm_r6
3608 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3609 JVM_END
3610
3611
3612 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3613 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3614 //%note jvm_r6
3615 return os::timeout(fd, timeout);
3616 JVM_END
3617
3618
3619 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3620 JVMWrapper2("JVM_Listen (0x%x)", fd);
3621 //%note jvm_r6
3622 return os::listen(fd, count);
3623 JVM_END
3624
3625
3626 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3627 JVMWrapper2("JVM_Connect (0x%x)", fd);
3628 //%note jvm_r6
3629 return os::connect(fd, him, (socklen_t)len);
3630 JVM_END
3631
3632
3633 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3634 JVMWrapper2("JVM_Bind (0x%x)", fd);
3635 //%note jvm_r6
3636 return os::bind(fd, him, (socklen_t)len);
3637 JVM_END
3638
3639
3640 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3641 JVMWrapper2("JVM_Accept (0x%x)", fd);
3642 //%note jvm_r6
3643 socklen_t socklen = (socklen_t)(*len);
3644 jint result = os::accept(fd, him, &socklen);
3645 *len = (jint)socklen;
3646 return result;
3647 JVM_END
3648
3649
3650 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3651 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3652 //%note jvm_r6
3653 socklen_t socklen = (socklen_t)(*fromlen);
3654 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3655 *fromlen = (int)socklen;
3656 return result;
3657 JVM_END
3658
3659
3660 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3661 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3662 //%note jvm_r6
3663 socklen_t socklen = (socklen_t)(*len);
3664 jint result = os::get_sock_name(fd, him, &socklen);
3665 *len = (int)socklen;
3666 return result;
3667 JVM_END
3668
3669
3670 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3671 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3672 //%note jvm_r6
3673 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3674 JVM_END
3675
3676
3677 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3678 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3679 //%note jvm_r6
3680 return os::socket_available(fd, pbytes);
3681 JVM_END
3682
3683
3684 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3685 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3686 //%note jvm_r6
3687 socklen_t socklen = (socklen_t)(*optlen);
3688 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3689 *optlen = (int)socklen;
3690 return result;
3691 JVM_END
3692
3693
3694 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3695 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3696 //%note jvm_r6
3697 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3698 JVM_END
3699
3700
3701 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3702 JVMWrapper("JVM_GetHostName");
3703 return os::get_host_name(name, namelen);
3704 JVM_END
3705
3706
3707 // Library support ///////////////////////////////////////////////////////////////////////////
3708
3709 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3710 //%note jvm_ct
3711 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3712 char ebuf[1024];
3713 void *load_result;
3714 {
3715 ThreadToNativeFromVM ttnfvm(thread);
3716 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3717 }
3718 if (load_result == NULL) {
3719 char msg[1024];
3720 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3721 // Since 'ebuf' may contain a string encoded using
3722 // platform encoding scheme, we need to pass
3723 // Exceptions::unsafe_to_utf8 to the new_exception method
3724 // as the last argument. See bug 6367357.
3725 Handle h_exception =
3726 Exceptions::new_exception(thread,
3727 vmSymbols::java_lang_UnsatisfiedLinkError(),
3728 msg, Exceptions::unsafe_to_utf8);
3729
3730 THROW_HANDLE_0(h_exception);
3731 }
3732 return load_result;
3733 JVM_END
3734
3735
3736 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3737 JVMWrapper("JVM_UnloadLibrary");
3738 os::dll_unload(handle);
3739 JVM_END
3740
3741
3742 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3743 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3744 return os::dll_lookup(handle, name);
3745 JVM_END
3746
3747
3748 // Floating point support ////////////////////////////////////////////////////////////////////
3749
3750 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3751 JVMWrapper("JVM_IsNaN");
3752 return g_isnan(a);
3753 JVM_END
3754
3755
3756 // JNI version ///////////////////////////////////////////////////////////////////////////////
3757
3758 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3759 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3760 return Threads::is_supported_jni_version_including_1_1(version);
3761 JVM_END
3762
3763
3764 // String support ///////////////////////////////////////////////////////////////////////////
3765
3766 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3767 JVMWrapper("JVM_InternString");
3768 JvmtiVMObjectAllocEventCollector oam;
3769 if (str == NULL) return NULL;
3770 oop string = JNIHandles::resolve_non_null(str);
3771 oop result = StringTable::intern(string, CHECK_NULL);
3772 return (jstring) JNIHandles::make_local(env, result);
3773 JVM_END
3774
3775
3776 // Raw monitor support //////////////////////////////////////////////////////////////////////
3777
3778 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3779 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3780 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3781 // that only works with java threads.
3782
3783
3784 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3785 VM_Exit::block_if_vm_exited();
3786 JVMWrapper("JVM_RawMonitorCreate");
3787 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3788 }
3789
3790
3791 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3792 VM_Exit::block_if_vm_exited();
3793 JVMWrapper("JVM_RawMonitorDestroy");
3794 delete ((Mutex*) mon);
3795 }
3796
3797
3798 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3799 VM_Exit::block_if_vm_exited();
3800 JVMWrapper("JVM_RawMonitorEnter");
3801 ((Mutex*) mon)->jvm_raw_lock();
3802 return 0;
3803 }
3804
3805
3806 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3807 VM_Exit::block_if_vm_exited();
3808 JVMWrapper("JVM_RawMonitorExit");
3809 ((Mutex*) mon)->jvm_raw_unlock();
3810 }
3811
3812
3813 // Support for Serialization
3814
3815 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3816 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3817 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3818 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3819
3820 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3821 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3822 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3823 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3824
3825
3826 void initialize_converter_functions() {
3827 if (JDK_Version::is_gte_jdk14x_version()) {
3828 // These functions only exist for compatibility with 1.3.1 and earlier
3829 return;
3830 }
3831
3832 // called from universe_post_init()
3833 assert(
3834 int_bits_to_float_fn == NULL &&
3835 long_bits_to_double_fn == NULL &&
3836 float_to_int_bits_fn == NULL &&
3837 double_to_long_bits_fn == NULL ,
3838 "initialization done twice"
3839 );
3840 // initialize
3841 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3842 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3843 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3844 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3845 // verify
3846 assert(
3847 int_bits_to_float_fn != NULL &&
3848 long_bits_to_double_fn != NULL &&
3849 float_to_int_bits_fn != NULL &&
3850 double_to_long_bits_fn != NULL ,
3851 "initialization failed"
3852 );
3853 }
3854
3855
3856 // Serialization
3857 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3858 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3859 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3860
3861 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3862 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3863 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3864 oop o = JNIHandles::resolve(obj);
3865
3866 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3867 THROW(vmSymbols::java_lang_NullPointerException());
3868 }
3869
3870 jsize nfids = fids->length();
3871 if (nfids == 0) return;
3872
3873 if (tcodes->length() < nfids) {
3874 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3875 }
3876
3877 jsize off = 0;
3878 /* loop through fields, setting values */
3879 for (jsize i = 0; i < nfids; i++) {
3880 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3881 int field_offset;
3882 if (fid != NULL) {
3883 // NULL is a legal value for fid, but retrieving the field offset
3884 // trigger assertion in that case
3885 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3886 }
3887
3888 switch (tcodes->char_at(i)) {
3889 case 'Z':
3890 if (fid != NULL) {
3891 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3892 o->bool_field_put(field_offset, val);
3893 }
3894 off++;
3895 break;
3896
3897 case 'B':
3898 if (fid != NULL) {
3899 o->byte_field_put(field_offset, dbuf->byte_at(off));
3900 }
3901 off++;
3902 break;
3903
3904 case 'C':
3905 if (fid != NULL) {
3906 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3907 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3908 o->char_field_put(field_offset, val);
3909 }
3910 off += 2;
3911 break;
3912
3913 case 'S':
3914 if (fid != NULL) {
3915 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3916 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3917 o->short_field_put(field_offset, val);
3918 }
3919 off += 2;
3920 break;
3921
3922 case 'I':
3923 if (fid != NULL) {
3924 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3925 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3926 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3927 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3928 o->int_field_put(field_offset, ival);
3929 }
3930 off += 4;
3931 break;
3932
3933 case 'F':
3934 if (fid != NULL) {
3935 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3936 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3937 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3938 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3939 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3940 o->float_field_put(field_offset, fval);
3941 }
3942 off += 4;
3943 break;
3944
3945 case 'J':
3946 if (fid != NULL) {
3947 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3948 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3949 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3950 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3951 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3952 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3953 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3954 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3955 o->long_field_put(field_offset, lval);
3956 }
3957 off += 8;
3958 break;
3959
3960 case 'D':
3961 if (fid != NULL) {
3962 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3963 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3964 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3965 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3966 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3967 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3968 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3969 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3970 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3971 o->double_field_put(field_offset, dval);
3972 }
3973 off += 8;
3974 break;
3975
3976 default:
3977 // Illegal typecode
3978 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3979 }
3980 }
3981 JVM_END
3982
3983
3984 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3985 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3986 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3987
3988 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3989 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3990 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3991 oop o = JNIHandles::resolve(obj);
3992
3993 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3994 THROW(vmSymbols::java_lang_NullPointerException());
3995 }
3996
3997 jsize nfids = fids->length();
3998 if (nfids == 0) return;
3999
4000 if (tcodes->length() < nfids) {
4001 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4002 }
4003
4004 /* loop through fields, fetching values */
4005 jsize off = 0;
4006 for (jsize i = 0; i < nfids; i++) {
4007 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4008 if (fid == NULL) {
4009 THROW(vmSymbols::java_lang_NullPointerException());
4010 }
4011 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4012
4013 switch (tcodes->char_at(i)) {
4014 case 'Z':
4015 {
4016 jboolean val = o->bool_field(field_offset);
4017 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4018 }
4019 break;
4020
4021 case 'B':
4022 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4023 break;
4024
4025 case 'C':
4026 {
4027 jchar val = o->char_field(field_offset);
4028 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4029 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4030 }
4031 break;
4032
4033 case 'S':
4034 {
4035 jshort val = o->short_field(field_offset);
4036 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4037 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4038 }
4039 break;
4040
4041 case 'I':
4042 {
4043 jint val = o->int_field(field_offset);
4044 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4045 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4046 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4047 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4048 }
4049 break;
4050
4051 case 'F':
4052 {
4053 jfloat fval = o->float_field(field_offset);
4054 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4055 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4056 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4057 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4058 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4059 }
4060 break;
4061
4062 case 'J':
4063 {
4064 jlong val = o->long_field(field_offset);
4065 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4066 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4067 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4068 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4069 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4070 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4071 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4072 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4073 }
4074 break;
4075
4076 case 'D':
4077 {
4078 jdouble dval = o->double_field(field_offset);
4079 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4080 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4081 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4082 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4083 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4084 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4085 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4086 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4087 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4088 }
4089 break;
4090
4091 default:
4092 // Illegal typecode
4093 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4094 }
4095 }
4096 JVM_END
4097
4098
4099 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4100
4101 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4102 // Security Note:
4103 // The Java level wrapper will perform the necessary security check allowing
4104 // us to pass the NULL as the initiating class loader.
4105 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4106
4107 KlassHandle klass_handle(THREAD, klass);
4108 // Check if we should initialize the class
4109 if (init && klass_handle->oop_is_instance()) {
4110 klass_handle->initialize(CHECK_NULL);
4111 }
4112 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4113 }
4114
4115
4116 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4117
4118 #ifndef PRODUCT
4119
4120 extern "C" {
4121 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4122 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4123 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4124 }
4125
4126 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4127 JVMWrapper("JVM_AccessBoolVMFlag");
4128 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4129 JVM_END
4130
4131 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4132 JVMWrapper("JVM_AccessVMIntFlag");
4133 intx v;
4134 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4135 *value = (jint)v;
4136 return result;
4137 JVM_END
4138
4139
4140 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4141 JVMWrapper("JVM_VMBreakPoint");
4142 oop the_obj = JNIHandles::resolve(obj);
4143 BREAKPOINT;
4144 JVM_END
4145
4146
4147 #endif
4148
4149
4150 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4151
4152 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4153 JVMWrapper("JVM_InvokeMethod");
4154 Handle method_handle;
4155 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4156 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4157 Handle receiver(THREAD, JNIHandles::resolve(obj));
4158 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4159 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4160 jobject res = JNIHandles::make_local(env, result);
4161 if (JvmtiExport::should_post_vm_object_alloc()) {
4162 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4163 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4164 if (java_lang_Class::is_primitive(ret_type)) {
4165 // Only for primitive type vm allocates memory for java object.
4166 // See box() method.
4167 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4168 }
4169 }
4170 return res;
4171 } else {
4172 THROW_0(vmSymbols::java_lang_StackOverflowError());
4173 }
4174 JVM_END
4175
4176
4177 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4178 JVMWrapper("JVM_NewInstanceFromConstructor");
4179 oop constructor_mirror = JNIHandles::resolve(c);
4180 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4181 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4182 jobject res = JNIHandles::make_local(env, result);
4183 if (JvmtiExport::should_post_vm_object_alloc()) {
4184 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4185 }
4186 return res;
4187 JVM_END
4188
4189 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4190
4191 JVM_LEAF(jboolean, JVM_SupportsCX8())
4192 JVMWrapper("JVM_SupportsCX8");
4193 return VM_Version::supports_cx8();
4194 JVM_END
4195
4196
4197 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4198 JVMWrapper("JVM_CX8Field");
4199 jlong res;
4200 oop o = JNIHandles::resolve(obj);
4201 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4202 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4203
4204 assert(VM_Version::supports_cx8(), "cx8 not supported");
4205 res = Atomic::cmpxchg(newVal, addr, oldVal);
4206
4207 return res == oldVal;
4208 JVM_END
4209
4210 // DTrace ///////////////////////////////////////////////////////////////////
4211
4212 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4213 JVMWrapper("JVM_DTraceGetVersion");
4214 return (jint)JVM_TRACING_DTRACE_VERSION;
4215 JVM_END
4216
4217 JVM_ENTRY(jlong,JVM_DTraceActivate(
4218 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4219 JVM_DTraceProvider* providers))
4220 JVMWrapper("JVM_DTraceActivate");
4221 return DTraceJSDT::activate(
4222 version, module_name, providers_count, providers, CHECK_0);
4223 JVM_END
4224
4225 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4226 JVMWrapper("JVM_DTraceIsProbeEnabled");
4227 return DTraceJSDT::is_probe_enabled(method);
4228 JVM_END
4229
4230 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4231 JVMWrapper("JVM_DTraceDispose");
4232 DTraceJSDT::dispose(handle);
4233 JVM_END
4234
4235 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4236 JVMWrapper("JVM_DTraceIsSupported");
4237 return DTraceJSDT::is_supported();
4238 JVM_END
4239
4240 // Returns an array of all live Thread objects (VM internal JavaThreads,
4241 // jvmti agent threads, and JNI attaching threads are skipped)
4242 // See CR 6404306 regarding JNI attaching threads
4243 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4244 ResourceMark rm(THREAD);
4245 ThreadsListEnumerator tle(THREAD, false, false);
4246 JvmtiVMObjectAllocEventCollector oam;
4247
4248 int num_threads = tle.num_threads();
4249 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4250 objArrayHandle threads_ah(THREAD, r);
4251
4252 for (int i = 0; i < num_threads; i++) {
4253 Handle h = tle.get_threadObj(i);
4254 threads_ah->obj_at_put(i, h());
4255 }
4256
4257 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4258 JVM_END
4259
4260
4261 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4262 // Return StackTraceElement[][], each element is the stack trace of a thread in
4263 // the corresponding entry in the given threads array
4264 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4265 JVMWrapper("JVM_DumpThreads");
4266 JvmtiVMObjectAllocEventCollector oam;
4267
4268 // Check if threads is null
4269 if (threads == NULL) {
4270 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4271 }
4272
4273 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4274 objArrayHandle ah(THREAD, a);
4275 int num_threads = ah->length();
4276 // check if threads is non-empty array
4277 if (num_threads == 0) {
4278 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4279 }
4280
4281 // check if threads is not an array of objects of Thread class
4282 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4283 if (k != SystemDictionary::Thread_klass()) {
4284 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4285 }
4286
4287 ResourceMark rm(THREAD);
4288
4289 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4290 for (int i = 0; i < num_threads; i++) {
4291 oop thread_obj = ah->obj_at(i);
4292 instanceHandle h(THREAD, (instanceOop) thread_obj);
4293 thread_handle_array->append(h);
4294 }
4295
4296 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4297 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4298
4299 JVM_END
4300
4301 // JVM monitoring and management support
4302 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4303 return Management::get_jmm_interface(version);
4304 JVM_END
4305
4306 // com.sun.tools.attach.VirtualMachine agent properties support
4307 //
4308 // Initialize the agent properties with the properties maintained in the VM
4309 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4310 JVMWrapper("JVM_InitAgentProperties");
4311 ResourceMark rm;
4312
4313 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4314
4315 PUTPROP(props, "sun.java.command", Arguments::java_command());
4316 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4317 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4318 return properties;
4319 JVM_END
4320
4321 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4322 {
4323 JVMWrapper("JVM_GetEnclosingMethodInfo");
4324 JvmtiVMObjectAllocEventCollector oam;
4325
4326 if (ofClass == NULL) {
4327 return NULL;
4328 }
4329 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4330 // Special handling for primitive objects
4331 if (java_lang_Class::is_primitive(mirror())) {
4332 return NULL;
4333 }
4334 klassOop k = java_lang_Class::as_klassOop(mirror());
4335 if (!Klass::cast(k)->oop_is_instance()) {
4336 return NULL;
4337 }
4338 instanceKlassHandle ik_h(THREAD, k);
4339 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4340 if (encl_method_class_idx == 0) {
4341 return NULL;
4342 }
4343 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4344 objArrayHandle dest(THREAD, dest_o);
4345 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4346 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4347 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4348 if (encl_method_method_idx != 0) {
4349 Symbol* sym = ik_h->constants()->symbol_at(
4350 extract_low_short_from_int(
4351 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4352 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4353 dest->obj_at_put(1, str());
4354 sym = ik_h->constants()->symbol_at(
4355 extract_high_short_from_int(
4356 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4357 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4358 dest->obj_at_put(2, str());
4359 }
4360 return (jobjectArray) JNIHandles::make_local(dest());
4361 }
4362 JVM_END
4363
4364 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4365 jint javaThreadState))
4366 {
4367 // If new thread states are added in future JDK and VM versions,
4368 // this should check if the JDK version is compatible with thread
4369 // states supported by the VM. Return NULL if not compatible.
4370 //
4371 // This function must map the VM java_lang_Thread::ThreadStatus
4372 // to the Java thread state that the JDK supports.
4373 //
4374
4375 typeArrayHandle values_h;
4376 switch (javaThreadState) {
4377 case JAVA_THREAD_STATE_NEW : {
4378 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4379 values_h = typeArrayHandle(THREAD, r);
4380 values_h->int_at_put(0, java_lang_Thread::NEW);
4381 break;
4382 }
4383 case JAVA_THREAD_STATE_RUNNABLE : {
4384 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4385 values_h = typeArrayHandle(THREAD, r);
4386 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_BLOCKED : {
4390 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4391 values_h = typeArrayHandle(THREAD, r);
4392 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_WAITING : {
4396 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4397 values_h = typeArrayHandle(THREAD, r);
4398 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4399 values_h->int_at_put(1, java_lang_Thread::PARKED);
4400 break;
4401 }
4402 case JAVA_THREAD_STATE_TIMED_WAITING : {
4403 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4404 values_h = typeArrayHandle(THREAD, r);
4405 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4406 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4407 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4408 break;
4409 }
4410 case JAVA_THREAD_STATE_TERMINATED : {
4411 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4412 values_h = typeArrayHandle(THREAD, r);
4413 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4414 break;
4415 }
4416 default:
4417 // Unknown state - probably incompatible JDK version
4418 return NULL;
4419 }
4420
4421 return (jintArray) JNIHandles::make_local(env, values_h());
4422 }
4423 JVM_END
4424
4425
4426 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4427 jint javaThreadState,
4428 jintArray values))
4429 {
4430 // If new thread states are added in future JDK and VM versions,
4431 // this should check if the JDK version is compatible with thread
4432 // states supported by the VM. Return NULL if not compatible.
4433 //
4434 // This function must map the VM java_lang_Thread::ThreadStatus
4435 // to the Java thread state that the JDK supports.
4436 //
4437
4438 ResourceMark rm;
4439
4440 // Check if threads is null
4441 if (values == NULL) {
4442 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4443 }
4444
4445 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4446 typeArrayHandle values_h(THREAD, v);
4447
4448 objArrayHandle names_h;
4449 switch (javaThreadState) {
4450 case JAVA_THREAD_STATE_NEW : {
4451 assert(values_h->length() == 1 &&
4452 values_h->int_at(0) == java_lang_Thread::NEW,
4453 "Invalid threadStatus value");
4454
4455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4456 1, /* only 1 substate */
4457 CHECK_NULL);
4458 names_h = objArrayHandle(THREAD, r);
4459 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4460 names_h->obj_at_put(0, name());
4461 break;
4462 }
4463 case JAVA_THREAD_STATE_RUNNABLE : {
4464 assert(values_h->length() == 1 &&
4465 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4466 "Invalid threadStatus value");
4467
4468 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4469 1, /* only 1 substate */
4470 CHECK_NULL);
4471 names_h = objArrayHandle(THREAD, r);
4472 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4473 names_h->obj_at_put(0, name());
4474 break;
4475 }
4476 case JAVA_THREAD_STATE_BLOCKED : {
4477 assert(values_h->length() == 1 &&
4478 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4479 "Invalid threadStatus value");
4480
4481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4482 1, /* only 1 substate */
4483 CHECK_NULL);
4484 names_h = objArrayHandle(THREAD, r);
4485 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4486 names_h->obj_at_put(0, name());
4487 break;
4488 }
4489 case JAVA_THREAD_STATE_WAITING : {
4490 assert(values_h->length() == 2 &&
4491 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4492 values_h->int_at(1) == java_lang_Thread::PARKED,
4493 "Invalid threadStatus value");
4494 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4495 2, /* number of substates */
4496 CHECK_NULL);
4497 names_h = objArrayHandle(THREAD, r);
4498 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4499 CHECK_NULL);
4500 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4501 CHECK_NULL);
4502 names_h->obj_at_put(0, name0());
4503 names_h->obj_at_put(1, name1());
4504 break;
4505 }
4506 case JAVA_THREAD_STATE_TIMED_WAITING : {
4507 assert(values_h->length() == 3 &&
4508 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4509 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4510 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4511 "Invalid threadStatus value");
4512 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4513 3, /* number of substates */
4514 CHECK_NULL);
4515 names_h = objArrayHandle(THREAD, r);
4516 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4517 CHECK_NULL);
4518 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4519 CHECK_NULL);
4520 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4521 CHECK_NULL);
4522 names_h->obj_at_put(0, name0());
4523 names_h->obj_at_put(1, name1());
4524 names_h->obj_at_put(2, name2());
4525 break;
4526 }
4527 case JAVA_THREAD_STATE_TERMINATED : {
4528 assert(values_h->length() == 1 &&
4529 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4530 "Invalid threadStatus value");
4531 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4532 1, /* only 1 substate */
4533 CHECK_NULL);
4534 names_h = objArrayHandle(THREAD, r);
4535 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4536 names_h->obj_at_put(0, name());
4537 break;
4538 }
4539 default:
4540 // Unknown state - probably incompatible JDK version
4541 return NULL;
4542 }
4543 return (jobjectArray) JNIHandles::make_local(env, names_h());
4544 }
4545 JVM_END
4546
4547 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4548 {
4549 memset(info, 0, sizeof(info_size));
4550
4551 info->jvm_version = Abstract_VM_Version::jvm_version();
4552 info->update_version = 0; /* 0 in HotSpot Express VM */
4553 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4554
4555 // when we add a new capability in the jvm_version_info struct, we should also
4556 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4557 // counter defined in runtimeService.cpp.
4558 info->is_attachable = AttachListener::is_attach_supported();
4559 }
4560 JVM_END