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 "utilities/copy.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/top.hpp"
68 #include "utilities/utf8.hpp"
69 #ifdef TARGET_OS_FAMILY_linux
70 # include "jvm_linux.h"
71 #endif
72 #ifdef TARGET_OS_FAMILY_solaris
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "jvm_windows.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_bsd
79 # include "jvm_bsd.h"
80 #endif
81
82 #include <errno.h>
83
84 #ifndef USDT2
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
88 #endif /* !USDT2 */
89
90 /*
91 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
92 such ctors and calls MUST NOT come between an oop declaration/init and its
93 usage because if objects are move this may cause various memory stomps, bus
94 errors and segfaults. Here is a cookbook for causing so called "naked oop
95 failures":
96
97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
98 JVMWrapper("JVM_GetClassDeclaredFields");
99
100 // Object address to be held directly in mirror & not visible to GC
101 oop mirror = JNIHandles::resolve_non_null(ofClass);
102
103 // If this ctor can hit a safepoint, moving objects around, then
104 ComplexConstructor foo;
105
106 // Boom! mirror may point to JUNK instead of the intended object
107 (some dereference of mirror)
108
109 // Here's another call that may block for GC, making mirror stale
110 MutexLocker ml(some_lock);
111
112 // And here's an initializer that can result in a stale oop
113 // all in one step.
114 oop o = call_that_can_throw_exception(TRAPS);
115
116
117 The solution is to keep the oop declaration BELOW the ctor or function
118 call that might cause a GC, do another resolve to reassign the oop, or
119 consider use of a Handle instead of an oop so there is immunity from object
120 motion. But note that the "QUICK" entries below do not have a handlemark
121 and thus can only support use of handles passed in.
122 */
123
124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
125 ResourceMark rm;
126 int line_number = -1;
127 const char * source_file = NULL;
128 const char * trace = "explicit";
129 InstanceKlass* caller = NULL;
130 JavaThread* jthread = JavaThread::current();
131 if (jthread->has_last_Java_frame()) {
132 vframeStream vfst(jthread);
133
134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
136 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
138 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
139
140 Method* last_caller = NULL;
141
142 while (!vfst.at_end()) {
143 Method* m = vfst.method();
144 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
145 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
146 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
147 break;
148 }
149 last_caller = m;
150 vfst.next();
151 }
152 // if this is called from Class.forName0 and that is called from Class.forName,
153 // then print the caller of Class.forName. If this is Class.loadClass, then print
154 // that caller, otherwise keep quiet since this should be picked up elsewhere.
155 bool found_it = false;
156 if (!vfst.at_end() &&
157 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName0_name()) {
159 vfst.next();
160 if (!vfst.at_end() &&
161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName_name()) {
163 vfst.next();
164 found_it = true;
165 }
166 } else if (last_caller != NULL &&
167 last_caller->method_holder()->name() ==
168 vmSymbols::java_lang_ClassLoader() &&
169 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
170 last_caller->name() == vmSymbols::loadClass_name())) {
171 found_it = true;
172 } else if (!vfst.at_end()) {
173 if (vfst.method()->is_native()) {
174 // JNI call
175 found_it = true;
176 }
177 }
178 if (found_it && !vfst.at_end()) {
179 // found the caller
180 caller = vfst.method()->method_holder();
181 line_number = vfst.method()->line_number_from_bci(vfst.bci());
182 if (line_number == -1) {
183 // show method name if it's a native method
184 trace = vfst.method()->name_and_sig_as_C_string();
185 }
186 Symbol* s = caller->source_file_name();
187 if (s != NULL) {
188 source_file = s->as_C_string();
189 }
190 }
191 }
192 if (caller != NULL) {
193 if (to_class != caller) {
194 const char * from = caller->external_name();
195 const char * to = to_class->external_name();
196 // print in a single call to reduce interleaving between threads
197 if (source_file != NULL) {
198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
199 } else {
200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
201 }
202 }
203 }
204 }
205
206 void trace_class_resolution(Klass* to_class) {
207 EXCEPTION_MARK;
208 trace_class_resolution_impl(to_class, THREAD);
209 if (HAS_PENDING_EXCEPTION) {
210 CLEAR_PENDING_EXCEPTION;
211 }
212 }
213
214 // Wrapper to trace JVM functions
215
216 #ifdef ASSERT
217 class JVMTraceWrapper : public StackObj {
218 public:
219 JVMTraceWrapper(const char* format, ...) {
220 if (TraceJVMCalls) {
221 va_list ap;
222 va_start(ap, format);
223 tty->print("JVM ");
224 tty->vprint_cr(format, ap);
225 va_end(ap);
226 }
227 }
228 };
229
230 Histogram* JVMHistogram;
231 volatile jint JVMHistogram_lock = 0;
232
233 class JVMHistogramElement : public HistogramElement {
234 public:
235 JVMHistogramElement(const char* name);
236 };
237
238 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
239 _name = elementName;
240 uintx count = 0;
241
242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
244 count +=1;
245 if ( (WarnOnStalledSpinLock > 0)
246 && (count % WarnOnStalledSpinLock == 0)) {
247 warning("JVMHistogram_lock seems to be stalled");
248 }
249 }
250 }
251
252 if(JVMHistogram == NULL)
253 JVMHistogram = new Histogram("JVM Call Counts",100);
254
255 JVMHistogram->add_element(this);
256 Atomic::dec(&JVMHistogram_lock);
257 }
258
259 #define JVMCountWrapper(arg) \
260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
262
263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
267 #else
268 #define JVMWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4)
272 #endif
273
274
275 // Interface version /////////////////////////////////////////////////////////////////////
276
277
278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
279 return JVM_INTERFACE_VERSION;
280 JVM_END
281
282
283 // java.lang.System //////////////////////////////////////////////////////////////////////
284
285
286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
287 JVMWrapper("JVM_CurrentTimeMillis");
288 return os::javaTimeMillis();
289 JVM_END
290
291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_NanoTime");
293 return os::javaTimeNanos();
294 JVM_END
295
296
297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 JVMWrapper("JVM_ArrayCopy");
300 // Check if we have null pointers
301 if (src == NULL || dst == NULL) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
311
312
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
328
329
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
331
332
333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
334 JVMWrapper("JVM_InitProperties");
335 ResourceMark rm;
336
337 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
338
339 // System property list includes both user set via -D option and
340 // jvm system specific properties.
341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
342 PUTPROP(props, p->key(), p->value());
343 }
344
345 // Convert the -XX:MaxDirectMemorySize= command line flag
346 // to the sun.nio.MaxDirectMemorySize property.
347 // Do this after setting user properties to prevent people
348 // from setting the value with a -D option, as requested.
349 {
350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
352 } else {
353 char as_chars[256];
354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
356 }
357 }
358
359 // JVM monitoring and management support
360 // Add the sun.management.compiler property for the compiler's name
361 {
362 #undef CSIZE
363 #if defined(_LP64) || defined(_WIN64)
364 #define CSIZE "64-Bit "
365 #else
366 #define CSIZE
367 #endif // 64bit
368
369 #ifdef TIERED
370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
371 #else
372 #if defined(COMPILER1)
373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
374 #elif defined(COMPILER2)
375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
376 #else
377 const char* compiler_name = "";
378 #endif // compilers
379 #endif // TIERED
380
381 if (*compiler_name != '\0' &&
382 (Arguments::mode() != Arguments::_int)) {
383 PUTPROP(props, "sun.management.compiler", compiler_name);
384 }
385 }
386
387 return properties;
388 JVM_END
389
390
391 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
392
393 extern volatile jint vm_created;
394
395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
396 if (vm_created != 0 && (code == 0)) {
397 // The VM is about to exit. We call back into Java to check whether finalizers should be run
398 Universe::run_finalizers_on_exit();
399 }
400 before_exit(thread);
401 vm_exit(code);
402 JVM_END
403
404
405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
406 before_exit(thread);
407 vm_exit(code);
408 JVM_END
409
410
411 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
412 register_on_exit_function(func);
413 JVM_END
414
415
416 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
417 JVMWrapper("JVM_GC");
418 if (!DisableExplicitGC) {
419 Universe::heap()->collect(GCCause::_java_lang_system_gc);
420 }
421 JVM_END
422
423
424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
425 JVMWrapper("JVM_MaxObjectInspectionAge");
426 return Universe::heap()->millis_since_last_gc();
427 JVM_END
428
429
430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
431 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
432 JVM_END
433
434
435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
436 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
437 JVM_END
438
439 static inline jlong convert_size_t_to_jlong(size_t val) {
440 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
441 NOT_LP64 (return (jlong)val;)
442 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
443 }
444
445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
446 JVMWrapper("JVM_TotalMemory");
447 size_t n = Universe::heap()->capacity();
448 return convert_size_t_to_jlong(n);
449 JVM_END
450
451
452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
453 JVMWrapper("JVM_FreeMemory");
454 CollectedHeap* ch = Universe::heap();
455 size_t n;
456 {
457 MutexLocker x(Heap_lock);
458 n = ch->capacity() - ch->used();
459 }
460 return convert_size_t_to_jlong(n);
461 JVM_END
462
463
464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
465 JVMWrapper("JVM_MaxMemory");
466 size_t n = Universe::heap()->max_capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
469
470
471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
472 JVMWrapper("JVM_ActiveProcessorCount");
473 return os::active_processor_count();
474 JVM_END
475
476
477
478 // java.lang.Throwable //////////////////////////////////////////////////////
479
480
481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
482 JVMWrapper("JVM_FillInStackTrace");
483 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
484 java_lang_Throwable::fill_in_stack_trace(exception);
485 JVM_END
486
487
488 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
489 JVMWrapper("JVM_GetStackTraceDepth");
490 oop exception = JNIHandles::resolve(throwable);
491 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
492 JVM_END
493
494
495 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
496 JVMWrapper("JVM_GetStackTraceElement");
497 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
498 oop exception = JNIHandles::resolve(throwable);
499 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
500 return JNIHandles::make_local(env, element);
501 JVM_END
502
503
504 // java.lang.Object ///////////////////////////////////////////////
505
506
507 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
508 JVMWrapper("JVM_IHashCode");
509 // as implemented in the classic virtual machine; return 0 if object is NULL
510 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
511 JVM_END
512
513
514 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
515 JVMWrapper("JVM_MonitorWait");
516 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
517 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
518 if (JvmtiExport::should_post_monitor_wait()) {
519 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
520 }
521 ObjectSynchronizer::wait(obj, ms, CHECK);
522 JVM_END
523
524
525 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
526 JVMWrapper("JVM_MonitorNotify");
527 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
528 ObjectSynchronizer::notify(obj, CHECK);
529 JVM_END
530
531
532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
533 JVMWrapper("JVM_MonitorNotifyAll");
534 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
535 ObjectSynchronizer::notifyall(obj, CHECK);
536 JVM_END
537
538
539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
540 JVMWrapper("JVM_Clone");
541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
542 const KlassHandle klass (THREAD, obj->klass());
543 JvmtiVMObjectAllocEventCollector oam;
544
545 #ifdef ASSERT
546 // Just checking that the cloneable flag is set correct
547 if (obj->is_array()) {
548 guarantee(klass->is_cloneable(), "all arrays are cloneable");
549 } else {
550 guarantee(obj->is_instance(), "should be instanceOop");
551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
553 }
554 #endif
555
556 // Check if class of obj supports the Cloneable interface.
557 // All arrays are considered to be cloneable (See JLS 20.1.5)
558 if (!klass->is_cloneable()) {
559 ResourceMark rm(THREAD);
560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
561 }
562
563 // Make shallow object copy
564 const int size = obj->size();
565 oop new_obj = NULL;
566 if (obj->is_array()) {
567 const int length = ((arrayOop)obj())->length();
568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
569 } else {
570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
571 }
572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
573 // is modifying a reference field in the clonee, a non-oop-atomic copy might
574 // be suspended in the middle of copying the pointer and end up with parts
575 // of two different pointers in the field. Subsequent dereferences will crash.
576 // 4846409: an oop-copy of objects with long or double fields or arrays of same
577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
578 // of oops. We know objects are aligned on a minimum of an jlong boundary.
579 // The same is true of StubRoutines::object_copy and the various oop_copy
580 // variants, and of the code generated by the inline_native_clone intrinsic.
581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
583 (size_t)align_object_size(size) / HeapWordsPerLong);
584 // Clear the header
585 new_obj->init_mark();
586
587 // Store check (mark entire object and let gc sort it out)
588 BarrierSet* bs = Universe::heap()->barrier_set();
589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
590 bs->write_region(MemRegion((HeapWord*)new_obj, size));
591
592 // Caution: this involves a java upcall, so the clone should be
593 // "gc-robust" by this stage.
594 if (klass->has_finalizer()) {
595 assert(obj->is_instance(), "should be instanceOop");
596 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
597 }
598
599 return JNIHandles::make_local(env, oop(new_obj));
600 JVM_END
601
602 // java.lang.Compiler ////////////////////////////////////////////////////
603
604 // The initial cuts of the HotSpot VM will not support JITs, and all existing
605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
606 // functions are all silently ignored unless JVM warnings are printed.
607
608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
610 JVM_END
611
612
613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
615 return JNI_FALSE;
616 JVM_END
617
618
619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
621 return JNI_FALSE;
622 JVM_END
623
624
625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
627 return JNI_FALSE;
628 JVM_END
629
630
631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
633 return NULL;
634 JVM_END
635
636
637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
639 JVM_END
640
641
642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
644 JVM_END
645
646
647
648 // Error message support //////////////////////////////////////////////////////
649
650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
651 JVMWrapper("JVM_GetLastErrorString");
652 return (jint)os::lasterror(buf, len);
653 JVM_END
654
655
656 // java.io.File ///////////////////////////////////////////////////////////////
657
658 JVM_LEAF(char*, JVM_NativePath(char* path))
659 JVMWrapper2("JVM_NativePath (%s)", path);
660 return os::native_path(path);
661 JVM_END
662
663
664 // Misc. class handling ///////////////////////////////////////////////////////////
665
666
667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
668 JVMWrapper("JVM_GetCallerClass");
669
670 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
671 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
672 Klass* k = thread->security_get_caller_class(depth);
673 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
674 } else {
675 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
676 assert(depth == -1, "wrong handshake depth");
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 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1076 objArrayOop signers = NULL;
1077 if (k->oop_is_instance()) {
1078 signers = InstanceKlass::cast(k)->signers();
1079 }
1080
1081 // If there are no signers set in the class, or if the class
1082 // is an array, return NULL.
1083 if (signers == NULL) return NULL;
1084
1085 // copy of the signers array
1086 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1087 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1088 for (int index = 0; index < signers->length(); index++) {
1089 signers_copy->obj_at_put(index, signers->obj_at(index));
1090 }
1091
1092 // return the copy
1093 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1094 JVM_END
1095
1096
1097 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1098 JVMWrapper("JVM_SetClassSigners");
1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1100 // This call is ignored for primitive types and arrays.
1101 // Signers are only set once, ClassLoader.java, and thus shouldn't
1102 // be called with an array. Only the bootstrap loader creates arrays.
1103 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1104 if (k->oop_is_instance()) {
1105 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1106 }
1107 }
1108 JVM_END
1109
1110
1111 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1112 JVMWrapper("JVM_GetProtectionDomain");
1113 if (JNIHandles::resolve(cls) == NULL) {
1114 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1115 }
1116
1117 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1118 // Primitive types does not have a protection domain.
1119 return NULL;
1120 }
1121
1122 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1123 return (jobject) JNIHandles::make_local(env, k->protection_domain());
1124 JVM_END
1125
1126
1127 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1128 // still defined in core libraries as of 1.5.
1129 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1130 JVMWrapper("JVM_SetProtectionDomain");
1131 if (JNIHandles::resolve(cls) == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1135 // Call is ignored for primitive types
1136 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1137
1138 // cls won't be an array, as this called only from ClassLoader.defineClass
1139 if (k->oop_is_instance()) {
1140 oop pd = JNIHandles::resolve(protection_domain);
1141 assert(pd == NULL || pd->is_oop(), "just checking");
1142 InstanceKlass::cast(k)->set_protection_domain(pd);
1143 }
1144 }
1145 JVM_END
1146
1147
1148 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1149 JVMWrapper("JVM_DoPrivileged");
1150
1151 if (action == NULL) {
1152 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1153 }
1154
1155 // Stack allocated list of privileged stack elements
1156 PrivilegedElement pi;
1157
1158 // Check that action object understands "Object run()"
1159 Handle object (THREAD, JNIHandles::resolve(action));
1160
1161 // get run() method
1162 Method* m_oop = object->klass()->uncached_lookup_method(
1163 vmSymbols::run_method_name(),
1164 vmSymbols::void_object_signature());
1165 methodHandle m (THREAD, m_oop);
1166 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1167 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1168 }
1169
1170 // Compute the frame initiating the do privileged operation and setup the privileged stack
1171 vframeStream vfst(thread);
1172 vfst.security_get_caller_frame(1);
1173
1174 if (!vfst.at_end()) {
1175 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1176 thread->set_privileged_stack_top(&pi);
1177 }
1178
1179
1180 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1181 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1182 Handle pending_exception;
1183 JavaValue result(T_OBJECT);
1184 JavaCallArguments args(object);
1185 JavaCalls::call(&result, m, &args, THREAD);
1186
1187 // done with action, remove ourselves from the list
1188 if (!vfst.at_end()) {
1189 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1190 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1191 }
1192
1193 if (HAS_PENDING_EXCEPTION) {
1194 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1195 CLEAR_PENDING_EXCEPTION;
1196
1197 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1198 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1199 // Throw a java.security.PrivilegedActionException(Exception e) exception
1200 JavaCallArguments args(pending_exception);
1201 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1202 vmSymbols::exception_void_signature(),
1203 &args);
1204 }
1205 }
1206
1207 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1208 return JNIHandles::make_local(env, (oop) result.get_jobject());
1209 JVM_END
1210
1211
1212 // Returns the inherited_access_control_context field of the running thread.
1213 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1214 JVMWrapper("JVM_GetInheritedAccessControlContext");
1215 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1216 return JNIHandles::make_local(env, result);
1217 JVM_END
1218
1219 class RegisterArrayForGC {
1220 private:
1221 JavaThread *_thread;
1222 public:
1223 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1224 _thread = thread;
1225 _thread->register_array_for_gc(array);
1226 }
1227
1228 ~RegisterArrayForGC() {
1229 _thread->register_array_for_gc(NULL);
1230 }
1231 };
1232
1233
1234 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1235 JVMWrapper("JVM_GetStackAccessControlContext");
1236 if (!UsePrivilegedStack) return NULL;
1237
1238 ResourceMark rm(THREAD);
1239 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1240 JvmtiVMObjectAllocEventCollector oam;
1241
1242 // count the protection domains on the execution stack. We collapse
1243 // duplicate consecutive protection domains into a single one, as
1244 // well as stopping when we hit a privileged frame.
1245
1246 // Use vframeStream to iterate through Java frames
1247 vframeStream vfst(thread);
1248
1249 oop previous_protection_domain = NULL;
1250 Handle privileged_context(thread, NULL);
1251 bool is_privileged = false;
1252 oop protection_domain = NULL;
1253
1254 for(; !vfst.at_end(); vfst.next()) {
1255 // get method of frame
1256 Method* method = vfst.method();
1257 intptr_t* frame_id = vfst.frame_id();
1258
1259 // check the privileged frames to see if we have a match
1260 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1261 // this frame is privileged
1262 is_privileged = true;
1263 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1264 protection_domain = thread->privileged_stack_top()->protection_domain();
1265 } else {
1266 protection_domain = method->method_holder()->protection_domain();
1267 }
1268
1269 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1270 local_array->push(protection_domain);
1271 previous_protection_domain = protection_domain;
1272 }
1273
1274 if (is_privileged) break;
1275 }
1276
1277
1278 // either all the domains on the stack were system domains, or
1279 // we had a privileged system domain
1280 if (local_array->is_empty()) {
1281 if (is_privileged && privileged_context.is_null()) return NULL;
1282
1283 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1284 return JNIHandles::make_local(env, result);
1285 }
1286
1287 // the resource area must be registered in case of a gc
1288 RegisterArrayForGC ragc(thread, local_array);
1289 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1290 local_array->length(), CHECK_NULL);
1291 objArrayHandle h_context(thread, context);
1292 for (int index = 0; index < local_array->length(); index++) {
1293 h_context->obj_at_put(index, local_array->at(index));
1294 }
1295
1296 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1297
1298 return JNIHandles::make_local(env, result);
1299 JVM_END
1300
1301
1302 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1303 JVMWrapper("JVM_IsArrayClass");
1304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1305 return (k != NULL) && k->oop_is_array() ? true : false;
1306 JVM_END
1307
1308
1309 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1310 JVMWrapper("JVM_IsPrimitiveClass");
1311 oop mirror = JNIHandles::resolve_non_null(cls);
1312 return (jboolean) java_lang_Class::is_primitive(mirror);
1313 JVM_END
1314
1315
1316 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1317 JVMWrapper("JVM_GetComponentType");
1318 oop mirror = JNIHandles::resolve_non_null(cls);
1319 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1320 return (jclass) JNIHandles::make_local(env, result);
1321 JVM_END
1322
1323
1324 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1325 JVMWrapper("JVM_GetClassModifiers");
1326 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1327 // Primitive type
1328 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1329 }
1330
1331 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1332 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1333 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1334 return k->modifier_flags();
1335 JVM_END
1336
1337
1338 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1339
1340 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1341 JvmtiVMObjectAllocEventCollector oam;
1342 // ofClass is a reference to a java_lang_Class object. The mirror object
1343 // of an InstanceKlass
1344
1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1346 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1347 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1348 return (jobjectArray)JNIHandles::make_local(env, result);
1349 }
1350
1351 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1352 InnerClassesIterator iter(k);
1353
1354 if (iter.length() == 0) {
1355 // Neither an inner nor outer class
1356 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1357 return (jobjectArray)JNIHandles::make_local(env, result);
1358 }
1359
1360 // find inner class info
1361 constantPoolHandle cp(thread, k->constants());
1362 int length = iter.length();
1363
1364 // Allocate temp. result array
1365 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1366 objArrayHandle result (THREAD, r);
1367 int members = 0;
1368
1369 for (; !iter.done(); iter.next()) {
1370 int ioff = iter.inner_class_info_index();
1371 int ooff = iter.outer_class_info_index();
1372
1373 if (ioff != 0 && ooff != 0) {
1374 // Check to see if the name matches the class we're looking for
1375 // before attempting to find the class.
1376 if (cp->klass_name_at_matches(k, ooff)) {
1377 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1378 if (outer_klass == k()) {
1379 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1380 instanceKlassHandle inner_klass (THREAD, ik);
1381
1382 // Throws an exception if outer klass has not declared k as
1383 // an inner klass
1384 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1385
1386 result->obj_at_put(members, inner_klass->java_mirror());
1387 members++;
1388 }
1389 }
1390 }
1391 }
1392
1393 if (members != length) {
1394 // Return array of right length
1395 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1396 for(int i = 0; i < members; i++) {
1397 res->obj_at_put(i, result->obj_at(i));
1398 }
1399 return (jobjectArray)JNIHandles::make_local(env, res);
1400 }
1401
1402 return (jobjectArray)JNIHandles::make_local(env, result());
1403 JVM_END
1404
1405
1406 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1407 {
1408 // ofClass is a reference to a java_lang_Class object.
1409 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1410 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1411 return NULL;
1412 }
1413
1414 bool inner_is_member = false;
1415 Klass* outer_klass
1416 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1417 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1418 if (outer_klass == NULL) return NULL; // already a top-level class
1419 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1420 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1421 }
1422 JVM_END
1423
1424 // should be in InstanceKlass.cpp, but is here for historical reasons
1425 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1426 bool* inner_is_member,
1427 TRAPS) {
1428 Thread* thread = THREAD;
1429 InnerClassesIterator iter(k);
1430 if (iter.length() == 0) {
1431 // No inner class info => no declaring class
1432 return NULL;
1433 }
1434
1435 constantPoolHandle i_cp(thread, k->constants());
1436
1437 bool found = false;
1438 Klass* ok;
1439 instanceKlassHandle outer_klass;
1440 *inner_is_member = false;
1441
1442 // Find inner_klass attribute
1443 for (; !iter.done() && !found; iter.next()) {
1444 int ioff = iter.inner_class_info_index();
1445 int ooff = iter.outer_class_info_index();
1446 int noff = iter.inner_name_index();
1447 if (ioff != 0) {
1448 // Check to see if the name matches the class we're looking for
1449 // before attempting to find the class.
1450 if (i_cp->klass_name_at_matches(k, ioff)) {
1451 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1452 found = (k() == inner_klass);
1453 if (found && ooff != 0) {
1454 ok = i_cp->klass_at(ooff, CHECK_NULL);
1455 outer_klass = instanceKlassHandle(thread, ok);
1456 *inner_is_member = true;
1457 }
1458 }
1459 }
1460 }
1461
1462 if (found && outer_klass.is_null()) {
1463 // It may be anonymous; try for that.
1464 int encl_method_class_idx = k->enclosing_method_class_index();
1465 if (encl_method_class_idx != 0) {
1466 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1467 outer_klass = instanceKlassHandle(thread, ok);
1468 *inner_is_member = false;
1469 }
1470 }
1471
1472 // If no inner class attribute found for this class.
1473 if (outer_klass.is_null()) return NULL;
1474
1475 // Throws an exception if outer klass has not declared k as an inner klass
1476 // We need evidence that each klass knows about the other, or else
1477 // the system could allow a spoof of an inner class to gain access rights.
1478 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1479 return outer_klass();
1480 }
1481
1482 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1483 assert (cls != NULL, "illegal class");
1484 JVMWrapper("JVM_GetClassSignature");
1485 JvmtiVMObjectAllocEventCollector oam;
1486 ResourceMark rm(THREAD);
1487 // Return null for arrays and primatives
1488 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1490 if (k->oop_is_instance()) {
1491 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1492 if (sym == NULL) return NULL;
1493 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1494 return (jstring) JNIHandles::make_local(env, str());
1495 }
1496 }
1497 return NULL;
1498 JVM_END
1499
1500
1501 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1502 assert (cls != NULL, "illegal class");
1503 JVMWrapper("JVM_GetClassAnnotations");
1504 ResourceMark rm(THREAD);
1505 // Return null for arrays and primitives
1506 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1508 if (k->oop_is_instance()) {
1509 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1510 return (jbyteArray) JNIHandles::make_local(env, a);
1511 }
1512 }
1513 return NULL;
1514 JVM_END
1515
1516
1517 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1518 assert(field != NULL, "illegal field");
1519 JVMWrapper("JVM_GetFieldAnnotations");
1520
1521 // some of this code was adapted from from jni_FromReflectedField
1522
1523 // field is a handle to a java.lang.reflect.Field object
1524 oop reflected = JNIHandles::resolve_non_null(field);
1525 oop mirror = java_lang_reflect_Field::clazz(reflected);
1526 Klass* k = java_lang_Class::as_Klass(mirror);
1527 int slot = java_lang_reflect_Field::slot(reflected);
1528 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1529
1530 fieldDescriptor fd;
1531 KlassHandle kh(THREAD, k);
1532 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1533
1534 if (modifiers & JVM_ACC_STATIC) {
1535 // for static fields we only look in the current class
1536 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1537 assert(false, "cannot find static field");
1538 return NULL; // robustness
1539 }
1540 } else {
1541 // for instance fields we start with the current class and work
1542 // our way up through the superclass chain
1543 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1544 assert(false, "cannot find instance field");
1545 return NULL; // robustness
1546 }
1547 }
1548
1549 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1550 JVM_END
1551
1552
1553 static Method* jvm_get_method_common(jobject method) {
1554 // some of this code was adapted from from jni_FromReflectedMethod
1555
1556 oop reflected = JNIHandles::resolve_non_null(method);
1557 oop mirror = NULL;
1558 int slot = 0;
1559
1560 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1561 mirror = java_lang_reflect_Constructor::clazz(reflected);
1562 slot = java_lang_reflect_Constructor::slot(reflected);
1563 } else {
1564 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1565 "wrong type");
1566 mirror = java_lang_reflect_Method::clazz(reflected);
1567 slot = java_lang_reflect_Method::slot(reflected);
1568 }
1569 Klass* k = java_lang_Class::as_Klass(mirror);
1570
1571 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1572 if (m == NULL) {
1573 assert(false, "cannot find method");
1574 return NULL; // robustness
1575 }
1576
1577 return m;
1578 }
1579
1580
1581 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1582 JVMWrapper("JVM_GetMethodAnnotations");
1583
1584 // method is a handle to a java.lang.reflect.Method object
1585 Method* m = jvm_get_method_common(method);
1586 return (jbyteArray) JNIHandles::make_local(env,
1587 Annotations::make_java_array(m->annotations(), THREAD));
1588 JVM_END
1589
1590
1591 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1592 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1593
1594 // method is a handle to a java.lang.reflect.Method object
1595 Method* m = jvm_get_method_common(method);
1596 return (jbyteArray) JNIHandles::make_local(env,
1597 Annotations::make_java_array(m->annotation_default(), THREAD));
1598 JVM_END
1599
1600
1601 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1602 JVMWrapper("JVM_GetMethodParameterAnnotations");
1603
1604 // method is a handle to a java.lang.reflect.Method object
1605 Method* m = jvm_get_method_common(method);
1606 return (jbyteArray) JNIHandles::make_local(env,
1607 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1608 JVM_END
1609
1610 /* Type use annotations support (JDK 1.8) */
1611
1612 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1613 assert (cls != NULL, "illegal class");
1614 JVMWrapper("JVM_GetClassTypeAnnotations");
1615 ResourceMark rm(THREAD);
1616 // Return null for arrays and primitives
1617 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1619 if (k->oop_is_instance()) {
1620 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1621 if (type_annotations != NULL) {
1622 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1623 return (jbyteArray) JNIHandles::make_local(env, a);
1624 }
1625 }
1626 }
1627 return NULL;
1628 JVM_END
1629
1630 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1631 if (!cp->is_within_bounds(index)) {
1632 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1633 }
1634 }
1635
1636 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1637 {
1638 JVMWrapper("JVM_GetMethodParameters");
1639 // method is a handle to a java.lang.reflect.Method object
1640 Method* method_ptr = jvm_get_method_common(method);
1641 methodHandle mh (THREAD, method_ptr);
1642 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1643 const int num_params = mh->method_parameters_length();
1644
1645 if (0 != num_params) {
1646 // make sure all the symbols are properly formatted
1647 for (int i = 0; i < num_params; i++) {
1648 MethodParametersElement* params = mh->method_parameters_start();
1649 int index = params[i].name_cp_index;
1650 bounds_check(mh->constants(), index, CHECK_NULL);
1651
1652 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1653 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1654 "Wrong type at constant pool index");
1655 }
1656
1657 }
1658
1659 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1660 objArrayHandle result (THREAD, result_oop);
1661
1662 for (int i = 0; i < num_params; i++) {
1663 MethodParametersElement* params = mh->method_parameters_start();
1664 // For a 0 index, give a NULL symbol
1665 Symbol* const sym = 0 != params[i].name_cp_index ?
1666 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1667 int flags = params[i].flags;
1668 oop param = Reflection::new_parameter(reflected_method, i, sym,
1669 flags, CHECK_NULL);
1670 result->obj_at_put(i, param);
1671 }
1672 return (jobjectArray)JNIHandles::make_local(env, result());
1673 } else {
1674 return (jobjectArray)NULL;
1675 }
1676 }
1677 JVM_END
1678
1679 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1680
1681 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1682 {
1683 JVMWrapper("JVM_GetClassDeclaredFields");
1684 JvmtiVMObjectAllocEventCollector oam;
1685
1686 // Exclude primitive types and array types
1687 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1688 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1689 // Return empty array
1690 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1691 return (jobjectArray) JNIHandles::make_local(env, res);
1692 }
1693
1694 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1695 constantPoolHandle cp(THREAD, k->constants());
1696
1697 // Ensure class is linked
1698 k->link_class(CHECK_NULL);
1699
1700 // 4496456 We need to filter out java.lang.Throwable.backtrace
1701 bool skip_backtrace = false;
1702
1703 // Allocate result
1704 int num_fields;
1705
1706 if (publicOnly) {
1707 num_fields = 0;
1708 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1709 if (fs.access_flags().is_public()) ++num_fields;
1710 }
1711 } else {
1712 num_fields = k->java_fields_count();
1713
1714 if (k() == SystemDictionary::Throwable_klass()) {
1715 num_fields--;
1716 skip_backtrace = true;
1717 }
1718 }
1719
1720 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1721 objArrayHandle result (THREAD, r);
1722
1723 int out_idx = 0;
1724 fieldDescriptor fd;
1725 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1726 if (skip_backtrace) {
1727 // 4496456 skip java.lang.Throwable.backtrace
1728 int offset = fs.offset();
1729 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1730 }
1731
1732 if (!publicOnly || fs.access_flags().is_public()) {
1733 fd.initialize(k(), fs.index());
1734 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1735 result->obj_at_put(out_idx, field);
1736 ++out_idx;
1737 }
1738 }
1739 assert(out_idx == num_fields, "just checking");
1740 return (jobjectArray) JNIHandles::make_local(env, result());
1741 }
1742 JVM_END
1743
1744 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1745 {
1746 JVMWrapper("JVM_GetClassDeclaredMethods");
1747 JvmtiVMObjectAllocEventCollector oam;
1748
1749 // Exclude primitive types and array types
1750 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1751 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1752 // Return empty array
1753 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1754 return (jobjectArray) JNIHandles::make_local(env, res);
1755 }
1756
1757 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1758
1759 // Ensure class is linked
1760 k->link_class(CHECK_NULL);
1761
1762 Array<Method*>* methods = k->methods();
1763 int methods_length = methods->length();
1764 int num_methods = 0;
1765
1766 int i;
1767 for (i = 0; i < methods_length; i++) {
1768 methodHandle method(THREAD, methods->at(i));
1769 if (!method->is_initializer()) {
1770 if (!publicOnly || method->is_public()) {
1771 ++num_methods;
1772 }
1773 }
1774 }
1775
1776 // Allocate result
1777 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1778 objArrayHandle result (THREAD, r);
1779
1780 int out_idx = 0;
1781 for (i = 0; i < methods_length; i++) {
1782 methodHandle method(THREAD, methods->at(i));
1783 if (!method->is_initializer()) {
1784 if (!publicOnly || method->is_public()) {
1785 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1786 result->obj_at_put(out_idx, m);
1787 ++out_idx;
1788 }
1789 }
1790 }
1791 assert(out_idx == num_methods, "just checking");
1792 return (jobjectArray) JNIHandles::make_local(env, result());
1793 }
1794 JVM_END
1795
1796 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1797 {
1798 JVMWrapper("JVM_GetClassDeclaredConstructors");
1799 JvmtiVMObjectAllocEventCollector oam;
1800
1801 // Exclude primitive types and array types
1802 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1803 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1804 // Return empty array
1805 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1806 return (jobjectArray) JNIHandles::make_local(env, res);
1807 }
1808
1809 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1810
1811 // Ensure class is linked
1812 k->link_class(CHECK_NULL);
1813
1814 Array<Method*>* methods = k->methods();
1815 int methods_length = methods->length();
1816 int num_constructors = 0;
1817
1818 int i;
1819 for (i = 0; i < methods_length; i++) {
1820 methodHandle method(THREAD, methods->at(i));
1821 if (method->is_initializer() && !method->is_static()) {
1822 if (!publicOnly || method->is_public()) {
1823 ++num_constructors;
1824 }
1825 }
1826 }
1827
1828 // Allocate result
1829 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1830 objArrayHandle result(THREAD, r);
1831
1832 int out_idx = 0;
1833 for (i = 0; i < methods_length; i++) {
1834 methodHandle method(THREAD, methods->at(i));
1835 if (method->is_initializer() && !method->is_static()) {
1836 if (!publicOnly || method->is_public()) {
1837 oop m = Reflection::new_constructor(method, CHECK_NULL);
1838 result->obj_at_put(out_idx, m);
1839 ++out_idx;
1840 }
1841 }
1842 }
1843 assert(out_idx == num_constructors, "just checking");
1844 return (jobjectArray) JNIHandles::make_local(env, result());
1845 }
1846 JVM_END
1847
1848 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1849 {
1850 JVMWrapper("JVM_GetClassAccessFlags");
1851 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1852 // Primitive type
1853 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1854 }
1855
1856 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1857 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1858 }
1859 JVM_END
1860
1861
1862 // Constant pool access //////////////////////////////////////////////////////////
1863
1864 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1865 {
1866 JVMWrapper("JVM_GetClassConstantPool");
1867 JvmtiVMObjectAllocEventCollector oam;
1868
1869 // Return null for primitives and arrays
1870 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1871 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1872 if (k->oop_is_instance()) {
1873 instanceKlassHandle k_h(THREAD, k);
1874 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1875 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1876 return JNIHandles::make_local(jcp());
1877 }
1878 }
1879 return NULL;
1880 }
1881 JVM_END
1882
1883
1884 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1885 {
1886 JVMWrapper("JVM_ConstantPoolGetSize");
1887 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1888 return cp->length();
1889 }
1890 JVM_END
1891
1892
1893 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1894 {
1895 JVMWrapper("JVM_ConstantPoolGetClassAt");
1896 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1897 bounds_check(cp, index, CHECK_NULL);
1898 constantTag tag = cp->tag_at(index);
1899 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1900 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1901 }
1902 Klass* k = cp->klass_at(index, CHECK_NULL);
1903 return (jclass) JNIHandles::make_local(k->java_mirror());
1904 }
1905 JVM_END
1906
1907 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1908 {
1909 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1910 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1911 bounds_check(cp, index, CHECK_NULL);
1912 constantTag tag = cp->tag_at(index);
1913 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1914 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1915 }
1916 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1917 if (k == NULL) return NULL;
1918 return (jclass) JNIHandles::make_local(k->java_mirror());
1919 }
1920 JVM_END
1921
1922 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1923 constantTag tag = cp->tag_at(index);
1924 if (!tag.is_method() && !tag.is_interface_method()) {
1925 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1926 }
1927 int klass_ref = cp->uncached_klass_ref_index_at(index);
1928 Klass* k_o;
1929 if (force_resolution) {
1930 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1931 } else {
1932 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1933 if (k_o == NULL) return NULL;
1934 }
1935 instanceKlassHandle k(THREAD, k_o);
1936 Symbol* name = cp->uncached_name_ref_at(index);
1937 Symbol* sig = cp->uncached_signature_ref_at(index);
1938 methodHandle m (THREAD, k->find_method(name, sig));
1939 if (m.is_null()) {
1940 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1941 }
1942 oop method;
1943 if (!m->is_initializer() || m->is_static()) {
1944 method = Reflection::new_method(m, true, true, CHECK_NULL);
1945 } else {
1946 method = Reflection::new_constructor(m, CHECK_NULL);
1947 }
1948 return JNIHandles::make_local(method);
1949 }
1950
1951 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1952 {
1953 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1954 JvmtiVMObjectAllocEventCollector oam;
1955 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1956 bounds_check(cp, index, CHECK_NULL);
1957 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1958 return res;
1959 }
1960 JVM_END
1961
1962 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1963 {
1964 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1965 JvmtiVMObjectAllocEventCollector oam;
1966 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1967 bounds_check(cp, index, CHECK_NULL);
1968 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1969 return res;
1970 }
1971 JVM_END
1972
1973 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1974 constantTag tag = cp->tag_at(index);
1975 if (!tag.is_field()) {
1976 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1977 }
1978 int klass_ref = cp->uncached_klass_ref_index_at(index);
1979 Klass* k_o;
1980 if (force_resolution) {
1981 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1982 } else {
1983 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1984 if (k_o == NULL) return NULL;
1985 }
1986 instanceKlassHandle k(THREAD, k_o);
1987 Symbol* name = cp->uncached_name_ref_at(index);
1988 Symbol* sig = cp->uncached_signature_ref_at(index);
1989 fieldDescriptor fd;
1990 Klass* target_klass = k->find_field(name, sig, &fd);
1991 if (target_klass == NULL) {
1992 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1993 }
1994 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1995 return JNIHandles::make_local(field);
1996 }
1997
1998 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
1999 {
2000 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2001 JvmtiVMObjectAllocEventCollector oam;
2002 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2003 bounds_check(cp, index, CHECK_NULL);
2004 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2005 return res;
2006 }
2007 JVM_END
2008
2009 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2010 {
2011 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2012 JvmtiVMObjectAllocEventCollector oam;
2013 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2014 bounds_check(cp, index, CHECK_NULL);
2015 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2016 return res;
2017 }
2018 JVM_END
2019
2020 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2021 {
2022 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2023 JvmtiVMObjectAllocEventCollector oam;
2024 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2025 bounds_check(cp, index, CHECK_NULL);
2026 constantTag tag = cp->tag_at(index);
2027 if (!tag.is_field_or_method()) {
2028 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2029 }
2030 int klass_ref = cp->uncached_klass_ref_index_at(index);
2031 Symbol* klass_name = cp->klass_name_at(klass_ref);
2032 Symbol* member_name = cp->uncached_name_ref_at(index);
2033 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2034 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2035 objArrayHandle dest(THREAD, dest_o);
2036 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2037 dest->obj_at_put(0, str());
2038 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2039 dest->obj_at_put(1, str());
2040 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2041 dest->obj_at_put(2, str());
2042 return (jobjectArray) JNIHandles::make_local(dest());
2043 }
2044 JVM_END
2045
2046 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2047 {
2048 JVMWrapper("JVM_ConstantPoolGetIntAt");
2049 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2050 bounds_check(cp, index, CHECK_0);
2051 constantTag tag = cp->tag_at(index);
2052 if (!tag.is_int()) {
2053 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2054 }
2055 return cp->int_at(index);
2056 }
2057 JVM_END
2058
2059 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2060 {
2061 JVMWrapper("JVM_ConstantPoolGetLongAt");
2062 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2063 bounds_check(cp, index, CHECK_(0L));
2064 constantTag tag = cp->tag_at(index);
2065 if (!tag.is_long()) {
2066 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2067 }
2068 return cp->long_at(index);
2069 }
2070 JVM_END
2071
2072 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2073 {
2074 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2075 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2076 bounds_check(cp, index, CHECK_(0.0f));
2077 constantTag tag = cp->tag_at(index);
2078 if (!tag.is_float()) {
2079 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2080 }
2081 return cp->float_at(index);
2082 }
2083 JVM_END
2084
2085 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2086 {
2087 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2088 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2089 bounds_check(cp, index, CHECK_(0.0));
2090 constantTag tag = cp->tag_at(index);
2091 if (!tag.is_double()) {
2092 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2093 }
2094 return cp->double_at(index);
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2099 {
2100 JVMWrapper("JVM_ConstantPoolGetStringAt");
2101 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_string()) {
2105 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 oop str = cp->string_at(index, CHECK_NULL);
2108 return (jstring) JNIHandles::make_local(str);
2109 }
2110 JVM_END
2111
2112 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2113 {
2114 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2115 JvmtiVMObjectAllocEventCollector oam;
2116 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_NULL);
2118 constantTag tag = cp->tag_at(index);
2119 if (!tag.is_symbol()) {
2120 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121 }
2122 Symbol* sym = cp->symbol_at(index);
2123 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2124 return (jstring) JNIHandles::make_local(str());
2125 }
2126 JVM_END
2127
2128
2129 // Assertion support. //////////////////////////////////////////////////////////
2130
2131 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2132 JVMWrapper("JVM_DesiredAssertionStatus");
2133 assert(cls != NULL, "bad class");
2134
2135 oop r = JNIHandles::resolve(cls);
2136 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2137 if (java_lang_Class::is_primitive(r)) return false;
2138
2139 Klass* k = java_lang_Class::as_Klass(r);
2140 assert(k->oop_is_instance(), "must be an instance klass");
2141 if (! k->oop_is_instance()) return false;
2142
2143 ResourceMark rm(THREAD);
2144 const char* name = k->name()->as_C_string();
2145 bool system_class = k->class_loader() == NULL;
2146 return JavaAssertions::enabled(name, system_class);
2147
2148 JVM_END
2149
2150
2151 // Return a new AssertionStatusDirectives object with the fields filled in with
2152 // command-line assertion arguments (i.e., -ea, -da).
2153 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2154 JVMWrapper("JVM_AssertionStatusDirectives");
2155 JvmtiVMObjectAllocEventCollector oam;
2156 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2157 return JNIHandles::make_local(env, asd);
2158 JVM_END
2159
2160 // Verification ////////////////////////////////////////////////////////////////////////////////
2161
2162 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2163
2164 // RedefineClasses support: bug 6214132 caused verification to fail.
2165 // All functions from this section should call the jvmtiThreadSate function:
2166 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2167 // The function returns a Klass* of the _scratch_class if the verifier
2168 // was invoked in the middle of the class redefinition.
2169 // Otherwise it returns its argument value which is the _the_class Klass*.
2170 // Please, refer to the description in the jvmtiThreadSate.hpp.
2171
2172 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2173 JVMWrapper("JVM_GetClassNameUTF");
2174 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2175 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2176 return k->name()->as_utf8();
2177 JVM_END
2178
2179
2180 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2181 JVMWrapper("JVM_GetClassCPTypes");
2182 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2183 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2184 // types will have length zero if this is not an InstanceKlass
2185 // (length is determined by call to JVM_GetClassCPEntriesCount)
2186 if (k->oop_is_instance()) {
2187 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2188 for (int index = cp->length() - 1; index >= 0; index--) {
2189 constantTag tag = cp->tag_at(index);
2190 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2191 }
2192 }
2193 JVM_END
2194
2195
2196 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2197 JVMWrapper("JVM_GetClassCPEntriesCount");
2198 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2199 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2200 if (!k->oop_is_instance())
2201 return 0;
2202 return InstanceKlass::cast(k)->constants()->length();
2203 JVM_END
2204
2205
2206 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2207 JVMWrapper("JVM_GetClassFieldsCount");
2208 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2209 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2210 if (!k->oop_is_instance())
2211 return 0;
2212 return InstanceKlass::cast(k)->java_fields_count();
2213 JVM_END
2214
2215
2216 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2217 JVMWrapper("JVM_GetClassMethodsCount");
2218 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2219 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2220 if (!k->oop_is_instance())
2221 return 0;
2222 return InstanceKlass::cast(k)->methods()->length();
2223 JVM_END
2224
2225
2226 // The following methods, used for the verifier, are never called with
2227 // array klasses, so a direct cast to InstanceKlass is safe.
2228 // Typically, these methods are called in a loop with bounds determined
2229 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2230 // zero for arrays.
2231 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2232 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2233 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2234 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2235 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2236 int length = method->checked_exceptions_length();
2237 if (length > 0) {
2238 CheckedExceptionElement* table= method->checked_exceptions_start();
2239 for (int i = 0; i < length; i++) {
2240 exceptions[i] = table[i].class_cp_index;
2241 }
2242 }
2243 JVM_END
2244
2245
2246 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2247 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2248 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2249 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2250 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2251 return method->checked_exceptions_length();
2252 JVM_END
2253
2254
2255 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2256 JVMWrapper("JVM_GetMethodIxByteCode");
2257 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2258 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2259 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2260 memcpy(code, method->code_base(), method->code_size());
2261 JVM_END
2262
2263
2264 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2265 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2266 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2268 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2269 return method->code_size();
2270 JVM_END
2271
2272
2273 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2274 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2276 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2277 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2278 ExceptionTable extable(method);
2279 entry->start_pc = extable.start_pc(entry_index);
2280 entry->end_pc = extable.end_pc(entry_index);
2281 entry->handler_pc = extable.handler_pc(entry_index);
2282 entry->catchType = extable.catch_type_index(entry_index);
2283 JVM_END
2284
2285
2286 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2287 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2290 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2291 return method->exception_table_length();
2292 JVM_END
2293
2294
2295 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2296 JVMWrapper("JVM_GetMethodIxModifiers");
2297 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2300 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2301 JVM_END
2302
2303
2304 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2305 JVMWrapper("JVM_GetFieldIxModifiers");
2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2308 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2309 JVM_END
2310
2311
2312 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2313 JVMWrapper("JVM_GetMethodIxLocalsCount");
2314 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2317 return method->max_locals();
2318 JVM_END
2319
2320
2321 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2322 JVMWrapper("JVM_GetMethodIxArgsSize");
2323 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2324 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2325 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2326 return method->size_of_parameters();
2327 JVM_END
2328
2329
2330 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2331 JVMWrapper("JVM_GetMethodIxMaxStack");
2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2335 return method->verifier_max_stack();
2336 JVM_END
2337
2338
2339 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2340 JVMWrapper("JVM_IsConstructorIx");
2341 ResourceMark rm(THREAD);
2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2345 return method->name() == vmSymbols::object_initializer_name();
2346 JVM_END
2347
2348
2349 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2350 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2351 ResourceMark rm(THREAD);
2352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2353 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2354 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2355 return method->is_overpass();
2356 JVM_END
2357
2358 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2359 JVMWrapper("JVM_GetMethodIxIxUTF");
2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363 return method->name()->as_utf8();
2364 JVM_END
2365
2366
2367 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2368 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372 return method->signature()->as_utf8();
2373 JVM_END
2374
2375 /**
2376 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2377 * read entries in the constant pool. Since the old verifier always
2378 * works on a copy of the code, it will not see any rewriting that
2379 * may possibly occur in the middle of verification. So it is important
2380 * that nothing it calls tries to use the cpCache instead of the raw
2381 * constant pool, so we must use cp->uncached_x methods when appropriate.
2382 */
2383 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2384 JVMWrapper("JVM_GetCPFieldNameUTF");
2385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2388 switch (cp->tag_at(cp_index).value()) {
2389 case JVM_CONSTANT_Fieldref:
2390 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2391 default:
2392 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2393 }
2394 ShouldNotReachHere();
2395 return NULL;
2396 JVM_END
2397
2398
2399 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2400 JVMWrapper("JVM_GetCPMethodNameUTF");
2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2403 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2404 switch (cp->tag_at(cp_index).value()) {
2405 case JVM_CONSTANT_InterfaceMethodref:
2406 case JVM_CONSTANT_Methodref:
2407 case JVM_CONSTANT_NameAndType: // for invokedynamic
2408 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2409 default:
2410 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2411 }
2412 ShouldNotReachHere();
2413 return NULL;
2414 JVM_END
2415
2416
2417 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2418 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2422 switch (cp->tag_at(cp_index).value()) {
2423 case JVM_CONSTANT_InterfaceMethodref:
2424 case JVM_CONSTANT_Methodref:
2425 case JVM_CONSTANT_NameAndType: // for invokedynamic
2426 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2427 default:
2428 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2429 }
2430 ShouldNotReachHere();
2431 return NULL;
2432 JVM_END
2433
2434
2435 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2436 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2440 switch (cp->tag_at(cp_index).value()) {
2441 case JVM_CONSTANT_Fieldref:
2442 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2443 default:
2444 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2445 }
2446 ShouldNotReachHere();
2447 return NULL;
2448 JVM_END
2449
2450
2451 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2452 JVMWrapper("JVM_GetCPClassNameUTF");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2456 Symbol* classname = cp->klass_name_at(cp_index);
2457 return classname->as_utf8();
2458 JVM_END
2459
2460
2461 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2462 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2466 switch (cp->tag_at(cp_index).value()) {
2467 case JVM_CONSTANT_Fieldref: {
2468 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2469 Symbol* classname = cp->klass_name_at(class_index);
2470 return classname->as_utf8();
2471 }
2472 default:
2473 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2474 }
2475 ShouldNotReachHere();
2476 return NULL;
2477 JVM_END
2478
2479
2480 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2481 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2482 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2483 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2484 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2485 switch (cp->tag_at(cp_index).value()) {
2486 case JVM_CONSTANT_Methodref:
2487 case JVM_CONSTANT_InterfaceMethodref: {
2488 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2489 Symbol* classname = cp->klass_name_at(class_index);
2490 return classname->as_utf8();
2491 }
2492 default:
2493 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2494 }
2495 ShouldNotReachHere();
2496 return NULL;
2497 JVM_END
2498
2499
2500 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2501 JVMWrapper("JVM_GetCPFieldModifiers");
2502 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2503 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2506 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2507 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2508 switch (cp->tag_at(cp_index).value()) {
2509 case JVM_CONSTANT_Fieldref: {
2510 Symbol* name = cp->uncached_name_ref_at(cp_index);
2511 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2512 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2513 if (fs.name() == name && fs.signature() == signature) {
2514 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2515 }
2516 }
2517 return -1;
2518 }
2519 default:
2520 fatal("JVM_GetCPFieldModifiers: illegal constant");
2521 }
2522 ShouldNotReachHere();
2523 return 0;
2524 JVM_END
2525
2526
2527 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2528 JVMWrapper("JVM_GetCPMethodModifiers");
2529 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2530 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2533 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2534 switch (cp->tag_at(cp_index).value()) {
2535 case JVM_CONSTANT_Methodref:
2536 case JVM_CONSTANT_InterfaceMethodref: {
2537 Symbol* name = cp->uncached_name_ref_at(cp_index);
2538 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2539 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2540 int methods_count = methods->length();
2541 for (int i = 0; i < methods_count; i++) {
2542 Method* method = methods->at(i);
2543 if (method->name() == name && method->signature() == signature) {
2544 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2545 }
2546 }
2547 return -1;
2548 }
2549 default:
2550 fatal("JVM_GetCPMethodModifiers: illegal constant");
2551 }
2552 ShouldNotReachHere();
2553 return 0;
2554 JVM_END
2555
2556
2557 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2558
2559 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2560 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2561 JVM_END
2562
2563
2564 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2565 JVMWrapper("JVM_IsSameClassPackage");
2566 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2567 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2568 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2569 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2570 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2571 JVM_END
2572
2573
2574 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2575
2576 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2577 JVMWrapper2("JVM_Open (%s)", fname);
2578
2579 //%note jvm_r6
2580 int result = os::open(fname, flags, mode);
2581 if (result >= 0) {
2582 return result;
2583 } else {
2584 switch(errno) {
2585 case EEXIST:
2586 return JVM_EEXIST;
2587 default:
2588 return -1;
2589 }
2590 }
2591 JVM_END
2592
2593
2594 JVM_LEAF(jint, JVM_Close(jint fd))
2595 JVMWrapper2("JVM_Close (0x%x)", fd);
2596 //%note jvm_r6
2597 return os::close(fd);
2598 JVM_END
2599
2600
2601 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2602 JVMWrapper2("JVM_Read (0x%x)", fd);
2603
2604 //%note jvm_r6
2605 return (jint)os::restartable_read(fd, buf, nbytes);
2606 JVM_END
2607
2608
2609 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2610 JVMWrapper2("JVM_Write (0x%x)", fd);
2611
2612 //%note jvm_r6
2613 return (jint)os::write(fd, buf, nbytes);
2614 JVM_END
2615
2616
2617 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2618 JVMWrapper2("JVM_Available (0x%x)", fd);
2619 //%note jvm_r6
2620 return os::available(fd, pbytes);
2621 JVM_END
2622
2623
2624 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2625 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2626 //%note jvm_r6
2627 return os::lseek(fd, offset, whence);
2628 JVM_END
2629
2630
2631 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2632 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2633 return os::ftruncate(fd, length);
2634 JVM_END
2635
2636
2637 JVM_LEAF(jint, JVM_Sync(jint fd))
2638 JVMWrapper2("JVM_Sync (0x%x)", fd);
2639 //%note jvm_r6
2640 return os::fsync(fd);
2641 JVM_END
2642
2643
2644 // Printing support //////////////////////////////////////////////////
2645 extern "C" {
2646
2647 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2648 // see bug 4399518, 4417214
2649 if ((intptr_t)count <= 0) return -1;
2650 return vsnprintf(str, count, fmt, args);
2651 }
2652
2653
2654 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2655 va_list args;
2656 int len;
2657 va_start(args, fmt);
2658 len = jio_vsnprintf(str, count, fmt, args);
2659 va_end(args);
2660 return len;
2661 }
2662
2663
2664 int jio_fprintf(FILE* f, const char *fmt, ...) {
2665 int len;
2666 va_list args;
2667 va_start(args, fmt);
2668 len = jio_vfprintf(f, fmt, args);
2669 va_end(args);
2670 return len;
2671 }
2672
2673
2674 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2675 if (Arguments::vfprintf_hook() != NULL) {
2676 return Arguments::vfprintf_hook()(f, fmt, args);
2677 } else {
2678 return vfprintf(f, fmt, args);
2679 }
2680 }
2681
2682
2683 JNIEXPORT int jio_printf(const char *fmt, ...) {
2684 int len;
2685 va_list args;
2686 va_start(args, fmt);
2687 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2688 va_end(args);
2689 return len;
2690 }
2691
2692
2693 // HotSpot specific jio method
2694 void jio_print(const char* s) {
2695 // Try to make this function as atomic as possible.
2696 if (Arguments::vfprintf_hook() != NULL) {
2697 jio_fprintf(defaultStream::output_stream(), "%s", s);
2698 } else {
2699 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2700 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2701 }
2702 }
2703
2704 } // Extern C
2705
2706 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2707
2708 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2709 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2710 // OSThread objects. The exception to this rule is when the target object is the thread
2711 // doing the operation, in which case we know that the thread won't exit until the
2712 // operation is done (all exits being voluntary). There are a few cases where it is
2713 // rather silly to do operations on yourself, like resuming yourself or asking whether
2714 // you are alive. While these can still happen, they are not subject to deadlocks if
2715 // the lock is held while the operation occurs (this is not the case for suspend, for
2716 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2717 // implementation is local to this file, we always lock Threads_lock for that one.
2718
2719 static void thread_entry(JavaThread* thread, TRAPS) {
2720 HandleMark hm(THREAD);
2721 Handle obj(THREAD, thread->threadObj());
2722 JavaValue result(T_VOID);
2723 JavaCalls::call_virtual(&result,
2724 obj,
2725 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2726 vmSymbols::run_method_name(),
2727 vmSymbols::void_method_signature(),
2728 THREAD);
2729 }
2730
2731
2732 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2733 JVMWrapper("JVM_StartThread");
2734 JavaThread *native_thread = NULL;
2735
2736 // We cannot hold the Threads_lock when we throw an exception,
2737 // due to rank ordering issues. Example: we might need to grab the
2738 // Heap_lock while we construct the exception.
2739 bool throw_illegal_thread_state = false;
2740
2741 // We must release the Threads_lock before we can post a jvmti event
2742 // in Thread::start.
2743 {
2744 // Ensure that the C++ Thread and OSThread structures aren't freed before
2745 // we operate.
2746 MutexLocker mu(Threads_lock);
2747
2748 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2749 // re-starting an already started thread, so we should usually find
2750 // that the JavaThread is null. However for a JNI attached thread
2751 // there is a small window between the Thread object being created
2752 // (with its JavaThread set) and the update to its threadStatus, so we
2753 // have to check for this
2754 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2755 throw_illegal_thread_state = true;
2756 } else {
2757 // We could also check the stillborn flag to see if this thread was already stopped, but
2758 // for historical reasons we let the thread detect that itself when it starts running
2759
2760 jlong size =
2761 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2762 // Allocate the C++ Thread structure and create the native thread. The
2763 // stack size retrieved from java is signed, but the constructor takes
2764 // size_t (an unsigned type), so avoid passing negative values which would
2765 // result in really large stacks.
2766 size_t sz = size > 0 ? (size_t) size : 0;
2767 native_thread = new JavaThread(&thread_entry, sz);
2768
2769 // At this point it may be possible that no osthread was created for the
2770 // JavaThread due to lack of memory. Check for this situation and throw
2771 // an exception if necessary. Eventually we may want to change this so
2772 // that we only grab the lock if the thread was created successfully -
2773 // then we can also do this check and throw the exception in the
2774 // JavaThread constructor.
2775 if (native_thread->osthread() != NULL) {
2776 // Note: the current thread is not being used within "prepare".
2777 native_thread->prepare(jthread);
2778 }
2779 }
2780 }
2781
2782 if (throw_illegal_thread_state) {
2783 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2784 }
2785
2786 assert(native_thread != NULL, "Starting null thread?");
2787
2788 if (native_thread->osthread() == NULL) {
2789 // No one should hold a reference to the 'native_thread'.
2790 delete native_thread;
2791 if (JvmtiExport::should_post_resource_exhausted()) {
2792 JvmtiExport::post_resource_exhausted(
2793 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2794 "unable to create new native thread");
2795 }
2796 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2797 "unable to create new native thread");
2798 }
2799
2800 Thread::start(native_thread);
2801
2802 JVM_END
2803
2804 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2805 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2806 // but is thought to be reliable and simple. In the case, where the receiver is the
2807 // same thread as the sender, no safepoint is needed.
2808 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2809 JVMWrapper("JVM_StopThread");
2810
2811 oop java_throwable = JNIHandles::resolve(throwable);
2812 if (java_throwable == NULL) {
2813 THROW(vmSymbols::java_lang_NullPointerException());
2814 }
2815 oop java_thread = JNIHandles::resolve_non_null(jthread);
2816 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2817 Events::log_exception(JavaThread::current(),
2818 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2819 receiver, (address)java_thread, throwable);
2820 // First check if thread is alive
2821 if (receiver != NULL) {
2822 // Check if exception is getting thrown at self (use oop equality, since the
2823 // target object might exit)
2824 if (java_thread == thread->threadObj()) {
2825 THROW_OOP(java_throwable);
2826 } else {
2827 // Enques a VM_Operation to stop all threads and then deliver the exception...
2828 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2829 }
2830 }
2831 else {
2832 // Either:
2833 // - target thread has not been started before being stopped, or
2834 // - target thread already terminated
2835 // We could read the threadStatus to determine which case it is
2836 // but that is overkill as it doesn't matter. We must set the
2837 // stillborn flag for the first case, and if the thread has already
2838 // exited setting this flag has no affect
2839 java_lang_Thread::set_stillborn(java_thread);
2840 }
2841 JVM_END
2842
2843
2844 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2845 JVMWrapper("JVM_IsThreadAlive");
2846
2847 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2848 return java_lang_Thread::is_alive(thread_oop);
2849 JVM_END
2850
2851
2852 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2853 JVMWrapper("JVM_SuspendThread");
2854 oop java_thread = JNIHandles::resolve_non_null(jthread);
2855 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2856
2857 if (receiver != NULL) {
2858 // thread has run and has not exited (still on threads list)
2859
2860 {
2861 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2862 if (receiver->is_external_suspend()) {
2863 // Don't allow nested external suspend requests. We can't return
2864 // an error from this interface so just ignore the problem.
2865 return;
2866 }
2867 if (receiver->is_exiting()) { // thread is in the process of exiting
2868 return;
2869 }
2870 receiver->set_external_suspend();
2871 }
2872
2873 // java_suspend() will catch threads in the process of exiting
2874 // and will ignore them.
2875 receiver->java_suspend();
2876
2877 // It would be nice to have the following assertion in all the
2878 // time, but it is possible for a racing resume request to have
2879 // resumed this thread right after we suspended it. Temporarily
2880 // enable this assertion if you are chasing a different kind of
2881 // bug.
2882 //
2883 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2884 // receiver->is_being_ext_suspended(), "thread is not suspended");
2885 }
2886 JVM_END
2887
2888
2889 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2890 JVMWrapper("JVM_ResumeThread");
2891 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2892 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2893 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2894 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2895 // looks at it.
2896 MutexLocker ml(Threads_lock);
2897 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2898 if (thr != NULL) {
2899 // the thread has run and is not in the process of exiting
2900 thr->java_resume();
2901 }
2902 JVM_END
2903
2904
2905 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2906 JVMWrapper("JVM_SetThreadPriority");
2907 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2908 MutexLocker ml(Threads_lock);
2909 oop java_thread = JNIHandles::resolve_non_null(jthread);
2910 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2911 JavaThread* thr = java_lang_Thread::thread(java_thread);
2912 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2913 Thread::set_priority(thr, (ThreadPriority)prio);
2914 }
2915 JVM_END
2916
2917
2918 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2919 JVMWrapper("JVM_Yield");
2920 if (os::dont_yield()) return;
2921 #ifndef USDT2
2922 HS_DTRACE_PROBE0(hotspot, thread__yield);
2923 #else /* USDT2 */
2924 HOTSPOT_THREAD_YIELD();
2925 #endif /* USDT2 */
2926 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2927 // Critical for similar threading behaviour
2928 if (ConvertYieldToSleep) {
2929 os::sleep(thread, MinSleepInterval, false);
2930 } else {
2931 os::yield();
2932 }
2933 JVM_END
2934
2935
2936 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2937 JVMWrapper("JVM_Sleep");
2938
2939 if (millis < 0) {
2940 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2941 }
2942
2943 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2944 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2945 }
2946
2947 // Save current thread state and restore it at the end of this block.
2948 // And set new thread state to SLEEPING.
2949 JavaThreadSleepState jtss(thread);
2950
2951 #ifndef USDT2
2952 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2953 #else /* USDT2 */
2954 HOTSPOT_THREAD_SLEEP_BEGIN(
2955 millis);
2956 #endif /* USDT2 */
2957
2958 if (millis == 0) {
2959 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2960 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2961 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2962 // for SOLARIS
2963 if (ConvertSleepToYield) {
2964 os::yield();
2965 } else {
2966 ThreadState old_state = thread->osthread()->get_state();
2967 thread->osthread()->set_state(SLEEPING);
2968 os::sleep(thread, MinSleepInterval, false);
2969 thread->osthread()->set_state(old_state);
2970 }
2971 } else {
2972 ThreadState old_state = thread->osthread()->get_state();
2973 thread->osthread()->set_state(SLEEPING);
2974 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2975 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2976 // us while we were sleeping. We do not overwrite those.
2977 if (!HAS_PENDING_EXCEPTION) {
2978 #ifndef USDT2
2979 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
2980 #else /* USDT2 */
2981 HOTSPOT_THREAD_SLEEP_END(
2982 1);
2983 #endif /* USDT2 */
2984 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2985 // to properly restore the thread state. That's likely wrong.
2986 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2987 }
2988 }
2989 thread->osthread()->set_state(old_state);
2990 }
2991 #ifndef USDT2
2992 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
2993 #else /* USDT2 */
2994 HOTSPOT_THREAD_SLEEP_END(
2995 0);
2996 #endif /* USDT2 */
2997 JVM_END
2998
2999 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3000 JVMWrapper("JVM_CurrentThread");
3001 oop jthread = thread->threadObj();
3002 assert (thread != NULL, "no current thread!");
3003 return JNIHandles::make_local(env, jthread);
3004 JVM_END
3005
3006
3007 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3008 JVMWrapper("JVM_CountStackFrames");
3009
3010 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3011 oop java_thread = JNIHandles::resolve_non_null(jthread);
3012 bool throw_illegal_thread_state = false;
3013 int count = 0;
3014
3015 {
3016 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3017 // We need to re-resolve the java_thread, since a GC might have happened during the
3018 // acquire of the lock
3019 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3020
3021 if (thr == NULL) {
3022 // do nothing
3023 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3024 // Check whether this java thread has been suspended already. If not, throws
3025 // IllegalThreadStateException. We defer to throw that exception until
3026 // Threads_lock is released since loading exception class has to leave VM.
3027 // The correct way to test a thread is actually suspended is
3028 // wait_for_ext_suspend_completion(), but we can't call that while holding
3029 // the Threads_lock. The above tests are sufficient for our purposes
3030 // provided the walkability of the stack is stable - which it isn't
3031 // 100% but close enough for most practical purposes.
3032 throw_illegal_thread_state = true;
3033 } else {
3034 // Count all java activation, i.e., number of vframes
3035 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3036 // Native frames are not counted
3037 if (!vfst.method()->is_native()) count++;
3038 }
3039 }
3040 }
3041
3042 if (throw_illegal_thread_state) {
3043 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3044 "this thread is not suspended");
3045 }
3046 return count;
3047 JVM_END
3048
3049 // Consider: A better way to implement JVM_Interrupt() is to acquire
3050 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3051 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3052 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3053 // outside the critical section. Threads_lock is hot so we want to minimize
3054 // the hold-time. A cleaner interface would be to decompose interrupt into
3055 // two steps. The 1st phase, performed under Threads_lock, would return
3056 // a closure that'd be invoked after Threads_lock was dropped.
3057 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3058 // admit spurious wakeups.
3059
3060 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3061 JVMWrapper("JVM_Interrupt");
3062
3063 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3064 oop java_thread = JNIHandles::resolve_non_null(jthread);
3065 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3066 // We need to re-resolve the java_thread, since a GC might have happened during the
3067 // acquire of the lock
3068 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3069 if (thr != NULL) {
3070 Thread::interrupt(thr);
3071 }
3072 JVM_END
3073
3074
3075 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3076 JVMWrapper("JVM_IsInterrupted");
3077
3078 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3079 oop java_thread = JNIHandles::resolve_non_null(jthread);
3080 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3081 // We need to re-resolve the java_thread, since a GC might have happened during the
3082 // acquire of the lock
3083 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3084 if (thr == NULL) {
3085 return JNI_FALSE;
3086 } else {
3087 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3088 }
3089 JVM_END
3090
3091
3092 // Return true iff the current thread has locked the object passed in
3093
3094 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3095 JVMWrapper("JVM_HoldsLock");
3096 assert(THREAD->is_Java_thread(), "sanity check");
3097 if (obj == NULL) {
3098 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3099 }
3100 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3101 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3102 JVM_END
3103
3104
3105 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3106 JVMWrapper("JVM_DumpAllStacks");
3107 VM_PrintThreads op;
3108 VMThread::execute(&op);
3109 if (JvmtiExport::should_post_data_dump()) {
3110 JvmtiExport::post_data_dump();
3111 }
3112 JVM_END
3113
3114 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3115 JVMWrapper("JVM_SetNativeThreadName");
3116 ResourceMark rm(THREAD);
3117 oop java_thread = JNIHandles::resolve_non_null(jthread);
3118 JavaThread* thr = java_lang_Thread::thread(java_thread);
3119 // Thread naming only supported for the current thread, doesn't work for
3120 // target threads.
3121 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3122 // we don't set the name of an attached thread to avoid stepping
3123 // on other programs
3124 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3125 os::set_native_thread_name(thread_name);
3126 }
3127 JVM_END
3128
3129 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3130
3131 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3132 assert(jthread->is_Java_thread(), "must be a Java thread");
3133 if (jthread->privileged_stack_top() == NULL) return false;
3134 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3135 oop loader = jthread->privileged_stack_top()->class_loader();
3136 if (loader == NULL) return true;
3137 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3138 if (trusted) return true;
3139 }
3140 return false;
3141 }
3142
3143 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3144 JVMWrapper("JVM_CurrentLoadedClass");
3145 ResourceMark rm(THREAD);
3146
3147 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3148 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3149 bool trusted = is_trusted_frame(thread, &vfst);
3150 if (trusted) return NULL;
3151
3152 Method* m = vfst.method();
3153 if (!m->is_native()) {
3154 InstanceKlass* holder = m->method_holder();
3155 oop loader = holder->class_loader();
3156 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3157 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3158 }
3159 }
3160 }
3161 return NULL;
3162 JVM_END
3163
3164
3165 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3166 JVMWrapper("JVM_CurrentClassLoader");
3167 ResourceMark rm(THREAD);
3168
3169 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3170
3171 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3172 bool trusted = is_trusted_frame(thread, &vfst);
3173 if (trusted) return NULL;
3174
3175 Method* m = vfst.method();
3176 if (!m->is_native()) {
3177 InstanceKlass* holder = m->method_holder();
3178 assert(holder->is_klass(), "just checking");
3179 oop loader = holder->class_loader();
3180 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3181 return JNIHandles::make_local(env, loader);
3182 }
3183 }
3184 }
3185 return NULL;
3186 JVM_END
3187
3188
3189 // Utility object for collecting method holders walking down the stack
3190 class KlassLink: public ResourceObj {
3191 public:
3192 KlassHandle klass;
3193 KlassLink* next;
3194
3195 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3196 };
3197
3198
3199 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3200 JVMWrapper("JVM_GetClassContext");
3201 ResourceMark rm(THREAD);
3202 JvmtiVMObjectAllocEventCollector oam;
3203 // Collect linked list of (handles to) method holders
3204 KlassLink* first = NULL;
3205 KlassLink* last = NULL;
3206 int depth = 0;
3207 vframeStream vfst(thread);
3208
3209 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3210 // This must only be called from SecurityManager.getClassContext
3211 Method* m = vfst.method();
3212 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3213 m->name() == vmSymbols::getClassContext_name() &&
3214 m->signature() == vmSymbols::void_class_array_signature())) {
3215 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3216 }
3217 }
3218
3219 // Collect method holders
3220 for (; !vfst.at_end(); vfst.security_next()) {
3221 Method* m = vfst.method();
3222 // Native frames are not returned
3223 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3224 Klass* holder = m->method_holder();
3225 assert(holder->is_klass(), "just checking");
3226 depth++;
3227 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3228 if (first == NULL) {
3229 first = last = l;
3230 } else {
3231 last->next = l;
3232 last = l;
3233 }
3234 }
3235 }
3236
3237 // Create result array of type [Ljava/lang/Class;
3238 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3239 // Fill in mirrors corresponding to method holders
3240 int index = 0;
3241 while (first != NULL) {
3242 result->obj_at_put(index++, first->klass()->java_mirror());
3243 first = first->next;
3244 }
3245 assert(index == depth, "just checking");
3246
3247 return (jobjectArray) JNIHandles::make_local(env, result);
3248 JVM_END
3249
3250
3251 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3252 JVMWrapper("JVM_ClassDepth");
3253 ResourceMark rm(THREAD);
3254 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3255 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3256
3257 const char* str = java_lang_String::as_utf8_string(class_name_str());
3258 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3259 if (class_name_sym == NULL) {
3260 return -1;
3261 }
3262
3263 int depth = 0;
3264
3265 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3266 if (!vfst.method()->is_native()) {
3267 InstanceKlass* holder = vfst.method()->method_holder();
3268 assert(holder->is_klass(), "just checking");
3269 if (holder->name() == class_name_sym) {
3270 return depth;
3271 }
3272 depth++;
3273 }
3274 }
3275 return -1;
3276 JVM_END
3277
3278
3279 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3280 JVMWrapper("JVM_ClassLoaderDepth");
3281 ResourceMark rm(THREAD);
3282 int depth = 0;
3283 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3284 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3285 bool trusted = is_trusted_frame(thread, &vfst);
3286 if (trusted) return -1;
3287
3288 Method* m = vfst.method();
3289 if (!m->is_native()) {
3290 InstanceKlass* holder = m->method_holder();
3291 assert(holder->is_klass(), "just checking");
3292 oop loader = holder->class_loader();
3293 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3294 return depth;
3295 }
3296 depth++;
3297 }
3298 }
3299 return -1;
3300 JVM_END
3301
3302
3303 // java.lang.Package ////////////////////////////////////////////////////////////////
3304
3305
3306 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3307 JVMWrapper("JVM_GetSystemPackage");
3308 ResourceMark rm(THREAD);
3309 JvmtiVMObjectAllocEventCollector oam;
3310 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3311 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3312 return (jstring) JNIHandles::make_local(result);
3313 JVM_END
3314
3315
3316 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3317 JVMWrapper("JVM_GetSystemPackages");
3318 JvmtiVMObjectAllocEventCollector oam;
3319 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3320 return (jobjectArray) JNIHandles::make_local(result);
3321 JVM_END
3322
3323
3324 // ObjectInputStream ///////////////////////////////////////////////////////////////
3325
3326 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3327 if (current_class == NULL) {
3328 return true;
3329 }
3330 if ((current_class == field_class) || access.is_public()) {
3331 return true;
3332 }
3333
3334 if (access.is_protected()) {
3335 // See if current_class is a subclass of field_class
3336 if (current_class->is_subclass_of(field_class)) {
3337 return true;
3338 }
3339 }
3340
3341 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3342 }
3343
3344
3345 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3346 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3347 JVMWrapper("JVM_AllocateNewObject");
3348 JvmtiVMObjectAllocEventCollector oam;
3349 // Receiver is not used
3350 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3351 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3352
3353 // Cannot instantiate primitive types
3354 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3355 ResourceMark rm(THREAD);
3356 THROW_0(vmSymbols::java_lang_InvalidClassException());
3357 }
3358
3359 // Arrays not allowed here, must use JVM_AllocateNewArray
3360 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3361 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3362 ResourceMark rm(THREAD);
3363 THROW_0(vmSymbols::java_lang_InvalidClassException());
3364 }
3365
3366 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3367 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3368
3369 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3370
3371 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3372 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3373
3374 // Make sure klass is initialized, since we are about to instantiate one of them.
3375 curr_klass->initialize(CHECK_NULL);
3376
3377 methodHandle m (THREAD,
3378 init_klass->find_method(vmSymbols::object_initializer_name(),
3379 vmSymbols::void_method_signature()));
3380 if (m.is_null()) {
3381 ResourceMark rm(THREAD);
3382 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3383 Method::name_and_sig_as_C_string(init_klass(),
3384 vmSymbols::object_initializer_name(),
3385 vmSymbols::void_method_signature()));
3386 }
3387
3388 if (curr_klass == init_klass && !m->is_public()) {
3389 // Calling the constructor for class 'curr_klass'.
3390 // Only allow calls to a public no-arg constructor.
3391 // This path corresponds to creating an Externalizable object.
3392 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3393 }
3394
3395 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3396 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3397 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3398 }
3399
3400 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3401 // Call constructor m. This might call a constructor higher up in the hierachy
3402 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3403
3404 return JNIHandles::make_local(obj());
3405 JVM_END
3406
3407
3408 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3409 JVMWrapper("JVM_AllocateNewArray");
3410 JvmtiVMObjectAllocEventCollector oam;
3411 oop mirror = JNIHandles::resolve_non_null(currClass);
3412
3413 if (java_lang_Class::is_primitive(mirror)) {
3414 THROW_0(vmSymbols::java_lang_InvalidClassException());
3415 }
3416 Klass* k = java_lang_Class::as_Klass(mirror);
3417 oop result;
3418
3419 if (k->oop_is_typeArray()) {
3420 // typeArray
3421 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3422 } else if (k->oop_is_objArray()) {
3423 // objArray
3424 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3425 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3426 result = oak->allocate(length, CHECK_NULL);
3427 } else {
3428 THROW_0(vmSymbols::java_lang_InvalidClassException());
3429 }
3430 return JNIHandles::make_local(env, result);
3431 JVM_END
3432
3433
3434 // Return the first non-null class loader up the execution stack, or null
3435 // if only code from the null class loader is on the stack.
3436
3437 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3438 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3439 // UseNewReflection
3440 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3441 oop loader = vfst.method()->method_holder()->class_loader();
3442 if (loader != NULL) {
3443 return JNIHandles::make_local(env, loader);
3444 }
3445 }
3446 return NULL;
3447 JVM_END
3448
3449
3450 // Load a class relative to the most recent class on the stack with a non-null
3451 // classloader.
3452 // This function has been deprecated and should not be considered part of the
3453 // specified JVM interface.
3454
3455 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3456 jclass currClass, jstring currClassName))
3457 JVMWrapper("JVM_LoadClass0");
3458 // Receiver is not used
3459 ResourceMark rm(THREAD);
3460
3461 // Class name argument is not guaranteed to be in internal format
3462 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3463 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3464
3465 const char* str = java_lang_String::as_utf8_string(string());
3466
3467 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3468 // It's impossible to create this class; the name cannot fit
3469 // into the constant pool.
3470 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3471 }
3472
3473 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3474 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3475 // Find the most recent class on the stack with a non-null classloader
3476 oop loader = NULL;
3477 oop protection_domain = NULL;
3478 if (curr_klass.is_null()) {
3479 for (vframeStream vfst(thread);
3480 !vfst.at_end() && loader == NULL;
3481 vfst.next()) {
3482 if (!vfst.method()->is_native()) {
3483 InstanceKlass* holder = vfst.method()->method_holder();
3484 loader = holder->class_loader();
3485 protection_domain = holder->protection_domain();
3486 }
3487 }
3488 } else {
3489 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3490 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3491 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3492 }
3493 Handle h_loader(THREAD, loader);
3494 Handle h_prot (THREAD, protection_domain);
3495 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3496 false, thread);
3497 if (TraceClassResolution && result != NULL) {
3498 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3499 }
3500 return result;
3501 JVM_END
3502
3503
3504 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3505
3506
3507 // resolve array handle and check arguments
3508 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3509 if (arr == NULL) {
3510 THROW_0(vmSymbols::java_lang_NullPointerException());
3511 }
3512 oop a = JNIHandles::resolve_non_null(arr);
3513 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3514 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3515 }
3516 return arrayOop(a);
3517 }
3518
3519
3520 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3521 JVMWrapper("JVM_GetArrayLength");
3522 arrayOop a = check_array(env, arr, false, CHECK_0);
3523 return a->length();
3524 JVM_END
3525
3526
3527 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3528 JVMWrapper("JVM_Array_Get");
3529 JvmtiVMObjectAllocEventCollector oam;
3530 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3531 jvalue value;
3532 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3533 oop box = Reflection::box(&value, type, CHECK_NULL);
3534 return JNIHandles::make_local(env, box);
3535 JVM_END
3536
3537
3538 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3539 JVMWrapper("JVM_GetPrimitiveArrayElement");
3540 jvalue value;
3541 value.i = 0; // to initialize value before getting used in CHECK
3542 arrayOop a = check_array(env, arr, true, CHECK_(value));
3543 assert(a->is_typeArray(), "just checking");
3544 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3545 BasicType wide_type = (BasicType) wCode;
3546 if (type != wide_type) {
3547 Reflection::widen(&value, type, wide_type, CHECK_(value));
3548 }
3549 return value;
3550 JVM_END
3551
3552
3553 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3554 JVMWrapper("JVM_SetArrayElement");
3555 arrayOop a = check_array(env, arr, false, CHECK);
3556 oop box = JNIHandles::resolve(val);
3557 jvalue value;
3558 value.i = 0; // to initialize value before getting used in CHECK
3559 BasicType value_type;
3560 if (a->is_objArray()) {
3561 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3562 value_type = Reflection::unbox_for_regular_object(box, &value);
3563 } else {
3564 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3565 }
3566 Reflection::array_set(&value, a, index, value_type, CHECK);
3567 JVM_END
3568
3569
3570 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3571 JVMWrapper("JVM_SetPrimitiveArrayElement");
3572 arrayOop a = check_array(env, arr, true, CHECK);
3573 assert(a->is_typeArray(), "just checking");
3574 BasicType value_type = (BasicType) vCode;
3575 Reflection::array_set(&v, a, index, value_type, CHECK);
3576 JVM_END
3577
3578
3579 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3580 JVMWrapper("JVM_NewArray");
3581 JvmtiVMObjectAllocEventCollector oam;
3582 oop element_mirror = JNIHandles::resolve(eltClass);
3583 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3584 return JNIHandles::make_local(env, result);
3585 JVM_END
3586
3587
3588 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3589 JVMWrapper("JVM_NewMultiArray");
3590 JvmtiVMObjectAllocEventCollector oam;
3591 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3592 oop element_mirror = JNIHandles::resolve(eltClass);
3593 assert(dim_array->is_typeArray(), "just checking");
3594 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3595 return JNIHandles::make_local(env, result);
3596 JVM_END
3597
3598
3599 // Networking library support ////////////////////////////////////////////////////////////////////
3600
3601 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3602 JVMWrapper("JVM_InitializeSocketLibrary");
3603 return 0;
3604 JVM_END
3605
3606
3607 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3608 JVMWrapper("JVM_Socket");
3609 return os::socket(domain, type, protocol);
3610 JVM_END
3611
3612
3613 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3614 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3615 //%note jvm_r6
3616 return os::socket_close(fd);
3617 JVM_END
3618
3619
3620 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3621 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3622 //%note jvm_r6
3623 return os::socket_shutdown(fd, howto);
3624 JVM_END
3625
3626
3627 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3628 JVMWrapper2("JVM_Recv (0x%x)", fd);
3629 //%note jvm_r6
3630 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3631 JVM_END
3632
3633
3634 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3635 JVMWrapper2("JVM_Send (0x%x)", fd);
3636 //%note jvm_r6
3637 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3638 JVM_END
3639
3640
3641 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3642 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3643 //%note jvm_r6
3644 return os::timeout(fd, timeout);
3645 JVM_END
3646
3647
3648 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3649 JVMWrapper2("JVM_Listen (0x%x)", fd);
3650 //%note jvm_r6
3651 return os::listen(fd, count);
3652 JVM_END
3653
3654
3655 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3656 JVMWrapper2("JVM_Connect (0x%x)", fd);
3657 //%note jvm_r6
3658 return os::connect(fd, him, (socklen_t)len);
3659 JVM_END
3660
3661
3662 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3663 JVMWrapper2("JVM_Bind (0x%x)", fd);
3664 //%note jvm_r6
3665 return os::bind(fd, him, (socklen_t)len);
3666 JVM_END
3667
3668
3669 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3670 JVMWrapper2("JVM_Accept (0x%x)", fd);
3671 //%note jvm_r6
3672 socklen_t socklen = (socklen_t)(*len);
3673 jint result = os::accept(fd, him, &socklen);
3674 *len = (jint)socklen;
3675 return result;
3676 JVM_END
3677
3678
3679 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3680 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3681 //%note jvm_r6
3682 socklen_t socklen = (socklen_t)(*fromlen);
3683 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3684 *fromlen = (int)socklen;
3685 return result;
3686 JVM_END
3687
3688
3689 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3690 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3691 //%note jvm_r6
3692 socklen_t socklen = (socklen_t)(*len);
3693 jint result = os::get_sock_name(fd, him, &socklen);
3694 *len = (int)socklen;
3695 return result;
3696 JVM_END
3697
3698
3699 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3700 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3701 //%note jvm_r6
3702 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3703 JVM_END
3704
3705
3706 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3707 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3708 //%note jvm_r6
3709 return os::socket_available(fd, pbytes);
3710 JVM_END
3711
3712
3713 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3714 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3715 //%note jvm_r6
3716 socklen_t socklen = (socklen_t)(*optlen);
3717 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3718 *optlen = (int)socklen;
3719 return result;
3720 JVM_END
3721
3722
3723 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3724 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3725 //%note jvm_r6
3726 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3727 JVM_END
3728
3729
3730 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3731 JVMWrapper("JVM_GetHostName");
3732 return os::get_host_name(name, namelen);
3733 JVM_END
3734
3735
3736 // Library support ///////////////////////////////////////////////////////////////////////////
3737
3738 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3739 //%note jvm_ct
3740 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3741 char ebuf[1024];
3742 void *load_result;
3743 {
3744 ThreadToNativeFromVM ttnfvm(thread);
3745 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3746 }
3747 if (load_result == NULL) {
3748 char msg[1024];
3749 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3750 // Since 'ebuf' may contain a string encoded using
3751 // platform encoding scheme, we need to pass
3752 // Exceptions::unsafe_to_utf8 to the new_exception method
3753 // as the last argument. See bug 6367357.
3754 Handle h_exception =
3755 Exceptions::new_exception(thread,
3756 vmSymbols::java_lang_UnsatisfiedLinkError(),
3757 msg, Exceptions::unsafe_to_utf8);
3758
3759 THROW_HANDLE_0(h_exception);
3760 }
3761 return load_result;
3762 JVM_END
3763
3764
3765 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3766 JVMWrapper("JVM_UnloadLibrary");
3767 os::dll_unload(handle);
3768 JVM_END
3769
3770
3771 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3772 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3773 return os::dll_lookup(handle, name);
3774 JVM_END
3775
3776
3777 // Floating point support ////////////////////////////////////////////////////////////////////
3778
3779 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3780 JVMWrapper("JVM_IsNaN");
3781 return g_isnan(a);
3782 JVM_END
3783
3784
3785 // JNI version ///////////////////////////////////////////////////////////////////////////////
3786
3787 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3788 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3789 return Threads::is_supported_jni_version_including_1_1(version);
3790 JVM_END
3791
3792
3793 // String support ///////////////////////////////////////////////////////////////////////////
3794
3795 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3796 JVMWrapper("JVM_InternString");
3797 JvmtiVMObjectAllocEventCollector oam;
3798 if (str == NULL) return NULL;
3799 oop string = JNIHandles::resolve_non_null(str);
3800 oop result = StringTable::intern(string, CHECK_NULL);
3801 return (jstring) JNIHandles::make_local(env, result);
3802 JVM_END
3803
3804
3805 // Raw monitor support //////////////////////////////////////////////////////////////////////
3806
3807 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3808 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3809 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3810 // that only works with java threads.
3811
3812
3813 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3814 VM_Exit::block_if_vm_exited();
3815 JVMWrapper("JVM_RawMonitorCreate");
3816 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3817 }
3818
3819
3820 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3821 VM_Exit::block_if_vm_exited();
3822 JVMWrapper("JVM_RawMonitorDestroy");
3823 delete ((Mutex*) mon);
3824 }
3825
3826
3827 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3828 VM_Exit::block_if_vm_exited();
3829 JVMWrapper("JVM_RawMonitorEnter");
3830 ((Mutex*) mon)->jvm_raw_lock();
3831 return 0;
3832 }
3833
3834
3835 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3836 VM_Exit::block_if_vm_exited();
3837 JVMWrapper("JVM_RawMonitorExit");
3838 ((Mutex*) mon)->jvm_raw_unlock();
3839 }
3840
3841
3842 // Support for Serialization
3843
3844 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3845 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3846 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3847 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3848
3849 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3850 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3851 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3852 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3853
3854
3855 void initialize_converter_functions() {
3856 if (JDK_Version::is_gte_jdk14x_version()) {
3857 // These functions only exist for compatibility with 1.3.1 and earlier
3858 return;
3859 }
3860
3861 // called from universe_post_init()
3862 assert(
3863 int_bits_to_float_fn == NULL &&
3864 long_bits_to_double_fn == NULL &&
3865 float_to_int_bits_fn == NULL &&
3866 double_to_long_bits_fn == NULL ,
3867 "initialization done twice"
3868 );
3869 // initialize
3870 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3871 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3872 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3873 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3874 // verify
3875 assert(
3876 int_bits_to_float_fn != NULL &&
3877 long_bits_to_double_fn != NULL &&
3878 float_to_int_bits_fn != NULL &&
3879 double_to_long_bits_fn != NULL ,
3880 "initialization failed"
3881 );
3882 }
3883
3884
3885 // Serialization
3886 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3887 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3888 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3889
3890 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3891 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3892 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3893 oop o = JNIHandles::resolve(obj);
3894
3895 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3896 THROW(vmSymbols::java_lang_NullPointerException());
3897 }
3898
3899 jsize nfids = fids->length();
3900 if (nfids == 0) return;
3901
3902 if (tcodes->length() < nfids) {
3903 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3904 }
3905
3906 jsize off = 0;
3907 /* loop through fields, setting values */
3908 for (jsize i = 0; i < nfids; i++) {
3909 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3910 int field_offset;
3911 if (fid != NULL) {
3912 // NULL is a legal value for fid, but retrieving the field offset
3913 // trigger assertion in that case
3914 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3915 }
3916
3917 switch (tcodes->char_at(i)) {
3918 case 'Z':
3919 if (fid != NULL) {
3920 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3921 o->bool_field_put(field_offset, val);
3922 }
3923 off++;
3924 break;
3925
3926 case 'B':
3927 if (fid != NULL) {
3928 o->byte_field_put(field_offset, dbuf->byte_at(off));
3929 }
3930 off++;
3931 break;
3932
3933 case 'C':
3934 if (fid != NULL) {
3935 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3936 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3937 o->char_field_put(field_offset, val);
3938 }
3939 off += 2;
3940 break;
3941
3942 case 'S':
3943 if (fid != NULL) {
3944 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3945 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3946 o->short_field_put(field_offset, val);
3947 }
3948 off += 2;
3949 break;
3950
3951 case 'I':
3952 if (fid != NULL) {
3953 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3954 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3955 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3956 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3957 o->int_field_put(field_offset, ival);
3958 }
3959 off += 4;
3960 break;
3961
3962 case 'F':
3963 if (fid != NULL) {
3964 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3965 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3966 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3967 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3968 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3969 o->float_field_put(field_offset, fval);
3970 }
3971 off += 4;
3972 break;
3973
3974 case 'J':
3975 if (fid != NULL) {
3976 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3977 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3978 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3979 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3980 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3981 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3982 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3983 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3984 o->long_field_put(field_offset, lval);
3985 }
3986 off += 8;
3987 break;
3988
3989 case 'D':
3990 if (fid != NULL) {
3991 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3992 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3993 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3994 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3995 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3996 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3997 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3998 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3999 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4000 o->double_field_put(field_offset, dval);
4001 }
4002 off += 8;
4003 break;
4004
4005 default:
4006 // Illegal typecode
4007 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4008 }
4009 }
4010 JVM_END
4011
4012
4013 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4014 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4015 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4016
4017 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4018 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4019 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4020 oop o = JNIHandles::resolve(obj);
4021
4022 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4023 THROW(vmSymbols::java_lang_NullPointerException());
4024 }
4025
4026 jsize nfids = fids->length();
4027 if (nfids == 0) return;
4028
4029 if (tcodes->length() < nfids) {
4030 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4031 }
4032
4033 /* loop through fields, fetching values */
4034 jsize off = 0;
4035 for (jsize i = 0; i < nfids; i++) {
4036 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4037 if (fid == NULL) {
4038 THROW(vmSymbols::java_lang_NullPointerException());
4039 }
4040 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4041
4042 switch (tcodes->char_at(i)) {
4043 case 'Z':
4044 {
4045 jboolean val = o->bool_field(field_offset);
4046 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4047 }
4048 break;
4049
4050 case 'B':
4051 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4052 break;
4053
4054 case 'C':
4055 {
4056 jchar val = o->char_field(field_offset);
4057 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4058 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4059 }
4060 break;
4061
4062 case 'S':
4063 {
4064 jshort val = o->short_field(field_offset);
4065 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4066 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4067 }
4068 break;
4069
4070 case 'I':
4071 {
4072 jint val = o->int_field(field_offset);
4073 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4074 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4075 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4076 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4077 }
4078 break;
4079
4080 case 'F':
4081 {
4082 jfloat fval = o->float_field(field_offset);
4083 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4084 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4085 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4086 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4087 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4088 }
4089 break;
4090
4091 case 'J':
4092 {
4093 jlong val = o->long_field(field_offset);
4094 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4095 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4096 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4097 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4098 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4099 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4100 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4101 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4102 }
4103 break;
4104
4105 case 'D':
4106 {
4107 jdouble dval = o->double_field(field_offset);
4108 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4109 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4110 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4111 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4112 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4113 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4114 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4115 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4116 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4117 }
4118 break;
4119
4120 default:
4121 // Illegal typecode
4122 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4123 }
4124 }
4125 JVM_END
4126
4127
4128 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4129
4130 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4131 // Security Note:
4132 // The Java level wrapper will perform the necessary security check allowing
4133 // us to pass the NULL as the initiating class loader.
4134 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4135
4136 KlassHandle klass_handle(THREAD, klass);
4137 // Check if we should initialize the class
4138 if (init && klass_handle->oop_is_instance()) {
4139 klass_handle->initialize(CHECK_NULL);
4140 }
4141 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4142 }
4143
4144
4145 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4146
4147 #ifndef PRODUCT
4148
4149 extern "C" {
4150 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4151 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4152 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4153 }
4154
4155 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4156 JVMWrapper("JVM_AccessBoolVMFlag");
4157 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4158 JVM_END
4159
4160 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4161 JVMWrapper("JVM_AccessVMIntFlag");
4162 intx v;
4163 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4164 *value = (jint)v;
4165 return result;
4166 JVM_END
4167
4168
4169 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4170 JVMWrapper("JVM_VMBreakPoint");
4171 oop the_obj = JNIHandles::resolve(obj);
4172 BREAKPOINT;
4173 JVM_END
4174
4175
4176 #endif
4177
4178
4179 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4180
4181 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4182 JVMWrapper("JVM_InvokeMethod");
4183 Handle method_handle;
4184 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4185 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4186 Handle receiver(THREAD, JNIHandles::resolve(obj));
4187 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4188 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4189 jobject res = JNIHandles::make_local(env, result);
4190 if (JvmtiExport::should_post_vm_object_alloc()) {
4191 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4192 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4193 if (java_lang_Class::is_primitive(ret_type)) {
4194 // Only for primitive type vm allocates memory for java object.
4195 // See box() method.
4196 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4197 }
4198 }
4199 return res;
4200 } else {
4201 THROW_0(vmSymbols::java_lang_StackOverflowError());
4202 }
4203 JVM_END
4204
4205
4206 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4207 JVMWrapper("JVM_NewInstanceFromConstructor");
4208 oop constructor_mirror = JNIHandles::resolve(c);
4209 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4210 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4211 jobject res = JNIHandles::make_local(env, result);
4212 if (JvmtiExport::should_post_vm_object_alloc()) {
4213 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4214 }
4215 return res;
4216 JVM_END
4217
4218 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4219
4220 JVM_LEAF(jboolean, JVM_SupportsCX8())
4221 JVMWrapper("JVM_SupportsCX8");
4222 return VM_Version::supports_cx8();
4223 JVM_END
4224
4225
4226 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4227 JVMWrapper("JVM_CX8Field");
4228 jlong res;
4229 oop o = JNIHandles::resolve(obj);
4230 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4231 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4232
4233 assert(VM_Version::supports_cx8(), "cx8 not supported");
4234 res = Atomic::cmpxchg(newVal, addr, oldVal);
4235
4236 return res == oldVal;
4237 JVM_END
4238
4239 // DTrace ///////////////////////////////////////////////////////////////////
4240
4241 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4242 JVMWrapper("JVM_DTraceGetVersion");
4243 return (jint)JVM_TRACING_DTRACE_VERSION;
4244 JVM_END
4245
4246 JVM_ENTRY(jlong,JVM_DTraceActivate(
4247 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4248 JVM_DTraceProvider* providers))
4249 JVMWrapper("JVM_DTraceActivate");
4250 return DTraceJSDT::activate(
4251 version, module_name, providers_count, providers, CHECK_0);
4252 JVM_END
4253
4254 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4255 JVMWrapper("JVM_DTraceIsProbeEnabled");
4256 return DTraceJSDT::is_probe_enabled(method);
4257 JVM_END
4258
4259 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4260 JVMWrapper("JVM_DTraceDispose");
4261 DTraceJSDT::dispose(handle);
4262 JVM_END
4263
4264 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4265 JVMWrapper("JVM_DTraceIsSupported");
4266 return DTraceJSDT::is_supported();
4267 JVM_END
4268
4269 // Returns an array of all live Thread objects (VM internal JavaThreads,
4270 // jvmti agent threads, and JNI attaching threads are skipped)
4271 // See CR 6404306 regarding JNI attaching threads
4272 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4273 ResourceMark rm(THREAD);
4274 ThreadsListEnumerator tle(THREAD, false, false);
4275 JvmtiVMObjectAllocEventCollector oam;
4276
4277 int num_threads = tle.num_threads();
4278 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4279 objArrayHandle threads_ah(THREAD, r);
4280
4281 for (int i = 0; i < num_threads; i++) {
4282 Handle h = tle.get_threadObj(i);
4283 threads_ah->obj_at_put(i, h());
4284 }
4285
4286 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4287 JVM_END
4288
4289
4290 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4291 // Return StackTraceElement[][], each element is the stack trace of a thread in
4292 // the corresponding entry in the given threads array
4293 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4294 JVMWrapper("JVM_DumpThreads");
4295 JvmtiVMObjectAllocEventCollector oam;
4296
4297 // Check if threads is null
4298 if (threads == NULL) {
4299 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4300 }
4301
4302 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4303 objArrayHandle ah(THREAD, a);
4304 int num_threads = ah->length();
4305 // check if threads is non-empty array
4306 if (num_threads == 0) {
4307 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4308 }
4309
4310 // check if threads is not an array of objects of Thread class
4311 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4312 if (k != SystemDictionary::Thread_klass()) {
4313 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4314 }
4315
4316 ResourceMark rm(THREAD);
4317
4318 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4319 for (int i = 0; i < num_threads; i++) {
4320 oop thread_obj = ah->obj_at(i);
4321 instanceHandle h(THREAD, (instanceOop) thread_obj);
4322 thread_handle_array->append(h);
4323 }
4324
4325 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4326 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4327
4328 JVM_END
4329
4330 // JVM monitoring and management support
4331 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4332 return Management::get_jmm_interface(version);
4333 JVM_END
4334
4335 // com.sun.tools.attach.VirtualMachine agent properties support
4336 //
4337 // Initialize the agent properties with the properties maintained in the VM
4338 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4339 JVMWrapper("JVM_InitAgentProperties");
4340 ResourceMark rm;
4341
4342 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4343
4344 PUTPROP(props, "sun.java.command", Arguments::java_command());
4345 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4346 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4347 return properties;
4348 JVM_END
4349
4350 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4351 {
4352 JVMWrapper("JVM_GetEnclosingMethodInfo");
4353 JvmtiVMObjectAllocEventCollector oam;
4354
4355 if (ofClass == NULL) {
4356 return NULL;
4357 }
4358 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4359 // Special handling for primitive objects
4360 if (java_lang_Class::is_primitive(mirror())) {
4361 return NULL;
4362 }
4363 Klass* k = java_lang_Class::as_Klass(mirror());
4364 if (!k->oop_is_instance()) {
4365 return NULL;
4366 }
4367 instanceKlassHandle ik_h(THREAD, k);
4368 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4369 if (encl_method_class_idx == 0) {
4370 return NULL;
4371 }
4372 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4373 objArrayHandle dest(THREAD, dest_o);
4374 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4375 dest->obj_at_put(0, enc_k->java_mirror());
4376 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4377 if (encl_method_method_idx != 0) {
4378 Symbol* sym = ik_h->constants()->symbol_at(
4379 extract_low_short_from_int(
4380 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4381 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4382 dest->obj_at_put(1, str());
4383 sym = ik_h->constants()->symbol_at(
4384 extract_high_short_from_int(
4385 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4386 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4387 dest->obj_at_put(2, str());
4388 }
4389 return (jobjectArray) JNIHandles::make_local(dest());
4390 }
4391 JVM_END
4392
4393 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4394 jint javaThreadState))
4395 {
4396 // If new thread states are added in future JDK and VM versions,
4397 // this should check if the JDK version is compatible with thread
4398 // states supported by the VM. Return NULL if not compatible.
4399 //
4400 // This function must map the VM java_lang_Thread::ThreadStatus
4401 // to the Java thread state that the JDK supports.
4402 //
4403
4404 typeArrayHandle values_h;
4405 switch (javaThreadState) {
4406 case JAVA_THREAD_STATE_NEW : {
4407 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4408 values_h = typeArrayHandle(THREAD, r);
4409 values_h->int_at_put(0, java_lang_Thread::NEW);
4410 break;
4411 }
4412 case JAVA_THREAD_STATE_RUNNABLE : {
4413 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4414 values_h = typeArrayHandle(THREAD, r);
4415 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4416 break;
4417 }
4418 case JAVA_THREAD_STATE_BLOCKED : {
4419 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4420 values_h = typeArrayHandle(THREAD, r);
4421 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4422 break;
4423 }
4424 case JAVA_THREAD_STATE_WAITING : {
4425 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4426 values_h = typeArrayHandle(THREAD, r);
4427 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4428 values_h->int_at_put(1, java_lang_Thread::PARKED);
4429 break;
4430 }
4431 case JAVA_THREAD_STATE_TIMED_WAITING : {
4432 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4433 values_h = typeArrayHandle(THREAD, r);
4434 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4435 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4436 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4437 break;
4438 }
4439 case JAVA_THREAD_STATE_TERMINATED : {
4440 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4441 values_h = typeArrayHandle(THREAD, r);
4442 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4443 break;
4444 }
4445 default:
4446 // Unknown state - probably incompatible JDK version
4447 return NULL;
4448 }
4449
4450 return (jintArray) JNIHandles::make_local(env, values_h());
4451 }
4452 JVM_END
4453
4454
4455 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4456 jint javaThreadState,
4457 jintArray values))
4458 {
4459 // If new thread states are added in future JDK and VM versions,
4460 // this should check if the JDK version is compatible with thread
4461 // states supported by the VM. Return NULL if not compatible.
4462 //
4463 // This function must map the VM java_lang_Thread::ThreadStatus
4464 // to the Java thread state that the JDK supports.
4465 //
4466
4467 ResourceMark rm;
4468
4469 // Check if threads is null
4470 if (values == NULL) {
4471 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4472 }
4473
4474 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4475 typeArrayHandle values_h(THREAD, v);
4476
4477 objArrayHandle names_h;
4478 switch (javaThreadState) {
4479 case JAVA_THREAD_STATE_NEW : {
4480 assert(values_h->length() == 1 &&
4481 values_h->int_at(0) == java_lang_Thread::NEW,
4482 "Invalid threadStatus value");
4483
4484 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4485 1, /* only 1 substate */
4486 CHECK_NULL);
4487 names_h = objArrayHandle(THREAD, r);
4488 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4489 names_h->obj_at_put(0, name());
4490 break;
4491 }
4492 case JAVA_THREAD_STATE_RUNNABLE : {
4493 assert(values_h->length() == 1 &&
4494 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4495 "Invalid threadStatus value");
4496
4497 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4498 1, /* only 1 substate */
4499 CHECK_NULL);
4500 names_h = objArrayHandle(THREAD, r);
4501 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4502 names_h->obj_at_put(0, name());
4503 break;
4504 }
4505 case JAVA_THREAD_STATE_BLOCKED : {
4506 assert(values_h->length() == 1 &&
4507 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4508 "Invalid threadStatus value");
4509
4510 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4511 1, /* only 1 substate */
4512 CHECK_NULL);
4513 names_h = objArrayHandle(THREAD, r);
4514 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4515 names_h->obj_at_put(0, name());
4516 break;
4517 }
4518 case JAVA_THREAD_STATE_WAITING : {
4519 assert(values_h->length() == 2 &&
4520 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4521 values_h->int_at(1) == java_lang_Thread::PARKED,
4522 "Invalid threadStatus value");
4523 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4524 2, /* number of substates */
4525 CHECK_NULL);
4526 names_h = objArrayHandle(THREAD, r);
4527 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4528 CHECK_NULL);
4529 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4530 CHECK_NULL);
4531 names_h->obj_at_put(0, name0());
4532 names_h->obj_at_put(1, name1());
4533 break;
4534 }
4535 case JAVA_THREAD_STATE_TIMED_WAITING : {
4536 assert(values_h->length() == 3 &&
4537 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4538 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4539 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4540 "Invalid threadStatus value");
4541 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4542 3, /* number of substates */
4543 CHECK_NULL);
4544 names_h = objArrayHandle(THREAD, r);
4545 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4546 CHECK_NULL);
4547 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4548 CHECK_NULL);
4549 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4550 CHECK_NULL);
4551 names_h->obj_at_put(0, name0());
4552 names_h->obj_at_put(1, name1());
4553 names_h->obj_at_put(2, name2());
4554 break;
4555 }
4556 case JAVA_THREAD_STATE_TERMINATED : {
4557 assert(values_h->length() == 1 &&
4558 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4559 "Invalid threadStatus value");
4560 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4561 1, /* only 1 substate */
4562 CHECK_NULL);
4563 names_h = objArrayHandle(THREAD, r);
4564 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4565 names_h->obj_at_put(0, name());
4566 break;
4567 }
4568 default:
4569 // Unknown state - probably incompatible JDK version
4570 return NULL;
4571 }
4572 return (jobjectArray) JNIHandles::make_local(env, names_h());
4573 }
4574 JVM_END
4575
4576 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4577 {
4578 memset(info, 0, sizeof(info_size));
4579
4580 info->jvm_version = Abstract_VM_Version::jvm_version();
4581 info->update_version = 0; /* 0 in HotSpot Express VM */
4582 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4583
4584 // when we add a new capability in the jvm_version_info struct, we should also
4585 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4586 // counter defined in runtimeService.cpp.
4587 info->is_attachable = AttachListener::is_attach_supported();
4588 }
4589 JVM_END