1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/universe.inline.hpp"
35 #include "oops/fieldStreams.hpp"
36 #include "oops/instanceKlass.hpp"
37 #include "oops/objArrayKlass.hpp"
38 #include "oops/methodOop.hpp"
39 #include "prims/jvm.h"
40 #include "prims/jvm_misc.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "prims/jvmtiThreadState.hpp"
43 #include "prims/nativeLookup.hpp"
44 #include "prims/privilegedStack.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/dtraceJSDT.hpp"
47 #include "runtime/handles.inline.hpp"
48 #include "runtime/init.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/os.hpp"
54 #include "runtime/perfData.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/vframe.hpp"
57 #include "runtime/vm_operations.hpp"
58 #include "services/attachListener.hpp"
59 #include "services/management.hpp"
60 #include "services/threadService.hpp"
61 #include "trace/tracing.hpp"
62 #include "utilities/copy.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/top.hpp"
68 #include "utilities/utf8.hpp"
69 #ifdef TARGET_OS_FAMILY_linux
70 # include "jvm_linux.h"
71 #endif
72 #ifdef TARGET_OS_FAMILY_solaris
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "jvm_windows.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_bsd
79 # include "jvm_bsd.h"
80 #endif
81
82 #include <errno.h>
83
84 #ifndef USDT2
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
88 #endif /* !USDT2 */
89
90 /*
91 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
92 such ctors and calls MUST NOT come between an oop declaration/init and its
93 usage because if objects are move this may cause various memory stomps, bus
94 errors and segfaults. Here is a cookbook for causing so called "naked oop
95 failures":
96
97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
98 JVMWrapper("JVM_GetClassDeclaredFields");
99
100 // Object address to be held directly in mirror & not visible to GC
101 oop mirror = JNIHandles::resolve_non_null(ofClass);
102
103 // If this ctor can hit a safepoint, moving objects around, then
104 ComplexConstructor foo;
105
106 // Boom! mirror may point to JUNK instead of the intended object
107 (some dereference of mirror)
108
109 // Here's another call that may block for GC, making mirror stale
110 MutexLocker ml(some_lock);
111
112 // And here's an initializer that can result in a stale oop
113 // all in one step.
114 oop o = call_that_can_throw_exception(TRAPS);
115
116
117 The solution is to keep the oop declaration BELOW the ctor or function
118 call that might cause a GC, do another resolve to reassign the oop, or
119 consider use of a Handle instead of an oop so there is immunity from object
120 motion. But note that the "QUICK" entries below do not have a handlemark
121 and thus can only support use of handles passed in.
122 */
123
124 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
125 ResourceMark rm;
126 int line_number = -1;
127 const char * source_file = NULL;
128 const char * trace = "explicit";
129 klassOop caller = NULL;
130 JavaThread* jthread = JavaThread::current();
131 if (jthread->has_last_Java_frame()) {
132 vframeStream vfst(jthread);
133
134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
136 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
138 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
139
140 methodOop last_caller = NULL;
141
142 while (!vfst.at_end()) {
143 methodOop m = vfst.method();
144 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
145 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
146 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
147 break;
148 }
149 last_caller = m;
150 vfst.next();
151 }
152 // if this is called from Class.forName0 and that is called from Class.forName,
153 // then print the caller of Class.forName. If this is Class.loadClass, then print
154 // that caller, otherwise keep quiet since this should be picked up elsewhere.
155 bool found_it = false;
156 if (!vfst.at_end() &&
157 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName0_name()) {
159 vfst.next();
160 if (!vfst.at_end() &&
161 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName_name()) {
163 vfst.next();
164 found_it = true;
165 }
166 } else if (last_caller != NULL &&
167 instanceKlass::cast(last_caller->method_holder())->name() ==
168 vmSymbols::java_lang_ClassLoader() &&
169 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
170 last_caller->name() == vmSymbols::loadClass_name())) {
171 found_it = true;
172 } else if (!vfst.at_end()) {
173 if (vfst.method()->is_native()) {
174 // JNI call
175 found_it = true;
176 }
177 }
178 if (found_it && !vfst.at_end()) {
179 // found the caller
180 caller = vfst.method()->method_holder();
181 line_number = vfst.method()->line_number_from_bci(vfst.bci());
182 if (line_number == -1) {
183 // show method name if it's a native method
184 trace = vfst.method()->name_and_sig_as_C_string();
185 }
186 Symbol* s = instanceKlass::cast(caller)->source_file_name();
187 if (s != NULL) {
188 source_file = s->as_C_string();
189 }
190 }
191 }
192 if (caller != NULL) {
193 if (to_class != caller) {
194 const char * from = Klass::cast(caller)->external_name();
195 const char * to = Klass::cast(to_class)->external_name();
196 // print in a single call to reduce interleaving between threads
197 if (source_file != NULL) {
198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
199 } else {
200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
201 }
202 }
203 }
204 }
205
206 void trace_class_resolution(klassOop to_class) {
207 EXCEPTION_MARK;
208 trace_class_resolution_impl(to_class, THREAD);
209 if (HAS_PENDING_EXCEPTION) {
210 CLEAR_PENDING_EXCEPTION;
211 }
212 }
213
214 // Wrapper to trace JVM functions
215
216 #ifdef ASSERT
217 class JVMTraceWrapper : public StackObj {
218 public:
219 JVMTraceWrapper(const char* format, ...) {
220 if (TraceJVMCalls) {
221 va_list ap;
222 va_start(ap, format);
223 tty->print("JVM ");
224 tty->vprint_cr(format, ap);
225 va_end(ap);
226 }
227 }
228 };
229
230 Histogram* JVMHistogram;
231 volatile jint JVMHistogram_lock = 0;
232
233 class JVMHistogramElement : public HistogramElement {
234 public:
235 JVMHistogramElement(const char* name);
236 };
237
238 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
239 _name = elementName;
240 uintx count = 0;
241
242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
244 count +=1;
245 if ( (WarnOnStalledSpinLock > 0)
246 && (count % WarnOnStalledSpinLock == 0)) {
247 warning("JVMHistogram_lock seems to be stalled");
248 }
249 }
250 }
251
252 if(JVMHistogram == NULL)
253 JVMHistogram = new Histogram("JVM Call Counts",100);
254
255 JVMHistogram->add_element(this);
256 Atomic::dec(&JVMHistogram_lock);
257 }
258
259 #define JVMCountWrapper(arg) \
260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
262
263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
267 #else
268 #define JVMWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4)
272 #endif
273
274
275 // Interface version /////////////////////////////////////////////////////////////////////
276
277
278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
279 return JVM_INTERFACE_VERSION;
280 JVM_END
281
282
283 // java.lang.System //////////////////////////////////////////////////////////////////////
284
285
286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
287 JVMWrapper("JVM_CurrentTimeMillis");
288 return os::javaTimeMillis();
289 JVM_END
290
291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_NanoTime");
293 return os::javaTimeNanos();
294 JVM_END
295
296
297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 JVMWrapper("JVM_ArrayCopy");
300 // Check if we have null pointers
301 if (src == NULL || dst == NULL) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
311
312
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
328
329
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
331
332
333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
334 JVMWrapper("JVM_InitProperties");
335 ResourceMark rm;
336
337 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
338
339 // System property list includes both user set via -D option and
340 // jvm system specific properties.
341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
342 PUTPROP(props, p->key(), p->value());
343 }
344
345 // Convert the -XX:MaxDirectMemorySize= command line flag
346 // to the sun.nio.MaxDirectMemorySize property.
347 // Do this after setting user properties to prevent people
348 // from setting the value with a -D option, as requested.
349 {
350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
352 } else {
353 char as_chars[256];
354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
356 }
357 }
358
359 // JVM monitoring and management support
360 // Add the sun.management.compiler property for the compiler's name
361 {
362 #undef CSIZE
363 #if defined(_LP64) || defined(_WIN64)
364 #define CSIZE "64-Bit "
365 #else
366 #define CSIZE
367 #endif // 64bit
368
369 #ifdef TIERED
370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
371 #else
372 #if defined(COMPILER1)
373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
374 #elif defined(COMPILER2)
375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
376 #else
377 const char* compiler_name = "";
378 #endif // compilers
379 #endif // TIERED
380
381 if (*compiler_name != '\0' &&
382 (Arguments::mode() != Arguments::_int)) {
383 PUTPROP(props, "sun.management.compiler", compiler_name);
384 }
385 }
386
387 return properties;
388 JVM_END
389
390
391 /*
392 * Return the temporary directory that the VM uses for the attach
393 * and perf data files.
394 *
395 * It is important that this directory is well-known and the
396 * same for all VM instances. It cannot be affected by configuration
397 * variables such as java.io.tmpdir.
398 */
399 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
400 JVMWrapper("JVM_GetTemporaryDirectory");
401 HandleMark hm(THREAD);
402 const char* temp_dir = os::get_temp_directory();
403 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
404 return (jstring) JNIHandles::make_local(env, h());
405 JVM_END
406
407
408 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
409
410 extern volatile jint vm_created;
411
412 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
413 if (vm_created != 0 && (code == 0)) {
414 // The VM is about to exit. We call back into Java to check whether finalizers should be run
415 Universe::run_finalizers_on_exit();
416 }
417 before_exit(thread);
418 vm_exit(code);
419 JVM_END
420
421
422 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
423 before_exit(thread);
424 vm_exit(code);
425 JVM_END
426
427
428 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
429 register_on_exit_function(func);
430 JVM_END
431
432
433 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
434 JVMWrapper("JVM_GC");
435 if (!DisableExplicitGC) {
436 Universe::heap()->collect(GCCause::_java_lang_system_gc);
437 }
438 JVM_END
439
440
441 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
442 JVMWrapper("JVM_MaxObjectInspectionAge");
443 return Universe::heap()->millis_since_last_gc();
444 JVM_END
445
446
447 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
448 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
449 JVM_END
450
451
452 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
453 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
454 JVM_END
455
456 static inline jlong convert_size_t_to_jlong(size_t val) {
457 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
458 NOT_LP64 (return (jlong)val;)
459 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
460 }
461
462 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
463 JVMWrapper("JVM_TotalMemory");
464 size_t n = Universe::heap()->capacity();
465 return convert_size_t_to_jlong(n);
466 JVM_END
467
468
469 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
470 JVMWrapper("JVM_FreeMemory");
471 CollectedHeap* ch = Universe::heap();
472 size_t n;
473 {
474 MutexLocker x(Heap_lock);
475 n = ch->capacity() - ch->used();
476 }
477 return convert_size_t_to_jlong(n);
478 JVM_END
479
480
481 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
482 JVMWrapper("JVM_MaxMemory");
483 size_t n = Universe::heap()->max_capacity();
484 return convert_size_t_to_jlong(n);
485 JVM_END
486
487
488 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
489 JVMWrapper("JVM_ActiveProcessorCount");
490 return os::active_processor_count();
491 JVM_END
492
493
494
495 // java.lang.Throwable //////////////////////////////////////////////////////
496
497
498 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
499 JVMWrapper("JVM_FillInStackTrace");
500 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
501 java_lang_Throwable::fill_in_stack_trace(exception);
502 JVM_END
503
504
505 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
506 JVMWrapper("JVM_PrintStackTrace");
507 // Note: This is no longer used in Merlin, but we still support it for compatibility.
508 oop exception = JNIHandles::resolve_non_null(receiver);
509 oop stream = JNIHandles::resolve_non_null(printable);
510 java_lang_Throwable::print_stack_trace(exception, stream);
511 JVM_END
512
513
514 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
515 JVMWrapper("JVM_GetStackTraceDepth");
516 oop exception = JNIHandles::resolve(throwable);
517 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
518 JVM_END
519
520
521 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
522 JVMWrapper("JVM_GetStackTraceElement");
523 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
524 oop exception = JNIHandles::resolve(throwable);
525 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
526 return JNIHandles::make_local(env, element);
527 JVM_END
528
529
530 // java.lang.Object ///////////////////////////////////////////////
531
532
533 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
534 JVMWrapper("JVM_IHashCode");
535 // as implemented in the classic virtual machine; return 0 if object is NULL
536 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
537 JVM_END
538
539
540 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
541 JVMWrapper("JVM_MonitorWait");
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
543 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
544 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
545 if (JvmtiExport::should_post_monitor_wait()) {
546 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
547
548 // The current thread already owns the monitor and it has not yet
549 // been added to the wait queue so the current thread cannot be
550 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
551 // event handler cannot accidentally consume an unpark() meant for
552 // the ParkEvent associated with this ObjectMonitor.
553 }
554 ObjectSynchronizer::wait(obj, ms, THREAD);
555 JVM_END
556
557
558 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
559 JVMWrapper("JVM_MonitorNotify");
560 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
561 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
562 ObjectSynchronizer::notify(obj, CHECK);
563 JVM_END
564
565
566 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
567 JVMWrapper("JVM_MonitorNotifyAll");
568 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
569 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
570 ObjectSynchronizer::notifyall(obj, CHECK);
571 JVM_END
572
573
574 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
575 JVMWrapper("JVM_Clone");
576 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
577 const KlassHandle klass (THREAD, obj->klass());
578 JvmtiVMObjectAllocEventCollector oam;
579
580 #ifdef ASSERT
581 // Just checking that the cloneable flag is set correct
582 if (obj->is_javaArray()) {
583 guarantee(klass->is_cloneable(), "all arrays are cloneable");
584 } else {
585 guarantee(obj->is_instance(), "should be instanceOop");
586 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
587 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
588 }
589 #endif
590
591 // Check if class of obj supports the Cloneable interface.
592 // All arrays are considered to be cloneable (See JLS 20.1.5)
593 if (!klass->is_cloneable()) {
594 ResourceMark rm(THREAD);
595 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
596 }
597
598 // Make shallow object copy
599 const int size = obj->size();
600 oop new_obj_oop = NULL;
601 if (obj->is_javaArray()) {
602 const int length = ((arrayOop)obj())->length();
603 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
604 } else {
605 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
606 }
607 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
608 // is modifying a reference field in the clonee, a non-oop-atomic copy might
609 // be suspended in the middle of copying the pointer and end up with parts
610 // of two different pointers in the field. Subsequent dereferences will crash.
611 // 4846409: an oop-copy of objects with long or double fields or arrays of same
612 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
613 // of oops. We know objects are aligned on a minimum of an jlong boundary.
614 // The same is true of StubRoutines::object_copy and the various oop_copy
615 // variants, and of the code generated by the inline_native_clone intrinsic.
616 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
617 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
618 (size_t)align_object_size(size) / HeapWordsPerLong);
619 // Clear the header
620 new_obj_oop->init_mark();
621
622 // Store check (mark entire object and let gc sort it out)
623 BarrierSet* bs = Universe::heap()->barrier_set();
624 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
625 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
626
627 Handle new_obj(THREAD, new_obj_oop);
628 // Special handling for MemberNames. Since they contain Method* metadata, they
629 // must be registered so that RedefineClasses can fix metadata contained in them.
630 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
631 java_lang_invoke_MemberName::is_method(new_obj())) {
632 methodOop method = (methodOop)java_lang_invoke_MemberName::vmtarget(new_obj());
633 // MemberName may be unresolved, so doesn't need registration until resolved.
634 if (method != NULL) {
635 // add_member_name() can safepoint: use Handle for method and new_obj:
636 methodHandle m(THREAD, method);
637 instanceKlass::cast(m->method_holder())->add_member_name(new_obj);
638 }
639 }
640
641 // Caution: this involves a java upcall, so the clone should be
642 // "gc-robust" by this stage.
643 if (klass->has_finalizer()) {
644 assert(obj->is_instance(), "should be instanceOop");
645 new_obj_oop = instanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
646 new_obj = Handle(THREAD, new_obj_oop);
647 }
648
649 return JNIHandles::make_local(env, new_obj());
650 JVM_END
651
652 // java.lang.Compiler ////////////////////////////////////////////////////
653
654 // The initial cuts of the HotSpot VM will not support JITs, and all existing
655 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
656 // functions are all silently ignored unless JVM warnings are printed.
657
658 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
659 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
660 JVM_END
661
662
663 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
664 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
665 return JNI_FALSE;
666 JVM_END
667
668
669 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
670 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
671 return JNI_FALSE;
672 JVM_END
673
674
675 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
676 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
677 return JNI_FALSE;
678 JVM_END
679
680
681 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
682 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
683 return NULL;
684 JVM_END
685
686
687 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
688 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
689 JVM_END
690
691
692 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
693 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
694 JVM_END
695
696
697
698 // Error message support //////////////////////////////////////////////////////
699
700 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
701 JVMWrapper("JVM_GetLastErrorString");
702 return (jint)os::lasterror(buf, len);
703 JVM_END
704
705
706 // java.io.File ///////////////////////////////////////////////////////////////
707
708 JVM_LEAF(char*, JVM_NativePath(char* path))
709 JVMWrapper2("JVM_NativePath (%s)", path);
710 return os::native_path(path);
711 JVM_END
712
713
714 // Misc. class handling ///////////////////////////////////////////////////////////
715
716
717 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
718 JVMWrapper("JVM_GetCallerClass");
719 klassOop k = thread->security_get_caller_class(depth);
720 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
721 JVM_END
722
723
724 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
725 JVMWrapper("JVM_FindPrimitiveClass");
726 oop mirror = NULL;
727 BasicType t = name2type(utf);
728 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
729 mirror = Universe::java_mirror(t);
730 }
731 if (mirror == NULL) {
732 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
733 } else {
734 return (jclass) JNIHandles::make_local(env, mirror);
735 }
736 JVM_END
737
738
739 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
740 JVMWrapper("JVM_ResolveClass");
741 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
742 JVM_END
743
744
745 // Returns a class loaded by the bootstrap class loader; or null
746 // if not found. ClassNotFoundException is not thrown.
747 //
748 // Rationale behind JVM_FindClassFromBootLoader
749 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
750 // b> because of (a) java.dll has a direct dependecy on the unexported
751 // private symbol "_JVM_FindClassFromClassLoader@20".
752 // c> the launcher cannot use the private symbol as it dynamically opens
753 // the entry point, so if something changes, the launcher will fail
754 // unexpectedly at runtime, it is safest for the launcher to dlopen a
755 // stable exported interface.
756 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
757 // signature to change from _JVM_FindClassFromClassLoader@20 to
758 // JVM_FindClassFromClassLoader and will not be backward compatible
759 // with older JDKs.
760 // Thus a public/stable exported entry point is the right solution,
761 // public here means public in linker semantics, and is exported only
762 // to the JDK, and is not intended to be a public API.
763
764 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
765 const char* name))
766 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
767
768 // Java libraries should ensure that name is never null...
769 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
770 // It's impossible to create this class; the name cannot fit
771 // into the constant pool.
772 return NULL;
773 }
774
775 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
776 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
777 if (k == NULL) {
778 return NULL;
779 }
780
781 if (TraceClassResolution) {
782 trace_class_resolution(k);
783 }
784 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
785 JVM_END
786
787 // Not used; JVM_FindClassFromCaller replaces this.
788 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
789 jboolean init, jobject loader,
790 jboolean throwError))
791 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
792 throwError ? "error" : "exception");
793 // Java libraries should ensure that name is never null...
794 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
795 // It's impossible to create this class; the name cannot fit
796 // into the constant pool.
797 if (throwError) {
798 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
799 } else {
800 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
801 }
802 }
803 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
804 Handle h_loader(THREAD, JNIHandles::resolve(loader));
805 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
806 Handle(), throwError, THREAD);
807
808 if (TraceClassResolution && result != NULL) {
809 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
810 }
811 return result;
812 JVM_END
813
814 // Find a class with this name in this loader, using the caller's protection domain.
815 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
816 jboolean init, jobject loader,
817 jclass caller))
818 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
819 // Java libraries should ensure that name is never null...
820 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
821 // It's impossible to create this class; the name cannot fit
822 // into the constant pool.
823 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
824 }
825
826 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
827
828 oop loader_oop = JNIHandles::resolve(loader);
829 oop from_class = JNIHandles::resolve(caller);
830 oop protection_domain = NULL;
831 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
832 // NPE. Put it in another way, the bootstrap class loader has all permission and
833 // thus no checkPackageAccess equivalence in the VM class loader.
834 // The caller is also passed as NULL by the java code if there is no security
835 // manager to avoid the performance cost of getting the calling class.
836 if (from_class != NULL && loader_oop != NULL) {
837 protection_domain = instanceKlass::cast(java_lang_Class::as_klassOop(from_class))->protection_domain();
838 }
839
840 Handle h_loader(THREAD, loader_oop);
841 Handle h_prot(THREAD, protection_domain);
842 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
843 h_prot, false, THREAD);
844
845 if (TraceClassResolution && result != NULL) {
846 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
847 }
848 return result;
849 JVM_END
850
851 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
852 jboolean init, jclass from))
853 JVMWrapper2("JVM_FindClassFromClass %s", name);
854 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
855 // It's impossible to create this class; the name cannot fit
856 // into the constant pool.
857 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
858 }
859 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
860 oop from_class_oop = JNIHandles::resolve(from);
861 klassOop from_class = (from_class_oop == NULL)
862 ? (klassOop)NULL
863 : java_lang_Class::as_klassOop(from_class_oop);
864 oop class_loader = NULL;
865 oop protection_domain = NULL;
866 if (from_class != NULL) {
867 class_loader = Klass::cast(from_class)->class_loader();
868 protection_domain = Klass::cast(from_class)->protection_domain();
869 }
870 Handle h_loader(THREAD, class_loader);
871 Handle h_prot (THREAD, protection_domain);
872 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
873 h_prot, true, thread);
874
875 if (TraceClassResolution && result != NULL) {
876 // this function is generally only used for class loading during verification.
877 ResourceMark rm;
878 oop from_mirror = JNIHandles::resolve_non_null(from);
879 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
880 const char * from_name = Klass::cast(from_class)->external_name();
881
882 oop mirror = JNIHandles::resolve_non_null(result);
883 klassOop to_class = java_lang_Class::as_klassOop(mirror);
884 const char * to = Klass::cast(to_class)->external_name();
885 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
886 }
887
888 return result;
889 JVM_END
890
891 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
892 if (loader.is_null()) {
893 return;
894 }
895
896 // check whether the current caller thread holds the lock or not.
897 // If not, increment the corresponding counter
898 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
899 ObjectSynchronizer::owner_self) {
900 counter->inc();
901 }
902 }
903
904 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
905 // and JVM_DefineClassWithSourceCond()
906 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
907 jobject loader, const jbyte *buf,
908 jsize len, jobject pd, const char *source,
909 jboolean verify, TRAPS) {
910 if (source == NULL) source = "__JVM_DefineClass__";
911
912 assert(THREAD->is_Java_thread(), "must be a JavaThread");
913 JavaThread* jt = (JavaThread*) THREAD;
914
915 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
916 ClassLoader::perf_define_appclass_selftime(),
917 ClassLoader::perf_define_appclasses(),
918 jt->get_thread_stat()->perf_recursion_counts_addr(),
919 jt->get_thread_stat()->perf_timers_addr(),
920 PerfClassTraceTime::DEFINE_CLASS);
921
922 if (UsePerfData) {
923 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
924 }
925
926 // Since exceptions can be thrown, class initialization can take place
927 // if name is NULL no check for class name in .class stream has to be made.
928 TempNewSymbol class_name = NULL;
929 if (name != NULL) {
930 const int str_len = (int)strlen(name);
931 if (str_len > Symbol::max_length()) {
932 // It's impossible to create this class; the name cannot fit
933 // into the constant pool.
934 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
935 }
936 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
937 }
938
939 ResourceMark rm(THREAD);
940 ClassFileStream st((u1*) buf, len, (char *)source);
941 Handle class_loader (THREAD, JNIHandles::resolve(loader));
942 if (UsePerfData) {
943 is_lock_held_by_thread(class_loader,
944 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
945 THREAD);
946 }
947 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
948 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
949 protection_domain, &st,
950 verify != 0,
951 CHECK_NULL);
952
953 if (TraceClassResolution && k != NULL) {
954 trace_class_resolution(k);
955 }
956
957 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
958 }
959
960
961 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
962 JVMWrapper2("JVM_DefineClass %s", name);
963
964 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
965 JVM_END
966
967
968 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
969 JVMWrapper2("JVM_DefineClassWithSource %s", name);
970
971 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
972 JVM_END
973
974 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
975 jobject loader, const jbyte *buf,
976 jsize len, jobject pd,
977 const char *source, jboolean verify))
978 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
979
980 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
981 JVM_END
982
983 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
984 JVMWrapper("JVM_FindLoadedClass");
985 ResourceMark rm(THREAD);
986
987 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
988 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
989
990 const char* str = java_lang_String::as_utf8_string(string());
991 // Sanity check, don't expect null
992 if (str == NULL) return NULL;
993
994 const int str_len = (int)strlen(str);
995 if (str_len > Symbol::max_length()) {
996 // It's impossible to create this class; the name cannot fit
997 // into the constant pool.
998 return NULL;
999 }
1000 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1001
1002 // Security Note:
1003 // The Java level wrapper will perform the necessary security check allowing
1004 // us to pass the NULL as the initiating class loader.
1005 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1006 if (UsePerfData) {
1007 is_lock_held_by_thread(h_loader,
1008 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1009 THREAD);
1010 }
1011
1012 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
1013 h_loader,
1014 Handle(),
1015 CHECK_NULL);
1016
1017 return (k == NULL) ? NULL :
1018 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
1019 JVM_END
1020
1021
1022 // Reflection support //////////////////////////////////////////////////////////////////////////////
1023
1024 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1025 assert (cls != NULL, "illegal class");
1026 JVMWrapper("JVM_GetClassName");
1027 JvmtiVMObjectAllocEventCollector oam;
1028 ResourceMark rm(THREAD);
1029 const char* name;
1030 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1031 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1032 } else {
1033 // Consider caching interned string in Klass
1034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1035 assert(k->is_klass(), "just checking");
1036 name = Klass::cast(k)->external_name();
1037 }
1038 oop result = StringTable::intern((char*) name, CHECK_NULL);
1039 return (jstring) JNIHandles::make_local(env, result);
1040 JVM_END
1041
1042
1043 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1044 JVMWrapper("JVM_GetClassInterfaces");
1045 JvmtiVMObjectAllocEventCollector oam;
1046 oop mirror = JNIHandles::resolve_non_null(cls);
1047
1048 // Special handling for primitive objects
1049 if (java_lang_Class::is_primitive(mirror)) {
1050 // Primitive objects does not have any interfaces
1051 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1052 return (jobjectArray) JNIHandles::make_local(env, r);
1053 }
1054
1055 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
1056 // Figure size of result array
1057 int size;
1058 if (klass->oop_is_instance()) {
1059 size = instanceKlass::cast(klass())->local_interfaces()->length();
1060 } else {
1061 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1062 size = 2;
1063 }
1064
1065 // Allocate result array
1066 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1067 objArrayHandle result (THREAD, r);
1068 // Fill in result
1069 if (klass->oop_is_instance()) {
1070 // Regular instance klass, fill in all local interfaces
1071 for (int index = 0; index < size; index++) {
1072 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
1073 result->obj_at_put(index, Klass::cast(k)->java_mirror());
1074 }
1075 } else {
1076 // All arrays implement java.lang.Cloneable and java.io.Serializable
1077 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror());
1078 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror());
1079 }
1080 return (jobjectArray) JNIHandles::make_local(env, result());
1081 JVM_END
1082
1083
1084 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1085 JVMWrapper("JVM_GetClassLoader");
1086 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1087 return NULL;
1088 }
1089 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1090 oop loader = Klass::cast(k)->class_loader();
1091 return JNIHandles::make_local(env, loader);
1092 JVM_END
1093
1094
1095 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1096 JVMWrapper("JVM_IsInterface");
1097 oop mirror = JNIHandles::resolve_non_null(cls);
1098 if (java_lang_Class::is_primitive(mirror)) {
1099 return JNI_FALSE;
1100 }
1101 klassOop k = java_lang_Class::as_klassOop(mirror);
1102 jboolean result = Klass::cast(k)->is_interface();
1103 assert(!result || Klass::cast(k)->oop_is_instance(),
1104 "all interfaces are instance types");
1105 // The compiler intrinsic for isInterface tests the
1106 // Klass::_access_flags bits in the same way.
1107 return result;
1108 JVM_END
1109
1110
1111 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1112 JVMWrapper("JVM_GetClassSigners");
1113 JvmtiVMObjectAllocEventCollector oam;
1114 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1115 // There are no signers for primitive types
1116 return NULL;
1117 }
1118
1119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1120 objArrayOop signers = NULL;
1121 if (Klass::cast(k)->oop_is_instance()) {
1122 signers = instanceKlass::cast(k)->signers();
1123 }
1124
1125 // If there are no signers set in the class, or if the class
1126 // is an array, return NULL.
1127 if (signers == NULL) return NULL;
1128
1129 // copy of the signers array
1130 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
1131 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1132 for (int index = 0; index < signers->length(); index++) {
1133 signers_copy->obj_at_put(index, signers->obj_at(index));
1134 }
1135
1136 // return the copy
1137 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1138 JVM_END
1139
1140
1141 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1142 JVMWrapper("JVM_SetClassSigners");
1143 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1144 // This call is ignored for primitive types and arrays.
1145 // Signers are only set once, ClassLoader.java, and thus shouldn't
1146 // be called with an array. Only the bootstrap loader creates arrays.
1147 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1148 if (Klass::cast(k)->oop_is_instance()) {
1149 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1150 }
1151 }
1152 JVM_END
1153
1154
1155 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1156 JVMWrapper("JVM_GetProtectionDomain");
1157 if (JNIHandles::resolve(cls) == NULL) {
1158 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1159 }
1160
1161 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1162 // Primitive types does not have a protection domain.
1163 return NULL;
1164 }
1165
1166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1167 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
1168 JVM_END
1169
1170
1171 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1172 // still defined in core libraries as of 1.5.
1173 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1174 JVMWrapper("JVM_SetProtectionDomain");
1175 if (JNIHandles::resolve(cls) == NULL) {
1176 THROW(vmSymbols::java_lang_NullPointerException());
1177 }
1178 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1179 // Call is ignored for primitive types
1180 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1181
1182 // cls won't be an array, as this called only from ClassLoader.defineClass
1183 if (Klass::cast(k)->oop_is_instance()) {
1184 oop pd = JNIHandles::resolve(protection_domain);
1185 assert(pd == NULL || pd->is_oop(), "just checking");
1186 instanceKlass::cast(k)->set_protection_domain(pd);
1187 }
1188 }
1189 JVM_END
1190
1191 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1192 // If there is a security manager and protection domain, check the access
1193 // in the protection domain, otherwise it is authorized.
1194 if (java_lang_System::has_security_manager()) {
1195
1196 // For bootstrapping, if pd implies method isn't in the JDK, allow
1197 // this context to revert to older behavior.
1198 // In this case the isAuthorized field in AccessControlContext is also not
1199 // present.
1200 if (Universe::protection_domain_implies_method() == NULL) {
1201 return true;
1202 }
1203
1204 // Whitelist certain access control contexts
1205 if (java_security_AccessControlContext::is_authorized(context)) {
1206 return true;
1207 }
1208
1209 oop prot = klass->protection_domain();
1210 if (prot != NULL) {
1211 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1212 // in the new wrapper.
1213 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1214 Handle h_prot(THREAD, prot);
1215 JavaValue result(T_BOOLEAN);
1216 JavaCallArguments args(h_prot);
1217 JavaCalls::call(&result, m, &args, CHECK_false);
1218 return (result.get_jboolean() != 0);
1219 }
1220 }
1221 return true;
1222 }
1223
1224 // Create an AccessControlContext with a protection domain with null codesource
1225 // and null permissions - which gives no permissions.
1226 oop create_dummy_access_control_context(TRAPS) {
1227 instanceKlassHandle pd_klass (THREAD, SystemDictionary::ProtectionDomain_klass());
1228 // new ProtectionDomain(null,null);
1229 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1230 Handle null_pd(THREAD, null_protection_domain);
1231
1232 // new ProtectionDomain[] {pd};
1233 objArrayOop context = oopFactory::new_objArray(pd_klass(), 1, CHECK_NULL);
1234 context->obj_at_put(0, null_pd());
1235
1236 // new AccessControlContext(new ProtectionDomain[] {pd})
1237 objArrayHandle h_context(THREAD, context);
1238 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1239 return result;
1240 }
1241
1242
1243 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1244 JVMWrapper("JVM_DoPrivileged");
1245
1246 if (action == NULL) {
1247 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1248 }
1249
1250
1251 // Compute the frame initiating the do privileged operation and setup the privileged stack
1252 vframeStream vfst(thread);
1253 vfst.security_get_caller_frame(1);
1254
1255 if (vfst.at_end()) {
1256 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1257 }
1258
1259 methodOop method = vfst.method();
1260 instanceKlassHandle klass (THREAD, method->method_holder());
1261
1262 // Check that action object understands "Object run()"
1263 Handle h_context;
1264 if (context != NULL) {
1265 h_context = Handle(THREAD, JNIHandles::resolve(context));
1266 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1267 if (!authorized) {
1268 // Create an unprivileged access control object and call it's run function
1269 // instead.
1270 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1271 h_context = Handle(THREAD, noprivs);
1272 }
1273 }
1274
1275 // Check that action object understands "Object run()"
1276 Handle object (THREAD, JNIHandles::resolve(action));
1277
1278 // get run() method
1279 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1280 vmSymbols::run_method_name(),
1281 vmSymbols::void_object_signature());
1282 methodHandle m (THREAD, m_oop);
1283 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1284 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1285 }
1286
1287 // Stack allocated list of privileged stack elements
1288 PrivilegedElement pi;
1289
1290 if (!vfst.at_end()) {
1291 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1292 thread->set_privileged_stack_top(&pi);
1293 }
1294
1295
1296 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1297 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1298 Handle pending_exception;
1299 JavaValue result(T_OBJECT);
1300 JavaCallArguments args(object);
1301 JavaCalls::call(&result, m, &args, THREAD);
1302
1303 // done with action, remove ourselves from the list
1304 if (!vfst.at_end()) {
1305 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1306 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1307 }
1308
1309 if (HAS_PENDING_EXCEPTION) {
1310 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1311 CLEAR_PENDING_EXCEPTION;
1312
1313 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1314 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1315 // Throw a java.security.PrivilegedActionException(Exception e) exception
1316 JavaCallArguments args(pending_exception);
1317 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1318 vmSymbols::exception_void_signature(),
1319 &args);
1320 }
1321 }
1322
1323 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1324 return JNIHandles::make_local(env, (oop) result.get_jobject());
1325 JVM_END
1326
1327
1328 // Returns the inherited_access_control_context field of the running thread.
1329 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1330 JVMWrapper("JVM_GetInheritedAccessControlContext");
1331 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1332 return JNIHandles::make_local(env, result);
1333 JVM_END
1334
1335 class RegisterArrayForGC {
1336 private:
1337 JavaThread *_thread;
1338 public:
1339 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1340 _thread = thread;
1341 _thread->register_array_for_gc(array);
1342 }
1343
1344 ~RegisterArrayForGC() {
1345 _thread->register_array_for_gc(NULL);
1346 }
1347 };
1348
1349
1350 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1351 JVMWrapper("JVM_GetStackAccessControlContext");
1352 if (!UsePrivilegedStack) return NULL;
1353
1354 ResourceMark rm(THREAD);
1355 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1356 JvmtiVMObjectAllocEventCollector oam;
1357
1358 // count the protection domains on the execution stack. We collapse
1359 // duplicate consecutive protection domains into a single one, as
1360 // well as stopping when we hit a privileged frame.
1361
1362 // Use vframeStream to iterate through Java frames
1363 vframeStream vfst(thread);
1364
1365 oop previous_protection_domain = NULL;
1366 Handle privileged_context(thread, NULL);
1367 bool is_privileged = false;
1368 oop protection_domain = NULL;
1369
1370 for(; !vfst.at_end(); vfst.next()) {
1371 // get method of frame
1372 methodOop method = vfst.method();
1373 intptr_t* frame_id = vfst.frame_id();
1374
1375 // check the privileged frames to see if we have a match
1376 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1377 // this frame is privileged
1378 is_privileged = true;
1379 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1380 protection_domain = thread->privileged_stack_top()->protection_domain();
1381 } else {
1382 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1383 }
1384
1385 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1386 local_array->push(protection_domain);
1387 previous_protection_domain = protection_domain;
1388 }
1389
1390 if (is_privileged) break;
1391 }
1392
1393
1394 // either all the domains on the stack were system domains, or
1395 // we had a privileged system domain
1396 if (local_array->is_empty()) {
1397 if (is_privileged && privileged_context.is_null()) return NULL;
1398
1399 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1400 return JNIHandles::make_local(env, result);
1401 }
1402
1403 // the resource area must be registered in case of a gc
1404 RegisterArrayForGC ragc(thread, local_array);
1405 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1406 local_array->length(), CHECK_NULL);
1407 objArrayHandle h_context(thread, context);
1408 for (int index = 0; index < local_array->length(); index++) {
1409 h_context->obj_at_put(index, local_array->at(index));
1410 }
1411
1412 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1413
1414 return JNIHandles::make_local(env, result);
1415 JVM_END
1416
1417
1418 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1419 JVMWrapper("JVM_IsArrayClass");
1420 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1421 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1422 JVM_END
1423
1424
1425 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1426 JVMWrapper("JVM_IsPrimitiveClass");
1427 oop mirror = JNIHandles::resolve_non_null(cls);
1428 return (jboolean) java_lang_Class::is_primitive(mirror);
1429 JVM_END
1430
1431
1432 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1433 JVMWrapper("JVM_GetComponentType");
1434 oop mirror = JNIHandles::resolve_non_null(cls);
1435 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1436 return (jclass) JNIHandles::make_local(env, result);
1437 JVM_END
1438
1439
1440 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1441 JVMWrapper("JVM_GetClassModifiers");
1442 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1443 // Primitive type
1444 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1445 }
1446
1447 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1448 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1449 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1450 return k->modifier_flags();
1451 JVM_END
1452
1453
1454 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1455
1456 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1457 JvmtiVMObjectAllocEventCollector oam;
1458 // ofClass is a reference to a java_lang_Class object. The mirror object
1459 // of an instanceKlass
1460
1461 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1462 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1463 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1464 return (jobjectArray)JNIHandles::make_local(env, result);
1465 }
1466
1467 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1468 InnerClassesIterator iter(k);
1469
1470 if (iter.length() == 0) {
1471 // Neither an inner nor outer class
1472 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1473 return (jobjectArray)JNIHandles::make_local(env, result);
1474 }
1475
1476 // find inner class info
1477 constantPoolHandle cp(thread, k->constants());
1478 int length = iter.length();
1479
1480 // Allocate temp. result array
1481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1482 objArrayHandle result (THREAD, r);
1483 int members = 0;
1484
1485 for (; !iter.done(); iter.next()) {
1486 int ioff = iter.inner_class_info_index();
1487 int ooff = iter.outer_class_info_index();
1488
1489 if (ioff != 0 && ooff != 0) {
1490 // Check to see if the name matches the class we're looking for
1491 // before attempting to find the class.
1492 if (cp->klass_name_at_matches(k, ooff)) {
1493 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1494 if (outer_klass == k()) {
1495 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1496 instanceKlassHandle inner_klass (THREAD, ik);
1497
1498 // Throws an exception if outer klass has not declared k as
1499 // an inner klass
1500 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1501
1502 result->obj_at_put(members, inner_klass->java_mirror());
1503 members++;
1504 }
1505 }
1506 }
1507 }
1508
1509 if (members != length) {
1510 // Return array of right length
1511 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1512 for(int i = 0; i < members; i++) {
1513 res->obj_at_put(i, result->obj_at(i));
1514 }
1515 return (jobjectArray)JNIHandles::make_local(env, res);
1516 }
1517
1518 return (jobjectArray)JNIHandles::make_local(env, result());
1519 JVM_END
1520
1521
1522 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1523 {
1524 // ofClass is a reference to a java_lang_Class object.
1525 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1526 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1527 return NULL;
1528 }
1529
1530 bool inner_is_member = false;
1531 klassOop outer_klass
1532 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1533 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1534 if (outer_klass == NULL) return NULL; // already a top-level class
1535 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1536 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1537 }
1538 JVM_END
1539
1540 // should be in instanceKlass.cpp, but is here for historical reasons
1541 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1542 bool* inner_is_member,
1543 TRAPS) {
1544 Thread* thread = THREAD;
1545 InnerClassesIterator iter(k);
1546 if (iter.length() == 0) {
1547 // No inner class info => no declaring class
1548 return NULL;
1549 }
1550
1551 constantPoolHandle i_cp(thread, k->constants());
1552
1553 bool found = false;
1554 klassOop ok;
1555 instanceKlassHandle outer_klass;
1556 *inner_is_member = false;
1557
1558 // Find inner_klass attribute
1559 for (; !iter.done() && !found; iter.next()) {
1560 int ioff = iter.inner_class_info_index();
1561 int ooff = iter.outer_class_info_index();
1562 int noff = iter.inner_name_index();
1563 if (ioff != 0) {
1564 // Check to see if the name matches the class we're looking for
1565 // before attempting to find the class.
1566 if (i_cp->klass_name_at_matches(k, ioff)) {
1567 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1568 found = (k() == inner_klass);
1569 if (found && ooff != 0) {
1570 ok = i_cp->klass_at(ooff, CHECK_NULL);
1571 outer_klass = instanceKlassHandle(thread, ok);
1572 *inner_is_member = true;
1573 }
1574 }
1575 }
1576 }
1577
1578 if (found && outer_klass.is_null()) {
1579 // It may be anonymous; try for that.
1580 int encl_method_class_idx = k->enclosing_method_class_index();
1581 if (encl_method_class_idx != 0) {
1582 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1583 outer_klass = instanceKlassHandle(thread, ok);
1584 *inner_is_member = false;
1585 }
1586 }
1587
1588 // If no inner class attribute found for this class.
1589 if (outer_klass.is_null()) return NULL;
1590
1591 // Throws an exception if outer klass has not declared k as an inner klass
1592 // We need evidence that each klass knows about the other, or else
1593 // the system could allow a spoof of an inner class to gain access rights.
1594 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1595 return outer_klass();
1596 }
1597
1598 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1599 assert (cls != NULL, "illegal class");
1600 JVMWrapper("JVM_GetClassSignature");
1601 JvmtiVMObjectAllocEventCollector oam;
1602 ResourceMark rm(THREAD);
1603 // Return null for arrays and primatives
1604 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1605 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1606 if (Klass::cast(k)->oop_is_instance()) {
1607 Symbol* sym = instanceKlass::cast(k)->generic_signature();
1608 if (sym == NULL) return NULL;
1609 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1610 return (jstring) JNIHandles::make_local(env, str());
1611 }
1612 }
1613 return NULL;
1614 JVM_END
1615
1616
1617 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1618 assert (cls != NULL, "illegal class");
1619 JVMWrapper("JVM_GetClassAnnotations");
1620 ResourceMark rm(THREAD);
1621 // Return null for arrays and primitives
1622 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1623 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1624 if (Klass::cast(k)->oop_is_instance()) {
1625 return (jbyteArray) JNIHandles::make_local(env,
1626 instanceKlass::cast(k)->class_annotations());
1627 }
1628 }
1629 return NULL;
1630 JVM_END
1631
1632
1633 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1634 assert(field != NULL, "illegal field");
1635 JVMWrapper("JVM_GetFieldAnnotations");
1636
1637 // some of this code was adapted from from jni_FromReflectedField
1638
1639 // field is a handle to a java.lang.reflect.Field object
1640 oop reflected = JNIHandles::resolve_non_null(field);
1641 oop mirror = java_lang_reflect_Field::clazz(reflected);
1642 klassOop k = java_lang_Class::as_klassOop(mirror);
1643 int slot = java_lang_reflect_Field::slot(reflected);
1644 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1645
1646 fieldDescriptor fd;
1647 KlassHandle kh(THREAD, k);
1648 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot);
1649
1650 if (modifiers & JVM_ACC_STATIC) {
1651 // for static fields we only look in the current class
1652 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1653 true, &fd)) {
1654 assert(false, "cannot find static field");
1655 return NULL; // robustness
1656 }
1657 } else {
1658 // for instance fields we start with the current class and work
1659 // our way up through the superclass chain
1660 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1661 &fd)) {
1662 assert(false, "cannot find instance field");
1663 return NULL; // robustness
1664 }
1665 }
1666
1667 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1668 JVM_END
1669
1670
1671 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1672 // some of this code was adapted from from jni_FromReflectedMethod
1673
1674 oop reflected = JNIHandles::resolve_non_null(method);
1675 oop mirror = NULL;
1676 int slot = 0;
1677
1678 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1679 mirror = java_lang_reflect_Constructor::clazz(reflected);
1680 slot = java_lang_reflect_Constructor::slot(reflected);
1681 } else {
1682 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1683 "wrong type");
1684 mirror = java_lang_reflect_Method::clazz(reflected);
1685 slot = java_lang_reflect_Method::slot(reflected);
1686 }
1687 klassOop k = java_lang_Class::as_klassOop(mirror);
1688
1689 KlassHandle kh(THREAD, k);
1690 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1691 if (m == NULL) {
1692 assert(false, "cannot find method");
1693 return NULL; // robustness
1694 }
1695
1696 return m;
1697 }
1698
1699
1700 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1701 JVMWrapper("JVM_GetMethodAnnotations");
1702
1703 // method is a handle to a java.lang.reflect.Method object
1704 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1705 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1706 JVM_END
1707
1708
1709 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1710 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1711
1712 // method is a handle to a java.lang.reflect.Method object
1713 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1714 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1715 JVM_END
1716
1717
1718 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1719 JVMWrapper("JVM_GetMethodParameterAnnotations");
1720
1721 // method is a handle to a java.lang.reflect.Method object
1722 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1723 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1724 JVM_END
1725
1726
1727 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1728
1729 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1730 {
1731 JVMWrapper("JVM_GetClassDeclaredFields");
1732 JvmtiVMObjectAllocEventCollector oam;
1733
1734 // Exclude primitive types and array types
1735 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1736 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1737 // Return empty array
1738 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1739 return (jobjectArray) JNIHandles::make_local(env, res);
1740 }
1741
1742 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1743 constantPoolHandle cp(THREAD, k->constants());
1744
1745 // Ensure class is linked
1746 k->link_class(CHECK_NULL);
1747
1748 // 4496456 We need to filter out java.lang.Throwable.backtrace
1749 bool skip_backtrace = false;
1750
1751 // Allocate result
1752 int num_fields;
1753
1754 if (publicOnly) {
1755 num_fields = 0;
1756 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1757 if (fs.access_flags().is_public()) ++num_fields;
1758 }
1759 } else {
1760 num_fields = k->java_fields_count();
1761
1762 if (k() == SystemDictionary::Throwable_klass()) {
1763 num_fields--;
1764 skip_backtrace = true;
1765 }
1766 }
1767
1768 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1769 objArrayHandle result (THREAD, r);
1770
1771 int out_idx = 0;
1772 fieldDescriptor fd;
1773 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1774 if (skip_backtrace) {
1775 // 4496456 skip java.lang.Throwable.backtrace
1776 int offset = fs.offset();
1777 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1778 }
1779
1780 if (!publicOnly || fs.access_flags().is_public()) {
1781 fd.initialize(k(), fs.index());
1782 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1783 result->obj_at_put(out_idx, field);
1784 ++out_idx;
1785 }
1786 }
1787 assert(out_idx == num_fields, "just checking");
1788 return (jobjectArray) JNIHandles::make_local(env, result());
1789 }
1790 JVM_END
1791
1792 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1793 {
1794 JVMWrapper("JVM_GetClassDeclaredMethods");
1795 JvmtiVMObjectAllocEventCollector oam;
1796
1797 // Exclude primitive types and array types
1798 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1799 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1800 // Return empty array
1801 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1802 return (jobjectArray) JNIHandles::make_local(env, res);
1803 }
1804
1805 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1806
1807 // Ensure class is linked
1808 k->link_class(CHECK_NULL);
1809
1810 objArrayHandle methods (THREAD, k->methods());
1811 int methods_length = methods->length();
1812 int num_methods = 0;
1813
1814 int i;
1815 for (i = 0; i < methods_length; i++) {
1816 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1817 if (!method->is_initializer()) {
1818 if (!publicOnly || method->is_public()) {
1819 ++num_methods;
1820 }
1821 }
1822 }
1823
1824 // Allocate result
1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1826 objArrayHandle result (THREAD, r);
1827
1828 int out_idx = 0;
1829 for (i = 0; i < methods_length; i++) {
1830 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1831 if (!method->is_initializer()) {
1832 if (!publicOnly || method->is_public()) {
1833 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1834 result->obj_at_put(out_idx, m);
1835 ++out_idx;
1836 }
1837 }
1838 }
1839 assert(out_idx == num_methods, "just checking");
1840 return (jobjectArray) JNIHandles::make_local(env, result());
1841 }
1842 JVM_END
1843
1844 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1845 {
1846 JVMWrapper("JVM_GetClassDeclaredConstructors");
1847 JvmtiVMObjectAllocEventCollector oam;
1848
1849 // Exclude primitive types and array types
1850 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1851 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1852 // Return empty array
1853 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1854 return (jobjectArray) JNIHandles::make_local(env, res);
1855 }
1856
1857 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1858
1859 // Ensure class is linked
1860 k->link_class(CHECK_NULL);
1861
1862 objArrayHandle methods (THREAD, k->methods());
1863 int methods_length = methods->length();
1864 int num_constructors = 0;
1865
1866 int i;
1867 for (i = 0; i < methods_length; i++) {
1868 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1869 if (method->is_initializer() && !method->is_static()) {
1870 if (!publicOnly || method->is_public()) {
1871 ++num_constructors;
1872 }
1873 }
1874 }
1875
1876 // Allocate result
1877 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1878 objArrayHandle result(THREAD, r);
1879
1880 int out_idx = 0;
1881 for (i = 0; i < methods_length; i++) {
1882 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1883 if (method->is_initializer() && !method->is_static()) {
1884 if (!publicOnly || method->is_public()) {
1885 oop m = Reflection::new_constructor(method, CHECK_NULL);
1886 result->obj_at_put(out_idx, m);
1887 ++out_idx;
1888 }
1889 }
1890 }
1891 assert(out_idx == num_constructors, "just checking");
1892 return (jobjectArray) JNIHandles::make_local(env, result());
1893 }
1894 JVM_END
1895
1896 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1897 {
1898 JVMWrapper("JVM_GetClassAccessFlags");
1899 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1900 // Primitive type
1901 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1902 }
1903
1904 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1905 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1906 }
1907 JVM_END
1908
1909
1910 // Constant pool access //////////////////////////////////////////////////////////
1911
1912 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1913 {
1914 JVMWrapper("JVM_GetClassConstantPool");
1915 JvmtiVMObjectAllocEventCollector oam;
1916
1917 // Return null for primitives and arrays
1918 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1919 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1920 if (Klass::cast(k)->oop_is_instance()) {
1921 instanceKlassHandle k_h(THREAD, k);
1922 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1923 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1924 return JNIHandles::make_local(jcp());
1925 }
1926 }
1927 return NULL;
1928 }
1929 JVM_END
1930
1931
1932 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1933 {
1934 JVMWrapper("JVM_ConstantPoolGetSize");
1935 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1936 return cp->length();
1937 }
1938 JVM_END
1939
1940
1941 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1942 if (!cp->is_within_bounds(index)) {
1943 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1944 }
1945 }
1946
1947
1948 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1949 {
1950 JVMWrapper("JVM_ConstantPoolGetClassAt");
1951 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1952 bounds_check(cp, index, CHECK_NULL);
1953 constantTag tag = cp->tag_at(index);
1954 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1955 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1956 }
1957 klassOop k = cp->klass_at(index, CHECK_NULL);
1958 return (jclass) JNIHandles::make_local(k->java_mirror());
1959 }
1960 JVM_END
1961
1962
1963 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1964 {
1965 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1966 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1967 bounds_check(cp, index, CHECK_NULL);
1968 constantTag tag = cp->tag_at(index);
1969 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1971 }
1972 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1973 if (k == NULL) return NULL;
1974 return (jclass) JNIHandles::make_local(k->java_mirror());
1975 }
1976 JVM_END
1977
1978 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1979 constantTag tag = cp->tag_at(index);
1980 if (!tag.is_method() && !tag.is_interface_method()) {
1981 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1982 }
1983 int klass_ref = cp->uncached_klass_ref_index_at(index);
1984 klassOop k_o;
1985 if (force_resolution) {
1986 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1987 } else {
1988 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1989 if (k_o == NULL) return NULL;
1990 }
1991 instanceKlassHandle k(THREAD, k_o);
1992 Symbol* name = cp->uncached_name_ref_at(index);
1993 Symbol* sig = cp->uncached_signature_ref_at(index);
1994 methodHandle m (THREAD, k->find_method(name, sig));
1995 if (m.is_null()) {
1996 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1997 }
1998 oop method;
1999 if (!m->is_initializer() || m->is_static()) {
2000 method = Reflection::new_method(m, true, true, CHECK_NULL);
2001 } else {
2002 method = Reflection::new_constructor(m, CHECK_NULL);
2003 }
2004 return JNIHandles::make_local(method);
2005 }
2006
2007 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2008 {
2009 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2010 JvmtiVMObjectAllocEventCollector oam;
2011 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2012 bounds_check(cp, index, CHECK_NULL);
2013 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2014 return res;
2015 }
2016 JVM_END
2017
2018 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2019 {
2020 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2021 JvmtiVMObjectAllocEventCollector oam;
2022 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2023 bounds_check(cp, index, CHECK_NULL);
2024 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2025 return res;
2026 }
2027 JVM_END
2028
2029 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2030 constantTag tag = cp->tag_at(index);
2031 if (!tag.is_field()) {
2032 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2033 }
2034 int klass_ref = cp->uncached_klass_ref_index_at(index);
2035 klassOop k_o;
2036 if (force_resolution) {
2037 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2038 } else {
2039 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
2040 if (k_o == NULL) return NULL;
2041 }
2042 instanceKlassHandle k(THREAD, k_o);
2043 Symbol* name = cp->uncached_name_ref_at(index);
2044 Symbol* sig = cp->uncached_signature_ref_at(index);
2045 fieldDescriptor fd;
2046 klassOop target_klass = k->find_field(name, sig, &fd);
2047 if (target_klass == NULL) {
2048 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2049 }
2050 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2051 return JNIHandles::make_local(field);
2052 }
2053
2054 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2055 {
2056 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2057 JvmtiVMObjectAllocEventCollector oam;
2058 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2059 bounds_check(cp, index, CHECK_NULL);
2060 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2061 return res;
2062 }
2063 JVM_END
2064
2065 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2066 {
2067 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2068 JvmtiVMObjectAllocEventCollector oam;
2069 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2070 bounds_check(cp, index, CHECK_NULL);
2071 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2072 return res;
2073 }
2074 JVM_END
2075
2076 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2077 {
2078 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2079 JvmtiVMObjectAllocEventCollector oam;
2080 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2081 bounds_check(cp, index, CHECK_NULL);
2082 constantTag tag = cp->tag_at(index);
2083 if (!tag.is_field_or_method()) {
2084 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2085 }
2086 int klass_ref = cp->uncached_klass_ref_index_at(index);
2087 Symbol* klass_name = cp->klass_name_at(klass_ref);
2088 Symbol* member_name = cp->uncached_name_ref_at(index);
2089 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2090 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2091 objArrayHandle dest(THREAD, dest_o);
2092 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2093 dest->obj_at_put(0, str());
2094 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2095 dest->obj_at_put(1, str());
2096 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2097 dest->obj_at_put(2, str());
2098 return (jobjectArray) JNIHandles::make_local(dest());
2099 }
2100 JVM_END
2101
2102 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2103 {
2104 JVMWrapper("JVM_ConstantPoolGetIntAt");
2105 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2106 bounds_check(cp, index, CHECK_0);
2107 constantTag tag = cp->tag_at(index);
2108 if (!tag.is_int()) {
2109 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2110 }
2111 return cp->int_at(index);
2112 }
2113 JVM_END
2114
2115 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetLongAt");
2118 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2119 bounds_check(cp, index, CHECK_(0L));
2120 constantTag tag = cp->tag_at(index);
2121 if (!tag.is_long()) {
2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123 }
2124 return cp->long_at(index);
2125 }
2126 JVM_END
2127
2128 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2129 {
2130 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2131 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2132 bounds_check(cp, index, CHECK_(0.0f));
2133 constantTag tag = cp->tag_at(index);
2134 if (!tag.is_float()) {
2135 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2136 }
2137 return cp->float_at(index);
2138 }
2139 JVM_END
2140
2141 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2142 {
2143 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2144 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2145 bounds_check(cp, index, CHECK_(0.0));
2146 constantTag tag = cp->tag_at(index);
2147 if (!tag.is_double()) {
2148 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2149 }
2150 return cp->double_at(index);
2151 }
2152 JVM_END
2153
2154 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2155 {
2156 JVMWrapper("JVM_ConstantPoolGetStringAt");
2157 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2158 bounds_check(cp, index, CHECK_NULL);
2159 constantTag tag = cp->tag_at(index);
2160 if (!tag.is_string() && !tag.is_unresolved_string()) {
2161 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2162 }
2163 oop str = cp->string_at(index, CHECK_NULL);
2164 return (jstring) JNIHandles::make_local(str);
2165 }
2166 JVM_END
2167
2168 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
2169 {
2170 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2171 JvmtiVMObjectAllocEventCollector oam;
2172 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
2173 bounds_check(cp, index, CHECK_NULL);
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_symbol()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 Symbol* sym = cp->symbol_at(index);
2179 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2180 return (jstring) JNIHandles::make_local(str());
2181 }
2182 JVM_END
2183
2184
2185 // Assertion support. //////////////////////////////////////////////////////////
2186
2187 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2188 JVMWrapper("JVM_DesiredAssertionStatus");
2189 assert(cls != NULL, "bad class");
2190
2191 oop r = JNIHandles::resolve(cls);
2192 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2193 if (java_lang_Class::is_primitive(r)) return false;
2194
2195 klassOop k = java_lang_Class::as_klassOop(r);
2196 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
2197 if (! Klass::cast(k)->oop_is_instance()) return false;
2198
2199 ResourceMark rm(THREAD);
2200 const char* name = Klass::cast(k)->name()->as_C_string();
2201 bool system_class = Klass::cast(k)->class_loader() == NULL;
2202 return JavaAssertions::enabled(name, system_class);
2203
2204 JVM_END
2205
2206
2207 // Return a new AssertionStatusDirectives object with the fields filled in with
2208 // command-line assertion arguments (i.e., -ea, -da).
2209 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2210 JVMWrapper("JVM_AssertionStatusDirectives");
2211 JvmtiVMObjectAllocEventCollector oam;
2212 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2213 return JNIHandles::make_local(env, asd);
2214 JVM_END
2215
2216 // Verification ////////////////////////////////////////////////////////////////////////////////
2217
2218 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2219
2220 // RedefineClasses support: bug 6214132 caused verification to fail.
2221 // All functions from this section should call the jvmtiThreadSate function:
2222 // klassOop class_to_verify_considering_redefinition(klassOop klass).
2223 // The function returns a klassOop of the _scratch_class if the verifier
2224 // was invoked in the middle of the class redefinition.
2225 // Otherwise it returns its argument value which is the _the_class klassOop.
2226 // Please, refer to the description in the jvmtiThreadSate.hpp.
2227
2228 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2229 JVMWrapper("JVM_GetClassNameUTF");
2230 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232 return Klass::cast(k)->name()->as_utf8();
2233 JVM_END
2234
2235
2236 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2237 JVMWrapper("JVM_GetClassCPTypes");
2238 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2239 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2240 // types will have length zero if this is not an instanceKlass
2241 // (length is determined by call to JVM_GetClassCPEntriesCount)
2242 if (Klass::cast(k)->oop_is_instance()) {
2243 constantPoolOop cp = instanceKlass::cast(k)->constants();
2244 for (int index = cp->length() - 1; index >= 0; index--) {
2245 constantTag tag = cp->tag_at(index);
2246 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2247 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2248 }
2249 }
2250 JVM_END
2251
2252
2253 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2254 JVMWrapper("JVM_GetClassCPEntriesCount");
2255 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2256 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2257 if (!Klass::cast(k)->oop_is_instance())
2258 return 0;
2259 return instanceKlass::cast(k)->constants()->length();
2260 JVM_END
2261
2262
2263 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2264 JVMWrapper("JVM_GetClassFieldsCount");
2265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2266 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2267 if (!Klass::cast(k)->oop_is_instance())
2268 return 0;
2269 return instanceKlass::cast(k)->java_fields_count();
2270 JVM_END
2271
2272
2273 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2274 JVMWrapper("JVM_GetClassMethodsCount");
2275 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2276 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2277 if (!Klass::cast(k)->oop_is_instance())
2278 return 0;
2279 return instanceKlass::cast(k)->methods()->length();
2280 JVM_END
2281
2282
2283 // The following methods, used for the verifier, are never called with
2284 // array klasses, so a direct cast to instanceKlass is safe.
2285 // Typically, these methods are called in a loop with bounds determined
2286 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2287 // zero for arrays.
2288 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2289 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2290 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2291 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2292 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2293 int length = methodOop(method)->checked_exceptions_length();
2294 if (length > 0) {
2295 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2296 for (int i = 0; i < length; i++) {
2297 exceptions[i] = table[i].class_cp_index;
2298 }
2299 }
2300 JVM_END
2301
2302
2303 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2304 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2305 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2308 return methodOop(method)->checked_exceptions_length();
2309 JVM_END
2310
2311
2312 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2313 JVMWrapper("JVM_GetMethodIxByteCode");
2314 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2317 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2318 JVM_END
2319
2320
2321 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2322 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2323 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2324 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2325 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2326 return methodOop(method)->code_size();
2327 JVM_END
2328
2329
2330 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2331 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2332 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2335 ExceptionTable extable((methodOop(method)));
2336 entry->start_pc = extable.start_pc(entry_index);
2337 entry->end_pc = extable.end_pc(entry_index);
2338 entry->handler_pc = extable.handler_pc(entry_index);
2339 entry->catchType = extable.catch_type_index(entry_index);
2340 JVM_END
2341
2342
2343 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2344 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2345 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2348 return methodOop(method)->exception_table_length();
2349 JVM_END
2350
2351
2352 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2353 JVMWrapper("JVM_GetMethodIxModifiers");
2354 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2357 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2358 JVM_END
2359
2360
2361 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2362 JVMWrapper("JVM_GetFieldIxModifiers");
2363 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2364 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2366 JVM_END
2367
2368
2369 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2370 JVMWrapper("JVM_GetMethodIxLocalsCount");
2371 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2373 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2374 return methodOop(method)->max_locals();
2375 JVM_END
2376
2377
2378 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2379 JVMWrapper("JVM_GetMethodIxArgsSize");
2380 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2383 return methodOop(method)->size_of_parameters();
2384 JVM_END
2385
2386
2387 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2388 JVMWrapper("JVM_GetMethodIxMaxStack");
2389 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2390 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2391 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2392 return methodOop(method)->verifier_max_stack();
2393 JVM_END
2394
2395
2396 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2397 JVMWrapper("JVM_IsConstructorIx");
2398 ResourceMark rm(THREAD);
2399 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2401 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2402 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2403 JVM_END
2404
2405
2406 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2407 JVMWrapper("JVM_GetMethodIxIxUTF");
2408 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2411 return methodOop(method)->name()->as_utf8();
2412 JVM_END
2413
2414
2415 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2416 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2417 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2420 return methodOop(method)->signature()->as_utf8();
2421 JVM_END
2422
2423 /**
2424 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2425 * read entries in the constant pool. Since the old verifier always
2426 * works on a copy of the code, it will not see any rewriting that
2427 * may possibly occur in the middle of verification. So it is important
2428 * that nothing it calls tries to use the cpCache instead of the raw
2429 * constant pool, so we must use cp->uncached_x methods when appropriate.
2430 */
2431 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2432 JVMWrapper("JVM_GetCPFieldNameUTF");
2433 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2434 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2435 constantPoolOop cp = instanceKlass::cast(k)->constants();
2436 switch (cp->tag_at(cp_index).value()) {
2437 case JVM_CONSTANT_Fieldref:
2438 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2439 default:
2440 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2441 }
2442 ShouldNotReachHere();
2443 return NULL;
2444 JVM_END
2445
2446
2447 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2448 JVMWrapper("JVM_GetCPMethodNameUTF");
2449 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 constantPoolOop cp = instanceKlass::cast(k)->constants();
2452 switch (cp->tag_at(cp_index).value()) {
2453 case JVM_CONSTANT_InterfaceMethodref:
2454 case JVM_CONSTANT_Methodref:
2455 case JVM_CONSTANT_NameAndType: // for invokedynamic
2456 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2457 default:
2458 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2459 }
2460 ShouldNotReachHere();
2461 return NULL;
2462 JVM_END
2463
2464
2465 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2466 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2467 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2469 constantPoolOop cp = instanceKlass::cast(k)->constants();
2470 switch (cp->tag_at(cp_index).value()) {
2471 case JVM_CONSTANT_InterfaceMethodref:
2472 case JVM_CONSTANT_Methodref:
2473 case JVM_CONSTANT_NameAndType: // for invokedynamic
2474 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2475 default:
2476 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2477 }
2478 ShouldNotReachHere();
2479 return NULL;
2480 JVM_END
2481
2482
2483 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2484 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2485 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2486 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2487 constantPoolOop cp = instanceKlass::cast(k)->constants();
2488 switch (cp->tag_at(cp_index).value()) {
2489 case JVM_CONSTANT_Fieldref:
2490 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2491 default:
2492 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2493 }
2494 ShouldNotReachHere();
2495 return NULL;
2496 JVM_END
2497
2498
2499 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2500 JVMWrapper("JVM_GetCPClassNameUTF");
2501 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2503 constantPoolOop cp = instanceKlass::cast(k)->constants();
2504 Symbol* classname = cp->klass_name_at(cp_index);
2505 return classname->as_utf8();
2506 JVM_END
2507
2508
2509 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2510 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2511 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513 constantPoolOop cp = instanceKlass::cast(k)->constants();
2514 switch (cp->tag_at(cp_index).value()) {
2515 case JVM_CONSTANT_Fieldref: {
2516 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2517 Symbol* classname = cp->klass_name_at(class_index);
2518 return classname->as_utf8();
2519 }
2520 default:
2521 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2522 }
2523 ShouldNotReachHere();
2524 return NULL;
2525 JVM_END
2526
2527
2528 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2529 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2530 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 constantPoolOop cp = instanceKlass::cast(k)->constants();
2533 switch (cp->tag_at(cp_index).value()) {
2534 case JVM_CONSTANT_Methodref:
2535 case JVM_CONSTANT_InterfaceMethodref: {
2536 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2537 Symbol* classname = cp->klass_name_at(class_index);
2538 return classname->as_utf8();
2539 }
2540 default:
2541 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2542 }
2543 ShouldNotReachHere();
2544 return NULL;
2545 JVM_END
2546
2547
2548 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2549 JVMWrapper("JVM_GetCPFieldModifiers");
2550 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2551 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2554 constantPoolOop cp = instanceKlass::cast(k)->constants();
2555 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2556 switch (cp->tag_at(cp_index).value()) {
2557 case JVM_CONSTANT_Fieldref: {
2558 Symbol* name = cp->uncached_name_ref_at(cp_index);
2559 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2560 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2561 if (fs.name() == name && fs.signature() == signature) {
2562 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2563 }
2564 }
2565 return -1;
2566 }
2567 default:
2568 fatal("JVM_GetCPFieldModifiers: illegal constant");
2569 }
2570 ShouldNotReachHere();
2571 return 0;
2572 JVM_END
2573
2574
2575 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2576 JVMWrapper("JVM_GetCPMethodModifiers");
2577 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2578 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2581 constantPoolOop cp = instanceKlass::cast(k)->constants();
2582 switch (cp->tag_at(cp_index).value()) {
2583 case JVM_CONSTANT_Methodref:
2584 case JVM_CONSTANT_InterfaceMethodref: {
2585 Symbol* name = cp->uncached_name_ref_at(cp_index);
2586 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2587 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2588 int methods_count = methods->length();
2589 for (int i = 0; i < methods_count; i++) {
2590 methodOop method = methodOop(methods->obj_at(i));
2591 if (method->name() == name && method->signature() == signature) {
2592 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2593 }
2594 }
2595 return -1;
2596 }
2597 default:
2598 fatal("JVM_GetCPMethodModifiers: illegal constant");
2599 }
2600 ShouldNotReachHere();
2601 return 0;
2602 JVM_END
2603
2604
2605 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2606
2607 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2608 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2609 JVM_END
2610
2611
2612 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2613 JVMWrapper("JVM_IsSameClassPackage");
2614 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2615 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2616 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2617 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2618 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2619 JVM_END
2620
2621
2622 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2623
2624 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2625 JVMWrapper2("JVM_Open (%s)", fname);
2626
2627 //%note jvm_r6
2628 int result = os::open(fname, flags, mode);
2629 if (result >= 0) {
2630 return result;
2631 } else {
2632 switch(errno) {
2633 case EEXIST:
2634 return JVM_EEXIST;
2635 default:
2636 return -1;
2637 }
2638 }
2639 JVM_END
2640
2641
2642 JVM_LEAF(jint, JVM_Close(jint fd))
2643 JVMWrapper2("JVM_Close (0x%x)", fd);
2644 //%note jvm_r6
2645 return os::close(fd);
2646 JVM_END
2647
2648
2649 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2650 JVMWrapper2("JVM_Read (0x%x)", fd);
2651
2652 //%note jvm_r6
2653 return (jint)os::restartable_read(fd, buf, nbytes);
2654 JVM_END
2655
2656
2657 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2658 JVMWrapper2("JVM_Write (0x%x)", fd);
2659
2660 //%note jvm_r6
2661 return (jint)os::write(fd, buf, nbytes);
2662 JVM_END
2663
2664
2665 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2666 JVMWrapper2("JVM_Available (0x%x)", fd);
2667 //%note jvm_r6
2668 return os::available(fd, pbytes);
2669 JVM_END
2670
2671
2672 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2673 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2674 //%note jvm_r6
2675 return os::lseek(fd, offset, whence);
2676 JVM_END
2677
2678
2679 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2680 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2681 return os::ftruncate(fd, length);
2682 JVM_END
2683
2684
2685 JVM_LEAF(jint, JVM_Sync(jint fd))
2686 JVMWrapper2("JVM_Sync (0x%x)", fd);
2687 //%note jvm_r6
2688 return os::fsync(fd);
2689 JVM_END
2690
2691
2692 // Printing support //////////////////////////////////////////////////
2693 extern "C" {
2694
2695 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2696 // see bug 4399518, 4417214
2697 if ((intptr_t)count <= 0) return -1;
2698 return vsnprintf(str, count, fmt, args);
2699 }
2700
2701
2702 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2703 va_list args;
2704 int len;
2705 va_start(args, fmt);
2706 len = jio_vsnprintf(str, count, fmt, args);
2707 va_end(args);
2708 return len;
2709 }
2710
2711
2712 int jio_fprintf(FILE* f, const char *fmt, ...) {
2713 int len;
2714 va_list args;
2715 va_start(args, fmt);
2716 len = jio_vfprintf(f, fmt, args);
2717 va_end(args);
2718 return len;
2719 }
2720
2721
2722 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2723 if (Arguments::vfprintf_hook() != NULL) {
2724 return Arguments::vfprintf_hook()(f, fmt, args);
2725 } else {
2726 return vfprintf(f, fmt, args);
2727 }
2728 }
2729
2730
2731 JNIEXPORT int jio_printf(const char *fmt, ...) {
2732 int len;
2733 va_list args;
2734 va_start(args, fmt);
2735 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2736 va_end(args);
2737 return len;
2738 }
2739
2740
2741 // HotSpot specific jio method
2742 void jio_print(const char* s) {
2743 // Try to make this function as atomic as possible.
2744 if (Arguments::vfprintf_hook() != NULL) {
2745 jio_fprintf(defaultStream::output_stream(), "%s", s);
2746 } else {
2747 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2748 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2749 }
2750 }
2751
2752 } // Extern C
2753
2754 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2755
2756 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2757 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2758 // OSThread objects. The exception to this rule is when the target object is the thread
2759 // doing the operation, in which case we know that the thread won't exit until the
2760 // operation is done (all exits being voluntary). There are a few cases where it is
2761 // rather silly to do operations on yourself, like resuming yourself or asking whether
2762 // you are alive. While these can still happen, they are not subject to deadlocks if
2763 // the lock is held while the operation occurs (this is not the case for suspend, for
2764 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2765 // implementation is local to this file, we always lock Threads_lock for that one.
2766
2767 static void thread_entry(JavaThread* thread, TRAPS) {
2768 HandleMark hm(THREAD);
2769 Handle obj(THREAD, thread->threadObj());
2770 JavaValue result(T_VOID);
2771 JavaCalls::call_virtual(&result,
2772 obj,
2773 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2774 vmSymbols::run_method_name(),
2775 vmSymbols::void_method_signature(),
2776 THREAD);
2777 }
2778
2779
2780 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2781 JVMWrapper("JVM_StartThread");
2782 JavaThread *native_thread = NULL;
2783
2784 // We cannot hold the Threads_lock when we throw an exception,
2785 // due to rank ordering issues. Example: we might need to grab the
2786 // Heap_lock while we construct the exception.
2787 bool throw_illegal_thread_state = false;
2788
2789 // We must release the Threads_lock before we can post a jvmti event
2790 // in Thread::start.
2791 {
2792 // Ensure that the C++ Thread and OSThread structures aren't freed before
2793 // we operate.
2794 MutexLocker mu(Threads_lock);
2795
2796 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2797 // re-starting an already started thread, so we should usually find
2798 // that the JavaThread is null. However for a JNI attached thread
2799 // there is a small window between the Thread object being created
2800 // (with its JavaThread set) and the update to its threadStatus, so we
2801 // have to check for this
2802 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2803 throw_illegal_thread_state = true;
2804 } else {
2805 // We could also check the stillborn flag to see if this thread was already stopped, but
2806 // for historical reasons we let the thread detect that itself when it starts running
2807
2808 jlong size =
2809 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2810 // Allocate the C++ Thread structure and create the native thread. The
2811 // stack size retrieved from java is signed, but the constructor takes
2812 // size_t (an unsigned type), so avoid passing negative values which would
2813 // result in really large stacks.
2814 size_t sz = size > 0 ? (size_t) size : 0;
2815 native_thread = new JavaThread(&thread_entry, sz);
2816
2817 // At this point it may be possible that no osthread was created for the
2818 // JavaThread due to lack of memory. Check for this situation and throw
2819 // an exception if necessary. Eventually we may want to change this so
2820 // that we only grab the lock if the thread was created successfully -
2821 // then we can also do this check and throw the exception in the
2822 // JavaThread constructor.
2823 if (native_thread->osthread() != NULL) {
2824 // Note: the current thread is not being used within "prepare".
2825 native_thread->prepare(jthread);
2826 }
2827 }
2828 }
2829
2830 if (throw_illegal_thread_state) {
2831 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2832 }
2833
2834 assert(native_thread != NULL, "Starting null thread?");
2835
2836 if (native_thread->osthread() == NULL) {
2837 // No one should hold a reference to the 'native_thread'.
2838 delete native_thread;
2839 if (JvmtiExport::should_post_resource_exhausted()) {
2840 JvmtiExport::post_resource_exhausted(
2841 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2842 "unable to create new native thread");
2843 }
2844 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2845 "unable to create new native thread");
2846 }
2847
2848 Thread::start(native_thread);
2849
2850 JVM_END
2851
2852 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2853 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2854 // but is thought to be reliable and simple. In the case, where the receiver is the
2855 // same thread as the sender, no safepoint is needed.
2856 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2857 JVMWrapper("JVM_StopThread");
2858
2859 oop java_throwable = JNIHandles::resolve(throwable);
2860 if (java_throwable == NULL) {
2861 THROW(vmSymbols::java_lang_NullPointerException());
2862 }
2863 oop java_thread = JNIHandles::resolve_non_null(jthread);
2864 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2865 Events::log_exception(JavaThread::current(),
2866 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2867 receiver, (address)java_thread, throwable);
2868 // First check if thread is alive
2869 if (receiver != NULL) {
2870 // Check if exception is getting thrown at self (use oop equality, since the
2871 // target object might exit)
2872 if (java_thread == thread->threadObj()) {
2873 THROW_OOP(java_throwable);
2874 } else {
2875 // Enques a VM_Operation to stop all threads and then deliver the exception...
2876 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2877 }
2878 }
2879 else {
2880 // Either:
2881 // - target thread has not been started before being stopped, or
2882 // - target thread already terminated
2883 // We could read the threadStatus to determine which case it is
2884 // but that is overkill as it doesn't matter. We must set the
2885 // stillborn flag for the first case, and if the thread has already
2886 // exited setting this flag has no affect
2887 java_lang_Thread::set_stillborn(java_thread);
2888 }
2889 JVM_END
2890
2891
2892 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2893 JVMWrapper("JVM_IsThreadAlive");
2894
2895 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2896 return java_lang_Thread::is_alive(thread_oop);
2897 JVM_END
2898
2899
2900 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2901 JVMWrapper("JVM_SuspendThread");
2902 oop java_thread = JNIHandles::resolve_non_null(jthread);
2903 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2904
2905 if (receiver != NULL) {
2906 // thread has run and has not exited (still on threads list)
2907
2908 {
2909 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2910 if (receiver->is_external_suspend()) {
2911 // Don't allow nested external suspend requests. We can't return
2912 // an error from this interface so just ignore the problem.
2913 return;
2914 }
2915 if (receiver->is_exiting()) { // thread is in the process of exiting
2916 return;
2917 }
2918 receiver->set_external_suspend();
2919 }
2920
2921 // java_suspend() will catch threads in the process of exiting
2922 // and will ignore them.
2923 receiver->java_suspend();
2924
2925 // It would be nice to have the following assertion in all the
2926 // time, but it is possible for a racing resume request to have
2927 // resumed this thread right after we suspended it. Temporarily
2928 // enable this assertion if you are chasing a different kind of
2929 // bug.
2930 //
2931 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2932 // receiver->is_being_ext_suspended(), "thread is not suspended");
2933 }
2934 JVM_END
2935
2936
2937 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2938 JVMWrapper("JVM_ResumeThread");
2939 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2940 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2941 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2942 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2943 // looks at it.
2944 MutexLocker ml(Threads_lock);
2945 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2946 if (thr != NULL) {
2947 // the thread has run and is not in the process of exiting
2948 thr->java_resume();
2949 }
2950 JVM_END
2951
2952
2953 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2954 JVMWrapper("JVM_SetThreadPriority");
2955 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2956 MutexLocker ml(Threads_lock);
2957 oop java_thread = JNIHandles::resolve_non_null(jthread);
2958 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2959 JavaThread* thr = java_lang_Thread::thread(java_thread);
2960 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2961 Thread::set_priority(thr, (ThreadPriority)prio);
2962 }
2963 JVM_END
2964
2965
2966 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2967 JVMWrapper("JVM_Yield");
2968 if (os::dont_yield()) return;
2969 #ifndef USDT2
2970 HS_DTRACE_PROBE0(hotspot, thread__yield);
2971 #else /* USDT2 */
2972 HOTSPOT_THREAD_YIELD();
2973 #endif /* USDT2 */
2974 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2975 // Critical for similar threading behaviour
2976 if (ConvertYieldToSleep) {
2977 os::sleep(thread, MinSleepInterval, false);
2978 } else {
2979 os::yield();
2980 }
2981 JVM_END
2982
2983
2984 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2985 JVMWrapper("JVM_Sleep");
2986
2987 if (millis < 0) {
2988 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2989 }
2990
2991 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2992 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2993 }
2994
2995 // Save current thread state and restore it at the end of this block.
2996 // And set new thread state to SLEEPING.
2997 JavaThreadSleepState jtss(thread);
2998
2999 #ifndef USDT2
3000 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3001 #else /* USDT2 */
3002 HOTSPOT_THREAD_SLEEP_BEGIN(
3003 millis);
3004 #endif /* USDT2 */
3005
3006 EventThreadSleep event;
3007
3008 if (millis == 0) {
3009 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3010 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3011 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3012 // for SOLARIS
3013 if (ConvertSleepToYield) {
3014 os::yield();
3015 } else {
3016 ThreadState old_state = thread->osthread()->get_state();
3017 thread->osthread()->set_state(SLEEPING);
3018 os::sleep(thread, MinSleepInterval, false);
3019 thread->osthread()->set_state(old_state);
3020 }
3021 } else {
3022 ThreadState old_state = thread->osthread()->get_state();
3023 thread->osthread()->set_state(SLEEPING);
3024 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3025 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3026 // us while we were sleeping. We do not overwrite those.
3027 if (!HAS_PENDING_EXCEPTION) {
3028 if (event.should_commit()) {
3029 event.set_time(millis);
3030 event.commit();
3031 }
3032 #ifndef USDT2
3033 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3034 #else /* USDT2 */
3035 HOTSPOT_THREAD_SLEEP_END(
3036 1);
3037 #endif /* USDT2 */
3038 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3039 // to properly restore the thread state. That's likely wrong.
3040 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3041 }
3042 }
3043 thread->osthread()->set_state(old_state);
3044 }
3045 if (event.should_commit()) {
3046 event.set_time(millis);
3047 event.commit();
3048 }
3049 #ifndef USDT2
3050 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3051 #else /* USDT2 */
3052 HOTSPOT_THREAD_SLEEP_END(
3053 0);
3054 #endif /* USDT2 */
3055 JVM_END
3056
3057 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3058 JVMWrapper("JVM_CurrentThread");
3059 oop jthread = thread->threadObj();
3060 assert (thread != NULL, "no current thread!");
3061 return JNIHandles::make_local(env, jthread);
3062 JVM_END
3063
3064
3065 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3066 JVMWrapper("JVM_CountStackFrames");
3067
3068 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3069 oop java_thread = JNIHandles::resolve_non_null(jthread);
3070 bool throw_illegal_thread_state = false;
3071 int count = 0;
3072
3073 {
3074 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3075 // We need to re-resolve the java_thread, since a GC might have happened during the
3076 // acquire of the lock
3077 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3078
3079 if (thr == NULL) {
3080 // do nothing
3081 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3082 // Check whether this java thread has been suspended already. If not, throws
3083 // IllegalThreadStateException. We defer to throw that exception until
3084 // Threads_lock is released since loading exception class has to leave VM.
3085 // The correct way to test a thread is actually suspended is
3086 // wait_for_ext_suspend_completion(), but we can't call that while holding
3087 // the Threads_lock. The above tests are sufficient for our purposes
3088 // provided the walkability of the stack is stable - which it isn't
3089 // 100% but close enough for most practical purposes.
3090 throw_illegal_thread_state = true;
3091 } else {
3092 // Count all java activation, i.e., number of vframes
3093 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3094 // Native frames are not counted
3095 if (!vfst.method()->is_native()) count++;
3096 }
3097 }
3098 }
3099
3100 if (throw_illegal_thread_state) {
3101 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3102 "this thread is not suspended");
3103 }
3104 return count;
3105 JVM_END
3106
3107 // Consider: A better way to implement JVM_Interrupt() is to acquire
3108 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3109 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3110 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3111 // outside the critical section. Threads_lock is hot so we want to minimize
3112 // the hold-time. A cleaner interface would be to decompose interrupt into
3113 // two steps. The 1st phase, performed under Threads_lock, would return
3114 // a closure that'd be invoked after Threads_lock was dropped.
3115 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3116 // admit spurious wakeups.
3117
3118 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3119 JVMWrapper("JVM_Interrupt");
3120
3121 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3122 oop java_thread = JNIHandles::resolve_non_null(jthread);
3123 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3124 // We need to re-resolve the java_thread, since a GC might have happened during the
3125 // acquire of the lock
3126 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3127 if (thr != NULL) {
3128 Thread::interrupt(thr);
3129 }
3130 JVM_END
3131
3132
3133 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3134 JVMWrapper("JVM_IsInterrupted");
3135
3136 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3137 oop java_thread = JNIHandles::resolve_non_null(jthread);
3138 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3139 // We need to re-resolve the java_thread, since a GC might have happened during the
3140 // acquire of the lock
3141 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3142 if (thr == NULL) {
3143 return JNI_FALSE;
3144 } else {
3145 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3146 }
3147 JVM_END
3148
3149
3150 // Return true iff the current thread has locked the object passed in
3151
3152 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3153 JVMWrapper("JVM_HoldsLock");
3154 assert(THREAD->is_Java_thread(), "sanity check");
3155 if (obj == NULL) {
3156 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3157 }
3158 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3159 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3160 JVM_END
3161
3162
3163 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3164 JVMWrapper("JVM_DumpAllStacks");
3165 VM_PrintThreads op;
3166 VMThread::execute(&op);
3167 if (JvmtiExport::should_post_data_dump()) {
3168 JvmtiExport::post_data_dump();
3169 }
3170 JVM_END
3171
3172 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3173 JVMWrapper("JVM_SetNativeThreadName");
3174 ResourceMark rm(THREAD);
3175 oop java_thread = JNIHandles::resolve_non_null(jthread);
3176 JavaThread* thr = java_lang_Thread::thread(java_thread);
3177 // Thread naming only supported for the current thread, doesn't work for
3178 // target threads.
3179 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3180 // we don't set the name of an attached thread to avoid stepping
3181 // on other programs
3182 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3183 os::set_native_thread_name(thread_name);
3184 }
3185 JVM_END
3186
3187 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3188
3189 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3190 assert(jthread->is_Java_thread(), "must be a Java thread");
3191 if (jthread->privileged_stack_top() == NULL) return false;
3192 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3193 oop loader = jthread->privileged_stack_top()->class_loader();
3194 if (loader == NULL) return true;
3195 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3196 if (trusted) return true;
3197 }
3198 return false;
3199 }
3200
3201 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3202 JVMWrapper("JVM_CurrentLoadedClass");
3203 ResourceMark rm(THREAD);
3204
3205 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3206 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3207 bool trusted = is_trusted_frame(thread, &vfst);
3208 if (trusted) return NULL;
3209
3210 methodOop m = vfst.method();
3211 if (!m->is_native()) {
3212 klassOop holder = m->method_holder();
3213 oop loader = instanceKlass::cast(holder)->class_loader();
3214 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3215 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
3216 }
3217 }
3218 }
3219 return NULL;
3220 JVM_END
3221
3222
3223 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3224 JVMWrapper("JVM_CurrentClassLoader");
3225 ResourceMark rm(THREAD);
3226
3227 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3228
3229 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3230 bool trusted = is_trusted_frame(thread, &vfst);
3231 if (trusted) return NULL;
3232
3233 methodOop m = vfst.method();
3234 if (!m->is_native()) {
3235 klassOop holder = m->method_holder();
3236 assert(holder->is_klass(), "just checking");
3237 oop loader = instanceKlass::cast(holder)->class_loader();
3238 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3239 return JNIHandles::make_local(env, loader);
3240 }
3241 }
3242 }
3243 return NULL;
3244 JVM_END
3245
3246
3247 // Utility object for collecting method holders walking down the stack
3248 class KlassLink: public ResourceObj {
3249 public:
3250 KlassHandle klass;
3251 KlassLink* next;
3252
3253 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3254 };
3255
3256
3257 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3258 JVMWrapper("JVM_GetClassContext");
3259 ResourceMark rm(THREAD);
3260 JvmtiVMObjectAllocEventCollector oam;
3261 // Collect linked list of (handles to) method holders
3262 KlassLink* first = NULL;
3263 KlassLink* last = NULL;
3264 int depth = 0;
3265
3266 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
3267 // Native frames are not returned
3268 if (!vfst.method()->is_native()) {
3269 klassOop holder = vfst.method()->method_holder();
3270 assert(holder->is_klass(), "just checking");
3271 depth++;
3272 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3273 if (first == NULL) {
3274 first = last = l;
3275 } else {
3276 last->next = l;
3277 last = l;
3278 }
3279 }
3280 }
3281
3282 // Create result array of type [Ljava/lang/Class;
3283 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3284 // Fill in mirrors corresponding to method holders
3285 int index = 0;
3286 while (first != NULL) {
3287 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
3288 first = first->next;
3289 }
3290 assert(index == depth, "just checking");
3291
3292 return (jobjectArray) JNIHandles::make_local(env, result);
3293 JVM_END
3294
3295
3296 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3297 JVMWrapper("JVM_ClassDepth");
3298 ResourceMark rm(THREAD);
3299 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3300 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3301
3302 const char* str = java_lang_String::as_utf8_string(class_name_str());
3303 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3304 if (class_name_sym == NULL) {
3305 return -1;
3306 }
3307
3308 int depth = 0;
3309
3310 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3311 if (!vfst.method()->is_native()) {
3312 klassOop holder = vfst.method()->method_holder();
3313 assert(holder->is_klass(), "just checking");
3314 if (instanceKlass::cast(holder)->name() == class_name_sym) {
3315 return depth;
3316 }
3317 depth++;
3318 }
3319 }
3320 return -1;
3321 JVM_END
3322
3323
3324 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3325 JVMWrapper("JVM_ClassLoaderDepth");
3326 ResourceMark rm(THREAD);
3327 int depth = 0;
3328 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3329 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3330 bool trusted = is_trusted_frame(thread, &vfst);
3331 if (trusted) return -1;
3332
3333 methodOop m = vfst.method();
3334 if (!m->is_native()) {
3335 klassOop holder = m->method_holder();
3336 assert(holder->is_klass(), "just checking");
3337 oop loader = instanceKlass::cast(holder)->class_loader();
3338 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3339 return depth;
3340 }
3341 depth++;
3342 }
3343 }
3344 return -1;
3345 JVM_END
3346
3347
3348 // java.lang.Package ////////////////////////////////////////////////////////////////
3349
3350
3351 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3352 JVMWrapper("JVM_GetSystemPackage");
3353 ResourceMark rm(THREAD);
3354 JvmtiVMObjectAllocEventCollector oam;
3355 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3356 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3357 return (jstring) JNIHandles::make_local(result);
3358 JVM_END
3359
3360
3361 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3362 JVMWrapper("JVM_GetSystemPackages");
3363 JvmtiVMObjectAllocEventCollector oam;
3364 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3365 return (jobjectArray) JNIHandles::make_local(result);
3366 JVM_END
3367
3368
3369 // ObjectInputStream ///////////////////////////////////////////////////////////////
3370
3371 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3372 if (current_class == NULL) {
3373 return true;
3374 }
3375 if ((current_class == field_class) || access.is_public()) {
3376 return true;
3377 }
3378
3379 if (access.is_protected()) {
3380 // See if current_class is a subclass of field_class
3381 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3382 return true;
3383 }
3384 }
3385
3386 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3387 }
3388
3389
3390 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3391 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3392 JVMWrapper("JVM_AllocateNewObject");
3393 JvmtiVMObjectAllocEventCollector oam;
3394 // Receiver is not used
3395 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3396 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3397
3398 // Cannot instantiate primitive types
3399 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3400 ResourceMark rm(THREAD);
3401 THROW_0(vmSymbols::java_lang_InvalidClassException());
3402 }
3403
3404 // Arrays not allowed here, must use JVM_AllocateNewArray
3405 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3406 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3407 ResourceMark rm(THREAD);
3408 THROW_0(vmSymbols::java_lang_InvalidClassException());
3409 }
3410
3411 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3412 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3413
3414 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3415
3416 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3417 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3418
3419 // Make sure klass is initialized, since we are about to instantiate one of them.
3420 curr_klass->initialize(CHECK_NULL);
3421
3422 methodHandle m (THREAD,
3423 init_klass->find_method(vmSymbols::object_initializer_name(),
3424 vmSymbols::void_method_signature()));
3425 if (m.is_null()) {
3426 ResourceMark rm(THREAD);
3427 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3428 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3429 vmSymbols::object_initializer_name(),
3430 vmSymbols::void_method_signature()));
3431 }
3432
3433 if (curr_klass == init_klass && !m->is_public()) {
3434 // Calling the constructor for class 'curr_klass'.
3435 // Only allow calls to a public no-arg constructor.
3436 // This path corresponds to creating an Externalizable object.
3437 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3438 }
3439
3440 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3441 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3442 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3443 }
3444
3445 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3446 // Call constructor m. This might call a constructor higher up in the hierachy
3447 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3448
3449 return JNIHandles::make_local(obj());
3450 JVM_END
3451
3452
3453 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3454 JVMWrapper("JVM_AllocateNewArray");
3455 JvmtiVMObjectAllocEventCollector oam;
3456 oop mirror = JNIHandles::resolve_non_null(currClass);
3457
3458 if (java_lang_Class::is_primitive(mirror)) {
3459 THROW_0(vmSymbols::java_lang_InvalidClassException());
3460 }
3461 klassOop k = java_lang_Class::as_klassOop(mirror);
3462 oop result;
3463
3464 if (k->klass_part()->oop_is_typeArray()) {
3465 // typeArray
3466 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3467 } else if (k->klass_part()->oop_is_objArray()) {
3468 // objArray
3469 objArrayKlassHandle oak(THREAD, k);
3470 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3471 result = oak->allocate(length, CHECK_NULL);
3472 } else {
3473 THROW_0(vmSymbols::java_lang_InvalidClassException());
3474 }
3475 return JNIHandles::make_local(env, result);
3476 JVM_END
3477
3478
3479 // Return the first non-null class loader up the execution stack, or null
3480 // if only code from the null class loader is on the stack.
3481
3482 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3483 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3484 // UseNewReflection
3485 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3486 klassOop holder = vfst.method()->method_holder();
3487 oop loader = instanceKlass::cast(holder)->class_loader();
3488 if (loader != NULL) {
3489 return JNIHandles::make_local(env, loader);
3490 }
3491 }
3492 return NULL;
3493 JVM_END
3494
3495
3496 // Load a class relative to the most recent class on the stack with a non-null
3497 // classloader.
3498 // This function has been deprecated and should not be considered part of the
3499 // specified JVM interface.
3500
3501 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3502 jclass currClass, jstring currClassName))
3503 JVMWrapper("JVM_LoadClass0");
3504 // Receiver is not used
3505 ResourceMark rm(THREAD);
3506
3507 // Class name argument is not guaranteed to be in internal format
3508 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3509 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3510
3511 const char* str = java_lang_String::as_utf8_string(string());
3512
3513 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3514 // It's impossible to create this class; the name cannot fit
3515 // into the constant pool.
3516 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3517 }
3518
3519 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3520 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3521 // Find the most recent class on the stack with a non-null classloader
3522 oop loader = NULL;
3523 oop protection_domain = NULL;
3524 if (curr_klass.is_null()) {
3525 for (vframeStream vfst(thread);
3526 !vfst.at_end() && loader == NULL;
3527 vfst.next()) {
3528 if (!vfst.method()->is_native()) {
3529 klassOop holder = vfst.method()->method_holder();
3530 loader = instanceKlass::cast(holder)->class_loader();
3531 protection_domain = instanceKlass::cast(holder)->protection_domain();
3532 }
3533 }
3534 } else {
3535 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3536 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3537 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3538 }
3539 Handle h_loader(THREAD, loader);
3540 Handle h_prot (THREAD, protection_domain);
3541 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3542 false, thread);
3543 if (TraceClassResolution && result != NULL) {
3544 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
3545 }
3546 return result;
3547 JVM_END
3548
3549
3550 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3551
3552
3553 // resolve array handle and check arguments
3554 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3555 if (arr == NULL) {
3556 THROW_0(vmSymbols::java_lang_NullPointerException());
3557 }
3558 oop a = JNIHandles::resolve_non_null(arr);
3559 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3560 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3561 }
3562 return arrayOop(a);
3563 }
3564
3565
3566 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3567 JVMWrapper("JVM_GetArrayLength");
3568 arrayOop a = check_array(env, arr, false, CHECK_0);
3569 return a->length();
3570 JVM_END
3571
3572
3573 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3574 JVMWrapper("JVM_Array_Get");
3575 JvmtiVMObjectAllocEventCollector oam;
3576 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3577 jvalue value;
3578 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3579 oop box = Reflection::box(&value, type, CHECK_NULL);
3580 return JNIHandles::make_local(env, box);
3581 JVM_END
3582
3583
3584 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3585 JVMWrapper("JVM_GetPrimitiveArrayElement");
3586 jvalue value;
3587 value.i = 0; // to initialize value before getting used in CHECK
3588 arrayOop a = check_array(env, arr, true, CHECK_(value));
3589 assert(a->is_typeArray(), "just checking");
3590 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3591 BasicType wide_type = (BasicType) wCode;
3592 if (type != wide_type) {
3593 Reflection::widen(&value, type, wide_type, CHECK_(value));
3594 }
3595 return value;
3596 JVM_END
3597
3598
3599 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3600 JVMWrapper("JVM_SetArrayElement");
3601 arrayOop a = check_array(env, arr, false, CHECK);
3602 oop box = JNIHandles::resolve(val);
3603 jvalue value;
3604 value.i = 0; // to initialize value before getting used in CHECK
3605 BasicType value_type;
3606 if (a->is_objArray()) {
3607 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3608 value_type = Reflection::unbox_for_regular_object(box, &value);
3609 } else {
3610 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3611 }
3612 Reflection::array_set(&value, a, index, value_type, CHECK);
3613 JVM_END
3614
3615
3616 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3617 JVMWrapper("JVM_SetPrimitiveArrayElement");
3618 arrayOop a = check_array(env, arr, true, CHECK);
3619 assert(a->is_typeArray(), "just checking");
3620 BasicType value_type = (BasicType) vCode;
3621 Reflection::array_set(&v, a, index, value_type, CHECK);
3622 JVM_END
3623
3624
3625 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3626 JVMWrapper("JVM_NewArray");
3627 JvmtiVMObjectAllocEventCollector oam;
3628 oop element_mirror = JNIHandles::resolve(eltClass);
3629 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3630 return JNIHandles::make_local(env, result);
3631 JVM_END
3632
3633
3634 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3635 JVMWrapper("JVM_NewMultiArray");
3636 JvmtiVMObjectAllocEventCollector oam;
3637 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3638 oop element_mirror = JNIHandles::resolve(eltClass);
3639 assert(dim_array->is_typeArray(), "just checking");
3640 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3641 return JNIHandles::make_local(env, result);
3642 JVM_END
3643
3644
3645 // Networking library support ////////////////////////////////////////////////////////////////////
3646
3647 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3648 JVMWrapper("JVM_InitializeSocketLibrary");
3649 return 0;
3650 JVM_END
3651
3652
3653 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3654 JVMWrapper("JVM_Socket");
3655 return os::socket(domain, type, protocol);
3656 JVM_END
3657
3658
3659 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3660 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3661 //%note jvm_r6
3662 return os::socket_close(fd);
3663 JVM_END
3664
3665
3666 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3667 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3668 //%note jvm_r6
3669 return os::socket_shutdown(fd, howto);
3670 JVM_END
3671
3672
3673 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3674 JVMWrapper2("JVM_Recv (0x%x)", fd);
3675 //%note jvm_r6
3676 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3677 JVM_END
3678
3679
3680 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3681 JVMWrapper2("JVM_Send (0x%x)", fd);
3682 //%note jvm_r6
3683 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3684 JVM_END
3685
3686
3687 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3688 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3689 //%note jvm_r6
3690 return os::timeout(fd, timeout);
3691 JVM_END
3692
3693
3694 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3695 JVMWrapper2("JVM_Listen (0x%x)", fd);
3696 //%note jvm_r6
3697 return os::listen(fd, count);
3698 JVM_END
3699
3700
3701 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3702 JVMWrapper2("JVM_Connect (0x%x)", fd);
3703 //%note jvm_r6
3704 return os::connect(fd, him, (socklen_t)len);
3705 JVM_END
3706
3707
3708 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3709 JVMWrapper2("JVM_Bind (0x%x)", fd);
3710 //%note jvm_r6
3711 return os::bind(fd, him, (socklen_t)len);
3712 JVM_END
3713
3714
3715 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3716 JVMWrapper2("JVM_Accept (0x%x)", fd);
3717 //%note jvm_r6
3718 socklen_t socklen = (socklen_t)(*len);
3719 jint result = os::accept(fd, him, &socklen);
3720 *len = (jint)socklen;
3721 return result;
3722 JVM_END
3723
3724
3725 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3726 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3727 //%note jvm_r6
3728 socklen_t socklen = (socklen_t)(*fromlen);
3729 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3730 *fromlen = (int)socklen;
3731 return result;
3732 JVM_END
3733
3734
3735 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3736 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3737 //%note jvm_r6
3738 socklen_t socklen = (socklen_t)(*len);
3739 jint result = os::get_sock_name(fd, him, &socklen);
3740 *len = (int)socklen;
3741 return result;
3742 JVM_END
3743
3744
3745 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3746 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3747 //%note jvm_r6
3748 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3749 JVM_END
3750
3751
3752 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3753 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3754 //%note jvm_r6
3755 return os::socket_available(fd, pbytes);
3756 JVM_END
3757
3758
3759 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3760 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3761 //%note jvm_r6
3762 socklen_t socklen = (socklen_t)(*optlen);
3763 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3764 *optlen = (int)socklen;
3765 return result;
3766 JVM_END
3767
3768
3769 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3770 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3771 //%note jvm_r6
3772 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3773 JVM_END
3774
3775
3776 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3777 JVMWrapper("JVM_GetHostName");
3778 return os::get_host_name(name, namelen);
3779 JVM_END
3780
3781
3782 // Library support ///////////////////////////////////////////////////////////////////////////
3783
3784 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3785 //%note jvm_ct
3786 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3787 char ebuf[1024];
3788 void *load_result;
3789 {
3790 ThreadToNativeFromVM ttnfvm(thread);
3791 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3792 }
3793 if (load_result == NULL) {
3794 char msg[1024];
3795 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3796 // Since 'ebuf' may contain a string encoded using
3797 // platform encoding scheme, we need to pass
3798 // Exceptions::unsafe_to_utf8 to the new_exception method
3799 // as the last argument. See bug 6367357.
3800 Handle h_exception =
3801 Exceptions::new_exception(thread,
3802 vmSymbols::java_lang_UnsatisfiedLinkError(),
3803 msg, Exceptions::unsafe_to_utf8);
3804
3805 THROW_HANDLE_0(h_exception);
3806 }
3807 return load_result;
3808 JVM_END
3809
3810
3811 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3812 JVMWrapper("JVM_UnloadLibrary");
3813 os::dll_unload(handle);
3814 JVM_END
3815
3816
3817 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3818 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3819 return os::dll_lookup(handle, name);
3820 JVM_END
3821
3822
3823 // Floating point support ////////////////////////////////////////////////////////////////////
3824
3825 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3826 JVMWrapper("JVM_IsNaN");
3827 return g_isnan(a);
3828 JVM_END
3829
3830
3831 // JNI version ///////////////////////////////////////////////////////////////////////////////
3832
3833 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3834 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3835 return Threads::is_supported_jni_version_including_1_1(version);
3836 JVM_END
3837
3838
3839 // String support ///////////////////////////////////////////////////////////////////////////
3840
3841 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3842 JVMWrapper("JVM_InternString");
3843 JvmtiVMObjectAllocEventCollector oam;
3844 if (str == NULL) return NULL;
3845 oop string = JNIHandles::resolve_non_null(str);
3846 oop result = StringTable::intern(string, CHECK_NULL);
3847 return (jstring) JNIHandles::make_local(env, result);
3848 JVM_END
3849
3850
3851 // Raw monitor support //////////////////////////////////////////////////////////////////////
3852
3853 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3854 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3855 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3856 // that only works with java threads.
3857
3858
3859 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3860 VM_Exit::block_if_vm_exited();
3861 JVMWrapper("JVM_RawMonitorCreate");
3862 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3863 }
3864
3865
3866 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3867 VM_Exit::block_if_vm_exited();
3868 JVMWrapper("JVM_RawMonitorDestroy");
3869 delete ((Mutex*) mon);
3870 }
3871
3872
3873 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3874 VM_Exit::block_if_vm_exited();
3875 JVMWrapper("JVM_RawMonitorEnter");
3876 ((Mutex*) mon)->jvm_raw_lock();
3877 return 0;
3878 }
3879
3880
3881 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3882 VM_Exit::block_if_vm_exited();
3883 JVMWrapper("JVM_RawMonitorExit");
3884 ((Mutex*) mon)->jvm_raw_unlock();
3885 }
3886
3887
3888 // Support for Serialization
3889
3890 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3891 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3892 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3893 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3894
3895 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3896 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3897 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3898 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3899
3900
3901 void initialize_converter_functions() {
3902 if (JDK_Version::is_gte_jdk14x_version()) {
3903 // These functions only exist for compatibility with 1.3.1 and earlier
3904 return;
3905 }
3906
3907 // called from universe_post_init()
3908 assert(
3909 int_bits_to_float_fn == NULL &&
3910 long_bits_to_double_fn == NULL &&
3911 float_to_int_bits_fn == NULL &&
3912 double_to_long_bits_fn == NULL ,
3913 "initialization done twice"
3914 );
3915 // initialize
3916 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3917 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3918 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3919 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3920 // verify
3921 assert(
3922 int_bits_to_float_fn != NULL &&
3923 long_bits_to_double_fn != NULL &&
3924 float_to_int_bits_fn != NULL &&
3925 double_to_long_bits_fn != NULL ,
3926 "initialization failed"
3927 );
3928 }
3929
3930
3931 // Serialization
3932 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3933 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3934 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3935
3936 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3937 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3938 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3939 oop o = JNIHandles::resolve(obj);
3940
3941 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3942 THROW(vmSymbols::java_lang_NullPointerException());
3943 }
3944
3945 jsize nfids = fids->length();
3946 if (nfids == 0) return;
3947
3948 if (tcodes->length() < nfids) {
3949 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3950 }
3951
3952 jsize off = 0;
3953 /* loop through fields, setting values */
3954 for (jsize i = 0; i < nfids; i++) {
3955 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3956 int field_offset;
3957 if (fid != NULL) {
3958 // NULL is a legal value for fid, but retrieving the field offset
3959 // trigger assertion in that case
3960 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3961 }
3962
3963 switch (tcodes->char_at(i)) {
3964 case 'Z':
3965 if (fid != NULL) {
3966 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3967 o->bool_field_put(field_offset, val);
3968 }
3969 off++;
3970 break;
3971
3972 case 'B':
3973 if (fid != NULL) {
3974 o->byte_field_put(field_offset, dbuf->byte_at(off));
3975 }
3976 off++;
3977 break;
3978
3979 case 'C':
3980 if (fid != NULL) {
3981 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3982 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3983 o->char_field_put(field_offset, val);
3984 }
3985 off += 2;
3986 break;
3987
3988 case 'S':
3989 if (fid != NULL) {
3990 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3991 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3992 o->short_field_put(field_offset, val);
3993 }
3994 off += 2;
3995 break;
3996
3997 case 'I':
3998 if (fid != NULL) {
3999 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4000 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4001 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4002 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4003 o->int_field_put(field_offset, ival);
4004 }
4005 off += 4;
4006 break;
4007
4008 case 'F':
4009 if (fid != NULL) {
4010 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4011 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4012 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4013 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4014 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4015 o->float_field_put(field_offset, fval);
4016 }
4017 off += 4;
4018 break;
4019
4020 case 'J':
4021 if (fid != NULL) {
4022 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4023 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4024 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4025 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4026 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4027 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4028 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4029 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4030 o->long_field_put(field_offset, lval);
4031 }
4032 off += 8;
4033 break;
4034
4035 case 'D':
4036 if (fid != NULL) {
4037 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4038 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4039 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4040 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4041 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4042 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4043 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4044 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4045 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4046 o->double_field_put(field_offset, dval);
4047 }
4048 off += 8;
4049 break;
4050
4051 default:
4052 // Illegal typecode
4053 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4054 }
4055 }
4056 JVM_END
4057
4058
4059 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4060 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4061 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4062
4063 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4064 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4065 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4066 oop o = JNIHandles::resolve(obj);
4067
4068 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4069 THROW(vmSymbols::java_lang_NullPointerException());
4070 }
4071
4072 jsize nfids = fids->length();
4073 if (nfids == 0) return;
4074
4075 if (tcodes->length() < nfids) {
4076 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4077 }
4078
4079 /* loop through fields, fetching values */
4080 jsize off = 0;
4081 for (jsize i = 0; i < nfids; i++) {
4082 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4083 if (fid == NULL) {
4084 THROW(vmSymbols::java_lang_NullPointerException());
4085 }
4086 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4087
4088 switch (tcodes->char_at(i)) {
4089 case 'Z':
4090 {
4091 jboolean val = o->bool_field(field_offset);
4092 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4093 }
4094 break;
4095
4096 case 'B':
4097 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4098 break;
4099
4100 case 'C':
4101 {
4102 jchar val = o->char_field(field_offset);
4103 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4104 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4105 }
4106 break;
4107
4108 case 'S':
4109 {
4110 jshort val = o->short_field(field_offset);
4111 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4112 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4113 }
4114 break;
4115
4116 case 'I':
4117 {
4118 jint val = o->int_field(field_offset);
4119 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4120 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4121 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4122 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4123 }
4124 break;
4125
4126 case 'F':
4127 {
4128 jfloat fval = o->float_field(field_offset);
4129 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4130 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4131 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4132 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4133 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4134 }
4135 break;
4136
4137 case 'J':
4138 {
4139 jlong val = o->long_field(field_offset);
4140 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4141 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4142 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4143 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4144 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4145 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4146 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4147 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4148 }
4149 break;
4150
4151 case 'D':
4152 {
4153 jdouble dval = o->double_field(field_offset);
4154 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4155 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4156 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4157 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4158 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4159 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4160 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4161 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4162 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4163 }
4164 break;
4165
4166 default:
4167 // Illegal typecode
4168 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4169 }
4170 }
4171 JVM_END
4172
4173
4174 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4175
4176 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4177 Handle loader, Handle protection_domain,
4178 jboolean throwError, TRAPS) {
4179 // Security Note:
4180 // The Java level wrapper will perform the necessary security check allowing
4181 // us to pass the NULL as the initiating class loader. The VM is responsible for
4182 // the checkPackageAccess relative to the initiating class loader via the
4183 // protection_domain. The protection_domain is passed as NULL by the java code
4184 // if there is no security manager in 3-arg Class.forName().
4185 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4186
4187 KlassHandle klass_handle(THREAD, klass);
4188 // Check if we should initialize the class
4189 if (init && klass_handle->oop_is_instance()) {
4190 klass_handle->initialize(CHECK_NULL);
4191 }
4192 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4193 }
4194
4195
4196 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4197
4198 #ifndef PRODUCT
4199
4200 extern "C" {
4201 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4202 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4203 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4204 }
4205
4206 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4207 JVMWrapper("JVM_AccessBoolVMFlag");
4208 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4209 JVM_END
4210
4211 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4212 JVMWrapper("JVM_AccessVMIntFlag");
4213 intx v;
4214 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4215 *value = (jint)v;
4216 return result;
4217 JVM_END
4218
4219
4220 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4221 JVMWrapper("JVM_VMBreakPoint");
4222 oop the_obj = JNIHandles::resolve(obj);
4223 BREAKPOINT;
4224 JVM_END
4225
4226
4227 #endif
4228
4229
4230 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4231
4232 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4233 JVMWrapper("JVM_InvokeMethod");
4234 Handle method_handle;
4235 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4236 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4237 Handle receiver(THREAD, JNIHandles::resolve(obj));
4238 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4239 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4240 jobject res = JNIHandles::make_local(env, result);
4241 if (JvmtiExport::should_post_vm_object_alloc()) {
4242 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4243 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4244 if (java_lang_Class::is_primitive(ret_type)) {
4245 // Only for primitive type vm allocates memory for java object.
4246 // See box() method.
4247 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4248 }
4249 }
4250 return res;
4251 } else {
4252 THROW_0(vmSymbols::java_lang_StackOverflowError());
4253 }
4254 JVM_END
4255
4256
4257 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4258 JVMWrapper("JVM_NewInstanceFromConstructor");
4259 oop constructor_mirror = JNIHandles::resolve(c);
4260 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4261 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4262 jobject res = JNIHandles::make_local(env, result);
4263 if (JvmtiExport::should_post_vm_object_alloc()) {
4264 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4265 }
4266 return res;
4267 JVM_END
4268
4269 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4270
4271 JVM_LEAF(jboolean, JVM_SupportsCX8())
4272 JVMWrapper("JVM_SupportsCX8");
4273 return VM_Version::supports_cx8();
4274 JVM_END
4275
4276
4277 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4278 JVMWrapper("JVM_CX8Field");
4279 jlong res;
4280 oop o = JNIHandles::resolve(obj);
4281 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4282 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4283
4284 assert(VM_Version::supports_cx8(), "cx8 not supported");
4285 res = Atomic::cmpxchg(newVal, addr, oldVal);
4286
4287 return res == oldVal;
4288 JVM_END
4289
4290 // DTrace ///////////////////////////////////////////////////////////////////
4291
4292 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4293 JVMWrapper("JVM_DTraceGetVersion");
4294 return (jint)JVM_TRACING_DTRACE_VERSION;
4295 JVM_END
4296
4297 JVM_ENTRY(jlong,JVM_DTraceActivate(
4298 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4299 JVM_DTraceProvider* providers))
4300 JVMWrapper("JVM_DTraceActivate");
4301 return DTraceJSDT::activate(
4302 version, module_name, providers_count, providers, CHECK_0);
4303 JVM_END
4304
4305 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4306 JVMWrapper("JVM_DTraceIsProbeEnabled");
4307 return DTraceJSDT::is_probe_enabled(method);
4308 JVM_END
4309
4310 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4311 JVMWrapper("JVM_DTraceDispose");
4312 DTraceJSDT::dispose(handle);
4313 JVM_END
4314
4315 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4316 JVMWrapper("JVM_DTraceIsSupported");
4317 return DTraceJSDT::is_supported();
4318 JVM_END
4319
4320 // Returns an array of all live Thread objects (VM internal JavaThreads,
4321 // jvmti agent threads, and JNI attaching threads are skipped)
4322 // See CR 6404306 regarding JNI attaching threads
4323 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4324 ResourceMark rm(THREAD);
4325 ThreadsListEnumerator tle(THREAD, false, false);
4326 JvmtiVMObjectAllocEventCollector oam;
4327
4328 int num_threads = tle.num_threads();
4329 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4330 objArrayHandle threads_ah(THREAD, r);
4331
4332 for (int i = 0; i < num_threads; i++) {
4333 Handle h = tle.get_threadObj(i);
4334 threads_ah->obj_at_put(i, h());
4335 }
4336
4337 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4338 JVM_END
4339
4340
4341 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4342 // Return StackTraceElement[][], each element is the stack trace of a thread in
4343 // the corresponding entry in the given threads array
4344 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4345 JVMWrapper("JVM_DumpThreads");
4346 JvmtiVMObjectAllocEventCollector oam;
4347
4348 // Check if threads is null
4349 if (threads == NULL) {
4350 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4351 }
4352
4353 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4354 objArrayHandle ah(THREAD, a);
4355 int num_threads = ah->length();
4356 // check if threads is non-empty array
4357 if (num_threads == 0) {
4358 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4359 }
4360
4361 // check if threads is not an array of objects of Thread class
4362 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4363 if (k != SystemDictionary::Thread_klass()) {
4364 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4365 }
4366
4367 ResourceMark rm(THREAD);
4368
4369 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4370 for (int i = 0; i < num_threads; i++) {
4371 oop thread_obj = ah->obj_at(i);
4372 instanceHandle h(THREAD, (instanceOop) thread_obj);
4373 thread_handle_array->append(h);
4374 }
4375
4376 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4377 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4378
4379 JVM_END
4380
4381 // JVM monitoring and management support
4382 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4383 return Management::get_jmm_interface(version);
4384 JVM_END
4385
4386 // com.sun.tools.attach.VirtualMachine agent properties support
4387 //
4388 // Initialize the agent properties with the properties maintained in the VM
4389 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4390 JVMWrapper("JVM_InitAgentProperties");
4391 ResourceMark rm;
4392
4393 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4394
4395 PUTPROP(props, "sun.java.command", Arguments::java_command());
4396 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4397 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4398 return properties;
4399 JVM_END
4400
4401 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4402 {
4403 JVMWrapper("JVM_GetEnclosingMethodInfo");
4404 JvmtiVMObjectAllocEventCollector oam;
4405
4406 if (ofClass == NULL) {
4407 return NULL;
4408 }
4409 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4410 // Special handling for primitive objects
4411 if (java_lang_Class::is_primitive(mirror())) {
4412 return NULL;
4413 }
4414 klassOop k = java_lang_Class::as_klassOop(mirror());
4415 if (!Klass::cast(k)->oop_is_instance()) {
4416 return NULL;
4417 }
4418 instanceKlassHandle ik_h(THREAD, k);
4419 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4420 if (encl_method_class_idx == 0) {
4421 return NULL;
4422 }
4423 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4424 objArrayHandle dest(THREAD, dest_o);
4425 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4426 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4427 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4428 if (encl_method_method_idx != 0) {
4429 Symbol* sym = ik_h->constants()->symbol_at(
4430 extract_low_short_from_int(
4431 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4432 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4433 dest->obj_at_put(1, str());
4434 sym = ik_h->constants()->symbol_at(
4435 extract_high_short_from_int(
4436 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4437 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4438 dest->obj_at_put(2, str());
4439 }
4440 return (jobjectArray) JNIHandles::make_local(dest());
4441 }
4442 JVM_END
4443
4444 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4445 jint javaThreadState))
4446 {
4447 // If new thread states are added in future JDK and VM versions,
4448 // this should check if the JDK version is compatible with thread
4449 // states supported by the VM. Return NULL if not compatible.
4450 //
4451 // This function must map the VM java_lang_Thread::ThreadStatus
4452 // to the Java thread state that the JDK supports.
4453 //
4454
4455 typeArrayHandle values_h;
4456 switch (javaThreadState) {
4457 case JAVA_THREAD_STATE_NEW : {
4458 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4459 values_h = typeArrayHandle(THREAD, r);
4460 values_h->int_at_put(0, java_lang_Thread::NEW);
4461 break;
4462 }
4463 case JAVA_THREAD_STATE_RUNNABLE : {
4464 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4465 values_h = typeArrayHandle(THREAD, r);
4466 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4467 break;
4468 }
4469 case JAVA_THREAD_STATE_BLOCKED : {
4470 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4471 values_h = typeArrayHandle(THREAD, r);
4472 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4473 break;
4474 }
4475 case JAVA_THREAD_STATE_WAITING : {
4476 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4477 values_h = typeArrayHandle(THREAD, r);
4478 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4479 values_h->int_at_put(1, java_lang_Thread::PARKED);
4480 break;
4481 }
4482 case JAVA_THREAD_STATE_TIMED_WAITING : {
4483 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4484 values_h = typeArrayHandle(THREAD, r);
4485 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4486 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4487 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4488 break;
4489 }
4490 case JAVA_THREAD_STATE_TERMINATED : {
4491 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4492 values_h = typeArrayHandle(THREAD, r);
4493 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4494 break;
4495 }
4496 default:
4497 // Unknown state - probably incompatible JDK version
4498 return NULL;
4499 }
4500
4501 return (jintArray) JNIHandles::make_local(env, values_h());
4502 }
4503 JVM_END
4504
4505
4506 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4507 jint javaThreadState,
4508 jintArray values))
4509 {
4510 // If new thread states are added in future JDK and VM versions,
4511 // this should check if the JDK version is compatible with thread
4512 // states supported by the VM. Return NULL if not compatible.
4513 //
4514 // This function must map the VM java_lang_Thread::ThreadStatus
4515 // to the Java thread state that the JDK supports.
4516 //
4517
4518 ResourceMark rm;
4519
4520 // Check if threads is null
4521 if (values == NULL) {
4522 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4523 }
4524
4525 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4526 typeArrayHandle values_h(THREAD, v);
4527
4528 objArrayHandle names_h;
4529 switch (javaThreadState) {
4530 case JAVA_THREAD_STATE_NEW : {
4531 assert(values_h->length() == 1 &&
4532 values_h->int_at(0) == java_lang_Thread::NEW,
4533 "Invalid threadStatus value");
4534
4535 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4536 1, /* only 1 substate */
4537 CHECK_NULL);
4538 names_h = objArrayHandle(THREAD, r);
4539 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4540 names_h->obj_at_put(0, name());
4541 break;
4542 }
4543 case JAVA_THREAD_STATE_RUNNABLE : {
4544 assert(values_h->length() == 1 &&
4545 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4546 "Invalid threadStatus value");
4547
4548 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4549 1, /* only 1 substate */
4550 CHECK_NULL);
4551 names_h = objArrayHandle(THREAD, r);
4552 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4553 names_h->obj_at_put(0, name());
4554 break;
4555 }
4556 case JAVA_THREAD_STATE_BLOCKED : {
4557 assert(values_h->length() == 1 &&
4558 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4559 "Invalid threadStatus value");
4560
4561 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4562 1, /* only 1 substate */
4563 CHECK_NULL);
4564 names_h = objArrayHandle(THREAD, r);
4565 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4566 names_h->obj_at_put(0, name());
4567 break;
4568 }
4569 case JAVA_THREAD_STATE_WAITING : {
4570 assert(values_h->length() == 2 &&
4571 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4572 values_h->int_at(1) == java_lang_Thread::PARKED,
4573 "Invalid threadStatus value");
4574 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4575 2, /* number of substates */
4576 CHECK_NULL);
4577 names_h = objArrayHandle(THREAD, r);
4578 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4579 CHECK_NULL);
4580 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4581 CHECK_NULL);
4582 names_h->obj_at_put(0, name0());
4583 names_h->obj_at_put(1, name1());
4584 break;
4585 }
4586 case JAVA_THREAD_STATE_TIMED_WAITING : {
4587 assert(values_h->length() == 3 &&
4588 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4589 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4590 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4591 "Invalid threadStatus value");
4592 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4593 3, /* number of substates */
4594 CHECK_NULL);
4595 names_h = objArrayHandle(THREAD, r);
4596 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4597 CHECK_NULL);
4598 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4599 CHECK_NULL);
4600 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4601 CHECK_NULL);
4602 names_h->obj_at_put(0, name0());
4603 names_h->obj_at_put(1, name1());
4604 names_h->obj_at_put(2, name2());
4605 break;
4606 }
4607 case JAVA_THREAD_STATE_TERMINATED : {
4608 assert(values_h->length() == 1 &&
4609 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4610 "Invalid threadStatus value");
4611 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4612 1, /* only 1 substate */
4613 CHECK_NULL);
4614 names_h = objArrayHandle(THREAD, r);
4615 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4616 names_h->obj_at_put(0, name());
4617 break;
4618 }
4619 default:
4620 // Unknown state - probably incompatible JDK version
4621 return NULL;
4622 }
4623 return (jobjectArray) JNIHandles::make_local(env, names_h());
4624 }
4625 JVM_END
4626
4627 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4628 {
4629 memset(info, 0, info_size);
4630
4631 info->jvm_version = Abstract_VM_Version::jvm_version();
4632 info->update_version = 0; /* 0 in HotSpot Express VM */
4633 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4634
4635 // when we add a new capability in the jvm_version_info struct, we should also
4636 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4637 // counter defined in runtimeService.cpp.
4638 info->is_attachable = AttachListener::is_attach_supported();
4639 }
4640 JVM_END