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