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 const int inner_class_info_index = 0;
1305 const int outer_class_info_index = 1;
1306
1307 JvmtiVMObjectAllocEventCollector oam;
1308 // ofClass is a reference to a java_lang_Class object. The mirror object
1309 // of an instanceKlass
1310
1311 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1312 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1313 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1314 return (jobjectArray)JNIHandles::make_local(env, result);
1315 }
1316
1317 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1318
1319 if (k->inner_classes()->length() == 0) {
1320 // Neither an inner nor outer class
1321 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1322 return (jobjectArray)JNIHandles::make_local(env, result);
1323 }
1324
1325 // find inner class info
1326 typeArrayHandle icls(thread, k->inner_classes());
1327 constantPoolHandle cp(thread, k->constants());
1328 int length = icls->length();
1329
1330 // Allocate temp. result array
1331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1332 objArrayHandle result (THREAD, r);
1333 int members = 0;
1334
1335 for(int i = 0; i < length; i += 4) {
1336 int ioff = icls->ushort_at(i + inner_class_info_index);
1337 int ooff = icls->ushort_at(i + outer_class_info_index);
1338
1339 if (ioff != 0 && ooff != 0) {
1340 // Check to see if the name matches the class we're looking for
1341 // before attempting to find the class.
1342 if (cp->klass_name_at_matches(k, ooff)) {
1343 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1344 if (outer_klass == k()) {
1345 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1346 instanceKlassHandle inner_klass (THREAD, ik);
1347
1348 // Throws an exception if outer klass has not declared k as
1349 // an inner klass
1350 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1351
1352 result->obj_at_put(members, inner_klass->java_mirror());
1353 members++;
1354 }
1355 }
1356 }
1357 }
1358
1359 if (members != length) {
1360 // Return array of right length
1361 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1362 for(int i = 0; i < members; i++) {
1363 res->obj_at_put(i, result->obj_at(i));
1364 }
1365 return (jobjectArray)JNIHandles::make_local(env, res);
1366 }
1367
1368 return (jobjectArray)JNIHandles::make_local(env, result());
1369 JVM_END
1370
1371
1372 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1373 {
1374 // ofClass is a reference to a java_lang_Class object.
1375 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1376 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1377 return NULL;
1378 }
1379
1380 bool inner_is_member = false;
1381 klassOop outer_klass
1382 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1383 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1384 if (outer_klass == NULL) return NULL; // already a top-level class
1385 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1386 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1387 }
1388 JVM_END
1389
1390 // should be in instanceKlass.cpp, but is here for historical reasons
1391 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1392 bool* inner_is_member,
1393 TRAPS) {
1394 Thread* thread = THREAD;
1395 const int inner_class_info_index = inner_class_inner_class_info_offset;
1396 const int outer_class_info_index = inner_class_outer_class_info_offset;
1397
1398 if (k->inner_classes()->length() == 0) {
1399 // No inner class info => no declaring class
1400 return NULL;
1401 }
1402
1403 typeArrayHandle i_icls(thread, k->inner_classes());
1404 constantPoolHandle i_cp(thread, k->constants());
1405 int i_length = i_icls->length();
1406
1407 bool found = false;
1408 klassOop ok;
1409 instanceKlassHandle outer_klass;
1410 *inner_is_member = false;
1411
1412 // Find inner_klass attribute
1413 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1414 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1415 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1416 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1417 if (ioff != 0) {
1418 // Check to see if the name matches the class we're looking for
1419 // before attempting to find the class.
1420 if (i_cp->klass_name_at_matches(k, ioff)) {
1421 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1422 found = (k() == inner_klass);
1423 if (found && ooff != 0) {
1424 ok = i_cp->klass_at(ooff, CHECK_NULL);
1425 outer_klass = instanceKlassHandle(thread, ok);
1426 *inner_is_member = true;
1427 }
1428 }
1429 }
1430 }
1431
1432 if (found && outer_klass.is_null()) {
1433 // It may be anonymous; try for that.
1434 int encl_method_class_idx = k->enclosing_method_class_index();
1435 if (encl_method_class_idx != 0) {
1436 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1437 outer_klass = instanceKlassHandle(thread, ok);
1438 *inner_is_member = false;
1439 }
1440 }
1441
1442 // If no inner class attribute found for this class.
1443 if (outer_klass.is_null()) return NULL;
1444
1445 // Throws an exception if outer klass has not declared k as an inner klass
1446 // We need evidence that each klass knows about the other, or else
1447 // the system could allow a spoof of an inner class to gain access rights.
1448 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1449 return outer_klass();
1450 }
1451
1452 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1453 assert (cls != NULL, "illegal class");
1454 JVMWrapper("JVM_GetClassSignature");
1455 JvmtiVMObjectAllocEventCollector oam;
1456 ResourceMark rm(THREAD);
1457 // Return null for arrays and primatives
1458 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1459 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1460 if (Klass::cast(k)->oop_is_instance()) {
1461 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1462 if (sym == NULL) return NULL;
1463 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1464 return (jstring) JNIHandles::make_local(env, str());
1465 }
1466 }
1467 return NULL;
1468 JVM_END
1469
1470
1471 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1472 assert (cls != NULL, "illegal class");
1473 JVMWrapper("JVM_GetClassAnnotations");
1474 ResourceMark rm(THREAD);
1475 // Return null for arrays and primitives
1476 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1477 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1478 if (Klass::cast(k)->oop_is_instance()) {
1479 return (jbyteArray) JNIHandles::make_local(env,
1480 instanceKlass::cast(k)->class_annotations());
1481 }
1482 }
1483 return NULL;
1484 JVM_END
1485
1486
1487 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1488 assert(field != NULL, "illegal field");
1489 JVMWrapper("JVM_GetFieldAnnotations");
1490
1491 // some of this code was adapted from from jni_FromReflectedField
1492
1493 // field is a handle to a java.lang.reflect.Field object
1494 oop reflected = JNIHandles::resolve_non_null(field);
1495 oop mirror = java_lang_reflect_Field::clazz(reflected);
1496 klassOop k = java_lang_Class::as_klassOop(mirror);
1497 int slot = java_lang_reflect_Field::slot(reflected);
1498 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1499
1500 fieldDescriptor fd;
1501 KlassHandle kh(THREAD, k);
1502 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1503
1504 if (modifiers & JVM_ACC_STATIC) {
1505 // for static fields we only look in the current class
1506 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1507 true, &fd)) {
1508 assert(false, "cannot find static field");
1509 return NULL; // robustness
1510 }
1511 } else {
1512 // for instance fields we start with the current class and work
1513 // our way up through the superclass chain
1514 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1515 &fd)) {
1516 assert(false, "cannot find instance field");
1517 return NULL; // robustness
1518 }
1519 }
1520
1521 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1522 JVM_END
1523
1524
1525 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1526 // some of this code was adapted from from jni_FromReflectedMethod
1527
1528 oop reflected = JNIHandles::resolve_non_null(method);
1529 oop mirror = NULL;
1530 int slot = 0;
1531
1532 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1533 mirror = java_lang_reflect_Constructor::clazz(reflected);
1534 slot = java_lang_reflect_Constructor::slot(reflected);
1535 } else {
1536 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1537 "wrong type");
1538 mirror = java_lang_reflect_Method::clazz(reflected);
1539 slot = java_lang_reflect_Method::slot(reflected);
1540 }
1541 klassOop k = java_lang_Class::as_klassOop(mirror);
1542
1543 KlassHandle kh(THREAD, k);
1544 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1545 if (m == NULL) {
1546 assert(false, "cannot find method");
1547 return NULL; // robustness
1548 }
1549
1550 return m;
1551 }
1552
1553
1554 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1555 JVMWrapper("JVM_GetMethodAnnotations");
1556
1557 // method is a handle to a java.lang.reflect.Method object
1558 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1559 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1560 JVM_END
1561
1562
1563 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1564 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1565
1566 // method is a handle to a java.lang.reflect.Method object
1567 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1568 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1569 JVM_END
1570
1571
1572 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1573 JVMWrapper("JVM_GetMethodParameterAnnotations");
1574
1575 // method is a handle to a java.lang.reflect.Method object
1576 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1577 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1578 JVM_END
1579
1580
1581 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1582
1583 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1584 {
1585 JVMWrapper("JVM_GetClassDeclaredFields");
1586 JvmtiVMObjectAllocEventCollector oam;
1587
1588 // Exclude primitive types and array types
1589 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1590 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1591 // Return empty array
1592 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1593 return (jobjectArray) JNIHandles::make_local(env, res);
1594 }
1595
1596 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1597 constantPoolHandle cp(THREAD, k->constants());
1598
1599 // Ensure class is linked
1600 k->link_class(CHECK_NULL);
1601
1602 // 4496456 We need to filter out java.lang.Throwable.backtrace
1603 bool skip_backtrace = false;
1604
1605 // Allocate result
1606 int num_fields;
1607
1608 if (publicOnly) {
1609 num_fields = 0;
1610 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1611 if (fs.access_flags().is_public()) ++num_fields;
1612 }
1613 } else {
1614 num_fields = k->java_fields_count();
1615
1616 if (k() == SystemDictionary::Throwable_klass()) {
1617 num_fields--;
1618 skip_backtrace = true;
1619 }
1620 }
1621
1622 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1623 objArrayHandle result (THREAD, r);
1624
1625 int out_idx = 0;
1626 fieldDescriptor fd;
1627 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1628 if (skip_backtrace) {
1629 // 4496456 skip java.lang.Throwable.backtrace
1630 int offset = fs.offset();
1631 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1632 }
1633
1634 if (!publicOnly || fs.access_flags().is_public()) {
1635 fd.initialize(k(), fs.index());
1636 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1637 result->obj_at_put(out_idx, field);
1638 ++out_idx;
1639 }
1640 }
1641 assert(out_idx == num_fields, "just checking");
1642 return (jobjectArray) JNIHandles::make_local(env, result());
1643 }
1644 JVM_END
1645
1646 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1647 {
1648 JVMWrapper("JVM_GetClassDeclaredMethods");
1649 JvmtiVMObjectAllocEventCollector oam;
1650
1651 // Exclude primitive types and array types
1652 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1653 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1654 // Return empty array
1655 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1656 return (jobjectArray) JNIHandles::make_local(env, res);
1657 }
1658
1659 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1660
1661 // Ensure class is linked
1662 k->link_class(CHECK_NULL);
1663
1664 objArrayHandle methods (THREAD, k->methods());
1665 int methods_length = methods->length();
1666 int num_methods = 0;
1667
1668 int i;
1669 for (i = 0; i < methods_length; i++) {
1670 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1671 if (!method->is_initializer()) {
1672 if (!publicOnly || method->is_public()) {
1673 ++num_methods;
1674 }
1675 }
1676 }
1677
1678 // Allocate result
1679 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1680 objArrayHandle result (THREAD, r);
1681
1682 int out_idx = 0;
1683 for (i = 0; i < methods_length; i++) {
1684 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1685 if (!method->is_initializer()) {
1686 if (!publicOnly || method->is_public()) {
1687 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1688 result->obj_at_put(out_idx, m);
1689 ++out_idx;
1690 }
1691 }
1692 }
1693 assert(out_idx == num_methods, "just checking");
1694 return (jobjectArray) JNIHandles::make_local(env, result());
1695 }
1696 JVM_END
1697
1698 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1699 {
1700 JVMWrapper("JVM_GetClassDeclaredConstructors");
1701 JvmtiVMObjectAllocEventCollector oam;
1702
1703 // Exclude primitive types and array types
1704 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1705 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1706 // Return empty array
1707 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1708 return (jobjectArray) JNIHandles::make_local(env, res);
1709 }
1710
1711 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1712
1713 // Ensure class is linked
1714 k->link_class(CHECK_NULL);
1715
1716 objArrayHandle methods (THREAD, k->methods());
1717 int methods_length = methods->length();
1718 int num_constructors = 0;
1719
1720 int i;
1721 for (i = 0; i < methods_length; i++) {
1722 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1723 if (method->is_initializer() && !method->is_static()) {
1724 if (!publicOnly || method->is_public()) {
1725 ++num_constructors;
1726 }
1727 }
1728 }
1729
1730 // Allocate result
1731 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1732 objArrayHandle result(THREAD, r);
1733
1734 int out_idx = 0;
1735 for (i = 0; i < methods_length; i++) {
1736 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1737 if (method->is_initializer() && !method->is_static()) {
1738 if (!publicOnly || method->is_public()) {
1739 oop m = Reflection::new_constructor(method, CHECK_NULL);
1740 result->obj_at_put(out_idx, m);
1741 ++out_idx;
1742 }
1743 }
1744 }
1745 assert(out_idx == num_constructors, "just checking");
1746 return (jobjectArray) JNIHandles::make_local(env, result());
1747 }
1748 JVM_END
1749
1750 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1751 {
1752 JVMWrapper("JVM_GetClassAccessFlags");
1753 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1754 // Primitive type
1755 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1756 }
1757
1758 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1759 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1760 }
1761 JVM_END
1762
1763
1764 // Constant pool access //////////////////////////////////////////////////////////
1765
1766 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1767 {
1768 JVMWrapper("JVM_GetClassConstantPool");
1769 JvmtiVMObjectAllocEventCollector oam;
1770
1771 // Return null for primitives and arrays
1772 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1773 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1774 if (Klass::cast(k)->oop_is_instance()) {
1775 instanceKlassHandle k_h(THREAD, k);
1776 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1777 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1778 return JNIHandles::make_local(jcp());
1779 }
1780 }
1781 return NULL;
1782 }
1783 JVM_END
1784
1785
1786 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1787 {
1788 JVMWrapper("JVM_ConstantPoolGetSize");
1789 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1790 return cp->length();
1791 }
1792 JVM_END
1793
1794
1795 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1796 if (!cp->is_within_bounds(index)) {
1797 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1798 }
1799 }
1800
1801
1802 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1803 {
1804 JVMWrapper("JVM_ConstantPoolGetClassAt");
1805 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1806 bounds_check(cp, index, CHECK_NULL);
1807 constantTag tag = cp->tag_at(index);
1808 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1809 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1810 }
1811 klassOop k = cp->klass_at(index, CHECK_NULL);
1812 return (jclass) JNIHandles::make_local(k->java_mirror());
1813 }
1814 JVM_END
1815
1816
1817 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1818 {
1819 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1820 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1821 bounds_check(cp, index, CHECK_NULL);
1822 constantTag tag = cp->tag_at(index);
1823 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1824 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1825 }
1826 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1827 if (k == NULL) return NULL;
1828 return (jclass) JNIHandles::make_local(k->java_mirror());
1829 }
1830 JVM_END
1831
1832 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1833 constantTag tag = cp->tag_at(index);
1834 if (!tag.is_method() && !tag.is_interface_method()) {
1835 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1836 }
1837 int klass_ref = cp->uncached_klass_ref_index_at(index);
1838 klassOop k_o;
1839 if (force_resolution) {
1840 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1841 } else {
1842 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1843 if (k_o == NULL) return NULL;
1844 }
1845 instanceKlassHandle k(THREAD, k_o);
1846 Symbol* name = cp->uncached_name_ref_at(index);
1847 Symbol* sig = cp->uncached_signature_ref_at(index);
1848 methodHandle m (THREAD, k->find_method(name, sig));
1849 if (m.is_null()) {
1850 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1851 }
1852 oop method;
1853 if (!m->is_initializer() || m->is_static()) {
1854 method = Reflection::new_method(m, true, true, CHECK_NULL);
1855 } else {
1856 method = Reflection::new_constructor(m, CHECK_NULL);
1857 }
1858 return JNIHandles::make_local(method);
1859 }
1860
1861 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1862 {
1863 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1864 JvmtiVMObjectAllocEventCollector oam;
1865 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1866 bounds_check(cp, index, CHECK_NULL);
1867 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1868 return res;
1869 }
1870 JVM_END
1871
1872 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1873 {
1874 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1875 JvmtiVMObjectAllocEventCollector oam;
1876 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1877 bounds_check(cp, index, CHECK_NULL);
1878 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1879 return res;
1880 }
1881 JVM_END
1882
1883 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1884 constantTag tag = cp->tag_at(index);
1885 if (!tag.is_field()) {
1886 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1887 }
1888 int klass_ref = cp->uncached_klass_ref_index_at(index);
1889 klassOop k_o;
1890 if (force_resolution) {
1891 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1892 } else {
1893 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1894 if (k_o == NULL) return NULL;
1895 }
1896 instanceKlassHandle k(THREAD, k_o);
1897 Symbol* name = cp->uncached_name_ref_at(index);
1898 Symbol* sig = cp->uncached_signature_ref_at(index);
1899 fieldDescriptor fd;
1900 klassOop target_klass = k->find_field(name, sig, &fd);
1901 if (target_klass == NULL) {
1902 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1903 }
1904 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1905 return JNIHandles::make_local(field);
1906 }
1907
1908 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1909 {
1910 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1911 JvmtiVMObjectAllocEventCollector oam;
1912 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1913 bounds_check(cp, index, CHECK_NULL);
1914 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1915 return res;
1916 }
1917 JVM_END
1918
1919 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1920 {
1921 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1922 JvmtiVMObjectAllocEventCollector oam;
1923 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1924 bounds_check(cp, index, CHECK_NULL);
1925 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1926 return res;
1927 }
1928 JVM_END
1929
1930 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1931 {
1932 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1933 JvmtiVMObjectAllocEventCollector oam;
1934 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1935 bounds_check(cp, index, CHECK_NULL);
1936 constantTag tag = cp->tag_at(index);
1937 if (!tag.is_field_or_method()) {
1938 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1939 }
1940 int klass_ref = cp->uncached_klass_ref_index_at(index);
1941 Symbol* klass_name = cp->klass_name_at(klass_ref);
1942 Symbol* member_name = cp->uncached_name_ref_at(index);
1943 Symbol* member_sig = cp->uncached_signature_ref_at(index);
1944 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
1945 objArrayHandle dest(THREAD, dest_o);
1946 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1947 dest->obj_at_put(0, str());
1948 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1949 dest->obj_at_put(1, str());
1950 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1951 dest->obj_at_put(2, str());
1952 return (jobjectArray) JNIHandles::make_local(dest());
1953 }
1954 JVM_END
1955
1956 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1957 {
1958 JVMWrapper("JVM_ConstantPoolGetIntAt");
1959 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1960 bounds_check(cp, index, CHECK_0);
1961 constantTag tag = cp->tag_at(index);
1962 if (!tag.is_int()) {
1963 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1964 }
1965 return cp->int_at(index);
1966 }
1967 JVM_END
1968
1969 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1970 {
1971 JVMWrapper("JVM_ConstantPoolGetLongAt");
1972 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1973 bounds_check(cp, index, CHECK_(0L));
1974 constantTag tag = cp->tag_at(index);
1975 if (!tag.is_long()) {
1976 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1977 }
1978 return cp->long_at(index);
1979 }
1980 JVM_END
1981
1982 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1983 {
1984 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1985 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1986 bounds_check(cp, index, CHECK_(0.0f));
1987 constantTag tag = cp->tag_at(index);
1988 if (!tag.is_float()) {
1989 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1990 }
1991 return cp->float_at(index);
1992 }
1993 JVM_END
1994
1995 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1996 {
1997 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1998 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1999 bounds_check(cp, index, CHECK_(0.0));
2000 constantTag tag = cp->tag_at(index);
2001 if (!tag.is_double()) {
2002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 }
2004 return cp->double_at(index);
2005 }
2006 JVM_END
2007
2008 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2009 {
2010 JVMWrapper("JVM_ConstantPoolGetStringAt");
2011 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2012 bounds_check(cp, index, CHECK_NULL);
2013 constantTag tag = cp->tag_at(index);
2014 if (!tag.is_string() && !tag.is_unresolved_string()) {
2015 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2016 }
2017 oop str = cp->string_at(index, CHECK_NULL);
2018 return (jstring) JNIHandles::make_local(str);
2019 }
2020 JVM_END
2021
2022 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2023 {
2024 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2025 JvmtiVMObjectAllocEventCollector oam;
2026 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2027 bounds_check(cp, index, CHECK_NULL);
2028 constantTag tag = cp->tag_at(index);
2029 if (!tag.is_symbol()) {
2030 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2031 }
2032 Symbol* sym = cp->symbol_at(index);
2033 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2034 return (jstring) JNIHandles::make_local(str());
2035 }
2036 JVM_END
2037
2038
2039 // Assertion support. //////////////////////////////////////////////////////////
2040
2041 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2042 JVMWrapper("JVM_DesiredAssertionStatus");
2043 assert(cls != NULL, "bad class");
2044
2045 oop r = JNIHandles::resolve(cls);
2046 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2047 if (java_lang_Class::is_primitive(r)) return false;
2048
2049 klassOop k = java_lang_Class::as_klassOop(r);
2050 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2051 if (! Klass::cast(k)->oop_is_instance()) return false;
2052
2053 ResourceMark rm(THREAD);
2054 const char* name = Klass::cast(k)->name()->as_C_string();
2055 bool system_class = Klass::cast(k)->class_loader() == NULL;
2056 return JavaAssertions::enabled(name, system_class);
2057
2058 JVM_END
2059
2060
2061 // Return a new AssertionStatusDirectives object with the fields filled in with
2062 // command-line assertion arguments (i.e., -ea, -da).
2063 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2064 JVMWrapper("JVM_AssertionStatusDirectives");
2065 JvmtiVMObjectAllocEventCollector oam;
2066 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2067 return JNIHandles::make_local(env, asd);
2068 JVM_END
2069
2070 // Verification ////////////////////////////////////////////////////////////////////////////////
2071
2072 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2073
2074 // RedefineClasses support: bug 6214132 caused verification to fail.
2075 // All functions from this section should call the jvmtiThreadSate function:
2076 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2077 // The function returns a klassOop of the _scratch_class if the verifier
2078 // was invoked in the middle of the class redefinition.
2079 // Otherwise it returns its argument value which is the _the_class klassOop.
2080 // Please, refer to the description in the jvmtiThreadSate.hpp.
2081
2082 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2083 JVMWrapper("JVM_GetClassNameUTF");
2084 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2085 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2086 return Klass::cast(k)->name()->as_utf8();
2087 JVM_END
2088
2089
2090 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2091 JVMWrapper("JVM_GetClassCPTypes");
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2094 // types will have length zero if this is not an instanceKlass
2095 // (length is determined by call to JVM_GetClassCPEntriesCount)
2096 if (Klass::cast(k)->oop_is_instance()) {
2097 constantPoolOop cp = instanceKlass::cast(k)->constants();
2098 for (int index = cp->length() - 1; index >= 0; index--) {
2099 constantTag tag = cp->tag_at(index);
2100 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2101 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2102 }
2103 }
2104 JVM_END
2105
2106
2107 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2108 JVMWrapper("JVM_GetClassCPEntriesCount");
2109 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2110 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2111 if (!Klass::cast(k)->oop_is_instance())
2112 return 0;
2113 return instanceKlass::cast(k)->constants()->length();
2114 JVM_END
2115
2116
2117 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2118 JVMWrapper("JVM_GetClassFieldsCount");
2119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2120 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2121 if (!Klass::cast(k)->oop_is_instance())
2122 return 0;
2123 return instanceKlass::cast(k)->java_fields_count();
2124 JVM_END
2125
2126
2127 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2128 JVMWrapper("JVM_GetClassMethodsCount");
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2131 if (!Klass::cast(k)->oop_is_instance())
2132 return 0;
2133 return instanceKlass::cast(k)->methods()->length();
2134 JVM_END
2135
2136
2137 // The following methods, used for the verifier, are never called with
2138 // array klasses, so a direct cast to instanceKlass is safe.
2139 // Typically, these methods are called in a loop with bounds determined
2140 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2141 // zero for arrays.
2142 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2143 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2144 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2145 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2146 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2147 int length = methodOop(method)->checked_exceptions_length();
2148 if (length > 0) {
2149 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2150 for (int i = 0; i < length; i++) {
2151 exceptions[i] = table[i].class_cp_index;
2152 }
2153 }
2154 JVM_END
2155
2156
2157 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2158 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2159 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2160 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2161 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2162 return methodOop(method)->checked_exceptions_length();
2163 JVM_END
2164
2165
2166 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2167 JVMWrapper("JVM_GetMethodIxByteCode");
2168 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2169 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2170 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2171 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2172 JVM_END
2173
2174
2175 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2176 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2177 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2178 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2179 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2180 return methodOop(method)->code_size();
2181 JVM_END
2182
2183
2184 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2185 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2187 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2188 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2189 typeArrayOop extable = methodOop(method)->exception_table();
2190 entry->start_pc = extable->int_at(entry_index * 4);
2191 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2192 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2193 entry->catchType = extable->int_at(entry_index * 4 + 3);
2194 JVM_END
2195
2196
2197 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2198 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2199 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2200 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2201 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2202 return methodOop(method)->exception_table()->length() / 4;
2203 JVM_END
2204
2205
2206 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2207 JVMWrapper("JVM_GetMethodIxModifiers");
2208 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2209 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2210 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2211 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2212 JVM_END
2213
2214
2215 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2216 JVMWrapper("JVM_GetFieldIxModifiers");
2217 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2218 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2219 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2220 JVM_END
2221
2222
2223 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2224 JVMWrapper("JVM_GetMethodIxLocalsCount");
2225 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2226 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2227 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2228 return methodOop(method)->max_locals();
2229 JVM_END
2230
2231
2232 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2233 JVMWrapper("JVM_GetMethodIxArgsSize");
2234 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2235 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2236 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2237 return methodOop(method)->size_of_parameters();
2238 JVM_END
2239
2240
2241 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2242 JVMWrapper("JVM_GetMethodIxMaxStack");
2243 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2244 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2245 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2246 return methodOop(method)->max_stack();
2247 JVM_END
2248
2249
2250 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2251 JVMWrapper("JVM_IsConstructorIx");
2252 ResourceMark rm(THREAD);
2253 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2255 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2256 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2257 JVM_END
2258
2259
2260 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2261 JVMWrapper("JVM_GetMethodIxIxUTF");
2262 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2265 return methodOop(method)->name()->as_utf8();
2266 JVM_END
2267
2268
2269 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2270 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2271 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2272 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2273 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2274 return methodOop(method)->signature()->as_utf8();
2275 JVM_END
2276
2277 /**
2278 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2279 * read entries in the constant pool. Since the old verifier always
2280 * works on a copy of the code, it will not see any rewriting that
2281 * may possibly occur in the middle of verification. So it is important
2282 * that nothing it calls tries to use the cpCache instead of the raw
2283 * constant pool, so we must use cp->uncached_x methods when appropriate.
2284 */
2285 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2286 JVMWrapper("JVM_GetCPFieldNameUTF");
2287 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2289 constantPoolOop cp = instanceKlass::cast(k)->constants();
2290 switch (cp->tag_at(cp_index).value()) {
2291 case JVM_CONSTANT_Fieldref:
2292 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2293 default:
2294 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2295 }
2296 ShouldNotReachHere();
2297 return NULL;
2298 JVM_END
2299
2300
2301 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2302 JVMWrapper("JVM_GetCPMethodNameUTF");
2303 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 constantPoolOop cp = instanceKlass::cast(k)->constants();
2306 switch (cp->tag_at(cp_index).value()) {
2307 case JVM_CONSTANT_InterfaceMethodref:
2308 case JVM_CONSTANT_Methodref:
2309 case JVM_CONSTANT_NameAndType: // for invokedynamic
2310 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2311 default:
2312 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2313 }
2314 ShouldNotReachHere();
2315 return NULL;
2316 JVM_END
2317
2318
2319 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2320 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2321 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 constantPoolOop cp = instanceKlass::cast(k)->constants();
2324 switch (cp->tag_at(cp_index).value()) {
2325 case JVM_CONSTANT_InterfaceMethodref:
2326 case JVM_CONSTANT_Methodref:
2327 case JVM_CONSTANT_NameAndType: // for invokedynamic
2328 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2329 default:
2330 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2331 }
2332 ShouldNotReachHere();
2333 return NULL;
2334 JVM_END
2335
2336
2337 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2338 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 constantPoolOop cp = instanceKlass::cast(k)->constants();
2342 switch (cp->tag_at(cp_index).value()) {
2343 case JVM_CONSTANT_Fieldref:
2344 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2345 default:
2346 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2347 }
2348 ShouldNotReachHere();
2349 return NULL;
2350 JVM_END
2351
2352
2353 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2354 JVMWrapper("JVM_GetCPClassNameUTF");
2355 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2357 constantPoolOop cp = instanceKlass::cast(k)->constants();
2358 Symbol* classname = cp->klass_name_at(cp_index);
2359 return classname->as_utf8();
2360 JVM_END
2361
2362
2363 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2364 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2365 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 constantPoolOop cp = instanceKlass::cast(k)->constants();
2368 switch (cp->tag_at(cp_index).value()) {
2369 case JVM_CONSTANT_Fieldref: {
2370 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2371 Symbol* classname = cp->klass_name_at(class_index);
2372 return classname->as_utf8();
2373 }
2374 default:
2375 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2376 }
2377 ShouldNotReachHere();
2378 return NULL;
2379 JVM_END
2380
2381
2382 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2383 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2384 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 constantPoolOop cp = instanceKlass::cast(k)->constants();
2387 switch (cp->tag_at(cp_index).value()) {
2388 case JVM_CONSTANT_Methodref:
2389 case JVM_CONSTANT_InterfaceMethodref: {
2390 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2391 Symbol* classname = cp->klass_name_at(class_index);
2392 return classname->as_utf8();
2393 }
2394 default:
2395 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2396 }
2397 ShouldNotReachHere();
2398 return NULL;
2399 JVM_END
2400
2401
2402 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2403 JVMWrapper("JVM_GetCPFieldModifiers");
2404 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2405 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2408 constantPoolOop cp = instanceKlass::cast(k)->constants();
2409 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2410 switch (cp->tag_at(cp_index).value()) {
2411 case JVM_CONSTANT_Fieldref: {
2412 Symbol* name = cp->uncached_name_ref_at(cp_index);
2413 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2414 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2415 if (fs.name() == name && fs.signature() == signature) {
2416 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2417 }
2418 }
2419 return -1;
2420 }
2421 default:
2422 fatal("JVM_GetCPFieldModifiers: illegal constant");
2423 }
2424 ShouldNotReachHere();
2425 return 0;
2426 JVM_END
2427
2428
2429 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2430 JVMWrapper("JVM_GetCPMethodModifiers");
2431 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2432 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2435 constantPoolOop cp = instanceKlass::cast(k)->constants();
2436 switch (cp->tag_at(cp_index).value()) {
2437 case JVM_CONSTANT_Methodref:
2438 case JVM_CONSTANT_InterfaceMethodref: {
2439 Symbol* name = cp->uncached_name_ref_at(cp_index);
2440 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2441 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2442 int methods_count = methods->length();
2443 for (int i = 0; i < methods_count; i++) {
2444 methodOop method = methodOop(methods->obj_at(i));
2445 if (method->name() == name && method->signature() == signature) {
2446 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2447 }
2448 }
2449 return -1;
2450 }
2451 default:
2452 fatal("JVM_GetCPMethodModifiers: illegal constant");
2453 }
2454 ShouldNotReachHere();
2455 return 0;
2456 JVM_END
2457
2458
2459 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2460
2461 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2462 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2463 JVM_END
2464
2465
2466 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2467 JVMWrapper("JVM_IsSameClassPackage");
2468 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2469 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2470 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2471 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2472 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2473 JVM_END
2474
2475
2476 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2477
2478 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2479 JVMWrapper2("JVM_Open (%s)", fname);
2480
2481 //%note jvm_r6
2482 int result = os::open(fname, flags, mode);
2483 if (result >= 0) {
2484 return result;
2485 } else {
2486 switch(errno) {
2487 case EEXIST:
2488 return JVM_EEXIST;
2489 default:
2490 return -1;
2491 }
2492 }
2493 JVM_END
2494
2495
2496 JVM_LEAF(jint, JVM_Close(jint fd))
2497 JVMWrapper2("JVM_Close (0x%x)", fd);
2498 //%note jvm_r6
2499 return os::close(fd);
2500 JVM_END
2501
2502
2503 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2504 JVMWrapper2("JVM_Read (0x%x)", fd);
2505
2506 //%note jvm_r6
2507 return (jint)os::restartable_read(fd, buf, nbytes);
2508 JVM_END
2509
2510
2511 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2512 JVMWrapper2("JVM_Write (0x%x)", fd);
2513
2514 //%note jvm_r6
2515 return (jint)os::write(fd, buf, nbytes);
2516 JVM_END
2517
2518
2519 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2520 JVMWrapper2("JVM_Available (0x%x)", fd);
2521 //%note jvm_r6
2522 return os::available(fd, pbytes);
2523 JVM_END
2524
2525
2526 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2527 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2528 //%note jvm_r6
2529 return os::lseek(fd, offset, whence);
2530 JVM_END
2531
2532
2533 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2534 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2535 return os::ftruncate(fd, length);
2536 JVM_END
2537
2538
2539 JVM_LEAF(jint, JVM_Sync(jint fd))
2540 JVMWrapper2("JVM_Sync (0x%x)", fd);
2541 //%note jvm_r6
2542 return os::fsync(fd);
2543 JVM_END
2544
2545
2546 // Printing support //////////////////////////////////////////////////
2547 extern "C" {
2548
2549 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2550 // see bug 4399518, 4417214
2551 if ((intptr_t)count <= 0) return -1;
2552 return vsnprintf(str, count, fmt, args);
2553 }
2554
2555
2556 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2557 va_list args;
2558 int len;
2559 va_start(args, fmt);
2560 len = jio_vsnprintf(str, count, fmt, args);
2561 va_end(args);
2562 return len;
2563 }
2564
2565
2566 int jio_fprintf(FILE* f, const char *fmt, ...) {
2567 int len;
2568 va_list args;
2569 va_start(args, fmt);
2570 len = jio_vfprintf(f, fmt, args);
2571 va_end(args);
2572 return len;
2573 }
2574
2575
2576 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2577 if (Arguments::vfprintf_hook() != NULL) {
2578 return Arguments::vfprintf_hook()(f, fmt, args);
2579 } else {
2580 return vfprintf(f, fmt, args);
2581 }
2582 }
2583
2584
2585 JNIEXPORT int jio_printf(const char *fmt, ...) {
2586 int len;
2587 va_list args;
2588 va_start(args, fmt);
2589 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2590 va_end(args);
2591 return len;
2592 }
2593
2594
2595 // HotSpot specific jio method
2596 void jio_print(const char* s) {
2597 // Try to make this function as atomic as possible.
2598 if (Arguments::vfprintf_hook() != NULL) {
2599 jio_fprintf(defaultStream::output_stream(), "%s", s);
2600 } else {
2601 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2602 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2603 }
2604 }
2605
2606 } // Extern C
2607
2608 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2609
2610 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2611 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2612 // OSThread objects. The exception to this rule is when the target object is the thread
2613 // doing the operation, in which case we know that the thread won't exit until the
2614 // operation is done (all exits being voluntary). There are a few cases where it is
2615 // rather silly to do operations on yourself, like resuming yourself or asking whether
2616 // you are alive. While these can still happen, they are not subject to deadlocks if
2617 // the lock is held while the operation occurs (this is not the case for suspend, for
2618 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2619 // implementation is local to this file, we always lock Threads_lock for that one.
2620
2621 static void thread_entry(JavaThread* thread, TRAPS) {
2622 HandleMark hm(THREAD);
2623 Handle obj(THREAD, thread->threadObj());
2624 JavaValue result(T_VOID);
2625 JavaCalls::call_virtual(&result,
2626 obj,
2627 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2628 vmSymbols::run_method_name(),
2629 vmSymbols::void_method_signature(),
2630 THREAD);
2631 }
2632
2633
2634 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2635 JVMWrapper("JVM_StartThread");
2636 JavaThread *native_thread = NULL;
2637
2638 // We cannot hold the Threads_lock when we throw an exception,
2639 // due to rank ordering issues. Example: we might need to grab the
2640 // Heap_lock while we construct the exception.
2641 bool throw_illegal_thread_state = false;
2642
2643 // We must release the Threads_lock before we can post a jvmti event
2644 // in Thread::start.
2645 {
2646 // Ensure that the C++ Thread and OSThread structures aren't freed before
2647 // we operate.
2648 MutexLocker mu(Threads_lock);
2649
2650 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2651 // re-starting an already started thread, so we should usually find
2652 // that the JavaThread is null. However for a JNI attached thread
2653 // there is a small window between the Thread object being created
2654 // (with its JavaThread set) and the update to its threadStatus, so we
2655 // have to check for this
2656 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2657 throw_illegal_thread_state = true;
2658 } else {
2659 // We could also check the stillborn flag to see if this thread was already stopped, but
2660 // for historical reasons we let the thread detect that itself when it starts running
2661
2662 jlong size =
2663 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2664 // Allocate the C++ Thread structure and create the native thread. The
2665 // stack size retrieved from java is signed, but the constructor takes
2666 // size_t (an unsigned type), so avoid passing negative values which would
2667 // result in really large stacks.
2668 size_t sz = size > 0 ? (size_t) size : 0;
2669 native_thread = new JavaThread(&thread_entry, sz);
2670
2671 // At this point it may be possible that no osthread was created for the
2672 // JavaThread due to lack of memory. Check for this situation and throw
2673 // an exception if necessary. Eventually we may want to change this so
2674 // that we only grab the lock if the thread was created successfully -
2675 // then we can also do this check and throw the exception in the
2676 // JavaThread constructor.
2677 if (native_thread->osthread() != NULL) {
2678 // Note: the current thread is not being used within "prepare".
2679 native_thread->prepare(jthread);
2680 }
2681 }
2682 }
2683
2684 if (throw_illegal_thread_state) {
2685 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2686 }
2687
2688 assert(native_thread != NULL, "Starting null thread?");
2689
2690 if (native_thread->osthread() == NULL) {
2691 // No one should hold a reference to the 'native_thread'.
2692 delete native_thread;
2693 if (JvmtiExport::should_post_resource_exhausted()) {
2694 JvmtiExport::post_resource_exhausted(
2695 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2696 "unable to create new native thread");
2697 }
2698 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2699 "unable to create new native thread");
2700 }
2701
2702 Thread::start(native_thread);
2703
2704 JVM_END
2705
2706 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2707 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2708 // but is thought to be reliable and simple. In the case, where the receiver is the
2709 // same thread as the sender, no safepoint is needed.
2710 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2711 JVMWrapper("JVM_StopThread");
2712
2713 oop java_throwable = JNIHandles::resolve(throwable);
2714 if (java_throwable == NULL) {
2715 THROW(vmSymbols::java_lang_NullPointerException());
2716 }
2717 oop java_thread = JNIHandles::resolve_non_null(jthread);
2718 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2719 Events::log_exception(JavaThread::current(),
2720 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2721 receiver, (address)java_thread, throwable);
2722 // First check if thread is alive
2723 if (receiver != NULL) {
2724 // Check if exception is getting thrown at self (use oop equality, since the
2725 // target object might exit)
2726 if (java_thread == thread->threadObj()) {
2727 THROW_OOP(java_throwable);
2728 } else {
2729 // Enques a VM_Operation to stop all threads and then deliver the exception...
2730 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2731 }
2732 }
2733 else {
2734 // Either:
2735 // - target thread has not been started before being stopped, or
2736 // - target thread already terminated
2737 // We could read the threadStatus to determine which case it is
2738 // but that is overkill as it doesn't matter. We must set the
2739 // stillborn flag for the first case, and if the thread has already
2740 // exited setting this flag has no affect
2741 java_lang_Thread::set_stillborn(java_thread);
2742 }
2743 JVM_END
2744
2745
2746 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2747 JVMWrapper("JVM_IsThreadAlive");
2748
2749 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2750 return java_lang_Thread::is_alive(thread_oop);
2751 JVM_END
2752
2753
2754 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2755 JVMWrapper("JVM_SuspendThread");
2756 oop java_thread = JNIHandles::resolve_non_null(jthread);
2757 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2758
2759 if (receiver != NULL) {
2760 // thread has run and has not exited (still on threads list)
2761
2762 {
2763 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2764 if (receiver->is_external_suspend()) {
2765 // Don't allow nested external suspend requests. We can't return
2766 // an error from this interface so just ignore the problem.
2767 return;
2768 }
2769 if (receiver->is_exiting()) { // thread is in the process of exiting
2770 return;
2771 }
2772 receiver->set_external_suspend();
2773 }
2774
2775 // java_suspend() will catch threads in the process of exiting
2776 // and will ignore them.
2777 receiver->java_suspend();
2778
2779 // It would be nice to have the following assertion in all the
2780 // time, but it is possible for a racing resume request to have
2781 // resumed this thread right after we suspended it. Temporarily
2782 // enable this assertion if you are chasing a different kind of
2783 // bug.
2784 //
2785 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2786 // receiver->is_being_ext_suspended(), "thread is not suspended");
2787 }
2788 JVM_END
2789
2790
2791 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2792 JVMWrapper("JVM_ResumeThread");
2793 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2794 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2795 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2796 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2797 // looks at it.
2798 MutexLocker ml(Threads_lock);
2799 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2800 if (thr != NULL) {
2801 // the thread has run and is not in the process of exiting
2802 thr->java_resume();
2803 }
2804 JVM_END
2805
2806
2807 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2808 JVMWrapper("JVM_SetThreadPriority");
2809 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2810 MutexLocker ml(Threads_lock);
2811 oop java_thread = JNIHandles::resolve_non_null(jthread);
2812 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2813 JavaThread* thr = java_lang_Thread::thread(java_thread);
2814 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2815 Thread::set_priority(thr, (ThreadPriority)prio);
2816 }
2817 JVM_END
2818
2819
2820 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2821 JVMWrapper("JVM_Yield");
2822 if (os::dont_yield()) return;
2823 #ifndef USDT2
2824 HS_DTRACE_PROBE0(hotspot, thread__yield);
2825 #else /* USDT2 */
2826 HOTSPOT_THREAD_YIELD();
2827 #endif /* USDT2 */
2828 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2829 // Critical for similar threading behaviour
2830 if (ConvertYieldToSleep) {
2831 os::sleep(thread, MinSleepInterval, false);
2832 } else {
2833 os::yield();
2834 }
2835 JVM_END
2836
2837
2838 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2839 JVMWrapper("JVM_Sleep");
2840
2841 if (millis < 0) {
2842 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2843 }
2844
2845 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2846 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2847 }
2848
2849 // Save current thread state and restore it at the end of this block.
2850 // And set new thread state to SLEEPING.
2851 JavaThreadSleepState jtss(thread);
2852
2853 #ifndef USDT2
2854 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2855 #else /* USDT2 */
2856 HOTSPOT_THREAD_SLEEP_BEGIN(
2857 millis);
2858 #endif /* USDT2 */
2859
2860 if (millis == 0) {
2861 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2862 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2863 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2864 // for SOLARIS
2865 if (ConvertSleepToYield) {
2866 os::yield();
2867 } else {
2868 ThreadState old_state = thread->osthread()->get_state();
2869 thread->osthread()->set_state(SLEEPING);
2870 os::sleep(thread, MinSleepInterval, false);
2871 thread->osthread()->set_state(old_state);
2872 }
2873 } else {
2874 ThreadState old_state = thread->osthread()->get_state();
2875 thread->osthread()->set_state(SLEEPING);
2876 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2877 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2878 // us while we were sleeping. We do not overwrite those.
2879 if (!HAS_PENDING_EXCEPTION) {
2880 #ifndef USDT2
2881 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2882 #else /* USDT2 */
2883 HOTSPOT_THREAD_SLEEP_END(
2884 1);
2885 #endif /* USDT2 */
2886 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2887 // to properly restore the thread state. That's likely wrong.
2888 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2889 }
2890 }
2891 thread->osthread()->set_state(old_state);
2892 }
2893 #ifndef USDT2
2894 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2895 #else /* USDT2 */
2896 HOTSPOT_THREAD_SLEEP_END(
2897 0);
2898 #endif /* USDT2 */
2899 JVM_END
2900
2901 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2902 JVMWrapper("JVM_CurrentThread");
2903 oop jthread = thread->threadObj();
2904 assert (thread != NULL, "no current thread!");
2905 return JNIHandles::make_local(env, jthread);
2906 JVM_END
2907
2908
2909 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2910 JVMWrapper("JVM_CountStackFrames");
2911
2912 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2913 oop java_thread = JNIHandles::resolve_non_null(jthread);
2914 bool throw_illegal_thread_state = false;
2915 int count = 0;
2916
2917 {
2918 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2919 // We need to re-resolve the java_thread, since a GC might have happened during the
2920 // acquire of the lock
2921 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2922
2923 if (thr == NULL) {
2924 // do nothing
2925 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2926 // Check whether this java thread has been suspended already. If not, throws
2927 // IllegalThreadStateException. We defer to throw that exception until
2928 // Threads_lock is released since loading exception class has to leave VM.
2929 // The correct way to test a thread is actually suspended is
2930 // wait_for_ext_suspend_completion(), but we can't call that while holding
2931 // the Threads_lock. The above tests are sufficient for our purposes
2932 // provided the walkability of the stack is stable - which it isn't
2933 // 100% but close enough for most practical purposes.
2934 throw_illegal_thread_state = true;
2935 } else {
2936 // Count all java activation, i.e., number of vframes
2937 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2938 // Native frames are not counted
2939 if (!vfst.method()->is_native()) count++;
2940 }
2941 }
2942 }
2943
2944 if (throw_illegal_thread_state) {
2945 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2946 "this thread is not suspended");
2947 }
2948 return count;
2949 JVM_END
2950
2951 // Consider: A better way to implement JVM_Interrupt() is to acquire
2952 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2953 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2954 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2955 // outside the critical section. Threads_lock is hot so we want to minimize
2956 // the hold-time. A cleaner interface would be to decompose interrupt into
2957 // two steps. The 1st phase, performed under Threads_lock, would return
2958 // a closure that'd be invoked after Threads_lock was dropped.
2959 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2960 // admit spurious wakeups.
2961
2962 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2963 JVMWrapper("JVM_Interrupt");
2964
2965 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2966 oop java_thread = JNIHandles::resolve_non_null(jthread);
2967 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2968 // We need to re-resolve the java_thread, since a GC might have happened during the
2969 // acquire of the lock
2970 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2971 if (thr != NULL) {
2972 Thread::interrupt(thr);
2973 }
2974 JVM_END
2975
2976
2977 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2978 JVMWrapper("JVM_IsInterrupted");
2979
2980 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2981 oop java_thread = JNIHandles::resolve_non_null(jthread);
2982 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2983 // We need to re-resolve the java_thread, since a GC might have happened during the
2984 // acquire of the lock
2985 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2986 if (thr == NULL) {
2987 return JNI_FALSE;
2988 } else {
2989 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2990 }
2991 JVM_END
2992
2993
2994 // Return true iff the current thread has locked the object passed in
2995
2996 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2997 JVMWrapper("JVM_HoldsLock");
2998 assert(THREAD->is_Java_thread(), "sanity check");
2999 if (obj == NULL) {
3000 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3001 }
3002 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3003 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3004 JVM_END
3005
3006
3007 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3008 JVMWrapper("JVM_DumpAllStacks");
3009 VM_PrintThreads op;
3010 VMThread::execute(&op);
3011 if (JvmtiExport::should_post_data_dump()) {
3012 JvmtiExport::post_data_dump();
3013 }
3014 JVM_END
3015
3016 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3017 JVMWrapper("JVM_SetNativeThreadName");
3018 ResourceMark rm(THREAD);
3019 oop java_thread = JNIHandles::resolve_non_null(jthread);
3020 JavaThread* thr = java_lang_Thread::thread(java_thread);
3021 // Thread naming only supported for the current thread, doesn't work for
3022 // target threads.
3023 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3024 // we don't set the name of an attached thread to avoid stepping
3025 // on other programs
3026 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3027 os::set_native_thread_name(thread_name);
3028 }
3029 JVM_END
3030
3031 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3032
3033 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3034 assert(jthread->is_Java_thread(), "must be a Java thread");
3035 if (jthread->privileged_stack_top() == NULL) return false;
3036 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3037 oop loader = jthread->privileged_stack_top()->class_loader();
3038 if (loader == NULL) return true;
3039 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3040 if (trusted) return true;
3041 }
3042 return false;
3043 }
3044
3045 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3046 JVMWrapper("JVM_CurrentLoadedClass");
3047 ResourceMark rm(THREAD);
3048
3049 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3050 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3051 bool trusted = is_trusted_frame(thread, &vfst);
3052 if (trusted) return NULL;
3053
3054 methodOop m = vfst.method();
3055 if (!m->is_native()) {
3056 klassOop holder = m->method_holder();
3057 oop loader = instanceKlass::cast(holder)->class_loader();
3058 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3059 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3060 }
3061 }
3062 }
3063 return NULL;
3064 JVM_END
3065
3066
3067 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3068 JVMWrapper("JVM_CurrentClassLoader");
3069 ResourceMark rm(THREAD);
3070
3071 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3072
3073 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3074 bool trusted = is_trusted_frame(thread, &vfst);
3075 if (trusted) return NULL;
3076
3077 methodOop m = vfst.method();
3078 if (!m->is_native()) {
3079 klassOop holder = m->method_holder();
3080 assert(holder->is_klass(), "just checking");
3081 oop loader = instanceKlass::cast(holder)->class_loader();
3082 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3083 return JNIHandles::make_local(env, loader);
3084 }
3085 }
3086 }
3087 return NULL;
3088 JVM_END
3089
3090
3091 // Utility object for collecting method holders walking down the stack
3092 class KlassLink: public ResourceObj {
3093 public:
3094 KlassHandle klass;
3095 KlassLink* next;
3096
3097 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3098 };
3099
3100
3101 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3102 JVMWrapper("JVM_GetClassContext");
3103 ResourceMark rm(THREAD);
3104 JvmtiVMObjectAllocEventCollector oam;
3105 // Collect linked list of (handles to) method holders
3106 KlassLink* first = NULL;
3107 KlassLink* last = NULL;
3108 int depth = 0;
3109
3110 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3111 // Native frames are not returned
3112 if (!vfst.method()->is_native()) {
3113 klassOop holder = vfst.method()->method_holder();
3114 assert(holder->is_klass(), "just checking");
3115 depth++;
3116 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3117 if (first == NULL) {
3118 first = last = l;
3119 } else {
3120 last->next = l;
3121 last = l;
3122 }
3123 }
3124 }
3125
3126 // Create result array of type [Ljava/lang/Class;
3127 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3128 // Fill in mirrors corresponding to method holders
3129 int index = 0;
3130 while (first != NULL) {
3131 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3132 first = first->next;
3133 }
3134 assert(index == depth, "just checking");
3135
3136 return (jobjectArray) JNIHandles::make_local(env, result);
3137 JVM_END
3138
3139
3140 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3141 JVMWrapper("JVM_ClassDepth");
3142 ResourceMark rm(THREAD);
3143 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3144 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3145
3146 const char* str = java_lang_String::as_utf8_string(class_name_str());
3147 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3148 if (class_name_sym == NULL) {
3149 return -1;
3150 }
3151
3152 int depth = 0;
3153
3154 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3155 if (!vfst.method()->is_native()) {
3156 klassOop holder = vfst.method()->method_holder();
3157 assert(holder->is_klass(), "just checking");
3158 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3159 return depth;
3160 }
3161 depth++;
3162 }
3163 }
3164 return -1;
3165 JVM_END
3166
3167
3168 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3169 JVMWrapper("JVM_ClassLoaderDepth");
3170 ResourceMark rm(THREAD);
3171 int depth = 0;
3172 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3173 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3174 bool trusted = is_trusted_frame(thread, &vfst);
3175 if (trusted) return -1;
3176
3177 methodOop m = vfst.method();
3178 if (!m->is_native()) {
3179 klassOop holder = m->method_holder();
3180 assert(holder->is_klass(), "just checking");
3181 oop loader = instanceKlass::cast(holder)->class_loader();
3182 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3183 return depth;
3184 }
3185 depth++;
3186 }
3187 }
3188 return -1;
3189 JVM_END
3190
3191
3192 // java.lang.Package ////////////////////////////////////////////////////////////////
3193
3194
3195 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3196 JVMWrapper("JVM_GetSystemPackage");
3197 ResourceMark rm(THREAD);
3198 JvmtiVMObjectAllocEventCollector oam;
3199 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3200 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3201 return (jstring) JNIHandles::make_local(result);
3202 JVM_END
3203
3204
3205 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3206 JVMWrapper("JVM_GetSystemPackages");
3207 JvmtiVMObjectAllocEventCollector oam;
3208 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3209 return (jobjectArray) JNIHandles::make_local(result);
3210 JVM_END
3211
3212
3213 // ObjectInputStream ///////////////////////////////////////////////////////////////
3214
3215 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3216 if (current_class == NULL) {
3217 return true;
3218 }
3219 if ((current_class == field_class) || access.is_public()) {
3220 return true;
3221 }
3222
3223 if (access.is_protected()) {
3224 // See if current_class is a subclass of field_class
3225 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3226 return true;
3227 }
3228 }
3229
3230 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3231 }
3232
3233
3234 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3235 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3236 JVMWrapper("JVM_AllocateNewObject");
3237 JvmtiVMObjectAllocEventCollector oam;
3238 // Receiver is not used
3239 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3240 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3241
3242 // Cannot instantiate primitive types
3243 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3244 ResourceMark rm(THREAD);
3245 THROW_0(vmSymbols::java_lang_InvalidClassException());
3246 }
3247
3248 // Arrays not allowed here, must use JVM_AllocateNewArray
3249 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3250 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3251 ResourceMark rm(THREAD);
3252 THROW_0(vmSymbols::java_lang_InvalidClassException());
3253 }
3254
3255 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3256 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3257
3258 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3259
3260 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3261 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3262
3263 // Make sure klass is initialized, since we are about to instantiate one of them.
3264 curr_klass->initialize(CHECK_NULL);
3265
3266 methodHandle m (THREAD,
3267 init_klass->find_method(vmSymbols::object_initializer_name(),
3268 vmSymbols::void_method_signature()));
3269 if (m.is_null()) {
3270 ResourceMark rm(THREAD);
3271 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3272 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3273 vmSymbols::object_initializer_name(),
3274 vmSymbols::void_method_signature()));
3275 }
3276
3277 if (curr_klass == init_klass && !m->is_public()) {
3278 // Calling the constructor for class 'curr_klass'.
3279 // Only allow calls to a public no-arg constructor.
3280 // This path corresponds to creating an Externalizable object.
3281 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3282 }
3283
3284 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3285 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3286 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3287 }
3288
3289 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3290 // Call constructor m. This might call a constructor higher up in the hierachy
3291 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3292
3293 return JNIHandles::make_local(obj());
3294 JVM_END
3295
3296
3297 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3298 JVMWrapper("JVM_AllocateNewArray");
3299 JvmtiVMObjectAllocEventCollector oam;
3300 oop mirror = JNIHandles::resolve_non_null(currClass);
3301
3302 if (java_lang_Class::is_primitive(mirror)) {
3303 THROW_0(vmSymbols::java_lang_InvalidClassException());
3304 }
3305 klassOop k = java_lang_Class::as_klassOop(mirror);
3306 oop result;
3307
3308 if (k->klass_part()->oop_is_typeArray()) {
3309 // typeArray
3310 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3311 } else if (k->klass_part()->oop_is_objArray()) {
3312 // objArray
3313 objArrayKlassHandle oak(THREAD, k);
3314 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3315 result = oak->allocate(length, CHECK_NULL);
3316 } else {
3317 THROW_0(vmSymbols::java_lang_InvalidClassException());
3318 }
3319 return JNIHandles::make_local(env, result);
3320 JVM_END
3321
3322
3323 // Return the first non-null class loader up the execution stack, or null
3324 // if only code from the null class loader is on the stack.
3325
3326 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3327 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3328 // UseNewReflection
3329 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3330 klassOop holder = vfst.method()->method_holder();
3331 oop loader = instanceKlass::cast(holder)->class_loader();
3332 if (loader != NULL) {
3333 return JNIHandles::make_local(env, loader);
3334 }
3335 }
3336 return NULL;
3337 JVM_END
3338
3339
3340 // Load a class relative to the most recent class on the stack with a non-null
3341 // classloader.
3342 // This function has been deprecated and should not be considered part of the
3343 // specified JVM interface.
3344
3345 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3346 jclass currClass, jstring currClassName))
3347 JVMWrapper("JVM_LoadClass0");
3348 // Receiver is not used
3349 ResourceMark rm(THREAD);
3350
3351 // Class name argument is not guaranteed to be in internal format
3352 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3353 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3354
3355 const char* str = java_lang_String::as_utf8_string(string());
3356
3357 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3358 // It's impossible to create this class; the name cannot fit
3359 // into the constant pool.
3360 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3361 }
3362
3363 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3364 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3365 // Find the most recent class on the stack with a non-null classloader
3366 oop loader = NULL;
3367 oop protection_domain = NULL;
3368 if (curr_klass.is_null()) {
3369 for (vframeStream vfst(thread);
3370 !vfst.at_end() && loader == NULL;
3371 vfst.next()) {
3372 if (!vfst.method()->is_native()) {
3373 klassOop holder = vfst.method()->method_holder();
3374 loader = instanceKlass::cast(holder)->class_loader();
3375 protection_domain = instanceKlass::cast(holder)->protection_domain();
3376 }
3377 }
3378 } else {
3379 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3380 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3381 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3382 }
3383 Handle h_loader(THREAD, loader);
3384 Handle h_prot (THREAD, protection_domain);
3385 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3386 false, thread);
3387 if (TraceClassResolution && result != NULL) {
3388 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3389 }
3390 return result;
3391 JVM_END
3392
3393
3394 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3395
3396
3397 // resolve array handle and check arguments
3398 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3399 if (arr == NULL) {
3400 THROW_0(vmSymbols::java_lang_NullPointerException());
3401 }
3402 oop a = JNIHandles::resolve_non_null(arr);
3403 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3404 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3405 }
3406 return arrayOop(a);
3407 }
3408
3409
3410 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3411 JVMWrapper("JVM_GetArrayLength");
3412 arrayOop a = check_array(env, arr, false, CHECK_0);
3413 return a->length();
3414 JVM_END
3415
3416
3417 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3418 JVMWrapper("JVM_Array_Get");
3419 JvmtiVMObjectAllocEventCollector oam;
3420 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3421 jvalue value;
3422 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3423 oop box = Reflection::box(&value, type, CHECK_NULL);
3424 return JNIHandles::make_local(env, box);
3425 JVM_END
3426
3427
3428 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3429 JVMWrapper("JVM_GetPrimitiveArrayElement");
3430 jvalue value;
3431 value.i = 0; // to initialize value before getting used in CHECK
3432 arrayOop a = check_array(env, arr, true, CHECK_(value));
3433 assert(a->is_typeArray(), "just checking");
3434 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3435 BasicType wide_type = (BasicType) wCode;
3436 if (type != wide_type) {
3437 Reflection::widen(&value, type, wide_type, CHECK_(value));
3438 }
3439 return value;
3440 JVM_END
3441
3442
3443 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3444 JVMWrapper("JVM_SetArrayElement");
3445 arrayOop a = check_array(env, arr, false, CHECK);
3446 oop box = JNIHandles::resolve(val);
3447 jvalue value;
3448 value.i = 0; // to initialize value before getting used in CHECK
3449 BasicType value_type;
3450 if (a->is_objArray()) {
3451 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3452 value_type = Reflection::unbox_for_regular_object(box, &value);
3453 } else {
3454 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3455 }
3456 Reflection::array_set(&value, a, index, value_type, CHECK);
3457 JVM_END
3458
3459
3460 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3461 JVMWrapper("JVM_SetPrimitiveArrayElement");
3462 arrayOop a = check_array(env, arr, true, CHECK);
3463 assert(a->is_typeArray(), "just checking");
3464 BasicType value_type = (BasicType) vCode;
3465 Reflection::array_set(&v, a, index, value_type, CHECK);
3466 JVM_END
3467
3468
3469 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3470 JVMWrapper("JVM_NewArray");
3471 JvmtiVMObjectAllocEventCollector oam;
3472 oop element_mirror = JNIHandles::resolve(eltClass);
3473 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3474 return JNIHandles::make_local(env, result);
3475 JVM_END
3476
3477
3478 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3479 JVMWrapper("JVM_NewMultiArray");
3480 JvmtiVMObjectAllocEventCollector oam;
3481 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3482 oop element_mirror = JNIHandles::resolve(eltClass);
3483 assert(dim_array->is_typeArray(), "just checking");
3484 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3485 return JNIHandles::make_local(env, result);
3486 JVM_END
3487
3488
3489 // Networking library support ////////////////////////////////////////////////////////////////////
3490
3491 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3492 JVMWrapper("JVM_InitializeSocketLibrary");
3493 return 0;
3494 JVM_END
3495
3496
3497 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3498 JVMWrapper("JVM_Socket");
3499 return os::socket(domain, type, protocol);
3500 JVM_END
3501
3502
3503 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3504 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3505 //%note jvm_r6
3506 return os::socket_close(fd);
3507 JVM_END
3508
3509
3510 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3511 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3512 //%note jvm_r6
3513 return os::socket_shutdown(fd, howto);
3514 JVM_END
3515
3516
3517 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3518 JVMWrapper2("JVM_Recv (0x%x)", fd);
3519 //%note jvm_r6
3520 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3521 JVM_END
3522
3523
3524 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3525 JVMWrapper2("JVM_Send (0x%x)", fd);
3526 //%note jvm_r6
3527 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3528 JVM_END
3529
3530
3531 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3532 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3533 //%note jvm_r6
3534 return os::timeout(fd, timeout);
3535 JVM_END
3536
3537
3538 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3539 JVMWrapper2("JVM_Listen (0x%x)", fd);
3540 //%note jvm_r6
3541 return os::listen(fd, count);
3542 JVM_END
3543
3544
3545 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3546 JVMWrapper2("JVM_Connect (0x%x)", fd);
3547 //%note jvm_r6
3548 return os::connect(fd, him, (socklen_t)len);
3549 JVM_END
3550
3551
3552 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3553 JVMWrapper2("JVM_Bind (0x%x)", fd);
3554 //%note jvm_r6
3555 return os::bind(fd, him, (socklen_t)len);
3556 JVM_END
3557
3558
3559 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3560 JVMWrapper2("JVM_Accept (0x%x)", fd);
3561 //%note jvm_r6
3562 socklen_t socklen = (socklen_t)(*len);
3563 jint result = os::accept(fd, him, &socklen);
3564 *len = (jint)socklen;
3565 return result;
3566 JVM_END
3567
3568
3569 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3570 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3571 //%note jvm_r6
3572 socklen_t socklen = (socklen_t)(*fromlen);
3573 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3574 *fromlen = (int)socklen;
3575 return result;
3576 JVM_END
3577
3578
3579 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3580 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3581 //%note jvm_r6
3582 socklen_t socklen = (socklen_t)(*len);
3583 jint result = os::get_sock_name(fd, him, &socklen);
3584 *len = (int)socklen;
3585 return result;
3586 JVM_END
3587
3588
3589 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3590 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3591 //%note jvm_r6
3592 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3593 JVM_END
3594
3595
3596 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3597 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3598 //%note jvm_r6
3599 return os::socket_available(fd, pbytes);
3600 JVM_END
3601
3602
3603 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3604 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3605 //%note jvm_r6
3606 socklen_t socklen = (socklen_t)(*optlen);
3607 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3608 *optlen = (int)socklen;
3609 return result;
3610 JVM_END
3611
3612
3613 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3614 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3615 //%note jvm_r6
3616 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3617 JVM_END
3618
3619
3620 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3621 JVMWrapper("JVM_GetHostName");
3622 return os::get_host_name(name, namelen);
3623 JVM_END
3624
3625
3626 // Library support ///////////////////////////////////////////////////////////////////////////
3627
3628 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3629 //%note jvm_ct
3630 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3631 char ebuf[1024];
3632 void *load_result;
3633 {
3634 ThreadToNativeFromVM ttnfvm(thread);
3635 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3636 }
3637 if (load_result == NULL) {
3638 char msg[1024];
3639 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3640 // Since 'ebuf' may contain a string encoded using
3641 // platform encoding scheme, we need to pass
3642 // Exceptions::unsafe_to_utf8 to the new_exception method
3643 // as the last argument. See bug 6367357.
3644 Handle h_exception =
3645 Exceptions::new_exception(thread,
3646 vmSymbols::java_lang_UnsatisfiedLinkError(),
3647 msg, Exceptions::unsafe_to_utf8);
3648
3649 THROW_HANDLE_0(h_exception);
3650 }
3651 return load_result;
3652 JVM_END
3653
3654
3655 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3656 JVMWrapper("JVM_UnloadLibrary");
3657 os::dll_unload(handle);
3658 JVM_END
3659
3660
3661 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3662 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3663 return os::dll_lookup(handle, name);
3664 JVM_END
3665
3666
3667 // Floating point support ////////////////////////////////////////////////////////////////////
3668
3669 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3670 JVMWrapper("JVM_IsNaN");
3671 return g_isnan(a);
3672 JVM_END
3673
3674
3675 // JNI version ///////////////////////////////////////////////////////////////////////////////
3676
3677 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3678 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3679 return Threads::is_supported_jni_version_including_1_1(version);
3680 JVM_END
3681
3682
3683 // String support ///////////////////////////////////////////////////////////////////////////
3684
3685 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3686 JVMWrapper("JVM_InternString");
3687 JvmtiVMObjectAllocEventCollector oam;
3688 if (str == NULL) return NULL;
3689 oop string = JNIHandles::resolve_non_null(str);
3690 oop result = StringTable::intern(string, CHECK_NULL);
3691 return (jstring) JNIHandles::make_local(env, result);
3692 JVM_END
3693
3694
3695 // Raw monitor support //////////////////////////////////////////////////////////////////////
3696
3697 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3698 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3699 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3700 // that only works with java threads.
3701
3702
3703 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3704 VM_Exit::block_if_vm_exited();
3705 JVMWrapper("JVM_RawMonitorCreate");
3706 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3707 }
3708
3709
3710 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3711 VM_Exit::block_if_vm_exited();
3712 JVMWrapper("JVM_RawMonitorDestroy");
3713 delete ((Mutex*) mon);
3714 }
3715
3716
3717 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3718 VM_Exit::block_if_vm_exited();
3719 JVMWrapper("JVM_RawMonitorEnter");
3720 ((Mutex*) mon)->jvm_raw_lock();
3721 return 0;
3722 }
3723
3724
3725 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3726 VM_Exit::block_if_vm_exited();
3727 JVMWrapper("JVM_RawMonitorExit");
3728 ((Mutex*) mon)->jvm_raw_unlock();
3729 }
3730
3731
3732 // Support for Serialization
3733
3734 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3735 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3736 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3737 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3738
3739 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3740 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3741 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3742 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3743
3744
3745 void initialize_converter_functions() {
3746 if (JDK_Version::is_gte_jdk14x_version()) {
3747 // These functions only exist for compatibility with 1.3.1 and earlier
3748 return;
3749 }
3750
3751 // called from universe_post_init()
3752 assert(
3753 int_bits_to_float_fn == NULL &&
3754 long_bits_to_double_fn == NULL &&
3755 float_to_int_bits_fn == NULL &&
3756 double_to_long_bits_fn == NULL ,
3757 "initialization done twice"
3758 );
3759 // initialize
3760 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3761 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3762 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3763 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3764 // verify
3765 assert(
3766 int_bits_to_float_fn != NULL &&
3767 long_bits_to_double_fn != NULL &&
3768 float_to_int_bits_fn != NULL &&
3769 double_to_long_bits_fn != NULL ,
3770 "initialization failed"
3771 );
3772 }
3773
3774
3775 // Serialization
3776 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3777 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3778 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3779
3780 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3781 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3782 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3783 oop o = JNIHandles::resolve(obj);
3784
3785 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3786 THROW(vmSymbols::java_lang_NullPointerException());
3787 }
3788
3789 jsize nfids = fids->length();
3790 if (nfids == 0) return;
3791
3792 if (tcodes->length() < nfids) {
3793 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3794 }
3795
3796 jsize off = 0;
3797 /* loop through fields, setting values */
3798 for (jsize i = 0; i < nfids; i++) {
3799 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3800 int field_offset;
3801 if (fid != NULL) {
3802 // NULL is a legal value for fid, but retrieving the field offset
3803 // trigger assertion in that case
3804 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3805 }
3806
3807 switch (tcodes->char_at(i)) {
3808 case 'Z':
3809 if (fid != NULL) {
3810 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3811 o->bool_field_put(field_offset, val);
3812 }
3813 off++;
3814 break;
3815
3816 case 'B':
3817 if (fid != NULL) {
3818 o->byte_field_put(field_offset, dbuf->byte_at(off));
3819 }
3820 off++;
3821 break;
3822
3823 case 'C':
3824 if (fid != NULL) {
3825 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3826 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3827 o->char_field_put(field_offset, val);
3828 }
3829 off += 2;
3830 break;
3831
3832 case 'S':
3833 if (fid != NULL) {
3834 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3835 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3836 o->short_field_put(field_offset, val);
3837 }
3838 off += 2;
3839 break;
3840
3841 case 'I':
3842 if (fid != NULL) {
3843 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3844 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3845 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3846 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3847 o->int_field_put(field_offset, ival);
3848 }
3849 off += 4;
3850 break;
3851
3852 case 'F':
3853 if (fid != NULL) {
3854 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3855 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3856 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3857 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3858 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3859 o->float_field_put(field_offset, fval);
3860 }
3861 off += 4;
3862 break;
3863
3864 case 'J':
3865 if (fid != NULL) {
3866 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3867 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3868 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3869 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3870 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3871 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3872 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3873 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3874 o->long_field_put(field_offset, lval);
3875 }
3876 off += 8;
3877 break;
3878
3879 case 'D':
3880 if (fid != NULL) {
3881 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3882 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3883 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3884 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3885 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3886 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3887 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3888 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3889 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3890 o->double_field_put(field_offset, dval);
3891 }
3892 off += 8;
3893 break;
3894
3895 default:
3896 // Illegal typecode
3897 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3898 }
3899 }
3900 JVM_END
3901
3902
3903 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3904 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3905 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3906
3907 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3908 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3909 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3910 oop o = JNIHandles::resolve(obj);
3911
3912 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3913 THROW(vmSymbols::java_lang_NullPointerException());
3914 }
3915
3916 jsize nfids = fids->length();
3917 if (nfids == 0) return;
3918
3919 if (tcodes->length() < nfids) {
3920 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3921 }
3922
3923 /* loop through fields, fetching values */
3924 jsize off = 0;
3925 for (jsize i = 0; i < nfids; i++) {
3926 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3927 if (fid == NULL) {
3928 THROW(vmSymbols::java_lang_NullPointerException());
3929 }
3930 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3931
3932 switch (tcodes->char_at(i)) {
3933 case 'Z':
3934 {
3935 jboolean val = o->bool_field(field_offset);
3936 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3937 }
3938 break;
3939
3940 case 'B':
3941 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3942 break;
3943
3944 case 'C':
3945 {
3946 jchar val = o->char_field(field_offset);
3947 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3948 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3949 }
3950 break;
3951
3952 case 'S':
3953 {
3954 jshort val = o->short_field(field_offset);
3955 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3956 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3957 }
3958 break;
3959
3960 case 'I':
3961 {
3962 jint val = o->int_field(field_offset);
3963 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3964 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3965 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3966 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3967 }
3968 break;
3969
3970 case 'F':
3971 {
3972 jfloat fval = o->float_field(field_offset);
3973 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3974 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3975 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3976 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3977 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3978 }
3979 break;
3980
3981 case 'J':
3982 {
3983 jlong val = o->long_field(field_offset);
3984 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3985 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3986 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3987 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3988 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3989 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3990 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3991 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3992 }
3993 break;
3994
3995 case 'D':
3996 {
3997 jdouble dval = o->double_field(field_offset);
3998 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3999 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4000 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4001 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4002 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4003 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4004 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4005 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4006 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4007 }
4008 break;
4009
4010 default:
4011 // Illegal typecode
4012 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4013 }
4014 }
4015 JVM_END
4016
4017
4018 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4019
4020 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4021 // Security Note:
4022 // The Java level wrapper will perform the necessary security check allowing
4023 // us to pass the NULL as the initiating class loader.
4024 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4025
4026 KlassHandle klass_handle(THREAD, klass);
4027 // Check if we should initialize the class
4028 if (init && klass_handle->oop_is_instance()) {
4029 klass_handle->initialize(CHECK_NULL);
4030 }
4031 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4032 }
4033
4034
4035 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4036
4037 #ifndef PRODUCT
4038
4039 extern "C" {
4040 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4041 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4042 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4043 }
4044
4045 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4046 JVMWrapper("JVM_AccessBoolVMFlag");
4047 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4048 JVM_END
4049
4050 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4051 JVMWrapper("JVM_AccessVMIntFlag");
4052 intx v;
4053 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4054 *value = (jint)v;
4055 return result;
4056 JVM_END
4057
4058
4059 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4060 JVMWrapper("JVM_VMBreakPoint");
4061 oop the_obj = JNIHandles::resolve(obj);
4062 BREAKPOINT;
4063 JVM_END
4064
4065
4066 #endif
4067
4068
4069 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4070
4071 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4072 JVMWrapper("JVM_InvokeMethod");
4073 Handle method_handle;
4074 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4075 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4076 Handle receiver(THREAD, JNIHandles::resolve(obj));
4077 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4078 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4079 jobject res = JNIHandles::make_local(env, result);
4080 if (JvmtiExport::should_post_vm_object_alloc()) {
4081 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4082 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4083 if (java_lang_Class::is_primitive(ret_type)) {
4084 // Only for primitive type vm allocates memory for java object.
4085 // See box() method.
4086 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4087 }
4088 }
4089 return res;
4090 } else {
4091 THROW_0(vmSymbols::java_lang_StackOverflowError());
4092 }
4093 JVM_END
4094
4095
4096 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4097 JVMWrapper("JVM_NewInstanceFromConstructor");
4098 oop constructor_mirror = JNIHandles::resolve(c);
4099 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4100 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4101 jobject res = JNIHandles::make_local(env, result);
4102 if (JvmtiExport::should_post_vm_object_alloc()) {
4103 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4104 }
4105 return res;
4106 JVM_END
4107
4108 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4109
4110 JVM_LEAF(jboolean, JVM_SupportsCX8())
4111 JVMWrapper("JVM_SupportsCX8");
4112 return VM_Version::supports_cx8();
4113 JVM_END
4114
4115
4116 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4117 JVMWrapper("JVM_CX8Field");
4118 jlong res;
4119 oop o = JNIHandles::resolve(obj);
4120 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4121 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4122
4123 assert(VM_Version::supports_cx8(), "cx8 not supported");
4124 res = Atomic::cmpxchg(newVal, addr, oldVal);
4125
4126 return res == oldVal;
4127 JVM_END
4128
4129 // DTrace ///////////////////////////////////////////////////////////////////
4130
4131 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4132 JVMWrapper("JVM_DTraceGetVersion");
4133 return (jint)JVM_TRACING_DTRACE_VERSION;
4134 JVM_END
4135
4136 JVM_ENTRY(jlong,JVM_DTraceActivate(
4137 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4138 JVM_DTraceProvider* providers))
4139 JVMWrapper("JVM_DTraceActivate");
4140 return DTraceJSDT::activate(
4141 version, module_name, providers_count, providers, CHECK_0);
4142 JVM_END
4143
4144 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4145 JVMWrapper("JVM_DTraceIsProbeEnabled");
4146 return DTraceJSDT::is_probe_enabled(method);
4147 JVM_END
4148
4149 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4150 JVMWrapper("JVM_DTraceDispose");
4151 DTraceJSDT::dispose(handle);
4152 JVM_END
4153
4154 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4155 JVMWrapper("JVM_DTraceIsSupported");
4156 return DTraceJSDT::is_supported();
4157 JVM_END
4158
4159 // Returns an array of all live Thread objects (VM internal JavaThreads,
4160 // jvmti agent threads, and JNI attaching threads are skipped)
4161 // See CR 6404306 regarding JNI attaching threads
4162 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4163 ResourceMark rm(THREAD);
4164 ThreadsListEnumerator tle(THREAD, false, false);
4165 JvmtiVMObjectAllocEventCollector oam;
4166
4167 int num_threads = tle.num_threads();
4168 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4169 objArrayHandle threads_ah(THREAD, r);
4170
4171 for (int i = 0; i < num_threads; i++) {
4172 Handle h = tle.get_threadObj(i);
4173 threads_ah->obj_at_put(i, h());
4174 }
4175
4176 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4177 JVM_END
4178
4179
4180 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4181 // Return StackTraceElement[][], each element is the stack trace of a thread in
4182 // the corresponding entry in the given threads array
4183 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4184 JVMWrapper("JVM_DumpThreads");
4185 JvmtiVMObjectAllocEventCollector oam;
4186
4187 // Check if threads is null
4188 if (threads == NULL) {
4189 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4190 }
4191
4192 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4193 objArrayHandle ah(THREAD, a);
4194 int num_threads = ah->length();
4195 // check if threads is non-empty array
4196 if (num_threads == 0) {
4197 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4198 }
4199
4200 // check if threads is not an array of objects of Thread class
4201 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4202 if (k != SystemDictionary::Thread_klass()) {
4203 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4204 }
4205
4206 ResourceMark rm(THREAD);
4207
4208 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4209 for (int i = 0; i < num_threads; i++) {
4210 oop thread_obj = ah->obj_at(i);
4211 instanceHandle h(THREAD, (instanceOop) thread_obj);
4212 thread_handle_array->append(h);
4213 }
4214
4215 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4216 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4217
4218 JVM_END
4219
4220 // JVM monitoring and management support
4221 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4222 return Management::get_jmm_interface(version);
4223 JVM_END
4224
4225 // com.sun.tools.attach.VirtualMachine agent properties support
4226 //
4227 // Initialize the agent properties with the properties maintained in the VM
4228 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4229 JVMWrapper("JVM_InitAgentProperties");
4230 ResourceMark rm;
4231
4232 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4233
4234 PUTPROP(props, "sun.java.command", Arguments::java_command());
4235 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4236 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4237 return properties;
4238 JVM_END
4239
4240 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4241 {
4242 JVMWrapper("JVM_GetEnclosingMethodInfo");
4243 JvmtiVMObjectAllocEventCollector oam;
4244
4245 if (ofClass == NULL) {
4246 return NULL;
4247 }
4248 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4249 // Special handling for primitive objects
4250 if (java_lang_Class::is_primitive(mirror())) {
4251 return NULL;
4252 }
4253 klassOop k = java_lang_Class::as_klassOop(mirror());
4254 if (!Klass::cast(k)->oop_is_instance()) {
4255 return NULL;
4256 }
4257 instanceKlassHandle ik_h(THREAD, k);
4258 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4259 if (encl_method_class_idx == 0) {
4260 return NULL;
4261 }
4262 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4263 objArrayHandle dest(THREAD, dest_o);
4264 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4265 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4266 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4267 if (encl_method_method_idx != 0) {
4268 Symbol* sym = ik_h->constants()->symbol_at(
4269 extract_low_short_from_int(
4270 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4271 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4272 dest->obj_at_put(1, str());
4273 sym = ik_h->constants()->symbol_at(
4274 extract_high_short_from_int(
4275 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4276 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4277 dest->obj_at_put(2, str());
4278 }
4279 return (jobjectArray) JNIHandles::make_local(dest());
4280 }
4281 JVM_END
4282
4283 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4284 jint javaThreadState))
4285 {
4286 // If new thread states are added in future JDK and VM versions,
4287 // this should check if the JDK version is compatible with thread
4288 // states supported by the VM. Return NULL if not compatible.
4289 //
4290 // This function must map the VM java_lang_Thread::ThreadStatus
4291 // to the Java thread state that the JDK supports.
4292 //
4293
4294 typeArrayHandle values_h;
4295 switch (javaThreadState) {
4296 case JAVA_THREAD_STATE_NEW : {
4297 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4298 values_h = typeArrayHandle(THREAD, r);
4299 values_h->int_at_put(0, java_lang_Thread::NEW);
4300 break;
4301 }
4302 case JAVA_THREAD_STATE_RUNNABLE : {
4303 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4304 values_h = typeArrayHandle(THREAD, r);
4305 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4306 break;
4307 }
4308 case JAVA_THREAD_STATE_BLOCKED : {
4309 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4310 values_h = typeArrayHandle(THREAD, r);
4311 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4312 break;
4313 }
4314 case JAVA_THREAD_STATE_WAITING : {
4315 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4316 values_h = typeArrayHandle(THREAD, r);
4317 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4318 values_h->int_at_put(1, java_lang_Thread::PARKED);
4319 break;
4320 }
4321 case JAVA_THREAD_STATE_TIMED_WAITING : {
4322 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4323 values_h = typeArrayHandle(THREAD, r);
4324 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4325 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4326 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4327 break;
4328 }
4329 case JAVA_THREAD_STATE_TERMINATED : {
4330 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4331 values_h = typeArrayHandle(THREAD, r);
4332 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4333 break;
4334 }
4335 default:
4336 // Unknown state - probably incompatible JDK version
4337 return NULL;
4338 }
4339
4340 return (jintArray) JNIHandles::make_local(env, values_h());
4341 }
4342 JVM_END
4343
4344
4345 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4346 jint javaThreadState,
4347 jintArray values))
4348 {
4349 // If new thread states are added in future JDK and VM versions,
4350 // this should check if the JDK version is compatible with thread
4351 // states supported by the VM. Return NULL if not compatible.
4352 //
4353 // This function must map the VM java_lang_Thread::ThreadStatus
4354 // to the Java thread state that the JDK supports.
4355 //
4356
4357 ResourceMark rm;
4358
4359 // Check if threads is null
4360 if (values == NULL) {
4361 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4362 }
4363
4364 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4365 typeArrayHandle values_h(THREAD, v);
4366
4367 objArrayHandle names_h;
4368 switch (javaThreadState) {
4369 case JAVA_THREAD_STATE_NEW : {
4370 assert(values_h->length() == 1 &&
4371 values_h->int_at(0) == java_lang_Thread::NEW,
4372 "Invalid threadStatus value");
4373
4374 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4375 1, /* only 1 substate */
4376 CHECK_NULL);
4377 names_h = objArrayHandle(THREAD, r);
4378 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4379 names_h->obj_at_put(0, name());
4380 break;
4381 }
4382 case JAVA_THREAD_STATE_RUNNABLE : {
4383 assert(values_h->length() == 1 &&
4384 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4385 "Invalid threadStatus value");
4386
4387 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4388 1, /* only 1 substate */
4389 CHECK_NULL);
4390 names_h = objArrayHandle(THREAD, r);
4391 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4392 names_h->obj_at_put(0, name());
4393 break;
4394 }
4395 case JAVA_THREAD_STATE_BLOCKED : {
4396 assert(values_h->length() == 1 &&
4397 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4398 "Invalid threadStatus value");
4399
4400 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4401 1, /* only 1 substate */
4402 CHECK_NULL);
4403 names_h = objArrayHandle(THREAD, r);
4404 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4405 names_h->obj_at_put(0, name());
4406 break;
4407 }
4408 case JAVA_THREAD_STATE_WAITING : {
4409 assert(values_h->length() == 2 &&
4410 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4411 values_h->int_at(1) == java_lang_Thread::PARKED,
4412 "Invalid threadStatus value");
4413 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4414 2, /* number of substates */
4415 CHECK_NULL);
4416 names_h = objArrayHandle(THREAD, r);
4417 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4418 CHECK_NULL);
4419 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4420 CHECK_NULL);
4421 names_h->obj_at_put(0, name0());
4422 names_h->obj_at_put(1, name1());
4423 break;
4424 }
4425 case JAVA_THREAD_STATE_TIMED_WAITING : {
4426 assert(values_h->length() == 3 &&
4427 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4428 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4429 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4430 "Invalid threadStatus value");
4431 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4432 3, /* number of substates */
4433 CHECK_NULL);
4434 names_h = objArrayHandle(THREAD, r);
4435 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4436 CHECK_NULL);
4437 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4438 CHECK_NULL);
4439 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4440 CHECK_NULL);
4441 names_h->obj_at_put(0, name0());
4442 names_h->obj_at_put(1, name1());
4443 names_h->obj_at_put(2, name2());
4444 break;
4445 }
4446 case JAVA_THREAD_STATE_TERMINATED : {
4447 assert(values_h->length() == 1 &&
4448 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4449 "Invalid threadStatus value");
4450 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4451 1, /* only 1 substate */
4452 CHECK_NULL);
4453 names_h = objArrayHandle(THREAD, r);
4454 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4455 names_h->obj_at_put(0, name());
4456 break;
4457 }
4458 default:
4459 // Unknown state - probably incompatible JDK version
4460 return NULL;
4461 }
4462 return (jobjectArray) JNIHandles::make_local(env, names_h());
4463 }
4464 JVM_END
4465
4466 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4467 {
4468 memset(info, 0, sizeof(info_size));
4469
4470 info->jvm_version = Abstract_VM_Version::jvm_version();
4471 info->update_version = 0; /* 0 in HotSpot Express VM */
4472 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4473
4474 // when we add a new capability in the jvm_version_info struct, we should also
4475 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4476 // counter defined in runtimeService.cpp.
4477 info->is_attachable = AttachListener::is_attach_supported();
4478 #ifdef KERNEL
4479 info->is_kernel_jvm = 1; // true;
4480 #else // KERNEL
4481 info->is_kernel_jvm = 0; // false;
4482 #endif // KERNEL
4483 }
4484 JVM_END