1 /*
2 * Copyright (c) 1997, 2013, 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 "interpreter/bytecode.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/method.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "prims/privilegedStack.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/dtraceJSDT.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jfieldIDWorkaround.hpp"
54 #include "runtime/os.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vm_operations.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/management.hpp"
61 #include "services/threadService.hpp"
62 #include "trace/tracing.hpp"
63 #include "utilities/copy.hpp"
64 #include "utilities/defaultStream.hpp"
65 #include "utilities/dtrace.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/histogram.hpp"
68 #include "utilities/top.hpp"
69 #include "utilities/utf8.hpp"
70 #ifdef TARGET_OS_FAMILY_linux
71 # include "jvm_linux.h"
72 #endif
73 #ifdef TARGET_OS_FAMILY_solaris
74 # include "jvm_solaris.h"
75 #endif
76 #ifdef TARGET_OS_FAMILY_windows
77 # include "jvm_windows.h"
78 #endif
79 #ifdef TARGET_OS_FAMILY_bsd
80 # include "jvm_bsd.h"
81 #endif
82
83 #include <errno.h>
84
85 #ifndef USDT2
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
87 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
88 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
89 #endif /* !USDT2 */
90
91 /*
92 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
93 such ctors and calls MUST NOT come between an oop declaration/init and its
94 usage because if objects are move this may cause various memory stomps, bus
95 errors and segfaults. Here is a cookbook for causing so called "naked oop
96 failures":
97
98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
99 JVMWrapper("JVM_GetClassDeclaredFields");
100
101 // Object address to be held directly in mirror & not visible to GC
102 oop mirror = JNIHandles::resolve_non_null(ofClass);
103
104 // If this ctor can hit a safepoint, moving objects around, then
105 ComplexConstructor foo;
106
107 // Boom! mirror may point to JUNK instead of the intended object
108 (some dereference of mirror)
109
110 // Here's another call that may block for GC, making mirror stale
111 MutexLocker ml(some_lock);
112
113 // And here's an initializer that can result in a stale oop
114 // all in one step.
115 oop o = call_that_can_throw_exception(TRAPS);
116
117
118 The solution is to keep the oop declaration BELOW the ctor or function
119 call that might cause a GC, do another resolve to reassign the oop, or
120 consider use of a Handle instead of an oop so there is immunity from object
121 motion. But note that the "QUICK" entries below do not have a handlemark
122 and thus can only support use of handles passed in.
123 */
124
125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
126 ResourceMark rm;
127 int line_number = -1;
128 const char * source_file = NULL;
129 const char * trace = "explicit";
130 InstanceKlass* caller = NULL;
131 JavaThread* jthread = JavaThread::current();
132 if (jthread->has_last_Java_frame()) {
133 vframeStream vfst(jthread);
134
135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
140
141 Method* last_caller = NULL;
142
143 while (!vfst.at_end()) {
144 Method* m = vfst.method();
145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
148 break;
149 }
150 last_caller = m;
151 vfst.next();
152 }
153 // if this is called from Class.forName0 and that is called from Class.forName,
154 // then print the caller of Class.forName. If this is Class.loadClass, then print
155 // that caller, otherwise keep quiet since this should be picked up elsewhere.
156 bool found_it = false;
157 if (!vfst.at_end() &&
158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
159 vfst.method()->name() == vmSymbols::forName0_name()) {
160 vfst.next();
161 if (!vfst.at_end() &&
162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
163 vfst.method()->name() == vmSymbols::forName_name()) {
164 vfst.next();
165 found_it = true;
166 }
167 } else if (last_caller != NULL &&
168 last_caller->method_holder()->name() ==
169 vmSymbols::java_lang_ClassLoader() &&
170 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
171 last_caller->name() == vmSymbols::loadClass_name())) {
172 found_it = true;
173 } else if (!vfst.at_end()) {
174 if (vfst.method()->is_native()) {
175 // JNI call
176 found_it = true;
177 }
178 }
179 if (found_it && !vfst.at_end()) {
180 // found the caller
181 caller = vfst.method()->method_holder();
182 line_number = vfst.method()->line_number_from_bci(vfst.bci());
183 if (line_number == -1) {
184 // show method name if it's a native method
185 trace = vfst.method()->name_and_sig_as_C_string();
186 }
187 Symbol* s = caller->source_file_name();
188 if (s != NULL) {
189 source_file = s->as_C_string();
190 }
191 }
192 }
193 if (caller != NULL) {
194 if (to_class != caller) {
195 const char * from = caller->external_name();
196 const char * to = to_class->external_name();
197 // print in a single call to reduce interleaving between threads
198 if (source_file != NULL) {
199 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
200 } else {
201 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
202 }
203 }
204 }
205 }
206
207 void trace_class_resolution(Klass* to_class) {
208 EXCEPTION_MARK;
209 trace_class_resolution_impl(to_class, THREAD);
210 if (HAS_PENDING_EXCEPTION) {
211 CLEAR_PENDING_EXCEPTION;
212 }
213 }
214
215 // Wrapper to trace JVM functions
216
217 #ifdef ASSERT
218 class JVMTraceWrapper : public StackObj {
219 public:
220 JVMTraceWrapper(const char* format, ...) {
221 if (TraceJVMCalls) {
222 va_list ap;
223 va_start(ap, format);
224 tty->print("JVM ");
225 tty->vprint_cr(format, ap);
226 va_end(ap);
227 }
228 }
229 };
230
231 Histogram* JVMHistogram;
232 volatile jint JVMHistogram_lock = 0;
233
234 class JVMHistogramElement : public HistogramElement {
235 public:
236 JVMHistogramElement(const char* name);
237 };
238
239 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
240 _name = elementName;
241 uintx count = 0;
242
243 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
244 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
245 count +=1;
246 if ( (WarnOnStalledSpinLock > 0)
247 && (count % WarnOnStalledSpinLock == 0)) {
248 warning("JVMHistogram_lock seems to be stalled");
249 }
250 }
251 }
252
253 if(JVMHistogram == NULL)
254 JVMHistogram = new Histogram("JVM Call Counts",100);
255
256 JVMHistogram->add_element(this);
257 Atomic::dec(&JVMHistogram_lock);
258 }
259
260 #define JVMCountWrapper(arg) \
261 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
262 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
263
264 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
265 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
266 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
267 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
268 #else
269 #define JVMWrapper(arg1)
270 #define JVMWrapper2(arg1, arg2)
271 #define JVMWrapper3(arg1, arg2, arg3)
272 #define JVMWrapper4(arg1, arg2, arg3, arg4)
273 #endif
274
275
276 // Interface version /////////////////////////////////////////////////////////////////////
277
278
279 JVM_LEAF(jint, JVM_GetInterfaceVersion())
280 return JVM_INTERFACE_VERSION;
281 JVM_END
282
283
284 // java.lang.System //////////////////////////////////////////////////////////////////////
285
286
287 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
288 JVMWrapper("JVM_CurrentTimeMillis");
289 return os::javaTimeMillis();
290 JVM_END
291
292 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
293 JVMWrapper("JVM_NanoTime");
294 return os::javaTimeNanos();
295 JVM_END
296
297
298 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
299 jobject dst, jint dst_pos, jint length))
300 JVMWrapper("JVM_ArrayCopy");
301 // Check if we have null pointers
302 if (src == NULL || dst == NULL) {
303 THROW(vmSymbols::java_lang_NullPointerException());
304 }
305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
307 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
308 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
309 // Do copy
310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
311 JVM_END
312
313
314 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
315 JavaValue r(T_OBJECT);
316 // public synchronized Object put(Object key, Object value);
317 HandleMark hm(THREAD);
318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
320 JavaCalls::call_virtual(&r,
321 props,
322 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
323 vmSymbols::put_name(),
324 vmSymbols::object_object_object_signature(),
325 key_str,
326 value_str,
327 THREAD);
328 }
329
330
331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
332
333
334 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
335 JVMWrapper("JVM_InitProperties");
336 ResourceMark rm;
337
338 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
339
340 // System property list includes both user set via -D option and
341 // jvm system specific properties.
342 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
343 PUTPROP(props, p->key(), p->value());
344 }
345
346 // Convert the -XX:MaxDirectMemorySize= command line flag
347 // to the sun.nio.MaxDirectMemorySize property.
348 // Do this after setting user properties to prevent people
349 // from setting the value with a -D option, as requested.
350 {
351 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
352 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
353 } else {
354 char as_chars[256];
355 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
357 }
358 }
359
360 // JVM monitoring and management support
361 // Add the sun.management.compiler property for the compiler's name
362 {
363 #undef CSIZE
364 #if defined(_LP64) || defined(_WIN64)
365 #define CSIZE "64-Bit "
366 #else
367 #define CSIZE
368 #endif // 64bit
369
370 #ifdef TIERED
371 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
372 #else
373 #if defined(COMPILER1)
374 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
375 #elif defined(COMPILER2)
376 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
377 #else
378 const char* compiler_name = "";
379 #endif // compilers
380 #endif // TIERED
381
382 if (*compiler_name != '\0' &&
383 (Arguments::mode() != Arguments::_int)) {
384 PUTPROP(props, "sun.management.compiler", compiler_name);
385 }
386 }
387
388 return properties;
389 JVM_END
390
391
392 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
393
394 extern volatile jint vm_created;
395
396 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
397 if (vm_created != 0 && (code == 0)) {
398 // The VM is about to exit. We call back into Java to check whether finalizers should be run
399 Universe::run_finalizers_on_exit();
400 }
401 before_exit(thread);
402 vm_exit(code);
403 JVM_END
404
405
406 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
407 before_exit(thread);
408 vm_exit(code);
409 JVM_END
410
411
412 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
413 register_on_exit_function(func);
414 JVM_END
415
416
417 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
418 JVMWrapper("JVM_GC");
419 if (!DisableExplicitGC) {
420 Universe::heap()->collect(GCCause::_java_lang_system_gc);
421 }
422 JVM_END
423
424
425 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
426 JVMWrapper("JVM_MaxObjectInspectionAge");
427 return Universe::heap()->millis_since_last_gc();
428 JVM_END
429
430
431 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
432 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
433 JVM_END
434
435
436 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
437 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
438 JVM_END
439
440 static inline jlong convert_size_t_to_jlong(size_t val) {
441 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
442 NOT_LP64 (return (jlong)val;)
443 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
444 }
445
446 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
447 JVMWrapper("JVM_TotalMemory");
448 size_t n = Universe::heap()->capacity();
449 return convert_size_t_to_jlong(n);
450 JVM_END
451
452
453 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
454 JVMWrapper("JVM_FreeMemory");
455 CollectedHeap* ch = Universe::heap();
456 size_t n;
457 {
458 MutexLocker x(Heap_lock);
459 n = ch->capacity() - ch->used();
460 }
461 return convert_size_t_to_jlong(n);
462 JVM_END
463
464
465 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
466 JVMWrapper("JVM_MaxMemory");
467 size_t n = Universe::heap()->max_capacity();
468 return convert_size_t_to_jlong(n);
469 JVM_END
470
471
472 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
473 JVMWrapper("JVM_ActiveProcessorCount");
474 return os::active_processor_count();
475 JVM_END
476
477
478
479 // java.lang.Throwable //////////////////////////////////////////////////////
480
481
482 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
483 JVMWrapper("JVM_FillInStackTrace");
484 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
485 java_lang_Throwable::fill_in_stack_trace(exception);
486 JVM_END
487
488
489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
490 JVMWrapper("JVM_GetStackTraceDepth");
491 oop exception = JNIHandles::resolve(throwable);
492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
493 JVM_END
494
495
496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
497 JVMWrapper("JVM_GetStackTraceElement");
498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
499 oop exception = JNIHandles::resolve(throwable);
500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
501 return JNIHandles::make_local(env, element);
502 JVM_END
503
504
505 // java.lang.Object ///////////////////////////////////////////////
506
507
508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
509 JVMWrapper("JVM_IHashCode");
510 // as implemented in the classic virtual machine; return 0 if object is NULL
511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
512 JVM_END
513
514
515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
516 JVMWrapper("JVM_MonitorWait");
517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
518 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
519 if (JvmtiExport::should_post_monitor_wait()) {
520 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
521 }
522 ObjectSynchronizer::wait(obj, ms, CHECK);
523 JVM_END
524
525
526 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
527 JVMWrapper("JVM_MonitorNotify");
528 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
529 ObjectSynchronizer::notify(obj, CHECK);
530 JVM_END
531
532
533 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
534 JVMWrapper("JVM_MonitorNotifyAll");
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
536 ObjectSynchronizer::notifyall(obj, CHECK);
537 JVM_END
538
539
540 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
541 JVMWrapper("JVM_Clone");
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
543 const KlassHandle klass (THREAD, obj->klass());
544 JvmtiVMObjectAllocEventCollector oam;
545
546 #ifdef ASSERT
547 // Just checking that the cloneable flag is set correct
548 if (obj->is_array()) {
549 guarantee(klass->is_cloneable(), "all arrays are cloneable");
550 } else {
551 guarantee(obj->is_instance(), "should be instanceOop");
552 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
553 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
554 }
555 #endif
556
557 // Check if class of obj supports the Cloneable interface.
558 // All arrays are considered to be cloneable (See JLS 20.1.5)
559 if (!klass->is_cloneable()) {
560 ResourceMark rm(THREAD);
561 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
562 }
563
564 // Make shallow object copy
565 const int size = obj->size();
566 oop new_obj = NULL;
567 if (obj->is_array()) {
568 const int length = ((arrayOop)obj())->length();
569 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
570 } else {
571 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
572 }
573 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
574 // is modifying a reference field in the clonee, a non-oop-atomic copy might
575 // be suspended in the middle of copying the pointer and end up with parts
576 // of two different pointers in the field. Subsequent dereferences will crash.
577 // 4846409: an oop-copy of objects with long or double fields or arrays of same
578 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
579 // of oops. We know objects are aligned on a minimum of an jlong boundary.
580 // The same is true of StubRoutines::object_copy and the various oop_copy
581 // variants, and of the code generated by the inline_native_clone intrinsic.
582 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
583 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
584 (size_t)align_object_size(size) / HeapWordsPerLong);
585 // Clear the header
586 new_obj->init_mark();
587
588 // Store check (mark entire object and let gc sort it out)
589 BarrierSet* bs = Universe::heap()->barrier_set();
590 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
591 bs->write_region(MemRegion((HeapWord*)new_obj, size));
592
593 // Caution: this involves a java upcall, so the clone should be
594 // "gc-robust" by this stage.
595 if (klass->has_finalizer()) {
596 assert(obj->is_instance(), "should be instanceOop");
597 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
598 }
599
600 return JNIHandles::make_local(env, oop(new_obj));
601 JVM_END
602
603 // java.lang.Compiler ////////////////////////////////////////////////////
604
605 // The initial cuts of the HotSpot VM will not support JITs, and all existing
606 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
607 // functions are all silently ignored unless JVM warnings are printed.
608
609 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
610 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
611 JVM_END
612
613
614 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
615 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
616 return JNI_FALSE;
617 JVM_END
618
619
620 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
621 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
622 return JNI_FALSE;
623 JVM_END
624
625
626 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
627 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
628 return JNI_FALSE;
629 JVM_END
630
631
632 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
633 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
634 return NULL;
635 JVM_END
636
637
638 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
639 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
640 JVM_END
641
642
643 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
644 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
645 JVM_END
646
647
648
649 // Error message support //////////////////////////////////////////////////////
650
651 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
652 JVMWrapper("JVM_GetLastErrorString");
653 return (jint)os::lasterror(buf, len);
654 JVM_END
655
656
657 // java.io.File ///////////////////////////////////////////////////////////////
658
659 JVM_LEAF(char*, JVM_NativePath(char* path))
660 JVMWrapper2("JVM_NativePath (%s)", path);
661 return os::native_path(path);
662 JVM_END
663
664
665 // Misc. class handling ///////////////////////////////////////////////////////////
666
667
668 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
669 JVMWrapper("JVM_GetCallerClass");
670
671 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
672 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
673 // temporarily for existing code to use until a replacement API is defined.
674 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
675 Klass* k = thread->security_get_caller_class(depth);
676 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
677 }
678
679 // Getting the class of the caller frame.
680 //
681 // The call stack at this point looks something like this:
682 //
683 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
684 // [1] [ @CallerSensitive API.method ]
685 // [.] [ (skipped intermediate frames) ]
686 // [n] [ caller ]
687 vframeStream vfst(thread);
688 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
689 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
690 Method* m = vfst.method();
691 assert(m != NULL, "sanity");
692 switch (n) {
693 case 0:
694 // This must only be called from Reflection.getCallerClass
695 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
697 }
698 // fall-through
699 case 1:
700 // Frame 0 and 1 must be caller sensitive.
701 if (!m->caller_sensitive()) {
702 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
703 }
704 break;
705 default:
706 if (!m->is_ignored_by_security_stack_walk()) {
707 // We have reached the desired frame; return the holder class.
708 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
709 }
710 break;
711 }
712 }
713 return NULL;
714 JVM_END
715
716
717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
718 JVMWrapper("JVM_FindPrimitiveClass");
719 oop mirror = NULL;
720 BasicType t = name2type(utf);
721 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
722 mirror = Universe::java_mirror(t);
723 }
724 if (mirror == NULL) {
725 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
726 } else {
727 return (jclass) JNIHandles::make_local(env, mirror);
728 }
729 JVM_END
730
731
732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
733 JVMWrapper("JVM_ResolveClass");
734 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
735 JVM_END
736
737
738 // Returns a class loaded by the bootstrap class loader; or null
739 // if not found. ClassNotFoundException is not thrown.
740 //
741 // Rationale behind JVM_FindClassFromBootLoader
742 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
743 // b> because of (a) java.dll has a direct dependecy on the unexported
744 // private symbol "_JVM_FindClassFromClassLoader@20".
745 // c> the launcher cannot use the private symbol as it dynamically opens
746 // the entry point, so if something changes, the launcher will fail
747 // unexpectedly at runtime, it is safest for the launcher to dlopen a
748 // stable exported interface.
749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
750 // signature to change from _JVM_FindClassFromClassLoader@20 to
751 // JVM_FindClassFromClassLoader and will not be backward compatible
752 // with older JDKs.
753 // Thus a public/stable exported entry point is the right solution,
754 // public here means public in linker semantics, and is exported only
755 // to the JDK, and is not intended to be a public API.
756
757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
758 const char* name))
759 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
760
761 // Java libraries should ensure that name is never null...
762 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
763 // It's impossible to create this class; the name cannot fit
764 // into the constant pool.
765 return NULL;
766 }
767
768 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
769 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
770 if (k == NULL) {
771 return NULL;
772 }
773
774 if (TraceClassResolution) {
775 trace_class_resolution(k);
776 }
777 return (jclass) JNIHandles::make_local(env, k->java_mirror());
778 JVM_END
779
780 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
781 jboolean init, jobject loader,
782 jboolean throwError))
783 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
784 throwError ? "error" : "exception");
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 if (throwError) {
790 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
791 } else {
792 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
793 }
794 }
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Handle h_loader(THREAD, JNIHandles::resolve(loader));
797 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
798 Handle(), throwError, THREAD);
799
800 if (TraceClassResolution && result != NULL) {
801 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
802 }
803 return result;
804 JVM_END
805
806
807 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
808 jboolean init, jclass from))
809 JVMWrapper2("JVM_FindClassFromClass %s", name);
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
814 }
815 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
816 oop from_class_oop = JNIHandles::resolve(from);
817 Klass* from_class = (from_class_oop == NULL)
818 ? (Klass*)NULL
819 : java_lang_Class::as_Klass(from_class_oop);
820 oop class_loader = NULL;
821 oop protection_domain = NULL;
822 if (from_class != NULL) {
823 class_loader = from_class->class_loader();
824 protection_domain = from_class->protection_domain();
825 }
826 Handle h_loader(THREAD, class_loader);
827 Handle h_prot (THREAD, protection_domain);
828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
829 h_prot, true, thread);
830
831 if (TraceClassResolution && result != NULL) {
832 // this function is generally only used for class loading during verification.
833 ResourceMark rm;
834 oop from_mirror = JNIHandles::resolve_non_null(from);
835 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
836 const char * from_name = from_class->external_name();
837
838 oop mirror = JNIHandles::resolve_non_null(result);
839 Klass* to_class = java_lang_Class::as_Klass(mirror);
840 const char * to = to_class->external_name();
841 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
842 }
843
844 return result;
845 JVM_END
846
847 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
848 if (loader.is_null()) {
849 return;
850 }
851
852 // check whether the current caller thread holds the lock or not.
853 // If not, increment the corresponding counter
854 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
855 ObjectSynchronizer::owner_self) {
856 counter->inc();
857 }
858 }
859
860 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
861 // and JVM_DefineClassWithSourceCond()
862 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
863 jobject loader, const jbyte *buf,
864 jsize len, jobject pd, const char *source,
865 jboolean verify, TRAPS) {
866 if (source == NULL) source = "__JVM_DefineClass__";
867
868 assert(THREAD->is_Java_thread(), "must be a JavaThread");
869 JavaThread* jt = (JavaThread*) THREAD;
870
871 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
872 ClassLoader::perf_define_appclass_selftime(),
873 ClassLoader::perf_define_appclasses(),
874 jt->get_thread_stat()->perf_recursion_counts_addr(),
875 jt->get_thread_stat()->perf_timers_addr(),
876 PerfClassTraceTime::DEFINE_CLASS);
877
878 if (UsePerfData) {
879 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
880 }
881
882 // Since exceptions can be thrown, class initialization can take place
883 // if name is NULL no check for class name in .class stream has to be made.
884 TempNewSymbol class_name = NULL;
885 if (name != NULL) {
886 const int str_len = (int)strlen(name);
887 if (str_len > Symbol::max_length()) {
888 // It's impossible to create this class; the name cannot fit
889 // into the constant pool.
890 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
891 }
892 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
893 }
894
895 ResourceMark rm(THREAD);
896 ClassFileStream st((u1*) buf, len, (char *)source);
897 Handle class_loader (THREAD, JNIHandles::resolve(loader));
898 if (UsePerfData) {
899 is_lock_held_by_thread(class_loader,
900 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
901 THREAD);
902 }
903 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
904 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
905 protection_domain, &st,
906 verify != 0,
907 CHECK_NULL);
908
909 if (TraceClassResolution && k != NULL) {
910 trace_class_resolution(k);
911 }
912
913 return (jclass) JNIHandles::make_local(env, k->java_mirror());
914 }
915
916
917 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
918 JVMWrapper2("JVM_DefineClass %s", name);
919
920 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
921 JVM_END
922
923
924 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
925 JVMWrapper2("JVM_DefineClassWithSource %s", name);
926
927 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
928 JVM_END
929
930 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
931 jobject loader, const jbyte *buf,
932 jsize len, jobject pd,
933 const char *source, jboolean verify))
934 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
935
936 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
937 JVM_END
938
939 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
940 JVMWrapper("JVM_FindLoadedClass");
941 ResourceMark rm(THREAD);
942
943 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
944 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
945
946 const char* str = java_lang_String::as_utf8_string(string());
947 // Sanity check, don't expect null
948 if (str == NULL) return NULL;
949
950 const int str_len = (int)strlen(str);
951 if (str_len > Symbol::max_length()) {
952 // It's impossible to create this class; the name cannot fit
953 // into the constant pool.
954 return NULL;
955 }
956 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
957
958 // Security Note:
959 // The Java level wrapper will perform the necessary security check allowing
960 // us to pass the NULL as the initiating class loader.
961 Handle h_loader(THREAD, JNIHandles::resolve(loader));
962 if (UsePerfData) {
963 is_lock_held_by_thread(h_loader,
964 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
965 THREAD);
966 }
967
968 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
969 h_loader,
970 Handle(),
971 CHECK_NULL);
972
973 return (k == NULL) ? NULL :
974 (jclass) JNIHandles::make_local(env, k->java_mirror());
975 JVM_END
976
977
978 // Reflection support //////////////////////////////////////////////////////////////////////////////
979
980 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
981 assert (cls != NULL, "illegal class");
982 JVMWrapper("JVM_GetClassName");
983 JvmtiVMObjectAllocEventCollector oam;
984 ResourceMark rm(THREAD);
985 const char* name;
986 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
987 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
988 } else {
989 // Consider caching interned string in Klass
990 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
991 assert(k->is_klass(), "just checking");
992 name = k->external_name();
993 }
994 oop result = StringTable::intern((char*) name, CHECK_NULL);
995 return (jstring) JNIHandles::make_local(env, result);
996 JVM_END
997
998
999 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1000 JVMWrapper("JVM_GetClassInterfaces");
1001 JvmtiVMObjectAllocEventCollector oam;
1002 oop mirror = JNIHandles::resolve_non_null(cls);
1003
1004 // Special handling for primitive objects
1005 if (java_lang_Class::is_primitive(mirror)) {
1006 // Primitive objects does not have any interfaces
1007 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1008 return (jobjectArray) JNIHandles::make_local(env, r);
1009 }
1010
1011 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1012 // Figure size of result array
1013 int size;
1014 if (klass->oop_is_instance()) {
1015 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1016 } else {
1017 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1018 size = 2;
1019 }
1020
1021 // Allocate result array
1022 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1023 objArrayHandle result (THREAD, r);
1024 // Fill in result
1025 if (klass->oop_is_instance()) {
1026 // Regular instance klass, fill in all local interfaces
1027 for (int index = 0; index < size; index++) {
1028 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1029 result->obj_at_put(index, k->java_mirror());
1030 }
1031 } else {
1032 // All arrays implement java.lang.Cloneable and java.io.Serializable
1033 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1034 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1035 }
1036 return (jobjectArray) JNIHandles::make_local(env, result());
1037 JVM_END
1038
1039
1040 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1041 JVMWrapper("JVM_GetClassLoader");
1042 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1043 return NULL;
1044 }
1045 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1046 oop loader = k->class_loader();
1047 return JNIHandles::make_local(env, loader);
1048 JVM_END
1049
1050
1051 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1052 JVMWrapper("JVM_IsInterface");
1053 oop mirror = JNIHandles::resolve_non_null(cls);
1054 if (java_lang_Class::is_primitive(mirror)) {
1055 return JNI_FALSE;
1056 }
1057 Klass* k = java_lang_Class::as_Klass(mirror);
1058 jboolean result = k->is_interface();
1059 assert(!result || k->oop_is_instance(),
1060 "all interfaces are instance types");
1061 // The compiler intrinsic for isInterface tests the
1062 // Klass::_access_flags bits in the same way.
1063 return result;
1064 JVM_END
1065
1066
1067 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1068 JVMWrapper("JVM_GetClassSigners");
1069 JvmtiVMObjectAllocEventCollector oam;
1070 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1071 // There are no signers for primitive types
1072 return NULL;
1073 }
1074
1075 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1076
1077 // If there are no signers set in the class, or if the class
1078 // is an array, return NULL.
1079 if (signers == NULL) return NULL;
1080
1081 // copy of the signers array
1082 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1083 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1084 for (int index = 0; index < signers->length(); index++) {
1085 signers_copy->obj_at_put(index, signers->obj_at(index));
1086 }
1087
1088 // return the copy
1089 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1090 JVM_END
1091
1092
1093 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1094 JVMWrapper("JVM_SetClassSigners");
1095 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096 // This call is ignored for primitive types and arrays.
1097 // Signers are only set once, ClassLoader.java, and thus shouldn't
1098 // be called with an array. Only the bootstrap loader creates arrays.
1099 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1100 if (k->oop_is_instance()) {
1101 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1102 }
1103 }
1104 JVM_END
1105
1106
1107 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1108 JVMWrapper("JVM_GetProtectionDomain");
1109 if (JNIHandles::resolve(cls) == NULL) {
1110 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1111 }
1112
1113 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1114 // Primitive types does not have a protection domain.
1115 return NULL;
1116 }
1117
1118 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1119 return (jobject) JNIHandles::make_local(env, pd);
1120 JVM_END
1121
1122
1123 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1124 // If there is a security manager and protection domain, check the access
1125 // in the protection domain, otherwise it is authorized.
1126 if (java_lang_System::has_security_manager()) {
1127
1128 // For bootstrapping, if pd implies method isn't in the JDK, allow
1129 // this context to revert to older behavior.
1130 // In this case the isAuthorized field in AccessControlContext is also not
1131 // present.
1132 if (Universe::protection_domain_implies_method() == NULL) {
1133 return true;
1134 }
1135
1136 // Whitelist certain access control contexts
1137 if (java_security_AccessControlContext::is_authorized(context)) {
1138 return true;
1139 }
1140
1141 oop prot = klass->protection_domain();
1142 if (prot != NULL) {
1143 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1144 // in the new wrapper.
1145 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1146 Handle h_prot(THREAD, prot);
1147 JavaValue result(T_BOOLEAN);
1148 JavaCallArguments args(h_prot);
1149 JavaCalls::call(&result, m, &args, CHECK_false);
1150 return (result.get_jboolean() != 0);
1151 }
1152 }
1153 return true;
1154 }
1155
1156 // Create an AccessControlContext with a protection domain with null codesource
1157 // and null permissions - which gives no permissions.
1158 oop create_dummy_access_control_context(TRAPS) {
1159 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1160 // new ProtectionDomain(null,null);
1161 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1162 Handle null_pd(THREAD, null_protection_domain);
1163
1164 // new ProtectionDomain[] {pd};
1165 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1166 context->obj_at_put(0, null_pd());
1167
1168 // new AccessControlContext(new ProtectionDomain[] {pd})
1169 objArrayHandle h_context(THREAD, context);
1170 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1171 return result;
1172 }
1173
1174 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1175 JVMWrapper("JVM_DoPrivileged");
1176
1177 if (action == NULL) {
1178 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1179 }
1180
1181 // Compute the frame initiating the do privileged operation and setup the privileged stack
1182 vframeStream vfst(thread);
1183 vfst.security_get_caller_frame(1);
1184
1185 if (vfst.at_end()) {
1186 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1187 }
1188
1189 Method* method = vfst.method();
1190 instanceKlassHandle klass (THREAD, method->method_holder());
1191
1192 // Check that action object understands "Object run()"
1193 Handle h_context;
1194 if (context != NULL) {
1195 h_context = Handle(THREAD, JNIHandles::resolve(context));
1196 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1197 if (!authorized) {
1198 // Create an unprivileged access control object and call it's run function
1199 // instead.
1200 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1201 h_context = Handle(THREAD, noprivs);
1202 }
1203 }
1204
1205 // Check that action object understands "Object run()"
1206 Handle object (THREAD, JNIHandles::resolve(action));
1207
1208 // get run() method
1209 Method* m_oop = object->klass()->uncached_lookup_method(
1210 vmSymbols::run_method_name(),
1211 vmSymbols::void_object_signature());
1212 methodHandle m (THREAD, m_oop);
1213 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1214 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1215 }
1216
1217 // Stack allocated list of privileged stack elements
1218 PrivilegedElement pi;
1219 if (!vfst.at_end()) {
1220 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1221 thread->set_privileged_stack_top(&pi);
1222 }
1223
1224
1225 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1226 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1227 Handle pending_exception;
1228 JavaValue result(T_OBJECT);
1229 JavaCallArguments args(object);
1230 JavaCalls::call(&result, m, &args, THREAD);
1231
1232 // done with action, remove ourselves from the list
1233 if (!vfst.at_end()) {
1234 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1235 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1236 }
1237
1238 if (HAS_PENDING_EXCEPTION) {
1239 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1240 CLEAR_PENDING_EXCEPTION;
1241
1242 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1243 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1244 // Throw a java.security.PrivilegedActionException(Exception e) exception
1245 JavaCallArguments args(pending_exception);
1246 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1247 vmSymbols::exception_void_signature(),
1248 &args);
1249 }
1250 }
1251
1252 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1253 return JNIHandles::make_local(env, (oop) result.get_jobject());
1254 JVM_END
1255
1256
1257 // Returns the inherited_access_control_context field of the running thread.
1258 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1259 JVMWrapper("JVM_GetInheritedAccessControlContext");
1260 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1261 return JNIHandles::make_local(env, result);
1262 JVM_END
1263
1264 class RegisterArrayForGC {
1265 private:
1266 JavaThread *_thread;
1267 public:
1268 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1269 _thread = thread;
1270 _thread->register_array_for_gc(array);
1271 }
1272
1273 ~RegisterArrayForGC() {
1274 _thread->register_array_for_gc(NULL);
1275 }
1276 };
1277
1278
1279 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1280 JVMWrapper("JVM_GetStackAccessControlContext");
1281 if (!UsePrivilegedStack) return NULL;
1282
1283 ResourceMark rm(THREAD);
1284 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1285 JvmtiVMObjectAllocEventCollector oam;
1286
1287 // count the protection domains on the execution stack. We collapse
1288 // duplicate consecutive protection domains into a single one, as
1289 // well as stopping when we hit a privileged frame.
1290
1291 // Use vframeStream to iterate through Java frames
1292 vframeStream vfst(thread);
1293
1294 oop previous_protection_domain = NULL;
1295 Handle privileged_context(thread, NULL);
1296 bool is_privileged = false;
1297 oop protection_domain = NULL;
1298
1299 for(; !vfst.at_end(); vfst.next()) {
1300 // get method of frame
1301 Method* method = vfst.method();
1302 intptr_t* frame_id = vfst.frame_id();
1303
1304 // check the privileged frames to see if we have a match
1305 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1306 // this frame is privileged
1307 is_privileged = true;
1308 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1309 protection_domain = thread->privileged_stack_top()->protection_domain();
1310 } else {
1311 protection_domain = method->method_holder()->protection_domain();
1312 }
1313
1314 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1315 local_array->push(protection_domain);
1316 previous_protection_domain = protection_domain;
1317 }
1318
1319 if (is_privileged) break;
1320 }
1321
1322
1323 // either all the domains on the stack were system domains, or
1324 // we had a privileged system domain
1325 if (local_array->is_empty()) {
1326 if (is_privileged && privileged_context.is_null()) return NULL;
1327
1328 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1329 return JNIHandles::make_local(env, result);
1330 }
1331
1332 // the resource area must be registered in case of a gc
1333 RegisterArrayForGC ragc(thread, local_array);
1334 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1335 local_array->length(), CHECK_NULL);
1336 objArrayHandle h_context(thread, context);
1337 for (int index = 0; index < local_array->length(); index++) {
1338 h_context->obj_at_put(index, local_array->at(index));
1339 }
1340
1341 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1342
1343 return JNIHandles::make_local(env, result);
1344 JVM_END
1345
1346
1347 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1348 JVMWrapper("JVM_IsArrayClass");
1349 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1350 return (k != NULL) && k->oop_is_array() ? true : false;
1351 JVM_END
1352
1353
1354 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1355 JVMWrapper("JVM_IsPrimitiveClass");
1356 oop mirror = JNIHandles::resolve_non_null(cls);
1357 return (jboolean) java_lang_Class::is_primitive(mirror);
1358 JVM_END
1359
1360
1361 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1362 JVMWrapper("JVM_GetComponentType");
1363 oop mirror = JNIHandles::resolve_non_null(cls);
1364 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1365 return (jclass) JNIHandles::make_local(env, result);
1366 JVM_END
1367
1368
1369 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1370 JVMWrapper("JVM_GetClassModifiers");
1371 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1372 // Primitive type
1373 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1374 }
1375
1376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1377 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1378 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1379 return k->modifier_flags();
1380 JVM_END
1381
1382
1383 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1384
1385 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1386 JvmtiVMObjectAllocEventCollector oam;
1387 // ofClass is a reference to a java_lang_Class object. The mirror object
1388 // of an InstanceKlass
1389
1390 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1391 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1392 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1393 return (jobjectArray)JNIHandles::make_local(env, result);
1394 }
1395
1396 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1397 InnerClassesIterator iter(k);
1398
1399 if (iter.length() == 0) {
1400 // Neither an inner nor outer class
1401 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1402 return (jobjectArray)JNIHandles::make_local(env, result);
1403 }
1404
1405 // find inner class info
1406 constantPoolHandle cp(thread, k->constants());
1407 int length = iter.length();
1408
1409 // Allocate temp. result array
1410 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1411 objArrayHandle result (THREAD, r);
1412 int members = 0;
1413
1414 for (; !iter.done(); iter.next()) {
1415 int ioff = iter.inner_class_info_index();
1416 int ooff = iter.outer_class_info_index();
1417
1418 if (ioff != 0 && ooff != 0) {
1419 // Check to see if the name matches the class we're looking for
1420 // before attempting to find the class.
1421 if (cp->klass_name_at_matches(k, ooff)) {
1422 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1423 if (outer_klass == k()) {
1424 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1425 instanceKlassHandle inner_klass (THREAD, ik);
1426
1427 // Throws an exception if outer klass has not declared k as
1428 // an inner klass
1429 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1430
1431 result->obj_at_put(members, inner_klass->java_mirror());
1432 members++;
1433 }
1434 }
1435 }
1436 }
1437
1438 if (members != length) {
1439 // Return array of right length
1440 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1441 for(int i = 0; i < members; i++) {
1442 res->obj_at_put(i, result->obj_at(i));
1443 }
1444 return (jobjectArray)JNIHandles::make_local(env, res);
1445 }
1446
1447 return (jobjectArray)JNIHandles::make_local(env, result());
1448 JVM_END
1449
1450
1451 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1452 {
1453 // ofClass is a reference to a java_lang_Class object.
1454 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1455 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1456 return NULL;
1457 }
1458
1459 bool inner_is_member = false;
1460 Klass* outer_klass
1461 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1462 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1463 if (outer_klass == NULL) return NULL; // already a top-level class
1464 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1465 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1466 }
1467 JVM_END
1468
1469 // should be in InstanceKlass.cpp, but is here for historical reasons
1470 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1471 bool* inner_is_member,
1472 TRAPS) {
1473 Thread* thread = THREAD;
1474 InnerClassesIterator iter(k);
1475 if (iter.length() == 0) {
1476 // No inner class info => no declaring class
1477 return NULL;
1478 }
1479
1480 constantPoolHandle i_cp(thread, k->constants());
1481
1482 bool found = false;
1483 Klass* ok;
1484 instanceKlassHandle outer_klass;
1485 *inner_is_member = false;
1486
1487 // Find inner_klass attribute
1488 for (; !iter.done() && !found; iter.next()) {
1489 int ioff = iter.inner_class_info_index();
1490 int ooff = iter.outer_class_info_index();
1491 int noff = iter.inner_name_index();
1492 if (ioff != 0) {
1493 // Check to see if the name matches the class we're looking for
1494 // before attempting to find the class.
1495 if (i_cp->klass_name_at_matches(k, ioff)) {
1496 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1497 found = (k() == inner_klass);
1498 if (found && ooff != 0) {
1499 ok = i_cp->klass_at(ooff, CHECK_NULL);
1500 outer_klass = instanceKlassHandle(thread, ok);
1501 *inner_is_member = true;
1502 }
1503 }
1504 }
1505 }
1506
1507 if (found && outer_klass.is_null()) {
1508 // It may be anonymous; try for that.
1509 int encl_method_class_idx = k->enclosing_method_class_index();
1510 if (encl_method_class_idx != 0) {
1511 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1512 outer_klass = instanceKlassHandle(thread, ok);
1513 *inner_is_member = false;
1514 }
1515 }
1516
1517 // If no inner class attribute found for this class.
1518 if (outer_klass.is_null()) return NULL;
1519
1520 // Throws an exception if outer klass has not declared k as an inner klass
1521 // We need evidence that each klass knows about the other, or else
1522 // the system could allow a spoof of an inner class to gain access rights.
1523 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1524 return outer_klass();
1525 }
1526
1527 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1528 assert (cls != NULL, "illegal class");
1529 JVMWrapper("JVM_GetClassSignature");
1530 JvmtiVMObjectAllocEventCollector oam;
1531 ResourceMark rm(THREAD);
1532 // Return null for arrays and primatives
1533 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1535 if (k->oop_is_instance()) {
1536 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1537 if (sym == NULL) return NULL;
1538 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1539 return (jstring) JNIHandles::make_local(env, str());
1540 }
1541 }
1542 return NULL;
1543 JVM_END
1544
1545
1546 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1547 assert (cls != NULL, "illegal class");
1548 JVMWrapper("JVM_GetClassAnnotations");
1549
1550 // Return null for arrays and primitives
1551 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1553 if (k->oop_is_instance()) {
1554 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1555 return (jbyteArray) JNIHandles::make_local(env, a);
1556 }
1557 }
1558 return NULL;
1559 JVM_END
1560
1561
1562 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1563 // some of this code was adapted from from jni_FromReflectedField
1564
1565 oop reflected = JNIHandles::resolve_non_null(field);
1566 oop mirror = java_lang_reflect_Field::clazz(reflected);
1567 Klass* k = java_lang_Class::as_Klass(mirror);
1568 int slot = java_lang_reflect_Field::slot(reflected);
1569 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1570
1571 KlassHandle kh(THREAD, k);
1572 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1573
1574 if (modifiers & JVM_ACC_STATIC) {
1575 // for static fields we only look in the current class
1576 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1577 assert(false, "cannot find static field");
1578 return false;
1579 }
1580 } else {
1581 // for instance fields we start with the current class and work
1582 // our way up through the superclass chain
1583 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1584 assert(false, "cannot find instance field");
1585 return false;
1586 }
1587 }
1588 return true;
1589 }
1590
1591 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1592 // field is a handle to a java.lang.reflect.Field object
1593 assert(field != NULL, "illegal field");
1594 JVMWrapper("JVM_GetFieldAnnotations");
1595
1596 fieldDescriptor fd;
1597 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1598 if (!gotFd) {
1599 return NULL;
1600 }
1601
1602 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1603 JVM_END
1604
1605
1606 static Method* jvm_get_method_common(jobject method) {
1607 // some of this code was adapted from from jni_FromReflectedMethod
1608
1609 oop reflected = JNIHandles::resolve_non_null(method);
1610 oop mirror = NULL;
1611 int slot = 0;
1612
1613 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1614 mirror = java_lang_reflect_Constructor::clazz(reflected);
1615 slot = java_lang_reflect_Constructor::slot(reflected);
1616 } else {
1617 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1618 "wrong type");
1619 mirror = java_lang_reflect_Method::clazz(reflected);
1620 slot = java_lang_reflect_Method::slot(reflected);
1621 }
1622 Klass* k = java_lang_Class::as_Klass(mirror);
1623
1624 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1625 assert(m != NULL, "cannot find method");
1626 return m; // caller has to deal with NULL in product mode
1627 }
1628
1629
1630 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1631 JVMWrapper("JVM_GetMethodAnnotations");
1632
1633 // method is a handle to a java.lang.reflect.Method object
1634 Method* m = jvm_get_method_common(method);
1635 if (m == NULL) {
1636 return NULL;
1637 }
1638
1639 return (jbyteArray) JNIHandles::make_local(env,
1640 Annotations::make_java_array(m->annotations(), THREAD));
1641 JVM_END
1642
1643
1644 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1645 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1646
1647 // method is a handle to a java.lang.reflect.Method object
1648 Method* m = jvm_get_method_common(method);
1649 if (m == NULL) {
1650 return NULL;
1651 }
1652
1653 return (jbyteArray) JNIHandles::make_local(env,
1654 Annotations::make_java_array(m->annotation_default(), THREAD));
1655 JVM_END
1656
1657
1658 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1659 JVMWrapper("JVM_GetMethodParameterAnnotations");
1660
1661 // method is a handle to a java.lang.reflect.Method object
1662 Method* m = jvm_get_method_common(method);
1663 if (m == NULL) {
1664 return NULL;
1665 }
1666
1667 return (jbyteArray) JNIHandles::make_local(env,
1668 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1669 JVM_END
1670
1671 /* Type use annotations support (JDK 1.8) */
1672
1673 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1674 assert (cls != NULL, "illegal class");
1675 JVMWrapper("JVM_GetClassTypeAnnotations");
1676 ResourceMark rm(THREAD);
1677 // Return null for arrays and primitives
1678 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1679 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1680 if (k->oop_is_instance()) {
1681 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1682 if (type_annotations != NULL) {
1683 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1684 return (jbyteArray) JNIHandles::make_local(env, a);
1685 }
1686 }
1687 }
1688 return NULL;
1689 JVM_END
1690
1691 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1692 assert (method != NULL, "illegal method");
1693 JVMWrapper("JVM_GetMethodTypeAnnotations");
1694
1695 // method is a handle to a java.lang.reflect.Method object
1696 Method* m = jvm_get_method_common(method);
1697 if (m == NULL) {
1698 return NULL;
1699 }
1700
1701 AnnotationArray* type_annotations = m->type_annotations();
1702 if (type_annotations != NULL) {
1703 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1704 return (jbyteArray) JNIHandles::make_local(env, a);
1705 }
1706
1707 return NULL;
1708 JVM_END
1709
1710 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1711 assert (field != NULL, "illegal field");
1712 JVMWrapper("JVM_GetFieldTypeAnnotations");
1713
1714 fieldDescriptor fd;
1715 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1716 if (!gotFd) {
1717 return NULL;
1718 }
1719
1720 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1721 JVM_END
1722
1723 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1724 if (!cp->is_within_bounds(index)) {
1725 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1726 }
1727 }
1728
1729 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1730 {
1731 JVMWrapper("JVM_GetMethodParameters");
1732 // method is a handle to a java.lang.reflect.Method object
1733 Method* method_ptr = jvm_get_method_common(method);
1734 methodHandle mh (THREAD, method_ptr);
1735 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1736 const int num_params = mh->method_parameters_length();
1737
1738 if (0 != num_params) {
1739 // make sure all the symbols are properly formatted
1740 for (int i = 0; i < num_params; i++) {
1741 MethodParametersElement* params = mh->method_parameters_start();
1742 int index = params[i].name_cp_index;
1743 bounds_check(mh->constants(), index, CHECK_NULL);
1744
1745 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1746 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1747 "Wrong type at constant pool index");
1748 }
1749
1750 }
1751
1752 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1753 objArrayHandle result (THREAD, result_oop);
1754
1755 for (int i = 0; i < num_params; i++) {
1756 MethodParametersElement* params = mh->method_parameters_start();
1757 // For a 0 index, give a NULL symbol
1758 Symbol* sym = 0 != params[i].name_cp_index ?
1759 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1760 int flags = params[i].flags;
1761 oop param = Reflection::new_parameter(reflected_method, i, sym,
1762 flags, CHECK_NULL);
1763 result->obj_at_put(i, param);
1764 }
1765 return (jobjectArray)JNIHandles::make_local(env, result());
1766 } else {
1767 return (jobjectArray)NULL;
1768 }
1769 }
1770 JVM_END
1771
1772 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1773
1774 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1775 {
1776 JVMWrapper("JVM_GetClassDeclaredFields");
1777 JvmtiVMObjectAllocEventCollector oam;
1778
1779 // Exclude primitive types and array types
1780 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1781 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1782 // Return empty array
1783 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1784 return (jobjectArray) JNIHandles::make_local(env, res);
1785 }
1786
1787 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1788 constantPoolHandle cp(THREAD, k->constants());
1789
1790 // Ensure class is linked
1791 k->link_class(CHECK_NULL);
1792
1793 // 4496456 We need to filter out java.lang.Throwable.backtrace
1794 bool skip_backtrace = false;
1795
1796 // Allocate result
1797 int num_fields;
1798
1799 if (publicOnly) {
1800 num_fields = 0;
1801 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1802 if (fs.access_flags().is_public()) ++num_fields;
1803 }
1804 } else {
1805 num_fields = k->java_fields_count();
1806
1807 if (k() == SystemDictionary::Throwable_klass()) {
1808 num_fields--;
1809 skip_backtrace = true;
1810 }
1811 }
1812
1813 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1814 objArrayHandle result (THREAD, r);
1815
1816 int out_idx = 0;
1817 fieldDescriptor fd;
1818 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1819 if (skip_backtrace) {
1820 // 4496456 skip java.lang.Throwable.backtrace
1821 int offset = fs.offset();
1822 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1823 }
1824
1825 if (!publicOnly || fs.access_flags().is_public()) {
1826 fd.reinitialize(k(), fs.index());
1827 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1828 result->obj_at_put(out_idx, field);
1829 ++out_idx;
1830 }
1831 }
1832 assert(out_idx == num_fields, "just checking");
1833 return (jobjectArray) JNIHandles::make_local(env, result());
1834 }
1835 JVM_END
1836
1837 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1838 {
1839 JVMWrapper("JVM_GetClassDeclaredMethods");
1840 JvmtiVMObjectAllocEventCollector oam;
1841
1842 // Exclude primitive types and array types
1843 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1844 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1845 // Return empty array
1846 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1847 return (jobjectArray) JNIHandles::make_local(env, res);
1848 }
1849
1850 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1851
1852 // Ensure class is linked
1853 k->link_class(CHECK_NULL);
1854
1855 Array<Method*>* methods = k->methods();
1856 int methods_length = methods->length();
1857 int num_methods = 0;
1858
1859 int i;
1860 for (i = 0; i < methods_length; i++) {
1861 methodHandle method(THREAD, methods->at(i));
1862 if (!method->is_initializer() && !method->is_overpass()) {
1863 if (!publicOnly || method->is_public()) {
1864 ++num_methods;
1865 }
1866 }
1867 }
1868
1869 // Allocate result
1870 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1871 objArrayHandle result (THREAD, r);
1872
1873 int out_idx = 0;
1874 for (i = 0; i < methods_length; i++) {
1875 methodHandle method(THREAD, methods->at(i));
1876 if (!method->is_initializer() && !method->is_overpass()) {
1877 if (!publicOnly || method->is_public()) {
1878 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1879 result->obj_at_put(out_idx, m);
1880 ++out_idx;
1881 }
1882 }
1883 }
1884 assert(out_idx == num_methods, "just checking");
1885 return (jobjectArray) JNIHandles::make_local(env, result());
1886 }
1887 JVM_END
1888
1889 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1890 {
1891 JVMWrapper("JVM_GetClassDeclaredConstructors");
1892 JvmtiVMObjectAllocEventCollector oam;
1893
1894 // Exclude primitive types and array types
1895 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1896 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1897 // Return empty array
1898 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1899 return (jobjectArray) JNIHandles::make_local(env, res);
1900 }
1901
1902 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1903
1904 // Ensure class is linked
1905 k->link_class(CHECK_NULL);
1906
1907 Array<Method*>* methods = k->methods();
1908 int methods_length = methods->length();
1909 int num_constructors = 0;
1910
1911 int i;
1912 for (i = 0; i < methods_length; i++) {
1913 methodHandle method(THREAD, methods->at(i));
1914 if (method->is_initializer() && !method->is_static()) {
1915 if (!publicOnly || method->is_public()) {
1916 ++num_constructors;
1917 }
1918 }
1919 }
1920
1921 // Allocate result
1922 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1923 objArrayHandle result(THREAD, r);
1924
1925 int out_idx = 0;
1926 for (i = 0; i < methods_length; i++) {
1927 methodHandle method(THREAD, methods->at(i));
1928 if (method->is_initializer() && !method->is_static()) {
1929 if (!publicOnly || method->is_public()) {
1930 oop m = Reflection::new_constructor(method, CHECK_NULL);
1931 result->obj_at_put(out_idx, m);
1932 ++out_idx;
1933 }
1934 }
1935 }
1936 assert(out_idx == num_constructors, "just checking");
1937 return (jobjectArray) JNIHandles::make_local(env, result());
1938 }
1939 JVM_END
1940
1941 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1942 {
1943 JVMWrapper("JVM_GetClassAccessFlags");
1944 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1945 // Primitive type
1946 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1947 }
1948
1949 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1950 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1951 }
1952 JVM_END
1953
1954
1955 // Constant pool access //////////////////////////////////////////////////////////
1956
1957 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1958 {
1959 JVMWrapper("JVM_GetClassConstantPool");
1960 JvmtiVMObjectAllocEventCollector oam;
1961
1962 // Return null for primitives and arrays
1963 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1964 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1965 if (k->oop_is_instance()) {
1966 instanceKlassHandle k_h(THREAD, k);
1967 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1968 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1969 return JNIHandles::make_local(jcp());
1970 }
1971 }
1972 return NULL;
1973 }
1974 JVM_END
1975
1976
1977 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1978 {
1979 JVMWrapper("JVM_ConstantPoolGetSize");
1980 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1981 return cp->length();
1982 }
1983 JVM_END
1984
1985
1986 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1987 {
1988 JVMWrapper("JVM_ConstantPoolGetClassAt");
1989 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1990 bounds_check(cp, index, CHECK_NULL);
1991 constantTag tag = cp->tag_at(index);
1992 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1993 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1994 }
1995 Klass* k = cp->klass_at(index, CHECK_NULL);
1996 return (jclass) JNIHandles::make_local(k->java_mirror());
1997 }
1998 JVM_END
1999
2000 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2001 {
2002 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2003 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2004 bounds_check(cp, index, CHECK_NULL);
2005 constantTag tag = cp->tag_at(index);
2006 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2007 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2008 }
2009 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2010 if (k == NULL) return NULL;
2011 return (jclass) JNIHandles::make_local(k->java_mirror());
2012 }
2013 JVM_END
2014
2015 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2016 constantTag tag = cp->tag_at(index);
2017 if (!tag.is_method() && !tag.is_interface_method()) {
2018 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2019 }
2020 int klass_ref = cp->uncached_klass_ref_index_at(index);
2021 Klass* k_o;
2022 if (force_resolution) {
2023 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2024 } else {
2025 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2026 if (k_o == NULL) return NULL;
2027 }
2028 instanceKlassHandle k(THREAD, k_o);
2029 Symbol* name = cp->uncached_name_ref_at(index);
2030 Symbol* sig = cp->uncached_signature_ref_at(index);
2031 methodHandle m (THREAD, k->find_method(name, sig));
2032 if (m.is_null()) {
2033 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2034 }
2035 oop method;
2036 if (!m->is_initializer() || m->is_static()) {
2037 method = Reflection::new_method(m, true, true, CHECK_NULL);
2038 } else {
2039 method = Reflection::new_constructor(m, CHECK_NULL);
2040 }
2041 return JNIHandles::make_local(method);
2042 }
2043
2044 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2045 {
2046 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2047 JvmtiVMObjectAllocEventCollector oam;
2048 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2049 bounds_check(cp, index, CHECK_NULL);
2050 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2051 return res;
2052 }
2053 JVM_END
2054
2055 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2056 {
2057 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2058 JvmtiVMObjectAllocEventCollector oam;
2059 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2060 bounds_check(cp, index, CHECK_NULL);
2061 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2062 return res;
2063 }
2064 JVM_END
2065
2066 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2067 constantTag tag = cp->tag_at(index);
2068 if (!tag.is_field()) {
2069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2070 }
2071 int klass_ref = cp->uncached_klass_ref_index_at(index);
2072 Klass* k_o;
2073 if (force_resolution) {
2074 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2075 } else {
2076 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2077 if (k_o == NULL) return NULL;
2078 }
2079 instanceKlassHandle k(THREAD, k_o);
2080 Symbol* name = cp->uncached_name_ref_at(index);
2081 Symbol* sig = cp->uncached_signature_ref_at(index);
2082 fieldDescriptor fd;
2083 Klass* target_klass = k->find_field(name, sig, &fd);
2084 if (target_klass == NULL) {
2085 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2086 }
2087 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2088 return JNIHandles::make_local(field);
2089 }
2090
2091 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2092 {
2093 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2094 JvmtiVMObjectAllocEventCollector oam;
2095 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2096 bounds_check(cp, index, CHECK_NULL);
2097 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2098 return res;
2099 }
2100 JVM_END
2101
2102 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2103 {
2104 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2105 JvmtiVMObjectAllocEventCollector oam;
2106 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2107 bounds_check(cp, index, CHECK_NULL);
2108 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2109 return res;
2110 }
2111 JVM_END
2112
2113 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2114 {
2115 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2116 JvmtiVMObjectAllocEventCollector oam;
2117 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2118 bounds_check(cp, index, CHECK_NULL);
2119 constantTag tag = cp->tag_at(index);
2120 if (!tag.is_field_or_method()) {
2121 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2122 }
2123 int klass_ref = cp->uncached_klass_ref_index_at(index);
2124 Symbol* klass_name = cp->klass_name_at(klass_ref);
2125 Symbol* member_name = cp->uncached_name_ref_at(index);
2126 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2127 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2128 objArrayHandle dest(THREAD, dest_o);
2129 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2130 dest->obj_at_put(0, str());
2131 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2132 dest->obj_at_put(1, str());
2133 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2134 dest->obj_at_put(2, str());
2135 return (jobjectArray) JNIHandles::make_local(dest());
2136 }
2137 JVM_END
2138
2139 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2140 {
2141 JVMWrapper("JVM_ConstantPoolGetIntAt");
2142 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_0);
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_int()) {
2146 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 return cp->int_at(index);
2149 }
2150 JVM_END
2151
2152 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2153 {
2154 JVMWrapper("JVM_ConstantPoolGetLongAt");
2155 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2156 bounds_check(cp, index, CHECK_(0L));
2157 constantTag tag = cp->tag_at(index);
2158 if (!tag.is_long()) {
2159 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2160 }
2161 return cp->long_at(index);
2162 }
2163 JVM_END
2164
2165 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2166 {
2167 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2168 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2169 bounds_check(cp, index, CHECK_(0.0f));
2170 constantTag tag = cp->tag_at(index);
2171 if (!tag.is_float()) {
2172 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2173 }
2174 return cp->float_at(index);
2175 }
2176 JVM_END
2177
2178 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2179 {
2180 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2181 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2182 bounds_check(cp, index, CHECK_(0.0));
2183 constantTag tag = cp->tag_at(index);
2184 if (!tag.is_double()) {
2185 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2186 }
2187 return cp->double_at(index);
2188 }
2189 JVM_END
2190
2191 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2192 {
2193 JVMWrapper("JVM_ConstantPoolGetStringAt");
2194 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2195 bounds_check(cp, index, CHECK_NULL);
2196 constantTag tag = cp->tag_at(index);
2197 if (!tag.is_string()) {
2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2199 }
2200 oop str = cp->string_at(index, CHECK_NULL);
2201 return (jstring) JNIHandles::make_local(str);
2202 }
2203 JVM_END
2204
2205 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2206 {
2207 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2208 JvmtiVMObjectAllocEventCollector oam;
2209 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2210 bounds_check(cp, index, CHECK_NULL);
2211 constantTag tag = cp->tag_at(index);
2212 if (!tag.is_symbol()) {
2213 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2214 }
2215 Symbol* sym = cp->symbol_at(index);
2216 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2217 return (jstring) JNIHandles::make_local(str());
2218 }
2219 JVM_END
2220
2221
2222 // Assertion support. //////////////////////////////////////////////////////////
2223
2224 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2225 JVMWrapper("JVM_DesiredAssertionStatus");
2226 assert(cls != NULL, "bad class");
2227
2228 oop r = JNIHandles::resolve(cls);
2229 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2230 if (java_lang_Class::is_primitive(r)) return false;
2231
2232 Klass* k = java_lang_Class::as_Klass(r);
2233 assert(k->oop_is_instance(), "must be an instance klass");
2234 if (! k->oop_is_instance()) return false;
2235
2236 ResourceMark rm(THREAD);
2237 const char* name = k->name()->as_C_string();
2238 bool system_class = k->class_loader() == NULL;
2239 return JavaAssertions::enabled(name, system_class);
2240
2241 JVM_END
2242
2243
2244 // Return a new AssertionStatusDirectives object with the fields filled in with
2245 // command-line assertion arguments (i.e., -ea, -da).
2246 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2247 JVMWrapper("JVM_AssertionStatusDirectives");
2248 JvmtiVMObjectAllocEventCollector oam;
2249 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2250 return JNIHandles::make_local(env, asd);
2251 JVM_END
2252
2253 // Verification ////////////////////////////////////////////////////////////////////////////////
2254
2255 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2256
2257 // RedefineClasses support: bug 6214132 caused verification to fail.
2258 // All functions from this section should call the jvmtiThreadSate function:
2259 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2260 // The function returns a Klass* of the _scratch_class if the verifier
2261 // was invoked in the middle of the class redefinition.
2262 // Otherwise it returns its argument value which is the _the_class Klass*.
2263 // Please, refer to the description in the jvmtiThreadSate.hpp.
2264
2265 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2266 JVMWrapper("JVM_GetClassNameUTF");
2267 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2268 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2269 return k->name()->as_utf8();
2270 JVM_END
2271
2272
2273 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2274 JVMWrapper("JVM_GetClassCPTypes");
2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2276 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2277 // types will have length zero if this is not an InstanceKlass
2278 // (length is determined by call to JVM_GetClassCPEntriesCount)
2279 if (k->oop_is_instance()) {
2280 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2281 for (int index = cp->length() - 1; index >= 0; index--) {
2282 constantTag tag = cp->tag_at(index);
2283 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2284 }
2285 }
2286 JVM_END
2287
2288
2289 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2290 JVMWrapper("JVM_GetClassCPEntriesCount");
2291 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2293 if (!k->oop_is_instance())
2294 return 0;
2295 return InstanceKlass::cast(k)->constants()->length();
2296 JVM_END
2297
2298
2299 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2300 JVMWrapper("JVM_GetClassFieldsCount");
2301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2302 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2303 if (!k->oop_is_instance())
2304 return 0;
2305 return InstanceKlass::cast(k)->java_fields_count();
2306 JVM_END
2307
2308
2309 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2310 JVMWrapper("JVM_GetClassMethodsCount");
2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 if (!k->oop_is_instance())
2314 return 0;
2315 return InstanceKlass::cast(k)->methods()->length();
2316 JVM_END
2317
2318
2319 // The following methods, used for the verifier, are never called with
2320 // array klasses, so a direct cast to InstanceKlass is safe.
2321 // Typically, these methods are called in a loop with bounds determined
2322 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2323 // zero for arrays.
2324 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2325 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2326 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2327 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2328 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2329 int length = method->checked_exceptions_length();
2330 if (length > 0) {
2331 CheckedExceptionElement* table= method->checked_exceptions_start();
2332 for (int i = 0; i < length; i++) {
2333 exceptions[i] = table[i].class_cp_index;
2334 }
2335 }
2336 JVM_END
2337
2338
2339 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2340 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2341 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2342 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2343 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2344 return method->checked_exceptions_length();
2345 JVM_END
2346
2347
2348 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2349 JVMWrapper("JVM_GetMethodIxByteCode");
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2353 memcpy(code, method->code_base(), method->code_size());
2354 JVM_END
2355
2356
2357 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2358 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2359 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2361 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2362 return method->code_size();
2363 JVM_END
2364
2365
2366 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2367 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2370 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2371 ExceptionTable extable(method);
2372 entry->start_pc = extable.start_pc(entry_index);
2373 entry->end_pc = extable.end_pc(entry_index);
2374 entry->handler_pc = extable.handler_pc(entry_index);
2375 entry->catchType = extable.catch_type_index(entry_index);
2376 JVM_END
2377
2378
2379 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2380 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2381 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2382 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2383 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2384 return method->exception_table_length();
2385 JVM_END
2386
2387
2388 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2389 JVMWrapper("JVM_GetMethodIxModifiers");
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2394 JVM_END
2395
2396
2397 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2398 JVMWrapper("JVM_GetFieldIxModifiers");
2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2401 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2402 JVM_END
2403
2404
2405 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2406 JVMWrapper("JVM_GetMethodIxLocalsCount");
2407 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2408 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2409 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2410 return method->max_locals();
2411 JVM_END
2412
2413
2414 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2415 JVMWrapper("JVM_GetMethodIxArgsSize");
2416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2417 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2419 return method->size_of_parameters();
2420 JVM_END
2421
2422
2423 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2424 JVMWrapper("JVM_GetMethodIxMaxStack");
2425 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2426 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2427 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2428 return method->verifier_max_stack();
2429 JVM_END
2430
2431
2432 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2433 JVMWrapper("JVM_IsConstructorIx");
2434 ResourceMark rm(THREAD);
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2438 return method->name() == vmSymbols::object_initializer_name();
2439 JVM_END
2440
2441
2442 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2443 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2444 ResourceMark rm(THREAD);
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->is_overpass();
2449 JVM_END
2450
2451 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2452 JVMWrapper("JVM_GetMethodIxIxUTF");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2456 return method->name()->as_utf8();
2457 JVM_END
2458
2459
2460 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2461 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2462 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2465 return method->signature()->as_utf8();
2466 JVM_END
2467
2468 /**
2469 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2470 * read entries in the constant pool. Since the old verifier always
2471 * works on a copy of the code, it will not see any rewriting that
2472 * may possibly occur in the middle of verification. So it is important
2473 * that nothing it calls tries to use the cpCache instead of the raw
2474 * constant pool, so we must use cp->uncached_x methods when appropriate.
2475 */
2476 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2477 JVMWrapper("JVM_GetCPFieldNameUTF");
2478 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2480 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2481 switch (cp->tag_at(cp_index).value()) {
2482 case JVM_CONSTANT_Fieldref:
2483 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2484 default:
2485 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2486 }
2487 ShouldNotReachHere();
2488 return NULL;
2489 JVM_END
2490
2491
2492 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2493 JVMWrapper("JVM_GetCPMethodNameUTF");
2494 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2495 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2496 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2497 switch (cp->tag_at(cp_index).value()) {
2498 case JVM_CONSTANT_InterfaceMethodref:
2499 case JVM_CONSTANT_Methodref:
2500 case JVM_CONSTANT_NameAndType: // for invokedynamic
2501 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2502 default:
2503 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2504 }
2505 ShouldNotReachHere();
2506 return NULL;
2507 JVM_END
2508
2509
2510 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2511 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2512 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2513 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2514 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2515 switch (cp->tag_at(cp_index).value()) {
2516 case JVM_CONSTANT_InterfaceMethodref:
2517 case JVM_CONSTANT_Methodref:
2518 case JVM_CONSTANT_NameAndType: // for invokedynamic
2519 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2520 default:
2521 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2522 }
2523 ShouldNotReachHere();
2524 return NULL;
2525 JVM_END
2526
2527
2528 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2529 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2533 switch (cp->tag_at(cp_index).value()) {
2534 case JVM_CONSTANT_Fieldref:
2535 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2536 default:
2537 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2538 }
2539 ShouldNotReachHere();
2540 return NULL;
2541 JVM_END
2542
2543
2544 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2545 JVMWrapper("JVM_GetCPClassNameUTF");
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2548 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2549 Symbol* classname = cp->klass_name_at(cp_index);
2550 return classname->as_utf8();
2551 JVM_END
2552
2553
2554 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2555 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2556 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2557 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2558 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2559 switch (cp->tag_at(cp_index).value()) {
2560 case JVM_CONSTANT_Fieldref: {
2561 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2562 Symbol* classname = cp->klass_name_at(class_index);
2563 return classname->as_utf8();
2564 }
2565 default:
2566 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2567 }
2568 ShouldNotReachHere();
2569 return NULL;
2570 JVM_END
2571
2572
2573 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2574 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 switch (cp->tag_at(cp_index).value()) {
2579 case JVM_CONSTANT_Methodref:
2580 case JVM_CONSTANT_InterfaceMethodref: {
2581 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2582 Symbol* classname = cp->klass_name_at(class_index);
2583 return classname->as_utf8();
2584 }
2585 default:
2586 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2587 }
2588 ShouldNotReachHere();
2589 return NULL;
2590 JVM_END
2591
2592
2593 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2594 JVMWrapper("JVM_GetCPFieldModifiers");
2595 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2596 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2597 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2598 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2599 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2600 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2601 switch (cp->tag_at(cp_index).value()) {
2602 case JVM_CONSTANT_Fieldref: {
2603 Symbol* name = cp->uncached_name_ref_at(cp_index);
2604 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2605 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2606 if (fs.name() == name && fs.signature() == signature) {
2607 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2608 }
2609 }
2610 return -1;
2611 }
2612 default:
2613 fatal("JVM_GetCPFieldModifiers: illegal constant");
2614 }
2615 ShouldNotReachHere();
2616 return 0;
2617 JVM_END
2618
2619
2620 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2621 JVMWrapper("JVM_GetCPMethodModifiers");
2622 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2623 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2624 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2625 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2626 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2627 switch (cp->tag_at(cp_index).value()) {
2628 case JVM_CONSTANT_Methodref:
2629 case JVM_CONSTANT_InterfaceMethodref: {
2630 Symbol* name = cp->uncached_name_ref_at(cp_index);
2631 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2632 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2633 int methods_count = methods->length();
2634 for (int i = 0; i < methods_count; i++) {
2635 Method* method = methods->at(i);
2636 if (method->name() == name && method->signature() == signature) {
2637 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2638 }
2639 }
2640 return -1;
2641 }
2642 default:
2643 fatal("JVM_GetCPMethodModifiers: illegal constant");
2644 }
2645 ShouldNotReachHere();
2646 return 0;
2647 JVM_END
2648
2649
2650 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2651
2652 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2653 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2654 JVM_END
2655
2656
2657 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2658 JVMWrapper("JVM_IsSameClassPackage");
2659 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2660 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2661 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2662 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2663 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2664 JVM_END
2665
2666
2667 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2668
2669 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2670 JVMWrapper2("JVM_Open (%s)", fname);
2671
2672 //%note jvm_r6
2673 int result = os::open(fname, flags, mode);
2674 if (result >= 0) {
2675 return result;
2676 } else {
2677 switch(errno) {
2678 case EEXIST:
2679 return JVM_EEXIST;
2680 default:
2681 return -1;
2682 }
2683 }
2684 JVM_END
2685
2686
2687 JVM_LEAF(jint, JVM_Close(jint fd))
2688 JVMWrapper2("JVM_Close (0x%x)", fd);
2689 //%note jvm_r6
2690 return os::close(fd);
2691 JVM_END
2692
2693
2694 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2695 JVMWrapper2("JVM_Read (0x%x)", fd);
2696
2697 //%note jvm_r6
2698 return (jint)os::restartable_read(fd, buf, nbytes);
2699 JVM_END
2700
2701
2702 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2703 JVMWrapper2("JVM_Write (0x%x)", fd);
2704
2705 //%note jvm_r6
2706 return (jint)os::write(fd, buf, nbytes);
2707 JVM_END
2708
2709
2710 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2711 JVMWrapper2("JVM_Available (0x%x)", fd);
2712 //%note jvm_r6
2713 return os::available(fd, pbytes);
2714 JVM_END
2715
2716
2717 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2718 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2719 //%note jvm_r6
2720 return os::lseek(fd, offset, whence);
2721 JVM_END
2722
2723
2724 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2725 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2726 return os::ftruncate(fd, length);
2727 JVM_END
2728
2729
2730 JVM_LEAF(jint, JVM_Sync(jint fd))
2731 JVMWrapper2("JVM_Sync (0x%x)", fd);
2732 //%note jvm_r6
2733 return os::fsync(fd);
2734 JVM_END
2735
2736
2737 // Printing support //////////////////////////////////////////////////
2738 extern "C" {
2739
2740 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2741 // see bug 4399518, 4417214
2742 if ((intptr_t)count <= 0) return -1;
2743 return vsnprintf(str, count, fmt, args);
2744 }
2745
2746
2747 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2748 va_list args;
2749 int len;
2750 va_start(args, fmt);
2751 len = jio_vsnprintf(str, count, fmt, args);
2752 va_end(args);
2753 return len;
2754 }
2755
2756
2757 int jio_fprintf(FILE* f, const char *fmt, ...) {
2758 int len;
2759 va_list args;
2760 va_start(args, fmt);
2761 len = jio_vfprintf(f, fmt, args);
2762 va_end(args);
2763 return len;
2764 }
2765
2766
2767 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2768 if (Arguments::vfprintf_hook() != NULL) {
2769 return Arguments::vfprintf_hook()(f, fmt, args);
2770 } else {
2771 return vfprintf(f, fmt, args);
2772 }
2773 }
2774
2775
2776 JNIEXPORT int jio_printf(const char *fmt, ...) {
2777 int len;
2778 va_list args;
2779 va_start(args, fmt);
2780 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2781 va_end(args);
2782 return len;
2783 }
2784
2785
2786 // HotSpot specific jio method
2787 void jio_print(const char* s) {
2788 // Try to make this function as atomic as possible.
2789 if (Arguments::vfprintf_hook() != NULL) {
2790 jio_fprintf(defaultStream::output_stream(), "%s", s);
2791 } else {
2792 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2793 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2794 }
2795 }
2796
2797 } // Extern C
2798
2799 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2800
2801 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2802 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2803 // OSThread objects. The exception to this rule is when the target object is the thread
2804 // doing the operation, in which case we know that the thread won't exit until the
2805 // operation is done (all exits being voluntary). There are a few cases where it is
2806 // rather silly to do operations on yourself, like resuming yourself or asking whether
2807 // you are alive. While these can still happen, they are not subject to deadlocks if
2808 // the lock is held while the operation occurs (this is not the case for suspend, for
2809 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2810 // implementation is local to this file, we always lock Threads_lock for that one.
2811
2812 static void thread_entry(JavaThread* thread, TRAPS) {
2813 HandleMark hm(THREAD);
2814 Handle obj(THREAD, thread->threadObj());
2815 JavaValue result(T_VOID);
2816 JavaCalls::call_virtual(&result,
2817 obj,
2818 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2819 vmSymbols::run_method_name(),
2820 vmSymbols::void_method_signature(),
2821 THREAD);
2822 }
2823
2824
2825 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2826 JVMWrapper("JVM_StartThread");
2827 JavaThread *native_thread = NULL;
2828
2829 // We cannot hold the Threads_lock when we throw an exception,
2830 // due to rank ordering issues. Example: we might need to grab the
2831 // Heap_lock while we construct the exception.
2832 bool throw_illegal_thread_state = false;
2833
2834 // We must release the Threads_lock before we can post a jvmti event
2835 // in Thread::start.
2836 {
2837 // Ensure that the C++ Thread and OSThread structures aren't freed before
2838 // we operate.
2839 MutexLocker mu(Threads_lock);
2840
2841 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2842 // re-starting an already started thread, so we should usually find
2843 // that the JavaThread is null. However for a JNI attached thread
2844 // there is a small window between the Thread object being created
2845 // (with its JavaThread set) and the update to its threadStatus, so we
2846 // have to check for this
2847 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2848 throw_illegal_thread_state = true;
2849 } else {
2850 // We could also check the stillborn flag to see if this thread was already stopped, but
2851 // for historical reasons we let the thread detect that itself when it starts running
2852
2853 jlong size =
2854 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2855 // Allocate the C++ Thread structure and create the native thread. The
2856 // stack size retrieved from java is signed, but the constructor takes
2857 // size_t (an unsigned type), so avoid passing negative values which would
2858 // result in really large stacks.
2859 size_t sz = size > 0 ? (size_t) size : 0;
2860 native_thread = new JavaThread(&thread_entry, sz);
2861
2862 // At this point it may be possible that no osthread was created for the
2863 // JavaThread due to lack of memory. Check for this situation and throw
2864 // an exception if necessary. Eventually we may want to change this so
2865 // that we only grab the lock if the thread was created successfully -
2866 // then we can also do this check and throw the exception in the
2867 // JavaThread constructor.
2868 if (native_thread->osthread() != NULL) {
2869 // Note: the current thread is not being used within "prepare".
2870 native_thread->prepare(jthread);
2871 }
2872 }
2873 }
2874
2875 if (throw_illegal_thread_state) {
2876 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2877 }
2878
2879 assert(native_thread != NULL, "Starting null thread?");
2880
2881 if (native_thread->osthread() == NULL) {
2882 // No one should hold a reference to the 'native_thread'.
2883 delete native_thread;
2884 if (JvmtiExport::should_post_resource_exhausted()) {
2885 JvmtiExport::post_resource_exhausted(
2886 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2887 "unable to create new native thread");
2888 }
2889 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2890 "unable to create new native thread");
2891 }
2892
2893 Thread::start(native_thread);
2894
2895 JVM_END
2896
2897 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2898 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2899 // but is thought to be reliable and simple. In the case, where the receiver is the
2900 // same thread as the sender, no safepoint is needed.
2901 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2902 JVMWrapper("JVM_StopThread");
2903
2904 oop java_throwable = JNIHandles::resolve(throwable);
2905 if (java_throwable == NULL) {
2906 THROW(vmSymbols::java_lang_NullPointerException());
2907 }
2908 oop java_thread = JNIHandles::resolve_non_null(jthread);
2909 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2910 Events::log_exception(JavaThread::current(),
2911 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2912 receiver, (address)java_thread, throwable);
2913 // First check if thread is alive
2914 if (receiver != NULL) {
2915 // Check if exception is getting thrown at self (use oop equality, since the
2916 // target object might exit)
2917 if (java_thread == thread->threadObj()) {
2918 THROW_OOP(java_throwable);
2919 } else {
2920 // Enques a VM_Operation to stop all threads and then deliver the exception...
2921 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2922 }
2923 }
2924 else {
2925 // Either:
2926 // - target thread has not been started before being stopped, or
2927 // - target thread already terminated
2928 // We could read the threadStatus to determine which case it is
2929 // but that is overkill as it doesn't matter. We must set the
2930 // stillborn flag for the first case, and if the thread has already
2931 // exited setting this flag has no affect
2932 java_lang_Thread::set_stillborn(java_thread);
2933 }
2934 JVM_END
2935
2936
2937 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2938 JVMWrapper("JVM_IsThreadAlive");
2939
2940 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2941 return java_lang_Thread::is_alive(thread_oop);
2942 JVM_END
2943
2944
2945 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2946 JVMWrapper("JVM_SuspendThread");
2947 oop java_thread = JNIHandles::resolve_non_null(jthread);
2948 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2949
2950 if (receiver != NULL) {
2951 // thread has run and has not exited (still on threads list)
2952
2953 {
2954 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2955 if (receiver->is_external_suspend()) {
2956 // Don't allow nested external suspend requests. We can't return
2957 // an error from this interface so just ignore the problem.
2958 return;
2959 }
2960 if (receiver->is_exiting()) { // thread is in the process of exiting
2961 return;
2962 }
2963 receiver->set_external_suspend();
2964 }
2965
2966 // java_suspend() will catch threads in the process of exiting
2967 // and will ignore them.
2968 receiver->java_suspend();
2969
2970 // It would be nice to have the following assertion in all the
2971 // time, but it is possible for a racing resume request to have
2972 // resumed this thread right after we suspended it. Temporarily
2973 // enable this assertion if you are chasing a different kind of
2974 // bug.
2975 //
2976 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2977 // receiver->is_being_ext_suspended(), "thread is not suspended");
2978 }
2979 JVM_END
2980
2981
2982 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2983 JVMWrapper("JVM_ResumeThread");
2984 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2985 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2986 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2987 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2988 // looks at it.
2989 MutexLocker ml(Threads_lock);
2990 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2991 if (thr != NULL) {
2992 // the thread has run and is not in the process of exiting
2993 thr->java_resume();
2994 }
2995 JVM_END
2996
2997
2998 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2999 JVMWrapper("JVM_SetThreadPriority");
3000 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3001 MutexLocker ml(Threads_lock);
3002 oop java_thread = JNIHandles::resolve_non_null(jthread);
3003 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3004 JavaThread* thr = java_lang_Thread::thread(java_thread);
3005 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3006 Thread::set_priority(thr, (ThreadPriority)prio);
3007 }
3008 JVM_END
3009
3010
3011 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3012 JVMWrapper("JVM_Yield");
3013 if (os::dont_yield()) return;
3014 #ifndef USDT2
3015 HS_DTRACE_PROBE0(hotspot, thread__yield);
3016 #else /* USDT2 */
3017 HOTSPOT_THREAD_YIELD();
3018 #endif /* USDT2 */
3019 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3020 // Critical for similar threading behaviour
3021 if (ConvertYieldToSleep) {
3022 os::sleep(thread, MinSleepInterval, false);
3023 } else {
3024 os::yield();
3025 }
3026 JVM_END
3027
3028
3029 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3030 JVMWrapper("JVM_Sleep");
3031
3032 if (millis < 0) {
3033 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3034 }
3035
3036 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3037 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3038 }
3039
3040 // Save current thread state and restore it at the end of this block.
3041 // And set new thread state to SLEEPING.
3042 JavaThreadSleepState jtss(thread);
3043
3044 #ifndef USDT2
3045 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3046 #else /* USDT2 */
3047 HOTSPOT_THREAD_SLEEP_BEGIN(
3048 millis);
3049 #endif /* USDT2 */
3050
3051 EventThreadSleep event;
3052
3053 if (millis == 0) {
3054 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3055 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3056 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3057 // for SOLARIS
3058 if (ConvertSleepToYield) {
3059 os::yield();
3060 } else {
3061 ThreadState old_state = thread->osthread()->get_state();
3062 thread->osthread()->set_state(SLEEPING);
3063 os::sleep(thread, MinSleepInterval, false);
3064 thread->osthread()->set_state(old_state);
3065 }
3066 } else {
3067 ThreadState old_state = thread->osthread()->get_state();
3068 thread->osthread()->set_state(SLEEPING);
3069 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3070 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3071 // us while we were sleeping. We do not overwrite those.
3072 if (!HAS_PENDING_EXCEPTION) {
3073 if (event.should_commit()) {
3074 event.set_time(millis);
3075 event.commit();
3076 }
3077 #ifndef USDT2
3078 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3079 #else /* USDT2 */
3080 HOTSPOT_THREAD_SLEEP_END(
3081 1);
3082 #endif /* USDT2 */
3083 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3084 // to properly restore the thread state. That's likely wrong.
3085 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3086 }
3087 }
3088 thread->osthread()->set_state(old_state);
3089 }
3090 if (event.should_commit()) {
3091 event.set_time(millis);
3092 event.commit();
3093 }
3094 #ifndef USDT2
3095 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3096 #else /* USDT2 */
3097 HOTSPOT_THREAD_SLEEP_END(
3098 0);
3099 #endif /* USDT2 */
3100 JVM_END
3101
3102 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3103 JVMWrapper("JVM_CurrentThread");
3104 oop jthread = thread->threadObj();
3105 assert (thread != NULL, "no current thread!");
3106 return JNIHandles::make_local(env, jthread);
3107 JVM_END
3108
3109
3110 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3111 JVMWrapper("JVM_CountStackFrames");
3112
3113 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3114 oop java_thread = JNIHandles::resolve_non_null(jthread);
3115 bool throw_illegal_thread_state = false;
3116 int count = 0;
3117
3118 {
3119 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3120 // We need to re-resolve the java_thread, since a GC might have happened during the
3121 // acquire of the lock
3122 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3123
3124 if (thr == NULL) {
3125 // do nothing
3126 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3127 // Check whether this java thread has been suspended already. If not, throws
3128 // IllegalThreadStateException. We defer to throw that exception until
3129 // Threads_lock is released since loading exception class has to leave VM.
3130 // The correct way to test a thread is actually suspended is
3131 // wait_for_ext_suspend_completion(), but we can't call that while holding
3132 // the Threads_lock. The above tests are sufficient for our purposes
3133 // provided the walkability of the stack is stable - which it isn't
3134 // 100% but close enough for most practical purposes.
3135 throw_illegal_thread_state = true;
3136 } else {
3137 // Count all java activation, i.e., number of vframes
3138 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3139 // Native frames are not counted
3140 if (!vfst.method()->is_native()) count++;
3141 }
3142 }
3143 }
3144
3145 if (throw_illegal_thread_state) {
3146 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3147 "this thread is not suspended");
3148 }
3149 return count;
3150 JVM_END
3151
3152 // Consider: A better way to implement JVM_Interrupt() is to acquire
3153 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3154 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3155 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3156 // outside the critical section. Threads_lock is hot so we want to minimize
3157 // the hold-time. A cleaner interface would be to decompose interrupt into
3158 // two steps. The 1st phase, performed under Threads_lock, would return
3159 // a closure that'd be invoked after Threads_lock was dropped.
3160 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3161 // admit spurious wakeups.
3162
3163 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3164 JVMWrapper("JVM_Interrupt");
3165
3166 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3167 oop java_thread = JNIHandles::resolve_non_null(jthread);
3168 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3169 // We need to re-resolve the java_thread, since a GC might have happened during the
3170 // acquire of the lock
3171 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3172 if (thr != NULL) {
3173 Thread::interrupt(thr);
3174 }
3175 JVM_END
3176
3177
3178 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3179 JVMWrapper("JVM_IsInterrupted");
3180
3181 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3182 oop java_thread = JNIHandles::resolve_non_null(jthread);
3183 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3184 // We need to re-resolve the java_thread, since a GC might have happened during the
3185 // acquire of the lock
3186 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3187 if (thr == NULL) {
3188 return JNI_FALSE;
3189 } else {
3190 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3191 }
3192 JVM_END
3193
3194
3195 // Return true iff the current thread has locked the object passed in
3196
3197 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3198 JVMWrapper("JVM_HoldsLock");
3199 assert(THREAD->is_Java_thread(), "sanity check");
3200 if (obj == NULL) {
3201 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3202 }
3203 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3204 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3205 JVM_END
3206
3207
3208 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3209 JVMWrapper("JVM_DumpAllStacks");
3210 VM_PrintThreads op;
3211 VMThread::execute(&op);
3212 if (JvmtiExport::should_post_data_dump()) {
3213 JvmtiExport::post_data_dump();
3214 }
3215 JVM_END
3216
3217 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3218 JVMWrapper("JVM_SetNativeThreadName");
3219 ResourceMark rm(THREAD);
3220 oop java_thread = JNIHandles::resolve_non_null(jthread);
3221 JavaThread* thr = java_lang_Thread::thread(java_thread);
3222 // Thread naming only supported for the current thread, doesn't work for
3223 // target threads.
3224 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3225 // we don't set the name of an attached thread to avoid stepping
3226 // on other programs
3227 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3228 os::set_native_thread_name(thread_name);
3229 }
3230 JVM_END
3231
3232 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3233
3234 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3235 assert(jthread->is_Java_thread(), "must be a Java thread");
3236 if (jthread->privileged_stack_top() == NULL) return false;
3237 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3238 oop loader = jthread->privileged_stack_top()->class_loader();
3239 if (loader == NULL) return true;
3240 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3241 if (trusted) return true;
3242 }
3243 return false;
3244 }
3245
3246 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3247 JVMWrapper("JVM_CurrentLoadedClass");
3248 ResourceMark rm(THREAD);
3249
3250 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3251 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3252 bool trusted = is_trusted_frame(thread, &vfst);
3253 if (trusted) return NULL;
3254
3255 Method* m = vfst.method();
3256 if (!m->is_native()) {
3257 InstanceKlass* holder = m->method_holder();
3258 oop loader = holder->class_loader();
3259 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3260 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3261 }
3262 }
3263 }
3264 return NULL;
3265 JVM_END
3266
3267
3268 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3269 JVMWrapper("JVM_CurrentClassLoader");
3270 ResourceMark rm(THREAD);
3271
3272 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3273
3274 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3275 bool trusted = is_trusted_frame(thread, &vfst);
3276 if (trusted) return NULL;
3277
3278 Method* m = vfst.method();
3279 if (!m->is_native()) {
3280 InstanceKlass* holder = m->method_holder();
3281 assert(holder->is_klass(), "just checking");
3282 oop loader = holder->class_loader();
3283 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3284 return JNIHandles::make_local(env, loader);
3285 }
3286 }
3287 }
3288 return NULL;
3289 JVM_END
3290
3291
3292 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3293 JVMWrapper("JVM_GetClassContext");
3294 ResourceMark rm(THREAD);
3295 JvmtiVMObjectAllocEventCollector oam;
3296 vframeStream vfst(thread);
3297
3298 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3299 // This must only be called from SecurityManager.getClassContext
3300 Method* m = vfst.method();
3301 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3302 m->name() == vmSymbols::getClassContext_name() &&
3303 m->signature() == vmSymbols::void_class_array_signature())) {
3304 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3305 }
3306 }
3307
3308 // Collect method holders
3309 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3310 for (; !vfst.at_end(); vfst.security_next()) {
3311 Method* m = vfst.method();
3312 // Native frames are not returned
3313 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3314 Klass* holder = m->method_holder();
3315 assert(holder->is_klass(), "just checking");
3316 klass_array->append(holder);
3317 }
3318 }
3319
3320 // Create result array of type [Ljava/lang/Class;
3321 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3322 // Fill in mirrors corresponding to method holders
3323 for (int i = 0; i < klass_array->length(); i++) {
3324 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3325 }
3326
3327 return (jobjectArray) JNIHandles::make_local(env, result);
3328 JVM_END
3329
3330
3331 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3332 JVMWrapper("JVM_ClassDepth");
3333 ResourceMark rm(THREAD);
3334 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3335 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3336
3337 const char* str = java_lang_String::as_utf8_string(class_name_str());
3338 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3339 if (class_name_sym == NULL) {
3340 return -1;
3341 }
3342
3343 int depth = 0;
3344
3345 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3346 if (!vfst.method()->is_native()) {
3347 InstanceKlass* holder = vfst.method()->method_holder();
3348 assert(holder->is_klass(), "just checking");
3349 if (holder->name() == class_name_sym) {
3350 return depth;
3351 }
3352 depth++;
3353 }
3354 }
3355 return -1;
3356 JVM_END
3357
3358
3359 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3360 JVMWrapper("JVM_ClassLoaderDepth");
3361 ResourceMark rm(THREAD);
3362 int depth = 0;
3363 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3364 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3365 bool trusted = is_trusted_frame(thread, &vfst);
3366 if (trusted) return -1;
3367
3368 Method* m = vfst.method();
3369 if (!m->is_native()) {
3370 InstanceKlass* holder = m->method_holder();
3371 assert(holder->is_klass(), "just checking");
3372 oop loader = holder->class_loader();
3373 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3374 return depth;
3375 }
3376 depth++;
3377 }
3378 }
3379 return -1;
3380 JVM_END
3381
3382
3383 // java.lang.Package ////////////////////////////////////////////////////////////////
3384
3385
3386 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3387 JVMWrapper("JVM_GetSystemPackage");
3388 ResourceMark rm(THREAD);
3389 JvmtiVMObjectAllocEventCollector oam;
3390 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3391 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3392 return (jstring) JNIHandles::make_local(result);
3393 JVM_END
3394
3395
3396 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3397 JVMWrapper("JVM_GetSystemPackages");
3398 JvmtiVMObjectAllocEventCollector oam;
3399 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3400 return (jobjectArray) JNIHandles::make_local(result);
3401 JVM_END
3402
3403
3404 // ObjectInputStream ///////////////////////////////////////////////////////////////
3405
3406 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3407 if (current_class == NULL) {
3408 return true;
3409 }
3410 if ((current_class == field_class) || access.is_public()) {
3411 return true;
3412 }
3413
3414 if (access.is_protected()) {
3415 // See if current_class is a subclass of field_class
3416 if (current_class->is_subclass_of(field_class)) {
3417 return true;
3418 }
3419 }
3420
3421 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3422 }
3423
3424
3425 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3426 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3427 JVMWrapper("JVM_AllocateNewObject");
3428 JvmtiVMObjectAllocEventCollector oam;
3429 // Receiver is not used
3430 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3431 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3432
3433 // Cannot instantiate primitive types
3434 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3435 ResourceMark rm(THREAD);
3436 THROW_0(vmSymbols::java_lang_InvalidClassException());
3437 }
3438
3439 // Arrays not allowed here, must use JVM_AllocateNewArray
3440 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3441 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3442 ResourceMark rm(THREAD);
3443 THROW_0(vmSymbols::java_lang_InvalidClassException());
3444 }
3445
3446 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3447 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3448
3449 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3450
3451 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3452 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3453
3454 // Make sure klass is initialized, since we are about to instantiate one of them.
3455 curr_klass->initialize(CHECK_NULL);
3456
3457 methodHandle m (THREAD,
3458 init_klass->find_method(vmSymbols::object_initializer_name(),
3459 vmSymbols::void_method_signature()));
3460 if (m.is_null()) {
3461 ResourceMark rm(THREAD);
3462 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3463 Method::name_and_sig_as_C_string(init_klass(),
3464 vmSymbols::object_initializer_name(),
3465 vmSymbols::void_method_signature()));
3466 }
3467
3468 if (curr_klass == init_klass && !m->is_public()) {
3469 // Calling the constructor for class 'curr_klass'.
3470 // Only allow calls to a public no-arg constructor.
3471 // This path corresponds to creating an Externalizable object.
3472 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3473 }
3474
3475 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3476 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3477 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3478 }
3479
3480 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3481 // Call constructor m. This might call a constructor higher up in the hierachy
3482 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3483
3484 return JNIHandles::make_local(obj());
3485 JVM_END
3486
3487
3488 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3489 JVMWrapper("JVM_AllocateNewArray");
3490 JvmtiVMObjectAllocEventCollector oam;
3491 oop mirror = JNIHandles::resolve_non_null(currClass);
3492
3493 if (java_lang_Class::is_primitive(mirror)) {
3494 THROW_0(vmSymbols::java_lang_InvalidClassException());
3495 }
3496 Klass* k = java_lang_Class::as_Klass(mirror);
3497 oop result;
3498
3499 if (k->oop_is_typeArray()) {
3500 // typeArray
3501 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3502 } else if (k->oop_is_objArray()) {
3503 // objArray
3504 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3505 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3506 result = oak->allocate(length, CHECK_NULL);
3507 } else {
3508 THROW_0(vmSymbols::java_lang_InvalidClassException());
3509 }
3510 return JNIHandles::make_local(env, result);
3511 JVM_END
3512
3513
3514 // Return the first non-null class loader up the execution stack, or null
3515 // if only code from the null class loader is on the stack.
3516
3517 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3518 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3519 // UseNewReflection
3520 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3521 oop loader = vfst.method()->method_holder()->class_loader();
3522 if (loader != NULL) {
3523 return JNIHandles::make_local(env, loader);
3524 }
3525 }
3526 return NULL;
3527 JVM_END
3528
3529
3530 // Load a class relative to the most recent class on the stack with a non-null
3531 // classloader.
3532 // This function has been deprecated and should not be considered part of the
3533 // specified JVM interface.
3534
3535 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3536 jclass currClass, jstring currClassName))
3537 JVMWrapper("JVM_LoadClass0");
3538 // Receiver is not used
3539 ResourceMark rm(THREAD);
3540
3541 // Class name argument is not guaranteed to be in internal format
3542 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3543 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3544
3545 const char* str = java_lang_String::as_utf8_string(string());
3546
3547 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3548 // It's impossible to create this class; the name cannot fit
3549 // into the constant pool.
3550 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3551 }
3552
3553 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3554 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3555 // Find the most recent class on the stack with a non-null classloader
3556 oop loader = NULL;
3557 oop protection_domain = NULL;
3558 if (curr_klass.is_null()) {
3559 for (vframeStream vfst(thread);
3560 !vfst.at_end() && loader == NULL;
3561 vfst.next()) {
3562 if (!vfst.method()->is_native()) {
3563 InstanceKlass* holder = vfst.method()->method_holder();
3564 loader = holder->class_loader();
3565 protection_domain = holder->protection_domain();
3566 }
3567 }
3568 } else {
3569 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3570 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3571 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3572 }
3573 Handle h_loader(THREAD, loader);
3574 Handle h_prot (THREAD, protection_domain);
3575 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3576 false, thread);
3577 if (TraceClassResolution && result != NULL) {
3578 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3579 }
3580 return result;
3581 JVM_END
3582
3583
3584 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3585
3586
3587 // resolve array handle and check arguments
3588 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3589 if (arr == NULL) {
3590 THROW_0(vmSymbols::java_lang_NullPointerException());
3591 }
3592 oop a = JNIHandles::resolve_non_null(arr);
3593 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3594 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3595 }
3596 return arrayOop(a);
3597 }
3598
3599
3600 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3601 JVMWrapper("JVM_GetArrayLength");
3602 arrayOop a = check_array(env, arr, false, CHECK_0);
3603 return a->length();
3604 JVM_END
3605
3606
3607 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3608 JVMWrapper("JVM_Array_Get");
3609 JvmtiVMObjectAllocEventCollector oam;
3610 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3611 jvalue value;
3612 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3613 oop box = Reflection::box(&value, type, CHECK_NULL);
3614 return JNIHandles::make_local(env, box);
3615 JVM_END
3616
3617
3618 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3619 JVMWrapper("JVM_GetPrimitiveArrayElement");
3620 jvalue value;
3621 value.i = 0; // to initialize value before getting used in CHECK
3622 arrayOop a = check_array(env, arr, true, CHECK_(value));
3623 assert(a->is_typeArray(), "just checking");
3624 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3625 BasicType wide_type = (BasicType) wCode;
3626 if (type != wide_type) {
3627 Reflection::widen(&value, type, wide_type, CHECK_(value));
3628 }
3629 return value;
3630 JVM_END
3631
3632
3633 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3634 JVMWrapper("JVM_SetArrayElement");
3635 arrayOop a = check_array(env, arr, false, CHECK);
3636 oop box = JNIHandles::resolve(val);
3637 jvalue value;
3638 value.i = 0; // to initialize value before getting used in CHECK
3639 BasicType value_type;
3640 if (a->is_objArray()) {
3641 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3642 value_type = Reflection::unbox_for_regular_object(box, &value);
3643 } else {
3644 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3645 }
3646 Reflection::array_set(&value, a, index, value_type, CHECK);
3647 JVM_END
3648
3649
3650 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3651 JVMWrapper("JVM_SetPrimitiveArrayElement");
3652 arrayOop a = check_array(env, arr, true, CHECK);
3653 assert(a->is_typeArray(), "just checking");
3654 BasicType value_type = (BasicType) vCode;
3655 Reflection::array_set(&v, a, index, value_type, CHECK);
3656 JVM_END
3657
3658
3659 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3660 JVMWrapper("JVM_NewArray");
3661 JvmtiVMObjectAllocEventCollector oam;
3662 oop element_mirror = JNIHandles::resolve(eltClass);
3663 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3664 return JNIHandles::make_local(env, result);
3665 JVM_END
3666
3667
3668 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3669 JVMWrapper("JVM_NewMultiArray");
3670 JvmtiVMObjectAllocEventCollector oam;
3671 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3672 oop element_mirror = JNIHandles::resolve(eltClass);
3673 assert(dim_array->is_typeArray(), "just checking");
3674 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3675 return JNIHandles::make_local(env, result);
3676 JVM_END
3677
3678
3679 // Networking library support ////////////////////////////////////////////////////////////////////
3680
3681 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3682 JVMWrapper("JVM_InitializeSocketLibrary");
3683 return 0;
3684 JVM_END
3685
3686
3687 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3688 JVMWrapper("JVM_Socket");
3689 return os::socket(domain, type, protocol);
3690 JVM_END
3691
3692
3693 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3694 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3695 //%note jvm_r6
3696 return os::socket_close(fd);
3697 JVM_END
3698
3699
3700 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3701 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3702 //%note jvm_r6
3703 return os::socket_shutdown(fd, howto);
3704 JVM_END
3705
3706
3707 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3708 JVMWrapper2("JVM_Recv (0x%x)", fd);
3709 //%note jvm_r6
3710 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3711 JVM_END
3712
3713
3714 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3715 JVMWrapper2("JVM_Send (0x%x)", fd);
3716 //%note jvm_r6
3717 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3718 JVM_END
3719
3720
3721 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3722 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3723 //%note jvm_r6
3724 return os::timeout(fd, timeout);
3725 JVM_END
3726
3727
3728 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3729 JVMWrapper2("JVM_Listen (0x%x)", fd);
3730 //%note jvm_r6
3731 return os::listen(fd, count);
3732 JVM_END
3733
3734
3735 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3736 JVMWrapper2("JVM_Connect (0x%x)", fd);
3737 //%note jvm_r6
3738 return os::connect(fd, him, (socklen_t)len);
3739 JVM_END
3740
3741
3742 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3743 JVMWrapper2("JVM_Bind (0x%x)", fd);
3744 //%note jvm_r6
3745 return os::bind(fd, him, (socklen_t)len);
3746 JVM_END
3747
3748
3749 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3750 JVMWrapper2("JVM_Accept (0x%x)", fd);
3751 //%note jvm_r6
3752 socklen_t socklen = (socklen_t)(*len);
3753 jint result = os::accept(fd, him, &socklen);
3754 *len = (jint)socklen;
3755 return result;
3756 JVM_END
3757
3758
3759 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3760 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3761 //%note jvm_r6
3762 socklen_t socklen = (socklen_t)(*fromlen);
3763 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3764 *fromlen = (int)socklen;
3765 return result;
3766 JVM_END
3767
3768
3769 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3770 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3771 //%note jvm_r6
3772 socklen_t socklen = (socklen_t)(*len);
3773 jint result = os::get_sock_name(fd, him, &socklen);
3774 *len = (int)socklen;
3775 return result;
3776 JVM_END
3777
3778
3779 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3780 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3781 //%note jvm_r6
3782 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3783 JVM_END
3784
3785
3786 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3787 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3788 //%note jvm_r6
3789 return os::socket_available(fd, pbytes);
3790 JVM_END
3791
3792
3793 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3794 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3795 //%note jvm_r6
3796 socklen_t socklen = (socklen_t)(*optlen);
3797 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3798 *optlen = (int)socklen;
3799 return result;
3800 JVM_END
3801
3802
3803 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3804 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3805 //%note jvm_r6
3806 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3807 JVM_END
3808
3809
3810 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3811 JVMWrapper("JVM_GetHostName");
3812 return os::get_host_name(name, namelen);
3813 JVM_END
3814
3815
3816 // Library support ///////////////////////////////////////////////////////////////////////////
3817
3818 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3819 //%note jvm_ct
3820 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3821 char ebuf[1024];
3822 void *load_result;
3823 {
3824 ThreadToNativeFromVM ttnfvm(thread);
3825 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3826 }
3827 if (load_result == NULL) {
3828 char msg[1024];
3829 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3830 // Since 'ebuf' may contain a string encoded using
3831 // platform encoding scheme, we need to pass
3832 // Exceptions::unsafe_to_utf8 to the new_exception method
3833 // as the last argument. See bug 6367357.
3834 Handle h_exception =
3835 Exceptions::new_exception(thread,
3836 vmSymbols::java_lang_UnsatisfiedLinkError(),
3837 msg, Exceptions::unsafe_to_utf8);
3838
3839 THROW_HANDLE_0(h_exception);
3840 }
3841 return load_result;
3842 JVM_END
3843
3844
3845 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3846 JVMWrapper("JVM_UnloadLibrary");
3847 os::dll_unload(handle);
3848 JVM_END
3849
3850
3851 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3852 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3853 return os::dll_lookup(handle, name);
3854 JVM_END
3855
3856
3857 // Floating point support ////////////////////////////////////////////////////////////////////
3858
3859 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3860 JVMWrapper("JVM_IsNaN");
3861 return g_isnan(a);
3862 JVM_END
3863
3864
3865 // JNI version ///////////////////////////////////////////////////////////////////////////////
3866
3867 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3868 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3869 return Threads::is_supported_jni_version_including_1_1(version);
3870 JVM_END
3871
3872
3873 // String support ///////////////////////////////////////////////////////////////////////////
3874
3875 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3876 JVMWrapper("JVM_InternString");
3877 JvmtiVMObjectAllocEventCollector oam;
3878 if (str == NULL) return NULL;
3879 oop string = JNIHandles::resolve_non_null(str);
3880 oop result = StringTable::intern(string, CHECK_NULL);
3881 return (jstring) JNIHandles::make_local(env, result);
3882 JVM_END
3883
3884
3885 // Raw monitor support //////////////////////////////////////////////////////////////////////
3886
3887 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3888 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3889 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3890 // that only works with java threads.
3891
3892
3893 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3894 VM_Exit::block_if_vm_exited();
3895 JVMWrapper("JVM_RawMonitorCreate");
3896 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3897 }
3898
3899
3900 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3901 VM_Exit::block_if_vm_exited();
3902 JVMWrapper("JVM_RawMonitorDestroy");
3903 delete ((Mutex*) mon);
3904 }
3905
3906
3907 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3908 VM_Exit::block_if_vm_exited();
3909 JVMWrapper("JVM_RawMonitorEnter");
3910 ((Mutex*) mon)->jvm_raw_lock();
3911 return 0;
3912 }
3913
3914
3915 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3916 VM_Exit::block_if_vm_exited();
3917 JVMWrapper("JVM_RawMonitorExit");
3918 ((Mutex*) mon)->jvm_raw_unlock();
3919 }
3920
3921
3922 // Support for Serialization
3923
3924 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3925 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3926 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3927 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3928
3929 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3930 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3931 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3932 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3933
3934
3935 void initialize_converter_functions() {
3936 if (JDK_Version::is_gte_jdk14x_version()) {
3937 // These functions only exist for compatibility with 1.3.1 and earlier
3938 return;
3939 }
3940
3941 // called from universe_post_init()
3942 assert(
3943 int_bits_to_float_fn == NULL &&
3944 long_bits_to_double_fn == NULL &&
3945 float_to_int_bits_fn == NULL &&
3946 double_to_long_bits_fn == NULL ,
3947 "initialization done twice"
3948 );
3949 // initialize
3950 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3951 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3952 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3953 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3954 // verify
3955 assert(
3956 int_bits_to_float_fn != NULL &&
3957 long_bits_to_double_fn != NULL &&
3958 float_to_int_bits_fn != NULL &&
3959 double_to_long_bits_fn != NULL ,
3960 "initialization failed"
3961 );
3962 }
3963
3964
3965 // Serialization
3966 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3967 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3968 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3969
3970 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3971 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3972 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3973 oop o = JNIHandles::resolve(obj);
3974
3975 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3976 THROW(vmSymbols::java_lang_NullPointerException());
3977 }
3978
3979 jsize nfids = fids->length();
3980 if (nfids == 0) return;
3981
3982 if (tcodes->length() < nfids) {
3983 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3984 }
3985
3986 jsize off = 0;
3987 /* loop through fields, setting values */
3988 for (jsize i = 0; i < nfids; i++) {
3989 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3990 int field_offset;
3991 if (fid != NULL) {
3992 // NULL is a legal value for fid, but retrieving the field offset
3993 // trigger assertion in that case
3994 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3995 }
3996
3997 switch (tcodes->char_at(i)) {
3998 case 'Z':
3999 if (fid != NULL) {
4000 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
4001 o->bool_field_put(field_offset, val);
4002 }
4003 off++;
4004 break;
4005
4006 case 'B':
4007 if (fid != NULL) {
4008 o->byte_field_put(field_offset, dbuf->byte_at(off));
4009 }
4010 off++;
4011 break;
4012
4013 case 'C':
4014 if (fid != NULL) {
4015 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4016 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4017 o->char_field_put(field_offset, val);
4018 }
4019 off += 2;
4020 break;
4021
4022 case 'S':
4023 if (fid != NULL) {
4024 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4025 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4026 o->short_field_put(field_offset, val);
4027 }
4028 off += 2;
4029 break;
4030
4031 case 'I':
4032 if (fid != NULL) {
4033 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4034 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4035 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4036 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4037 o->int_field_put(field_offset, ival);
4038 }
4039 off += 4;
4040 break;
4041
4042 case 'F':
4043 if (fid != NULL) {
4044 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4045 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4046 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4047 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4048 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4049 o->float_field_put(field_offset, fval);
4050 }
4051 off += 4;
4052 break;
4053
4054 case 'J':
4055 if (fid != NULL) {
4056 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4057 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4058 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4059 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4060 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4061 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4062 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4063 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4064 o->long_field_put(field_offset, lval);
4065 }
4066 off += 8;
4067 break;
4068
4069 case 'D':
4070 if (fid != NULL) {
4071 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4072 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4073 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4074 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4075 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4076 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4077 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4078 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4079 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4080 o->double_field_put(field_offset, dval);
4081 }
4082 off += 8;
4083 break;
4084
4085 default:
4086 // Illegal typecode
4087 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4088 }
4089 }
4090 JVM_END
4091
4092
4093 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4094 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4095 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4096
4097 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4098 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4099 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4100 oop o = JNIHandles::resolve(obj);
4101
4102 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4103 THROW(vmSymbols::java_lang_NullPointerException());
4104 }
4105
4106 jsize nfids = fids->length();
4107 if (nfids == 0) return;
4108
4109 if (tcodes->length() < nfids) {
4110 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4111 }
4112
4113 /* loop through fields, fetching values */
4114 jsize off = 0;
4115 for (jsize i = 0; i < nfids; i++) {
4116 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4117 if (fid == NULL) {
4118 THROW(vmSymbols::java_lang_NullPointerException());
4119 }
4120 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4121
4122 switch (tcodes->char_at(i)) {
4123 case 'Z':
4124 {
4125 jboolean val = o->bool_field(field_offset);
4126 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4127 }
4128 break;
4129
4130 case 'B':
4131 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4132 break;
4133
4134 case 'C':
4135 {
4136 jchar val = o->char_field(field_offset);
4137 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4138 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4139 }
4140 break;
4141
4142 case 'S':
4143 {
4144 jshort val = o->short_field(field_offset);
4145 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4146 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4147 }
4148 break;
4149
4150 case 'I':
4151 {
4152 jint val = o->int_field(field_offset);
4153 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4154 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4155 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4156 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4157 }
4158 break;
4159
4160 case 'F':
4161 {
4162 jfloat fval = o->float_field(field_offset);
4163 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4164 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4165 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4166 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4167 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4168 }
4169 break;
4170
4171 case 'J':
4172 {
4173 jlong val = o->long_field(field_offset);
4174 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4175 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4176 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4177 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4178 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4179 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4180 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4181 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4182 }
4183 break;
4184
4185 case 'D':
4186 {
4187 jdouble dval = o->double_field(field_offset);
4188 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4189 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4190 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4191 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4192 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4193 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4194 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4195 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4196 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4197 }
4198 break;
4199
4200 default:
4201 // Illegal typecode
4202 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4203 }
4204 }
4205 JVM_END
4206
4207
4208 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4209
4210 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4211 // Security Note:
4212 // The Java level wrapper will perform the necessary security check allowing
4213 // us to pass the NULL as the initiating class loader.
4214 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4215
4216 KlassHandle klass_handle(THREAD, klass);
4217 // Check if we should initialize the class
4218 if (init && klass_handle->oop_is_instance()) {
4219 klass_handle->initialize(CHECK_NULL);
4220 }
4221 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4222 }
4223
4224
4225 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4226
4227 #ifndef PRODUCT
4228
4229 extern "C" {
4230 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4231 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4232 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4233 }
4234
4235 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4236 JVMWrapper("JVM_AccessBoolVMFlag");
4237 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4238 JVM_END
4239
4240 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4241 JVMWrapper("JVM_AccessVMIntFlag");
4242 intx v;
4243 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4244 *value = (jint)v;
4245 return result;
4246 JVM_END
4247
4248
4249 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4250 JVMWrapper("JVM_VMBreakPoint");
4251 oop the_obj = JNIHandles::resolve(obj);
4252 BREAKPOINT;
4253 JVM_END
4254
4255
4256 #endif
4257
4258
4259 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4260
4261 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4262 JVMWrapper("JVM_InvokeMethod");
4263 Handle method_handle;
4264 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4265 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4266 Handle receiver(THREAD, JNIHandles::resolve(obj));
4267 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4268 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4269 jobject res = JNIHandles::make_local(env, result);
4270 if (JvmtiExport::should_post_vm_object_alloc()) {
4271 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4272 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4273 if (java_lang_Class::is_primitive(ret_type)) {
4274 // Only for primitive type vm allocates memory for java object.
4275 // See box() method.
4276 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4277 }
4278 }
4279 return res;
4280 } else {
4281 THROW_0(vmSymbols::java_lang_StackOverflowError());
4282 }
4283 JVM_END
4284
4285
4286 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4287 JVMWrapper("JVM_NewInstanceFromConstructor");
4288 oop constructor_mirror = JNIHandles::resolve(c);
4289 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4290 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4291 jobject res = JNIHandles::make_local(env, result);
4292 if (JvmtiExport::should_post_vm_object_alloc()) {
4293 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4294 }
4295 return res;
4296 JVM_END
4297
4298 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4299
4300 JVM_LEAF(jboolean, JVM_SupportsCX8())
4301 JVMWrapper("JVM_SupportsCX8");
4302 return VM_Version::supports_cx8();
4303 JVM_END
4304
4305
4306 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4307 JVMWrapper("JVM_CX8Field");
4308 jlong res;
4309 oop o = JNIHandles::resolve(obj);
4310 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4311 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4312
4313 assert(VM_Version::supports_cx8(), "cx8 not supported");
4314 res = Atomic::cmpxchg(newVal, addr, oldVal);
4315
4316 return res == oldVal;
4317 JVM_END
4318
4319 // DTrace ///////////////////////////////////////////////////////////////////
4320
4321 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4322 JVMWrapper("JVM_DTraceGetVersion");
4323 return (jint)JVM_TRACING_DTRACE_VERSION;
4324 JVM_END
4325
4326 JVM_ENTRY(jlong,JVM_DTraceActivate(
4327 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4328 JVM_DTraceProvider* providers))
4329 JVMWrapper("JVM_DTraceActivate");
4330 return DTraceJSDT::activate(
4331 version, module_name, providers_count, providers, CHECK_0);
4332 JVM_END
4333
4334 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4335 JVMWrapper("JVM_DTraceIsProbeEnabled");
4336 return DTraceJSDT::is_probe_enabled(method);
4337 JVM_END
4338
4339 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4340 JVMWrapper("JVM_DTraceDispose");
4341 DTraceJSDT::dispose(handle);
4342 JVM_END
4343
4344 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4345 JVMWrapper("JVM_DTraceIsSupported");
4346 return DTraceJSDT::is_supported();
4347 JVM_END
4348
4349 // Returns an array of all live Thread objects (VM internal JavaThreads,
4350 // jvmti agent threads, and JNI attaching threads are skipped)
4351 // See CR 6404306 regarding JNI attaching threads
4352 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4353 ResourceMark rm(THREAD);
4354 ThreadsListEnumerator tle(THREAD, false, false);
4355 JvmtiVMObjectAllocEventCollector oam;
4356
4357 int num_threads = tle.num_threads();
4358 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4359 objArrayHandle threads_ah(THREAD, r);
4360
4361 for (int i = 0; i < num_threads; i++) {
4362 Handle h = tle.get_threadObj(i);
4363 threads_ah->obj_at_put(i, h());
4364 }
4365
4366 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4367 JVM_END
4368
4369
4370 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4371 // Return StackTraceElement[][], each element is the stack trace of a thread in
4372 // the corresponding entry in the given threads array
4373 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4374 JVMWrapper("JVM_DumpThreads");
4375 JvmtiVMObjectAllocEventCollector oam;
4376
4377 // Check if threads is null
4378 if (threads == NULL) {
4379 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4380 }
4381
4382 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4383 objArrayHandle ah(THREAD, a);
4384 int num_threads = ah->length();
4385 // check if threads is non-empty array
4386 if (num_threads == 0) {
4387 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4388 }
4389
4390 // check if threads is not an array of objects of Thread class
4391 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4392 if (k != SystemDictionary::Thread_klass()) {
4393 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4394 }
4395
4396 ResourceMark rm(THREAD);
4397
4398 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4399 for (int i = 0; i < num_threads; i++) {
4400 oop thread_obj = ah->obj_at(i);
4401 instanceHandle h(THREAD, (instanceOop) thread_obj);
4402 thread_handle_array->append(h);
4403 }
4404
4405 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4406 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4407
4408 JVM_END
4409
4410 // JVM monitoring and management support
4411 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4412 return Management::get_jmm_interface(version);
4413 JVM_END
4414
4415 // com.sun.tools.attach.VirtualMachine agent properties support
4416 //
4417 // Initialize the agent properties with the properties maintained in the VM
4418 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4419 JVMWrapper("JVM_InitAgentProperties");
4420 ResourceMark rm;
4421
4422 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4423
4424 PUTPROP(props, "sun.java.command", Arguments::java_command());
4425 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4426 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4427 return properties;
4428 JVM_END
4429
4430 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4431 {
4432 JVMWrapper("JVM_GetEnclosingMethodInfo");
4433 JvmtiVMObjectAllocEventCollector oam;
4434
4435 if (ofClass == NULL) {
4436 return NULL;
4437 }
4438 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4439 // Special handling for primitive objects
4440 if (java_lang_Class::is_primitive(mirror())) {
4441 return NULL;
4442 }
4443 Klass* k = java_lang_Class::as_Klass(mirror());
4444 if (!k->oop_is_instance()) {
4445 return NULL;
4446 }
4447 instanceKlassHandle ik_h(THREAD, k);
4448 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4449 if (encl_method_class_idx == 0) {
4450 return NULL;
4451 }
4452 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4453 objArrayHandle dest(THREAD, dest_o);
4454 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4455 dest->obj_at_put(0, enc_k->java_mirror());
4456 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4457 if (encl_method_method_idx != 0) {
4458 Symbol* sym = ik_h->constants()->symbol_at(
4459 extract_low_short_from_int(
4460 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4461 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4462 dest->obj_at_put(1, str());
4463 sym = ik_h->constants()->symbol_at(
4464 extract_high_short_from_int(
4465 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4466 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4467 dest->obj_at_put(2, str());
4468 }
4469 return (jobjectArray) JNIHandles::make_local(dest());
4470 }
4471 JVM_END
4472
4473 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4474 jint javaThreadState))
4475 {
4476 // If new thread states are added in future JDK and VM versions,
4477 // this should check if the JDK version is compatible with thread
4478 // states supported by the VM. Return NULL if not compatible.
4479 //
4480 // This function must map the VM java_lang_Thread::ThreadStatus
4481 // to the Java thread state that the JDK supports.
4482 //
4483
4484 typeArrayHandle values_h;
4485 switch (javaThreadState) {
4486 case JAVA_THREAD_STATE_NEW : {
4487 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4488 values_h = typeArrayHandle(THREAD, r);
4489 values_h->int_at_put(0, java_lang_Thread::NEW);
4490 break;
4491 }
4492 case JAVA_THREAD_STATE_RUNNABLE : {
4493 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4494 values_h = typeArrayHandle(THREAD, r);
4495 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4496 break;
4497 }
4498 case JAVA_THREAD_STATE_BLOCKED : {
4499 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4500 values_h = typeArrayHandle(THREAD, r);
4501 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4502 break;
4503 }
4504 case JAVA_THREAD_STATE_WAITING : {
4505 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4506 values_h = typeArrayHandle(THREAD, r);
4507 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4508 values_h->int_at_put(1, java_lang_Thread::PARKED);
4509 break;
4510 }
4511 case JAVA_THREAD_STATE_TIMED_WAITING : {
4512 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4513 values_h = typeArrayHandle(THREAD, r);
4514 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4515 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4516 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4517 break;
4518 }
4519 case JAVA_THREAD_STATE_TERMINATED : {
4520 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4521 values_h = typeArrayHandle(THREAD, r);
4522 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4523 break;
4524 }
4525 default:
4526 // Unknown state - probably incompatible JDK version
4527 return NULL;
4528 }
4529
4530 return (jintArray) JNIHandles::make_local(env, values_h());
4531 }
4532 JVM_END
4533
4534
4535 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4536 jint javaThreadState,
4537 jintArray values))
4538 {
4539 // If new thread states are added in future JDK and VM versions,
4540 // this should check if the JDK version is compatible with thread
4541 // states supported by the VM. Return NULL if not compatible.
4542 //
4543 // This function must map the VM java_lang_Thread::ThreadStatus
4544 // to the Java thread state that the JDK supports.
4545 //
4546
4547 ResourceMark rm;
4548
4549 // Check if threads is null
4550 if (values == NULL) {
4551 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4552 }
4553
4554 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4555 typeArrayHandle values_h(THREAD, v);
4556
4557 objArrayHandle names_h;
4558 switch (javaThreadState) {
4559 case JAVA_THREAD_STATE_NEW : {
4560 assert(values_h->length() == 1 &&
4561 values_h->int_at(0) == java_lang_Thread::NEW,
4562 "Invalid threadStatus value");
4563
4564 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4565 1, /* only 1 substate */
4566 CHECK_NULL);
4567 names_h = objArrayHandle(THREAD, r);
4568 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4569 names_h->obj_at_put(0, name());
4570 break;
4571 }
4572 case JAVA_THREAD_STATE_RUNNABLE : {
4573 assert(values_h->length() == 1 &&
4574 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4575 "Invalid threadStatus value");
4576
4577 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4578 1, /* only 1 substate */
4579 CHECK_NULL);
4580 names_h = objArrayHandle(THREAD, r);
4581 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4582 names_h->obj_at_put(0, name());
4583 break;
4584 }
4585 case JAVA_THREAD_STATE_BLOCKED : {
4586 assert(values_h->length() == 1 &&
4587 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4588 "Invalid threadStatus value");
4589
4590 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4591 1, /* only 1 substate */
4592 CHECK_NULL);
4593 names_h = objArrayHandle(THREAD, r);
4594 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4595 names_h->obj_at_put(0, name());
4596 break;
4597 }
4598 case JAVA_THREAD_STATE_WAITING : {
4599 assert(values_h->length() == 2 &&
4600 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4601 values_h->int_at(1) == java_lang_Thread::PARKED,
4602 "Invalid threadStatus value");
4603 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4604 2, /* number of substates */
4605 CHECK_NULL);
4606 names_h = objArrayHandle(THREAD, r);
4607 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4608 CHECK_NULL);
4609 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4610 CHECK_NULL);
4611 names_h->obj_at_put(0, name0());
4612 names_h->obj_at_put(1, name1());
4613 break;
4614 }
4615 case JAVA_THREAD_STATE_TIMED_WAITING : {
4616 assert(values_h->length() == 3 &&
4617 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4618 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4619 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4620 "Invalid threadStatus value");
4621 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4622 3, /* number of substates */
4623 CHECK_NULL);
4624 names_h = objArrayHandle(THREAD, r);
4625 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4626 CHECK_NULL);
4627 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4628 CHECK_NULL);
4629 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4630 CHECK_NULL);
4631 names_h->obj_at_put(0, name0());
4632 names_h->obj_at_put(1, name1());
4633 names_h->obj_at_put(2, name2());
4634 break;
4635 }
4636 case JAVA_THREAD_STATE_TERMINATED : {
4637 assert(values_h->length() == 1 &&
4638 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4639 "Invalid threadStatus value");
4640 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4641 1, /* only 1 substate */
4642 CHECK_NULL);
4643 names_h = objArrayHandle(THREAD, r);
4644 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4645 names_h->obj_at_put(0, name());
4646 break;
4647 }
4648 default:
4649 // Unknown state - probably incompatible JDK version
4650 return NULL;
4651 }
4652 return (jobjectArray) JNIHandles::make_local(env, names_h());
4653 }
4654 JVM_END
4655
4656 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4657 {
4658 memset(info, 0, sizeof(info_size));
4659
4660 info->jvm_version = Abstract_VM_Version::jvm_version();
4661 info->update_version = 0; /* 0 in HotSpot Express VM */
4662 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4663
4664 // when we add a new capability in the jvm_version_info struct, we should also
4665 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4666 // counter defined in runtimeService.cpp.
4667 info->is_attachable = AttachListener::is_attach_supported();
4668 }
4669 JVM_END