1 /*
2 * Copyright (c) 1997, 2014, 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 // The current thread already owns the monitor and it has not yet
532 // been added to the wait queue so the current thread cannot be
533 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
534 // event handler cannot accidentally consume an unpark() meant for
535 // the ParkEvent associated with this ObjectMonitor.
536 }
537 ObjectSynchronizer::wait(obj, ms, THREAD);
538 JVM_END
539
540
541 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
542 JVMWrapper("JVM_MonitorNotify");
543 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
544 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
545 ObjectSynchronizer::notify(obj, CHECK);
546 JVM_END
547
548
549 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
550 JVMWrapper("JVM_MonitorNotifyAll");
551 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
552 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
553 ObjectSynchronizer::notifyall(obj, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
558 JVMWrapper("JVM_Clone");
559 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
560 const KlassHandle klass (THREAD, obj->klass());
561 JvmtiVMObjectAllocEventCollector oam;
562
563 #ifdef ASSERT
564 // Just checking that the cloneable flag is set correct
565 if (obj->is_javaArray()) {
566 guarantee(klass->is_cloneable(), "all arrays are cloneable");
567 } else {
568 guarantee(obj->is_instance(), "should be instanceOop");
569 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
570 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
571 }
572 #endif
573
574 // Check if class of obj supports the Cloneable interface.
575 // All arrays are considered to be cloneable (See JLS 20.1.5)
576 if (!klass->is_cloneable()) {
577 ResourceMark rm(THREAD);
578 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
579 }
580
581 // Make shallow object copy
582 const int size = obj->size();
583 oop new_obj = NULL;
584 if (obj->is_javaArray()) {
585 const int length = ((arrayOop)obj())->length();
586 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
587 } else {
588 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
589 }
590 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
591 // is modifying a reference field in the clonee, a non-oop-atomic copy might
592 // be suspended in the middle of copying the pointer and end up with parts
593 // of two different pointers in the field. Subsequent dereferences will crash.
594 // 4846409: an oop-copy of objects with long or double fields or arrays of same
595 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
596 // of oops. We know objects are aligned on a minimum of an jlong boundary.
597 // The same is true of StubRoutines::object_copy and the various oop_copy
598 // variants, and of the code generated by the inline_native_clone intrinsic.
599 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
600 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
601 (size_t)align_object_size(size) / HeapWordsPerLong);
602 // Clear the header
603 new_obj->init_mark();
604
605 // Store check (mark entire object and let gc sort it out)
606 BarrierSet* bs = Universe::heap()->barrier_set();
607 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
608 bs->write_region(MemRegion((HeapWord*)new_obj, size));
609
610 // Caution: this involves a java upcall, so the clone should be
611 // "gc-robust" by this stage.
612 if (klass->has_finalizer()) {
613 assert(obj->is_instance(), "should be instanceOop");
614 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
615 }
616
617 return JNIHandles::make_local(env, oop(new_obj));
618 JVM_END
619
620 // java.lang.Compiler ////////////////////////////////////////////////////
621
622 // The initial cuts of the HotSpot VM will not support JITs, and all existing
623 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
624 // functions are all silently ignored unless JVM warnings are printed.
625
626 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
627 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
628 JVM_END
629
630
631 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
632 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
633 return JNI_FALSE;
634 JVM_END
635
636
637 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
638 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
639 return JNI_FALSE;
640 JVM_END
641
642
643 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
644 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
645 return JNI_FALSE;
646 JVM_END
647
648
649 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
650 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
651 return NULL;
652 JVM_END
653
654
655 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
656 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
657 JVM_END
658
659
660 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
661 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
662 JVM_END
663
664
665
666 // Error message support //////////////////////////////////////////////////////
667
668 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
669 JVMWrapper("JVM_GetLastErrorString");
670 return (jint)os::lasterror(buf, len);
671 JVM_END
672
673
674 // java.io.File ///////////////////////////////////////////////////////////////
675
676 JVM_LEAF(char*, JVM_NativePath(char* path))
677 JVMWrapper2("JVM_NativePath (%s)", path);
678 return os::native_path(path);
679 JVM_END
680
681
682 // Misc. class handling ///////////////////////////////////////////////////////////
683
684
685 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
686 JVMWrapper("JVM_GetCallerClass");
687 klassOop k = thread->security_get_caller_class(depth);
688 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
689 JVM_END
690
691
692 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
693 JVMWrapper("JVM_FindPrimitiveClass");
694 oop mirror = NULL;
695 BasicType t = name2type(utf);
696 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
697 mirror = Universe::java_mirror(t);
698 }
699 if (mirror == NULL) {
700 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
701 } else {
702 return (jclass) JNIHandles::make_local(env, mirror);
703 }
704 JVM_END
705
706
707 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
708 JVMWrapper("JVM_ResolveClass");
709 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
710 JVM_END
711
712
713 // Returns a class loaded by the bootstrap class loader; or null
714 // if not found. ClassNotFoundException is not thrown.
715 //
716 // Rationale behind JVM_FindClassFromBootLoader
717 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
718 // b> because of (a) java.dll has a direct dependecy on the unexported
719 // private symbol "_JVM_FindClassFromClassLoader@20".
720 // c> the launcher cannot use the private symbol as it dynamically opens
721 // the entry point, so if something changes, the launcher will fail
722 // unexpectedly at runtime, it is safest for the launcher to dlopen a
723 // stable exported interface.
724 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
725 // signature to change from _JVM_FindClassFromClassLoader@20 to
726 // JVM_FindClassFromClassLoader and will not be backward compatible
727 // with older JDKs.
728 // Thus a public/stable exported entry point is the right solution,
729 // public here means public in linker semantics, and is exported only
730 // to the JDK, and is not intended to be a public API.
731
732 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
733 const char* name))
734 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
735
736 // Java libraries should ensure that name is never null...
737 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
738 // It's impossible to create this class; the name cannot fit
739 // into the constant pool.
740 return NULL;
741 }
742
743 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
744 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
745 if (k == NULL) {
746 return NULL;
747 }
748
749 if (TraceClassResolution) {
750 trace_class_resolution(k);
751 }
752 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
753 JVM_END
754
755 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
756 jboolean init, jobject loader,
757 jboolean throwError))
758 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
759 throwError ? "error" : "exception");
760 // Java libraries should ensure that name is never null...
761 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
762 // It's impossible to create this class; the name cannot fit
763 // into the constant pool.
764 if (throwError) {
765 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
766 } else {
767 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
768 }
769 }
770 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
771 Handle h_loader(THREAD, JNIHandles::resolve(loader));
772 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
773 Handle(), throwError, THREAD);
774
775 if (TraceClassResolution && result != NULL) {
776 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
777 }
778 return result;
779 JVM_END
780
781
782 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
783 jboolean init, jclass from))
784 JVMWrapper2("JVM_FindClassFromClass %s", name);
785 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
786 // It's impossible to create this class; the name cannot fit
787 // into the constant pool.
788 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
789 }
790 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
791 oop from_class_oop = JNIHandles::resolve(from);
792 klassOop from_class = (from_class_oop == NULL)
793 ? (klassOop)NULL
794 : java_lang_Class::as_klassOop(from_class_oop);
795 oop class_loader = NULL;
796 oop protection_domain = NULL;
797 if (from_class != NULL) {
798 class_loader = Klass::cast(from_class)->class_loader();
799 protection_domain = Klass::cast(from_class)->protection_domain();
800 }
801 Handle h_loader(THREAD, class_loader);
802 Handle h_prot (THREAD, protection_domain);
803 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
804 h_prot, true, thread);
805
806 if (TraceClassResolution && result != NULL) {
807 // this function is generally only used for class loading during verification.
808 ResourceMark rm;
809 oop from_mirror = JNIHandles::resolve_non_null(from);
810 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
811 const char * from_name = Klass::cast(from_class)->external_name();
812
813 oop mirror = JNIHandles::resolve_non_null(result);
814 klassOop to_class = java_lang_Class::as_klassOop(mirror);
815 const char * to = Klass::cast(to_class)->external_name();
816 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
817 }
818
819 return result;
820 JVM_END
821
822 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
823 if (loader.is_null()) {
824 return;
825 }
826
827 // check whether the current caller thread holds the lock or not.
828 // If not, increment the corresponding counter
829 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
830 ObjectSynchronizer::owner_self) {
831 counter->inc();
832 }
833 }
834
835 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
836 // and JVM_DefineClassWithSourceCond()
837 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
838 jobject loader, const jbyte *buf,
839 jsize len, jobject pd, const char *source,
840 jboolean verify, TRAPS) {
841 if (source == NULL) source = "__JVM_DefineClass__";
842
843 assert(THREAD->is_Java_thread(), "must be a JavaThread");
844 JavaThread* jt = (JavaThread*) THREAD;
845
846 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
847 ClassLoader::perf_define_appclass_selftime(),
848 ClassLoader::perf_define_appclasses(),
849 jt->get_thread_stat()->perf_recursion_counts_addr(),
850 jt->get_thread_stat()->perf_timers_addr(),
851 PerfClassTraceTime::DEFINE_CLASS);
852
853 if (UsePerfData) {
854 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
855 }
856
857 // Since exceptions can be thrown, class initialization can take place
858 // if name is NULL no check for class name in .class stream has to be made.
859 TempNewSymbol class_name = NULL;
860 if (name != NULL) {
861 const int str_len = (int)strlen(name);
862 if (str_len > Symbol::max_length()) {
863 // It's impossible to create this class; the name cannot fit
864 // into the constant pool.
865 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
866 }
867 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
868 }
869
870 ResourceMark rm(THREAD);
871 ClassFileStream st((u1*) buf, len, (char *)source);
872 Handle class_loader (THREAD, JNIHandles::resolve(loader));
873 if (UsePerfData) {
874 is_lock_held_by_thread(class_loader,
875 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
876 THREAD);
877 }
878 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
879 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
880 protection_domain, &st,
881 verify != 0,
882 CHECK_NULL);
883
884 if (TraceClassResolution && k != NULL) {
885 trace_class_resolution(k);
886 }
887
888 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
889 }
890
891
892 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
893 JVMWrapper2("JVM_DefineClass %s", name);
894
895 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
896 JVM_END
897
898
899 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
900 JVMWrapper2("JVM_DefineClassWithSource %s", name);
901
902 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
903 JVM_END
904
905 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
906 jobject loader, const jbyte *buf,
907 jsize len, jobject pd,
908 const char *source, jboolean verify))
909 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
910
911 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
912 JVM_END
913
914 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
915 JVMWrapper("JVM_FindLoadedClass");
916 ResourceMark rm(THREAD);
917
918 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
919 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
920
921 const char* str = java_lang_String::as_utf8_string(string());
922 // Sanity check, don't expect null
923 if (str == NULL) return NULL;
924
925 const int str_len = (int)strlen(str);
926 if (str_len > Symbol::max_length()) {
927 // It's impossible to create this class; the name cannot fit
928 // into the constant pool.
929 return NULL;
930 }
931 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
932
933 // Security Note:
934 // The Java level wrapper will perform the necessary security check allowing
935 // us to pass the NULL as the initiating class loader.
936 Handle h_loader(THREAD, JNIHandles::resolve(loader));
937 if (UsePerfData) {
938 is_lock_held_by_thread(h_loader,
939 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
940 THREAD);
941 }
942
943 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
944 h_loader,
945 Handle(),
946 CHECK_NULL);
947
948 return (k == NULL) ? NULL :
949 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
950 JVM_END
951
952
953 // Reflection support //////////////////////////////////////////////////////////////////////////////
954
955 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
956 assert (cls != NULL, "illegal class");
957 JVMWrapper("JVM_GetClassName");
958 JvmtiVMObjectAllocEventCollector oam;
959 ResourceMark rm(THREAD);
960 const char* name;
961 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
962 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
963 } else {
964 // Consider caching interned string in Klass
965 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
966 assert(k->is_klass(), "just checking");
967 name = Klass::cast(k)->external_name();
968 }
969 oop result = StringTable::intern((char*) name, CHECK_NULL);
970 return (jstring) JNIHandles::make_local(env, result);
971 JVM_END
972
973
974 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
975 JVMWrapper("JVM_GetClassInterfaces");
976 JvmtiVMObjectAllocEventCollector oam;
977 oop mirror = JNIHandles::resolve_non_null(cls);
978
979 // Special handling for primitive objects
980 if (java_lang_Class::is_primitive(mirror)) {
981 // Primitive objects does not have any interfaces
982 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
983 return (jobjectArray) JNIHandles::make_local(env, r);
984 }
985
986 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
987 // Figure size of result array
988 int size;
989 if (klass->oop_is_instance()) {
990 size = instanceKlass::cast(klass())->local_interfaces()->length();
991 } else {
992 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
993 size = 2;
994 }
995
996 // Allocate result array
997 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
998 objArrayHandle result (THREAD, r);
999 // Fill in result
1000 if (klass->oop_is_instance()) {
1001 // Regular instance klass, fill in all local interfaces
1002 for (int index = 0; index < size; index++) {
1003 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
1004 result->obj_at_put(index, Klass::cast(k)->java_mirror());
1005 }
1006 } else {
1007 // All arrays implement java.lang.Cloneable and java.io.Serializable
1008 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
1009 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
1010 }
1011 return (jobjectArray) JNIHandles::make_local(env, result());
1012 JVM_END
1013
1014
1015 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1016 JVMWrapper("JVM_GetClassLoader");
1017 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1018 return NULL;
1019 }
1020 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1021 oop loader = Klass::cast(k)->class_loader();
1022 return JNIHandles::make_local(env, loader);
1023 JVM_END
1024
1025
1026 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1027 JVMWrapper("JVM_IsInterface");
1028 oop mirror = JNIHandles::resolve_non_null(cls);
1029 if (java_lang_Class::is_primitive(mirror)) {
1030 return JNI_FALSE;
1031 }
1032 klassOop k = java_lang_Class::as_klassOop(mirror);
1033 jboolean result = Klass::cast(k)->is_interface();
1034 assert(!result || Klass::cast(k)->oop_is_instance(),
1035 "all interfaces are instance types");
1036 // The compiler intrinsic for isInterface tests the
1037 // Klass::_access_flags bits in the same way.
1038 return result;
1039 JVM_END
1040
1041
1042 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1043 JVMWrapper("JVM_GetClassSigners");
1044 JvmtiVMObjectAllocEventCollector oam;
1045 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1046 // There are no signers for primitive types
1047 return NULL;
1048 }
1049
1050 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1051 objArrayOop signers = NULL;
1052 if (Klass::cast(k)->oop_is_instance()) {
1053 signers = instanceKlass::cast(k)->signers();
1054 }
1055
1056 // If there are no signers set in the class, or if the class
1057 // is an array, return NULL.
1058 if (signers == NULL) return NULL;
1059
1060 // copy of the signers array
1061 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1062 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1063 for (int index = 0; index < signers->length(); index++) {
1064 signers_copy->obj_at_put(index, signers->obj_at(index));
1065 }
1066
1067 // return the copy
1068 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1069 JVM_END
1070
1071
1072 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1073 JVMWrapper("JVM_SetClassSigners");
1074 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1075 // This call is ignored for primitive types and arrays.
1076 // Signers are only set once, ClassLoader.java, and thus shouldn't
1077 // be called with an array. Only the bootstrap loader creates arrays.
1078 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1079 if (Klass::cast(k)->oop_is_instance()) {
1080 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1081 }
1082 }
1083 JVM_END
1084
1085
1086 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1087 JVMWrapper("JVM_GetProtectionDomain");
1088 if (JNIHandles::resolve(cls) == NULL) {
1089 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1090 }
1091
1092 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1093 // Primitive types does not have a protection domain.
1094 return NULL;
1095 }
1096
1097 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1098 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1099 JVM_END
1100
1101
1102 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1103 // still defined in core libraries as of 1.5.
1104 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1105 JVMWrapper("JVM_SetProtectionDomain");
1106 if (JNIHandles::resolve(cls) == NULL) {
1107 THROW(vmSymbols::java_lang_NullPointerException());
1108 }
1109 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1110 // Call is ignored for primitive types
1111 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1112
1113 // cls won't be an array, as this called only from ClassLoader.defineClass
1114 if (Klass::cast(k)->oop_is_instance()) {
1115 oop pd = JNIHandles::resolve(protection_domain);
1116 assert(pd == NULL || pd->is_oop(), "just checking");
1117 instanceKlass::cast(k)->set_protection_domain(pd);
1118 }
1119 }
1120 JVM_END
1121
1122 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1123 // If there is a security manager and protection domain, check the access
1124 // in the protection domain, otherwise it is authorized.
1125 if (java_lang_System::has_security_manager()) {
1126
1127 // For bootstrapping, if pd implies method isn't in the JDK, allow
1128 // this context to revert to older behavior.
1129 // In this case the isAuthorized field in AccessControlContext is also not
1130 // present.
1131 if (Universe::protection_domain_implies_method() == NULL) {
1132 return true;
1133 }
1134
1135 // Whitelist certain access control contexts
1136 if (java_security_AccessControlContext::is_authorized(context)) {
1137 return true;
1138 }
1139
1140 oop prot = klass->protection_domain();
1141 if (prot != NULL) {
1142 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1143 // in the new wrapper.
1144 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1145 Handle h_prot(THREAD, prot);
1146 JavaValue result(T_BOOLEAN);
1147 JavaCallArguments args(h_prot);
1148 JavaCalls::call(&result, m, &args, CHECK_false);
1149 return (result.get_jboolean() != 0);
1150 }
1151 }
1152 return true;
1153 }
1154
1155 // Create an AccessControlContext with a protection domain with null codesource
1156 // and null permissions - which gives no permissions.
1157 oop create_dummy_access_control_context(TRAPS) {
1158 instanceKlassHandle pd_klass (THREAD, SystemDictionary::ProtectionDomain_klass());
1159 // new ProtectionDomain(null,null);
1160 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1161 Handle null_pd(THREAD, null_protection_domain);
1162
1163 // new ProtectionDomain[] {pd};
1164 objArrayOop context = oopFactory::new_objArray(pd_klass(), 1, CHECK_NULL);
1165 context->obj_at_put(0, null_pd());
1166
1167 // new AccessControlContext(new ProtectionDomain[] {pd})
1168 objArrayHandle h_context(THREAD, context);
1169 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1170 return result;
1171 }
1172
1173
1174 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1175 JVMWrapper("JVM_DoPrivileged");
1176
1177 if (action == NULL) {
1178 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1179 }
1180
1181
1182 // Compute the frame initiating the do privileged operation and setup the privileged stack
1183 vframeStream vfst(thread);
1184 vfst.security_get_caller_frame(1);
1185
1186 if (vfst.at_end()) {
1187 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1188 }
1189
1190 methodOop method = vfst.method();
1191 instanceKlassHandle klass (THREAD, method->method_holder());
1192
1193 // Check that action object understands "Object run()"
1194 Handle h_context;
1195 if (context != NULL) {
1196 h_context = Handle(THREAD, JNIHandles::resolve(context));
1197 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1198 if (!authorized) {
1199 // Create an unprivileged access control object and call it's run function
1200 // instead.
1201 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1202 h_context = Handle(THREAD, noprivs);
1203 }
1204 }
1205
1206 // Check that action object understands "Object run()"
1207 Handle object (THREAD, JNIHandles::resolve(action));
1208
1209 // get run() method
1210 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1211 vmSymbols::run_method_name(),
1212 vmSymbols::void_object_signature());
1213 methodHandle m (THREAD, m_oop);
1214 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1215 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1216 }
1217
1218 // Stack allocated list of privileged stack elements
1219 PrivilegedElement pi;
1220
1221 if (!vfst.at_end()) {
1222 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1223 thread->set_privileged_stack_top(&pi);
1224 }
1225
1226
1227 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1228 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1229 Handle pending_exception;
1230 JavaValue result(T_OBJECT);
1231 JavaCallArguments args(object);
1232 JavaCalls::call(&result, m, &args, THREAD);
1233
1234 // done with action, remove ourselves from the list
1235 if (!vfst.at_end()) {
1236 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1237 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1238 }
1239
1240 if (HAS_PENDING_EXCEPTION) {
1241 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1242 CLEAR_PENDING_EXCEPTION;
1243
1244 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1245 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1246 // Throw a java.security.PrivilegedActionException(Exception e) exception
1247 JavaCallArguments args(pending_exception);
1248 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1249 vmSymbols::exception_void_signature(),
1250 &args);
1251 }
1252 }
1253
1254 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1255 return JNIHandles::make_local(env, (oop) result.get_jobject());
1256 JVM_END
1257
1258
1259 // Returns the inherited_access_control_context field of the running thread.
1260 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1261 JVMWrapper("JVM_GetInheritedAccessControlContext");
1262 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1263 return JNIHandles::make_local(env, result);
1264 JVM_END
1265
1266 class RegisterArrayForGC {
1267 private:
1268 JavaThread *_thread;
1269 public:
1270 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1271 _thread = thread;
1272 _thread->register_array_for_gc(array);
1273 }
1274
1275 ~RegisterArrayForGC() {
1276 _thread->register_array_for_gc(NULL);
1277 }
1278 };
1279
1280
1281 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1282 JVMWrapper("JVM_GetStackAccessControlContext");
1283 if (!UsePrivilegedStack) return NULL;
1284
1285 ResourceMark rm(THREAD);
1286 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1287 JvmtiVMObjectAllocEventCollector oam;
1288
1289 // count the protection domains on the execution stack. We collapse
1290 // duplicate consecutive protection domains into a single one, as
1291 // well as stopping when we hit a privileged frame.
1292
1293 // Use vframeStream to iterate through Java frames
1294 vframeStream vfst(thread);
1295
1296 oop previous_protection_domain = NULL;
1297 Handle privileged_context(thread, NULL);
1298 bool is_privileged = false;
1299 oop protection_domain = NULL;
1300
1301 for(; !vfst.at_end(); vfst.next()) {
1302 // get method of frame
1303 methodOop method = vfst.method();
1304 intptr_t* frame_id = vfst.frame_id();
1305
1306 // check the privileged frames to see if we have a match
1307 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1308 // this frame is privileged
1309 is_privileged = true;
1310 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1311 protection_domain = thread->privileged_stack_top()->protection_domain();
1312 } else {
1313 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1314 }
1315
1316 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1317 local_array->push(protection_domain);
1318 previous_protection_domain = protection_domain;
1319 }
1320
1321 if (is_privileged) break;
1322 }
1323
1324
1325 // either all the domains on the stack were system domains, or
1326 // we had a privileged system domain
1327 if (local_array->is_empty()) {
1328 if (is_privileged && privileged_context.is_null()) return NULL;
1329
1330 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1331 return JNIHandles::make_local(env, result);
1332 }
1333
1334 // the resource area must be registered in case of a gc
1335 RegisterArrayForGC ragc(thread, local_array);
1336 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1337 local_array->length(), CHECK_NULL);
1338 objArrayHandle h_context(thread, context);
1339 for (int index = 0; index < local_array->length(); index++) {
1340 h_context->obj_at_put(index, local_array->at(index));
1341 }
1342
1343 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1344
1345 return JNIHandles::make_local(env, result);
1346 JVM_END
1347
1348
1349 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1350 JVMWrapper("JVM_IsArrayClass");
1351 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1352 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1353 JVM_END
1354
1355
1356 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1357 JVMWrapper("JVM_IsPrimitiveClass");
1358 oop mirror = JNIHandles::resolve_non_null(cls);
1359 return (jboolean) java_lang_Class::is_primitive(mirror);
1360 JVM_END
1361
1362
1363 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1364 JVMWrapper("JVM_GetComponentType");
1365 oop mirror = JNIHandles::resolve_non_null(cls);
1366 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1367 return (jclass) JNIHandles::make_local(env, result);
1368 JVM_END
1369
1370
1371 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1372 JVMWrapper("JVM_GetClassModifiers");
1373 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1374 // Primitive type
1375 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1376 }
1377
1378 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1379 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1380 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1381 return k->modifier_flags();
1382 JVM_END
1383
1384
1385 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1386
1387 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1388 JvmtiVMObjectAllocEventCollector oam;
1389 // ofClass is a reference to a java_lang_Class object. The mirror object
1390 // of an instanceKlass
1391
1392 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1393 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1394 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1395 return (jobjectArray)JNIHandles::make_local(env, result);
1396 }
1397
1398 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1399 InnerClassesIterator iter(k);
1400
1401 if (iter.length() == 0) {
1402 // Neither an inner nor outer class
1403 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1404 return (jobjectArray)JNIHandles::make_local(env, result);
1405 }
1406
1407 // find inner class info
1408 constantPoolHandle cp(thread, k->constants());
1409 int length = iter.length();
1410
1411 // Allocate temp. result array
1412 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1413 objArrayHandle result (THREAD, r);
1414 int members = 0;
1415
1416 for (; !iter.done(); iter.next()) {
1417 int ioff = iter.inner_class_info_index();
1418 int ooff = iter.outer_class_info_index();
1419
1420 if (ioff != 0 && ooff != 0) {
1421 // Check to see if the name matches the class we're looking for
1422 // before attempting to find the class.
1423 if (cp->klass_name_at_matches(k, ooff)) {
1424 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1425 if (outer_klass == k()) {
1426 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1427 instanceKlassHandle inner_klass (THREAD, ik);
1428
1429 // Throws an exception if outer klass has not declared k as
1430 // an inner klass
1431 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1432
1433 result->obj_at_put(members, inner_klass->java_mirror());
1434 members++;
1435 }
1436 }
1437 }
1438 }
1439
1440 if (members != length) {
1441 // Return array of right length
1442 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1443 for(int i = 0; i < members; i++) {
1444 res->obj_at_put(i, result->obj_at(i));
1445 }
1446 return (jobjectArray)JNIHandles::make_local(env, res);
1447 }
1448
1449 return (jobjectArray)JNIHandles::make_local(env, result());
1450 JVM_END
1451
1452
1453 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1454 {
1455 // ofClass is a reference to a java_lang_Class object.
1456 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1457 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1458 return NULL;
1459 }
1460
1461 bool inner_is_member = false;
1462 klassOop outer_klass
1463 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1464 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1465 if (outer_klass == NULL) return NULL; // already a top-level class
1466 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1467 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1468 }
1469 JVM_END
1470
1471 // should be in instanceKlass.cpp, but is here for historical reasons
1472 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1473 bool* inner_is_member,
1474 TRAPS) {
1475 Thread* thread = THREAD;
1476 InnerClassesIterator iter(k);
1477 if (iter.length() == 0) {
1478 // No inner class info => no declaring class
1479 return NULL;
1480 }
1481
1482 constantPoolHandle i_cp(thread, k->constants());
1483
1484 bool found = false;
1485 klassOop ok;
1486 instanceKlassHandle outer_klass;
1487 *inner_is_member = false;
1488
1489 // Find inner_klass attribute
1490 for (; !iter.done() && !found; iter.next()) {
1491 int ioff = iter.inner_class_info_index();
1492 int ooff = iter.outer_class_info_index();
1493 int noff = iter.inner_name_index();
1494 if (ioff != 0) {
1495 // Check to see if the name matches the class we're looking for
1496 // before attempting to find the class.
1497 if (i_cp->klass_name_at_matches(k, ioff)) {
1498 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1499 found = (k() == inner_klass);
1500 if (found && ooff != 0) {
1501 ok = i_cp->klass_at(ooff, CHECK_NULL);
1502 outer_klass = instanceKlassHandle(thread, ok);
1503 *inner_is_member = true;
1504 }
1505 }
1506 }
1507 }
1508
1509 if (found && outer_klass.is_null()) {
1510 // It may be anonymous; try for that.
1511 int encl_method_class_idx = k->enclosing_method_class_index();
1512 if (encl_method_class_idx != 0) {
1513 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1514 outer_klass = instanceKlassHandle(thread, ok);
1515 *inner_is_member = false;
1516 }
1517 }
1518
1519 // If no inner class attribute found for this class.
1520 if (outer_klass.is_null()) return NULL;
1521
1522 // Throws an exception if outer klass has not declared k as an inner klass
1523 // We need evidence that each klass knows about the other, or else
1524 // the system could allow a spoof of an inner class to gain access rights.
1525 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1526 return outer_klass();
1527 }
1528
1529 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1530 assert (cls != NULL, "illegal class");
1531 JVMWrapper("JVM_GetClassSignature");
1532 JvmtiVMObjectAllocEventCollector oam;
1533 ResourceMark rm(THREAD);
1534 // Return null for arrays and primatives
1535 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1536 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1537 if (Klass::cast(k)->oop_is_instance()) {
1538 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1539 if (sym == NULL) return NULL;
1540 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1541 return (jstring) JNIHandles::make_local(env, str());
1542 }
1543 }
1544 return NULL;
1545 JVM_END
1546
1547
1548 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1549 assert (cls != NULL, "illegal class");
1550 JVMWrapper("JVM_GetClassAnnotations");
1551 ResourceMark rm(THREAD);
1552 // Return null for arrays and primitives
1553 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1554 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1555 if (Klass::cast(k)->oop_is_instance()) {
1556 return (jbyteArray) JNIHandles::make_local(env,
1557 instanceKlass::cast(k)->class_annotations());
1558 }
1559 }
1560 return NULL;
1561 JVM_END
1562
1563
1564 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1565 assert(field != NULL, "illegal field");
1566 JVMWrapper("JVM_GetFieldAnnotations");
1567
1568 // some of this code was adapted from from jni_FromReflectedField
1569
1570 // field is a handle to a java.lang.reflect.Field object
1571 oop reflected = JNIHandles::resolve_non_null(field);
1572 oop mirror = java_lang_reflect_Field::clazz(reflected);
1573 klassOop k = java_lang_Class::as_klassOop(mirror);
1574 int slot = java_lang_reflect_Field::slot(reflected);
1575 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1576
1577 fieldDescriptor fd;
1578 KlassHandle kh(THREAD, k);
1579 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1580
1581 if (modifiers & JVM_ACC_STATIC) {
1582 // for static fields we only look in the current class
1583 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1584 true, &fd)) {
1585 assert(false, "cannot find static field");
1586 return NULL; // robustness
1587 }
1588 } else {
1589 // for instance fields we start with the current class and work
1590 // our way up through the superclass chain
1591 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1592 &fd)) {
1593 assert(false, "cannot find instance field");
1594 return NULL; // robustness
1595 }
1596 }
1597
1598 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1599 JVM_END
1600
1601
1602 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1603 // some of this code was adapted from from jni_FromReflectedMethod
1604
1605 oop reflected = JNIHandles::resolve_non_null(method);
1606 oop mirror = NULL;
1607 int slot = 0;
1608
1609 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1610 mirror = java_lang_reflect_Constructor::clazz(reflected);
1611 slot = java_lang_reflect_Constructor::slot(reflected);
1612 } else {
1613 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1614 "wrong type");
1615 mirror = java_lang_reflect_Method::clazz(reflected);
1616 slot = java_lang_reflect_Method::slot(reflected);
1617 }
1618 klassOop k = java_lang_Class::as_klassOop(mirror);
1619
1620 KlassHandle kh(THREAD, k);
1621 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1622 if (m == NULL) {
1623 assert(false, "cannot find method");
1624 return NULL; // robustness
1625 }
1626
1627 return m;
1628 }
1629
1630
1631 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1632 JVMWrapper("JVM_GetMethodAnnotations");
1633
1634 // method is a handle to a java.lang.reflect.Method object
1635 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1636 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1637 JVM_END
1638
1639
1640 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1641 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1642
1643 // method is a handle to a java.lang.reflect.Method object
1644 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1645 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1646 JVM_END
1647
1648
1649 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1650 JVMWrapper("JVM_GetMethodParameterAnnotations");
1651
1652 // method is a handle to a java.lang.reflect.Method object
1653 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1654 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1655 JVM_END
1656
1657
1658 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1659
1660 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1661 {
1662 JVMWrapper("JVM_GetClassDeclaredFields");
1663 JvmtiVMObjectAllocEventCollector oam;
1664
1665 // Exclude primitive types and array types
1666 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1667 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1668 // Return empty array
1669 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1670 return (jobjectArray) JNIHandles::make_local(env, res);
1671 }
1672
1673 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1674 constantPoolHandle cp(THREAD, k->constants());
1675
1676 // Ensure class is linked
1677 k->link_class(CHECK_NULL);
1678
1679 // 4496456 We need to filter out java.lang.Throwable.backtrace
1680 bool skip_backtrace = false;
1681
1682 // Allocate result
1683 int num_fields;
1684
1685 if (publicOnly) {
1686 num_fields = 0;
1687 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1688 if (fs.access_flags().is_public()) ++num_fields;
1689 }
1690 } else {
1691 num_fields = k->java_fields_count();
1692
1693 if (k() == SystemDictionary::Throwable_klass()) {
1694 num_fields--;
1695 skip_backtrace = true;
1696 }
1697 }
1698
1699 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1700 objArrayHandle result (THREAD, r);
1701
1702 int out_idx = 0;
1703 fieldDescriptor fd;
1704 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1705 if (skip_backtrace) {
1706 // 4496456 skip java.lang.Throwable.backtrace
1707 int offset = fs.offset();
1708 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1709 }
1710
1711 if (!publicOnly || fs.access_flags().is_public()) {
1712 fd.initialize(k(), fs.index());
1713 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1714 result->obj_at_put(out_idx, field);
1715 ++out_idx;
1716 }
1717 }
1718 assert(out_idx == num_fields, "just checking");
1719 return (jobjectArray) JNIHandles::make_local(env, result());
1720 }
1721 JVM_END
1722
1723 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1724 {
1725 JVMWrapper("JVM_GetClassDeclaredMethods");
1726 JvmtiVMObjectAllocEventCollector oam;
1727
1728 // Exclude primitive types and array types
1729 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1730 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1731 // Return empty array
1732 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1733 return (jobjectArray) JNIHandles::make_local(env, res);
1734 }
1735
1736 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1737
1738 // Ensure class is linked
1739 k->link_class(CHECK_NULL);
1740
1741 objArrayHandle methods (THREAD, k->methods());
1742 int methods_length = methods->length();
1743 int num_methods = 0;
1744
1745 int i;
1746 for (i = 0; i < methods_length; i++) {
1747 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1748 if (!method->is_initializer()) {
1749 if (!publicOnly || method->is_public()) {
1750 ++num_methods;
1751 }
1752 }
1753 }
1754
1755 // Allocate result
1756 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1757 objArrayHandle result (THREAD, r);
1758
1759 int out_idx = 0;
1760 for (i = 0; i < methods_length; i++) {
1761 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1762 if (!method->is_initializer()) {
1763 if (!publicOnly || method->is_public()) {
1764 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1765 result->obj_at_put(out_idx, m);
1766 ++out_idx;
1767 }
1768 }
1769 }
1770 assert(out_idx == num_methods, "just checking");
1771 return (jobjectArray) JNIHandles::make_local(env, result());
1772 }
1773 JVM_END
1774
1775 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1776 {
1777 JVMWrapper("JVM_GetClassDeclaredConstructors");
1778 JvmtiVMObjectAllocEventCollector oam;
1779
1780 // Exclude primitive types and array types
1781 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1782 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1783 // Return empty array
1784 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1785 return (jobjectArray) JNIHandles::make_local(env, res);
1786 }
1787
1788 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1789
1790 // Ensure class is linked
1791 k->link_class(CHECK_NULL);
1792
1793 objArrayHandle methods (THREAD, k->methods());
1794 int methods_length = methods->length();
1795 int num_constructors = 0;
1796
1797 int i;
1798 for (i = 0; i < methods_length; i++) {
1799 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1800 if (method->is_initializer() && !method->is_static()) {
1801 if (!publicOnly || method->is_public()) {
1802 ++num_constructors;
1803 }
1804 }
1805 }
1806
1807 // Allocate result
1808 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1809 objArrayHandle result(THREAD, r);
1810
1811 int out_idx = 0;
1812 for (i = 0; i < methods_length; i++) {
1813 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1814 if (method->is_initializer() && !method->is_static()) {
1815 if (!publicOnly || method->is_public()) {
1816 oop m = Reflection::new_constructor(method, CHECK_NULL);
1817 result->obj_at_put(out_idx, m);
1818 ++out_idx;
1819 }
1820 }
1821 }
1822 assert(out_idx == num_constructors, "just checking");
1823 return (jobjectArray) JNIHandles::make_local(env, result());
1824 }
1825 JVM_END
1826
1827 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1828 {
1829 JVMWrapper("JVM_GetClassAccessFlags");
1830 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1831 // Primitive type
1832 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1833 }
1834
1835 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1836 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1837 }
1838 JVM_END
1839
1840
1841 // Constant pool access //////////////////////////////////////////////////////////
1842
1843 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1844 {
1845 JVMWrapper("JVM_GetClassConstantPool");
1846 JvmtiVMObjectAllocEventCollector oam;
1847
1848 // Return null for primitives and arrays
1849 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1850 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1851 if (Klass::cast(k)->oop_is_instance()) {
1852 instanceKlassHandle k_h(THREAD, k);
1853 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1854 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1855 return JNIHandles::make_local(jcp());
1856 }
1857 }
1858 return NULL;
1859 }
1860 JVM_END
1861
1862
1863 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1864 {
1865 JVMWrapper("JVM_ConstantPoolGetSize");
1866 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1867 return cp->length();
1868 }
1869 JVM_END
1870
1871
1872 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1873 if (!cp->is_within_bounds(index)) {
1874 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1875 }
1876 }
1877
1878
1879 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1880 {
1881 JVMWrapper("JVM_ConstantPoolGetClassAt");
1882 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1883 bounds_check(cp, index, CHECK_NULL);
1884 constantTag tag = cp->tag_at(index);
1885 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1886 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1887 }
1888 klassOop k = cp->klass_at(index, CHECK_NULL);
1889 return (jclass) JNIHandles::make_local(k->java_mirror());
1890 }
1891 JVM_END
1892
1893
1894 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1895 {
1896 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1897 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1898 bounds_check(cp, index, CHECK_NULL);
1899 constantTag tag = cp->tag_at(index);
1900 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1901 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1902 }
1903 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1904 if (k == NULL) return NULL;
1905 return (jclass) JNIHandles::make_local(k->java_mirror());
1906 }
1907 JVM_END
1908
1909 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1910 constantTag tag = cp->tag_at(index);
1911 if (!tag.is_method() && !tag.is_interface_method()) {
1912 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1913 }
1914 int klass_ref = cp->uncached_klass_ref_index_at(index);
1915 klassOop k_o;
1916 if (force_resolution) {
1917 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1918 } else {
1919 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1920 if (k_o == NULL) return NULL;
1921 }
1922 instanceKlassHandle k(THREAD, k_o);
1923 Symbol* name = cp->uncached_name_ref_at(index);
1924 Symbol* sig = cp->uncached_signature_ref_at(index);
1925 methodHandle m (THREAD, k->find_method(name, sig));
1926 if (m.is_null()) {
1927 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1928 }
1929 oop method;
1930 if (!m->is_initializer() || m->is_static()) {
1931 method = Reflection::new_method(m, true, true, CHECK_NULL);
1932 } else {
1933 method = Reflection::new_constructor(m, CHECK_NULL);
1934 }
1935 return JNIHandles::make_local(method);
1936 }
1937
1938 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1939 {
1940 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1941 JvmtiVMObjectAllocEventCollector oam;
1942 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1943 bounds_check(cp, index, CHECK_NULL);
1944 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1945 return res;
1946 }
1947 JVM_END
1948
1949 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1950 {
1951 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1952 JvmtiVMObjectAllocEventCollector oam;
1953 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1954 bounds_check(cp, index, CHECK_NULL);
1955 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1956 return res;
1957 }
1958 JVM_END
1959
1960 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1961 constantTag tag = cp->tag_at(index);
1962 if (!tag.is_field()) {
1963 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1964 }
1965 int klass_ref = cp->uncached_klass_ref_index_at(index);
1966 klassOop k_o;
1967 if (force_resolution) {
1968 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1969 } else {
1970 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1971 if (k_o == NULL) return NULL;
1972 }
1973 instanceKlassHandle k(THREAD, k_o);
1974 Symbol* name = cp->uncached_name_ref_at(index);
1975 Symbol* sig = cp->uncached_signature_ref_at(index);
1976 fieldDescriptor fd;
1977 klassOop target_klass = k->find_field(name, sig, &fd);
1978 if (target_klass == NULL) {
1979 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1980 }
1981 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1982 return JNIHandles::make_local(field);
1983 }
1984
1985 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1986 {
1987 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1988 JvmtiVMObjectAllocEventCollector oam;
1989 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1990 bounds_check(cp, index, CHECK_NULL);
1991 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1992 return res;
1993 }
1994 JVM_END
1995
1996 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1997 {
1998 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1999 JvmtiVMObjectAllocEventCollector oam;
2000 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2001 bounds_check(cp, index, CHECK_NULL);
2002 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2003 return res;
2004 }
2005 JVM_END
2006
2007 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2008 {
2009 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2010 JvmtiVMObjectAllocEventCollector oam;
2011 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2012 bounds_check(cp, index, CHECK_NULL);
2013 constantTag tag = cp->tag_at(index);
2014 if (!tag.is_field_or_method()) {
2015 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2016 }
2017 int klass_ref = cp->uncached_klass_ref_index_at(index);
2018 Symbol* klass_name = cp->klass_name_at(klass_ref);
2019 Symbol* member_name = cp->uncached_name_ref_at(index);
2020 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2021 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2022 objArrayHandle dest(THREAD, dest_o);
2023 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2024 dest->obj_at_put(0, str());
2025 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2026 dest->obj_at_put(1, str());
2027 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2028 dest->obj_at_put(2, str());
2029 return (jobjectArray) JNIHandles::make_local(dest());
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2034 {
2035 JVMWrapper("JVM_ConstantPoolGetIntAt");
2036 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2037 bounds_check(cp, index, CHECK_0);
2038 constantTag tag = cp->tag_at(index);
2039 if (!tag.is_int()) {
2040 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2041 }
2042 return cp->int_at(index);
2043 }
2044 JVM_END
2045
2046 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2047 {
2048 JVMWrapper("JVM_ConstantPoolGetLongAt");
2049 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2050 bounds_check(cp, index, CHECK_(0L));
2051 constantTag tag = cp->tag_at(index);
2052 if (!tag.is_long()) {
2053 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2054 }
2055 return cp->long_at(index);
2056 }
2057 JVM_END
2058
2059 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2060 {
2061 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2062 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2063 bounds_check(cp, index, CHECK_(0.0f));
2064 constantTag tag = cp->tag_at(index);
2065 if (!tag.is_float()) {
2066 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2067 }
2068 return cp->float_at(index);
2069 }
2070 JVM_END
2071
2072 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2073 {
2074 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2075 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2076 bounds_check(cp, index, CHECK_(0.0));
2077 constantTag tag = cp->tag_at(index);
2078 if (!tag.is_double()) {
2079 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2080 }
2081 return cp->double_at(index);
2082 }
2083 JVM_END
2084
2085 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2086 {
2087 JVMWrapper("JVM_ConstantPoolGetStringAt");
2088 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2089 bounds_check(cp, index, CHECK_NULL);
2090 constantTag tag = cp->tag_at(index);
2091 if (!tag.is_string() && !tag.is_unresolved_string()) {
2092 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2093 }
2094 oop str = cp->string_at(index, CHECK_NULL);
2095 return (jstring) JNIHandles::make_local(str);
2096 }
2097 JVM_END
2098
2099 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2100 {
2101 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2102 JvmtiVMObjectAllocEventCollector oam;
2103 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2104 bounds_check(cp, index, CHECK_NULL);
2105 constantTag tag = cp->tag_at(index);
2106 if (!tag.is_symbol()) {
2107 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2108 }
2109 Symbol* sym = cp->symbol_at(index);
2110 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2111 return (jstring) JNIHandles::make_local(str());
2112 }
2113 JVM_END
2114
2115
2116 // Assertion support. //////////////////////////////////////////////////////////
2117
2118 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2119 JVMWrapper("JVM_DesiredAssertionStatus");
2120 assert(cls != NULL, "bad class");
2121
2122 oop r = JNIHandles::resolve(cls);
2123 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2124 if (java_lang_Class::is_primitive(r)) return false;
2125
2126 klassOop k = java_lang_Class::as_klassOop(r);
2127 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2128 if (! Klass::cast(k)->oop_is_instance()) return false;
2129
2130 ResourceMark rm(THREAD);
2131 const char* name = Klass::cast(k)->name()->as_C_string();
2132 bool system_class = Klass::cast(k)->class_loader() == NULL;
2133 return JavaAssertions::enabled(name, system_class);
2134
2135 JVM_END
2136
2137
2138 // Return a new AssertionStatusDirectives object with the fields filled in with
2139 // command-line assertion arguments (i.e., -ea, -da).
2140 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2141 JVMWrapper("JVM_AssertionStatusDirectives");
2142 JvmtiVMObjectAllocEventCollector oam;
2143 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2144 return JNIHandles::make_local(env, asd);
2145 JVM_END
2146
2147 // Verification ////////////////////////////////////////////////////////////////////////////////
2148
2149 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2150
2151 // RedefineClasses support: bug 6214132 caused verification to fail.
2152 // All functions from this section should call the jvmtiThreadSate function:
2153 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2154 // The function returns a klassOop of the _scratch_class if the verifier
2155 // was invoked in the middle of the class redefinition.
2156 // Otherwise it returns its argument value which is the _the_class klassOop.
2157 // Please, refer to the description in the jvmtiThreadSate.hpp.
2158
2159 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2160 JVMWrapper("JVM_GetClassNameUTF");
2161 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2162 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2163 return Klass::cast(k)->name()->as_utf8();
2164 JVM_END
2165
2166
2167 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2168 JVMWrapper("JVM_GetClassCPTypes");
2169 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2170 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2171 // types will have length zero if this is not an instanceKlass
2172 // (length is determined by call to JVM_GetClassCPEntriesCount)
2173 if (Klass::cast(k)->oop_is_instance()) {
2174 constantPoolOop cp = instanceKlass::cast(k)->constants();
2175 for (int index = cp->length() - 1; index >= 0; index--) {
2176 constantTag tag = cp->tag_at(index);
2177 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2178 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2179 }
2180 }
2181 JVM_END
2182
2183
2184 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2185 JVMWrapper("JVM_GetClassCPEntriesCount");
2186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2187 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2188 if (!Klass::cast(k)->oop_is_instance())
2189 return 0;
2190 return instanceKlass::cast(k)->constants()->length();
2191 JVM_END
2192
2193
2194 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2195 JVMWrapper("JVM_GetClassFieldsCount");
2196 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2197 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2198 if (!Klass::cast(k)->oop_is_instance())
2199 return 0;
2200 return instanceKlass::cast(k)->java_fields_count();
2201 JVM_END
2202
2203
2204 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2205 JVMWrapper("JVM_GetClassMethodsCount");
2206 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2207 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2208 if (!Klass::cast(k)->oop_is_instance())
2209 return 0;
2210 return instanceKlass::cast(k)->methods()->length();
2211 JVM_END
2212
2213
2214 // The following methods, used for the verifier, are never called with
2215 // array klasses, so a direct cast to instanceKlass is safe.
2216 // Typically, these methods are called in a loop with bounds determined
2217 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2218 // zero for arrays.
2219 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2220 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2221 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2222 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2223 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2224 int length = methodOop(method)->checked_exceptions_length();
2225 if (length > 0) {
2226 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2227 for (int i = 0; i < length; i++) {
2228 exceptions[i] = table[i].class_cp_index;
2229 }
2230 }
2231 JVM_END
2232
2233
2234 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2235 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2236 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2237 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2238 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2239 return methodOop(method)->checked_exceptions_length();
2240 JVM_END
2241
2242
2243 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2244 JVMWrapper("JVM_GetMethodIxByteCode");
2245 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2246 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2247 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2248 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2249 JVM_END
2250
2251
2252 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2253 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2254 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2255 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2256 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2257 return methodOop(method)->code_size();
2258 JVM_END
2259
2260
2261 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2262 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2263 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2264 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2265 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2266 ExceptionTable extable((methodOop(method)));
2267 entry->start_pc = extable.start_pc(entry_index);
2268 entry->end_pc = extable.end_pc(entry_index);
2269 entry->handler_pc = extable.handler_pc(entry_index);
2270 entry->catchType = extable.catch_type_index(entry_index);
2271 JVM_END
2272
2273
2274 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2275 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2276 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2278 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2279 return methodOop(method)->exception_table_length();
2280 JVM_END
2281
2282
2283 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2284 JVMWrapper("JVM_GetMethodIxModifiers");
2285 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2288 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2289 JVM_END
2290
2291
2292 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2293 JVMWrapper("JVM_GetFieldIxModifiers");
2294 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2297 JVM_END
2298
2299
2300 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2301 JVMWrapper("JVM_GetMethodIxLocalsCount");
2302 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2303 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2304 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2305 return methodOop(method)->max_locals();
2306 JVM_END
2307
2308
2309 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2310 JVMWrapper("JVM_GetMethodIxArgsSize");
2311 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2314 return methodOop(method)->size_of_parameters();
2315 JVM_END
2316
2317
2318 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2319 JVMWrapper("JVM_GetMethodIxMaxStack");
2320 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2323 return methodOop(method)->verifier_max_stack();
2324 JVM_END
2325
2326
2327 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2328 JVMWrapper("JVM_IsConstructorIx");
2329 ResourceMark rm(THREAD);
2330 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2331 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2333 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2334 JVM_END
2335
2336
2337 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2338 JVMWrapper("JVM_GetMethodIxIxUTF");
2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2342 return methodOop(method)->name()->as_utf8();
2343 JVM_END
2344
2345
2346 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2347 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2348 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2349 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2350 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2351 return methodOop(method)->signature()->as_utf8();
2352 JVM_END
2353
2354 /**
2355 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2356 * read entries in the constant pool. Since the old verifier always
2357 * works on a copy of the code, it will not see any rewriting that
2358 * may possibly occur in the middle of verification. So it is important
2359 * that nothing it calls tries to use the cpCache instead of the raw
2360 * constant pool, so we must use cp->uncached_x methods when appropriate.
2361 */
2362 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2363 JVMWrapper("JVM_GetCPFieldNameUTF");
2364 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2365 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2366 constantPoolOop cp = instanceKlass::cast(k)->constants();
2367 switch (cp->tag_at(cp_index).value()) {
2368 case JVM_CONSTANT_Fieldref:
2369 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2370 default:
2371 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2372 }
2373 ShouldNotReachHere();
2374 return NULL;
2375 JVM_END
2376
2377
2378 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2379 JVMWrapper("JVM_GetCPMethodNameUTF");
2380 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 constantPoolOop cp = instanceKlass::cast(k)->constants();
2383 switch (cp->tag_at(cp_index).value()) {
2384 case JVM_CONSTANT_InterfaceMethodref:
2385 case JVM_CONSTANT_Methodref:
2386 case JVM_CONSTANT_NameAndType: // for invokedynamic
2387 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2388 default:
2389 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2390 }
2391 ShouldNotReachHere();
2392 return NULL;
2393 JVM_END
2394
2395
2396 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2397 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2398 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2399 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400 constantPoolOop cp = instanceKlass::cast(k)->constants();
2401 switch (cp->tag_at(cp_index).value()) {
2402 case JVM_CONSTANT_InterfaceMethodref:
2403 case JVM_CONSTANT_Methodref:
2404 case JVM_CONSTANT_NameAndType: // for invokedynamic
2405 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2406 default:
2407 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2408 }
2409 ShouldNotReachHere();
2410 return NULL;
2411 JVM_END
2412
2413
2414 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2415 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2416 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2417 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418 constantPoolOop cp = instanceKlass::cast(k)->constants();
2419 switch (cp->tag_at(cp_index).value()) {
2420 case JVM_CONSTANT_Fieldref:
2421 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2422 default:
2423 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2424 }
2425 ShouldNotReachHere();
2426 return NULL;
2427 JVM_END
2428
2429
2430 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2431 JVMWrapper("JVM_GetCPClassNameUTF");
2432 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 constantPoolOop cp = instanceKlass::cast(k)->constants();
2435 Symbol* classname = cp->klass_name_at(cp_index);
2436 return classname->as_utf8();
2437 JVM_END
2438
2439
2440 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2441 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2442 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 constantPoolOop cp = instanceKlass::cast(k)->constants();
2445 switch (cp->tag_at(cp_index).value()) {
2446 case JVM_CONSTANT_Fieldref: {
2447 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2448 Symbol* classname = cp->klass_name_at(class_index);
2449 return classname->as_utf8();
2450 }
2451 default:
2452 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2453 }
2454 ShouldNotReachHere();
2455 return NULL;
2456 JVM_END
2457
2458
2459 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2460 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2461 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2462 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2463 constantPoolOop cp = instanceKlass::cast(k)->constants();
2464 switch (cp->tag_at(cp_index).value()) {
2465 case JVM_CONSTANT_Methodref:
2466 case JVM_CONSTANT_InterfaceMethodref: {
2467 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2468 Symbol* classname = cp->klass_name_at(class_index);
2469 return classname->as_utf8();
2470 }
2471 default:
2472 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2473 }
2474 ShouldNotReachHere();
2475 return NULL;
2476 JVM_END
2477
2478
2479 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2480 JVMWrapper("JVM_GetCPFieldModifiers");
2481 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2482 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2483 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2484 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2485 constantPoolOop cp = instanceKlass::cast(k)->constants();
2486 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2487 switch (cp->tag_at(cp_index).value()) {
2488 case JVM_CONSTANT_Fieldref: {
2489 Symbol* name = cp->uncached_name_ref_at(cp_index);
2490 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2491 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2492 if (fs.name() == name && fs.signature() == signature) {
2493 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2494 }
2495 }
2496 return -1;
2497 }
2498 default:
2499 fatal("JVM_GetCPFieldModifiers: illegal constant");
2500 }
2501 ShouldNotReachHere();
2502 return 0;
2503 JVM_END
2504
2505
2506 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2507 JVMWrapper("JVM_GetCPMethodModifiers");
2508 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2509 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2510 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2511 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2512 constantPoolOop cp = instanceKlass::cast(k)->constants();
2513 switch (cp->tag_at(cp_index).value()) {
2514 case JVM_CONSTANT_Methodref:
2515 case JVM_CONSTANT_InterfaceMethodref: {
2516 Symbol* name = cp->uncached_name_ref_at(cp_index);
2517 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2518 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2519 int methods_count = methods->length();
2520 for (int i = 0; i < methods_count; i++) {
2521 methodOop method = methodOop(methods->obj_at(i));
2522 if (method->name() == name && method->signature() == signature) {
2523 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2524 }
2525 }
2526 return -1;
2527 }
2528 default:
2529 fatal("JVM_GetCPMethodModifiers: illegal constant");
2530 }
2531 ShouldNotReachHere();
2532 return 0;
2533 JVM_END
2534
2535
2536 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2537
2538 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2539 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2540 JVM_END
2541
2542
2543 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2544 JVMWrapper("JVM_IsSameClassPackage");
2545 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2546 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2547 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2548 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2549 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2550 JVM_END
2551
2552
2553 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2554
2555 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2556 JVMWrapper2("JVM_Open (%s)", fname);
2557
2558 //%note jvm_r6
2559 int result = os::open(fname, flags, mode);
2560 if (result >= 0) {
2561 return result;
2562 } else {
2563 switch(errno) {
2564 case EEXIST:
2565 return JVM_EEXIST;
2566 default:
2567 return -1;
2568 }
2569 }
2570 JVM_END
2571
2572
2573 JVM_LEAF(jint, JVM_Close(jint fd))
2574 JVMWrapper2("JVM_Close (0x%x)", fd);
2575 //%note jvm_r6
2576 return os::close(fd);
2577 JVM_END
2578
2579
2580 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2581 JVMWrapper2("JVM_Read (0x%x)", fd);
2582
2583 //%note jvm_r6
2584 return (jint)os::restartable_read(fd, buf, nbytes);
2585 JVM_END
2586
2587
2588 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2589 JVMWrapper2("JVM_Write (0x%x)", fd);
2590
2591 //%note jvm_r6
2592 return (jint)os::write(fd, buf, nbytes);
2593 JVM_END
2594
2595
2596 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2597 JVMWrapper2("JVM_Available (0x%x)", fd);
2598 //%note jvm_r6
2599 return os::available(fd, pbytes);
2600 JVM_END
2601
2602
2603 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2604 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2605 //%note jvm_r6
2606 return os::lseek(fd, offset, whence);
2607 JVM_END
2608
2609
2610 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2611 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2612 return os::ftruncate(fd, length);
2613 JVM_END
2614
2615
2616 JVM_LEAF(jint, JVM_Sync(jint fd))
2617 JVMWrapper2("JVM_Sync (0x%x)", fd);
2618 //%note jvm_r6
2619 return os::fsync(fd);
2620 JVM_END
2621
2622
2623 // Printing support //////////////////////////////////////////////////
2624 extern "C" {
2625
2626 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2627 // see bug 4399518, 4417214
2628 if ((intptr_t)count <= 0) return -1;
2629 return vsnprintf(str, count, fmt, args);
2630 }
2631
2632
2633 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2634 va_list args;
2635 int len;
2636 va_start(args, fmt);
2637 len = jio_vsnprintf(str, count, fmt, args);
2638 va_end(args);
2639 return len;
2640 }
2641
2642
2643 int jio_fprintf(FILE* f, const char *fmt, ...) {
2644 int len;
2645 va_list args;
2646 va_start(args, fmt);
2647 len = jio_vfprintf(f, fmt, args);
2648 va_end(args);
2649 return len;
2650 }
2651
2652
2653 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2654 if (Arguments::vfprintf_hook() != NULL) {
2655 return Arguments::vfprintf_hook()(f, fmt, args);
2656 } else {
2657 return vfprintf(f, fmt, args);
2658 }
2659 }
2660
2661
2662 JNIEXPORT int jio_printf(const char *fmt, ...) {
2663 int len;
2664 va_list args;
2665 va_start(args, fmt);
2666 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2667 va_end(args);
2668 return len;
2669 }
2670
2671
2672 // HotSpot specific jio method
2673 void jio_print(const char* s) {
2674 // Try to make this function as atomic as possible.
2675 if (Arguments::vfprintf_hook() != NULL) {
2676 jio_fprintf(defaultStream::output_stream(), "%s", s);
2677 } else {
2678 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2679 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2680 }
2681 }
2682
2683 } // Extern C
2684
2685 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2686
2687 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2688 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2689 // OSThread objects. The exception to this rule is when the target object is the thread
2690 // doing the operation, in which case we know that the thread won't exit until the
2691 // operation is done (all exits being voluntary). There are a few cases where it is
2692 // rather silly to do operations on yourself, like resuming yourself or asking whether
2693 // you are alive. While these can still happen, they are not subject to deadlocks if
2694 // the lock is held while the operation occurs (this is not the case for suspend, for
2695 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2696 // implementation is local to this file, we always lock Threads_lock for that one.
2697
2698 static void thread_entry(JavaThread* thread, TRAPS) {
2699 HandleMark hm(THREAD);
2700 Handle obj(THREAD, thread->threadObj());
2701 JavaValue result(T_VOID);
2702 JavaCalls::call_virtual(&result,
2703 obj,
2704 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2705 vmSymbols::run_method_name(),
2706 vmSymbols::void_method_signature(),
2707 THREAD);
2708 }
2709
2710
2711 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2712 JVMWrapper("JVM_StartThread");
2713 JavaThread *native_thread = NULL;
2714
2715 // We cannot hold the Threads_lock when we throw an exception,
2716 // due to rank ordering issues. Example: we might need to grab the
2717 // Heap_lock while we construct the exception.
2718 bool throw_illegal_thread_state = false;
2719
2720 // We must release the Threads_lock before we can post a jvmti event
2721 // in Thread::start.
2722 {
2723 // Ensure that the C++ Thread and OSThread structures aren't freed before
2724 // we operate.
2725 MutexLocker mu(Threads_lock);
2726
2727 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2728 // re-starting an already started thread, so we should usually find
2729 // that the JavaThread is null. However for a JNI attached thread
2730 // there is a small window between the Thread object being created
2731 // (with its JavaThread set) and the update to its threadStatus, so we
2732 // have to check for this
2733 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2734 throw_illegal_thread_state = true;
2735 } else {
2736 // We could also check the stillborn flag to see if this thread was already stopped, but
2737 // for historical reasons we let the thread detect that itself when it starts running
2738
2739 jlong size =
2740 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2741 // Allocate the C++ Thread structure and create the native thread. The
2742 // stack size retrieved from java is signed, but the constructor takes
2743 // size_t (an unsigned type), so avoid passing negative values which would
2744 // result in really large stacks.
2745 size_t sz = size > 0 ? (size_t) size : 0;
2746 native_thread = new JavaThread(&thread_entry, sz);
2747
2748 // At this point it may be possible that no osthread was created for the
2749 // JavaThread due to lack of memory. Check for this situation and throw
2750 // an exception if necessary. Eventually we may want to change this so
2751 // that we only grab the lock if the thread was created successfully -
2752 // then we can also do this check and throw the exception in the
2753 // JavaThread constructor.
2754 if (native_thread->osthread() != NULL) {
2755 // Note: the current thread is not being used within "prepare".
2756 native_thread->prepare(jthread);
2757 }
2758 }
2759 }
2760
2761 if (throw_illegal_thread_state) {
2762 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2763 }
2764
2765 assert(native_thread != NULL, "Starting null thread?");
2766
2767 if (native_thread->osthread() == NULL) {
2768 // No one should hold a reference to the 'native_thread'.
2769 delete native_thread;
2770 if (JvmtiExport::should_post_resource_exhausted()) {
2771 JvmtiExport::post_resource_exhausted(
2772 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2773 "unable to create new native thread");
2774 }
2775 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2776 "unable to create new native thread");
2777 }
2778
2779 Thread::start(native_thread);
2780
2781 JVM_END
2782
2783 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2784 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2785 // but is thought to be reliable and simple. In the case, where the receiver is the
2786 // same thread as the sender, no safepoint is needed.
2787 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2788 JVMWrapper("JVM_StopThread");
2789
2790 oop java_throwable = JNIHandles::resolve(throwable);
2791 if (java_throwable == NULL) {
2792 THROW(vmSymbols::java_lang_NullPointerException());
2793 }
2794 oop java_thread = JNIHandles::resolve_non_null(jthread);
2795 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2796 Events::log_exception(JavaThread::current(),
2797 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2798 receiver, (address)java_thread, throwable);
2799 // First check if thread is alive
2800 if (receiver != NULL) {
2801 // Check if exception is getting thrown at self (use oop equality, since the
2802 // target object might exit)
2803 if (java_thread == thread->threadObj()) {
2804 THROW_OOP(java_throwable);
2805 } else {
2806 // Enques a VM_Operation to stop all threads and then deliver the exception...
2807 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2808 }
2809 }
2810 else {
2811 // Either:
2812 // - target thread has not been started before being stopped, or
2813 // - target thread already terminated
2814 // We could read the threadStatus to determine which case it is
2815 // but that is overkill as it doesn't matter. We must set the
2816 // stillborn flag for the first case, and if the thread has already
2817 // exited setting this flag has no affect
2818 java_lang_Thread::set_stillborn(java_thread);
2819 }
2820 JVM_END
2821
2822
2823 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2824 JVMWrapper("JVM_IsThreadAlive");
2825
2826 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2827 return java_lang_Thread::is_alive(thread_oop);
2828 JVM_END
2829
2830
2831 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2832 JVMWrapper("JVM_SuspendThread");
2833 oop java_thread = JNIHandles::resolve_non_null(jthread);
2834 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2835
2836 if (receiver != NULL) {
2837 // thread has run and has not exited (still on threads list)
2838
2839 {
2840 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2841 if (receiver->is_external_suspend()) {
2842 // Don't allow nested external suspend requests. We can't return
2843 // an error from this interface so just ignore the problem.
2844 return;
2845 }
2846 if (receiver->is_exiting()) { // thread is in the process of exiting
2847 return;
2848 }
2849 receiver->set_external_suspend();
2850 }
2851
2852 // java_suspend() will catch threads in the process of exiting
2853 // and will ignore them.
2854 receiver->java_suspend();
2855
2856 // It would be nice to have the following assertion in all the
2857 // time, but it is possible for a racing resume request to have
2858 // resumed this thread right after we suspended it. Temporarily
2859 // enable this assertion if you are chasing a different kind of
2860 // bug.
2861 //
2862 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2863 // receiver->is_being_ext_suspended(), "thread is not suspended");
2864 }
2865 JVM_END
2866
2867
2868 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2869 JVMWrapper("JVM_ResumeThread");
2870 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2871 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2872 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2873 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2874 // looks at it.
2875 MutexLocker ml(Threads_lock);
2876 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2877 if (thr != NULL) {
2878 // the thread has run and is not in the process of exiting
2879 thr->java_resume();
2880 }
2881 JVM_END
2882
2883
2884 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2885 JVMWrapper("JVM_SetThreadPriority");
2886 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2887 MutexLocker ml(Threads_lock);
2888 oop java_thread = JNIHandles::resolve_non_null(jthread);
2889 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2890 JavaThread* thr = java_lang_Thread::thread(java_thread);
2891 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2892 Thread::set_priority(thr, (ThreadPriority)prio);
2893 }
2894 JVM_END
2895
2896
2897 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2898 JVMWrapper("JVM_Yield");
2899 if (os::dont_yield()) return;
2900 #ifndef USDT2
2901 HS_DTRACE_PROBE0(hotspot, thread__yield);
2902 #else /* USDT2 */
2903 HOTSPOT_THREAD_YIELD();
2904 #endif /* USDT2 */
2905 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2906 // Critical for similar threading behaviour
2907 if (ConvertYieldToSleep) {
2908 os::sleep(thread, MinSleepInterval, false);
2909 } else {
2910 os::yield();
2911 }
2912 JVM_END
2913
2914
2915 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2916 JVMWrapper("JVM_Sleep");
2917
2918 if (millis < 0) {
2919 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2920 }
2921
2922 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2923 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2924 }
2925
2926 // Save current thread state and restore it at the end of this block.
2927 // And set new thread state to SLEEPING.
2928 JavaThreadSleepState jtss(thread);
2929
2930 #ifndef USDT2
2931 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2932 #else /* USDT2 */
2933 HOTSPOT_THREAD_SLEEP_BEGIN(
2934 millis);
2935 #endif /* USDT2 */
2936
2937 EventThreadSleep event;
2938
2939 if (millis == 0) {
2940 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2941 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2942 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2943 // for SOLARIS
2944 if (ConvertSleepToYield) {
2945 os::yield();
2946 } else {
2947 ThreadState old_state = thread->osthread()->get_state();
2948 thread->osthread()->set_state(SLEEPING);
2949 os::sleep(thread, MinSleepInterval, false);
2950 thread->osthread()->set_state(old_state);
2951 }
2952 } else {
2953 ThreadState old_state = thread->osthread()->get_state();
2954 thread->osthread()->set_state(SLEEPING);
2955 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2956 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2957 // us while we were sleeping. We do not overwrite those.
2958 if (!HAS_PENDING_EXCEPTION) {
2959 if (event.should_commit()) {
2960 event.set_time(millis);
2961 event.commit();
2962 }
2963 #ifndef USDT2
2964 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2965 #else /* USDT2 */
2966 HOTSPOT_THREAD_SLEEP_END(
2967 1);
2968 #endif /* USDT2 */
2969 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2970 // to properly restore the thread state. That's likely wrong.
2971 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2972 }
2973 }
2974 thread->osthread()->set_state(old_state);
2975 }
2976 if (event.should_commit()) {
2977 event.set_time(millis);
2978 event.commit();
2979 }
2980 #ifndef USDT2
2981 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2982 #else /* USDT2 */
2983 HOTSPOT_THREAD_SLEEP_END(
2984 0);
2985 #endif /* USDT2 */
2986 JVM_END
2987
2988 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2989 JVMWrapper("JVM_CurrentThread");
2990 oop jthread = thread->threadObj();
2991 assert (thread != NULL, "no current thread!");
2992 return JNIHandles::make_local(env, jthread);
2993 JVM_END
2994
2995
2996 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2997 JVMWrapper("JVM_CountStackFrames");
2998
2999 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3000 oop java_thread = JNIHandles::resolve_non_null(jthread);
3001 bool throw_illegal_thread_state = false;
3002 int count = 0;
3003
3004 {
3005 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3006 // We need to re-resolve the java_thread, since a GC might have happened during the
3007 // acquire of the lock
3008 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3009
3010 if (thr == NULL) {
3011 // do nothing
3012 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3013 // Check whether this java thread has been suspended already. If not, throws
3014 // IllegalThreadStateException. We defer to throw that exception until
3015 // Threads_lock is released since loading exception class has to leave VM.
3016 // The correct way to test a thread is actually suspended is
3017 // wait_for_ext_suspend_completion(), but we can't call that while holding
3018 // the Threads_lock. The above tests are sufficient for our purposes
3019 // provided the walkability of the stack is stable - which it isn't
3020 // 100% but close enough for most practical purposes.
3021 throw_illegal_thread_state = true;
3022 } else {
3023 // Count all java activation, i.e., number of vframes
3024 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3025 // Native frames are not counted
3026 if (!vfst.method()->is_native()) count++;
3027 }
3028 }
3029 }
3030
3031 if (throw_illegal_thread_state) {
3032 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3033 "this thread is not suspended");
3034 }
3035 return count;
3036 JVM_END
3037
3038 // Consider: A better way to implement JVM_Interrupt() is to acquire
3039 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3040 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3041 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3042 // outside the critical section. Threads_lock is hot so we want to minimize
3043 // the hold-time. A cleaner interface would be to decompose interrupt into
3044 // two steps. The 1st phase, performed under Threads_lock, would return
3045 // a closure that'd be invoked after Threads_lock was dropped.
3046 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3047 // admit spurious wakeups.
3048
3049 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3050 JVMWrapper("JVM_Interrupt");
3051
3052 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3053 oop java_thread = JNIHandles::resolve_non_null(jthread);
3054 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3055 // We need to re-resolve the java_thread, since a GC might have happened during the
3056 // acquire of the lock
3057 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3058 if (thr != NULL) {
3059 Thread::interrupt(thr);
3060 }
3061 JVM_END
3062
3063
3064 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3065 JVMWrapper("JVM_IsInterrupted");
3066
3067 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3068 oop java_thread = JNIHandles::resolve_non_null(jthread);
3069 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3070 // We need to re-resolve the java_thread, since a GC might have happened during the
3071 // acquire of the lock
3072 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3073 if (thr == NULL) {
3074 return JNI_FALSE;
3075 } else {
3076 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3077 }
3078 JVM_END
3079
3080
3081 // Return true iff the current thread has locked the object passed in
3082
3083 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3084 JVMWrapper("JVM_HoldsLock");
3085 assert(THREAD->is_Java_thread(), "sanity check");
3086 if (obj == NULL) {
3087 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3088 }
3089 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3090 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3091 JVM_END
3092
3093
3094 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3095 JVMWrapper("JVM_DumpAllStacks");
3096 VM_PrintThreads op;
3097 VMThread::execute(&op);
3098 if (JvmtiExport::should_post_data_dump()) {
3099 JvmtiExport::post_data_dump();
3100 }
3101 JVM_END
3102
3103 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3104 JVMWrapper("JVM_SetNativeThreadName");
3105 ResourceMark rm(THREAD);
3106 oop java_thread = JNIHandles::resolve_non_null(jthread);
3107 JavaThread* thr = java_lang_Thread::thread(java_thread);
3108 // Thread naming only supported for the current thread, doesn't work for
3109 // target threads.
3110 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3111 // we don't set the name of an attached thread to avoid stepping
3112 // on other programs
3113 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3114 os::set_native_thread_name(thread_name);
3115 }
3116 JVM_END
3117
3118 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3119
3120 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3121 assert(jthread->is_Java_thread(), "must be a Java thread");
3122 if (jthread->privileged_stack_top() == NULL) return false;
3123 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3124 oop loader = jthread->privileged_stack_top()->class_loader();
3125 if (loader == NULL) return true;
3126 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3127 if (trusted) return true;
3128 }
3129 return false;
3130 }
3131
3132 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3133 JVMWrapper("JVM_CurrentLoadedClass");
3134 ResourceMark rm(THREAD);
3135
3136 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3137 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3138 bool trusted = is_trusted_frame(thread, &vfst);
3139 if (trusted) return NULL;
3140
3141 methodOop m = vfst.method();
3142 if (!m->is_native()) {
3143 klassOop holder = m->method_holder();
3144 oop loader = instanceKlass::cast(holder)->class_loader();
3145 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3146 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3147 }
3148 }
3149 }
3150 return NULL;
3151 JVM_END
3152
3153
3154 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3155 JVMWrapper("JVM_CurrentClassLoader");
3156 ResourceMark rm(THREAD);
3157
3158 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3159
3160 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3161 bool trusted = is_trusted_frame(thread, &vfst);
3162 if (trusted) return NULL;
3163
3164 methodOop m = vfst.method();
3165 if (!m->is_native()) {
3166 klassOop holder = m->method_holder();
3167 assert(holder->is_klass(), "just checking");
3168 oop loader = instanceKlass::cast(holder)->class_loader();
3169 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3170 return JNIHandles::make_local(env, loader);
3171 }
3172 }
3173 }
3174 return NULL;
3175 JVM_END
3176
3177
3178 // Utility object for collecting method holders walking down the stack
3179 class KlassLink: public ResourceObj {
3180 public:
3181 KlassHandle klass;
3182 KlassLink* next;
3183
3184 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3185 };
3186
3187
3188 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3189 JVMWrapper("JVM_GetClassContext");
3190 ResourceMark rm(THREAD);
3191 JvmtiVMObjectAllocEventCollector oam;
3192 // Collect linked list of (handles to) method holders
3193 KlassLink* first = NULL;
3194 KlassLink* last = NULL;
3195 int depth = 0;
3196
3197 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3198 // Native frames are not returned
3199 if (!vfst.method()->is_native()) {
3200 klassOop holder = vfst.method()->method_holder();
3201 assert(holder->is_klass(), "just checking");
3202 depth++;
3203 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3204 if (first == NULL) {
3205 first = last = l;
3206 } else {
3207 last->next = l;
3208 last = l;
3209 }
3210 }
3211 }
3212
3213 // Create result array of type [Ljava/lang/Class;
3214 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3215 // Fill in mirrors corresponding to method holders
3216 int index = 0;
3217 while (first != NULL) {
3218 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3219 first = first->next;
3220 }
3221 assert(index == depth, "just checking");
3222
3223 return (jobjectArray) JNIHandles::make_local(env, result);
3224 JVM_END
3225
3226
3227 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3228 JVMWrapper("JVM_ClassDepth");
3229 ResourceMark rm(THREAD);
3230 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3231 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3232
3233 const char* str = java_lang_String::as_utf8_string(class_name_str());
3234 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3235 if (class_name_sym == NULL) {
3236 return -1;
3237 }
3238
3239 int depth = 0;
3240
3241 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3242 if (!vfst.method()->is_native()) {
3243 klassOop holder = vfst.method()->method_holder();
3244 assert(holder->is_klass(), "just checking");
3245 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3246 return depth;
3247 }
3248 depth++;
3249 }
3250 }
3251 return -1;
3252 JVM_END
3253
3254
3255 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3256 JVMWrapper("JVM_ClassLoaderDepth");
3257 ResourceMark rm(THREAD);
3258 int depth = 0;
3259 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3260 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3261 bool trusted = is_trusted_frame(thread, &vfst);
3262 if (trusted) return -1;
3263
3264 methodOop m = vfst.method();
3265 if (!m->is_native()) {
3266 klassOop holder = m->method_holder();
3267 assert(holder->is_klass(), "just checking");
3268 oop loader = instanceKlass::cast(holder)->class_loader();
3269 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3270 return depth;
3271 }
3272 depth++;
3273 }
3274 }
3275 return -1;
3276 JVM_END
3277
3278
3279 // java.lang.Package ////////////////////////////////////////////////////////////////
3280
3281
3282 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3283 JVMWrapper("JVM_GetSystemPackage");
3284 ResourceMark rm(THREAD);
3285 JvmtiVMObjectAllocEventCollector oam;
3286 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3287 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3288 return (jstring) JNIHandles::make_local(result);
3289 JVM_END
3290
3291
3292 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3293 JVMWrapper("JVM_GetSystemPackages");
3294 JvmtiVMObjectAllocEventCollector oam;
3295 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3296 return (jobjectArray) JNIHandles::make_local(result);
3297 JVM_END
3298
3299
3300 // ObjectInputStream ///////////////////////////////////////////////////////////////
3301
3302 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3303 if (current_class == NULL) {
3304 return true;
3305 }
3306 if ((current_class == field_class) || access.is_public()) {
3307 return true;
3308 }
3309
3310 if (access.is_protected()) {
3311 // See if current_class is a subclass of field_class
3312 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3313 return true;
3314 }
3315 }
3316
3317 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3318 }
3319
3320
3321 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3322 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3323 JVMWrapper("JVM_AllocateNewObject");
3324 JvmtiVMObjectAllocEventCollector oam;
3325 // Receiver is not used
3326 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3327 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3328
3329 // Cannot instantiate primitive types
3330 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3331 ResourceMark rm(THREAD);
3332 THROW_0(vmSymbols::java_lang_InvalidClassException());
3333 }
3334
3335 // Arrays not allowed here, must use JVM_AllocateNewArray
3336 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3337 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3338 ResourceMark rm(THREAD);
3339 THROW_0(vmSymbols::java_lang_InvalidClassException());
3340 }
3341
3342 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3343 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3344
3345 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3346
3347 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3348 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3349
3350 // Make sure klass is initialized, since we are about to instantiate one of them.
3351 curr_klass->initialize(CHECK_NULL);
3352
3353 methodHandle m (THREAD,
3354 init_klass->find_method(vmSymbols::object_initializer_name(),
3355 vmSymbols::void_method_signature()));
3356 if (m.is_null()) {
3357 ResourceMark rm(THREAD);
3358 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3359 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3360 vmSymbols::object_initializer_name(),
3361 vmSymbols::void_method_signature()));
3362 }
3363
3364 if (curr_klass == init_klass && !m->is_public()) {
3365 // Calling the constructor for class 'curr_klass'.
3366 // Only allow calls to a public no-arg constructor.
3367 // This path corresponds to creating an Externalizable object.
3368 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3369 }
3370
3371 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3372 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3373 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3374 }
3375
3376 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3377 // Call constructor m. This might call a constructor higher up in the hierachy
3378 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3379
3380 return JNIHandles::make_local(obj());
3381 JVM_END
3382
3383
3384 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3385 JVMWrapper("JVM_AllocateNewArray");
3386 JvmtiVMObjectAllocEventCollector oam;
3387 oop mirror = JNIHandles::resolve_non_null(currClass);
3388
3389 if (java_lang_Class::is_primitive(mirror)) {
3390 THROW_0(vmSymbols::java_lang_InvalidClassException());
3391 }
3392 klassOop k = java_lang_Class::as_klassOop(mirror);
3393 oop result;
3394
3395 if (k->klass_part()->oop_is_typeArray()) {
3396 // typeArray
3397 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3398 } else if (k->klass_part()->oop_is_objArray()) {
3399 // objArray
3400 objArrayKlassHandle oak(THREAD, k);
3401 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3402 result = oak->allocate(length, CHECK_NULL);
3403 } else {
3404 THROW_0(vmSymbols::java_lang_InvalidClassException());
3405 }
3406 return JNIHandles::make_local(env, result);
3407 JVM_END
3408
3409
3410 // Return the first non-null class loader up the execution stack, or null
3411 // if only code from the null class loader is on the stack.
3412
3413 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3414 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3415 // UseNewReflection
3416 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3417 klassOop holder = vfst.method()->method_holder();
3418 oop loader = instanceKlass::cast(holder)->class_loader();
3419 if (loader != NULL) {
3420 return JNIHandles::make_local(env, loader);
3421 }
3422 }
3423 return NULL;
3424 JVM_END
3425
3426
3427 // Load a class relative to the most recent class on the stack with a non-null
3428 // classloader.
3429 // This function has been deprecated and should not be considered part of the
3430 // specified JVM interface.
3431
3432 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3433 jclass currClass, jstring currClassName))
3434 JVMWrapper("JVM_LoadClass0");
3435 // Receiver is not used
3436 ResourceMark rm(THREAD);
3437
3438 // Class name argument is not guaranteed to be in internal format
3439 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3440 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3441
3442 const char* str = java_lang_String::as_utf8_string(string());
3443
3444 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3445 // It's impossible to create this class; the name cannot fit
3446 // into the constant pool.
3447 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3448 }
3449
3450 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3451 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3452 // Find the most recent class on the stack with a non-null classloader
3453 oop loader = NULL;
3454 oop protection_domain = NULL;
3455 if (curr_klass.is_null()) {
3456 for (vframeStream vfst(thread);
3457 !vfst.at_end() && loader == NULL;
3458 vfst.next()) {
3459 if (!vfst.method()->is_native()) {
3460 klassOop holder = vfst.method()->method_holder();
3461 loader = instanceKlass::cast(holder)->class_loader();
3462 protection_domain = instanceKlass::cast(holder)->protection_domain();
3463 }
3464 }
3465 } else {
3466 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3467 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3468 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3469 }
3470 Handle h_loader(THREAD, loader);
3471 Handle h_prot (THREAD, protection_domain);
3472 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3473 false, thread);
3474 if (TraceClassResolution && result != NULL) {
3475 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3476 }
3477 return result;
3478 JVM_END
3479
3480
3481 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3482
3483
3484 // resolve array handle and check arguments
3485 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3486 if (arr == NULL) {
3487 THROW_0(vmSymbols::java_lang_NullPointerException());
3488 }
3489 oop a = JNIHandles::resolve_non_null(arr);
3490 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3491 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3492 }
3493 return arrayOop(a);
3494 }
3495
3496
3497 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3498 JVMWrapper("JVM_GetArrayLength");
3499 arrayOop a = check_array(env, arr, false, CHECK_0);
3500 return a->length();
3501 JVM_END
3502
3503
3504 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3505 JVMWrapper("JVM_Array_Get");
3506 JvmtiVMObjectAllocEventCollector oam;
3507 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3508 jvalue value;
3509 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3510 oop box = Reflection::box(&value, type, CHECK_NULL);
3511 return JNIHandles::make_local(env, box);
3512 JVM_END
3513
3514
3515 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3516 JVMWrapper("JVM_GetPrimitiveArrayElement");
3517 jvalue value;
3518 value.i = 0; // to initialize value before getting used in CHECK
3519 arrayOop a = check_array(env, arr, true, CHECK_(value));
3520 assert(a->is_typeArray(), "just checking");
3521 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3522 BasicType wide_type = (BasicType) wCode;
3523 if (type != wide_type) {
3524 Reflection::widen(&value, type, wide_type, CHECK_(value));
3525 }
3526 return value;
3527 JVM_END
3528
3529
3530 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3531 JVMWrapper("JVM_SetArrayElement");
3532 arrayOop a = check_array(env, arr, false, CHECK);
3533 oop box = JNIHandles::resolve(val);
3534 jvalue value;
3535 value.i = 0; // to initialize value before getting used in CHECK
3536 BasicType value_type;
3537 if (a->is_objArray()) {
3538 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3539 value_type = Reflection::unbox_for_regular_object(box, &value);
3540 } else {
3541 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3542 }
3543 Reflection::array_set(&value, a, index, value_type, CHECK);
3544 JVM_END
3545
3546
3547 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3548 JVMWrapper("JVM_SetPrimitiveArrayElement");
3549 arrayOop a = check_array(env, arr, true, CHECK);
3550 assert(a->is_typeArray(), "just checking");
3551 BasicType value_type = (BasicType) vCode;
3552 Reflection::array_set(&v, a, index, value_type, CHECK);
3553 JVM_END
3554
3555
3556 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3557 JVMWrapper("JVM_NewArray");
3558 JvmtiVMObjectAllocEventCollector oam;
3559 oop element_mirror = JNIHandles::resolve(eltClass);
3560 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3561 return JNIHandles::make_local(env, result);
3562 JVM_END
3563
3564
3565 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3566 JVMWrapper("JVM_NewMultiArray");
3567 JvmtiVMObjectAllocEventCollector oam;
3568 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3569 oop element_mirror = JNIHandles::resolve(eltClass);
3570 assert(dim_array->is_typeArray(), "just checking");
3571 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3572 return JNIHandles::make_local(env, result);
3573 JVM_END
3574
3575
3576 // Networking library support ////////////////////////////////////////////////////////////////////
3577
3578 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3579 JVMWrapper("JVM_InitializeSocketLibrary");
3580 return 0;
3581 JVM_END
3582
3583
3584 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3585 JVMWrapper("JVM_Socket");
3586 return os::socket(domain, type, protocol);
3587 JVM_END
3588
3589
3590 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3591 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3592 //%note jvm_r6
3593 return os::socket_close(fd);
3594 JVM_END
3595
3596
3597 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3598 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3599 //%note jvm_r6
3600 return os::socket_shutdown(fd, howto);
3601 JVM_END
3602
3603
3604 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3605 JVMWrapper2("JVM_Recv (0x%x)", fd);
3606 //%note jvm_r6
3607 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3608 JVM_END
3609
3610
3611 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3612 JVMWrapper2("JVM_Send (0x%x)", fd);
3613 //%note jvm_r6
3614 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3615 JVM_END
3616
3617
3618 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3619 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3620 //%note jvm_r6
3621 return os::timeout(fd, timeout);
3622 JVM_END
3623
3624
3625 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3626 JVMWrapper2("JVM_Listen (0x%x)", fd);
3627 //%note jvm_r6
3628 return os::listen(fd, count);
3629 JVM_END
3630
3631
3632 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3633 JVMWrapper2("JVM_Connect (0x%x)", fd);
3634 //%note jvm_r6
3635 return os::connect(fd, him, (socklen_t)len);
3636 JVM_END
3637
3638
3639 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3640 JVMWrapper2("JVM_Bind (0x%x)", fd);
3641 //%note jvm_r6
3642 return os::bind(fd, him, (socklen_t)len);
3643 JVM_END
3644
3645
3646 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3647 JVMWrapper2("JVM_Accept (0x%x)", fd);
3648 //%note jvm_r6
3649 socklen_t socklen = (socklen_t)(*len);
3650 jint result = os::accept(fd, him, &socklen);
3651 *len = (jint)socklen;
3652 return result;
3653 JVM_END
3654
3655
3656 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3657 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3658 //%note jvm_r6
3659 socklen_t socklen = (socklen_t)(*fromlen);
3660 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3661 *fromlen = (int)socklen;
3662 return result;
3663 JVM_END
3664
3665
3666 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3667 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3668 //%note jvm_r6
3669 socklen_t socklen = (socklen_t)(*len);
3670 jint result = os::get_sock_name(fd, him, &socklen);
3671 *len = (int)socklen;
3672 return result;
3673 JVM_END
3674
3675
3676 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3677 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3678 //%note jvm_r6
3679 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3680 JVM_END
3681
3682
3683 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3684 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3685 //%note jvm_r6
3686 return os::socket_available(fd, pbytes);
3687 JVM_END
3688
3689
3690 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3691 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3692 //%note jvm_r6
3693 socklen_t socklen = (socklen_t)(*optlen);
3694 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3695 *optlen = (int)socklen;
3696 return result;
3697 JVM_END
3698
3699
3700 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3701 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3702 //%note jvm_r6
3703 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3704 JVM_END
3705
3706
3707 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3708 JVMWrapper("JVM_GetHostName");
3709 return os::get_host_name(name, namelen);
3710 JVM_END
3711
3712
3713 // Library support ///////////////////////////////////////////////////////////////////////////
3714
3715 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3716 //%note jvm_ct
3717 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3718 char ebuf[1024];
3719 void *load_result;
3720 {
3721 ThreadToNativeFromVM ttnfvm(thread);
3722 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3723 }
3724 if (load_result == NULL) {
3725 char msg[1024];
3726 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3727 // Since 'ebuf' may contain a string encoded using
3728 // platform encoding scheme, we need to pass
3729 // Exceptions::unsafe_to_utf8 to the new_exception method
3730 // as the last argument. See bug 6367357.
3731 Handle h_exception =
3732 Exceptions::new_exception(thread,
3733 vmSymbols::java_lang_UnsatisfiedLinkError(),
3734 msg, Exceptions::unsafe_to_utf8);
3735
3736 THROW_HANDLE_0(h_exception);
3737 }
3738 return load_result;
3739 JVM_END
3740
3741
3742 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3743 JVMWrapper("JVM_UnloadLibrary");
3744 os::dll_unload(handle);
3745 JVM_END
3746
3747
3748 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3749 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3750 return os::dll_lookup(handle, name);
3751 JVM_END
3752
3753
3754 // Floating point support ////////////////////////////////////////////////////////////////////
3755
3756 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3757 JVMWrapper("JVM_IsNaN");
3758 return g_isnan(a);
3759 JVM_END
3760
3761
3762 // JNI version ///////////////////////////////////////////////////////////////////////////////
3763
3764 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3765 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3766 return Threads::is_supported_jni_version_including_1_1(version);
3767 JVM_END
3768
3769
3770 // String support ///////////////////////////////////////////////////////////////////////////
3771
3772 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3773 JVMWrapper("JVM_InternString");
3774 JvmtiVMObjectAllocEventCollector oam;
3775 if (str == NULL) return NULL;
3776 oop string = JNIHandles::resolve_non_null(str);
3777 oop result = StringTable::intern(string, CHECK_NULL);
3778 return (jstring) JNIHandles::make_local(env, result);
3779 JVM_END
3780
3781
3782 // Raw monitor support //////////////////////////////////////////////////////////////////////
3783
3784 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3785 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3786 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3787 // that only works with java threads.
3788
3789
3790 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3791 VM_Exit::block_if_vm_exited();
3792 JVMWrapper("JVM_RawMonitorCreate");
3793 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3794 }
3795
3796
3797 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3798 VM_Exit::block_if_vm_exited();
3799 JVMWrapper("JVM_RawMonitorDestroy");
3800 delete ((Mutex*) mon);
3801 }
3802
3803
3804 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3805 VM_Exit::block_if_vm_exited();
3806 JVMWrapper("JVM_RawMonitorEnter");
3807 ((Mutex*) mon)->jvm_raw_lock();
3808 return 0;
3809 }
3810
3811
3812 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3813 VM_Exit::block_if_vm_exited();
3814 JVMWrapper("JVM_RawMonitorExit");
3815 ((Mutex*) mon)->jvm_raw_unlock();
3816 }
3817
3818
3819 // Support for Serialization
3820
3821 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3822 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3823 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3824 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3825
3826 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3827 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3828 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3829 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3830
3831
3832 void initialize_converter_functions() {
3833 if (JDK_Version::is_gte_jdk14x_version()) {
3834 // These functions only exist for compatibility with 1.3.1 and earlier
3835 return;
3836 }
3837
3838 // called from universe_post_init()
3839 assert(
3840 int_bits_to_float_fn == NULL &&
3841 long_bits_to_double_fn == NULL &&
3842 float_to_int_bits_fn == NULL &&
3843 double_to_long_bits_fn == NULL ,
3844 "initialization done twice"
3845 );
3846 // initialize
3847 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3848 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3849 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3850 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3851 // verify
3852 assert(
3853 int_bits_to_float_fn != NULL &&
3854 long_bits_to_double_fn != NULL &&
3855 float_to_int_bits_fn != NULL &&
3856 double_to_long_bits_fn != NULL ,
3857 "initialization failed"
3858 );
3859 }
3860
3861
3862 // Serialization
3863 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3864 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3865 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3866
3867 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3868 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3869 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3870 oop o = JNIHandles::resolve(obj);
3871
3872 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3873 THROW(vmSymbols::java_lang_NullPointerException());
3874 }
3875
3876 jsize nfids = fids->length();
3877 if (nfids == 0) return;
3878
3879 if (tcodes->length() < nfids) {
3880 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3881 }
3882
3883 jsize off = 0;
3884 /* loop through fields, setting values */
3885 for (jsize i = 0; i < nfids; i++) {
3886 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3887 int field_offset;
3888 if (fid != NULL) {
3889 // NULL is a legal value for fid, but retrieving the field offset
3890 // trigger assertion in that case
3891 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3892 }
3893
3894 switch (tcodes->char_at(i)) {
3895 case 'Z':
3896 if (fid != NULL) {
3897 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3898 o->bool_field_put(field_offset, val);
3899 }
3900 off++;
3901 break;
3902
3903 case 'B':
3904 if (fid != NULL) {
3905 o->byte_field_put(field_offset, dbuf->byte_at(off));
3906 }
3907 off++;
3908 break;
3909
3910 case 'C':
3911 if (fid != NULL) {
3912 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3913 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3914 o->char_field_put(field_offset, val);
3915 }
3916 off += 2;
3917 break;
3918
3919 case 'S':
3920 if (fid != NULL) {
3921 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3922 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3923 o->short_field_put(field_offset, val);
3924 }
3925 off += 2;
3926 break;
3927
3928 case 'I':
3929 if (fid != NULL) {
3930 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3931 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3932 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3933 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3934 o->int_field_put(field_offset, ival);
3935 }
3936 off += 4;
3937 break;
3938
3939 case 'F':
3940 if (fid != NULL) {
3941 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3942 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3943 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3944 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3945 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3946 o->float_field_put(field_offset, fval);
3947 }
3948 off += 4;
3949 break;
3950
3951 case 'J':
3952 if (fid != NULL) {
3953 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3954 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3955 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3956 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3957 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3958 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3959 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3960 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3961 o->long_field_put(field_offset, lval);
3962 }
3963 off += 8;
3964 break;
3965
3966 case 'D':
3967 if (fid != NULL) {
3968 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3969 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3970 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3971 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3972 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3973 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3974 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3975 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3976 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3977 o->double_field_put(field_offset, dval);
3978 }
3979 off += 8;
3980 break;
3981
3982 default:
3983 // Illegal typecode
3984 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3985 }
3986 }
3987 JVM_END
3988
3989
3990 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3991 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3992 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3993
3994 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3995 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3996 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3997 oop o = JNIHandles::resolve(obj);
3998
3999 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4000 THROW(vmSymbols::java_lang_NullPointerException());
4001 }
4002
4003 jsize nfids = fids->length();
4004 if (nfids == 0) return;
4005
4006 if (tcodes->length() < nfids) {
4007 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4008 }
4009
4010 /* loop through fields, fetching values */
4011 jsize off = 0;
4012 for (jsize i = 0; i < nfids; i++) {
4013 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4014 if (fid == NULL) {
4015 THROW(vmSymbols::java_lang_NullPointerException());
4016 }
4017 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4018
4019 switch (tcodes->char_at(i)) {
4020 case 'Z':
4021 {
4022 jboolean val = o->bool_field(field_offset);
4023 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4024 }
4025 break;
4026
4027 case 'B':
4028 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4029 break;
4030
4031 case 'C':
4032 {
4033 jchar val = o->char_field(field_offset);
4034 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4035 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4036 }
4037 break;
4038
4039 case 'S':
4040 {
4041 jshort val = o->short_field(field_offset);
4042 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4043 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4044 }
4045 break;
4046
4047 case 'I':
4048 {
4049 jint val = o->int_field(field_offset);
4050 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4051 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4052 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4053 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4054 }
4055 break;
4056
4057 case 'F':
4058 {
4059 jfloat fval = o->float_field(field_offset);
4060 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4061 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4062 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4063 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4064 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4065 }
4066 break;
4067
4068 case 'J':
4069 {
4070 jlong val = o->long_field(field_offset);
4071 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4072 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4073 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4074 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4075 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4076 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4077 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4078 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4079 }
4080 break;
4081
4082 case 'D':
4083 {
4084 jdouble dval = o->double_field(field_offset);
4085 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4086 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4087 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4088 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4089 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4090 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4091 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4092 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4093 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4094 }
4095 break;
4096
4097 default:
4098 // Illegal typecode
4099 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4100 }
4101 }
4102 JVM_END
4103
4104
4105 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4106
4107 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4108 // Security Note:
4109 // The Java level wrapper will perform the necessary security check allowing
4110 // us to pass the NULL as the initiating class loader.
4111 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4112
4113 KlassHandle klass_handle(THREAD, klass);
4114 // Check if we should initialize the class
4115 if (init && klass_handle->oop_is_instance()) {
4116 klass_handle->initialize(CHECK_NULL);
4117 }
4118 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4119 }
4120
4121
4122 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4123
4124 #ifndef PRODUCT
4125
4126 extern "C" {
4127 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4128 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4129 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4130 }
4131
4132 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4133 JVMWrapper("JVM_AccessBoolVMFlag");
4134 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4135 JVM_END
4136
4137 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4138 JVMWrapper("JVM_AccessVMIntFlag");
4139 intx v;
4140 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4141 *value = (jint)v;
4142 return result;
4143 JVM_END
4144
4145
4146 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4147 JVMWrapper("JVM_VMBreakPoint");
4148 oop the_obj = JNIHandles::resolve(obj);
4149 BREAKPOINT;
4150 JVM_END
4151
4152
4153 #endif
4154
4155
4156 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4157
4158 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4159 JVMWrapper("JVM_InvokeMethod");
4160 Handle method_handle;
4161 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4162 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4163 Handle receiver(THREAD, JNIHandles::resolve(obj));
4164 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4165 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4166 jobject res = JNIHandles::make_local(env, result);
4167 if (JvmtiExport::should_post_vm_object_alloc()) {
4168 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4169 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4170 if (java_lang_Class::is_primitive(ret_type)) {
4171 // Only for primitive type vm allocates memory for java object.
4172 // See box() method.
4173 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4174 }
4175 }
4176 return res;
4177 } else {
4178 THROW_0(vmSymbols::java_lang_StackOverflowError());
4179 }
4180 JVM_END
4181
4182
4183 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4184 JVMWrapper("JVM_NewInstanceFromConstructor");
4185 oop constructor_mirror = JNIHandles::resolve(c);
4186 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4187 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4188 jobject res = JNIHandles::make_local(env, result);
4189 if (JvmtiExport::should_post_vm_object_alloc()) {
4190 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4191 }
4192 return res;
4193 JVM_END
4194
4195 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4196
4197 JVM_LEAF(jboolean, JVM_SupportsCX8())
4198 JVMWrapper("JVM_SupportsCX8");
4199 return VM_Version::supports_cx8();
4200 JVM_END
4201
4202
4203 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4204 JVMWrapper("JVM_CX8Field");
4205 jlong res;
4206 oop o = JNIHandles::resolve(obj);
4207 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4208 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4209
4210 assert(VM_Version::supports_cx8(), "cx8 not supported");
4211 res = Atomic::cmpxchg(newVal, addr, oldVal);
4212
4213 return res == oldVal;
4214 JVM_END
4215
4216 // DTrace ///////////////////////////////////////////////////////////////////
4217
4218 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4219 JVMWrapper("JVM_DTraceGetVersion");
4220 return (jint)JVM_TRACING_DTRACE_VERSION;
4221 JVM_END
4222
4223 JVM_ENTRY(jlong,JVM_DTraceActivate(
4224 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4225 JVM_DTraceProvider* providers))
4226 JVMWrapper("JVM_DTraceActivate");
4227 return DTraceJSDT::activate(
4228 version, module_name, providers_count, providers, CHECK_0);
4229 JVM_END
4230
4231 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4232 JVMWrapper("JVM_DTraceIsProbeEnabled");
4233 return DTraceJSDT::is_probe_enabled(method);
4234 JVM_END
4235
4236 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4237 JVMWrapper("JVM_DTraceDispose");
4238 DTraceJSDT::dispose(handle);
4239 JVM_END
4240
4241 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4242 JVMWrapper("JVM_DTraceIsSupported");
4243 return DTraceJSDT::is_supported();
4244 JVM_END
4245
4246 // Returns an array of all live Thread objects (VM internal JavaThreads,
4247 // jvmti agent threads, and JNI attaching threads are skipped)
4248 // See CR 6404306 regarding JNI attaching threads
4249 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4250 ResourceMark rm(THREAD);
4251 ThreadsListEnumerator tle(THREAD, false, false);
4252 JvmtiVMObjectAllocEventCollector oam;
4253
4254 int num_threads = tle.num_threads();
4255 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4256 objArrayHandle threads_ah(THREAD, r);
4257
4258 for (int i = 0; i < num_threads; i++) {
4259 Handle h = tle.get_threadObj(i);
4260 threads_ah->obj_at_put(i, h());
4261 }
4262
4263 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4264 JVM_END
4265
4266
4267 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4268 // Return StackTraceElement[][], each element is the stack trace of a thread in
4269 // the corresponding entry in the given threads array
4270 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4271 JVMWrapper("JVM_DumpThreads");
4272 JvmtiVMObjectAllocEventCollector oam;
4273
4274 // Check if threads is null
4275 if (threads == NULL) {
4276 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4277 }
4278
4279 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4280 objArrayHandle ah(THREAD, a);
4281 int num_threads = ah->length();
4282 // check if threads is non-empty array
4283 if (num_threads == 0) {
4284 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4285 }
4286
4287 // check if threads is not an array of objects of Thread class
4288 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4289 if (k != SystemDictionary::Thread_klass()) {
4290 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4291 }
4292
4293 ResourceMark rm(THREAD);
4294
4295 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4296 for (int i = 0; i < num_threads; i++) {
4297 oop thread_obj = ah->obj_at(i);
4298 instanceHandle h(THREAD, (instanceOop) thread_obj);
4299 thread_handle_array->append(h);
4300 }
4301
4302 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4303 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4304
4305 JVM_END
4306
4307 // JVM monitoring and management support
4308 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4309 return Management::get_jmm_interface(version);
4310 JVM_END
4311
4312 // com.sun.tools.attach.VirtualMachine agent properties support
4313 //
4314 // Initialize the agent properties with the properties maintained in the VM
4315 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4316 JVMWrapper("JVM_InitAgentProperties");
4317 ResourceMark rm;
4318
4319 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4320
4321 PUTPROP(props, "sun.java.command", Arguments::java_command());
4322 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4323 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4324 return properties;
4325 JVM_END
4326
4327 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4328 {
4329 JVMWrapper("JVM_GetEnclosingMethodInfo");
4330 JvmtiVMObjectAllocEventCollector oam;
4331
4332 if (ofClass == NULL) {
4333 return NULL;
4334 }
4335 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4336 // Special handling for primitive objects
4337 if (java_lang_Class::is_primitive(mirror())) {
4338 return NULL;
4339 }
4340 klassOop k = java_lang_Class::as_klassOop(mirror());
4341 if (!Klass::cast(k)->oop_is_instance()) {
4342 return NULL;
4343 }
4344 instanceKlassHandle ik_h(THREAD, k);
4345 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4346 if (encl_method_class_idx == 0) {
4347 return NULL;
4348 }
4349 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4350 objArrayHandle dest(THREAD, dest_o);
4351 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4352 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4353 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4354 if (encl_method_method_idx != 0) {
4355 Symbol* sym = ik_h->constants()->symbol_at(
4356 extract_low_short_from_int(
4357 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4358 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4359 dest->obj_at_put(1, str());
4360 sym = ik_h->constants()->symbol_at(
4361 extract_high_short_from_int(
4362 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4363 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4364 dest->obj_at_put(2, str());
4365 }
4366 return (jobjectArray) JNIHandles::make_local(dest());
4367 }
4368 JVM_END
4369
4370 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4371 jint javaThreadState))
4372 {
4373 // If new thread states are added in future JDK and VM versions,
4374 // this should check if the JDK version is compatible with thread
4375 // states supported by the VM. Return NULL if not compatible.
4376 //
4377 // This function must map the VM java_lang_Thread::ThreadStatus
4378 // to the Java thread state that the JDK supports.
4379 //
4380
4381 typeArrayHandle values_h;
4382 switch (javaThreadState) {
4383 case JAVA_THREAD_STATE_NEW : {
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::NEW);
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_RUNNABLE : {
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::RUNNABLE);
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_BLOCKED : {
4396 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4397 values_h = typeArrayHandle(THREAD, r);
4398 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4399 break;
4400 }
4401 case JAVA_THREAD_STATE_WAITING : {
4402 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4403 values_h = typeArrayHandle(THREAD, r);
4404 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4405 values_h->int_at_put(1, java_lang_Thread::PARKED);
4406 break;
4407 }
4408 case JAVA_THREAD_STATE_TIMED_WAITING : {
4409 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4410 values_h = typeArrayHandle(THREAD, r);
4411 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4412 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4413 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4414 break;
4415 }
4416 case JAVA_THREAD_STATE_TERMINATED : {
4417 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4418 values_h = typeArrayHandle(THREAD, r);
4419 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4420 break;
4421 }
4422 default:
4423 // Unknown state - probably incompatible JDK version
4424 return NULL;
4425 }
4426
4427 return (jintArray) JNIHandles::make_local(env, values_h());
4428 }
4429 JVM_END
4430
4431
4432 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4433 jint javaThreadState,
4434 jintArray values))
4435 {
4436 // If new thread states are added in future JDK and VM versions,
4437 // this should check if the JDK version is compatible with thread
4438 // states supported by the VM. Return NULL if not compatible.
4439 //
4440 // This function must map the VM java_lang_Thread::ThreadStatus
4441 // to the Java thread state that the JDK supports.
4442 //
4443
4444 ResourceMark rm;
4445
4446 // Check if threads is null
4447 if (values == NULL) {
4448 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4449 }
4450
4451 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4452 typeArrayHandle values_h(THREAD, v);
4453
4454 objArrayHandle names_h;
4455 switch (javaThreadState) {
4456 case JAVA_THREAD_STATE_NEW : {
4457 assert(values_h->length() == 1 &&
4458 values_h->int_at(0) == java_lang_Thread::NEW,
4459 "Invalid threadStatus value");
4460
4461 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4462 1, /* only 1 substate */
4463 CHECK_NULL);
4464 names_h = objArrayHandle(THREAD, r);
4465 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4466 names_h->obj_at_put(0, name());
4467 break;
4468 }
4469 case JAVA_THREAD_STATE_RUNNABLE : {
4470 assert(values_h->length() == 1 &&
4471 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4472 "Invalid threadStatus value");
4473
4474 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4475 1, /* only 1 substate */
4476 CHECK_NULL);
4477 names_h = objArrayHandle(THREAD, r);
4478 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4479 names_h->obj_at_put(0, name());
4480 break;
4481 }
4482 case JAVA_THREAD_STATE_BLOCKED : {
4483 assert(values_h->length() == 1 &&
4484 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4485 "Invalid threadStatus value");
4486
4487 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4488 1, /* only 1 substate */
4489 CHECK_NULL);
4490 names_h = objArrayHandle(THREAD, r);
4491 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4492 names_h->obj_at_put(0, name());
4493 break;
4494 }
4495 case JAVA_THREAD_STATE_WAITING : {
4496 assert(values_h->length() == 2 &&
4497 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4498 values_h->int_at(1) == java_lang_Thread::PARKED,
4499 "Invalid threadStatus value");
4500 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4501 2, /* number of substates */
4502 CHECK_NULL);
4503 names_h = objArrayHandle(THREAD, r);
4504 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4505 CHECK_NULL);
4506 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4507 CHECK_NULL);
4508 names_h->obj_at_put(0, name0());
4509 names_h->obj_at_put(1, name1());
4510 break;
4511 }
4512 case JAVA_THREAD_STATE_TIMED_WAITING : {
4513 assert(values_h->length() == 3 &&
4514 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4515 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4516 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4517 "Invalid threadStatus value");
4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4519 3, /* number of substates */
4520 CHECK_NULL);
4521 names_h = objArrayHandle(THREAD, r);
4522 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4523 CHECK_NULL);
4524 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4525 CHECK_NULL);
4526 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4527 CHECK_NULL);
4528 names_h->obj_at_put(0, name0());
4529 names_h->obj_at_put(1, name1());
4530 names_h->obj_at_put(2, name2());
4531 break;
4532 }
4533 case JAVA_THREAD_STATE_TERMINATED : {
4534 assert(values_h->length() == 1 &&
4535 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4536 "Invalid threadStatus value");
4537 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4538 1, /* only 1 substate */
4539 CHECK_NULL);
4540 names_h = objArrayHandle(THREAD, r);
4541 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4542 names_h->obj_at_put(0, name());
4543 break;
4544 }
4545 default:
4546 // Unknown state - probably incompatible JDK version
4547 return NULL;
4548 }
4549 return (jobjectArray) JNIHandles::make_local(env, names_h());
4550 }
4551 JVM_END
4552
4553 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4554 {
4555 memset(info, 0, sizeof(info_size));
4556
4557 info->jvm_version = Abstract_VM_Version::jvm_version();
4558 info->update_version = 0; /* 0 in HotSpot Express VM */
4559 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4560
4561 // when we add a new capability in the jvm_version_info struct, we should also
4562 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4563 // counter defined in runtimeService.cpp.
4564 info->is_attachable = AttachListener::is_attach_supported();
4565 }
4566 JVM_END