1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/fieldStreams.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayKlass.hpp"
38 #include "oops/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 "utilities/copy.hpp"
62 #include "utilities/defaultStream.hpp"
63 #include "utilities/dtrace.hpp"
64 #include "utilities/events.hpp"
65 #include "utilities/histogram.hpp"
66 #include "utilities/top.hpp"
67 #include "utilities/utf8.hpp"
68 #ifdef TARGET_OS_FAMILY_linux
69 # include "jvm_linux.h"
70 #endif
71 #ifdef TARGET_OS_FAMILY_solaris
72 # include "jvm_solaris.h"
73 #endif
74 #ifdef TARGET_OS_FAMILY_windows
75 # include "jvm_windows.h"
76 #endif
77 #ifdef TARGET_OS_FAMILY_bsd
78 # include "jvm_bsd.h"
79 #endif
80
81 #include <errno.h>
82
83 #ifndef USDT2
84 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
86 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
87 #endif /* !USDT2 */
88
89 /*
90 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
91 such ctors and calls MUST NOT come between an oop declaration/init and its
92 usage because if objects are move this may cause various memory stomps, bus
93 errors and segfaults. Here is a cookbook for causing so called "naked oop
94 failures":
95
96 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
97 JVMWrapper("JVM_GetClassDeclaredFields");
98
99 // Object address to be held directly in mirror & not visible to GC
100 oop mirror = JNIHandles::resolve_non_null(ofClass);
101
102 // If this ctor can hit a safepoint, moving objects around, then
103 ComplexConstructor foo;
104
105 // Boom! mirror may point to JUNK instead of the intended object
106 (some dereference of mirror)
107
108 // Here's another call that may block for GC, making mirror stale
109 MutexLocker ml(some_lock);
110
111 // And here's an initializer that can result in a stale oop
112 // all in one step.
113 oop o = call_that_can_throw_exception(TRAPS);
114
115
116 The solution is to keep the oop declaration BELOW the ctor or function
117 call that might cause a GC, do another resolve to reassign the oop, or
118 consider use of a Handle instead of an oop so there is immunity from object
119 motion. But note that the "QUICK" entries below do not have a handlemark
120 and thus can only support use of handles passed in.
121 */
122
123 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
124 ResourceMark rm;
125 int line_number = -1;
126 const char * source_file = NULL;
127 const char * trace = "explicit";
128 klassOop caller = NULL;
129 JavaThread* jthread = JavaThread::current();
130 if (jthread->has_last_Java_frame()) {
131 vframeStream vfst(jthread);
132
133 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
134 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
135 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
136 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
137 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
138
139 methodOop last_caller = NULL;
140
141 while (!vfst.at_end()) {
142 methodOop m = vfst.method();
143 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
144 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
145 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
146 break;
147 }
148 last_caller = m;
149 vfst.next();
150 }
151 // if this is called from Class.forName0 and that is called from Class.forName,
152 // then print the caller of Class.forName. If this is Class.loadClass, then print
153 // that caller, otherwise keep quiet since this should be picked up elsewhere.
154 bool found_it = false;
155 if (!vfst.at_end() &&
156 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
157 vfst.method()->name() == vmSymbols::forName0_name()) {
158 vfst.next();
159 if (!vfst.at_end() &&
160 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
161 vfst.method()->name() == vmSymbols::forName_name()) {
162 vfst.next();
163 found_it = true;
164 }
165 } else if (last_caller != NULL &&
166 instanceKlass::cast(last_caller->method_holder())->name() ==
167 vmSymbols::java_lang_ClassLoader() &&
168 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
169 last_caller->name() == vmSymbols::loadClass_name())) {
170 found_it = true;
171 } else if (!vfst.at_end()) {
172 if (vfst.method()->is_native()) {
173 // JNI call
174 found_it = true;
175 }
176 }
177 if (found_it && !vfst.at_end()) {
178 // found the caller
179 caller = vfst.method()->method_holder();
180 line_number = vfst.method()->line_number_from_bci(vfst.bci());
181 if (line_number == -1) {
182 // show method name if it's a native method
183 trace = vfst.method()->name_and_sig_as_C_string();
184 }
185 Symbol* s = instanceKlass::cast(caller)->source_file_name();
186 if (s != NULL) {
187 source_file = s->as_C_string();
188 }
189 }
190 }
191 if (caller != NULL) {
192 if (to_class != caller) {
193 const char * from = Klass::cast(caller)->external_name();
194 const char * to = Klass::cast(to_class)->external_name();
195 // print in a single call to reduce interleaving between threads
196 if (source_file != NULL) {
197 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
198 } else {
199 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
200 }
201 }
202 }
203 }
204
205 void trace_class_resolution(klassOop to_class) {
206 EXCEPTION_MARK;
207 trace_class_resolution_impl(to_class, THREAD);
208 if (HAS_PENDING_EXCEPTION) {
209 CLEAR_PENDING_EXCEPTION;
210 }
211 }
212
213 // Wrapper to trace JVM functions
214
215 #ifdef ASSERT
216 class JVMTraceWrapper : public StackObj {
217 public:
218 JVMTraceWrapper(const char* format, ...) {
219 if (TraceJVMCalls) {
220 va_list ap;
221 va_start(ap, format);
222 tty->print("JVM ");
223 tty->vprint_cr(format, ap);
224 va_end(ap);
225 }
226 }
227 };
228
229 Histogram* JVMHistogram;
230 volatile jint JVMHistogram_lock = 0;
231
232 class JVMHistogramElement : public HistogramElement {
233 public:
234 JVMHistogramElement(const char* name);
235 };
236
237 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
238 _name = elementName;
239 uintx count = 0;
240
241 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
242 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
243 count +=1;
244 if ( (WarnOnStalledSpinLock > 0)
245 && (count % WarnOnStalledSpinLock == 0)) {
246 warning("JVMHistogram_lock seems to be stalled");
247 }
248 }
249 }
250
251 if(JVMHistogram == NULL)
252 JVMHistogram = new Histogram("JVM Call Counts",100);
253
254 JVMHistogram->add_element(this);
255 Atomic::dec(&JVMHistogram_lock);
256 }
257
258 #define JVMCountWrapper(arg) \
259 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
260 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
261
262 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
263 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
264 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
265 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
266 #else
267 #define JVMWrapper(arg1)
268 #define JVMWrapper2(arg1, arg2)
269 #define JVMWrapper3(arg1, arg2, arg3)
270 #define JVMWrapper4(arg1, arg2, arg3, arg4)
271 #endif
272
273
274 // Interface version /////////////////////////////////////////////////////////////////////
275
276
277 JVM_LEAF(jint, JVM_GetInterfaceVersion())
278 return JVM_INTERFACE_VERSION;
279 JVM_END
280
281
282 // java.lang.System //////////////////////////////////////////////////////////////////////
283
284
285 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
286 JVMWrapper("JVM_CurrentTimeMillis");
287 return os::javaTimeMillis();
288 JVM_END
289
290 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
291 JVMWrapper("JVM_NanoTime");
292 return os::javaTimeNanos();
293 JVM_END
294
295
296 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
297 jobject dst, jint dst_pos, jint length))
298 JVMWrapper("JVM_ArrayCopy");
299 // Check if we have null pointers
300 if (src == NULL || dst == NULL) {
301 THROW(vmSymbols::java_lang_NullPointerException());
302 }
303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
305 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
306 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
307 // Do copy
308 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
309 JVM_END
310
311
312 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
313 JavaValue r(T_OBJECT);
314 // public synchronized Object put(Object key, Object value);
315 HandleMark hm(THREAD);
316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
318 JavaCalls::call_virtual(&r,
319 props,
320 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
321 vmSymbols::put_name(),
322 vmSymbols::object_object_object_signature(),
323 key_str,
324 value_str,
325 THREAD);
326 }
327
328
329 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
330
331
332 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
333 JVMWrapper("JVM_InitProperties");
334 ResourceMark rm;
335
336 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
337
338 // System property list includes both user set via -D option and
339 // jvm system specific properties.
340 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
341 PUTPROP(props, p->key(), p->value());
342 }
343
344 // Convert the -XX:MaxDirectMemorySize= command line flag
345 // to the sun.nio.MaxDirectMemorySize property.
346 // Do this after setting user properties to prevent people
347 // from setting the value with a -D option, as requested.
348 {
349 char as_chars[256];
350 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
352 }
353
354 // JVM monitoring and management support
355 // Add the sun.management.compiler property for the compiler's name
356 {
357 #undef CSIZE
358 #if defined(_LP64) || defined(_WIN64)
359 #define CSIZE "64-Bit "
360 #else
361 #define CSIZE
362 #endif // 64bit
363
364 #ifdef TIERED
365 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
366 #else
367 #if defined(COMPILER1)
368 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
369 #elif defined(COMPILER2)
370 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
371 #else
372 const char* compiler_name = "";
373 #endif // compilers
374 #endif // TIERED
375
376 if (*compiler_name != '\0' &&
377 (Arguments::mode() != Arguments::_int)) {
378 PUTPROP(props, "sun.management.compiler", compiler_name);
379 }
380 }
381
382 return properties;
383 JVM_END
384
385
386 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
387
388 extern volatile jint vm_created;
389
390 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
391 if (vm_created != 0 && (code == 0)) {
392 // The VM is about to exit. We call back into Java to check whether finalizers should be run
393 Universe::run_finalizers_on_exit();
394 }
395 before_exit(thread);
396 vm_exit(code);
397 JVM_END
398
399
400 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
401 before_exit(thread);
402 vm_exit(code);
403 JVM_END
404
405
406 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
407 register_on_exit_function(func);
408 JVM_END
409
410
411 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
412 JVMWrapper("JVM_GC");
413 if (!DisableExplicitGC) {
414 Universe::heap()->collect(GCCause::_java_lang_system_gc);
415 }
416 JVM_END
417
418
419 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
420 JVMWrapper("JVM_MaxObjectInspectionAge");
421 return Universe::heap()->millis_since_last_gc();
422 JVM_END
423
424
425 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
426 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
427 JVM_END
428
429
430 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
431 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
432 JVM_END
433
434 static inline jlong convert_size_t_to_jlong(size_t val) {
435 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
436 NOT_LP64 (return (jlong)val;)
437 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
438 }
439
440 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
441 JVMWrapper("JVM_TotalMemory");
442 size_t n = Universe::heap()->capacity();
443 return convert_size_t_to_jlong(n);
444 JVM_END
445
446
447 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
448 JVMWrapper("JVM_FreeMemory");
449 CollectedHeap* ch = Universe::heap();
450 size_t n;
451 {
452 MutexLocker x(Heap_lock);
453 n = ch->capacity() - ch->used();
454 }
455 return convert_size_t_to_jlong(n);
456 JVM_END
457
458
459 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
460 JVMWrapper("JVM_MaxMemory");
461 size_t n = Universe::heap()->max_capacity();
462 return convert_size_t_to_jlong(n);
463 JVM_END
464
465
466 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
467 JVMWrapper("JVM_ActiveProcessorCount");
468 return os::active_processor_count();
469 JVM_END
470
471
472
473 // java.lang.Throwable //////////////////////////////////////////////////////
474
475
476 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
477 JVMWrapper("JVM_FillInStackTrace");
478 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
479 java_lang_Throwable::fill_in_stack_trace(exception);
480 JVM_END
481
482
483 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
484 JVMWrapper("JVM_PrintStackTrace");
485 // Note: This is no longer used in Merlin, but we still support it for compatibility.
486 oop exception = JNIHandles::resolve_non_null(receiver);
487 oop stream = JNIHandles::resolve_non_null(printable);
488 java_lang_Throwable::print_stack_trace(exception, stream);
489 JVM_END
490
491
492 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
493 JVMWrapper("JVM_GetStackTraceDepth");
494 oop exception = JNIHandles::resolve(throwable);
495 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
496 JVM_END
497
498
499 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
500 JVMWrapper("JVM_GetStackTraceElement");
501 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
502 oop exception = JNIHandles::resolve(throwable);
503 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
504 return JNIHandles::make_local(env, element);
505 JVM_END
506
507
508 // java.lang.Object ///////////////////////////////////////////////
509
510
511 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
512 JVMWrapper("JVM_IHashCode");
513 // as implemented in the classic virtual machine; return 0 if object is NULL
514 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
515 JVM_END
516
517
518 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
519 JVMWrapper("JVM_MonitorWait");
520 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
521 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
522 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
523 if (JvmtiExport::should_post_monitor_wait()) {
524 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
525 }
526 ObjectSynchronizer::wait(obj, ms, CHECK);
527 JVM_END
528
529
530 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
531 JVMWrapper("JVM_MonitorNotify");
532 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
533 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
534 ObjectSynchronizer::notify(obj, CHECK);
535 JVM_END
536
537
538 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
539 JVMWrapper("JVM_MonitorNotifyAll");
540 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
541 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
542 ObjectSynchronizer::notifyall(obj, CHECK);
543 JVM_END
544
545
546 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
547 JVMWrapper("JVM_Clone");
548 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
549 const KlassHandle klass (THREAD, obj->klass());
550 JvmtiVMObjectAllocEventCollector oam;
551
552 #ifdef ASSERT
553 // Just checking that the cloneable flag is set correct
554 if (obj->is_javaArray()) {
555 guarantee(klass->is_cloneable(), "all arrays are cloneable");
556 } else {
557 guarantee(obj->is_instance(), "should be instanceOop");
558 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
559 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
560 }
561 #endif
562
563 // Check if class of obj supports the Cloneable interface.
564 // All arrays are considered to be cloneable (See JLS 20.1.5)
565 if (!klass->is_cloneable()) {
566 ResourceMark rm(THREAD);
567 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
568 }
569
570 // Make shallow object copy
571 const int size = obj->size();
572 oop new_obj = NULL;
573 if (obj->is_javaArray()) {
574 const int length = ((arrayOop)obj())->length();
575 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
576 } else {
577 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
578 }
579 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
580 // is modifying a reference field in the clonee, a non-oop-atomic copy might
581 // be suspended in the middle of copying the pointer and end up with parts
582 // of two different pointers in the field. Subsequent dereferences will crash.
583 // 4846409: an oop-copy of objects with long or double fields or arrays of same
584 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
585 // of oops. We know objects are aligned on a minimum of an jlong boundary.
586 // The same is true of StubRoutines::object_copy and the various oop_copy
587 // variants, and of the code generated by the inline_native_clone intrinsic.
588 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
589 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
590 (size_t)align_object_size(size) / HeapWordsPerLong);
591 // Clear the header
592 new_obj->init_mark();
593
594 // Store check (mark entire object and let gc sort it out)
595 BarrierSet* bs = Universe::heap()->barrier_set();
596 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
597 bs->write_region(MemRegion((HeapWord*)new_obj, size));
598
599 // Caution: this involves a java upcall, so the clone should be
600 // "gc-robust" by this stage.
601 if (klass->has_finalizer()) {
602 assert(obj->is_instance(), "should be instanceOop");
603 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
604 }
605
606 return JNIHandles::make_local(env, oop(new_obj));
607 JVM_END
608
609 // java.lang.Compiler ////////////////////////////////////////////////////
610
611 // The initial cuts of the HotSpot VM will not support JITs, and all existing
612 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
613 // functions are all silently ignored unless JVM warnings are printed.
614
615 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
616 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
617 JVM_END
618
619
620 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
621 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
622 return JNI_FALSE;
623 JVM_END
624
625
626 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
627 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
628 return JNI_FALSE;
629 JVM_END
630
631
632 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
633 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
634 return JNI_FALSE;
635 JVM_END
636
637
638 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
639 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
640 return NULL;
641 JVM_END
642
643
644 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
645 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
646 JVM_END
647
648
649 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
650 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
651 JVM_END
652
653
654
655 // Error message support //////////////////////////////////////////////////////
656
657 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
658 JVMWrapper("JVM_GetLastErrorString");
659 return (jint)os::lasterror(buf, len);
660 JVM_END
661
662
663 // java.io.File ///////////////////////////////////////////////////////////////
664
665 JVM_LEAF(char*, JVM_NativePath(char* path))
666 JVMWrapper2("JVM_NativePath (%s)", path);
667 return os::native_path(path);
668 JVM_END
669
670
671 // Misc. class handling ///////////////////////////////////////////////////////////
672
673
674 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
675 JVMWrapper("JVM_GetCallerClass");
676 klassOop k = thread->security_get_caller_class(depth);
677 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
678 JVM_END
679
680
681 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
682 JVMWrapper("JVM_FindPrimitiveClass");
683 oop mirror = NULL;
684 BasicType t = name2type(utf);
685 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
686 mirror = Universe::java_mirror(t);
687 }
688 if (mirror == NULL) {
689 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
690 } else {
691 return (jclass) JNIHandles::make_local(env, mirror);
692 }
693 JVM_END
694
695
696 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
697 JVMWrapper("JVM_ResolveClass");
698 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
699 JVM_END
700
701
702 // Returns a class loaded by the bootstrap class loader; or null
703 // if not found. ClassNotFoundException is not thrown.
704 //
705 // Rationale behind JVM_FindClassFromBootLoader
706 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
707 // b> because of (a) java.dll has a direct dependecy on the unexported
708 // private symbol "_JVM_FindClassFromClassLoader@20".
709 // c> the launcher cannot use the private symbol as it dynamically opens
710 // the entry point, so if something changes, the launcher will fail
711 // unexpectedly at runtime, it is safest for the launcher to dlopen a
712 // stable exported interface.
713 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
714 // signature to change from _JVM_FindClassFromClassLoader@20 to
715 // JVM_FindClassFromClassLoader and will not be backward compatible
716 // with older JDKs.
717 // Thus a public/stable exported entry point is the right solution,
718 // public here means public in linker semantics, and is exported only
719 // to the JDK, and is not intended to be a public API.
720
721 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
722 const char* name))
723 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
724
725 // Java libraries should ensure that name is never null...
726 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
727 // It's impossible to create this class; the name cannot fit
728 // into the constant pool.
729 return NULL;
730 }
731
732 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
733 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
734 if (k == NULL) {
735 return NULL;
736 }
737
738 if (TraceClassResolution) {
739 trace_class_resolution(k);
740 }
741 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
742 JVM_END
743
744 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
745 jboolean init, jobject loader,
746 jboolean throwError))
747 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
748 throwError ? "error" : "exception");
749 // Java libraries should ensure that name is never null...
750 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
751 // It's impossible to create this class; the name cannot fit
752 // into the constant pool.
753 if (throwError) {
754 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
755 } else {
756 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
757 }
758 }
759 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
760 Handle h_loader(THREAD, JNIHandles::resolve(loader));
761 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
762 Handle(), throwError, THREAD);
763
764 if (TraceClassResolution && result != NULL) {
765 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
766 }
767 return result;
768 JVM_END
769
770
771 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
772 jboolean init, jclass from))
773 JVMWrapper2("JVM_FindClassFromClass %s", name);
774 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
775 // It's impossible to create this class; the name cannot fit
776 // into the constant pool.
777 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
778 }
779 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
780 oop from_class_oop = JNIHandles::resolve(from);
781 klassOop from_class = (from_class_oop == NULL)
782 ? (klassOop)NULL
783 : java_lang_Class::as_klassOop(from_class_oop);
784 oop class_loader = NULL;
785 oop protection_domain = NULL;
786 if (from_class != NULL) {
787 class_loader = Klass::cast(from_class)->class_loader();
788 protection_domain = Klass::cast(from_class)->protection_domain();
789 }
790 Handle h_loader(THREAD, class_loader);
791 Handle h_prot (THREAD, protection_domain);
792 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
793 h_prot, true, thread);
794
795 if (TraceClassResolution && result != NULL) {
796 // this function is generally only used for class loading during verification.
797 ResourceMark rm;
798 oop from_mirror = JNIHandles::resolve_non_null(from);
799 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
800 const char * from_name = Klass::cast(from_class)->external_name();
801
802 oop mirror = JNIHandles::resolve_non_null(result);
803 klassOop to_class = java_lang_Class::as_klassOop(mirror);
804 const char * to = Klass::cast(to_class)->external_name();
805 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
806 }
807
808 return result;
809 JVM_END
810
811 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
812 if (loader.is_null()) {
813 return;
814 }
815
816 // check whether the current caller thread holds the lock or not.
817 // If not, increment the corresponding counter
818 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
819 ObjectSynchronizer::owner_self) {
820 counter->inc();
821 }
822 }
823
824 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
825 // and JVM_DefineClassWithSourceCond()
826 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
827 jobject loader, const jbyte *buf,
828 jsize len, jobject pd, const char *source,
829 jboolean verify, TRAPS) {
830 if (source == NULL) source = "__JVM_DefineClass__";
831
832 assert(THREAD->is_Java_thread(), "must be a JavaThread");
833 JavaThread* jt = (JavaThread*) THREAD;
834
835 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
836 ClassLoader::perf_define_appclass_selftime(),
837 ClassLoader::perf_define_appclasses(),
838 jt->get_thread_stat()->perf_recursion_counts_addr(),
839 jt->get_thread_stat()->perf_timers_addr(),
840 PerfClassTraceTime::DEFINE_CLASS);
841
842 if (UsePerfData) {
843 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
844 }
845
846 // Since exceptions can be thrown, class initialization can take place
847 // if name is NULL no check for class name in .class stream has to be made.
848 TempNewSymbol class_name = NULL;
849 if (name != NULL) {
850 const int str_len = (int)strlen(name);
851 if (str_len > Symbol::max_length()) {
852 // It's impossible to create this class; the name cannot fit
853 // into the constant pool.
854 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
855 }
856 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
857 }
858
859 ResourceMark rm(THREAD);
860 ClassFileStream st((u1*) buf, len, (char *)source);
861 Handle class_loader (THREAD, JNIHandles::resolve(loader));
862 if (UsePerfData) {
863 is_lock_held_by_thread(class_loader,
864 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
865 THREAD);
866 }
867 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
868 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
869 protection_domain, &st,
870 verify != 0,
871 CHECK_NULL);
872
873 if (TraceClassResolution && k != NULL) {
874 trace_class_resolution(k);
875 }
876
877 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
878 }
879
880
881 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
882 JVMWrapper2("JVM_DefineClass %s", name);
883
884 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
885 JVM_END
886
887
888 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
889 JVMWrapper2("JVM_DefineClassWithSource %s", name);
890
891 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
892 JVM_END
893
894 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
895 jobject loader, const jbyte *buf,
896 jsize len, jobject pd,
897 const char *source, jboolean verify))
898 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
899
900 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
901 JVM_END
902
903 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
904 JVMWrapper("JVM_FindLoadedClass");
905 ResourceMark rm(THREAD);
906
907 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
908 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
909
910 const char* str = java_lang_String::as_utf8_string(string());
911 // Sanity check, don't expect null
912 if (str == NULL) return NULL;
913
914 const int str_len = (int)strlen(str);
915 if (str_len > Symbol::max_length()) {
916 // It's impossible to create this class; the name cannot fit
917 // into the constant pool.
918 return NULL;
919 }
920 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
921
922 // Security Note:
923 // The Java level wrapper will perform the necessary security check allowing
924 // us to pass the NULL as the initiating class loader.
925 Handle h_loader(THREAD, JNIHandles::resolve(loader));
926 if (UsePerfData) {
927 is_lock_held_by_thread(h_loader,
928 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
929 THREAD);
930 }
931
932 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
933 h_loader,
934 Handle(),
935 CHECK_NULL);
936
937 return (k == NULL) ? NULL :
938 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
939 JVM_END
940
941
942 // Reflection support //////////////////////////////////////////////////////////////////////////////
943
944 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
945 assert (cls != NULL, "illegal class");
946 JVMWrapper("JVM_GetClassName");
947 JvmtiVMObjectAllocEventCollector oam;
948 ResourceMark rm(THREAD);
949 const char* name;
950 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
951 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
952 } else {
953 // Consider caching interned string in Klass
954 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
955 assert(k->is_klass(), "just checking");
956 name = Klass::cast(k)->external_name();
957 }
958 oop result = StringTable::intern((char*) name, CHECK_NULL);
959 return (jstring) JNIHandles::make_local(env, result);
960 JVM_END
961
962
963 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
964 JVMWrapper("JVM_GetClassInterfaces");
965 JvmtiVMObjectAllocEventCollector oam;
966 oop mirror = JNIHandles::resolve_non_null(cls);
967
968 // Special handling for primitive objects
969 if (java_lang_Class::is_primitive(mirror)) {
970 // Primitive objects does not have any interfaces
971 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
972 return (jobjectArray) JNIHandles::make_local(env, r);
973 }
974
975 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
976 // Figure size of result array
977 int size;
978 if (klass->oop_is_instance()) {
979 size = instanceKlass::cast(klass())->local_interfaces()->length();
980 } else {
981 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
982 size = 2;
983 }
984
985 // Allocate result array
986 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
987 objArrayHandle result (THREAD, r);
988 // Fill in result
989 if (klass->oop_is_instance()) {
990 // Regular instance klass, fill in all local interfaces
991 for (int index = 0; index < size; index++) {
992 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
993 result->obj_at_put(index, Klass::cast(k)->java_mirror());
994 }
995 } else {
996 // All arrays implement java.lang.Cloneable and java.io.Serializable
997 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
998 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
999 }
1000 return (jobjectArray) JNIHandles::make_local(env, result());
1001 JVM_END
1002
1003
1004 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1005 JVMWrapper("JVM_GetClassLoader");
1006 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1007 return NULL;
1008 }
1009 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1010 oop loader = Klass::cast(k)->class_loader();
1011 return JNIHandles::make_local(env, loader);
1012 JVM_END
1013
1014
1015 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1016 JVMWrapper("JVM_IsInterface");
1017 oop mirror = JNIHandles::resolve_non_null(cls);
1018 if (java_lang_Class::is_primitive(mirror)) {
1019 return JNI_FALSE;
1020 }
1021 klassOop k = java_lang_Class::as_klassOop(mirror);
1022 jboolean result = Klass::cast(k)->is_interface();
1023 assert(!result || Klass::cast(k)->oop_is_instance(),
1024 "all interfaces are instance types");
1025 // The compiler intrinsic for isInterface tests the
1026 // Klass::_access_flags bits in the same way.
1027 return result;
1028 JVM_END
1029
1030
1031 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1032 JVMWrapper("JVM_GetClassSigners");
1033 JvmtiVMObjectAllocEventCollector oam;
1034 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1035 // There are no signers for primitive types
1036 return NULL;
1037 }
1038
1039 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1040 objArrayOop signers = NULL;
1041 if (Klass::cast(k)->oop_is_instance()) {
1042 signers = instanceKlass::cast(k)->signers();
1043 }
1044
1045 // If there are no signers set in the class, or if the class
1046 // is an array, return NULL.
1047 if (signers == NULL) return NULL;
1048
1049 // copy of the signers array
1050 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1051 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1052 for (int index = 0; index < signers->length(); index++) {
1053 signers_copy->obj_at_put(index, signers->obj_at(index));
1054 }
1055
1056 // return the copy
1057 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1058 JVM_END
1059
1060
1061 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1062 JVMWrapper("JVM_SetClassSigners");
1063 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1064 // This call is ignored for primitive types and arrays.
1065 // Signers are only set once, ClassLoader.java, and thus shouldn't
1066 // be called with an array. Only the bootstrap loader creates arrays.
1067 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1068 if (Klass::cast(k)->oop_is_instance()) {
1069 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1070 }
1071 }
1072 JVM_END
1073
1074
1075 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1076 JVMWrapper("JVM_GetProtectionDomain");
1077 if (JNIHandles::resolve(cls) == NULL) {
1078 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1079 }
1080
1081 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1082 // Primitive types does not have a protection domain.
1083 return NULL;
1084 }
1085
1086 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1087 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1088 JVM_END
1089
1090
1091 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1092 // still defined in core libraries as of 1.5.
1093 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1094 JVMWrapper("JVM_SetProtectionDomain");
1095 if (JNIHandles::resolve(cls) == NULL) {
1096 THROW(vmSymbols::java_lang_NullPointerException());
1097 }
1098 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1099 // Call is ignored for primitive types
1100 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1101
1102 // cls won't be an array, as this called only from ClassLoader.defineClass
1103 if (Klass::cast(k)->oop_is_instance()) {
1104 oop pd = JNIHandles::resolve(protection_domain);
1105 assert(pd == NULL || pd->is_oop(), "just checking");
1106 instanceKlass::cast(k)->set_protection_domain(pd);
1107 }
1108 }
1109 JVM_END
1110
1111
1112 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1113 JVMWrapper("JVM_DoPrivileged");
1114
1115 if (action == NULL) {
1116 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1117 }
1118
1119 // Stack allocated list of privileged stack elements
1120 PrivilegedElement pi;
1121
1122 // Check that action object understands "Object run()"
1123 Handle object (THREAD, JNIHandles::resolve(action));
1124
1125 // get run() method
1126 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1127 vmSymbols::run_method_name(),
1128 vmSymbols::void_object_signature());
1129 methodHandle m (THREAD, m_oop);
1130 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1131 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1132 }
1133
1134 // Compute the frame initiating the do privileged operation and setup the privileged stack
1135 vframeStream vfst(thread);
1136 vfst.security_get_caller_frame(1);
1137
1138 if (!vfst.at_end()) {
1139 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1140 thread->set_privileged_stack_top(&pi);
1141 }
1142
1143
1144 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1145 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1146 Handle pending_exception;
1147 JavaValue result(T_OBJECT);
1148 JavaCallArguments args(object);
1149 JavaCalls::call(&result, m, &args, THREAD);
1150
1151 // done with action, remove ourselves from the list
1152 if (!vfst.at_end()) {
1153 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1154 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1155 }
1156
1157 if (HAS_PENDING_EXCEPTION) {
1158 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1159 CLEAR_PENDING_EXCEPTION;
1160
1161 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1162 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1163 // Throw a java.security.PrivilegedActionException(Exception e) exception
1164 JavaCallArguments args(pending_exception);
1165 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1166 vmSymbols::exception_void_signature(),
1167 &args);
1168 }
1169 }
1170
1171 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1172 return JNIHandles::make_local(env, (oop) result.get_jobject());
1173 JVM_END
1174
1175
1176 // Returns the inherited_access_control_context field of the running thread.
1177 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1178 JVMWrapper("JVM_GetInheritedAccessControlContext");
1179 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1180 return JNIHandles::make_local(env, result);
1181 JVM_END
1182
1183 class RegisterArrayForGC {
1184 private:
1185 JavaThread *_thread;
1186 public:
1187 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1188 _thread = thread;
1189 _thread->register_array_for_gc(array);
1190 }
1191
1192 ~RegisterArrayForGC() {
1193 _thread->register_array_for_gc(NULL);
1194 }
1195 };
1196
1197
1198 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1199 JVMWrapper("JVM_GetStackAccessControlContext");
1200 if (!UsePrivilegedStack) return NULL;
1201
1202 ResourceMark rm(THREAD);
1203 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1204 JvmtiVMObjectAllocEventCollector oam;
1205
1206 // count the protection domains on the execution stack. We collapse
1207 // duplicate consecutive protection domains into a single one, as
1208 // well as stopping when we hit a privileged frame.
1209
1210 // Use vframeStream to iterate through Java frames
1211 vframeStream vfst(thread);
1212
1213 oop previous_protection_domain = NULL;
1214 Handle privileged_context(thread, NULL);
1215 bool is_privileged = false;
1216 oop protection_domain = NULL;
1217
1218 for(; !vfst.at_end(); vfst.next()) {
1219 // get method of frame
1220 methodOop method = vfst.method();
1221 intptr_t* frame_id = vfst.frame_id();
1222
1223 // check the privileged frames to see if we have a match
1224 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1225 // this frame is privileged
1226 is_privileged = true;
1227 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1228 protection_domain = thread->privileged_stack_top()->protection_domain();
1229 } else {
1230 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1231 }
1232
1233 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1234 local_array->push(protection_domain);
1235 previous_protection_domain = protection_domain;
1236 }
1237
1238 if (is_privileged) break;
1239 }
1240
1241
1242 // either all the domains on the stack were system domains, or
1243 // we had a privileged system domain
1244 if (local_array->is_empty()) {
1245 if (is_privileged && privileged_context.is_null()) return NULL;
1246
1247 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1248 return JNIHandles::make_local(env, result);
1249 }
1250
1251 // the resource area must be registered in case of a gc
1252 RegisterArrayForGC ragc(thread, local_array);
1253 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1254 local_array->length(), CHECK_NULL);
1255 objArrayHandle h_context(thread, context);
1256 for (int index = 0; index < local_array->length(); index++) {
1257 h_context->obj_at_put(index, local_array->at(index));
1258 }
1259
1260 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1261
1262 return JNIHandles::make_local(env, result);
1263 JVM_END
1264
1265
1266 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1267 JVMWrapper("JVM_IsArrayClass");
1268 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1269 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1270 JVM_END
1271
1272
1273 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1274 JVMWrapper("JVM_IsPrimitiveClass");
1275 oop mirror = JNIHandles::resolve_non_null(cls);
1276 return (jboolean) java_lang_Class::is_primitive(mirror);
1277 JVM_END
1278
1279
1280 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1281 JVMWrapper("JVM_GetComponentType");
1282 oop mirror = JNIHandles::resolve_non_null(cls);
1283 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1284 return (jclass) JNIHandles::make_local(env, result);
1285 JVM_END
1286
1287
1288 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1289 JVMWrapper("JVM_GetClassModifiers");
1290 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1291 // Primitive type
1292 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1293 }
1294
1295 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1296 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1297 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1298 return k->modifier_flags();
1299 JVM_END
1300
1301
1302 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1303
1304 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1305 JvmtiVMObjectAllocEventCollector oam;
1306 // ofClass is a reference to a java_lang_Class object. The mirror object
1307 // of an instanceKlass
1308
1309 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1310 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1311 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1312 return (jobjectArray)JNIHandles::make_local(env, result);
1313 }
1314
1315 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1316 InnerClassesIterator iter(k);
1317
1318 if (iter.length() == 0) {
1319 // Neither an inner nor outer class
1320 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1321 return (jobjectArray)JNIHandles::make_local(env, result);
1322 }
1323
1324 // find inner class info
1325 constantPoolHandle cp(thread, k->constants());
1326 int length = iter.length();
1327
1328 // Allocate temp. result array
1329 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1330 objArrayHandle result (THREAD, r);
1331 int members = 0;
1332
1333 for (; !iter.done(); iter.next()) {
1334 int ioff = iter.inner_class_info_index();
1335 int ooff = iter.outer_class_info_index();
1336
1337 if (ioff != 0 && ooff != 0) {
1338 // Check to see if the name matches the class we're looking for
1339 // before attempting to find the class.
1340 if (cp->klass_name_at_matches(k, ooff)) {
1341 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1342 if (outer_klass == k()) {
1343 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1344 instanceKlassHandle inner_klass (THREAD, ik);
1345
1346 // Throws an exception if outer klass has not declared k as
1347 // an inner klass
1348 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1349
1350 result->obj_at_put(members, inner_klass->java_mirror());
1351 members++;
1352 }
1353 }
1354 }
1355 }
1356
1357 if (members != length) {
1358 // Return array of right length
1359 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1360 for(int i = 0; i < members; i++) {
1361 res->obj_at_put(i, result->obj_at(i));
1362 }
1363 return (jobjectArray)JNIHandles::make_local(env, res);
1364 }
1365
1366 return (jobjectArray)JNIHandles::make_local(env, result());
1367 JVM_END
1368
1369
1370 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1371 {
1372 // ofClass is a reference to a java_lang_Class object.
1373 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1374 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1375 return NULL;
1376 }
1377
1378 bool inner_is_member = false;
1379 klassOop outer_klass
1380 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1381 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1382 if (outer_klass == NULL) return NULL; // already a top-level class
1383 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1384 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1385 }
1386 JVM_END
1387
1388 // should be in instanceKlass.cpp, but is here for historical reasons
1389 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1390 bool* inner_is_member,
1391 TRAPS) {
1392 Thread* thread = THREAD;
1393 InnerClassesIterator iter(k);
1394 if (iter.length() == 0) {
1395 // No inner class info => no declaring class
1396 return NULL;
1397 }
1398
1399 constantPoolHandle i_cp(thread, k->constants());
1400
1401 bool found = false;
1402 klassOop ok;
1403 instanceKlassHandle outer_klass;
1404 *inner_is_member = false;
1405
1406 // Find inner_klass attribute
1407 for (; !iter.done() && !found; iter.next()) {
1408 int ioff = iter.inner_class_info_index();
1409 int ooff = iter.outer_class_info_index();
1410 int noff = iter.inner_name_index();
1411 if (ioff != 0) {
1412 // Check to see if the name matches the class we're looking for
1413 // before attempting to find the class.
1414 if (i_cp->klass_name_at_matches(k, ioff)) {
1415 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1416 found = (k() == inner_klass);
1417 if (found && ooff != 0) {
1418 ok = i_cp->klass_at(ooff, CHECK_NULL);
1419 outer_klass = instanceKlassHandle(thread, ok);
1420 *inner_is_member = true;
1421 }
1422 }
1423 }
1424 }
1425
1426 if (found && outer_klass.is_null()) {
1427 // It may be anonymous; try for that.
1428 int encl_method_class_idx = k->enclosing_method_class_index();
1429 if (encl_method_class_idx != 0) {
1430 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1431 outer_klass = instanceKlassHandle(thread, ok);
1432 *inner_is_member = false;
1433 }
1434 }
1435
1436 // If no inner class attribute found for this class.
1437 if (outer_klass.is_null()) return NULL;
1438
1439 // Throws an exception if outer klass has not declared k as an inner klass
1440 // We need evidence that each klass knows about the other, or else
1441 // the system could allow a spoof of an inner class to gain access rights.
1442 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1443 return outer_klass();
1444 }
1445
1446 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1447 assert (cls != NULL, "illegal class");
1448 JVMWrapper("JVM_GetClassSignature");
1449 JvmtiVMObjectAllocEventCollector oam;
1450 ResourceMark rm(THREAD);
1451 // Return null for arrays and primatives
1452 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1453 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1454 if (Klass::cast(k)->oop_is_instance()) {
1455 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1456 if (sym == NULL) return NULL;
1457 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1458 return (jstring) JNIHandles::make_local(env, str());
1459 }
1460 }
1461 return NULL;
1462 JVM_END
1463
1464
1465 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1466 assert (cls != NULL, "illegal class");
1467 JVMWrapper("JVM_GetClassAnnotations");
1468 ResourceMark rm(THREAD);
1469 // Return null for arrays and primitives
1470 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1471 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1472 if (Klass::cast(k)->oop_is_instance()) {
1473 return (jbyteArray) JNIHandles::make_local(env,
1474 instanceKlass::cast(k)->class_annotations());
1475 }
1476 }
1477 return NULL;
1478 JVM_END
1479
1480
1481 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1482 assert(field != NULL, "illegal field");
1483 JVMWrapper("JVM_GetFieldAnnotations");
1484
1485 // some of this code was adapted from from jni_FromReflectedField
1486
1487 // field is a handle to a java.lang.reflect.Field object
1488 oop reflected = JNIHandles::resolve_non_null(field);
1489 oop mirror = java_lang_reflect_Field::clazz(reflected);
1490 klassOop k = java_lang_Class::as_klassOop(mirror);
1491 int slot = java_lang_reflect_Field::slot(reflected);
1492 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1493
1494 fieldDescriptor fd;
1495 KlassHandle kh(THREAD, k);
1496 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1497
1498 if (modifiers & JVM_ACC_STATIC) {
1499 // for static fields we only look in the current class
1500 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1501 true, &fd)) {
1502 assert(false, "cannot find static field");
1503 return NULL; // robustness
1504 }
1505 } else {
1506 // for instance fields we start with the current class and work
1507 // our way up through the superclass chain
1508 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1509 &fd)) {
1510 assert(false, "cannot find instance field");
1511 return NULL; // robustness
1512 }
1513 }
1514
1515 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1516 JVM_END
1517
1518
1519 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1520 // some of this code was adapted from from jni_FromReflectedMethod
1521
1522 oop reflected = JNIHandles::resolve_non_null(method);
1523 oop mirror = NULL;
1524 int slot = 0;
1525
1526 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1527 mirror = java_lang_reflect_Constructor::clazz(reflected);
1528 slot = java_lang_reflect_Constructor::slot(reflected);
1529 } else {
1530 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1531 "wrong type");
1532 mirror = java_lang_reflect_Method::clazz(reflected);
1533 slot = java_lang_reflect_Method::slot(reflected);
1534 }
1535 klassOop k = java_lang_Class::as_klassOop(mirror);
1536
1537 KlassHandle kh(THREAD, k);
1538 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1539 if (m == NULL) {
1540 assert(false, "cannot find method");
1541 return NULL; // robustness
1542 }
1543
1544 return m;
1545 }
1546
1547
1548 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1549 JVMWrapper("JVM_GetMethodAnnotations");
1550
1551 // method is a handle to a java.lang.reflect.Method object
1552 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1553 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1554 JVM_END
1555
1556
1557 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1558 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1559
1560 // method is a handle to a java.lang.reflect.Method object
1561 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1562 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1563 JVM_END
1564
1565
1566 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1567 JVMWrapper("JVM_GetMethodParameterAnnotations");
1568
1569 // method is a handle to a java.lang.reflect.Method object
1570 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1571 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1572 JVM_END
1573
1574
1575 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1576
1577 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1578 {
1579 JVMWrapper("JVM_GetClassDeclaredFields");
1580 JvmtiVMObjectAllocEventCollector oam;
1581
1582 // Exclude primitive types and array types
1583 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1584 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1585 // Return empty array
1586 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1587 return (jobjectArray) JNIHandles::make_local(env, res);
1588 }
1589
1590 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1591 constantPoolHandle cp(THREAD, k->constants());
1592
1593 // Ensure class is linked
1594 k->link_class(CHECK_NULL);
1595
1596 // 4496456 We need to filter out java.lang.Throwable.backtrace
1597 bool skip_backtrace = false;
1598
1599 // Allocate result
1600 int num_fields;
1601
1602 if (publicOnly) {
1603 num_fields = 0;
1604 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1605 if (fs.access_flags().is_public()) ++num_fields;
1606 }
1607 } else {
1608 num_fields = k->java_fields_count();
1609
1610 if (k() == SystemDictionary::Throwable_klass()) {
1611 num_fields--;
1612 skip_backtrace = true;
1613 }
1614 }
1615
1616 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1617 objArrayHandle result (THREAD, r);
1618
1619 int out_idx = 0;
1620 fieldDescriptor fd;
1621 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1622 if (skip_backtrace) {
1623 // 4496456 skip java.lang.Throwable.backtrace
1624 int offset = fs.offset();
1625 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1626 }
1627
1628 if (!publicOnly || fs.access_flags().is_public()) {
1629 fd.initialize(k(), fs.index());
1630 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1631 result->obj_at_put(out_idx, field);
1632 ++out_idx;
1633 }
1634 }
1635 assert(out_idx == num_fields, "just checking");
1636 return (jobjectArray) JNIHandles::make_local(env, result());
1637 }
1638 JVM_END
1639
1640 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1641 {
1642 JVMWrapper("JVM_GetClassDeclaredMethods");
1643 JvmtiVMObjectAllocEventCollector oam;
1644
1645 // Exclude primitive types and array types
1646 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1647 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1648 // Return empty array
1649 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1650 return (jobjectArray) JNIHandles::make_local(env, res);
1651 }
1652
1653 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1654
1655 // Ensure class is linked
1656 k->link_class(CHECK_NULL);
1657
1658 objArrayHandle methods (THREAD, k->methods());
1659 int methods_length = methods->length();
1660 int num_methods = 0;
1661
1662 int i;
1663 for (i = 0; i < methods_length; i++) {
1664 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1665 if (!method->is_initializer()) {
1666 if (!publicOnly || method->is_public()) {
1667 ++num_methods;
1668 }
1669 }
1670 }
1671
1672 // Allocate result
1673 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1674 objArrayHandle result (THREAD, r);
1675
1676 int out_idx = 0;
1677 for (i = 0; i < methods_length; i++) {
1678 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1679 if (!method->is_initializer()) {
1680 if (!publicOnly || method->is_public()) {
1681 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1682 result->obj_at_put(out_idx, m);
1683 ++out_idx;
1684 }
1685 }
1686 }
1687 assert(out_idx == num_methods, "just checking");
1688 return (jobjectArray) JNIHandles::make_local(env, result());
1689 }
1690 JVM_END
1691
1692 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1693 {
1694 JVMWrapper("JVM_GetClassDeclaredConstructors");
1695 JvmtiVMObjectAllocEventCollector oam;
1696
1697 // Exclude primitive types and array types
1698 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1699 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1700 // Return empty array
1701 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1702 return (jobjectArray) JNIHandles::make_local(env, res);
1703 }
1704
1705 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1706
1707 // Ensure class is linked
1708 k->link_class(CHECK_NULL);
1709
1710 objArrayHandle methods (THREAD, k->methods());
1711 int methods_length = methods->length();
1712 int num_constructors = 0;
1713
1714 int i;
1715 for (i = 0; i < methods_length; i++) {
1716 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1717 if (method->is_initializer() && !method->is_static()) {
1718 if (!publicOnly || method->is_public()) {
1719 ++num_constructors;
1720 }
1721 }
1722 }
1723
1724 // Allocate result
1725 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1726 objArrayHandle result(THREAD, r);
1727
1728 int out_idx = 0;
1729 for (i = 0; i < methods_length; i++) {
1730 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1731 if (method->is_initializer() && !method->is_static()) {
1732 if (!publicOnly || method->is_public()) {
1733 oop m = Reflection::new_constructor(method, CHECK_NULL);
1734 result->obj_at_put(out_idx, m);
1735 ++out_idx;
1736 }
1737 }
1738 }
1739 assert(out_idx == num_constructors, "just checking");
1740 return (jobjectArray) JNIHandles::make_local(env, result());
1741 }
1742 JVM_END
1743
1744 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1745 {
1746 JVMWrapper("JVM_GetClassAccessFlags");
1747 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1748 // Primitive type
1749 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1750 }
1751
1752 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1753 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1754 }
1755 JVM_END
1756
1757
1758 // Constant pool access //////////////////////////////////////////////////////////
1759
1760 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1761 {
1762 JVMWrapper("JVM_GetClassConstantPool");
1763 JvmtiVMObjectAllocEventCollector oam;
1764
1765 // Return null for primitives and arrays
1766 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1767 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1768 if (Klass::cast(k)->oop_is_instance()) {
1769 instanceKlassHandle k_h(THREAD, k);
1770 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1771 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1772 return JNIHandles::make_local(jcp());
1773 }
1774 }
1775 return NULL;
1776 }
1777 JVM_END
1778
1779
1780 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1781 {
1782 JVMWrapper("JVM_ConstantPoolGetSize");
1783 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1784 return cp->length();
1785 }
1786 JVM_END
1787
1788
1789 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1790 if (!cp->is_within_bounds(index)) {
1791 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1792 }
1793 }
1794
1795
1796 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1797 {
1798 JVMWrapper("JVM_ConstantPoolGetClassAt");
1799 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1800 bounds_check(cp, index, CHECK_NULL);
1801 constantTag tag = cp->tag_at(index);
1802 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1803 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1804 }
1805 klassOop k = cp->klass_at(index, CHECK_NULL);
1806 return (jclass) JNIHandles::make_local(k->java_mirror());
1807 }
1808 JVM_END
1809
1810
1811 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1812 {
1813 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1814 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1815 bounds_check(cp, index, CHECK_NULL);
1816 constantTag tag = cp->tag_at(index);
1817 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1818 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1819 }
1820 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1821 if (k == NULL) return NULL;
1822 return (jclass) JNIHandles::make_local(k->java_mirror());
1823 }
1824 JVM_END
1825
1826 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1827 constantTag tag = cp->tag_at(index);
1828 if (!tag.is_method() && !tag.is_interface_method()) {
1829 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1830 }
1831 int klass_ref = cp->uncached_klass_ref_index_at(index);
1832 klassOop k_o;
1833 if (force_resolution) {
1834 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1835 } else {
1836 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1837 if (k_o == NULL) return NULL;
1838 }
1839 instanceKlassHandle k(THREAD, k_o);
1840 Symbol* name = cp->uncached_name_ref_at(index);
1841 Symbol* sig = cp->uncached_signature_ref_at(index);
1842 methodHandle m (THREAD, k->find_method(name, sig));
1843 if (m.is_null()) {
1844 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1845 }
1846 oop method;
1847 if (!m->is_initializer() || m->is_static()) {
1848 method = Reflection::new_method(m, true, true, CHECK_NULL);
1849 } else {
1850 method = Reflection::new_constructor(m, CHECK_NULL);
1851 }
1852 return JNIHandles::make_local(method);
1853 }
1854
1855 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1856 {
1857 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1858 JvmtiVMObjectAllocEventCollector oam;
1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1860 bounds_check(cp, index, CHECK_NULL);
1861 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1862 return res;
1863 }
1864 JVM_END
1865
1866 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1867 {
1868 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1869 JvmtiVMObjectAllocEventCollector oam;
1870 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1871 bounds_check(cp, index, CHECK_NULL);
1872 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1873 return res;
1874 }
1875 JVM_END
1876
1877 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1878 constantTag tag = cp->tag_at(index);
1879 if (!tag.is_field()) {
1880 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1881 }
1882 int klass_ref = cp->uncached_klass_ref_index_at(index);
1883 klassOop k_o;
1884 if (force_resolution) {
1885 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1886 } else {
1887 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1888 if (k_o == NULL) return NULL;
1889 }
1890 instanceKlassHandle k(THREAD, k_o);
1891 Symbol* name = cp->uncached_name_ref_at(index);
1892 Symbol* sig = cp->uncached_signature_ref_at(index);
1893 fieldDescriptor fd;
1894 klassOop target_klass = k->find_field(name, sig, &fd);
1895 if (target_klass == NULL) {
1896 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1897 }
1898 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1899 return JNIHandles::make_local(field);
1900 }
1901
1902 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1903 {
1904 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1905 JvmtiVMObjectAllocEventCollector oam;
1906 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1907 bounds_check(cp, index, CHECK_NULL);
1908 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1909 return res;
1910 }
1911 JVM_END
1912
1913 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1914 {
1915 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1916 JvmtiVMObjectAllocEventCollector oam;
1917 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1918 bounds_check(cp, index, CHECK_NULL);
1919 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1920 return res;
1921 }
1922 JVM_END
1923
1924 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1925 {
1926 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1927 JvmtiVMObjectAllocEventCollector oam;
1928 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1929 bounds_check(cp, index, CHECK_NULL);
1930 constantTag tag = cp->tag_at(index);
1931 if (!tag.is_field_or_method()) {
1932 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1933 }
1934 int klass_ref = cp->uncached_klass_ref_index_at(index);
1935 Symbol* klass_name = cp->klass_name_at(klass_ref);
1936 Symbol* member_name = cp->uncached_name_ref_at(index);
1937 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1938 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1939 objArrayHandle dest(THREAD, dest_o);
1940 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1941 dest->obj_at_put(0, str());
1942 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1943 dest->obj_at_put(1, str());
1944 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1945 dest->obj_at_put(2, str());
1946 return (jobjectArray) JNIHandles::make_local(dest());
1947 }
1948 JVM_END
1949
1950 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1951 {
1952 JVMWrapper("JVM_ConstantPoolGetIntAt");
1953 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1954 bounds_check(cp, index, CHECK_0);
1955 constantTag tag = cp->tag_at(index);
1956 if (!tag.is_int()) {
1957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1958 }
1959 return cp->int_at(index);
1960 }
1961 JVM_END
1962
1963 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1964 {
1965 JVMWrapper("JVM_ConstantPoolGetLongAt");
1966 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1967 bounds_check(cp, index, CHECK_(0L));
1968 constantTag tag = cp->tag_at(index);
1969 if (!tag.is_long()) {
1970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1971 }
1972 return cp->long_at(index);
1973 }
1974 JVM_END
1975
1976 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1977 {
1978 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1979 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1980 bounds_check(cp, index, CHECK_(0.0f));
1981 constantTag tag = cp->tag_at(index);
1982 if (!tag.is_float()) {
1983 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1984 }
1985 return cp->float_at(index);
1986 }
1987 JVM_END
1988
1989 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1990 {
1991 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1992 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1993 bounds_check(cp, index, CHECK_(0.0));
1994 constantTag tag = cp->tag_at(index);
1995 if (!tag.is_double()) {
1996 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1997 }
1998 return cp->double_at(index);
1999 }
2000 JVM_END
2001
2002 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2003 {
2004 JVMWrapper("JVM_ConstantPoolGetStringAt");
2005 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2006 bounds_check(cp, index, CHECK_NULL);
2007 constantTag tag = cp->tag_at(index);
2008 if (!tag.is_string() && !tag.is_unresolved_string()) {
2009 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2010 }
2011 oop str = cp->string_at(index, CHECK_NULL);
2012 return (jstring) JNIHandles::make_local(str);
2013 }
2014 JVM_END
2015
2016 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2017 {
2018 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2019 JvmtiVMObjectAllocEventCollector oam;
2020 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2021 bounds_check(cp, index, CHECK_NULL);
2022 constantTag tag = cp->tag_at(index);
2023 if (!tag.is_symbol()) {
2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2025 }
2026 Symbol* sym = cp->symbol_at(index);
2027 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2028 return (jstring) JNIHandles::make_local(str());
2029 }
2030 JVM_END
2031
2032
2033 // Assertion support. //////////////////////////////////////////////////////////
2034
2035 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2036 JVMWrapper("JVM_DesiredAssertionStatus");
2037 assert(cls != NULL, "bad class");
2038
2039 oop r = JNIHandles::resolve(cls);
2040 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2041 if (java_lang_Class::is_primitive(r)) return false;
2042
2043 klassOop k = java_lang_Class::as_klassOop(r);
2044 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2045 if (! Klass::cast(k)->oop_is_instance()) return false;
2046
2047 ResourceMark rm(THREAD);
2048 const char* name = Klass::cast(k)->name()->as_C_string();
2049 bool system_class = Klass::cast(k)->class_loader() == NULL;
2050 return JavaAssertions::enabled(name, system_class);
2051
2052 JVM_END
2053
2054
2055 // Return a new AssertionStatusDirectives object with the fields filled in with
2056 // command-line assertion arguments (i.e., -ea, -da).
2057 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2058 JVMWrapper("JVM_AssertionStatusDirectives");
2059 JvmtiVMObjectAllocEventCollector oam;
2060 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2061 return JNIHandles::make_local(env, asd);
2062 JVM_END
2063
2064 // Verification ////////////////////////////////////////////////////////////////////////////////
2065
2066 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2067
2068 // RedefineClasses support: bug 6214132 caused verification to fail.
2069 // All functions from this section should call the jvmtiThreadSate function:
2070 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2071 // The function returns a klassOop of the _scratch_class if the verifier
2072 // was invoked in the middle of the class redefinition.
2073 // Otherwise it returns its argument value which is the _the_class klassOop.
2074 // Please, refer to the description in the jvmtiThreadSate.hpp.
2075
2076 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2077 JVMWrapper("JVM_GetClassNameUTF");
2078 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2079 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2080 return Klass::cast(k)->name()->as_utf8();
2081 JVM_END
2082
2083
2084 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2085 JVMWrapper("JVM_GetClassCPTypes");
2086 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2087 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2088 // types will have length zero if this is not an instanceKlass
2089 // (length is determined by call to JVM_GetClassCPEntriesCount)
2090 if (Klass::cast(k)->oop_is_instance()) {
2091 constantPoolOop cp = instanceKlass::cast(k)->constants();
2092 for (int index = cp->length() - 1; index >= 0; index--) {
2093 constantTag tag = cp->tag_at(index);
2094 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2095 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2096 }
2097 }
2098 JVM_END
2099
2100
2101 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2102 JVMWrapper("JVM_GetClassCPEntriesCount");
2103 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2104 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2105 if (!Klass::cast(k)->oop_is_instance())
2106 return 0;
2107 return instanceKlass::cast(k)->constants()->length();
2108 JVM_END
2109
2110
2111 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2112 JVMWrapper("JVM_GetClassFieldsCount");
2113 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2114 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2115 if (!Klass::cast(k)->oop_is_instance())
2116 return 0;
2117 return instanceKlass::cast(k)->java_fields_count();
2118 JVM_END
2119
2120
2121 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2122 JVMWrapper("JVM_GetClassMethodsCount");
2123 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2124 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2125 if (!Klass::cast(k)->oop_is_instance())
2126 return 0;
2127 return instanceKlass::cast(k)->methods()->length();
2128 JVM_END
2129
2130
2131 // The following methods, used for the verifier, are never called with
2132 // array klasses, so a direct cast to instanceKlass is safe.
2133 // Typically, these methods are called in a loop with bounds determined
2134 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2135 // zero for arrays.
2136 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2137 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2138 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2140 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2141 int length = methodOop(method)->checked_exceptions_length();
2142 if (length > 0) {
2143 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2144 for (int i = 0; i < length; i++) {
2145 exceptions[i] = table[i].class_cp_index;
2146 }
2147 }
2148 JVM_END
2149
2150
2151 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2152 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2153 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2154 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2155 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2156 return methodOop(method)->checked_exceptions_length();
2157 JVM_END
2158
2159
2160 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2161 JVMWrapper("JVM_GetMethodIxByteCode");
2162 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2163 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2164 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2165 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2166 JVM_END
2167
2168
2169 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2170 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2171 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2172 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2173 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2174 return methodOop(method)->code_size();
2175 JVM_END
2176
2177
2178 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2179 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2180 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2181 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2182 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2183 ExceptionTable extable((methodOop(method)));
2184 entry->start_pc = extable.start_pc(entry_index);
2185 entry->end_pc = extable.end_pc(entry_index);
2186 entry->handler_pc = extable.handler_pc(entry_index);
2187 entry->catchType = extable.catch_type_index(entry_index);
2188 JVM_END
2189
2190
2191 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2192 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2193 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2194 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2195 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2196 return methodOop(method)->exception_table_length();
2197 JVM_END
2198
2199
2200 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2201 JVMWrapper("JVM_GetMethodIxModifiers");
2202 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2203 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2204 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2205 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2206 JVM_END
2207
2208
2209 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2210 JVMWrapper("JVM_GetFieldIxModifiers");
2211 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2212 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2213 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2214 JVM_END
2215
2216
2217 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2218 JVMWrapper("JVM_GetMethodIxLocalsCount");
2219 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2220 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2221 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2222 return methodOop(method)->max_locals();
2223 JVM_END
2224
2225
2226 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2227 JVMWrapper("JVM_GetMethodIxArgsSize");
2228 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2229 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2230 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2231 return methodOop(method)->size_of_parameters();
2232 JVM_END
2233
2234
2235 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2236 JVMWrapper("JVM_GetMethodIxMaxStack");
2237 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2238 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2239 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2240 return methodOop(method)->max_stack();
2241 JVM_END
2242
2243
2244 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2245 JVMWrapper("JVM_IsConstructorIx");
2246 ResourceMark rm(THREAD);
2247 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2248 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2249 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2250 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2251 JVM_END
2252
2253
2254 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2255 JVMWrapper("JVM_GetMethodIxIxUTF");
2256 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2257 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2258 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2259 return methodOop(method)->name()->as_utf8();
2260 JVM_END
2261
2262
2263 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2264 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2266 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2267 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2268 return methodOop(method)->signature()->as_utf8();
2269 JVM_END
2270
2271 /**
2272 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2273 * read entries in the constant pool. Since the old verifier always
2274 * works on a copy of the code, it will not see any rewriting that
2275 * may possibly occur in the middle of verification. So it is important
2276 * that nothing it calls tries to use the cpCache instead of the raw
2277 * constant pool, so we must use cp->uncached_x methods when appropriate.
2278 */
2279 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2280 JVMWrapper("JVM_GetCPFieldNameUTF");
2281 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2282 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2283 constantPoolOop cp = instanceKlass::cast(k)->constants();
2284 switch (cp->tag_at(cp_index).value()) {
2285 case JVM_CONSTANT_Fieldref:
2286 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2287 default:
2288 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2289 }
2290 ShouldNotReachHere();
2291 return NULL;
2292 JVM_END
2293
2294
2295 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2296 JVMWrapper("JVM_GetCPMethodNameUTF");
2297 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 constantPoolOop cp = instanceKlass::cast(k)->constants();
2300 switch (cp->tag_at(cp_index).value()) {
2301 case JVM_CONSTANT_InterfaceMethodref:
2302 case JVM_CONSTANT_Methodref:
2303 case JVM_CONSTANT_NameAndType: // for invokedynamic
2304 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2305 default:
2306 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2307 }
2308 ShouldNotReachHere();
2309 return NULL;
2310 JVM_END
2311
2312
2313 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2314 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2315 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2316 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2317 constantPoolOop cp = instanceKlass::cast(k)->constants();
2318 switch (cp->tag_at(cp_index).value()) {
2319 case JVM_CONSTANT_InterfaceMethodref:
2320 case JVM_CONSTANT_Methodref:
2321 case JVM_CONSTANT_NameAndType: // for invokedynamic
2322 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2323 default:
2324 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2325 }
2326 ShouldNotReachHere();
2327 return NULL;
2328 JVM_END
2329
2330
2331 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2332 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2333 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2335 constantPoolOop cp = instanceKlass::cast(k)->constants();
2336 switch (cp->tag_at(cp_index).value()) {
2337 case JVM_CONSTANT_Fieldref:
2338 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2339 default:
2340 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2341 }
2342 ShouldNotReachHere();
2343 return NULL;
2344 JVM_END
2345
2346
2347 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2348 JVMWrapper("JVM_GetCPClassNameUTF");
2349 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2350 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2351 constantPoolOop cp = instanceKlass::cast(k)->constants();
2352 Symbol* classname = cp->klass_name_at(cp_index);
2353 return classname->as_utf8();
2354 JVM_END
2355
2356
2357 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2358 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2359 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2361 constantPoolOop cp = instanceKlass::cast(k)->constants();
2362 switch (cp->tag_at(cp_index).value()) {
2363 case JVM_CONSTANT_Fieldref: {
2364 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2365 Symbol* classname = cp->klass_name_at(class_index);
2366 return classname->as_utf8();
2367 }
2368 default:
2369 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2370 }
2371 ShouldNotReachHere();
2372 return NULL;
2373 JVM_END
2374
2375
2376 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2377 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2378 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380 constantPoolOop cp = instanceKlass::cast(k)->constants();
2381 switch (cp->tag_at(cp_index).value()) {
2382 case JVM_CONSTANT_Methodref:
2383 case JVM_CONSTANT_InterfaceMethodref: {
2384 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2385 Symbol* classname = cp->klass_name_at(class_index);
2386 return classname->as_utf8();
2387 }
2388 default:
2389 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2390 }
2391 ShouldNotReachHere();
2392 return NULL;
2393 JVM_END
2394
2395
2396 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2397 JVMWrapper("JVM_GetCPFieldModifiers");
2398 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2399 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2401 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2402 constantPoolOop cp = instanceKlass::cast(k)->constants();
2403 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2404 switch (cp->tag_at(cp_index).value()) {
2405 case JVM_CONSTANT_Fieldref: {
2406 Symbol* name = cp->uncached_name_ref_at(cp_index);
2407 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2408 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2409 if (fs.name() == name && fs.signature() == signature) {
2410 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2411 }
2412 }
2413 return -1;
2414 }
2415 default:
2416 fatal("JVM_GetCPFieldModifiers: illegal constant");
2417 }
2418 ShouldNotReachHere();
2419 return 0;
2420 JVM_END
2421
2422
2423 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2424 JVMWrapper("JVM_GetCPMethodModifiers");
2425 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2426 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2429 constantPoolOop cp = instanceKlass::cast(k)->constants();
2430 switch (cp->tag_at(cp_index).value()) {
2431 case JVM_CONSTANT_Methodref:
2432 case JVM_CONSTANT_InterfaceMethodref: {
2433 Symbol* name = cp->uncached_name_ref_at(cp_index);
2434 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2435 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2436 int methods_count = methods->length();
2437 for (int i = 0; i < methods_count; i++) {
2438 methodOop method = methodOop(methods->obj_at(i));
2439 if (method->name() == name && method->signature() == signature) {
2440 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2441 }
2442 }
2443 return -1;
2444 }
2445 default:
2446 fatal("JVM_GetCPMethodModifiers: illegal constant");
2447 }
2448 ShouldNotReachHere();
2449 return 0;
2450 JVM_END
2451
2452
2453 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2454
2455 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2456 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2457 JVM_END
2458
2459
2460 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2461 JVMWrapper("JVM_IsSameClassPackage");
2462 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2463 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2464 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2465 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2466 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2467 JVM_END
2468
2469
2470 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2471
2472 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2473 JVMWrapper2("JVM_Open (%s)", fname);
2474
2475 //%note jvm_r6
2476 int result = os::open(fname, flags, mode);
2477 if (result >= 0) {
2478 return result;
2479 } else {
2480 switch(errno) {
2481 case EEXIST:
2482 return JVM_EEXIST;
2483 default:
2484 return -1;
2485 }
2486 }
2487 JVM_END
2488
2489
2490 JVM_LEAF(jint, JVM_Close(jint fd))
2491 JVMWrapper2("JVM_Close (0x%x)", fd);
2492 //%note jvm_r6
2493 return os::close(fd);
2494 JVM_END
2495
2496
2497 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2498 JVMWrapper2("JVM_Read (0x%x)", fd);
2499
2500 //%note jvm_r6
2501 return (jint)os::restartable_read(fd, buf, nbytes);
2502 JVM_END
2503
2504
2505 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2506 JVMWrapper2("JVM_Write (0x%x)", fd);
2507
2508 //%note jvm_r6
2509 return (jint)os::write(fd, buf, nbytes);
2510 JVM_END
2511
2512
2513 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2514 JVMWrapper2("JVM_Available (0x%x)", fd);
2515 //%note jvm_r6
2516 return os::available(fd, pbytes);
2517 JVM_END
2518
2519
2520 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2521 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2522 //%note jvm_r6
2523 return os::lseek(fd, offset, whence);
2524 JVM_END
2525
2526
2527 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2528 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2529 return os::ftruncate(fd, length);
2530 JVM_END
2531
2532
2533 JVM_LEAF(jint, JVM_Sync(jint fd))
2534 JVMWrapper2("JVM_Sync (0x%x)", fd);
2535 //%note jvm_r6
2536 return os::fsync(fd);
2537 JVM_END
2538
2539
2540 // Printing support //////////////////////////////////////////////////
2541 extern "C" {
2542
2543 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2544 // see bug 4399518, 4417214
2545 if ((intptr_t)count <= 0) return -1;
2546 return vsnprintf(str, count, fmt, args);
2547 }
2548
2549
2550 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2551 va_list args;
2552 int len;
2553 va_start(args, fmt);
2554 len = jio_vsnprintf(str, count, fmt, args);
2555 va_end(args);
2556 return len;
2557 }
2558
2559
2560 int jio_fprintf(FILE* f, const char *fmt, ...) {
2561 int len;
2562 va_list args;
2563 va_start(args, fmt);
2564 len = jio_vfprintf(f, fmt, args);
2565 va_end(args);
2566 return len;
2567 }
2568
2569
2570 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2571 if (Arguments::vfprintf_hook() != NULL) {
2572 return Arguments::vfprintf_hook()(f, fmt, args);
2573 } else {
2574 return vfprintf(f, fmt, args);
2575 }
2576 }
2577
2578
2579 JNIEXPORT int jio_printf(const char *fmt, ...) {
2580 int len;
2581 va_list args;
2582 va_start(args, fmt);
2583 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2584 va_end(args);
2585 return len;
2586 }
2587
2588
2589 // HotSpot specific jio method
2590 void jio_print(const char* s) {
2591 // Try to make this function as atomic as possible.
2592 if (Arguments::vfprintf_hook() != NULL) {
2593 jio_fprintf(defaultStream::output_stream(), "%s", s);
2594 } else {
2595 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2596 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2597 }
2598 }
2599
2600 } // Extern C
2601
2602 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2603
2604 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2605 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2606 // OSThread objects. The exception to this rule is when the target object is the thread
2607 // doing the operation, in which case we know that the thread won't exit until the
2608 // operation is done (all exits being voluntary). There are a few cases where it is
2609 // rather silly to do operations on yourself, like resuming yourself or asking whether
2610 // you are alive. While these can still happen, they are not subject to deadlocks if
2611 // the lock is held while the operation occurs (this is not the case for suspend, for
2612 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2613 // implementation is local to this file, we always lock Threads_lock for that one.
2614
2615 static void thread_entry(JavaThread* thread, TRAPS) {
2616 HandleMark hm(THREAD);
2617 Handle obj(THREAD, thread->threadObj());
2618 JavaValue result(T_VOID);
2619 JavaCalls::call_virtual(&result,
2620 obj,
2621 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2622 vmSymbols::run_method_name(),
2623 vmSymbols::void_method_signature(),
2624 THREAD);
2625 }
2626
2627
2628 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2629 JVMWrapper("JVM_StartThread");
2630 JavaThread *native_thread = NULL;
2631
2632 // We cannot hold the Threads_lock when we throw an exception,
2633 // due to rank ordering issues. Example: we might need to grab the
2634 // Heap_lock while we construct the exception.
2635 bool throw_illegal_thread_state = false;
2636
2637 // We must release the Threads_lock before we can post a jvmti event
2638 // in Thread::start.
2639 {
2640 // Ensure that the C++ Thread and OSThread structures aren't freed before
2641 // we operate.
2642 MutexLocker mu(Threads_lock);
2643
2644 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2645 // re-starting an already started thread, so we should usually find
2646 // that the JavaThread is null. However for a JNI attached thread
2647 // there is a small window between the Thread object being created
2648 // (with its JavaThread set) and the update to its threadStatus, so we
2649 // have to check for this
2650 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2651 throw_illegal_thread_state = true;
2652 } else {
2653 // We could also check the stillborn flag to see if this thread was already stopped, but
2654 // for historical reasons we let the thread detect that itself when it starts running
2655
2656 jlong size =
2657 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2658 // Allocate the C++ Thread structure and create the native thread. The
2659 // stack size retrieved from java is signed, but the constructor takes
2660 // size_t (an unsigned type), so avoid passing negative values which would
2661 // result in really large stacks.
2662 size_t sz = size > 0 ? (size_t) size : 0;
2663 native_thread = new JavaThread(&thread_entry, sz);
2664
2665 // At this point it may be possible that no osthread was created for the
2666 // JavaThread due to lack of memory. Check for this situation and throw
2667 // an exception if necessary. Eventually we may want to change this so
2668 // that we only grab the lock if the thread was created successfully -
2669 // then we can also do this check and throw the exception in the
2670 // JavaThread constructor.
2671 if (native_thread->osthread() != NULL) {
2672 // Note: the current thread is not being used within "prepare".
2673 native_thread->prepare(jthread);
2674 }
2675 }
2676 }
2677
2678 if (throw_illegal_thread_state) {
2679 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2680 }
2681
2682 assert(native_thread != NULL, "Starting null thread?");
2683
2684 if (native_thread->osthread() == NULL) {
2685 // No one should hold a reference to the 'native_thread'.
2686 delete native_thread;
2687 if (JvmtiExport::should_post_resource_exhausted()) {
2688 JvmtiExport::post_resource_exhausted(
2689 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2690 "unable to create new native thread");
2691 }
2692 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2693 "unable to create new native thread");
2694 }
2695
2696 Thread::start(native_thread);
2697
2698 JVM_END
2699
2700 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2701 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2702 // but is thought to be reliable and simple. In the case, where the receiver is the
2703 // same thread as the sender, no safepoint is needed.
2704 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2705 JVMWrapper("JVM_StopThread");
2706
2707 oop java_throwable = JNIHandles::resolve(throwable);
2708 if (java_throwable == NULL) {
2709 THROW(vmSymbols::java_lang_NullPointerException());
2710 }
2711 oop java_thread = JNIHandles::resolve_non_null(jthread);
2712 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2713 Events::log_exception(JavaThread::current(),
2714 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2715 receiver, (address)java_thread, throwable);
2716 // First check if thread is alive
2717 if (receiver != NULL) {
2718 // Check if exception is getting thrown at self (use oop equality, since the
2719 // target object might exit)
2720 if (java_thread == thread->threadObj()) {
2721 THROW_OOP(java_throwable);
2722 } else {
2723 // Enques a VM_Operation to stop all threads and then deliver the exception...
2724 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2725 }
2726 }
2727 else {
2728 // Either:
2729 // - target thread has not been started before being stopped, or
2730 // - target thread already terminated
2731 // We could read the threadStatus to determine which case it is
2732 // but that is overkill as it doesn't matter. We must set the
2733 // stillborn flag for the first case, and if the thread has already
2734 // exited setting this flag has no affect
2735 java_lang_Thread::set_stillborn(java_thread);
2736 }
2737 JVM_END
2738
2739
2740 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2741 JVMWrapper("JVM_IsThreadAlive");
2742
2743 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2744 return java_lang_Thread::is_alive(thread_oop);
2745 JVM_END
2746
2747
2748 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2749 JVMWrapper("JVM_SuspendThread");
2750 oop java_thread = JNIHandles::resolve_non_null(jthread);
2751 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2752
2753 if (receiver != NULL) {
2754 // thread has run and has not exited (still on threads list)
2755
2756 {
2757 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2758 if (receiver->is_external_suspend()) {
2759 // Don't allow nested external suspend requests. We can't return
2760 // an error from this interface so just ignore the problem.
2761 return;
2762 }
2763 if (receiver->is_exiting()) { // thread is in the process of exiting
2764 return;
2765 }
2766 receiver->set_external_suspend();
2767 }
2768
2769 // java_suspend() will catch threads in the process of exiting
2770 // and will ignore them.
2771 receiver->java_suspend();
2772
2773 // It would be nice to have the following assertion in all the
2774 // time, but it is possible for a racing resume request to have
2775 // resumed this thread right after we suspended it. Temporarily
2776 // enable this assertion if you are chasing a different kind of
2777 // bug.
2778 //
2779 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2780 // receiver->is_being_ext_suspended(), "thread is not suspended");
2781 }
2782 JVM_END
2783
2784
2785 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2786 JVMWrapper("JVM_ResumeThread");
2787 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2788 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2789 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2790 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2791 // looks at it.
2792 MutexLocker ml(Threads_lock);
2793 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2794 if (thr != NULL) {
2795 // the thread has run and is not in the process of exiting
2796 thr->java_resume();
2797 }
2798 JVM_END
2799
2800
2801 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2802 JVMWrapper("JVM_SetThreadPriority");
2803 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2804 MutexLocker ml(Threads_lock);
2805 oop java_thread = JNIHandles::resolve_non_null(jthread);
2806 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2807 JavaThread* thr = java_lang_Thread::thread(java_thread);
2808 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2809 Thread::set_priority(thr, (ThreadPriority)prio);
2810 }
2811 JVM_END
2812
2813
2814 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2815 JVMWrapper("JVM_Yield");
2816 if (os::dont_yield()) return;
2817 #ifndef USDT2
2818 HS_DTRACE_PROBE0(hotspot, thread__yield);
2819 #else /* USDT2 */
2820 HOTSPOT_THREAD_YIELD();
2821 #endif /* USDT2 */
2822 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2823 // Critical for similar threading behaviour
2824 if (ConvertYieldToSleep) {
2825 os::sleep(thread, MinSleepInterval, false);
2826 } else {
2827 os::yield();
2828 }
2829 JVM_END
2830
2831
2832 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2833 JVMWrapper("JVM_Sleep");
2834
2835 if (millis < 0) {
2836 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2837 }
2838
2839 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2840 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2841 }
2842
2843 // Save current thread state and restore it at the end of this block.
2844 // And set new thread state to SLEEPING.
2845 JavaThreadSleepState jtss(thread);
2846
2847 #ifndef USDT2
2848 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2849 #else /* USDT2 */
2850 HOTSPOT_THREAD_SLEEP_BEGIN(
2851 millis);
2852 #endif /* USDT2 */
2853
2854 if (millis == 0) {
2855 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2856 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2857 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2858 // for SOLARIS
2859 if (ConvertSleepToYield) {
2860 os::yield();
2861 } else {
2862 ThreadState old_state = thread->osthread()->get_state();
2863 thread->osthread()->set_state(SLEEPING);
2864 os::sleep(thread, MinSleepInterval, false);
2865 thread->osthread()->set_state(old_state);
2866 }
2867 } else {
2868 ThreadState old_state = thread->osthread()->get_state();
2869 thread->osthread()->set_state(SLEEPING);
2870 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2871 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2872 // us while we were sleeping. We do not overwrite those.
2873 if (!HAS_PENDING_EXCEPTION) {
2874 #ifndef USDT2
2875 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2876 #else /* USDT2 */
2877 HOTSPOT_THREAD_SLEEP_END(
2878 1);
2879 #endif /* USDT2 */
2880 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2881 // to properly restore the thread state. That's likely wrong.
2882 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2883 }
2884 }
2885 thread->osthread()->set_state(old_state);
2886 }
2887 #ifndef USDT2
2888 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2889 #else /* USDT2 */
2890 HOTSPOT_THREAD_SLEEP_END(
2891 0);
2892 #endif /* USDT2 */
2893 JVM_END
2894
2895 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2896 JVMWrapper("JVM_CurrentThread");
2897 oop jthread = thread->threadObj();
2898 assert (thread != NULL, "no current thread!");
2899 return JNIHandles::make_local(env, jthread);
2900 JVM_END
2901
2902
2903 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2904 JVMWrapper("JVM_CountStackFrames");
2905
2906 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2907 oop java_thread = JNIHandles::resolve_non_null(jthread);
2908 bool throw_illegal_thread_state = false;
2909 int count = 0;
2910
2911 {
2912 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2913 // We need to re-resolve the java_thread, since a GC might have happened during the
2914 // acquire of the lock
2915 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2916
2917 if (thr == NULL) {
2918 // do nothing
2919 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2920 // Check whether this java thread has been suspended already. If not, throws
2921 // IllegalThreadStateException. We defer to throw that exception until
2922 // Threads_lock is released since loading exception class has to leave VM.
2923 // The correct way to test a thread is actually suspended is
2924 // wait_for_ext_suspend_completion(), but we can't call that while holding
2925 // the Threads_lock. The above tests are sufficient for our purposes
2926 // provided the walkability of the stack is stable - which it isn't
2927 // 100% but close enough for most practical purposes.
2928 throw_illegal_thread_state = true;
2929 } else {
2930 // Count all java activation, i.e., number of vframes
2931 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2932 // Native frames are not counted
2933 if (!vfst.method()->is_native()) count++;
2934 }
2935 }
2936 }
2937
2938 if (throw_illegal_thread_state) {
2939 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2940 "this thread is not suspended");
2941 }
2942 return count;
2943 JVM_END
2944
2945 // Consider: A better way to implement JVM_Interrupt() is to acquire
2946 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2947 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2948 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2949 // outside the critical section. Threads_lock is hot so we want to minimize
2950 // the hold-time. A cleaner interface would be to decompose interrupt into
2951 // two steps. The 1st phase, performed under Threads_lock, would return
2952 // a closure that'd be invoked after Threads_lock was dropped.
2953 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2954 // admit spurious wakeups.
2955
2956 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2957 JVMWrapper("JVM_Interrupt");
2958
2959 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2960 oop java_thread = JNIHandles::resolve_non_null(jthread);
2961 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2962 // We need to re-resolve the java_thread, since a GC might have happened during the
2963 // acquire of the lock
2964 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2965 if (thr != NULL) {
2966 Thread::interrupt(thr);
2967 }
2968 JVM_END
2969
2970
2971 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2972 JVMWrapper("JVM_IsInterrupted");
2973
2974 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2975 oop java_thread = JNIHandles::resolve_non_null(jthread);
2976 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2977 // We need to re-resolve the java_thread, since a GC might have happened during the
2978 // acquire of the lock
2979 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2980 if (thr == NULL) {
2981 return JNI_FALSE;
2982 } else {
2983 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2984 }
2985 JVM_END
2986
2987
2988 // Return true iff the current thread has locked the object passed in
2989
2990 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2991 JVMWrapper("JVM_HoldsLock");
2992 assert(THREAD->is_Java_thread(), "sanity check");
2993 if (obj == NULL) {
2994 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2995 }
2996 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2997 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2998 JVM_END
2999
3000
3001 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3002 JVMWrapper("JVM_DumpAllStacks");
3003 VM_PrintThreads op;
3004 VMThread::execute(&op);
3005 if (JvmtiExport::should_post_data_dump()) {
3006 JvmtiExport::post_data_dump();
3007 }
3008 JVM_END
3009
3010 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3011 JVMWrapper("JVM_SetNativeThreadName");
3012 ResourceMark rm(THREAD);
3013 oop java_thread = JNIHandles::resolve_non_null(jthread);
3014 JavaThread* thr = java_lang_Thread::thread(java_thread);
3015 // Thread naming only supported for the current thread, doesn't work for
3016 // target threads.
3017 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3018 // we don't set the name of an attached thread to avoid stepping
3019 // on other programs
3020 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3021 os::set_native_thread_name(thread_name);
3022 }
3023 JVM_END
3024
3025 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3026
3027 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3028 assert(jthread->is_Java_thread(), "must be a Java thread");
3029 if (jthread->privileged_stack_top() == NULL) return false;
3030 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3031 oop loader = jthread->privileged_stack_top()->class_loader();
3032 if (loader == NULL) return true;
3033 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3034 if (trusted) return true;
3035 }
3036 return false;
3037 }
3038
3039 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3040 JVMWrapper("JVM_CurrentLoadedClass");
3041 ResourceMark rm(THREAD);
3042
3043 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3044 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3045 bool trusted = is_trusted_frame(thread, &vfst);
3046 if (trusted) return NULL;
3047
3048 methodOop m = vfst.method();
3049 if (!m->is_native()) {
3050 klassOop holder = m->method_holder();
3051 oop loader = instanceKlass::cast(holder)->class_loader();
3052 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3053 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3054 }
3055 }
3056 }
3057 return NULL;
3058 JVM_END
3059
3060
3061 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3062 JVMWrapper("JVM_CurrentClassLoader");
3063 ResourceMark rm(THREAD);
3064
3065 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3066
3067 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3068 bool trusted = is_trusted_frame(thread, &vfst);
3069 if (trusted) return NULL;
3070
3071 methodOop m = vfst.method();
3072 if (!m->is_native()) {
3073 klassOop holder = m->method_holder();
3074 assert(holder->is_klass(), "just checking");
3075 oop loader = instanceKlass::cast(holder)->class_loader();
3076 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3077 return JNIHandles::make_local(env, loader);
3078 }
3079 }
3080 }
3081 return NULL;
3082 JVM_END
3083
3084
3085 // Utility object for collecting method holders walking down the stack
3086 class KlassLink: public ResourceObj {
3087 public:
3088 KlassHandle klass;
3089 KlassLink* next;
3090
3091 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3092 };
3093
3094
3095 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3096 JVMWrapper("JVM_GetClassContext");
3097 ResourceMark rm(THREAD);
3098 JvmtiVMObjectAllocEventCollector oam;
3099 // Collect linked list of (handles to) method holders
3100 KlassLink* first = NULL;
3101 KlassLink* last = NULL;
3102 int depth = 0;
3103
3104 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3105 // Native frames are not returned
3106 if (!vfst.method()->is_native()) {
3107 klassOop holder = vfst.method()->method_holder();
3108 assert(holder->is_klass(), "just checking");
3109 depth++;
3110 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3111 if (first == NULL) {
3112 first = last = l;
3113 } else {
3114 last->next = l;
3115 last = l;
3116 }
3117 }
3118 }
3119
3120 // Create result array of type [Ljava/lang/Class;
3121 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3122 // Fill in mirrors corresponding to method holders
3123 int index = 0;
3124 while (first != NULL) {
3125 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3126 first = first->next;
3127 }
3128 assert(index == depth, "just checking");
3129
3130 return (jobjectArray) JNIHandles::make_local(env, result);
3131 JVM_END
3132
3133
3134 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3135 JVMWrapper("JVM_ClassDepth");
3136 ResourceMark rm(THREAD);
3137 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3138 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3139
3140 const char* str = java_lang_String::as_utf8_string(class_name_str());
3141 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3142 if (class_name_sym == NULL) {
3143 return -1;
3144 }
3145
3146 int depth = 0;
3147
3148 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3149 if (!vfst.method()->is_native()) {
3150 klassOop holder = vfst.method()->method_holder();
3151 assert(holder->is_klass(), "just checking");
3152 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3153 return depth;
3154 }
3155 depth++;
3156 }
3157 }
3158 return -1;
3159 JVM_END
3160
3161
3162 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3163 JVMWrapper("JVM_ClassLoaderDepth");
3164 ResourceMark rm(THREAD);
3165 int depth = 0;
3166 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3167 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3168 bool trusted = is_trusted_frame(thread, &vfst);
3169 if (trusted) return -1;
3170
3171 methodOop m = vfst.method();
3172 if (!m->is_native()) {
3173 klassOop holder = m->method_holder();
3174 assert(holder->is_klass(), "just checking");
3175 oop loader = instanceKlass::cast(holder)->class_loader();
3176 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3177 return depth;
3178 }
3179 depth++;
3180 }
3181 }
3182 return -1;
3183 JVM_END
3184
3185
3186 // java.lang.Package ////////////////////////////////////////////////////////////////
3187
3188
3189 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3190 JVMWrapper("JVM_GetSystemPackage");
3191 ResourceMark rm(THREAD);
3192 JvmtiVMObjectAllocEventCollector oam;
3193 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3194 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3195 return (jstring) JNIHandles::make_local(result);
3196 JVM_END
3197
3198
3199 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3200 JVMWrapper("JVM_GetSystemPackages");
3201 JvmtiVMObjectAllocEventCollector oam;
3202 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3203 return (jobjectArray) JNIHandles::make_local(result);
3204 JVM_END
3205
3206
3207 // ObjectInputStream ///////////////////////////////////////////////////////////////
3208
3209 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3210 if (current_class == NULL) {
3211 return true;
3212 }
3213 if ((current_class == field_class) || access.is_public()) {
3214 return true;
3215 }
3216
3217 if (access.is_protected()) {
3218 // See if current_class is a subclass of field_class
3219 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3220 return true;
3221 }
3222 }
3223
3224 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3225 }
3226
3227
3228 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3229 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3230 JVMWrapper("JVM_AllocateNewObject");
3231 JvmtiVMObjectAllocEventCollector oam;
3232 // Receiver is not used
3233 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3234 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3235
3236 // Cannot instantiate primitive types
3237 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3238 ResourceMark rm(THREAD);
3239 THROW_0(vmSymbols::java_lang_InvalidClassException());
3240 }
3241
3242 // Arrays not allowed here, must use JVM_AllocateNewArray
3243 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3244 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3245 ResourceMark rm(THREAD);
3246 THROW_0(vmSymbols::java_lang_InvalidClassException());
3247 }
3248
3249 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3250 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3251
3252 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3253
3254 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3255 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3256
3257 // Make sure klass is initialized, since we are about to instantiate one of them.
3258 curr_klass->initialize(CHECK_NULL);
3259
3260 methodHandle m (THREAD,
3261 init_klass->find_method(vmSymbols::object_initializer_name(),
3262 vmSymbols::void_method_signature()));
3263 if (m.is_null()) {
3264 ResourceMark rm(THREAD);
3265 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3266 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3267 vmSymbols::object_initializer_name(),
3268 vmSymbols::void_method_signature()));
3269 }
3270
3271 if (curr_klass == init_klass && !m->is_public()) {
3272 // Calling the constructor for class 'curr_klass'.
3273 // Only allow calls to a public no-arg constructor.
3274 // This path corresponds to creating an Externalizable object.
3275 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3276 }
3277
3278 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3279 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3280 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3281 }
3282
3283 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3284 // Call constructor m. This might call a constructor higher up in the hierachy
3285 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3286
3287 return JNIHandles::make_local(obj());
3288 JVM_END
3289
3290
3291 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3292 JVMWrapper("JVM_AllocateNewArray");
3293 JvmtiVMObjectAllocEventCollector oam;
3294 oop mirror = JNIHandles::resolve_non_null(currClass);
3295
3296 if (java_lang_Class::is_primitive(mirror)) {
3297 THROW_0(vmSymbols::java_lang_InvalidClassException());
3298 }
3299 klassOop k = java_lang_Class::as_klassOop(mirror);
3300 oop result;
3301
3302 if (k->klass_part()->oop_is_typeArray()) {
3303 // typeArray
3304 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3305 } else if (k->klass_part()->oop_is_objArray()) {
3306 // objArray
3307 objArrayKlassHandle oak(THREAD, k);
3308 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3309 result = oak->allocate(length, CHECK_NULL);
3310 } else {
3311 THROW_0(vmSymbols::java_lang_InvalidClassException());
3312 }
3313 return JNIHandles::make_local(env, result);
3314 JVM_END
3315
3316
3317 // Return the first non-null class loader up the execution stack, or null
3318 // if only code from the null class loader is on the stack.
3319
3320 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3321 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3322 // UseNewReflection
3323 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3324 klassOop holder = vfst.method()->method_holder();
3325 oop loader = instanceKlass::cast(holder)->class_loader();
3326 if (loader != NULL) {
3327 return JNIHandles::make_local(env, loader);
3328 }
3329 }
3330 return NULL;
3331 JVM_END
3332
3333
3334 // Load a class relative to the most recent class on the stack with a non-null
3335 // classloader.
3336 // This function has been deprecated and should not be considered part of the
3337 // specified JVM interface.
3338
3339 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3340 jclass currClass, jstring currClassName))
3341 JVMWrapper("JVM_LoadClass0");
3342 // Receiver is not used
3343 ResourceMark rm(THREAD);
3344
3345 // Class name argument is not guaranteed to be in internal format
3346 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3347 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3348
3349 const char* str = java_lang_String::as_utf8_string(string());
3350
3351 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3352 // It's impossible to create this class; the name cannot fit
3353 // into the constant pool.
3354 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3355 }
3356
3357 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3358 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3359 // Find the most recent class on the stack with a non-null classloader
3360 oop loader = NULL;
3361 oop protection_domain = NULL;
3362 if (curr_klass.is_null()) {
3363 for (vframeStream vfst(thread);
3364 !vfst.at_end() && loader == NULL;
3365 vfst.next()) {
3366 if (!vfst.method()->is_native()) {
3367 klassOop holder = vfst.method()->method_holder();
3368 loader = instanceKlass::cast(holder)->class_loader();
3369 protection_domain = instanceKlass::cast(holder)->protection_domain();
3370 }
3371 }
3372 } else {
3373 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3374 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3375 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3376 }
3377 Handle h_loader(THREAD, loader);
3378 Handle h_prot (THREAD, protection_domain);
3379 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3380 false, thread);
3381 if (TraceClassResolution && result != NULL) {
3382 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3383 }
3384 return result;
3385 JVM_END
3386
3387
3388 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3389
3390
3391 // resolve array handle and check arguments
3392 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3393 if (arr == NULL) {
3394 THROW_0(vmSymbols::java_lang_NullPointerException());
3395 }
3396 oop a = JNIHandles::resolve_non_null(arr);
3397 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3398 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3399 }
3400 return arrayOop(a);
3401 }
3402
3403
3404 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3405 JVMWrapper("JVM_GetArrayLength");
3406 arrayOop a = check_array(env, arr, false, CHECK_0);
3407 return a->length();
3408 JVM_END
3409
3410
3411 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3412 JVMWrapper("JVM_Array_Get");
3413 JvmtiVMObjectAllocEventCollector oam;
3414 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3415 jvalue value;
3416 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3417 oop box = Reflection::box(&value, type, CHECK_NULL);
3418 return JNIHandles::make_local(env, box);
3419 JVM_END
3420
3421
3422 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3423 JVMWrapper("JVM_GetPrimitiveArrayElement");
3424 jvalue value;
3425 value.i = 0; // to initialize value before getting used in CHECK
3426 arrayOop a = check_array(env, arr, true, CHECK_(value));
3427 assert(a->is_typeArray(), "just checking");
3428 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3429 BasicType wide_type = (BasicType) wCode;
3430 if (type != wide_type) {
3431 Reflection::widen(&value, type, wide_type, CHECK_(value));
3432 }
3433 return value;
3434 JVM_END
3435
3436
3437 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3438 JVMWrapper("JVM_SetArrayElement");
3439 arrayOop a = check_array(env, arr, false, CHECK);
3440 oop box = JNIHandles::resolve(val);
3441 jvalue value;
3442 value.i = 0; // to initialize value before getting used in CHECK
3443 BasicType value_type;
3444 if (a->is_objArray()) {
3445 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3446 value_type = Reflection::unbox_for_regular_object(box, &value);
3447 } else {
3448 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3449 }
3450 Reflection::array_set(&value, a, index, value_type, CHECK);
3451 JVM_END
3452
3453
3454 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3455 JVMWrapper("JVM_SetPrimitiveArrayElement");
3456 arrayOop a = check_array(env, arr, true, CHECK);
3457 assert(a->is_typeArray(), "just checking");
3458 BasicType value_type = (BasicType) vCode;
3459 Reflection::array_set(&v, a, index, value_type, CHECK);
3460 JVM_END
3461
3462
3463 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3464 JVMWrapper("JVM_NewArray");
3465 JvmtiVMObjectAllocEventCollector oam;
3466 oop element_mirror = JNIHandles::resolve(eltClass);
3467 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3468 return JNIHandles::make_local(env, result);
3469 JVM_END
3470
3471
3472 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3473 JVMWrapper("JVM_NewMultiArray");
3474 JvmtiVMObjectAllocEventCollector oam;
3475 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3476 oop element_mirror = JNIHandles::resolve(eltClass);
3477 assert(dim_array->is_typeArray(), "just checking");
3478 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3479 return JNIHandles::make_local(env, result);
3480 JVM_END
3481
3482
3483 // Networking library support ////////////////////////////////////////////////////////////////////
3484
3485 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3486 JVMWrapper("JVM_InitializeSocketLibrary");
3487 return 0;
3488 JVM_END
3489
3490
3491 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3492 JVMWrapper("JVM_Socket");
3493 return os::socket(domain, type, protocol);
3494 JVM_END
3495
3496
3497 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3498 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3499 //%note jvm_r6
3500 return os::socket_close(fd);
3501 JVM_END
3502
3503
3504 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3505 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3506 //%note jvm_r6
3507 return os::socket_shutdown(fd, howto);
3508 JVM_END
3509
3510
3511 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3512 JVMWrapper2("JVM_Recv (0x%x)", fd);
3513 //%note jvm_r6
3514 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3515 JVM_END
3516
3517
3518 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3519 JVMWrapper2("JVM_Send (0x%x)", fd);
3520 //%note jvm_r6
3521 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3522 JVM_END
3523
3524
3525 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3526 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3527 //%note jvm_r6
3528 return os::timeout(fd, timeout);
3529 JVM_END
3530
3531
3532 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3533 JVMWrapper2("JVM_Listen (0x%x)", fd);
3534 //%note jvm_r6
3535 return os::listen(fd, count);
3536 JVM_END
3537
3538
3539 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3540 JVMWrapper2("JVM_Connect (0x%x)", fd);
3541 //%note jvm_r6
3542 return os::connect(fd, him, (socklen_t)len);
3543 JVM_END
3544
3545
3546 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3547 JVMWrapper2("JVM_Bind (0x%x)", fd);
3548 //%note jvm_r6
3549 return os::bind(fd, him, (socklen_t)len);
3550 JVM_END
3551
3552
3553 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3554 JVMWrapper2("JVM_Accept (0x%x)", fd);
3555 //%note jvm_r6
3556 socklen_t socklen = (socklen_t)(*len);
3557 jint result = os::accept(fd, him, &socklen);
3558 *len = (jint)socklen;
3559 return result;
3560 JVM_END
3561
3562
3563 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3564 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3565 //%note jvm_r6
3566 socklen_t socklen = (socklen_t)(*fromlen);
3567 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3568 *fromlen = (int)socklen;
3569 return result;
3570 JVM_END
3571
3572
3573 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3574 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3575 //%note jvm_r6
3576 socklen_t socklen = (socklen_t)(*len);
3577 jint result = os::get_sock_name(fd, him, &socklen);
3578 *len = (int)socklen;
3579 return result;
3580 JVM_END
3581
3582
3583 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3584 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3585 //%note jvm_r6
3586 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3587 JVM_END
3588
3589
3590 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3591 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3592 //%note jvm_r6
3593 return os::socket_available(fd, pbytes);
3594 JVM_END
3595
3596
3597 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3598 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3599 //%note jvm_r6
3600 socklen_t socklen = (socklen_t)(*optlen);
3601 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3602 *optlen = (int)socklen;
3603 return result;
3604 JVM_END
3605
3606
3607 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3608 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3609 //%note jvm_r6
3610 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3611 JVM_END
3612
3613
3614 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3615 JVMWrapper("JVM_GetHostName");
3616 return os::get_host_name(name, namelen);
3617 JVM_END
3618
3619
3620 // Library support ///////////////////////////////////////////////////////////////////////////
3621
3622 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3623 //%note jvm_ct
3624 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3625 char ebuf[1024];
3626 void *load_result;
3627 {
3628 ThreadToNativeFromVM ttnfvm(thread);
3629 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3630 }
3631 if (load_result == NULL) {
3632 char msg[1024];
3633 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3634 // Since 'ebuf' may contain a string encoded using
3635 // platform encoding scheme, we need to pass
3636 // Exceptions::unsafe_to_utf8 to the new_exception method
3637 // as the last argument. See bug 6367357.
3638 Handle h_exception =
3639 Exceptions::new_exception(thread,
3640 vmSymbols::java_lang_UnsatisfiedLinkError(),
3641 msg, Exceptions::unsafe_to_utf8);
3642
3643 THROW_HANDLE_0(h_exception);
3644 }
3645 return load_result;
3646 JVM_END
3647
3648
3649 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3650 JVMWrapper("JVM_UnloadLibrary");
3651 os::dll_unload(handle);
3652 JVM_END
3653
3654
3655 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3656 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3657 return os::dll_lookup(handle, name);
3658 JVM_END
3659
3660
3661 // Floating point support ////////////////////////////////////////////////////////////////////
3662
3663 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3664 JVMWrapper("JVM_IsNaN");
3665 return g_isnan(a);
3666 JVM_END
3667
3668
3669 // JNI version ///////////////////////////////////////////////////////////////////////////////
3670
3671 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3672 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3673 return Threads::is_supported_jni_version_including_1_1(version);
3674 JVM_END
3675
3676
3677 // String support ///////////////////////////////////////////////////////////////////////////
3678
3679 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3680 JVMWrapper("JVM_InternString");
3681 JvmtiVMObjectAllocEventCollector oam;
3682 if (str == NULL) return NULL;
3683 oop string = JNIHandles::resolve_non_null(str);
3684 oop result = StringTable::intern(string, CHECK_NULL);
3685 return (jstring) JNIHandles::make_local(env, result);
3686 JVM_END
3687
3688
3689 // Raw monitor support //////////////////////////////////////////////////////////////////////
3690
3691 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3692 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3693 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3694 // that only works with java threads.
3695
3696
3697 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3698 VM_Exit::block_if_vm_exited();
3699 JVMWrapper("JVM_RawMonitorCreate");
3700 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3701 }
3702
3703
3704 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3705 VM_Exit::block_if_vm_exited();
3706 JVMWrapper("JVM_RawMonitorDestroy");
3707 delete ((Mutex*) mon);
3708 }
3709
3710
3711 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3712 VM_Exit::block_if_vm_exited();
3713 JVMWrapper("JVM_RawMonitorEnter");
3714 ((Mutex*) mon)->jvm_raw_lock();
3715 return 0;
3716 }
3717
3718
3719 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3720 VM_Exit::block_if_vm_exited();
3721 JVMWrapper("JVM_RawMonitorExit");
3722 ((Mutex*) mon)->jvm_raw_unlock();
3723 }
3724
3725
3726 // Support for Serialization
3727
3728 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3729 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3730 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3731 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3732
3733 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3734 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3735 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3736 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3737
3738
3739 void initialize_converter_functions() {
3740 if (JDK_Version::is_gte_jdk14x_version()) {
3741 // These functions only exist for compatibility with 1.3.1 and earlier
3742 return;
3743 }
3744
3745 // called from universe_post_init()
3746 assert(
3747 int_bits_to_float_fn == NULL &&
3748 long_bits_to_double_fn == NULL &&
3749 float_to_int_bits_fn == NULL &&
3750 double_to_long_bits_fn == NULL ,
3751 "initialization done twice"
3752 );
3753 // initialize
3754 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3755 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3756 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3757 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3758 // verify
3759 assert(
3760 int_bits_to_float_fn != NULL &&
3761 long_bits_to_double_fn != NULL &&
3762 float_to_int_bits_fn != NULL &&
3763 double_to_long_bits_fn != NULL ,
3764 "initialization failed"
3765 );
3766 }
3767
3768
3769 // Serialization
3770 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3771 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3772 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3773
3774 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3775 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3776 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3777 oop o = JNIHandles::resolve(obj);
3778
3779 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3780 THROW(vmSymbols::java_lang_NullPointerException());
3781 }
3782
3783 jsize nfids = fids->length();
3784 if (nfids == 0) return;
3785
3786 if (tcodes->length() < nfids) {
3787 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3788 }
3789
3790 jsize off = 0;
3791 /* loop through fields, setting values */
3792 for (jsize i = 0; i < nfids; i++) {
3793 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3794 int field_offset;
3795 if (fid != NULL) {
3796 // NULL is a legal value for fid, but retrieving the field offset
3797 // trigger assertion in that case
3798 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3799 }
3800
3801 switch (tcodes->char_at(i)) {
3802 case 'Z':
3803 if (fid != NULL) {
3804 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3805 o->bool_field_put(field_offset, val);
3806 }
3807 off++;
3808 break;
3809
3810 case 'B':
3811 if (fid != NULL) {
3812 o->byte_field_put(field_offset, dbuf->byte_at(off));
3813 }
3814 off++;
3815 break;
3816
3817 case 'C':
3818 if (fid != NULL) {
3819 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3820 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3821 o->char_field_put(field_offset, val);
3822 }
3823 off += 2;
3824 break;
3825
3826 case 'S':
3827 if (fid != NULL) {
3828 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3829 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3830 o->short_field_put(field_offset, val);
3831 }
3832 off += 2;
3833 break;
3834
3835 case 'I':
3836 if (fid != NULL) {
3837 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3838 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3839 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3840 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3841 o->int_field_put(field_offset, ival);
3842 }
3843 off += 4;
3844 break;
3845
3846 case 'F':
3847 if (fid != NULL) {
3848 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3849 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3850 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3851 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3852 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3853 o->float_field_put(field_offset, fval);
3854 }
3855 off += 4;
3856 break;
3857
3858 case 'J':
3859 if (fid != NULL) {
3860 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3861 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3862 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3863 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3864 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3865 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3866 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3867 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3868 o->long_field_put(field_offset, lval);
3869 }
3870 off += 8;
3871 break;
3872
3873 case 'D':
3874 if (fid != NULL) {
3875 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3876 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3877 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3878 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3879 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3880 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3881 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3882 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3883 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3884 o->double_field_put(field_offset, dval);
3885 }
3886 off += 8;
3887 break;
3888
3889 default:
3890 // Illegal typecode
3891 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3892 }
3893 }
3894 JVM_END
3895
3896
3897 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3898 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3899 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3900
3901 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3902 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3903 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3904 oop o = JNIHandles::resolve(obj);
3905
3906 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3907 THROW(vmSymbols::java_lang_NullPointerException());
3908 }
3909
3910 jsize nfids = fids->length();
3911 if (nfids == 0) return;
3912
3913 if (tcodes->length() < nfids) {
3914 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3915 }
3916
3917 /* loop through fields, fetching values */
3918 jsize off = 0;
3919 for (jsize i = 0; i < nfids; i++) {
3920 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3921 if (fid == NULL) {
3922 THROW(vmSymbols::java_lang_NullPointerException());
3923 }
3924 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3925
3926 switch (tcodes->char_at(i)) {
3927 case 'Z':
3928 {
3929 jboolean val = o->bool_field(field_offset);
3930 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3931 }
3932 break;
3933
3934 case 'B':
3935 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3936 break;
3937
3938 case 'C':
3939 {
3940 jchar val = o->char_field(field_offset);
3941 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3942 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3943 }
3944 break;
3945
3946 case 'S':
3947 {
3948 jshort val = o->short_field(field_offset);
3949 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3950 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3951 }
3952 break;
3953
3954 case 'I':
3955 {
3956 jint val = o->int_field(field_offset);
3957 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3958 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3959 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3960 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3961 }
3962 break;
3963
3964 case 'F':
3965 {
3966 jfloat fval = o->float_field(field_offset);
3967 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3968 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3969 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3970 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3971 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3972 }
3973 break;
3974
3975 case 'J':
3976 {
3977 jlong val = o->long_field(field_offset);
3978 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3979 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3980 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3981 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3982 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3983 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3984 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3985 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3986 }
3987 break;
3988
3989 case 'D':
3990 {
3991 jdouble dval = o->double_field(field_offset);
3992 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3993 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3994 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3995 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3996 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3997 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3998 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3999 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4000 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4001 }
4002 break;
4003
4004 default:
4005 // Illegal typecode
4006 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4007 }
4008 }
4009 JVM_END
4010
4011
4012 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4013
4014 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4015 // Security Note:
4016 // The Java level wrapper will perform the necessary security check allowing
4017 // us to pass the NULL as the initiating class loader.
4018 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4019
4020 KlassHandle klass_handle(THREAD, klass);
4021 // Check if we should initialize the class
4022 if (init && klass_handle->oop_is_instance()) {
4023 klass_handle->initialize(CHECK_NULL);
4024 }
4025 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4026 }
4027
4028
4029 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4030
4031 #ifndef PRODUCT
4032
4033 extern "C" {
4034 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4035 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4036 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4037 }
4038
4039 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4040 JVMWrapper("JVM_AccessBoolVMFlag");
4041 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4042 JVM_END
4043
4044 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4045 JVMWrapper("JVM_AccessVMIntFlag");
4046 intx v;
4047 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4048 *value = (jint)v;
4049 return result;
4050 JVM_END
4051
4052
4053 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4054 JVMWrapper("JVM_VMBreakPoint");
4055 oop the_obj = JNIHandles::resolve(obj);
4056 BREAKPOINT;
4057 JVM_END
4058
4059
4060 #endif
4061
4062
4063 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4064
4065 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4066 JVMWrapper("JVM_InvokeMethod");
4067 Handle method_handle;
4068 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4069 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4070 Handle receiver(THREAD, JNIHandles::resolve(obj));
4071 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4072 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4073 jobject res = JNIHandles::make_local(env, result);
4074 if (JvmtiExport::should_post_vm_object_alloc()) {
4075 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4076 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4077 if (java_lang_Class::is_primitive(ret_type)) {
4078 // Only for primitive type vm allocates memory for java object.
4079 // See box() method.
4080 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4081 }
4082 }
4083 return res;
4084 } else {
4085 THROW_0(vmSymbols::java_lang_StackOverflowError());
4086 }
4087 JVM_END
4088
4089
4090 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4091 JVMWrapper("JVM_NewInstanceFromConstructor");
4092 oop constructor_mirror = JNIHandles::resolve(c);
4093 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4094 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4095 jobject res = JNIHandles::make_local(env, result);
4096 if (JvmtiExport::should_post_vm_object_alloc()) {
4097 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4098 }
4099 return res;
4100 JVM_END
4101
4102 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4103
4104 JVM_LEAF(jboolean, JVM_SupportsCX8())
4105 JVMWrapper("JVM_SupportsCX8");
4106 return VM_Version::supports_cx8();
4107 JVM_END
4108
4109
4110 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4111 JVMWrapper("JVM_CX8Field");
4112 jlong res;
4113 oop o = JNIHandles::resolve(obj);
4114 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4115 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4116
4117 assert(VM_Version::supports_cx8(), "cx8 not supported");
4118 res = Atomic::cmpxchg(newVal, addr, oldVal);
4119
4120 return res == oldVal;
4121 JVM_END
4122
4123 // DTrace ///////////////////////////////////////////////////////////////////
4124
4125 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4126 JVMWrapper("JVM_DTraceGetVersion");
4127 return (jint)JVM_TRACING_DTRACE_VERSION;
4128 JVM_END
4129
4130 JVM_ENTRY(jlong,JVM_DTraceActivate(
4131 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4132 JVM_DTraceProvider* providers))
4133 JVMWrapper("JVM_DTraceActivate");
4134 return DTraceJSDT::activate(
4135 version, module_name, providers_count, providers, CHECK_0);
4136 JVM_END
4137
4138 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4139 JVMWrapper("JVM_DTraceIsProbeEnabled");
4140 return DTraceJSDT::is_probe_enabled(method);
4141 JVM_END
4142
4143 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4144 JVMWrapper("JVM_DTraceDispose");
4145 DTraceJSDT::dispose(handle);
4146 JVM_END
4147
4148 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4149 JVMWrapper("JVM_DTraceIsSupported");
4150 return DTraceJSDT::is_supported();
4151 JVM_END
4152
4153 // Returns an array of all live Thread objects (VM internal JavaThreads,
4154 // jvmti agent threads, and JNI attaching threads are skipped)
4155 // See CR 6404306 regarding JNI attaching threads
4156 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4157 ResourceMark rm(THREAD);
4158 ThreadsListEnumerator tle(THREAD, false, false);
4159 JvmtiVMObjectAllocEventCollector oam;
4160
4161 int num_threads = tle.num_threads();
4162 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4163 objArrayHandle threads_ah(THREAD, r);
4164
4165 for (int i = 0; i < num_threads; i++) {
4166 Handle h = tle.get_threadObj(i);
4167 threads_ah->obj_at_put(i, h());
4168 }
4169
4170 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4171 JVM_END
4172
4173
4174 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4175 // Return StackTraceElement[][], each element is the stack trace of a thread in
4176 // the corresponding entry in the given threads array
4177 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4178 JVMWrapper("JVM_DumpThreads");
4179 JvmtiVMObjectAllocEventCollector oam;
4180
4181 // Check if threads is null
4182 if (threads == NULL) {
4183 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4184 }
4185
4186 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4187 objArrayHandle ah(THREAD, a);
4188 int num_threads = ah->length();
4189 // check if threads is non-empty array
4190 if (num_threads == 0) {
4191 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4192 }
4193
4194 // check if threads is not an array of objects of Thread class
4195 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4196 if (k != SystemDictionary::Thread_klass()) {
4197 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4198 }
4199
4200 ResourceMark rm(THREAD);
4201
4202 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4203 for (int i = 0; i < num_threads; i++) {
4204 oop thread_obj = ah->obj_at(i);
4205 instanceHandle h(THREAD, (instanceOop) thread_obj);
4206 thread_handle_array->append(h);
4207 }
4208
4209 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4210 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4211
4212 JVM_END
4213
4214 // JVM monitoring and management support
4215 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4216 return Management::get_jmm_interface(version);
4217 JVM_END
4218
4219 // com.sun.tools.attach.VirtualMachine agent properties support
4220 //
4221 // Initialize the agent properties with the properties maintained in the VM
4222 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4223 JVMWrapper("JVM_InitAgentProperties");
4224 ResourceMark rm;
4225
4226 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4227
4228 PUTPROP(props, "sun.java.command", Arguments::java_command());
4229 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4230 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4231 return properties;
4232 JVM_END
4233
4234 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4235 {
4236 JVMWrapper("JVM_GetEnclosingMethodInfo");
4237 JvmtiVMObjectAllocEventCollector oam;
4238
4239 if (ofClass == NULL) {
4240 return NULL;
4241 }
4242 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4243 // Special handling for primitive objects
4244 if (java_lang_Class::is_primitive(mirror())) {
4245 return NULL;
4246 }
4247 klassOop k = java_lang_Class::as_klassOop(mirror());
4248 if (!Klass::cast(k)->oop_is_instance()) {
4249 return NULL;
4250 }
4251 instanceKlassHandle ik_h(THREAD, k);
4252 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4253 if (encl_method_class_idx == 0) {
4254 return NULL;
4255 }
4256 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4257 objArrayHandle dest(THREAD, dest_o);
4258 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4259 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4260 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4261 if (encl_method_method_idx != 0) {
4262 Symbol* sym = ik_h->constants()->symbol_at(
4263 extract_low_short_from_int(
4264 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4265 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4266 dest->obj_at_put(1, str());
4267 sym = ik_h->constants()->symbol_at(
4268 extract_high_short_from_int(
4269 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4270 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4271 dest->obj_at_put(2, str());
4272 }
4273 return (jobjectArray) JNIHandles::make_local(dest());
4274 }
4275 JVM_END
4276
4277 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4278 jint javaThreadState))
4279 {
4280 // If new thread states are added in future JDK and VM versions,
4281 // this should check if the JDK version is compatible with thread
4282 // states supported by the VM. Return NULL if not compatible.
4283 //
4284 // This function must map the VM java_lang_Thread::ThreadStatus
4285 // to the Java thread state that the JDK supports.
4286 //
4287
4288 typeArrayHandle values_h;
4289 switch (javaThreadState) {
4290 case JAVA_THREAD_STATE_NEW : {
4291 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4292 values_h = typeArrayHandle(THREAD, r);
4293 values_h->int_at_put(0, java_lang_Thread::NEW);
4294 break;
4295 }
4296 case JAVA_THREAD_STATE_RUNNABLE : {
4297 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4298 values_h = typeArrayHandle(THREAD, r);
4299 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4300 break;
4301 }
4302 case JAVA_THREAD_STATE_BLOCKED : {
4303 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4304 values_h = typeArrayHandle(THREAD, r);
4305 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4306 break;
4307 }
4308 case JAVA_THREAD_STATE_WAITING : {
4309 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4310 values_h = typeArrayHandle(THREAD, r);
4311 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4312 values_h->int_at_put(1, java_lang_Thread::PARKED);
4313 break;
4314 }
4315 case JAVA_THREAD_STATE_TIMED_WAITING : {
4316 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4317 values_h = typeArrayHandle(THREAD, r);
4318 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4319 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4320 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4321 break;
4322 }
4323 case JAVA_THREAD_STATE_TERMINATED : {
4324 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4325 values_h = typeArrayHandle(THREAD, r);
4326 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4327 break;
4328 }
4329 default:
4330 // Unknown state - probably incompatible JDK version
4331 return NULL;
4332 }
4333
4334 return (jintArray) JNIHandles::make_local(env, values_h());
4335 }
4336 JVM_END
4337
4338
4339 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4340 jint javaThreadState,
4341 jintArray values))
4342 {
4343 // If new thread states are added in future JDK and VM versions,
4344 // this should check if the JDK version is compatible with thread
4345 // states supported by the VM. Return NULL if not compatible.
4346 //
4347 // This function must map the VM java_lang_Thread::ThreadStatus
4348 // to the Java thread state that the JDK supports.
4349 //
4350
4351 ResourceMark rm;
4352
4353 // Check if threads is null
4354 if (values == NULL) {
4355 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4356 }
4357
4358 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4359 typeArrayHandle values_h(THREAD, v);
4360
4361 objArrayHandle names_h;
4362 switch (javaThreadState) {
4363 case JAVA_THREAD_STATE_NEW : {
4364 assert(values_h->length() == 1 &&
4365 values_h->int_at(0) == java_lang_Thread::NEW,
4366 "Invalid threadStatus value");
4367
4368 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4369 1, /* only 1 substate */
4370 CHECK_NULL);
4371 names_h = objArrayHandle(THREAD, r);
4372 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4373 names_h->obj_at_put(0, name());
4374 break;
4375 }
4376 case JAVA_THREAD_STATE_RUNNABLE : {
4377 assert(values_h->length() == 1 &&
4378 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4379 "Invalid threadStatus value");
4380
4381 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4382 1, /* only 1 substate */
4383 CHECK_NULL);
4384 names_h = objArrayHandle(THREAD, r);
4385 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4386 names_h->obj_at_put(0, name());
4387 break;
4388 }
4389 case JAVA_THREAD_STATE_BLOCKED : {
4390 assert(values_h->length() == 1 &&
4391 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4392 "Invalid threadStatus value");
4393
4394 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4395 1, /* only 1 substate */
4396 CHECK_NULL);
4397 names_h = objArrayHandle(THREAD, r);
4398 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4399 names_h->obj_at_put(0, name());
4400 break;
4401 }
4402 case JAVA_THREAD_STATE_WAITING : {
4403 assert(values_h->length() == 2 &&
4404 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4405 values_h->int_at(1) == java_lang_Thread::PARKED,
4406 "Invalid threadStatus value");
4407 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4408 2, /* number of substates */
4409 CHECK_NULL);
4410 names_h = objArrayHandle(THREAD, r);
4411 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4412 CHECK_NULL);
4413 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4414 CHECK_NULL);
4415 names_h->obj_at_put(0, name0());
4416 names_h->obj_at_put(1, name1());
4417 break;
4418 }
4419 case JAVA_THREAD_STATE_TIMED_WAITING : {
4420 assert(values_h->length() == 3 &&
4421 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4422 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4423 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4424 "Invalid threadStatus value");
4425 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4426 3, /* number of substates */
4427 CHECK_NULL);
4428 names_h = objArrayHandle(THREAD, r);
4429 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4430 CHECK_NULL);
4431 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4432 CHECK_NULL);
4433 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4434 CHECK_NULL);
4435 names_h->obj_at_put(0, name0());
4436 names_h->obj_at_put(1, name1());
4437 names_h->obj_at_put(2, name2());
4438 break;
4439 }
4440 case JAVA_THREAD_STATE_TERMINATED : {
4441 assert(values_h->length() == 1 &&
4442 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4443 "Invalid threadStatus value");
4444 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4445 1, /* only 1 substate */
4446 CHECK_NULL);
4447 names_h = objArrayHandle(THREAD, r);
4448 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4449 names_h->obj_at_put(0, name());
4450 break;
4451 }
4452 default:
4453 // Unknown state - probably incompatible JDK version
4454 return NULL;
4455 }
4456 return (jobjectArray) JNIHandles::make_local(env, names_h());
4457 }
4458 JVM_END
4459
4460 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4461 {
4462 memset(info, 0, sizeof(info_size));
4463
4464 info->jvm_version = Abstract_VM_Version::jvm_version();
4465 info->update_version = 0; /* 0 in HotSpot Express VM */
4466 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4467
4468 // when we add a new capability in the jvm_version_info struct, we should also
4469 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4470 // counter defined in runtimeService.cpp.
4471 info->is_attachable = AttachListener::is_attach_supported();
4472 #ifdef KERNEL
4473 info->is_kernel_jvm = 1; // true;
4474 #else // KERNEL
4475 info->is_kernel_jvm = 0; // false;
4476 #endif // KERNEL
4477 }
4478 JVM_END